A high stability routing mechanism for the dynamic wireless Ad-hoc network is designed. Firstly, the condition of link existing between the dynamic nodes and the condition that packets can successfully transport across the link are analyzed. Based on the above analysis, two key indicators of link duration and congestion probability factor, which guarantee the effectiveness of the link are proposed. Secondly, the method to calculate the link duration based on the current movement states of those nodes, and the method to calculate the congestion probability factor based on the queue length of the buffer are put forward. Then, combining the link duration and the congestion probability factor, an On-Demand Routing Protocol based on link Duration and Reliability (ODRP-DR) is proposed. Finally, simulations are conducted to evaluate the effectiveness of the routing mechanism in NS2. The results show that the proposed routing mechanism can effectively reduce the probability of packet loss and routing reconstruction.%该文旨在为拓扑动态变化的无线自组织网络设计一种稳定性路由机制.首先建模分析了动态变化网络中节点间通信路径存在的条件,以及数据包在该路径上可靠传输的条件,基于以上分析提出了保证路径有效的关键指标:链路持续时间、拥塞可能性因子.接下来提出基于节点当前运动情况计算链路持续时间,以及基于缓冲区队列长度与队列长度变化率计算节点拥塞可能性因子的算法.结合链路持续时间与节点拥塞可能性等信息,该文提出了一种面向路径可靠性及稳定性综合指标的按需路由机制(ODRP-DR),并利用NS2仿真平台对该机制性能进行分析,仿真结果表明,在网络拓扑结构动态变化的情况下能有效减小数据包丢包概率,路由重建次数.
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