CN102036385A - Method for scheduling resources among cells, base stations, user equipment and mobile communication system - Google Patents
Method for scheduling resources among cells, base stations, user equipment and mobile communication systemDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及3GPP LTE-A中多点协同发送和接收技术，特别是一种小区间资源调度方法、基站、用户设备及移动通信系统。The present invention relates to multi-point coordinated transmission and reception technology in 3GPP LTE-A, in particular to a resource scheduling method between cells, a base station, user equipment and a mobile communication system.
背景技术Background technique
多点协同发送和接收是LTE-A系统中控制小区间干扰的一项关键技术，其实现了多小区间的联合发送和接收，可以有效地控制或消除相邻小区间的干扰，特别对于小区边界用户性能的提高是一项关键技术。具体地，根据传输技术复杂度的高低和反馈开销多少，上述技术又可以分为协调调度，协调波束赋形和联合处理技术。联合处理技术有可以进一步分为联合发送技术和动态小区选择技术。Multi-point coordinated transmission and reception is a key technology for controlling inter-cell interference in the LTE-A system. It realizes joint transmission and reception between multiple cells, and can effectively control or eliminate interference between adjacent cells, especially for cells The improvement of edge user performance is a key technology. Specifically, according to the complexity of the transmission technology and the amount of feedback overhead, the above technologies can be further divided into coordinated scheduling, coordinated beamforming and joint processing technologies. Joint processing technology can be further divided into joint transmission technology and dynamic cell selection technology.
在动态小区选择技术下，信号只从选定的一个基站发送，用户也只需要反馈选定基站的信道信息，因此，动态小区选择技术是一种以较低的发射技术的复杂度，较低的用户上行信道反馈开销，来实现一定的小区间干扰协调的技术，它平衡了传输技术的复杂度，反馈开销和小区间干扰协调的效果，是一项比较灵活的技术。Under the dynamic cell selection technology, the signal is only sent from a selected base station, and the user only needs to feed back the channel information of the selected base station. Therefore, the dynamic cell selection technology is a low-complexity transmission technology, low The user uplink channel feedback overhead to achieve a certain inter-cell interference coordination technology, which balances the complexity of transmission technology, feedback overhead and the effect of inter-cell interference coordination, is a relatively flexible technology.
传统的动态小区选择技术中，用户设备针对每一个资源块(Resource Block，RB)，根据下行测量值计算激活集(Active Set)中每个基站在该资源块上的下行信噪比，然后对每一个资源块，选择信噪比最大的基站作为在该资源块上进行下行信号发送的基站，并将选择的基站的ID及该基站的下行信道信息反馈给服务基站，在下一个信号发送时刻，将由选择的基站在该资源块上为用户发送下行数据。在传统的动态小区选择技术中，对于每一个资源块用户可以随时选择信道质量最好的基站为它提供服务，因此可以极大的提高系统性能，尤其是小区边界用户的性能。In the traditional dynamic cell selection technology, for each resource block (Resource Block, RB), the user equipment calculates the downlink signal-to-noise ratio of each base station in the active set (Active Set) on the resource block according to the downlink measurement value, and then calculates the For each resource block, select the base station with the largest signal-to-noise ratio as the base station for downlink signal transmission on the resource block, and feed back the ID of the selected base station and the downlink channel information of the base station to the serving base station. At the next signal transmission time, The selected base station will send downlink data for the user on the resource block. In the traditional dynamic cell selection technology, for each resource block, the user can select the base station with the best channel quality to serve it at any time, so the system performance can be greatly improved, especially the performance of the cell border users.
在LTE-A的讨论中，一种动态小区选择结合沉默(Muting)的技术也被提了出来。动态小区选择结合沉默技术通过如下步骤进行通信处理：In the discussion of LTE-A, a technology of dynamic cell selection combined with muting is also proposed. Dynamic cell selection combined with silence technology performs communication processing through the following steps:
首先，根据用户设备测量的服务基站和最强相邻基站的下行参考信号功率值，来判定小区边界用户设备；如果服务基站和信号最强的邻基站的下行参考信号的功率差值在预设门限(比如3dB)内，则判定该用户设备为小区边界用户设备。First, determine the cell boundary user equipment according to the downlink reference signal power values of the serving base station and the strongest neighboring base station measured by the user equipment; if the power difference between the serving base station and the neighboring base station with the strongest signal is within the preset If it is within the threshold (for example, 3dB), it is determined that the user equipment is a cell border user equipment.
其次，小区边界用户设备根据测量值计算瞬时功率次强的小区(也就是相邻小区中的一个)在当前资源块上无信号发送(Muting)时的信噪比，并且将测量值反馈给服务基站。Secondly, the user equipment at the cell border calculates the signal-to-noise ratio of the cell with the second strongest instantaneous power (that is, one of the adjacent cells) when there is no signal transmission (Muting) on the current resource block according to the measured value, and feeds back the measured value to the service base station.
最后，根据用户反馈的信道信息以及小区选择情况，中心基站利用联合调度算法为所有小区内的用户分配资源块，直到某一小区内的总功率分配完毕。Finally, according to the channel information fed back by users and the cell selection situation, the central base station uses a joint scheduling algorithm to allocate resource blocks for users in all cells until the total power allocation in a cell is completed.
其中，在进行资源分配时，对于第一小区的小区边界用户设备，只有当该第一小区和第二小区的同一资源块都可用时才能分配。该第二小区为所述第一小区的邻小区中，所述小区边界用户设备接收到的信号最强的小区；Wherein, when performing resource allocation, for the cell border user equipment of the first cell, only when the same resource block of the first cell and the second cell are available can be allocated. The second cell is the cell with the strongest signal received by the cell border user equipment among the neighboring cells of the first cell;
并且，对于小区边界用户设备，如果被调度上，则在其使用的资源块上，其服务基站以N倍的功率发送信号，而瞬时功率次强的小区在相应的资源块上则不发送信号。And, for cell boundary user equipment, if it is scheduled, its serving base station will transmit signals with N times the power on the resource blocks it uses, while the cell with the second strongest instantaneous power will not transmit signals on the corresponding resource blocks .
动态小区选择加muting的方法进一步提高了小区边界用户的性能，但至少存在如下缺点：The method of dynamic cell selection plus muting further improves the performance of cell border users, but at least has the following disadvantages:
由于其信号最强的相邻小区在相应的资源块上不发送信号，这样虽然提高了小区边界用户的性能，但是却占用了邻小区的资源，会导致系统的吞吐量下降。Since the adjacent cell with the strongest signal does not send a signal on the corresponding resource block, although the performance of the cell boundary user is improved, the resources of the adjacent cell are occupied, which will lead to a decrease in system throughput.
发明内容Contents of the invention
本发明的目的是提供一种小区间资源调度方法、基站、用户设备及移动通信系统，提高系统吞吐量。The purpose of the present invention is to provide a resource scheduling method between cells, a base station, user equipment and a mobile communication system, so as to improve system throughput.
为了实现上述目的，本发明实施例提供了一种小区间资源协调方法，用于基于多点协同发送和接收的移动通信系统，包括：In order to achieve the above object, an embodiment of the present invention provides an inter-cell resource coordination method for a mobile communication system based on coordinated multi-point transmission and reception, including:
步骤11，基于动态小区选择技术，用户设备在资源块上选定第一小区；Step 11, based on the dynamic cell selection technology, the user equipment selects the first cell on the resource block;
步骤12，所述用户设备为所述第一小区的小区边缘用户设备时，所述用户设备计算在所述资源块上的第一吞吐量和第二吞吐量；Step 12, when the user equipment is a cell edge user equipment of the first cell, the user equipment calculates a first throughput and a second throughput on the resource block;
所述第一吞吐量和第二吞吐量分别为所述用户设备在沉默模式和通常模式下利用所述资源块所能达到的吞吐量；The first throughput and the second throughput are throughputs that can be achieved by the user equipment using the resource block in silent mode and normal mode, respectively;
步骤13，所述用户设备判断所述第一吞吐量是否大于第二吞吐量的N倍，获取一判断结果；所述N为沉默模式下，为所述用户设备提供无线通信服务的基站的数量；Step 13, the user equipment judges whether the first throughput is greater than N times the second throughput, and obtains a judgment result; the N is the number of base stations that provide wireless communication services for the user equipment in silent mode ;
步骤14，在所述判断结果指示所述第一吞吐量大于或等于第二吞吐量的N倍时，所述用户设备指示所述第一小区所属基站，在所述资源块上使用沉默模式，否则指示所述第一小区所属基站在所述资源块上不使用沉默模式。Step 14, when the judgment result indicates that the first throughput is greater than or equal to N times the second throughput, the user equipment instructs the base station to which the first cell belongs to use a silent mode on the resource block, Otherwise, instruct the base station to which the first cell belongs not to use the silent mode on the resource block.
上述的小区间资源协调方法，其中，还包括：The above inter-cell resource coordination method further includes:
步骤15，所述用户设备向服务基站反馈与所述第一小区所属基站之间的下行信道的信道信息。Step 15, the user equipment feeds back the channel information of the downlink channel with the base station to which the first cell belongs to the serving base station.
上述的小区间资源协调方法，其中，所述步骤11具体包括：In the above inter-cell resource coordination method, the step 11 specifically includes:
步骤111，针对所述资源块，所述用户设备计算激活集中每个基站在所述资源块上的下行信噪比；Step 111, for the resource block, the user equipment calculates the downlink signal-to-noise ratio of each base station in the active set on the resource block;
步骤112，所述用户设备选择信噪比最大的基站作为利用所述资源块进行的下行信号发送的基站；所述第一小区属于所述信噪比最大的基站。Step 112, the user equipment selects the base station with the largest signal-to-noise ratio as the base station for sending downlink signals using the resource block; the first cell belongs to the base station with the largest signal-to-noise ratio.
步骤113，所述用户设备将选择的基站通知服务基站。Step 113, the user equipment notifies the serving base station of the selected base station.
上述的小区间资源协调方法，其中，还包括：The above inter-cell resource coordination method further includes:
步骤16，基站根据所述用户设备的反馈进行联合资源调度；Step 16, the base station performs joint resource scheduling according to the feedback from the user equipment;
步骤17，基站计算一功率平均值，为A/[B+(N-1)C-D]，A为基站总的发射功率，B为基站的资源块总数目，C为分配给采用沉默模式的用户设备的资源块的数目，D为被沉默的资源块的数目；Step 17, the base station calculates an average power value, which is A/[B+(N-1)C-D], where A is the total transmit power of the base station, B is the total number of resource blocks of the base station, and C is allocated to user equipment in silent mode The number of resource blocks, D is the number of silenced resource blocks;
步骤18，对于不采用沉默模式的用户设备，基站以第一功率进行下行信号的发射，对于采用沉默模式的用户设备，基站以第二功率进行下行信号的发射，所述第一功率为所述功率平均值，所述第二功率为所述功率平均值的N倍。Step 18, for the user equipment that does not use the silent mode, the base station transmits the downlink signal with the first power, and for the user equipment that uses the silent mode, the base station transmits the downlink signal with the second power, the first power is the An average power value, the second power being N times the average power value.
为了实现上述目的，本发明实施例还提供了一种用户设备，用于基于多点协同发送和接收的移动通信系统，所述用户设备包括：In order to achieve the above object, an embodiment of the present invention also provides a user equipment used in a mobile communication system based on coordinated multi-point transmission and reception, the user equipment includes:
小区选择模块，用于基于动态小区选择技术在资源块上选定第一小区；A cell selection module, configured to select a first cell on a resource block based on a dynamic cell selection technology;
吞吐量计算模块，用于在所述用户设备为所述第一小区的小区边缘用户设备时，计算在所述资源块上的第一吞吐量和第二吞吐量；a throughput calculation module, configured to calculate the first throughput and the second throughput on the resource block when the user equipment is a cell edge user equipment of the first cell;
所述第一吞吐量和第二吞吐量分别为所述用户设备在沉默模式和通常模式下利用所述资源块所能达到的吞吐量；The first throughput and the second throughput are throughputs that can be achieved by the user equipment using the resource block in silent mode and normal mode, respectively;
判断模块，用于判断所述第一吞吐量是否大于第二吞吐量的N倍，获取一判断结果；所述N为沉默模式下，为所述用户设备提供无线通信服务的基站的数量；A judging module, configured to judge whether the first throughput is greater than N times the second throughput, and obtain a judgment result; the N is the number of base stations that provide wireless communication services for the user equipment in silent mode;
反馈模块，用于在所述判断结果指示所述第一吞吐量大于或等于第二吞吐量的N倍时，指示所述第一小区所属基站，在所述资源块上使用沉默模式，否则指示所述第一小区所属基站在所述资源块上不使用沉默模式。A feedback module, configured to instruct the base station to which the first cell belongs to use the silent mode on the resource block when the judgment result indicates that the first throughput is greater than or equal to N times the second throughput, otherwise instruct The base station to which the first cell belongs does not use a silent mode on the resource block.
为了实现上述目的，本发明实施例还提供了一种基站，用于基于多点协同发送和接收的移动通信系统，包括：In order to achieve the above object, an embodiment of the present invention also provides a base station for a mobile communication system based on coordinated multi-point transmission and reception, including:
联合资源调度模块，用于根据所述用户设备的反馈进行联合资源调度；A joint resource scheduling module, configured to perform joint resource scheduling according to feedback from the user equipment;
功率平均值计算模块，用于计算一功率平均值，为A/[B+(N-1)C-D]，A为基站总的发射功率，B为基站的资源块总数目，C为分配给采用沉默模式的用户设备的资源块的数目，D为被沉默的资源块的数目；The power average calculation module is used to calculate a power average, which is A/[B+(N-1)C-D], where A is the total transmission power of the base station, B is the total number of resource blocks of the base station, and C is allocated to the silent The number of resource blocks of the user equipment in the mode, D is the number of silent resource blocks;
发射模块，对于不采用沉默模式的用户设备，以第一功率进行下行信号的发射，对于采用沉默模式的用户设备，以第二功率进行下行信号的发射，所述第一功率为所述功率平均值，所述第二功率为所述功率平均值的N倍。The transmitting module is configured to transmit downlink signals at a first power for user equipment not in silent mode, and to transmit downlink signals at a second power for user equipment in silent mode, where the first power is the power average value, the second power is N times the average value of the power.
为了实现上述目的，本发明实施例还提供了一种基于多点协同发送和接收的移动通信系统，包括用户设备和基站：In order to achieve the above purpose, an embodiment of the present invention also provides a mobile communication system based on coordinated multi-point transmission and reception, including user equipment and a base station:
所述用户设备包括：The user equipment includes:
小区选择模块，用于基于动态小区选择技术在资源块上选定第一小区；A cell selection module, configured to select a first cell on a resource block based on a dynamic cell selection technology;
吞吐量计算模块，用于在所述用户设备为所述第一小区的小区边缘用户设备时，计算在所述资源块上的第一吞吐量和第二吞吐量；a throughput calculation module, configured to calculate the first throughput and the second throughput on the resource block when the user equipment is a cell edge user equipment of the first cell;
所述第一吞吐量和第二吞吐量分别为所述用户设备在沉默模式和通常模式下利用所述资源块所能达到的吞吐量；The first throughput and the second throughput are throughputs that can be achieved by the user equipment using the resource block in silent mode and normal mode, respectively;
判断模块，用于判断所述第一吞吐量是否大于第二吞吐量的N倍，获取一判断结果；所述N为沉默模式下，为所述用户设备提供无线通信服务的基站的数量；A judging module, configured to judge whether the first throughput is greater than N times the second throughput, and obtain a judgment result; the N is the number of base stations that provide wireless communication services for the user equipment in silent mode;
反馈模块，用于在所述判断结果指示所述第一吞吐量大于或等于第二吞吐量的N倍时，指示所述第一小区所属基站，在所述资源块上使用沉默模式，否则指示所述第一小区所属基站在所述资源块上不使用沉默模式。A feedback module, configured to instruct the base station to which the first cell belongs to use the silent mode on the resource block when the judgment result indicates that the first throughput is greater than or equal to N times the second throughput, otherwise instruct The base station to which the first cell belongs does not use a silent mode on the resource block.
所述基站包括：The base station includes:
联合资源调度模块，用于根据所述用户设备的反馈进行联合资源调度；A joint resource scheduling module, configured to perform joint resource scheduling according to feedback from the user equipment;
功率平均值计算模块，用于计算一功率平均值，为A/[B+(N-1)C-D]，A为基站总的发射功率，B为基站的资源块总数目，C为分配给采用沉默模式的用户设备的资源块的数目，D为被沉默的资源块的数目；The power average calculation module is used to calculate a power average, which is A/[B+(N-1)C-D], where A is the total transmission power of the base station, B is the total number of resource blocks of the base station, and C is allocated to the silent The number of resource blocks of the user equipment in the mode, D is the number of silent resource blocks;
发射模块，对于不采用沉默模式的用户设备，以第一功率进行下行信号的发射，对于采用沉默模式的用户设备，以第二功率进行下行信号的发射，所述第一功率为所述功率平均值，所述第二功率为所述功率平均值的N倍。The transmitting module is configured to transmit downlink signals at a first power for user equipment not in silent mode, and to transmit downlink signals at a second power for user equipment in silent mode, where the first power is the power average value, the second power is N times the average value of the power.
本发明实施例具有以下的有益效果：Embodiments of the present invention have the following beneficial effects:
本发明实施例中，小区间资源协调方法，用于基于多点协同发送和接收的移动通信系统，基于动态小区选择技术在资源块上选定小区后，只有在所述用户设备在沉默模式下利用该资源块所能达到的吞吐量大于用户设备在通常模式下利用该资源块所能达到的吞吐量的N倍时，才在所述资源块上使用沉默模式，所以利用本发明实施例在尽可能保证用户服务质量的同时，提高了系统的吞吐量。In the embodiment of the present invention, the inter-cell resource coordination method is used in a mobile communication system based on coordinated multi-point transmission and reception. After a cell is selected on a resource block based on a dynamic cell selection technology, only when the user equipment is in silent mode Only when the throughput that can be achieved by using the resource block is greater than N times the throughput that the user equipment can achieve by using the resource block in the normal mode, the silent mode is used on the resource block. Therefore, using the embodiment of the present invention in While ensuring the quality of service for users as much as possible, the throughput of the system is improved.
同时，本发明实施例中，根据如下数值平分系统发射功率：系统总的资源块数量加上需要以N倍功率发射的资源块的数量并减去被沉默的资源块的数量，然后依据该平分后的系统功率进行发射功率的分配，能够保证系统资源块和发射功率都被充分使用，提高了系统的吞吐量。At the same time, in the embodiment of the present invention, the transmission power of the system is equally divided according to the following value: the total number of resource blocks in the system plus the number of resource blocks that need to be transmitted with N times the power and minus the number of silenced resource blocks, and then according to the equal division The transmission power is allocated according to the final system power, which can ensure that both the system resource blocks and the transmission power are fully used, and the throughput of the system is improved.
附图说明Description of drawings
图1为本发明实施例的方法的流程示意图；Fig. 1 is a schematic flow chart of the method of the embodiment of the present invention;
图2为本发明实施例的用户设备的结构示意图；FIG. 2 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;
图3为本发明实施例的基站的结构示意图。FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
具体实施方式Detailed ways
本发明实施例的方法如图1所示，包括：The method of the embodiment of the present invention is shown in Figure 1, comprising:
步骤11，基于动态小区选择技术，用户设备在资源块上选定第一小区；Step 11, based on the dynamic cell selection technology, the user equipment selects the first cell on the resource block;
步骤12，所述用户设备为所述第一小区的小区边缘用户设备时，所述用户设备根据测量结果计算在所述资源块上的第一吞吐量和第二吞吐量；Step 12, when the user equipment is a cell edge user equipment of the first cell, the user equipment calculates a first throughput and a second throughput on the resource block according to a measurement result;
所述第一吞吐量和第二吞吐量分别为所述用户设备在沉默模式和通常模式下利用所述资源块所能达到的吞吐量；The first throughput and the second throughput are throughputs that can be achieved by the user equipment using the resource block in silent mode and normal mode, respectively;
在沉默模式下，如果瞬时接收功率最强的小区将资源块分配给该用户设备，而且该用户设备为服务小区的小区边缘用户设备时，瞬时接收功率次强的小区就不会分配该资源块给用户，且所述第一小区所属基站在所述资源块上的发射功率为通常发射功率的两倍。In silent mode, if the cell with the strongest instantaneous received power allocates resource blocks to the user equipment, and the user equipment is a cell-edge user equipment of the serving cell, the cell with the second highest instantaneous received power will not allocate the resource block to the user, and the transmit power of the base station to which the first cell belongs on the resource block is twice the normal transmit power.
步骤13，所述用户设备判断所述第一吞吐量是否大于第二吞吐量的两倍，获取一判断结果；Step 13, the user equipment judges whether the first throughput is greater than twice the second throughput, and obtains a judgment result;
步骤14，在所述判断结果指示所述第一吞吐量大于或等于第二吞吐量的两倍时，所述用户设备指示所述第一小区所属基站在所述资源块上使用沉默模式，否则指示所述第一小区所属基站在所述资源块上不使用沉默模式。Step 14, when the judgment result indicates that the first throughput is greater than or equal to twice the second throughput, the user equipment instructs the base station to which the first cell belongs to use the silent mode on the resource block, otherwise Instructing the base station to which the first cell belongs does not use the silent mode on the resource block.
在本发明具体实施例中，第一吞吐量为C(s)，第二吞吐量为C(s，n)，如下所示：In a specific embodiment of the present invention, the first throughput is C(s), and the second throughput is C(s, n), as follows:
其中，P表示单位发送功率，g(s)表示所述第一小区所属基站s到用户设备的信道衰落，N为系统小区数目，N0为噪声，g(n)表示所述第一小区的信号最强的邻小区所属的基站n到用户设备的信道衰落。Wherein, P represents the unit transmission power, g(s) represents the channel fading from the base station s to which the first cell belongs to the user equipment, N is the number of system cells,N0 is noise, and g(n) represents the noise of the first cell The channel from the base station n to which the neighboring cell with the strongest signal belongs to the user equipment is fading.
通过上述的描述可以发现，如果不使用沉默模式，如果第一小区的边缘用户A在资源块上能够取得的吞吐量为A1，由于在第二小区，该资源块还能够分配给其他用户，因此在第一小区和第二小区，如果不使用沉默模式，该资源块上能够带来的吞吐量为2A1；From the above description, it can be found that if the silent mode is not used, if the throughput that the edge user A of the first cell can obtain on the resource block is A1, since the resource block can also be allocated to other users in the second cell, therefore In the first cell and the second cell, if the silent mode is not used, the throughput that can be brought by the resource block is 2A1;
在沉默模式下，如果第一小区的边缘用户A在资源块上能够取得的吞吐量为B1，但由于在第二小区，该资源被沉默，无法带来任何吞吐量，因此在第一小区和第二小区，沉默模式下该资源块能够带来的吞吐量总和为B1。In the silent mode, if the edge user A in the first cell can obtain a throughput of B1 on the resource block, but in the second cell, the resource is silenced and cannot bring any throughput, so in the first cell and In the second cell, the total throughput that the resource block can bring in the silent mode is B1.
综合考虑，如果使用沉默模式，虽然能给小区边缘用户设备带来性能的提升，但考虑到系统的整体性能，本发明实施例中，仅在B1大于2A1时，才采用沉默模式进行传输，因此，相对于直接采用沉默模式，能够提高系统的吞吐量。Considering comprehensively, if the silent mode is used, although it can improve the performance of the cell edge user equipment, considering the overall performance of the system, in the embodiment of the present invention, only when B1 is greater than 2A1, the silent mode is used for transmission, so , compared with directly adopting the silent mode, the throughput of the system can be improved.
当然，为了基站端进行调度，本发明实施例中，还包括：Of course, for the base station to perform scheduling, the embodiment of the present invention also includes:
步骤15，所述用户设备向服务基站反馈与所述第一小区所属基站之间的下行信道的信道信息。Step 15, the user equipment feeds back the channel information of the downlink channel with the base station to which the first cell belongs to the serving base station.
在本发明的具体实施例中，步骤11具体包括：In a specific embodiment of the present invention, step 11 specifically includes:
步骤111，针对所述资源块，用户设备根据下行测量值计算激活集中每个基站在所述资源块上的下行信噪比；Step 111, for the resource block, the user equipment calculates the downlink signal-to-noise ratio of each base station in the active set on the resource block according to the downlink measurement value;
步骤112，所述用户设备选择信噪比最大的基站作为利用所述资源块进行的下行信号发送的基站；所述第一小区属于所述信噪比最大的基站。Step 112, the user equipment selects the base station with the largest signal-to-noise ratio as the base station for sending downlink signals using the resource block; the first cell belongs to the base station with the largest signal-to-noise ratio.
步骤113，所述用户设备将选择的基站通知服务基站。Step 113, the user equipment notifies the serving base station of the selected base station.
在本发明的具体实施例中，所述用户设备接收到的第一下行参考信号和第二下行参考信号的之间的功率差值小于预先设置的阈值时，所述用户设备为小区边缘用户设备，所述第一下行参考信号为服务基站发送的下行参考信号，所述第二下行参考信号为服务基站的邻基站中，所述用户接收到的信号最强的基站。In a specific embodiment of the present invention, when the power difference between the first downlink reference signal and the second downlink reference signal received by the user equipment is smaller than a preset threshold, the user equipment is a cell edge user In the device, the first downlink reference signal is the downlink reference signal sent by the serving base station, and the second downlink reference signal is the base station with the strongest signal received by the user among neighboring base stations of the serving base station.
本发明实施例的小区间资源调度方法还包括：The inter-cell resource scheduling method in the embodiment of the present invention also includes:
步骤15，基站根据用户设备的反馈进行联合资源调度；Step 15, the base station performs joint resource scheduling according to the feedback from the user equipment;
在资源块和功率分配方法可以是比例公平算法和其他的资源调度算法，如比例公平算法下，将所有小区内的所有用户在所有资源块上的优先值按从大到小顺序，以此分配。The resource block and power allocation method can be proportional fairness algorithm and other resource scheduling algorithms, such as proportional fairness algorithm, all users in all cells have priority values on all resource blocks in order from large to small, so as to allocate .
由于联合资源调度属于现有技术的范畴，在此不作进一步详细描述。Since the joint resource scheduling belongs to the scope of the prior art, no further detailed description is given here.
步骤16，基站计算一功率平均值，如下：Step 16, the base station calculates a power average, as follows:
A/(B+C-D)A/(B+C-D)
其中A为基站总的发射功率，B为基站的资源块总数目，C为分配给采用沉默模式的用户设备的资源块的数目，D为被沉默的资源块的数目。Wherein A is the total transmission power of the base station, B is the total number of resource blocks of the base station, C is the number of resource blocks allocated to user equipment adopting the silent mode, and D is the number of resource blocks to be silenced.
步骤17，对于通常用户设备，基站以第一功率进行下行信号的发射，对于采用沉默模式的用户设备，基站以第二功率进行下行信号的发射，所述第一功率为所述功率平均值，所述第二功率为所述功率平均值的2倍。Step 17, for the normal user equipment, the base station transmits the downlink signal with the first power, and for the user equipment adopting the silent mode, the base station transmits the downlink signal with the second power, the first power is the average value of the power, The second power is twice the average value of the power.
利用上述的方法，使得所有的资源块和所有的发射功率都能被充分使用，提高了系统的吞吐量，举例说明如下。Using the above method, all the resource blocks and all the transmission power can be fully used, and the throughput of the system is improved, an example is as follows.
假定基站的总的发射功率，基站一共有10个资源块，假定有4个资源块需要以两倍的功率发射，2个资源块被沉默，则基站当前实际能够使用的资源块为8个，如果利用现有技术的方法，则基站只能利用6个资源块，因为需要以两倍的功率发射的4个资源块使用了80％的发射功率，而剩下的20％的发射功率只能分配给2个资源块，因此，还有2个资源块无法利用，必然会降低系统的吞吐量。Assuming the total transmission power of the base station, the base station has a total of 10 resource blocks, assuming that there are 4 resource blocks that need to be transmitted with twice the power, and 2 resource blocks are silenced, then the base station can actually use 8 resource blocks at present. If the prior art method is used, the base station can only use 6 resource blocks, because the 4 resource blocks that need to be transmitted with twice the power use 80% of the transmission power, and the remaining 20% of the transmission power can only Allocated to 2 resource blocks, therefore, there are still 2 resource blocks that cannot be used, which will inevitably reduce the throughput of the system.
而利用本发明实施例的方法，首先将功率分为(B+C-D)＝12份，对4个需要以两倍的功率发射的资源块分别分配12份中的2份功率，因此，还剩下4份功率，可以平分给剩下的4个资源块，因此，所有的资源块都能够使用，能够提高系统的吞吐量。However, using the method of the embodiment of the present invention, the power is first divided into (B+C-D)=12 shares, and 2 of the 12 shares of power are allocated to the 4 resource blocks that need to be transmitted with twice the power. Therefore, the remaining The next 4 shares of power can be equally distributed to the remaining 4 resource blocks, so all resource blocks can be used, which can improve the throughput of the system.
假定基站的总的发射功率，基站一共有10个资源块，则功率分成10份，假定有2个资源块需要以两倍的功率发射，4个资源块被沉默，则基站当前实际能够使用的资源块为6个，如果利用现有技术的方法，因为需要以两倍的功率发射的2个资源块使用了40％的发射功率，而以1倍的功率发射的4个资源块使用40％的发射功率，则还剩下20％的发射功率没有利用，必然会降低系统的吞吐量。Assuming the total transmission power of the base station, the base station has a total of 10 resource blocks, the power is divided into 10 parts, assuming that there are 2 resource blocks that need to be transmitted with twice the power, and 4 resource blocks are silenced, then the current actual use of the base station There are 6 resource blocks. If the method of the prior art is used, 2 resource blocks that need to be transmitted with twice the power use 40% of the transmission power, and 4 resource blocks that are transmitted with 1 times the power use 40% 20% of the transmission power is not used, which will inevitably reduce the throughput of the system.
而利用本发明实施例的方法，首先将功率分为(B+C-D)＝8份，对2个需要以两倍的功率发射的资源块分别分配2份功率，因此，还剩下4份功率，可以分配给剩下的4个资源块，因此，所有的发射功率都被利用，能够提高系统的吞吐量。However, using the method of the embodiment of the present invention, the power is first divided into (B+C-D)=8 shares, and 2 shares of power are allocated to the 2 resource blocks that need to be transmitted with twice the power. Therefore, there are still 4 shares of power , can be allocated to the remaining 4 resource blocks, therefore, all the transmission power is utilized, which can improve the throughput of the system.
本发明实施例的用户设备，如图2所示，包括：The user equipment in the embodiment of the present invention, as shown in FIG. 2 , includes:
小区选择模块，用于基于动态小区选择技术在资源块上选定第一小区；A cell selection module, configured to select a first cell on a resource block based on a dynamic cell selection technology;
吞吐量计算模块，用于在所述用户设备为所述第一小区的小区边缘用户设备时，计算在所述资源块上的第一吞吐量和第二吞吐量；a throughput calculation module, configured to calculate the first throughput and the second throughput on the resource block when the user equipment is a cell edge user equipment of the first cell;
所述第一吞吐量和第二吞吐量分别为所述用户设备在沉默模式和通常模式下利用所述资源块所能达到的吞吐量；The first throughput and the second throughput are throughputs that can be achieved by the user equipment using the resource block in silent mode and normal mode, respectively;
判断模块，用于判断所述第一吞吐量是否大于第二吞吐量的两倍，获取一判断结果；A judging module, configured to judge whether the first throughput is greater than twice the second throughput, and obtain a judging result;
反馈模块，用于在所述判断结果指示所述第一吞吐量大于或等于第二吞吐量的两倍时，指示所述第一小区所属基站，在所述资源块上使用沉默模式，否则指示所述第一小区所属基站在所述资源块上不使用沉默模式。A feedback module, configured to instruct the base station to which the first cell belongs to use the silent mode on the resource block when the judgment result indicates that the first throughput is greater than or equal to twice the second throughput, otherwise instruct The base station to which the first cell belongs does not use a silent mode on the resource block.
本发明实施例的基站如图3所示，包括：The base station of the embodiment of the present invention is shown in Figure 3, including:
联合资源调度模块，用于根据所述用户设备的反馈进行联合资源调度；A joint resource scheduling module, configured to perform joint resource scheduling according to feedback from the user equipment;
功率平均值计算模块，用于计算一功率平均值，为A/(B+C-D)，A为基站总的发射功率，B为基站的资源块总数目，C为分配给采用沉默模式的用户设备的资源块的数目，D为被沉默的资源块的数目；The power average calculation module is used to calculate a power average, which is A/(B+C-D), where A is the total transmission power of the base station, B is the total number of resource blocks of the base station, and C is allocated to user equipment that adopts the silent mode The number of resource blocks, D is the number of silenced resource blocks;
发射模块，对于不采用沉默模式的用户设备，以第一功率进行下行信号的发射，对于采用沉默模式的用户设备，以第二功率进行下行信号的发射，所述第一功率为所述功率平均值，所述第二功率为所述功率平均值的2倍。The transmitting module is configured to transmit downlink signals at a first power for user equipment not in silent mode, and to transmit downlink signals at a second power for user equipment in silent mode, where the first power is the power average value, the second power is twice the average value of the power.
本发明实施例的移动通信系统，包括用户设备和基站，其中：The mobile communication system of the embodiment of the present invention includes a user equipment and a base station, wherein:
所述用户设备包括：The user equipment includes:
小区选择模块，用于基于动态小区选择技术在资源块上选定第一小区；A cell selection module, configured to select a first cell on a resource block based on a dynamic cell selection technology;
吞吐量计算模块，用于在所述用户设备为所述第一小区的小区边缘用户设备时，计算在所述资源块上的第一吞吐量和第二吞吐量；a throughput calculation module, configured to calculate the first throughput and the second throughput on the resource block when the user equipment is a cell edge user equipment of the first cell;
所述第一吞吐量和第二吞吐量分别为所述用户设备在沉默模式和通常模式下利用所述资源块所能达到的吞吐量；The first throughput and the second throughput are throughputs that can be achieved by the user equipment using the resource block in silent mode and normal mode, respectively;
判断模块，用于判断所述第一吞吐量是否大于第二吞吐量的两倍，获取一判断结果；A judging module, configured to judge whether the first throughput is greater than twice the second throughput, and obtain a judging result;
反馈模块，用于在所述判断结果指示所述第一吞吐量大于或等于第二吞吐量的两倍时，指示所述第一小区所属基站，在所述资源块上使用沉默模式，否则指示所述第一小区所属基站在所述资源块上不使用沉默模式。A feedback module, configured to instruct the base station to which the first cell belongs to use the silent mode on the resource block when the judgment result indicates that the first throughput is greater than or equal to twice the second throughput, otherwise instruct The base station to which the first cell belongs does not use a silent mode on the resource block.
所述基站包括：The base station includes:
联合资源调度模块，用于根据所述用户设备的反馈进行联合资源调度；A joint resource scheduling module, configured to perform joint resource scheduling according to feedback from the user equipment;
功率平均值计算模块，用于计算一功率平均值，为A/(B+C-D)，A为基站总的发射功率，B为基站的资源块总数目，C为分配给采用沉默模式的用户设备的资源块的数目，D为被沉默的资源块的数目；The power average calculation module is used to calculate a power average, which is A/(B+C-D), where A is the total transmission power of the base station, B is the total number of resource blocks of the base station, and C is allocated to user equipment that adopts the silent mode The number of resource blocks, D is the number of silenced resource blocks;
发射模块，对于不采用沉默模式的用户设备，以第一功率进行下行信号的发射，对于采用沉默模式的用户设备，以第二功率进行下行信号的发射，所述第一功率为所述功率平均值，所述第二功率为所述功率平均值的2倍。The transmitting module is configured to transmit downlink signals at a first power for user equipment not in silent mode, and to transmit downlink signals at a second power for user equipment in silent mode, where the first power is the power average value, the second power is twice the average value of the power.
在上述的实施例中，以沉默模式下，为所述用户设备提供无线通信服务的基站的数量为2进行的说明，但在沉默模式下，为所述用户设备提供无线通信服务的基站的数量为N时，则需要判断所述第一吞吐量是否大于第二吞吐量的N倍，获取一判断结果并在判断结果指示所述第一吞吐量大于或等于第二吞吐量的N倍时，指示所述第一小区所属基站，在所述资源块上使用沉默模式，否则指示所述第一小区所属基站在所述资源块上不使用沉默模式。In the above embodiment, it is described that in the silent mode, the number of base stations providing wireless communication services for the user equipment is 2, but in the silent mode, the number of base stations providing wireless communication services for the user equipment is When it is N, it is necessary to judge whether the first throughput is greater than N times the second throughput, obtain a judgment result and when the judgment result indicates that the first throughput is greater than or equal to N times the second throughput, Instructing the base station to which the first cell belongs to use the silent mode on the resource block, otherwise instructing the base station to which the first cell belongs not to use the silent mode on the resource block.
而基站进行能量分配时，功率平均值为A/[B+(N-1)C-D]，A为基站总的发射功率，B为基站的资源块总数目，C为分配给采用沉默模式的用户设备的资源块的数目，D为被沉默的资源块的数目，而采用沉默模式的用户设备，的发射功率为所述功率平均值的N倍。When the base station performs energy allocation, the average power is A/[B+(N-1)C-D], A is the total transmission power of the base station, B is the total number of resource blocks of the base station, and C is allocated to user equipment in silent mode The number of resource blocks, D is the number of silenced resource blocks, and the transmission power of the user equipment adopting the silence mode is N times of the average power value.
举例说明如下，假定A小区有B、C、D三个邻小区，而用户设备处于A小区中，此时，对于B和C两个小区而言，用户设备都是小区A的边缘用户设备，但对于D设备而言，用户设备不是小区A的边缘用户设备，这种情况下，N等于3，也就是在沉默模式下，为所述用户设备提供无线通信服务的小区/基站为A、B和C，数量为3。An example is as follows, assuming that cell A has three neighboring cells, B, C, and D, and user equipment is located in cell A, at this time, for both cells B and C, the user equipment is the edge user equipment of cell A, But for device D, the user equipment is not the edge user equipment of cell A. In this case, N is equal to 3, that is, in the silent mode, the cells/base stations that provide wireless communication services for the user equipment are A and B and C with a quantity of 3.
而对于用户设备假定在小区A分配到资源块A1，则小区B和C的资源块A1都被沉默，而且在小区A的资源块A1上以3倍发射功率进行发射。Assuming that the user equipment is allocated resource block A1 in cell A, the resource blocks A1 of cells B and C are all silenced, and the resource block A1 of cell A transmits with 3 times the transmission power.
为了验证本发明实施例的效果，在此给出仿真评估结果，仿真参数如下：In order to verify the effect of the embodiment of the present invention, the simulation evaluation results are given here, and the simulation parameters are as follows:
如下表所示，为本发明实施例的仿真结果：As shown in the following table, it is the simulation result of the embodiment of the present invention:
从上表可以看出，本发明实施例的方法，不管进不进行功率重新分配，相对于现有的方法都有一定程度的吞吐量的提升，而在进行功率重新分配之后，能够进一步提升系统的吞吐量。It can be seen from the above table that the method of the embodiment of the present invention, regardless of whether power reallocation is performed or not, has a certain degree of throughput improvement compared with the existing method, and after power reallocation, the system can be further improved. throughput.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.
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| JP2011071993A (en) | 2011-04-07 |
| CN102036385B (en) | 2015-07-01 |
| JP5528965B2 (en) | 2014-06-25 |
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