Research On WBAN-oriented Network Deployment Algorithm

The increasing use of wireless networks and the constant miniaturization of electrical devices have empowered the development of Wireless Body Area Network(WBAN).The use of WBAN has improved the quality of patients' life.WBAN has brought the revolutionary change to the existing health care system.However the energy of WBAN nodes are limited and the power supply is not easy to change.How to reduce the network energy consumption and prolonging the life of the network are the first research goal of this thesis.Reasonable network nodes deployment strategy is one of the most efficient means to avoid excessive energy consumption and to prolong the life of the network.Fewer researches are done in the deployment of the network,and most of these studies assume that the number and position of the relay equipment is fixed,we cannot minimize the energy consumption and maximum the life of the network through the existing network deployment.In addition,the WBAN medical application is one of the widest WBAN applications,and the infusion is still the most commonly used treatment in clinical medicine.The most widely used tool of infusion is still the traditional intravenous drip infusion.The infusion process is not portable and real-time and cannot guarantee the accuracy of the infusion velocity.In this thesis,I mainly research the energy-aware network deployment algorithm in the background of WBAN medical application.For the patient's infusion application,the WBAN micro flow sensor measuring circuit is designed.The details are as follows:The energy-aware network deployment algorithm is studied.Firstly,based on the WBAN network model and the structure of communication system,the paper sets to study,especially in the intra-body communication.Further,based on the intra-body communication,the study of the network deployment algorithm is completed.Secondly,the WBAN channel model and the energy consumption model of the network node are determined and energy-aware network energy consumption model is proposed,in which the deployment location and the number of the relay equipment are determined by minimizing the energy consumption of the network.Finally the star network deployment,the EAWD network deployment and my network deployment are compared through experiments.Compared to the star and EAWD network deployment,the proposed network deployment has a significantly improvement in energy consumption and the life cycle of the network.According to the WBAN medical application,the WBAN micro flow sensor measuring circuit is designed.Firstly,the existing micro flow sensors are analyzed and compared,then the type of sensor suitable for WBAN micro flow detection is determined as the thermal micro flow sensor.Secondly,the hot film probe of WBAN micro flow sensor is studied and the suitable working currents of the temperature resistor Rs and the sensing resistor RH are obtained by experiments.Then,by adopting the measurement method of constant temperature difference,the function module and circuit each part's design of the measurement circuit are determined.Finally,the accuracy and stability of the measurement circuit are verified by experiments.