# US 11,310,748 B2 · Dynamic power reduction requests for wireless communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,748 B2 - Document ID: US11310748B2 - Status: Granted - Kind: B2 - Application number: 17/175,294 - Filed: 2021-02-12 - Published: 2021-06-10 - Granted: 2022-04-19 - Earliest claimed: 2018-11-02 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Yakun Sun; Anatoliy S. Ioffe; Ehsan Haghani; Rohit U. Nabar - Web page: https://patentgrep.com/patent/US11310748B2 ## CPC - H04W 52/146: {Uplink power control} - H04W 52/365: {Power headroom reporting} - H04W 72/0473: {the resource being transmission power} - H04W 72/51: based on terminal or device properties - H04W 76/10: Connection setup - H04W 76/27: Transitions between radio resource control [RRC] states - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods and systems for controlling uplink (UL) transmission power of a user equipment (UE) electronic device includes determining, using the UE electronic device, that a maximum power availability for a transmission between the UE and a wireless network node is not appropriate to current conditions. Based on the determination that maximum power availability is not appropriate the UE electronic device sends a request to the wireless network node to reduce power for communication with the wireless network node. Based on the request, the UE electronic device communicates at a reduced power level for communications with the wireless network node. ## Claims ### Claim 1 An electronic device, comprising: one or more antennas configured to communicate with one or more wireless network nodes; and memory storing instructions that, when executed by one or more processors, are configured to cause the one or more processors to: encode maximum allowed transmit power (PCMAX) values to incorporate power reductions for a plurality of cells through which the electronic device connects to one or more wireless networks; cause the one or more antennas to transmit the PCMAX values from the electronic device to respective cells of the plurality of cells using power headroom reports; and cause the one or more antennas to communicate with a cell of the plurality of cells using a permissible power usage level corresponding to a respective power headroom report of the power headroom reports. ### Claim 2 (depends on 1) The electronic device of claim 1, the PCMAX values comprising PCMAX values for a plurality of carrier frequencies for at least one of the cells of the plurality of cells. ### Claim 3 (depends on 1) The electronic device of claim 1, the plurality of cells comprising Next Generation NodeB (gNB) nodes. ### Claim 4 (depends on 1) The electronic device of claim 1, the PCMAX values being based at least in part on capabilities of the electronic device. ### Claim 5 (depends on 4) The electronic device of claim 4, the capabilities being used to determine the power reductions prior to establishing communication with at least one of the plurality of cells. ### Claim 6 (depends on 1) The electronic device of claim 1, the power reductions being based at least in part on battery usage or a temperature. ### Claim 7 (depends on 1) The electronic device of claim 1, the power reductions being based at least in part on a human body entering into proximity of the electronic device and the human body being likely to be exposed to wireless signals above a maximum permissive exposure (MPE) limit unless transmission power is reduced. ### Claim 8 (depends on 7) The electronic device of claim 7, the proximity comprising a determination that the human body is in a communication path between the electronic device and at least one of the plurality of cells. ### Claim 9 (depends on 1) The electronic device of claim 1, the power reductions comprising reduced duty cycles for uplink communications between the electronic device and the plurality of cells. ### Claim 10 (depends on 1) The electronic device of claim 1, the power reductions comprising a reduced peak power used in uplink communications between the electronic device and the plurality of cells. ### Claim 11 A method, comprising: encode, using one or more processors, a maximum allowed transmit power (PCMAX) values incorporating power reductions for a plurality of cells through which a user equipment device (UE) connects to one or more wireless networks; transmit, using one or more antennas, PCMAX values from the UE to respective cells of the plurality of cells using power headroom reports; and communicate, using the one or more antennas, with a cell of the plurality of cells using a permissible power usage level corresponding to a respective power headroom report of the power headroom reports. ### Claim 12 (depends on 11) The method of claim 11, the power reductions comprising a maximum duty cycle restriction that restricts communications between the UE and the plurality of cells to less than or equal to a target duty cycle. ### Claim 13 (depends on 12) The method of claim 12, the maximum duty cycle restriction specifying a maximum uplink duty cycle between the UE and the plurality of cells. ### Claim 14 (depends on 12) The method of claim 12, applying a power back-off (P-MPR) when an allocated percentage of UL symbols exceed the maximum duty cycle restriction. ### Claim 15 (depends on 11) The method of claim 11, the power reductions comprising a reduced peak power used in uplink communications between the UE and the plurality of cells. ### Claim 16 (depends on 11) The method of claim 11, the PCMAX values comprising PCMAX values for a plurality of carrier frequencies for at least one of the cells of the plurality of cells. ### Claim 17 (depends on 16) The method of claim 16, the PCMAX values being different for at least two carrier frequencies of the plurality of carrier frequencies. ### Claim 18 (depends on 11) The method of claim 11, the power reductions being based at least in part on a human body entering into proximity of the UE and the human body being likely to be exposed to wireless signals above a maximum permissive exposure (MPE) limit unless transmission power is reduced. ### Claim 19 (depends on 18) The method of claim 18, the proximity comprising a determination that the human body is in a communication path between the UE and at least one of the plurality of cells. ### Claim 20 (depends on 11) The method of claim 11, the PCMAX values being different for at least two cells of the plurality of cells.