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Data transmission method and device

A data transmission method and data packet technology, which are applied in the field of video transmission, data transmission method and device, can solve problems such as unsatisfactory data transmission effects, achieve the effects of reducing signaling overhead, reducing transmission delay, and improving data transmission quality

Inactive Publication Date: 2018-05-25
CHINA MOBILE COMM LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention expects to provide a data transmission method and device, at least partly solving the problem of unsatisfactory data transmission effect in the prior art

Method used

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  • Data transmission method and device
  • Data transmission method and device
  • Data transmission method and device

Examples

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example 1

[0162] In this example, a relay server is deployed on an adjacent base station, such as an eNodeB, and the sender sends video data to the relay server. After receiving the data packet, the relay server transmits the first feedback information to the sender according to the receiving status of the data packet. The sending end determines whether to retransmit the data packet according to the difference between the first feedback information and the priority of the transmitted video frame. After adding FEC redundancy to the received video data, the relay server sends the video data to the receiving end, and the receiving end also transmits feedback information, which is the second feedback information. The relay server may dynamically adjust the FEC redundancy parameters of the data packets of the FEC packet processing module according to the second feedback information. In this way, the feedback time between the sending end and the relay server is short, and the reception of imp...

example 2

[0164] Such as Figure 5 As shown, this example provides a transmission system comprising:

[0165] The sending end is used to send the original data packet, for example, the original video data packet;

[0166] The relay server, adjacent to the base station connected to the sending end, is used to receive the original data packet sent by the sending end, and instruct the sending end whether to retransmit according to the receiving status, and after receiving the original data packet, use FEC The technique generates FEC packets and sends the FEC packets. Here, the relay server may send the retransmission indication or the indication of successful data acquisition by transmitting the first feedback information to the sending end.

[0167] The receiving end is configured to receive the FEC data packet from the relay server, and can use FEC to perform data recovery and decoding, so as to obtain the data packet sent by the sending end. The receiving end can report the receiving...

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Abstract

The embodiment of the invention discloses a data transmission method and device. The data transmission method applied to a relay server comprises the steps of receiving an original data packet sent bya transmitting end; sending first feedback information to the transmitting end according to a receiving state of the original data packet; carrying out FEC (Forward Error Correction) coding on the original data packet, thereby generating FEC redundant information and an FEC data packet, wherein the FEC data packet is generated based on the original data packet and the FEC redundant information; and sending the FEC data packet to receiving end. The method and the device are characterized by low transmission delay, high reliability and high transmission quality.

Description

technical field [0001] The invention relates to video transmission technology in the communication field, in particular to a data transmission method and device. Background technique [0002] When transmitting real-time video on a wireless network, in order to reduce the adverse effects of video data loss and errors on the decoding quality, some error control techniques need to be used to improve the reliability of video data transmission on the network. Two methods are usually used: Automatically request retransmission (automatic repeat request, ARQ) and forward error correction (ForwardError Correction, FEC). ARQ guarantees the reliability of data through feedback and response, but it consumes a lot of resources at the sending end and has a long delay; FEC detects and corrects data errors by generating certain redundant data, and allocates uplink bandwidth in the TD LTE environment of time division multiplexing The downlink bandwidth is smaller than the downlink bandwidth...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/16H04L1/18
CPCH04L1/004H04L1/16H04L1/18H04L1/1806H04L1/1812
Inventor 张世俊柴鑫刚
Owner CHINA MOBILE COMM LTD RES INST
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