# US 12,192,744 B2 · Mitigating limited service in multi-sim mode due to temperature rise > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,744 B2 - Document ID: US12192744B2 - Status: Granted - Kind: B2 - Application number: 17/484,915 - Filed: 2021-09-24 - Published: 2023-04-20 - Granted: 2025-01-07 - Earliest claimed: 2021-09-24 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Mugdha Sanjay Patil; Mahbod Ghelichi; Gaurav Singh; James Francis Geekie - Web page: https://patentgrep.com/patent/US12192744B2 ## CPC - H04W 8/183: {Processing at user equipment or user record carrier} - G06F 1/206: {comprising thermal management} - G06F 1/3206: Monitoring of events, devices or parameters that trigger a change in power modality - H04W 36/1443: {between licensed networks} - H04W 36/24: Reselection being triggered by specific parameters - 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) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques that may help mitigate service loss for a UE (e.g., in DSDA mode) due to temperature rise. According to certain aspects, a UE detects, while operating in a multi subscriber identity module (SIM) mode with at least a first subscriber (SUB) and a second subscriber (SUB) active on a first radio access technology (RAT), that the UE has reached a first temperature threshold less than a second temperature threshold at which the UE limits service in the first RAT and greater than a third temperature threshold associated with a temperature mitigation level. The UE then takes action to move the first SUB to a second RAT in response to the detecting. ## Claims ### Claim 1 A method for wireless communications by a user equipment (UE), comprising: detecting, while operating in a multi subscriber identity module (SIM) mode with at least a first subscriber (SUB) and a second subscriber (SUB) active on a first radio access technology (RAT), that a temperature of the UE has reached a first temperature threshold less than a second temperature threshold at which the UE limits service in the first RAT and greater than a third temperature threshold associated with a temperature mitigation level; and taking action to move the first SUB to a second RAT in response to the detecting, wherein taking action to move the first SUB to the second RAT comprises performing internal redirection of the first SUB from a cell of the first RAT to a cell of the second RAT based on one or more databases maintained at the UE. ### Claim 2 (depends on 1) The method of claim 1, wherein the first RAT comprises a 5G new radio (NR) RAT and the second RAT comprises a long term evolution (LTE) RAT. ### Claim 3 (depends on 1) The method of claim 1, further comprising taking action to move the first SUB back to the first RAT if the temperature of the UE falls below a fourth temperature threshold. ### Claim 4 (depends on 3) The method of claim 3, wherein the fourth temperature threshold is determined based on a difference between the first temperature threshold and the second temperature threshold. ### Claim 5 (depends on 1) The method of claim 1, further comprising selecting the first SUB to move to the second RAT based on a lower priority of the first SUB relative to the second SUB based on at least one of quality of service (QOS) of associated traffic, QoS Class Identifier (QCI) of associated traffic, or whether associated traffic is guaranteed bit rate (GBR) or non-GBR. ### Claim 6 (depends on 5) The method of claim 5, wherein traffic associated with the first SUB comprises data traffic and traffic associated with the second SUB comprises voice traffic. ### Claim 7 (depends on 5) The method of claim 5, wherein traffic associated with the first SUB comprises N-GBR data traffic and traffic associated with the second SUB comprises GBR data traffic. ### Claim 8 (depends on 1) The method of claim 1, wherein the one or more databases comprise at least an acquisition database indicating frequencies for cells of the first RAT previously acquired by the UE or an inter-RAT database indicating cells available for inter-RAT redirection. ### Claim 9 (depends on 8) The method of claim 8, further comprising selecting the cell of the second RAT based on an intersection of entries from the acquisition database and a list of neighbor cells broadcast in system information. ### Claim 10 (depends on 9) The method of claim 9, further comprising performing internal redirection to move the first SUB back to a cell of the first RAT if the temperature of the UE falls below the fourth temperature threshold, based on the intersection of entries from the acquisition database and the list of neighbor cells broadcast in the system information. ### Claim 11 An apparatus for wireless communications by a user equipment (UE), comprising: at least one processor and a memory configured to: detect, while operating in a multi subscriber identity module (SIM) mode with at least a first subscriber (SUB) and a second subscriber (SUB) active on a first radio access technology (RAT), that a temperature of the UE has reached a first temperature threshold less than a second temperature threshold at which the UE limits service in the first RAT and greater than a third temperature threshold associated with a temperature mitigation level; and take action to move the first SUB to a second RAT in response to the detecting, wherein the at least one processor and a memory are further configured to take action to move the first SUB back to the first RAT if the temperature of the UE falls below a fourth temperature threshold, wherein taking action to move the first SUB to the second RAT comprises performing internal redirection of the first SUB from a cell of the first RAT to a cell of the second RAT based on one or more databases maintained at the UE. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the first RAT comprises a 5G new radio (NR) RAT and the second RAT comprises a long term evolution (LTE) RAT. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the fourth temperature threshold is determined based on a difference between the first temperature threshold and the second temperature threshold. ### Claim 14 (depends on 11) The apparatus of claim 11, wherein the at least one processor and a memory are further configured to select the first SUB to move to the second RAT based on a lower priority of the first SUB relative to the second SUB based on at least one of quality of service (QoS) of associated traffic, QoS Class Identifier (QCI) of associated traffic, or whether associated traffic is guaranteed bit rate (GBR) or non-GBR. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein traffic associated with the first SUB comprises data traffic and traffic associated with the second SUB comprises voice traffic. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein traffic associated with the first SUB comprises N-GBR data traffic and traffic associated with the second SUB comprises GBR data traffic. ### Claim 17 (depends on 11) The apparatus of claim 11, wherein the one or more databases comprise at least an acquisition database indicating frequencies for cells of the first RAT previously acquired by the UE or an inter-RAT database indicating cells available for inter-RAT redirection. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the at least one processor and a memory are further configured to select the cell of the second RAT based on an intersection of entries from the acquisition database and a list of neighbor cells broadcast in system information. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the at least one processor and a memory are further configured to perform internal redirection to move the first SUB back to a cell of the first RAT if the temperature of the UE falls below the fourth temperature threshold, based on the intersection of entries from the acquisition database and the list of neighbor cells broadcast in the system information. ### Claim 20 A non-transitory computer readable medium having instructions stored thereon for: detecting, while operating in a multi subscriber identity module (SIM) mode with at least a first subscriber (SUB) and a second subscriber (SUB) active on a first radio access technology (RAT), that a temperature of a user equipment (UE) has reached a first temperature threshold less than a second temperature threshold at which the UE limits service in the first RAT and greater than a third temperature threshold associated with a temperature mitigation level; and taking action to move the first SUB to a second RAT in response to the detecting, wherein taking action to move the first SUB to the second RAT comprises performing internal redirection of the first SUB from a cell of the first RAT to a cell of the second RAT based on one or more databases maintained at the UE.