虚拟小区中基于接入控制的负载均衡算法研究  

Research on load balancing algorithm based on access control in phantom cell

作　　者：楚纵姗 张晓阳 谭冲[1] 郑敏[1] CHU Zong-shan;ZHANG Xiao-yang;TAN Chong;ZHENG Min(Shanghai Institute of Microsystem and Information Technology,CAS,Shanghai 200050,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050 [2]中国科学院大学,北京100049

出　　处：《电子设计工程》2018年第22期51-56,共6页Electronic Design Engineering

基　　金：国家自然科学基金资助项目(61401445);国家高技术研究发展计划(863)项目(2015AA01A702)

摘　　要：虚拟小区是一种与宏蜂窝小区联合运行的微小区,主要建立在边缘区域和热点区域。这部分区域的容量和吞吐量对系统整体的容量和吞吐量影响极大,负载均衡方案主要研究如何提高这部分用户的吞吐量,并保证用户对资源使用的公平性。本文首先建立了一个宏基站下属4个虚拟小区的虚拟小区簇模型,指出了基础的Max-RSRP算法的不足,然后在此基础上提出了基于负载修正的固定偏置算法和基于负载修正的动态偏置算法,根据具体的场景进行了系统仿真,对比了系统吞吐量、负载均衡度、系统总切换次数随用户数变化的曲线。结果表明,动态偏置算法的负载均衡效果最好,用户数为100时吞吐量提升约为55%,固定偏置算法的均衡效果和对吞吐量的提升稍次之。但在用户数较大时固定偏置算法在能效上优于动态偏置算法。本文提出的算法有效地提高了系统性能,充分利用了系统资源,增加了吞吐量并保证虚拟小区间负载的均衡性。Phantom cell is a type of microcell that operates in conjunction with a macro cell,mainly in the edge and hotspot areas.The load balancing solution mainly studies how to increase the throughput of this part of users and ensure the fairness of users for resource utilization.In this paper,we first establish a phantom cell cluster model of 4 phantom cells under the macro base station and point out the shortcomings of the basic Max-RSRP algorithm.then we propose a fixed-offset algorithm based on load correction and a dynamic bias algorithm based on load correction.The results show that dynamic offset algorithm has the best load balancing effect.When the number of users is 100,the throughput increase is about 55%.However,the fixed bias algorithm is superior to the dynamic bias algorithm in energy efficiency when the number of users is large.The proposed algorithm effectively improves system performance,makes full use of system resources,increases throughput and ensures load balancing among phantom cells.

关 键 词：虚拟小区 动态偏置 系统吞吐量 负载均衡 

分 类 号：TN911.4[电子电信—通信与信息系统]