# US 11,910,469 B2 · Early connected discontinuous reception

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- Number: US 11,910,469 B2
- Document ID: US11910469B2
- Status: Granted
- Kind: B2
- Application number: 17/452,282
- Filed: 2021-10-26
- Published: 2023-04-27
- Granted: 2024-02-20
- Earliest claimed: 2021-10-26
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Marcelo Schiocchet; Amrit Kharel; Kausik Ray Chaudhuri; Alexei Yurievitch Gorokhov
- Web page: https://patentgrep.com/patent/US11910469B2

## CPC

- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04W 52/0229: {where the received signal is a wanted signal}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for connected discontinuous reception (CDRX), the configuration indicating a first condition associated with a first CDRX parameter and a second condition associated with a second CDRX parameter. The UE may transition to a CDRX cycle when the first condition and the second condition are satisfied prior to an expiration of a CDRX inactivity timer. Numerous other aspects are described.

## Claims

### Claim 1

A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive a configuration for connected discontinuous reception (CDRX), the configuration indicating a first condition associated with a first CDRX parameter and a second condition associated with a second CDRX parameter; and
transition to a CDRX cycle when the first condition and the second condition are satisfied prior to an expiration of a CDRX inactivity timer.

### Claim 2 (depends on 1)

The UE of claim 1, wherein the first CDRX parameter indicates a first quantity of slots, and wherein the first condition is satisfied when there is inactivity at the UE for at least the first quantity of slots.

### Claim 3 (depends on 1)

The UE of claim 1, wherein the second CDRX parameter indicates a second quantity of slots, and wherein the second condition is satisfied when a current slot is less than the second quantity of slots prior to a start of a next CDRX on duration.

### Claim 4 (depends on 1)

The UE of claim 1, wherein the second CDRX parameter indicates a maximum time difference, wherein the one or more processors are further configured to:
calculate a time difference between a current transmission time interval (TTI) and a time location of a next on duration of the CDRX cycle, wherein the second condition is satisfied when the time difference is less than the maximum time difference.

### Claim 5 (depends on 1)

The UE of claim 1, wherein the second condition is satisfied when a current value of the CDRX inactivity timer is greater than a value of the second CDRX parameter.

### Claim 6 (depends on 1)

The UE of claim 1, wherein the first CDRX parameter is configured to control a maximum latency associated with the CDRX cycle and the second CDRX parameter is configured to prevent the UE from transitioning to the CDRX cycle when a scheduling rate satisfies a scheduling rate threshold.

### Claim 7 (depends on 1)

The UE of claim 1, wherein after transitioning to the CDRX cycle, the UE monitors one or more wake up slots indicated in the configuration.

### Claim 8 (depends on 7)

The UE of claim 7, wherein the one or more wake up slots are prior to an on duration associated with the UE transitioning to the CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer.

### Claim 9 (depends on 1)

The UE of claim 1, wherein the UE transitions to a short CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer, and wherein the CDRX inactivity timer continues to run based at least in part on the UE transitioning to the short CDRX cycle.

### Claim 10 (depends on 9)

The UE of claim 9, wherein a CDRX short cycle timer is initiated based at least in part on an expiration of the CDRX inactivity timer.

### Claim 11 (depends on 1)

The UE of claim 1, wherein the UE transitions to a long CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer.

### Claim 12

A method of wireless communication performed by a user equipment (UE), comprising:
receiving a configuration for connected discontinuous reception (CDRX), the configuration indicating a first condition associated with a first CDRX parameter and a second condition associated with a second CDRX parameter; and
transitioning to a CDRX cycle when the first condition and the second condition are satisfied prior to an expiration of a CDRX inactivity timer.

### Claim 13 (depends on 12)

The method of claim 12, wherein the first CDRX parameter indicates a first quantity of slots, and wherein the first condition is satisfied when there is inactivity at the UE for at least the first quantity of slots.

### Claim 14 (depends on 12)

The method of claim 12, wherein the second CDRX parameter indicates a maximum time difference, the method further comprising:
calculating a time difference between a current transmission time interval (TTI) and a time location of a next on duration of the CDRX cycle, wherein the second condition is satisfied when the time difference is less than the maximum time difference.

### Claim 15 (depends on 12)

The method of claim 12, wherein the first CDRX parameter is configured to control a maximum latency associated with the CDRX cycle and the second CDRX parameter is configured to prevent the UE from transitioning to the CDRX cycle when a scheduling rate satisfies a scheduling rate threshold.

### Claim 16 (depends on 12)

The method of claim 12, wherein after transitioning to the CDRX cycle, the UE monitors one or more wake up slots indicated in the configuration, wherein the one or more wake up slots are prior to an on duration associated with the UE transitioning to the CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer.

### Claim 17 (depends on 12)

The method of claim 12, wherein the UE transitions to a short CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer, and wherein the CDRX inactivity timer continues to run based at least in part on the UE transitioning to the short CDRX cycle.

### Claim 18 (depends on 17)

The method of claim 17, wherein a CDRX short cycle timer is initiated based at least in part on an expiration of the CDRX inactivity timer.

### Claim 19

A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
receive a configuration for connected discontinuous reception (CDRX), the configuration indicating a first condition associated with a first CDRX parameter and a second condition associated with a second CDRX parameter; and
transition to a CDRX cycle when the first condition and the second condition are satisfied prior to an expiration of a CDRX inactivity timer.

### Claim 20 (depends on 19)

The non-transitory computer-readable medium of claim 19, wherein the first CDRX parameter indicates a first quantity of slots, and wherein the first condition is satisfied when there is inactivity at the UE for at least the first quantity of slots.

### Claim 21 (depends on 19)

The non-transitory computer-readable medium of claim 19, wherein the second CDRX parameter indicates a maximum time difference, and wherein the one or more instructions further cause the UE to:
calculate a time difference between a current transmission time interval (TTI) and a time location of a next on duration of the CDRX cycle, wherein the second condition is satisfied when the time difference is less than the maximum time difference.

### Claim 22 (depends on 19)

The non-transitory computer-readable medium of claim 19, wherein after transitioning to the CDRX cycle, the UE monitors one or more wake up slots indicated in the configuration, wherein the one or more wake up slots are prior to an on duration associated with the UE transitioning to the CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer.

### Claim 23 (depends on 19)

The non-transitory computer-readable medium of claim 19, wherein the UE transitions to a short CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer, wherein the CDRX inactivity timer continues to run based at least in part on the UE transitioning to the short CDRX cycle, and wherein a CDRX short cycle timer is initiated based at least in part on an expiration of the CDRX inactivity timer.

### Claim 24

An apparatus for wireless communication, comprising:
means for receiving a configuration for connected discontinuous reception (CDRX), the configuration indicating a first condition associated with a first CDRX parameter and a second condition associated with a second CDRX parameter; and
means for transitioning to a CDRX cycle when the first condition and the second condition are satisfied prior to an expiration of a CDRX inactivity timer.

### Claim 25 (depends on 24)

The apparatus of claim 24, wherein the first CDRX parameter indicates a first quantity of slots, and wherein the first condition is satisfied when there is inactivity at the apparatus for at least the first quantity of slots.

### Claim 26 (depends on 24)

The apparatus of claim 24, wherein the second CDRX parameter indicates a second quantity of slots, and wherein the second condition is satisfied when a current slot is less than the second quantity of slots prior to a start of a next CDRX on duration.

### Claim 27 (depends on 24)

The apparatus of claim 24, wherein the second CDRX parameter indicates a maximum time difference, the apparatus further comprising:
means for calculating a time difference between a current transmission time interval (TTI) and a time location of a next on duration of the CDRX cycle, wherein the second condition is satisfied when the time difference is less than the maximum time difference.

### Claim 28 (depends on 24)

The apparatus of claim 24, wherein the first CDRX parameter is configured to control a maximum latency associated with the CDRX cycle and the second CDRX parameter is configured to prevent the apparatus from transitioning to the CDRX cycle when a scheduling rate satisfies a scheduling rate threshold.

### Claim 29 (depends on 24)

The apparatus of claim 24, wherein after transitioning to the CDRX cycle, the apparatus monitors one or more wake up slots indicated in the configuration, wherein the one or more wake up slots are prior to an on duration associated with the apparatus transitioning to the CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer.

### Claim 30 (depends on 24)

The apparatus of claim 24, wherein the apparatus transitions to a short CDRX cycle when the first condition and the second condition are satisfied prior to the expiration of the CDRX inactivity timer, wherein the CDRX inactivity timer continues to run based at least in part on the apparatus transitioning to the short CDRX cycle, and wherein a CDRX short cycle timer is initiated based at least in part on an expiration of the CDRX inactivity timer.