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Transmission method and device for hybrid automatic request retransmision

A technology of a transmission method and a transmission device, which is applied in the transmission system, error prevention/detection through transmission repetition, electrical components, etc., can solve the problems of reducing transmission efficiency, waste of resources, etc., and achieve the effect of improving transmission efficiency and saving wireless resources

Active Publication Date: 2010-05-12
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem of resource waste and transmission efficiency reduction caused by ACK / NACK errors when the HARQ layer reports the remaining errors reaching the maximum number of HARQ retransmissions.

Method used

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  • Transmission method and device for hybrid automatic request retransmision
  • Transmission method and device for hybrid automatic request retransmision
  • Transmission method and device for hybrid automatic request retransmision

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Embodiment Construction

[0032] In the HARQ process, before each HARQ PDU (Protocol Data Unit, protocol data unit) transmission, the sender will send a Control message (control message) to instruct the receiver how to receive the subsequent transmission. In order to effectively detect that NACK is misunderstood as an ACK error at the HARQ layer, in the prior art, a cause (reason) bit is introduced into the Control message before each HARQ PDU transmission. When cause=0, it indicates the reason for the end of the last transmission It is because the sender receives the ACK and will start to transmit new data; when cause=1, it means that the reason for the end of the last transmission is not because of receiving the ACK, but because of other reasons, such as reaching the maximum number of HARQ retransmissions. The receiving end can judge whether a NACK / ACK error occurs according to the content of the cause bit.

[0033] by figure 2 The data packet transmission process shown is taken as an example. The ...

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Abstract

In this method, the sending end (SE) receives the affirming info (AI) of HARQ PDU of reaching the max HARQ retranslation number of times (MHRN). If the affirming result (AR) of AI is NACK, SE informsthe receiving end (RE) of AR. If receiving the AR error indication from RE in the preset waiting time, SE will cancel the remains error report. This invention also discloses a HARQ translation device.When MHRN has reached, this invention prevents the successfully translated HARQ PDU from reporting as a remains error. Thus the ARQ retranslation is no longer needed. This saves the wireless resourceand raises the translation efficiency.

Description

technical field [0001] The present invention relates to the realization of the data link layer of the wireless communication system, in particular to a HARQ (Hybird Automatic-Repeat Request, Hybrid Automatic-Repeat Request) transmission method and a device applying the method. Background technique [0002] In order to make the cellular mobile communication system maintain a certain competitive advantage compared with other wireless access technologies in the next 10 years, the LTE (Long Term Evolution, long-term evolution project) has already started in the 3GPP (Third Generation Partnership Project) organization. ) formulation of technical standards. During the discussion of the LTE architecture and related technologies, a protocol structure using a two-layer ARQ (Automatic-Repeat Request, Automatic-Repeat Request) has been agreed upon. [0003] In the L2 (Layer 2, data link layer) structure of the LTE system, the two-layer ARQ includes an ARQ layer and a HARQ layer. Amon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/08H04L29/06
Inventor 高卓李国庆毕海洲
Owner DATANG MOBILE COMM EQUIP CO LTD