一种基于路由信息能量有效的无线传感器网MAC协议
doi: 10.3724/SP.J.1146.2006.00949
An Energy-Efficient MAC Protocol Based on Routing Information for Wireless Sensor Networks
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摘要: 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。Abstract: 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.
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