一种基于跨层优化的低延迟无线传感器网络MAC协议  

A low-delay MAC protocol based on cross-layer optimization for wireless sensor networks

作　　者：王罗[1] 李云[1] 刘占军[1] 赵为粮[1] 

机构地区：[1]重庆邮电大学光互联网及无线信息网络研究中心,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2007年第5期622-626,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：重庆市教委科学技术研究项目(KJ070521);重庆市科委项目(CSTC;2006BB2370)

摘　　要：S-MAC是无线传感器网络MAC协议中比较具有代表性的一种协议,针对S-MAC协议的周期性侦听和休眠机制造成网络中业务延迟较大的缺点,提出了一种基于跨层优化的低延迟无线传感器网络MAC协议(CAL-MAC)。CAL-MAC协议在S-MAC基础上,采用了具有跨层优化思想的自适应侦听机制。该自适应侦听机制中,节点根据路径信息来决定是否进行自适应侦听。通过数值分析,CAL-MAC在保证能量有效性的同时降低了延迟。S-MAC is a representative MAC protocol for wireless sensor network. The protocol adopts the periodic listening and sleeping mechanism but induces large delay in the network. To solve this problem, CAL-MAC that is a low-delay MAC protocol for wireless sensor network is proposed. CAL-MAC adopts coordinated adaptive listening mechanism based on cross layer optimization within the framework of S-MAC. In the mechanism, wireless sensor nodes perform coordinated adaptive listening depending on the routing information. Numerical analysis shows that CAL MAC can reduce the delay and guarantee the energy efficiency.

关 键 词：跨层优化 低延迟 自适应侦听 无线传感器网络 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]