# US 12,604,361 B2 · Techniques for discontinuous reception collision resolution for multi-SIM user equipment

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- Number: US 12,604,361 B2
- Document ID: US12604361B2
- Status: Granted
- Kind: B2
- Application number: 18/005,882
- Filed: 2020-12-16
- Published: 2023-09-14
- Granted: 2026-04-14
- Earliest claimed: 2020-09-10
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Uttam Vyas; Sumanth Kumar Kota; Rishika Tindola
- Web page: https://patentgrep.com/patent/US12604361B2

## CPC

- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports}
- H04W 36/0079: {in case of hand-off failure or rejection}
- H04W 36/30: by measured or perceived connection quality data
- H04W 8/183: {Processing at user equipment or user record carrier}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

In a device (120) with two SIMs (305a, 305b), the overlapping DRXs of the two connections is reduced by handovering one of the two SIM to a neighbor cell that satisfies a quality threshold.

## Claims

### Claim 1

A method of wireless communication performed by a user equipment (UE), comprising:
determining that a first discontinuous reception (DRX) cycle associated with a first subscriber identity module (SIM) of the UE overlaps with a second DRX cycle associated with a second SIM of the UE;
determining that a collision counter, associated with the first DRX cycle and the second DRX cycle, is satisfied;
determining whether a quality of a neighbor cell satisfies a threshold based at least in part on the determination that the first DRX cycle overlaps with the second DRX cycle; and
transmitting, based at least in part on the determination that the quality of the neighbor cell satisfies the threshold and the determination that the collision counter is satisfied, a measurement report configured to trigger a handover of at least one SIM of the first SIM or the second SIM to the neighbor cell.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
skipping one or more active times associated with one or more of the first DRX cycle or the second DRX cycle based at least in part on the quality of the neighbor cell failing to satisfy the threshold.

### Claim 3 (depends on 1)

The method of claim 1, further comprising:
skipping one or more active times associated with one or more of the first DRX cycle or the second DRX cycle based at least in part on the handover failing.

### Claim 4 (depends on 3)

The method of claim 3, further comprising:
determining that the handover has failed based at least in part on determining that a handover command is not received within a threshold time period.

### Claim 5 (depends on 1)

The method of claim 1, further comprising:
performing the handover of the at least one SIM to the neighbor cell, wherein the neighbor cell is associated with a third DRX cycle for the at least one SIM.

### Claim 6 (depends on 5)

The method of claim 5, further comprising:
determining that the third DRX cycle overlaps with a DRX cycle of a SIM of the first SIM and the second SIM; and
skipping one or more active times associated with one or more of the third DRX cycle or the DRX cycle of the SIM based at least in part on the overlap between the third DRX cycle and the DRX cycle of the SIM.

### Claim 7 (depends on 1)

The method of claim 1, further comprising:
selecting the at least one SIM associated with the measurement report based at least in part on a pending data session or a pending signaling session associated with the at least one SIM.

### Claim 8 (depends on 1)

The method of claim 1, wherein the at least one SIM is preconfigured as associated with the measurement report.

### Claim 9

A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors operatively coupled to the one or more memories, the one or more memories and the one or more processors configured to:
determine that a first discontinuous reception (DRX) cycle associated with a first subscriber identity module (SIM) of the UE overlaps with a second DRX cycle associated with a second SIM of the UE;
determine whether a quality of a neighbor cell satisfies a threshold based at least in part on the determination that the first DRX cycle overlaps with the second DRX cycle; and
transmit, based at least in part on the determination that the quality of the neighbor cell satisfies the threshold and a determination that a collision counter, associated with the first DRX cycle and the second DRX cycle, is satisfied, a measurement report configured to trigger a handover of at least one SIM of the first SIM or the second SIM to the neighbor cell.

### Claim 10 (depends on 9)

The UE of claim 9, wherein the one or more processors are further configured to:
skip one or more active times associated with one or more of the first DRX cycle or the second DRX cycle based at least in part on the quality of the neighbor cell failing to satisfy the threshold.

### Claim 11 (depends on 9)

The UE of claim 9, wherein the one or more processors are further configured to:
skip one or more active times associated with one or more of the first DRX cycle or the second DRX cycle based at least in part on the handover failing.

### Claim 12 (depends on 11)

The UE of claim 11, wherein the one or more processors are further configured to:
determine that the handover has failed based at least in part on determining that a handover command is not received within a threshold time period.

### Claim 13 (depends on 9)

The UE of claim 9, wherein the one or more processors are further configured to:
perform the handover of the at least one SIM to the neighbor cell, wherein the neighbor cell is associated with a third DRX cycle for the at least one SIM.

### Claim 14 (depends on 13)

The UE of claim 13, wherein the one or more processors are further configured to:
determine that the third DRX cycle overlaps with a DRX cycle of a SIM of the first SIM and the second SIM; and
skip one or more active times associated with one or more of the third DRX cycle or the DRX cycle of the SIM based at least in part on the overlap between the third DRX cycle and the DRX cycle of the SIM.

### Claim 15 (depends on 9)

The UE of claim 9, wherein the one or more processors are further configured to:
select the at least one SIM associated with the measurement report based at least in part on a pending data session or a pending signaling session associated with the at least one SIM.

### Claim 16 (depends on 9)

The UE of claim 9, wherein the at least one SIM is preconfigured as associated with the measurement report.

### Claim 17

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:
determine that a first discontinuous reception (DRX) cycle associated with a first subscriber identity module (SIM) of the UE overlaps with a second DRX cycle associated with a second SIM of the UE;
determine whether a quality of a neighbor cell satisfies a threshold based at least in part on the determination that the first DRX cycle overlaps with the second DRX cycle; and
transmit, based at least in part on the determination that the quality of the neighbor cell satisfies the threshold and a determination that a collision counter, associated with the first DRX cycle and the second DRX cycle, is satisfied, a measurement report configured to trigger a handover of at least one SIM of the first SIM or the second SIM to the neighbor cell.

### Claim 18 (depends on 17)

The non-transitory computer-readable medium of claim 17, wherein the one or more instructions further cause the UE to:
skip one or more active times associated with one or more of the first DRX cycle or the second DRX cycle based at least in part on the quality of the neighbor cell failing to satisfy the threshold.

### Claim 19 (depends on 17)

The non-transitory computer-readable medium of claim 17, wherein the one or more instructions further cause the UE to:
skip one or more active times associated with one or more of the first DRX cycle or the second DRX cycle based at least in part on the handover failing.

### Claim 20 (depends on 19)

The non-transitory computer-readable medium of claim 19, wherein the one or more instructions further cause the UE to:
determine that the handover has failed based at least in part on determining that a handover command is not received within a threshold time period.

### Claim 21 (depends on 17)

The non-transitory computer-readable medium of claim 17, wherein the one or more instructions further cause the UE to:
perform the handover of the at least one SIM to the neighbor cell, wherein the neighbor cell is associated with a third DRX cycle for the at least one SIM.

### Claim 22 (depends on 21)

The non-transitory computer-readable medium of claim 21, wherein the one or more instructions further cause the UE to:
determine that the third DRX cycle overlaps with a DRX cycle of a SIM of the first SIM and the second SIM; and
skip one or more active times associated with one or more of the third DRX cycle or the DRX cycle of the SIM based at least in part on the overlap between the third DRX cycle and the DRX cycle of the SIM.

### Claim 23 (depends on 17)

The non-transitory computer-readable medium of claim 17, wherein the one or more instructions further cause the UE to:
select the at least one SIM associated with the measurement report based at least in part on a pending data session or a pending signaling session associated with the at least one SIM.

### Claim 24 (depends on 17)

The non-transitory computer-readable medium of claim 17, wherein the at least one SIM is preconfigured as associated with the measurement report.

### Claim 25

An apparatus for wireless communication, comprising:
means for determining that a first discontinuous reception (DRX) cycle associated with a first subscriber identity module (SIM) of the apparatus overlaps with a second DRX cycle associated with a second SIM of the apparatus;
means for determining whether a quality of a neighbor cell satisfies a threshold based at least in part on the determination that the first DRX cycle overlaps with the second DRX cycle; and
means for transmitting, based at least in part on the determination that the quality of the neighbor cell satisfies the threshold and a determination that a collision counter, associated with the first DRX cycle and the second DRX cycle, is satisfied, a measurement report configured to trigger a handover of at least one SIM of the first SIM or the second SIM to the neighbor cell.

### Claim 26 (depends on 25)

The apparatus of claim 25, further comprising:
means for skipping one or more active times associated with one or more of the first DRX cycle or the second DRX cycle based at least in part on the quality of the neighbor cell failing to satisfy the threshold.

### Claim 27 (depends on 25)

The apparatus of claim 25, further comprising:
means for skipping one or more active times associated with one or more of the first DRX cycle or the second DRX cycle based at least in part on the handover failing.

### Claim 28 (depends on 27)

The apparatus of claim 27, further comprising:
means for determining that the handover has failed based at least in part on determining that a handover command is not received within a threshold time period.

### Claim 29 (depends on 25)

The apparatus of claim 25, further comprising:
means for performing the handover of the at least one SIM to the neighbor cell, wherein the neighbor cell is associated with a third DRX cycle for the at least one SIM.

### Claim 30 (depends on 29)

The apparatus of claim 29, further comprising:
means for determining that the third DRX cycle overlaps with a DRX cycle of a SIM of the first SIM and the second SIM; and
means for skipping one or more active times associated with one or more of the third DRX cycle or the DRX cycle of the SIM based at least in part on the overlap the third DRX cycle and the DRX cycle of the SIM.