Automatic recognition method for adapting layer types of asynchronous transfer mode

An asynchronous transmission mode and automatic identification technology, which is applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as inability to realize AAL2/AAL5 recombination, unknown cells, etc.

Inactive Publication Date: 2010-12-08
ZTE CORP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

A key problem in this process is that since the acquisition equipment in the 3G protocol analysis (instrument) system is often used for research and development, installation and debugging of 3G equipment, and monitoring of the 3G network in operation, when the acquisition equipment from the physical layer link After receiving the cell, because there is no type information in the cell, it is not known whether the cell is AAL2 or AAL5, and the reassembly process of AAL2 and AAL5 is different, so AAL2 / AAL5 reassembly cannot be realized. Metatype adaptation becomes particularly important in collection devices

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  • Automatic recognition method for adapting layer types of asynchronous transfer mode
  • Automatic recognition method for adapting layer types of asynchronous transfer mode
  • Automatic recognition method for adapting layer types of asynchronous transfer mode

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Embodiment Construction

[0022] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0023] refer to figure 1 , the automatic identification method of AAL type according to the present invention comprises the following steps:

[0024] Step S102, receiving the ATM cell, and performing a hash search through the hash table according to the virtual path ID / virtual channel ID pair of the ATM cell.

[0025] Step S104, if the hashes match, go to step S106, otherwise go to step S108.

[0026] Step S106, reorganize according to the type found by the hash, submit the reassembled package, and return to step S102.

[0027] Step S108, perform reorganization according to the first type, perform cyclic redundancy check, if the verification is passed, identify it as the first type, update the hash table, submit the reorganized package, return to step S102, if the verification fails , then identify it as the second type, update the hash table, reorganize acco...

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Abstract

The autorecognition method includes following steps: S102,receiving ATM cell, carrying out Hash search through Hash table based on virtual path ID / virtual channel ID; S104,if it is Hash match, then gong to S106, otherwise gong to S108; S106, carrying out recombination according to result of Hash search, submitting recombined packet and returning back to S102; S108, carrying out recombination according to first type, and carrying out cyclic redundancy check (CRC); if CRC is passed, then ATM cell is first type, Hash table is updated, recombined packet is submitted, and returning back to S102; if CRC is not passed, then ATM cell is second type, Hash table is updated, packet is recombined according to second type, and returning back to S102. Using ATM collection device with multiple process unit, the invention realizes autorecognition for AAL2 / AAL5 types, and accomplishes recombination.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an automatic identification method of an asynchronous transfer mode adaptation layer type. Background technique [0002] Communication systems have been widely used in various fields of society, changing people's traditional way of life and work. In such a process, communication technology has also developed rapidly driven by people's needs. ATM (Asynchronous Transfer Mode, asynchronous transfer mode) is widely used in various communication networks because of its own technical advantages, and realizes the carrying of various communication functions. Since ATM can support voice, data, image and other services at the same time, in the current release and commercial version of 3G equipment, from NodeB (base station) to RNC (Radio Network Controller, radio network controller), from RNC to CN (Core Network, core network), ATM is being widely used. In a 3G protocol analysis (in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08H04L12/56H04L47/43
Inventor 汪承研徐春雨罗勇
Owner ZTE CORP
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