An Energy-Efficient Data Delivery Protocol for Multihop Wireless Sensor Networks
用于多跳无线传感器网络的能量有效数据转发协议

For increasing the life of wireless sensor networks,each node must conserve energy as much as possible.To reduce the energy consumption significantly,a node should turn off its radio most of the time,except when it has to participate in data forwarding.In this paper,we proposed a novel geographic forwarding protocol for reliable and energy-efficient data delivery(REEGF)in large-scale wireless sensor networks,in which the saving energy and reliable date delivery are ensured by using both listening periodically of the wakeup radio and synchronization awakening of the main radio in the node.The hidden and exposed terminal problems are solved by using both RTS/CTS-based message exchange and busy tones,and the optimal relaying node via contention among receivers are selected,which is based on the geographical location of the nodes involved,and the resources of the node are saved due to integrating routing,Medium Access Control(MAC),and topology management into a single layer.It is shown that the proposed protocol is more reliable and energy-efficient than the existing geographic random forwarding protocol(GeRaF),and its latency is smaller in moderate node density environment.