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Transmitting method for acknowledgment/negative acknowledgment and user terminal

A technology of reply message and error reply, applied in the field of communication, can solve problems such as not supporting binding of serving cells, indetermination, inconclusiveness, etc.

Active Publication Date: 2011-06-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the LTE-A TDD system, Format 1b joint channel selection is also supported to feed back ACK / NACK. Considering that Format 1b joint channel selection can support up to 4-bit feedback, therefore, LTE-A TDD needs feedback ACK / NACK Perform a certain form of binding operation, so that the number of feedback bits is limited to 4 bits, and the number of downlink serving cells that can be supported is also limited to 2
A current working assumption is to perform time-domain bundling instead of bundling between serving cells, but how to use Format 1b joint channel selection to feed back the ACK / NACK of each downlink serving cell and downlink subframe is still unclear. no firm plan
In addition, there is still no conclusion in the TDD system about how to obtain the corresponding PUCCH resources for the method of Format 1b joint channel selection
Another problem is whether the LTE-A mapping table used by FDD is applicable to the TDD system, and there is no conclusion yet

Method used

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  • Transmitting method for acknowledgment/negative acknowledgment and user terminal
  • Transmitting method for acknowledgment/negative acknowledgment and user terminal
  • Transmitting method for acknowledgment/negative acknowledgment and user terminal

Examples

Experimental program
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Embodiment 1

[0110] Embodiment 1: [Feedback mode determination method 1, feedback mode 1, subframe window M=2]

[0111] Such as Figure 5 As shown, assuming that the current base station configures two downlink serving cells for the UE, namely the primary downlink serving cell (PCell) and the secondary downlink serving cell (SCell), the current uplink subframe needs to feed back ACK / For a NACK response message, when the PDSCH of the downlink subframe corresponds to two response messages, perform a logical AND operation on the two response messages and then perform a sorting operation. It is assumed that the PDSCH scheduling of the SCell does not use cross-carrier scheduling, and the PDSCH scheduling of each downlink subframe includes a corresponding PDCCH. Assume that the ACK / NACK response messages of the two subframes on the PCell are {ACK, NACK} respectively, and the ACK / NACK response messages of the two subframes of the SCell are {ACK, ACK} respectively; since the PCell does not conta...

Embodiment 2

[0132] Embodiment 2 [feedback mode determination method 1, feedback mode 1, M=3]

[0133] Such as Figure 11As shown, assuming that the current base station configures two downlink serving cells for the UE, namely the primary downlink serving cell (PCell) and the secondary downlink serving cell (SCell), the current uplink subframe needs to feed back M=3 downlink subframe ACK / For a NACK response message, when the PDSCH of the downlink subframe corresponds to two response messages, perform a logical AND operation on the two response messages and then perform a sorting operation. It is assumed that the PDSCH scheduling of the SCell does not use cross-carrier scheduling, and the PDSCH scheduling of each downlink subframe includes a corresponding PDCCH. Assume that the ACK / NACK response messages of the three subframes on the PCell are {ACK, ACK, NACK} respectively, and the ACK / NACK response messages of the three subframes of the SCell are {ACK, NACK, ACK} respectively; since the ...

Embodiment 3

[0144] Embodiment 3 [feedback mode determination method 1, feedback mode 1, M=4]

[0145] Such as Figure 13 As shown, assuming that the current base station configures two downlink serving cells for the UE, namely the primary downlink serving cell (PCell) and the secondary downlink serving cell (SCell), the current uplink subframe needs to feed back M=4 downlink subframes ACK / For a NACK response message, when the PDSCH of the downlink subframe corresponds to two response messages, perform a logical AND operation on the two response messages and then perform a sorting operation. It is assumed that the PDSCH scheduling of the SCell does not use cross-carrier scheduling, and the PDSCH scheduling of each downlink subframe includes a corresponding PDCCH. Suppose the ACK / NACK response messages of the 4 subframes on the PCell are {ACK, ACK, DTX, ACK}, and the ACK / NACK response messages of the 4 subframes of the SCell are {ACK, ACK, ACK, ACK}; Contains SPS subframes, and according...

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Abstract

The invention discloses a transmitting method for acknowledgment / negative acknowledgment (ACK / NACK) in a time division duplex (TDD) system and a user terminal, and is used for feeding back the ACK / NACK of various downlink service cells and downlink subframes through user equipment (UE) in a physical uplink control channel (PUCCH)-format 1b combined channel selection mode in the TDD system. When the number of downlink subframes contained in a downlink subframe window corresponding to an uplink subframe is more than 1, a feedback mode when the UE adopts a format 1b combined channel to selectively feed back the ACK / NACK is determined according to a high-layer signaling configuration mode or according to whether the UE receives a judged result of a physical downlink shared channel (PDSCH) from an auxiliary downlink service cell. In the feedback mode 1, the UE adopts a mapping table defined by long-term evolution-A; hybrid automatic repeat request acknowledgment (HARQ-ACK) in the mapping table is generated by employing a time domain bundling mode; and corresponding PUCCH channel resources in the mapping table are determined by employing a preset PUCCH resource determining method.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for sending correct / error acknowledgment (ACK / NACK) messages in a time division duplex system using carrier aggregation technology and a user terminal. Background technique [0002] In the hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat Request) mode, the codeword sent by the originator can not only detect errors, but also have certain error correction capabilities. After receiving the codeword, the decoder at the receiving end first checks the error situation. If it is within the error correction capability of the codeword, it will automatically correct the error. If there are too many errors, it exceeds the error correction capability of the codeword, but it can detect the error. , the receiving end sends a decision signal to the sending end through the feedback channel, requesting the sending end to resend the information. In an Orthogonal Frequency D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
CPCH04L1/1614H04L1/1861H04L1/1893H04L5/001H04L5/0055H04L5/1469
Inventor 梁春丽戴博杨维维任璐
Owner ZTE CORP
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