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A link quality assessment method for multi-channel wireless networks

A technology for wireless network and link quality, which is used in wireless communication, multiple use of transmission paths, digital transmission systems, etc.

Inactive Publication Date: 2018-05-22
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] There is no clear wireless network link quality assessment method for multi-channel joint transmission in the prior art

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  • A link quality assessment method for multi-channel wireless networks
  • A link quality assessment method for multi-channel wireless networks
  • A link quality assessment method for multi-channel wireless networks

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Embodiment Construction

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] The method for evaluating the link quality of a multi-channel wireless network proposed in the present invention will be explained below by taking IEEE 802.11n WLAN as an example. For convenience and clear description of the content of the present invention, figure 1 Take two nodes (node ​​A, node B) as an example to illustrate, wherein, nodes A and B are regarded as the AP end and the STA end respectively, and N wireless network cards are bound to each of them, and each wireless network card works in different channel.

[0028] In order to ensure the system performance, that is, when there is external interference, it is necessary to switch ...

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Abstract

The invention discloses a link quality evaluation method of a multi-channel wireless network, which is used to solve the interference detection problem when each network node in the wireless network adopts multi-channel joint transmission data. Monitor system performance and changes in the performance of each working channel by periodically counting information such as system throughput, channel duty cycle, and the amount of data sent within a certain period of time. The link quality assessment method mainly includes three modes: mode A, periodically counting the total throughput and the busy and idle time of each working channel within a period of time; mode B, periodically counting the total throughput of each working channel within a certain period The amount of data waiting to be sent by the channel and the amount of data actually sent; method C, through the joint evaluation of method A and method B. If the system performance is obviously degraded, switch the working channel with the worst link quality to other suitable channels, so as to reduce the impact of external interference.

Description

technical field [0001] The present invention relates to the field of wireless communication, for wireless networks, especially wireless local area networks (WLAN) such as IEEE 802.11n / ac, when network nodes use multiple channels (or multiple frequency points, the following channels and frequency points are synonymous) to jointly transmit data. Road quality assessment method and system. At the same time, it is applicable to link quality prediction of wireless heterogeneous networks, wireless sensor networks, and wireless personal area networks. Background technique [0002] In wireless networks, efficient, accurate and stable link quality estimation is the basis for ensuring the performance of upper layer protocols. However, the inherent dynamic characteristics and unpredictability of wireless links make real-time and accurate link quality estimation a great challenge. [0003] At present, a large number of researchers have carried out in-depth research on wireless link qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/08H04L5/00
Inventor 薛青方旭明倪克顺张凯李鸿斌刘宏源陈琳王轶欧凌扬珺
Owner SOUTHWEST JIAOTONG UNIV
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