Research On Node Scheduling And Routing Technology In Wireless Sensor Networks

As one of the frontier technologies in the field of computer and Internet research,wireless sensor network technology has gradually penetrated into various fields of human scientific and Technological Development and social life,and is likely to develop into a new high-tech market.The key technology of wireless relay network is an important part of wireless sensor network research,which usually determines important evaluation indicators such as network communication efficiency and energy efficiency.Therefore,this thesis proposes a DCAS algorithm for node-differentiated management for wireless multi-hop heterogeneous networks,a novel topology control and sleep-awake schedule for strip-based wireless sensor networks,a MAC layer node scheduling method based on beacon frame synchronization and communication asynchronous,and a data retransmission mechanism for low data volume wireless networks.1)Aiming at the different demands of each node in multi-hop heterogeneous wireless Mesh network on communication data volume,communication delay and communication energy consumption,this paper proposes a node scheduling algorithm in multi-hop heterogeneous network.According to the requirements of location information,data volume and reporting frequency of nodes,the node can dynamically allocate work cycle to ensure the node.On the premise of satisfying its own communication needs,it reduces the energy consumption of nodes in channel interception,sending and receiving management frames,and supports the dynamic routing mechanism of nodes in the network,so as to optimize the energy consumption ratio of nodes in receiving and receiving data and managing frames,and prolong the lifetime of the network.2)In order to solve the problems of node clustering and cluster head selection in wireless band sensor networks which are difficult to achieve load balancing and delay stabilization,a topology control algorithm and its wake-up mechanism in wireless band sensor networks are proposed.This mechanism aims at optimizing the overall network lifetime,total data rate and system delay,and resolves the common problems in band networks.For the connectivity problem,cluster head election algorithm is designed to achieve load balancing,improve the transmission rate of the system and reduce the average transmission delay of messages.The proposed algorithm is based on fixed clustering and adopts cyclic migration scheduling and load balancing mechanism.On the premise of guaranteeing low communication delay,the MAC layer improves the interception/sleep ratio,reduces the probability of idle interception and collision retransmit,and further reduces the pass-through by controlling the variance of average communication distance and cluster head distance within the cluster.The energy consumption of the information can prolong the network life and ensure the integrity of the detection range in the later period of the network.3)Aiming at the problems of large energy consumption and low utilization of data slot when existing synchronization-based wireless sensor network protocols are applied in intelligent meter reading scenarios,an adaptive MAC layer node scheduling mechanism is proposed,which combines beacon synchronization with asynchronous communication to reduce energy consumption of network management.And reduce network conflicts.The analysis shows that the new MAC mechanism can prolong the network lifetime and improve the probability of communication success.