| This paper focus on the research of wireless sensor network(WSN)topology control technology in connectivity restoration. As the network is deployed in harsh environments where the nodes are susceptible to damage or sensors are out of energy, the network is divided into several small areas.Thus data collection is affected. How to fix the WSN connectivity between various regions is a difficulty in the practical application of WSN. The algorithm of connectivity restoration in this paper is divided to three phases:discovery of connectivity damage phase, preparation of nodes phase and mobility of nodes phase.First of all, n discovery of connectivity damage phase, this paper adopts measure that Sink node monitor the area of the sentinel nodes'heartbeat information to judge whether the network is divided into disjoint areas. Thus the algorithm is closer to the practical application of WSN.Secondly, as deployment of nodes in WSN is usually in random by planes,there are a large number of redundant nodes in a network. In this paper,redundant nodes are chosen to be candidate nodes to restore network connectivity. Also, energy balance is included considering the relative distance between nodes and node residual energy information, and adjust the weights of the energy of equilibrium in the repair link node. Thus it can avoid node connectivity damage again. Finally, the ideas of the collaboration in supply chain collaboration is used for reference. Take the transmission model of collaboration in WSN as an example, we analyze and determine the relative position of source node and relay node to attain more gains. In this way, connectivity has been restored and nodes'transmission coverage is expanded.Matlab simulation tool is used in this paper to verify the performance of the proposed algorithm. The simulation result shows that the proposed algorithm can extend communication range, and better energy balance of repair link node is obtained, which prolong the network life time. |
PDF Full Text Request