Guaranteeing the network lifetime in wireless sensor networks: A MAC layer approach

摘要: Energy is the most crucial but scarce resource in wireless sensor networks (WSNs). A wealth of MAC protocols are proposed only to prolong network lifetime for energy-efficiency; whereas, others tailored reduce end-to-end latency addition extending lifetime. Since requirements depend on applications network, it would be difficult design a single that satisfies wide range applications. Specifically, some WSNs required survive certain because too expensive deployment cost (e.g., harsh or hostile environments) replace energy-depleted nodes. Furthermore, portion surviving nodes can critical factor satisfy quality surveillance (QoSv) requirements. In this paper, we propose new adaptive (A-MAC) protocol not guarantees pre-configured also reduces latency. Basically, each node adapts its duty cycle depending traffic load suffers. By doing so, energy consumption rate approaches ideal rate, which enables Also, if suffers relatively less load, sleep delay by increasing cycle. Analysis and simulation results exhibit shows than S-MAC [W. Ye, J. Heidemann, D. Estrin, Medium access control with coordinated sleeping networks, in: IEEE/ACM Transactions Networking, vol. 12, No. 3, June 2004.] while meeting