一种基于路由信息能量有效的无线传感器网MAC协议

传感器节点沿树状多跳路径逐级向Sink转发数据是无线传感器网络的主要业务模式之一。针对此类业务，该文的EBRI-MAC(Energy-efficient MAC protocol Based on Routing Information)协议提出一种对应树状路由转发关系，由父节点与子节点构成虚拟群的思想；并设计了连锁邀请与CSMA/CA结合的信道接入机制以及基于虚拟群同步的周期休眠机制，以达到节能的目的。结合节点能耗因素，定义了能量有效性的性能参数，并对EBRI-MAC的能量有效性进行理论分析。通过ns-2仿真结果表明网络业务时间相关性较强时，EBRI-MAC的能量有效性优于IEEE802.11DCF和S-MAC。

An Energy-Efficient MAC Protocol Based on Routing Information for Wireless Sensor Networks

In wireless sensor networks, one of the most significant traffic pattern is data gathering from sensor nodes to sink through multi-hop data-delivery tree. For such pattern, this paper presents EBRI-MAC(Energy-efficient MAC protocol Based on Routing Information), in which the idea of a parent node and its child nodes forming a virtual cluster based on the data-delivery tree is introduced, and a medium access mechanism of a chain-invitation combined CSMA/CA and a period sleep mechanism of synchronization within each virtual cluster are designed in order to save energy. Considering the major sources of energy waste, a performance parameter is defined to evaluate energy-efficient, and theoretical analysis is performed. With ns-2 simulation results,it is verified that EBRI-MAC can win better energy-efficient performance than IEEE802.11 DCF and S-MAC under the traffic pattern of each node being time-correlated.