组播群组竞争接入技术分析  

Sub multimedia broadcast multicast service group access technique

作　　者：钱峻[1] 王匡[1] 余燕平[1] 朱广信[1] 

机构地区：[1]浙江大学信息科学与工程学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2009年第4期610-614,共5页Journal of Zhejiang University：Engineering Science

基　　金：中国工程院地面数字广播专利资助项目(H20061084)

摘　　要：为减少信息非对称以及宽带组播业务下的资源消耗,提出以纳什(Nash)均衡下的沙普利值核仁共享为基础,初步构建移动多媒体宽带业务分布、独立组播竞争的接入设想.重点分析在恒定和二阶段、三阶段分级门限下满足泊松分布的组播群组无限潜在竞争接入性能.特别是业务承载成本、接入门限和用户随机到达分布等参数对多阶段分级门限的影响.最后分析了基于长期目标优化下,组播群组的竞争波动和参数关联匹配.基于长期目标的三阶段分级门限下组播群组的短期效用期望,虽然略劣于恒定接入门限时,但从长期来看,三阶段分级门限下的组播群组更具有优势.A sub multimedia broadcast multicast service （MBMS） group divided and independent access mechanism was preliminary established based on Shapley nucleolus＇s Nash competition model in order to relieve resource consumption and asymmetry conflict. Unlimited potential competitor＇s access mechanism was satisfied with Poisson distribution. The performance under constant and two, three grades access thresholds was analyzed, especially the access bearing cost, the access threshold and the random arrive distributing parameters. And the sub MBMS group＇s fluctuation and parameter＇s associated influence based on long-term objectives were particularly compared. The short term utility expectation of three access ladders threshold with long-term objectives is a little inferior to that of constant access ladders threshold, but it is superior to the others after a long time.

关 键 词：多媒体组播 接入 纳什 

分 类 号：TN929.5[电子电信—通信与信息系统]