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低能耗/高可靠通信问题是传感器网络应用中的一个重要研究课题,即如何在满足应用所设定的端到端可靠性要求的前提下实现能耗最小化,在物理层引入功率控制的策略,逐渐增加发送功率,直至满足可靠要求,从而降低不必要的能耗;在数据链路层提出了一种能量高效的组确认数据重传机制,尽量降低数据重传过程中冗余信息.并在此基础上,提出一种跨层联合优化算法,以解决低能耗/高可靠通信问题.最后通过NS-2仿真实验证明了该算法能够满足传感器网络低能耗/高可靠的应用需要。
Low-energy / high-reliability communication is an important research topic in the sensor network application. How to achieve the energy consumption minimization under the premise of meeting the end-to-end reliability requirements set by the application, the strategy of introducing power control at the physical layer , Gradually increase the transmit power until reliable requirements are met, thus reducing unnecessary energy consumption. At the data link layer, an energy-efficient group acknowledgment data retransmission mechanism is proposed to minimize the redundant information in the data retransmission process. On this basis, a cross-layer joint optimization algorithm is proposed to solve the problem of low energy consumption / high reliability communication.Finally NS-2 simulation results show that the proposed algorithm can meet the low energy consumption / high reliability application needs of sensor networks.