Feedback processing method and system for HARQ (Hybrid Automatic Repeat Request) -ACK (Acknowledge Character)

A technology of feedback processing and feedback mode, applied in the field of communication, can solve the problem of large bit sequence size and so on

Active Publication Date: 2011-10-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The main purpose of the present invention is to provide a HARQ-ACK feedback processing scheme to solve the situation in the related art that the size of the binding window is 1, and the size of the HARQ-ACK bit sequence sent by the UE is larger than the actual feedback required by the base station. question

Method used

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  • Feedback processing method and system for HARQ (Hybrid Automatic Repeat Request) -ACK (Acknowledge Character)
  • Feedback processing method and system for HARQ (Hybrid Automatic Repeat Request) -ACK (Acknowledge Character)
  • Feedback processing method and system for HARQ (Hybrid Automatic Repeat Request) -ACK (Acknowledge Character)

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Embodiment 1

[0054] The embodiment of the present invention discloses a HARQ-ACK feedback processing method, which can be used in an LTE-A TDD system, image 3 is a flowchart of a HARQ-ACK feedback processing method according to an embodiment of the present invention, such as image 3 As shown, the method includes:

[0055] Step S302, when the UE is configured with multiple serving cells, the uplink and downlink subframe configuration is 1 or 6, and the binding window size is 1, the base station sends DCI format 0 and / or 4 to the UE, wherein DCI format 0 and / or Or the two-bit DAI information in 4 is used to indicate the downlink scheduling situation of the current subframe;

[0056] In step S304, the UE determines the HARQ-ACK bit sequence fed back on the PUSCH and / or determines the number of REs occupied by the HARQ-ACK bit sequence according to the DAI information.

[0057] In this embodiment, the base station notifies the UE of the downlink scheduling situation, and the UE determines ...

Embodiment 2

[0103] This embodiment is applicable to the case where the downlink transmission modes of the primary serving cell and the secondary serving cell are both dual-codeword stream transmission modes. In this case, the following method is used to determine the HARQ-ACK bit sequence fed back on the PUSCH and / or the HARQ-ACK bit sequence fed back on the PUSCH The number of REs occupied by the ACK bit sequence.

[0104] like Figure 4 As shown, when the above two-bit downlink allocation indication information is A, the UE determines that the size of the HARQ-ACK bit sequence fed back on the PUSCH is 4, and the bit sequence is in, corresponding to the HARQ-ACK response message of the primary serving cell, Corresponding to the HARQ-ACK response message of the secondary serving cell; the UE uses O=4 when calculating the number of REs occupied by the HARQ-ACK bit sequence fed back on the PUSCH.

[0105] like Figure 5 As shown, when the above two-bit downlink allocation indication ...

Embodiment 3

[0109] This embodiment is applicable to the case where the downlink transmission modes of the primary serving cell and the secondary serving cell are both single-codeword stream transmission modes. In this case, the following method is used to determine the HARQ-ACK bit sequence fed back on the PUSCH and / or the HARQ-ACK bit sequence fed back on the PUSCH The number of REs occupied by the ACK bit sequence.

[0110] Such as Figure 8 As shown, when the above two-bit downlink allocation indication information is A, the UE determines that the size of the HARQ-ACK bit sequence fed back on the PUSCH is 2, and the bit sequence is in, corresponding to the HARQ-ACK response message of the primary serving cell, Corresponding to the HARQ-ACK response message of the secondary serving cell; the UE uses O=2 when calculating the number of REs occupied by the HARQ-ACK bit sequence fed back on the PUSCH.

[0111] Such as Figure 9 As shown, when the above two-bit downlink allocation ind...

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Abstract

The invention discloses a feedback processing method and system for HARQ(Hybrid Automatic Repeat Request)-ACK (Acknowledge Character). The method comprises the following steps that when the UE (user equipment) is provided with a plurality of service districts, the uplink subframe and the downlink subframe is configured as 1 or 6 and the size of the tying window is 1, the substation sends 0 and/or 4 in the form of DCI to the UE, wherein the two bit downlink allocation index (DAI) information of 0 and/or 4 in the form of DCI is used for indicating the downlink scheduling situation of the current subframe; and the UE determines the HARQ-ACK bit sequence and/or determines the RE number occupied by the HARQ-ACK bit sequence according to the DAI information. The method and the system achieve the effect that the size and the occupied resource unit of the HARQ-ACK bit sequence meets the practical requirement.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and system for processing feedback of a hybrid automatic repeat acknowledgment (HARQ Acknowledgment, HARQ-ACK for short). Background technique [0002] In a Hybrid Automatic Repeat Request (HARQ for short) mode, the codeword sent by the sender can not only detect errors, but also have certain error correction capabilities. After the decoder at the receiving end receives the codeword, it first checks the error situation, and if it is within the error correction capability of the codeword, it will automatically correct the error; if there are many errors and exceeds the error correction capability of the codeword, it can still be detected When an error occurs, the receiving end sends a decision signal to the sending end through the feedback channel, requiring the sending end to resend the information. In an Orthogonal Frequency Division Multiplex (OFDM for short) system,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16
CPCH04L1/1896H04W88/02
Inventor 戴博梁春丽张禹强
Owner ZTE CORP
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