Research On Simultaneous Transfer Of Energy And Information In Wireless Body Area Network

Wireless Body Area Networks(WBAN)is a small intelligent network composed of sensor nodes distributed around the human body.The sensor collects some important information of the human body and transmits it to the control center to realize the diagnosis and monitoring of the human body condition,and is widely used in medical,military,entertainment,consumer electronics,smart home and public services.It is closely related to people's daily life and is getting more and more attention.As China's population ages,the people's attention to health has deepened.The problems of social health care and the incidence of chronic diseases have been highly concerned by today's society,and scholars' research on wireless body area networks has been promoted.Since the energy of each sensor node in WBAN is limited,and the network topology changes with the movement of the human body,the energy consumption of the sensor node increases.Therefore,the introduction of energy harvesting technology has become one of the ways to effectively solve the energy efficiency problem.In recent years,domestic and foreign research scholars have carried out research on energy collection,information transmission,and coexistence of wireless energy collection and information transmission,and obtained a series of results.However,there is still a lack of research based on energy harvesting technology in wireless body area networks.Due to the limited energy,computing power,storage capacity and communication distance of the sensor nodes in the wireless body area network,the network has dynamic characteristics.Research on information and energy transmission based on energy harvesting technology is of great significance to the development and application of body area networks.In cooperative communication,the relay-assisted transmission is introduced for the problem that the distance between some sensor nodes is too long or the channel state is poor during the actual transmission process,and the transmission effect is not good.However,excessive relaying increases the cost and complexity of WBAN and also affects human comfort.This paper focuses on the problems of wireless body network relay nodes,and proposes models and protocols for wireless energy and information transmission by sensor nodes.Firstly,set the location of the sensor node in the body area network,and use the intermediate sensor node as the relay cooperative transmission mode.Secondly,the relay proposes a new transmission protocol under the transmission protocol of energy splitting and time switching through the decoding and forwarding mode to realize the bidirectional transmission of energy and information.Finally,according to the two transmission modes in the wireless body area network,the optimal information transmission rate is optimized under different conditions such as relay position,transmission time and power,and the corresponding algorithm is used to optimize the network.In this paper,the wireless energy and information transmission models and protocols based on the above-mentioned intermediate sensor nodes are elaborated and demonstrated in detail,aiming at solving the problem of excessive energy consumption and sensor nodes in the wireless body area network.The wireless energy and information transmission model extends the life cycle of the network and reduces the number of wireless body network relay nodes.The main contents are as follows: By studying the energy and information transmission of the wireless body area network,the problem of excessive relay nodes and high network complexity of the traditional relay network is based on the TS transmission protocol,and the intermediate sensor nodes are used as the cooperative transmission idea of relaying,and the energy and information transmission model of wireless body area network is established,and the energy and information transmission of body area network are deeply studied.Energy and information transmission protocols based on energy segmentation and time switching are proposed respectively.The algorithms of wireless energy and information transmission under different transmission protocols are derived,and related mathematical models are established.According to the wireless energy and information transmission protocol,the maximum information transmission rate in the cycle is optimized,the optimization strategy is established by using constraints,the transmission rate of the model is optimized,and the information reliability transmission of the wireless body area network is realized.Simulations demonstrate the effectiveness of wireless energy and information transfer models.