Jitter detection based congestion control method in city domain Ethernet

A technology of congestion control and Ethernet, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem of lack of users, achieve the effect of improving service quality, reducing average delay jitter, and improving effective throughput

Active Publication Date: 2008-01-30
WUHAN POST & TELECOMM RES INST CO LTD
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AI Technical Summary

Problems solved by technology

Although the data that has been transmitted to the client, but has accumulated a delay jitter that exceeds the tolerance of the user, it is actually meaningless to the user
Traditional congestion control methods are powerless for this situation

Method used

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  • Jitter detection based congestion control method in city domain Ethernet
  • Jitter detection based congestion control method in city domain Ethernet
  • Jitter detection based congestion control method in city domain Ethernet

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] The basic idea of ​​the jitter detection-based congestion control method (JDCC) is to detect and track the delay jitter during the transmission of multimedia data streams. If the delay jitter exceeds the user's tolerance threshold, the data packet is discarded, so that Unnecessary bandwidth waste can be reduced. In order to keep track of the accumulated delay jitter of multimedia data frames during end-to-end transmission, a jitter counter is needed. Obviously, the counter needs to be in a field in the data frame to record the jitter experienced during the entire transmission process. In the current metropolitan area Ethernet, the Q-in-Q networking mode is very common, and in the Q-in-Q networking mode, after entering the carrier network, the forwarding decision and the priority policy are all For the S-VLANTag label, the three bits of the pr...

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Abstract

The invention relates to a transmission control method of the multimedia data, in particular to a congestion control method based on the jitter measurement in the metro Ethernet network. The method utilizes the priority bit position of the C-VLAN Tag of the Q-in-Q the metro Ethernet network as the counter of the node time delay jitter. The accumulated time delay jitter of the multimedia data frame in the transmission process from end to end is followed. The data of the small jitter corresponds to the higher priority and the data of the higher jitter corresponds to the lower priority. The Ethernet data frame, the jitter value of which is larger than the user tolerate threshold value, is lost by the determination of the user tolerate threshold value. The invention can effectively reduce the average time delay jitter of the multimedia flow, which can improve the good throughput of the multimedia service and the service quality of the multimedia service.

Description

technical field [0001] The invention relates to a transmission control method of multimedia data, in particular to a congestion control method based on jitter detection in the metropolitan area Ethernet. Background technique [0002] With the widespread application of IPTV, video surveillance, and triple play, multimedia video services have become one of the fastest-growing applications on the current MAN. In the field of land network of the city at present, Ethernet has already become one of very extensive solutions. In fact, many operators implement Ethernet services on the land network of the city at present. How to better carry multimedia applications in the Metro Ethernet is one of the urgent problems to be solved in the Metro Ethernet. [0003] When the video stream or audio stream of a multimedia application is transmitted on a packet-switched network node, it is generally assumed that a constant delay relationship is maintained between data packets, but in fact thi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/56H04L47/32
Inventor 郝俊瑞余少华
Owner WUHAN POST & TELECOMM RES INST CO LTD
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