# US 2021/0345342 A1 · User equipment (ue) requested control resource set (coreset)/search space (ss) sets > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345342 A1 - Document ID: US20210345342A1 - Status: Published application - Kind: A1 - Application number: 17/243,278 - Filed: 2021-04-28 - Published: 2021-11-04 - Earliest claimed: 2020-04-29 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Iyab Issam SAKHNINI; Tao LUO; Qiang WU; Juan MONTOJO; Wanshi CHEN; Wooseok NAM; Mahmoud TAHERZADEH BOROUJENI; Linhai HE; Hwan Joon KWON; Peter Pui Lok ANG - Web page: https://patentgrep.com/patent/US20210345342A1 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/53: based on regulatory allocation policies - H04B 7/06958: {Multistage beam selection, e.g. beam refinement} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 25/0226: {sounding signals per se} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract A method of wireless communications by a user equipment (UE) includes transmitting a request for action for at least one control resource set (CORESET) and associated search space. The action may include configuring, activating, and/or deactivating the at least one CORESET and associated search space. The CORESET may be a dynamic CORESET with a predefined number of search space occasions or a semi-static CORESET. The method also includes communicating in accordance with the request. The request is transmitted using at least one of an uplink radio resource control (RRC) message, a physical uplink control channel (PUCCH), a sounding reference signal (SRS), a random access channel (RACH), or a physical uplink shared channel (PUSCH). The UE may switch, in connection with the request, to a bandwidth part (BWP) configured for the UE. ## Claims ### Claim 1 A method of wireless communications by a user equipment (UE), comprising: transmitting a request for action for at least one control resource set (CORESET) and associated search space set, the action comprises configuring, activating, and/or deactivating the at least one CORESET and associated search space, the at least one CORESET comprising a dynamic CORESET with a predefined number of search space occasions or a semi-static CORESET; and communicating in accordance with the request. ### Claim 2 (depends on 1) The method of claim 1, further comprising receiving radio resource control (RRC) signaling indicating a plurality of preconfigured candidate CORESETs and associated candidate search spaces, in which the request is for at least one of the preconfigured candidate CORESETs and associated search spaces. ### Claim 3 (depends on 1) The method of claim 1, further comprising receiving radio resource control (RRC) signaling mapping CORESETs to occasions, in which the request comprises implicit signaling including a first transmission during a random access channel (RACH) occasion or a second transmission during a scheduling request (SR) occasion. ### Claim 4 (depends on 1) The method of claim 1, further comprising starting monitoring for the at least one CORESET a predefined time after transmitting the request, the predefined time being network configured, requested by the UE, or based on a UE capability. ### Claim 5 (depends on 1) The method of claim 1, further comprising receiving a PDCCH (physical downlink control channel) in a requested search space, the receiving comprising receiving an acknowledgment of the request. ### Claim 6 (depends on 1) The method of claim 1, further comprising stopping monitoring for the at least one CORESET after failing to decode a predetermined number of PDCCHs (physical downlink control channels) after transmitting the request, in which the predetermined number of PDCCHs begin a predetermined time after transmitting the request. ### Claim 7 (depends on 1) The method of claim 1, further comprising: receiving a deny message in a first search space occasion after transmitting the request; and stopping monitoring additional search space occasions related to the request in response to receiving the deny message. ### Claim 8 (depends on 1) The method of claim 1, further comprising deactivating the at least one CORESET and associated search space set based on a first set of parameters in the request or a second set of parameters in a first downlink control information (DCI) message received after transmitting the request, the first set of parameters or the second set of parameters defining a validity of the CORESET, the validity including a number of occurrences of the at least one CORESET and associated search space. ### Claim 9 (depends on 1) The method of claim 1, further comprising deactivating the at least one CORESET and associated search space set based on explicit signaling comprising a UE request including a media access control-control element (MAC-CE). ### Claim 10 (depends on 1) The method of claim 1, further comprising deactivating the at least one CORESET and associated search space set based on explicit signaling comprising a network indication received in a grant including downlink control information (DCI) or downlink control information (DCI) without a grant, the DCI including downlink format information (DFI) to indicate the deactivating. ### Claim 11 (depends on 1) The method of claim 1, further comprising deactivating the at least one CORESET and associated search space set based on implicit information comprising expiration of a timer measuring physical downlink control channel (PDCCH) inactivity or a BSR (buffer status report). ### Claim 12 (depends on 1) The method of claim 1, further comprising deactivating the at least one CORESET and associated search space set based on a configured number of occurrences when the CORESET is the dynamic CORESET. ### Claim 13 (depends on 1) The method of claim 1, further comprising switching, in connection with the request, to a bandwidth part (BWP) configured for the UE. ### Claim 14 (depends on 13) The method of claim 13, in which the request includes a CORESET ID or a search space set ID, and the BWP configured for the UE is associated with the CORESET ID or the search space set ID. ### Claim 15 (depends on 13) The method of claim 13, further comprising: monitoring for a physical downlink control channel (PDCCH) on the BWP; and switching back to a previous BWP if the PDCCH is not received for at least one of a number of search space set occasions or a duration of time, according to a configuration for the number of search space set occasions or the duration of time prior to transmitting the request. ### Claim 16 (depends on 13) The method of claim 13, further comprising: receiving a denial in response to the request; and switching back to a previous BWP in response to receiving the denial; or remaining on the BWP in response to receiving the denial. ### Claim 17 (depends on 13) The method of claim 13, further comprising: receiving, prior to transmitting the request, a configuration that indicates whether to remain on the BWP following the request; receiving a denial in response to the request; and remaining on the BWP or switching to a prior BWP in response to the denial, based on the configuration. ### Claim 18 (depends on 13) The method of claim 13, further comprising: switching back to a previous BWP in response to a deactivation of the CORESET of the search space set; or remaining on the BWP after a deactivation of the CORESET or the search space set. ### Claim 19 (depends on 13) The method of claim 13, further comprising: receiving, prior to transmitting the request, a configuration that indicates whether to remain on the BWP following a deactivation of the CORESET or the search space set; and remaining on the BWP or switching to a prior BWP following the deactivation of the CORESET or the search space set based on the configuration. ### Claim 20 (depends on 13) The method of claim 13, further comprising monitoring for the CORESET or the search space set on the BWP, in which a period between the UE sending the request and starting to monitor for the CORESET or the search space set is based, at least in part, on a BWP switch time for switching to the BWP. ### Claim 21 (depends on 1) The method of claim 1, in which the request is transmitted using at least one of an uplink radio resource control (RRC) message, a physical uplink control channel (PUCCH), a sounding reference signal (SRS), a random access channel (RACH), or a physical uplink shared channel (PUSCH). ### Claim 22 (depends on 21) The method of claim 21, in which the request indicates a duration or a number of occurrences of the CORESET or the search space set associated with the request. ### Claim 23 (depends on 21) The method of claim 21, in which the request indicates one or more parameters for the CORESET or the search space set, the one or more parameters including at least one of: an aggregation level, a physical downlink control channel (PDCCH) candidate, a number of PDCCH candidates, a transmission configuration indicator (TCI) state for the PDCCH, or a repetition for the PDCCH. ### Claim 24 (depends on 21) The method of claim 21, in which the request is multiplexed with a scheduling request (SR), channel state information (CSI), or hybrid automatic repeat request (HARD) feedback from the UE. ### Claim 25 (depends on 21) The method of claim 21, further comprising retransmitting the request in response to a reply not being received from a base station, the UE transmitting the request up to a configured threshold number of attempts. ### Claim 26 (depends on 21) The method of claim 21, further comprising: receiving a configuration to transmit one or more repetitions of the request; and transmitting the one or more repetitions of the request based on the configuration, the UE transmitting the request and the one or more repetitions of the request using a same transmission beam. ### Claim 27 (depends on 26) The method of claim 26, in which the same transmission beam is based on a prior sounding reference signal indicator (SRI) or a prior uplink transmission beam. ### Claim 28 (depends on 21) The method of claim 21, further comprising: receiving a configuration to transmit one or more repetitions of the request; and transmitting the one or more repetitions of the request based on the configuration, the UE transmitting the request and the one or more repetitions of the request each using a different transmission beam. ### Claim 29 (depends on 21) The method of claim 21, further comprising performing a sounding reference signal (SRS) beam refinement procedure before transmitting the request or after transmitting the request. ### Claim 30 (depends on 29) The method of claim 29, further comprising receiving, prior to transmitting the request, a configuration to perform the SRS beam refinement procedure in connection with transmitting the request.