An industrial mobile network AP switching method based on dual wireless network cards

A wireless network card and mobile network technology, applied in wireless communication, network topology, electrical components, etc., can solve the problem that WiFi cannot achieve fast and autonomous switching between APs, so as to reduce switching delay and packet loss rate, fast and seamless Toggle, avoid the effect of ping-pong effect

Active Publication Date: 2017-06-30
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0005] With the continuous deepening of WiFi mobile application research, autonomous AP switching has attracted more and more attention, but research has found that WiFi cannot achieve fast and autonomous switching between APs

Method used

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  • An industrial mobile network AP switching method based on dual wireless network cards
  • An industrial mobile network AP switching method based on dual wireless network cards
  • An industrial mobile network AP switching method based on dual wireless network cards

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] The present invention implements a method for uninterrupted switching in an industrial mobile network architecture, the industrial mobile network architecture is an SDN-based industrial backhaul network architecture, and the architecture is as follows figure 1 shown. The SDN-based industrial backhaul network supports the openflow protocol, and stores and forwards data through flow tables. The mobile terminal node is connected to the AP through WiFi. Due to the limited coverage of the AP, the mobile terminal node needs to constantly switch between APs.

[0031] The present invention includes a pre-learning mechanism, a handover timing decision-making method, a non-repetitive channel allocation mechanism, and an overall handover process, etc., which will be described in detail below.

[0032] 1. Pre-learning mechanism

[0033] The pre-...

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Abstract

The invention provides an AP switching method based on dual wireless network cards. The mobile terminal actively scans the AP signal strength, and then compares the scanned signal strength with the signal strength of the current access AP. If the signal strength is greater than the current AP signal strength , then start switching, otherwise continue scanning until the switching is successful. In order to reduce the handover delay, the present invention proposes a pre-learning mechanism in view of the fact that the moving route is basically fixed in the industrial application scenario, that is, before the formal application, the AP location, switching sequence and other information of the application scenario are learned and stored in the terminal node. , in order to carry out targeted scanning and switching in formal applications. The invention solves the problem of rapid AP switching in the industrial mobile network scenario; adopts dual wireless network cards to realize non-interrupted switching; and adopts a pre-learning mechanism for a specific industrial application scenario to further reduce the scanning delay.

Description

technical field [0001] The invention relates to the field of AP switching in industrial mobile networks, in particular to an AP switching method for industrial mobile networks based on dual wireless network cards. Background technique [0002] With the rapid development of control, communication, computer, network and other technologies, the information integration technology of enterprises has developed rapidly, covering from the on-site control of the factory to the storage and transportation of products. Industrial networks play an increasingly critical role in areas such as increasing production speed, managing production processes, and rationally and efficiently processing. In recent years, Ethernet has entered the field of industrial control, and a large number of Ethernet-based industrial control networks have emerged. At the same time, with the development of wireless technology, wireless-based industrial control networks are gradually emerging. [0003] WiFi techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/18
CPCH04W84/12H04W36/18H04W36/30H04W36/008375H04W36/08
Inventor 曾鹏刘金娣李栋李志博俞雪婷于海斌
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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