# US 2022/0286994 A1 · Techniques for tunneling for a multi-subscription user equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0286994 A1 - Document ID: US20220286994A1 - Status: Published application - Kind: A1 - Application number: 17/653,412 - Filed: 2022-03-03 - Published: 2022-09-08 - Earliest claimed: 2021-03-04 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Vikram SINGH; Mutaz Zuhier Afif SHUKAIR; Yong XIE; Qingxin CHEN; Carlos Marcelo Dias PAZOS; Suli ZHAO; Can ZHAO; Rishav REJ; Bhupesh Manoharlal UMATT - Web page: https://patentgrep.com/patent/US20220286994A1 ## CPC - H04W 60/005: {Multiple registrations, e.g. multihoming} - H04W 8/18: Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data - H04W 24/04: Arrangements for maintaining operational condition - H04W 76/12: Setup of transport tunnels - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 8/183: {Processing at user equipment or user record carrier} - H04W 36/1443: {between licensed networks} - H04W 76/19: Connection re-establishment - H04W 76/34: Selective release of ongoing connections - H04W 76/50: for emergency connections - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract In some aspects, a user equipment (UE) may communicate using a first radio access technology (RAT) for a first subscription of the UE, wherein the first RAT is selected from a group that includes a first cellular RAT associated with the first subscription, a second cellular RAT associated with a second subscription of the UE, and a wireless local area network (WLAN) RAT. The UE may communicate using a second RAT for the second subscription of the UE, wherein the second RAT is selected from the group that includes the first cellular RAT associated with the first subscription, the second cellular RAT associated with the second subscription of the UE, and the WLAN RAT. The UE may transition, based at least in part on a condition, a communication link carrying a protocol data unit (PDU) session from the second subscription to the first subscription. Numerous other aspects are described. ## Claims ### Claim 1 An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and one or more processors, coupled to the memory, configured to: communicate using a first radio access technology (RAT) for a first subscription of the UE, wherein the first RAT is selected from a group that includes a first cellular RAT associated with the first subscription, a second cellular RAT associated with a second subscription of the UE, and a wireless local area network (WLAN) RAT; communicate using a second RAT for the second subscription of the UE, wherein the second RAT is selected from the group that includes the first cellular RAT associated with the first subscription, the second cellular RAT associated with the second subscription of the UE, and the WLAN RAT; and transition, based at least in part on a condition associated with a user activity of the UE or a condition associated with a device configuration of the UE, a communication link carrying a protocol data unit (PDU) session from the second subscription to the first subscription. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to deactivate a cellular radio component associated with the second subscription based at least in part on transitioning the communication link carrying the PDU session from the second subscription to the first subscription. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the condition associated with the device configuration of the UE is that a remaining battery power of the UE is less than or equal to a battery power threshold. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the condition associated with the device configuration of the UE is that the first subscription is a default data subscription (DDS) and the second subscription is a non-DDS subscription. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the communication link carrying the PDU session is a communication link carrying an IMS PDU session; and further comprise maintaining a first IMS registration on the first subscription and a second IMS registration on the second subscription after transitioning the communication link carrying the PDU session from the second subscription to the first subscription. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the condition associated with the user activity of the UE is that the first subscription is a default data subscription (DDS), that the second subscription is a non-DDS subscription, that a voice call is active on the first subscription, and that voice over WLAN service is enabled on the second subscription. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the condition associated with the user activity of the UE is that the first subscription is a default data subscription (DDS), that the second subscription is a non-DDS subscription, that a voice call is active on the second subscription, and that voice over WLAN service is enabled on the second subscription. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the condition associated with the user activity of the UE is that voice over WLAN service is disabled on the second subscription. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the condition associated with the user activity of the UE is that a call that originates on the second subscription experiences a call failure; and further comprising attempting the call on the first subscription after transitioning the communication link carrying the PDU session from the second subscription to the first subscription. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the condition associated with the device configuration of the UE is a radio frequency limitation associated with a first band for the first subscription and a second band for the second subscription. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the condition associated with the user activity of the UE is a high priority operation or a latency-sensitive operation associated with the first subscription. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the condition associated with the user activity of the UE is that Internet Protocol Multimedia Subsystem (IMS) service is not available for the second subscription. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the condition associated with the device configuration of the UE is a prediction of an event that will impact service on the second subscription. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the event is predicted based at least in part on applying one or more machine learning techniques. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein the condition associated with the user activity of the UE is an emergency call on the first subscription. ### Claim 16 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to establish a tunnel to a home network of the UE, via a network connection with another UE, based at least in part on detecting a loss of cellular coverage for the UE. ### Claim 17 (depends on 1) The apparatus of claim 1, wherein at least one of the first RAT for the first subscription or the second RAT for the second subscription is selected based at least in part on at least one of: a user setting stored by the UE; a RAT preference associated with at least one of the first cellular RAT, the second cellular RAT, or the WLAN RAT; at least one of an availability of the first cellular RAT, an availability of the second cellular RAT, or an availability of the WLAN RAT; or a signal quality measured for at least one of the first cellular RAT, the second cellular RAT, or the WLAN RAT. ### Claim 18 (depends on 1) The apparatus of claim 1, wherein the one or more processors are further configured to: monitor at least one of availability or signal quality for at least one of the first cellular RAT, the second cellular RAT, or the WLAN RAT; select a different RAT, than the selected RAT, based at least in part on monitoring at least one of the availability or the signal quality; and communicate on the first subscription using the selected different RAT. ### Claim 19 (depends on 1) The apparatus of claim 1, wherein the communication link carrying the PDU session includes at least one of an evolved packet data gateway tunnel or a non-3GPP interworking function tunnel. ### Claim 20 A method of wireless communication performed by a user equipment (UE), comprising: communicating using a first radio access technology (RAT) for a first subscription of the UE, wherein the first RAT is selected from a group that includes a first cellular RAT associated with the first subscription, a second cellular RAT associated with a second subscription of the UE, and a wireless local area network (WLAN) RAT; communicating using a second RAT for the second subscription of the UE, wherein the second RAT is selected from the group that includes the first cellular RAT associated with the first subscription, the second cellular RAT associated with the second subscription of the UE, and the WLAN RAT; and transitioning, based at least in part on a condition associated with a user activity of the UE or a condition associated with a device configuration of the UE, a communication link carrying a protocol data unit (PDU) session from the second subscription to the first subscription. ### Claim 21 (depends on 20) The method of claim 20, further comprising deactivating a cellular radio component associated with the second subscription based at least in part on transitioning the communication link carrying the PDU session from the second subscription to the first subscription. ### Claim 22 (depends on 20) The method of claim 20, wherein the condition associated with the device configuration of the UE is that a remaining battery power of the UE is less than or equal to a battery power threshold. ### Claim 23 (depends on 20) The method of claim 20, wherein the condition associated with the device configuration of the UE is that the first subscription is a default data subscription (DDS) and the second subscription is a non-DDS subscription. ### Claim 24 (depends on 20) The method of claim 20, wherein the communication link carrying the PDU session is a communication link carrying an IMS PDU session; and further comprising maintaining a first IMS registration on the first subscription and a second IMS registration on the second subscription after transitioning the communication link carrying the PDU session from the second subscription to the first subscription. ### Claim 25 (depends on 20) The method of claim 20, wherein the condition associated with the user activity of the UE is that the first subscription is a default data subscription (DDS), that the second subscription is a non-DDS subscription, that a voice call is active on the first subscription, and that voice over WLAN service is enabled on the second subscription. ### Claim 26 An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and one or more processors, coupled to the memory, configured to: communicate using a first radio access technology (RAT) for a first subscription of the UE, wherein the first RAT is a cellular RAT associated with the first subscription, where the UE is associated with a second subscription that can communicate using a communication link carrying a protocol data unit (PDU) session on the first RAT of the first subscription; and establish, with a gateway, the communication link carrying the PDU session on the first RAT of the first subscription. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the one or more processors are configured to transition the communication link to the first RAT of the first subscription. ### Claim 28 (depends on 26) The apparatus of claim 26, wherein the UE is associated with a single subscriber identity module (SIM). ### Claim 29 (depends on 28) The apparatus of claim 28, wherein the first subscription and the second subscription are the same subscription. ### Claim 30 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: communicate using a first radio access technology (RAT) for a first subscription of the UE, wherein the first RAT is selected from a group that includes a first cellular RAT associated with the first subscription, a second cellular RAT associated with a second subscription of the UE, and a wireless local area network (WLAN) RAT; communicate using a second RAT for the second subscription of the UE, wherein the second RAT is selected from the group that includes the first cellular RAT associated with the first subscription, the second cellular RAT associated with the second subscription of the UE, and the WLAN RAT; and transition, based at least in part on a condition associated with a user activity of the UE or a condition associated with a device configuration of the UE, a communication link carrying a protocol data unit (PDU) session from the second subscription to the first subscription.