Research On Low Power Scheduling For WSN

A large number of nodes were randomly distributes in wireless sensor networks,and the nodes carry out autonomous monitoring of the sensing area.As the sensor node from the battery-powered,generally do not have the ability to obtain energy,so the node energy resources are limited,it is necessary to take more energy-saving measures to the network.At present,the main program at home and abroad is to take appropriate low-power network protocol,optimize the network load,making the same hardware equipment,the overall network power consumption lower.This paper mainly studies the latter.In order to reduce the power consumption of wireless sensor networks and enhance the network survivability,this paper proposes a low power scheduling scheme based on LEACH protocol in different scenarios.In this paper,we propose an optimal clustering and quadratic cluster election strategy based on node residual energy and geographic information: LEACH-G.In the LEACH-G protocol,the residual energy,network energy and node geography of the node are taken into account,and the cluster distribution is optimized to make the network cluster more reasonable.At the same time,the node energy,the node coverage redundancy and other factors,the cluster head for the second election,so that the cluster energy balance,cluster nodes work more stable.Finally,the LEACH-G protocol is simulated and compared with LEACH and other protocols.The results show that the improved strategy is 20% lower than the LEACH protocol energy consumption.Due to the large deployment density of the nodes in the network,there may be duplicate coverage and similar data transmission in the sensing area.So let a part of the redundant coverage of the higher nodes into the dormant state,to improve data transmission efficiency,save network energy,strengthen the network survivability is very helpful.In this paper,we study the hibernation strategy of LEACH protocol,and propose the improvement strategy of hibernation scheduling based on region coverage: LEACH-S.The improved content is mainly reflected in the factors such as the residual energy of nodes and the redundancy of node coverage.The above factors are used to screen the nodes The The simulation results show that the LEACH-S protocol can improve the data transmission efficiency,balance the energy consumption of the network and save the energy of the node.The simulation results show that the LEACH-S protocol can improve the data transmission efficiency,balance the energy consumption of the network,save the node energy,Delay the network die time has a better performance.The LEACH-S protocol has the same energy run time longer than the LEACH protocol by 24%.This paper proposes a sleep scheduling strategy based on point coverage: LEACH-SS.The LEACH-SS protocol is also improved on the basis of the LEACH protocol sleep strategy,and the redundant calculation method of the node's coverage of the sensing area is proposed,and the node state is judged by the redundancy.The simulation results show that the improved strategy can improve the efficiency of data transmission,and the running time of LEACH protocol network is longer than 30% in different scenarios,compared with LEACH protocol.