Network data transmission method

Abstract

The invention discloses a network data transmission method in the technical field of network communication. The method comprises a process of establishment and release of connection, a process of data transmission and a process of regular handshake, wherein the process of establishment and release of connection comprises that: a client initiatively transmits an initial message to a server to request establishment of connection; and the server authenticates and saves the connection information and enters a connection establishing state; the process of data transmission comprises that: the client and the server respectively transmit a data message to each other, and if the opposite side receives the data message, the client or the server continuously transmits the next data message, otherwise, the data message is retransmitted; and the process of regular handshake comprises that: the client and the server respectively transmit a heartbeat message to each other through a first network link and a second network link, if the opposite side receives the heartbeat message, the connection is normal; if the opposite side does not receive the heartbeat message, the heartbeat message is retransmitted; and if the first network link and the second network link are failed, the connection is determined to be interrupted. The invention provides a high-reliability high-real-time network data transmission protocol.

Description

technical field [0001] The invention belongs to the technical field of network communication, and in particular relates to a network data transmission method. Background technique [0002] At present, the transmission protocols used on the IP network mainly include UDP, TCP, and SCTP, etc., and their characteristics are as follows: [0003] (1) UDP: connectionless, message-oriented (the transmission mechanism used by the transport layer to provide packet transmission services to the upper layer), unreliable transmission, and low delay. [0004] (2) TCP: connection-oriented (confirmation and confirmation mechanism used by the transport layer to provide reliable transmission to the upper layer), flow-oriented (transmission mechanism used by the transport layer to provide data stream delivery service to the upper layer), reliable transmission, and uncertain delay. [0005] (3) SCTP: connection-oriented, message-oriented, reliable transmission, uncertain delay. [0006] From t...

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Problems solved by technology

[0004] (2) TCP: connection-oriented (confirmation and confirmation mechanism used by the transport layer to provide reliable transmission to the upper layer), flow-oriented (transmission mechanism used by the transport layer to provide data stream transmission service to the upper layer), reliable transmission, and uncertain delay

[0005] (3) SCTP: connection-oriented, message-oriented, reliable transmission, uncertain delay

[0006] From the above transmission characteristics of UDP, TCP and SCTP, it can be seen that the UDP protocol cannot provide a reliable transmission mechanism, so it cannot be used in occasions requiring reliable transmission.

The TCP protocol does not support the backup of the transmission network, so it cannot be used in occasions that require high reliability transmission through network backup

The SCTP protocol adopts the confirmation mechanism of overtime retransmission, and the calculation of the timeout period is affected by the average delay of the network. When the network delay increases, the retransmission time will increase accordingly, so it cannot be used for some transmissions that require real-time transmission. high occasion

In addition, although the SCTP protocol supports link backup, it cannot be switched quickly, which will also affect the reliability and real-time performance of transmission.

[0007] To sum up, in some occasions that require real-time, reliable data transmission and network redundancy, none of the above protocols can fully meet the requirements

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