CN101222264A - Device and method for sending frame information in relay broadband wireless access communication system - Google Patents
Device and method for sending frame information in relay broadband wireless access communication systemDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese相关申请的交叉引用Cross References to Related Applications
本申请要求2007年1月8日向韩国知识产权局提交的并被分配了序号No.2007-2216的申请、在2007年1月10日提交的并被分配了序号No.2007-2945的申请、以及在2007年2月8日提交的并被分配了序号No.2007-12979的申请在35 U.S.C§119(a)下的优先权，其全部公开在此合并作为参考。This application claims the application filed with the Korean Intellectual Property Office on January 8, 2007 and assigned serial number No. 2007-2216, the application filed on January 10, 2007 and assigned serial number No. 2007-2945, and priority under 35 U.S.C § 119(a) of an application filed February 8, 2007 and assigned Serial No. 2007-12979, the entire disclosure of which is hereby incorporated by reference.
技术领域technical field
本发明总体上涉及一种多跳中继无线通信系统，更具体地涉及一种用于在多跳中继无线通信系统中将帧信息从基站(BS)或上游(upper)中继站(RS)发送到下游(lower)RS的设备及方法。The present invention generally relates to a multi-hop relay wireless communication system, and more particularly to a method for transmitting frame information from a base station (BS) or an upstream (upper) relay station (RS) in a multi-hop relay wireless communication system Apparatus and method to lower RS.
背景技术Background technique
在第四代(4G)通信系统中，可以减小小区半径来实现更高传输速率并容纳更多数量的小区。使用传统技术的集中式网络设计对于4G移动通信系统不可行。因此，4G移动通信系统应考虑分布式控制和实现，并积极应对诸如新BS的添加之类的环境变化。为此，4G移动通信系统应使用可自配置的无线网络。In the fourth generation (4G) communication system, the cell radius can be reduced to achieve higher transmission rate and accommodate a larger number of cells. The centralized network design using traditional technology is not feasible for 4G mobile communication system. Therefore, a 4G mobile communication system should consider distributed control and implementation, and actively respond to environmental changes such as the addition of new BSs. To this end, the 4G mobile communication system should use a self-configurable wireless network.
将用于ad-hoc网络的技术引入4G移动通信系统中，用于可自配置无线网络的部署。基本示例是一种通过将用于ad-hoc网络的多跳中继方案引入使用固定BS的蜂窝网络所配置的多跳中继网络。The technology used in ad-hoc networks is introduced into the 4G mobile communication system for the deployment of self-configurable wireless networks. A basic example is a multi-hop relay network configured by introducing a multi-hop relay scheme for an ad-hoc network into a cellular network using a fixed BS.
因为通过直接链路在BS和移动台(MS)之间执行通信，所以在蜂窝网络中可以很容易地在BS和移动台之间建立高度可靠的无线链路。然而，BS的固定性妨碍了灵活的无线网络配置，从而很难在经历波动的业务分布和呼叫数量的显著变化的无线电环境中提供有效的服务。Since communication is performed between a BS and a mobile station (MS) through a direct link, a highly reliable wireless link can be easily established between the BS and the mobile station in a cellular network. However, the fixed nature of BSs hinders flexible wireless network configuration, making it difficult to provide effective services in radio environments that experience fluctuating traffic distribution and significant changes in the number of calls.
为了避免上述问题，采用了一种中继方案，在其中经由相邻的MS或相邻的BS通过多跳来发送数据。多跳中继方案有利于适应环境变化的快速网络重新配置并有助于整体无线网络操作效率。In order to avoid the above-mentioned problems, a relay scheme is employed in which data is transmitted through multi-hops via neighboring MSs or neighboring BSs. The multi-hop relay scheme facilitates fast network reconfiguration to adapt to environmental changes and contributes to overall wireless network operational efficiency.
此外，通过在BS和MS之间安装RS并由此建立经由RS的多跳中继路径，该多跳中继方案可以向MS提供改进的无线电信道质量。此外，该多跳中继方案能够扩展小区覆盖，因为它能够在来自BS的信道条件不良的小区边界区域中向MS提供高速数据信道。Furthermore, the multi-hop relay scheme can provide MSs with improved radio channel quality by installing an RS between the BS and the MS and thereby establishing a multi-hop relay path via the RS. In addition, this multi-hop relay scheme is able to extend cell coverage because it can provide high-speed data channels to MSs in cell border areas with poor channel conditions from BSs.
图1示出了使用传统中继方案的无线通信系统的配置。FIG. 1 shows the configuration of a wireless communication system using a conventional relay scheme.
参照图1，位于BS 100的服务区(即，覆盖)101内的第一MS(MS1)110通过直接链路A与BS 100通信。位于BS 100的服务区101外并因此处于不良信道条件的第二MS(MS2)120通过RS 130的中继链路与BS 100通信。Referring to FIG. 1, a first MS (MS1) 110 located within a service area (ie, coverage) 101 of a
换言之，利用RS 130，BS 100能够与处于不良信道条件的MS通信，因为这些MS位于BS 100的服务区101外或位于经历来自建筑物的严重屏蔽效应的阴影区。In other words, using the RS 130, the
为了支持使用RS的中继链路，使用中继方案的无线通信系统必须使用如图2所述的结构来执行通信，该结构优选地是针对使用传统中继方案的无线通信系统的帧结构。In order to support a relay link using RS, a wireless communication system using a relay scheme must perform communication using a structure as described in FIG. 2, which is preferably a frame structure for a wireless communication system using a conventional relay scheme.
参照图2，该帧被分成下行链路(DL)子帧200和上行链路(UL)子帧230。DL/UL子帧200/230被分成针对直接链路服务的第一部分210/240以及针对中继链路服务的第二部分220/250。Referring to FIG. 2 , the frame is divided into a downlink (DL) subframe 200 and an uplink (UL) subframe 230 . The DL/UL subframe 200/230 is divided into a
DL子帧200的第一部分210包括BS前同步码信道211、控制信道213、以及业务信道215，用于从BS通过直接链路到RS和MS的传输。The
DL子帧200的第二部分220包括前同步码信道221、控制信道223、以及业务信道225，用于从BS通过中继链路到MS的传输。The
UL子帧230的第一部分240用于从通过直接链路连接的RS和MS向BS传输控制信息和业务数据。UL子帧230的第二部分250用于从通过中继链路连接的MS向RS发送控制信息和业务数据。The
如上所述，为了支持中继方案，无线通信系统使用如图2所示的帧结构来执行通信。然而，图2中的帧结构仅支持两跳无线通信系统，因为该帧结构没有针对RS-RS通信的部分。因此，使用中继方案的无线通信系统需要用于支持多跳中继业务的帧结构。As described above, in order to support the relay scheme, the wireless communication system performs communication using a frame structure as shown in FIG. 2 . However, the frame structure in FIG. 2 only supports a two-hop wireless communication system because the frame structure has no part for RS-RS communication. Therefore, a wireless communication system using a relay scheme requires a frame structure for supporting multi-hop relay traffic.
发明内容Contents of the invention
本发明的目的是从实质上解决至少上述问题和/或缺点，并提供至少以下优点。因此，本发明的目的是提供一种用于支持无线通信系统中的多跳中继业务的帧结构的设备及方法。An object of the present invention is to substantially solve at least the above-mentioned problems and/or disadvantages and to provide at least the advantages below. Therefore, the object of the present invention is to provide a device and method for supporting a frame structure of a multi-hop relay service in a wireless communication system.
本发明的目的是提供一种用于在多跳中继无线通信系统中从BS到RS发送帧信息的设备及方法。An object of the present invention is to provide an apparatus and method for transmitting frame information from a BS to an RS in a multi-hop relay wireless communication system.
本发明的目的是提供一种用于在多跳中继无线通信系统中从上游RS到下游RS发送帧信息的设备及方法。An object of the present invention is to provide an apparatus and method for transmitting frame information from an upstream RS to a downstream RS in a multi-hop relay wireless communication system.
根据本发明，一种用于在使用中继方案的无线通信系统中从上游节点发送帧信息的方法包括：应下游中继站对于初始连接的请求，将针对中继业务用于与下游中继站进行通信的下行链路部分信息发送到下游中继站，并在与下游中继站的初始连接之后，通过下行链路部分将针对中继业务用于与下游中继站进行通信的帧信息发送到下游中继站。According to the present invention, a method for transmitting frame information from an upstream node in a wireless communication system using a relay scheme includes: responding to a request of a downstream relay station for an initial connection, using The downlink part information is transmitted to the downstream relay station, and frame information for communicating with the downstream relay station for relay traffic is transmitted to the downstream relay station through the downlink part after the initial connection with the downstream relay station.
根据本发明，一种用于在使用中继方案的无线通信系统的中继站处获取帧信息的方法包括：在与上游节点的初始连接处，从上游节点获取针对中继业务用于与下游中继站进行通信的下行链路部分信息，以及在与上游节点的初始连接之后，通过下行链路信息获取针对中继业务用于与下游中继站进行通信的帧信息。According to the present invention, a method for obtaining frame information at a relay station of a wireless communication system using a relay scheme includes: at an initial connection with an upstream node, obtaining from the upstream node a The downlink part information of the communication, and after the initial connection with the upstream node, the frame information for communicating with the downstream relay station for the relay traffic is acquired through the downlink information.
根据本发明，一种在使用中继方案的无线通信系统中发送帧信息的设备包括：接收机，用于从上游节点接收信号；消息处理器，用于从接收信号中所包含的控制消息中获取帧信息；消息发生器，用于产生用于将帧信息发送到下游节点的控制消息；以及发送机，用于将控制消息发送到下游中继站。According to the present invention, an apparatus for transmitting frame information in a wireless communication system using a relay scheme includes: a receiver for receiving a signal from an upstream node; a message processor for receiving a signal from a control message included in the received signal The frame information is acquired; the message generator is used for generating a control message for sending the frame information to a downstream node; and the sender is used for sending the control message to a downstream relay station.
附图说明Description of drawings
从结合附图的下列详细描述中，本发明的上述和其它方面、特征和优点将变得更加显而易见，在附图中：The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:
图1示出了使用传统中继方案的无线通信系统的配置；Figure 1 shows the configuration of a wireless communication system using a conventional relay scheme;
图2示出了使用传统中继方案的无线通信系统的帧结构；FIG. 2 shows a frame structure of a wireless communication system using a conventional relay scheme;
图3示出了根据本发明的实施例的多跳中继无线通信系统的帧结构；FIG. 3 shows a frame structure of a multi-hop relay wireless communication system according to an embodiment of the present invention;
图4示出了根据本发明的第一实施例的使用多跳中继无线通信系统的帧结构的通信过程；FIG. 4 shows a communication process using a frame structure of a multi-hop relay wireless communication system according to a first embodiment of the present invention;
图5示出了根据本发明的第二实施例的使用多跳中继无线通信系统的帧结构的通信过程；5 shows a communication process using a frame structure of a multi-hop relay wireless communication system according to a second embodiment of the present invention;
图6示出了在根据本发明的多跳中继无线通信系统中BS发送帧信息的过程；Fig. 6 shows the process of BS sending frame information in the multi-hop relay wireless communication system according to the present invention;
图7示出了在根据本发明的多跳中继无线通信系统中RS从BS接收帧信息的过程；Fig. 7 shows the process of RS receiving frame information from BS in the multi-hop relay wireless communication system according to the present invention;
图8示出了在根据本发明的多跳中继无线通信系统中上游RS向下游RS发送帧信息的过程；FIG. 8 shows a process in which an upstream RS sends frame information to a downstream RS in a multi-hop relay wireless communication system according to the present invention;
图9示出了在根据本发明的多跳中继无线通信系统中下游RS从上游RS接收帧信息的过程；9 shows a process in which a downstream RS receives frame information from an upstream RS in a multi-hop relay wireless communication system according to the present invention;
图10示出了在根据本发明的多跳中继无线通信系统中的RS。FIG. 10 shows RSs in a multi-hop relay wireless communication system according to the present invention.
具体实施方式Detailed ways
下面将参考附图描述本发明的优选实施例。在下列描述中，为了清楚简要起见，不对公知的功能或构造进行详细描述。Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail for clarity and conciseness.
本发明提供了一种用于在多跳中继无线通信系统将帧信息从上游节点发送到下游RS的方案。这里，上游节点表示BS或上游RS。The present invention provides a scheme for sending frame information from an upstream node to a downstream RS in a multi-hop relay wireless communication system. Here, an upstream node means a BS or an upstream RS.
下列描述以时分双工正交频分多址(TDD-OFDMA)无线通信系统为背景进行，但本发明不局限于此。因此，应清楚地理解，本发明可应用于任意其它多址无线通信系统。The following description is made in the context of a Time Division Duplex Orthogonal Frequency Division Multiple Access (TDD-OFDMA) wireless communication system, but the present invention is not limited thereto. Therefore, it should be clearly understood that the present invention is applicable to any other multiple access wireless communication systems.
为了支持多跳中继业务，无线通信系统使用如图3所示的帧结构执行通信。然而，应清楚地理解，本发明可适用于任意其它帧结构。In order to support multi-hop relay services, the wireless communication system performs communication using the frame structure shown in FIG. 3 . However, it should be clearly understood that the present invention is applicable to any other frame structure.
图3示出了根据本发明的多跳中继无线通信系统的帧结构。FIG. 3 shows the frame structure of the multi-hop relay wireless communication system according to the present invention.
参照图3，该帧包括DL子帧300和UL子帧310。Referring to FIG. 3 , the frame includes a DL subframe 300 and a UL subframe 310 .
当该无线通信系统使用两跳时，将DL/UL子帧300/310分成第一部分301/311和第二部分303/313。在第一部分301/311与第二部分303/313之间存在第四部分307/317。然而，当无线通信系统使用两跳时，不存在第四部分307/317。因此，第一部分301/311和第二部分303/313可以扩展到第四部分307/317。在第一部分301/311中，BS和RS与其覆盖区域内的MS进行通信。在第二部分303/313中，BS与RS进行通信。When the wireless communication system uses two hops, the DL/UL subframe 300/310 is divided into a first part 301/311 and a second part 303/313. Between the first section 301/311 and the second section 303/313 there is a fourth section 307/317. However, when the wireless communication system uses two hops, the fourth part 307/317 does not exist. Thus, the first part 301/311 and the second part 303/313 can be extended to a fourth part 307/317. In the first part 301/311, the BS and RS communicate with MSs within their coverage area. In the second part 303/313, the BS communicates with the RS.
当无线通信系统支持实时服务时，RS必须以一个帧来中继信号，以减小传输延迟。因此，DL/UL子帧300/310分成第一部分301/311、第二部分303/313、以及第三部分305/315。在第一部分301/311和第三部分305/315中，BS和RS与其覆盖区域内的MS进行通信。在第二部分303/313中，BS与RS进行通信。换言之，在下行链路上，RS利用第二部分303从BS接收数据。其后，利用第三部分305，RS将利用第二部分303从BS接收到的数据中继到其覆盖区域内的MS。When a wireless communication system supports real-time services, the RS must relay signals in one frame to reduce transmission delay. Accordingly, the DL/UL subframe 300/310 is divided into a first part 301/311, a second part 303/313, and a third part 305/315. In the first part 301/311 and the third part 305/315, the BS and RS communicate with MSs within their coverage areas. In the second part 303/313, the BS communicates with the RS. In other words, on the downlink, the RS utilizes the second part 303 to receive data from the BS. Thereafter, using the third part 305, the RS relays the data received from the BS using the second part 303 to the MSs within its coverage area.
如上所述，可以通过调整被分成了两个部分的子帧中的两个部分的大小来将该子帧分成三个部分。备选地，可以通过在被分成两个部分的子帧中添加第三部分来将该子帧分成三个部分。As described above, a subframe divided into two parts can be divided into three parts by adjusting the size of two parts. Alternatively, the subframe divided into three parts may be divided into three parts by adding a third part in the subframe divided into two parts.
当无线通信系统使用三个或更多跳时，该帧必须包括用于RS间通信(即，RS之间的通信，例如上游RS与下游RS之间的通信)的部分。因此，针对RS间通信的部分位于第二部分303/313之前或之后。When the wireless communication system uses three or more hops, the frame must include a section for inter-RS communication (ie, communication between RSs, eg, communication between an upstream RS and a downstream RS). Therefore, the section for inter-RS communication is located before or after the second section 303/313.
当针对RS间通信的部分位于第二部分303/313之前时，DL/UL子帧300/310包括第一部分301/311、第二部分303/313、以及第四部分307/317。在第一部分301/311中，BS和RS与其覆盖区域内的MS通信。在第四部分307/317中，上游RS与下游RS进行通信，BS与其覆盖区域内的MS进行通信。When the part for inter-RS communication precedes the second part 303/313, the DL/UL subframe 300/310 includes a first part 301/311, a second part 303/313, and a fourth part 307/317. In the first part 301/311, the BS and RS communicate with MSs within their coverage area. In the fourth part 307/317, the upstream RS communicates with the downstream RS and the BS communicates with MSs within its coverage area.
当针对RS间通信的部分位于第二部分303/313之后时，DL/UL子帧300/310包括第一部分301/311、第二部分303/313、以及第五部分309/319。利用第一部分301/311，BS和RS与其覆盖区域内的MS通信。利用第二部分303/313，BS与RS进行通信。利用第五部分309/319，上游RS与下游RS进行通信，以及BS与其覆盖区域内的MS进行通信。在这种情况下，可以将第五部分309/319添加到第二部分303/313之后。When the part for inter-RS communication is located after the second part 303/313, the DL/UL subframe 300/310 includes a first part 301/311, a second part 303/313, and a fifth part 309/319. Using the first part 301/311, the BS and RS communicate with MSs within their coverage area. Using the second part 303/313, the BS communicates with the RS. Utilizing the fifth part 309/319, the upstream RS communicates with the downstream RS, and the BS communicates with MSs within its coverage area. In this case, the fifth part 309/319 may be added after the second part 303/313.
此外，子帧内可以存在三个或更多中继业务部分(即，针对中继业务的部分)。例如，对于中继业务，DL子帧300中可以包括用于BS与RS之间的通信的第二部分303以及用于RS之间的通信的第四和第五部分307和309。下列描述基于子帧包括三个中继业务部分的假设进行。然而，应清楚理解，该子帧可以包括三个或更多中继业务部分。In addition, there may be three or more relay traffic sections (ie, sections for relay traffic) within a subframe. For example, for the relay service, the DL subframe 300 may include a second part 303 for communication between the BS and the RS, and fourth and fifth parts 307 and 309 for communication between the RSs. The following description is made on the assumption that a subframe includes three relay traffic parts. However, it should be clearly understood that the subframe may comprise three or more relay traffic parts.
利用第一部分301/311，BS和RS与其覆盖区域内的MS通信。利用第二部分303/313、第四部分307/317、以及第五部分309/319中的至少之一，BS与1跳RS进行通信。在这点上，RS使用第二部分303/313、第四部分307/317、以及第五部分309/319中没有用于与BS进行通信的其它来执行RS间通信。在这种情况下，RS利用第二部分303/313、第四部分307/317、以及第五部分309/319中的一些可以不提供任何服务。换言之，为了减小由中继部分的重新使用所引起的RS间干扰，可以在一些部分中将一些RS设置为空闲模式，以便不提供服务。Using the first part 301/311, the BS and RS communicate with MSs within their coverage area. Using at least one of the second part 303/313, the fourth part 307/317, and the fifth part 309/319, the BS communicates with the 1-hop RS. In this regard, the RS performs inter-RS communication using the second part 303/313, the fourth part 307/317, and the fifth part 309/319 that are not used for communication with the BS. In this case, the RS may not provide any service using some of the second part 303/313, the fourth part 307/317, and the fifth part 309/319. In other words, in order to reduce inter-RS interference caused by reuse of relay sections, some RSs may be set in idle mode in some sections so as not to provide services.
当使用三个或多跳的无线通信系统支持实时服务时，RS必须以一个帧来中继信号，以减小传输延迟。因此，将DL/UL子帧300/310分成第一部分301/311、第二部分303/313、第三部分305/315、以及第四部分307/317或针对RS间通信的第五部分309/319。这里，第五部分309/319可以被包括在第三部分305/315中。When supporting a real-time service using a wireless communication system of three or more hops, the RS must relay signals in one frame to reduce transmission delay. Therefore, the DL/UL subframe 300/310 is divided into a first part 301/311, a second part 303/313, a third part 305/315, and a fourth part 307/317 or a fifth part 309/317 for inter-RS communication 319. Here, the fifth part 309/319 may be included in the third part 305/315.
在上述帧结构的DL子帧300中，同步(sync)信道可以位于每个中继业务部分的开始或结尾。这里，中继业务部分是第二部分303、第三部分305、第四部分307、以及第五部分309。In the DL subframe 300 of the above frame structure, a synchronization (sync) channel may be located at the beginning or end of each relay traffic section. Here, the relay service parts are the second part 303 , the third part 305 , the fourth part 307 , and the fifth part 309 .
当BS或上游RS使用控制信息发送关于sync信道的位置的信息(例如，DL介质访问协议(MAP))时，该sync信道可以位于每个中继业务部分的中心。When the BS or the upstream RS transmits information on the location of the sync channel (for example, DL Medium Access Protocol (MAP)) using control information, the sync channel may be located at the center of each relay traffic part.
此外，BS和上游RS可以在中继业务部分中包括控制消息，例如用于指示资源分配信息的MAP消息、以及用于通知MAP的配置信息的帧控制报头(FCH)。In addition, the BS and the upstream RS may include control messages, such as a MAP message for indicating resource allocation information, and a Frame Control Header (FCH) for notifying configuration information of the MAP, in the relay traffic part.
在这种情况下，BS和上游RS可以在所有中继业务部分中包括sync信道和控制消息。备选地，BS和上游RS可以仅在一些子帧部分中包括sync信道和控制消息。In this case, the BS and the upstream RS can include sync channels and control messages in all relay traffic parts. Alternatively, the BS and the upstream RS may only include sync channels and control messages in some subframe parts.
使用无线通信系统中的上述帧结构给出了对通信方案的下列描述。The following description of the communication scheme is given using the above frame structure in the wireless communication system.
首先，将给出了对一种用于使用包括两个中继业务部分的子帧在执行无线通信系统中执行通信的方法的描述。在下列描述中，假设使用第二部分303/313和第四部分307/317作为两个中继业务部分。然而，应清楚地理解，也可以使用第二部分303/313和第五部分309/319作为两个中继业务部分。此外，假设该无线通信系统包括第三部分305/315，因此RS可以支持使用一个帧的中继业务。First, a description will be given of a method for performing communication in a system performing wireless communication using a subframe including two relay traffic parts. In the following description, it is assumed that the second part 303/313 and the fourth part 307/317 are used as two relay service parts. However, it should be clearly understood that it is also possible to use the second part 303/313 and the fifth part 309/319 as two relay traffic parts. In addition, it is assumed that the wireless communication system includes the third part 305/315, so the RS can support the relay service using one frame.
为了支持中继业务，通过使用第一部分301/311、第二部分303/313、第三部分305/315和第四部分307/317，无线通信系统的BS和RS可以如图4所示地进行操作。顺序地标记图4中的子帧部分，其与图3中的子帧部分的标记无关。例如，第一部分301/311相当于图4中的第一部分401/411，以及图3中的第四部分307/317相当于图4中的第二部分403/413。此外，图3中的第二部分303/313相当于图4中的第三部分405/415，以及图3中的第三部分305/315相当于图4中的第四部分407/417。In order to support the relay service, by using the first part 301/311, the second part 303/313, the third part 305/315 and the fourth part 307/317, the BS and RS of the wireless communication system can perform operate. The subframe parts in FIG. 4 are labeled sequentially, independently of the labeling of the subframe parts in FIG. 3 . For example, the first part 301/311 corresponds to the first part 401/411 in FIG. 4, and the fourth part 307/317 in FIG. 3 corresponds to the second part 403/413 in FIG. Furthermore, the second portion 303/313 in FIG. 3 corresponds to the third portion 405/415 in FIG. 4, and the third portion 305/315 in FIG. 3 corresponds to the fourth portion 407/417 in FIG.
图4示出了使用根据本发明的第一实施例的多跳中继无线通信系统的帧结构的通信过程。在下列描述中，将奇数跳RS称为第一组，而将偶数跳RS称为第二组。FIG. 4 shows a communication process using the frame structure of the multi-hop relay wireless communication system according to the first embodiment of the present invention. In the following description, the odd-hop RSs are referred to as the first group, and the even-numbered RSs are referred to as the second group.
参照图4，该帧包括DL子帧400和UL子帧410。根据时间资源，将DL/UL子帧400/410分成第一部分401/411、第二部分403/413、第三部分405/415和第四部分407/417。Referring to FIG. 4 , the frame includes a DL subframe 400 and a UL subframe 410 . According to the time resource, the DL/UL subframe 400/410 is divided into a first part 401/411, a second part 403/413, a third part 405/415 and a fourth part 407/417.
利用DL子帧400的第一、第二和第四部分401、403和407，BS420向其覆盖区域内的MS发送DL数据。其后，利用第三部分405/415，BS 420将DL数据发送到1跳RS 430。这里，在第一组中引入了1跳RS。Using the first, second and fourth parts 401, 403 and 407 of the DL subframe 400, the
此外，利用UL子帧410的第一、第二和第四部分411、413和417，BS 420从MS接收UL数据。其后，利用第三部分415，BS 420从1跳RS 430接收UL数据。In addition, using the first, second and fourth parts 411, 413 and 417 of the UL subframe 410, the
利用DL子帧400的第一和第四部分401和407，第一组RS 430向其覆盖区域内的MS发送DL数据。其后，利用第二部分403，第一组RS 430向第二组中所包括的下一跳RS 440发送DL数据。此外，利用第三部分405，第一组RS 430从第二组中所包括的前一跳RS接收DL数据。换言之，第一组RS 430利用第三部分405将接收自BS的数据中继到上游RS，或者利用第四部分407将该数据中继到MS。如果第一组RS 430是1跳RS，则该1跳RS利用第三部分405从BS420接收DL数据。Using the first and fourth parts 401 and 407 of the DL subframe 400, the first set of
利用UL子帧410的第一和第四部分411和417，第一组RS 430从MS接收UL数据。其后，利用第二部分413，第一组RS 430从第二组中所包括的下一跳RS 440接收UL数据。利用第三部分415，第一组RS 430将UL数据发送到第二组中所包括的前一跳RS。这里，如果第一组RS 430是1跳RS，则该1跳RS利用第三部分415向BS420发送DL数据。Using the first and fourth parts 411 and 417 of the UL subframe 410, the first set of
利用DL子帧400的第一和第四部分401和407，第二组RS 440向其覆盖区域内的MS发送DL数据。其后，利用第二部分403，第二组RS 440从第一组中所包括的前一跳RS 430接收DL数据。利用第三部分405，第二组RS 440向第一组中所包括的下一跳RS发送DL数据。换言之，利用第四部分407，第二组RS 440将利用第二部分403接收自上游RS的数据中继到MS。Using the first and fourth parts 401 and 407 of the DL subframe 400, the second set of
利用UL子帧410的第一和第四部分411和417，第二组RS 440从MS接收UL数据。其后，利用第二部分413，第二组RS 440将UL数据发送到第一组中所包括的前一跳RS 430。利用第三部分415，第二组RS 440从包括在第一组中的下一跳RS接收UL数据。Using the first and fourth parts 411 and 417 of the UL subframe 410, the second set of
接下来，将描述用于使用包括三个中继业务部分的子帧在无线通信系统中执行通信的方法。在下列描述中，假设将第二部分303/313、第四部分307/317、以及第五部分309/319用作三个中继业务部分。Next, a method for performing communication in a wireless communication system using a subframe including three relay traffic parts will be described. In the following description, it is assumed that the second part 303/313, the fourth part 307/317, and the fifth part 309/319 are used as three relay traffic parts.
为了支持中继业务，通过使用第一部分301/311、第二部分303/313、第四部分307/317以及第五部分309/319，无线通信系统的BS和RS可以如图5所示地进行操作。顺序地标记图5中的子帧部分，其与图3中的子帧部分的标记无关。例如，第一部分301/311相当于图5中的第一部分501/511，以及图3中的第四部分307/317相当于图5中的第二部分503/513。此外，图3中的第二部分303/313相当于图5中的第三部分505/515，以及图3中的第五部分309/319相当于图5中的第四部分507/517。In order to support the relay service, by using the first part 301/311, the second part 303/313, the fourth part 307/317 and the fifth part 309/319, the BS and RS of the wireless communication system can perform operate. The subframe parts in FIG. 5 are labeled sequentially, independently of the labeling of the subframe parts in FIG. 3 . For example, the first part 301/311 corresponds to the
图5示出了使用根据本发明的第二实施例的多跳中继无线通信系统的帧结构的通信过程。FIG. 5 shows a communication process using a frame structure of a multi-hop relay wireless communication system according to a second embodiment of the present invention.
参照图5，该帧包括DL子帧500和UL子帧510。根据时间资源，将DL/UL子帧500/510分成第一部分501/511、第二部分503/513、第三部分505/515和第四部分507/517。Referring to FIG. 5 , the frame includes a DL subframe 500 and a UL subframe 510 . According to the time resource, the DL/UL subframe 500/510 is divided into a
利用DL子帧500的第一、第二和第三部分501、503和505，BS520向其覆盖区域内的MS发送DL数据。其后，利用第四部分507，BS 520将DL数据发送到1跳RS 530(RS1)。Using the first, second and
此外，利用UL子帧510的第一、第二和第三部分511、513和515，BS 520从MS接收UL数据。其后，利用第四部分517，BS 520从第一RS 530接收UL数据。In addition, using the first, second and
利用DL子帧500的第一501，第一RS 530向其覆盖区域内的MS发送DL数据。其后，利用第二部分503，第一RS 530操作于空闲模式。换言之，为了减少与另一RS的干扰，第一RS 530不利用第二部分503提供任何服务。Using the first 501 of the DL subframe 500, the
其后，第一RS 530利用第三部分505向从属的第二RS 540(RS2)发送DL数据，并利用第四部分507从BS 520接收DL数据。Thereafter, the
此外，利用下行链路子帧510的第一部分511，第一RS 530从MS接收UL数据。其后，利用第二部分513，第一RS 530操作于空闲模式。Furthermore, using the
其后，第一RS 530利用第三部分515从第二RS 540接收UL数据，并利用第四部分517向BS 520发送UL数据。Thereafter, the
利用DL子帧500的第一部分501，第二RS 540向其覆盖区域内的MS发送DL数据。其后，第二RS 540利用第二部分503向从属的第三RS 550发送DL数据，并利用第三部分505从第一RS 530接收DL数据(第二RS 540从属于第一RS 530)。Using the
其后，第二RS 540利用第四部分507操作于空闲模式。换言之，为了减少与另一RS的干扰，第二RS 540不利用第四部分507提供任何服务。Thereafter, the
第二RS 540利用UL子帧510的第一部分511从MS接收UL数据。其后，第二RS 540利用第二部分513从第三RS 550(RS3)接收UL数据，并利用第三部分515将UL数据发送到第一RS 530。其后，第二RS 540利用第四部分517操作于空闲模式。The
利用DL子帧500的第一部分501，第三RS 550向其覆盖区域内的MS发送DL数据。其后，第三RS 550利用第二部分503(第三RS550从属于第二RS 540)从第二RS 540接收DL数据，并利用第三部分505操作于空闲模式。换言之，为了避免与另一RS的干扰，第三RS 550不利用第三部分505来提供任何服务。Using the
其后，第三RS 550利用第四部分507向第四RS(RS4)发送UL数据，该第四RS(RS4)从属于第三RS 550。Thereafter, the
第三RS 550利用UL子帧510的第一部分511从MS接收UL数据。其后，第三RS 550利用第二部分513将UL数据发送到第二RS540，并利用第三部分515操作于空闲模式。The
其后，第三RS 550利用第四部分517从第四RS接收UL数据。Thereafter, the
如上所述，通过使用图3中所示的帧结构，该无线通信系统可以支持如图4或5所示的多跳中继业务。该无线通信系统可以选择性地根据小区环境参数(例如，跳的数目)来使用帧结构。因此，无线通信系统中的上游节点向下游节点发送帧信息，使得系统中的所有节点(例如，BS、RS及MS)能够检测该系统的帧结构。这里，上游节点表示BS或上游RS，而下游节点表示下游RS或MS。As mentioned above, by using the frame structure shown in FIG. 3 , the wireless communication system can support the multi-hop relay service as shown in FIG. 4 or 5 . The wireless communication system can selectively use a frame structure according to cell environment parameters (eg, number of hops). Therefore, an upstream node in a wireless communication system sends frame information to a downstream node, so that all nodes (eg, BS, RS, and MS) in the system can detect the frame structure of the system. Here, an upstream node means a BS or an upstream RS, and a downstream node means a downstream RS or an MS.
在下文中，将描述用于在无线通信系统中将帧信息从上游节点发送到下游节点的技术。上游节点可以通过使用下行链路信道描述符(DCD)、介质访问控制(MAC)消息、或包括针对帧信息的信息元素(IE)的MAP消息来将帧信息发送到下游节点。以下描述是基于使用MAP消息来将帧信息从上游节点发送到下游节点的假设。Hereinafter, a technique for transmitting frame information from an upstream node to a downstream node in a wireless communication system will be described. The upstream node may transmit the frame information to the downstream node by using a Downlink Channel Descriptor (DCD), a Medium Access Control (MAC) message, or a MAP message including an Information Element (IE) for the frame information. The following description is based on the assumption that frame information is transmitted from an upstream node to a downstream node using a MAP message.
图6示出了在根据本发明的实施例的多跳中继无线通信系统中BS发送帧信息的过程。FIG. 6 shows a process for a BS to transmit frame information in a multi-hop relay wireless communication system according to an embodiment of the present invention.
参照图6，在步骤601中，BS确定是否从RS接收到初始连接请求信号。Referring to FIG. 6, in
如果从RS接收到初始连接请求信号，则该过程前进到步骤603。在步骤603中，BS产生DL-MAP，其包含关于DL子帧中用于与RS进行通信的中继业务部分的信息。其后，BS将包含该DL-MAP的初始连接信号发送到RS。换言之，BS执行到RS的初始连接。If an initial connection request signal is received from the RS, the process proceeds to step 603 . In
针对到RS的初始连接，BS通过图3中的第一部分301执行到RS的初始连接。因此，在使用第一部分301中的DL-MAP到RS的初始连接之后，BS将关于用于与RS进行通信的中继业务部分(例如，图3中的第二部分)的信息发送到RS。这里，BS以如表1中所示的STC(空时编码)DL_ZONE_IE的格式产生DL-MAP，其包含关于用于与RS进行通信的中继业务部分的信息。在这种情况下，表1包含用于在到RS的初始连接之后与RS进行通信的中继业务部分的开始信息。For the initial connection to the RS, the BS performs the initial connection to the RS through the first part 301 in FIG. 3 . Therefore, after the initial connection to the RS using DL-MAP in the first part 301, the BS transmits information on the relay service part (eg, the second part in FIG. 3 ) for communicating with the RS to the RS. Here, the BS generates the DL-MAP in the format of STC (Space Time Coding) DL_ZONE_IE as shown in Table 1, which contains information on a relay traffic part for communicating with the RS. In this case, Table 1 contains the start information of the relay traffic part for communicating with the RS after the initial connection to the RS.
表1Table 1
这里，STC_DL_ZONE_IE包含：有关OFDMA符号偏移的信息，用于指示与通过BS初始连接的RS进行通信的中继业务部分的开始点；以及有关指示符的信息，用于指示STC_DL_ZONE_IE包含关于与RS进行通信的中继业务部分的信息。因此，在接收到STC_DL_ZONE_IE时，RS根据该指示符信息检测STC_DL_ZONE_IE包含有关用于与RS进行通信的中继业务部分的信息。在这一点上，BS覆盖区域内的MS根据指示符信息检测STC_DL_ZONE_IE包含有关分配给另一MS的部分的信息。Here, the STC_DL_ZONE_IE contains: information on the OFDMA symbol offset indicating the start point of the relay service part for communication with the RS initially connected through the BS; and information on the indicator indicating that the STC_DL_ZONE_IE contains information on the Information on the relay service portion of the communication. Therefore, upon receiving the STC_DL_ZONE_IE, the RS detects from the indicator information that the STC_DL_ZONE_IE contains information about the trunk traffic part used for communication with the RS. At this point, MSs within the coverage area of the BS detect that the STC_DL_ZONE_IE contains information on a section allocated to another MS from the indicator information.
在上述实施例中，BS通过重新使用在电气和电子工程师协会(IEEE)802.16e中如表1所示地定义的STC_DL_ZONE_IE来向RS发送关于中继业务子帧部分的信息。In the above-described embodiments, the BS transmits information on the relay traffic subframe section to the RS by reusing the STC_DL_ZONE_IE defined in Institute of Electrical and Electronics Engineers (IEEE) 802.16e as shown in Table 1.
在另一实施例中，BS通过使用如表2所示地定义的新消息来向RS发送关于中继业务子帧部分的信息。在这种情况下，BS能够产生DL消息和UL消息。在这种情况下，表2包含关于用于初始连接到RS之后与RS进行通信的中继业务部分的信息。In another embodiment, the BS transmits information on the relay traffic subframe portion to the RS by using a new message defined as shown in Table 2. In this case, the BS can generate DL messages and UL messages. In this case, Table 2 contains information on the relay service part used for communicating with the RS after initial connection to the RS.
表2Table 2
这里，用于发送帧信息的消息包含：‘帧编号’信息，用于使用消息中所包含的帧信息来指示帧开始通信；‘区域数目’信息，用于指示UL/DL子帧中所包含的部分的数目；‘区域收发机模式’信息，用于指示操作UL/DL子帧中的中继业务部分的方法；‘OFDMA符号偏移’信息，用于指示中继业务部分的开始点；‘持续时间’信息，用于指示中继业务部分的长度；‘存在的amble’信息，用于指示中继业务部分中是否包括synch信道；以及‘存在的FCH/MAP’信息，用于指示中继业务部分中是否包括控制消息(即，帧控制报头和映射)。Here, the message used to send the frame information includes: 'frame number' information, used to indicate frame start communication using the frame information contained in the message; 'area number' information, used to indicate The number of sections; 'regional transceiver mode' information, used to indicate the method of operating the relay service section in the UL/DL subframe; 'OFDMA symbol offset' information, used to indicate the start point of the relay service section; The 'duration' information is used to indicate the length of the relay service part; the 'existing amble' information is used to indicate whether the synch channel is included in the relay service part; and the 'existing FCH/MAP' information is used to indicate the Whether to include control messages (that is, frame control headers and mappings) in the follow-up service part.
在表2中，‘区域收发机模式’信息可以包括关于TX模式、RX模式或空闲模式的信息，以指示BS和RS利用中继业务部分的操作。In Table 2, 'area transceiver mode' information may include information on TX mode, RX mode, or idle mode to instruct BS and RS to operate with a relay service part.
其后，在步骤605中，BS确定是否完成与RS的初始连接。Thereafter, in
如果完成了与RS的初始连接，则过程前进到步骤607。在步骤607中，BS产生包含针对中继业务的帧信息的MAP消息。其后，BS通过用于与RS进行通信的中继业务部分将该MAP消息发送到RS。If the initial connection with the RS is complete, the process proceeds to step 607. In
如果无线通信系统使用两跳，则BS产生包含针对中继业务用于与RS的通信的UL子帧部分信息的RS UL MAP消息。例如，BS产生包含关于图3中的第二部分313的信息的RS UL MAP消息。这里，BS以表3所示的UL-ZONE-IE格式产生包含UL部分信息的RS ULMAP消息。If the wireless communication system uses two hops, the BS generates an RS UL MAP message containing UL subframe part information for relay traffic for communication with the RS. For example, the BS generates an RS UL MAP message containing information about the second part 313 in FIG. 3 . Here, the BS generates the RS ULMAP message including UL part information in the UL-ZONE-IE format shown in Table 3.
表3table 3
这里，UL-ZONE-IE包含‘OFDMA符号偏移’信息，用于指示BS针对中继业务用于与RS进行通信的部分的开始点。Here, the UL-ZONE-IE contains 'OFDMA Symbol Offset' information for indicating the start point of a section that the BS uses to communicate with the RS for relay traffic.
在上述实施例中，BS通过重新使用在IEEE 802.16e中如表3所示定义的UL-ZONE-IE，将关于中继业务子帧部分的信息发送到RS。在另一实施例中，BS通过使用如表2所示的新消息来向RS发送关于中继业务子帧部分的信息。In the above embodiment, the BS transmits the information on the subframe part of the relay service to the RS by reusing the UL-ZONE-IE defined in IEEE 802.16e as shown in Table 3. In another embodiment, the BS transmits information on the subframe portion of the relay traffic to the RS by using a new message as shown in Table 2.
其后，BS通过用于与RS进行通信的中继业务部分将所产生的UL MAP消息发送到RS。Thereafter, the BS transmits the generated UL MAP message to the RS through a relay service part for communicating with the RS.
如果无线通信系统使用三个或更多跳，则BS产生包含针对中继业务用于与RS的通信的UL/DL子帧部分信息的MAP消息。例如，如果该RS使用图3中的第四部分307或第五部分309来与下游RS进行通信，则BS使用第二部分303的RS DL MAP来将关于第四部分307或第五部分309的信息发送到RS。这里，RS DL MAP如表1或表2所示地构成。If the wireless communication system uses three or more hops, the BS generates a MAP message containing UL/DL subframe part information for relay traffic for communication with the RS. For example, if the RS uses the fourth part 307 or the fifth part 309 in FIG. 3 to communicate with the downstream RS, the BS uses the RS DL MAP of the second part 303 to transfer The information is sent to RS. Here, the RS DL MAP is constituted as shown in Table 1 or Table 2.
此外，BS产生RS UL MAP，包含针对中继业务用于与RS的通信的UL子帧部分信息以及用于与下游RS的通信的UL子帧部分信息。这里，RS UL MAP如表2或表3所示地构成。In addition, the BS generates the RS UL MAP, which includes UL subframe part information for relay service for communication with the RS and UL subframe part information for communication with the downstream RS. Here, the RS UL MAP is configured as shown in Table 2 or Table 3.
其后，BS通过针对中继业务用于与RS的通信的部分来将DLMAP和UL MAP发送到RS。Thereafter, the BS transmits the DL MAP and the UL MAP to the RS by a part used for communication with the RS for relay traffic.
BS使用在步骤607中发送的中继业务部分信息来与RS进行通信。在步骤609中，BS确定该子帧部分信息是否改变。The BS communicates with the RS using the relay traffic part information transmitted in
如果该子帧部分信息改变(步骤609)，则过程前进到步骤611。在步骤611中，BS产生包含改变的子帧部分信息的消息。例如，BS以信息元素(IE)的格式产生包含改变的子帧部分信息的MAP消息。在另一实施例中，BS产生包含改变的子帧部分信息的中继帧控制报头(R-FCH)。在又一实施例中，BS产生包含改变的子帧部分信息的MAC消息或下行链路信道描述符(DCD)消息。If the subframe portion information is changed (step 609), the process proceeds to step 611. In
在步骤613中，BS产生并将用于与RS进行通信的部分的子帧发送到RS，该子帧包括消息，该消息包含改变的信息。其后，BS通过RS使用在帧改变时间处改变的帧结构来提供中继业务。In
然而，如果该子帧部分信息没有改变(步骤609)，则过程前进到步骤613，其中BS产生帧，并与RS进行通信。However, if the subframe portion information has not changed (step 609), the process proceeds to step 613, where the BS generates a frame and communicates with the RS.
其后，该过程结束。Thereafter, the process ends.
图7示出了在根据本发明的多跳中继无线通信系统中RS从BS接收帧信息的过程。FIG. 7 shows a process for an RS to receive frame information from a BS in a multi-hop relay wireless communication system according to the present invention.
参照图7，在步骤701中，RS通过经由BS的sync信道广播获取与BS的同步。Referring to FIG. 7, in
在步骤703中，RS向BS发送初始连接请求信号。例如，RS通过图3中的第一部分301向BS发送初始连接请求信号。In
在步骤705中，RS确定是否从BS接收到初始连接信号。In
如果从BS接收到了初始连接，则该过程前进到步骤707，在步骤707中，RS根据接收信号中所包含的DL-MAP检测DL子帧部分信息，该DL子帧部分信息用于在初始连接之后从BS接收中继业务的数据。例如，RS根据通过图3中的第一部分301接收到的DL-MAP检测关于第二部分303的信息，该信息用于在初始连接之后与BS进行通信以实现中继业务。If the initial connection is received from the BS, the process proceeds to step 707. In
在步骤709中，RS确定是否完成了与BS的初始连接。In
如果完成了与BS的初始连接，则过程前进到步骤711，其中RS确定是否通过用于与BS进行通信的中继业务部分来从BS接收信号。例如，RS确定是否通过图3中的第二部分303从BS接收信号。If the initial connection with the BS is completed, the process proceeds to step 711, where the RS determines whether to receive a signal from the BS through a relay service part for communicating with the BS. For example, the RS determines whether to receive a signal from the BS through the second part 303 in FIG. 3 .
如果从BS接收到信号，则过程前进到步骤713，其中RS从接收到的信号中获取针对中继业务用于与BS的通信的UL/DL子帧部分信息。例如，RS从接收信号中所包含的RS帧控制报头中获取针对中继业务用于与BS的通信的DL子帧部分(例如，第二部分303)信息。在另一实施例中，RS从RS DL MAP中获取针对中继业务用于与BS的通信的DL子帧部分信息。在这一点上，RS还可以从RS DL MAP中获取用于与下游RS进行通信的DL子帧部分信息。If a signal is received from the BS, the process proceeds to step 713, where the RS acquires UL/DL subframe portion information for relay traffic for communication with the BS from the received signal. For example, the RS acquires the information of the DL subframe part (for example, the second part 303 ) used for communication with the BS for the relay service from the RS frame control header contained in the received signal. In another embodiment, the RS obtains the information of the DL subframe part used for the communication with the BS for the relay service from the RS DL MAP. At this point, the RS can also obtain the DL subframe part information for communicating with the downstream RS from the RS DL MAP.
此外，RS从RS DL MAP中获取用于与BS进行通信的UL子帧部分信息以及针对中继业务用于与下游RS的通信的UL子帧部分信息。In addition, the RS obtains the UL subframe part information for communicating with the BS and the UL subframe part information for communicating with the downstream RS for the relay service from the RS DL MAP.
在又一实施例中，RS从MAC消息或DCD消息中获取用于与BS进行通信的子帧部分信息以及针对中继业务用于与下游RS的通信的子帧部分信息。In yet another embodiment, the RS obtains the subframe part information used for communicating with the BS and the subframe part information used for communicating with the downstream RS for the relay service from the MAC message or the DCD message.
在获取了针对中继业务的帧信息之后，RS使用所获取的帧信息来根据接收自BS的开始帧信息来执行来自开始帧的中继业务。After acquiring the frame information for the relay traffic, the RS performs the relay traffic from the start frame according to the start frame information received from the BS using the acquired frame information.
其后，该过程结束。Thereafter, the process ends.
图8示出了在根据本发明的多跳中继无线通信系统中上游RS向下游RS发送帧信息的过程。FIG. 8 shows the process of sending frame information from an upstream RS to a downstream RS in a multi-hop relay wireless communication system according to the present invention.
参照图8，在步骤801中，上游RS确定是否从下游RS接收到初始连接请求信号。Referring to FIG. 8, in
如果从下游RS接收到的初始连接请求信号，则过程前进到步骤803，其中上游RS在DL子帧中产生包含关于用于与下游RS进行通信的中继业务部分的信息的DL-MAP。其后，上游RS将包含DL-MAP的初始连接信号发送到RS。换言之，上游RS执行到下游RS的初始连接。If the initial connection request signal is received from the downstream RS, the process proceeds to step 803, where the upstream RS generates a DL-MAP containing information on a relay traffic part for communicating with the downstream RS in a DL subframe. Thereafter, the upstream RS sends an initial connection signal including DL-MAP to the RS. In other words, the upstream RS performs initial connection to the downstream RS.
为了到下游RS的初始连接，上游RS通过图3中的第一部分301执行到下游RS的初始连接。因此，在使用第一部分301中的DL-MAP初始连接到下游RS之后，上游RS将关于用于与下游RS进行通信的中继业务部分(例如，第四部分307或第五部分309)的信息发送到下游RS。这里，上游RS以如表1或表2所示的格式产生包含用于与下游RS进行通信的中继业务部分的信息的控制消息，并将所产生的控制消息发送到下游RS。For initial connection to the downstream RS, the upstream RS performs initial connection to the downstream RS through the first part 301 in FIG. 3 . Therefore, after initial connection to the downstream RS using DL-MAP in the first part 301, the upstream RS will have information about the part of the relay traffic (e.g., the fourth part 307 or the fifth part 309) used to communicate with the downstream RS Sent to downstream RS. Here, the upstream RS generates a control message including information of a relay traffic part for communicating with the downstream RS in a format as shown in Table 1 or Table 2, and transmits the generated control message to the downstream RS.
其后，在步骤805中，上游RS确定是否完成与下游RS的初始连接。Thereafter, in
如果完成了与下游RS的初始连接，则过程前进到步骤807，其中上游RS产生包含针对中继业务的帧信息的MAP消息。其后，上游RS通过用于与下游RS进行通信的中继业务部分将MAP消息发送到下游RS。例如，上游RS产生包含针对中继业务用于与下游RS的通信的DL子帧部分信息的RS DL MAP。这里，RS DL MAP如表1或表2所示地构成。RS DL MAP还可以包含用于与从属于该下游RS的另一下游RS进行通信的DL部分信息。If the initial connection with the downstream RS is completed, the process proceeds to step 807, where the upstream RS generates a MAP message containing frame information for relay traffic. Thereafter, the upstream RS sends the MAP message to the downstream RS through the relay service part for communicating with the downstream RS. For example, an upstream RS generates an RS DL MAP containing information on a part of a DL subframe used for communication with a downstream RS for relay traffic. Here, the RS DL MAP is constituted as shown in Table 1 or Table 2. The RS DL MAP may also contain DL part information for communicating with another downstream RS subordinate to the downstream RS.
此外，上游RS产生包含针对中继业务用于与下游RS的通信的UL子帧部分信息的RS UL MAP。这里，RS UL MAP如表2或表3所示地构成。RS UL MAP还可以包含用于与从属于该下游RS的另一下游RS进行通信的UL部分信息。In addition, the upstream RS generates RS UL MAP containing UL subframe part information for relay traffic for communication with the downstream RS. Here, the RS UL MAP is configured as shown in Table 2 or Table 3. The RS UL MAP may also contain UL part information for communicating with another downstream RS subordinate to the downstream RS.
在步骤809中，上游RS确定子帧部分信息是否改变。In
如果该子帧部分信息改变(步骤809)，则过程前进到步骤811，其中上游RS产生包含改变的子帧部分信息的消息。例如，上游RS以信息元素(IE)的格式产生包含改变的子帧部分信息的MAP消息。在另一实施例中，上游RS产生包含改变的子帧部分信息的R-FCH。在又一实施例中，上游RS产生包含改变的子帧部分信息的MAC消息或DCD消息。If the subframe part information is changed (step 809), the process proceeds to step 811, where the upstream RS generates a message containing the changed subframe part information. For example, the upstream RS generates a MAP message containing changed subframe part information in the format of an Information Element (IE). In another embodiment, the upstream RS generates the R-FCH including the changed subframe part information. In yet another embodiment, the upstream RS generates a MAC message or a DCD message including the changed subframe part information.
在步骤813中，上游RS产生用于与下游RS进行通信的部分的子帧并将其发送到下游RS，该子帧包括包含改变的信息的消息。其后，上游RS通过下游RS使用在帧改变时间处改变的帧结构来提供中继业务。In
然而，如果该子帧部分信息没有改变(步骤809)，则过程前进到步骤813，其中上游RS产生帧，并与下游RS进行通信。However, if the subframe portion information has not changed (step 809), the process proceeds to step 813, where the upstream RS generates a frame and communicates with the downstream RS.
其后，该过程结束。Thereafter, the process ends.
图9示出了在根据本发明的多跳中继无线通信系统中下游RS从上游RS接收帧信息的过程。FIG. 9 shows a process in which a downstream RS receives frame information from an upstream RS in a multi-hop relay wireless communication system according to the present invention.
参照图9，在步骤901中，下游RS通过经由上游BS的sync信道广播获取与上游RS的同步。Referring to FIG. 9, in step 901, the downstream RS acquires synchronization with the upstream RS by broadcasting through a sync channel of the upstream BS.
在步骤903中，下游RS向上游RS发送初始连接请求信号。在这一点上，下游RS通过图3中的第一部分301与上游RS进行通信。In step 903, the downstream RS sends an initial connection request signal to the upstream RS. At this point, the downstream RS communicates with the upstream RS through the first part 301 in FIG. 3 .
在步骤905中，下游RS确定是否从上游RS接收到初始连接信号。如果接收到了初始连接信号，则该过程前进到步骤907，其中下游RS从接收信号中所包含的DL-MAP中获取DL子帧部分信息，该DL子帧部分信息用于在初始连接之后从上游RS接收中继业务的数据。例如，RS从接收信号中所包含的如表1或表2所示的格式的DL-MAP中获取关于第四部分307或第五部分309的信息。如果RS是3跳RS，则该RS从图3的帧结构中获取关于第二部分303的信息。In step 905, the downstream RS determines whether an initial connection signal is received from the upstream RS. If an initial connection signal is received, the process proceeds to step 907, where the downstream RS obtains DL subframe part information from the DL-MAP contained in the received signal, which is used to obtain the DL subframe part information from the upstream RS after the initial connection. The RS receives the data of the relay service. For example, the RS acquires information about the fourth part 307 or the fifth part 309 from the DL-MAP in the format shown in Table 1 or Table 2 included in the received signal. If the RS is a 3-hop RS, the RS acquires information about the second part 303 from the frame structure of FIG. 3 .
在步骤909中，下游RS确定是否完成了与上游RS的初始连接。In step 909, the downstream RS determines whether the initial connection with the upstream RS is completed.
如果完成了与上游RS的初始连接，则过程前进到步骤911，其中下游RS确定是否通过用于与上游RS进行通信的中继业务部分来从上游RS接收信号。If the initial connection with the upstream RS is completed, the process proceeds to step 911, where the downstream RS determines whether to receive a signal from the upstream RS through a relay traffic part for communicating with the upstream RS.
如果从上游RS接收到信号，则过程前进到步骤913，其中下游RS根据接收到的信号检测针对中继业务用于与上游RS的通信的UL/DL子帧部分信息。例如，下游RS根据接收信号中所包含的RS帧控制报头来检测针对中继业务用于与上游RS的通信的DL子帧部分(例如，第四部分307或第五部分309)信息。在另一实施例中，下游RS根据RS DL MAP来检测针对中继业务用于与上游RS的通信的DL子帧部分信息。在这一点上，下游RS还可以根据RS DL MAP来检测用于与下游RS进行通信的DL子帧部分信息。If a signal is received from the upstream RS, the process proceeds to step 913, where the downstream RS detects UL/DL subframe portion information for relay traffic for communication with the upstream RS from the received signal. For example, the downstream RS detects the DL subframe part (for example, the fourth part 307 or the fifth part 309 ) information for relay traffic used for communication with the upstream RS according to the RS frame control header contained in the received signal. In another embodiment, the downstream RS detects the DL subframe part information used for communication with the upstream RS for the relay service according to the RS DL MAP. At this point, the downstream RS can also detect part of the DL subframe information for communicating with the downstream RS according to the RS DL MAP.
此外，下游RS根据RS UL MAP来检测用于与上游RS进行通信的UL子帧部分信息以及针对中继业务用于与下游RS的通信的UL子帧部分信息。这里，用于RS与下游RS进行通信的子帧部分与用于上游RS与从属于该上游RS的另一上游RS进行通信的部分相同。In addition, the downstream RS detects UL subframe partial information for communication with the upstream RS and UL subframe partial information for relay traffic with the downstream RS according to the RS UL MAP. Here, a subframe portion for an RS to communicate with a downstream RS is the same as a portion for an upstream RS to communicate with another upstream RS subordinate to the upstream RS.
在又一实施例中，RS从MAC消息或DCD消息中获取用于与上游RS进行通信的子帧部分信息以及针对中继业务用于与下游RS的通信的子帧部分信息。In yet another embodiment, the RS obtains the subframe part information used for communicating with the upstream RS and the subframe part information for the relay service used for communicating with the downstream RS from the MAC message or the DCD message.
在获取了针对中继业务的帧信息之后，下游RS使用所获取的帧信息，根据接收自上游RS的开始帧信息来执行来自开始帧的中继业务。After acquiring the frame information for the relay traffic, the downstream RS uses the acquired frame information to perform the relay traffic from the start frame according to the start frame information received from the upstream RS.
其后，该过程结束。Thereafter, the process ends.
在上述实施例中，BS或上游RS将针对中继业务的部分信息发送到下游RS。在下游RS的初始连接处，BS或上游RS通过使用用于与MS进行通信的部分的DL-MAP，来将关于中继业务部分的开始点以及长度的信息发送到下游RS。In the above embodiments, the BS or the upstream RS sends part of the information for the relay service to the downstream RS. At the initial connection of the downstream RS, the BS or the upstream RS transmits information on the start point and length of the relay traffic part to the downstream RS by using the DL-MAP for the part communicating with the MS.
在另一实施例中，在下游RS的初始连接处，BS或上游RS通过使用DL-MAP向下游RS提供仅关于中继业务部分的开始点的信息。在初始连接之后，BS或上游RS可以通过使用中继业务部分控制消息(例如，RS DL MAP)来将关于中继业务部分的长度的信息发送到下游RS。In another embodiment, at the initial connection of the downstream RS, the BS or the upstream RS provides information on only the starting point of the relay traffic part to the downstream RS by using DL-MAP. After the initial connection, the BS or the upstream RS can transmit information on the length of the relay traffic part to the downstream RS by using a relay traffic part control message (for example, RS DL MAP).
因此，在初始连接处，下游RS仅从BS或上游RS处获取中继业务部分的开始点信息。在初始连接之后，下游RS可以根据开始点信息通过RS DL MAP获取中继业务部分的长度信息。这里，RS DL MAP可以包含下一帧中的中继业务部分的开始点信息。Therefore, at the initial connection, the downstream RS only obtains the starting point information of the relay service part from the BS or the upstream RS. After the initial connection, the downstream RS can obtain the length information of the relay service part through the RS DL MAP according to the starting point information. Here, the RS DL MAP may contain the starting point information of the relay service part in the next frame.
在下文中，将描述用于在无线通信系统中发送帧信息的BS和RS的方框图。BS和RS具有相同的方框图，因此将只描述RS的方框图。Hereinafter, block diagrams of a BS and an RS for transmitting frame information in a wireless communication system will be described. BS and RS have the same block diagram, so only the block diagram of RS will be described.
图10示出了根据本发明的多跳中继无线通信系统中的RS。FIG. 10 shows an RS in a multi-hop relay wireless communication system according to the present invention.
参照图10，RS包括接收(RX)射频(RF)处理器1001、模拟数字转换器(ADC)1003、正交频分复用(OFDM)解调器1005、解码器1007、消息处理器1009、控制器1011、消息发生器1013、编码器1015、OFDM调制器1017、数字模式转换器(DAC)1019、发送(TX)RF处理器1021、开关1023、以及定时控制器1025。Referring to Figure 10, the RS includes a receive (RX) radio frequency (RF)
定时控制器1025基于帧同步控制开关1023的切换操作。例如，在帧的RX部分，定时控制器1025控制开关1023，使得天线连接到RX RF处理器1001。在帧的TX部分，定时控制器1025控制开关1023，使得天线连接到TX RF处理器1021。The
在帧的RX部分，RX RF处理器1001将通过天线接收到的RF信号转换成基带模拟信号。ADC 1003对接收自RX RF处理器1001的模拟信号进行采样，以便将该模拟信号转换成采样数据(数字信号)。OFDM解调器1005对采样数据进行快速傅立叶变换(FFT)处理，以输出频域数据。During the RX portion of the frame, the
解码器1007从该频域数据中选择有用子载波的数据。解码器1007以预定调制和编码方案(MCS)电平对所选数据进行解调和解码。The
消息处理器1009对来自解码器1007的控制消息进行处理，并将处理结果提供给控制器1011。例如，在初始连接时，消息处理器1009给控制器1011提供包含来自接收自BS或上游RS的控制消息的帧信息的DL MAP。此外，在初始连接之后，消息处理器1009给控制器1011提供包含来自通过针对中继业务的部分接收自BS或上游RS的控制消息的帧信息的控制消息(R-FCH、R-DL-MAP或R-UL-MAP)。The
控制器1011通过分析接收自消息处理器1009的信息来获取帧信息。例如，在初始连接处，控制器1011从DL MAP中获取用于与BS或上游RS进行通信的DL部分的开始信息。在初始连接之后，控制器1011从通过中继业务部分接收到的控制消息中获取针对中继业务用于与BS或上游RS的通信的帧信息。此外，控制器1011从通过中继业务部分接收到的控制消息中获取用于与下游RS进行通信的帧信息。The
在TX部分中，消息发生器1013使用接收自控制器1011的各种信息产生消息，并将该消息提供给物理层的编码器1015。例如，在用于向下游RS提供帧信息的下游RS连接处，消息发生器1013产生包含用于在下游RS的初始连接之后与RS进行通信的子帧部分信息的DL MAP。在初始连接之后，消息发生器1013产生包含针对中继业务用于与下游RS的通信的帧信息的控制消息。In the TX section, the
编码器1015根据MCS电平对接收自消息发生器1013的消息进行编码和调制。OFDM调制器1007对接收自编码器1015的数据进行傅立叶逆变换处理，以输出采样数据(OFDM符号)。DAC 1023将该采样数据转换成模拟信号。TX RF处理器1021将接收自DAC 1023的基带模拟信号转换成通过天线发送的RF信号。The
在用于执行RX/TX部分的操作的模块之中，除了消息发生器1013之外，BS的所有模块都以与RS相同的模式操作。Among the modules for performing the operation of the RX/TX part, except for the
消息发生器1013产生用于将帧信息发送到RS的消息。例如，在初始连接处，消息发生器1013产生包含DL子帧部分信息的DL MAP，以便在初始连接之后用于针对中继业务的与RS的通信。The
在初始连接之后，消息发生器1013产生包含帧信息的控制消息，用于针对中继业务与RS的通信。即就是，消息发生器1013产生包含DL子帧部分信息的RS帧报头(R-FCH)，用于在下一帧中针对中继业务与RS的通信。此外，消息发生器1013产生包含UL子帧部分信息的RS UL MAP，用于针对中继业务与RS的通信。如果无线通信系统使用三个或更多跳，则消息发生器1013产生包含DL子帧部分信息的RS DL MAP，用于RS与下游RS的通信。此外，消息发生器1013产生包含UL子帧部分信息的RS UL MAP，用于RS与下游RS的通信。After the initial connection, the
这里，用于将帧信息从BS或上游RS发送到下游RS以实现中继业务的控制消息包含在上述控制消息中所包含的帧部分信息以及在子帧部分中所包含的sync信道的位置信息。Here, the control message for transmitting frame information from the BS or the upstream RS to the downstream RS to realize the relay service includes the frame part information contained in the above control message and the position information of the sync channel contained in the subframe part .
在上述实施例中，BS或上游RS以信息元素的格式构成包含中继业务部分信息的MAP，并将所构成的MAP发送到下游RS。在另一实施例中，当BS或上游RS使用MAC消息或DCD消息发送中继业务部分信息时，可以以如表2所示的格式构成MAC消息或DCD消息。In the above embodiments, the BS or the upstream RS constructs the MAP including the relay service part information in the format of information elements, and sends the constructed MAP to the downstream RS. In another embodiment, when the BS or the upstream RS uses the MAC message or the DCD message to send the relay service part information, the format shown in Table 2 may be used to form the MAC message or the DCD message.
如上所述，本发明根据小区环境参数，在多跳无线通信系统中发送并检测中继业务部分信息，由此使得可以根据小区环境参数自适应地构成帧，并根据所构成的帧信息准确地对相应的帧信息进行解码。As described above, the present invention transmits and detects relay service part information in a multi-hop wireless communication system according to cell environment parameters, thereby making it possible to adaptively construct frames according to cell environment parameters, and accurately The corresponding frame information is decoded.
尽管已经参考本发明的特定优选实施例说明并描述了本发明，本领域的技术人员将理解，在不背离所附权利要求所限定的本发明的精神和范围的前提下，可以在形式和细节上对本发明进行各种改变。Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that changes in form and details may be made without departing from the spirit and scope of the invention as defined by the appended claims. Various changes are made to the present invention above.
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| KR2007-0012979 | 2007-02-08 | ||
| KR1020070012979AKR100972957B1 (en) | 2007-01-08 | 2007-02-08 | Frame information transmission apparatus and method in a multi-hop relay broadband wireless access communication system |
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| WO2010102564A1 (en)* | 2009-03-13 | 2010-09-16 | 富士通株式会社 | Base station |
| WO2011014991A1 (en)* | 2009-08-06 | 2011-02-10 | 上海贝尔股份有限公司 | Method for configuring frame structures and corresponding base station, user equipment and communication system |
| CN102550112A (en)* | 2009-10-15 | 2012-07-04 | 高通股份有限公司 | Methods and apparatus for transport block size determination applying an adjustment factor |
| CN107769834A (en)* | 2017-09-30 | 2018-03-06 | 中兴克拉科技（苏州）有限公司 | A kind of LoRaWAN Internet of Things signal trunking method |
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| KR20090030562A (en) | 2007-09-20 | 2009-03-25 | 엘지전자 주식회사 | Packet Transmission Method for Resource Allocation in Broadband Wireless Access System |
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| JP4494134B2 (en)* | 2004-09-01 | 2010-06-30 | Ｋｄｄｉ株式会社 | Wireless communication system, relay station apparatus and base station apparatus |
| CN100450281C (en)* | 2005-03-31 | 2009-01-07 | 西门子（中国）有限公司 | A method for accessing a distributed multi-hop wireless network |
- 2007
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010102564A1 (en)* | 2009-03-13 | 2010-09-16 | 富士通株式会社 | Base station |
| CN101835194B (en)* | 2009-03-13 | 2013-01-23 | 富士通株式会社 | base station |
| WO2011014991A1 (en)* | 2009-08-06 | 2011-02-10 | 上海贝尔股份有限公司 | Method for configuring frame structures and corresponding base station, user equipment and communication system |
| CN102449930A (en)* | 2009-08-06 | 2012-05-09 | 上海贝尔股份有限公司 | Method for configuring frame structures and corresponding base station, user equipment and communication system |
| CN102550112A (en)* | 2009-10-15 | 2012-07-04 | 高通股份有限公司 | Methods and apparatus for transport block size determination applying an adjustment factor |
| US9030977B2 (en) | 2009-10-15 | 2015-05-12 | Qualcomm Incorporated | Methods and apparatus for transport block size determination |
| CN102550112B (en)* | 2009-10-15 | 2016-04-27 | 高通股份有限公司 | For the method and apparatus that the transmission block size applying Dynamic gene is determined |
| CN107769834A (en)* | 2017-09-30 | 2018-03-06 | 中兴克拉科技（苏州）有限公司 | A kind of LoRaWAN Internet of Things signal trunking method |
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| KR100972957B1 (en) | 2010-07-29 |
| CN101222264B (en) | 2015-09-02 |
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