移动计算中2种呼叫接入控制优化策略的分析与比较  

Analysis and comparison of two optimized call admission control schemes in mobile computing environment

作　　者：黄国盛[1,2] 陈志刚[2] 陈炳权[3] 赵明[2] 颜琳[1] 

机构地区：[1]湖南第一师范学院信息科学与工程学院,湖南长沙410205 [2]中南大学信息科学与工程学院,湖南长沙410083 [3]吉首大学信息科学与工程学院,湖南吉首416000

出　　处：《中南大学学报（自然科学版）》2016年第5期1613-1618,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(61073186);湖南省自然科学基金资助项目(11JJ6061)~~

摘　　要：在介绍DT-CAC和RBDO-CAC这2种呼叫接入控制优化策略的基础上,通过NS-2工具对这2种策略在不同呼叫流量强度下的性能进行仿真测试,并与传统的NCB策略进行对比。研究结果表明：DT-CAC和RBDO-CAC优化策略的性能均比NCB方案的性能好,从整体上看,RBDO-CAC策略的切换呼叫掉线率和新呼叫阻塞率比DT-CAC的低,且其系统资源利用率比DT-CAC的高;在网络呼叫流量较高的情况下,RBDO-CAC策略资源利用率比DT-CAC策略高2%～5%。After two optimized call admission control schemes known as DT-CAC and RBDO-CAC were presented,the performances of these two schemes at different call traffic intensities were tested using NS-2, and compared with traditional NCB scheme. The results show that both DT-CAC and RBDO-CAC can achieve better performances than NCB. On the whole, when compared with DT-CAC, RBDO-CAC has lower handoff call dropping probability and new call blocking probability, and higher system resource utilization rate. The system resource utilization rate under high call traffic load of RBDO-CAC can be 2%-5% higher than DT-CAC.

关 键 词：无线移动通信 呼叫接入控制 马尔可夫模型 服务质量 

分 类 号：TN929.5[电子电信—通信与信息系统]