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HARQ remained error detection method and system

A technology of error detection and sending end, which is applied in the field of communication to achieve the effect of improving accuracy and avoiding false detection

Active Publication Date: 2014-05-07
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

By detecting the NDI field in the control signaling corresponding to the HARQ PDU Y data block, the HARQ layer at the receiving end mistakenly believes that a NACK / ACK residual error has occurred at this time, resulting in subsequent erroneous operations

Method used

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  • HARQ remained error detection method and system
  • HARQ remained error detection method and system

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Embodiment Construction

[0047] In order to solve the above-mentioned problem of HARQ residual errors and false detections, the present invention defines that the NDI values ​​of the NDI field are updated in the order of 00, 01, 10, 00, ... in the embodiment, and when the NDI value = 11, it is determined that it is due to some Some reasons, such as: the maximum number of retransmissions of a certain data block is reached, the HARQ process of transmitting a certain data block is preempted by high-priority data, etc., so that the sender must terminate the retransmission of the original data and must transmit the new data Condition.

[0048] In addition, in the embodiment of the present invention, NDSN (New Data Sequence Number, new data sequence number) is also defined as the sequence number of the nth HARQ transmission. At the sending end, the NDSN corresponding to the data transmitted this time is calculated on the basis of the NDSN of the data transmitted last time in an increasing or decreasing mann...

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Abstract

The invention discloses an HARQ residual error detection method and a system thereof, the core of which is that: when a transmitting end receives NACK feedback information of the prior data and retransmission of the prior data must be terminated due to particular reasons, novel data is transmitted by utilization of processes for transmitting the prior data, and control signaling corresponding to the novel data is transmitted; the NACK feedback of the prior data which is received by the transmitting end is carried by the prior field in the control signaling, but the transmitting end transmits state information of the novel data; a receiving end detects that no residual errors are generated according to the state information but the transmitting end transmits the novel data, the novel data is received and processed. By adoption of the invention, accuracy of HARQ residual error detection can be improved, thereby occurrence of error detection of HARQ residual errors can be avoided.

Description

technical field [0001] The invention relates to the communication field, in particular to the HARQ residual error detection technology. Background technique [0002] In the L2 (Layer 2) structure of the Long Term Evolution (LTE, Long Term Evolution) system, in order to provide sufficient reliability for the upper layer protocol, a double-layer automatic error detection and retransmission structure is adopted. In the two-layer automatic error detection and retransmission structure, the ARQ (Automatic Request, automatic retransmission) layer is located above the HARQ (Hybrid Automatic Request, hybrid automatic retransmission) layer, and is responsible for retransmitting the error caused by the remaining error of the HARQ layer. Data blocks that have been successfully transferred, and new data blocks to be transferred. [0003] While transmitting the data block, the HARQ layer will transmit the Process ID (process identification) of the HARQ process of the data block and the N...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/14H04L1/18H04L1/22
Inventor 李国庆高卓
Owner DATANG MOBILE COMM EQUIP CO LTD
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