一种基于转发优先及流量分级的无线传感器网络退避算法

Novel backoff algorithm for WSN based on preferentially transmitting and different traffic levels

基于无线传感器网络的特点,提出了一种新的基于转发优先和流量分级的退避算法,该算法根据节点自身可获取的网络信息将网络流量判定为不同的级别,并依此改变退避窗口的大小;该算法还赋予转发节点一定的信道竞争优势,使得当前的通信业务可以优先地进行下去。通过理论分析和仿真实验,证实该算法能够有效地降低节点冲突率和额外的能量开销,减少传输延时,提高系统吞吐量,从而提高无线传感器网络的性能。

According to the specialty of WSNs,this paper proposed a new backoff algorithm based on preferentially transmitting and different traffic levels.This scheme defined different traffic levels according to the available messages that nodes could obtain,and adjusted the backoff window;the scheme also gave a priority to the transmitting nodes,which let the current transaction can be preferentially processed.Simulations prove that the proposed algorithm can reduce the collisions effectively,depress the extra energy consumption,achieve a lower latency,and heighten the system throughputs,provides a better performance of WSNs.