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Transmission method and device of hybrid automatic requesting retransmission

A transmission method and transmission device technology, applied in transmission systems, digital transmission systems, error prevention/detection using return channels, etc., can solve problems such as HARQ layer cannot be detected, achieve enhanced reliability and reduce retransmission delay Effect

Active Publication Date: 2011-08-03
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention aims to solve the problem that the HARQ layer in AHARQ cannot detect the problem that the originator misinterprets NACK as ACK after the transmission of the last HARQ PDU

Method used

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  • Transmission method and device of hybrid automatic requesting retransmission
  • Transmission method and device of hybrid automatic requesting retransmission
  • Transmission method and device of hybrid automatic requesting retransmission

Examples

Experimental program
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Embodiment 2

[0051] In the second embodiment, the originator can also use the Control message to feed back the confirmation result, for example, in Figure 5 In the transmission process shown, the originating HARQ receives ARQ PDU from the originating ARQ layer and converts it into a HARQ PDU; the originating HARQ sends a Control message to the receiving HARQ, and the cause bit in it is 0 to indicate that the ACK message sent by the receiving HARQ was received last time , the cause bit is 1 to indicate that the NACK information of the receiving end HARQ was received last time; the sending end HARQ sends an isolated HARQ PDU to the receiving end HARQ, and calculates the predetermined time limit t according to the transmission delay requirement T of the isolated HARQ PDU; the receiving end HARQ receives The received HARQ PDU is wrong, and NACK information is returned to the originating HARQ, but is misunderstood by the originating HARQ as ACK; the originating HARQ starts counting when it rece...

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PUM

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Abstract

The present invention discloses a HARQ transmission method comprising: a sending end receives the confirmation message to the independent HARQ PDU; when the confirmation result in confirmation message is ACK, the sending end sends the confirmation result to the receiving end. The present invention also discloses a HARQ transmission device. The HARQ transmission method and device thereof has the advantages of solving the problems that the transmission reliability of the independent HARQ PDU can not be guaranteed in HARQ PDU transmission. Furthermore, with regard to longer spacing interval for transmission between HARQ PDU, the HARQ transmission method and device thereof can also timely detect NACK / ACK errors and reduce retransmission delay of HARQ PDU.

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): H04L29/08H04L1/18H04L12/56
Inventor 高卓李国庆毕海洲
Owner DATANG MOBILE COMM EQUIP CO LTD
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