Method for transitioning between multiple reception levels

• US 8,054,759 B2
• Filed: 06/25/2009
• Issued: 11/08/2011
• Est. Priority Date: 10/30/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung Jun, Lee, Young Dae, Yi, Seung June, Chun, Sung Duck
• Primary Examiner(s): Ngo; Ricky
• Assistant Examiner(s): Kao; Wei-Po
• Application Number:
  US12/491,968
• Publication Number:
  US 20090264164A1
• Time in Patent Office: 866 Days
• Field of Search: 370/241, 370/248, 370/252, 370/253, 370/431, 370/449
• US Class Current: 370/252
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

There is provided a method for enabling a user equipment (UE) to transition between a non-discontinuous reception (Non-DRX) level and at least one discontinuous reception (DRX) level. The UE in a DRX level wakes up periodically to monitor a scheduling channel. The method includes receiving a DRX indicator in a Non-DRX level with continuously monitoring the scheduling channel and transitioning from the Non-DRX level to a DRX level indicated by the DRX indicator. The UE can transition between multiple DRX levels by an explicit command/signaling.

Claims

1. A method of transitioning a reception level to monitor a scheduling channel in a wireless communication system, carried in a user equipment (UE), comprising:

starting a first timer when a scheduling channel indicates a transmission or reception of data by a base station;

monitoring continuously the scheduling channel in a non-discontinuous reception (Non-DRX) level while the first timer is running;

when the first timer is expired, transitioning to a first DRX level with a first DRX period and starting a second timer;

monitoring discontinuously the scheduling channel in the first DRX level; and

when the second timer is expired, transitioning to a second DRX level with a second DRX period,

wherein the first DRX period is shorter than the second DRX period.

2. The method of claim 1, further comprising:

monitoring discontinuously the scheduling channel in the second DRX level; and

when the scheduling channel in the second DRX level indicates a transmission or reception of data by the base station, transitioning to the Non-DRX level and starting the first timer.

3. The method of claim 1, further comprising:

when the scheduling channel in the first DRX level indicates a transmission or reception of data by the base station, transitioning to the Non-DRX level and starting the first timer.

4. The method of claim 1, further comprising:

receiving, from a base station, a message to configure a first discontinuous reception (DRX) level and a second DRX level.

5. The method of claim 1, wherein the scheduling channel is a paging indicator channel.

6. The method of claim 1, wherein the scheduling channel is a paging channel.

7. A user equipment (UE) comprising a processor configured to:

start a first timer when a scheduling channel indicates a transmission or reception of data by a base station monitor continuously the scheduling channel in a non-discontinuous reception (Non-DRX) level while the first timer is running;

when the first timer is expired, transition to the first DRX level with a first DRX period and start a second timer;

monitor discontinuously the scheduling channel in the first DRX level; and

when the second timer is expired, transition to a second DRX level with a second DRX period,

wherein the first DRX period is shorter than the second DRX period.

8. The UE of claim 7, wherein the processor is configured to:

monitor discontinuously the scheduling channel in the second DRX level; and

when the scheduling channel in the second DRX level indicates a transmission or reception of data by the base station, transition to the Non-DRX level and start the first timer.

9. The UE of claim 8, wherein the processor is configured to:

when the scheduling channel in the first DRX level indicates a transmission or reception of data by the base station, transitioning to the Non-DRX level and starting the first timer.

10. The UE of claim 7, wherein the processor is configured to receive, from a base station, a message to configure a first discontinuous reception (DRX) level and a second DRX level.

11. The UE of claim 7, wherein the scheduling channel is a paging indicator channel.

12. The UE of claim 7, wherein the scheduling channel is a paging channel.