Adaptive Technic for the Network Lifetime of Mantes through Cooperative MAC Protocol Design

Abstract

Wireless sensor networks (WSNs)consist of sensor node with sensing and communication capabilities. The important problem of applications of WSNs are Energy conservation and increasing throughput. Cooperative Communication(CC), which utilizes nearby terminals to relay the overhearing information to achieve the diversitygains, has a great potential to improve the transmitting efficiency in wireless networks. In this paper, a novel cross-layer Distributed Energy-adaptive Location-based CMAC protocol has been proposed,namely DEL-CMAC, for Mobile Ad-hoc NETworks (MANETs). The design objective of DEL-CMAC is to improve the performance of theMANETs in terms of network lifetime and energy efficiency. A practical energy consumption model is represented in this paper, which takes the energy consumption on both transceiver circuitry and transmit amplifier into account. A distributed utility-based best relay selectionstrategy is incorporated, which selects the best relay based on location information and residual energy. Furthermore, an innovative network allocation vector setting is provided to deal with the varying transmitting power ofthe source and relay terminals. We show that the proposed DEL-CMAC significantly prolongs the network lifetime under variouscircumstances even for high circuitry energy consumption cases by comprehensive simulation study.