无线传感器网络中基于PMAC的自适应冲突控制协议

A SELF-ADAPTIVE CONFLICT CONTROL PROTOCOL BASED ON PMAC IN WSN

针对无线传感器网络中的访问冲突会导致工作效率低、能耗增加及网络寿命降低的问题,提出一种基于模式媒介访问控制PMAC(Pattern Medium Access Control)的自适应冲突控制协议缓解冲突。竞争窗口的尺寸通过数据传输的条数SC值和控制参数α值进行优化,自适应网络的变化修改竞争窗口的计算参数,使得网络中的竞争冲突减少。在实际环境中实现了该协议,验证了该协议的有效性。实验结果表明,相比现有的SMAC、PMAC和IEEE802.11协议,该协议具有更好的缓解冲突能力,并且能够进一步节省能量从而延长网络寿命。

For the problem of access conflict in wireless sensor networks, which reduces efficiency, increases energy consumption and re- duces the life of the network, we proposed a PMAC-based self-adaptive conflict control protocol. The size of contention window is optimised by the number of data transmission SC and the value of control parameter α. The.changes in adaptive network modify the calculation parameters of contention window, which reduces the contentions and conflicts in network. We implemented the protocol in real environment, and verified the effectiveness of it. Experimental results showed that the proposed protocol had better ability to ease the conflict than existing protocols of SMAC, PMAC and IEEES02.11, and could further save energy and extend the life cycle of the network in turn.