Transmission configuration indicator activation using transmission configuration indicator lists for beam management and triggered mobility

Abstract

Transmission configuration indicator activation using same or separate indicator lists for beam management and network layered triggered mobility is provided. A method for transmission configuration indicator activation may include obtaining transmission configuration indicator state information for a user device indicating a configuration for layer 1 / layer 2 triggered mobility is the same or different from a configuration for beam management. The method may also include transmitting an indicator of the transmission configuration indicator state information to a candidate distributed device for changing a serving cell, and generating and transmitting, to the user device, a configuration message including at least the configurations of transmission configuration indicator state configuration for layer 1 / layer 2 triggered mobility and for beam management.

Description

TRANSMISSION CONFIGURATION INDICATOR ACTIVATION USING TRANSMISSION CONFIGURATION INDICATOR LISTS FOR BEAM MANAGEMENT AND TRIGGERED MOBILITYTECHNICAL FIELD:

[0001] Some example embodiments may generally relate to mobile or wireless telecommunication systems, such as Long Term Evolution (LTE) or fifth generation (5G) new radio (NR) access technology, or 5G beyond, or other communications systems. For example, certain example embodiments may relate to transmission configuration indicator (TCI) activation using TCI lists for beam management (BM) and Layer 1 / Layer 2 triggered mobility (LTM).BACKGROUND:

[0002] Examples of mobile or wireless telecommunication systems may include the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN), Long Term Evolution (LTE) Evolved UTRAN (E-UTRAN), LTE-Advanced (LTE-A), MulteFire, LTE-A Pro, fifth generation (5G) radio access technology or new radio (NR) access technology, and / or sixth generation (6G) radio access technology. 5G and 6G wireless systems refer to the next generation (NG) of radio systems and network architecture. 5G and 6G network technology are mostly based on new radio (NR) technology, but the 5G (or NG) network can also build on E- UTRAN radio. It is estimated that NR may provide bitrates on the order of 10- 20 Gbit / s or higher and may support at least enhanced mobile broadband (eMBB) and ultra-reliable low-latency communication (URLLC) as well as massive machine-type communication (mMTC). NR is expected to deliver extreme broadband and ultra-robust, low-latency connectivity and massive networking to support the Internet of Things (loT).SUMMARY:

[0003] Various exemplary embodiments may provide an apparatus including at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to obtain transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management. The apparatus may also be caused to transmit an indicator of the transmission configuration indicator state information to a candidate distributed device, and generate and transmit, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

[0004] Certain exemplary embodiments may provide an apparatus including at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to receive, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management. The apparatus may also be caused to transmit, to the centralized device, a response message comprising a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management, and determine, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

[0005] Some exemplary embodiments may provide an apparatus including at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to provide, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one ormore candidate cells. The apparatus may also be caused to receive, from the network entity, a configuration message comprising at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells, and determine, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

[0006] Certain exemplary embodiments may provide a method including obtaining transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management, and transmitting an indicator of the transmission configuration indicator state information to a candidate distributed device. The method may also include generating and transmitting, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

[0007] Various exemplary embodiments may provide a method including receiving, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management. The method may also include transmitting, to the centralized device, a response message comprising a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management, and determining, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

[0008] Some exemplary embodiments may provide a method including providing, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells. The method may also includereceiving, from the network entity, a configuration message comprising at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells, and determining, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

[0009] Various exemplary embodiments may provide an apparatus including means for obtaining transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management, and means for transmitting an indicator of the transmission configuration indicator state information to a candidate distributed device. The apparatus may also include means for generating and transmitting, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

[0010] Some exemplary embodiments may provide an apparatus including means for receiving, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management. The apparatus may also include means for transmitting, to the centralized device, a response message comprising a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management, and means for determining, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

[0011] Certain exemplary embodiments may provide an apparatus including means for providing, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and forbeam management for one or more candidate cells. The apparatus may also include means for receiving, from the network entity, a configuration message comprising at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells, and means for determining, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

[0012] Certain exemplary embodiments may provide a non-transitory computer readable medium including program instructions that, when executed by an apparatus, cause the apparatus at least to obtain transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management. The apparatus may also be caused to transmit an indicator of the transmission configuration indicator state information to a candidate distributed device, and generate and transmit, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

[0013] Various exemplary embodiments may provide a non-transitory computer readable medium including program instructions that, when executed by an apparatus, cause the apparatus at least to receive, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management. The apparatus may also be caused to transmit, to the centralized device, a response message comprising a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management, and determine, after a serving cell switch has been completed, one or more activetransmission configuration indicator states for beam management.

[0014] Some exemplary embodiments may provide a non-transitory computer readable medium including program instructions that, when executed by an apparatus, cause the apparatus at least to provide, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells. The apparatus may also be caused to receive, from the network entity, a configuration message comprising at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells, and determine, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

[0015] Certain exemplary embodiments may provide one or more computer programs including instructions stored thereon for performing one or more of the methods described herein. Some exemplary embodiments may also provide one or more apparatuses including one or more circuitry configured to perform one or more of the methods described herein.BRIEF DESCRIPTION OF THE DRAWINGS:

[0016] For proper understanding of example embodiments, reference should be made to the accompanying drawings, as follows:

[0017] FIG. 1 A illustrates an example of a signal flow diagram for one or more LTM procedures;

[0018] FIG. IB illustrates an example of a continuation of the signal flow diagram of FIG. 1 A;

[0019] FIG. 2 illustrates an example of radio resource control (RRC) parameters;

[0020] FIG. 3 illustrates an example of RRC parameters TCI states;

[0021] FIG. 4A illustrates an example of a signal flow diagram, according tovarious exemplary embodiments;

[0022] FIG. 4B illustrates an example of a continuation of the signal flow diagram of FIG. 4 A, according to various exemplary embodiments;

[0023] FIG. 5 illustrates an example of a flow diagram of a method, according to certain exemplary embodiments;

[0024] FIG. 6 illustrates an example of a flow diagram of another method, according to some exemplary embodiments;

[0025] FIG. 7 illustrates an example of a flow diagram of a further method, according to certain exemplary embodiments; and

[0026] FIG. 8 illustrates a set of apparatuses, according to various exemplary embodiments.DETAILED DESCRIPTION:

[0027] It will be readily understood that the components of certain example embodiments, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. The following is a detailed description of some exemplary embodiments of systems, methods, apparatuses, and non-transitory computer program products for transmission configuration indicator (TCI) activation using same or separate TCI lists for beam management (BM) and Layer 1 (Ll) / Layer 2 (L2) triggered mobility (LTM). Although the devices discussed below and shown in the figures refer to 6G / 5G or Next Generation NodeB (gNB) devices and UE devices, this disclosure is not limited to only gNBs and UEs.

[0028] It may be readily understood that the components of certain example embodiments, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Different reference designations from multiple figures may be used out of sequence in the description, to refer to a same element to illustrate their features or functions. If desired, the different functions or proceduresdiscussed herein may be performed in a different order and / or concurrently with each other. Furthermore, if desired, one or more of the described functions or procedures may be optional or may be combined. As such, the following description should be considered as illustrative of the principles and teachings of certain example embodiments, and not in limitation thereof.

[0029] 3rdGeneration Partnership Project (3 GPP) may provide specifications to define Layer 1 (LI) and Layer 2 (L2) based inter-cell mobility, which may be referred to as L1 / L2 triggered mobility (LTM). Lower layer mobility and L1 / L2 triggered mobility may be used interchangeably herein. An LTM procedure may provide, for example, four phases including a preparation phase, an early downlink (DL) and / or uplink (UL) synchronization phase, an execution phase, and a completion phase. In the preparation phase, a serving centralized unit (CU) may identify potential target cells based on Layer 3 (L3) measurement reports, prepare the target cells and share / provide target cell configurations with a UE. In the UL / DL synchronization phase, a serving distributed unit (DU) may request or inquire the UE to perform timing advance (TA) acquisition for a specific target cell for UL synchronization using, for example, LI measurements. The DU may also trigger TCI activation for early DL synchronization and time tracking with one or more beams of a candidate target cell.

[0030] In the execution phase, the serving DU may determine or select, based on the LI measurements, the target cell and may request that the UE to switch to the selected target cell using a cell switch command. The cell switch command may include, for example, the beam indication (TCI state ID) of the target cell and the TA to be used to access the target cell. The UE may then switch to the target cell and may start receiving data on the target cell. In the completion phase, a UE context may be released from the prepared cells or the UE context may not be related and instead may be used for dynamic switching. The CU may determine for how long the UE context may bemaintained.

[0031] FIGs. 1 A and IB illustrate signal flow diagrams for one or more LTM procedures. The LTM procedures may be performed by a configuration of a UE 101, a source DU 102, a target DU 103, and a CU 104. Procedures 110- 121 may be a preparation phase. At 110, the UE 101 may provide an L3 measurement report to the source DU 102, and at 111 , the source DU 102 may transfer, to the CU 104, aUL radio resource control (RRC) message including the L3 measurement report. At 112, the CU 104 may perform an LTM candidate preparation procedure, and at 113, the CU 104 may provide a UE content setup request to the target DU 103. At 114, the target DU 103 may provide a UE context setup response message to the CU 104, and at 115, the CU 104 may provide a UE context modification request to the source DU 102.

[0032] The UE context modification request may include one or more information elements (IES) to provide information about TCI states to be used in LTM, which may trigger MAC CE. The following Table 1 may provide examples of IEs for the UE context modification request.TABLE 1

[0033] At 116, the source DU 102 may provide a UE context modification response message to the CU 104, and at 117, the CU 104 may generate an RRC reconfiguration based on, for example, a measurement configuration of LI cell change and a configuration of prepared cells. At 118, the CU 104 may transfer a DL RRC message to the source DU 102, and at 119, the source DU102 may provide an RRC reconfiguration message to the UE 101. At 120, the UE 101 may provide an RRC reconfiguration complete message to the source DU 102, and at 121, the source DU 102 may transfer a UL RRC message to the CU 104.

[0034] Procedures 122-126 may be an early synchronization phase. At 122, the UE 101, the source DU 102, the target DU 103, and the CU 104 may perform DL synchronization with candidate cells, and at 123, the target DU103 may provide a physical downlink control channel (PDCCH) order to theUE 101. At 124, the UE 101 may provide a random access channel (RACH) to the target DU 103, and at 125, the target DU 103 may provide a TA for the UE 101 to the CU 104, which, at 126, may respond to the source DU 102 with the TA for the UE 101.

[0035] Procedures 127-134 may be an execution phase. At 127, the UE 101 may provide an LI measurement report to the source DU 102, and at 128, the source DU 102 may decide to perform a serving cell change. At 129, the source DU 102 may optionally provide a medium access control (MAC) control element (CE) TCI state activation message to the UE 101, and at 130, the source UE 102 may provide a MAC CE trigger cell change message to the UE 101. The MAC CE trigger cell change message may include a TA for the target cell. At 131, the UE 101 and the target DU 103 may perform a random access procedure, if needed, and at 132, the UE 101 may provide an RRC reconfiguration complete message to the target DU 103. At 133, the target DU 103 may transfer a UL RRC message to the CU 104, and at 134, the target DU 103 may provide an access notification to the CU 104. At 135, the CU 104 may provide a UE content release command message to the source DU102, and at 136, the source DU 102 may provide a UE context release complete message to the CU 104. At 137, the source DU 102, the target DU103, and the CU 104 may perform a path switch.

[0036] For intra-cell and / or inter-cell beam management (BM), each cell may provide a list of joint / DL TCI states and a list of UL TCI states, when TCI states are separately used for DL and UL for each bandwidth part (BWP). FIG. 2 illustrates an example of RRC parameters used to provide the list of DL TCI states and / or list of UL TCI states for intra-cell and / or inter-cell BM.

[0037] A unified TCI state framework may be used in LTM. An LTM cell switch command may indicate a TCI state of the target cell for the UE. A TCI state activation for LTM candidate cells may be performed before receiving the actual cell switch at the UE. The TCI state activation may be performedfor one or more TCI states associated with one or more candidate cells using a MAC CE command, which may be referred to as a candidate cell TCI states activation / deactivation MAC CE. Early TCI activation may support for triggering the UE to start fine DL time / frequency synchronization with the given TCI state of the candidate cell. This may be used to prepare the UE for LTM cell switch and may enable shorter interruption at cell switch, which may not necessarily need to involve time tracking for the target TCI state. Cell switch may occur within a short time frame after the early candidate cell TCI state activation and the network may only perform early activation for the candidate cell which may be a target cell.

[0038] When the early TCI activation is performed, the cell switch command may include, for example, one of the activated TCI states as the indicated TCI state associated with the target cell which the UE may use to transmit or receive DL / UL channels / signals from the target cell. If TCI activation is not performed before the cell switch, the cell switch command may activate and indicate the target TCI state. In order to enable TCI activation and indication for LTM, each candidate cell / DU may provide a list of TCI states to the serving cell / DU via the CU. The list of TCI states, which may be referred to as a candidate TCI state list or an LTM TCI state list, for each candidate cell may be provided to the UE in LTM configuration within each candidate cell configuration outside of the ServignCellConfig of the candidate cell configuration.

[0039] FIG. 3 illustrates an example of RRC parameters used to provide the joint / DL TCI states and / or UL TCI states for LTM. The UE may decode the list of TCI states when the RRC reconfiguration, which may include the LTM configuration, is received by the UE before the cell switch command is received. When early TCI activation is performed, and the UE has more than one active TCI state other than the indicated TCI state in the cell switch command at the time of cell switch, the UE may be configured to retain theactive TCI states after the cell switch. The active TCI states may be used for subsequent LTM and / or target cell BM.

[0040] For performing LTM cell switch, the UE may be configured with one or more active TCI states and at least one of the TCI states may be indicated in the LTM cell switch command for the cell switch. The UE may use the indicated TCI state for transmission of at least uplink message, such as an RRC reconfiguration complete message. The TCI states used for LTM cell switch may be referred as candidate or LTM TCI states. For a cell, the UE may use two separate lists of TCI States, such as a candidate / LTM TCI state list and a BM TCI state list.

[0041] Various exemplary embodiments may provide technological advantages to implement one or more procedures to enable the use of TCI states that are configured separately for LTM and BM in separate lists. Some exemplary embodiments may provide for addressing a situation in which the use or management of LTM TCI states for target cell may not be possible or desired due to processing and / or memory complexities. There may be a need to define signaling and actions for the UE and network elements, such as, for example, DUs providing the one or more LTM candidates cells to avoid ambiguity on the activated TCI states after the cell switch for LTM and / or for BM on the target cell.

[0042] Certain exemplary embodiments may provide a network entity (NW) that can configure the UE to use indicated TCI states for only LTM TCI states or both LTM and BM TCI states. The UE may indicate whether the UE supports the same configuration of LTM TCI state list and BM TCI state list, which may be associated with the BWP to be used for LTM, for a candidate cell. The same configuration may include, for example, a same TCI state ID, number of TCI states, and / or configuration parameters in terms of quasi colocation (QCL) information. Based on the capability of the UE, the CU may request that each candidate DU provide the list of LTM TCI states. Eachcandidate DU may provide the same configuration of LTM TCI states and BM TCI states or may provide different configurations for LTM and BM TCI states having different TCI state IDs, number of TCI states, and / or QCL information parameters.

[0043] Some exemplary embodiments may provide that, in the LTM configuration, a common configuration parameter, which may be an indication of the same or different configurations for TCI state configurations for LTM and BM, across all candidate cells or a separate configuration parameter, which may be an indication of the same or different configurations for TCI state configurations for LTM and BM, for each candidate cell may be indicated to the UE. When there is the same configuration of LTM TCI states and BM TCI states, after the cell switch, one or more LTM TCI states of the target cell may be mapped to the BM TCI states using the TCI state IDs, which may be ready for BM TCI activation and / or indication. When there are different configurations for LTM and BM TCI states, the UE may assume that the one or more LTM TCI states cannot be mapped to the BM TCI states. An indicated LTM beam may be used until a new BM TCI activation and indication is received by the UE and other active LTM TCI states, if any, of the target cell are assumed deactivated at least for BM.

[0044] Various exemplary embodiments may provide one or more procedures to be performed by a UE. The UE may indicate in a message, such as, for example, in an RRC message, whether the UE supports the same or separate / different configurations of TCI states for LTM and BM. When the UE has not indicated the support for, or does not support, the same configuration of TCI states for LTM and BM or indicated the support of different configurations of TCI states for LTM and BM, the UE may determine that after the cell switch the UE may not assume any TCI states for BM to be activated based on LTM TCI state activation, upon the UE receiving the LTM configuration indicating the TCI state lists for BM and LTM for a specific cell.In addition, or as an alternative, the UE may consider the LTM TCI states to be activated and / or activation is retained. In addition, for LTM purpose, the UE may determine the activated TCI states to be activated after the cell switch. Alternatively, the UE may determine the activated TCI states to be deactivated after the cell switch for LTM purpose.

[0045] Some exemplary embodiments may provide that the UE has indicated the support, or if the UE does support, the same configuration of TCI states for LTM and BM. In an example, the UE may indicate the support in various forms e.g., not indicating the support (e.g., not providing information that the UE supports same TCI lists to network) may indicate that UE does not support same TCI state list. In another example, the UE may indicate the support of same or different lists for LTM and BM. Upon receiving the LTM configuration indicating the same TCI state lists for BM and LTM for a specific cell, the UE may determine that, after the cell switch, one or more activated TCI states for LTM, such as prior to cell switch, may be the activated TCI states for BM (e.g., if the UE has indicated support for the same lists). In addition, for LTM purpose, the UE may determine that the activated TCI states to be activated after the cell switch. Alternatively, the UE may determine that the activated TCI states to be deactivated after the cell switch for LTM purpose.

[0046] Certain exemplary embodiments may provide one or more procedures to be performed by a network entity, such as a CU. The CU may receive an indication of whether a UE supports the same or a separate configuration of LTM and BM TCI state lists. For example, the indication may be received as part of a UE capability container. Some exemplary embodiments may provide that, based on the UE capability, the CU may request another network entity, such as a DU, which hosts the target cells, to provide the LTM TCI states accordingly. The same configuration of LTM TCI states and BM TCI states or different configurations for LTM and BM TCI states may be provided.Various exemplary embodiments may provide a common configuration parameter across all candidate cells or a separate configuration parameter for each candidate cell.

[0047] Various exemplary embodiments may provide one or more procedures to be performed by another network entity, such as a DU. The DU, such as, for example, a candidate DU, may receive the capability of the UE via the CU. Based on the capability of the UE, the DU may provide the LTM TCI states lists for LTM and BM. For example, if the UE supports the same configuration, the DU may confirm that the LTM TCI states list and BM TCI states lists belong to same list, such as, for example, candidate TCI state ID 1 is for LTM = TCI state ID 1 is for BM. Similarly, if the UE does not support the same configuration, the DU may provide LTM TCI state list differently from BM TCI state list, such as, for example, candidate TCI state ID 1 for LTM =! TCI state ID 1 for BM.

[0048] Certain exemplary embodiments may provide that the DU may receive information (e.g., TCI state IDs) for activated TCI states for LTM and / or an indication of the indicated TCI state for cell switch. For the switched UE, when the DU has received the indication of support for the same TCI states lists for LTM and BM and / or when the DU provides the same configuration of TCI states for LTM and BM, the DU may determine that the UE has activated the TCI states for BM based on the LTM TCI state activation after the cell switch is completed. In addition, for LTM purpose, the DU may determine the activated TCI states to be activated after the cell switch. Alternatively, the DU may determine the activated TCI states to be deactivated after the cell switch for LTM purpose.

[0049] Some exemplary embodiments may provide that the DU may receive the configuration for activated TCI states for LTM and / or the indication of the indicated TCI state for cell switch. For the switched UE, when the DU has received no indication for support of the same TCI state list for LTM and BMor the indication that the UE supports separate TCI state lists and / or when the DU provides the different configuration of TCI states for LTM and BM, the DU may determine that the UE has not activated the TCI states for BM based on the LTM TCI state activation after the cell switch is completed. The DU may determine that the UE has one activated and indicated TCI state for BM that may be the indicated TCI state in the cell switch command. In addition, for LTM purpose, the DU may determine the activated TCI states to be activated after the cell switch. Alternatively, the DU may determine the activated TCI states to be deactivated after the cell switch for LTM purpose.

[0050] Some exemplary embodiments may provide that the same TCI state configuration may provide that the TCI state list for LTM and BM for the specific cell may be the same for at least a TCI state ID, a number of TCI states in the TCI state list, and / or reference signals and QCL information included in the TCI state list.

[0051] EIGs. 4A and 4B illustrate an example of signal flow diagrams for a method for management of LTM and BM TCI states, according to various exemplary embodiments. The UE may indicate a capability of supporting the same configuration for LTM and BM TCI states. Based on this indication from the UE, LTM TCI states may be prepared and provided to the UE and then active LTM TCI states may be mapped to active BM TCI states after the cell switch.

[0052] Certain exemplary embodiments may provide that the method includes, at 410, assume that a UE 401 is connected to a source DU 402. The UE may indicate that the UE has capabilities for the same configuration for LTM and BM TCI states. At 411, the UE 401 may provide a measurement report to the source DU 402 and a CU 403, and at 412, the CU 403 may perform a handover (HO) decision. At 413, the CU 403 may provide a UE context setup request to one or more candidate target DUs, such as a candidate target DU 404. The UE context setup request may include, for example, a flag or other indicationthat the same configuration for LTM and BM TCI states. At 414, the candidate target DU 404 may provide a UE context setup response message to the CU 403. The UE context setup response message may include an LTM configuration and LTM TCI states with the same configuration in BM.

[0053] At 415, the CU 403 may provide a UE context modification request to the source DU 402, and at 416, the source DU 402 may respond to the request with a UE context modification response message. At 417, the CU 403 may generate an RRC reconfiguration of LTM preparations. The RRC reconfiguration may include a flag or indication that the same configuration for LTM and BM TCI states. At 418, the CU 403 may provide the generated RRC reconfiguration to the source DU 402 and / or the UE 401, and at 419, the UE 401 may provide an RRC reconfiguration complete message to the source DU 402 and / or the CU 403. At 420, the UE 401 may provide an LI measurement report to the source DU 402, and at 421, the source DU 402 may respond with a MAC CE TCI activation for LTM TCI states (e.g., TCI states 1-3) of the candidate target DU 404. At 422, the UE 401 may activate TCI states (e.g., TCI states 1-2), and at 423, early TA acquisition may be performed among one or more of the UE 401, the source DU 402, CU 403, and / or candidate target DU 404.

[0054] At 424, the UE 401 may provide an LI measurement report to the source DU 402, and at 425, the source DU 402 may decide to perform a serving cell change, such as, for example, to select cell 2 and TCI state 2. At 426, the source DU 402 may provide a MAC CE cell switch command to the UE 401. The MAC CE cell switch command may include, for example, an indication of the TCI state 2, cell 2, and a TA. At 427, the source DU 402 may provide active LTM TCI states and the indicated TCI state for a cell (e.g., cell 2) to the candidate target DU 404. At 428, the UE 401 may provide an RRC reconfiguration complete message to the candidate target DU 404, and at 429, the cell switch may be completed, and the UE 401 may be connectedto the candidate target DU 404. At 430, the UE 401 may activate LTM TCI states of the cell (e.g., cell 2) for BM, and at 431, the candidate target DU 404 may activate LTM TCI states of the cell (e.g., cell 2) for BM.

[0055] In certain exemplary embodiments in which the UE indicates no capability for supporting the same configuration of LTM and BM or the UE indicates a capability of supporting different configuration of LTM and BM, similar procedures as shown in FIG. 4 may be applied. An NW, such as a CU and / or DU, may consider and configure either the same configuration or a different configuration of LTM and BM TCI states, and may indicate accordingly to the UE. Based on the configuration, the UE and the target DU may determine whether the active LTM TCI state may be considered as active BM TCI states or not. As an example, if the UE has not indicated the support (or if the UE does not support same configuration of TCI states for LTM and BM), upon receiving the LTM configuration indicating the TCI state lists for BM and LTM for a specific cell, the UE and / or the target DU may determine that after the cell switch the UE and / or the target DU may not assume any TCI states for BM to be activated based on LTM TCI state activation.

[0056] FIG. 5 illustrates an example flow diagram of a method, according to certain exemplary embodiments. In an example embodiment, the method of FIG. 5 may be performed by an apparatus in a 3 GPP system, such as LTE, 5G-NR, or 6G. For instance, in an exemplary embodiment, the method of FIG. 5 may be performed by a network entity, such as a CU, similar to apparatus 810 illustrated in FIG. 8.

[0057] According to various exemplary embodiments, the method of FIG. 5 may include, at 510, obtaining transmission configuration indicator state information for a UE indicating a configuration for lower layer mobility is the same or different from a configuration for beam management, and at 520, transmitting an indicator of the transmission configuration indicator state information to a candidate distributed device. The method may also include,at 530, generating and transmitting, to the UE, a configuration message including at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

[0058] Certain exemplary embodiments may provide that the transmission configuration indicator state information indicates whether the configuration for lower layer mobility is the same or different from the configuration for beam management. The configuration message may include an indication whether the configuration for transmission configuration indicator state configurations for lower layer mobility and for beam management for a candidate cell is same or different. The indicator of the transmission configuration indicator state information may be sent in a context setup request message.

[0059] FIG. 6 illustrates an example flow diagram of a method, according to certain exemplary embodiments. In an example embodiment, the method of FIG. 6 may be performed by an apparatus in a 3 GPP system, such as LTE, 5G-NR, or 6G. For instance, in an exemplary embodiment, the method of FIG. 6 may be performed by a network entity, such as a candidate target DU, similar to apparatus 820 illustrated in FIG. 8.

[0060] According to various exemplary embodiments, the method of FIG. 6 may include, at 610, receiving, from a CU, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management. The method may also include, at 620, transmitting, to the CU, a response message including a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management, and at 630, determining, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

[0061] Certain exemplary embodiments may provide that the list of states oftransmission configuration indicators includes a list of transmission configuration indicators for beam management and a list of transmission configuration indicators for lower layer mobility. Some exemplary embodiments may provide that the method further includes receiving capability information of the user device via a centralized device. The capability information may include an indicator that a transmission configuration indicator state configuration for lower layer mobility is the same or different from a configuration for beam management. Various exemplary embodiments may provide that the method further includes receiving at least one configuration for activated transmission configuration indicator states for lower layer mobility and / or an indication of an indicated state of the transmission configuration indicator for serving cell switching.

[0062] Various exemplary embodiments may provide that the method further includes, when the transmission configuration indicator state configurations for lower layer mobility and for beam management are the same, after cell switch has been completed, determining that the at least one received activated transmission configuration indicator state for lower layer mobility is active for beam management for a target cell. Certain exemplary embodiments may provide that the method further includes, when the transmission configuration indicator state configurations for lower layer mobility and for beam management are different, after cell switch has been completed, determining there is no active transmission configuration indicator state for beam management for a target cell except the indicated transmission configuration indicator state provided in a cell switch command. Some exemplary embodiments may provide that the method further includes, after cell switch has been completed, determining that at least one activated transmission configuration indicator state for lower layer mobility is active for lower layer mobility. Various exemplary embodiments may also provide that the method further includes, after cell switch has been completed, determining that at leastone activated transmission configuration indicator state for lower layer mobility is not active for lower layer mobility. The configuration for lower layer mobility and the configuration for beam management may include one or more identifiers of transmission configuration indicators, a number of states of transmission configuration indicators in the list, and a reference signal for the transmission configuration indicators in the list.

[0063] FIG. 7 illustrates an example flow diagram of a method, according to certain exemplary embodiments. In an example embodiment, the method of FIG. 7 may be performed by an apparatus in a 3 GPP system, such as LTE, 5G-NR, or 6G. For instance, in an exemplary embodiment, the method of FIG. 7 may be performed by a user device, mobile device or the like, such as a UE, similar to apparatus 830 illustrated in FIG. 8.

[0064] According to various exemplary embodiments, the method of FIG. 7 may include, at 710, providing, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells. The method may also include, at 720, receiving, from the network entity, a configuration message including at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells. The method may further include, at 730, determining, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

[0065] Certain exemplary embodiments may provide that the capability includes support of the same configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells. The capability may include support for a different configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one ormore candidate cells. Some exemplary embodiments may provide that the method further includes, after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell. Various exemplary embodiments may provide that the method further includes, after cell switch to the target cell has been completed, determining that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

[0066] Various exemplary embodiments may provide that the method further includes, after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility. Certain exemplary embodiments may provide that the method further includes, after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility. The configuration message may include an indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells is the same or different. The indication may be common for all candidate cells. The indication may be for each of the one or more candidate cells.

[0067] Some exemplary embodiments may provide that the method further includes, when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is the same, after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell. Various exemplaryembodiments may provide that the method further includes, when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is different, after cell switch to the target cell has been completed, determining that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

[0068] Certain exemplary embodiments may provide that the method further includes, after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility. Various exemplary embodiments may provide that the method further includes, after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility. The same transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells may include the same configuration in terms of at least one of transmission configuration indicator state identities, a number of transmission configuration indicator states, or reference signals and quasi co-location information included in the transmission configuration indicator states. Some exemplary embodiments may provide that the method further includes responding to the configuration message by transmitting a configuration completion message.

[0069] FIG. 8 illustrates a set of apparatuses 810, 820, and 830 according to various exemplary embodiments. In the various exemplary embodiments, the apparatus 810 may be an element in a communications network or a network entity, such as a CU. For example, CU 403 according to various exemplary embodiments discussed above may be an example of apparatus 810. It should be noted that one of ordinary skill in the art would understand that apparatus810 may include components or features not shown in FIG. 8. Further, apparatus 820 may be an element in a communications network or a network entity, such as a DU. For example, target candidate DU 404 according to various exemplary embodiments discussed above may be examples of apparatus 820. It should be noted that one of ordinary skill in the art would understand that apparatus 820 may include components or features not shown in FIG. 8. In addition, apparatus 830 may be an element in a communications network or network entity, such as UE, RedCap UE, SL UE, mobile equipment (ME), mobile station, mobile device, stationary device, loT device, or other device. For example, UE 401 according to various exemplary embodiments discussed above may be an example of apparatus 830. It should be noted that one of ordinary skill in the art would understand that apparatus 830 may include components or features not shown in FIG. 8.

[0070] In some example embodiments, apparatuses 810, 820 and / or 830 may include one or more processors, one or more computer-readable storage medium (for example, memory, storage, or the like), one or more radio access components (for example, a modem, a transceiver, or the like), and / or a user interface. In some example embodiments, apparatuses 810, 820 and / or 830 may be configured to operate using one or more radio access technologies, such as GSM, LTE, LTE-A, NR, 5G, WLAN, WiFi, NB-IoT, Bluetooth, NFC, MulteFire, and / or any other radio access technologies.

[0071] As illustrated in the example of FIG. 8, apparatuses 810, 820 and / or 830 may include or be coupled to processors 812, 822, and 832, respectively, for processing information and executing instructions or operations. Processors 812, 822, and 832 may be any type of general or specific purpose processor. In fact, processors 812, 822, and 832 may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), and processors based on amulti-core processor architecture, as examples. While a single processor 812 (and 822 / 832) for each of apparatuses 810, 820 and / or 830 is shown in FIG. 5, multiple processors may be utilized according to other example embodiments. For example, it should be understood that, in certain example embodiments, apparatuses 810, 820 and / or 830 may include two or more processors that may form a multiprocessor system (for example, in this case processors 812, 822, and 832 may represent a multiprocessor) that may support multiprocessing. According to certain example embodiments, the multiprocessor system may be tightly coupled or loosely coupled to, for example, form a computer cluster).

[0072] Processors 812, 822, and 832 may perform functions associated with the operation of apparatuses 810, 820 and / or 830, respectively, including, as some examples, precoding of antenna gain / phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatuses 810, 820 and / or 830, including processes illustrated in FIGs. 4-7.

[0073] Apparatuses 810, 820 and / or 830 may further include or be coupled to memory 814, 824, and / or 834 (internal or external), respectively, which may be coupled to processors 812, 822, and 832, respectively, for storing information and instructions that may be executed by processors 812, 822, and 832. Memory 814 (and memory 824 and memory 834) may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and / or removable memory. For example, memory 814 (and memory 824 and memory 834) can be comprised of any combination of random access memory (RAM), read only memory (ROM), static storage such as a magnetic or optical disk, hard disk drive (HDD), or any other type of non-transitorymachine or computer readable media. The instructions stored in memory 814, memory 824 and memory 834 may include program instructions or computer program code that, when executed by processors 812, 822, and 832, enable the apparatuses 810, 820 and / or 830 to perform tasks as described herein.

[0074] In certain example embodiments, apparatuses 810, 820 and / or 830 may further include or be coupled to (internal or external) a drive or port that is configured to accept and read an external computer readable storage medium, such as an optical disc, USB drive, flash drive, or any other storage medium. For example, the external computer readable storage medium may store a computer program or software for execution by processors 812, 822, and 832 and / or apparatuses 810, 820 and / or 830 to perform any of the methods illustrated in FIGs. 4-7.

[0075] According to various exemplary embodiments, the apparatus 810 may include at least one processor 812, and at least one memory 814, as shown in FIG. 8. The memory 814 may store instructions that, when executed by the processor 812, cause the apparatus 810 to obtain transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management, and transmit an indicator of the transmission configuration indicator state information to a candidate distributed device. The apparatus 810 may further be caused to generate and transmit, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

[0076] According to various exemplary embodiments, the apparatus 820 may include at least one processor 822, and at least one memory 824, as shown in FIG. 8. The memory 824 may store instructions that, when executed by the processor 822, cause the apparatus 820 to receive, from a centralized device, an indicator of transmission configuration indicator state information of a 1configuration for lower layer mobility is the same or different from a configuration for beam management. The apparatus 820 may also be caused to transmit, to the centralized device, a response message including a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management. The apparatus 820 may further be caused to determine, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

[0077] According to various exemplary embodiments, the apparatus 830 may include at least one processor 832, and at least one memory 834, as shown in FIG. 8. The memory 834 may store instructions that, when executed by the processor 832, cause the apparatus 830 to provide, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells. The apparatus 830 may further be caused to receive, from the network entity, a configuration message including at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells. The apparatus 830 may also be caused to determine, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

[0078] In some exemplary embodiments, apparatuses 810, 820 and / or 830 may also include or be coupled to one or more antennas 815, 825, and 835 for receiving a downlink signal and for transmitting via an uplink from apparatuses 810, 820 and / or 830, respectively. Apparatuses 810, 820 and / or 830 may further include transceivers 816, 826, and 836, respectively, configured to transmit and receive information. The transceiver 816, 826, and 836 may also include a radio interface that may correspond to a plurality of radio access technologies including one or more of GSM, LTE, LTE-A, 5G,NR, WLAN, NB-IoT, Bluetooth, BT-LE, NFC, RFID, UWB, or the like. The radio interface may include other components, such as filters, converters (for example, digital-to-analog converters or the like), symbol demappers, signal shaping components, an Inverse Fast Fourier Transform (IFFT) module, or the like, to process symbols, such as OFDMA symbols, carried by a downlink or an uplink.

[0079] For instance, transceivers 816, 826, and 836 may be respectively configured to modulate information on to a carrier waveform for transmission and demodulate received information for further processing by other elements of apparatuses 810, 820 and / or 830. In other example embodiments, transceivers 816, 826, and 836 may be capable of transmitting and receiving signals or data directly. Additionally or alternatively, in some example embodiments, apparatuses 810, 820 and / or 830 may include an input and / or output device (I / O device). In certain example embodiments, apparatuses 810, 820 and / or 830 may further include a user interface, such as a graphical user interface or touchscreen.

[0080] In certain example embodiments, memory 814, 824, and 834 store software modules that provide functionality when executed by processors 812, 822, and 832, respectively. The modules may include, for example, an operating system that provides operating system functionality for apparatuses 810, 820 and / or 830. The memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatuses 810, 820 and / or 830. The components of apparatuses 810, 820 and / or 830 may be implemented in hardware, or as any suitable combination of hardware and software. According to certain example embodiments, apparatuses 810, 820 and / or 830 may optionally be configured to communicate with each other via a wireless or wired communications links 840, 850, and 860 according to any radio access technology, such as NR.

[0081] According to certain example embodiments, processors 812, 822and / or 832, and memory 814, 824 and / or 834 may be included in or may form apart of processing circuitry or control circuitry. In addition, in some example embodiments, transceivers 816, 826, and 836 may be included in or may form a part of transceiving circuitry.

[0082] In some exemplary embodiments, an apparatus (e.g., apparatuses 810, 820 and / or 830) may include means for performing a method, a process, or any of the variants discussed herein. Examples of the means may include one or more processors, memory, controllers, transmitters, receivers, and / or computer program code for causing the performance of the operations.

[0083] Certain exemplary embodiments may be directed to an apparatus 810 that includes means for obtaining transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management, and means for transmitting an indicator of the transmission configuration indicator state information to a candidate distributed device. The apparatus 810 may also include means for generating and transmitting, to the user device, a configuration message including at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

[0084] Some exemplary embodiments may be directed to an apparatus 820 that includes means for receiving, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management. The apparatus 820 may also include means for transmitting, to the centralized device, a response message including a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management. The apparatus 820 may further include means for determining, after a serving cell switch has been completed, one or more active transmission configuration indicator states forbeam management.

[0085] Various exemplary embodiments may be directed to an apparatus 830 that includes means for providing, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells. The apparatus 830 may also include means for receiving, from the network entity, a configuration message including at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells. The apparatus 830 may further include means for determining, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

[0086] As used herein, the term “circuitry” may refer to hardware-only circuitry implementations (for example, analog and / or digital circuitry), combinations of hardware circuits and software, combinations of analog and / or digital hardware circuits with software / firmware, any portions of hardware processor(s) with software, including digital signal processors, that work together to cause an apparatus (for example, apparatus 810, 820 and / or 830) to perform various functions, and / or hardware circuit(s) and / or processor(s), or portions thereof, that use software for operation but where the software may not be present when it is not needed for operation. As a further example, as used herein, the term “circuitry” may also cover an implementation of merely a hardware circuit or processor or multiple processors, or portion of a hardware circuit or processor, and the accompanying software and / or firmware. The term circuitry may also cover, for example, a baseband integrated circuit in a server, cellular network node or device, or other computing or network device.

[0087] A computer program product may include one or more computerexecutable components which, when the program is run, are configured tocarry out some example embodiments. The one or more computer-executable components may be at least one software code or portions of it. Modifications and configurations required for implementing functionality of certain example embodiments may be performed as routine(s), which may be implemented as added or updated software routine(s). Software routine(s) may be downloaded into the apparatus.

[0088] As an example, software or a computer program code or portions of it may be in a source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, distribution medium, or computer readable medium, which may be any entity or device capable of carrying the program. Such carriers may include a record medium, computer memory, read-only memory, photoelectrical and / or electrical carrier signal, telecommunications signal, and software distribution package, for example. Depending on the processing power needed, the computer program may be executed in a single electronic digital computer or it may be distributed amongst a number of computers. The computer readable medium or computer readable storage medium may be a non-transitory medium.

[0089] In other example embodiments, the functionality may be performed by hardware or circuitry included in an apparatus (for example, apparatuses 810, 820 and / or 830), for example through the use of an application specific integrated circuit (ASIC), a programmable gate array (PGA), a field programmable gate array (FPGA), or any other combination of hardware and software. In yet another example embodiment, the functionality may be implemented as a signal, a non-tangible means that can be carried by an electromagnetic signal downloaded from the Internet or other network.

[0090] According to certain example embodiments, an apparatus, such as a node, device, or a corresponding component, may be configured as circuitry, a computer or a microprocessor, such as single-chip computer element, or as a chipset, including at least a memory for providing storage capacity used forarithmetic operation and an operation processor for executing the arithmetic operation.

[0091] The features, structures, or characteristics of example embodiments described throughout this specification may be combined in any suitable manner in one or more example embodiments. For example, the usage of the phrases “certain embodiments,” “an example embodiment,” “some embodiments,” or other similar language, throughout this specification refers to the fact that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment. Thus, appearances of the phrases “in certain embodiments,” “an example embodiment,” “in some embodiments,” “in other embodiments,” or other similar language, throughout this specification do not necessarily refer to the same group of embodiments, and the described features, structures, or characteristics may be combined in any suitable manner in one or more example embodiments. Further, the terms “cell”, “node”, “gNB”, or other similar language throughout this specification may be used interchangeably.

[0092] As used herein, “at least one of the following: ” and “at least one of ” and similar wording, where the list of two or more elements are joined by “and” or “or,” mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.

[0093] One having ordinary skill in the art will readily understand that the disclosure as discussed above may be practiced with procedures in a different order, and / or with hardware elements in configurations which are different than those which are disclosed. Therefore, although the disclosure has been described based upon these example embodiments, it would be apparent to those of skill in the art that certain modifications, variations, and alternative constructions would be apparent, while remaining within the spirit and scope of example embodiments. Although the above embodiments refer to 6G, 5GNR and LTE technology, the above embodiments may also apply to any other present or future 3 GPP technology, such as LTE-advanced, and / or fourth generation (4G) technology.

[0094] Partial Glossary:

[0095] 3 GPP 3rd Generation Partnership Project

[0096] 5G 5th Generation

[0097] BM Beam Management

[0098] BWP Bandwidth Part

[0099] CU Centralized Unit

[0100] DL Downlink

[0101] DU Distributed Unit

[0102] EMBB Enhanced Mobile Broadband

[0103] gNB 5G or Next Generation NodeB

[0104] ID Identifier

[0105] LTE Long Term Evolution

[0106] LTM Layer 1 / Layer 2 Triggered Mobility

[0107] NR New Radio

[0108] QCL Quasi Co-Location

[0109] RAT Radio Access Technology

[0110] RRC Radio Resource Control

[0111] TCI Transmission Configuration Indicator

[0112] UE User Equipment

[0113] UL Uplink

Claims

WE CLAIM:

1. An apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: obtain transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management; transmit an indicator of the transmission configuration indicator state information to a candidate distributed device; and generate and transmit, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

2. The apparatus according to claim 1, wherein the transmission configuration indicator state information indicates whether the configuration for lower layer mobility is the same or different from the configuration for beam management.

3. The apparatus according to claim 1 or claim 2, wherein the configuration message comprises an indication whether the configuration for transmission configuration indicator state configurations for lower layer mobility and for beam management for a candidate cell is same or different.

4. The apparatus according to any one of claims 1 -3, wherein the indicator of the transmission configuration indicator state information is sent in a context setup request message.

5. An apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: receive, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management; transmit, to the centralized device, a response message comprising a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management; and determine, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

6. The apparatus according to claim 5, wherein the list of states of transmission configuration indicators comprises a list of transmission configuration indicators for beam management and a list of transmission configuration indicators for lower layer mobility.

7. The apparatus according to claim 5 or claim 6, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: receive capability information of the user device via a centralized device, wherein the capability information comprises an indicator that a transmission configuration indicator state configuration for lower layer mobility is the same or different from a configuration for beam management.

8. The apparatus according to any one of claims 5-7, wherein the stored instructions, when executed by the at least one processor, cause the apparatusat least to: receive at least one configuration for activated transmission configuration indicator states for lower layer mobility and / or an indication of an indicated state of the transmission configuration indicator for serving cell switching.

9. The apparatus according to claim 8, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: when the transmission configuration indicator state configurations for lower layer mobility and for beam management are the same, after cell switch has been completed, determine that the at least one received activated transmission configuration indicator state for lower layer mobility is active for beam management for a target cell.

10. The apparatus according to claim 8, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: when the transmission configuration indicator state configurations for lower layer mobility and for beam management are different, after cell switch has been completed, determine there is no active transmission configuration indicator state for beam management for a target cell except the indicated transmission configuration indicator state provided in a cell switch command.

11. The apparatus according to claim 9 or claim 10, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: after cell switch has been completed, determine that at least one activated transmission configuration indicator state for lower layer mobility is active for lower layer mobility.

12. The apparatus according to claim 9 or claim 10, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: after cell switch has been completed, determine that at least one activated transmission configuration indicator state for lower layer mobility is not active for lower layer mobility.

13. The apparatus according to any one of claims 5-12, wherein the configuration for lower layer mobility and the configuration for beam management comprise one or more identifiers of transmission configuration indicators, a number of states of transmission configuration indicators in the list, and a reference signal for the transmission configuration indicators in the list.

14. An apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: provide, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells; receive, from the network entity, a configuration message comprising at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells; and determine, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

15. The apparatus according to claim 14, wherein the capability comprises support of the same configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells.

16. The apparatus according to claim 14, wherein the capability comprises support for a different configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells.

17. The apparatus according to claim 15, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell.

18. The apparatus according to claim 16, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

19. The apparatus according to claim 17 or claim 18, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility.

20. The apparatus according to claim 17 or claim 18, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility.

21. The apparatus according to claim 14, wherein the configuration message comprises an indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells is the same or different.

22. The apparatus according to claim 21, wherein the indication is common for all candidate cells.

23. The apparatus according to claim 21, wherein the indication is for each of the one or more candidate cells.

24. The apparatus according to claim 21, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is the same, after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell.

25. The apparatus according to claim 21, wherein the stored instructions,when executed by the at least one processor, cause the apparatus at least to: when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is different, after cell switch to the target cell has been completed, determine that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

26. The apparatus according to claim 24 or claim 25, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility.

27. The apparatus according to claim 24 or claim 25, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility.

28. The apparatus according to any one of claims 14-27, wherein the same transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells comprise the same configuration in terms of at least one of: transmission configuration indicator state identities, a number of transmission configuration indicator states, or reference signals and quasi co-location information included in thetransmission configuration indicator states.

29. The apparatus according to any one of claims 14-28, wherein the stored instructions, when executed by the at least one processor, cause the apparatus at least to: respond to the configuration message by transmitting a configuration completion message.

30. A method, comprising: obtaining transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management; transmitting an indicator of the transmission configuration indicator state information to a candidate distributed device; and generating and transmitting, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

31. The method according to claim 30, wherein the transmission configuration indicator state information indicates whether the configuration for lower layer mobility is the same or different from the configuration for beam management.

32. The method according to claim 30 or claim 31, wherein the configuration message comprises an indication whether the configuration for transmission configuration indicator state configurations for lower layer mobility and for beam management for a candidate cell is same or different.

33. The method according to any one of claims 30-32, wherein the indicator of the transmission configuration indicator state information is sent in a context setup request message.

34. A method, comprising: receiving, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management; transmitting, to the centralized device, a response message comprising a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management; and determining, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

35. The method according to claim 34, wherein the list of states of transmission configuration indicators comprises a list of transmission configuration indicators for beam management and a list of transmission configuration indicators for lower layer mobility.

36. The method according to claim 34 or claim 35, further comprising: receiving capability information of the user device via a centralized device, wherein the capability information comprises an indicator that a transmission configuration indicator state configuration for lower layer mobility is the same or different from a configuration for beam management.

37. The method according to any one of claims 34-36, further comprising: receiving at least one configuration for activated transmission configuration indicator states for lower layer mobility and / or an indication ofan indicated state of the transmission configuration indicator for serving cell switching.

38. The method according to claim 37, further comprising: when the transmission configuration indicator state configurations for lower layer mobility and for beam management are the same, after cell switch has been completed, determining that the at least one received activated transmission configuration indicator state for lower layer mobility is active for beam management for a target cell.

39. The method according to claim 37, further comprising: when the transmission configuration indicator state configurations for lower layer mobility and for beam management are different, after cell switch has been completed, determining there is no active transmission configuration indicator state for beam management for a target cell except the indicated transmission configuration indicator state provided in a cell switch command.

40. The method according to claim 38 or claim 39, further comprising: after cell switch has been completed, determining that at least one activated transmission configuration indicator state for lower layer mobility is active for lower layer mobility.

41. The method according to claim 38 or claim 39, further comprising: after cell switch has been completed, determining that at least one activated transmission configuration indicator state for lower layer mobility is not active for lower layer mobility.

42. The method according to any one of claims 34-41, wherein the configuration for lower layer mobility and the configuration for beammanagement comprise one or more identifiers of transmission configuration indicators, a number of states of transmission configuration indicators in the list, and a reference signal for the transmission configuration indicators in the list.

43. A method, comprising: providing, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells; receiving, from the network entity, a configuration message comprising at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells; and determining, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

44. The method according to claim 43, wherein the capability comprises support of the same configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells.

45. The method according to claim 43, wherein the capability comprises support for a different configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells.

46. The method according to claim 44, further comprising: after cell switch to the target cell has been completed, determining thatat least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell.

47. The method according to claim 45, further comprising: after cell switch to the target cell has been completed, determining that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

48. The method according to claim 46 or claim 47, further comprising: after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility.

49. The method according to claim 46 or claim 47, further comprising: after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility.

50. The method according to claim 43, wherein the configuration message comprises an indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells is the same or different.

51. The method according to claim 50, wherein the indication is common for all candidate cells.

52. The method according to claim 50, wherein the indication is for each of the one or more candidate cells.

53. The method according to claim 50, further comprising: when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is the same, after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell.

54. The method according to claim 50, further comprising: when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is different, after cell switch to the target cell has been completed, determining that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

55. The method according to claim 53 or claim 54, further comprising: after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility.

56. The method according to claim 53 or claim 54, further comprising: after cell switch to the target cell has been completed, determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility.

57. The method according to any one of claims 43-56, wherein the same transmission configuration indicator state configurations for lower layermobility and for beam management for the one or more candidate cells comprise the same configuration in terms of at least one of transmission configuration indicator state identities, a number of transmission configuration indicator states, or reference signals and quasi co-location information included in the transmission configuration indicator states.

58. The method according to any one of claims 43-57, further comprising: responding to the configuration message by transmitting a configuration completion message.

59. An apparatus, comprising: means for obtaining transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management; means for transmitting an indicator of the transmission configuration indicator state information to a candidate distributed device; and means for generating and transmitting, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

60. The method according to claim 59, wherein the transmission configuration indicator state information indicates whether the configuration for lower layer mobility is the same or different from the configuration for beam management.

61. The method according to claim 59 or claim 60, wherein the configuration message comprises an indication whether the configuration fortransmission configuration indicator state configurations for lower layer mobility and for beam management for a candidate cell is same or different.

62. The method according to any one of claims 59-61, wherein the indicator of the transmission configuration indicator state information is sent in a context setup request message.

63. An apparatus, comprising: means for receiving, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management; means for transmitting, to the centralized device, a response message comprising a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management; and means for determining, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

64. The apparatus according to claim 63, wherein the list of states of transmission configuration indicators comprises a list of transmission configuration indicators for beam management and a list of transmission configuration indicators for lower layer mobility.

65. The apparatus according to claim 63 or claim 64, further comprising: means for receiving capability information of the user device via a centralized device, wherein the capability information comprises an indicator that a transmission configuration indicator state configuration for lower layermobility is the same or different from a configuration for beam management.

66. The apparatus according to any one of claims 63-65, further comprising: means for receiving at least one configuration for activated transmission configuration indicator states for lower layer mobility and / or an indication of an indicated state of the transmission configuration indicator for serving cell switching.

67. The apparatus according to claim 66, further comprising: when the transmission configuration indicator state configurations for lower layer mobility and for beam management are the same, after cell switch has been completed, means for determining that the at least one received activated transmission configuration indicator state for lower layer mobility is active for beam management for a target cell.

68. The apparatus according to claim 66, further comprising: when the transmission configuration indicator state configurations for lower layer mobility and for beam management are different, after cell switch has been completed, means for determining there is no active transmission configuration indicator state for beam management for a target cell except the indicated transmission configuration indicator state provided in a cell switch command.

69. The apparatus according to claim 67 or claim 68, further comprising: after cell switch has been completed, means for determining that at least one activated transmission configuration indicator state for lower layer mobility is active for lower layer mobility.

70. The apparatus according to claim 67 or claim 68, further comprising: after cell switch has been completed, means for determining that at least one activated transmission configuration indicator state for lower layer mobility is not active for lower layer mobility.

71. The apparatus according to any one of claims 63-70, wherein the configuration for lower layer mobility and the configuration for beam management comprise one or more identifiers of transmission configuration indicators, a number of states of transmission configuration indicators in the list, and a reference signal for the transmission configuration indicators in the list.

72. An apparatus, comprising: means for providing, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells; means for receiving, from the network entity, a configuration message comprising at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells; and means for determining, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

73. The apparatus according to claim 72, wherein the capability comprises support of the same configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells.

74. The apparatus according to claim 72, wherein the capability comprises support for a different configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells.

75. The apparatus according to claim 73, further comprising: after cell switch to the target cell has been completed, means for determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell.

76. The apparatus according to claim 74, further comprising: after cell switch to the target cell has been completed, means for determining that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

77. The apparatus according to claim 75 or claim 76, further comprising: after cell switch to the target cell has been completed, means for determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility.

78. The apparatus according to claim 75 or claim 76, further comprising: after cell switch to the target cell has been completed, means for determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility.

79. The apparatus according to claim 72, wherein the configurationmessage comprises an indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells is the same or different.

80. The apparatus according to claim 79, wherein the indication is common for all candidate cells.

81. The apparatus according to claim 79, wherein the indication is for each of the one or more candidate cells.

82. The apparatus according to claim 79, further comprising: when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is the same, after cell switch to the target cell has been completed, means for determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell.

83. The apparatus according to claim 79, further comprising: when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is different, after cell switch to the target cell has been completed, determining that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

84. The apparatus according to claim 82 or claim 83, further comprising: after cell switch to the target cell has been completed, means for determining that at least one active transmission configuration indicator statefor the target cell for lower layer mobility is active for lower layer mobility.

85. The apparatus according to claim 82 or claim 83, further comprising: after cell switch to the target cell has been completed, means for determining that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility.

86. The apparatus according to any one of claims 72-85, wherein the same transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells comprise the same configuration in terms of at least one of: transmission configuration indicator state identities, a number of transmission configuration indicator states, or reference signals and quasi co-location information included in the transmission configuration indicator states.

87. The apparatus according to any one of claims 72-86, further comprising: means for responding to the configuration message by transmitting a configuration completion message.

88. A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus at least to: obtain transmission configuration indicator state information for a user device indicating a configuration for lower layer mobility is the same or different from a configuration for beam management; transmit an indicator of the transmission configuration indicator stateinformation to a candidate distributed device; and generate and transmit, to the user device, a configuration message comprising at least the configurations of transmission configuration indicator state configuration for lower layer mobility and for beam management.

89. The non-transitory computer readable medium according to claim 88, wherein the transmission configuration indicator state information indicates whether the configuration for lower layer mobility is the same or different from the configuration for beam management.

90. The non-transitory computer readable medium according to claim 88 or claim 89, wherein the configuration message comprises an indication whether the configuration for transmission configuration indicator state configurations for lower layer mobility and for beam management for a candidate cell is same or different.

91. The non-transitory computer readable medium according to any one of claims 88-90, wherein the indicator of the transmission configuration indicator state information is sent in a context setup request message.

92. A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus at least to: receive, from a centralized device, an indicator of transmission configuration indicator state information of a configuration for lower layer mobility is the same or different from a configuration for beam management; transmit, to the centralized device, a response message comprising a list of states of transmission configuration indicator states for lower layer mobility with the same or different configuration of beam management; anddetermine, after a serving cell switch has been completed, one or more active transmission configuration indicator states for beam management.

93. The non-transitory computer readable medium according to claim 92, wherein the list of states of transmission configuration indicators comprises a list of transmission configuration indicators for beam management and a list of transmission configuration indicators for lower layer mobility.

94. The non-transitory computer readable medium according to claim 92 or claim 93, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: receive capability information of the user device via a centralized device, wherein the capability information comprises an indicator that a transmission configuration indicator state configuration for lower layer mobility is the same or different from a configuration for beam management.

95. The non-transitory computer readable medium according to any one of claims 92-94, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: receive at least one configuration for activated transmission configuration indicator states for lower layer mobility and / or an indication of an indicated state of the transmission configuration indicator for serving cell switching.

96. The non-transitory computer readable medium according to claim 95, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: when the transmission configuration indicator state configurations for lower layer mobility and for beam management are the same, after cell switchhas been completed, determine that the at least one received activated transmission configuration indicator state for lower layer mobility is active for beam management for a target cell.

97. The non-transitory computer readable medium according to claim 95, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: when the transmission configuration indicator state configurations for lower layer mobility and for beam management are different, after cell switch has been completed, determine there is no active transmission configuration indicator state for beam management for a target cell except the indicated transmission configuration indicator state provided in a cell switch command.

98. The non-transitory computer readable medium according to claim 96 or claim 97, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: after cell switch has been completed, determine that at least one activated transmission configuration indicator state for lower layer mobility is active for lower layer mobility.

99. The non-transitory computer readable medium according to claim 96 or claim 97, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: after cell switch has been completed, determine that at least one activated transmission configuration indicator state for lower layer mobility is not active for lower layer mobility.

100. The non-transitory computer readable medium according to any one of claims 92-99, wherein the configuration for lower layer mobility and theconfiguration for beam management comprise one or more identifiers of transmission configuration indicators, a number of states of transmission configuration indicators in the list, and a reference signal for the transmission configuration indicators in the list.

101. A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus at least to: provide, to a network entity, a capability on transmission configuration indicator state configurations for lower layer mobility and for beam management for one or more candidate cells; receive, from the network entity, a configuration message comprising at least the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells; and determine, after a serving cell switch to a target cell has been completed, active transmission configuration indicator states of the target cell for beam management.

102. The non-transitory computer readable medium according to claim 101, wherein the capability comprises support of the same configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells.

103. The non-transitory computer readable medium according to claim 101, wherein the capability comprises support for a different configuration for the transmission configuration indicator state configurations lower layer mobility and for beam management for the one or more candidate cells.

104. The non-transitory computer readable medium according to claim 102, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell.

105. The non-transitory computer readable medium according to claim 103, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that there is no active transmission configuration indicator state for beam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

106. The non-transitory computer readable medium according to claim 104 or claim 105, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility.

107. The non-transitory computer readable medium according to claim 104 or claim 105, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility.

108. The non-transitory computer readable medium according to claim 101, wherein the configuration message comprises an indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells is the same or different.

109. The non-transitory computer readable medium according to claim 108, wherein the indication is common for all candidate cells.

110. The non-transitory computer readable medium according to claim 108, wherein the indication is for each of the one or more candidate cells.

111. The non-transitory computer readable medium according to claim 108, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is the same, after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for beam management for the target cell.

112. The non-transitory computer readable medium according to claim 108, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: when the indication of whether the transmission configuration indicator state configurations for lower layer mobility and for beam management for the target cell is different, after cell switch to the target cell has been completed, determine that there is no active transmission configuration indicator state forbeam management for the target cell, except an indicated transmission configuration indicator state provided in a cell switch command.

113. The non-transitory computer readable medium according to claim 111 or claim 112, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is active for lower layer mobility.

114. The non-transitory computer readable medium according to claim 111 or claim 112, wherein the instructions, when executed by the apparatus, cause the apparatus at least to: after cell switch to the target cell has been completed, determine that at least one active transmission configuration indicator state for the target cell for lower layer mobility is not active for lower layer mobility.

115. The non-transitory computer readable medium according to any one of claims 101-114, wherein the same transmission configuration indicator state configurations for lower layer mobility and for beam management for the one or more candidate cells comprise the same configuration in terms of at least one of: transmission configuration indicator state identities, a number of transmission configuration indicator states, or reference signals and quasi co-location information included in the transmission configuration indicator states.

116. The non-transitory computer readable medium according to any one of claims 101-115, wherein the instructions, when executed by the apparatus,cause the apparatus at least to: respond to the configuration message by transmitting a configuration completion message.

117. A computer program comprising instructions stored thereon for performing at least the method of claim 30.

118. A computer program comprising instructions stored thereon for performing at least the method of claim 34.

119. A computer program comprising instructions stored thereon for performing at least the method of claim 43.

120. An apparatus comprising one or more circuitry configured to perform the method of claim 30.

121. An apparatus comprising one or more circuitry configured to perform the method of claim 34.

122. An apparatus comprising one or more circuitry configured to perform the method of claim 43.

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