A network optimization method for industrial wireless network

Abstract

The invention relates to a networking optimization method for wireless networks for industrial automation. The networking process comprises the following steps: adding a gateway broadcast time slot in the middle of a superframe so as to increase the number of broadcast messages sent by a gateway every unit time; a node to be accessed to an internet receiving the broadcast messages and adding candidate neighbors; selecting synchronization points to carry out time synchronization; utilizing collision detection to perform neighbor finding to find out bidirectional neighbor nodes; the node to be accessed to the internet selecting the bidirectional neighbor node, which ranks in the front, as an agent node from a neighbor table and sending a join request message to the agent node; the agent node forwarding the request message to the gateway; after receiving the join request message, the gateway allocating network resources to the node to be accessed to the internet, with the network resources being distributed to the node in a wireless message manner; and after all resource allocation messages are sent, the networking process is over. The networking optimization method greatly reduces networking time, improves the usage efficiency of join time slot resources, and enables the network resource allocation to be more reasonable.

Description

technical field [0001] The invention relates to wireless communication technology, and specifically describes a method for optimizing the networking process of a WIA industrial wireless network. Background technique [0002] Industrial wireless network WIA (Wireless Networks for Industrial Automation) technology is a highly reliable, ultra-low power intelligent multi-hop wireless sensor network technology with independent intellectual property rights launched by the Shenyang Institute of Automation, Chinese Academy of Sciences. This technology provides a self-organizing , The self-healing intelligent Mesh network routing mechanism can maintain high reliability and strong stability of network performance in response to dynamic changes in application conditions and environments. [0003] The establishment process of the WIA industrial wireless network is the process in which all nodes join the network and have data transmission capabilities and routing and transit capabilities...

AI Technical Summary

Problems solved by technology

A broadcast message is a message sent by a wireless device that contains the address of the sender and network time information. After receiving the broadcast message, the node extracts the address contained in it and adds it as a candidate neighbor; since all devices on the network need a unified time In order to work, it is necessary to select a synchronization point among the candidate neighbors to perform time synchronization: that is, to continuously collect broadcast messages sent by the synchronization node, extract the time information, calculate the corresponding relationship between the local time of the node and the network time, and obtain the network time; In this way, the time synchronization of network access nodes takes a long time; neighbor discovery: send a neighbor discovery message to each neighbor node, and if the response message from the neighbor node is received, the two-way neighbor can be confirmed; in this way, when the network join time slot is idle, it needs to Waiting for multiple superframes wastes network joining resources and prolongs network establishment time; selects the top two-way neighbor node from the neighbor table as a proxy node, sends a join request message to it, and the proxy node forwards The request message is sent to the gateway, and the gateway will allocate network resources to the node after receiving the join request message from the node and send it to the node in the form of a wireless message; the existing network resource allocation has long allocation time and low network real-time performance Problem: All resource allocation messages have been sent, and the joining can be completed; a resource message here includes only one type of message, the number of messages is large, and the interaction process is long; the node network access process is as follows: figure 1 shown

In the above process, there is redundancy in the interactive process, a large number of interactive messages, and unnecessary random waiting time, etc., resulting in a long time for the entire joining process

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