Conditional Handover Using Target Dual Connectivity Configuration

Abstract

1. An apparatus comprising at least one processor and at least one memory including computer program code, the at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus to at least: establish a connection to a user equipment UE via a source primary cell; provide a source primary cell measurement configuration to the UE; determine a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generate, in an updated source primary cell measurement configuration, a measurement identity associated with the condition for accessing the target primary cell of the secondary cell group of the target secondary node associated with the conditional handover to the target master node; include the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in the updated source primary cell measurement configuration; and transmit the updated source primary cell measurement configuration to the user equipment.

Description

[Technical Field]

[0001] Examples of the present disclosure relate to conditional handover, some of which relate to conditional handover using a dual connectivity configuration. [Background technology]

[0002] A wireless network comprises a number of network nodes, including terminal nodes and access nodes, and communication between the terminal nodes and the access nodes is wireless.

[0003] In some situations, it may be desirable to improve or enhance conditional handovers using a target dual connectivity configuration. Summary of the Invention

[0004] According to various, but not necessarily all, embodiments: at least one processor; at least one memory containing computer program code; An apparatus is provided, comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: establishing a connection to a user equipment (UE) via a source primary cell; providing a source primary cell measurement configuration to the UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; Including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in the updated source primary cell measurement configuration; sending an updated source primary cell measurement configuration to the user equipment; It stores the command to

[0005] In some embodiments, determining the conditions for accessing the target primary cell of the secondary cell group comprises receiving information and determining the conditions based at least in part on the received information.

[0006] In some embodiments, the information is received from a target master node and comprises measurement-related information.

[0007] In some embodiments, the measurement related information comprises measurement object information.

[0008] In some embodiments, the at least one memory stores instructions that, when executed by the at least one processor, cause the device to generate at least a reporting configuration of conditions for accessing a target primary cell of a secondary cell group.

[0009] In some embodiments, the conditions comprise conditional PSCell addition and modification CPAC conditions.

[0010] In some embodiments, the updated source primary cell measurement configuration comprises the generated measurement identity and the measurement object information received from the target master node.

[0011] In some embodiments, the updated source primary cell measurement configuration comprises the generated reporting configuration.

[0012] In some embodiments, determining a condition for accessing the target primary cell of the secondary cell group comprises receiving a condition.

[0013] In some embodiments, the at least one memory stores instructions that, when executed by the at least one processor, cause the device to receive at least a report configuration of conditions for accessing a target primary cell of a secondary cell group.

[0014] In some embodiments, the updated source primary cell measurement configuration comprises a conditional handover CHO execution condition.

[0015] In some embodiments, the updated source primary cell measurement configuration comprises a first CHO execution condition and a first condition for accessing a target primary cell of a secondary cell group associated with the first generated measurement identity, and a second CHO execution condition and a second condition for accessing a target primary cell of a secondary cell group associated with the second generated measurement identity, wherein the first condition and the second condition for accessing the target primary cell of the secondary cell group comprise conditional PSCell addition and modification CPAC conditions.

[0016] In some embodiments, the at least one memory, when executed by the at least one processor, provides the device with at least: receiving, in the target primary cell measurement configuration, an indication indicating a second measurement identity associated with a condition for accessing the target primary cell of the secondary cell group; sending an instruction to the UE, after applying the target primary cell measurement configuration, for evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the second measurement identity, to maintain measurement information associated with the evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the generated measurement identity; It stores the command to

[0017] In some embodiments, the indicia indicative of the second measurement identity comprises the second measurement identity.

[0018] According to various, but not necessarily all, embodiments: establishing a connection to a user equipment (UE) via a source primary cell; providing a source primary cell measurement configuration to a UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; Including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in the updated source primary cell measurement configuration; sending an updated source primary cell measurement configuration to the user equipment; A method is provided comprising:

[0019] In some embodiments, determining the conditions for accessing the target primary cell of the secondary cell group comprises receiving information and determining the conditions based at least in part on the received information.

[0020] In some embodiments, determining a condition for accessing the target primary cell of the secondary cell group comprises receiving a condition.

[0021] In some embodiments, the method comprises: receiving, in the target primary cell measurement configuration, an indication indicating a second measurement identity associated with a condition for accessing the target primary cell of the secondary cell group; sending an instruction to the UE, after applying the target primary cell measurement configuration, for evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the second measurement identity, to maintain measurement information associated with the evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the generated measurement identity; It is equipped with:

[0022] According to various, but not all, embodiments, the device comprises at least: establishing a connection to a user equipment (UE) via a source primary cell; providing a source primary cell measurement configuration to a UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; Including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in the updated source primary cell measurement configuration; sending an updated source primary cell measurement configuration to the user equipment; A computer program is provided comprising instructions for causing the computer to execute:

[0023] In some embodiments, determining the conditions for accessing the target primary cell of the secondary cell group comprises receiving information and determining the conditions based at least in part on the received information.

[0024] In some embodiments, determining a condition for accessing the target primary cell of the secondary cell group comprises receiving a condition.

[0025] In some embodiments, the computer program may cause the device to perform at least the following steps: receiving, in the target primary cell measurement configuration, an indication indicating a second measurement identity associated with a condition for accessing the target primary cell of the secondary cell group; sending an instruction to the UE, after applying the target primary cell measurement configuration, for evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the second measurement identity, to maintain measurement information associated with the evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the generated measurement identity; The instruction to execute the above is provided.

[0026] According to various, but not necessarily all, embodiments: at least one processor; at least one memory containing computer program code; An apparatus is provided, comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; It stores the command to

[0027] In some embodiments, the at least one memory, when executed by the at least one processor, provides the device with at least: storing instructions for determining a condition for accessing a target primary cell of a secondary cell group; Transmitting information enabling determination of conditions for accessing the target primary cell of the secondary cell group comprises transmitting the determined conditions.

[0028] In some embodiments, this information comprises measurement-related information.

[0029] In some embodiments, the measurement-related information comprises measurement target information.

[0030] In some embodiments, the at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to determine at least a reporting configuration of conditions for accessing a target primary cell of a secondary cell group, and transmitting information enabling the determination of conditions for accessing a target primary cell of a secondary cell group comprises transmitting the determined reporting configuration.

[0031] In some embodiments, the at least one memory, when executed by the at least one processor, provides the device with at least: The target primary cell measurement configuration stores instructions for transmitting an indication indicating a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group.

[0032] In some embodiments, the indication of a measurement identity comprises a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group in the target primary cell measurement configuration.

[0033] According to various, but not necessarily all, embodiments: receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; A method is provided comprising:

[0034] In some embodiments, the method comprises: determining a condition for accessing a target primary cell of a secondary cell group; Transmitting information enabling determination of conditions for accessing the target primary cell of the secondary cell group comprises transmitting the determined conditions.

[0035] In some embodiments, the method comprises: In the target primary cell measurement configuration, transmitting an indication indicating a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group is provided.

[0036] According to various, but not all, embodiments, the device comprises at least: receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; A computer program is provided comprising instructions for causing the computer to execute:

[0037] In some embodiments, the computer program may cause the device to perform at least the following steps: determining a condition for accessing a target primary cell of a secondary cell group; Transmitting information enabling determination of conditions for accessing the target primary cell of the secondary cell group comprises transmitting the determined conditions.

[0038] In some embodiments, the computer program may cause the device to perform at least the following steps: The method includes instructions for performing, in a target primary cell measurement configuration, sending an indication indicating a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group.

[0039] According to various, but not necessarily all, embodiments: at least one processor; at least one memory containing computer program code; An apparatus is provided, comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; creating at least one measurement variable for the at least one received measurement configuration; It stores the command to

[0040] In some embodiments, at least one measurement configuration is a source primary cell measurement configuration.

[0041] In some embodiments, creating the at least one measurement variable for the received at least one measurement configuration comprises updating the at least one measurement variable associated with the source primary cell to include a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group.

[0042] In some embodiments, the at least one memory, when executed by the at least one processor, provides the device with at least: The method further includes storing instructions to receive, after application of the target primary cell measurement configuration, instructions to maintain measurement information associated with conditions for accessing the target primary cell of the secondary cell group associated with the measurement identity for evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the second measurement identity in the target primary cell measurement configuration.

[0043] In some embodiments, the indication comprises a second measurement identity.

[0044] In some embodiments, the at least one memory stores instructions that, when executed by the at least one processor, cause the device to use the maintained measurement information at least for evaluation of conditions for accessing a target primary cell of a secondary cell group associated with a second measurement identity in a target primary cell measurement configuration.

[0045] In some embodiments, the at least one measurement configuration comprises a target primary cell measurement configuration.

[0046] In some embodiments, creating the at least one measurement variable comprises creating at least one independent measurement variable for the target primary cell measurement configuration.

[0047] In some embodiments, the at least one memory, when executed by the at least one processor, provides the device with at least: Instructions are stored to receive instructions to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration.

[0048] In some embodiments, the indication comprises a flag.

[0049] In some embodiments, the at least one memory stores instructions that, when executed by the at least one processor, cause the device to use the maintained measurement information for evaluating conditions for accessing a target primary cell of a secondary cell group, at least after application of the target primary cell measurement configuration.

[0050] According to various, but not necessarily all, embodiments: Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; creating at least one measurement variable for the at least one received measurement configuration; A method is provided comprising:

[0051] In some embodiments, at least one measurement configuration is a source primary cell measurement configuration.

[0052] In some embodiments, creating the at least one measurement variable for the received at least one measurement configuration comprises updating the at least one measurement variable associated with the source primary cell to include a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group.

[0053] In some embodiments, the method comprises: After applying the target primary cell measurement configuration, receiving an instruction to maintain measurement information associated with conditions for accessing the target primary cell of the secondary cell group associated with the measurement identity in the target primary cell measurement configuration for evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the second measurement identity.

[0054] In some embodiments, the indication comprises a second measurement identity.

[0055] In some embodiments, the at least one measurement configuration comprises a target primary cell measurement configuration.

[0056] In some embodiments, creating at least one measurement variable comprises creating at least one independent measurement variable for the target primary cell measurement configuration.

[0057] In some embodiments, the method comprises: After applying the target primary cell measurement configuration, receiving an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group is also included.

[0058] In some embodiments, the indication comprises an indication indicating a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group in the target primary cell measurement configuration.

[0059] According to various, but not all, embodiments, the device comprises at least: Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; creating at least one measurement variable for the at least one received measurement configuration; A computer program is provided comprising instructions for causing the computer to execute:

[0060] In some embodiments, at least one measurement configuration is a source primary cell measurement configuration.

[0061] In some embodiments, creating the at least one measurement variable for the received at least one measurement configuration comprises updating the at least one measurement variable associated with the source primary cell to include a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group.

[0062] In some embodiments, the computer program may cause the device to perform at least the following steps: The instructions include instructions for executing, after application of the target primary cell measurement configuration, receiving an instruction to maintain measurement information associated with conditions for accessing the target primary cell of the secondary cell group associated with the measurement identity for evaluation of conditions for accessing the target primary cell of the secondary cell group associated with the second measurement identity in the target primary cell measurement configuration.

[0063] In some embodiments, the indication comprises a second measurement identity.

[0064] In some embodiments, the at least one measurement configuration comprises a target primary cell measurement configuration.

[0065] In some embodiments, creating at least one measurement variable comprises creating at least one independent measurement variable for the target primary cell measurement configuration.

[0066] In some embodiments, the computer program may cause the device to perform at least the following steps: The method includes instructions for executing receiving an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration.

[0067] In some embodiments, the indication comprises an indication indicating a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group in the target primary cell measurement configuration.

[0068] According to various, but not necessarily all, embodiments: at least one processor; at least one memory containing computer program code; An apparatus is provided, comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: receiving a handover request; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the target primary cell measurement configuration, a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group; including the generated measurement identity and the determined conditions in a target primary cell measurement configuration; Sending a target primary cell measurement configuration to the source master node; sending an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; It stores the command to

[0069] In some embodiments, the indication comprises a flag.

[0070] In some embodiments, the instructions comprise instructions to maintain measurement information for evaluation of conditions for accessing a target primary cell of the secondary cell group after performing a conditional handover CHO.

[0071] According to various, but not necessarily all, embodiments: at least one processor; at least one memory containing computer program code; An apparatus is provided, comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: receiving, from the target master node, a target primary cell measurement configuration including a measurement identity and a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with the conditional handover to the target master node; receiving an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; sending a target primary cell measurement configuration and instruction to the user equipment; It stores the command to

[0072] In some embodiments, the indication comprises a flag.

[0073] According to various, but not necessarily all, embodiments: at least one processor; at least one memory containing computer program code; An apparatus is provided, comprising: The at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to perform at least a portion of one or more methods disclosed herein.

[0074] According to various, but not necessarily all, embodiments, there is provided an apparatus comprising means for performing at least a portion of one or more of the methods disclosed herein.

[0075] According to various, but not necessarily all, embodiments, examples are provided as claimed in the following claims.

[0076] A description of a function should additionally be considered to disclose any suitable means for performing that function.

[0077] Some embodiments will now be described with reference to the accompanying drawings. [Brief explanation of the drawings]

[0078] [Figure 1] 1 illustrates an example of the subject matter described herein. [Figure 2] FIG. 1 illustrates another example of the subject matter described herein. [Figure 3] FIG. 1 illustrates another example of the subject matter described herein. [Figure 4] FIG. 1 illustrates another example of the subject matter described herein. [Figure 5] FIG. 1 illustrates another example of the subject matter described herein. [Figure 6] FIG. 1 illustrates another example of the subject matter described herein. [Figure 7] FIG. 1 illustrates another example of the subject matter described herein. [Figure 8] FIG. 1 illustrates another example of the subject matter described herein. [Figure 9] FIG. 1 illustrates another example of the subject matter described herein. [Figure 10] FIG. 1 illustrates another example of the subject matter described herein. [Figure 11] FIG. 1 illustrates another example of the subject matter described herein. [Figure 12A] FIG. 1 illustrates another example of the subject matter described herein. [Figure 12B] FIG. 1 illustrates another example of the subject matter described herein. DETAILED DESCRIPTION OF THE INVENTION

[0079] The drawings are not necessarily to scale. Some features or aspects of the drawings may be illustrated schematically or exaggerated for clarity and conciseness. For example, the dimensions of some elements in the drawings may be exaggerated relative to other elements for clarity. Like reference numbers are used in the drawings to denote similar features. For clarity, not all reference numbers are shown in every drawing.

[0080] definition

[0081] Master Node (MN): A network node that provides the control plane connection to the core network.

[0082] Master Cell Group (MCG): A group of cells that includes PCells and SCells and is associated with an MN.

[0083] Secondary Node (SN): A network node that provides additional radio resources for a UE, but is not an MN.

[0084] Secondary Cell Group (SCG): A group of cells that includes PSCells and SCells and is associated with an SN.

[0085] PCell: A cell for uplink / downlink connection to the MN. A cell of the MCG used to initiate initial access to the MN.

[0086] PSCell: A cell for uplink / downlink connection to the SN. A cell in the SCG used to initiate initial access to the SN.

[0087] Conditional Handover (CHO) - A handover procedure that is triggered by the UE only if configured execution conditions are met for the prepared candidate cells. The conditions are pre-configured by the network. In 3GPP, the conditional handover execution conditions are specified by the condExecutionCond in the CondReconfigToAddModList information element in the ConditionalReconfiguration information element in the RRCReconfiguration message.

[0088] Dual Connectivity (DC): The UE has simultaneous connections to the MN and the SN. This is the UE's operating mode in RRC_CONNECTED, configured with a master cell group and a secondary cell group.

[0089] Configuration information: Information used to configure the operation of a UE. In 3GPP, configuration information can be provided, for example, in an RRCReconfiguration message. The term "configuration information comprising" an entity (e.g., a handover execution condition for a primary cell, an SN addition condition for dual connectivity with a primary cell, etc.) can mean that the configuration information comprises sufficient information to obtain the entity. It may or may not comprise all parameters of the entity, and instead may comprise a pointer to the entity or parameters of the entity, or it may mean that the configuration does not include the entity.

[0090] In 3GPP, the RRCReconfiguration message specifies a ConditionalReconfiguration information element that provides additional conditions for DC. The ConditionalReconfiguration information element includes a CondReconfigToAddModList information element. The CondReconfigToAddModList information element includes condExecutionCond and condRRCReconfig. Additional conditions for the primary secondary cell (PSCell) are specified by condExecutionCond. The RRCReconfiguration message to be applied when the specified conditions are met is provided by condRRCReconfig.

[0091] Measurement Configuration Configuration information used to configure the UE to perform measurements. In 3GPP, the measurement configuration can be provided, for example, in an RRCReconfiguration message. The term "[entity] measurement configuration" (e.g., source primary cell measurement configuration) can refer to a measurement configuration prepared by an entity.

[0092] It may comprise one or more measurement objects associated by one or more measurement identities and one or more report configurations.

[0093] It may comprise a MeasConfig information element as defined in TS38.331.

[0094] Measurement target It defines one or more objects, e.g., carrier frequencies, that the UE measures, and may include a list of cells (e.g., whitelist and blacklist) that the UE should consider for measurements, and / or frequency / cell-specific parameters to be used in the measurement event, e.g., frequency-specific offsets of the frequencies of neighboring cells and / or cell-specific offsets of neighboring cells.

[0095] Report Configuration Defines the configuration of measurement reports that the UE sends to the network. It indicates the measurement quantities, e.g., Received Signal Received Power (RSRP) and / or Reference Signal Received Quality (RSRQ), and, e.g., whether the measurements should be reported periodically or based on measurement events. In the latter case, the configuration can specify the event to be used, e.g., A3 event, and its corresponding parameters, such as time to trigger, hysteresis, etc. The report configuration can configure, e.g., conditional handover (CHO) conditions and / or conditional PSCell addition and modification (CPAC) conditions to the master node and / or secondary node.

[0096] Measurement Identity (ID) An identifier that can be associated with a condition for accessing a cell, such as a primary cell of a secondary cell group. It can be an identifier that associates a measurement object with a reporting configuration in a measurement configuration.

[0097] Measurement variables In DC, the UE can receive two independent measurement configurations from the source MN and SN. For each measurement configuration, the UE maintains at least two measurement variables: VarMeasConfig and VarMeasReportList. The UE variable VarMeasConfig contains the accumulated configuration of measurements performed by the UE covering intra-frequency, inter-frequency and inter-RAT mobility measurements. The UE variable VarMeasReportList contains information about measurements for which the trigger condition has been met.

[0098] Detailed explanation

[0099] 1 illustrates an embodiment of a network 100 comprising multiple network nodes, including end nodes 110, access nodes 120, and one or more core nodes 129. The end nodes 110 and the access nodes 120 communicate with each other. The one or more core nodes 129 communicate with the access nodes 120.

[0100] In this embodiment, network 100 is a wireless communication network, in which at least some of the end nodes 110 and access nodes 120 communicate with each other using the transmission and reception of radio waves / signals.

[0101] One or more core nodes 129 may, in some embodiments, communicate with each other. One or more access nodes 120 may, in some embodiments, communicate with each other.

[0102] Network 100 may be a cellular network comprising multiple cells 122, each served by an access node 120. In this embodiment, the interface between end node 110 and access node 120 that defines cell 122 is a wireless interface 124.

[0103] The access node 120 is a cellular radio transceiver. The end node 110 is a cellular radio transceiver.

[0104] In the illustrated embodiment, cellular network 100 is a 3rd Generation Partnership Project (3GPP) network in which end nodes 110 are user equipment (UE) and access nodes 120 are base stations.

[0105] In the embodiment, network 100 is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN). E-UTRAN consists of E-UTRAN NodeBs (eNBs) 120, which provide E-UTRA user plane and control plane (RRC) protocol termination to UEs 110. The eNBs 120 are interconnected with each other by an X2 interface 126. The eNBs are also connected to a Mobility Management Entity (MME) 129 by an S1 interface 128.

[0106] In another embodiment, network 100 is a Next Generation (or New Radio, NR) Radio Access Network (NG-RAN). The NG-RAN consists of gNodeBs (gNBs) 120, which provide user plane and control plane (RRC) protocol termination to UEs 110. The gNBs 120 are interconnected with each other by an Xn interface 126. The gNBs are also connected to an Access and Mobility Management Function (AMF) by an N2 interface 128.

[0107] In an embodiment, the network 100 may comprise a combination of E-UTRAN and NG-RAN.

[0108] User equipment comprises mobile equipment. Where there is a reference to user equipment, the reference includes and encompasses, to the extent possible, a reference to a mobile device.

[0109] The UE 150 may perform a handover procedure to change the serving cell of the UE 150. In an embodiment, the handover procedure may be a conditional handover procedure.

[0110] A conditional handover (CHO) procedure may be considered as a handover triggered by the UE 150 when one or more handover execution conditions are met. The handover execution conditions may be pre-configured by the network 100.

[0111] In an embodiment, upon receiving the CHO configuration, UE 150 starts evaluating the execution conditions of the CHO candidate cells, and executes the handover command when the execution conditions of the CHO candidate cells are satisfied. UE 150 may stop evaluating the execution conditions of other candidate cells when the execution conditions of the candidate cells are satisfied.

[0112] In an embodiment, dual connectivity (DC) may be used to provide the UE 150 with additional radio resources.

[0113] In DC, the configured set of serving cells for UE 150 has two subsets: a master cell group (MCG) containing the serving cells of master node (MN) 152, and a secondary cell group (SCG) containing the serving cells of secondary node (SN) 153.

[0114] In an embodiment, a conditional handover with dual connectivity can be configured: the UE 150 can be configured with a condition to perform a CHO to one or more target MNs 154 and a condition to perform a handover to one or more target SNs 156.

[0115] In an embodiment, a terminal node 110, such as a UE 150, may be configured to efficiently manage measurement information during a conditional handover and may efficiently manage measurement information.

[0116] FIG. 2 illustrates an embodiment of a method 200 .

[0117] In an example, Figure 2 can be considered to illustrate multiple methods. For example, Figure 2 illustrates one or more actions among multiple actors / entities. In an example, Figure 2 can be considered to illustrate multiple methods performed by individual actors / entities.

[0118] One or more of the features discussed in connection with FIG. 2 may also be found in one or more of the other drawings.

[0119] In the example of Figure 2, multiple devices send and / or receive one or more signals and / or one or more messages over and / or using a network. In the example, any suitable form of communication in any suitable network may be used. For example, at least a portion of network 100 of Figure 1 may be used.

[0120] Thus, in an embodiment, the devices in FIG. 2 form at least a portion of the network 100 described in relation to FIG.

[0121] In the illustrated embodiment, one or more signals and / or one or more messages are transmitted and / or received by terminal node 110 and three access nodes 120. In the example of Figure 2, terminal node 110 is UE 150, and the three access nodes 120 are source MN 152, target MN 154, and target SN 156.

[0122] In an embodiment (not illustrated in FIG. 2), UE 150 may also be connected to a source SN.

[0123] In embodiments, communication and / or transmission between the elements illustrated in FIG. 2 may proceed through any number of intervening elements, including zero intervening elements.

[0124] Although one UE 150 is illustrated in the embodiment of FIG. 2, an embodiment may include any suitable number of UEs 150.

[0125] Similarly, an embodiment may include any suitable number of network nodes.

[0126] In an embodiment, method 200 and / or portions of method 200 may be considered a method for enhancing conditional handover.

[0127] In an embodiment, the method 200 and / or one or more portions of the method 200 may be considered a method for enhancing conditional handover with dual connectivity.

[0128] In an embodiment, method 200 and / or one or more portions of method 200 can be considered a method for working with measurement variables.

[0129] In an embodiment, the method 200 and / or one or more portions of the method 200 may be considered a method for handling UE measurement information.

[0130] In the illustrated embodiment, the location of the block indicates the entity that performs the action, for example, block 212 is performed in / by source MN 152.

[0131] In block 202, the method 200 comprises, from the perspective of the source MN 152, establishing a connection to the user equipment UE 150 via the source primary cell 174 (Pcell of the source MN 152).

[0132] In some embodiments, a source MN 152 may be considered a source MN 152 if a connection to the UE is established.

[0133] From the perspective of the UE 150, block 202 comprises establishing a connection to the source master node 152.

[0134] This is illustrated in the example of FIG. 2 by the double-headed arrow between the UE 150 and the source MN 152.

[0135] Thus, block 202 can be considered to comprise establishing a connection between the UE 150 and the source MN 152 .

[0136] Establishing the connection may be performed in any suitable manner using any suitable method.

[0137] In some embodiments, establishing the connection comprises establishing an active wireless link.

[0138] In some embodiments, establishing the connection comprises sending and / or receiving one or more signals.

[0139] In some embodiments, establishing the connection comprises performing a random access procedure. For example, UE 150 may perform a random access procedure with source MN 152 to establish a connection to source MN 152.

[0140] When a connection between the UE 150 and the source MN 152 is established, e.g., The UE 150 can now directly access the source MN 152, A radio link is established between the UE 150 and the source MN 152 / source primary cell 174, allowing the transfer of data over the uplink (UL) and / or downlink (DL). The radio link may, for example, include a RACH procedure at the UE 150, This can be established by initiating traffic flow over bearers between the UE 150 and the network via the source MN 152 / source primary cell 174.

[0141] At block 204 , the method 200 comprises providing the UE 150 with a source primary cell measurement configuration 148 .

[0142] In an embodiment, block 204 may be considered to comprise transmitting the source primary cell measurement configuration 148 to the UE 150 .

[0143] FIG. 2 illustrates, for example, one or more actions of transmitting one or more signals, and FIG. 2 also illustrates the corresponding transmissions / features / actions that cause the transmissions.

[0144] Similarly, for any send / feature / action that causes a send, FIG. 2 also illustrates a corresponding receive / feature / action that causes a receive.

[0145] For example, from the perspective of the source MN 152, block 204 may be considered to illustrate providing the source primary cell measurement configuration 148 to the UE 150.

[0146] Similarly, from the perspective of the UE 150, block 204 may be considered to illustrate receiving the source primary cell measurement configuration 148.

[0147] Providing the UE 150 with the source primary cell measurement configuration 148 may be performed in any suitable manner using any suitable method.

[0148] In an embodiment, providing UE 150 with source primary cell measurement configuration 148 comprises sending / receiving one or more signals and / or messages.

[0149] In block 206, the method 200 comprises receiving a handover request 151 from the perspective of the target MN 154. Thus, from the perspective of the source MN 152, block 206 illustrates sending a handover request 151.

[0150] The handover request 151 may have any suitable form and may be sent in any suitable manner using any suitable method.

[0151] In an embodiment, receiving the handover request 151 comprises receiving one or more signals and / or messages.

[0152] Receiving the handover request 151 may comprise receiving a handover request message.

[0153] Handover request 151 may comprise any suitable information. In an embodiment, handover request 151 comprises information requesting target MN 154 to prepare for handover of its connection with UE 150.

[0154] In some embodiments, the handover request indicates that a conditional handover should be configured.

[0155] In block 208, the method 200 comprises determining information 158 that enables determining conditions 140 for accessing a target primary cell of a secondary cell group 142 (PSCell) of a target secondary node 156 associated with the conditional handover to the target master node 154.

[0156] In an embodiment, the condition 140 should be associated with a measurement identity 146 generated by the source master node 152 in the source primary cell measurement configuration 148 .

[0157] Information 158 may be determined in any suitable manner.

[0158] As used herein, the term "determining" (and grammatical variations thereof) can include at least calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, database, or another data structure), ascertaining, etc. "Determining" can also include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), etc. "Determining" can also include resolving, selecting, choosing, establishing, etc.

[0159] In an embodiment, determining information 158 comprises sending / receiving one or more signals and / or messages comprising the information to / from target SN 156. This is illustrated in the embodiment of FIG. 2 by the double-headed arrow between block 208 and target SN 156.

[0160] For example, the target MN 154 may send an SN Add Request message to the target SN 156 , and the target SN 156 may send an SN Add Response message to the target MN 154 .

[0161] Information 158 may comprise any suitable information. For example, information 158 may comprise any suitable information that enables determination of conditions 140 for accessing a target primary cell of secondary cell group 142 of target secondary node 156 associated with a conditional handover to target master node 154.

[0162] In an embodiment, information 158 comprises measurement-related information. The measurement-related information may comprise information about candidate target PSCells.

[0163] In some embodiments, the measurement-related information comprises measurement object information. For example, the measurement object information may include: PCI and the frequency of the prepared target PSCell, SSB related configuration: SSB frequency, SSB subcarrier spacing, SSB index to measure, quasi-colocation relationship between SSB blocks, CSI-RS related configuration: CSI-RS reference frequency (e.g., see point A of 38.331); Parameters for deriving cell quality measurements: number of beam measurements to average, threshold for beam measurements used to derive cell quality, SMTC (measurement timing) configuration, White Cell List / Black Cell List It may comprise at least one of:

[0164] In some embodiments, determining information 158 in block 208 comprises determining conditions 140 for accessing a target primary cell of secondary cell group 142 .

[0165] Thus, in an embodiment, the determined information 158 comprises the conditions 140 for accessing the target primary cell of the secondary cell group 142 .

[0166] Condition 140 may be determined in any suitable manner using any suitable method.

[0167] In an embodiment, determining the condition 140 comprises processing and / or evaluating information, such as measurement-related information, to determine the condition 140 .

[0168] The conditions 140 may comprise any suitable conditions 140 .

[0169] In some embodiments, the condition 140 may be a radio signal condition. For example, the condition 140 may comprise a received radio signal power condition and / or a received radio signal quality condition.

[0170] In an embodiment, the condition 140 may be based on and / or related to a reference signal received power (RSRP) and / or a reference signal received quality (RSRQ).

[0171] In an embodiment, the condition 140 may comprise, for example, an A3, A4, or A5 event.

[0172] In some embodiments, the condition 140 may be a Conditional PSCell Addition and Modification (CPAC) condition.

[0173] In an embodiment, multiple conditions 140 may be determined.

[0174] In an embodiment, accessing the target primary cell, or any other suitable cell, of the secondary cell group comprises performing a random access procedure with the cell.

[0175] In an embodiment, accessing the target primary cell, or any other suitable cell, of the secondary cell group comprises establishing a connection with the cell.

[0176] In some embodiments, determining information 158 comprises determining a reporting configuration of measurement objects and / or conditions 140 for accessing a target primary cell of secondary cell group 142 .

[0177] In an embodiment, conditions 140 may be included in the report configuration.

[0178] Thus, in an embodiment, information 158 comprises measurement targets and reporting configurations for conditions 140 for accessing a target primary cell of secondary cell group 142 .

[0179] At block 210 , the method 200 comprises transmitting the determined information 158 to the source master node 152 .

[0180] Thus, in an embodiment, block 210 comprises transmitting information 158 enabling determination of conditions 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with a conditional handover to a target master node 154 associated with a measurement identity 146 generated by the source master node 152 in the source primary cell measurement configuration 148.

[0181] Thus, FIG. 2 illustrates a method 200 comprising receiving a handover request 151 and transmitting information 158 enabling determination of conditions 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with a conditional handover to a target master node 154 associated with a measurement identity generated by the source master node 152 in a source primary cell measurement configuration 148.

[0182] As mentioned above, in some embodiments, determined information 158 comprises conditions 140 .

[0183] Thus, in an embodiment, method 200 comprises, for example, determining, at / by target MN 154, conditions 140 for accessing a target primary cell of secondary cell group 142, and transmitting information 158 enabling determination of conditions for accessing a target primary cell of secondary cell group 142 comprises transmitting the determined conditions.

[0184] As previously mentioned, in some embodiments, determined information 158 comprises a reporting configuration of conditions 140 for accessing a target primary cell of secondary cell group 142 .

[0185] Thus, in an embodiment, the method 200 comprises determining, e.g., at / by the target MN 154, a reporting configuration of the conditions 140 for accessing the target primary cell of the secondary cell group 142, and transmitting the information 158 enabling the determination of the conditions 140 for accessing the target primary cell of the secondary cell group 142 comprises transmitting the determined reporting configuration.

[0186] The determined information 158 can be sent as part of the handover request acknowledge message.

[0187] In an embodiment, the target MN 154 determines the target primary cell measurement configuration 162. Thus, in some embodiments, the method 200 comprises determining the target primary cell measurement configuration 162, for example, at / by the target MN 154.

[0188] The target primary cell measurement configuration 162 may include conditions 140 for accessing the target primary cell of the secondary cell group 142 .

[0189] In an embodiment, the target MN 154 may transmit the target primary cell measurement configuration 162 to the source MN 152. Thus, in an embodiment, the method 200 comprises transmitting the target primary cell measurement configuration 162 to the source MN 152 and receiving the target primary cell measurement configuration 162 by the source MN 152 in response.

[0190] In some embodiments, in addition to the determined information 158, a target primary cell measurement configuration 162 is transmitted.

[0191] At block 212, the method 200 comprises determining a condition 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154.

[0192] Condition 140 may be or comprise any suitable condition 140. In an embodiment, condition 140 may be or comprise the condition 140 described in connection with block 208.

[0193] Thus, in some embodiments, conditions 140 comprise conditional PSCell addition and modification CPAC conditions.

[0194] Block 212 may be performed in any suitable manner using any suitable method.

[0195] Determining the condition 140 may comprise receiving and / or processing information.

[0196] In some embodiments, determining the conditions 140 for accessing the target primary cell of the secondary cell group comprises receiving information 158 and determining the conditions based at least in part on the received information 158.

[0197] The information 158 may be information 158 received from the target MN 154. Thus, in an embodiment, the information 158 may be information 158 determined in block 208 and may be as described in connection with block 208.

[0198] Thus, in some embodiments, information 158 is received from target MN 154 and comprises measurement-related information.

[0199] Thus, in some embodiments, the measurement-related information comprises measurement object information.

[0200] In an embodiment, the source MN 152 generates a report configuration of the conditions 140 for accessing the target primary cell of the secondary cell group 142 .

[0201] Thus, in some embodiments, the method 200 comprises generating, for example, at and / or by the source MN 152, a reporting configuration of conditions 140 for accessing a target primary cell of the secondary cell group 142.

[0202] In an embodiment, the conditions 140 are included in the determined reporting configuration. As mentioned above, in some embodiments, block 208 can comprise determining the conditions 140 for accessing the target primary cell of the secondary cell group 142.

[0203] Thus, in some embodiments, determining the conditions 140 for accessing the target primary cell of the secondary cell group 142 in block 210 comprises receiving the conditions 140 .

[0204] In an embodiment, the source MN 152 receives a report configuration of conditions 140 for accessing a target primary cell of a secondary cell group 142 .

[0205] Thus, in some embodiments, the method 200 comprises receiving, at and / or by the source MN 152, a report configuration of conditions 140 for accessing a target primary cell of a secondary cell group 142.

[0206] A report configuration for the condition 140 may be received along with the information 158 in block 210 .

[0207] In some embodiments, the reporting configuration of the condition 140 is received from the target MN separately from the information 158 at block 210 .

[0208] In block 214, the method 200 includes generating a measurement identity 146 associated with a condition 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154 in the updated source primary cell measurement configuration 148a.

[0209] Thus, in an embodiment, if the target MN 154 provides measurement target information, the source MN 152 can determine the report configuration and generate the measurement ID 146 (see, eg, block 214).

[0210] Thus, in an embodiment, if the target MN 154 provides measurement objects and reporting configurations, the source MN 152 can determine a measurement ID 146 (see, e.g., block 214) to associate the received measurement objects with the received reporting configurations.

[0211] In an embodiment, the source MN 152 includes the generated measurement ID 146, the received measurement objects, and the received or generated report configuration in its measurement configuration (see, eg, block 216).

[0212] Block 214 may be performed in any suitable manner using any suitable method.

[0213] In an embodiment, generating the measurement identity 146 in block 214 comprises creating and / or selecting and / or choosing and / or determining the measurement identity 146 .

[0214] In some embodiments, generating the measurement identity 146 in block 214 comprises selecting the measurement identity 146 from a set of pre-defined measurement identities.

[0215] As indicated by the location of block 214 in the embodiment of FIG. 2, in an embodiment, block 214 is performed in and / or by source MN 152 .

[0216] Thus, in an embodiment, in the updated source primary cell measurement configuration 148a, the measurement identity 146 associated with the condition 140 for accessing the target primary cell of the secondary cell group 142 of the target secondary node 156 associated with the conditional handover to the target master node 154 is generated by the source MN 152 and not by the target MN 154.

[0217] That is, in an embodiment, in the updated source primary cell measurement configuration 148a, the measurement identity 146 associated with the condition 140 for accessing the target primary cell of the secondary cell group 142 of the target secondary node 156 associated with the conditional handover to the target master node 154 is not generated and / or created before the source MN 152 receives the information 158 in block 210.

[0218] That is, in an embodiment, in the updated source primary cell measurement configuration 148a, the measurement identity 146 associated with the condition 140 for accessing the target primary cell of the secondary cell group 142 of the target secondary node 156 associated with the conditional handover to the target master node 154 is generated and / or created after the source MN 152 receives the information 158 in block 210.

[0219] At block 216, the method 200 comprises including the generated measurement identity 146 and the condition 140 for accessing the target primary cell of the secondary cell group 142 in an updated source primary cell measurement configuration 148a.

[0220] Block 216 may be performed in any suitable manner using any suitable method.

[0221] In an embodiment, including the generated measurement identity 146 and the conditions 140 for accessing the target primary cell of the secondary cell group 142 in the updated source primary cell measurement configuration 148a comprises inserting and / or entering and / or including data and / or information in one or more data structures.

[0222] In some embodiments, block 216 comprises associating, connecting, linking, and / or relating the generated measurement identity 146 with the conditions 140 for accessing the target primary cell of the secondary cell group 142 in the updated source primary cell measurement configuration 148a.

[0223] In some embodiments, block 216 comprises associating the generated measurement identity 146 with a measurement object and a reporting configuration of conditions 140 for accessing a primary cell of a secondary cell group 142 .

[0224] In some embodiments, block 216 comprises including the generated measurement identity 146 in a data structure in association with an identifier of the measurement object and an identifier of the reporting configuration of the conditions 140 for accessing the target primary cell of the secondary cell group 142.

[0225] Thus, in an embodiment, the updated source primary cell measurement configuration 148 a comprises the generated measurement identity 146 and the measurement object information received from the target MN 154 .

[0226] Thus, in an embodiment, the updated source primary cell measurement configuration 148a comprises the generated reporting configuration, ie, in an embodiment, the reporting configuration generated by the source MN 152.

[0227] Thus, in an embodiment, the updated source primary cell measurement configuration 148 a comprises the reporting configuration received from the target MN 154 .

[0228] In an embodiment, the updated source primary cell measurement configuration 148a comprises a conditional handover (CHO) execution condition.

[0229] In some embodiments, there are multiple conditions 140 for accessing multiple target primary cells in a secondary cell group 142 .

[0230] In some embodiments, the updated source primary cell measurement configuration 148a comprises a first CHO execution condition and a first condition 140a for accessing a target primary cell of the secondary cell group 142a associated with the first generated measurement identity ID1, and a second CHO execution condition and a second condition 140b for accessing a target primary cell of the secondary cell group 142b associated with the second generated measurement identity ID2, and the first condition and second condition 140a, 140b for accessing the target primary cell of the secondary cell groups 142a, 142b comprise a conditional PSCell addition condition and a modified CPAC condition.

[0231] In an embodiment, the first CHO running condition and the second CHO running condition can be the same.

[0232] In block 218, the method 200 comprises receiving, from the source master node 152, at least one measurement configuration 170 including conditions 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154, from the perspective of the UE 150.

[0233] From the perspective of the source MN 152, block 218 comprises transmitting to the UE 150 at least one measurement configuration 170 including conditions 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154.

[0234] In an embodiment, the condition 140 is the condition 140 determined in block 212 .

[0235] The at least one measurement configuration 170 may be transmitted as part of an RRC reconfiguration message.

[0236] The at least one measurement configuration 170 may comprise any suitable measurement configuration 170 or multiple measurement configurations 170 .

[0237] In some embodiments, at least one measurement configuration 170 is a source primary cell measurement configuration 148 .

[0238] In some embodiments, the at least one measurement configuration 170 is the updated source primary cell measurement configuration 148 a of block 216 .

[0239] Thus, in an embodiment, block 218 comprises transmitting the updated source primary cell measurement configuration 148 a to the user equipment 150 .

[0240] Therefore, Figure 2 establishing a connection to user equipment UE 150 via a source primary cell 174; providing a source primary cell measurement configuration 148 to a UE 150; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating a measurement identity 146 associated with a condition for accessing a target primary cell of the secondary cell group 142 in the updated source primary cell measurement configuration 148a; Including the generated measurement identity 146 and the conditions for accessing the target primary cell of the secondary cell group 142 in the updated source primary cell measurement configuration 148a; and transmitting the updated source primary cell measurement configuration 148a to the user equipment 150.

[0241] In some embodiments, the at least one measurement configuration 170 comprises a target primary cell measurement configuration 162 .

[0242] The target primary cell measurement configuration 162 may comprise the target primary cell measurement configuration 162 received by the source MN 152 from the target MN 154 .

[0243] At block 220 , the method 200 comprises creating at least one measurement variable 172 for the received at least one measurement configuration 170 .

[0244] Therefore, Figure 2 establishing a connection to the source master node 152; receiving, from the source master node 152, at least one measurement configuration 170 including conditions for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with a conditional handover to the target master node 154; and generating at least one measurement variable 172 for the at least one received measurement configuration 170.

[0245] In an embodiment, generating at least one measurement variable 172 may be performed in any suitable manner using any suitable method.

[0246] In some embodiments, creating at least one measurement variable 172 comprises updating at least one measurement variable 172 and / or creating at least one measurement variable 172.

[0247] As discussed above, in an embodiment, the at least one measurement configuration 170 may be the source primary cell measurement configuration 148 and the updated source primary cell measurement configuration 148 a of block 216 .

[0248] In an embodiment, creating at least one measurement variable 172 for the received at least one measurement configuration 170 comprises updating the at least one measurement variable 172 associated with the source primary cell 174 to include a measurement identity 146 associated with a condition for accessing the target primary cell of the secondary cell group 142.

[0249] In some embodiments, the measurement identity 146 is the measurement identity 146 generated in block 214 .

[0250] As mentioned above, in an embodiment, the at least one measurement configuration 170 comprises the target primary cell measurement configuration 162 .

[0251] In some embodiments, target primary cell measurement configuration 162 may comprise a target primary cell measurement configuration 162 received by source MN 152 from target MN 154 .

[0252] In an embodiment, creating at least one measurement variable 172 comprises creating at least one independent measurement variable 172 for the target primary cell measurement configuration 162 .

[0253] In some embodiments, the at least one measurement configuration 170 may comprise multiple target primary cell measurement configurations 162, and creating the at least one measurement variable 172 may comprise creating at least one independent measurement variable 172 for each target primary cell measurement configuration 162.

[0254] As described above, in some embodiments, the source MN 152 receives the conditions 140 for accessing the target primary cell of the secondary cell group 142 from the target MN 154 in block 212, performs blocks 214 and 216, and transmits an updated source primary cell measurement configuration 148a to the UE 150.

[0255] In some such embodiments, the target MN 154 determines a target primary cell measurement configuration 162 and associates the conditions 140 for accessing the target primary cell of the secondary cell group 142 with a measurement identity, which may be considered a second measurement identity 166 in the target primary cell measurement configuration 162. The target MN 154 may provide the target primary cell measurement configuration 162 to the source MN 152.

[0256] In some such embodiments, the target MN 154 may, for example, send an indication 160 to the source MN 152 indicating a measurement identity, which may be considered a second measurement identity 166 associated with the condition 140 for accessing the target primary cell of the secondary cell group 142 in the target primary cell measurement configuration 162.

[0257] Thus, in an embodiment, the method 200 comprises, for example, transmitting, in and / or by the target MN, an indication 160 indicating a measurement identity associated with the conditions 140 for accessing the target primary cell of the secondary cell group 142 in a target primary cell measurement configuration 162.

[0258] The instructions may be transmitted in any suitable manner using any suitable method.

[0259] In some embodiments, the instructions 160 may be transmitted together with the information 158 in block 210 or may be transmitted separately from the information 158 in block 210 .

[0260] In an embodiment, the indication 160 may be included in a handover request acknowledge message.

[0261] The indication 160 may have any suitable form. For example, the indication may have any suitable form for indicating a measurement identity associated with the condition 140 for accessing the target primary cell of the secondary cell group 142 in the target primary cell measurement configuration 162. The indication 160 may comprise any suitable flag, indicator, or the like.

[0262] In some embodiments, the indication 160 of a measurement identity comprises a measurement identity associated with a condition 140 for accessing a target primary cell of a secondary cell group 142 in a target primary cell measurement configuration 162 .

[0263] Thus, from the perspective of the source MN 152, the method 200 may comprise, for example, receiving, at and / or by the source MN 152, an indication 160 indicating a second measurement identity 166 associated with the conditions 140 for accessing the target primary cell of the secondary cell group 142 in the target primary cell measurement configuration 162, as described above.

[0264] In an embodiment, the source MN 152 may transmit an instruction 164 to the UE 150 to maintain measurement information associated with the evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 associated with the generated measurement identity 146 for evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 associated with the second measurement identity 162 after application of the target primary cell measurement configuration 162.

[0265] Thus, the method 200: For example, receiving an indication 160 at and / or by the source MN 152 indicating a second measurement identity 166 associated with a condition 140 for accessing a target primary cell of the secondary cell group 142 in a target primary cell measurement configuration 162; After applying the target primary cell measurement configuration 162, for evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 associated with the second measurement identity 162, an instruction 164 may be sent to the UE 150 to maintain measurement information associated with the evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 associated with the generated measurement identity 146.

[0266] The maintaining instruction 164 may have any suitable form. For example, the maintaining instruction 164 may have any suitable form for indicating to the UE 150 to maintain measurement information associated with the evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 associated with the generated measurement identity 146 for the evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 associated with the second measurement identity 162 after application of the target primary cell measurement configuration 162. The maintaining instruction 164 may comprise any suitable flag, indicator, or the like.

[0267] The instructions to maintain 164 may be transmitted in any suitable manner using any suitable method.

[0268] In some embodiments, the instructions to maintain 164 may be transmitted in block 218 or separately from block 218 .

[0269] In an embodiment, the maintaining instruction 164 may be included in an RRC reconfiguration message.

[0270] In some embodiments, the source MN 154 transmits an indication 160 to the UE 150 indicating a measurement identity that can be considered a second measurement identity 166 associated with the condition 140 for accessing the target primary cell of the secondary cell group 142 in the target primary cell measurement configuration 162.

[0271] The instructions 160 may be transmitted in any suitable manner using any suitable method.

[0272] In some embodiments, the instructions 160 may be sent in block 218 or separately from block 218 .

[0273] In an embodiment, the indication 160 may be included in an RRC reconfiguration message.

[0274] In some embodiments, the instructions to maintain 164 may comprise instructions 160 indicating a measurement identity, which may be considered a second measurement identity 166 .

[0275] Thus, from the perspective of UE 150, method 200 may comprise receiving, after application of target primary cell measurement configuration 162, an instruction 164 to maintain measurement information associated with conditions 140 for accessing a target primary cell of secondary cell group 142 associated with measurement identity 146 for evaluation of conditions 140 for accessing a target primary cell of secondary cell group 142 associated with second measurement identity 162 in target primary cell measurement configuration 162.

[0276] The instructions 164 to maintain can be as described above. For example, the instructions 164 can comprise a second measurement identity 166.

[0277] As described above, in some embodiments, the at least one measurement configuration 170 received by the UE 150 in block 218 comprises a target primary cell measurement configuration 162, and the UE 150 creates at least one independent measurement variable 172 for the target primary cell measurement configuration 162.

[0278] In some such embodiments, the target MN 154 may provide instructions 164 to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162. See, e.g., FIG.

[0279] The instruction to maintain 164 may be provided to the source MN 152, for example, in a conditional handover configuration.

[0280] In some embodiments, the maintaining instruction 164 is provided to the source MN 152 as part of the handover request acknowledge message.

[0281] In some such embodiments, the maintaining instruction 164 may have any suitable form. For example, the maintaining instruction 164 may have any suitable form for instructing the UE 150 to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162.

[0282] In some embodiments, the indication to maintain 164 comprises a flag.

[0283] In an embodiment, the source MN 152 sends a maintain instruction 164 to the UE 150 .

[0284] In some embodiments, the instructions 164 may be sent in block 218 or may be sent separately from block 218 .

[0285] Thus, from the perspective of the UE 150, in some such embodiments, the method 200 may comprise receiving an instruction 164 to maintain measurement information for evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162.

[0286] For example, the UE 150 may receive instructions 164 to maintain measurement information for evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 obtained in association with at least one independent measurement variable 172 created for the target primary cell measurement configuration 162 after application of the target primary cell measurement configuration 162.

[0287] Thus, in various embodiments, the source MN 152 may instruct and / or configure the UE 150 to maintain measurement information associated with and / or related to the evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162.

[0288] At block 222 , the method 200 comprises applying the target primary cell measurement configuration 162 .

[0289] For example, the UE 150 may determine that a conditional handover condition is met and apply the target primary cell measurement configuration 162.

[0290] In an embodiment, the target primary cell measurement configuration 162 is included together with the conditional reconfiguration of the target cell. By applying the target PCell measurement configuration 162, the UE 150 is / is configured to perform measurements according to the measurement objects provided in the measurement configuration.

[0291] In some embodiments, UE 150 may perform a handover to a target MN, e.g., establish a connection to target MN 154. This is illustrated in the embodiment of FIG. 2 by the double-headed arrow at block 222.

[0292] At block 224, the method 200 comprises maintaining measurement information associated with and / or related to the evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 after applying the target primary cell measurement configuration 162.

[0293] Maintaining the measurement information may be performed in any suitable manner using any suitable method.

[0294] For example, maintaining the measurement information comprises maintaining the measurement information in at least one data structure.

[0295] For example, maintaining the measurement information may comprise not resetting, and / or not deleting, and / or not removing the measurement information.

[0296] The measurement information associated with and / or related to the evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 may comprise any suitable information. For example, the measurement information may comprise any suitable information used by the UE to evaluate whether the conditions 140 for accessing the target primary cell of the secondary cell group 142 are met.

[0297] In an embodiment, the UE 150 uses the maintained measurement information for evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 after applying the target primary cell measurement configuration 162 .

[0298] Thus, in an embodiment, the method 200 comprises using measurement information maintained at and / or by the UE 150 for evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162.

[0299] In some embodiments, the method 200 comprises using the maintained measurement information at and / or by the UE 150 for evaluation of the conditions 140 for accessing a target primary cell of the secondary cell group 142 associated with the second measurement identity 166 in the target primary cell measurement configuration 162.

[0300] In some embodiments, method 200 may include multiple target SNs. Thus, in some embodiments, method 200 may determine and use multiple conditions for accessing multiple target primary cells of a secondary cell group.

[0301] For example, at least one condition may be determined for each of a plurality of target primary cells of the secondary cell group.

[0302] In an embodiment, the condition 140 for accessing a target primary cell of the secondary cell group 142 can be one condition of a plurality of such conditions.

[0303] 2 does not necessarily imply a required or preferred order for the blocks, and the order and arrangement of the blocks may be changed. Additionally, it may be possible to omit some blocks.

[0304] For example, in some embodiments, if the source MN sends at least one target primary cell measurement configuration 162 to the UE 150, blocks 212 through 216 may be omitted.

[0305] Examples of the present disclosure are advantageous and provide technical advances.

[0306] For example, an embodiment of the present disclosure provides that the UE reuses the source primary cell measurement configuration for evaluation of conditions associated with access to the target PSCell prepared by the target MN.

[0307] For example, embodiments of the present disclosure may enable a UE to evaluate conditions associated with accessing a prepared target PSCell by creating an independent UE measurement variable for each prepared target PCell measurement configuration.

[0308] In such an embodiment, the target PCell can still determine the conditions associated with accessing the prepared target PSCell.

[0309] FIG. 3 illustrates an embodiment of a method 300 .

[0310] FIG. 3 is similar to the embodiment of FIG. 2 and similarly illustrates multiple devices transmitting and / or receiving one or more signals and / or one or more messages over and / or using a network.

[0311] In an embodiment, the devices in FIG. 3 form at least a portion of the network 100 described in connection with FIG.

[0312] In an example, Figure 3 can be considered to illustrate multiple methods. For example, Figure 3 illustrates one or more actions among multiple actors / entities. In an example, Figure 3 can be considered to illustrate multiple methods performed by individual actors / entities.

[0313] In the illustrated embodiment, one or more signals and / or one or more messages are transmitted and / or received by terminal node 110 and three access nodes 120. In the example of Figure 2, terminal node 110 is UE 150, and the three access nodes 120 are source MN 152, target MN 154, and target SN 156.

[0314] In an embodiment (not illustrated in FIG. 3), UE 150 may also be connected to a source SN.

[0315] In embodiments, communication and / or transmission between the elements illustrated in FIG. 3 may proceed through any number of intervening elements, including zero intervening elements.

[0316] Although one UE 150 is illustrated in the embodiment of FIG. 3, an embodiment may include any suitable number of UEs 150.

[0317] Similarly, an embodiment may include any suitable number of network nodes.

[0318] In an embodiment, the method 300 and / or portions of the method 300 may be considered a method for enhancing conditional handover.

[0319] In an embodiment, the method 300 and / or one or more portions of the method 300 may be considered a method for enhancing conditional handover with dual connectivity.

[0320] In an embodiment, the method 300 and / or one or more portions of the method 300 can be considered a method for working with measurement variables.

[0321] In an embodiment, the method 300 and / or one or more portions of the method 300 may be considered a method for handling UE measurement information.

[0322] In the illustrated embodiment, the location of the block indicates the entity that performs the action, for example, block 308 is performed in / by target MN 154.

[0323] In block 302, the method 300 comprises establishing a connection between the UE 150 and the source MN 152. This is illustrated in the example of Figure 3 by the double-headed arrow between the UE 150 and the source MN 152.

[0324] Block 302 is the same as that described in connection with block 202 of the FIG. 2 embodiment.

[0325] At block 304 , the method 300 comprises providing the UE 150 with the source primary cell measurement configuration 148 .

[0326] Block 304 is the same as that described in connection with block 204 of the FIG. 2 embodiment.

[0327] In block 306, the method 300 comprises receiving a handover request 151 from the perspective of the target MN 154. Thus, from the perspective of the source MN 152, block 206 illustrates the transmission of the handover request 151.

[0328] Block 306 is the same as that described in connection with block 206 of the FIG. 2 embodiment.

[0329] At block 308, the method 300 includes determining a condition 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154.

[0330] Block 308 is the same as that described in connection with determining condition 140 in block 208 of the FIG. 2 embodiment.

[0331] At block 310 , the method 300 comprises generating, in the target primary cell measurement configuration 162 , a measurement identity associated with a condition 140 for accessing a target primary cell of the secondary cell group 142 .

[0332] Block 310 may be performed in any suitable manner using any suitable method.

[0333] In an embodiment, generating a measurement identity in block 310 comprises creating, selecting, choosing, and / or determining a measurement identity.

[0334] In some embodiments, generating a measurement identity in block 310 comprises selecting a measurement identity from a set of pre-defined measurement identities.

[0335] At block 312 , the method 300 comprises including the generated measurement identity and the determined conditions 140 in the target primary cell measurement configuration 162 .

[0336] Block 312 may be performed in any suitable manner using any suitable method.

[0337] In an embodiment, including the generated measurement identities and determined conditions 140 in the target primary cell measurement configuration 162 comprises inserting and / or entering and / or including data and / or information in one or more data structures.

[0338] In some embodiments, block 312 comprises associating, and / or connecting, and / or linking, and / or relating, in the target primary cell measurement configuration 162, the generated measurement identity with the conditions 140 for accessing the target primary cell of the secondary cell group 142.

[0339] In some embodiments, block 312 comprises associating the generated measurement identity with a measurement object and a reporting configuration of conditions 140 for accessing a primary cell of secondary cell group 142 .

[0340] In some embodiments, block 312 comprises including the generated measurement identity in a data structure in association with an identifier of the measurement object and an identifier of the reporting configuration of the conditions 140 for accessing the target primary cell of the secondary cell group 142.

[0341] At block 314 , the method 300 comprises, from the perspective of the target MN 154 , transmitting the target primary cell measurement configuration 162 to the source master node 152 .

[0342] The target primary cell measurement configuration 162 may be sent as part of the handover request acknowledge message.

[0343] Thus, from the perspective of the source MN 152, block 314 comprises receiving from the target master node 154 a target primary cell measurement configuration 162 including a measurement identity and conditions 140 for accessing a target primary cell of the secondary group 142 of the target secondary node 156 associated with the conditional handover to the target master node 154.

[0344] In block 316, the method 300 comprises, from the perspective of the target MN 154, transmitting an instruction 164 to maintain measurement information for evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162.

[0345] Therefore, Figure 3 receiving a handover request 151; determining a condition 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with a conditional handover to a target master node 154; generating, in the target primary cell measurement configuration 162, a measurement identity associated with a condition 140 for accessing the target primary cell of the secondary cell group 142; including the generated measurement identity and determined conditions 140 in a target primary cell measurement configuration 162; Sending a target primary cell measurement configuration 162 to the source master node 152; and sending an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group 142 after applying the target primary cell measurement configuration 162.

[0346] In the embodiment of FIG. 3, the maintaining instruction 164 is illustrated as being sent separately to the target primary cell measurement configuration 162, but in some embodiments, the maintaining instruction 164 can be sent together with the target primary cell measurement configuration 162.

[0347] For example, the instruction to maintain 164 may be sent as part of the handover request acknowledge message.

[0348] The maintaining instruction 164 may have any suitable form. For example, the maintaining instruction 164 may have any suitable form for instructing the UE 150 to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162.

[0349] In some embodiments, the indication to maintain 164 comprises a flag.

[0350] In some embodiments, the instructions 164 comprise instructions to maintain measurement information for evaluation of conditions for accessing a target primary cell of the secondary cell group 142 after execution of a conditional handover (CHO).

[0351] From the perspective of the source MN 152, block 316 comprises receiving an instruction to maintain measurement information for evaluation of the conditions 140 for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162.

[0352] At block 318, the method 300 comprises assigning a conditional handover condition to each target primary cell.

[0353] At block 320 , the method 300 comprises, from the perspective of the source MN 152 , transmitting the target primary cell measurement configuration 162 and indication 164 to the user equipment 150 .

[0354] Therefore, Figure 3 receiving, from the target master node 154, a target primary cell measurement configuration 162 including conditions 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154; receiving an instruction 164 to maintain measurement information for evaluation of conditions 140 for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration 162; and transmitting a target primary cell measurement configuration 162 and an indication 164 to the user equipment 150.

[0355] In an embodiment, the target primary cell measurement configuration 162 and indication 164 may be sent as part of an RRC reconfiguration message.

[0356] In an embodiment, the source MN 152 also transmits a source primary cell measurement configuration 148 to the UE 150 .

[0357] In an embodiment, UE 150 may perform one or more of blocks 220, 222, and 224 as described in connection with FIG.

[0358] FIG. 4 illustrates an embodiment of a method 400 .

[0359] In embodiments, method 400 may be performed by any suitable apparatus comprising any suitable means for performing method 400. For example, an apparatus such as those described in relation to Figures 12A and / or 12B.

[0360] In an embodiment, the method 400 may be performed by a source MN 152, such as the source MN 152 of FIG.

[0361] At block 402 , the method 400 comprises establishing a connection to the user equipment UE 150 via the source primary cell 174 .

[0362] At block 404 , the method 400 comprises providing the UE 150 with a source primary cell measurement configuration 148 .

[0363] At block 406, the method 400 includes determining a condition 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154.

[0364] In block 408, the method 400 includes generating a measurement identity 146 associated with a condition 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154 in the updated source primary cell measurement configuration 148a.

[0365] At block 410, the method 400 comprises including the generated measurement identity 146 and the condition 140 for accessing the target primary cell of the secondary cell group 142 in an updated source primary cell measurement configuration 148a.

[0366] At block 412 , the method 400 comprises transmitting the updated source primary cell measurement configuration 148 to the user equipment 150 .

[0367] Therefore, Figure 4 establishing a connection to a user equipment (UE) via a source primary cell; providing a source primary cell measurement configuration to a UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; Including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in the updated source primary cell measurement configuration; and transmitting an updated source primary cell measurement configuration to the user equipment.

[0368] FIG. 5 illustrates an embodiment of a method 500 .

[0369] In embodiments, method 500 may be performed by any suitable apparatus comprising any suitable means for performing method 500. For example, an apparatus such as those described in relation to Figures 12A and / or 12B.

[0370] In an embodiment, the method 500 may be performed by a target MN 154, such as the target MN 154 of FIG.

[0371] At block 502 , the method 500 comprises receiving a handover request 151 .

[0372] In block 504, the method 500 comprises transmitting information 158 enabling determination of conditions 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with a conditional handover to a target master node 154 associated with a measurement identity 146 generated by the source master node 152 in the source primary cell measurement configuration 148.

[0373] Therefore, Figure 5 receiving a handover request; and transmitting, in a source primary cell measurement configuration, information that enables determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node that is associated with a measurement identity generated by the source master node.

[0374] FIG. 6 illustrates an embodiment of a method 600 .

[0375] In an embodiment, method 600 may be performed by any suitable apparatus comprising any suitable means for performing method 500. For example, an apparatus such as those described in relation to Figures 12A and / or 12B.

[0376] In an embodiment, the method 600 may be performed by a UE 150, such as the UE 150 of FIG. 1 and / or FIG.

[0377] At block 602 , the method 600 comprises establishing a connection to the source master node 152 .

[0378] At block 604, the method 600 comprises receiving at least one measurement configuration 170 from the source master node 152 including conditions 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154.

[0379] At block 606, the method 600 comprises creating at least one measurement variable 172 for the received at least one measurement configuration 170.

[0380] Therefore, Figure 6 Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; and generating at least one measurement variable for the at least one received measurement configuration.

[0381] FIG. 7 illustrates an embodiment of a method 700 .

[0382] In an embodiment, method 700 may be performed by any suitable apparatus comprising any suitable means for performing method 500. For example, an apparatus such as those described in relation to Figures 12A and / or 12B.

[0383] In an embodiment, the method 700 may be performed by a target MN 154, such as the target MN 154 of FIG.

[0384] At block 702 , the method 700 comprises receiving a handover request 151 .

[0385] At block 704, the method 700 comprises determining a condition 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with the conditional handover to the target master node 154.

[0386] At block 706 , the method 700 comprises generating, in the target primary cell measurement configuration 162 , a measurement identity associated with a condition 140 for accessing the target primary cell of the secondary cell group 142 .

[0387] At block 708 , the method 700 comprises including the generated measurement identity and the determined conditions 140 in the target primary cell measurement configuration 162 .

[0388] At block 710 , the method 700 comprises transmitting the target primary cell measurement configuration 162 to the source master node 152 .

[0389] In block 712, the method 700 includes transmitting an instruction 164 to maintain measurement information for evaluation of conditions 140 for accessing the target primary cell of the secondary cell group 142 after applying the target primary cell measurement configuration 162.

[0390] Therefore, Figure 7 receiving a handover request; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group in the target primary cell measurement configuration; including the generated measurement identity and the determined conditions in a target primary cell measurement configuration; Sending a target primary cell measurement configuration to the source master node; and transmitting an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration.

[0391] FIG. 8 illustrates an embodiment of a method 800 .

[0392] In an embodiment, method 800 may be performed by any suitable apparatus comprising any suitable means for performing method 400. For example, an apparatus such as those described in relation to Figures 12A and / or 12B.

[0393] In an embodiment, the method 800 may be performed by a source MN 152, such as the source MN 152 of FIG.

[0394] In block 802, the method 800 comprises receiving a target primary cell measurement configuration 162 from the target master node 154, the target primary cell measurement configuration 162 including a measurement identity and conditions 140 for accessing a target primary cell of a secondary cell group 142 of a target secondary node 156 associated with a conditional handover to the target master node 154.

[0395] At block 804, the method 800 comprises receiving an instruction 164 to maintain measurement information for evaluation of conditions 140 for accessing the target primary cell of the secondary cell group 142 after application of the target primary cell measurement configuration 162.

[0396] At block 806 , the method 800 comprises transmitting the target primary cell measurement configuration 162 and the indication 164 to the user equipment 150 .

[0397] Therefore, Figure 8 receiving, from the target master node, a target primary cell measurement configuration including a measurement identity and a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with the conditional handover to the target master node; receiving an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; and transmitting a target primary cell measurement configuration and instruction to the user equipment.

[0398] FIG. 9 illustrates an embodiment of a method 900 .

[0399] Some embodiments relate to 3rd Generation Partnership Project (3GPP) networks, and Figure 9 can be seen to illustrate some such embodiments.

[0400] The following description can be considered illustrative of some such embodiments.

[0401] In FIG. 9, the UE 150 performs an evaluation of the Conditional PSCell Addition and Modification (CPAC) condition after block 13.

[0402] If the CHO condition is met first, the UE 150 applies one of the two CHO configurations 1-1 and 1-2. At this point, the UE 150 applies the measurement configuration for the target PCell that is part of the CHO configuration.

[0403] However, in an embodiment, applying a new measurement configuration may cause measurement evaluation (clearing all L1 beam measurements, L3 cell quality measurements, resetting L3 filters for cell quality measurements, etc.) to restart from the beginning.

[0404] FIG. 10 illustrates a method 1000 in which the UE 150 continues evaluating the Conditional PSCell Addition and Modification (CPAC) conditions associated with the target PSCell after CHO execution (started after step 13) using measurements performed during the CHO evaluation.

[0405] Note that the measurement target and reporting configuration for Measurement ID1 (generated by the target MN) are the same as those used for Measurement ID2 (generated by the source MN). Therefore, the measurement of the CPAC condition initiated in step 13 can be reused for the evaluation of CPAC Measurement ID2 after the CHO execution in step 15.

[0406] FIG. 11 illustrates an embodiment of a method 1100 .

[0407] Some embodiments relate to a 3rd Generation Partnership Project (3GPP) network. Figure 11 can be considered to illustrate some such embodiments relating to a 3rd Generation Partnership Project (3GPP) network.

[0408] In the example of FIG. 11, blocks 7 and 14 allow UE 150 to continue measuring CPAC conditions after the CHO conditions are met, ie, when the target MCG (measurement) configuration is executed.

[0409] The examples of the present disclosure are advantageous.

[0410] For example, a technical advantage provided by embodiments of the present disclosure is the reuse of a source PCell measurement configuration for evaluation of conditions associated with a target PSCell of a target PCell prepared for conditional handover, thereby eliminating the need to define independent UE measurement variables for each non-serving target PCell measurement configuration, for example.

[0411] For example, a technical advantage provided by embodiments of the present disclosure is that a UE can evaluate the condition of a prepared target PSCell by creating an independent UE measurement variable for each prepared target PCell measurement configuration, thereby allowing the target PCell to subsequently determine the condition of the prepared target PSCell.

[0412] 12A illustrates an example of an apparatus 130. The apparatus 130 may be a controller of an apparatus or device, such as an end node 110, e.g., a UE 150, or a network element 152, 154, and / or 156, such as an eNB or a gNB. The apparatus 130 may be considered a controller.

[0413] The implementation of controller 130 can be as controller circuitry. Controller 130 can be implemented solely in hardware, have certain aspects in software including solely in firmware, or be a combination of hardware and software (including firmware).

[0414] As illustrated in FIG. 12A, the controller 130 may be implemented using instructions that enable hardware functionality, for example, by using executable instructions of a computer program 136 in a general-purpose or special-purpose processor 132 that may be stored on a computer-readable storage medium (disk, memory, etc.) that is executed by such processor 132.

[0415] Processor 132 is configured to read from and write to memory 134. Processor 132 may also include an output interface through which data and / or commands are output by processor 132 and an input interface through which data and / or commands are input to processor 132.

[0416] The memory 134 stores a computer program 136 comprising computer program instructions (computer program code) that, when loaded into the processor 132, control the operation of the device 130. The computer program instructions of the computer program 136 provide logic and routines that enable the device to perform the methods illustrated in the accompanying drawings. The processor 132 can load and execute the computer program 136 by reading the memory 134.

[0417] In an embodiment, the device 130 comprises: at least one processor; at least one memory containing computer program code; Equipped with The at least one memory, when executed by the at least one processor, provides the device with at least: establishing a connection to a user equipment (UE) via a source primary cell; providing a source primary cell measurement configuration to a UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; Including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in the updated source primary cell measurement configuration; sending an updated source primary cell measurement configuration to the user equipment; It stores the command to

[0418] In an embodiment, the device 130 comprises: at least one processor; at least one memory containing computer program code; Equipped with The at least one memory, when executed by the at least one processor, provides the device with at least: receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; It stores the command to

[0419] In an embodiment, the device 130 comprises: at least one processor; at least one memory containing computer program code; Equipped with The at least one memory, when executed by the at least one processor, provides the device with at least: Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; creating at least one measurement variable for the at least one received measurement configuration; It stores the command to

[0420] In an embodiment, the device 130 comprises: at least one processor; at least one memory containing computer program code; Equipped with The at least one memory, when executed by the at least one processor, provides the device with at least: receiving a handover request; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group in the target primary cell measurement configuration; including the generated measurement identity and the determined conditions in a target primary cell measurement configuration; Sending a target primary cell measurement configuration to the source master node; sending an instruction to maintain measurement information for evaluating conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; It stores the command to

[0421] In an embodiment, the device 130 comprises: at least one processor; at least one memory containing computer program code; Equipped with The at least one memory, when executed by the at least one processor, provides the device with at least: receiving, from the target master node, a target primary cell measurement configuration including a measurement identity and a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with the conditional handover to the target master node; receiving an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; sending a target primary cell measurement configuration and instruction to the user equipment; It stores the command to

[0422] 12A, the computer program 136 may arrive at the device 130 via any suitable delivery mechanism 162. The delivery mechanism 162 may be, for example, a machine-readable medium, a computer-readable medium, a non-transitory computer-readable storage medium, a computer program product, a memory device, a recording medium such as a compact disc read-only memory (CD-ROM) or a digital versatile disc (DVD), or a solid-state memory, an article of manufacture that includes or tangibly embodies the computer program 136, or the like. The delivery mechanism may be a signal configured to reliably transfer the computer program 136. The device 130 may propagate or transmit the computer program 136 as a computer data signal.

[0423] at least, establishing a connection to a user equipment (UE) via a source primary cell; providing a source primary cell measurement configuration to a UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; Including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in the updated source primary cell measurement configuration; sending an updated source primary cell measurement configuration to the user equipment; computer program instructions for causing a device to execute or for execution.

[0424] at least, receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; computer program instructions for causing a device to execute or for execution.

[0425] at least, Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; creating at least one measurement variable for the at least one received measurement configuration; computer program instructions for causing a device to execute or for execution.

[0426] at least, receiving a handover request; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group in the target primary cell measurement configuration; including the generated measurement identity and the determined conditions in a target primary cell measurement configuration; Sending a target primary cell measurement configuration to the source master node; sending an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; computer program instructions for causing a device to execute or for execution.

[0427] at least, receiving, from the target master node, a target primary cell measurement configuration including a measurement identity and a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with the conditional handover to the target master node; receiving an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; sending a target primary cell measurement configuration and instruction to the user equipment; computer program instructions for causing a device to execute or for execution.

[0428] The computer program instructions may be included in a computer program, a non-transitory computer-readable medium, a computer program product, a machine-readable medium, etc. In some, but not necessarily all, embodiments, the computer program instructions may be distributed across multiple computer programs.

[0429] Although illustrated as a single component / circuitry, memory 134 may be implemented as one or more separate components / circuitry, some or all of which may be integrated / removable and / or may provide persistent / semi-persistent / dynamic / cached storage.

[0430] In an embodiment, memory 134 comprises random access memory 158 and read-only memory 160. In an embodiment, computer programs 136 may be stored in read-only memory 158. See, for example, Figure 12B.

[0431] In some embodiments, memory 134 may be divided into random access memory 158 and read-only memory 160 .

[0432] Although illustrated as a single component / circuitry, processor 132 may be implemented as one or more separate components / circuitry, some or all of which may be integrated / removable. Processor 132 may be a single-core processor or a multi-core processor.

[0433] References to "computer-readable storage medium," "computer program product," "tangibly embodied computer program," etc., or to "controller," "computer," "processor," etc., should be understood to encompass computers having different architectures, such as single / multi-processor architectures and sequential (von Neumann) / parallel architectures, as well as specialized circuitry, such as field programmable gate arrays (FPGAs), application specific circuits (ASICs), signal processing devices, and other processing circuitry. References to computer programs, instructions, code, etc., should be understood to encompass software for programmable processors or firmware, e.g., the programmable contents of a hardware device, such as instructions for a processor, or configuration settings for a fixed function device, gate array, or programmable logic device, etc.

[0434] As used herein, the term "circuitry" means (a) a hardware-only circuitry implementation (such as an implementation solely in analog and / or digital circuitry); (b) (if applicable) (i) a combination of analog and / or digital hardware circuitry with software / firmware; (ii) a combination of hardware circuitry and software, such as a portion of a hardware processor and software (including a digital signal processor), or software and memory, operating together to perform various functions for a device such as a mobile phone or server; (c) may refer to one or more or all of a hardware circuit and / or processor, such as a microprocessor or portion of a microprocessor, that requires software (e.g., firmware) for operation, which may not be present if not necessary for operation. This definition of circuitry applies to all uses of the term in this application, including any claims. As a further example, as used in this application, the term circuitry also covers merely a hardware circuit or processor and its accompanying software and / or firmware implementation. The term circuitry also covers, for example, a baseband integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing or network device, if applicable to a particular claim element.

[0435] The blocks illustrated in the accompanying figures may represent steps in a method and / or sections of code in the computer program 136. The illustration of a particular order for the blocks does not necessarily imply a required or preferred order for the blocks, and the order and arrangement of the blocks may be changed. Additionally, some blocks may be omitted.

[0436] Where a structural feature is described, it may be replaced by a means that performs one or more of the functions of that structural feature, whether that function is explicitly or implicitly described.

[0437] Thus, the device 130, in an embodiment, establishing a connection to a user equipment (UE) via a source primary cell; providing a source primary cell measurement configuration to a UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; Including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in the updated source primary cell measurement configuration; sending an updated source primary cell measurement configuration to the user equipment; The device may include means for:

[0438] Thus, the device 130, in an embodiment, receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; The device may include means for:

[0439] Thus, the device 130, in an embodiment, Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; creating at least one measurement variable for the at least one received measurement configuration; The device may include means for:

[0440] Thus, the device 130, in an embodiment, receiving a handover request; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating a measurement identity associated with a condition for accessing the target primary cell of the secondary cell group in the target primary cell measurement configuration; including the generated measurement identity and the determined conditions in a target primary cell measurement configuration; Sending a target primary cell measurement configuration to the source master node; sending an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; The device may include means for:

[0441] Thus, the device 130, in an embodiment, receiving, from the target master node, a target primary cell measurement configuration including a measurement identity and a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with the conditional handover to the target master node; receiving an instruction to maintain measurement information for evaluation of conditions for accessing the target primary cell of the secondary cell group after applying the target primary cell measurement configuration; sending a target primary cell measurement configuration and instruction to the user equipment; The device may include means for:

[0442] In an embodiment, device 130 may comprise means for performing one or more methods, or at least a portion of one or more methods, as disclosed herein.

[0443] In an embodiment, device 130 may be configured to perform one or more methods, or at least a portion of one or more methods, as disclosed herein.

[0444] The above embodiments find application in enabling components of automotive systems, communication systems, electronic systems including consumer electronic products, distributed computing systems, media systems for generating or rendering media content including audio, visual, audiovisual content, mixed reality, mediated reality, virtual reality, and / or augmented reality, personal systems including personal health or fitness systems, navigation systems, user interfaces also known as human-machine interfaces, networks including cellular networks, non-cellular networks, and optical networks, ad hoc networks, the Internet, the Internet of Things, virtualized networks, and related software and services.

[0445] According to embodiments of the present disclosure, the apparatus may be provided in an electronic device, such as a mobile terminal. However, it should be understood that a mobile terminal is merely illustrative of an electronic device that may benefit from exemplary implementations of the present disclosure and is not intended to limit the scope of the present disclosure. In certain embodiments, the apparatus may be provided in a mobile terminal, but embodiments of the present disclosure may readily be applied to other types of electronic devices, including, but not limited to, mobile communication devices, handheld electronic devices, wearable computing devices, portable digital assistants (PDAs), pagers, mobile computers, desktop computers, televisions, game consoles, laptop computers, cameras, video recorders, GPS devices, and other types of electronic systems. Furthermore, embodiments of the present disclosure may readily be applied to devices regardless of their intent to provide mobility.

[0446] The term "comprises" is used herein in an inclusive rather than exclusive sense, i.e., any reference to X comprising Y indicates that X may comprise only one Y, or may comprise multiple Ys. If the exclusive sense of "comprises" is intended, this will be clarified in the context by reference to "comprises only one..." or by use of "consisting of."

[0447] In this description, the words "connect," "couple," and "communicate" and their derivatives mean operatively connected / coupled / communicating. It should be recognized that intervening components can be present in any number or combination (including when there are no intervening components) to provide, that is, direct or indirect, connecting / coupling / communicating. Such intervening components can include hardware components and / or software components.

[0448] As used herein, the term "determine / determining" (and grammatical variations thereof) can include at least calculating, computing, processing, deriving, measuring, investigating, identifying, retrieving (e.g., looking up in a table, database, or another data structure), ascertaining, etc. "Determining" can also include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), obtaining, etc. "Determining" can also include resolving, selecting, choosing, establishing, etc.

[0449] In this description, reference is made to various embodiments. The description of a feature or function in connection with an embodiment indicates that the feature or function is present in that embodiment. The use of the terms "embodiment," "for example," "can," or "might" in this text, whether explicitly stated or not, means that such feature or function is present in at least the described embodiment, whether or not it is described as an example, and may, but is not necessarily, present in some or all of the other embodiments. Thus, "embodiment," "for example," "can," or "might" refers to a particular instance within a class of embodiments. Properties of an instance can be properties of only that instance, properties of a class, or properties of a subclass of a class that includes some but not all instances within the class. Thus, a feature described with reference to one embodiment but not with reference to another embodiment implicitly discloses that, where possible, it can be used as part of a functional combination in other embodiments, but not necessarily in other embodiments.

[0450] In the preceding paragraphs, examples have been described with reference to various embodiments, but it should be appreciated that modifications can be made to the examples given without departing from the scope of the claims.

[0451] The features set forth in the foregoing description may be used in combinations other than those expressly set forth above.

[0452] Although functions are described with reference to particular features, these functions may be performed by other features whether or not described.

[0453] Although features are described with reference to particular embodiments, these features may also be present in other embodiments whether or not described.

[0454] The terms "a," "an," or "the" herein are used in an inclusive, not exclusive sense. That is, any reference to X comprising Y indicates that X may comprise only one Y or may comprise multiple Ys, unless the context clearly indicates otherwise. Where "a," "an," or "the" is intended to be used in an exclusive sense, this will be clear from the context. In some circumstances, the use of "at least one" or "one or more" may be used to emphasize an inclusive sense, but the absence of these words does not imply an exclusive sense.

[0455] The presence of a feature (or combination of features) in a claim is a reference both to the feature or (combination of features) itself and to features that achieve substantially the same technical effect (equivalent features). Equivalent features include, for example, features that are modifications and achieve substantially the same result in substantially the same way. Equivalent features include, for example, features that perform substantially the same function in substantially the same way to achieve substantially the same result.

[0456] In this description, reference is made to various embodiments using adjectives or adjective phrases to describe characteristics of the embodiments. Such description of a characteristic associated with an embodiment indicates that the characteristic is present in some embodiments exactly as described and in other embodiments substantially as described.

[0457] While the above description describes several embodiments of the present disclosure, those skilled in the art will recognize possible alternative structures and method features that provide equivalent functionality to the specific embodiments of such structures and features described herein above, and that have been omitted from the above description for purposes of brevity and clarity. Nevertheless, the above description should be implicitly construed as including reference to alternative structures or method features that provide equivalent functionality, unless such alternative structures or method features are expressly excluded in the above description of embodiments of the present disclosure.

[0458] While the foregoing specification has attempted to draw attention to features believed to be important, it should be understood that applicant may seek protection through the claims for any patentable feature or combination of features described above and / or illustrated in the drawings, whether emphasized or not.

Claims

1. at least one processor; at least one memory containing computer program code; An apparatus comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: establishing a connection to a user equipment UE via a source primary cell; providing a source primary cell measurement configuration to the UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in an updated source primary cell measurement configuration; sending the updated source primary cell measurement configuration to the user equipment; A device that stores instructions to

2. 2. The apparatus of claim 1, wherein determining the conditions for accessing the target primary cell of the secondary cell group comprises receiving information; and determining the conditions based at least in part on the received information.

3. The apparatus of claim 2 , wherein the information is received from a target master node and comprises measurement-related information.

4. The apparatus of claim 3 , wherein the measurement-related information comprises measurement target information.

5. The device of any one of claims 2 to 4, wherein the at least one memory stores instructions that, when executed by the at least one processor, cause the device to generate at least a report configuration of the conditions for accessing the target primary cell of the secondary cell group.

6. The apparatus of any one of claims 2 to 5, wherein the conditions comprise conditional PSCell addition and modification CPAC conditions.

7. The apparatus of any one of claims 4 to 6, wherein the updated source primary cell measurement configuration comprises the generated measurement identity and the measurement object information received from the target master node.

8. The apparatus of any one of claims 5 to 7, wherein the updated source primary cell measurement configuration comprises the generated reporting configuration.

9. The apparatus of claim 1 , wherein determining the condition for accessing the target primary cell of the secondary cell group comprises receiving the condition.

10. 10. The apparatus of claim 9, wherein the at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to receive at least a report configuration of the conditions for accessing the target primary cell of the secondary cell group.

11. The apparatus of any one of claims 1 to 10, wherein the updated source primary cell measurement configuration comprises a conditional handover CHO execution condition.

12. 12. The apparatus of claim 11, wherein the updated source primary cell measurement configuration comprises a first CHO execution condition and a first condition for accessing a target primary cell of a secondary cell group associated with a first generated measurement identity, and a second CHO execution condition and a second condition for accessing a target primary cell of a secondary cell group associated with a second generated measurement identity, wherein the first condition and the second condition for accessing the target primary cell of the secondary cell group comprise a conditional PSCell addition and modification CPAC condition.

13. The at least one memory, when executed by the at least one processor, provides the device with at least: receiving an indication in a target primary cell measurement configuration indicating a second measurement identity associated with the condition for accessing the target primary cell of the secondary cell group; sending to the UE, after applying the target primary cell measurement configuration, an instruction to maintain measurement information associated with evaluation of the conditions for accessing the target primary cell of a secondary cell group associated with the second measurement identity, for evaluation of the conditions for accessing the target primary cell of a secondary cell group associated with the generated measurement identity; 13. Apparatus according to any preceding claim, storing instructions to cause:

14. The apparatus of claim 13 , wherein the indication of the second measurement identity comprises the second measurement identity.

15. establishing a connection to a user equipment UE via a source primary cell; providing a source primary cell measurement configuration to the UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with the condition for accessing the target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node; including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in an updated source primary cell measurement configuration; sending the updated source primary cell measurement configuration to the user equipment; A method comprising:

16. 16. The method of claim 15, wherein determining the conditions for accessing the target primary cell of the secondary cell group comprises receiving information and determining the conditions based at least in part on the received information.

17. The method of claim 15 , wherein determining the condition for accessing the target primary cell of the secondary cell group comprises receiving the condition.

18. receiving an indication in a target primary cell measurement configuration indicating a second measurement identity associated with the condition for accessing the target primary cell of the secondary cell group; sending to the UE, after applying the target primary cell measurement configuration, an instruction to maintain measurement information associated with evaluation of the conditions for accessing the target primary cell of a secondary cell group associated with the second measurement identity, for evaluation of the conditions for accessing the target primary cell of a secondary cell group associated with the generated measurement identity; The method of any one of claims 15 to 17, comprising:

19. For the device, at least establishing a connection to a user equipment UE via a source primary cell; providing a source primary cell measurement configuration to the UE; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating, in the updated source primary cell measurement configuration, a measurement identity associated with a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; including the generated measurement identity and the condition for accessing the target primary cell of the secondary cell group in an updated source primary cell measurement configuration; sending the updated source primary cell measurement configuration to the user equipment; A computer program comprising instructions for causing the computer to execute:

20. 20. The computer program product of claim 19, wherein determining the conditions for accessing the target primary cell of the secondary cell group comprises receiving information; and determining the conditions based at least in part on the received information.

21. The computer program product of claim 19 , wherein determining the condition for accessing the target primary cell of the secondary cell group comprises receiving the condition.

22. The computer program is configured to cause the device to perform at least the following steps: receiving an indication in a target primary cell measurement configuration indicating a second measurement identity associated with the condition for accessing the target primary cell of the secondary cell group; sending to the UE, after applying the target primary cell measurement configuration, an instruction to maintain measurement information associated with evaluation of the conditions for accessing the target primary cell of a secondary cell group associated with the second measurement identity, for evaluation of the conditions for accessing the target primary cell of a secondary cell group associated with the generated measurement identity; A computer program according to any one of claims 19 to 21, comprising instructions for causing the computer program to execute:

23. at least one processor; at least one memory containing computer program code; An apparatus comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; A device that stores instructions to

24. The at least one memory, when executed by the at least one processor, provides the device with at least: storing instructions for determining the condition for accessing a target primary cell of a secondary cell group; 24. The apparatus of claim 23, wherein transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group comprises transmitting the determined conditions.

25. 25. Apparatus according to claim 23 or 24, wherein the information comprises measurement-related information.

26. The apparatus of claim 25 , wherein the measurement-related information comprises measurement target information.

27. 27. The device of claim 23, wherein the at least one memory stores instructions that, when executed by the at least one processor, cause the device to determine at least a reporting configuration of the conditions for accessing the target primary cell of the secondary cell group, and wherein transmitting information enabling determination of conditions for accessing the target primary cell of the secondary cell group comprises transmitting the determined reporting configuration.

28. The at least one memory, when executed by the at least one processor, provides the device with at least: The device according to any one of claims 24 to 27, storing instructions for causing a target primary cell measurement configuration to transmit an indication indicating a measurement identity associated with the condition for accessing the target primary cell of a secondary cell group.

29. 30. The apparatus of claim 28, wherein the indication of the measurement identity comprises the measurement identity associated with the condition for accessing the target primary cell of a secondary cell group in a target primary cell measurement configuration.

30. receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; A method comprising:

31. determining the condition for accessing a target primary cell of a secondary cell group; 31. The method of claim 30, wherein transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group comprises transmitting the determined conditions.

32. 32. The method of claim 31, comprising transmitting an indication in a target primary cell measurement configuration indicating a measurement identity associated with the condition for accessing the target primary cell of a secondary cell group.

33. For the device, at least receiving a handover request; transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node associated with a measurement identity generated by the source master node in a source primary cell measurement configuration; A computer program comprising instructions for causing the computer to execute:

34. The computer program is configured to cause the device to perform at least the following steps: determining the condition for accessing a target primary cell of a secondary cell group; 34. The computer program product of claim 33, wherein transmitting information enabling determination of conditions for accessing a target primary cell of a secondary cell group comprises transmitting the determined conditions.

35. The computer program is configured to cause the device to perform at least the following steps:

35. The computer program product of claim 34, comprising instructions for causing a target primary cell measurement configuration to transmit an indication indicating a measurement identity associated with the condition for accessing the target primary cell of a secondary cell group.

36. at least one processor; at least one memory containing computer program code; An apparatus comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node; generating at least one measurement variable for the received at least one measurement configuration; A device that stores instructions to

37. 37. The apparatus of claim 36, wherein the at least one measurement configuration is a source primary cell measurement configuration.

38. 38. The apparatus of claim 37, wherein creating at least one measurement variable for the received at least one measurement configuration comprises updating at least one measurement variable associated with a source primary cell to include a measurement identity associated with the condition for accessing a target primary cell of a secondary cell group.

39. The at least one memory, when executed by the at least one processor, provides the device with at least:

39. The apparatus of claim 38, further comprising: storing instructions to receive instructions to maintain measurement information associated with the conditions for accessing the target primary cell of a secondary cell group associated with a second measurement identity in the target primary cell measurement configuration after application of the target primary cell measurement configuration, for evaluation of the conditions for accessing the target primary cell of a secondary cell group associated with the measurement identity.

40. 40. The apparatus of claim 39, wherein the indication comprises the second measurement identity.

41. 41. The apparatus of claim 39 or 40, wherein the at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to use the maintained measurement information at least for evaluation of the conditions for accessing the target primary cell of a secondary cell group associated with the second measurement identity in the target primary cell measurement configuration.

42. 37. The apparatus of claim 36, wherein the at least one measurement configuration comprises a target primary cell measurement configuration.

43. 43. The apparatus of claim 42, wherein creating the at least one measurement variable comprises creating at least one independent measurement variable for the target primary cell measurement configuration.

44. The at least one memory, when executed by the at least one processor, provides the device with at least:

44. The apparatus of claim 42 or 43, storing instructions to receive instructions to maintain measurement information for evaluation of the condition for accessing a target primary cell of a secondary cell group after application of the target primary cell measurement configuration.

45. 45. The apparatus of claim 44, wherein the indication comprises a flag.

46. 46. ​​The apparatus of claim 44 or 45, wherein the at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to use the maintained measurement information for at least evaluation of the condition for accessing the target primary cell of a secondary cell group after application of the target primary cell measurement configuration.

47. Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node; generating at least one measurement variable for the received at least one measurement configuration; A method comprising:

48. 48. The method of claim 47, wherein the at least one measurement configuration is a source primary cell measurement configuration.

49. 49. The method of claim 48, wherein creating at least one measurement variable for the received at least one measurement configuration comprises updating at least one measurement variable associated with a source primary cell to include a measurement identity associated with the condition for accessing a target primary cell of a secondary cell group.

50. 50. The method of claim 49, comprising receiving, after application of a target primary cell measurement configuration, an instruction to maintain measurement information associated with the condition for accessing the target primary cell of a secondary cell group associated with a second measurement identity in the target primary cell measurement configuration for evaluation of the condition for accessing the target primary cell of a secondary cell group associated with the measurement identity.

51. 51. The method of claim 50, wherein the indication comprises the second measurement identity.

52. 48. The method of claim 47, wherein the at least one measurement configuration comprises a target primary cell measurement configuration.

53. 53. The method of claim 52, wherein creating the at least one measurement variable comprises creating at least one independent measurement variable for the target primary cell measurement configuration.

54. 54. The method of claim 52 or 53, comprising receiving an instruction to maintain measurement information for evaluation of the condition for accessing a target primary cell of a secondary cell group after applying the target primary cell measurement configuration.

55. 55. The method of claim 54, wherein the indication comprises an indication indicating a measurement identity associated with the condition for accessing a target primary cell of a secondary cell group in the target primary cell measurement configuration.

56. For the device, at least Establishing a connection to a source master node; receiving, from the source master node, at least one measurement configuration including a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to a target master node; generating at least one measurement variable for the received at least one measurement configuration; A computer program comprising instructions for causing the computer to execute:

57. 57. The computer program product of claim 56, wherein the at least one measurement configuration is a source primary cell measurement configuration.

58. 58. The computer program product of claim 57, wherein creating at least one measurement variable for the received at least one measurement configuration comprises updating at least one measurement variable associated with a source primary cell to include a measurement identity associated with the condition for accessing a target primary cell of a secondary cell group.

59. The computer program is configured to cause the device to perform at least the following steps:

59. The computer program product of claim 58, comprising instructions for executing: receiving, after application of a target primary cell measurement configuration, instructions to maintain measurement information associated with the condition for accessing the target primary cell of a secondary cell group associated with a second measurement identity in the target primary cell measurement configuration for evaluation of the condition for accessing the target primary cell of a secondary cell group associated with the measurement identity.

60. 60. The computer program of claim 59, wherein the instructions comprise the second measurement identity.

61. 57. The computer program product of claim 56, wherein the at least one measurement configuration comprises a target primary cell measurement configuration.

62. 62. The computer program product of claim 61, wherein creating the at least one measurement variable comprises creating at least one independent measurement variable for the target primary cell measurement configuration.

63. The computer program is configured to cause the device to perform at least the following steps:

63. The computer program product of claim 61 or 62, comprising instructions for causing the computer program product to perform receiving an instruction to maintain measurement information for evaluation of the condition for accessing a target primary cell of a secondary cell group after application of the target primary cell measurement configuration.

64. 64. The computer program product of claim 63, wherein the instructions comprise instructions indicating a measurement identity associated with the condition for accessing a target primary cell of a secondary cell group in the target primary cell measurement configuration.

65. at least one processor; at least one memory containing computer program code; An apparatus comprising: The at least one memory, when executed by the at least one processor, provides the device with at least: receiving a handover request; determining a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to the target master node; generating a measurement identity associated with the condition for accessing a target primary cell of a secondary cell group in a target primary cell measurement configuration; including the generated measurement identity and the determined conditions in a target primary cell measurement configuration; sending the target primary cell measurement configuration to a source master node; sending an instruction to maintain measurement information for evaluation of the condition for accessing the target primary cell of a secondary cell group after applying the target primary cell measurement configuration; A device that stores instructions for executing

66. 66. The apparatus of claim 65, wherein the indication comprises a flag.

67. 67. The apparatus of claim 65 or 66, wherein the instructions comprise instructions to maintain measurement information for evaluation of the condition for accessing a target primary cell of a secondary cell group after a conditional handover (CHO) is performed.

68. at least one processor; at least one memory containing computer program code, The at least one memory, when executed by the at least one processor, provides the device with at least: receiving, from a target master node, a target primary cell measurement configuration including a measurement identity and a condition for accessing a target primary cell of a secondary cell group of a target secondary node associated with a conditional handover to said target master node; receiving an instruction to maintain measurement information for evaluation of the condition for accessing the target primary cell of a secondary cell group after applying the target primary cell measurement configuration; transmitting the target primary cell measurement configuration and instruction to a user equipment.

69. 69. The apparatus of claim 68, wherein the indication comprises a flag.

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