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A data transmission method and system

A data transmission method and data transmission technology, applied in the direction of digital transmission systems, transmission systems, electrical components, etc., can solve the problems of the average arrival delay of original data packets becoming longer, increasing the calculation amount of node equipment, etc., to reduce the amount of calculation. Effect

Inactive Publication Date: 2016-11-30
BEIJING XINXUN CENTURY INFORMATION TECH
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Problems solved by technology

Obviously, using the fountain algorithm in long-distance high-speed network transmission can improve communication efficiency, but since the source node and the destination node need to perform encoding and decoding calculations respectively, it not only increases the calculation amount of the node equipment, but also leads to the average longer arrival delay

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  • A data transmission method and system
  • A data transmission method and system
  • A data transmission method and system

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, a data transmission method of the present invention includes:

[0030] Step 1. The source node counts the number of consecutive lost data packets fed back by the destination node in the last data transmission, and constructs a packet loss event set V: {v 1 , v 2 ,...,v s}, where v 1 , v 2 ,...,v s They are the packet loss events corresponding to the continuous loss of 1, 2, ..., s data packets in the last data transmission, s is the maximum number of consecutive lost data packets in the last data transmission, and each lost data packet is calculated separately package event v i The corresponding packet loss rate r i , i is an integer within the interval [1, s];

[0031] For example, in the last data transmission, if there...

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Abstract

A data transmission method and system, comprising: the source node counts the number of data packets lost continuously in the last data transmission, constructs a packet loss event set, and calculates the packet loss rate of each packet loss event respectively; the source node for each Packet loss event and packet loss rate, the original data packet is divided into several data blocks, and each data block is encoded separately, and then the encoded packets generated by all data blocks corresponding to each packet loss event form an encoded packet Finally, the encoded packet sets corresponding to all packet loss events constitute a multi-layer encoded packet set; the source node transmits the original data packet and the encoded packets contained in all the encoded packet sets in the multi-layer encoded packet set to the destination node; The node recovers the lost data packets in this data transmission. The invention belongs to the technical field of network communication, and can effectively reduce the calculation amount of node equipment and the average arrival delay of data packets while ensuring communication efficiency in long-distance high-speed network transmission.

Description

technical field [0001] The invention relates to a data transmission method and system, belonging to the technical field of network communication. Background technique [0002] Due to factors such as optical fiber aging, wrong routing configuration, and switching competition, there is a certain amount of packet loss in the data transmission process of long-distance high-speed networks. Due to the long round-trip time (RTT) in long-distance high-speed networks, the automatic repeat request mechanism is inefficient. [0003] Fountain algorithm (that is, LT code), as a rateless code, is very suitable for networks with large RTT and packet loss. For a specific introduction to the fountain algorithm, please refer to the Proceedings of the International Conference: In Proceeding of the ACM Symposium on Foundations of Computer Science: "LT Codes" (author: LubyM.LT Codes[C], conference location: Vancouver: CA , Published: November 2002). Obviously, using the fountain algorithm in ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 廖建新赵昀张磊韦安建沈奇威
Owner BEIJING XINXUN CENTURY INFORMATION TECH
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