异构无线网络中的SIP终端移动性研究  

Research on session initiation protocol terminal mobility of heterogeneous wireless networks

作　　者：卢正新[1] 史军[1] 刘雅莎[1] 王芙蓉[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2009年第11期65-68,72,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：湖北省科技攻关项目(2006AA102A04)

摘　　要：为改善传统SIP(会话初始化协议)移动架构下位置管理和实时业务的切换性能,提出了一种基于锚域的异构无线网络移动性管理方案.SIP终端通过内嵌的锚移客户端和移动锚点一起控制终端的移动(包括垂直切换).描述了异构无线网络中锚域内与锚域间切换过程,分析了影响切换性能的相关参量.仿真结果显示:在终端间通信距离相对增大和带宽相对较小的情况下,该方案对比传统SIP架构的切换延迟分别减少了约40%和25%.To improve the performance of location management and the handoff of real-time applications under traditional session initiation protocol（SIP） mobility architecture, a improved SIP mobility architecture based on anchor mobility proxy（AMP） was proposed. The mobility of the SIP terminal, including vertical handoff, was controlled by the inbuilt AMC （anchor mobile client） module and AMP. The procedures of inner field handoff and intra field handoff in the heterogeneous wireless net-works were described, and the parameters relevant to the handoff performance were analyzed in detail. Simulations show that the architecture based on AMP can alleviate the transmission delay of the SIP signaling messages to about 40% when the distance between terminals is relatively large and 25% when the bandwidth between terminals relatively narrow.

关 键 词：无线异构网络 会话初始化协议 终端移动性 移动性管理 快速切换 软切换 

分 类 号：TN919.81[电子电信—通信与信息系统]