# US 2021/0345238 A1 · Power management in wireless modems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345238 A1 - Document ID: US20210345238A1 - Status: Published application - Kind: A1 - Application number: 17/144,398 - Filed: 2021-01-08 - Published: 2021-11-04 - Earliest claimed: 2020-04-29 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Firouz Behnamfar; Faraz Faheem; Farouk Belghoul; Rema Vaidyanathan - Web page: https://patentgrep.com/patent/US20210345238A1 ## CPC - H04W 52/00: Power management {, e.g. Transmission Power Control [TPC] or power classes} - G06F 1/206: {comprising thermal management} - G06F 1/28: Supervision thereof, e.g. detecting power-supply failure by out of limits supervision - G06F 1/3278: {Power saving in modem or I/O interface} - G06F 1/3296: by lowering the supply or operating voltage - H04W 4/20: Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel - Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management - 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) - 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 Techniques discussed herein can facilitate power management at a User Equipment (UE) via selection of a power management stage based on a current power status. One example aspect is a UE comprising one or more processors configured to: monitor a temperature of the UE via one or more temperature sensors and a power usage of the UE; determine a power status of the UE based at least in part on the temperature of the UE and the power usage of the UE; select, based at least in part on the determined power status, a power management stage of a plurality of power management stages; and implement one or more power management techniques associated with the selected power management stage. A notification can be triggered to alert a user that the processor is implementing the one or more power management techniques prior to implementation. ## Claims ### Claim 1 A processor of a user equipment (UE) comprising processing circuitry configured to: monitor a temperature of the UE via one or more temperature sensors and a power usage of the UE; determine a power status of the UE based at least in part on the temperature of the UE and the power usage of the UE; select, based at least in part on the determined power status, a power management stage of a plurality of power management stages; and implement one or more power management techniques associated with the selected power management stage. ### Claim 2 (depends on 1) The processor of claim 1, wherein, prior to implementing the one or more power management techniques, the processing circuitry is further configured to trigger a notification to alert a user that the processor is implementing the one or more power management techniques. ### Claim 3 (depends on 1) The processor of claim 1, wherein the selected power management stage is a low power New Radio (NR) stage, and wherein the one or more power management techniques associated with the low power NR stage comprise one or more of: limiting NR operation to Frequency Range 1, employing low-power beam management, employing a reduced number of beams for beam tracking, performing power-efficient beam selection, performing low-power measurements, or applying a reduced Bandwidth Part size for NR. ### Claim 4 (depends on 1) The processor of claim 1, wherein the selected power management stage is a restricted New Radio (NR) mode stage, and wherein the one or more power management techniques associated with the restricted NR mode stage comprise one or more of: employing a reduced number of Component Carriers (CCs) for NR, employing a reduced number of spatial streams for NR, reporting a lowered value in a Power Headroom Report (PHR) for NR, employing one or more of Uplink (UL) throttling or transmit power capping for NR, employing Downlink (DL) throttling for NR, reporting a value lower than an accurate value in a Buffer Status Report (BSR) for NR, or suspending data communication in NR. ### Claim 5 (depends on 4) The processor of claim 4, wherein the processing circuitry is further configured to generate a NR OverheatingAssistance message in response to the restricted NR mode stage being selected and in response to a determination that the NR OverheatingAssistance message is supported. ### Claim 6 (depends on 1) The processor of claim 1, wherein the selected power management stage is a restricted Long Term Evolution (LTE) mode stage, and wherein the one or more power management techniques associated with the restricted LTE mode stage comprise one or more of: employing a reduced number of Component Carriers (CCs) for LTE, employing a reduced number of spatial streams for LTE, reporting a lowered value in a Power Headroom Report (PHR) for LTE, employing one or more of Uplink (UL) throttling or transmit power capping for LTE, employing Downlink (DL) throttling for LTE, reporting a value lower than an accurate value in a Buffer Status Report (BSR) for LTE, or suspending data communication in LTE. ### Claim 7 (depends on 6) The processor of claim 6, wherein the processor is further configured to generate an LTE OverheatingAssistance message in response to the restricted LTE mode stage being selected and in response to a determination that the LTE OverheatingAssistance message is supported. ### Claim 8 (depends on 1) The processor of claim 1, wherein the UE is concurrently connected to two or more Radio Access Technologies (RATs) comprising a New Radio (NR) RAT and a Long Term Evolution (LTE) RAT. ### Claim 9 A method, comprising: monitoring a temperature of the User Equipment (UE) via one or more temperature sensors and a power usage of the UE; determining a power status of the UE based at least in part on the temperature of the UE and the power usage of the UE; selecting, based at least in part on the determined power status, a power management stage of a plurality of power management stages; and implementing one or more power management techniques associated with the selected power management stage. ### Claim 10 (depends on 9) The method of claim 9, wherein, prior to implementing the one or more power management techniques, the method further comprises triggering a notification to alert a user that a processor is implementing the one or more power management techniques. ### Claim 11 (depends on 9) The method of claim 9, wherein the selected power management stage is a low power New Radio (NR) stage, and wherein the one or more power management techniques associated with the low power NR stage comprise one or more of: limiting NR operation to Frequency Range 1, employing low-power beam management, employing a reduced number of beams for beam tracking, performing power-efficient beam selection, performing low-power measurements, or applying a reduced Bandwidth Part size for NR. ### Claim 12 (depends on 9) The method of claim 9, wherein the selected power management stage is a restricted New Radio (NR) mode stage, and wherein the one or more power management techniques associated with the restricted NR mode stage comprise one or more of: employing a reduced number of Component Carriers (CCs) for NR, employing a reduced number of spatial streams for NR, reporting a lowered value in a Power Headroom Report (PHR) for NR, employing one or more of Uplink (UL) throttling or transmit power capping for NR, employing Downlink (DL) throttling for NR, reporting a value lower than an accurate value in a Buffer Status Report (BSR) for NR, or suspending data communication in NR. ### Claim 13 (depends on 9) The method of claim 9, wherein the selected power management stage is a lower power management stage than a current power management stage, and wherein the selected power management stage is selected based at least in part on the determined power status being lower than a first threshold value that is lower than a second threshold value associated with transition from the selected power management stage to the current power management stage. ### Claim 14 (depends on 9) The method of claim 9, wherein the selected power management stage is a lower power management stage than a current power management stage, and wherein the selected power management stage is selected based at least in part on the determined power status being lower than a first threshold value for at least a threshold amount of time. ### Claim 15 A User Equipment (UE), comprising: one or more temperature sensors; one or more processors configured to: monitor a temperature of the UE via the one or more temperature sensors and a power usage of the UE; determine a power status of the UE based at least in part on the temperature of the UE and the power usage of the UE; select, based at least in part on the determined power status, a power management stage of a plurality of power management stages; and implement one or more power management techniques associated with the selected power management stage. ### Claim 16 (depends on 15) The UE of claim 15, wherein, prior to implementing the one or more power management techniques, the one or more processors are further configured to trigger a notification to alert a user that the one or more processors are implementing the one or more power management techniques. ### Claim 17 (depends on 15) The UE of claim 15, wherein the selected power management stage is a low power New Radio (NR) stage, and wherein the one or more power management techniques associated with the low power NR stage comprise one or more of: limiting NR operation to Frequency Range 1, employing low-power beam management, employing a reduced number of beams for beam tracking, performing power-efficient beam selection, performing low-power measurements, or applying a reduced Bandwidth Part size for NR. ### Claim 18 (depends on 15) The UE of claim 15, wherein the selected power management stage is a restricted New Radio (NR) mode stage, and wherein the one or more power management techniques associated with the restricted NR mode stage comprise one or more of: employing a reduced number of Component Carriers (CCs) for NR, employing a reduced number of spatial streams for NR, reporting a lowered value in a Power Headroom Report (PHR) for NR, employing one or more of Uplink (UL) throttling or transmit power capping for NR, employing Downlink (DL) throttling for NR, reporting a value lower than an accurate value in a Buffer Status Report (BSR) for NR, or suspending data communication in NR. ### Claim 19 (depends on 15) The UE of claim 15, wherein the selected power management stage is a Long Term Evolution (LTE)-only stage, and wherein the one or more power management techniques associated with the LTE-only stage comprise deactivating New Radio (NR) communication at the UE. ### Claim 20 (depends on 15) The UE of claim 15, wherein the one or more power management techniques associated with the selected power management stage comprise deactivating New Radio (NR) communication at the UE and deactivating Long Term Evolution (LTE) communication at the UE.