# US 12,764,754 B2 · Systems and methods of triggering active mode UE power saving > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,764,754 B2 - Document ID: US12764754B2 - Status: Granted - Kind: B2 - Application number: 18/752,251 - Filed: 2024-06-24 - Published: 2024-10-24 - Granted: 2026-10-13 - Earliest claimed: 2020-10-15 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Huaning Niu; Chunxuan Ye; Dawei Zhang; Haitong Sun; Hong He; Oghenekome Oteri; Sigen Ye; Wei Zeng; Weidong Yang; Yushu Zhang - Web page: https://patentgrep.com/patent/US12764754B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - 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) ## Abstract Embodiments herein describe systems, apparatuses, and methods for adapting physical downlink control channel (PDCCH) monitoring behaviors. In some embodiments, a network node and a UE use search space set group switching to change PDCCH monitoring behavior. In some embodiments, a network node and a UE use PDCCH skipping to change PDCCH monitoring behavior. The PDCCH monitoring behavior may be indicated in a downlink control indicator (DCI). ## Claims ### Claim 1 A method for a user equipment (UE), the method comprising: receiving a search space configuration comprising a default search space set in a bandwidth part and a second search space set for the same bandwidth part as the default search space set; monitoring physical downlink control channel (PDCCH) according to the default search space set; receiving a scheduling downlink control information (DCI) comprising one bit for a search space switch indication indicating to change search spaces to the second search space set within the same bandwidth part as the default search space set; changing PDCCH monitoring according to the second search space set within the same bandwidth part as the default search space set in response to receiving the search space switch indication; receiving a second scheduling DCI message, the second scheduling DCI message including a skipping indication; determining a time to apply skipping for the PDDCH monitoring as a result of the skipping indication; and applying the skipping for the PDCCH for a preconfigured number of slots at the determined time, wherein the skipping is applied right after the second scheduling DCI is received as soon as the UE determines the skipping indication is included in the second scheduling DCI, wherein for downlink communication, the skipping is canceled based on a negative-acknowledgement (NACK) message, wherein when the NACK message is transmitted, by the UE, the skipping is canceled, wherein for uplink communication, the skipping is applied when drx-HARQRTTTimerUL expires. ### Claim 2 (depends on 1) The method of claim 1, wherein the skipping is applied after the second scheduling DCI is received and processed. ### Claim 3 (depends on 1) The method of claim 1, wherein for the downlink communication, the skipping is applied based on an acknowledgement (ACK) message, wherein when the ACK message is transmitted, the skipping is applied after the ACK. ### Claim 4 (depends on 1) The method of claim 1, further comprising monitoring a drx-retransmissionTimerUL, and wherein the skipping is applied after the drx-retransmissionTimerUL expires. ### Claim 5 (depends on 1) The method of claim 1, further comprising: waking after skipping a preconfigured number of slots; monitoring the PDCCH for a period of time; and if no scheduling DCI is received, skipping another pre-configured number of slots. ### Claim 6 (depends on 1) The method of claim 1, further comprising receiving a non-schedule DCI comprising a skip indication field indicating whether the UE should apply PDCCH monitoring skipping for another pre-configured number of slots. ### Claim 7 A baseband processor of a user equipment (UE) comprising: circuitry configured to: receive a search space configuration comprising a default search space set in a bandwidth part and a second search space set for the same bandwidth part as the default search space set; monitor physical downlink control channel (PDCCH) according to the default search space set; receive a scheduling downlink control information (DCI) comprising one bit for a search space switch indication indicating to change search spaces to the second search space set within the same bandwidth part as the default search space set; change PDCCH monitoring according to the second search space set in response to receiving the search space switch indication; receive a second scheduling DCI message, the second scheduling DCI message including a skipping indication; determine a time to apply skipping for the PDDCH monitoring as a result of the skipping indication; and apply the skipping for the PDCCH for a preconfigured number of slots at the determined time, wherein the skipping is applied right after the second scheduling DCI is received as soon as the UE determines the skipping indication is included in the second scheduling DCI, wherein for downlink communication, the skipping is canceled based on a negative-acknowledgement (NACK) message, wherein when the NACK message is transmitted, by the UE, the skipping is canceled, wherein for uplink communication, the skipping is applied when drx-HARQRTTTimerUL expires. ### Claim 8 (depends on 7) The baseband processor of claim 7, wherein the skipping is applied after the scheduling DCI is received and processed. ### Claim 9 (depends on 7) The baseband processor of claim 7, wherein for the downlink communication, the skipping is applied based on an acknowledgement (ACK) message, wherein when the ACK message is transmitted, the skipping is applied after the ACK. ### Claim 10 (depends on 7) The baseband processor of claim 7, wherein the circuitry is further configured to monitor a drx-retransmissionTimerUL, and wherein the skipping is applied after the drx-retransmissionTimerUL expires. ### Claim 11 (depends on 7) The baseband processor of claim 7, wherein the circuitry is further configured to: wake after skipping a preconfigured number of slots; monitor the PDCCH for a period of time; and if no scheduling DCI is received, skip another pre-configured number of slots. ### Claim 12 A non-transitory computer-readable storage medium including instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to: receive a search space configuration comprising a default search space set in a bandwidth part and a second search space set for the same bandwidth part as the default search space set; monitor physical downlink control channel (PDCCH) according to the default search space set; receive a scheduling downlink control information (DCI) comprising one bit for a search space switch indication indicating to change search spaces to the second search space set within the same bandwidth part as the default search space set; change PDCCH monitoring according to the second search space set within the same bandwidth part as the default search space set in response to receiving the search space switch indication; receive a second scheduling DCI message, the second scheduling DCI message including a skipping indication; determine a time to apply skipping for the PDDCH monitoring as a result of the skipping indication; and apply the skipping for the PDCCH for a preconfigured number of slots at the determined time, wherein the skipping is applied right after the second scheduling DCI is received as soon as the UE determines the skipping indication is included in the second scheduling DCI, wherein for downlink communication, the skipping is canceled based on a negative-acknowledgement (NACK) message, by the UE, wherein when the NACK message is transmitted, the skipping is canceled, wherein for uplink communication, the skipping is applied when drx-HARQRTTTimerUL expires.