METHOD FOR CONFIGURING DISCONTINUOUS RECEPTION IN A COMMUNICATION SYSTEM AND DEVICE THEREFOR

• US 20200137822A1
• Filed: 03/23/2017
• Published: 04/30/2020
• Est. Priority Date: 03/24/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LEE, Sunyoung, YI, Seungjune
• Granted Patent: US 10,869,357 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 72/1268 of uplink data flows
• 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]
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for configuring DRX in a wireless communication system. According to an aspect of the present invention, the method comprising: setting a timer for DL to a first value and a timer for UL to a second value based on DRX configuration information received from a BS, wherein the timer for DL is used for determining DL data transmission inactivity, and the timer for UL is used for determining UL data transmission inactivity; receiving a scheduling control channel in an active time; starting or restarting the timer for DL or the timer for UL based on whether the scheduling control channel indicates a new transmission in downlink or a new transmission in uplink.

Claims

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

setting a timer for downlink (DL) to a first value and a timer for uplink (UL) to a second value based on discontinuous reception (DRX) configuration information received from a base station (BS), wherein the timer for DL is used for determining DL data transmission inactivity, and the timer for UL is used for determining UL data transmission inactivity;

receiving a scheduling control channel in an active time;

starting or restarting the timer for DL without starting or restarting the timer for UL if the scheduling control channel indicates a new transmission in downlink; and

starting or restarting the timer for UL without starting or restarting the timer for DL if the scheduling control channel indicates a new transmission in uplink.

2. The method according to claim 1, wherein the scheduling control channel is a physical downlink control channel (PDCCH).

3. The method according to claim 1, further comprising:

receiving, from the BS, the DRX configuration information including a first DRX configuration for UL and a second DRX configuration for DL; and

configuring a first DRX cycle based on the first DRX configuration and a second DRX cycle based on the second DRX configuration.

4. The method according to claim 3, wherein when the timer for DL expires, the UE starts using the second DRX cycle.

5. The method according to claim 3, wherein when the timer for UL expires, the UE starts using the first DRX cycle.

6. The method according to claim 1, wherein the timer for UL keeps running if the scheduling control channel indicates a new transmission in downlink.

7. The method according to claim 1, wherein the timer for DL keeps running if the scheduling control channel indicates a new transmission in uplink.

8. A User Equipment (UE) for operating in a wireless communication system, the UE comprising:

a Radio Frequency (RF) module; and

a processor operably coupled with the RF module,

wherein the processor is configured to;

set a timer for downlink (DL) to a first value and a timer for uplink (UL) to a second value based on discontinuous reception (DRX) configuration information received from a base station (BS), wherein the timer for DL is used for determining DL data transmission inactivity, and the timer for UL is used for determining UL data transmission inactivity;

control the RF module to receive a scheduling control channel in an active time;

start or restart the timer for DL without starting or restarting the timer for UL if the scheduling control channel indicates a new transmission in downlink; and

start or restart the timer for UL without starting or restarting the timer for DL if the scheduling control channel indicates a new transmission in uplink.

9. The UE according to claim 8, wherein the scheduling control channel is a physical downlink control channel (PDCCH).

10. The UE according to claim 8, wherein the processor is further configured to:

control the RF module to receive, from the BS, the DRX configuration information including a first DRX configuration for UL and a second DRX configuration for DL; and

configure a first DRX cycle based on the first DRX configuration and a second DRX cycle based on the second DRX configuration.

11. The UE according to claim 10, wherein when the timer for DL expires, the UE starts using the second DRX cycle.

12. The UE according to claim 10, wherein when the timer for UL expires, the UE starts using the first DRX cycle.

13. The UE according to claim 8, wherein the timer for UL keeps running if the scheduling control channel indicates a new transmission in downlink.

14. The UE according to claim 10, wherein the timer for DL keeps running if the scheduling control channel indicates a new transmission in uplink.