Method and apparatus for enabling cell reselection for WTRU operating in discontinuous reception

Patent metadata

Field	Value
Publication number	US-9736734-B2
Application number	US-201313962232-A
Country	US
Kind code	B2
Filing date	Aug 8, 2013
Priority date	Feb 1, 2008
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A method for discontinuous reception (DRX) implemented in a wireless transmit/receive unit (WTRU) during cell reselection including initiating cell reselection; disabling DRX operation, wherein disabling DRX operation enables continuous reception; transmitting a CELL UPDATE message; receiving a CELL UPDATE CONFIRM message; and enabling DRX operation based on the received CELL UPDATE CONFIRM message.

First claim

What is claimed is:

1. A method for discontinuous reception (DRX) implemented in a wireless transmit/receive unit (WTRU), the method comprising:
determining that the WTRU has a high-speed downlink shared channel (HS-DSCH) radio network temporary identifier (H-RNTI);
enabling DRX operation in response to the determination that the WTRU has the H-RNTI;
performing cell reselection and releasing the H-RNTI; and
disabling discontinuous reception (DRX) operation in response to releasing the H-RNTI, wherein the disabling of DRX operation starts continuous reception operation in the WTRU.

2. The method of claim 1 , further comprising receiving an H-RNTI associated with a new cell.

3. The method of claim 2 , further comprising reenabling DRX operation in response to determining that the WTRU has the H-RNTI associated with the new cell.

4. The method of claim 1 , wherein performing the cell reselection comprises:
transmitting a CELL_UPDATE message associated with performing the cell reselection; and
receiving a CELL_UPDATE CONFIRM message indicating that the cell reselection is successful.

5. The method of claim 1 , wherein determining that the WTRU has the H-RNTI comprises determining that the WTRU is in a CELL_FACH state.

6. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
determine that the WTRU has a high-speed downlink shared channel (HS-DSCH) radio network temporary identifier (H-RNTI);
enable DRX operation in response to the determination that the WTRU has the H-RNTI;
perform cell reselection and release the H-RNTI; and
disable discontinuous reception (DRX) operation in response to the release of the H-RNTI, wherein being configured to disable DRX operation comprises being configured to start continuous reception operation in the WTRU.

7. The WTRU of claim 6 , wherein the processor is further configured to receive an H-RNTI associated with a new cell.

8. The WTRU of claim 7 , wherein the processor is further configured to reenable DRX operation in response to a determination that the WTRU has the H-RNTI associated with the new cell.

9. The WTRU of claim 6 , wherein to perform the cell reselection the processor is further configured to:
transmit a CELL_UPDATE message associated with performance of the cell reselection; and
receive a CELL_UPDATE CONFIRM message that indicates that the cell reselection is successful.

10. The WTRU of claim 6 , wherein being configured to determine that the WTRU has the H-RNTI comprises being configured to determine that the WTRU is in a CELL_FACH state.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Di Girolamo Rocco
• Pani Diana
• Cave Christopher
• Marinier Paul
• Roy Vincent

Classifications

• Y02D30/70

  in wireless communication networks · CPC title

• H04W88/02

  Terminal devices · CPC title

• H04W60/00

  Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration · CPC title

• H04W76/28 Primary

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title

• H04W48/20 Primary

  Selecting an access point · CPC title