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Data receiving method and device

A data and receiving end technology, applied in the field of data receiving and devices, can solve the problems of low data transmission efficiency, inability to perform effective decoding, low efficiency, etc., and achieve the effects of improving reliability and reducing decoding workload.

Inactive Publication Date: 2008-10-15
张利娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of this data receiving method is low, and when there are too many data errors in the data packet, effective decoding cannot be performed, and the entire data packet can only be discarded. When the network / channel condition is poor, the data transmission efficiency is greatly reduced.

Method used

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  • Data receiving method and device

Examples

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Embodiment Construction

[0049] The basic thought of the present invention is, at the transmitting end of data: divide data into fixed-length information file pieces, carry out FEC coding to the information bit sequence that the bits of the same position in a plurality of information file pieces form after generating verification file pieces, Encapsulate each information file piece and verification file piece in a data packet for transmission; at the receiving end of the data: after decoding the bit sequence composed of bits at the same position in multiple file pieces to generate an information file piece, the The block number and slice number are combined sequentially to generate the original file data.

[0050] The data transmission method adopting the above idea of ​​the present invention, as well as the corresponding data receiving method and device will be described in detail below with reference to the accompanying drawings and embodiments.

[0051] image 3 It is a flow chart of the data tran...

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Abstract

The invention relates to a data receiving method and a device thereof. A data receiving terminal treats all document blocks received as follows: forward error correction decoding is carried out to sequence of Tb bits to be decoded of the document blocks to obtain sequence of Tb information bits decoded with length of K, wherein, a ith sequence of bits to be decoded is composed of every non-abradant information document piece of the document blocks and a ith bit in check document pieces in sequence according to the order of information document pieces and check document pieces; K information document pieces decoded of the document blocks combine to generate original document data of the document blocks, wherein, a mth information document piece decoded is composed of a mth bit in the sequence of Tb information bits decoded in sequence according to the order of information bit sequence. The data transmission method and the corresponding decoding method and device of the invention can greatly decrease decoding work of the receiving terminal and greatly improve the success rate of decoding and reliability of data transmission.

Description

technical field [0001] The invention relates to a data receiving method and device. Background technique [0002] Data is segmented into packets for transmission over the network / communication channel. In order to improve the reliability of data transmission, it is usually necessary to use network protocols or codes to provide error correction mechanisms. For example, when data is transmitted on the Internet, it is necessary to use the error detection and retransmission mechanism provided by the Transmission Control Protocol (TCP) for reliable data transmission, that is, when a packet loss is detected, the sender is notified to resend. [0003] However, when transmitting data in a multimedia broadcast channel, since the one-way channel is used and the data is sent in a one-to-many broadcast / multicast mode, the receiving end is not allowed to feed back data packet loss and error information to the sending end, and the above-mentioned Error detection and retransmission mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L1/0057H03M13/1157H03M13/2909H03M13/3761H03M13/6525H03M13/6552H03M13/6555H04L1/0043
Inventor 许进徐俊李松袁志锋胡留军
Owner 张利娟
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