基于优先级的WMSN区分服务路由算法

提出一种基于区分服务(Diffserv)的QoS路由算法。该算法利用两种方式保证传输的QoS需求:一是在转发数据包时,以不同的概率公式选择路径;二是使用强占性优先排队模型处理节点缓存中不同类型的数据包。仿真实验显示,该路由算法能保证不同种类数据包的QoS需求,平衡网络的能量消耗,同时延长网络的生存周期。

WMSN DiffServ Routing Algorithm Based on Priority

A quality of service (QoS) routing optimization algorithm based on differentiated services (DiffServ) is proposed. This algorithm improves QoS guarantees of wireless multimedia sensor network (WMSN) in two ways: selecting path through different probabilities when transmitting different kinds of packages, at the same time, adopting a preemptive priority queuing model for the packages in the sensor nodes. In simulation, we compared the method with SAR algorithm in various ways, including supporting capacity of network scale, transmission delay of data packages, energy efficiency and network life. Experimental results show that as far as above-mentioned indexes, the algorithm is superior to the SAR algorithm and the algorithm can guarantee QoS requirement of various data packages with different types.