METHOD AND APPARATUS FOR DETERMINING TDD UL-DL CONFIGURATION APPLICABLE FOR RADIO FRAMES

• US 20200137824A1
• Filed: 12/23/2019
• Published: 04/30/2020
• Est. Priority Date: 07/06/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ingale, Mangesh Abhimanyu, Baghel, Sudhir Kumar, Kim, Soeng-Hun
• Granted Patent: US 11,172,534 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/2615 using hybrid frequency-time division multiple access [FDMA-TDMA]
• CPC Class Codes: H04L 5/1476 operating bitwise
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Abstract

A method and an apparatus are provided for monitoring a physical downlink control channel (PDCCH) by a user equipment (UE) in a wireless communication system. The UE receives a system information block (SIB) from a network. The UE identifies at least one downlink (DL) period based on a first time division duplex (TDD) uplink (UL)/DL configuration included in the SIB; monitoring, by the UE, the PDCCH during the at least one DL period using a discontinuous reception (DRX) operation. The UE obtains information about at least one second TDD UL/DL configuration for one or more time intervals from the monitored PDCCH. The monitoring of the PDCCH comprises monitoring the PDCCH in an active time of a DRX cycle. The active time includes a time when the UE performs continuous reception.

Claims

1. A method for monitoring a physical downlink control channel (PDCCH) by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, by the UE, a system information block (SIB) from a network;

identifying, by the UE, at least one downlink (DL) period based on a first time division duplex (TDD) uplink (UL)/DL configuration included in the SIB;

monitoring, by the UE, the PDCCH during the at least one DL period using a discontinuous reception (DRX) operation; and

obtaining, by the UE, information about at least one second TDD UL/DL configuration for one or more time intervals from the monitored PDCCH,

wherein the monitoring of the PDCCH comprises monitoring the PDCCH in an active time of a DRX cycle, and

wherein the active time includes a time when the UE performs continuous reception.

2. The method of claim 1, wherein the active time is repeated periodically.

3. The method of claim 1, further comprising:

applying, by the UE, the at least one second TDD UL/DL configuration to the one or more time intervals in response to obtaining the second TDD UL/DL configuration.

4. The method of claim 1, further comprising:

performing one of radio resource management (RRM) measurements and radio link monitoring (RLM) measurements during the active time of the DRX cycle.

5. The method of claim 1, wherein the PDCCH is monitored based on an identifier of the UE.

6. A method for transmitting information of monitoring a physical downlink control channel (PDCCH) by a network device in a wireless communication system, the method comprising:

transmitting, by the network device, to a user equipment (UE), a system information block (SIB) including a first time division duplex (TDD) uplink (UL)/downlink (DL) configuration; and

transmitting, by the network device, to the UE, information about a second TDD UL/DL configuration for one or more time intervals through the PDCCH during at least one DL period indicated by the first TDD UL/DL configuration,

wherein the at least one DL period is included in an active time of a discontinuous reception (DRX) cycle, and

wherein the active time includes a time when the UE performs continuous reception.

7. The method of claim 6, wherein the active time is repeated periodically.

8. The method of claim 6, wherein the at least one second TDD UL/DL configuration is applied to the one or more time intervals based on the information.

9. The method of claim 6, wherein one of radio resource management (RRM) measurements and radio link monitoring (RLM) measurements is performed by the UE during the active time of the DRX cycle.

10. The method of claim 6, wherein the PDCCH is monitored based on an identifier of the UE.

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

a transceiver configured to receive a system information block (SIB) from a network; and

at least one processor configured to;

identify at least one downlink (DL) transmission period based on a first time division duplex (TDD) uplink (UL)/DL configuration included in the SIB;

control the transceiver to monitor a physical downlink control channel (PDCCH) during the at least one DL period using a discontinuous reception (DRX) operation; and

obtain information about at least one second TDD UL/DL configuration for one or more time intervals from the monitored PDCCH,

wherein the active time includes a time when the UE performs continuous reception.

12. The UE of claim 11, wherein the active time is repeated periodically.

13. The UE of claim 11, wherein the at least one processor is further configured to:

apply the at least one second TDD UL/DL configuration to the one or more time interval in response to obtaining the second TDD UL/DL configuration.

14. The UE of claim 11, wherein the at least one processor is further configured to:

perform one of radio resource management (RRM) measurements and radio link monitoring (RLM) measurements during the active time of the DRX cycle.

15. The UE of claim 11, wherein the PDCCH is monitored based on an identifier of the UE.

16. A network device in a wireless communication system, the network device comprising:

a transceiver; and

at least one processor configured to control the transceiver to;

transmit, to a user equipment (UE), a system information block (SIB) including a first time division duplex (TDD) uplink (UL)/downlink (DL) configuration; and

transmit, to the UE, information about a second TDD UL/DL configuration for one or more time intervals through a physical downlink control channel (PDCCH) during at least one DL period indicated by the first TDD UL/DL configuration,

wherein the at least one DL period is included in an active time of a discontinuous reception (DRX) cycle, and

wherein the active time includes a time when the UE performs continuous reception.

17. The network device of claim 16, wherein the active time is repeated periodically.

18. The network device of claim 16, wherein the at least one second TDD UL/DL configuration is applied to the one or more time intervals based on the information.

19. The network device of claim 16, wherein one of radio resource management (RRM) measurements and radio link monitoring (RLM) measurements is performed by the UE during the active time of the DRX cycle.

20. The network device of claim 16, wherein the PDCCH is monitored based on an identifier of the UE.