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Congestion control method of implementing reliable UDP transmission

A congestion control and reliable technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as network bandwidth occupation, network collapse, congestion, etc., to achieve the effect of ensuring reliability and saving network resources

Inactive Publication Date: 2008-05-21
BEIJING UNIONCAST NETWORK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Network congestion refers to the degradation of network transmission performance due to the large number of transmitted packets in the packet switching network and the limited resources of storage and forwarding nodes.
When the network is congested, the UDP service occupies the network bandwidth unfairly, resulting in a decline in the performance of the TCP service.
Because the existing UDP service lacks an end-to-end congestion control mechanism, it does not respond to the congestion indication signal, thus occupying almost all the available bandwidth on the link, and may cause the network to collapse in severe cases

Method used

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  • Congestion control method of implementing reliable UDP transmission

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Embodiment Construction

[0022] In view of the aforementioned technical background, the present invention provides a control method for reducing congestion in a network using UDP transport layer. The form of reliable UDP data transmission is: cutting the streaming data to be transmitted into multiple fixed-size data packets, and serially numbering the data packets; its congestion control is realized by deploying a control algorithm similar to TCP Reliability of packet transmission, and control and avoid network congestion.

[0023] The congestion control method of the present invention will be described in detail below.

[0024] As shown in Fig. 2, the present invention mainly includes a control strategy for the receiving end and a control strategy for the sending end to realize end-to-end congestion control under the UDP protocol.

[0025] The control strategy of the receiving end is as follows:

[0026] (1) Send a confirmation packet ACK message every time 4 packets are received.

[0027] (2) If ...

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Abstract

The invention relates to a congestion control method for realizing reliable UDP transmission, belonging to an end-to-end control mechanism, which is as follow: the congestion control mechanism of end-to-end under the UDP protocol is realized with control strategy for receiving end and control strategy for sending end; when every four packets are received by the receiving end, an acknowledgement packet is sent, wherein, the information of network traffic is contained in the acknowledgement packet; based on the information contained in the acknowledgement packet, the time interval for sending the packets is adjusted by the sending end depending on the measured round trip time change of the packets, and the sending rate of packets is regulated; the congested network is recovered to unblock, and the bandwidth between both transmission sides is fully utilized. The invention has the advantages of efficient resource saving.

Description

technical field [0001] The invention relates to a transmission method for exchanging data on the network, in particular to a congestion control method for realizing reliable UDP transmission. Background technique [0002] In recent years, with the rapid development of Internet technology and applications, the IPv4 network address space has been unable to meet the rapid expansion of user scale. In order to get rid of this predicament, most LAN operators on the Internet currently use internal addresses to solve the problem of insufficient IP address space: most computers in the LAN use private internal IP addresses, and share the same public external IP address. Access to the Internet; between computers in the LAN and the Internet, a network address translation gateway (NAT) needs to be set up to perform address translation between private internal IP addresses and public external IP addresses. Since the Transmission Control Protocol (TCP) cannot make it possible to directly ...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06H04L12/801
Inventor 李永华
Owner BEIJING UNIONCAST NETWORK TECH
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