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Method for multi-home routing of stream control transmission protocol and device

A flow control transmission and multi-homing technology, which is applied in the field of communication data transmission, can solve the problem of not considering the data transmission rate and quality of the channel network, and achieve the effect of improving the transmission rate and quality, and improving the ability of channel failures

Active Publication Date: 2010-08-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a method and device for SCTP multi-homing routing to solve the problem that the existing SCTP multi-homing routing mechanism does not take into account the influence of the quality of the channel network on the data transmission rate and quality. defect

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  • Method for multi-home routing of stream control transmission protocol and device
  • Method for multi-home routing of stream control transmission protocol and device
  • Method for multi-home routing of stream control transmission protocol and device

Examples

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Embodiment 1

[0059] In this embodiment, the packet loss rate of the path is selected as a factor affecting the network quality of the path, and the evaluation function is defined accordingly, so that the network selects the path with the smallest packet loss rate as the path for data transmission, and the network equipment selects the path with the smallest packet loss rate The implementation method as the channel for data transmission is as follows: figure 2 shown, including the following steps:

[0060] Step 201: Quality assessment of network device activation path;

[0061] Here, SCTP may or may not have a multi-homing function. Generally, in practical applications, SCTP is configured to have the multi-homing function. Correspondingly, after SCTP is configured to have the multi-homing function, the quality evaluation of the path is started; if SCTP does not have the multi-homing function, there is no need to start the path quality assessment.

[0062] Denote the quality evaluation v...

Embodiment 2

[0079] In this embodiment, the user can select the packet loss rate of the path, the delay size, and the maximum transmission unit (PMTU, Path Maximum Transmission Unit) of the path as factors affecting the network quality of the path, and the function of defining the evaluation is:

[0080] H(P)=PMTU / (SRTT×(Q)^0.5+0.001);

[0081] Among them, H(P) can be expressed as the maximum transmission capacity of the path; PMTU represents the maximum transmission unit of the path, and the PMTU value of each path can be obtained by referring to the RFC1191 file; SRTT represents the smooth round-trip cycle, which is used to measure the delay of the recent path. It is one of the basic parameters of SCTP. You can refer to the RFC4960 file to get the SRTT value of each path; Q represents the packet loss rate of the path, and (Q)^0.5 represents the square root of the packet loss rate.

[0082] Here, the calculation of the Q value of the current path is specifically: Q=(1-a)Q+a(R / S);

[0083...

Embodiment 3

[0093] In this embodiment, the network device can use a special detection heartbeat message to obtain the quality evaluation value of the path. Specifically, the user still selects the packet loss rate, delay size, and PMTU of the path as the path that affects the path network. The quality factor, defining the evaluation function as:

[0094] H(P)=PMTU / (T×(Q)^0.5+0.001);

[0095] Among them, H(P) can be expressed as the maximum transmission capacity of the path; PMTU represents the maximum transmission unit of the path; T represents the delay of the path; Q represents the packet loss rate of the path, and (Q)^0.5 represents the square root of the packet loss rate.

[0096] Here, the calculation method of Q value is as follows image 3 shown, including the following steps:

[0097] Step 301: After the timer is started, the network device sends a path quality detection heartbeat message to each path;

[0098] Here, the start trigger of the timer and the duration of the timer ...

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Abstract

The invention discloses a method for multi-home routing of a stream control transmission protocol (SCTP). The method comprises the following steps: starting a quality assessment for a channel, calculating a quality assessment value of each channel; making a comparison between the quality assessment values of all the channels, and selecting the channel with the highest quality assessment value to send a data message. The invention simultaneously discloses a device for multi-home routing of the SCTP. When the method and the device are used, the network chooses the channel with the highest quality assessment value to send the data message, and in case that a channel fault affects the transmission efficiency, other channels with good qualities can be chosen for transmission. Therefore, the invention can enhance the capability of handling various channel faults, and can improve the transmission rate and the transmission quality of the data in further.

Description

technical field [0001] The present invention relates to a communication data transmission technology, in particular to a stream control transmission protocol (SCTP, Stream Control Transmission Protocol) multi-homing routing method and device. Background technique [0002] SCTP is currently the most widely used transport layer protocol in communication networks, to a large extent because SCTP has a multi-homing function, which allows an SCTP connection to select and switch between multiple transmission paths, thereby improving network fault tolerance Ability. [0003] The so-called multi-homing means that an SCTP connection can transmit data through multiple logical links of the IP layer. Here, the logical links of the IP layer can also be called paths; there is a backup relationship between the paths. After the path is interrupted, the data will be switched to other reachable backup paths for transmission. [0004] In SCTP, path failure is not only manifested as physical l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L12/24H04L45/02H04L45/28
CPCH04L45/028H04L45/10H04L45/12H04L45/02
Inventor 闫新成吉晓威杨长江陈静媛谭颖杜骏王爱民刘建业
Owner ZTE CORP
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