医疗无线体域网的可靠性保障机制研究
首发时间:2014-12-17
摘要:在非实时监控场景下,医疗无线体域网(Medical Wireless Body Area Network, MWBAN)负责采集非实时数据,然后将数据传输到远端服务器进行存储,此场景下数据传输的可靠性显得极其重要,然而目前体域网的相关研究关注的重点是节能,对数据可靠性考虑不足。本文设计的基于节点存储能力的信道接入机制考虑各个节点的内存溢出的差异性,根据节点不同的资源需求,对信道时隙进行合理的分配,以提高网络的数据可靠性。该机制包括三个主要部分,分别是节点需求的量化方法,信道资源分配方法以及MAC层超帧结构的设计。节点需求的量化方法根据节点内存占有率计算出信道资源需求值;信道资源分配方法根据节点提出的信道需求,以降低数据丢包率为目标,把有限的信道时隙分配给节点,实现信道资源的有效分配;MAC层超帧结构是信道分配时间的逻辑组织。仿真结果表明,基于节点存储能力的信道接入机制具有较好的可靠性能。
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Research on Reliability Provision in Medical Wireless Body Area Network
Abstract:In non-real-time monitoring scene, medical wireless body area network (MWBAN) is responsible for collecting the non-real-time data. Then it transfers the data to a remote server for storage. The reliability of data transmission under this scene is extremely important. The channel access mechanism based on storage capacity of node is designed in this paper to improve data reliability of the network. Considering the differences in memory overflow of nodes, this mechanism allocate the limited channel resource to the nodes. The mechanism consists of three parts, namely quantitative method of requirement, the channel resource allocation method and MAC layer super-frame structure design. The quantitative method needs to calculate the demand value for channel resources based on the memory occupancy. MWBAN allocate the limited time slots to nodes based on the channel demand value. MAC superframe structure was designed according to the allocation process of channel resource. The simulation results show that, channel access method based storage capacity has better performance on reliability.
Keywords: MWBAN Reliability Memory overflow
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No.4622595102429414****
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