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Automatic searching method for SDH frame idle overhead field

An automatic search and overhead byte technology, applied in electrical components, time-division multiplexing systems, multiplexing communications, etc., can solve problems such as insufficient encryption technology, inconvenient activation and use, troublesome process, etc., and achieve improved Ease of use and reliability, the effect of convenient use

Active Publication Date: 2006-08-30
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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Problems solved by technology

But the overhead field used must avoid the overhead occupied by the network intermediate equipment, otherwise the SDH encryption equipment will not work normally
At present, the solution of each manufacturer is to ask or test one by one to find out the overhead fields that the network intermediate equipment does not use for their own use. The process is very troublesome, and once the overhead field occupied by the network intermediate equipment changes, it is necessary to obtain the idle overhead field again. And change the design of encryption equipment, so that the opening and use of SDH encryption equipment is very inconvenient
At present, there are few domestic SDH encryption products, and the research on related encryption technologies is not deep enough. The SDH encryption equipment developed by a few units uses the SDH overhead field to transmit custom information, but none of them can avoid network intermediate equipment, activation and very inconvenient to use

Method used

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  • Automatic searching method for SDH frame idle overhead field
  • Automatic searching method for SDH frame idle overhead field
  • Automatic searching method for SDH frame idle overhead field

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Embodiment Construction

[0019] The automatic search method of a kind of SDH frame idle overhead field of the present invention is shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4: this method adopts the overhead inserting technology, by round-robin mode and formulates the round-robin idle overhead search protocol of encryption equipment , without affecting the normal communication, determine the available idle overhead field within a few seconds, and monitor it during the communication process, once the use of the idle overhead field by the network intermediate device changes, it will automatically search again;

[0020] The overhead insertion technology is that the encryption device takes out the overhead field one by one in byte or bit mode, and adds a self-defined field to replace it; the overhead insertion technology is a traditional overhead insertion technology.

[0021] The polling method is that the encryption device first selects the overhead X1, and determines whether the X1 position is available thr...

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Abstract

This invention discloses an automatic searching method for SDH frame idle overhead field, which applies an overhead plug technology and designs a polling idle overhead search protocol of a ciphered device to determine an available idle overhead field in a few seconds and automatically searches it again if there is any change of the network intermediate device to the idle overhead fields.

Description

technical field [0001] The invention relates to SDH encryption equipment, in particular to an automatic search method for idle overhead fields of SDH frames. Background technique [0002] There is an important and necessary function in the SDH encryption device: use the overhead field to transmit custom information, and use the custom information to ensure important functions such as password synchronization and key distribution. But the overhead field used must avoid the overhead occupied by the network intermediate equipment, otherwise the SDH encryption equipment will not work normally. At present, the solution of each manufacturer is to ask or test one by one to find out the overhead fields that the network intermediate equipment does not use for their own use. The process is very troublesome, and once the overhead field occupied by the network intermediate equipment changes, it is necessary to obtain the idle overhead field again. And change the design of encryption eq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/17H04J3/14
Inventor 刘涧疆张宝燕周波邵剑斌李鹰
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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