中文摘要：

移动IPv6是实现下一代互联网移动特性的核心技术,依赖于部署在家乡链路的家乡代理（HA）实现节点移动过程中的可寻址性.家乡链路的单一HA部署,将成为系统的单点故障隐患及性能瓶颈,难以保证系统服务可用性.为提升移动IPv6网络的系统服务可用性和系统性能,需要在家乡链路部署多HA,解决其单点故障问题,并有效均衡多家乡代理间的负载.文中研究移动IPv6网络多家乡代理部署方法,引入检测备份环对多HA间进行有效组织,基于此实现HA容错和负载均衡.多家乡代理采用单一HA映像以实现容错及负载均衡处理对移动节点的透明性,减小处理延迟和开销.

英文摘要：

Mobile IPv6（MIPv6）is the core technology to achieve seamless mobility of Next Generation Network（NGN）.In MIPv6,Home Agent（HA）is the key entity to enable Mobile Node＇s（MN）reachability.Single HA in the home link will be the performance bottleneck,and it is hard to ensure the system service availability.In order to enhance service availability and improve system performance,it is necessary to configure multiple HAs in the home link.The major potential deployment issues of multiple HAs are fault-tolerance and load balancing.This paper proposes a Multiple HA Deployment Scheme（MHADS）comprising the fault-tolerant mechanism and the dynamic load balancing mechanism.MHADS introduces Detection Backup Ring to realize fleet failure detection and service recovery of failed HA.MHADS utilizes single HA mirror image to achieve the transparency of fault-tolerance and load balancing to MN,which can efficiently reduce the latency and the cost.