# US 12,225,460 B2 · Update of physical downlink control channel (PDCCH) parameters > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,460 B2 - Document ID: US12225460B2 - Status: Granted - Kind: B2 - Application number: 17/249,251 - Filed: 2021-02-24 - Published: 2021-08-26 - Granted: 2025-02-11 - Earliest claimed: 2020-02-26 - Assignees: QUALCOMM Incorporated - Applicants: Qualcomm Incorporated - Inventors: Yan Zhou; Iyab Issam Sakhnini; Tao Luo - Web page: https://patentgrep.com/patent/US12225460B2 ## CPC - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/51: based on terminal or device properties - 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 Wireless communications systems and methods related to updating a physical downlink control channel (PDCCH) monitoring parameter are provided. A user equipment (UE) determines a PDCCH monitoring parameter based on a current operating parameter. The UE transmits a PDCCH monitoring configuration request including the PDCCH monitoring parameter to a base station (BS). The BS may adjust the PDCCH monitoring parameter in accordance with the PDCCH monitoring configuration request. The UE may monitor PDCCH based on the PDCCH monitoring parameter. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: transmitting, to a network unit, a capability report of the UE, the capability report specifying a first value for a physical downlink control channel (PDCCH) monitoring parameter, wherein the PDCCH monitoring parameter is one of a maximum number of monitored PDCCH candidates or a maximum number of non-overlapping control channel elements (CCEs); transmitting, to the network unit in response to a trigger based on a current operating parameter of the UE, a PDCCH monitoring configuration request including a second value for the PDCCH monitoring parameter less than the first value based on the current operating parameter of the UE; receiving, from the network unit, a response to the PDCCH monitoring configuration request including a third value for the PDCCH monitoring parameter different than the second value, wherein the response includes an indication indicating a set of selected PDCCH candidate indices based on priorities of PDCCH candidates associated with a PDCCH candidate index; and monitoring for a PDCCH using the third value for the PDCCH monitoring parameter. ### Claim 2 (depends on 1) The method of claim 1, wherein the PDCCH monitoring parameter includes a maximum number of monitored PDCCH candidates per-slot that is supported by the UE. ### Claim 3 (depends on 1) The method of claim 1, wherein the PDCCH monitoring parameter includes a maximum number of monitored PDCCH candidates for a span that is supported by the UE, the span having a periodicity and a duration specifying a period of time defined in terms of symbols. ### Claim 4 (depends on 1) The method of claim 1, wherein the PDCCH monitoring parameter includes a maximum number of non-overlapping control channel elements (CCEs) per-slot that is supported by the UE. ### Claim 5 (depends on 1) The method of claim 1, wherein the PDCCH monitoring parameter includes a maximum number of non-overlapping CCEs for a span that is supported by the UE, the span having a periodicity and a duration specifying a period of time defined in terms of symbols. ### Claim 6 (depends on 1) The method of claim 1, wherein the transmitting the PDCCH monitoring configuration request includes transmitting the PDCCH monitoring configuration request via a media access control-control element (MAC-CE), a radio resource control (RRC) message, or uplink control information (UCI). ### Claim 7 (depends on 1) The method of claim 1, wherein the current operating parameter is related to current operations at the UE. ### Claim 8 (depends on 7) The method of claim 7, wherein the current operating parameter includes at least one of channel characteristics, battery usage at the UE, a remaining battery life at the UE, or traffic patterns at the UE. ### Claim 9 A user equipment (UE), comprising: a memory; a transceiver; and at least one processor coupled to the memory and the transceiver, wherein the at least one processor is configured, alone or in any combination, to cause the UE to: transmit, to a network unit, a capability report of the UE, the capability report specifying a first value for a physical downlink control channel (PDCCH) monitoring parameter, wherein the PDCCH monitoring parameter is one of a maximum number of monitored PDCCH candidates or a maximum number of non-overlapping control channel elements (CCEs); transmit, to the network unit in response to a trigger based on a current operating parameter of the UE, a PDCCH monitoring configuration request including a second value for the PDCCH monitoring parameter less than the first value based on the current operating parameter of the UE; receive a response to the PDCCH monitoring configuration request including a third value for the PDCCH monitoring parameter different than the second value, wherein the response includes an indication indicating a set of selected PDCCH candidate indices based on priorities of PDCCH candidates associated with a PDCCH candidate index; and monitor for a PDCCH using the third value for the PDCCH monitoring parameter. ### Claim 10 (depends on 9) The UE of claim 9, wherein the PDCCH monitoring parameter includes a maximum number of monitored PDCCH candidates per-slot that is supported by the UE. ### Claim 11 (depends on 9) The UE of claim 9, wherein the PDCCH monitoring parameter includes a maximum number of monitored PDCCH candidates for a span that is supported by the UE, and wherein the span has a periodicity and a duration specifying a period of time defined in terms of symbols. ### Claim 12 (depends on 9) The UE of claim 9, wherein the PDCCH monitoring parameter includes a maximum number of non-overlapping control channel elements (CCEs) per-slot that is supported by the UE. ### Claim 13 (depends on 9) The UE of claim 9, wherein the PDCCH monitoring parameter includes a maximum number of non-overlapping CCEs for a span that is supported by the UE, and wherein the span has a periodicity and a duration specifying a period of time defined in terms of symbols. ### Claim 14 (depends on 9) The UE of claim 9, wherein the UE is further configured to: transmit the PDCCH monitoring configuration request via a media access control-control element (MAC-CE), a radio resource control (RRC) message, or uplink control information (UCI). ### Claim 15 (depends on 9) The UE of claim 9, wherein the current operating parameter is related to current operations at the UE. ### Claim 16 (depends on 15) The UE of claim 15, wherein the current operating parameter includes at least one of channel characteristics, battery usage at the UE, a remaining battery life at the UE, or traffic patterns at the UE. ### Claim 17 A non-transitory computer-readable medium having program code recorded thereon executable by one or more processors for wireless communication by a user equipment (UE), the program code comprising: code for causing the UE to transmit, to a network unit, a capability report of the UE, the capability report specifying a first value for a physical downlink control channel (PDCCH) monitoring parameter, wherein the PDCCH monitoring parameter is one of a maximum number of monitored PDCCH candidates or a maximum number of non-overlapping control channel elements (CCEs); code for causing the UE to transmit to the network unit in response to a trigger based on a current operating parameter of the UE, a PDCCH monitoring configuration request including a second value for the PDCCH monitoring parameter less than the first value based on the current operating parameter of the UE; code for causing the UE to receive a response to the PDCCH monitoring configuration request including a third value for the PDCCH monitoring parameter different than the second value, wherein the response includes an indication indicating a set of selected PDCCH candidate indices based on priorities of PDCCH candidates associated with a PDCCH candidate index; and code for causing the UE to monitor, for a PDCCH using the third value for the PDCCH monitoring parameter. ### Claim 18 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein the PDCCH monitoring parameter includes at least one of a maximum number of monitored PDCCH candidates per-slot that is supported by the UE, a maximum number of monitored PDCCH candidates for a span that is supported by the UE, a maximum number of non-overlapping control channel elements (CCEs) per-slot that is supported by the UE, or a maximum number of non-overlapping CCEs for the span that is supported by the UE, the span having a periodicity and a duration specifying a period of time defined in terms of symbols. ### Claim 19 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein the code for causing the UE to transmit the PDCCH monitoring configuration request includes program code causing the UE to transmit the PDCCH monitoring configuration request via a media access control-control element (MAC-CE), a radio resource control (RRC) message, or uplink control information (UCI). ### Claim 20 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein the current operating parameter is related to current operations at the UE. ### Claim 21 (depends on 20) The non-transitory computer-readable medium of claim 20, wherein the current operating parameter includes at least one of channel characteristics, battery usage at the UE, a remaining battery life at the UE, or traffic patterns at the UE. ### Claim 22 An apparatus, comprising: means for transmitting, to a network unit, a capability report of a user equipment (UE), the capability report specifying a first value for a physical downlink control channel (PDCCH) monitoring parameter, wherein the PDCCH monitoring parameter is one of a maximum number of monitored PDCCH candidates or a maximum number of non-overlapping control channel elements (CCEs); means for transmitting, by the UE to the network unit in response to a trigger based on a current operating parameter of the UE, a PDCCH monitoring configuration request including a second value for the PDCCH monitoring parameter less than the first value based on the current operating parameter of the UE; means for receiving a response to the PDCCH monitoring configuration request including a third value for the PDCCH monitoring parameter different than the second value, wherein the response includes an indication indicating a set of selected PDCCH candidate indices based on priorities of PDCCH candidates associated with a PDCCH candidate index; and means for monitoring, by the UE, for a PDCCH using the third value for the PDCCH monitoring parameter.