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Stable network congestion control method with high-efficiency

A congestion control, Internet technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve the problem that the stability of the XCP system cannot be guaranteed theoretically, and achieve reasonable selection of control parameters, guarantee stability, and utilization. high effect

Inactive Publication Date: 2014-07-02
INST OF SOFTWARE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latency of the XCP implementation system is twice that of its streaming mode, so the stability of the XCP implementation system cannot be theoretically guaranteed

Method used

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  • Stable network congestion control method with high-efficiency
  • Stable network congestion control method with high-efficiency
  • Stable network congestion control method with high-efficiency

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Experimental program
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Embodiment Construction

[0029] The invention is based on the IPv4 network environment to realize a stable and efficient congestion control system. In this implementation, the control interval is taken as one-Nth of the average end-to-end delay, where N is 20. The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0030] Protocol extension

[0031] In order to meet the requirements of congestion control, it is necessary to extend the existing IPv4 standard and add a congestion extension header to the IP header, such as figure 1 Shown. The congestion extension header has been defined in the IETF draft-falk-xcp-spec-03. The present invention follows the provisions of the draft and is appropriately extended. The format of this extension header is given below.

[0032] The first field is the type of the next header.

[0033] The second field is the length of the extended header. The value is set to 20 bytes and the code is 0x14.

[0034] The third fie...

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Abstract

The invention discloses an Internet congestion control method, which belongs to the field of network technology. This method is as follows: 1) The sending end A adds a congestion extension header to the data packet to be sent; 2) The router updates the length of the next control interval according to the end-to-end delay di of the data packet flowing through; 3) The router calculates The total congestion feedback value Φk+1 in one control interval, and distribute Φk+1 to the data packets of each session flow in the next control interval; 4) The router updates the flow data packets according to the average window distance Xi of the received data packets The bandwidth increment to be confirmed is δi,j+1; 5) The receiving end B accumulates the bandwidth increment to be confirmed in the received data packet sent by the sending end A, and adds it to the bandwidth increment feedback of the returned data packet 6) The sender A adjusts its congestion window value W according to the bandwidth increment feedback value in the received data packet. The invention responds quickly to network load changes and improves resource utilization.

Description

Technical field [0001] The invention relates to a congestion control technology for a packet switching network, in particular to an Internet congestion control method based on explicit congestion information. Background technique [0002] At present, the congestion control function of routers in the Internet is weak. It only provides network congestion information to user terminal devices through packet loss signals, resulting in low network bandwidth resource utilization, high queuing delay and end-to-end network delay. The obvious congestion control protocol (XCP eXplicit Control Protocol) is a congestion control algorithm that enhances the efficiency of network resource utilization and reduces the network packet loss rate. It adds congestion control information to the data packet; adopts the strategy of measuring first and then allocating, that is, the router first measures the number of idle resources on its output interface, and then allocates these resources to each session...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04L47/27
Inventor 石志强吴志美方贵明
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI