Industrial mobile network AP (Access Point) switching method based on double wireless network cards

A wireless network card, 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, reduce switching delay and packet loss rate, and meet application requirements. , the effect of fast and seamless switching

Active Publication Date: 2016-06-29
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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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

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  • Industrial mobile network AP (Access Point) switching method based on double wireless network cards
  • Industrial mobile network AP (Access Point) switching method based on double wireless network cards
  • Industrial mobile network AP (Access Point) switching method based on double 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 needs to constantly switch among the 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-lea...

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Abstract

The invention provides an AP (Access Point) switching method based on double wireless network cards. A mobile terminal actively scans the signal intensity of an AP and then compares the scanned signal intensity with the current AP signal intensity, begins switching when the signal intensity is higher than the current AP signal intensity, otherwise, continues scanning till successful switching. In order to reduce the switching delay, aiming at the characteristic that the mobile path in an industrial application scene is substantially fixed, the invention provides a pre-learning mechanism, namely learning information such as AP position, switching sequence and the like of the application scene before formal application, and storing the information to a terminal node, so as to realize directional scanning and switching in formal application. The method solves the problem of quick AP switching in the industrial mobile network scene; uninterrupted switching is realized by adopting double wireless network cards; and the pre-learning mechanism is adopted for the specific industrial application scene to further reduce the scan 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 Applications(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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