Method and apparatus for transmitting and receiving wireless signal in wireless communication system

Patent metadata

Field	Value
Publication number	US-11043993-B2
Application number	US-201816318671-A
Country	US
Kind code	B2
Filing date	Sep 10, 2018
Priority date	Sep 8, 2017
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method including receiving only one downlink signal in a set of slots; generating an acknowledgement/negative acknowledgement (A/N) codebook for the one or more downlink signals; and transmitting the A/N codebook, wherein if a specific condition is satisfied, the A/N codebook includes only A/N information for the one downlink signal, and an apparatus therefor.

First claim

The invention claimed is:

1. A method of performing communication by a user equipment (UE) in a wireless communication system, the method comprising:
receiving only one downlink signal in a set of slots;
generating an acknowledgement/negative acknowledgement (A/N) codebook for one or more downlink signals; and
transmitting the A/N codebook,
wherein if the following conditions 1) to 3) are satisfied, the A/N codebook is generated for only the one downlink signal,
1) an A/N codebook configuration scheme is set as a semi-static A/N codebook,
2) the one downlink signal is received in a primary cell (PCell), and
3) the one downlink signal is scheduled by a first downlink control information (DCI) format of at least two DCI formats, and a specific field of the first DCI format has a first value, and
wherein a field configuration of the first DCI format is same when the A/N codebook configuration scheme is dynamic and when the A/N codebook configuration scheme is semi-static.

2. The method according to claim 1 , wherein if the A/N codebook configuration scheme is dynamic, the specific field of the first DCI format indicates a counter-downlink assignment index (c-DAI) value.

3. The method according to claim 1 , wherein the one downlink signal includes (i) a physical downlink shared channel (PDSCH) or (ii) a physical downlink control channel (PDCCH) indicating semi-persistent scheduling (SPS) PDSCH release.

4. The method according to claim 1 , wherein if the one downlink signal is scheduled by a second DCI format of the at least two DCI formats, the A/N codebook includes maximum A/N information based on the number of slots included in the slot set, the second DCI format includes a c-DAI field when the A/N codebook configuration scheme is dynamic or no c-DAI field when the A/N codebook configuration scheme is semi-static, and the slot set includes a plurality of slots.

5. The method according to claim 1 , wherein if the A/N codebook is transmitted on a physical uplink shared channel (PUSCH), the following additional condition 4) must be satisfied for the A/N codebook to be generated for only the one downlink signal,
4) the PUSCH is scheduled by an uplink (UL) grant DCI including a DAI field, and the DAI field has a second value.

6. The method according to claim 1 , wherein the field configuration of a second DCI format, of the at least two DC formats, includes the specific field when the A/N codebook configuration scheme is dynamic, and does not include the specific field when the A/N codebook configuration scheme is semi-static.

7. A user equipment (UE) in a wireless communication system, the UE comprising:
a radio frequency (RF) module; and
a processor,
wherein the processor is configured to receive only one downlink signal in a set of slots, generate an acknowledgement/negative acknowledgement (A/N) codebook for one or more downlink signals, and transmit the A/N codebook,
wherein if the following conditions 1) to 3) are satisfied, the A/N codebook is generated for only the one downlink signal,
1) an A/N codebook configuration scheme is set as a semi-static A/N codebook,
2) the one downlink signal is received in a primary cell (PCell), and
3) the one downlink signal is scheduled by a first downlink control information (DCI) format of at least two DCI formats, and a specific field of the first DCI format has a first value, and
wherein a field configuration of the first DCI format is same when the A/N codebook configuration scheme is dynamic and when the A/N codebook configuration scheme is semi-static.

8. The UE according to claim 7 , wherein if the A/N codebook configuration scheme is dynamic, the specific field of the first DCI format indicates a counter-downlink assignment index (c DAI) value.

9. The UE according to claim 7 , wherein the one downlink signal includes (i) a physical downlink shared channel (PDSCH) or (ii) a physical downlink control channel (PDCCH) indicating semi-persistent scheduling (SPS) PDSCH release.

10. The UE according to claim 7 , wherein if the one downlink signal is scheduled by a second DCI format of the at least two DCI formats, the A/N codebook includes maximum A/N information based on the number of slots included in the slot set, the second DCI format includes a c-DAI field when the A/N codebook configuration scheme is dynamic or no c-DAI field when the A/N codebook configuration scheme is semi-static, and the slot set includes a plurality of slots.

11. The UE according to claim 6 , wherein if the A/N codebook is transmitted on a physical uplink shared channel (PUSCH), the following additional condition 4) must be satisfied for the A/N codebook to be generated for only the one downlink signal,
4) the PUSCH is scheduled by an uplink (UL) grant DCI including a DAI field, and the DAI field has a second value.

12. The UE according to claim 7 , wherein the field configuration of a second DCI format, of the at least two DC formats, includes the specific field when the A/N codebook configuration scheme is dynamic, and does not include the specific field when the A/N codebook configuration scheme is semi-static.

13. A base station (BS) in a wireless communication system, the BS comprising:
a radio frequency (RF) module; and
a processor,
wherein the processor is configured to transmit only one downlink signal in a set of slots, receive an acknowledgement/negative acknowledgement (A/N) codebook for one or more downlink signals, and process the A/N codebook,
wherein if the following conditions 1) to 3) are satisfied, the A/N codebook is generated for only the one downlink signal,
1) an A/N codebook configuration scheme is set as a semi-static A/N codebook,
2) the one downlink signal is received in a primary cell (PCell), and
3) the one downlink signal is scheduled by a first downlink control information (DCI) format of at least two DCI formats, and a specific field of the first DCI format has a first value, and
wherein a field configuration of the first DCI format is same when the A/N codebook configuration scheme is dynamic and when the A/N codebook configuration scheme is semi-static.

14. The BS according to claim 13 , wherein if the A/N codebook configuration scheme is dynamic, the specific field of the first DCI format indicated a counter-downlink assignment index (c DAI) value.

15. The BS according to claim 13 , wherein the one downlink signal includes (i) a physical downlink shared channel (PDSCH) or (ii) a physical downlink control channel (PDCCH) indicating semi-persistent scheduling (SPS) PDSCH release.

16. The BS according to claim 13 , wherein if the one downlink signal is scheduled by a second DCI format of the at least two DCI formats, the A/N codebook includes maximum A/N information based on the number of slots included in the slot set, the second DCI format includes a c-DAI field when the A/N codebook configuration scheme is dynamic or no c-DAI field when the A/N codebook configuration scheme is semi-static, and the slot set includes a plurality of slots.

17. The BS according to claim 13 , wherein if the A/N codebook is transmitted on a physical uplink shared channel (PUSCH), the following additional condition 4) must be satisfied for the A/N codebook to be generated for only the one downlink signal,
4) the PUSCH is scheduled by an uplink (UL) grant DCI including a DAI field, and the DAI field has a second value.

18. The BS according to claim 13 , wherein the field configuration of a second DCI format, of the at least two DC formats, includes the specific field when the A/N codebook configuration sc

Assignees

• Lg Electronics Inc

Inventors

• Yang Suckchel
• Ahn Joonkui
• Kim Seonwook
• Park Hanjun

Classifications

• H04W72/53

  based on regulatory allocation policies · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04B7/0456 Primary

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04W76/30

  Connection release · CPC title

• H04L1/1819

  with retransmission of additional or different redundancy · CPC title