In wireless sensor network, medium access control (MAC) protocol is important to effective communication. According to the requirement of network lifetime and energy consumption, taking account of the drawbacks in latency and efficient,we propose a cross layer-based MAC protocol. It uses the interactions among MAC, Routing and Physical layers, and realizes multi-hop data transmission in a listen / sleep cycle by utilizing the interactions among MAC, reduces multi-hop delay of the data delivery and takes the redundancy under control after weighing the energy-consumption to reduce energy consumption of redundant nodes for wireless sensor networks. The analysis and simulation show that the improved energy-efficient MAC protocol can improve channel utility, reduce latency and energy consumption.%在无线传感器网络中，媒体访问控制（MAC）层协议影响着整个网络的性能。根据无线传感器网络对节点能耗和时延的要求，本文提出了一种基于跨层设计的节能MAC协议。利用物理层、MAC层和路由层之间的信息交互，在保证可靠通信的基础上，实现在一个监听／睡眠周期内数据多跳传输，缩短数据传输时延，并且有效控制网络数据传输的冗余度，降低冗余节点能量消耗。性能分析和仿真结果表明，节能MAC协议能够有效地降低网络时延并且减少节点能耗。
展开▼
