一种基于预约机制的WSN节能MAC协议

基于TDMA协议，提出了一种改进的R-TDMA协议。通过引入预约机制使WSN中的节点参与网络的数据传输。节点只有在发现感知的环境数据出现明显变化时才向簇头预约数据上传的时隙，进而进行数据上传；否则尽可能地处于休眠状态，从而达到节能目的。参照 Rockwell的 WIN模型对TDMA、E-TDMA和 R-TDMA的网络能耗进行仿真；结果表明，在 R-TDMA协议下，网络节点数量的增加并不会给能耗带来剧烈的变化，网络事件多少的变化对能耗的影响也很小。R-TDMA协议在节约能耗方面较TDMA和 E-TDMA有着明显改善。

Energy efficient MAC protocol for wireless sensor networks based on reservation mechanism

TDMA-based protocol called R-TDMA saves energy consumption of effectively by introducing reservation mechanism.Only if significant changes of environmental data have been detected did nodes apply to the cluster head for reservation,and then upload data;Otherwise nodes will in dormant state as much as possible,so as to save energy. Referring to Rockwell’s model WIN,energy consumptions of TDMA,E-TDMA and R-TDMA are simulated;results show that the increasing number of nodes or events in the network does not brings a dramatic changes of energy consumption.The performance of R-TDMA in energy saving,compared with TDMA and E-TDMA,is improved significantly.