Research On Multi-hop Wireless Body Area Network Networking Method And Lightweight Energy-saving Algorithm

With the continuous improvement of living conditions and medical level,the development of communication technology and medical technology has attracted more and more attention.Wireless Body Area Networks(WBAN)is an important part of the new medical information system derived in recent years.However,there are still some problems in wireless body area network,such as limited communication distance,short life cycle of communication network and large energy consumption of network nodes.ZigBee technology,as a branch of a wireless sensor network,provides an effective solution for the implementation of WBAN.Through research and analysis,there are still the following problems in the research of lightweight energy-saving algorithm based on ZigBee: 1)In the process of single-hop transmission of ZigBee,the communication distance of single-hop network is limited;2)ZigBee network node uses battery power supply mode,the node life cycle is short and energy consumption is large.Aiming at the above problems,this paper carries out the following main research contents:(1)To solve the problem of short lifetime and high energy consumption of wireless body area network,an adaptive cubic exponential smoothing algorithm based on penalty error matrix is proposed.A lightweight prediction model is established at the sensing node and the routing node.The lightweight prediction model can effectively reduce the number of times that the sensing node and the routing node open the transceiver and save a lot of energy for ZigBee network.(2)To solve the problem of short lifetime and high energy consumption in wireless body area network,an adaptive transmission power correction control algorithm with adjusting factor is proposed.Because of the swing of the human body itself,the distance between the routing node and the coordinator node changes in real time,so the fixed transmission power will cause energy waste.The algorithm adaptively changes the energy transmitted by the routing node to the coordinator node.Through the above two schemes,the problem of high energy consumption in wireless body area network is solved.(3)Design and implement a multi-channel physiological information monitoring system based on ZigBee network.The ZigBee terminal node collects human physiological signals and sends them to the ZigBee routing node.Then the ZigBee routing node forwards the data to the ZigBee coordinator node.Finally,the ZigBee coordinator node sends the data to the upper computer software through serial communication.The upper computer software displays human physiological signals in real time,and realizes mass storage and real-time display of physiological data.