Reliable data transmission method and system based on SIP breakpoint resume

Abstract

The invention provides a reliable data transmission method and system based on SIP breakpoint resume. A stream data receiving client side sends a data stream application command to an SIP signal server, the SIP signal server forwards a message to a stream data sending server, the stream data sending server returns the message which contains a sign indicating whether breakpoint resume is supported or not, and the stream data receiving client side can judge whether the breakpoint resume process needs to be conducted or not according to the sign; if the breakpoint resume function is needed, the stream data receiving client side applies to the SIP signal server for segmental information, the SIP signal server forwards the segmental information to the stream data sending server, the stream data sending server calculates the segmental information according to the stream situation, and the segmental information is returned to the stream data receiving client side; the stream data receiving client side can simultaneously send multiple breakpoint resume data streams to the SIP signal server according to sets and requirements of the stream data receiving client side, wherein the data streams necessarily contain data such as segment numbers, serial numbers and receiving port numbers.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a reliable data transmission method and system based on SIP resumed transmission. Background technique [0002] In recent years, the SIP protocol has received more and more attention and development, especially with the development of security video technology, in order to solve the interconnection and information sharing of video systems, the Ministry of Public Security promotes the formulation of the national standard GB / T 28181, which is based on With the SIP protocol, major security manufacturers are scrambling to launch their own SIP-based products. [0003] SIP (Session Initiation Protocol) is an application layer signaling control protocol. A session used to create, modify and release one or more participants. An important feature of SIP is that it does not define the type of session to be established, only how the session should be managed. This flexibili...

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Problems solved by technology

[0004] In the current national standard based on SIP, the transmission data is on UDP. UDP itself is a connectionless protocol. It has the advantages of high efficiency, fast speed, and less resource occupation. It can improve the efficiency of system transmission data in the transmission of real-time data, but there are also some problems: it does not have a transmission mechanism to ensure reliable transmission of data, and cannot meet the needs of applications to transmit data and messages. Reliability requirements; and there is no mechanism for resuming transmission from breakpoints. When a network failure occurs, data transmission must be restarted, resulting in a lot of time wasted

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