基于冲突指示和分组隐藏节点冲突解析策略

发布时间：2018-04-19 20:10

本文选题：IEEE + ..　；参考：《软件学报》2014年06期

【摘要】：隐藏节点问题是导致IEEE 802.15.4协议性能下降的一个重要因素,而在IEEE 802.15.4中没有给出解决该类问题的具体方案.提出一种基于冲突指示和分组的隐藏冲突避免策略(hidden node collision detection and avoid strategy,简称HNCDAS),该策略采用分组方法将IEEE 802.15.4的CAP周期划分为多个等分时隙,从隐藏冲突导致的部分破损帧中提取出隐藏节点地址信息,依据当前获得的隐藏关系动态地将节点调整到相应的竞争组,竞争组内的节点在同一周期内仍按照二进制后退方法竞争发送消息,不同的竞争组在不同的时隙发送消息,从而彻底解决隐藏冲突问题.与其他隐藏冲突解析策略相比,HNCDAS具有额外开销少和动态调整等优点.从理论上证明了该策略的收敛性和解析策略时间的上限,实验结果表明,HNCDAS在数据传递率、吞吐率和能量利用率等方面都有明显的提高.
[Abstract]:The hidden node problem is an important factor leading to the deterioration of the performance of IEEE 802.15.4 protocol, but there is no specific scheme to solve the problem in IEEE 802.15.4. A hidden node collision detection and avoid strategy (HNCDASA) based on conflict indication and packet is proposed. The CAP period of IEEE 802.15.4 is divided into multiple equal time slots by grouping method. The hidden node address information is extracted from the partially damaged frame caused by the hidden conflict, and the node is dynamically adjusted to the corresponding competition group according to the current hidden relation. The nodes in the competing group still compete to send messages according to the binary backward method in the same period, and different competing groups send messages in different time slots, so that the problem of hiding conflicts is solved completely. Compared with other hidden conflict resolution strategies, HNCDAS has the advantages of less overhead and dynamic adjustment. The convergence of the strategy and the upper limit of the time of the analytic strategy are proved theoretically. The experimental results show that the HNCDAS has significant improvement in data transfer rate, throughput rate and energy utilization ratio.
【作者单位】：华南理工大学计算机科学与工程学院;暨南大学信息科学技术学院;
【基金】：国家自然科学基金(61003258,61370228) 国家重点基础研究发展计划(973)(2007CB311100) 中国博士后科学基金(20110490884) 广东省科技项目(201079,2011B010200039,2012A010701006) 广州市科技项目(11C42080722)
【分类号】：TP212.9;TN929.5

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