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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,L2AMQ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。L2AMQ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。
A new scheme L2AMQ to provide QoS guarantee in Mobile IPv6 is proposed. L2AMQ combines layered mobility management and link layer assistance switching mechanism to establish advance reservation in the incoming subnet of mobile node by detecting the signal strength of link layer to speed up the switching of QoS path. When the mobile node switches between subnets, L2AMQ reduces the switching delay of the QoS path by establishing advance reservation and minimizing changes in the data packet transmission path. L2AMQ also avoids the use of RSVP tunneling in hierarchical mobility management by introducing a new QoS object, reducing system overhead and conserving system resources. Simulation and analysis show that, compared with the existing protocols, L2AMQ has a lower reservation blocking rate and dropped handover rate, which can better meet the QoS requirements of real-time services in the wireless mobile environment.