An implementation method for congestion control in stream control transmission

A technology of congestion control and congestion state, applied in the IP network field, can solve problems such as unreasonable utilization of network resources, impact on network transmission performance, and data backlog at SCTP endpoints

Inactive Publication Date: 2007-12-12
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0019] However, the phenomenon of packet loss in the network may exist at any time. The existing method simply judges the quality of the current network performance based on a certain packet loss, which will lead to a decrease in the utilization rate of the network and make the network resources unable to be used reasonably.
For example, if a certain network packet loss is only accidental, not caused by real congestion, the current network potential is still great, and the processing capability of network elements is also very strong, the congestion control method that directly reduces the CWND parameter will cause Data backlog at SCTP endpoints, thereby affecting the transmission performance of the entire network

Method used

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0036] Fig. 2 is the implementation process of congestion control in a preferred embodiment of the present invention, specifically comprises the following steps:

[0037] Step 201 , the sending endpoint judges whether the T3 timer has expired, and if it expires, execute step 206 , otherwise execute step 202 .

[0038] The processes of steps 202-205 are the same as steps 102-105 in FIG. 1, and will not be repeated here.

[0039] Step 206 , judging whether the delay timer has been started, if not, go to step 207 , otherwise go to step 211 .

[0040] Step 207, the sending endpoint sets a timeout flag and starts a delay timer.

[0041] In this step, the duration of the delay timer is based on the network traffic of the current association (association), t...

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Abstract

The invention discloses a method to control congestion in flow control transmission. The method includes: sending end initiates the delay timer when T3 timer is overtime, a. judging said delay timer is overtime or not, if no then go to step b, else terminate the congestion control flow; b. sending end judges the network is congestion or not according to received selective affirmation message, if no then go step a; otherwise, the sending end turns down the control parameter of congestion to reduce the data signaling rate. The method in invention can release the network congestion, and ensure the national utilization of network.

Description

technical field [0001] The invention relates to IP network technology, in particular to a method for realizing congestion control in flow control transmission. Background technique [0002] The Stream Control Transmission Protocol (SCTP, Stream Control Transmission Protocol) belongs to the transport layer protocol and is used to reliably transmit user data between peer SCTP endpoints. Since the smooth transmission of user data mainly depends on transient network conditions, adjusting the congestion control parameters of SCTP endpoints according to different network conditions plays an important role in obtaining reliable data transmission performance. [0003] When SCTP endpoints performing flow control transfers are in reliable communication, substantial resources can be allocated to call traffic to ensure fast transfer of user data. If the above-mentioned transmission encounters severe congestion problems, unlikely communication will occur. In order to deal with the abov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L47/20
Inventor 汪碧海纳哥希
Owner HUAWEI TECH CO LTD
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