Dynamic frequency scanning method used for short wave networking link building

A technology of dynamic frequency scanning and backup frequency, applied in the direction of access restriction, electrical components, wireless communication, etc., can solve the problems of large transmission delay of communication system, increase of link establishment time, longer scanning period, etc., to reduce the number of link establishment. time, the effect of improving transmission efficiency

Active Publication Date: 2014-10-08
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to: aim at the problems existing in the prior art, to provide a dynamic frequency scanning method for short-wave networking and link building, which solves the problem that when the traditional scanning method is used, if the number of frequencies increases, the scanning period will become longer. The link establishment time will also increase accordingly, which will bring a large transmission delay problem to the communication system

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  • Dynamic frequency scanning method used for short wave networking link building
  • Dynamic frequency scanning method used for short wave networking link building
  • Dynamic frequency scanning method used for short wave networking link building

Examples

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Embodiment 1

[0028] The present invention is a dynamic frequency scanning method for short-wave link building, which is suitable for multi-point multi-frequency short-wave access systems, such as Figure 5 As shown, each fixed access station is assigned a group of frequencies different from each other, and sends detection information on this frequency group. For example, fixed access station 1 allocates frequency group F1 (including frequencies f1, f2 and f3), and fixed access station Incoming station 2 distributes frequency group F2 (comprising frequency f4 and f5), and fixed access station 3 distributes frequency group F3 (comprising frequency f6, f7 and f8); Each mobile station (mobile station 1 and mobile station 2) adopts the present invention The scanning method scans and receives on all frequencies of the entire network, and monitors the quality of each frequency in real time; when communicating, both parties select a good frequency to establish a link for transmission. The scanning...

Embodiment 2

[0041] A dynamic frequency scanning method for link building in short-wave networking according to the present invention also includes the steps: in the scanning process of step 3, if the quality of a good frequency deteriorates, it is re-divided to a spare frequency, and then step 3 . If the quality of all good frequencies is all degraded and allocated to spare frequencies, go to step one.

[0042] All the other steps are the same as in Example 1.

[0043]This embodiment can dynamically adjust the scanning order according to the frequency quality situation of real-time scanning during the scanning process, and further optimize it, so as to avoid spending most of the time scanning it when the quality of the good frequency deteriorates and to avoid when the quality of the standby frequency becomes better. Can not get the key scanning, which can greatly reduce the link establishment time, thereby significantly improving the transmission efficiency of the entire short-wave commu...

Embodiment 3

[0045] In a dynamic frequency scanning method for link building in a short-wave network of the present invention, when step 3 is performed, the method further includes the step of limiting the total number of good frequencies to be scanned to N. The total number of good frequencies to be scanned can be set to 1, 2, or 3. Take the total number of good frequencies to be scanned as 3 as an example: after scanning and judging to get 3 good frequencies F1, F2, and F3, if a good frequency such as F8 is scanned again in the spare frequency, it will also Keep F8 as the backup frequency until one of the 3 good frequencies F1, F2, and F3 gets worse and is divided into the backup frequency. At this time, since there are less than 3 good frequencies, scan from the backup frequency The frequency with good quality is divided into 3 good frequencies, and then scanned. All the other steps are the same as in Example 1.

[0046] By setting the number of good frequencies, it is possible to sel...

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Abstract

The invention provides a dynamic frequency scanning method used for short wave networking link building. The method includes the following steps that (1), frequencies in a frequency set are sequentially scanned one by one, and whether each scanned frequency is a good frequency or not is judged according to the quality of a received detection signal on the frequency; (2), if the good frequencies occur, the other frequencies except the good frequencies are classified as standby frequencies, the step (3) is executed, and otherwise scanning continues to be performed according to the step (1); (3), the good frequencies are scanned one time firstly, then one standby frequency is scanned, then the good frequencies are scanned one time, another standby frequency is scanned, and the circulation is performed until the final standby frequency is scanned. The scanning sequence of the frequencies can be dynamically adjusted according to the quality of the scanned frequencies, and the time for link building can be obviously shortened, so that transmission efficiency of a whole short wave communication system is improved, and the dynamic frequency scanning method is particularly suitable for large-scale short wave networking application large in number of frequencies.

Description

technical field [0001] The invention relates to the field of short-wave communication, in particular to a dynamic frequency scanning method for short-wave networking and link building. Background technique [0002] At present, short-wave wireless communication technology has developed from the original point-to-point communication mode to wireless packet transmission network communication mode, such as HFGCS (Short Wave Global Communication System) in the United States. Due to the unstable characteristics of the short-wave channel, it is determined that the working mode of short-wave communication and the communication frequency used need to be adjusted in time as the channel quality changes. The traditional frequency scanning method, such as the 2G ALE method adopted by the American HFGCS system, adopts a fixed order and sequential scanning method. In one scanning cycle, each frequency in the frequency group is scanned once. Therefore, when the number of frequencies increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/16
Inventor 范伟闫鲁生李承敏王磊杜璋白天明
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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