Method and apparatus for enhancing discontinuous reception in wireless systems

Patent metadata

Field	Value
Publication number	US-2020245239-A1
Application number	US-202016848613-A
Country	US
Kind code	A1
Filing date	Apr 14, 2020
Priority date	Oct 27, 2006
Publication date	Jul 30, 2020
Grant date	—

Abstract

A method of discontinuous reception (DRX) in a wireless transmit receive unit (WTRU) includes the WTRU receiving DRX setting information over a radio resource control (RRC) signal, and the WTRU receiving DRX activation information over medium access control (MAC) signal.

First claim

What is claimed:

1 . A wireless transit/receive unit (WTRU) comprising a processor and memory, the WTRU configured to:
receive a radio resource control (RRC) message comprising a discontinuous reception (DRX) configuration, the DRX configuration comprising at least one of: an indication of a DRX cycle periodicity or an indication of a length of a minimum active period of a DRX cycle; determine if a data indication signal is successfully received via a control channel during the minimum active period of the DRX cycle; if the reception of the data indication signal via the control channel during the minimum active period of the DRX cycle is unsuccessful, go to sleep; and if the reception of the data indication signal via the control channel during the minimum active period of the DRX cycle is successful, stay awake beyond the minimum active period of the DRX cycle.

2 . The WTRU of claim 1 , wherein the WTRU is further configured to:
determine to resume DRX operation based on inactivity or reception of a MAC message; and resume the DRX operation.

3 . The WTRU of claim 1 , wherein the DRX cycle is a first DRX cycle or a second DRX cycle, and wherein the first DRX cycle is shorter than the second DRX cycle.

4 . The WTRU of claim 1 , wherein the WTRU is further configured to receive downlink data after reception of the data indication signal.

5 . The WTRU of claim 1 , wherein the control channel comprises a Layer 1 (L1) control channel.

6 . The WTRU of claim 1 , wherein the minimum active period begins at a time indicated by a DRX cycle start time.

7 . A method implemented by a wireless transit/receive unit (WTRU), the method comprising:
the WTRU receiving a radio resource control (RRC) message comprising a discontinuous reception (DRX) configuration, the DRX configuration comprising at least one of: an indication of a DRX cycle periodicity or an indication of a length of a minimum active period of a DRX cycle; the WTRU determining if a data indication signal is successfully received via a control channel during the minimum active period of the DRX cycle; if the reception of the data indication signal via the control channel during the minimum active period of the DRX cycle is unsuccessful, the WTRU going to sleep; and if the reception of the data indication signal via the control channel during the minimum active period of the DRX cycle is successful, the WTRU staying awake beyond the minimum active period of the DRX cycle.

8 . The method of claim 7 , further comprising:
determining to resume DRX operation based on inactivity or reception of a MAC message; and resuming the DRX operation.

9 . The method of claim 7 , wherein the DRX cycle is a first DRX cycle or a second DRX cycle, and wherein the first DRX cycle is shorter than the second DRX cycle.

10 . The method of claim 7 , further comprising receiving downlink data after reception of the data indication signal.

11 . The method of claim 7 , wherein the control channel comprises a Layer 1 (L1) control channel.

12 . The method of claim 7 , wherein the minimum active period begins at a time indicated by a DRX cycle start time.

Assignees

• Interdigital Tech Corp

Inventors

• Sammour Mohammed
• Chandra Arty
• Wang Jin
• Somasundaram Shankar

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W76/20

  Manipulation of established connections · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• H04W72/1268

  of uplink data flows · CPC title

• H04W52/0216

  using a pre-established activity schedule, e.g. traffic indication frame · CPC title