基于测量的WMSNs跨层QoS机制

Measurement-Based WMSNs Cross-Layer QoS Mechanism

针对无线多媒体传感器网络(WMSNs)的QoS管理问题,提出了一种基于被动模式测量的QoS路由机制。首先通过分布式的测量感知端到端QoS指标,其次通过断层分析获得逐跳链路的QoS状态;然后将上述测量结果反馈到网络层的QoS路由过程,将QoS评价结果作为启发条件,结合蚁群算法实现基于动态QoS感知的路由决策。仿真结果表明,该QoS路由机制的QoS明显优于现有的路由机制。

With the problem of QoS management for wireless multimedia sensor networks （WMSNs）, a measurement-based QoS route mechanism is suggested. First the end-to-end QoS metrics are obtained through distributed measurement, second the hop-by-hop link QoS dynamics are estimated with NT（network tomography） model, and then feed back to the network layer route algorithm. An improved ant colony algorithm （ACA） is employed and the QoS metrics act as the heuristic factor. Simulation results show that this mechanism outperforms traditional algorithms in terms of QoS rating.