# US 11,910,395 B2 · Indication of power boosting for physical downlink control channel and its impact on search space > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,395 B2 - Document ID: US11910395B2 - Status: Granted - Kind: B2 - Application number: 17/374,324 - Filed: 2021-07-13 - Published: 2022-02-17 - Granted: 2024-02-20 - Earliest claimed: 2020-08-13 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Mahmoud Taherzadeh Boroujeni; Tao Luo - Web page: https://patentgrep.com/patent/US11910395B2 ## CPC - H04W 52/143: {Downlink power control} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/0038: {Blind format detection (for detection of modulation format H04L27/0012)} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/0219: {where the power saving management affects multiple terminals} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 52/028: {switching on or off only a part of the equipment circuit blocks} - H04W 52/04: Transmission power control [TPC] - H04W 52/325: {Power control of control or pilot channels} - H04W 52/346: {distributing total power among users or channels} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 1/0001: {Systems modifying transmission characteristics according to link quality, e.g. power backoff (adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04)} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0092: {Indication of how the channel is divided} - 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) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 Aspects presented herein may improve the efficiency of power boosting of PDCCH by a base station and the blind PDCCH detection/decoding performed by a UE. In one aspect, the UE receives, from a base station, a power boost indication for a PDCCH. The UE determines at least one search space based on the power boost indication from the base station. The UE monitors for the PDCCH with the indicated power boost from the base station in the at least one search space. In another aspect, a base station transmits, to a UE, a power boost indication for a PDCCH. The base station applies a power boost to the PDCCH. The base station transmits the PDCCH with the power boost to the UE. ## Claims ### Claim 1 An apparatus for wireless communication at a user equipment (UE), comprising: memory; and at least one processor coupled to the memory and configured to: receive, from a base station, a power boost indication for a physical downlink control channel (PDCCH); transmit a request to lower a carrier aggregation level for one or more PDCCH candidates or an indication of a recommended carrier aggregation level for the one or more PDCCH candidates; restrict a number of search spaces for performing blind decoding of the PDCCH based on the power boost indication; monitor for the PDCCH with the indicated power boost from the base station in the restricted number of search spaces based on the power boost; and perform the blind decoding for at least a subset of the one or more PDCCH candidates with lowered carrier aggregation level or the recommended carrier aggregation level based on the request or the indication. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein to receive the power boost indication, the at least one processor is configured to: receive the power boost indication in a group common downlink control information (DCI), a UE specific DCI, or a downlink media access control (MAC) control element (CE). ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the one or more PDCCH candidates are associated with one or more carrier aggregation levels. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein the one or more PDCCH candidates have the carrier aggregation levels below a threshold. ### Claim 5 (depends on 3) The apparatus of claim 3, wherein the at least one processor is further configured to: receive a configuration of the carrier aggregation levels for the one or more PDCCH candidates based on a power boost associated with each carrier aggregation level. ### Claim 6 (depends on 3) The apparatus of claim 3, wherein the at least one processor is further configured to: receive a configuration of the carrier aggregation levels for the one or more PDCCH candidates based on the request or the indication. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein to transmit the request, the at least one processor is configured to transmit the request to the base station via an uplink control information (UCI) or an uplink media access control (MAC) control element (CE). ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the at least one processor is further configured to: indicate, to the base station, a UE capability or a power consumption limitation; and perform the blind decoding for the one or more PDCCH candidates with a second carrier aggregation level below a threshold based on the UE capability or the power consumption limitation. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the UE capability is a reduced UE capability. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the power boost indication applies to each search space for the PDCCH. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the power boost indication applies to a subset of search spaces for the PDCCH. ### Claim 12 (depends on 1) The apparatus of claim 1, further comprising a transceiver coupled to the at least one processor, wherein to receive the power boost indication, the at least one processor is configured to receive the power boost indication via the transceiver. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the at least one processor is configured individually or in combination to receive the power boost indication, transmit the request or the indication, restrict the number of search spaces, and monitor for the PDCCH in the restricted number of search spaces, and perform the blind decoding. ### Claim 14 A method of wireless communication at a user equipment (UE), comprising: receiving, from a base station, a power boost indication for a physical downlink control channel (PDCCH); transmitting a request to lower a carrier aggregation level for one or more PDCCH candidates or an indication of a recommended carrier aggregation level for the one or more PDCCH candidates; restricting a number of search spaces for performing blind decoding of the PDCCH based on the power boost indication; monitoring for the PDCCH with the indicated power boost from the base station in the restricted number of search spaces based on the power boost indication from the base station; and performing the blind decoding for at least a subset of the one or more PDCCH candidates with lowered carrier aggregation level or the recommended carrier aggregation level based on the request or the indication. ### Claim 15 (depends on 14) The method of claim 14, wherein the one or more PDCCH candidates are associated with one or more carrier aggregation levels. ### Claim 16 (depends on 15) The method of claim 15, wherein the one or more PDCCH candidates have the carrier aggregation levels below a threshold. ### Claim 17 (depends on 15) The method of claim 15, further comprising: receiving a configuration of the carrier aggregation levels for the one or more PDCCH candidates based on a power boost associated with each carrier aggregation level. ### Claim 18 (depends on 15) The method of claim 15, further comprising: receive a configuration of the carrier aggregation levels for the one or more PDCCH candidates based on the request or the indication. ### Claim 19 (depends on 14) The method of claim 14, further comprising: indicating, to the base station, a UE capability or a power consumption limitation; and monitoring for the one or more PDCCH candidates with a second carrier aggregation level below a threshold based on the UE capability or the power consumption limitation. ### Claim 20 An apparatus for wireless communication at a base station, comprising: memory; and at least one processor coupled to the memory and configured to: transmit a power boost indication for a physical downlink control channel (PDCCH); receive a request to lower a carrier aggregation level for one or more PDCCH candidates associated with the PDCCH or an indication recommending the carrier aggregation level for the one or more PDCCH candidates associated with the PDCCH based on the power boost indication; apply a power boost to the one or more PDCCH candidates associated with the PDCCH; and transmit the one or more PDCCH candidates associated with the PDCCH with the power boost and with lowered carrier aggregation level or recommended carrier aggregation level based on the request or the indication. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein to transmit the power boost indication, the at least one processor is configured to transmit the power boost indication in a group common downlink control information (DCI), a UE specific DCI or a downlink media access control (MAC) control element (CE). ### Claim 22 (depends on 20) The apparatus of claim 20, wherein to apply the power boost, the at least one processor is configured to apply the power boost as a power concentrate over a control resource set (CORESET) bandwidth in which the PDCCH is transmitted or the power boost is applied to the PDCCH. ### Claim 23 (depends on 20) The apparatus of claim 20, wherein the at least one processor is further configured to: transmit a configuration of the carrier aggregation level for at least a subset of one or more PDCCH candidates based on the power boost associated with each carrier aggregation level. ### Claim 24 (depends on 20) The apparatus of claim 20, wherein to receive the request or the indication, the at least one processor is configured to receive the request or the indication via an uplink control information (UCI) or an uplink media access control (MAC) control element (CE). ### Claim 25 (depends on 20) The apparatus of claim 20, wherein the at least one processor is further configured to: Receive a UE capability or a power consumption limitation, wherein the one or more PDCCH candidates are transmitted with the carrier aggregation level below a threshold based on the UE capability or the power consumption limitation. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein the UE capability is a reduced UE capability. ### Claim 27 (depends on 20) The apparatus of claim 20, wherein the power boost indication applies to each search space for the PDCCH. ### Claim 28 (depends on 20) The apparatus of claim 20, wherein the power boost indication applies to a subset of search spaces for the PDCCH. ### Claim 29 (depends on 20) The apparatus of claim 20, further comprising a transceiver coupled to the at least one processor. ### Claim 30 (depends on 20) The apparatus of claim 20, wherein the at least one processor is configured individually or in combination to transmit the power boost indication, receive the request to lower the carrier aggregation level, apply the power boost to the one or more PDCCH candidates, and transmit the one or more PDCCH candidates. ### Claim 31 A method of wireless communication at a base station, comprising: transmitting a power boost indication for a physical downlink control channel (PDCCH); receiving, from a user equipment (UE), a request to lower a carrier aggregation level for one or more PDCCH candidates associated with the PDCCH or an indication recommending the carrier aggregation level for the one or more PDCCH candidates associated with the PDCCH based on the power boost indication; applying a power boost to the one or more PDCCH candidates associated with the PDCCH; and transmitting the one or more PDCCH candidates associated with the PDCCH with the power boost and with lowered carrier aggregation level or recommended carrier aggregation level based on the request or the indication.