Method for configuring and scheduling partial subframe in wireless access system supporting unlicensed band, and device for supporting same

• US 10,708,932 B2
• Filed: 04/15/2019
• Issued: 07/07/2020
• Est. Priority Date: 12/23/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Seonwook, Ahn, Joonkui, Lee, Seungmin, Kim, Kijun, Yang, Suckchel, Seo, Hanbyul, Park, Jonghyun, You, Hyangsun
• Primary Examiner(s): Elliott, IV, Benjamin H
• Application Number:
  US16/384,207
• Publication Number:
  US 20190246409A1
• Time in Patent Office: 449 Days
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0689 using different transmission schemes, at least one of them being a diversity transmission scheme
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 41/064 involving time analysis
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 47/74 measures in reaction to resource unavailability
• CPC Class Codes: H04L 47/826 Involving periods of time
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• 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 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/04 : Wireless resource allocation
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 : Wireless traffic scheduling
• CPC Class Codes: H04W 72/1215 : for collaboration of different radio technologies
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0808 : using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Abstract

A method for receiving a signal by a user equipment (UE) in a wireless communication system is discussed. The method includes receiving, from a base station (BS), control information; and receiving, from the BS, downlink data on an unlicensed band cell (UCell) based on the control information. Further, in case of: the control information received on another serving cell, the downlink data is received in a first time resource, and the control information received on the UCell, the downlink data is received in a second time resource, and the second time resource is smaller than the first time resource.

Claims

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

receiving, from a base station (BS), downlink control information (DCI) by monitoring a physical downlink control channel (PDCCH); and

receiving, from the BS, downlink data in an unlicensed band cell (UCell) based on the DCI,

wherein i) based on being configured to monitor the PDCCH on the Ucell, the downlink data is received starting in at least one of a first time resource or a second time resource,

wherein ii) based on being configured to monitor the PDCCH on another serving cell, the downlink data is received starting in the second time resource and the UE is not expected to be scheduled with the downlink data starting in the first time resource,

wherein the first time resource is configured as a first number of orthogonal frequency divisional multiplexing (OFDM) symbols,

wherein the second time resource is configured as 14 number of OFDM symbols, and

wherein the first number is less than 14.

2. The method of claim 1, wherein the another serving cell is a cell configured in a licensed band.

3. The method of claim 1, wherein the downlink data is configured in the first time resource and a certain number of second time resources, and

wherein each of the certain number of the second time resources is configured as 14 number of OFDM symbols.

4. The method of claim 1, wherein the DCI is received based on a pre-scheduling scheme, and

wherein the pre-scheduling scheme denotes a scheme to transmit the DCI earlier than the downlink data.

5. The method of claim 1, wherein a starting time of the downlink data is determined based on a starting position or size of the first time resource.

6. The method of claim 1, wherein based on that the UE is configured to detect, by monitoring, the PDCCH starting in the first time resource configured as 7 consecutive OFDM symbols, the UE is configured to assume that (i) all of the 7 consecutive OFDM symbols are occupied and (ii) 7 consecutive OFDM symbols immediately before the first time resource are unoccupied.

7. A device for receiving a signal in a wireless communication system, the device comprising:

a memory; and

at least one processor coupled with the memory and configured to;

receive, from a base station (BS), downlink control information (DCI) by monitoring a physical downlink control channel (PDCCH); and

receive, from the BS, downlink data in an unlicensed band cell (UCell) based on the DCI,

wherein i) based on being configured to monitor the PDCCH on the Ucell, the downlink data is received starting in at least one of a first time resource or a second time resource,

wherein ii) based on being configured to monitor the PDCCH on another serving cell, the downlink data is received starting in the second time resource and the UE is not expected to be scheduled with the downlink data starting in the first time resource,

wherein the first time resource is configured as a first number of orthogonal frequency divisional multiplexing (OFDM) symbols,

wherein the second time resource is configured as 14 number of OFDM symbols, and

wherein the first number is less than 14.

8. The device of claim 7, wherein the another serving cell is a cell configured in a licensed band.

9. The device of claim 7, wherein the downlink data is configured in the first time resource and a certain number of second time resources, and

wherein each of the certain number of the second time resources is configured as 14 number of OFDM symbols.

10. The device of claim 7, wherein the DCI is received based on a pre-scheduling scheme, and

wherein the pre-scheduling scheme denotes a scheme to transmit the DCI earlier than the downlink data.

11. The device of claim 7, wherein a starting time of the downlink data is determined based on a starting position or size of the first time resource.

12. A method for transmitting a signal by a base station (BS) in a wireless communication system, the method comprising:

transmitting, to a user equipment (UE), a physical downlink control channel (PDCCH) carrying downlink control information (DCI); and

transmitting, to the UE, downlink data in an unlicensed band cell (UCell) based on the DCI,

wherein i) based on the UE being configured to monitor the PDCCH on the Ucell, the downlink data is transmitted starting in at least one of a first time resource or a second time resource,

wherein ii) based on the UE being configured to monitor the PDCCH on another serving cell, the downlink data is transmitted starting in the second time resource and the downlink data starting in the first time resource is not scheduled to the UE,

wherein the first time resource is configured as a first number of orthogonal frequency divisional multiplexing (OFDM) symbols,

wherein the second time resource is configured as 14 number of OFDM symbols, and

wherein the first number is less than 14.

13. The method of claim 12, wherein the another serving cell is a cell configured in a licensed band.

14. The method of claim 12, wherein a starting time of the downlink data is determined based on a starting position or size of the first time resource.

15. A device for transmitting a signal in a wireless communication system, the device comprising:

a memory; and

at least one processor coupled with the memory and configured to;

transmit, to a user equipment (UE), a physical downlink control channel (PDCCH) carrying downlink control information (DCI); and

transmit, to the UE, downlink data in an unlicensed band cell (UCell) based on the DCI,

wherein i) based on the UE being configured to monitor the PDCCH on the Ucell, the downlink data is transmitted starting in at least one of a first time resource or a second time resource,

wherein ii) based on the UE being configured to monitor the PDCCH on another serving cell, the downlink data is transmitted starting in the second time resource and the downlink data starting in the first time resource is not scheduled to the UE,

wherein the first time resource is configured as a first number of orthogonal frequency divisional multiplexing (OFDM) symbols,

wherein the second time resource is configured as 14 number of OFDM symbols, and wherein the first number is less than 14.

16. The device of claim 15, wherein the another serving cell is a cell configured in a licensed band.

17. The device of claim 15, wherein a starting time of the downlink data is determined based on a starting position or size of the first time resource.