计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

基于联合退避-功率感知机制的物联网节点信息防碰撞算法

郭小波 1,李松涛 1,张德贤 2   

  1. (1.河南工程学院 计算机学院,郑州 451191; 2.河南工业大学 信息科学与工程学院,郑州 450001)
  • 收稿日期:2016-06-02 出版日期:2017-06-15 发布日期:2017-06-15
  • 作者简介:郭小波(1980—),男,讲师、博士研究生,主研方向为无线传感器网络、物联网技术;李松涛,讲师、硕士;张德贤,教授、博士、博士生导师。
  • 基金项目:
    国家“863”计划项目(2012AA101008);河南省高等学校重点科研项目(16B520007)。

Node Information Anti-collision Algorithm for Internet of Things Based on Combining Backoff Power Perception Mechanism

GUO Xiaobo 1,LI Songtao 1,ZHANG Dexian 2   

  1. (1.School of Computer Science,Henan University of Engineering,Zhengzhou 451191,China; 2.College of Information Science and Engineering,Henan University of Technology,Zhengzhou 450001,China)
  • Received:2016-06-02 Online:2017-06-15 Published:2017-06-15

摘要: 物联网(IoT)节点防碰撞算法难以解决IoT节点数据冲突,造成严重的信号干涉。为此,提出一种新的物联网节点信息防碰撞算法。通过构建射频识别信号的离散正交调制与解调机制,降低节点间信号因互相干涉而导致的信道碰撞,建立联合退避-功率感知机制,定义节点数据退避防冲撞规则,以改善节点信号发射功率的波动幅度。实验结果表明,与ColorWava算法和信息决策控制算法相比,该算法具有更长的节点信号识别距离与更低的信道碰撞概率。

关键词: 物联网, 节点碰撞, 功率感知, 信号干涉, 时间窗口

Abstract: In order to overcome the problem of serious signal interference induced by Internet of Things(IoT)node data confliction in current IoT node anti-collision algorithm,a new IoT node information anti-collision algorithm is proposed.The discrete orthogonal modulation and demodulation mechanisms of the radio frequency identification signal are constructed to reduce the channel collision caused by the mutual interference among the nodes.Combining backoff power perception mechanism is built and node data collision avoidance rules are defined to improve the fluctuation range of the transmitted power.Experimental results show that this algorithm has a longer signal recognition distance and lower channel collision probability compared with ColorWava and Decision Information Controlling Algorithm(DICA).

Key words: Internet of Things(IoT), node collision, power perception, signal interference, time window

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