计算机与现代化

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 一种TD-LTE与eHRPD系统重叠覆盖下的负载均衡算法

  

  1. 1.重庆邮电大学通信与信息工程学院,重庆400065;2.电子科技大学通信与信息工程学院,四川成都611731
  • 收稿日期:2016-09-07 出版日期:2017-05-26 发布日期:2017-05-31
  • 作者简介: 李永刚(1976-),男,河南濮阳人,重庆邮电大学通信与信息工程学院副教授,硕士生导师,博士,研究方向:新一代移动通信网; 岳文涛(1991-),男,河南驻马店人,硕士研究生,研究方向:5G移动通信系统; 李龙江(1976-),男,河南三门峡人,电子科技大学通信与信息工程学副教授,硕士生导师,博士,研究方向:无线移动通信网。
  • 基金资助:
     国家自然科学基金资助项目(61273235); 国家863计划项目(2015AA01A705); 重庆市博士后特别资助项目(Xm2015022); 重庆市科委前沿计划项目(cstc2015jcyjA40019)

  A Load-balancing Algorithm in Overlapping System of TD-LTE and eHRPD

  1. 1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; 
    2. School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
  • Received:2016-09-07 Online:2017-05-26 Published:2017-05-31

摘要:  针对3G的eHRPD和4G的TD-LTE移动通信系统进行混合组网时,每种网络制式下的小区在用户增多时都有可能过载,除了传统的与邻近小区进行基站的切换,还可以在不同制式之间进行垂直切换。本文以网络资源利用率为参考,对系统内的用户进行异系统垂直切换,从而使混合组网后的系统负载得到均衡。通过该整合系统的仿真,在保证无线链路丢失率不受显著影响前提下,该方法使得蜂窝小区的平均吞吐率有所提高,并能找到使得吞吐率最大时的最佳切换阈值。

关键词:  , 负载均衡, 切换, 重叠覆盖, 吞吐量, 调度

Abstract:  In view of the hybrid system of eHRPD in 3G and TD-LTE in 4G, the cell will overload with the increase of users. The vertical handover between the different standards can be applied besides the traditional handover of the neighboring cells. This paper studies the load balancing in the hybrid network of eHRPD and TD-LTE. The proposed algorithm refers to the network resource utilization when the users are handed off. Therefore, the load in the hybrid network can be balanced. Through the simulation of the integrated system, our scheme can enhance the average throughput while the radio link failure is unaffected. Moreover, the best handover thresholds can be obtained with the largest throughput.

Key words:  load balancing, handover, overlapping, throughput, scheduling