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Data-retransmitting method and apparatus

A technology of data retransmission and protocol data unit, applied in the field of data retransmission, can solve the problems of wasting system resources and affecting transmission efficiency, and achieve the effect of avoiding large block data retransmission and reducing waste.

Inactive Publication Date: 2010-05-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The present invention provides a data retransmission method and device to solve the problems in the prior art that when data transmission fails at the physical layer, the sending end needs to retransmit the entire data unit before division, which affects transmission efficiency and wastes system resources.

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  • Data-retransmitting method and apparatus
  • Data-retransmitting method and apparatus
  • Data-retransmitting method and apparatus

Examples

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Embodiment Construction

[0043] In this embodiment, data transmission in a WCDMA system is taken as an example for description.

[0044] After the protocol data unit is divided according to the physical layer transmission format, when an error occurs in the transmission of the segmented block at the physical layer, in order to avoid retransmission of the entire protocol data unit, the present invention adds the segmentation attribute field for the segmented segmented block Record the segmentation block identification, which can effectively identify a segmentation block among all the segmentation blocks saved at the local end, that is, identify a unique segmentation block; when the protocol data unit is segmented and concatenated, the physical frame is transmitted at the physical layer When an error occurs, it is only necessary to extract the corresponding segmented block from the stored segmented blocks according to the segmented block ID.

[0045] The data unit to be divided can be the protocol data ...

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Abstract

This invention discloses a method for re-transmitting data, in which, when the sending end segments a protocol data unit in terms of the transmission format of the physical layer, it registers the IDof the segment blocks in the segment attribute domain added for the segment blocks, which can identify a block effectively in all the blocks stored in the local end, the receiving end receives the physical frame and carries the segment block ID of the blocks in the physical frame in the receiving confirming information fed back to the sending end and when the sending end decides that the receivingend does not receive the blocks correctly, it picks up the corresponding blocks from the stored blocks and re-transmits them. This invention also discloses a data transmission device.

Description

technical field [0001] The invention relates to the fields of communication and computer, in particular to a method and device for retransmitting data. Background technique [0002] The technical specifications of the WCDMA system have gone through the stages of Release 99, Release 4, Release 5 and Release 6, and the standardization work on Release 7 has already begun to be implemented. At the same time, the longer-term LTE (Long Term Evolution) research has gradually become a new focus of standardization work. [0003] In the Release 99 system, the uplink and downlink use dedicated channels, which can reach a maximum rate of 384kbps; in Release 4, the Mobile Service Switch Center (MSC) is split into MSC Server (MSC Server) and Multimedia Gateway (Multi-media Gateway) GateWay, MGW), which separates control and business; in Release 5, the concept of IP Multi-media Subsystem (IPMulti-media Subsystem, IMS) was introduced, based on IP transport layer, and high-speed downlink pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/08H04L1/16
CPCH04L1/0079H04L1/1887H04L1/1809H04L1/1812H04W80/02
Inventor 秦亚莉李荣强
Owner HUAWEI TECH CO LTD
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