多基站协作系统中基于机会SDMA的用户调度算法

Opportunistic SDMA algorithm for user scheduling in the multi-base station coordination system

为解决多基站协作系统调度用户时需要较大的信息反馈,提出了一种基于机会SDMA的用户调度算法。算法中每个基站采用正交随机向量作为波束成形向量,参与协作的各基站间通过高速链路共享波束成形信息。在接收端计算每个用户的SINR,发送端选择SINR最大的用户作为调度用户。采用该算法进行用户选择时,不需要考虑干扰小区的用户选择结果,很好的解决了多基站协作调度的困难,每个用户只需要反馈少量信息,极大地降低了反馈量,并获得了系统容量的增益。

In order to resolve too much feedback information in the transmitter for user scheduling in the multi-base station coordination system,an opportunistic SDMA algorithm is proposed in this paper. An orthogonal random vector of each base station is regarded as the beamforming vector in this algorithm,and the information of beamforming is shared by base stations through high speed link. The SINR of each user is calculated in the receiver,and the user with the highest SINR will be scheduled by the transmitter. For user scheduling without the selection results of interfering cells in the proposed algorithm,the scheduling problem is well solved. For each user it only needs a little feedback information in the algorithm,the feedback information is greatly reduced,and the system capacity gain is obtained in the algorithm.