摘要
该文研究了IMS(IP Multimedia Subsystem)中的呼叫建立流程,以确定可以优化的信令流量,研究结果显示:S-CSCF(Serving Call Session Control Function)是IMS中的瓶颈点。为了降低会话建立时延,提高系统性能,提出了一种基于组的业务触发算法(Group based Service Triggering Algorithm,GSTA),然后对现有3GPP(3rd Generation Partnership Project)提出的业务触发算法(3GPP STA,3GPP Service Triggering Algorithm)和GSTA进行了性能建模,理论分析和仿真结果表明GSTA可以有效地降低S-CSCF的信令流量,增加了整个系统的吞吐量,同时显著减少了会话建立时延,提高了IMS网络的服务质量。
To determine the potential signaling traffic reductions, the session establishment procedures in IMS (IP Multimedia Subsystem) are investigated. The investigation showes that, the S-CSCF (Serving Call Session Control Function) is the major bottleneck in IMS network. To reduce the session setup delay and improve the system performance, a new Croup based Service Triggering Algorithm (GSTA) is proposed. And then the modeling of 3GPP (3rd Generation Partnership Project) Service Triggering Algorithm (3GPP STA) and GSTA are presented. Theoretical analysis and simulation results show that, GSTA efficiently reduces the signaling traffic load at the S-CSCF, increases the throughput of the system and significantly reduces the session setup delay, improves IMS network quality of service.
出处
《电子与信息学报》
EI
CSCD
北大核心
2008年第11期2596-2600,共5页
Journal of Electronics & Information Technology
基金
国家杰出青年科学基金(60525110)
国家973计划项目(2007CB307100
2007CB307103)
新世纪优秀人才支持计划(NCET-04-0111)
电子信息产业发展基金项目(基于3G的移动业务应用系统)
国家高技术产业化信息化装备专项项目(支持数据增值业务的移动智能网系统)资助课题
关键词
无线通信
信令性能
会话建立时延
过滤准则
业务触发算法
SIP
IP多媒体子系统
Wireless communication
Signaling performance
Session setup delay
Filter criteria
Service triggering algorithm
SIP (Session Initiation Protocol)
IMS (IP Multimedia Subsystem)