Feedback-based network code TCP (Transmission Control Protocol) decoding method and device

A technology of network encoding and decoding method, which is applied in the direction of network flow/resource management, error prevention/detection using return channel, digital transmission system, etc. Delay out of control and other issues, to achieve the effect of meeting real-time requirements, smoothing jitter, and reducing decoding delay

Inactive Publication Date: 2016-10-12
INST OF INFORMATION ENG CAS
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Problems solved by technology

However, this fixed preset redundancy value R is difficult to adapt to the real-time changing channel packet loss rate
As a result, the packet loss does not match the redundancy compensation, and eventually the decoding matrix becomes very large, and the decoding delay is out of control

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  • Feedback-based network code TCP (Transmission Control Protocol) decoding method and device
  • Feedback-based network code TCP (Transmission Control Protocol) decoding method and device
  • Feedback-based network code TCP (Transmission Control Protocol) decoding method and device

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Embodiment Construction

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0056] The existing decoding method is roughly like this: every time a new TCP original data packet arrives at the network encoding layer, the encoding window of TCP / NC will always slide so that the encoding window always contains the latest W TCP original data arriving Packets, and compensate for wireless random packet loss in communication throu...

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Abstract

The present invention provides a network coding TCP decoding method and device based on feedback. The method includes: when receiving a TCP data packet sent by the TCP layer, the sending end performs the encoding packet that needs to be sent currently according to the packet loss rate of the current link. The number Sn is updated; according to the feedback information carried in the response message sent by the receiving end received at the current moment, the current number of encoding window locks Ln is determined; if the current number of encoding window locks Ln is not 0, the encoding window is fixed , and the W TCP data packets in the encoding window will be encoded according to the number of packets Perform preset encoding, and encode the encoded packets are sent to the receiver. The present invention can not only generate active compensation according to the network environment, but also make corresponding adjustments based on the feedback to speed up the full rank of the decoding matrix and reduce the decoding waiting time delay.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a feedback-based network coding TCP decoding method and device. Background technique [0002] Network coding TCP is a kind of communication technology that can effectively improve the transmission throughput and reliability of TCP in wireless networks. In a wireless network, due to terminal movement, object occlusion and other reasons, a large number of random packet loss often occurs. However, TCP, the most widely used transmission protocol today, was originally designed for ordinary wired networks. The congestion control algorithm of TCP only considers the packet loss caused by congestion. Network Coding TCP compensates for random packet loss in wireless networks by adding redundant information to TCP packets. However, when network coding TCP is applied to online applications (such as real-time multimedia applications), the decoding delay caused by decoding is a challe...

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Application Information

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IPC IPC(8): H04L1/16H04L1/00H04W28/02
CPCH04L1/0076H04L1/1607H04W28/0289
Inventor 孙继燕张棪唐鼎张舒黎陈鑫
Owner INST OF INFORMATION ENG CAS
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