Abstract: In terms of wireless access, system interconnection and extension in industrial control networks, the combination of IEEE802.11x and field-bus system is proposed. Arm-Linux based CAN/WLAN gateway is designed to interconnect CAN networks and WLAN characterized by shorter dimensions, lower power consumption, lower cost and stronger mobility. Detailed information is given about key issues of wireless extension, namely the wireless card driver, and a USB wireless adapter model is presented. The schedule strategy of wireless field-bus extension is analyzed to meet the real-time and stability requirements.

Key words: wireless field-bus, IEEE802.11, USB wireless adapter driver, wireless extension

摘要： 针对工业控制网络中的无线接入、系统互连及扩展等问题，提出将IEEE802.11与现场总线系统融合的方案。设计了基于ARM和Linux平台的CAN/WLAN网关，其体积小、功耗低、成本低以及移动性强，无缝连接了CAN网络和WLAN。对无线扩展的关键环节无线网卡驱动进行了陈述，给出一种USB无线网卡的驱动模型。并针对现场总线的无线扩展，探讨其调度策略，保证数据传输的实时性和可靠性。

关键词: 无线现场总线, IEEE802.11技术, USB无线网卡驱动, 无线扩展

CLC Number: 

• TP391