混合信道分配参数分析及自适应混合信道分配方案  

Parameter Analysis of Hybrid Channel Assignment and Application to Adaptive Hybrid Channel Assignment

作　　者：程江[1] 朱世华[1] 党安红[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《西安交通大学学报》2001年第3期312-315,共4页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金!资助项目 (6 96 72 0 17);西安交通大学重点培植项目! (PZ0 0 7)

摘　　要：对混合信道分配 (HybridChannelAssignment ,HCA)中的动静信道比例与阻塞率之间的关系进行了分析 .分析表明 ,不同动静信道比的HCA方案在不同的话务量情况下呈现出不同的性能 ,无法在各种负荷下均保持良好的性能 .为此 ,提出了一种根据话务量变化自适应调整动静信道比例的HCA方案 ,该方案能够在各种话务量负荷下均保持良好的阻塞率性能 .在话务量统计均匀分布的情况下 ,对此方案进行了系统仿真 ,结果表明该方案比固定动静信道比例的HCA方案具有更好的话务量跟随能力和阻塞率性能 .The impacts of the fixed-to-dynamic channel number ratio on the call blocking probability in hybrid channel assignment (HCA) are investigated. The analysis shows that HCA scheme with different fixed-to-dynamic channel number ratio could present best performance under different load of traffic. A novel HCA scheme is proposed, which adjusts the fixed-to-dynamic channel number ratio according to traffic density and always presents best performance despite the varying of traffic. Simulations are carried out for a system with uniform traffic distribution, and the results show that the new scheme out-performs the conventional HCA in terms of traffic load adaptation and call blocking probability.

关 键 词：混合信道分配 蜂窝系统 移动通信 动静信道比 阻塞率 无线频谱 话务量 

分 类 号：TN929.53[电子电信—通信与信息系统]