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Data transmission method and equipment

A data transmission method and equipment technology, applied in digital transmission systems, transmission systems, error prevention/detection using return channels, etc., can solve problems such as long retransmission delays, improve real-time performance, and avoid long delays Effect

Active Publication Date: 2011-04-13
HUAWEI TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] The embodiment of the present invention provides a data transmission method and equipment to solve the problem of long retransmission delay in the prior art

Method used

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  • Data transmission method and equipment
  • Data transmission method and equipment

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Embodiment Construction

[0045] figure 1 It is a schematic flow diagram of the method of the first embodiment of the present invention, including:

[0046] Step 11: The sending end obtains the importance indication information of the subsequent data packets of the current data packet, where the importance indication information is used to indicate the importance of the subsequent data packets.

[0047] Objects processed in mobile streaming media technology include video, audio, still images, bitmaps, vector graphics, ordinary text and timed text, etc. The encoding types for video include H.263 and H.264 of the International Telecommunications Union and MPEG-4 of the Moving Picture Experts Group (MPEG) of the International Organization for Standardization.

[0048] The video encoded data packet carries the control information and video data required for decoding. For example, after H.264 encoding, the output data unit types include: sequence parameter set, image parameter set, immediate refresh image,...

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Abstract

The invention discloses data transmission method and equipment. The data transmission method comprises the following steps of: acquiring the importance indication information of a subsequent data packet of a current data packet, wherein the importance indication information is used for indicating the importance of the subsequent data packet; acquiring the HARQ (Hybrid Automatic Repeat reQuest) maximum retransmission times of the subsequent data packet which corresponds to the importance indication information; and carrying out physical layer retransmission on the subsequent data packet according to the HARQ maximum retransmission times. The embodiment of the invention can reduce the retransmission time delay.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a data transmission method and equipment. Background technique [0002] Mobile streaming media service is the application of streaming media technology on mobile networks and terminals, mainly using mobile communication networks to provide audio and video streaming media services for mobile terminals. Mobile streaming media technology includes mobile streaming media codec, mobile streaming media transmission, mobile streaming media retransmission, etc. The data packets encoded by the streaming media correspond to different importances, the data packets with higher importance can be retransmitted with more times, and the data packets with lower importance can be retransmitted with lower times. The transmission of mobile streaming media will pass through the wireless transmission part and the wired transmission part, and the wireless transmission part is more prone to errors than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04L29/08
CPCH04L1/1877H04L1/1887H04L1/1812
Inventor 张锦芳梁文亮
Owner HUAWEI TECH CO LTD
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