摘要：

为消减超密集网络中小小区间的干扰,提出多点协作联合传输场景中一种以用户为中心的半动态分簇方法。对网络内的所有小基站进行不重叠分簇,将簇内的小基站及位于簇外但与该簇存在较大干扰的小基站作为用户的备选服务基站,采用迫零预编码消除备选服务基站中的非服务基站对用户的干扰,用户从备选服务基站中选出若干待选服务基站,簇头以最大化簇内用户吞吐量之和为目标从待选服务基站中为用户选择服务基站簇。同时给出一种次优的为用户选择服务基站簇的方法以降低复杂度。仿真结果表明,与相同场景中的已有方案相比,该方法明显提高系统吞吐量。

关键词: 超密集网络, 多点协作, 联合传输, 半动态分簇, 吞吐量

Abstract:

In order to decrease the interference between small cells in Ultra Dense Network(UDN),this paper a propose an user-centric semi-dynamic clustering method for Coordinated Multiple Point(CoMP) Joint Transmission(JT) scenarios.It divides small stations into non-overlapping clusters,and takes the small stations in the cluster and the small stations located outside the cluster but having large interference with the cluster as the optional service stations of the user.Zero-forcing precoding is used to eliminate interference to users from non-serving base stations in the optional service stations.Users select a number of candidate service stations from the optional service stations service and selected the cluster heads,with the goal of maximizing the sum of throughput of each user select the station clusters for users from the optional service stations.At the meanwhile a suboptimal method for selecting service station clusters for users is given to reduce the complexity.Simulation results show that compared with the existing scheme in the same scenario the proposed scheme improves the system throughput.

Key words: Ultra Dense Network(UDN), Coordinated Multiple Point(CoMP), Joint Transmission(JT), semi-dynamic clustering, throughput

中图分类号: 

• TP391