分层移动IPv6中一种链路层辅助的端到端QoS保证方案

提出了一种新的在移动IPv6中提供服务质量保证的方案L2AMQ.L2AMQ结合分层移动管理与链路层辅助切换机理,通过检测链路层信号强度在移动节点即将进入的子网中建立提前预留.以加快QoS路径的切换速度.当移动节点在各子网间切换时,L2 AMQ通过建立提前预留和最小化数据包传输路径的变化来减少QoS路径的切换延迟.L2 AMQ还通过引入一个新的QoS对象,避免在分层移动管理中使用RSVP隧道,从而减小系统的额外开销,节约系统资源.仿真和分析表明,与现有协议相比,L2AMQ具有较低的预留阻塞率和切换掉线率,能较好地满足无线移动环境中实时业务的QoS需求.

Link Layer Assisted End-to-end QoS Guarantee Scheme in Hierarchical Mobile IPv6

A new QoS guarantee scheme,called L2AMQ,which provides QoS support in mobile IPv6 was proposed.L2AMQ combines hierarchical mobility management with link layer assisted handoff mechanism,establishes resource reservation in advance in the subnet which the MN will visit next by detecting link layer signal strength,to speed up the handoff process.When MN moves among subnets,L2AMQ reduces the QoS path handoff delay by minimizing the path variation and establishing resource reservation in advance.By introducing a new QoS object,L2AMQ can avoid using RSVP tunnel in hierarchical mobility management,consequently,and it reduces system overheads and saves system resources.Simulations and analyses show that L2AMQ outperforms existing protocols in terms of reservation blocking rates and session loss rates,and it can meet the QoS requirements of real-time services in wireless environment.