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A method and system to reduce time delay influence

A delay and waterline value technology, applied in the field of network switching

Inactive Publication Date: 2011-01-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the packet switching network, there will inevitably be packet transmission delay, and the TDM network has very strict requirements on time slots, so TDM over IP services may be affected due to the packet transmission delay

Method used

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  • A method and system to reduce time delay influence
  • A method and system to reduce time delay influence
  • A method and system to reduce time delay influence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: setting a waterline for a downlink cache.

[0043] The processing flow of Embodiment 1 of the present invention is as follows figure 2 shown, including the following steps:

[0044] Step 201: Set an initial watermark value in the format conversion module. The initial watermark value can be set by the format conversion module itself, or can be set by other external modules such as the control module of the system. The initial waterline value can be set arbitrarily, but in order to shorten the processing time of the whole process as much as possible, it can be the optimal waterline value calculated theoretically or the optimal waterline value set according to experience.

[0045] Step 202: the format conversion module judges whether the payload capacity in the downlink cache reaches the waterline value, if so, extracts the payload in the downlink cache and encapsulates it into a TDM service and sends it to the TDM processing module and continues to execute ...

Embodiment 2

[0062] Embodiment 2: Two watermarks are set for one downlink cache.

[0063] In this embodiment, two watermarks are set for the downlink cache: watermark a and watermark b. The values ​​of watermark a and watermark b satisfy a certain functional relationship, and setting one of them will determine the other. A watermark conversion unit is correspondingly added in the format conversion module, which is used to obtain another watermark value according to the set watermark (such as watermark b) and the preset functional relationship between watermark a and watermark b.

[0064] Step 305: Add 1 to the watermark value and go to step 302.

[0065] image 3 The flow shown is figure 2 Simplified flow of the process shown. Through this process, it can be realized that when the transmission delay of the packet switching network becomes larger, the watermark value is automatically adjusted accordingly.

[0066] If the transmission delay of the packet switching network becomes smalle...

Embodiment 3

[0072] Embodiment 3: Two downlink caches are set.

[0073] Two downlink buffers are set in the format conversion module of this embodiment, which are respectively referred to as a first downlink cache and a second downlink cache. No watermark is set for the first downlink cache, and a watermark is set for the second downlink cache. The payload is first stored in the first downlink cache, and when the first downlink cache reaches the maximum storage capacity, the format conversion module then stores the payload stripped from the data packet from the packet switching data processing module into the second downlink cache In the cache, when the storage capacity of the second downlink cache reaches the set waterline, it will trigger such as figure 2 process shown.

[0074] If the first downlink cache and the second downlink cache are regarded as a unified downlink cache, compared with Embodiment 1, the implementation method of this embodiment is exactly the same as that of Embod...

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Abstract

The invention discloses a method for controlling delay in TDM over IP, which is used for stripping out the payload in the packet switching data packet and sealing the payload as TDM data-frame, comprising the following procedures: A. arranging downlink caching water line value which is used for storing the payload according to the correctness of the TDM data-frame; B. storing the payload strippedout of the packet switching data packet into the downlink cache; C. judging if the payload capacity stored in the downlink cache is more than the water line value, if yes, extracting the payload fromthe downlink cache and assembling the payload into TDM data frame and sending the data frame to the TDM processing module and then turning to step B; if not, turning to step B directly. The inventionalso discloses a system which is used for realizing the method. The invention can effectively reduce the effect of time delay on the TDM over IP business.

Description

technical field [0001] The present invention relates to the technical field of network switching, in particular to a method and system for reducing the impact of time delay in packet switching network transmission time division multiplexing service (Time Division Multiplexing over Internet Protocol, TDM over IP). Background technique [0002] At present, in order to meet the needs of the evolution of the communication network architecture, all telecom operators are eager to integrate various communication services in a network for transmission in a lower-cost transmission mode. Due to the low cost and wide application range of the packet switching network represented by the Internet Protocol (IP) network, it has become a development trend of the communication industry to integrate various services in a unified packet switching network for transmission. In the existing communication network, TDM is a widely used network switching technology. Therefore, in order to integrate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L5/22H04L12/46H04L12/861
Inventor 孙文华付海春王晓波张朋葛建阁刘明艳
Owner HUAWEI TECH CO LTD