无线传感器网络中一种新型节能协同传输模式转换策略研究

An Energy-Efficient Mode Switch Scheme for Cooperative Transmission in Wireless Sensor Networks

本文针对无线传感器网络中基于簇的时分协作MIMO通信系统,提出一种最优化的组内、组间功率和时隙资源分配算法,在保证最大数据吞吐率的同时满足可靠性要求。并通过建立传输能耗模型,提出一种全新的基于路径损耗的传输模式切换策略。根据协同通信中协作节点和中继节点的几何位置,通信系统得以在SISO、协作式MISO、单跳、多跳等多种传输模式间转换。转换门限的选择算法在该策略中也一并提出,并可反向得出协作节点和中继节点的存在域。

This paper investigates a cluster-based time division cooperative MIMO communication system for WSNs. An optimum algorithm for the power and time resource allocation in intra-cluster and inter-cluster slot has been proposed. This algorithm is designed to achieve the maximum data throughput for one single-hop and at the same time remain within the tolerance of the outage probability requirement. By establishing a total energy equation model, a brand new path-loss based mode switch scheme is put forward then. Based on the geometry positions of the cooperative nodes and the relaying nodes, the transmission system can switch among SISO, cooperative MISO, single-hop, and multi-hop modes. The switching thresholds can be obtained from this scheme and in return used as the existing area to choose the proper cooperative nodes or relaying nodes.