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Method, device and system for data retransmission

A data retransmission and retransmission technology, applied in the direction of error prevention/detection using return channels, can solve problems such as the negative impact of system transmission efficiency and system capacity, improve capacity and real-time transmission, prevent resource conflicts, and increase flexibility sexual effect

Inactive Publication Date: 2010-02-17
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

If a service suitable for synchronous HARQ is transmitted using asynchronous HARQ, or a service suitable for asynchronous HARQ is transmitted using synchronous HARQ, it will have a relatively large negative impact on system transmission efficiency and system capacity

Method used

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  • Method, device and system for data retransmission
  • Method, device and system for data retransmission
  • Method, device and system for data retransmission

Examples

Experimental program
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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the present invention is described in further detail:

[0023] In order to be compatible with synchronous and asynchronous HARQ transmission, the control signaling sent by the base station includes a retransmission mode indication, and the terminal can judge whether it is synchronous HARQ or asynchronous HARQ according to the indication, specifically:

[0024] The terminal receives the control signaling including the retransmission mode indication;

[0025] According to the retransmission mode indication, it is judged to adopt the synchronous HARQ or the asynchronous HARQ mode;

[0026] Send feedback to the base station according to the data receiving result;

[0027] Receive retransmission data sent by the base station according to the determined HARQ mode.

[0028] In this way, the base station can flexibly arrange synchronous HARQ or asynchronous HARQ according to different da...

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Abstract

The embodiment of the invention provides a method for data retransmission, which comprises the following steps: receiving a control signaling containing a retransmission mode indication transmitted bya base station through a terminal; judging whether to adopt a synchronous HARQ mode or an asynchronous HARQ mode according to the indication; and receiving the retransmission data transmitted by thebase station according to the determined HARQ mode. Correspondingly, the embodiment of the invention also provides the terminal and a communication system capable of identifying the data retransmission mode, which can select the synchronous HARQ mode or the asynchronous HARQ mode according to the retransmission mode indication of a process identification number or a sub-packet identification number so that the capacity and the transmission real-time property of the system are greatly improved, the flexibility of base station resource scheduling is improved, and the generation of a resource conflict is avoided.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a data retransmission method, device and system. Background technique [0002] 3G (the 3rd Generation Mobile Communication, third-generation mobile communication) system and the future 4G (the 4th Generation Mobile Communication, fourth-generation mobile communication) system, while having high-speed data transmission, the requirements for reliability are also significant Increase, especially in the harsh natural environment but also to meet the high reliability. Under this background, the HARQ (Hybrid Automatic ReQuest, hybrid automatic retransmission) technology has become one of the key technologies to meet high reliability. The HARQ technology is based on an ARQ (Automatic Request, automatic retransmission request) technology and an FEC (Forward Error Correction, forward error correction) technology. If the receiving end finds that an error occurs in a data pac...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16
Inventor 刘崇利
Owner HUAWEI TECH CO LTD
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