METHOD FOR TRANSMITTING OR RECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

• US 20200136882A1
• Filed: 12/30/2019
• Published: 04/30/2020
• Est. Priority Date: 03/24/2017
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: JO, Soonki, YI, Yunjung, SEO, Inkwon
• Granted Patent: US 11,296,918 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• CPC Class Codes: H04L 27/2666 Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method for receiving, by a terminal, downlink control information in a wireless communication system according to one embodiment of the present invention comprises the steps of: receiving information on a reference subcarrier spacing (SCS) from among a plurality of SCS numerologies; receiving downlink control information through a terminal group common physical downlink control channel (PDCCH); and obtaining information on a slot format from the downlink control information, wherein the downlink control information indicates the slot format on the basis of the reference SCS, and when the SCS of the terminal is different from the reference SCS, the terminal may convert the slot format of the reference SCS according to the SCS of the terminal.

Claims

1. A method for a user equipment (UE) in a wireless communication system, the method comprising:

receiving first information regarding a reference subcarrier spacing (SCS);

receiving, through a UE group common-physical downlink control channel (PDCCH), downlink control information (DCI) that comprises second information regarding a slot format related to the reference SCS; and

based on the reference SCS being equal or less than a first SCS used by the UE, applying the slot format to a certain number of slots of the first SCS,

wherein the certain number of the slots are related to a slot of the reference SCS.

2. The method of claim 1, wherein the first information is received through a higher layer signaling.

3. The method of claim 1, wherein a time duration of one slot of the reference SCS is equal or greater than a time duration of each of the certain number of the slots of the first SCS.

4. The method of claim 1, wherein the certain number is determined based on differences between the reference SCS and the first SCS.

5. The method of claim 1, wherein the certain number of the slots of the first SCS comprises the certain number of consecutive slots of the first SCS related to the slot of the reference SCS.

6. The method of claim 5, wherein the slot of the reference SCS comprises a first plurality of symbols,

wherein each of the certain number of the slots of the first SCS comprises a second plurality of symbols,

wherein the certain number of consecutive symbols of the first SCS are related to one symbol of the reference SCS, and

wherein applying the slot format comprises, for each of the first plurality of symbols in the slot of the reference SCS:

determining, based on the second information, that the symbol of the reference SCS is related to one of downlink (D), uplink (U), or flexible (X); and

determining that the certain number of the consecutive symbols of the first SCS are related to one of D, U, or X.

7. The method of claim 1, wherein the second information comprises information on at least one slot format combination configured in the UE.

8. The method of claim 7, wherein the UE is configured with a plurality of frequency bands;

and

wherein each of the at least one slot format combination comprises a plurality of slot formats for the plurality of frequency bands.

9. The method of claim 8,

wherein each of the at least one slot format combination comprises (i) a slot format for a downlink (DL) frequency band, and (ii) a slot format for an uplink (UL) frequency band, or

wherein each of the at least one slot format combination comprises (i) a slot format for a new radio access technology (NR) frequency band, and (ii) a slot format for a long-term evolution (LTE) frequency band.

10. The method of claim 7, wherein the information on the at least one slot formation combination is received through a higher layer signaling, and

wherein the at least one slot formation combination is a subset of a plurality of slot format combinations supported in the wireless communication system.

11. A method for a base station (BS) in a wireless communication system, the method comprising:

transmitting, to a user equipment (UE), first information regarding a reference subcarrier spacing (SCS); and

transmitting, to a UE group comprising the UE through a UE group common-physical downlink control channel (PDCCH), downlink control information (DCI) that comprises second information regarding a slot format related to the reference SCS;

wherein based on the reference SCS being equal or less than a first SCS used by the UE, the slot format is related to a certain number of slots of the first SCS, and

wherein the certain number of the slots are related to a slot of the reference SCS.

12. A user equipment (UE) in a wireless communication system, the UE comprising:

a memory; and

at least one processor coupled with the memory,

wherein the at least one processor is configured to;

receive first information regarding a reference subcarrier spacing (SCS);

receive, through a UE group common-physical downlink control channel (PDCCH), downlink control information (DCI) that comprises second information regarding a slot format related to the reference SCS; and

based on the reference SCS being equal or less than a first SCS used by the UE, apply the slot format to a certain number of slots of the first SCS,

wherein the certain number of the slots are related to a slot of the reference SCS.

13. A base station (BS) in a wireless communication system, the BS comprising:

a memory; and

at least one processor coupled with the memory,

wherein the at least one processor is configured to;

transmit, to a user equipment (UE), first information regarding a reference subcarrier spacing (SCS); and

transmit, to a UE group comprising the UE through a UE group common-physical downlink control channel (PDCCH), downlink control information (DCI) that comprises second information regarding a slot format related to the reference SCS;

wherein based on the reference SCS being equal or less than a first SCS used by the UE, the slot format is related to a certain number of slots of the first SCS, and

wherein the certain number of the slots are related to a slot of the reference SCS.