Application timeline with unified design for active mode user equipment power saving for apparatuses, systems, and methods

Patent metadata

Field	Value
Publication number	US-12289735-B2
Application number	US-202217655252-A
Country	US
Kind code	B2
Filing date	Mar 17, 2022
Priority date	Apr 23, 2021
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

A wireless communication system may adapt physical downlink control channel (PDCCH) monitoring behaviors using downlink control information (DCI). The change in monitoring behavior may be skipping or switching. The timeline for applying switching or skipping may be applied after a reference point and a processing time. In some embodiments, the processing time may be either based on UE processing, network processing, or a combination.

First claim

The invention claImed is:

1. A method for a User Equipment (UE), the method comprising:
receiving a downlink scheduling grant comprising a downlink control information (DCI), the DCI indicating that the UE should apply a change in monitoring behavior;
determining a processing time for the change in monitoring behavior, wherein determining the processing time comprises:
determining time periods corresponding to:
a first time corresponding to decoding the DCI and configuring a separate search space,
a second time corresponding to decoding the DCI and applying a skipping command,
a third time corresponding to a network node processing the ACK message, and
a fourth time corresponding to a drx-HARQ-RTT-TimerDL; and

identifying a maximum of the time periods, wherein the maximum of the time periods is the processing time;

transmitting an Acknowledgement (ACK) message to indicate that the DCI was received; and
applying the change in monitoring behavior when an amount of time equivalent to the processing time has elapsed after the ACK message was transmitted.

2. The method of claim 1 , wherein the change in monitoring behavior comprises switching or skipping.

3. The method of claim 1 , further comprising:
generating and transmitting a negative-acknowledgment (NACK) message when the UE fails to correctly decode the DCI or when the UE did not decode a physical downlink shared channel (PDSCH); and
receiving a retransmission DCI indicating that the UE should apply skipping or switching.

4. The method of claim 1 , wherein the processing time depends on whether the change in monitoring behavior is switching or skipping.

5. An apparatus for a User Equipment (UE), comprising:
a memory to store a downlink scheduling grant; and
one or more processors configured to cause the UE to:
receive the downlink scheduling grant comprising a downlink control information (DCI), the DCI indicating that the UE should apply a change in monitoring behavior;

determine a processing time for the change in monitoring behavior, wherein determining the processing time comprises:
determining time periods corresponding to:
a first time corresponding to decoding the DCI and configuring a separate search space;
a second time corresponding to decoding the DCI and applying a skipping command;
a third time corresponding to a network node processing the ACK message;
a fourth time corresponding to a drx-HARQ-RTT-TimerDL; and

identifying a maximum of the time periods, wherein the maximum of the time periods is the processing time;
transmit an Acknowledgement (ACK) message to indicate that the DCI was received; and
apply the change in monitoring behavior when an amount of time equivalent to the processing time has elapsed after the ACK message was transmitted.

6. The apparatus of claim 5 , wherein the change is monitoring behavior comprises switching or skipping.

7. The apparatus of claim 5 , wherein the one or more processors are further configured to cause the UE to:
generate and transmit a negative-acknowledgment (NACK) message when the UE fails to correctly decode the DCI or when the UE did not decode a physical downlink shared channel (PDSCH); and
receive a retransmission DCI indicating that the UE should apply skipping or switching.

8. The apparatus of claim 5 , wherein the processing time depends on whether the change in monitoring behavior is switching or skipping.

9. A non-transitory computer-readable storage medium including instructions that, when executed by one or more processors of a User Equipment (UE), cause the UE to:
receive a downlink scheduling grant comprising a downlink control information (DCI), the DCI indicating that the UE should apply a change in monitoring behavior;
determine a processing time for the change in monitoring behavior, wherein to determine the processing time the instructions cause the UE to:
determine time periods corresponding to:
a first time corresponding to decoding the DCI and configuring a separate search space,
a second time corresponding to decoding the DCI and applying a skipping command,
a third time corresponding to a network node processing the ACK message, and
a fourth time corresponding to a drx-HARQ-RTT-TimerDL; and

identify a maximum of the time periods, wherein the maximum of the time periods is the processing time;

transmit an Acknowledgement (ACK) message to indicate that the DCI was received; and
apply the change in monitoring behavior when an amount of time equivalent to the processing time has elapsed after the ACK message was transmitted.

10. The non-transitory computer-readable storage medium of claim 9 , wherein the change in monitoring behavior comprises switching or skipping.

11. The non-transitory computer-readable storage medium of claim 9 , wherein the instructions, when executed by the one or more processors of the UE, further cause the UE to:
generate and transmit a negative-acknowledgment (NACK) message when the UE fails to correctly decode the DCI or when the UE did not decode a physical downlink shared channel (PDSCH); and
receive a retransmission DCI indicating that the UE should apply skipping or switching.

12. The non-transitory computer-readable storage medium of claim 9 , wherein the processing time depends on whether the change in monitoring behavior is switching or skipping.

Assignees

• Apple Inc

Inventors

• Niu Huaning
• Zhang Dawei
• Aziz Farhan
• Sun Haitong
• He Hong
• Ehsan Navid
• Ye Sigen
• Zeng Wei
• Zhang Wei
• Yang Weidong

Classifications

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04W76/28

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

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• H04L1/1858

  Transmission or retransmission of more than one copy of acknowledgement message · CPC title