untitled - 智能与网络化系统研究所.DOCVIP

Energy-Efficient Cross-Layer Protocol of Channel-Aware Geographic-Informed Forwarding in Wireless Sensor Networks 用于无线传感器网络中的具有通道意识和地理自动传感的节能跨层协议 Lili Zhang, Member, IEEE, and Yan Zhang, Member, IEEE Abstract—In the reported metrics of the existing literature, the realistic wireless channel situation is generally ignored in selecting the appropriate next-hop relay node during packet forwarding in wireless sensor networks (WSNs). In this paper, we propose a new energy-efficient local metric, which is called the efficient advance- ment metric (EAM), for sensor networks. EAM considers both the maximum forwarding distance and the packet’s successful trans- mission probability by taking into account the wireless channel condition. This will enable the forwarding node to choose the most energy-efficient relay node in the geographic-informed rout- ing protocol. Theoretically, we show the existence of the unique optimal relay node to maximize EAM over a typical Nakagami-m channel of a code-division multiple-access (CDMA)-based WSN. Furthermore, based on the proposed metric EAM, we present a cross-layer packet-forwarding protocol channel-aware geographic- informed forwarding (CAGIF) by optimally selecting the relay nodes. CAGIF only requires that nodes have the knowledge of their own location information and the location information of the source and destination nodes. Numerical examples are presented to show the characteristics of EAM and the optimal distance. Com- pared with the previous geographic packet-forwarding schemes in WSNs, CAGIF consumes much lower energy and generates a significantly decreased signal overhead. 摘要，在现有的文献报告里，无线信道的总体状态总是被忽视。无线传感器网络（WSNs）的信息包通讯时，选择适当的继电器中继节点。在本文中，我们提出了一种新的本地节能度量，即叫做有效推进尺度的(EAM)，用于传感器网络。EAM既考虑了这最大推进距离，也考虑了转发数据包的成功概率，还考虑到无线信道的状态。这将使转发节点成为可能，并在地理自动传感路由协议里选择最节能的中继节点。从理论上说，我们展示了特有的最佳中继节点，以最大限度地利用EAM算法。在一个典型的Nakagami-m通道里，码分多路存取（ CDMA ）数字无线技术的无线传感器网络。此外，根据被提议的度量EAM，我们提出了具有通道意识和地理自动传感(CAGIF)的跨层包转发协议书，选择选择中继节点。CAGIF只要求节点了解自己的位置信息和位置信息的来源和目