摘要： 为满足工业现场测控任务对网络通信实时性的要求，提出一种基于IEEE802.15.4a的无线测控网络协议，其中的令牌控制子层采用令牌机制管理各站点对无线信道的访问，克服了CSMA/CA机制无序竞争的缺陷，保证数据传输的时间确定性，介绍协议栈模型、逻辑令牌环动态建立过程以及令牌故障的自恢复机制，并在硬件平台NanoNET上加以实现。实验结果表明，该协议能够在强电磁干扰环境中稳定运行，具备实时特性。
关键词:
IEEE802.15.4a标准,
令牌,
实时性,
工业无线网络
Abstract: In order to meet the real-time performance requirement of network communication in industial site monitoring and control tasks, a protocol of wireless monitoring and control network based on IEEE802.15.4a standard is proposed, in which, the token control sublayer manages the wireless channel access by using the token mechanism. It overcomes the shortcomings of the CSMA/CA disordered competition, and ensures the deterministic property of data transmission. The paper introduces protocol stack model, the dynamic creation of logic token ring, and the token self-recovery schemes. The protocol is realized on the hardware platform NanoNET. Experimental results show this protocol can run stably under intense electromagnetic interference environment, and possesses the real-time performance.
Key words:
IEEE802.15.4a standard,
token,
real-time performance,
industrial wireless network
中图分类号:
侯维岩;杨傲雷. 基于IEEE802.15.4a的无线测控网络协议[J]. 计算机工程, 2009, 35(16): 101-103.
HOU Wei-yan; YANG Ao-lei. Protocol of Wireless Monitoring and Control Network Based on IEEE802.15.4a[J]. Computer Engineering, 2009, 35(16): 101-103.