一种基于F-HMIPv6的混合无缝切换算法  

A hybrid seamless handover algorithm based on F-HMIPv6

作　　者：陆绍飞[1] 周泽辉[1,2] 秦拯[1] 

机构地区：[1]湖南大学信息科学与工程学院,湖南长沙410082 [2]长沙职业技术学院,湖南长沙410300

出　　处：《中南大学学报（自然科学版）》2015年第9期3309-3316,共8页Journal of Central South University:Science and Technology

基　　金：中央高校基本科研业务费专项资金资助项目(531107040201);国家自然科学基金资助项目(61472131;61272546)~~

摘　　要：切换性能是影响移动Wi MAX服务质量的关键因素之一。提出一种混合无缝切换算法(hybrid seamless handover,HSH)。研究结果表明:HSH在F-HMIPv6算法的基础上集成MSCTP协议进行子网间快速切换,有效地消除数据分组的隧道传输及HA绑定更新过程所引起的服务中断;采用快速重复地址检测(F-DAD)机制可减少DAD产生的服务中断时间;在基站中设计业务调度缓存机制减少了子网间切换时因快速机制引起的丢包;结合CIP协议实现子网内链路变换的软切换方式,有效降低了服务中断时间和丢包率;与F-HMIPv6相比,HSH的子网间切换延迟降低近30%,子网内切换时的丢包数减少近60%。The handover performance is one of the key factors affecting the quality of services in mobile Wi MAX networks. A hybrid seamless handover scheme named hybrid seamless handover（HSH） was proposed. HSH used MSCTP protocol based on F-HMIPv6 to implement fast handover between subnets, which effectively eliminates the service disruptions during tunnel transmission and HA binding update processing. F-DAD mechanism could be used to reduce the service disruption time caused by DAD. Service scheduling and caching mechanism was designed in base stations to reduce the packet loss caused by the fast handover mechanism between subnet. In addition, Semisoft Handoff in CIP was used for handover within a subnet to reduce handover latency and packet loss. The results show that the proposed scheme（HSH） outperforms F-HMIPv6 in terms of handover latency and packet loss. Compared with the F-HMIPv6, the handover latency between subnets and the handover packet loss within a subnet in HSH are reduced by nearly 30% and 60% respectively.

关 键 词：移动Wi MAX 混合无缝切换 快速重复地址检测 缓存机制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]