Research On The Key Technology For Wireless Body Area Network

Wireless body area network (WBAN) has developed rapidly in recent years. Ahthough WBAN covers short distance, it is widely applied in many fields. Particularly, WBAN are most commonly used in medication and entertainment with development of the wearable technology. IEEE has released the standard oriented to WBAN, but the standard is not complete for the applications. For example, there is not a widely used mobility model for WBAN, the MAC layer in the standerd is too general to apply in specific scenes, and the routing algorithms for WBAN are ususlly proposed for wireless sensor network. This thesis focuses on four aspects of mobility model, MAC protocol, routing algorithm and the posture training system. The main content and innovation of the thesis are illustrated in four aspects and summarized below:1. Construction of BGMM mobility model oriented to WBAN. Firstly the thesis elaborates the importance of mobility moedel for WBAN, and determines the random Gauss-Markov mobility model as the theoretical basisi. Secondly, we proposes the 3 demensional human mobility mode of steady movements, which can extend the random Gauss-Markov mobility model to a group mobility model. Finally, the BGMM oriend for WBAN is proposed and the simulations verify the efficiency of the BGMM.2. Proposing the user priorities mechanism based on contention window adjustments Establishment of multi-user priorities mathematical model of throuput for homogenous modes and multi-user priorities energy model for heterogeneous modes. The thesis discribeds the current situation of the WBAN and introduces the related standard mentioned in IEEE802.15.6. By comparison and analysis of the contention access method and scheduled access method, we have done some researches on the impact of multi-user priority on WBAN. The strategy of user-priority setting is presented. The effections of multi-user priority on delay of high user priority nodes are obtained. Throughput methemedical model for multi-user priority of homogenous nodes is illustrated, and we also establish the energy model for heterogenous nodes.3. Putting forward the SPR routing algorithm based on social network theory. The thesis analyes the challenge of WBAN applications, and proposes the routing algorithm based on human movement and social network algorithm. The SPR algorithm takes the social characteristic,robustness, activity and distanc etc as metrics to deterimine the next hop,which can reduce the delay and energy consumption, and enhace the transmission efficiency. By using the characteristics of intimacy among different nodes, the nodes gourping is optimized. The redundancy and energy consumption are also improved.4. Design and Implementation of the posture training prototype system.The system is designed specifcly for fahion model catwalk traning. The framework of the system is presented. The framework includes sensor nodes module, sink node module, and real-time data processing module.Each module is designed also. Finally, we preliminary realize the system based on Arduino Curie Nano? The system can give a basic judgement of the fashion model catwalk traning.