移动IP切换时资源分配动态策略生成机制研究

Research on generation mechanism to dynamic policy of resources allocation for mobile IP handoff

针对多媒体业务在切换后无法立即获得有保证服务的问题,提出一种移动IP切换时资源管理的动态策略模型,并着重设计模型中动态策略的生成机制。该机制根据移动节点相关预测信息自动生成动态策略,在切换前作准入控制和资源准备。当接入域资源不足时,采用“退却”算法,在保证业务可靠性前提下按优先级灵活调整各业务的资源占有量。分析和仿真表明,该机制能保证较高优先级业务的QoS,提高切换成功率,相对于传统方法更灵活。

Addressing the problem of the multimedia applications could not obtain assuring service immediately after handoff, which proposed a dynamic policy scheme of resource management for mobile IP handoff, and stressed the design of the dynamic policy generation mechanism. On the basis of the prediction information of the mobile node, the mechanism produced dynamic policies automatically to do admission control and prepared resources for handoff before it happened. When the resources of access domain could not afford mobile nodes＇ requisition, it adopted step back arithmetic to adjust agilely resource possession according to the priority with assuring the business credibility. By analysis and simulations, it is shown to ensure the QoS of applications with higher priority and improve the success rate of handoff, and then the management mode is more flexible than traditional methods.