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Adaptive deceleration method of data transmission

A data transmission and self-adaptive technology, applied in the direction of digital transmission systems, transmission systems, electrical components, etc., can solve problems such as the inability to use wrong data, and achieve the effect of improving efficiency

Active Publication Date: 2013-03-06
NO 722 RES INST OF CHINA SHIPBUILDING IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides an adaptive deceleration method for data transmission, which solves the problem that the error data of the previous transmission cannot be used and additional operations are required in the existing data transmission, so as to effectively improve the efficiency, accuracy and anti-interference performance of data transmission

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  • Adaptive deceleration method of data transmission

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with accompanying drawing

[0035] like figure 1 As shown, in the embodiment of the present invention, the sequence includes a packetization step, an encoding step and a data transmission step.

[0036]1. Packetization step: The sender divides all the data to be transmitted into 24 data packets in sequence D 1 、D 2 …D 24 , the number of bytes in each packet is equal;

[0037] 2. Encoding steps: each data packet D in the 24 data packets i , perform convolutional code encoding respectively, each data packet generates 4 blocks of coded data, and generates 24×4 blocks of coded data in total: D 1a 、D 1b 、D 1c 、D 1d 、D 2a 、D 2b 、D 2c 、D 2d …D 24a 、D 24b 、D 24c 、D 24d .

[0038] Encoding steps such as figure 2 As shown, 4 sets of 8-bit shift registers generate 4 different polynomials:

[0039] x 7 +x 4 +x 3 +x 2 +1,x 7 +x 5 +x 4 +x 3 +x 2 +1,x 7 +x 5 +x 3 +x 1 +1,x 7 +x 6 +x...

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Abstract

The invention relates to an adaptive deceleration method of data transmission, which belongs to a data processing method of data transmission and solves the problems that wrong data which are previously transmitted cannot be utilized and additional operation is needed in the existing data transmission. The adaptive deceleration method comprises the following steps of subpackage, encoding and data transmission, wherein the data transmission comprises the following steps that a plurality of data packages are decoded and verified one by one by a receiving terminal; if the data packages are verified to be correct, a new data package is transmitted by a sending terminal; otherwise, data are retransmitted by the sending terminal, and joint decoding of a previous frame is performed by the receiving terminal; and the steps are continuously repeated until the data packages are decoded to be correct. According to the adaptive deceleration method, transmission data are divided into a plurality of data packages, so that errors are localized, and the retransmission efficiency is increased; by utilizing the encoding technique, a plurality of blocks of encoding data are generated from the same section of data, thereby realizing joint encoding on the receiving terminal, and the utilization ratio of the wrong data is increased; and additionally, the adaptive change of the wave velocity is realized in accordance with the channel quality, thereby removing redundant information and additional operation from transmission, and the transmission efficiency is further increased.

Description

technical field [0001] The invention belongs to a data processing method for data transmission, in particular to an adaptive speed reduction method for data transmission. Background technique [0002] Due to the increasingly complex transmission channels and changing communication environments, how to maintain the high rate of data transmission while also enhancing the reliability of data transmission has become a difficult problem for experts and researchers today. Channel fading and delay are easy to cause Transmission errors or lack of data, so most of the current communication services use the method of retransmitting the entire packet of data and forced speed reduction, but in this method, the wrong data transmitted last time has no meaning and cannot be used , affecting the overall transmission efficiency, and when the channel environment is poor, the sending and receiving ends need to add additional redundancy codes to the data or formulate an agreement before establi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 胡健李鹰李莉包晓燕乔晓斌罗小宝张江林
Owner NO 722 RES INST OF CHINA SHIPBUILDING IND
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