A data transfer method based on the data re-transfer mechanism

A technology of a data transmission method and mechanism, which is applied in the direction of error prevention/detection using the return channel, can solve the problems of poor adaptability to changes in the wireless channel transmission environment, lower transmission efficiency, and complex implementation, so as to improve wireless transmission efficiency, The effect of high data transmission efficiency and reducing data overhead

Active Publication Date: 2010-12-08
SHANGHAI ULTIMATE POWER COMM TECH
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AI Technical Summary

Problems solved by technology

The disadvantages of this method are: when the SDU is large, a high initial transmission rate is required; the adaptability to changes in the wireless channel transmission environment is not good
The disadvantage of this method is that when the HARQ transmission fails, the entire ARQ PDU must be retransmitted, which reduces the transmission efficiency
The disadvantage of this method is that when UpperARQ is retransmitted, the channel characteristics may change, and the original UpperARQPDU is no longer suitable for transmission
[0007] To sum up, the methods adopted in the prior art have low adaptability to the wireless transmission channel characteristics, and the implementation is complex

Method used

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  • A data transfer method based on the data re-transfer mechanism
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Embodiment Construction

[0032] The invention provides a data transmission method based on a data retransmission mechanism. This method is an ARQ-assisted HARQ data retransmission technology. Its core idea is: UpperARQ divides service data units according to basic transmission units, so as to realize data transmission and retransmission in order to adapt to the wireless transmission channel characteristics. The concatenation of the basic transmission units is carried out; the ARQ PDU frame headers are combined during HARQ framing to reduce the frame header overhead; the receiving end HARQ does not need to perform segmentation corresponding to the concatenation of the basic transmission units at the sending end, but It is to extract and store the entire data concatenation block; ARQ only retransmits the basic transmission unit that fails to be received, instead of retransmitting the entire SDU.

[0033] According to the core idea of ​​the appeal, the core of the present invention is that: the upper lay...

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Abstract

This invention relates to one data transmission method based on repeat mechanism, which comprises the following steps: send end top layer repeats control unit to generate Upper ARQ agreement data unit; the send end down layer repeats control unit to generate data series module by basic transmission unit and to generate data series block label; send end down layer repeats control unit to generate HARQ agreement data unit to send to receiver end.

Description

technical field [0001] The invention relates to a data retransmission mechanism, in particular to a data transmission method based on a data retransmission mechanism in a wireless transmission environment. Background technique [0002] In 3G Long Term Evolution (LTE), a two-layer retransmission mechanism using Hybrid Automatic Repeat Request (HARQ) and Upper Layer Automatic Repeat Request (Upper ARQ) has been agreed. Among them, HARQ mainly obtains the combination gain through the detection, retransmission and combination of error blocks, so as to improve the utilization rate of physical resources. The current two-layer ARQ structure mainly includes the following four types: [0003] figure 1 It shows the first double-layer ARQ PDU structure in the prior art. As shown in the figure, the upper layer ARQ protocol data unit (Upper ARQ PDU) is composed of a service data unit (SDU) and an Upper ARQ frame header (Upper ARQ header). The SDU is not divided in the Upper ARQ PDU, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18
Inventor 李国庆蒋守宁高卓毕海洲
Owner SHANGHAI ULTIMATE POWER COMM TECH
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