# US 12,193,103 B2 · Sidelink discontinuous reception alignment

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- Number: US 12,193,103 B2
- Document ID: US12193103B2
- Status: Granted
- Kind: B2
- Application number: 17/576,424
- Filed: 2022-01-14
- Published: 2022-07-14
- Granted: 2025-01-07
- Earliest claimed: 2021-01-14
- Assignees: Ofinno, LLC
- Applicants: Ofinno, LLC
- Inventors: Hyukjin Chae; Bing Hui; Esmael Hejazi Dinan; Yunjung Yi; Kyungmin Park
- Web page: https://patentgrep.com/patent/US12193103B2

## CPC

- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04L 5/14: Two-way operation using the same type of signal, i.e. duplex
- H04W 76/14: Direct-mode setup
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A first wireless device may receive, from a base station, one or more first messages indicating downlink (DL) discontinuous reception (DRX) parameters comprising a DL DRX on-duration start offset. The first wireless device may determine a starting time of a sidelink DRX (SL DRX) on-duration based on the DL DRX on-duration start offset. The first wireless device may receive, from a second wireless device, one or more sidelink transport blocks during the SL DRX on-duration.

## Claims

### Claim 1

A method comprising:
receiving, by a first wireless device from a base station, one or more first messages indicating downlink (DL) discontinuous reception (DRX) parameters comprising a DL DRX on-duration start offset;
determining a starting time of an active time of a sidelink DRX (SL DRX) based on the DL DRX on-duration start offset, wherein the determining further comprises determining an offset of the active time is the same as the DRX on-duration start offset based on the first wireless device being capable of simultaneous reception of a sidelink and a downlink; and
receiving, from a second wireless device, one or more sidelink transport blocks during the active time.

### Claim 2 (depends on 1)

The method of claim 1, wherein the one or more first messages comprise at least one of:
a radio resource control (RRC) message; or
a system information block (SIB).

### Claim 3 (depends on 1)

The method of claim 1, further comprising starting a SL DRX on-duration timer based on the starting time.

### Claim 4 (depends on 3)

The method of claim 3, further comprising monitoring one or more sidelink control channels while the SL-DRX on-duration timer is running.

### Claim 5 (depends on 1)

The method of claim 1, further comprising transmitting, to the second wireless device, one or more second messages indicating the starting time of the active time.

### Claim 6 (depends on 1)

The method of claim 1, wherein the one or more first messages comprise a sidelink radio resource control message (SL RRC).

### Claim 7 (depends on 1)

The method of claim 1, the determining further comprises determining an offset of the active time is the same as the DRX on-duration start offset based on an uplink-and-downlink-configuration, of a cell configured with sidelink, indicating a time division duplex.

### Claim 8 (depends on 7)

The method of claim 7, wherein the uplink-and-downlink-configuration is received from the base station.

### Claim 9 (depends on 7)

The method of claim 7, wherein the uplink-and-downlink-configuration is indicated for a sidelink carrier.

### Claim 10

A first wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the first wireless device to:
receive, from a base station, one or more first messages indicating downlink (DL) discontinuous reception (DRX) parameters comprising a DL DRX on-duration start offset;
determine a starting time of an active time of a sidelink DRX (SL DRX) based on the DL DRX on-duration start offset, wherein the determining further comprises determining an offset of the active time is the same as the DRX on-duration start offset based on the first wireless device being capable of simultaneous reception of a sidelink and a downlink; and
receive, from a second wireless device, one or more sidelink transport blocks during the active time.

### Claim 11 (depends on 10)

The first wireless device of claim 10, wherein the one or more first messages comprise at least one of:
a radio resource control (RRC) message;
a system information block (SIB); or
a sidelink radio resource control message (SL RRC).

### Claim 12 (depends on 10)

The first wireless device of claim 10, further comprising starting a SL DRX on-duration timer based on the starting time.

### Claim 13 (depends on 12)

The first wireless device of claim 12, further comprising monitoring one or more sidelink control channels while the SL-DRX on-duration timer is running.

### Claim 14 (depends on 10)

The first wireless device of claim 10, further comprising transmitting, to the second wireless device, one or more second messages indicating the starting time of the active time.

### Claim 15 (depends on 10)

The first wireless device of claim 10, the determining further comprises determining an offset of the active time is the same as the DRX on-duration start offset based on an uplink-and-downlink-configuration, of a cell configured with sidelink, indicating a time division duplex.

### Claim 16 (depends on 15)

The first wireless device of claim 15, wherein the uplink-and-downlink-configuration is received from the base station.

### Claim 17 (depends on 15)

The first wireless device of claim 15, wherein the uplink-and-downlink-configuration is indicated for a sidelink carrier.

### Claim 18

A system comprising: a first wireless device comprising one or more first processors and first memory storing first instructions that, when executed by the one or more first processors, cause the first wireless device to:
receive, from a base station, one or more first messages indicating downlink (DL) discontinuous reception (DRX) parameters comprising a DL DRX on-duration start offset;
determine a starting time of an active time of a sidelink DRX (SL DRX) based on the DL DRX on-duration start offset, wherein the determining further comprises determining an offset of the active time is the same as the DRX on-duration start offset based on the first wireless device being capable of simultaneous reception of a sidelink and a downlink; and
receive, from a second wireless device, one or more sidelink transport blocks during the active time; and
the second wireless device comprising one or more second processors and second memory storing second instructions that, when executed by the one or more second processors, cause the second wireless device to transmit, to the first wireless device, the one or more sidelink transport blocks.