CN101400139A - Data transmission method and base station in multiple base station collaboration system - Google Patents

Data transmission method and base station in multiple base station collaboration system Download PDF

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CN101400139A
CN101400139A CN 200810225079 CN200810225079A CN101400139A CN 101400139 A CN101400139 A CN 101400139A CN 200810225079 CN200810225079 CN 200810225079 CN 200810225079 A CN200810225079 A CN 200810225079A CN 101400139 A CN101400139 A CN 101400139A
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terminal
base station
cell
channel information
pmi
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CN 200810225079
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CN101400139B (en
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辉 张
王西强
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北京创毅视讯科技有限公司
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Abstract

The invention discloses a data transmission method and a base station in a multi-base station coordinated system, comprising that: when performing user scheduling for a plurality of times, with respect to the terminal of a current transmission retransmission data package in the district, the base station selects the channel information which has large response relativity with the local district terminal channel, small response relativity with the adjacent district terminal channel, and causes the terminal to obtain highest scheduling priority as the channel information corresponding to the terminal; then the base station selects the terminal with the highest scheduling priority to perform data transmission according to the channel information of each terminal in the local district. In the invention, each base station independently performs user scheduling, and realizes partial avoiding of multi-base station interference through updating the channel information.

Description

一种多基站协作系统中的数据传输方法和基站 Data transmission method and a multi-base station cooperative system

技术领域 FIELD

本发明涉及通信领域,尤其涉及一种多基站协作系统中的数据传输方法和基站。 The present invention relates to communication field, and particularly relates to a data transmission method and a multi-base station cooperative system.

背景技术 Background technique

在现有通信系统中,例如HSPA (High Speed Packet Access,高速分组接入),3GPP (3rd Generation Partnership Project,第三代合作伙伴计划)LTE (Long Term Evolution,长期演进),每个基站独立进行多用户调度。 In existing communication systems, such as HSPA (High Speed ​​Packet Access, High Speed ​​Packet Access), 3GPP (3rd Generation Partnership Project, the Third Generation Partnership Project) LTE (Long Term Evolution, LTE), each base station independently multi-user scheduling. 随着通信技术的发展,在下一代移动通信系统中,例如3GPP LTE-Advanced(3GPP LTE进一步演进)系统中,系统的平均吞吐量和峰值速率都将在现有速率的基础上大幅提高2-3倍。 With the development of communication technologies, next generation mobile communication systems, such as 3GPP LTE-Advanced (3GPP LTE further evolution) system, the average and peak throughput rate of the system will be greatly improved rate of 2- existing on 3 times. 为了实现这样的目标,多小区(多基站)之间的协作的方法是一种非常有效的方法。 To achieve this goal, a method of collaboration between the multi-cell (multi-cell) is a very effective method. 因为3GPP LTE/LTE-Advanced系统是干扰受限系统,即系统容量受限于来自邻近小区的干扰信号。 Because the 3GPP LTE / LTE-Advanced system is an interference limited system, i.e. the system capacity is limited by the interference signal from a neighboring cell. 而多小区协作能够缓解或者部分消除邻近小区的干扰信号,从而能够提高系统的性能。 The cooperative multi-cell portion can alleviate or eliminate the interference signal of the adjacent cell, thereby improving system performance.

文献《3GPP TSG RAN WG1 Meeting #54 Rl-082886, "Inter-Cell Interference Mitigation Through Limited Coordination" , Samsung》中提至U基于LTE/LTE-Advanced系统的三种小区间干扰管理的办法: Document "3GPP TSG RAN WG1 Meeting # 54 Rl-082886," Inter-Cell Interference Mitigation Through Limited Coordination ", Samsung" raised to the U interference management approach based on three kinds of inter-cell LTE / LTE-Advanced system:

(A)小区间干扰随机化 (A) inter-cell interference randomization

在基站进行独立调度的时候,每个基站无法预测邻近小区的干扰信号, 由于信道的衰落特性,来自邻近小区的干扰信号会在时域、频域上发生变化, 从而导致本小区用户的信干噪比恶化。 When the base station independent scheduling, each base station can not predict the interference signals of the neighboring cells, due to fading characteristics of the channel, the interference signals from neighboring cells will change in the time domain, frequency domain, resulting in the present cell user signal to interference noise ratio deterioration. 小区间的干扰随机化,就是通过某些方法对信号进行处理,例如加扰,从而使来自多个基站的干扰信号的叠加, 在时域、频域上变化缓慢(基于大数定理),能够利用关于干扰的先验信息, 提高多用户调度的准确度,改善系统性能。 Inter-cell interference randomization, a signal is processed by some method, for example, scrambling, such that the superimposition of the interference signals from a plurality of base stations, in the time domain, frequency domain changes slowly (based on law of large numbers), can be using a priori information on interference, improve the accuracy of the multi-user scheduling, to improve system performance. (B) 小区间干扰消除通过在邻近的基站之间共享信道信息、待发送的数据信息,对待发送的数据信息进行预处理,例如预编码(precoding),从而达到在用户端部分消除邻近小区干扰的目的,以提高系统性能。 (B) to eliminate inter-cell interference cancellation neighboring cell interference users by sharing the end portion between the adjacent base station channel information, the data information to be transmitted, the information data to be transmitted is preprocessed, such as pre-coding (Precoding), so as to achieve the purpose, in order to improve system performance. 但是,该方法对系统的信令开销要求较大,并且如何实现基站之间的实时信道信息和数据的共享还没有较好的解决方法。 However, this method signaling overhead of the system requires a larger, and how to achieve real-time sharing of information and data channel between a base station is no better solution. 因此,该方法在实际应用中限制较大。 Thus, this method limits the practical application in large. (C) 小区间干扰协作/避免该方法通过在邻近小区之间部分共享信道信息,利用一个中央调度器, 或者进行独立调度,从而使邻近小区之间的信号和干扰在一定程度上相互避免,降低邻近小区的干扰信号对本小区的干扰,以提高性能。 (C) inter-cell interference coordination / avoided by this method the portion of shared channel information between the neighboring cells by a central scheduler, or scheduling independently, so that the signals between adjacent cells and avoid mutual interference to some extent, adjacent cell interference reducing signal interference of the cell, to improve performance. 但是邻近小区之间相互之间不共享数据,因此不能进行联合的数据预处理(利如多用户预编码技术),仅能根据部分共享的信道信息调整本小区的用户调度。 But do not share data with each other between adjacent cells, and therefore can not be pre-combined data (such as Li multiuser precoding technology), the present user scheduling adjustment only partial cell shared channel information. 文献中非基站协作模式下的多用户调度过程如图l所示,包括:101、 下行导频信息发送,基站向其覆盖下的终端发送共知的伪随机序列。 Multi-user scheduling process at the base station cooperative mode document shown in FIG. Africa L, comprising: 101, transmits the downlink pilot information, the base station transmits a pseudorandom sequence known to the terminals under its coverage. 102、 信道估计及反馈,各终端分别利用导频信息进行信道估计,并将CQI (channel quality indicator, ^f言道质量指示)禾卩PMI (perferred matrix index,优先矩阵索引)信息反馈到服务基站。 102, a channel estimation and feedback, each terminal separately using pilot information for channel estimation and CQI (channel quality indicator, ^ f words channel quality indication) Wo Jie PMI (perferred matrix index, the preference matrix index) information back to the serving base station . 103、 多用户调度,每个基站独立进行用户调度,根据相应的调度算法, 选择调度优先级最高的终端。 103, multi-user scheduling, each user scheduling base station independently, according to the corresponding scheduling algorithm, select the highest scheduling priority terminal. 104、 下行数据和信令传输和接收,根据多用户调度的结果,基站使用被调度到的终端反馈的CQI和PMI对数据进行调制编码和预处理,然后在相应的下行信道传输信令和数据。 104, and signaling downlink data transmission and reception, based on a result of multi-user scheduling, the base station uses the CQI and PMI are fed back to the scheduled terminals and the data modulation and coding preprocessing and a corresponding downlink channel for transmitting signaling and data . 终端根据接收到的下行信令进行数据接收、 检测、解调、解码等操作。 Data reception terminal according to the received downlink signaling detection, demodulation, decoding, and other operations. 文献中多基站协作模式下的基于干扰冲突避免的多用户调度过程如图2所示:201 、终端UEl基于导频信息测量服务基站eNBl和邻近基站eNB2的信道响应;UE2基于导频信息测量服务基站eNB2和邻近基站eNBl的信道响应; Multi-user scheduling process disturbance based collision avoidance shown in Figure 2 in a multi-base station cooperative mode Document: 201, UEl terminal based on pilot measurement information serving base station and neighbor base eNBl eNB2 channel response; the UE2 pilot measurements based on the service information channel base station and a neighboring base station eNB2 eNBl response;

各UE分别获得主干扰小区的PMI反馈信息,包括: Respectively each UE interfering PMI feedback information of the main cell, comprising:

(1) 干扰小区(邻近基站所在小区,也可称为邻近小区)的参考PMI; (1) interfering cell (neighboring cell base station is located, may also be referred to as neighboring cells) of the PMI reference;

(2) 服务小区(服务基站所在小区)的PMI; (2) PMI serving cell (serving cell base station is located) is;

(3) 信息5,指示推荐的一组PMI (基于能够容忍的干扰水平); 各UE分别获得性能改善值:ACQI表示当干扰小区使用推荐的干扰小区 (3) 5 information indicating a recommended set of PMI (based on the interference level can be tolerated); each UE improved performance values ​​were: ACQI interfering cell indicates when the recommended interfering cell

参考PMI的时候带来的性能改善; PMI brings reference time performance improvement;

202、 UEl将以上反馈信息反馈给服务基站eNBl; UE2将以上反馈信息反馈给服务基站eNB2; 202, UEl above feedback information to the serving base station eNBl; UE2 above feedback information to the serving base station the eNB2;

203、 eNBl和eNB2间进行信息交换; 203, and between eNBl eNB2 to exchange information;

204、 eNBl和eNB2进行多用户调度,选择PMI及相应的终端,使该终端的吞吐量最大化; 204, eNBl eNB2 and multi-user scheduling, and selects a PMI corresponding terminal, the terminal to maximize the throughput;

eNB 1确定对UE 1进行预编码所采用的矢量和矩阵;eNB2确定对UE2进行预编码所采用的矢量和矩阵; eNB 1 UE 1 determines to perform the precoding vectors and matrices used; UE2 is the eNB2 determines the precoding vectors and matrices used;

205、 eNBl发送数据给l正l, eNB2发送数据给UE2。 205, eNBl transmitting data to l n l, eNB2 transmits data to the UE2.

可见,在上述文献中提到的邻近小区千扰冲突避免的方法中,需要反馈的信息较多,与现有的3GPPLTE的标准差别较大,因此如果应用该方法,还需要对现有标准进行较大的修改。 Seen in the above mentioned documents one thousand neighboring cell scrambling method to avoid conflict, the more information needs to be fed, the larger the difference existing standard 3GPPLTE, so if this method is applied to existing standards required major changes. 对于上面提到的(C)的方法,由于上述文献中要求的反馈信息较多,因此上行开销较大。 For (C) of the above-mentioned method, since the above-mentioned document requires more feedback information, and therefore a greater upstream overhead. 另外,如果不是进行独立调度的话,则还需要一个主调度器,负责联合调度参与协作的小区中的终端。 Further, if scheduling is not independent, then you need a master scheduler is responsible for cell terminal participating in collaboration in the joint scheduling.

发明内容 SUMMARY

本发明要解决的技术问题是提供一种多基站协作系统中的数据传输方法和基站,每个基站能独立进行多用户调度,并且通过更新信道信息实现多基站干扰的部分避免。 The present invention is to solve the technical problem of data transmission method and a base station to provide a multi-base station cooperation system, each base station can independently perform multi-user scheduling, a base station and a multi-section to avoid interference by the update channel information.

为了解决上述问题,本发明提供了一种多基站协作系统中的数据传输方 To solve the above problems, the present invention provides a multi-party data transmission system in the base station cooperative

法,包括: Law, including:

各次进行多用户调度时,对于本小区中当前传输重传数据包的终端,基 Each time when the multi-user scheduling for the terminal in the present cell current transmission retransmitted data packet, the base

站选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使该终端能得到最高调度优先级的信道信息更新该终端对应的信道信息;然后基站根据本小区各终端对应的信道信息选择调度优先级最高的终端进行数据传输。 Station selects this cell terminal channel response associated large or Small adjacent cell terminal channel response and makes the terminal can get the highest scheduling priority channel information update channel information corresponding to the terminal; and a base station of the present cell the terminals channel information corresponding to the selected highest priority scheduling terminals for data transmission. 进一步的,基站选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使该终端能得到最高调度优先级的信道信息更新该终端对应的信道信息具体包括:选择与本小区终端反馈的PMI1的相关性大于或等于预定门限值P l的各PMI组成集合S1;选择与邻近小区终端反馈的PMI2的相关性小于或等于门限值P 2的各PMI组成集合S2;得到S1和S2的交集S;对于每个当前传输重传数据包的终端,从集合s中选择该终端能够得到最高调度优先级的PMI作为该终端的PMI 。 Further, the base station selects this cell terminal channel response associated large or Small adjacent cell terminal channel response and makes the terminal can get the highest scheduling priority channel information update channel information corresponding to the terminal comprises: selecting this correlation between cell terminals PMI1 feedback equal to or greater than a predetermined threshold value P L each PMI composition set Sl; neighboring cell selecting terminals PMI2 fed back is equal to or less than the correlation threshold value P 2 each PMI composition set S2 ; intersection S1 and S2 to obtain s; each of the terminal for the current transmission is retransmission data packet, selected from a set terminal s can be obtained in the highest scheduling priority PMI PMI as the terminal. 进一歩的,Pl为0.5。 Into a ho is, Pl 0.5. 进一步的,P2为0.5。 Further, P2 is 0.5. 进一歩的,如果集合S是空集,则令S-S1或者S-S2。 Into a ho, if set S is an empty set, so that the S-S1 or S-S2. 本发明还提供了一种多基站协作系统中的基站,包括:用于接收及保存本小区终端和邻近小区终端所反馈的信道信息的接收单元、用于根据接收单元中保存的本小区各终端对应的信道信息,对调度优先级最高的终端进行调度的调度单元、用于使用调度单元所调度到的终端对应的信道信息对数据进行调制编码和预处理的数据处理单元、及用于发送处理后的数据的发送单元;还包括:判断单元和调度单元;所述判断单元用于在每次收到各终端所反馈的信道信息后,判断本小区中各终端当前传输的是否为重传数据包,针对当前传输重传数据包的终端发送更新指令给更新单元;所述更新单元用于在收到所述更新指令后,选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使所述当前传输重传数据包的终端能得到最高调度优先级的 The present invention also provides a multi-base station cooperation system, a base station, comprising: means for receiving and holding the received channel information terminal of the present cell and neighboring cell, the terminal is fed back, for holding the receiving unit according to the present cell the terminals corresponding to the channel information, the terminal of the highest scheduling priority scheduling unit performs scheduling for scheduling using the channel information scheduled to the terminal unit corresponding to the data processing unit performs data modulation and coding pretreatment and processing for transmitting after the data transmission unit; further comprising: a determination unit and a scheduling unit; means for determining, after the receipt of each channel information fed back by each terminal, each terminal determines the current transmission of this cell if the data retransmission packet sent to the update instruction for updating the terminal unit current transmission retransmitted data packet; said means for updating after receiving the update instruction, the terminal selects the cell of the present large channel response associated with the neighboring cell terminal channel response the correlation is small, and the terminal transmits the current retransmitted data packet can obtain the highest scheduling priority 道信息,来更新接收单元中该终端对 Channel information, updates the terminal receiving unit

应的信道信息。 Corresponding to the channel information. 进一步的,更新单元选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使所述当前传输重传数据包的终端能得到最高调度优先级的信道信息,来更新接收单元中该终端对应的信道信息具体是指:更新单元选择与本小区终端反馈的PMI1的相关性大于或等于预定门限值P 1的各PMI组成集合S1,选择与邻近小区终端反馈的PMI2的相关性小于或等于门限值P2的各PMI组成集合S2;得到S1和S2的交集S;对于每个当前传输重传数据包的终端,更新单元从集合s中选择该终端能够得到最髙调度优先级的PMI来更新接收单元中该终端的PMI。 Further, the updating unit to select the correlation large terminal is believed that the cell channel response associated small adjacent cell terminal channel response, and the terminal of the current transmission retransmitted data packets get the highest scheduling priority channel information is updated the receiving unit the channel information corresponding to the terminal in particular: updating unit selects relevance to the present cell terminal feeds back the PMI1 is greater than or equal to a predetermined threshold value P of each PMI 1 to form a set S1, selects the neighboring cell terminal feeds back the PMI2 correlation less than or equal PMI each gate form a set value P2, S2; S1 and S2 obtained intersection s; each of the terminal for the current transmission is retransmission data packet, the updating unit selected from a set terminal s can be obtained in the most Gao scheduling priority to a PMI PMI update receiving unit of the terminal. 进一歩的,Pl为0.5。 Into a ho is, Pl 0.5. 进一步的,P2为0.5。 Further, P2 is 0.5. 进一歩的,如果集合S是空集,则更新单元令S二S1或者S二S2。 Into a ho, if set S is an empty set, the updating unit causes two or S-S diglycidyl S1 S2. 本发明的技术方案通过判断HARQ是否是新数据包,来判断多基站协作干扰避免模式下的基站是否通过更改本小区终端的PMI或其它参数以降低对邻近小区终端的干扰。 Aspect of the present invention, by determining whether a new HARQ packet is determined to avoid interference if multiple cooperative base stations in the base station mode change PMI or other parameters of cell terminals to reduce interference to neighboring cells of the terminal. 本发明对现有反馈机制改变很小,与现有技术相比, 不需要反馈额外的CQI、门限值等信息。 The present invention is little change to the existing feedback mechanism, compared to the prior art, no additional feedback the CQI, the threshold information. 并且各个基站能够独立进行判断是否需要牺牲本小区的性能以降低对邻近小区的干扰。 And each base station can independently judge whether to sacrifice the performance of the cell to reduce interference to neighboring cells. 由于HARQ重传的数据包将与以前的数据包合并,因此对于重传的数据包,性能不需要严格的保证。 Since HARQ retransmission data packet will be merged with previous data packet, and therefore for the retransmitted data packet, the performance does not require strict guarantees. 这也是提出本发明的方案的基础,当本小区是重传的数据包的时候,启动PMI 更新机制,在保证本小区性能恶化被控制在一定范围内的同时,尽可能的降低对邻近小区的干扰。 It is also proposed based embodiment of the present invention, when this cell is retransmitted data packet start PMI update mechanism to ensure this performance degradation while the cell is controlled within a certain range, as low as possible in neighboring cells interference. 对于工作在多基站协作模式的终端,通常是小区边界的终端,因此误包率通常较高,基于前面的分析,误包率较高的时候,本发明能够带来的性能增益将更加明显。 For the multi-BS collaborative working in the terminal mode, usually the terminal cell boundary, and therefore generally high packet error rate, based on the foregoing analysis, a higher packet error rate when the present invention is capable of performance gains will become apparent. 附图说明图1是非基站协作模式下的多用户调度流程图;图2是多基站协作模式下的基于干扰冲突避免的多用户调度流程图; Brief Description of the multi-user non-scheduling base station cooperation mode flowchart of FIG. 1; FIG. 2 is a conflict based on the interference avoidance in multi-user scheduling flowchart of multi-BS collaborative model;

图3是本发明提供的一种多基站协作系统中的基站的具体实施框图; 图4是本发明实施例的多基站协作模式系统的示意框图;图5是本发明实施例的多用户调度流程图。 FIG 3 is a detailed block diagram of a multi-base station cooperation system according to the present invention provides a base station; Figure 4 is a schematic block diagram of a multi-cell cooperative mode system embodiment of the present invention; FIG. 5 is a multi-user scheduling process embodiment of the present invention Fig. 具体实施方式本发明主要针对的场景是3GPP LTE-Advanced系统中,采用多基站协作迸行干扰冲突避免的情况,即通过协作的多个基站之间部分共享用户的信道信息,根据部分共享的信道信息调整本小区的用户调度,从而达到降低对临小区干扰的目的。 Scene DETAILED DESCRIPTION The present invention is directed to 3GPP LTE-Advanced system, uses multi-base station cooperation into line interference collision avoidance, channel information, i.e., by partially sharing a user among a plurality of base stations cooperating and partial shared channel this adjustment information cell user scheduling, so as to achieve the purpose of reducing interference to neighbor cells. 另外,对于现有方法中需要一个主调度器的方法,虽然该主调度器可以是与多个基站独立的一个实体,也可以是多个参与协作的基站中的一个;但是如何确定该主调度器,该主调度器需要那些额外的资源、配置等,都是需要解决的问题,并且如何在多个基站之间实现实时的通信,仍然是难以解决的现实问题。 Further, the conventional method requires a master scheduler method, although the master scheduler may be a plurality of base stations with a separate entity, may be a plurality of base stations participating in a collaborative; however, how to determine the master scheduler is the master scheduler need those additional resources, configuration, etc., are needed to solve the problem, and how to achieve real-time communication between multiple base stations, it is still difficult to solve practical problems. 因此,本发明提供的方法是基于多基站协作中, 参与协作的基站部分共享信道信息,独立进行多用户调度的场景。 Accordingly, the present invention provides a method based on the scene is a multi-base station cooperation, the base stations participating in collaboration partially shared channel information, independent multi-user scheduling. 后文所指的邻近小区是指在多基站(多小区)协作中,除了本基站以外参与协作的各基站所在的小区。 Hereinafter referred to neighboring cell refers to a base station in a multi-cell (multi-cell) collaboration, each base station in addition to participating in collaboration present resides. 现有的多基站协作方法都没有考虑HARQ (Hybrid Automatic Repeat reQnest,混合自动重传)。 Conventional multi-base station cooperation methods are not considered HARQ (Hybrid Automatic Repeat reQnest, hybrid automatic retransmission). HARQ是为了保证业务质量而对错误的数据包进行重新传输的方法。 HARQ is a method in order to guarantee service quality to the error retransmission packets. 由于信道的不可预测性和衰落特性,总是存在错误的数据包,因此通过HARQ机制进行重传,从而保证业务质量。 Due to the unpredictable fading characteristics and channel, there is always an error packet, and therefore retransmission by HARQ mechanisms to ensure quality of service. 为了简化分析, 以两个基站参与协作进行分析,假设两个基站当前服务的用户的误包率分别为P1、 P2, 0<=P1、 P2<=1,则两个基站当前服务的两个用户同时出错的概率为PA^PPP2,而两个基站当前服务的用户仅有一个出错的概率位于区间PBe[max (Pl, P2) , P1+P2],其中[a,b]表示范围从a到b的区间,max(c,d) 表示参数c和d中的最大值。 To simplify the analysis, to analyze the two base stations participating in collaboration, packet error rate is assumed two users are currently serving base station P1, P2, 0 <= P1, P2 <= 1, then the two base stations currently serving two while the probability of error for the user PA ^ pPP2, and the probability of the current user and services of the two base stations only an error in the interval PBe [max (Pl, P2), P1 + P2], where [a, b] represents a range from to the interval b, max (c, d) represents the maximum value in the parameters c and d. 由于0《P1、 P2<=1,所以PB > PA, 例如当Pl-P2-0.1时,PA二O.Ol, PBG[Ol, 0.2],此时PB〉-10承PA。 Since 0 "P1, P2 <= 1, so PB> PA, for example when Pl-P2-0.1, PA two O.Ol, PBG [Ol, 0.2], this time PB> -10 bearing PA. 因此,在大多数情况下,与两个基站当前服务的两个用户同时出错的概率相比,两个基站当前服务的用户仅有一个出错的概率要大一些。 Therefore, in most cases, the probability of two users currently serving base station while two errors compared to two users currently serving base station is only one of the bigger mistakes. 尤其在多基站协作模式下, 参与协作的用户都位于小区边界,因为误包率更大,所以PB/PA就更大。 In particular, in multi-mode base station cooperation, the user participating in collaboration are located in the cell boundary, because a greater packet error rate, so PB / PA is even greater. With

此类推,多基站当前服务的用户仅有一个出错的概率要比多个用户出错的概率更大。 Such push-user multi-base station currently serving the probability of error is only one of the bigger mistakes than the probability of multiple users. 本发明的技术方案的核心思想是:在参与协作的基站进行多用户调度的时候,通过判断当前的数据包是否是重传数据包,来确定是否主动降低对邻近小区的干扰。 The core idea of ​​the present aspect of the invention is that: when the multi-user scheduling in the base station participating in collaboration, by judging whether the current packet is a retransmission data packet, to determine whether the active to reduce interference to neighboring cells. 如果是重传数据包,此时的调度思想是尽可能的降低对邻近小区的干扰;因为对于重传的数据包,终端将重传的数据包与初始传输的数据包进行合并,通过提供分集增益来降低误包率。 If the packet is retransmitted data, in this case the scheduling idea is to reduce interference to neighboring cells as much as possible; as for the retransmitted data packet, the terminal data packet retransmitted packets are combined with the initial transmission, by providing diversity gain to reduce the packet error rate. 因此,对于重传数据包, 不需要非常精确的保证它的性能,选择与本小区相关性大、并且与邻近小区相关性小的、优先级最高的PMI来迸行HARQ包的调度。 Thus, for the retransmitted data packet, does not require very precise to ensure its performance, the present selection and correlation of large cell, and neighboring cells associated with the small, the highest priority to a PMI HARQ packet is scheduled into line. 本发明提供了一种多基站协作系统中的数据传输方法,适用于参与协作的基站部分共享信道信息,独立进行多用户调度的情况,包括:各次进行多用户调度时,对于本小区中当前传输重传数据包的终端,基站选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使该终端能得到最高调度优先级的信道信息更新该终端对应的信道信息;然后基站根据本小区各终端对应的信道信息选择调度优先级最高的终端进行数据传输。 The present invention provides a data transmission method in a multi-base station cooperation system for base station part shared channel information participating in collaboration, independent multi-user scheduling, comprising: each time multi-user scheduling time, with the present cell current terminal transmits the retransmission packet, the base station selects this cell terminal channel response associated large or small adjacent cell terminal channel response and makes the terminal can get the highest scheduling priority channel information update channel information corresponding to the terminal ; then the base station of the present cell according to channel information corresponding to each terminal to select the highest priority scheduling terminals for data transmission. 可选的,基站选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使该终端能得到最高调度优先级的信道信息更新该终端对应的信道信息具体可以包括:基站选择与本小区终端反馈的PM^的相关性大于或等于预定门限值P 1的各PMI组成集合S1;选择与邻近小区终端反馈的PMl2的相关性小于或等于门限值P 2的各PMI组成集合S2;得到S1和S2的交集S;对于每个当前传输重传数据包的终端,分别从集合s中选择该终端能够得到最高调度优先级的PMI作为该终端的PMI 。 Alternatively, the base station selects this cell terminal channel response associated large or Small adjacent cell terminal channel response and makes the terminal can get the highest scheduling priority channel information update channel information corresponding to the terminal specifically comprises: the base station selects this cell terminal feeds the PM ^ correlation equal to or greater than a predetermined threshold value P of each of the compositions set Sl PMI 1; neighboring cell selecting terminals PMl2 relevance feedback is less than or equal to the threshold P 2 each PMI composition set S2; S1 and S2 obtained intersection s; each of the terminal for the current transmission is retransmission data packet, respectively, selected from a set terminal s can be obtained in the highest scheduling priority PMI PMI as the terminal. 当然,实际应用时,更新信道信息不限于仅指更新PMI,比如也可以更新CQI,然后根据更新后的CQI来调整预编码矩阵;或直接更新预编码矩阵。 Of course, the actual application, update the channel information is not limited to refer only to update the PMI, CQI can be updated for example, and then to adjust the pre-coding matrix according to the updated CQI; or directly update the precoding matrix.

对于Pl,用于选择与当前本小区终端的PMI相关性较强的PMI,因此当P l较大时,例如0.8, 0.9,则被选择的PMI与当前本小区终端的PMI相关性较强,此时由于更改PMI带来的性能恶化较小;对于P2,用于选择与当前邻近小区终端的PMI相关性较弱的PMI,因此当P2较小时,例如0.4, 0.5,则被选择的PMI与当前邻近小区终端的PMI相关性较弱,此时对邻近小区的干扰较小。 For Pl, for selecting the current PMI PMI strong correlation between the present cell terminal, so that when a large P l, for example 0.8, 0.9, were selected PMI and PMI current terminal of the present cell strong correlation, At this time, due to the small change of the performance deterioration caused PMI; for P2, for selecting a current cell of the terminal neighboring PMI PMI weak correlation, so when P2 is small, for example 0.4, 0.5, and were selected PMI the current cell of the terminal neighboring PMI weak correlation, so a smaller interference to the neighboring cells. Pl、 P2的选择可以根据经验值或仿真值得到,可以相同或不同。 Pl, P2 can be worth the selection may be the same or different values ​​based on experience or simulation. 可选的,P l可以但不限于为0.5。 Alternatively, P l may be, but is not limited to 0.5. 可选的,P2可以但不限于为0.5。 Alternatively, P2 may be, but is not limited to 0.5. 可选的,如果集合S是空集,则可以简单的令S^S1或者S^S2。 Alternatively, if the set S is an empty set, it is possible to make simple or S ^ S1 S ^ S2. 可选的,基站根据本小区各终端的信道信息选择调度优先级最高的终端进行数据传输可以但不限于按现有技术处理,比如按照上面步骤103、 104进行处理;需要注意的是,此时当前传输重传数据包的终端的信道响应不再是该终端所反馈的信道信息,而是基站更新后的信道信息。 Alternatively, the base station performs the scheduling based on the channel selection information of each terminal of the present cell with the highest priority terminals may be, but is not limited to the data transmission processing according to the prior art, such as processed according to the above steps 103, 104; should be noted that, at this time the current channel terminal transmission of data packets retransmitted in response to the channel information is not fed back to the terminal, the channel information is updated, but the base station. 可选的,对于当前传输的数据包不是重传数据包的终端,则可以但不限于按现有技术处理,直接利用其反馈的信道信息来进行调度。 Alternatively, the terminal for the currently transmitted packet is not retransmitted data packet, but is not limited to the process can be according to the prior art, the direct use of channel feedback information to perform its scheduling. 可选的,各次进行多用户调度时,在判断当前传输的数据包是否为重传数据包前还包括:基站发送导频序列给本小区的终端和邻近小区的终端;这里可以但不限于按现有技术进行;各收到导频序列的终端根据该导频序列对本终端的信道响应进行估计, 并将信道响应的估计结果作为信道信息反馈给基站;这里可以但不限于按现有技术进行。 Alternatively, each time when the multi-user scheduling, it is determined whether the currently transmitted data packet is a retransmitted data packet before further comprising: a base station transmitting a pilot sequence to a terminal of the present cell and neighboring cell, the terminal; here, but not limited to, carried out according to the prior art; each receive terminal of pilot sequences based on the pilot sequence to the channel of the terminal in response estimate, the estimation result of the channel response and the channel as the channel information to the base station; here but is not limited by the prior art get on. 本发明还提供了一种多基站协作系统中的基站,包括:用于接收及保存本小区终端和邻近小区终端所反馈的信道信息的接收单元;用于根据接收单元中保存的本小区各终端对应的信道信息,对调度优先级最高的终端进行调度的调度单元;用于使用接收单元中,调度单元所调度到的终端对应的信道信息对数据进行调制编码和预处理的数据处理单元、及用于发送处理后的数据的发送单元;上述单元的实现可以但不限于与现有技术相同。 The present invention also provides a multi-base station cooperation system, a base station, comprising: means for receiving and holding the received channel information terminal of the present cell and neighboring cell, the terminal fed back; for holding the receiving unit according to the present cell the terminals corresponding to the channel information, to the highest terminal scheduling priority scheduling scheduling unit; it means for using the received cell, the channel information by the scheduling unit to schedule the terminal corresponding to the data data processing unit modulation and coding and pretreatment, and transmitting means for transmitting processed data; means to achieve the above may be the same but are not limited to the prior art. 还包括:判断单元和更新单元;所述判断单元用于在每次收到各终端所反馈的信道信息后,判断本小区中各终端当前传输的是否为重传数据包,针对当前传输重传数据包的终端发送更新指令给更新单元;所述更新单元用于在收到所述更新指令后,选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使所述当前传输重传数据包的终端能得到最高调度优先级的信道信息,来更新接收单元中该终端对应的信道信息。 Further comprising: judging means and updating means; a means for determining, after each time it receives the channel information fed back by each terminal, it is determined whether the retransmitted data packet currently transmitted in the present cell each terminal, a retransmission for the current transmission the terminal transmits packet data update instruction to the update unit; the update unit after receiving the update instruction, the terminal selects the cell of the present correlation of large channel response associated with the neighboring small cell terminal channel response, and so the current terminal of said retransmitted data packet transmission can get the highest scheduling priority channel information to update channel information receiving unit corresponding to the terminal. 可选的,所述更新单元选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使所述当前传输重传数据包的终端能得到最高调度优先级的信道信息,来更新接收单元中该终端对应的信道信息具体可以是指:更新单元选择与本小区终端反馈的PM^的相关性大于或等于预定门限值P 1的各PMI组成集合S1,选择与邻近小区终端反馈的PMl2的相关性小于或等于门限值P 2的各PMI组成集合S2;得到S1和S2的交集S;对于当前传输重传数据包的终端,更新单元从集合s中选择该终端能够得到最高调度优先级的PMI来更新接收单元中该终端的PMI。 Alternatively, the update unit selected correlation large terminal is believed that the cell channel response associated small adjacent cell terminal channel response, and the terminal of the current transmission retransmitted data packets get the highest scheduling priority channel information to update channel information receiving unit corresponding to the terminal may specifically refer to: update unit selects this cell terminal feeds the PM ^ of correlation is greater than or equal to a predetermined threshold value P of each PMI 1 to form a set Sl, selected adjacent PMl2 cell terminal relevance feedback equal to or less than the threshold value P set S2 composed of each of the PMI 2; S1 and S2 obtained intersection s; current transmission to the terminal of the retransmitted data packet, the updating unit selected from the set terminal s of possible to obtain the highest scheduling priority to a PMI PMI update receiving unit of the terminal. 可选的,Pl可以但不限于为0.5。 Alternatively, Pl may be, but is not limited to 0.5. 可选的,P2可以但不限于为0.5。 Alternatively, P2 may be, but is not limited to 0.5. 可选的,如果集合S是空集,则更新单元可以令S二S1或者S-S2。 Alternatively, if the set S is an empty set, the updating unit S can make two or S1 S-S2. 可选的,所述发送单元还用于发送导频序列给本小区的终端和邻近小区的终端。 Optionally, the sending unit is further configured to transmit a pilot sequence to a terminal of the present cell and neighboring cell terminals. 其它实现细节可以同方法中所述。 Other implementation details may be the same process. 下面用本发明的一个实施例来进一步加以说明。 Further embodiments will be described below using an embodiment of the present invention. 实施例1的应用场景如图4所示;假设当前基站A和基站B工作在多基站协作干扰冲突避免的模式,终端A接入基站A所在小区,终端B接入基站B所在小区。 Example 1 of the application scenario shown in Figure 4; assumed that the current base stations A and B work in a multi-base station cooperative interference collision avoidance mode, the terminal accesses the base station A where the cell A, the terminal B where B cell access station. 终端A与终端B处于多基站协作模式,HAA是基站A到终端A的信道响应,HAB是基站A到终端B的信道响应,HBA是基站B到终端A的信道响应,HBB 是基站B到终端B的信道响应。 The terminal A and the terminal B in the multi-base station cooperative mode, HAA is a base station A to the channel terminal A response, HAB is a base station A to the channel terminal B response, HBA is the base station B to the terminal A of the channel response, HBB base station B to the terminal B channel response. 假设终端A当前传输的为重传数据包。 A terminal is assumed that the current transmission is retransmission data packet. 在部分信道信息共享的限制下,基站A能够获得HAA和HAB,基站B能够荻得Hba和Hbb。 In restricting portion shared information channel, the base station A and the HAB HAA can be obtained, the base station B can have Hba Di and Hbb. 对于基站A和基站B如何获得相应的信道信息,可以但不限于使用现有的相应方法,与本发明的关键点无关。 How base stations A and B obtain the corresponding channel information, but is not limited to the use of the appropriate conventional methods, regardless of the key points of the present invention. 该实施例如图5所示,包括:501、 下行导频信息发送,基站向其覆盖下的终端发送共知的伪随机序列。 For example the embodiment shown in FIG. 5, comprising: 501, transmits the downlink pilot information, the base station transmits a pseudorandom sequence known to the terminals under its coverage. 502、 信道估计及反馈,各终端利用导频信息进行信道估计,并将CQI 和PMI信息反馈到服务基站。 502, and a feedback channel estimates, each terminal using pilot information for channel estimation and CQI and PMI feedback to the serving base station. 其中,対于信道Haa,是由终端A反馈CQlAA和PMUA给基站A,其它信道类推。 Wherein Haa Dui channel, by the terminal A and PMUA CQlAA feedback to the base station A, and so on other channels. 503、 每个基站一一判断各终端当前的数据传输是否是新数据包,对于是新数据包的终端,转到504处理;对于是重传数据包的终端,转到505。504、 此时不需要考虑对邻小区的干扰,基于尽可能保护新数据包的思想,直接将终端反馈的信道信息作为该终端对应的信道信息;执行506。505、 服务基站根据当前传输对邻小区的干扰(根据邻小区终端反馈的PMIAB),基于预先设定的门限值P 1, P2,调度终端即相应的PMI使需要重传数据包的终端的调度优先级最高;其中该用户的PMI应该从如下范围内进行选择;S=S10S2Sl={PMIk, PMIk和PMIaa的相关性大于或等于P 1} S2={ PMIk, PMIk和PMIab的相关性小于或等于P 2}其中集合Sl中对应的PMI表示与用户A反馈的PMlAA相关性较大的PMI, 从而保证用户A的性能的恶化被限制在某个范围之内;集合S2对应的集合表示其中的PMI与对邻小区的干扰PMlAB 503, eleven each base station determines whether the current data transmission for each terminal whether it is a new packet, the terminal for a new packet, the processing to 504; the terminal for the retransmission packet, to 505.504, then no need to consider the interference of the adjacent cell, based on the idea of ​​a new packet is protected as far as possible, directly to the terminal feeds back channel information as the channel information corresponding to the terminal; 506.505 performed, the serving base station of the adjacent cell interference based on the current transmission ( the terminal feeds the neighbor cell PMIAB), based on a predetermined threshold value P 1, P2, i.e. the corresponding terminal is scheduled to make PMI scheduling data packet to be retransmitted highest priority terminal; wherein the user should PMI from the following is selected within the range; S = S10S2Sl = {PMIk, PMIk and PMIaa of correlation is greater than or equal to P 1} {correlation PMIk, PMIk and PMIab less than or equal to P 2} S2 = where the corresponding set Sl in PMI represents a user relevance feedback PMlAA larger PMI, to ensure deteriorate the performance of the user a is limited within a certain range; collection set S2 corresponding to a PMI which indicates interference in neighboring cells PMlAB 之间的相关性小于门限P 2,即对邻近 The correlation between the threshold smaller than the threshold P 2, i.e., on adjacent

小区的干扰被限制在某个范围之内。 Cell interference is limited within a certain range. 因此,本发明保证在本小区信号恶化不大的同时尽可能降低对邻小区的干扰。 Accordingly, the present invention ensures to reduce interference to neighboring cells is not possible in the present cell signal degradation at the same time. 假设终端A和用户B是当前正在尝试的用户组合;发送天线数为2,预编码矩阵为W-[l 1; 1 (lj)/sqrt(2); 1 —j; 1 (小j)/sqrt(2); 1 -1; 1 (-l+j)/sqrt(2);lj; 1 (l+j)/sqrt(2);]./sqrt(2),该预编码码书包括8个2"的向量。终端A反馈的PMK, 即对应于向量[l 1]./sqrt(2);终端B反馈的PMIM,即对应于向量[l (-lj)/sqrt(2)]./sqrt(2)。 Pl二P 2=0.5。预编码矩阵W的相关矩阵如下:Correlation (w, w)= l細0 0.9239 0.7071 0.3827 0 0.3827 0.7071 0.92390.9239 l細0 0.9239 0.7071 0.3827 0細0 0.3827 0.70710.7071 0.9239 l扁0 0.9239 0.7071 0.3827 0細0 0.38270.3827 0.7071 0.9239 1.0000 0.9239 0.7071 0.3827 0細00 0.3827 0.7071 0.9239 l細0 0.9239 0.7071 0.38270.3827 0細0 0.3827 0.7071 0.9239 l細0 0.9239 0.70710.7071 0.3827 0扁0 0.3827 0.7071 0.9239 l細0 0.92390.9239 0.7071 0.3827 0細0 0.3827 0.7071 0.9239 l細0在基站A调度过程中计算尝试终端A的时候,S1={PMI=1, 2, 3, 7, 8}(如上面相关矩阵第一行中第一、 It assumed that the terminal A and the user B is currently attempting a combination of users; number of transmission antennas is 2, the precoding matrix is ​​W- [l 1; 1 (lj) / sqrt (2); 1 -j; 1 (Small j) / sqrt (2); 1 -1; 1 (-l + j) / sqrt (2); lj; 1 (l + j) / sqrt (2);] ./ sqrt (2), the precoding codebook comprising . 8 2 "terminal a vector feedback PMK, i.e. corresponding to the vector [l 1] ./ sqrt (2); the feedback terminal B PMIM, i.e. corresponding to the vector [l (-lj) / sqrt (2)] .. ./sqrt(2) Pl two P 2 = 0.5 precoding matrix W of the correlation matrix as follows: correlation (w, w) = l fine 0 0.9239 0.7071 0.3827 0 0.3827 0.7071 0.92390.9239 l 0 0.9239 0.7071 0.3827 0 fine fine 0 0.3827 0.70710.7071 0.9239 l flat 0.9239 0.7071 0.3827 0 0 0.7071 0.9239 0.38270.3827 fine 0 0.3827 0 1.0000 0.9239 0.7071 00 0.3827 0.7071 0.9239 l fine fine fine 0 0 0 0.9239 0.7071 0.38270.3827 0.3827 0.7071 0.9239 0.9239 0.70710 0 L fine. 7071 0.3827 0 0 0.3827 0.7071 0.9239 l flat thin 0.92390.9239 0.7071 0.3827 0 0 0 0.3827 0.7071 fine fine 0 0.9239 l when the base station a is calculated during scheduling attempts terminal a, S1 = {PMI = 1, 2, 3, 7 , 8} (e.g., above the first row of the correlation matrix of the first, 二、三列,及倒数第一、二列所示),S2^PMI =1, 7, 8}(如上面相关矩阵第四行中第一列,及倒数第一、第二列所示), 因此S^PMK, 7, 8},此时,对于终端A,从S中选择使终端A能够得到最高调度优先级的PMI,以及用所选择的PMI对应的调度优先级作为终端A的调度结果;然后基站A再以相同的方法尝试小区A中其他的当前传输重传数据包的终端。基站B也以相同的方法进行操作;然后执行步骤506。506、基站比较所有的终端的调度结果,从中选择调度优先级最高的终端;即执行:(UE(调度到),PMI}=arg{r^,'k,毎个用户对应的PM!集合s(k"max R (用户k, S(k)) 其中R (用户k, S(k))表示用户K对应于集合S(k)中的PMI的优先级;具体调度优先级的定义依赖于相应的调度算法;该步骤可以但不限于按照现有的方式(比如前文的步骤103)进行。 Two, three, and a first countdown, as shown), S2 ^ PMI = 1, 7, 8} (as in the fourth row first column of the correlation matrix above two, and the last first, in the second column) Therefore S ^ PMK, 7, 8}, in this case, the terminal a, the terminal a can be selected so that the highest scheduling priority PMI, PMI and corresponding to a selected priority scheduling as the scheduling of the terminal a from S results; base station a then attempting the same manner as the other terminal of the cell a in the current transmission is retransmission data packet the base station B also operates in the same manner;. 506.506 then step, all the scheduling result of the comparison of the terminal station , select schedule the highest priority terminal; i.e. performs: (UE (scheduled), PMI} = arg {r ^, 'k, every user corresponding to the PM collection s (k "max R (user k, S! (k)) where R (user k, S (k)) indicates that the user K corresponding to the set of PMI (k) in S priority; specific scheduling priority definition depends on the respective scheduling algorithm; this step may be, but are not limited according to conventional manner (such as the foregoing step 103).

507、下行数据和信令传输和接收,基站根据多用户调度的结果,使用被调度到的终端的CQI和PMI对当前传输的数据进行调制编码和预处理,然后在相应的下行信道传输信令和数据。 507, and signaling downlink data transmission and reception, the base station based on a result of multi-user scheduling, scheduled to use the CQI and PMI terminals currently transmitted data is modulated and pre-coding, then the corresponding downlink channel transmitting signaling and data. 终端根据接收到的下行信令进行数据接收、检测、解调、解码等操作。 Data reception terminal according to the received downlink signaling detection, demodulation, decoding, and other operations. 该步骤可以但不限于按照现有的方式(比如前文的步骤104)进行。 This step may be, without limitation, according to conventional manner (such as the foregoing step 104). 需要指出的是,如果被调度到的终端当前传输的为新数据包,则可以按现有技术采用该终端反馈的CQI和PMI进行调制编码和预处理;而如果被调度到的终端当前传输的为重传数据包,由于调度时考虑的是基站更新后的PMI,因此此时也是采用基站更新后的PMI进行调制编码和预处理。 It is noted that, if the terminal is scheduled to a currently transmitted packet data is new, according to the prior art can be fed back to the terminal using CQI and PMI pre-coding and modulating; if the terminal is scheduled to a currently transmitted retransmission data packet, since the scheduling is considered the base station updates the PMI, PMI and therefore at this time is employed for the base station updates the coding and preconditioning modulation. 当然,本发明还可有其他多种实施例,在不背离本发明精神及其实质的情况下,熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形,但这些相应的改变和变形都应属于本发明的权利要求的保护范围。 Of course, the present invention may have many other embodiments without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and variations according to the present invention, these corresponding modifications and variations shall fall into the scope of the invention as claimed in claims.

Claims (10)

1. 一种多基站协作系统中的数据传输方法,包括:各次进行多用户调度时,对于本小区中当前传输重传数据包的终端,基站选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使该终端能得到最高调度优先级的信道信息更新该终端对应的信道信息;然后基站根据本小区各终端对应的信道信息选择调度优先级最高的终端进行数据传输。 1. A data transmission method in a multi-base station cooperation system, comprising: each time when the multi-user scheduling, to the terminal of the present cell in the current transmission data packet retransmission, the base station selects a terminal with the cell of the present large channel response correlation, and neighboring cell terminal channel response correlation is small, and so the terminal can get the highest scheduling priority channel information update channel information corresponding to the terminal; and a base station selective scheduling highest priority terminal according to the cell corresponding to each terminal channel information data transmission.
2. 如权利要求1所述的数据传输方法,其特征在于,基站选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使该终端能得到最高调度优先级的信道信息更新该终端对应的信道信息具体包括:选择与本小区终端反馈的PMIi的相关性大于或等于预定门限值pl的各PMI组成集合S1;选择与邻近小区终端反馈的PMl2的相关性小于或等于门限值P 2的各PMI组成集合S2; 得到S1和S2的交集S;对于每个当前传输重传数据包的终端,从集合s中选择该终端能够得到最高调度优先级的PMI作为该终端的PMI。 2. The data transmission method according to claim 1, characterized in that the base station select the relevant large terminal is believed that the cell channel response, the neighboring cell terminal channel response correlation is small, and so the terminal can get the highest scheduling priority channel information update channel information corresponding to the terminal comprises: selecting this cell terminal feedback PMIi of correlation is greater than or equal to a predetermined threshold value for each PMI pl composition set Sl; selecting neighboring cell terminal feedback PMl2 of correlation is less than or equal to the threshold P 2 each composed of a set of PMI S2; S1 and S2 obtained intersection s; each of the terminal for the current transmission retransmitted data packet, select the set terminal s can be obtained from the highest scheduling priority as a PMI PMI of the terminal.
3. 如权利要求2所述的数据传输方法,其特征在于:Pl为0.5。 The data transmission method according to claim 2, wherein: Pl 0.5.
4. 如权利要求2所述的数据传输方法,其特征在于:P2为0.5。 4. The data transmission method according to claim 2, wherein: P2 is 0.5.
5. 如权利要求2所述的数据传输方法,其特征在于:如果集合S是空集,则令S:S1或者S二S2。 5. The data transmission method according to claim 2, wherein: if the set S is an empty set, then let S: S two or Sl S2.
6. —种多基站协作系统中的基站,包括:用于接收及保存本小区终端和邻近小区终端所反馈的信道信息的接收单元、用于根据接收单元中保存的本小区各终端对应的信道信息,对调度优先级最高的终端进行调度的调度单元、用于使用调度单元所调度到的终端对应的信道信息对数据进行调制编码和预处理的数据处理单元、及用于发送处理后的数据的发送单元;其特征在于,还包括:判断单元和调度单元;所述判断单元用于在每次收到各终端所反馈的信道信息后,判断本小区中各终端当前传输的是否为重传数据包,针对当前传输重传数据包的终端发送更新指令给更新单元;所述更新单元用于在收到所述更新指令后,选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使所述当前传输重传数据包的终端能得到最高调度优先级的 6. - kind of multi-cell cooperative system, a base station, comprising: means for receiving and holding the received channel information terminal of the present cell and neighboring cell, the terminal fed back, stored in the receiving unit according to the present in the cell corresponding to each terminal channel information terminal highest scheduling priority scheduling unit performs scheduling for scheduling using the channel information scheduled to the terminal unit corresponding to the data processing unit performs data modulation and coding preprocessing, and sends the processed data for a transmission unit; characterized by further comprising: a determination unit and a scheduling unit; means for determining, after the receipt of each channel information fed back by each terminal determines whether retransmission currently transmitted in the present cell the terminals data packet for the current transmission terminal transmits the retransmission data packet to the update unit update instruction; the update unit after receiving the update instruction, the terminal selects the cell of the present large channel response associated with the neighboring cell channel a terminal response correlation is small, and the terminal of the current transmission packet is retransmitted to get the highest scheduling priority 道信息,来更新接收单元中该终端对应的信道信息。 Channel information to update channel information receiving unit corresponding to the terminal.
7. 如权利要求6所述的基站,其特征在于,更新单元选择与本小区终端信道响应相关性大、与邻近小区终端信道响应相关性小、并且使所述当前传输重传数据包的终端能得到最高调度优先级的信道信息,来更新接收单元中该终端对应的信道信息具体是指:更新单元选择与本小区终端反馈的PMI,的相关性大于或等于预定门限值P 1的各PMI组成集合S1,选择与邻近小区终端反馈的PMl2的相关性小于或等于门限值P 2的各PMI组成集合S2;得到S1和S2的交集S;对于每个当前传输重传数据包的终端,更新单元从集合s中选择该终端能够得到最高调度优先级的PMI来更新接收单元中该终端的PMI。 The base station according to claim 6, characterized in that the update unit selected channel associated with the terminal of the present cell large channel response associated with the neighboring small cell terminal in response to the channel, and the terminal of the current transmission is retransmission data packet to get the highest scheduling priority channel information to update channel information receiving unit corresponding to the terminal in particular: updating unit selects a PMI of the present cell terminal feedback, the correlation is greater than or equal to a predetermined threshold value P for each 1 PMI grouped into sets S1, selecting a neighboring cell terminal feeds PMl2 correlation is less than or equal to the threshold P 2 each composed of a set of PMI S2; S1 and S2 obtained intersection S; for each current transmission packet retransmission data terminal updating unit selected from a set terminal s can be obtained in the highest scheduling priority to a PMI PMI update receiving unit of the terminal.
8. 如权利要求7所述的基站,其特征在于:P 1为0.5。 The base station as claimed in claim 7, wherein: P 1 is 0.5.
9. 如权利要求7所述的基站,其特征在于:P2为0.5。 The base station as claimed in claim 7, wherein: P2 is 0.5.
10. 如权利要求7所述的基站,其特征在于:如果集合S是空集,则更新单元令S=S1或者S=S2。 10. The base station according to claim 7, wherein: if the set S is an empty set, so that the updating unit or S = S1 S = S2.
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