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比较和分析了无线传感器网络节点物理层设计的各种无线通信技术、现有的成熟标准、重要的射频参数以及不同的处理器方案,对节点物理层设计的各个主要方面进行了较为全面的研究.介绍了无线传感器网络节点的一种实现,给出了相关的测试数据以及一种“单处理器双工作频率”的新节能策略.分析了符合传感器网络MAC算法中节点周期性侦听要求的节点寿命估算问题.指出无线传感器网络节点物理层设计的关键考虑因素为:RF启动时间(决定MAC协议可以实现的最佳节点睡眠时间比例和最小的退避时间颗粒)、RF载波频率和调制方式(决定射频收发功耗)以及处理器工作在2个频率的片上系统的总体功耗.
Various wireless communication technologies, existing mature standards, important RF parameters and different processor schemes are compared and analyzed in the physical layer design of wireless sensor network nodes. All the major aspects of the node physical layer design are comprehensively studied This paper introduces an implementation of wireless sensor network nodes and gives the related test data and a new energy saving strategy of “single processor double working frequency.” In this paper, we analyze the requirements of periodic sensor listening in node MAC algorithm Node life estimation problem. It is pointed out that the key considerations for the physical layer design of wireless sensor network nodes are: RF start-up time (which determines the optimal node sleep time ratio and the minimum back-off time granularity that MAC protocol can achieve), RF carrier frequency and modulation mode Determine RF transceiver power consumption) and the total power consumption of the system-on-chip operating at 2 frequencies.