Wireless Body Area Network Data Transmission Scheduling And Processing System Design

Intelligent wearable devices are experiencing a comprehensive and diversified development in healthcare and e-health.Many products that are based on the wireless body area network technology emerge and they open up new ways for the future of medical health.At the same time,the limited space resource,difficulties in energy supply,high real-time requirements of physiological data issues become main challenge in the body area network.The signals transmitted in health body area network often characterize the user's health state,so the reliability of the signal at the terminal becomes extremely important.The application of reasonable scheduling algorithm and transmission mechanism can improve the reliability of communication,thereby enhancing the performance of the whole network.However,how to design data transmission strategy and how to ensure the reliability of the data are two key problems.Starting with the problems faced by wireless body area network,this work designs reasonable data transmission strategies according to the characteristics of system,and conducts in-depth research from two aspects of theory and practical application.The contents are divided into two following parts:(1)Due to the change of node rate and communication quality of the network,nodes' limited buffer space can cause certain amount of data loss.Aiming at this problem,a priority scheduling mechanism of dynamic allocation queue length in MAC layer is proposed,which allocates buffer space according to the composition of different types of data in real-time data stream.The application of this mechanism can effectively improve the throughput of high-priority data in the system,reducing the average loss probability of high-priority data by 33%,and ensure the reliability of the data received at the terminal,so as to enhance the perception function of emergency situations in body area network.(2)Proposed a data processing model based on compressive sensing technology,which integrates SVD,compressive sensing,and wavelet transform.It is applied in the transmission process of the original signal from source node to the receiver to achieve denoising and reducing the data loss.Introduced a new equipment in body area network--smart mattress system.The data processing system was applied to the data transmission of mattress system to verify its feasibility in actual scene.This thesis studies the data transmission strategies in wireless body area network from two parts:the theoretical analysis and practical application,which provide a way for the reliable transmission of body area network.