To reduce the potential signaling traffic in IP multimedia subsystem （IMS）, the session establishment procedures were investigated. The serving call session eontrol function （S-CSCF） is the major bottleneck in IMS...To reduce the potential signaling traffic in IP multimedia subsystem （IMS）, the session establishment procedures were investigated. The serving call session eontrol function （S-CSCF） is the major bottleneck in IMS and the existing 3GPP service triggering algorithm （STA） based on initial filter eriteria （iFC） increases the end-to-end session setup delay remarkably. To reduce the session setup delay and improve the system performanee, a SIP response message based filter criteria （rFC） was proposed. Based on the rFC, a SIP response message based STA （RSTA） was further proposed. The modeling and theoretical analysis of 3GPP STA and RSTA were presented. Simulation results show that, compared with 3GPP STA, the RSTA can avoid the additional signaling traffie load of the S-CSCF and application server （AS） effectively, reduce the session setup delay eonsiderably, increase the throughput of the S-CSCF and improve the quality of service （QoS） of IMS network.展开更多
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...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。展开更多
分析了现有 IP 多媒体子系统(IMS)业务触发数据存在的问题,给出了一种业务键的实现方式,业务键的存在可以使多个应用服务器(AS)之间的初始过滤准则(iFC)互不干扰,从而不会因为新业务的部署而引发新旧业务之间的冲突。接着对第三代合作...分析了现有 IP 多媒体子系统(IMS)业务触发数据存在的问题,给出了一种业务键的实现方式,业务键的存在可以使多个应用服务器(AS)之间的初始过滤准则(iFC)互不干扰,从而不会因为新业务的部署而引发新旧业务之间的冲突。接着对第三代合作伙伴计划(3GPP)业务触发和基于业务键的业务触发进行了性能建模,理论分析和仿真结果表-明,通过增加业务键数据,可提高服务呼叫会话控制功能(S-CSCF)和 AS 的匹配效率,使S-CSCF 在一次业务触发中可以触发多个业务,从而简化业务触发流程。基于业务键的业务触发方式可以有效地提高业务触发效率,增加系统的吞吐量,降低会话建立时延,提高IMS 网络的服务质量(QoS)。展开更多
基金Supported by National Science Fund for Distinguished Young Scholars (No. 60525110)National Basic Research Program of China (No.2007CB307100, 2007CB307103)+1 种基金Program for New Century Excellent Talents in University (No. NCET-04-0111 )Development Fund Project for Electronic and Information Industry (Mobile Service and Application System Based on 3G)
文摘To reduce the potential signaling traffic in IP multimedia subsystem （IMS）, the session establishment procedures were investigated. The serving call session eontrol function （S-CSCF） is the major bottleneck in IMS and the existing 3GPP service triggering algorithm （STA） based on initial filter eriteria （iFC） increases the end-to-end session setup delay remarkably. To reduce the session setup delay and improve the system performanee, a SIP response message based filter criteria （rFC） was proposed. Based on the rFC, a SIP response message based STA （RSTA） was further proposed. The modeling and theoretical analysis of 3GPP STA and RSTA were presented. Simulation results show that, compared with 3GPP STA, the RSTA can avoid the additional signaling traffie load of the S-CSCF and application server （AS） effectively, reduce the session setup delay eonsiderably, increase the throughput of the S-CSCF and improve the quality of service （QoS） of IMS network.
文摘该文研究了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。
文摘分析了现有 IP 多媒体子系统(IMS)业务触发数据存在的问题,给出了一种业务键的实现方式,业务键的存在可以使多个应用服务器(AS)之间的初始过滤准则(iFC)互不干扰,从而不会因为新业务的部署而引发新旧业务之间的冲突。接着对第三代合作伙伴计划(3GPP)业务触发和基于业务键的业务触发进行了性能建模,理论分析和仿真结果表-明,通过增加业务键数据,可提高服务呼叫会话控制功能(S-CSCF)和 AS 的匹配效率,使S-CSCF 在一次业务触发中可以触发多个业务,从而简化业务触发流程。基于业务键的业务触发方式可以有效地提高业务触发效率,增加系统的吞吐量,降低会话建立时延,提高IMS 网络的服务质量(QoS)。
