异构无线网络中边缘用户小区选择算法  

Cell Selection Algorithm for Edge Users in Heterogeneous Wireless Network

作　　者：赵振东[1] 牛伟娇 韩东升[1] 丁莎莎[1] 

机构地区：[1]华北电力大学电气与电子工程学院,保定071003

出　　处：《电信科学》2015年第12期52-57,共6页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.61302106);河北省自然科学基金资助项目(No.F2014502029);中央高校基本科研业务费专项资金资助项目(No.2014MS100)~~

摘　　要：在异构网络中,部署多种小功率基站,会出现大量的"小区边缘区域",边缘用户的性能会受到影响。为此,提出了一种边缘用户小区选择算法,通过发送端进行预编码抑制干扰,提高用户接收到的信干噪比。根据小区当前用户数,动态地调整给微小区边缘用户参考接收信号添加的偏置值,避免边缘用户接入用户数过多的拥堵小区。仿真结果表明,该算法与参考算法相比,能够有效降低宏小区负载,平衡不同微小区间负载,提高轻载微小区的网络吞吐量和资源利用率。A large number of ＂cell-edge area＂ can arise when deploying a variety of low-power base stations in heterogeneous networks, this can affect the property of edge users. So a cell selection algorithm for edge user was proposed, by using the transmitting end to precoding to suppress interference and improve user received signal-to-interference-plus-noise-ratio （SINR）. According to the current number of user in the cell, dynamically adjust the reference received signal added bias to the picocell edge users, to avoid edge users accessing heavy loaded cells. The simulation results show that, compared with the reference algorithms, the proposed algorithm can effectively reduce the load of macrocells, balance the load between different picocells and improve the throughput and resource utilization of the light load picocells.

关 键 词：异构网络 小区选择 负载均衡 吞吐量 

分 类 号：TN915.61[电子电信—通信与信息系统]