# US 2026/0089657 A1 · Support of l1 and l2 signaling based mobility > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0089657 A1 - Document ID: US20260089657A1 - Status: Published application - Kind: A1 - Application number: 19/109,670 - Filed: 2022-09-30 - Published: 2026-03-26 - Earliest claimed: 2022-09-30 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Limited - Inventors: Bingchao Liu; Lianhai Wu; Ran Yue; Haiming Wang - Web page: https://patentgrep.com/patent/US20260089657A1 ## CPC - H04W 36/00835: {Determination of neighbour cell lists} - H04W 56/0015: {one node acting as a reference for the others} - H04B 7/0695: {using beam selection} - H04B 7/06968: {using quasi-colocation [QCL] between signals} - H04L 1/0026: {Transmission of channel quality indication} - H04L 1/1664: {the supervisory signal being transmitted together with payload signals; piggybacking} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 1/1896: {ARQ related signaling} - H04W 36/08: Reselecting an access point - H04W 72/231: the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling - H04W 36/0094: {Definition of hand-off measurement parameters} - H04W 80/02: Data link layer protocols - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Methods and apparatuses for support of L1 and L2 signaling based mobility are disclosed. In one embodiment, a UE comprises a transceiver; and a processor coupled to the transceiver, wherein the processor is configured to receive, via the transceiver, a DCI or a MAC CE indicating a serving cell change command for a target cell; and apply the target cell as the new serving cell after sending, via the transceiver, HARQ-ACK information for the DCI or the MAC CE. ## Claims ### Claim 1 A user equipment (UE), comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a downlink control information (DCI) DCI or a medium access control (MAC) control element (CE) MAC-C-E indicating a serving cell change command for a target cell; and apply the target cell as a new serving cell after sending hybrid automatic repeat request acknowledgment (HARQ-ACK) information for the DCI or the MAC CE. ### Claim 2 (depends on 1) The UE of claim 1, wherein the DCI indicates a unified transmission configuration indicator (TCI) state from activated two or more TCI states, wherein the unified TCI state is associated with synchronization signal blocks (SSBs) associated with a physical cell identifier (ID) identifying one of candidate target cells, and the serving cell change command indicates to apply the target cell that is the one of the candidate target cells. ### Claim 3 (depends on 2) The UE of claim 2, wherein the DCI is a DCI with format 1_1 or 1_2 including a new field indicating the serving cell change command, or a DCI with format 1_1 or 1_2 without downlink (DL) DL assignment including a reserved field indicating the serving cell change command. ### Claim 4 (depends on 1) The UE of claim 1, wherein the MAC CE activates one unified transmission configuration indicator (TCI) state, wherein the one unified TCI state is associated with synchronization signal blocks (SSBs) associated with a physical cell identifier (ID) identifying one of candidate target cells, and the serving cell change command indicates to apply the target cell that is the one of the candidate target cells. ### Claim 5 (depends on 1) The UE of claim 1, wherein the DCI indicates a physical cell ID indicating one of candidate target cells, as the serving cell change command, and the serving cell change command indicates to apply the target cell that is the one of the candidate target cells. ### Claim 6 (depends on 5) The UE of claim 5, wherein the DCI is a dedicated DCI format or a DCI format 1_1 or 1_2 scrambled by a dedicated radio network temporary identifier (RNTI). ### Claim 7 (depends on 1) The UE of claim 1, wherein the at least one processor is configured to cause the UE to apply the target cell starting from a first slot that is at least x symbols after the last symbol of physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) carrying the HARQ-ACK information for the DCI, wherein x is reported by a UE capability reporting per subcarrier spacing (SCS). ### Claim 8 (depends on 2) The UE of claim 2, wherein the at least one processor is configured to cause the UE to receive all physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH) P-DSC-H by the unified TCI state, starting from a first slot that is at least x symbols after the last symbol of physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) carrying the HARQ-ACK information for the DCI, wherein x is reported by a UE capability reporting per subcarrier spacing (SCS). ### Claim 9 (depends on 1) The UE of claim 1, wherein the at least one processor is configured to cause the UE to: receive a channel state information (CSI) report configuration; and transmit a beam report including one or more beam index or indices with a measured layer 1 (L1)-reference signal received power (RSRP), where each of the one or more beam index or indices identifies a beam from a different cell whose average L1-RSRP of top K beams is larger than a configured threshold, wherein the beam report also includes the average L1-RSRP of the top K beams for each cell for which a beam index of a beam is included in the beam report, wherein, K is a preconfigured value. ### Claim 10 (depends on 1) The UE of claim 1, wherein the DCI or the MAC CE further indicates a TAG identifier (ID). ### Claim 11 (depends on 2) The UE of claim 2, wherein the unified TCI state or the physical cell ID identifying the target cell is associated with a TAG ID. ### Claim 12 (depends on 4) The UE of claim 4, wherein the unified TCI state or the physical cell ID identifying the target cell is associated with a TAG ID. ### Claim 13 A method performed at a user equipment (UE), the method comprising: receiving a downlink control information (DCI) or a medium access control (MAC) control element (CE) indicating a serving cell change command for a target cell; and applying the target cell as a new serving cell after sending hybrid automatic repeat request acknowledgment (HARQ-ACK) information for the DCI or the MAC CE. ### Claim 14 A base station, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the base station to: transmit a downlink control information (DCI) DCI or a medium access control (MAC) control element (CE) MAC-CE indicating a serving cell change command for a target cell; and apply the target cell as a new serving cell after receiving hybrid automatic repeat request acknowledgment (HARQ-ACK) information for the DCI or the MAC CE. ### Claim 15 A processor for wireless communication, comprising: at least one controller coupled with at least one memory and configured to cause the processor to: receive a downlink control information (DCI) or a medium access control (MAC) control element (CE) indicating a serving cell change command for a target cell; and apply the target cell as the new serving cell after sending hybrid automatic repeat request acknowledgment (HARQ-ACK) information for the DCI or the MAC CE. ### Claim 16 (depends on 15) The processor of claim 15, wherein: the DCI indicates a unified transmission configuration indicator (TCI) state from activated two or more TCI states, wherein the unified TCI state is associated with synchronization signal blocks (SSBs) associated with a physical cell identifier (ID) identifying one of candidate target cells, and the serving cell change command indicates to apply the target cell that is the one of the candidate target cells. ### Claim 17 (depends on 16) The processor of claim 16, wherein the DCI is a DCI with format 1_1 or 1_2 including a new field indicating the serving cell change command, or a DCI with format 1_1 or 1_2 without downlink (DL) assignment including a reserved field indicating the serving cell change command. ### Claim 18 (depends on 15) The processor of claim 15, wherein: the MAC CE activates one unified transmission configuration indicator (TCI) state, wherein the one unified TCI state is associated with synchronization signal blocks (SSBs) associated with a physical cell identifier (ID) identifying one of candidate target cells, and the serving cell change command indicates to apply the target cell that is the one of the candidate target cells. ### Claim 19 (depends on 15) The processor of claim 15, wherein: the DCI indicates a physical cell ID indicating one of candidate target cells, as the serving cell change command, and the serving cell change command indicates to apply the target cell that is the one of the candidate target cells. ### Claim 20 (depends on 19) The processor of claim 19, wherein the DCI is a dedicated DCI format or a DCI format 1_1 or 1_2 scrambled by a dedicated radio network temporary identifier (RNTI).