Method for transitioning between multiple reception levels

• US 8,054,758 B2
• Filed: 10/30/2007
• 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 ERIC
• Application Number:
  US12/311,803
• Publication Number:
  US 20100172250A1
• Time in Patent Office: 1,470 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:

receiving a message comprising information on a short DRX level from a base station;

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

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

when the first timer expires, transitioning to the short DRX level and starting a second timer;

monitoring discontinuously the scheduling channel in the short DRX level while the second timer is running; and

when the second timer expires, transitioning to a long DRX level.

2. The method of claim 1, wherein a DRX period of the short DRX level is different from a DRX period of the long DRX level.

3. The method of claim 2, wherein the message is a Radio Resource Control (RRC) message which is received from the base station.

4. The method of claim 2, wherein the DRX period of the long DRX level is longer than the DRX period of the short DRX level.

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

receive a message comprising information on a short DRX level from a base station;

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

monitor continuously the scheduling channel while operating at a non-discontinuous reception (Non-DRX) level while the first timer is running; and

when the first timer expires, transition to the short DRX level and start a second timer;

monitor discontinuously the scheduling channel in the short DRX level while the second timer is running; and

when the second timer expires, transition to a long DRX level.

6. The UE of claim 5, wherein a DRX period of the short DRX level is different from a DRX period of the long DRX level.

7. The UE of claim 6, wherein the message is a RRC message which is received from the base station.

8. The UE of claim 6, wherein the DRX period of the long DRX level is longer than the DRX period of the short DRX level.