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Method for realizing jitter resistance in jitter precognition network

A network and buffer technology, applied in the field of communication, can solve problems such as waste and jitter bandwidth, achieve good error compensation, overcome jitter and bandwidth waste, and improve communication quality

Inactive Publication Date: 2008-02-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: to overcome the deficiencies of jitter and bandwidth waste in existing AAL2 etc. carrying voice / media streams, and to provide a method for realizing jitter resistance under the condition of coarse-grained time stamps, thereby making the network jitter Improve the communication quality of voice or other multimedia streams while reducing bandwidth waste when within a predictable range

Method used

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  • Method for realizing jitter resistance in jitter precognition network
  • Method for realizing jitter resistance in jitter precognition network

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Embodiment Construction

[0023] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0024] In the case of networking with protocols such as AAL2, the jitter caused by the underlying protocol is almost negligible. For example, the jitter caused by ATM is only a few microseconds, and the non-negligible jitter comes from the setting of the multiplexing waiting time. If the multiplexing waiting time If the network jitter is 5 milliseconds, the maximum jitter of the network is 5 milliseconds. Therefore, it can be considered that the jitter of the network is predictable (<=5 milliseconds). In the case of predictable network jitter, to achieve jitter resistance and reduce bandwidth waste requires Special jitter resistance function.

[0025] Unlike IP networks, when AAL2 and other voice / media streams are carried, there will be no packet continuation, so the serial number information does not need to be transmitted between two endpoints, thus savi...

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Abstract

In the method, frame serial number domain with rough time information is attached to message at message transmitting end under the condition that network jitter is foreknown and buffer zone is installed at message receiving end to let the message send out according to its frame serial number after the message waist for certain period when it comes into the buffer zone so that network jitter is eliminated; the receiving end can discover that communication counter end is restarted according to sudden-change of frame serial number and to apply corresponding synchronous measure to have communication carried on continuously.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for realizing jitter resistance when the network jitter is predictable when asynchronous transfer mode second adaptation layer (AAL2) is used to carry voice / media streams. Background technique [0002] At present, in order to provide telephone / multimedia communication services on the IP network with large jitter, in addition to the quality of service guarantee, it is also necessary to provide an anti-jitter buffer function at the end of the IP network to eliminate the impact of network jitter on voice / streaming media. With the help of Real-time Transport Protocol (RTP, Real-time Transport Protocol), the device at the receiving end can resume the regular transmission of voice / media streams, just like the IP network is just an exclusive channel with fixed delay characteristics. [0003] In the IP network, the range of network jitter is relatively large, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/26H04L29/06H04L12/56H04L27/01H04Q3/545H04L49/9023
Inventor 吴向斌李志同曾思南
Owner HUAWEI TECH CO LTD