Research On WWSN Routing Repair Algorithm For Post-disaster Rescue

In recent ten years,with the frequent occurrence of natural disasters and man-made accidents all over the world,the life and safety of rescue workers have become the concern of major security organizations in the world.After a disaster,the rescue workers will face various uncertain factors and dangers when they arrive at the disaster stricken areas and go deep into various dangerous areas for rescue work.The communication equipment they wear may lose contact due to the complexity and variability of the disaster relief scene,or even the damage of sensor equipment,and may face the secondary injury of the disaster at any time.Therefore,in the process of disaster relief,sensor equipment not only needs to complete the function of monitoring human indicators,but also needs to maintain a good connection state,so that all departments can share information and coordinate work.Nowadays,some scholars have studied the routing recovery mechanism of wearable wireless sensor networks,and put forward many new schemes to improve the routing quality.However,these researches seldom consider the special post disaster scenarios.There are too many uncertain factors in this environment for wearable wireless sensor networks to apply these algorithms.Therefore,it is necessary to study the routing repair algorithm for disaster relief scenarios.This paper studies the routing repair algorithm of WWSN for post disaster rescue,and mainly studies the communication between bodies.Firstly,an energy consumption balanced self repairing clustering routing algorithm for non uniformly deployed nodes is proposed Nodes(EBCN)is used to select cluster head nodes by judging the residual energy,node degree and average communication distance of nodes.After the current node breaks communication with its cluster due to its own movement,it uses the backup link to join the surrounding cluster nearby,and introduces the join cost formula to make the network energy consumption more balanced.For inter body link failure,this paper proposes a link fault repair algorithm based on polygon Fermat point(LFRA),which can repair the faulty link by inserting relay nodes.Secondly,the energy consumption of the nodes involved in the repair process is considered,and the nodes that do not meet the energy requirements are eliminated to avoid multiple repair due to insufficient energy.Simulation results show that,compared with other repair algorithms,the proposed repair algorithms have a longer lifetime and more balanced energy consumption.