OPC UA (Object Linking and Embedding for Process Control Unified Architecture) issuing/subscription method applicable to IPv6 wireless sensor network

Abstract

The invention relates to an OPC UA (Object Linking and Embedding for Process Control Unified Architecture) issuing/subscription method applicable to an IPv6 wireless sensor network and belongs to thetechnical field of a wireless sensor network. According to the method, a border gateway in the IPv6 wireless sensor network is taken as a message forwarding proxy, and the proxy has a message filtering function based on message queues and message writerIDs. Moreover, the proxy also has resource discovery and fault-tolerant functions and can respond to resource discovery requests and wrong subscription requests of subscribers. According to the method, the OPC UA protocol issuing/subscription method is applicable to the IPv6 wireless sensor network, the energy of issuers and the subscribers aresaved, and the network load is reduced.

Description

Technical field [0001] The invention belongs to the technical field of wireless sensor networks, and relates to an OPC UA publish / subscribe method suitable for IPv6 wireless sensor networks. Background technique [0002] The IPv6 wireless sensor network is to apply IPv6 technology to the wireless sensor network to realize the full IP of sensor nodes, so that all sensor nodes in the network can be seamlessly connected with the existing IP network. This type of network generally has a central control architecture, and uses border routers (or border gateways) to realize the management of nodes in the network and the aggregation and forwarding of node data. The resources of border routers (or border gateways) are generally relatively rich, while nodes generally have the characteristics of limited resources and limited energy. The application of some technologies currently used in wired IP networks to IPv6 wireless sensor networks generally needs to address the above Features make ad...

AI Technical Summary

Problems solved by technology

These two methods are designed based on the wired IP network. Considering the IPv6 wireless sensor network scenario, the traditional UDP protocol multicast method needs the support of the multicast protocol, which is difficult to apply directly in the wireless scenario. The agent of the third-party protocol is used as the message The forwarding middleware method, because the agent can only forward the message according to the message header, will increase the number of packets sent by the node, which is not conducive to the node's energy saving and network overhead reduction

In view of this, the two methods under the publish / subscribe mode proposed by the OPC foundation are difficult to be directly applicable to IPv6 wireless sensor networks

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