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基于SINR的TDD-CDMA分层小区系统接入控制

Call Admission Control in TDD-CDMA-HCS System
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摘要 提出一种基于信干噪比(SINR)的接入控制方法,解决时分双工码分多址(TDD-CDMA)分层小区系统TDD-CDMA -HCS的接入控制问题.在定义系统效用函数的基础上,结合资源使用情况同时采用负载层选策略和层间溢出调整策略判断用户是否能够接入.仿真结果表明:在用户分布异常时,所提分层接入控制方法能充分挖掘分层小区带来的分集效应,有效降低系统呼叫阻塞概率和系统中断概率,明显改善系统性能. Call admission control based on SINR is proposed to solve the admission problem of TDD-CDMA-HCS (time division duplexing-code division multiple access-hierarchical cell structure) system. Based on the definition of a system utility function, decision of admission is made according to the usage of resources. Both inter-layer call overflow and system-load based layer selection are implemented. Simulation results show that the call block ratio and the system drop-out ratio decrease significantly, resulting in considerable improvement of the system performance.
出处 《应用科学学报》 CAS CSCD 北大核心 2009年第3期221-225,共5页 Journal of Applied Sciences
基金 国家"863"高技术研究发展计划基金(No.2007AA01Z207) 新世纪人才基金 东南大学移动通信国家重点实验室研究课题基金(No.2008A06)资助项目
关键词 接入控制 分层小区结构 溢出调整 负载层选 信干噪比 call admission control, hierarchical cell structure, overflow, layer selection, SINR
作者简介 通信作者:陈明,教授,博导,研究方向:移动通信系统中的基带信号处理及无线资源管理等,E-mail:chenming@seu.edu.cn
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