US20130114571A1 - Coordinated forward link blanking and power boosting for flexible bandwidth systems - Google Patents

Abstract

Methods, systems, and devices are provided for coordinating forward link blanking and/or power boosting in wireless communications systems. Some embodiments include two or more bandwidth systems. The bandwidth of one bandwidth system may overlap with the bandwidth of another bandwidth system. This overlap may create interference. Coordinating forward link blanking and/or power boosting may aid in reducing the impact of this interference. Some embodiments utilize flexible bandwidth and/or normal bandwidth systems. Flexible bandwidth systems may utilize portions of spectrum that may not be big enough to fit a normal waveform, though some embodiments may utilize flexible waveforms that utilize more bandwidth than a normal waveform.

Description

CROSS-RELATED APPLICATIONS
• The present application for patent claims priority to Provisional Application No. 61/556,777 entitled “FRACTIONAL SYSTEMS IN WIRELESS COMMUNICATIONS” filed Nov. 7, 2011, and assigned to the assignee hereof and hereby expressly incorporated by reference herein. The present application for patent also claims priority to Provisional Application No. 61/568,742 entitled “SIGNAL CAPACITY BOOSTING, COORDINATED FORWARD LINK BLANKING AND POWER BOOSTING, AND REVERSE LINK THROUGHPUT INCREASING FOR FLEXIBLE BANDWIDTH SYSTEMS” filed Dec. 9, 2011, and assigned to the assignee hereof and hereby expressly incorporated by reference herein.
BACKGROUND
• Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include code-division multiple access (CDMA) systems, time-division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, 3GPP Long Term Evolution (LTE) systems, and orthogonal frequency-division multiple access (OFDMA) systems.
• Service providers are typically allocated blocks of frequency spectrum for exclusive use in certain geographic regions. These blocks of frequencies are generally assigned by regulators regardless of the multiple access technology being used. In most cases, these blocks are not integer multiple of channel bandwidths, hence there may be unutilized parts of the spectrum. As the use of wireless devices has increased, the demand for and value of this spectrum has generally surged, as well. Nonetheless, in some cases, wireless communications systems may not utilize portions of the allocated spectrum because the portions are not big enough to fit a standard or normal waveform. The developers of the LTE standard, for example, recognized the problem and decided to support 6 different system bandwidths, namely 1.4, 3, 5, 10, 15 and 20 MHz. This may provide one partial solution to the problem. In addition, the different system bandwidths typically do not overlap, which may help avoid interference.
SUMMARY
• Methods, systems, and devices are provided for coordinating forward link blanking and/or power boosting in wireless communications systems. Some embodiments include two or more bandwidth systems. The bandwidth of one bandwidth system may overlap with the bandwidth of another bandwidth system. This overlap may create interference. Coordinating forward link blanking and/or power boosting may aid in reducing the impact of this interference. Some embodiments utilize flexible bandwidth and/or normal bandwidth systems.
• Flexible bandwidth waveforms for wireless communications systems may utilize portions of spectrum that may not be big enough to fit a normal waveform utilizing flexible waveforms. A flexible bandwidth system may be generated with respect to a normal bandwidth system through dilating, or scaling down, the time or the chip rate of the flexible bandwidth system with respect to the normal bandwidth system. Some embodiments may increase the bandwidth of a waveform through expanding, or scaling up, the time or the chip rate of the flexible bandwidth system.
• Some embodiments include a method of reducing interference within a wireless communications system. The method may include: identifying a first carrier bandwidth that at least partially overlaps a second carrier bandwidth of the wireless communications system; and/or coordinating a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.
• The method of reducing interference within the wireless communications system may include increasing a power of transmission over the second carrier bandwidth during the coordinated transmission blanking over the first carrier bandwidth. Coordinating the transmission blanking on the forward link over the first carrier bandwidth further may include determining a timing of a control transmission over the second carrier bandwidth and coordinating the transmission blanking based on the determined timing of the control channel transmission over the second carrier bandwidth. Coordinating the transmission blanking on the forward link over the first carrier bandwidth further may include determining a data transmission over the second carrier bandwidth. Coordinating the transmission blanking on the forward link over the first carrier bandwidth may occur during the data transmission over the second carrier bandwidth.
• The method of reducing interference within the wireless communications system may include changing the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidths based on at least a time of day. The method of reducing interference within the wireless communications system may include changing the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidths based on at least a loading of the forward link.
• In some embodiments, at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth. In some embodiments, the first carrier bandwidth and the second carrier bandwidth are normal carrier bandwidths. The first carrier bandwidth may fully overlap the second carrier bandwidth.
• The coordinated transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier bandwidth may occur at a co-location. The coordinated transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier bandwidth may not be co-located. The coordinated transmission blanking over the first carrier bandwidth may occur at a pre-scheduled time. The coordinated transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier bandwidth may be synchronized with respect to at least an absolute time or a known time offset.
• In some embodiments, at least the first carrier bandwidth or the second carrier bandwidth utilizes licensed spectrum. The first carrier bandwidth and the second carrier bandwidth may utilize different radio access technologies (RAT).
• Coordinating the transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth may include coordinating a hard transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth. The coordinated hard transmission blanking may include no flow being scheduled for transmission during a period of the coordinated hard transmission blanking. Coordinating the transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth may include coordinating a soft transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth. The coordinated soft transmission blanking may include a transmission of at least a priority flow or a delay sensitive flow during a period of the coordinated soft transmission blanking. The coordinated soft transmission blanking may include reducing a power of transmission during a period of the coordinated soft transmission blanking. The coordinated soft transmission blanking may include a transmission during a portion of the coordinated soft transmission blanking less than an entire period of the coordinated soft transmission blanking. Some embodiments further include receiving a request from the second carrier bandwidth to coordinate the transmission blanking at a specific time; and/or agreeing to accommodate the request from the second carrier bandwidth.
• The coordinated transmission blanking may occur at a base station. The wireless communications system may include a time division multiplexing system. The coordinated transmission blanking over the first carrier bandwidth may occur at a slot level.
• The power increase over the second carrier bandwidth and the coordinated transmission blanking over the first carrier bandwidth may be applied independently. The power increase over the second carrier bandwidth and the coordinated transmission blanking over the first carrier bandwidth may be applied together. The power increase over the second carrier bandwidth and the coordinated transmission blanking over the first carrier bandwidth may be activated in co-located systems. The power increase over the second carrier bandwidth and the coordinated transmission blanking over the first carrier bandwidth may be activated in co-located systems based on a load of the co-located systems.
• Some embodiments include increasing at least a data rate of at least a control channel or data channel utilizing the power increase over the second carrier bandwidth. Some embodiments include increasing a power of transmission over the first carrier bandwidth during a period of time different than the coordinated transmission blanking over the first carrier bandwidth. Some embodiments include coordinating the concurrent transmission over the second carrier bandwidth during one or more slots when the first carrier bandwidth is not transmitting. Some embodiments include coordinating a transmission blanking on a forward link over the second carrier bandwidth during a concurrent transmission over the first carrier bandwidth or increasing a power of transmission over the first carrier bandwidth during a coordinated transmission blanking on a forward link over the second carrier bandwidth. Coordinating the transmission blanking on the forward link over the second carrier bandwidth during the concurrent transmission over the first carrier bandwidth may depend at least upon a relative loading of the first carrier bandwidth with respect to the second carrier bandwidth or a time of day. Some embodiments include coordinating a power transmission increase over the first carrier bandwidth during a coordinated transmission blanking on a forward link over the second carrier bandwidth. Some embodiments include identifying a third carrier bandwidth different from the second carrier bandwidth that at least partially overlaps the first carrier bandwidth of the wireless communications system; and/or coordinating a transmission blanking on the forward link over the first carrier bandwidth during a concurrent transmission over the third carrier bandwidth.
• The previous methods may also be implemented in some embodiments by a wireless communications system configured for reducing interference, a wireless communications device configured for reducing interference, and/or a computer program product for reducing interference within a wireless communications system that includes a non-transitory computer-readable medium.
• Some embodiments include a wireless communications system configured for reducing interference. The system may include: a means for identifying a first carrier bandwidth that at least partially overlaps a second carrier bandwidth of the wireless communications system; and/or a means for coordinating a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.
• The wireless communications system configured for reducing interference may include a means for coordinating the transmission blanking on the forward link over the first carrier bandwidth during a control channel transmission over the second carrier bandwidth. The wireless communications system configured for reducing interference may include a means for changing the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth based on at least a time of day or a loading of the forward link. In some embodiments, at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.
• The wireless communications system configured for reducing interference may include a means for coordinating a hard transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth. The wireless communications system configured for reducing interference may include a means for coordinating a soft transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth. The wireless communications system configured for reducing interference may include a means for increasing a transmission power over the second carrier bandwidth during the coordinated transmission blanking over the first carrier bandwidth.
• The wireless communications system configured for reducing interference may include means for implementing the other aspects of the method of reducing interference within the wireless communications system described above.
• Some embodiments include a computer program product for reducing interference within a wireless communications system. The computer program product may include a non-transitory computer-readable medium that includes: code for identifying a first carrier bandwidth that at least partially overlaps a second carrier bandwidth of the wireless communications system; and/or code for coordinating a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.
• The non-transitory computer-readable medium may include code for coordinating the transmission blanking on the forward link over the first carrier bandwidth during a control channel transmission over the second carrier bandwidth. The non-transitory computer-readable medium may include code for changing the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth based on at least a time of day or a loading of the forward link. At least the first carrier bandwidth or the second carrier bandwidth may be a flexible carrier bandwidth.
• The non-transitory computer-readable medium may include code for coordinating a hard transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth. The non-transitory computer-readable medium may include code for coordinating a soft transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth. The non-transitory computer-readable medium may include code for increasing a transmission power over the second carrier bandwidth during the coordinated transmission blanking over the first carrier bandwidth.
• The computer program product for reducing interference within a wireless communications system that includes a non-transitory may include code for implementing the other aspects of the method of reducing interference within the wireless communications system described above.
• Some embodiments include a wireless communications device configured for reducing interference within a wireless communications system. The device may include at least one processor configured to: identify a first carrier bandwidth that at least partially overlaps a second carrier bandwidth of the wireless communications system; and/or coordinate a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.
• The at least one processor may be further configured to coordinate the transmission blanking on the forward link over the first carrier bandwidth during a control channel transmission over the second carrier bandwidth. The at least one processor may be further configured to change the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth based on at least a time of day or a loading of the forward link. In some embodiments, at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.
• The at least one processor may be further configured to coordinate a hard transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth. The at least one processor may be further configured to coordinate a soft transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.
• The at least one processor may be further configured to implement the other aspects of the method of reducing interference within the wireless communications system described above.
• Some embodiments include a method of reducing interference within a wireless communications system. The method may include: identifying a first carrier bandwidth and a second carrier bandwidth of the wireless communications system, wherein the first carrier bandwidth at least partially overlaps the second carrier bandwidth; and/or coordinating a transmission power increase for a forward link over the first carrier bandwidth with respect to the second carrier bandwidth.
• The method of reducing interference within the wireless communications system may include determining at least a time of day or a loading of the forward link and coordinating the transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth changes based on at least the determined time of day or the determined loading of the forward link. The method of reducing interference within the wireless communications system may include receiving a request to coordinate the transmission power increase at a specific time. The method of reducing interference within the wireless communications system may include coordinating a transmission blanking over the second carrier bandwidth during the coordinated transmission power increase over the first carrier bandwidth. In some embodiments, at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.
• The method of reducing interference within the wireless communications system may include coordinating the transmission power increase where the power increase occurs at a pre-scheduled time. The method of reducing interference within the wireless communications system may include coordinating the transmission power increase where the power increase occurs at a base station.
• The method of reducing interference within the wireless communications system may include identifying a third carrier bandwidth and the second carrier bandwidth of the wireless communications system, wherein the second carrier bandwidth partially overlaps the third carrier bandwidth; and/or coordinating a transmission power increase for a forward link over the third carrier bandwidth with respect to the second carrier bandwidth.
• The previous methods may also be implemented in some embodiments by a wireless communications system configured for reducing interference, a wireless communications device configured for reducing interference, and/or a computer program product for reducing interference within a wireless communications system that includes a non-transitory computer-readable medium.
• Some embodiments include a wireless communications system configured for reducing interference. The system may include: a means for identifying a first carrier bandwidth and a second carrier bandwidth of the wireless communications system, wherein the first carrier bandwidth at least partially overlaps the second carrier bandwidth; and/or a means for coordinating a transmission power increase for a forward link over the first carrier bandwidth with respect to the second carrier bandwidth.
• The wireless communications system configured for reducing interference may include a means for changing the coordinated transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth based on at least a time of day or a loading of the forward link. In some embodiments, least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.
• The wireless communications system configured for reducing interference may include a means for coordinating a transmission blanking over the second carrier bandwidth during the coordinated transmission power increase over the first carrier bandwidth. The wireless communications system configured for reducing interference may include a means for receiving a request to coordinate the transmission power increase at a specific time.
• The wireless communications system configured for reducing interference may include means for implementing the other aspects of the method of reducing interference within the wireless communications system described above.
• Some embodiments include computer program product for reducing interference within a wireless communications system including a non-transitory computer-readable medium. The non-transitory computer readable medium may include: code for identifying a first carrier bandwidth and a second carrier bandwidth of the wireless communications system, wherein the first carrier bandwidth at least partially overlaps the second carrier bandwidth; and/or code for coordinating a transmission power increase for a forward link over the first carrier bandwidth with respect to the second carrier bandwidth.
• The non-transitory computer-readable medium may include code for changing the coordinated transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth based on at least a time of day or a loading of the forward link. In some embodiments, least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.
• The non-transitory computer readable medium may include code for implementing the other aspects of the method of reducing interference within the wireless communications system described above.
• Some embodiments include a wireless communications device configured for reducing interference. The device may include at least one processor configured to: identify a first carrier bandwidth and a second carrier bandwidth of the wireless communications system, wherein the first carrier bandwidth at least partially overlaps the second carrier bandwidth; and/or coordinate a transmission power increase for a forward link over the first carrier bandwidth with respect to the second carrier bandwidth.
• The at least one processor may be further configured to change the coordinated transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth based on at least a time of day or a loading of the forward link. In some embodiments, at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.
• The at least one processor may be further configured to coordinate a transmission blanking over the second carrier bandwidth during the coordinated transmission power increase over the first carrier bandwidth. The at least one processor may be further configured to receive a request to coordinate the transmission power increase at a specific time.
• The at least one processor may be further configured to implement the other aspects of the method of reducing interference within the wireless communications system described above.
• The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the spirit and scope of the appended claims. Features which are believed to be characteristic of the concepts disclosed herein, both as to their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purpose of illustration and description only, and not as a definition of the limits of the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
• A further understanding of the nature and advantages of the present invention may be realized by reference to the following drawings. In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
• FIG. 1 shows a block diagram of a wireless communications system in accordance with various embodiments;
• FIG. 2A shows an example of a wireless communications system where a flexible waveform fits into a portion of spectrum not broad enough to fit a normal waveform in accordance with various embodiments;
• FIG. 2B shows an example of a wireless communications system where a flexible waveform fits into a portion of spectrum near an edge of a band in accordance with various embodiments;
• FIG. 2C shows an example of a wireless communications system where a flexible waveform partially overlaps a normal waveform in accordance with various embodiments;
• FIG. 2D shows an example of a wireless communications system where a flexible waveform is completely overlapped by a normal waveform in accordance with various embodiments;
• FIG. 2E shows an example of a wireless communications system where one flexible waveform is completely overlapped by a normal waveform and another flexible waveform partially overlaps a normal waveform in accordance with various embodiments;
• FIG. 2F shows an example of a wireless communications system where one normal waveform partially overlaps another normal waveform in accordance with various embodiments;
• FIG. 3 shows a block diagram of a wireless communications system in accordance with various embodiments;
• FIG. 4 shows an example of frame and slot structure of a normal bandwidth system and a flexible bandwidth system in accordance with various embodiments;
• FIG. 5 shows an example of transmission blanking on a normal bandwidth system coordinated with control channel transmissions on a flexible bandwidth system in accordance with various embodiments;
• FIG. 6 shows a block diagram of a device that includes interference reduction functionality in accordance with various embodiments;
• FIG. 7 shows a block diagram of a mobile device in accordance with various embodiments;
• FIG. 8 shows a block diagram of a wireless communications system in accordance with various embodiments;
• FIG. 9 shows a block diagram of a wireless communications system that includes a base station and a mobile device in accordance with various embodiments;
• FIG. 10A shows a flow diagram of a method for reducing interference within a wireless communications system in accordance with various embodiments;
• FIG. 10B shows a flow diagram of a method for reducing interference within a wireless communications system in accordance with various embodiments;
• FIG. 10C shows a flow diagram of a method for reducing interference within a wireless communications system in accordance with various embodiments;
• FIG. 11A shows a flow diagram of a method for reducing interference within a wireless communications system in accordance with various embodiments;
• FIG. 11B shows a flow diagram of a method for reducing interference within a wireless communications system in accordance with various embodiments; and
• FIG. 11C shows a flow diagram of a method for reducing interference within a wireless communications system in accordance with various embodiments.
DETAILED DESCRIPTION
• Methods, systems, and devices are provided for coordinating forward link blanking and/or power boosting in wireless communications systems. Some embodiments include two or more bandwidth systems. The bandwidth of one bandwidth system may overlap with the bandwidth of another bandwidth system. This overlap may create interference. Coordinating forward link blanking and/or power boosting may aid in reducing the impact of this interference. Some embodiments utilize flexible bandwidth and/or normal bandwidth systems.
• Some embodiments may utilize hard blanking and/or soft blanking. For example, some embodiments may utilize hard blanking in one system where no data is scheduled for one or more slots in that system. In some cases, pilot and/or MAC transmissions may still happen in those slots as in empty slots. Soft blanking may include situations where a base station, for example, may not be completely silent in the data portion of the slots but where the base station may transmit less than what the base station would have in the absence of soft blanking, for example. Soft blanking may include transmissions of at least a priority flow or a delay sensitive flow over at least a portion of the blanking duration, for example. Soft blanking may include reducing a power of transmission. Soft blanking may include reducing power of certain channels.
• Flexible bandwidth waveforms for wireless communications systems may utilize portions of spectrum that may not be big enough to fit a normal waveform utilizing flexible waveforms. A flexible bandwidth system may be generated with respect to a normal bandwidth system through dilating, or scaling down, the time or the chip rate of the flexible bandwidth system with respect to the normal bandwidth system. Some embodiments may increase the bandwidth of a waveform through expanding, or scaling up, the time or the chip rate of the flexible bandwidth system.
• Techniques described herein may be used for various wireless communications systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, Peer-to-Peer, and other systems. The terms “system” and “network” are often used interchangeably. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. IS-2000 Releases 0 and A are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA or OFDM system may implement a radio technology such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP). CDMA2000 and UMB are described in documents from an organization named “3rdGeneration Partnership Project 2” (3GPP2). The techniques described herein may be used for the systems and radio technologies mentioned above, as well as other systems and radio technologies.
• Thus, the following description provides examples, and is not limiting of the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various embodiments may omit, substitute, or add various procedures or components as appropriate. For instance, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, features described with respect to certain embodiments may be combined in other embodiments.
• Referring first toFIG. 1, a block diagram illustrates an example of awireless communications system100 in accordance with various embodiments. Thesystem100 includesbase stations105,mobile devices115, abase station controller120, and a core network130 (thecontroller120 may be integrated into thecore network130 in some embodiments; in some embodiments,controller120 may be integrated into base stations105). Thesystem100 may support operation on multiple carriers (waveform signals of different frequencies). Multi-carrier transmitters can transmit modulated signals simultaneously on the multiple carriers. Each modulated signal may be a Code Division Multiple Access (CDMA) signal, Time Division Multiple Access (TDMA) signal, Frequency Division Multiple Access (FDMA) signal, Orthogonal FDMA (OFDMA) signal, Single-Carrier FDMA (SC-FDMA) signal, etc. Each modulated signal may be sent on a different carrier and may carry control information (e.g., pilot signals), overhead information, data, etc. Thesystem100 may be a multi-carrier LTE network capable of efficiently allocating network resources.
• Themobile devices115 may be any type of mobile station, mobile device, access terminal, subscriber unit, or user equipment. Themobile devices115 may include cellular phones and wireless communications devices, but may also include personal digital assistants (PDAs), smartphones, other handheld devices, netbooks, notebook computers, etc. Thus, the term mobile device should be interpreted broadly hereinafter, including the claims, to include any type of wireless or mobile communications device.
• Thebase stations105 may wirelessly communicate with themobile devices115 via a base station antenna. Thebase stations105 may be configured to communicate with themobile devices115 under the control of thecontroller120 via multiple carriers. Each of thebase station105 sites can provide communication coverage for a respective geographic area. In some embodiments,base stations105 may be referred to as a NodeB, eNodeB, Home NodeB, and/or Home eNodeB. The coverage area for eachbase station105 here is identified as110-a,110-b, or110-c. The coverage area for a base station may be divided into sectors (not shown, but making up only a portion of the coverage area). Thesystem100 may includebase stations105 of different types (e.g., macro, micro, femto, and/or pico base stations).
• The different aspects ofsystem100, such as themobile devices115, thebase stations105, thecore network130, and/or thecontroller120 may be configured to utilize flexible bandwidth and waveforms in accordance with various embodiments.System100, for example, showstransmissions125 betweenmobile devices115 andbase stations105. Thetransmissions125 may include uplink and/or reverse link transmission, from amobile device115 to abase station105, and/or downlink and/or forward link transmissions, from abase station105 to amobile device115. Thetransmissions125 may include flexible and/or normal waveforms. Normal waveforms may also be referred to as legacy and/or normal waveforms.
• The different aspects ofsystem100, such as themobile devices115, thebase stations105, thecore network130, and/or thecontroller120 may be configured to utilize flexible bandwidth and waveforms in accordance with various embodiments. For example, different aspects ofsystem100 may utilize portions of spectrum that may not be big enough to fit a normal waveform. Devices such as themobile devices115, thebase stations105, thecore network130, and/or thecontroller120 may be configured to adapt the chip rates and/or scaling factors to generate and/or utilize flexible bandwidth and/or waveforms. Some aspects ofsystem100 may form a flexible subsystem (such as certainmobile devices115 and/or base stations105) that may be generated with respect to a normal subsystem (that may be implemented using othermobile devices115 and/or base stations105) through dilating, or scaling down, the time of the flexible subsystem with respect to the time of the normal subsystem.
• In some embodiments, different aspects ofsystem100, such as themobile devices115, thebase stations105, thecore network130, and/or thecontroller120 may be configured for coordinating forward link blanking and/or power boosting in normal and/or flexible bandwidth systems. For example, transmissions between amobile device115 and abase station105 may utilize bandwidth of a flexible waveform that may overlap with the bandwidth of a normal waveform. This overlap may create additional interference. Thebase station105 may coordinate forward link blanking and/or power boosting that may aid in reducing the impact of this interference.
• FIG. 2A shows an example of a wireless communications system200-awith a base station105-aand a mobile device115-ain accordance with various embodiments, where a flexible waveform210-afits into a portion of spectrum not broad enough to fit a normal waveform220-a. System200-amay be an example ofsystem100 ofFIG. 1. In some embodiments, the flexible waveform210-amay overlap with the normal waveform220-athat either the base105-aand/or the mobile device115-amay transmit. In some cases, the normal waveform220-amay completely overlap the flexible waveform210-a. Some embodiments may also utilize multipleflexible waveforms210. In some embodiments, another base station and/or mobile device (not shown) may transmit the normal waveform220-aand/or the flexible waveform210-a.
• In some embodiments, the mobile device115-aand/or the base station105-amay be configured to separate the signaling and the data traffic into differentflexible bandwidth carriers210 so that assigned resources can be customized to different traffic patterns. The base station105-amay be configured to coordinate forward link blanking and/or power boosting with respect to the normal waveform220-aand/or flexible waveform210-a. For example, transmissions between mobile device115-aand base station105-amay utilize bandwidth of the flexible waveform210-athat may overlap with the bandwidth of the normal waveform220-a. In some embodiments, the mobile device115-aand/or base station105-amay be configured for increasing reverse link throughput by coordination of multiple wireless systems using reverse link blanking. Base stations105-amay utilize different indicators to prompt a device, such as a mobile device115-a, to utilize reverse link blanking on a normal waveform220-ato increase throughput for an overlapping flexible waveform210-a. In some embodiments, reverse link blanking may also occur on a flexible waveform210-a. Some embodiments may also utilize power boosting on the reverse link to increase reverse link throughput, such as on the flexible waveform210-a.FIG. 2B shows an example of a wireless communications system200-bwith a base station105-band mobile device115-b, where a flexible waveform210-bfits into a portion of spectrum near an edge of a band, which may be a guard band, where normal waveform220-bmay not fit. System200-bmay be an example ofsystem100 ofFIG. 1.
• FIG. 2C shows an example of a wireless communications system200-cwhere a flexible waveform210-cpartially overlaps a normal waveform220-cin accordance with various embodiments. System200-cmay be an example ofsystem100 ofFIG. 1.FIG. 2D shows an example of a wireless communications systems200-dwhere a flexible waveform210-dis completely overlapped by a normal waveform220-din accordance with various embodiments. System200-dmay be an example ofsystem100 ofFIG. 1.FIG. 2E shows an example of a wireless communications system200-ewhere one flexible waveform210-fis completely overlapped by a normal waveform220-eand another flexible waveform210-epartially overlaps the normal waveform220-ein accordance with various embodiments. System200-emay be an example ofsystem100 ofFIG. 1.FIG. 2F shows an example of a wireless communications system200-fwhere one normal waveform220-fpartially overlaps another normal waveform220-gin accordance with various embodiments. System200-fmay be an example ofsystem100 ofFIG. 1.
• In general, a first waveform or carrier bandwidth and a second waveform or carrier bandwidth may partially overlap when they overlap by at least 1%, 2%, and/or 5%. In some embodiments, partial overlap may occur when the overlap is at least 10%. In some embodiments, the partial overlap may be less than 99%, 98%, and/or 95%. In some embodiments, the overlap may be less than 90%. In some cases, a flexible waveform or carrier bandwidth may be contained completely within another waveform or carrier bandwidth such as seen in system200-dofFIG. 2. This overlap still reflects partial overlap, as the two waveforms or carrier bandwidths do not completely coincide. In general, partial overlap can mean that the two or more waveforms or carrier bandwidths do not completely coincide (i.e., the carrier bandwidths are not the same).
• Some embodiments may utilize different definitions of overlap based on power spectrum density (PSD). For example, one definition of overlap based on PSD is shown in the following overlap equation for a first carrier:
• $\mathrm{overlap}=100\%*\frac{{\int }_0^{\infty }{\mathrm{<figure-callout\; label="PSD"\; filenames="US20130114571A1-20130509-D00006.png,US20130114571A1-20130509-D00007.png"\; state="\{\{state\}\}">PSD</figure-callout>}}_1\left(f\right)*{\mathrm{<figure-callout\; label="PSD"\; filenames="US20130114571A1-20130509-D00007.png"\; state="\{\{state\}\}">PSD</figure-callout>}}_2\left(f\right)}{{\int }_0^{\infty }{\mathrm{<figure-callout\; label="PSD"\; filenames="US20130114571A1-20130509-D00006.png,US20130114571A1-20130509-D00007.png"\; state="\{\{state\}\}">PSD</figure-callout>}}_1\left(f\right)*{\mathrm{<figure-callout\; label="PSD"\; filenames="US20130114571A1-20130509-D00006.png,US20130114571A1-20130509-D00007.png"\; state="\{\{state\}\}">PSD</figure-callout>}}_1\left(f\right)}.$
• In this equation, PSD₁(f) is the PSD for a first waveform or carrier bandwidth and PSD₂(f) is the PSD for a second waveform or carrier bandwidth. When the two waveforms or carrier bandwidths coincide, then the overlap equation may equal 100%. When the first waveform or carrier bandwidth and the second waveform or carrier bandwidth at least partially overlap, then the overlap equation may not equal 100%. For example, the Overlap Equation may result in a partial overlap of greater than or equal to 1%, 2%, 5%, and/or 10% in some embodiments. The overlap equation may result in a partial overlap of less than or equal to 99%, 98%, 95%, and/or 90% in some embodiments. One may note that in the case in which the first waveform or carrier bandwidth is a normal waveform or carrier bandwidth and the second waveform or a carrier waveform is a flexible waveform or carrier bandwidth that is contained within the normal bandwidth or carrier bandwidth, then the overlap equation may represent the ratio of the flexible bandwidth compared to the normal bandwidth, written as a percentage. Furthermore, the overlap equation may depend on which carrier bandwidth's perspective the overlap equation is formulated with respect to. Some embodiments may utilize other definitions of overlap. In some cases, another overlap may be defined utilizing a square root operation such as the following:
• $\mathrm{overlap}=100\%*\frac{{\int }_0^{\infty }{\mathrm{<figure-callout\; label="PSD"\; filenames="US20130114571A1-20130509-D00006.png,US20130114571A1-20130509-D00007.png"\; state="\{\{state\}\}">PSD</figure-callout>}}_1\left(f\right)*{\mathrm{<figure-callout\; label="PSD"\; filenames="US20130114571A1-20130509-D00007.png"\; state="\{\{state\}\}">PSD</figure-callout>}}_2\left(f\right)}{{\int }_0^{\infty }{\mathrm{<figure-callout\; label="PSD"\; filenames="US20130114571A1-20130509-D00006.png,US20130114571A1-20130509-D00007.png"\; state="\{\{state\}\}">PSD</figure-callout>}}_1\left(f\right)*{\mathrm{<figure-callout\; label="PSD"\; filenames="US20130114571A1-20130509-D00006.png,US20130114571A1-20130509-D00007.png"\; state="\{\{state\}\}">PSD</figure-callout>}}_1\left(f\right)}.$
• Other embodiments may utilize other overlap equations that may account for multiple overlapping carriers.
• FIG. 3 shows awireless communications system300 with a base station105-cand a mobile devices115-cand115d, in accordance with various embodiments. In some embodiments, the base station105-cmay be configured for coordinating forward link blanking and/or power boosting in normal and/or flexible carrier bandwidths. For example, transmissions305-aand/or305-bbetween the mobile device115-c/115-dand the base station105-amay utilize bandwidth of a flexible waveform that may overlap with the bandwidth of a normal waveform; other configurations are possible, such as partially overlapping normal waveforms or partially overlapping flexible waveforms. The base station105-cmay coordinate forward link blanking and/or power boosting that may aid in reducing the impact of interference. In some embodiments, the base station105-cmay coordinate with another base station (not shown) to coordinate forward link blanking and/or power boosting in a normal and/or flexible carrier bandwidths.
• Transmissions305-aand/or305-bbetween the mobile device115-c/115-dand the base station105-amay utilize flexible waveforms that may be generated to occupy less (or more) bandwidth than a normal waveform. For example, at a band edge, there may not be enough available spectrum to place a normal waveform. For a flexible waveform, as time gets dilated, the frequency occupied by a waveform goes down, thus making it possible to fit a flexible waveform into spectrum that may not be broad enough to fit a normal waveform. In some embodiments, the flexible waveform may be scaled utilizing a scaling factor N with respect to a normal waveform. Scaling factor N may take on numerous different values including, but not limited to, integer values such as 1, 2, 3, 4, 8, etc. N, however, does not have to be an integer.
• Some embodiments may utilize additional terminology. A new unit D may be utilized. The unit D is dilated. The unit is unitless and has the value of N. One can talk about time in the flexible system in terms of “dilated time”. For example, a slot ofsay 10 ms in normal time may be represented as 10D ms in flexible time (note: even in normal time, this will hold true since N=1 in normal time: D has a value of 1, so 10D ms=10 ms). In time scaling, one can replace most “seconds” with “dilated-seconds”. Note frequency in Hertz is 1/s.
• As discussed above, a flexible waveform may be a waveform that occupies less bandwidth than a normal waveform. Thus, in a flexible bandwidth system, the same number of symbols and bits may be transmitted over a longer duration compared to normal bandwidth system. This may result in time stretching, whereby slot duration, frame duration, etc., may increase by a scaling factor N. Scaling factor N may represent the ratio of the normal bandwidth to flexible bandwidth (BW). Thus, data rate in a flexible bandwidth system may equal (Normal Rater 1/N), and delay may equal (Normal Delay×N). In general, a flexible systems channel BW=channel BW of normal systems/N. Delay×BW may remain unchanged. Furthermore, in some embodiments, a flexible waveform may be a waveform that occupies more bandwidth than a normal waveform.
• Throughout this specification, the term normal system, subsystem, and/or waveform may be utilized to refer to systems, subsystems, and/or waveforms that involve embodiments that may utilize a scaling factor that may be equal to one (e.g., N=1) or a normal or standard chip rate. These normal systems, subsystems, and/or waveforms may also be referred to as standard and/or legacy systems, subsystems, and/or waveforms. Furthermore, flexible systems, subsystems, and/or waveforms may be utilized to refer to systems, subsystems, and/or waveforms that involve embodiments that may utilize a scaling factor that may be not equal to one (e.g., N=2, 4, 8, ½, ¼, etc). For N>1, or if a chip rate is decreased, the bandwidth of a waveform may decrease. Some embodiments may utilize scaling factors or chip rates that increase the bandwidth. For example, if N<1, or if the chip rate is increased, then a waveform may be expanded to cover bandwidth larger than a normal waveform. Flexible systems, subsystems, and/or waveforms may also be referred to as fractional systems, subsystems, and/or waveforms in some cases. Fractional systems, subsystems, and/or waveforms may or may not change bandwidth, for example. A fractional system, subsystem, or waveform may be flexible because it may offer more possibilities than a normal or standard system, subsystem, or waveform (e.g., N=1 system).
• A flexible waveform may include a waveform that occupies less bandwidth than a normal waveform (in some embodiments, a flexible waveform may include a waveform that occupies more bandwidth than a normal waveform). For example, at the band edge, there may not be enough available spectrum to place a normal waveform. Unlike normal waveforms, there can be partial or complete overlap between normal and flexible waveforms. It is to be noted that the flexible waveform may increase the system capacity. There can be a trade off between extent of overlap and the bandwidth of the flexible waveform. The overlap may create additional interference. Embodiments may be directed at methods, systems, and/or devices and be aimed at reducing the interference.
• Embodiments may utilize coordinated forward link blanking and/or power boosting in normal and/or flexible bandwidth systems. In some embodiments, the normal and/or flexible bandwidth systems are co-located. Scheduling can be done based on information about the other system. The normal and/or flexible bandwidth systems may be synchronized in the absolute time scale and/or or value of time offset is known a priori. In some situations, the normal bandwidth system is not highly loaded. In some situations, the traffic patterns of the normal and/or flexible bandwidth systems are not identical and therefore the peaks in the two systems are not aligned.
• In some embodiments, the flexible bandwidth system may have complete overlap with the normal bandwidth system. There may be partial overlap of the spectrum of flexible and normal bandwidth systems in some embodiments. For example, flexible waveform and normal waveform for C2K or UMTS may fully or partially overlap. In another example, two normal full waveforms for UMTS may partially overlap.
• Some embodiments may utilize a scaling factor with respect to different normal and/or flexible bandwidth systems. For example, the scaling factor for simpler implementations may utilize integer values such as N=1, 2, 4, 8, 16, etc. Other values of N that are not a power of 2 (or multiple of 2) may be utilized such that scheduling may still occur with regard to which slots to blank.FIG. 4 shows examples 400 of different frame structures of a normal bandwidth system and/or a flexible bandwidth system in accordance with various embodiments. For example, a normal bandwidth system (N=1) with data is shown inframe structure410. A normal bandwidth system (N=1) and with idle portions is shown in example420. Merely by way of example, an example420 of a frame structure for an N=2 flexible bandwidth system with data is also shown. Example420 shows how the frame structure may be stretched out by a factor of N=2 for this flexible bandwidth system.
• The use of blanking may result in a loss of system capacity. For example, blanking in one system may mean that no data scheduled for one or more slots in that system without affecting the QoS requirements of currently served mobiles to facilitate the transmission of some control or even data messages on the other system. It is to be noted that pilot and MAC transmission may still happen in those slots as in empty slots. It is also to be noted that the blanked slots in one system need not be contiguous as the transmission in the other system could be an interlaced transmission where every 4^thslot is used. For example, for a normal bandwidth system assisting 8 slot transmission for Control Channel in a flexible bandwidth system (N), 8*N slots every N CC Cycle in normal bandwidth system may need to be idle in normal bandwidth system may need to be idle. The loss in capacity may be equal to (0.8*N)/(16*16*N) (i.e., 1/32 or 3.125%, which may be independent of N). A loss in capacity can be absorbed in light- to medium-loaded systems. The loss value may be other than 3.125% if N is not a power of 2 (or multiple of 2). In some cases, one may want to have some threshold for overlap before blanking is utilized.
• The use of coordinated forward link blanking may have an impact on an application's quality of service (QoS) requirements. For example, consider a case where 1 frame in N=1 spans 26.67 msec and 1 slot spans 1.67 msec. Some applications (e.g., VoIP) might not be scheduled while meeting both the QoS requirements and the blanking schedule as they require low inter-packet delay. The impact of forward link blanking may be mitigated in some cases by having only high priority delay sensitive flows scheduled in the “blanked” slots. The impact of N comes in how often the blanking may need to be done in the assisting system. The impact of N may be represented in the span of time for which no traffic is scheduled for one blanking instance in the normal bandwidth system-assisting system (i.e., 8*N slots which may not be contiguous). Out of 8*N slots for the blanking duration, N slots may be contiguous. For higher N of the assisted system, this span may be more but it happens less frequently. For smaller N, this span may be less but it happens more frequently. For previous example (N=2), there may be loss of 0.5*2*16=16 slots frame every 2 CC cycles. In some cases, scheduling may deviate from the proportional fair scheduling during the duration of blanking.
• Coordinated forward link blanking may be enhanced in a variety of different ways. For example, the duration of blanking may be made minimal. This may include increasing the CC data rate in a flexible bandwidth system by using fewer slots for control overhead. For example, in one embodiment, one may use 76.8 kbpDs (i.e., 76.8/N kbps as CC data rate). Some embodiments may include power boosting to CC information in a flexible bandwidth system (e.g., transmit power is more than required for same transmit power density). This may offset the reduced reliability of a higher CC data rate in flexible bandwidth systems. the power boost may causeno additional interference to the normal bandwidth system as normal bandwidth system in already blanking. For example, consider a case where blanking is occurring with regard to the normal bandwidth system. Power boosting can be disabled if high priority, delay sensitive flows have to be scheduled in the normal bandwidth system during blanking. Also, in some embodiments, more power may be utilized on normal bandwidth system at other times to compensate for blanking.FIG. 5 shows an example500 of transmission blanking on anormal bandwidth system510 coordinated with control channel transmissions on aflexible bandwidth system520 in accordance with various embodiments. In this example, N=2 for the flexible bandwidth system. As shown with thenormal bandwidth system510, one or more idle slots due to transmission blanking515-a/515-boccurs when control transmission525-a/525-boccurs for theflexible bandwidth system520. Also shown in example500 isuser data channel530 and control channel535-a/535-b/535-cfor thenormal bandwidth system510, and user data channel540 for theflexible bandwidth system520. Other embodiments may utilize different frames or portions of a slot to transmit control channel and/or user data channel information. As shown inFIG. 5, 16 slots make 1 frame and 16 such frames (i.e., 16*16=256 slots) make one control channel (CC) cycle. Other embodiments may utilize different numbers of slots per control channel (CC) cycle, different timings, and/or different scaling factors.
• Some embodiments may utilize soft blanking on the normal bandwidth system (or flexible bandwidth systems in some cases) as mentioned above. Soft blanking may include situations where a base station, for example, may not be completely silent as in hard blanking in the data portion of the slots but where the base station may transmit less than what the base station would have in the absence of soft blanking, for example. Soft blanking may include transmissions of at least a priority flow or a delay sensitive flow over at least a portion of the blanking duration. Soft blanking may include reducing a power of transmission. In addition to priority or delay sensitive flows, for example, other flows can be scheduled in the “blanked” slots on normal bandwidth systems. In some cases, those flows can be sent with lowered power (on the normal bandwidth system). This may be suitable to serve mobile devices with better channel conditions. In some embodiments, even with hard blanking, pilot and/or MAC transmissions might be present.
• For collocated systems, where load information of the first and second bandwidth systems may be available to a scheduler, the blanking may be done at a finer granularity, such as at the slot level. The blanking could be triggered by a request response procedure where the second bandwidth system that may require help may send a request to the first bandwidth system and the latter may respond with an acknowledgement or rejects citing a reason, for example.
• Some embodiments may utilize non co-located flexible and normal bandwidth systems. The granularity of blanking may be relatively coarser for non-collocated systems if the relative load information is not shared. For example, blanking can be done at pre-scheduled times of day. This may assume that the peaks in both systems do not happen at the same time due to different traffic distributions. A flexible non co-located base station, for example, can request normal bandwidth base stations to blank at a certain time or times when it may want to send data to a mobile device far away.
• Embodiments may provide several advantages. For example, blanking in a normal bandwidth system may provide more reliability to CC transmissions or other transmissions in flexible bandwidth systems as there may be no scheduled flow in the normal bandwidth system. Power boosting to a flexible CC transmission may enable flexible bandwidth system's CC transmission at higher rates thereby using fewer slots without lowering reliability and/or enhanced reliability of CC if CC data rate is kept the same. Power boosting also may not cause interference to a normal bandwidth system if the normal bandwidth system is blanking. Blanking and power boost can be applied also at the same time or at different times.
• Some embodiments may include blanking in the flexible bandwidth system. Blanking in a flexible bandwidth system can be done to reduce interference on the normal bandwidth system. For a flexible bandwidth system (N) assisting 8 slot transmission for control channel in a normal bandwidth system, (0.5*16) slots every CC Cycle (i.e., 16*16 slots) in flexible bandwidth system may need to be idle. The loss in capacity is again (0.5*16)/(16*16) (i.e., 1/32 or 3.125%, which may be independent of N). Thus loss of system capacity may be the same if seen with blanking for a normal bandwidth system discussed above. It is to be noted that when the assisting system is flexible (N) and assisted system is normal, then to assist1 slot transmission, 1/N slot needs to be blanked. The effective loss in system capacity may be higher if less than 1 slot cannot be blanked. If a normal and a flexible bandwidth system's peak loads are not time aligned, there can be alternating periods of blanking in the normal system, followed by blanking in the flexible system and so on. In some embodiments, the flexible bandwidth system may transmit with more power (if available headroom) for some time to compensate for blanking.
• The blanking can be extended beyond control channel (CC) transmissions (i.e., can be applied for data transmissions). The loss in system capacity in the assisting system may depend on how many slots are blanked. Blanking and/or power boosting for data can be done opportunistically. For example, blanking may be utilized without power boosting. When there is less traffic on one system; that system can manage its traffic slot allocations such that it can just blank for some time and transmit all its traffic in a bursty manner for some other time. The other system can transmit with higher data rates during the blanking slots of the first system since there will be less interference.
• Power boosting may be utilized without blanking in some cases. For example, when the mobile devices served by the system with regular power are known to be close to the base station and can tolerate additional interference, then the other system can boost its power to serve its mobile devices with more power, hence this may result in higher data rates. One potential problem may be interference to other cells. This can be solved by coordination with other cells. If similar conditions exist in the neighboring cells, then the additional interference may be tolerated in some situations. Other cells may let this cell boost its power to a certain level in some situations. The power boost may be a function of different factors. For example, the power boost may be a function of the intra-cell and/or inter-cell interference factors. In one embodiment, the power boost may be equal, but is not limited, to: min {power boost possible without causing problem to the first system (intra cell), power boost possible without causing problem to other cells of both systems (inter cell)}.
• Blanking and power boosting may be utilized at the same time. When there is less traffic on one system, that system can manage its traffic slot allocations such that it can just blank for some time and transmit all its traffic in a bursty manner for some other time. The other system can increase its power output without causing any problems to the other cells of the first system at least to the point where its power is equivalent to the sum of the original powers of two systems for a fully overlapping spectrum allocation for the two systems. For partial allocation, the ratio of overlap may be taken into consideration. The other system may need to coordinate with other cells of its system for how much it can boost its power.
• In some embodiments, instead of a transmitter stopping transmissions for blanking, it can lower its power. Since the interference levels may be changed as a result, calculations for data rates and power boost may have to be taken into consideration.
• Blanking and/or power boosting tools and techniques discussed herein can be extended to two normal systems or two flexible systems operating in the same frequency (i.e., non co-located). Merely by way of example, the two flexible systems may include a first factional system with a scaling factor N=2 and a second flexible system with a scaling factor N=4; in this example the two systems may help each other due to the relationship between the two scaling factors. Embodiments may be extended to TDD systems where normal blanking during flexible transmission occurs at the same time or vice versa either at uplink or forward link.
• In some embodiments, data blanking in one system may occur for data transmission in the other system. Data blanking in one system may occur for control transmission in the other system. Control blanking in one system may occur for data transmission in the other system. Control blanking in one system may occur for control transmission in the other system.
• Turning next toFIG. 6, a block diagram illustrates adevice600 that includes interference reduction functionality in accordance with various embodiments. Thedevice600 may be an example of aspects of thebase stations105 ofFIG. 1,FIG. 2,FIG. 3,FIG. 8, and/orFIG. 9. Thedevice600 may also be a processor. Thedevice600 may also be a processor. Thedevice600 may include areceiver module605, apower boosting module610, ablanking module615, and/or atransmitter module620. Each of these components may be in communication with each other.
• These components of thedevice600 may, individually or collectively, be implemented with one or more application-specific integrated circuits (ASICs) adapted to perform some or all of the applicable functions in hardware. Alternatively, the functions may be performed by one or more other processing units (or cores), on one or more integrated circuits. In other embodiments, other types of integrated circuits may be used (e.g., Structured/Platform ASICs, Field Programmable Gate Arrays (FPGAs), and other Semi-Custom ICs), which may be programmed in any manner known in the art. The functions of each unit may also be implemented, in whole or in part, with instructions embodied in a memory, formatted to be executed by one or more general or application-specific processors.
• Thereceiver module605 may receive information such as packet, data, and/or signaling information regarding whatdevice600 has received or transmitted. The received information may be utilized by thepower boosting module610 and/or blankingmodule615 for a variety of purposes.
• Thereceiver module605 may be configured to identify multiple carrier bandwidths, such as first carrier bandwidth and a second carrier bandwidth of the wireless communications system. The first carrier bandwidth may at least partially overlap the second carrier bandwidth. Theblanking module615 may utilize the carrier bandwidth information from thereceiver module605 to coordinate a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.
• In some embodiments, theblanking module615 may coordinate the transmission blanking over the first carrier bandwidth such that it occurs during a control channel transmission over the second carrier bandwidth. Theblanking module615 may determine a timing of the control channel transmission over the second carrier bandwidth and coordinate the transmission blanking based on the determined timing of the control channel transmission over the second carrier bandwidth. Theblanking module615 may coordinate the transmission blanking over the first carrier bandwidth such that it occurs during a data transmission over the second carrier bandwidth. Theblanking module615 may determine aspects about the data transmission over the second carrier bandwidth, such as when the data transmission may occur and/or an amount data to be transmitted. Theblanking module615 may coordinate the transmission blanking such that it occurs during the data transmission over the second carrier bandwidth. In some embodiments, the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidths is changed based on at least a time of day or a load of the forward link.
• The transmission blanking coordinated by theblanking module615 over the first carrier bandwidth and the concurrent transmission over the second carrier may be co-located. The coordinated transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier bandwidth may not be co-located. The coordinated transmission blanking over the first carrier bandwidth may occur at a pre-scheduled time. The transmission blanking over the first carrier bandwidth coordinated by theblanking module615 and the concurrent transmission over the second carrier may be synchronized with respect to an absolute time or known time offset.
• In some embodiments, the first carrier bandwidth is a flexible bandwidth and the second carrier bandwidth is a normal bandwidth. In some embodiments, the first carrier bandwidth is a first flexible bandwidth and the second carrier bandwidth is a second flexible bandwidth. In some embodiments, the first carrier bandwidth is a normal bandwidth and the second carrier bandwidth is a flexible bandwidth. In some embodiments, the first carrier bandwidth is a first normal bandwidth and the second carrier bandwidth is a second normal bandwidth. In some embodiments, the first carrier bandwidth may fully overlap the second carrier bandwidth, such as when a flexible bandwidth carrier is fully overlapped by a normal carrier bandwidth. Some embodiments may be extended to additional carrier bandwidths, such as a third bandwidth carrier.
• In some embodiments, at least the first carrier bandwidth or the second carrier bandwidth utilizes licensed spectrum. In some embodiments, the first carrier bandwidth and the second carrier bandwidth utilize different radio access technologies (RATs). For example, in one embodiment, the first carrier bandwidth utilizes LTE, while the second carrier bandwidth utilizes EV-DO, or vice versa.
• Theblanking module615 may be configured to generate transmission blanking that includes hard blanking. Hard blanking may include now flow being scheduled for transmission during the period of transmission blanking. Theblanking module615 may generate transmission blanking that includes soft blanking. Soft blanking may include transmissions of at least a priority flow or a delay sensitive flow during the period of transmission blanking. Soft blanking may include reducing a power of transmission. Coordinated soft transmission blanking may include transmissions during a portion of the coordinated soft transmission blanking less than an entire period of the coordinated soft transmission blanking.
• Some embodiments may further include configuring thereceiver module605 to identify a third carrier bandwidth different than the second carrier bandwidth that at least partially overlaps the first carrier bandwidth of the wireless communications system. Theblanking module615 may coordinate a transmission blanking on the forward link over the first carrier bandwidth during a concurrent transmission over the third carrier bandwidth. This use of a third or more carrier bandwidths may be referred to as multi-carrier embodiments. These multi-carrier embodiments can be co-located or at a different location. For example, if co-located, blanking may not be utilized for the close by mobile device, while blanking may occur for a mobile device further away. If service is needed for both the close and far away mobile devices, the close mobile device may be placed on the smaller carrier bandwidth and blanked since it can take the lower signal to reduce the interference for the mobile device further away.
• Thepower boosting module610 may be configured to increase a power of transmission over the second carrier bandwidth during the transmission blanking over the first carrier bandwidth. In some embodiments, the power increase and the transmission blanking are applied independently. In some embodiments, the power increase and the transmission blanking are applied together. In some embodiments, the power increase and the transmission blanking are activated in co-located systems. In some embodiments, the power increase and the transmission blanking are activated in co-located systems based on the load of the co-located systems. The coordinated transmission blanking over the first carrier bandwidth may occur at a slot level. Some embodiments include increasing at least a data rate of at least a control channel or data channel utilizing the power increase over the second carrier bandwidth. Some embodiments include increasing a power of transmission over the first carrier bandwidth during a period of time different than the coordinated transmission blanking over the first carrier bandwidth. Coordinating the concurrent transmission over the second carrier bandwidth may occur during one or more slots when the first carrier bandwidth is not transmitting. In some embodiments, at least coordinating a transmission blanking on the forward link over the second carrier bandwidth during the concurrent transmission over the first carrier bandwidth or increasing the power of transmission over the first carrier bandwidth during the coordinated transmission blanking on the forward link over the second carrier bandwidth depends at least upon a relative loading of the first carrier bandwidth with respect to the second carrier bandwidth or time of day.
• In some embodiments, thepower boosting module610 may be further configured to increase transmission power over the first carrier bandwidth and/or the second carrier bandwidth such that these bandwidths are not be not co-located. In some embodiments, thepower boosting module610 may be further configured such that the transmission power increase may occur at a pre-scheduled time in some embodiments. Some embodiments may further include thereceiver module605 being configured to receive a request from the second carrier bandwidth to coordinate the transmission power increase at a specific time. In some embodiments, the first carrier bandwidth system may agree to accommodate the request from the second carrier bandwidth; in some cases, the first carrier bandwidth may send an acknowledgement or agreement message.
• Some embodiments may further include configuring thereceiver module605 to identify a third carrier bandwidth and the second carrier bandwidth of the wireless communications system where the second carrier bandwidth at least partially overlaps the third carrier bandwidth. Thepower boosting module610 may coordinate a transmission power increase for a forward link over the third carrier bandwidth with respect to the second carrier bandwidth.
• Some embodiments ofpower boosting module610 and/or theblanking module615 may be further configured to at least coordinate a transmission blanking on a forward link over the second carrier bandwidth during a concurrent transmission over the first carrier bandwidth or increase a power of transmission over the first carrier bandwidth during the transmission blanking over the second carrier bandwidth. At least coordinating the transmission blanking on the forward link over the second carrier bandwidth during the concurrent transmission over the first carrier bandwidth, increasing the power of transmission over the first carrier bandwidth during the transmission blanking over the second carrier bandwidth, coordinating the transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth, or increasing the power of transmission over the second carrier bandwidth during the transmission blanking over the first carrier bandwidth may change based on at least a time of day or a loading of at least one of the forward links.
• The transmission blanking coordinated by theblanking module615 over the first carrier bandwidth and the concurrent transmission over the second carrier may not be co-located in some cases. Theblanking module615 may coordinate the transmission blanking such that it occurs at a pre-scheduled time. In some embodiments, thereceiver module605 may be configured to receive a request to coordinate the transmission blanking at a specific time.
• In some embodiments, thepower boosting module610 may coordinate a transmission power increase over a first carrier bandwidth with respect to a second carrier bandwidth. The first carrier bandwidth may partially overlap the second carrier bandwidth. Some embodiments may further include thepower boosting module610 coordinating with theblanking module615 such that a transmission blanking occurs over the second carrier bandwidth during a concurrent transmission over the first carrier bandwidth. The concurrent transmission over the first carrier bandwidth may occur during the transmission power increase. In some embodiments, thepower boosting module610 may determine at least a time of day or a loading of the forward link; thepower boosting module610 may coordinate the transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth changes based on at least the determined time of day or the determined loading of the forward link.
• In some embodiments, the first carrier bandwidth is a flexible bandwidth and the second carrier bandwidth is a normal bandwidth. In some embodiments, the first carrier bandwidth is a first flexible bandwidth and the second carrier bandwidth is a second flexible bandwidth. In some embodiments, the first carrier bandwidth is a normal bandwidth and the second carrier bandwidth is a flexible bandwidth. In some embodiments, the first carrier bandwidth is a first normal bandwidth and the second carrier bandwidth is a second normal bandwidth.
• In some embodiments, theblanking module615 and/or thereceiver module605 may be configured to receive the coordinated transmission blanking on the forward link over the first carrier bandwidth and/or the concurrent transmission over the second carrier bandwidth. Theblanking module615 and/or thereceiver module605 may be configured to receive the variations related to coordinated transmission blanking and/or concurrent transmissions as discussed above with respect todevice600. In some embodiments, thepower boosting module610 and/orreceiver module605 may be configured to receive the increased transmission power over one carrier bandwidth during the transmission blanking over another carrier bandwidth. Thepower boosting module615 and/or thereceiver module605 may be configured to receive the variations related to increased power transmission as discussed above with respect todevice600.
• FIG. 7 is a block diagram700 of a mobile device115-econfigured to facilitate the use of flexible bandwidth in accordance with various embodiments. The mobile device115-emay have any of various configurations, such as personal computers (e.g., laptop computers, netbook computers, tablet computers, etc.), cellular telephones, PDAs, digital video recorders (DVRs), internet appliances, gaming consoles, e-readers, etc. The mobile device115-emay have an internal power supply (not shown), such as a small battery, to facilitate mobile operation. In some embodiments, the mobile device115-emay be themobile device115 ofFIG. 1,FIG. 2,FIG. 3,FIG. 8, and/orFIG. 9, and/or thedevice600 ofFIG. 6. The mobile device115-emay be a multi-mode mobile device. The mobile device115-emay be referred to as a wireless communications device in some cases.
• The mobile device115-emay includeantennas740, atransceiver module750,memory780, and a processor module770, which each may be in communication, directly or indirectly, with each other (e.g., via one or more buses). Thetransceiver module750 is configured to communicate bi-directionally, via theantennas740 and/or one or more wired or wireless links, with one or more networks, as described above. For example, thetransceiver module750 may be configured to communicate bi-directionally withbase stations105 ofFIG. 1,FIG. 2,FIG. 3,FIG. 8, and/orFIG. 9. Thetransceiver module750 may include a modem configured to modulate the packets and provide the modulated packets to theantennas740 for transmission, and to demodulate packets received from theantennas740. While the mobile device115-emay include a single antenna, the mobile device115-ewill typically includemultiple antennas740 for multiple links.
• Thememory780 may include random access memory (RAM) and read-only memory (ROM). Thememory780 may store computer-readable, computer-executable software code785 containing instructions that are configured to, when executed, cause the processor module770 to perform various functions described herein (e.g., call processing, database management, message routing, etc.). Alternatively, the software785 may not be directly executable by the processor module770 but be configured to cause the computer (e.g., when compiled and executed) to perform functions described herein.
• The processor module770 may include an intelligent hardware device, e.g., a central processing unit (CPU) such as those made by Intel® Corporation or AMD®, a microcontroller, an application-specific integrated circuit (ASIC), etc. The processor module770 may include a speech encoder (not shown) configured to receive audio via a microphone, convert the audio into packets (e.g., 30 ms in length) representative of the received audio, provide the audio packets to thetransceiver module750, and provide indications of whether a user is speaking. Alternatively, an encoder may only provide packets to thetransceiver module750, with the provision or withholding/suppression of the packet itself providing the indication of whether a user is speaking.
• According to the architecture ofFIG. 7, the mobile device115-emay further include acommunications management module760. Thecommunications management module760 may manage communications with othermobile devices115. By way of example, thecommunications management module760 may be a component of the mobile device115-ein communication with some or all of the other components of the mobile device115-evia a bus. Alternatively, functionality of thecommunications management module760 may be implemented as a component of thetransceiver module750, as a computer program product, and/or as one or more controller elements of the processor module770.
• The components for mobile device115-emay be configured to implement aspects discussed above with respect todevice600 inFIG. 6 and may not be repeated here for the sake of brevity. The power boosting module610-amay be thepower boosting module610 ofFIG. 6. The forward link blanking module615-amay be the blankingmodule615 ofFIG. 6. In some embodiments, the blanking module615-aand/or other components of device115-emay be configured to receive the coordinated transmission blanking on the forward link over the first carrier bandwidth and/or the concurrent transmission over the second carrier bandwidth. The blanking module615-aand/or other components of device115-emay be configured to receive the variations related to coordinated transmission blanking and/or concurrent transmissions as discussed above with respect todevice600. In some embodiments, the power boosting module610-aand/or other components of device115-emay be configured to receive the increased transmission power over one carrier bandwidth during the transmission blanking over another carrier bandwidth. The power boosting module610-aand/or other components of device115-emay be configured to receive the variations related to increased power transmission as discussed above with respect todevice600.
• The mobile device115-emay also include aspectrum identification module715. Thespectrum identification module715 may be utilized to identify spectrum available for flexible waveforms. In some embodiments, ahandover module725 may be utilized to perform handover procedures of the mobile device115-efrom one base station to another. For example, thehandover module725 may perform a handover procedure of the mobile device115-efrom one base station to another where normal waveforms are utilized between the mobile device115-eand one of the base stations and flexible waveforms are utilized between the mobile device and another base station. Ascaling module710 may be utilized to scale and/or alter chip rates to generate flexible waveforms.
• In some embodiments, thetransceiver module750, in conjunction withantennas740, along with other possible components of mobile device115-e, may transmit information regarding flexible waveforms and/or scaling factors from the mobile device115-eto base stations or a core network. In some embodiments, thetransceiver module750, in conjunction withantennas740, along with other possible components of mobile device115-e, may transmit information, such flexible waveforms and/or scaling factors, to base stations or a core network such that these devices or systems may utilize flexible waveforms.
• FIG. 8 shows a block diagram of acommunications system800 that may be configured for utilizing flexible waveforms in accordance with various embodiments. Thissystem800 may be an example of aspects of thesystem100 depicted inFIG. 1,systems200 ofFIG. 2,system300 ofFIG. 3, and/orsystem900 ofFIG. 9. The base station105-emay includeantennas845, atransceiver module850,memory870, and a processor module865, which each may be in communication, directly or indirectly, with each other (e.g., over one or more buses). Thetransceiver module850 may be configured to communicate bi-directionally, via theantennas845, with the mobile device115-f, which may be a multi-mode mobile device. The transceiver module850 (and/or other components of the base station105-e) may also be configured to communicate bi-directionally with one or more networks. In some cases, the base station105-emay communicate with the network130-aand/or controller120-athrough network communications module875. Base station105-emay be an example of an eNodeB base station, a Home eNodeB base station, a NodeB base station, and/or a Home NodeB base station. Controller120-amay be integrated into base station105-ein some cases, such as with an eNodeB base station.
• Base station105-emay also communicate withother base stations105, such as base station105-mand base station105-n. Each of thebase stations105 may communicate with mobile device115-fusing different wireless communications technologies, such as different Radio Access Technologies. In some cases, base station105-emay communicate with other base stations such as105-mand/or105-nutilizing basestation communication module815. In some embodiments, basestation communication module815 may provide an X2 interface within an LTE wireless communication technology to provide communication between some of thebase stations105. In some embodiments, base station105-emay communicate with other base stations through controller120-aand/or network130-a.
• Thememory870 may include random access memory (RAM) and read-only memory (ROM). Thememory870 may also store computer-readable, computer-executable software code871 containing instructions that are configured to, when executed, cause the processor module865 to perform various functions described herein (e.g., call processing, database management, message routing, etc.). Alternatively, thesoftware871 may not be directly executable by the processor module865 but be configured to cause the computer, e.g., when compiled and executed, to perform functions described herein.
• The processor module865 may include an intelligent hardware device, e.g., a central processing unit (CPU) such as those made by Intel® Corporation or AMD®, a microcontroller, an application-specific integrated circuit (ASIC), etc. The processor module865 may include a speech encoder (not shown) configured to receive audio via a microphone, convert the audio into packets (e.g., 30 ms in length) representative of the received audio, provide the audio packets to thetransceiver module850, and provide indications of whether a user is speaking. Alternatively, an encoder may only provide packets to thetransceiver module850, with the provision or withholding/suppression of the packet itself providing the indication of whether a user is speaking.
• Thetransceiver module850 may include a modem configured to modulate the packets and provide the modulated packets to theantennas845 for transmission, and to demodulate packets received from theantennas845. While some examples of the base station105-emay include asingle antenna845, the base station105-epreferably includesmultiple antennas845 for multiple links which may support carrier aggregation. For example, one or more links may be used to support macro communications with mobile device115-f.
• According to the architecture ofFIG. 8, the base station105-emay further include acommunications management module830. Thecommunications management module830 may manage communications withother base stations105. By way of example, thecommunications management module830 may be a component of the base station105-ein communication with some or all of the other components of the base station105-evia a bus. Alternatively, functionality of thecommunications management module830 may be implemented as a component of thetransceiver module850, as a computer program product, and/or as one or more controller elements of the processor module865.
• The components for base station105-emay be configured to implement aspects discussed above with respect todevice600 inFIG. 6 and may not be repeated here for the sake of brevity. The power boosting module610-bmay be thepower boosting module610 ofFIG. 6. The forward link blanking module615-bmay be the blankingmodule615 ofFIG. 11.
• The base station105-emay also include aspectrum identification module815. Thespectrum identification module815 may be utilized to identify spectrum available for flexible waveforms. In some embodiments, ahandover module825 may be utilized to perform handover procedures of the mobile device115-ffrom onebase station105 to another. For example, thehandover module825 may perform a handover procedure of the mobile device115-ffrom base station105-eto another where normal waveforms are utilized between the mobile device115-fand one of the base stations and flexible waveforms are utilized between the mobile device and another base station. Ascaling module810 may be utilized to scale and/or alter chip rates to generate flexible waveforms.
• In some embodiments, thetransceiver module850 in conjunction withantennas845, along with other possible components of base station105-e, may transmit information regarding flexible waveforms and/or scaling factors from the base station105-eto the mobile device115-f, to other base stations105-m/105-n, or core network130-a. In some embodiments, thetransceiver module850 in conjunction withantennas845, along with other possible components of base station105-e, may transmit information to the mobile device115-f, to other base stations105-m/105-n, or core network130-a, such as flexible waveforms and/or scaling factors, such that these devices or systems may utilize flexible waveforms.
• FIG. 9 is a block diagram of asystem900 including a base station105-fand a mobile device115-gin accordance with various embodiments. Thissystem900 may be an example of thesystem100 ofFIG. 1,systems200 ofFIG. 2,system300 ofFIG. 3, and/orsystem800 ofFIG. 8. The base station105-fmay be equipped with antennas934-athrough934-x, and the mobile device115-gmay be equipped with antennas952-athrough952-n. At the base station105-f, a transmitprocessor920 may receive data from a data source.
• The transmitprocessor920 may process the data. The transmitprocessor920 may also generate reference symbols, and a cell-specific reference signal. A transmit (TX)MIMO processor930 may perform spatial processing (e.g., precoding) on data symbols, control symbols, and/or reference symbols, if applicable, and may provide output symbol streams to the transmit modulators932-athrough932-x. Eachmodulator932 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Eachmodulator932 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink (DL) signal. In one example, DL signals from modulators932-athrough932-xmay be transmitted via the antennas934-athrough934-x, respectively. Thetransmitter processor920 may receive information from aprocessor940. Theprocessor940 may be coupled with amemory942. Theprocessor940 may be configured to generate flexible waveforms through altering a chip rate and/or utilizing a scaling factor. In some embodiments, theprocessor module940 may be configured for coordinating forward link blanking and/or power boosting in normal and/or flexible bandwidth systems. For example, transmissions between mobile device115-gand base station105-fmay utilize bandwidth of a flexible waveform that may overlap with the bandwidth of a normal waveform. Theprocessor940 may coordinate forward link blanking and/or power boosting that may aid in reducing the impact of this interference.
• At the mobile device115-g, the mobile device antennas952-athrough952-nmay receive the DL signals from the base station105-fand may provide the received signals to the demodulators954-athrough954-n, respectively. Eachdemodulator954 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Eachdemodulator954 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. AMIMO detector956 may obtain received symbols from all the demodulators954-athrough954-n, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receiveprocessor958 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, providing decoded data for the mobile device115-gto a data output, and provide decoded control information to aprocessor980, ormemory982.
• On the uplink (UL) or reverse link, at the mobile device115-g, atransmitter processor964 may receive and process data from a data source. Thetransmitter processor964 may also generate reference symbols for a reference signal. The symbols from thetransmitter processor964 may be precoded by a transmitMIMO processor966 if applicable, further processed by the demodulators954-athrough954-n(e.g., for SC-FDMA, etc.), and be transmitted to the base station105-fin accordance with the transmission parameters received from the base station105-E Thetransmitter processor964 may also be configured to generate flexible waveforms through altering a chip rate and/or utilizing a scaling factor; this may be done dynamically in some cases. The transmitprocessor964 may receive information fromprocessor980. Theprocessor980 may provide for different alignment and/or offsetting procedures. Theprocessor980 may also utilize scaling and/or chip rate information to perform measurements on the other subsystems, perform handoffs to the other subsystems, perform reselection, etc. Theprocessor980 may invert the effects of time stretching associated with the use of flexible bandwidth through parameter scaling. At the base station105-f, the UL signals from the mobile device115-gmay be received by theantennas934, processed by thedemodulators932, detected by aMIMO detector936 if applicable, and further processed by a receive processor. The receiveprocessor938 may provide decoded data to a data output and to theprocessor980. In some embodiments, theprocessor980 may be implemented as part of a general processor, thetransmitter processor964, and/or thereceiver processor958.
• In some embodiments, theprocessor980 may be configured to receive coordinated forward link blanking and/or power boosting in normal and/or flexible bandwidth systems. For example, transmissions between mobile device115-gand base station105-fmay utilize bandwidth of a flexible waveform that may overlap with the bandwidth of a normal waveform. Theprocessor940 may be configured to receive coordinated forward link blanking and/or power boosting that may aid in reducing the impact of this interference.
• Turning toFIG. 10A, a flow diagram of a method1000-afor reducing interference within a wireless communications system in accordance with various embodiments. Method1000-amay be implemented utilizing various wireless communications devices including, but not limited to: amobile device115 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 7,FIG. 8, and/orFIG. 9; abase station105 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 8, orFIG. 9; acore network130 orcontroller120 as seen inFIG. 1 and/orFIG. 8; and/or adevice600 ofFIG. 6.
• Atblock1005, a first carrier bandwidth and a second carrier bandwidth of the wireless communications system may be identified. The first carrier bandwidth may partially at least overlap the second carrier bandwidth. Atblock1010, a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth may be coordinated.
• In some embodiments, the transmission blanking over the first carrier bandwidth may occur during a control channel transmission over the second carrier bandwidth. A timing of the control channel transmission over the second carrier bandwidth may be determined and coordinating the transmission blanking may be based on the determined timing of the control channel transmission over the second carrier bandwidth. In some embodiments, the transmission blanking over the first carrier bandwidth may occur during a data transmission over the second carrier bandwidth. Aspects of the data transmission over the second carrier bandwidth may be determined, such as when the data transmission may occur and/or an amount data to be transmitted. The determined information may be utilized to coordinate the transmission blanking such that it occurs during the data transmission over the second carrier bandwidth. In some embodiments, the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidths is changed based on at least a time of day or a load of the forward link.
• The transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier may be co-located. The coordinated transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier bandwidth may not be co-located. The coordinated transmission blanking over the first carrier bandwidth may occur at a pre-scheduled time. The transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier may be synchronized with respect to an absolute time or known time offset.
• In some embodiments, the first carrier bandwidth is a flexible bandwidth and the second carrier bandwidth is a normal bandwidth. In some embodiments, the first carrier bandwidth is a first flexible bandwidth and the second carrier bandwidth is a second flexible bandwidth. In some embodiments, the first carrier bandwidth is a normal bandwidth and the second carrier bandwidth is a flexible bandwidth. In some embodiments, the first carrier bandwidth is a first normal bandwidth and the second carrier bandwidth is a second normal bandwidth. In some embodiments, the first carrier bandwidth may fully overlap the second carrier bandwidth, such as when a flexible bandwidth carrier is fully overlapped by a normal carrier bandwidth.
• In some embodiments, at least the first carrier bandwidth or the second carrier bandwidth utilizes licensed spectrum. In some embodiments, the first carrier bandwidth and the second carrier bandwidth utilize different radio access technologies (RATs). For example, in one embodiment, the first carrier bandwidth utilizes LTE, while the second carrier bandwidth utilizes EV-DO.
• In some embodiments, the transmission blanking may include hard blanking. Hard blanking may include no flow being scheduled for transmission during the period of transmission blanking. The transmission blanking may include soft blanking. Soft blanking may include transmissions of at least a priority flow or a delay sensitive flow during the period of transmission blanking. Soft blanking may include reducing a power of transmission during the period of transmission blanking. Coordinated soft transmission blanking may include transmissions during a portion of the coordinated soft transmission blanking less than an entire period of the coordinated soft transmission blanking.
• Some embodiments of method1000-amay further include increasing a power of transmission over the second carrier bandwidth during the transmission blanking over the first carrier bandwidth. In some embodiments, the power increase and the transmission blanking are applied independently. In some embodiments, the power increase and the transmission blanking are applied together. In some embodiments, the power increase and the transmission blanking are activated in co-located systems. In some embodiments, the power increase and the transmission blanking are activated in co-located systems based on the load of the co-located systems. The coordinated transmission blanking over the first carrier bandwidth may occur at a slot level. Some embodiments include increasing at least a data rate of at least a control channel or data channel utilizing the power increase over the second carrier bandwidth. Some embodiments include increasing a power of transmission over the first carrier bandwidth during a period of time different than the coordinated transmission blanking over the first carrier bandwidth. Coordinating the concurrent transmission over the second carrier bandwidth may occur during one or more slots when the first carrier bandwidth is not transmitting. In some embodiments, at least coordinating a transmission blanking on the forward link over the second carrier bandwidth during the concurrent transmission over the first carrier bandwidth or increasing the power of transmission over the first carrier bandwidth during the coordinated transmission blanking on the forward link over the second carrier bandwidth depends at least upon a relative loading of the first carrier bandwidth with respect to the second carrier bandwidth or time of day.
• Some embodiments of method1000-amay further include at least coordinating a transmission blanking on a forward link over the second carrier bandwidth during a concurrent transmission over the first carrier bandwidth or increasing a power of transmission over the first carrier bandwidth during the transmission blanking over the second carrier bandwidth. At least coordinating the transmission blanking on the forward link over the second carrier bandwidth during the concurrent transmission over the first carrier bandwidth, increasing the power of transmission over the first carrier bandwidth during the transmission blanking over the second carrier bandwidth, coordinating the transmission blanking on the forward link over the second carrier bandwidth during the concurrent transmission over the first carrier bandwidth, or increasing the power of transmission over the first carrier bandwidth during the transmission blanking over the second carrier bandwidth may change based on at least a time of day or a loading of at least one of the forward links.
• Some embodiments may include identifying a third carrier bandwidth different than the second carrier bandwidth that at least partially overlaps the first carrier bandwidth of the wireless communications system. A transmission blanking on the forward link over the first carrier bandwidth may be coordinated with respect to a concurrent transmission over the third carrier bandwidth. This use of a third or more carrier bandwidths may be referred to as multi-carrier embodiments. These multi-carrier embodiments can be co-located or at a different location. For example, if co-located, blanking may not be utilized for the close by mobile device, while blanking may occur for a mobile device further away. If service is needed for both the close and far away mobile devices, the close mobile device may be placed on the smaller carrier bandwidth and blanked since it can take the lower signal to reduce the interference for the mobile device further away.
• The transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier may not be co-located in some cases. The transmission blanking may occur at a pre-scheduled time. Some embodiments may further include receiving a request from the second carrier bandwidth to coordinate the transmission blanking at a specific time. In some embodiments, the first carrier bandwidth system may agree to accommodate the request from the second carrier bandwidth; in some cases, the first carrier bandwidth may send an acknowledgement or agreement message.
• Method1000-amay be implemented by a base station in some embodiments. In some embodiments, the wireless communications system includes a time division multiplexing system.
• Turning toFIG. 10B, a flow diagram of a method1000-bfor reducing interference within a wireless communications system in accordance with various embodiments. Method1000-bmay be implemented utilizing various wireless communications devices including, but not limited to: amobile device115 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 7,FIG. 8, and/orFIG. 9; abase station105 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 8, orFIG. 9; acore network130 orcontroller120 as seen inFIG. 1 and/orFIG. 8; and/or adevice600 ofFIG. 6. Method1000-bmay be an example of method1000-aofFIG. 10A.
• At block1005-a, a normal carrier bandwidth and a flexible carrier bandwidth of the wireless communications system may be identified. The normal carrier bandwidth may partially overlap the flexible carrier bandwidth. At block1010-a, a transmission blanking on a forward link over the normal carrier bandwidth during a concurrent transmission over the flexible carrier bandwidth may be coordinated. Atblock1015, a transmission power over the flexible carrier bandwidth for the concurrent transmission may be increased during the coordinated transmission blanking over the normal carrier bandwidth. Atblock1020, the coordinated transmission blanking or the increased transmission power may be changed based on a time of day or a loading of the forward link.
• Turning toFIG. 10C, a flow diagram of a method1000-cfor reducing interference within a wireless communications system in accordance with various embodiments. Method1000-cmay be implemented utilizing various wireless communications devices including, but not limited to: amobile device115 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 7,FIG. 8, and/orFIG. 9; abase station105 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 8, orFIG. 9; acore network130 orcontroller120 as seen inFIG. 1 and/orFIG. 8; and/or adevice600 ofFIG. 6. Method1000-cmay be an example of method1000-aofFIG. 10A and/or method1000-bofFIG. 10B.
• At block1005-b, a normal carrier bandwidth and a flexible carrier bandwidth of the wireless communications system may be identified. The normal carrier bandwidth may at least partially overlap the flexible carrier bandwidth. At block1010-b, a transmission blanking on a forward link over the flexible carrier bandwidth during a concurrent transmission over the normal carrier bandwidth may be coordinated. In some embodiments, a transmission power over the normal carrier bandwidth for the concurrent transmission may be increased during the coordinated transmission blanking over the flexible carrier bandwidth as shown inblock1015.
• Turning toFIG. 11A, a flow diagram of a method1100-afor reducing interference within a wireless communications system in accordance with various embodiments. Method1100-amay be implemented utilizing various wireless communications devices including, but not limited to: amobile device115 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 7,FIG. 8, and/orFIG. 9; abase station105 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 8, and/orFIG. 9; acore network130 orcontroller120 as seen inFIG. 1 and/orFIG. 8; and/or adevice600 ofFIG. 6.
• Atblock1105, a first carrier bandwidth and a second carrier bandwidth of the wireless communications system may be identified. The first carrier bandwidth may at least partially overlap the second carrier bandwidth. Atblock1110, a transmission power increase for a forward link over the first carrier bandwidth may be coordinated with respect to the second carrier bandwidth. Some embodiments may further include coordinating a transmission blanking over the second carrier bandwidth during a concurrent transmission over the first carrier. The concurrent transmission over the first carrier bandwidth may occur during the transmission power increase. At least a time of day or a loading of the forward link may be determined in some cases; coordinating the transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth may change based on at least the determined time of day or the determined loading of the forward link.
• In some embodiments, the first carrier bandwidth is a flexible bandwidth and the second carrier bandwidth is a normal bandwidth. In some embodiments, the first carrier bandwidth is a first flexible bandwidth and the second carrier bandwidth is a second flexible bandwidth. In some embodiments, the first carrier bandwidth is a normal bandwidth and the second carrier bandwidth is a flexible bandwidth. In some embodiments, the first carrier bandwidth is a first normal bandwidth and the second carrier bandwidth is a second normal bandwidth.
• Some embodiments of method1100-amay further include coordinating a transmission blanking over the second carrier bandwidth during a concurrent transmission over the first carrier bandwidth. Some embodiments may further include coordinating a transmission blanking over the second carrier bandwidth during a concurrent transmission over the first carrier bandwidth.
• The transmission power increase over the first carrier bandwidth and the second carrier may not be not co-located in some embodiments. The transmission power increase may occur at a pre-scheduled time in some embodiments. Some embodiments may further include receiving a request to coordinate the transmission power increase at a specific time.
• Some embodiments may include identifying a third carrier bandwidth and the second carrier bandwidth of the wireless communications system where the second carrier bandwidth partially overlaps the third carrier bandwidth. A transmission power increase for a forward link over the third carrier bandwidth may be coordinated with respect to the second carrier bandwidth.
• Method1100-amay be performed by a base station in some embodiments.
• Turning toFIG. 11B, a flow diagram of a method1100-bfor reducing interference within a wireless communications system in accordance with various embodiments. Method1100-bmay be implemented utilizing various wireless communications devices including, but not limited to: amobile device115 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 7,FIG. 8, and/orFIG. 9; abase station105 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 8, and/orFIG. 9; acore network130 orcontroller120 as seen inFIG. 1 and/orFIG. 8; and/or adevice600 ofFIG. 6. Method1100-bmay be an example of method1100-aofFIG. 11A.
• At block1105-a, a flexible carrier bandwidth and a normal carrier bandwidth of the wireless communications system may be identified. The flexible carrier bandwidth may at least partially overlap the normal carrier bandwidth. Atblock1115, a request to coordinate a transmission power increase at a specific time may be received. At block1110-a, the transmission power increase for a forward link over the flexible carrier bandwidth may be coordinated with respect to the normal carrier bandwidth.
• Turning toFIG. 11C, a flow diagram of a method1100-cfor reducing interference within a wireless communications system in accordance with various embodiments. Method1100-cmay be implemented utilizing various wireless communications devices including, but not limited to: amobile device115 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 7,FIG. 8, and/orFIG. 9; abase station105 as seen inFIG. 1,FIG. 2,FIG. 3,FIG. 8, and/orFIG. 9; acore network130 orcontroller120 as seen inFIG. 1 and/orFIG. 8; and/or adevice600 ofFIG. 6. Method1100-cmay be an example of method1100-aofFIG. 11A and/or method1100-bofFIG. 11B.
• At block1105-b, a flexible carrier bandwidth and a normal carrier bandwidth of the wireless communications system may be identified. The flexible carrier bandwidth may at least partially overlap the normal carrier bandwidth. In some embodiments, a request to coordinate a transmission power increase at a specific time may be received as seen in block1115-a. At block1110-b, the transmission power increase for a forward link over the normal carrier bandwidth may be coordinated with respect to the flexible carrier bandwidth.
• The detailed description set forth above in connection with the appended drawings describes exemplary embodiments and does not represent the only embodiments that may be implemented or that are within the scope of the claims. The term “exemplary” used throughout this description means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other embodiments.” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described embodiments.
• Information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
• The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
• The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. Also, as used herein, including in the claims, “or” as used in a list of items prefaced by “at least one of” indicates a disjunctive list such that, for example, a list of “at least one of A, B, or C” means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).
• Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.
• The previous description of the disclosure is provided to enable a person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Throughout this disclosure the term “example” or “exemplary” indicates an example or instance and does not imply or require any preference for the noted example. Thus, the disclosure is not to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (77)

What is claimed is:

1. A method of reducing interference within a wireless communications system, the method comprising:

identifying a first carrier bandwidth that at least partially overlaps a second carrier bandwidth of the wireless communications system; and

coordinating a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.

2. The method ofclaim 1, further comprising:

increasing a power of transmission over the second carrier bandwidth during the coordinated transmission blanking over the first carrier bandwidth.

3. The method ofclaim 1, wherein coordinating the transmission blanking on the forward link over the first carrier bandwidth further comprises:

determining a timing of a control transmission over the second carrier bandwidth and coordinating the transmission blanking based on the determined timing of the control channel transmission over the second carrier bandwidth.

4. The method ofclaim 1, wherein coordinating the transmission blanking on the forward link over the first carrier bandwidth further comprises:

determining a data transmission over the second carrier bandwidth and wherein coordinating the transmission blanking on the forward link over the first carrier bandwidth occurs during the data transmission over the second carrier bandwidth.

5. The method ofclaim 1, further comprising:

changing the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidths based on at least a time of day.

6. The method ofclaim 1, further comprising:

changing the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidths based on at least a loading of the forward link.

7. The method ofclaim 1, wherein at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.

8. The method ofclaim 1, wherein the first carrier bandwidth and the second carrier bandwidth are normal carrier bandwidths.

9. The method ofclaim 1, wherein the first carrier bandwidth fully overlaps the second carrier bandwidth.

10. The method ofclaim 1, wherein the coordinated transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier bandwidth occur at a co-location.

11. The method ofclaim 1, wherein the coordinated transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier bandwidth are not co-located.

12. The method ofclaim 1, wherein the coordinated transmission blanking over the first carrier bandwidth occurs at a pre-scheduled time.

13. The method ofclaim 1, wherein the coordinated transmission blanking over the first carrier bandwidth and the concurrent transmission over the second carrier bandwidth are synchronized with respect to at least an absolute time or a known time offset.

14. The method ofclaim 1, wherein at least the first carrier bandwidth or the second carrier bandwidth utilizes licensed spectrum.

15. The method ofclaim 1, wherein the first carrier bandwidth and the second carrier bandwidth utilize different radio access technologies (RAT).

16. The method ofclaim 1, wherein coordinating the transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth comprises:

coordinating a hard transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.

17. The method ofclaim 1, wherein the coordinated hard transmission blanking comprises no flow being scheduled for transmission during a period of the coordinated hard transmission blanking.

18. The method ofclaim 1, wherein coordinating the transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth comprises:

coordinating a soft transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.

19. The method ofclaim 18, wherein the coordinated soft transmission blanking comprises a transmission of at least a priority flow or a delay sensitive flow during a period of the coordinated soft transmission blanking.

20. The method ofclaim 18, wherein the coordinated soft transmission blanking comprises reducing a power of transmission during a period of the coordinated soft transmission blanking.

21. The method ofclaim 18, wherein the coordinated soft transmission blanking comprises a transmission during a portion of the coordinated soft transmission blanking less than an entire period of the coordinated soft transmission blanking.

22. The method ofclaim 1, further comprising:

receiving a request from the second carrier bandwidth to coordinate the transmission blanking at a specific time; and

agreeing to accommodate the request from the second carrier bandwidth.

23. The method ofclaim 1, wherein the coordinated transmission blanking occurs at a base station.

24. The method ofclaim 1, wherein the wireless communications system comprises a time division multiplexing system.

25. The method ofclaim 2, wherein the power increase over the second carrier bandwidth and the coordinated transmission blanking over the first carrier bandwidth are applied independently.

26. The method ofclaim 2, wherein the power increase over the second carrier bandwidth and the coordinated transmission blanking over the first carrier bandwidth are applied together.

27. The method ofclaim 2, wherein the power increase over the second carrier bandwidth and the coordinated transmission blanking over the first carrier bandwidth are activated in co-located systems.

28. The method ofclaim 27, wherein the power increase over the second carrier bandwidth and the coordinated transmission blanking over the first carrier bandwidth are activated in co-located systems based on a load of the co-located systems.

29. The method ofclaim 27, wherein the coordinated transmission blanking over the first carrier bandwidth occurs at a slot level.

30. The method ofclaim 2, further comprising:

increasing at least a data rate of at least a control channel or data channel utilizing the power increase over the second carrier bandwidth.

31. The method ofclaim 1, further comprising:

increasing a power of transmission over the first carrier bandwidth during a period of time different than the coordinated transmission blanking over the first carrier bandwidth.

32. The method ofclaim 1, further comprising,

coordinating the concurrent transmission over the second carrier bandwidth during one or more slots when the first carrier bandwidth is not transmitting.

33. The method ofclaim 1, further comprising:

coordinating a transmission blanking on a forward link over the second carrier bandwidth during a concurrent transmission over the first carrier bandwidth or increasing a power of transmission over the first carrier bandwidth during a coordinated transmission blanking on a forward link over the second carrier bandwidth.

34. The method ofclaim 33, wherein coordinating the transmission blanking on the forward link over the second carrier bandwidth during the concurrent transmission over the first carrier bandwidth depends at least upon a relative loading of the first carrier bandwidth with respect to the second carrier bandwidth or a time of day.

35. The method ofclaim 1, further comprising:

coordinating a power transmission increase over the first carrier bandwidth during a coordinated transmission blanking on a forward link over the second carrier bandwidth.

36. The method ofclaim 1, further comprising:

identifying a third carrier bandwidth different from the second carrier bandwidth that at least partially overlaps the first carrier bandwidth of the wireless communications system; and

coordinating a transmission blanking on the forward link over the first carrier bandwidth during a concurrent transmission over the third carrier bandwidth.

37. A wireless communications system configured for reducing interference, the system comprising

a means for identifying a first carrier bandwidth that at least partially overlaps a second carrier bandwidth of the wireless communications system; and

a means for coordinating a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.

38. The system ofclaim 37, further comprising:

a means for coordinating the transmission blanking on the forward link over the first carrier bandwidth during a control channel transmission over the second carrier bandwidth.

39. The system ofclaim 37, further comprising:

a means for changing the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth based on at least a time of day or a loading of the forward link.

40. The system ofclaim 37, wherein at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.

41. The system ofclaim 37, further comprising:

a means for coordinating a hard transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.

42. The system ofclaim 37, further comprising:

a means for coordinating a soft transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.

43. The system ofclaim 37, further comprising:

a means for increasing a transmission power over the second carrier bandwidth during the coordinated transmission blanking over the first carrier bandwidth.

44. A computer program product for reducing interference within a wireless communications system comprising:

a non-transitory computer-readable medium comprising:

code for identifying a first carrier bandwidth that at least partially overlaps a second carrier bandwidth of the wireless communications system; and

code for coordinating a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.

45. The computer program product ofclaim 44, wherein the non-transitory computer-readable medium further comprising:

code for coordinating the transmission blanking on the forward link over the first carrier bandwidth during a control channel transmission over the second carrier bandwidth.

46. The computer program product ofclaim 44, wherein the non-transitory computer-readable medium further comprising:

code for changing the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth based on at least a time of day or a loading of the forward link.

47. The computer program product ofclaim 44, wherein at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.

48. The computer program product ofclaim 44, wherein the non-transitory computer-readable medium further comprising:

code for coordinating a hard transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.

49. The computer program product ofclaim 44, wherein the non-transitory computer-readable medium further comprising:

code for coordinating a soft transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.

50. The computer program product ofclaim 44, wherein the non-transitory computer-readable medium further comprising:

code for increasing a transmission power over the second carrier bandwidth during the coordinated transmission blanking over the first carrier bandwidth.

51. A wireless communications device configured for reducing interference within a wireless communications system, the device comprising:

at least one processor configured to:

identify a first carrier bandwidth that at least partially overlaps a second carrier bandwidth of the wireless communications system; and

coordinate a transmission blanking on a forward link over the first carrier bandwidth during a concurrent transmission over the second carrier bandwidth.

52. The device ofclaim 51, wherein the at least one processor is further configured to:

coordinate the transmission blanking on the forward link over the first carrier bandwidth during a control channel transmission over the second carrier bandwidth.

53. The device ofclaim 51, wherein the at least one processor is further configured to:

change the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth based on at least a time of day or a loading of the forward link.

54. The device ofclaim 51, wherein at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.

55. The device ofclaim 51, wherein the at least one processor is further configured to:

coordinate a hard transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.

56. The device ofclaim 51, wherein the at least one processor is further configured to:

coordinate a soft transmission blanking as the coordinated transmission blanking on the forward link over the first carrier bandwidth during the concurrent transmission over the second carrier bandwidth.

57. A method of reducing interference within a wireless communications system, the method comprising:

identifying a first carrier bandwidth and a second carrier bandwidth of the wireless communications system, wherein the first carrier bandwidth at least partially overlaps the second carrier bandwidth; and

coordinating a transmission power increase for a forward link over the first carrier bandwidth with respect to the second carrier bandwidth.

58. The method ofclaim 57, further comprising:

determining at least a time of day or a loading of the forward link and coordinating the transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth changes based on at least the determined time of day or the determined loading of the forward link.

59. The method ofclaim 57, further comprising:

receiving a request to coordinate the transmission power increase at a specific time.

60. The method ofclaim 57, further comprising:

coordinating a transmission blanking over the second carrier bandwidth during the coordinated transmission power increase over the first carrier bandwidth.

61. The method ofclaim 57, wherein at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.

62. The method ofclaim 57, wherein coordinating the transmission power increase occurs at a pre-scheduled time.

63. The method ofclaim 57, wherein coordinating the transmission power increase occurs at a base station.

64. The method ofclaim 57, further comprising:

identifying a third carrier bandwidth and the second carrier bandwidth of the wireless communications system, wherein the second carrier bandwidth partially overlaps the third carrier bandwidth; and

coordinating a transmission power increase for a forward link over the third carrier bandwidth with respect to the second carrier bandwidth.

65. A wireless communications system configured for reducing interference, the system comprising:

a means for identifying a first carrier bandwidth and a second carrier bandwidth of the wireless communications system, wherein the first carrier bandwidth at least partially overlaps the second carrier bandwidth; and

a means for coordinating a transmission power increase for a forward link over the first carrier bandwidth with respect to the second carrier bandwidth.

66. The system ofclaim 65, further comprising:

a means for changing the coordinated transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth based on at least a time of day or a loading of the forward link.

67. The system ofclaim 65, wherein at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.

68. The system ofclaim 65, further comprising:

a means for coordinating a transmission blanking over the second carrier bandwidth during the coordinated transmission power increase over the first carrier bandwidth.

69. The system ofclaim 65, further comprising:

a means for receiving a request to coordinate the transmission power increase at a specific time.

70. A computer program product for reducing interference within a wireless communications system comprising:

a non-transitory computer-readable medium comprising:

code for identifying a first carrier bandwidth and a second carrier bandwidth of the wireless communications system, wherein the first carrier bandwidth at least partially overlaps the second carrier bandwidth; and

code for coordinating a transmission power increase for a forward link over the first carrier bandwidth with respect to the second carrier bandwidth.

71. The computer program product ofclaim 70, wherein the non-transitory computer-readable medium further comprising:

code for changing the coordinated transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth based on at least a time of day or a loading of the forward link.

72. The computer program product ofclaim 70, wherein at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.

73. A wireless communications device configured for reducing interference, the device comprising:

at least one processor configured to:

identify a first carrier bandwidth and a second carrier bandwidth of the wireless communications system, wherein the first carrier bandwidth at least partially overlaps the second carrier bandwidth; and

coordinate a transmission power increase for a forward link over the first carrier bandwidth with respect to the second carrier bandwidth.

74. The device ofclaim 73, wherein the at least one processor is further configured to:

change the coordinated transmission power increase for the forward link over the first carrier bandwidth with respect to the second carrier bandwidth based on at least a time of day or a loading of the forward link.

75. The device ofclaim 73, wherein at least the first carrier bandwidth or the second carrier bandwidth is a flexible carrier bandwidth.

76. The device ofclaim 73, wherein the at least one processor is further configured to:

coordinate a transmission blanking over the second carrier bandwidth during the coordinated transmission power increase over the first carrier bandwidth.

77. The device ofclaim 73, wherein the at least one processor is further configured to:

receive a request to coordinate the transmission power increase at a specific time.

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