# US 12,193,102 B2 · Methods and apparatuses for adaptive discontinuous reception configuration

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- Number: US 12,193,102 B2
- Document ID: US12193102B2
- Status: Granted
- Kind: B2
- Application number: 17/290,127
- Filed: 2019-11-01
- Published: 2021-12-23
- Granted: 2025-01-07
- Earliest claimed: 2018-11-02
- Assignees: Telefonaktiebolaget LM Ericsson (publ)
- Applicants: Telefonaktiebolaget LM Ericsson (publ)
- Inventors: Sina Maleki; Martin Van Der Zee; Ali Nader; Yutao Sui; Andres Reial
- Web page: https://patentgrep.com/patent/US12193102B2

## CPC

- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- 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

A method, network node and wireless device for adaptive connected discontinuous reception (C-DRX) configurations. According to one aspect, a method includes configuring a first set of short discontinuous reception, DRX, cycles and a second set of long DRX cycles, each DRX cycle having a duration for which the WD listens for an uplink grant from the network node. The method further includes transmitting to the WD at least a number of DRX cycles in the first set and a number of cycles in the second set.

## Claims

### Claim 1

A method implemented in a wireless device (WD) a control channel during discontinuous reception, DRX, cycle periods, each DRX cycle period comprising an on-duration and an off-duration;
setting a set of short DRX cycle periods for short DRX cycles;
setting an initial long DRX cycle value for long DRX cycles, the initial long DRX cycle value being longer than the set of short DRX cycle periods;
monitoring the control channel during the on-duration of one or more DRX cycles having a first short DRX cycle value selected from the set of short DRX cycle periods;
if no control message is received using the first short DRX cycle value, monitoring the control channel during the on-durations of one or more DRX cycles having a second short DRX cycle value selected from the set of short DRX cycle periods, the second short DRX cycle value being longer than the first short DRX cycle value; and
if no control message is received using the second short DRX cycle value, monitoring the control channel during the on-duration of one or more DRX cycles having the initial long DRX cycle value.

### Claim 2 (depends on 1)

The method of claim 1, wherein the set of short DRX cycle periods defines a set of increasing short DRX cycle durations; and
the set of long DRX cycle periods defines a set of increasing long DRX cycle durations.

### Claim 3 (depends on 1)

The method of claim 1, further comprising being configured by a network node with a starting short DRX cycle value from the set of short DRX cycle periods to monitor the control channel.

### Claim 4 (depends on 1)

The method of claim 1, further comprising being configured by a network node with an approach to select the second short DRX cycle from the set of short DRX cycle periods.

### Claim 5 (depends on 1)

The method of claim 1, wherein the control channel is a physical downlink control channel (PDCCH) and the control message is one of an uplink and downlink grant.

### Claim 6 (depends on 1)

The method of claim 1, further comprising:
setting a set of long DRX cycle periods for long DRX cycles, the set of long DRX cycle periods comprising the initial long DRX cycle value; and
if no control message is received using the initial long DRX cycle value, monitoring the control channel during the on-duration of one or more DRX cycles having a second long DRX value period selected from the set of long DRX cycle periods, the second long DRX cycle value being longer than the initial long DRX cycle value.

### Claim 7 (depends on 6)

The method of claim 6, wherein the set of long DRX cycle periods is a set of increasing long DRX cycle periods.

### Claim 8 (depends on 1)

The method of claim 1, further comprising being configured by a network node with the set of short DRX cycle periods.

### Claim 9 (depends on 8)

The method of claim 8, further comprising providing assistance information to the network node for determining the set of short DRX periods.

### Claim 10 (depends on 8)

The method of claim 8, further comprising being configured by the network node with the set of long DRX cycle periods.

### Claim 11 (depends on 10)

The method of claim 10, further comprising being configured by the network node with the set of long DRX cycle periods through radio resource control (RRC) signaling.

### Claim 12

A wireless device, WD, configured for monitoring a control channel during discontinuous reception, DRX, cycle periods, each DRX cycle period comprising an on-duration and an off-duration, the WD configured to:
set a set of short DRX cycle periods for short DRX cycles;
set an initial long DRX cycle value for long DRX cycles, the initial long DRX cycle value being longer than the short DRX cycle periods;
monitor the control channel during the on-duration of one or more DRX cycles having a first short DRX cycle value selected from the set of short DRX cycle periods;
if no control message is received using the first short DRX cycle value, monitor the control channel during the on-durations of one or more DRX cycles having a second short DRX cycle value selected from the set of short DRX cycle periods, the second short DRX cycle value being longer than the first short DRX cycle value;
if no control message is received using the second short DRX cycle period, monitor the control channel during the on-duration of one or more DRX cycles having the initial long DRX cycle value.

### Claim 13 (depends on 12)

The wireless device of claim 12, wherein the wireless device is configured by a network node with the set of short DRX cycle periods.

### Claim 14 (depends on 12)

The wireless device of claim 12, wherein the set of short DRX cycle periods is a set of increasing short DRX cycle periods.

### Claim 15 (depends on 12)

The wireless device of claim 12, wherein the control channel is a physical downlink control channel (PDCCH) and the control message is one of an uplink and downlink grant.

### Claim 16 (depends on 12)

The wireless device of claim 12, further configured to:
set a set of long DRX cycle periods for long DRX cycles, the set of long DRX cycle periods comprising the initial long DRX cycle value; and
if no control message is received using the initial long DRX cycle value, monitor the control channel during the on-duration of one or more DRX cycles having a second long DRX cycle value selected from the set of long DRX cycle periods, the second long DRX cycle value being longer than the initial long DRX cycle value.

### Claim 17 (depends on 16)

The wireless device of claim 16, wherein the set of long DRX cycle values periods is a set of increasing long DRX cycle periods.

### Claim 18 (depends on 12)

The wireless device of claim 12, further comprising being configured by a network node with the set of short DRX cycle periods through radio resource control (RRC) signaling.

### Claim 19 (depends on 16)

The wireless device of claim 16, further comprising being configured by a network node with the set of long DRX cycle periods through radio resource control (RRC) signaling.