Energy Efficiency Analysis Of Wireless Body Area Network Based On Convex Optimization

With the development of modern science and technology progress,people's health is particularly important.As an important application of health monitoring,wireless body area network can not only serve the people's health,also can alleviate the current congestion problems can not be timely diagnosis and treatment of the hospital,which prompted wireless body area network has the significance of the research and development of a larger space.Wireless body area network is based on the human body,which is composed of sensor nodes and control nodes which are attached to the human body for collecting physiological signals.Because each sensor node distribution on the surface of the body or body in a wireless body area network,the transmission reliability and energy will be affected by various factors,so the wireless body area network energy efficiency optimization is the key problem to be solved.Wireless body area network this thesis will mainly focus on energy constrained discussions,according to the definition of energy efficiency,on the basis of the research of automatic repeat request technology and forward error correction technology in wireless body area network,starting from the angle of energy efficiency optimization,the mathematical model of wireless body area network energy efficiency,optimize the allocation of resources.The main work of this thesis is as follows:Firstly,the network structure and system model of the wireless body area network are analyzed.Based on the important significance of the error control technology to the wireless body area network,the related research at home and abroad is summarized.The convex optimization theory and its solving tools are analyzed,and the convex optimization theory including geometric programming problem is studied.Second,analysis of error control technology in wireless communication systems,including automatic repeat request(ARQ)technology and forward error correction(FEC)technology.A combination of two energy efficiency control mathematical model technology corresponding independent error in wireless body area network,to analyze whether the convex optimization problem or can be converted into a convex optimization problem into a convex optimization problem,if there is the optimal solution,to achieve optimal efficiency.Third,in different error control technology,analysis of the impact of modulation,error rate,packet length,communication distance and other parameters on the energy efficiency analysis,find the error control technology has the advantage of energy efficiency,optimize the allocation of resources.Under the ARQ and FEC technologies,with the change of signal to noise ratio(SNR)and the communication distance analysis whether the two kinds of technologies can make adaptive error control.