# US 2018/0026903 A1 · Techniques and apparatuses for connection termination in a multi-subscriber identity module (multi-sim) device

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- Number: US 2018/0026903 A1
- Document ID: US20180026903A1
- Status: Published application
- Kind: A1
- Application number: 15/255,738
- Filed: 2016-09-02
- Published: 2018-01-25
- Earliest claimed: 2016-07-22
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Ravi Kanth KOTREKA; Harinath Reddy Patel; Naresh Babu Vungarala; Pankaj Gupta
- Web page: https://patentgrep.com/patent/US20180026903A1

## CPC

- H04W 76/34: Selective release of ongoing connections
- H04W 52/0251: {using monitoring of local events, e.g. events related to user activity}
- H04W 64/003: {locating network equipment}
- H04W 60/04: using triggered events
- 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

Certain aspects of the present disclosure generally relate to wireless communications. In some aspects, a wireless communication device may identify a completion of Internet Protocol multimedia subsystem (IMS) activity associated with an IMS only subscription of the wireless communication device. In some aspects, the wireless communication device may trigger a transfer from a connected mode to an idle mode based on identifying the completion of the IMS activity. Numerous other aspects are provided.

## Claims

### Claim 1

A method for wireless communication, comprising:
identifying, by a wireless communication device, a completion of Internet Protocol multimedia subsystem (IMS) activity associated with an IMS only subscription of the wireless communication device; and
triggering, by the wireless communication device, a transfer from a connected mode to an idle mode based on identifying the completion of the IMS activity.

### Claim 2 (depends on 1)

The method of claim 1, wherein triggering the transfer from the connected mode to the idle mode based on identifying the completion of the IMS activity includes:
triggering a tracking area update (TAU) procedure to trigger the transfer from the connected mode to the idle mode.

### Claim 3 (depends on 2)

The method of claim 2, further comprising:
transmitting a TAU request message to trigger the TAU procedure,
the TAU request message including data indicating the completion of the IMS activity.

### Claim 4 (depends on 1)

The method of claim 1, wherein triggering the transfer from the connected mode to the idle mode based on identifying the completion of the IMS activity includes:
releasing a radio connection to trigger the transfer from the connected mode to the idle mode.

### Claim 5 (depends on 1)

The method of claim 1, further comprising:
transferring from the connected mode to the idle mode based on triggering the transfer from the connected mode to the idle mode.

### Claim 6 (depends on 1)

The method of claim 1, where the IMS activity is associated with a first subscription; and
wherein the method further comprises:
maintaining a second subscription for other network activity when triggering the transfer from the connected mode to the idle mode.

### Claim 7 (depends on 1)

The method of claim 1, wherein the IMS activity is associated with a voice over long term evolution (VoLTE) session.

### Claim 8 (depends on 1)

The method of claim 1, wherein triggering the transfer from the connected mode to the idle mode based on identifying the completion of the IMS activity includes:
triggering the transfer from the connected mode to the idle mode before receiving a radio resource control connection release from a network.

### Claim 9 (depends on 1)

The method of claim 1, further comprising:
causing a radio resource control connection release based on triggering the transfer from the connected mode to the idle mode.

### Claim 10

A wireless communication device, comprising:
one or more processors configured to:
identify a completion of Internet Protocol multimedia subsystem (IMS) activity associated with an IMS only subscription of the wireless communication device; and
trigger a transfer from a connected mode to an idle mode based on identifying the completion of the IMS activity.

### Claim 11 (depends on 10)

The wireless communication device of claim 10, wherein the one or more processors, when triggering the transfer from the connected mode to the idle mode based on identifying the completion of the IMS activity, are configured to:
trigger a tracking area update (TAU) procedure to trigger the transfer from the connected mode to the idle mode.

### Claim 12 (depends on 11)

The wireless communication device of claim 11, wherein the one or more processors are further configured to:
transmit a TAU request message to trigger the TAU procedure,
the TAU request message including data indicating the completion of the IMS activity.

### Claim 13 (depends on 10)

The wireless communication device of claim 10, wherein the one or more processors, when triggering the transfer from the connected mode to the idle mode based on identifying the completion of the IMS activity, are configured to:
release a radio connection to trigger the transfer from the connected mode to the idle mode.

### Claim 14 (depends on 10)

The wireless communication device of claim 10, wherein the one or more processors are further configured to:
transfer from the connected mode to the idle mode based on triggering the transfer from the connected mode to the idle mode.

### Claim 15 (depends on 10)

The wireless communication device of claim 10, where the IMS activity is associated with a first subscription; and
wherein the one or more processors are further configured to:
maintain a second subscription for other network activity when triggering the transfer from the connected mode to the idle mode.

### Claim 16

A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:
one or more instructions that, when executed by one or more processors of a wireless communication device, cause the one or more processors to:
identify a completion of Internet Protocol multimedia subsystem (IMS) activity associated with an IMS only subscription of the wireless communication device; and
trigger a transfer from a connected mode to an idle mode based on identifying the completion of the IMS activity.

### Claim 17 (depends on 16)

The non-transitory computer-readable medium of claim 16, wherein the one or more instructions, that cause the one or more processors to trigger the transfer from the connected mode to the idle mode based on identifying the completion of the IMS activity, cause the one or more processors to:
trigger a tracking area update (TAU) procedure to trigger the transfer from the connected mode to the idle mode.

### Claim 18 (depends on 17)

The non-transitory computer-readable medium of claim 17, wherein the one or more instructions, when executed by the one or more processors, further cause the one or more processors to:
transmit a TAU request message to trigger the TAU procedure,
the TAU request message including data indicating the completion of the IMS activity.

### Claim 19 (depends on 16)

The non-transitory computer-readable medium of claim 16, wherein the one or more instructions, that cause the one or more processors to trigger the transfer from the connected mode to the idle mode based on identifying the completion of the IMS activity, cause the one or more processors to:
release a radio connection to trigger the transfer from the connected mode to the idle mode.

### Claim 20 (depends on 16)

The non-transitory computer-readable medium of claim 16, wherein the one or more instructions, when executed by the one or more processors, further cause the one or more processors to:
transfer from the connected mode to the idle mode based on triggering the transfer from the connected mode to the idle mode.