IP Library › Granted Patent US 12713429
Granted Patent B2
US 12713429 · App. 18/432,902 · Granted Aug 18, 2026

Feedback information transmission method and related apparatus

Inventors: Tong Su (Shenzhen, CN); Shengyu Li (Beijing, CN); Lei Guan (Beijing, CN); Ruijie Li (Beijing, CN); Yang Ding (Shenzhen, CN)
Assignee: Huawei Technologies Co., Ltd.
H04W72/1273H04L1/1812H04L27/26025H04W72/21H04W72/232
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Quick Facts
Patent No.
US 12713429
App. No.
18/432,902
Granted
Aug 18, 2026
Kind
B2
Abstract

This application provides a feedback information transmission method and a related apparatus. When the first PUCCH resource overlaps the downlink symbol or the flexible symbol in time domain, the terminal device may switch the HARQ feedback information to another time unit for sending. This resolves low data transmission reliability because the HARQ feedback information cannot be sent and is discarded when the first PUCCH resource overlaps the downlink symbol or the flexible symbol.

Claims (72)

1 . A method, wherein the method comprises:

receiving first configuration information, wherein the first configuration information indicates a one-to-one correspondence between M reference time units and a plurality of cells configured to send hybrid automatic repeat request (HARQ) feedback information in the M reference time units, and M is a positive integer;

receiving a physical downlink shared channel (PDSCH), wherein an end symbol of the PDSCH is located in a first reference time unit in the M reference time units;

determining a second reference time unit in the M reference time units based on the first reference time unit, wherein the second reference time unit is after the first reference time unit, the second reference time unit and the first reference time unit are separated by K1 reference time units, and K1 is an integer greater than or equal to o;

determining a first time unit in a first cell based on the second reference time unit and the one-to-one correspondence, wherein the first cell corresponds to the second reference time unit in the one-to-one correspondence, and the first time unit in the first cell overlaps the second reference time unit in the time domain;

determining a second time unit when a first physical uplink control channel (PUCCH) resource overlaps a downlink symbol or a flexible symbol in the time domain, wherein the second time unit is after the first time unit, and the first PUCCH resource is in the first cell, is located in the first time unit, and is configured to carry HARQ feedback information of the PDSCH; and

sending the HARQ feedback information of the PDSCH on a second PUCCH resource in the second time unit, wherein the second PUCCH resource does not overlap any downlink symbol or any flexible symbol in the time domain.

2 . The method according to claim 1 , wherein the second time unit is in a second cell; and

wherein the second cell corresponds to a third reference time unit in the M reference time units in the one-to-one correspondence, the second time unit is in the second cell and overlaps the third reference time unit in the time domain, and the third reference time unit is an earliest available reference time unit in the time domain in at least one available reference time unit; and each of the at least one available reference time unit is after the second reference time unit, a cell corresponding to each available reference time unit in the one-to-one correspondence is an available candidate cell, a candidate PUCCH resource in a third time unit in the available candidate cell does not overlap any downlink symbol or any flexible symbol, and the third time unit is in the available candidate cell and overlaps a reference time unit in the time domain corresponding to the available candidate cell in the one-to-one correspondence; or

wherein the second cell is a primary cell (PCell) or the first cell, the second time unit is an earliest available time unit in the time domain in at least one available time unit in the second cell, and a corresponding candidate PUCCH resource in each of the at least one available time unit does not overlap any downlink symbol or any flexible symbol, wherein the corresponding candidate PUCCH resource is configured to carry the HARQ feedback information.

3 . The method according to claim 2 , wherein there are a plurality of time units in the second cell that overlap the third reference time unit in the time domain, the second time unit is at a foremost time domain location of the plurality of time units in the second cell that overlap the third reference time unit in the time domain.

4 . The method according to claim 1 , wherein:

time domain lengths of the M reference time units are the same, the time domain lengths of the M reference time units are determined based on a first subcarrier spacing, and the first subcarrier spacing is: a largest subcarrier spacing in subcarrier spacings corresponding to the plurality of cells, or a smallest subcarrier spacing in the subcarrier spacings corresponding to the plurality of cells.

5 . The method according to claim 1 , wherein:

K1 is indicated by downlink control information (DCI) for scheduling the PDSCH, and K1 is a value in a K1 set.

6 . The method according to claim 5 , wherein:

the K1 set is configured for a cell in which the PDSCH is located;

the K1 set is configured for a carrier of a PCell accessed by a terminal device in the plurality of cells;

the K1 set is configured for a carrier with a smallest subcarrier spacing in the plurality of cells; or

the K1 set is configured for a carrier with a largest subcarrier spacing in the plurality of cells.

7 . A method, wherein the method comprises:

sending first configuration information, wherein the first configuration information indicates a one-to-one correspondence between M reference time units and a plurality of cells configured to send hybrid automatic repeat request (HARQ) feedback information in the M reference time units, and M is a positive integer;

sending a physical downlink shared channel (PDSCH), wherein an end symbol of the PDSCH is located in a first reference time unit in the M reference time units;

determining a second reference time unit in the M reference time units based on the first reference time unit, wherein the second reference time unit is after the first reference time unit, the second reference time unit and the first reference time unit are separated by K1 reference time units, and K1 is an integer greater than or equal to o;

determining a first time unit in a first cell based on the second reference time unit and the one-to-one correspondence, wherein the first cell corresponds to the second reference time unit in the one-to-one correspondence, and the first time unit is in the first cell and overlaps the second reference time unit in the time domain;

determining a second time unit when a first physical uplink control channel (PUCCH) resource overlaps a downlink symbol or a flexible symbol in the time domain, wherein the second time unit is after the first time unit, and the first PUCCH resource is in the first cell, is located in the first time unit, and is configured to carry HARQ feedback information of the PDSCH; and

receiving the HARQ feedback information of the PDSCH on a second PUCCH resource in the second time unit, wherein the second PUCCH resource does not overlap any downlink symbol or any flexible symbol in the time domain.

8 . The method according to claim 7 , wherein the second time unit is in a second cell; and

wherein the second cell corresponds to a third reference time unit in the M reference time units in the one-to-one correspondence, the second time unit is in the second cell and overlaps the third reference time unit in the time domain, and the third reference time unit is an earliest available reference time unit in the time domain in at least one available reference time unit; and each of the at least one available reference time unit is after the second reference time unit, a cell corresponding to each available reference time unit in the one-to-one correspondence is an available candidate cell, a candidate PUCCH resource in a third time unit in the available candidate cell does not overlap any downlink symbol or any flexible symbol, and the third time unit is in the available candidate cell and overlaps a reference time unit in the time domain corresponding to the available candidate cell in the one-to-one correspondence; or

wherein the second cell is a primary cell (PCell) or the first cell, the second time unit is an earliest available time unit in the time domain in at least one available time unit in the second cell, and a corresponding candidate PUCCH resource in each of the at least one available time unit does not overlap any downlink symbol or any flexible symbol, wherein the corresponding candidate PUCCH resource is configured to carry the HARQ feedback information.

9 . The method according to claim 8 , wherein there are a plurality of time units in the second cell that overlap the third reference time unit in the time domain, the second time unit is at a foremost time domain location of the plurality of time units in the second cell that overlap the third reference time unit in the time domain.

10 . The method according to claim 7 , wherein:

time domain lengths of the M reference time units are the same, the time domain lengths of the M reference time units are determined based on a first subcarrier spacing, and the first subcarrier spacing is: a largest subcarrier spacing in subcarrier spacings corresponding to the plurality of cells, or a smallest subcarrier spacing in the subcarrier spacings corresponding to the plurality of cells.

11 . The method according to claim 7 , wherein:

K1 is indicated by downlink control information (DCI) for scheduling the PDSCH, and K1 is a value in a K1 set.

12 . The method according to claim 11 , wherein:

the K1 set is configured for a cell in which the PDSCH is located;

the K1 set is configured for a carrier of a PCell accessed by a terminal device in the plurality of cells;

the K1 set is configured for a carrier with a smallest subcarrier spacing in the plurality of cells; or

the K1 set is configured for a carrier with a largest subcarrier spacing in the plurality of cells.

13 . A communication apparatus, comprising:

one or more processors, wherein the one or more processors processors are configured to execute operations comprising:

receiving first configuration information, wherein the first configuration information indicates a one-to-one correspondence between M reference time units and a plurality of cells configured to send hybrid automatic repeat request (HARQ) feedback information in the M reference time units, and M is a positive integer;

receiving a physical downlink shared channel (PDSCH), wherein an end symbol of the PDSCH is located in a first reference time unit in the M reference time units;

determining a second reference time unit in the M reference time units based on the first reference time unit, wherein the second reference time unit is after the first reference time unit, the second reference time unit and the first reference time unit are separated by K1 reference time units, and K1 is an integer greater than or equal to o;

determining a first time unit in a first cell based on the second reference time unit and the one-to-one correspondence, wherein the first cell corresponds to the second reference time unit in the one-to-one correspondence, and the first time unit is in the first cell and overlaps the second reference time unit in the time domain;

determining a second time unit when a first physical uplink control channel (PUCCH) resource overlaps a downlink symbol or a flexible symbol in the time domain, wherein the second time unit is after the first time unit, and the first PUCCH resource is in the first cell, is located in the first time unit, and is configured to carry HARQ feedback information of the PDSCH; and

sending the HARQ feedback information of the PDSCH on a second PUCCH resource in the second time unit, wherein the second PUCCH resource does not overlap any downlink symbol or any flexible symbol in the time domain.

14 . The communication apparatus according to claim 13 , wherein the second time unit is in a second cell; and

wherein the second cell corresponds to a third reference time unit in the M reference time units in the one-to-one correspondence, the second time unit is in the second cell and overlaps the third reference time unit in the time domain, and the third reference time unit is an earliest available reference time unit in the time domain in at least one available reference time unit; and each of the at least one available reference time unit is after the second reference time unit, a cell corresponding to each available reference time unit in the one-to-one correspondence is an available candidate cell, a candidate PUCCH resource in a third time unit in the available candidate cell does not overlap any downlink symbol or any flexible symbol, and the third time unit is in the available candidate cell and overlaps a reference time unit in the time domain corresponding to the available candidate cell in the one-to-one correspondence; or

wherein the second cell is a primary cell (PCell) or the first cell, the second time unit is an earliest available time unit in the time domain in at least one available time unit in the second cell, and a corresponding candidate PUCCH resource in each of the at least one available time unit does not overlap any downlink symbol or any flexible symbol, wherein the corresponding candidate PUCCH resource is configured to carry the HARQ feedback information.

15 . The communication apparatus according to claim 14 , wherein there are a plurality of time units in the second cell that overlap the third reference time unit in the time domain, the second time unit is at a foremost time domain location of the plurality of time units in the second cell that overlap the third reference time unit in the time domain.

16 . The communication apparatus according to claim 13 , wherein:

time domain lengths of the M reference time units are the same, the time domain lengths of the M reference time units are determined based on a first subcarrier spacing, and the first subcarrier spacing is: a largest subcarrier spacing in subcarrier spacings corresponding to the plurality of cells, or a smallest subcarrier spacing in the subcarrier spacings corresponding to the plurality of cells.

17 . The communication apparatus according to claim 13 , wherein

K1 is indicated by downlink control information (DCI) for scheduling the PDSCH, and K1 is a value in a K1 set.

18 . The communication apparatus according to claim 17 , wherein

the K1 set is configured for a cell in which the PDSCH is located;

the K1 set is configured for a carrier of a PCell accessed by a terminal device in the plurality of cells;

the K1 set is configured for a carrier with a smallest subcarrier spacing in the plurality of cells; or

the K1 set is configured for a carrier with a largest subcarrier spacing in the plurality of cells.

19 . A communication apparatus, comprising:

one or more processors, wherein the one or more processors are configured to execute operations comprising:

sending first configuration information, wherein the first configuration information indicates a one-to-one correspondence between M reference time units and a plurality of cells configured to send hybrid automatic repeat request (HARQ) feedback information in the M reference time units, and M is a positive integer;

sending a physical downlink shared channel (PDSCH), wherein an end symbol of the PDSCH is located in a first reference time unit in the M reference time units;

determining a second reference time unit in the M reference time units based on the first reference time unit, wherein the second reference time unit is after the first reference time unit, the second reference time unit and the first reference time unit are separated by K1 reference time units, and K1 is an integer greater than or equal to o;

determining a first time unit in a first cell based on the second reference time unit and the one-to-one correspondence, wherein the first cell corresponds to the second reference time unit in the one-to-one correspondence, and the first time unit is in the first cell and overlaps the second reference time unit in the time domain;

determining a second time unit when a first physical uplink control channel (PUCCH) resource overlaps a downlink symbol or a flexible symbol in the time domain, wherein the second time unit is after the first time unit, and the first PUCCH resource is in the first cell, is located in the first time unit, and is configured to carry HARQ feedback information of the PDSCH; and

receiving the HARQ feedback information of the PDSCH on a second PUCCH resource in the second time unit, wherein the second PUCCH resource does not overlap any downlink symbol or any flexible symbol in the time domain.

20 . The communication apparatus according to claim 19 , wherein the second time unit is in a second cell; and

wherein the second cell corresponds to a third reference time unit in the M reference time units in the one-to-one correspondence, the second time unit is in the second cell and overlaps the third reference time unit in the time domain, and the third reference time unit is an earliest available reference time unit in the time domain in at least one available reference time unit; and each of the at least one available reference time unit is after the second reference time unit, a cell corresponding to each available reference time unit in the one-to-one correspondence is an available candidate cell, a candidate PUCCH resource in a third time unit in the available candidate cell does not overlap any downlink symbol or any flexible symbol, and the third time unit is in the available candidate cell and overlaps a reference time unit in the time domain corresponding to the available candidate cell in the one-to-one correspondence; or

wherein the second cell is a primary cell (PCell) or the first cell, the second time unit is an earliest available time unit in the time domain in at least one available time unit in the second cell, and a corresponding candidate PUCCH resource in each of the at least one available time unit does not overlap any downlink symbol or any flexible symbol, wherein the corresponding candidate PUCCH resource is configured to carry the HARQ feedback information.