Method for fragmenting data in stream control transmission protocol

A flow control transmission protocol and data fragmentation technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as packet loss

Inactive Publication Date: 2010-03-24
深圳市恒程汇文化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The technical problem to be solved by the present invention is to propose a method for data fragmentation in the flow control transmission protocol, which overcomes the problem that in the prior art, SCTP only determines the PMTU according to the minimum MTU value on all paths, and performs data fragmentation, which leads to serious loss. package problem

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  • Method for fragmenting data in stream control transmission protocol
  • Method for fragmenting data in stream control transmission protocol
  • Method for fragmenting data in stream control transmission protocol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1, manually optimize PMTU, increase the manual setting steps of PMTU

[0062] Such as image 3 As shown, the manual optimization PMTU of the embodiment of the present invention includes the following steps:

[0063] Step 301, after startup, according to the principle of discovering the MTU of the path, obtain the MTU value of all effective paths, and couple the current fragmentation value PMTU=PMTU';

[0064] Step 302, according to the link status of the network, it is judged whether it is necessary to adjust the current fragmentation value PMTU of coupling, if adjustment is required, then the next step is performed, if no adjustment is required, then continue to observe the link status of the network, and return to step 302;

[0065] Wherein, it is judged according to the link status of the network whether to adjust the current fragmentation value PMTU of the coupling, generally according to indicators such as packet loss rate (such as 3%) or bit error rate...

Embodiment 2

[0073] Embodiment 2, automatically optimize PMTU

[0074] Use the discovery path MTU rollback period or set a certain period independently. When the period arrives, start ping packet detection, and adjust the PMTU value again according to the statistical packet loss rate (or success rate) until satisfactory transmission quality is obtained.

[0075] Such as Figure 4 As shown, in the embodiment of the present invention, the use of the fallback period of the found path MTU to start the ping packet detection includes the following steps:

[0076] Step 401, when the rollback period of the found path MTU arrives, the effective path MTU will be rolled back to the initial value or the previous higher value, and the process of discovering the path MTU may be triggered at this time;

[0077] Among them, according to RFC1191's description of the back-off period for discovering the path MTU, the host can detect the increase of the path MTU, but because doing so needs to send a datagram...

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Abstract

The invention discloses a method for fragmenting data in a stream control transmission protocol (SCTP). The method is characterized in that the data fragmentation value of the SCTP is adjusted according to the link condition of a network, wherein, the data fragmentation value thereof is lower than or equal to the smallest maximum transmission unit (MTU) among all the efficient paths of the SCTP. The invention further provides two methods for realizing the manual optimization and automatic optimization of the PMTU (path maximum transmission unit) respectively, and reasonably adjusts the data fragmentation value of the SCTP according to the link condition of the network, thereby improving the reliability and efficiency of the communication link.

Description

technical field [0001] The present invention relates to a transport layer SCTP (Stream Control Transmission Protocol, Stream Control Transmission Protocol) in an IP bearer network, in particular to a method for data fragmentation in the SCTP. Background technique [0002] In the IP UTRAN (UMTS Terrestrial Radio Access Network, Universal Mobile Telecommunications System Terrestrial Radio Access Network) networking of the third generation mobile communication, IP technology is widely used in terrestrial transmission bearer. SCTP protocol is adopted to realize the reliable transmission of signaling data of Iub port, Iur port and Iu port. [0003] Such as figure 1 As shown, it is the SCTP protocol stack, and the SCTP layer is located above the IP layer and bears the upper-layer users. According to the description of RFC2960, the SCTP protocol can provide the following functions: [0004] Establishment and release of coupling: COOKIE mechanism is used in the process of coupl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/08H04L47/36
Inventor 黄东明胡典雄
Owner 深圳市恒程汇文化科技有限公司
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