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利用空分多址(SDMA)技术的低时延特性,提出了一种低时延、高能效的移动Sink数据采集算法.首先利用SDMA技术的兼容节点对,按最小能耗最多配对准则,找出最佳的数据汇聚点;然后以兼容节点对的位置特征作为权值来源,使用加权最大配对算法(Hopcroft-Karp算法),得出各汇聚节点对应的最优配对节点对集合;最后找出具有最多配对数目和最大覆盖集的数据汇聚点集合P′,访问集合P′的近似最短路径即是移动节点的最终路径.仿真结果表明,该算法在保持SDMA技术低时延优势的同时,延长了网络平均生存期,具有更好的能量均衡特点.
Based on the low delay of space division multiple access (SDMA), a novel mobile Sink data acquisition algorithm with low delay and high energy efficiency is proposed.Firstly, using the compatible node pair of SDMA technology, And the best data convergence point is obtained. Then, the location feature of the compatible node pair is taken as the weight source, and the optimal pairwise node pair corresponding to each sink node is obtained by using the weighted maximum pair matching algorithm (Hopcroft-Karp algorithm). Finally, The shortest path to access set P ’is the final path of the mobile node with the data aggregation point set P’ with the maximum number of pairs and the maximum coverage set.The simulation results show that the proposed algorithm extends the low latency advantage of SDMA technology The average network lifetime, with better energy balance characteristics.