Message transmission system based on transmission control protocol and method thereof

Abstract

The present invention relates to data communication, and discloses a TCP-based message transmission system and its method, which can effectively ensure the smooth start of fast restart when packet loss and error packets occur in the state of interactive data flow in TCP-based data message transmission. Transmission, thereby reducing the adverse impact on TCP traffic and delay, ensuring that the TCP data flow maintains a high rate and avoids continuous oscillation. The key of the present invention is that two socket connections are compounded into one communication channel, and each socket connection is only responsible for carrying data transmission in one direction and the ACK message of response, that is, the data message and ACK message in the same direction pass through different sockets Channel transmission, to avoid them being mixed together, affecting the effective progress of fast retransmission.

Description

technical field [0001] The present invention relates to data communication, and in particular to a data packet retransmission technology based on a Transmission Control Protocol (Transfer Control Protocol, "TCP" for short). Background technique [0002] In today's world, many different manufacturers produce various types of computers, communication equipment and other information products. They run completely different operating systems, but the Transmission Control Protocol / Internet Protocol (TCP / IP for short) ”) protocol family allows them to communicate with each other. TCP / IP originated as a packet-switching network research project funded by the US government in the late 1960s, and its role has far exceeded its original vision. In the protocol cluster, TCP is currently the dominant high-level communication protocol. It is one of the simplest, earliest and most widely used communication solutions. Its protocol is open, flexible and socket programming interface is simple...

AI Technical Summary

Problems solved by technology

But for the application of the Internet, because the data flow will reach the destination through different paths, the packets arriving at the host may also be out of order, which is allowed by the TCP protocol

Resending such out-of-order packets will cause unnecessary network congestion

Second, the user cannot modify the TCP parameters

The reason is that TCP / IP is integrated in the operating system, and the manufacturer only provides socket programming interface, so users cannot modify TCP parameters

[0011] All in all, the current TCP technology cannot effectively solve the adverse effects of packet loss or error packets in transmission on TCP traffic and delay changes in the state of interactive data flow

[0012] The main reason for this situation is that in the prior art, the problem of packet loss and error packets in the state of interactive data flow is mainly solved by overtime startup that causes longer delays, or by modifying TCP parameters that cause network congestion

It does not solve the fundamental problem that data packets and non-data ACK packets in the same direction are mixed with each other in the interactive data flow, which is not conducive to the realization of fast retransmission

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