工业无线通信技术

Technology of Industrial Wireless Communication

随着可靠性的不断提高，WIA_PA网络逐渐被用户所接受，并且越来越多的应用在不同的行业之中。从本质上讲，工业无线网络WIA-PA是一种有中心的无线网络。作为有中心网络，一旦网络中心出现故障或异常，整个网络都将瘫痪，因此，网关是网络可靠性的瓶颈。为了提高整个网络的可靠性，本文提出了一种WIA_PA冗余网关的设计方案，即在物理上，将两个网关通过以太网接口相连．并在逻辑上，将它们分成主、副两个网关，其中副网关作为主网关的备份．在主网关发生故障的时候，取代主网关。从实际的执行效果上看，主网关出现故障后，副网关能够迅速取代主网关，大大增强了网络可靠性。

Along with the improvement of reliability,WIA-PA network has been gradually accepted by user,and been more and more applied in many different industries.Essentially,the WIA-PA network is a center wireless network.As a center network,onced the center failure occurs,the entire network will be paralyzed.Therefore the gateway is the bottleneck,of network.In order to improve the reliability of network,the paper designs the WIA-PA redundant gateway,which physically connected two gateways with Ethernet,and logically,divided them into primary and secondary.The secondary gateway,as the backup of the primary gateway,will instead the primary gateway when it fails.From the result of the actual execution,when the primary gateway fails,the secondary gateway can rapidly replace the primary gateway.This scheme greatly enhances the reliability of network.