面向无线传感器网络不同业务的区分服务算法

Differentiated services mechanism for various traffic transmissions in wireless sensor networks

针对无线传感器网络中不同等级业务在传输过程中对QoS的不同要求,提出了一种适合无线传感器网络中不同业务的区分服务算法——EMHNS算法。该算法根据不同等级的业务来选择合适的转发节点,从而保证实时业务传输的时延能够达到最小,而尽力而为业务传输时时延不是考虑的主要因素,在传输尽力而为业务的时候重点考虑网络能耗均衡。仿真结果表明,与定向扩散协议相比,该算法能降低实时业务的端对端延时,并使网络生存期得到提高。

Aiming at the different QoS requirements for various traffic transmission level in wireless sensor networks,a differentiated services algorithm for various traffic transmission has been introduced--EMHNS.The algorithm chooses appropriate forwarding nodes based on various traffic transmission levels.So it can achieve the minimum time delay for real-time traffic transmission.The influence of delay is not the primary factor for best-effort traffic transmissions,the network energy load balance should be taken into account heavily when the best-effort traffic transmits.The simulation results indicate that this algorithm can achieve lower time delay for real-time traffic than Directed Diffusion （DD） algorithm,and extend the lifetime of the network.