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

A technology of data transmission method and mechanism, applied in the direction of error prevention/detection using return channel, can solve the problems of PDU no longer suitable for transmission, reduce transmission efficiency, high initial transmission rate, etc., to improve wireless transmission efficiency and data transmission. The effect of high efficiency and flexible series connection

Active Publication Date: 2007-07-11
SHANGHAI ULTIMATE POWER COMM TECH
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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 the Upper ARQ is retransmitted, the channel characteri

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  • A data transfer method based on the data re-transfer mechanism
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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: Upper ARQ divides service data units according to basic transmission units, so as to realize data transmission and retransmission in order to adapt to 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 overhead of the frame headers; the HARQ at the receiving end does not need to perform segmentation corresponding to the concatenation of the basic transmission units at the sending end, Instead, the entire data concatenation block is extracted and saved; 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: t...

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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] Fig. 1 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, that is...

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Application Information

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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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