计算机工程 ›› 2019, Vol. 45 ›› Issue (2): 42-52.doi: 10.19678/j.issn.1000-3428.0050862

所属专题: 物联网专题

• 物联网专题 • 上一篇    下一篇

工业物联网密集场景中的演进型时隙分配机制

许浩然,刘广钟,贾建鑫   

  1. 上海海事大学 信息工程学院,上海 201306
  • 收稿日期:2018-03-20 出版日期:2019-02-15 发布日期:2019-02-15
  • 作者简介:许浩然(1995—),男,硕士研究生,主研方向为物联网、工业无线传感器网络、无线通信;刘广钟,教授、博士;贾建鑫,博士研究生。
  • 基金项目:

    国家自然科学基金(61202370);上海市教委科研创新项目(14YZ110);中国博士后科学基金(2014M561512);上海海事大学创新基金(2017ycx064)。

Evolutionary Slot Allocation Mechanism for Industrial IoT Dense Scenario

XU Haoran,LIU Guangzhong,JIA Jianxin   

  1. School of Information Engineering,Shanghai Maritime University,Shanghai 201306,China
  • Received:2018-03-20 Online:2019-02-15 Published:2019-02-15

摘要:

随着工业无线传感器设备数量的增加,传统IEEE 802.15.4 CSMA/CA协议已不能满足工业无线传感器网络密集场景。为此,提出一种演进型时隙分配机制,为密集场景下的工业无线传感器网络提供合理的时隙分配策略。基于当前最大时隙数构建可分配的时隙集合,根据退避状态指数和随机退避数计算位置指数,从而得到时隙分配方程,并依据该方程分配时隙数。通过不断演进CSMA/CA协议,建立状态转移模型。仿真实验结果表明,该机制可提高密集场景中时隙分配的公平性和传输命中率,降低数据发送延迟。

关键词: IEEE 802.15.4 CSMA/CA协议, 工业无线传感器网络, 密集场景, 演进型时隙分配机制, 数据延迟

Abstract:

With the increase of industrial wireless sensor devices numbers,the traditional IEEE 802.15.4 CSMA/CA protocol cannot effectively meet the industrial Wireless Sensor Network(WSN) dense scenario.Therefore,this paper proposes an evolved time slot allocation mechanism which can provide an effectively time slot allocation strategy for this scenario.A set of allocable time slots is constructed according to the current maximum number of time slots,the position index is calculated based on the backoff state index and the random backoff counter the time slot allocation equation is obtained.The state transition model is established by evolving the CSMA/CA protocol.Simulation expenimented results show that the mechanism can improve the fairness of the time slot allocation and the transmission hit rate in dense scenes and reduce the data transmission delay.

Key words: IEEE 802.15.4 CSMA/CA protocol, industrial Wireless Sensor Network(WSN), dense scenes, evolved time slot allocation mechanism, data delay

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