Building Robust Wireless LAN for Industrial Control with DSSS-CDMA Cellphone Network Paradigm

Deploying Wireless LAN for Industrial Control (ICWLAN) has many benefits, such as mobility, low deployment cost and ease of reconfiguration. However, the top concern is robustness of wireless communications. Wireless control loops must be maintained under persistent adverse channel conditions, such as noise, large-scale path loss and fading. Many electro-magnetic interference sources in industrial environments, e.g. electric motor and welding, make wireless communication more challenging. The conventional IEEE 802.11 WLANs, which are designed for providing high bandwidth instead of high robustness, are therefore inappropriate for IC-WLAN. On the other hand, if the low data rate feature of industrial control is fully exploited by the state-of-the-art Direct Sequence Spread Spectrum (DSSS) technology, much higher robustness can be achieved. We hereby propose using DSSS-CDMA to build IC-WLAN, and exploiting the low data rate feature of industrial control loops for enhanced robustness. ...

• Type: Conference
• Year: 2005
• Where: RTSS
• Authors: Qixin Wang, Xue Liu, Weiqun Chen, Wenbo He, Marco Caccamo
• Keywords: Applied Computing, Ieee 802.11 Wlan, Industrial Control, Robustness, RTSS 2005