Automatic retransmission requiring distribution feedback method in radio communication system

A technology of automatic retransmission request, wireless communication system, applied in the direction of error prevention/detection using return channel, can solve the problems of increasing message interaction and processing overhead between layers, reliability dependence, sacrificing reliability, etc. delay, reduce frequency, and improve overall performance

Inactive Publication Date: 2007-10-03
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the hybrid automatic repeat request entity HARQ104 at the sending end needs to feed back each acknowledgment message ACK to the automatic repeat request entity ARQ103, which increases the inter-layer message interaction and processing overhead
The reliability of the automatic repeat request entity ARQ depends on the reliability of the NACK->ACK error detection mechanism of the hybrid automatic repeat request entity HARQ106 at the receiving end, thus sacrificing the reliability provided by the error detection mechanism of the automatic repeat request entity ARQ itself sex

Method used

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  • Automatic retransmission requiring distribution feedback method in radio communication system
  • Automatic retransmission requiring distribution feedback method in radio communication system
  • Automatic retransmission requiring distribution feedback method in radio communication system

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Embodiment Construction

[0036] As shown in FIG. 2 , it is a working principle diagram of the ARQ distributed feedback system according to the embodiment of the present invention, wherein the transmitting end 101 and the receiving end 102 can be base stations or user equipments respectively. The connection 204 between the automatic repeat request entities 103 and 105 of the sending end 101 and the receiving end 102 and the connection 202 between the hybrid automatic repeat request entities 104 and 106 are logical connections, indicated by dotted lines. The automatic repeat request entities 103 and 105 of the sending end 101 or the receiving end 102 interact with the hybrid automatic repeat request entities 104 and 106 through the connection 201 and the connection 203 .

[0037]As shown in FIG. 3 , it is a principle diagram of ARQ distributed feedback according to an embodiment of the present invention, wherein the automatic repeat request entity 105 of the receiving end responds to the sending end with...

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Abstract

A method for feeding back automatic retransmission request distribution mode in radio communication system includes responding ACK message for ARQPDU being received successfully by receiving end ARQ or otherwise responding NACK message, carrying out the same operation for HARQ PDU being received successfully, feeding back error indication message to sending end HARQ for PDU being error-detected as being received successfully, reporting HACK message to sending end ARQ after retransmission frequency is up to preset number when HACK message responded from receiving end HARQ is received by sending end HARQ.

Description

technical field [0001] The invention relates to the technical field of digital mobile communication, in particular to a distributed feedback method of automatic repeat request (ARQ) in a wireless communication system. Background technique [0002] The automatic repeat request entity ARQ of the third generation mobile communication system is located in the radio link control layer of the radio network controller. ) loss detection, and three trigger modes of rotation detection. There are three types of ACK (Acknowledgment) or NACK (Negative Acknowledgment) packet formats in the status report: bitmap BITMAP, list LIST, and list RLIST. There are two mechanisms to reduce the frequency of status reports: prohibiting round-robin detection and prohibiting periodic round-robin detection. [0003] The hybrid automatic repeat request entity HARQ (Hybrid Automatic Repeat Request) is located in the medium access control layer and physical layer of the base station, and its feedback mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
Inventor 张健
Owner ZTE CORP
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