计算机应用 ›› 2015, Vol. 35 ›› Issue (1): 35-38.DOI: 10.11772/j.issn.1001-9081.2015.01.0035

• 网络与通信 • 上一篇    下一篇

面向紧急数据的异步多信道工业无线网络调度方法

杨莉1,2, 张晓玲2, 梁炜2, 朱立忠1   

  1. 1. 沈阳理工大学 信息科学与工程学院, 沈阳110159;
    2. 中国科学院沈阳自动化研究所 网络化控制系统重点实验室, 沈阳110016
  • 收稿日期:2014-08-19 修回日期:2014-09-25 出版日期:2015-01-01 发布日期:2015-01-26
  • 通讯作者: 梁炜
  • 作者简介:杨莉(1989-),女,山东菏泽人,硕士研究生,主要研究方向:工业无线网络、通信协议;张晓玲(1982-),女,山西朔州人,副研究员,博士,主要研究方向:工业无线网络调度;梁炜(1974-),女,内蒙古赤峰人,研究员,博士,主要研究方向:工业通信、无线传感器网络;朱立忠(1967-),男,辽宁沈阳人,教授,主要研究方向:智能控制、图像处理与融合、移动通信.
  • 基金资助:

    中国科学院战略性先导科技专项(XDA06021000).

Emergency data scheduling method for asynchronous and multi-channel industrial wireless sensor networks

YANG Li1,2, ZHANG Xiaoling2, LIANG Wei2, ZHU Lizhong1   

  1. 1. School of Information Science and Engineering, Shenyang Ligong University, Shenyang Liaoning 110159, China;
    2. Key Laboratory of Networked Control Systems, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang Liaoning 110016, China
  • Received:2014-08-19 Revised:2014-09-25 Online:2015-01-01 Published:2015-01-26

摘要:

针对现有时分多址(TDMA)调度方法在面对异步多信道条件下工业紧急数据调度时表现出的时延大、控制信道(CC)饱和、能耗过高等问题,提出一种基于接收端的紧急数据调度方法——EOAM.首先,采用基于接收端的策略,解决了异步多信道调度中存在的控制信道饱和问题;其次,采用特殊信道(SC)结合优先级指示的方法保证紧急数据快速切换信道进行实时传输的同时,允许非紧急数据基于优先级指示标志采用退避机制占用信道,保证了特殊信道的利用率.该方法既适用于单播通信,也适用于广播通信.仿真实验结果表明,相比分布式控制算法(DCA),EOAM的传输延时最低可达8 ms,可靠性可达95%以上,能量消耗降低了12.8%,能满足工业紧急数据的传输需求.

关键词: 工业无线网络, 紧急数据, 多信道, 介质访问控制, 调度

Abstract:

The existing Time Division Multiple Access (TDMA) scheduling methods for industrial emergency data under the conditions of asynchronous and multi-channel medium have the problems of high delay, saturated Control Channel (CC), and large energy consumption. To solve these problems, an Emergency data scheduling algorithm Oriented Asynchronous Multi-channel industrial wireless sensor networks, called EOAM, was proposed. First, the receiver-based strategy was adopted to solve the problem of saturated control channel during asynchronous multi-channel scheduling. Then a well-designed Special Channel (SC) together with the priority indication method was proposed to provide fast channel switch and real-time transmission of emergency data; additionally, the non-urgent data was allowed to occupy channel by a backoff-based mechanism indicated by the priority indication method, which could ensure the utilization of special channel. EOAM was suitable for both unicast and broadcast communications. The simulation results show that, compared with the Distributed Control Algorithm (DCA), the transmission delay of EOAM can reach 8 ms, the reliability is above 95%, and the energy consumption is reduced by 12.8%, which can meet the transmission requirements of industrial emergency data.

Key words: Industrial Wireless Sensor Network (IWSN), emergency data, multi-channel, Medium Access Control (MAC), scheduling

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