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

• US 20200137737A1
• 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 11,140,015 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 downlink control information (DCI) through a UE group common-physical downlink control channel (PDCCH);

obtaining, from the DCI, second information regarding a slot format related to the reference SCS; and

based on a first SCS used by the UE being different from the reference SCS, applying the slot format to a plurality of slots of the first SCS,

wherein the plurality of the slots of the first SCS are related to a slot of the reference SCS, and

wherein in case of applying the slot format to the plurality of the slots of the first SCS, each of a plurality of symbols included in the slot of the reference SCS is determined to be related to one of downlink (D), uplink (U) or flexible (X).

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

3. The method of claim 1, wherein the reference SCS is less than the first SCS, and

wherein a time duration of one slot of the reference SCS is greater than a time duration of each of the plurality of slots of the first SCS.

4. The method of claim 3, wherein the first SCS is M times the reference SCS,

wherein the plurality of slots of the first SCS comprises M consecutive slots of the first SCS that are related to the slot of the reference SCS, and

wherein M is a natural number.

5. The method of claim 4, wherein in case of applying the slot format to the plurality of the slots of the first SCS, M consecutive symbols of the first SCS is determined to be related to one of D, U, or X,

wherein the symbol of the reference SCS is related to the M consecutive symbols of the first SCS.

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

7. The method of claim 6, 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.

8. The method of claim 7,

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.

9. The method of claim 6, 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.

10. 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 a first SCS used by the UE being different from the reference SCS, the slot format is applied to a plurality of slots of the first SCS,

wherein the plurality of the slots of the first SCS are related to a slot of the reference SCS, and

wherein in case of the slot format applied to the plurality of the slots of the first SCS, each of a plurality of symbols included in the slot of the reference SCS is determined to be related to one of downlink (D), uplink (U) or flexible (X).

11. 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 downlink control information (DCI) through a UE group common-physical downlink control channel (PDCCH);

obtain, from the DCI, second information regarding a slot format related to the reference SCS; and

based on a first SCS used by the UE being different from the reference SCS, apply the slot format to a plurality of slots of the first SCS,

wherein the plurality of the slots of the first SCS are related to a slot of the reference SCS, and

wherein in case of applying the slot format to the plurality of the slots of the first SCS, each of a plurality of symbols included in the slot of the reference SCS is determined to be related to one of downlink (D), uplink (U) or flexible (X).

12. 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 a first SCS used by the UE being different from the reference SCS, the slot format is applied to a plurality of slots of the first SCS,

wherein the plurality of the slots of the first SCS are related to a slot of the reference SCS, and

wherein in case of the slot format applied to the plurality of the slots of the first SCS, each of a plurality of symbols included in the slot of the reference SCS is determined to be related to one of downlink (D), uplink (U) or flexible (X).