PoC中发言权控制机制的分布式改进  

Decentralized improvement on floor control mechanism for PoC

作　　者：刘海鹏[1,2] 廖建新[1,2] 朱晓民[1,2] 

机构地区：[1]北京邮电大学网络与交换技术国家重点实验室,北京100876 [2]东信北邮信息技术有限公司,北京100191

出　　处：《通信学报》2012年第4期42-46,共5页Journal on Communications

基　　金：国家杰出青年科学基金资助项目(60525110);国家重点基础研究发展计划("973"计划)基金资助项目(2007CB307100;2007CB307103);国家自然科学基金资助项目(61072057;60902051);中央高校基本科研业务费专项资金资助项目(BUPT2009RC0505);国家科技重大专项基金资助项目(2011ZX03002-001-01;2011ZX03002-002-01)~~

摘　　要：TBCP(talk burst control protocol)是OMA(open mobile alliance)为PoC(push to talk over cellular)系统定义的集中式发言权控制机制,具有单点控制瓶颈等固有缺陷。而在现有的分布式发言权控制机制中,并没有一种机制能够很好地被应用于PoC系统。对TBCP进行了改进并提出了2种分布式发言权控制机制:TBCP/DQ(distributed queue)和TBCP/MQ(mobile queue)。通过分析和仿真,验证了2种新机制能够很好地满足PoC业务的需求,甚至可以推广到所有CMA(collaborative multimedia applications)业务当中。TBCP（talk burst control protocol） has been defined as the floor control mechanism for PoC（push to talk over cellular） service by OMA（open mobile alliance）.It is a centralized controlling mechanism which has several limitations as other central approaches have,such as bottleneck effect,bad scalability,high maintenance cost of the central node,etc.In order to overcome the deficiencies of TBCP,two novel distributed floor control mechanisms were put forward,TBCP/DQ（distributed queue） and TBCP/MQ（mobile queue）.After analytical and experimental evaluations,the new ap-proaches serve well for PoC and even all CMA（collaborative multimedia application） services.

关 键 词：CMA POC 发言权控制 分布式控制 

分 类 号：TN915.09[电子电信—通信与信息系统]