Conditional access

Abstract

A user equipment comprises means for sending information indicating that a target secondary node is accessed conditionally since the user equipment is configured to access conditionally, and before a secondary radio link failure occurs, the target secondary node is not accessed conditionally. Whether at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been sent by the user equipment, the at least one target primary cell is a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access a target secondary node.

Description

Technical Field

[0001] Examples of the present disclosure relate to conditional access. Some examples relate to conditional access to a target secondary node. Background Art

[0002] A wireless network includes a plurality of network nodes, which include terminal nodes and access nodes. Communication between the terminal nodes and the access nodes is wireless.

[0003] In some cases, it may be desirable to improve or enhance the conditional access by a terminal node to a target secondary node. Summary of the Invention

[0004] According to various but not necessarily all embodiments, an apparatus is provided, including components for the following operations:

[0005] Transmit information indicating whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurred, at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been transmitted by the user equipment, where the at least one target primary cell is a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node.

[0006] In some examples, the user equipment includes components for the following operations:

[0007] Determine that the secondary radio link failure has occurred when the user equipment is configured to conditionally access the target secondary node;

[0008] Determine at least one detectable target primary cell in the secondary cell group of the target secondary node and the associated radio signal measurement at the time of the secondary radio link failure; and

[0009] Determine whether at least one measurement report for the at least one detectable target primary cell in the secondary cell group has been transmitted since the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

[0010] In some examples, determining the at least one detectable target primary cell of the secondary cell group includes: determining N target primary cells in the secondary cell group having the strongest radio signal measurement at the time of the secondary radio link failure, where N is a positive integer.

[0011] In some examples, transmitting the information includes transmitting at least one SCG failure information message.

[0012] According to various but not necessarily all embodiments, a method is provided, including:

[0013] Transmit information from a user equipment, the information being used to indicate whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurs, at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been transmitted by the user equipment, the at least one target primary cell being a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node.

[0014] In some instances, the method includes:

[0015] Determine that the secondary radio link failure has occurred when the user equipment is configured to conditionally access the target secondary node;

[0016] Determine at least one detectable target primary cell in the secondary cell group of the target secondary node and the associated radio signal measurement at the time of the secondary radio link failure; and

[0017] Determine whether at least one measurement report for at least one detectable target primary cell in the secondary cell group has been sent since the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurs.

[0018] In some examples, determining at least one detectable target primary cell in the secondary cell group includes: determining N target primary cells in the secondary cell group having the strongest radio signal measurement at the time of the secondary radio link failure, where N is a positive integer.

[0019] In some examples, transmitting the information includes transmitting at least one SCG failure information message.

[0020] According to various but not necessarily all embodiments, a computer program is provided, including instructions for causing a device to at least perform the following operations:

[0021] Transmit information from a user equipment, the information indicating whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurs, at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been transmitted by the user equipment, the at least one target primary cell being a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node.

[0022] In some examples, the computer program includes instructions for causing the apparatus to at least perform the following operations:

[0023] Determine that the secondary radio link failure has occurred when the user equipment is configured to conditionally access the target secondary node;

[0024] Determine at least one detectable target primary cell in the secondary cell group of the target secondary node and the associated radio signal measurement values at the time of the secondary radio link failure; and

[0025] Determine whether at least one measurement report for the at least one detectable target primary cell in the secondary cell group has been sent since the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

[0026] In some examples, determining the at least one detectable target primary cell in the secondary cell group includes: determining N target primary cells in the secondary cell group having the strongest radio signal measurements at the time of the secondary radio link failure, where N is a positive integer.

[0027] In some examples, sending the information includes sending at least one SCG failure information message.

[0028] According to various but not necessarily all embodiments, an apparatus is provided that includes components for the following operations:

[0029] Receive information indicating whether, since the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred, at least one measurement report for at least one target primary cell in the secondary cell group of the target secondary node has been sent by the user equipment, where the at least one target primary cell is a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node; and

[0030] At least partially based on the received information, adjust at least one parameter configured to control a measurement event at the user equipment that triggers preparation for conditional access by the user equipment to at least one target primary cell in the secondary cell group of the target secondary node.

[0031] In some examples, the apparatus includes components for the following operations:

[0032] Send information to configure the user equipment with the adjusted at least one parameter.

[0033] In some examples, transmitting the information includes transmitting at least one RRC reconfiguration message.

[0034] In some examples, receiving the information includes receiving information indicating N target primary cells in a secondary cell group of the target secondary node that have the strongest radio signal measurements at the time of a secondary radio link failure, where N is a positive integer.

[0035] In some examples, receiving the information includes receiving at least one SCG failure information message.

[0036] In some examples, the apparatus includes components for:

[0037] Determining, at least in part based on the received information, that the user equipment has transmitted at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node that is detectable by the user equipment at the time of the secondary radio link failure at the user equipment, and that the at least one target primary cell in the secondary cell group has not been prepared by the target secondary node for conditional access by the user equipment;

[0038] Wherein, adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

[0039] In some examples, the apparatus includes components for performing the following operations:

[0040] Determining, at least in part based on the received information, that the user equipment has not transmitted the at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node that is detectable by the user equipment at the time of a secondary radio link failure at the user equipment;

[0041] Wherein, adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

[0042] According to various but not necessarily all embodiments, a method is provided that includes:

[0043] Receiving information indicating whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurred, the user equipment has transmitted at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node, where the at least one target primary cell is a target primary cell that is detectable by the user equipment at the time of the secondary radio link failure when the user equipment is configured to conditionally access the target secondary node; and

[0044] At least partially based on the received information, adjust at least one parameter configured to control a measurement event at a user equipment, the measurement event triggering preparation of at least one target primary cell in a secondary cell group of the target secondary node for conditional access by the user equipment.

[0045] In some examples, the method includes:

[0046] Send information to configure the user equipment with the adjusted at least one parameter.

[0047] In some examples, sending the information includes sending at least one RRC reconfiguration message.

[0048] In some examples, receiving the information includes receiving information indicating N target primary cells in a secondary cell group of a target secondary node that have the strongest radio signal measurement at the time of secondary radio link failure at the user equipment, where N is a positive integer.

[0049] In some examples, receiving the information includes receiving at least one SCG failure information message.

[0050] In some examples, the method includes:

[0051] At least partially based on the received information, determine that the user equipment has sent at least one measurement report for at least one target primary cell in a secondary cell group of a target secondary node that is detectable by the user equipment at the time of secondary radio link failure at the user equipment, and that the at least one target primary cell in the secondary cell group has not been prepared by the target secondary node for conditional access by the user equipment;

[0052] wherein adjusting the at least one parameter includes adjusting the at least one parameter at least partially based on the determination.

[0053] In some examples, the method includes:

[0054] At least partially based on the received information, determine that the user equipment has not sent at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node that is detectable by the user equipment at the time of secondary radio link failure at the user equipment;

[0055] wherein adjusting the at least one parameter includes adjusting the at least one parameter at least partially based on the determination.

[0056] According to various but not necessarily all embodiments, there is provided a computer program including instructions for causing a device to at least perform the following operations:

[0057] Receive information indicating whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurred, at least one measurement report has been sent by the user equipment for at least one target primary cell in a secondary cell group of the target secondary node, where the at least one target primary cell is a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node; and

[0058] Adjust at least one parameter configured to control a measurement event at the user equipment, where the measurement event triggers the preparation of at least one target primary cell in a secondary cell group of the target secondary node for conditional access by the user equipment, at least in part based on the received information.

[0059] In some examples, a computer program includes instructions for causing a device to at least perform the following operations:

[0060] Send information to configure the user equipment with the adjusted at least one parameter.

[0061] In some examples, sending the information includes sending at least one RRC reconfiguration message.

[0062] In some examples, receiving the information includes receiving information indicating N target primary cells in a secondary cell group of the target secondary node having the strongest radio signal measurements at the time of the secondary radio link failure, where N is a positive integer.

[0063] In some examples, receiving the information includes receiving at least one SCG failure information message.

[0064] In some examples, a computer program includes instructions for causing a device to at least perform the following operations:

[0065] Determine that the user equipment has sent at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node that is detectable by the user equipment when the secondary radio link failure occurs at the user equipment, and that the at least one target primary cell in the secondary cell group has not been prepared by the target secondary node for conditional access by the user equipment, at least in part based on the received information;

[0066] where adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

[0067] In some examples, the computer program includes instructions for causing a device to at least perform the following operations:

[0068] Determine that the user equipment has not sent at least one measurement report for at least one target primary cell that can be detected by the user equipment when a secondary radio link failure occurs in the user equipment in the secondary cell group of the target secondary node, at least in part based on the received information:

[0069] Wherein adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

[0070] According to various but not necessarily all embodiments, an apparatus is provided, comprising:

[0071] At least one processor; and

[0072] At least one memory storing 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.

[0073] According to various but not necessarily all embodiments, an apparatus is provided that includes components for performing at least a portion of one or more methods disclosed herein.

[0074] According to various but not necessarily all embodiments, examples as claimed in the appended claims are provided.

[0075] Although the above examples and optional features of the present disclosure are described separately, it should be understood that the present disclosure encompasses all possible combinations and permutations. It should be understood that various examples of the present disclosure may include any or all of the features described with respect to other examples of the present disclosure, and vice versa. Moreover, it should be understood that any one or more or all of the features in any combination can be implemented / included in / carried out by a device, method, and / or computer program instructions as needed and appropriately.

[0076] The description of a function should also be considered to disclose any component suitable for performing that function. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] Some examples will now be described with reference to the drawings, wherein:

[0078] Figure 1 Examples of the subject matter described herein are shown;

[0079] Figure 2 Another example of the subject matter described herein is shown;

[0080] Figure 3A Another example of the subject matter described herein is shown;

[0081] Figure 3B Another example of the subject matter described herein is shown;

[0082] Figure 4 Shows another example of the subject matter described herein;

[0083] Figure 5 Shows another example of the subject matter described herein;

[0084] Figure 6 A shows another example of the subject matter described herein;

[0085] Figure 7A Shows another example of the subject matter described herein; and

[0086] Figure 7B Shows another example of the subject matter described herein.

[0087] The drawings are not necessarily to scale. For clarity and conciseness, certain features and views of the drawings may be shown schematically or enlarged in scale. For example, the sizes of some elements in the figures may be enlarged relative to other elements to aid in the illustration. Like reference numerals are used in the drawings to represent like features. For clarity, it is not necessary to show all reference numerals in all of the drawings.

[0088] Definition

[0089] Master Node (MN) : A network node that provides control plane connectivity towards the core network.

[0090] Master Cell Group (MCG) : A cell group associated with the MN, including the PCell and (one or more) SCell.

[0091] Secondary Node (SN) : A network node that provides additional radio resources rather than the MN.

[0092] Secondary Cell Group (SCG) : A cell group associated with the SN, including the PSCell and (one or more) SCell.

[0093] PCell : A cell for the uplink / downlink connection to the MN. A cell of the MCG for initiating the initial access to the MN.

[0094] PSCell : A cell for the uplink / downlink connection to the SN. A cell of the SCG for initiating the initial access to the SN.

[0095] Conditional Handover (CHO):- A handover process triggered by the UE only when (one or more) configured execution conditions are met for the prepared candidate cells. The (one or more) conditions are preconfigured by the network. In 3GPP, the conditional handover execution conditions are specified by the CondExecutionCond within the CondReconfigurationToAddModList information element within the CondReconfiguration information element within the RRCReconConfiguration message.

[0096] Dual Connectivity (DC) :

[0097] The UE is connected to the MN and SN simultaneously. This is the operating mode of the UE in RRC_CONNECTED, which is configured with a primary cell group and a secondary cell group.

[0098] Configuration Information:

[0099] Information for configuring the operation of the UE. In 3GPP, the configuration information can be provided, for example, in the RRCReConfiguration message.

[0100] The term "configuration information includes" an entity (e.g., the handover execution condition for the primary cell; the SN addition condition for dual connectivity with the primary cell, etc.) can mean that the configuration information includes the information sufficient to obtain that entity. It may or may not include all the parameters of the entity. It may alternatively include a pointer to the entity or the parameters of the entity, or it may mean that the configuration includes the entity.

[0101] In 3GPP, the RRCReconConfiguration message specifies the ConditionalReconfiguration information element, which sets additional conditions for DC. The ConditionalReconfiguration information element includes the CondReconfigToAddModList information element. The CondReconfigToAddModList information element includes CondExecutionCond and CondRRCReconfig. The (one or more) additional conditions for the primary secondary cell (PSCell) are specified by CondExecutionCond. The RRCReconfig message to be applied when the specified conditions are met is set by CondRRCReconfig.

[0102] Measurement Configuration

[0103] Configuration information for configuring a UE to perform one or more measurements. In 3GPP, measurement configuration can be provided, for example, in an RRCReConfiguration message. The term "[entity] measurement configuration" (e.g., source primary cell measurement configuration) can mean a measurement configuration prepared by an entity.

[0104] It can include one or more measurement objects and one or more reporting configurations associated by one or more measurement identities.

[0105] It can include a MeasConfig information element as defined in TS 38.331. Detailed implementation

[0106] Figure 1 An example of a network 100 including multiple network nodes is shown, where the network nodes include a terminal node 110, an access node 120, and one or more core nodes 129. The terminal node 110 and the access node 120 communicate with each other. The one or more core nodes 129 communicate with the access node 120.

[0107] In this example, the network 100 is a radio telecommunications network, where at least some of the terminal node 110 and the access node 120 use the transmission / reception of radio waves / signals to communicate with each other.

[0108] In some examples, the one or more core nodes 129 can communicate with each other. In some examples, the one or more access nodes 120 can communicate with each other.

[0109] The network 100 can be a cellular network including multiple cells 122, each served by an access node 120. In this example, the interface between the terminal node 110 and the access node 120 defining the cell 122 is a wireless interface 124.

[0110] The access node 120 is a cellular radio transceiver. The terminal node 110 is a cellular radio transceiver.

[0111] In the shown example, the cellular network 100 is a 3rd Generation Partnership Project (3GPP) network, where the terminal node 110 is a user equipment (UE) and the access node 120 is a base station.

[0112] In the example, the network 100 is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN). E-UTRAN includes E-UTRAN Node B (eNB) 120, which provides E-UTRA user plane and control plane (RRC) protocol termination towards the UE 110. The eNBs 120 are interconnected with each other through an X2 interface 126. The eNBs are also connected to a Mobility Management Entity (MME) 129 through an S1 interface 128.

[0113] In other examples, network 100 is a Next Generation (or New Radio NR) Radio Access Network (NG-RAN). The NG-RAN includes gNodeB (gNB) 120, which provides user plane and control plane (RRC) protocol termination towards UE 110. gNBs 120 are interconnected with each other via the Xn interface 126. The gNBs are also connected to the Access and Mobility Management Function (AMF) via the N2 interface 128.

[0114] In an example, network 100 may include a combination of E-UTRAN and NG-RAN.

[0115] The user equipment may include a mobile device. A reference to the user equipment includes and, where possible, encompasses a reference to the mobile device.

[0116] UE 168 may perform a handover procedure to change the serving cell of UE 168. In an example, the handover procedure may be a conditional handover procedure.

[0117] The Conditional Handover (CHO) procedure may be considered a handover triggered by UE 168 when one or more handover execution conditions are met. The handover execution conditions may be pre-configured by network 100.

[0118] In an example, dual connectivity (DC) may be used to provide additional radio resources to UE 168.

[0119] In DC, the set of configurations for the serving cell of UE 168 has two subsets: the Master Cell Group (MCG) that includes the serving cell of the Master Node (MN) 172, and the Secondary Cell Group (SCG) that includes the serving cell of the Secondary Node (SN) 170.

[0120] In an example, a change of the primary cell of the Secondary Cell Group (SCG) may be configured. UE 168 may be configured with (one or more) execution conditions for performing an SN change to one or more target SNs 166. Thus, UE 168 may be configured to conditionally access one or more target SNs 166.

[0121] In an example, an initiating node, such as the source master node 172 or the source secondary node 170, may be configured to efficiently and / or intelligently determine at least one parameter that is configured to control and / or participate in controlling a measurement event at the user equipment 168, the measurement event triggering that at least one target Primary Serving Cell (PSCell) in the secondary cell group of the target secondary node 166 is prepared for conditional access by the user equipment 168.

[0122] Figure 2 An example of method 200 is shown.

[0123] In an example, Figure 2 it can be considered to illustrate various methods. For example, Figure 2 it shows one or more actions at multiple actors / entities. In an example, Figure 2 it can be considered to illustrate multiple methods performed by the actors / entities.

[0124] Regarding Figure 2 one or more of the features discussed can be found in one or more other figures.

[0125] In Figure 2 the example of, multiple devices send and / or receive one or more signals and / or one or more messages over and / or via and / or using a network. In an example, any suitable form of communication in any suitable network can be used. For example, at least a portion of Figure 1 network 100 of

[0126] Thus, in an example, Figure 2 the multiple devices in form at least a portion of network 100 as described regarding Figure 1 .

[0127] In the illustrated example, the terminal node 110 and three access nodes 120 send and / or receive one or more signals and / or one or more messages. In Figure 2 the example of, the terminal node 110 is the UE 168, and the three access nodes 120 are the source MN 172, the source SN 172, and the target SN 166.

[0128] In Figure 2 the example of, the UE 168 has dual connectivity with the source MN 172 and the source SN 170. However, in some examples, the UE 168 does not have dual connectivity.

[0129] In Figure 2 the example of, the UE 168 is configured to access the target SN 166 conditionally.

[0130] The UE 168 can be configured to access the target secondary node 166 conditionally in any suitable manner using any suitable method. For example, the UE 168 can receive any suitable configuration information to configure the UE168 to access the target SN 166 when at least one criterion is met.

[0131] In an example, the UE 168 is configured with at least one CPAC configuration. For example, the UE 168 can be configured with at least one CPC or CPA configuration

[0132] In an example, accessing a PSCell or any other suitable cell includes performing a random access procedure with the cell.

[0133] In an example, accessing a PSCell or any other suitable cell includes establishing a connection with the cell.

[0134] In an example, Figure 2 Communication and / or transmission between the elements shown in may be performed via any number of intermediate elements, including no intermediate elements.

[0135] In an example, Figure 2 Communication and / or transmission between the shown elements may be performed via any number of intermediate elements, including without any intermediate elements.

[0136] Although only one UE 168 is shown in the example of Figure 2 any suitable number of UE 168s may be included in the example.

[0137] Similarly, any suitable number of network nodes may be included in the example.

[0138] In an example, method 200 and / or at least a part of method 200 may be considered a method for enhancing conditional access to a target SN.

[0139] In an example, method 200 and / or at least a part of method 200 may be considered a method for enhancing or improving measurement reporting performed by a UE.

[0140] In an example, method 200 and / or at least a part of method 200 may be considered a method for enhancing or improving determining parameters for configuring a UE to conditionally access a target SN.

[0141] In the shown example, the position of a block indicates the entity performing the action. For example, block 202 is performed in / by UE 168.

[0142] In an example, method 200 is part of a method for configuring, and / or allowing, and / or enabling a UE 168 to conditionally access at least one target SN 166. In some examples, method 200 is part of a conditional PSCell addition and change (CPAC) method / procedure / process. For example, method 200 may be part of a conditional PSCell change (CPC) method / procedure / process or a conditional PSCell addition (CPA) method / process.

[0143] In some examples, method 200 may be considered to be SN-initiated. That is, in some examples, method 200 may be initiated by source SN 170 and / or involve source SN 170. For example, method 200 may be part of an SN-initiated CPAC method / process / procedure.

[0144] In the example shown, method 200 is SN-initiated, block 208 is performed by source SN, and block 208 involves source SN 170.

[0145] In some examples, method 200 may be considered to be MN-initiated. That is, in some examples, method 200 may be initiated by source MN 172 and / or without the participation of source SN 170. For example, method 200 may be part of an MN-initiated CPAC method / process / procedure.

[0146] In such an example, block 210 is performed at / by source MN 172, and block 208 does not involve source SN 170.

[0147] At block 202, method 200 includes: determining that a secondary radio link failure (S-RLF) has occurred when UE 168 is configured to conditionally access target SN 166.

[0148] Determining that an S-RLF has occurred can be performed in any suitable way using any suitable method.

[0149] The S-RLF can be any type of S-RLF triggered by any suitable reason. For example, the S-RLF may occur when connecting to source SN 170, or during a random access procedure for the target PSCell, etc.

[0150] In an example, UE 168 may be considered to be configured to conditionally access target SN 166 when UE 168 has received and / or applied configuration information to be configured to access target secondary node 166 when at least one criterion is met.

[0151] In an example, UE 168 may be considered to be configured to conditionally access target SN 166 when UE 168 is configured with at least one CPAC configuration, such as when UE 168 is configured with at least one CPC or CPA configuration.

[0152] As an example, refer to the example of FIG. 3.

[0153] Figure 3A An example scenario is shown. In the example of FIG. 3, UE 168 is within the coverage area of source PSCell 188 and is being served by it.

[0154] In the example shown, UE 168 moves along trajectory 196, and as UE 168 moves along trajectory 196, the UE detects two PSCells, PSCell1 190 and PSCell2 192.

[0155] Figure 3B Illustrates the reference signal received power (RSRP) variations of the source PSCell 188, PSCell1 190, and PSCell2 192 when UE 168 moves along Figure 3A the trajectory 196 as shown in the example.

[0156] Regarding Figure 3B the graph shown in the example, at time t1, PSCell1 190 reaches a measurable signal strength that meets the RSRP offset 194 configured at UE 168, and triggers the preparation of PSCell1 190 as a candidate cell for conditional access by UE 168, such as CPC.

[0157] At time t2, PSCell2 192 also meets the RSRP offset 194 preparation criteria configured in UE 168, and a measurement event report is sent from UE 168 to the source PSCell 188, which in turn triggers, for example, an SgNB (conditional) change required message to the MN, and an SgNB (conditional) addition request message from the MN to the target SN, which includes the measurement results of the target PSCell1 190 and PSCell2 192.

[0158] In the example shown, the target SN may decide on the preparation of the target PSCell1 190 because the target PSCell1 190 has the best received measurement.

[0159] However, in Figure 3B the example, at time t3, UE 168 experiences a secondary radio link failure on the current serving PSCell and sends S-RLF failure information to the MN.

[0160] In the illustrated example, the target SN misses the preparation of the target PSCell2 192, which results in an S-RLF in the source PSCell 188 because the conditional access execution criteria for the prepared PSCell1 190 are not met.

[0161] Figure 3A and Figure 3B can be considered to illustrate the S-RLF and the situation of the S-RLF experienced by UE 168.

[0162] In the example of Figure 3, when the measurement does not reflect the actual radio conditions at the time of conditional access execution, the preparation of the target PSCs 190, 192 is premature. Thus, in the example of Figure 3, if the parameters that control the measurement event that triggers the preparation of the target PSC at the UE have been adjusted or changed, S-RLF could have been avoided.

[0163] Returning to Figure 2 the example of, at block 204, method 200 includes determining at least one detectable target PSC 228 of a target secondary node (SN) 166, and an associated radio signal measurement at S-RLF. The radio signal measurement can include a radio signal power measurement.

[0164] Determining at least one detectable target PSC 228 of target SN 166 and the associated radio signal measurement at S-RLF can be performed in any suitable manner using any suitable method.

[0165] In the example, the detectable target PSC 228 is the target PSC 228 from which UE 168 can receive at least one signal.

[0166] In the example, the detectable target PSC 228 is the target PSC 228 for which UE 168 can determine at least one radio signal measurement.

[0167] In the example, the detectable target PSC 228 is the target PSC from which UE 168 is able to receive at least one signal having a received signal power greater than or equal to a value. Any suitable value can be used.

[0168] In some examples, the detectable target PSC 228 is the target PSC from which UE 168 is able to receive at least one signal having a received signal power greater than or equal to -156 dBm.

[0169] The detectable target PSC 228 can be regarded as a measurable target PSC, and / or an identifiable target PSC, and / or an observable target PSC, and / or a distinguishable target PSC, and / or a perceivable target PSC, etc.

[0170] The detectable target PSC 228 can be considered as the target PSC that can be detected by UE 168 at S-RLF.

[0171] The radio signal measurement 230 may include one or more any suitable measurements. For example, the radio signal measurement 230 may include one or more any suitable measurements indicating the radio power of at least one signal received from the target SN 166 and / or received from and / or associated with the target PSCell.

[0172] In an example, the radio signal measurement 230 includes at least one received signal received power (RSRP), and / or at least one reference signal received quality (RSRQ), and / or at least one signal-to-interference plus noise ratio (SINR) measurement.

[0173] In an example, the radio signal measurement 230 may be considered associated with the target PSCell of the target SN 166 because the radio signal measurement 230 is performed on and / or related to at least one signal received from the target PSCell of the target secondary node 166.

[0174] In an example, the radio signal measurement 230 may be considered associated with the target PSCell of the target SN 166 because the radio signal measurement indicates the power of at least one radio signal received from the target PSCell of the target SN 166.

[0175] In an example, at S-RLF includes the time period before, and / or after, and / or before and after the occurrence of S-RLF. Thus, in an example, at S-RLF includes the time period before the occurrence of S-RLF and / or the time period after the occurrence of S-RF.

[0176] Any suitable time period before and / or after the occurrence of S-RLF can be used. For example, any appropriate time period that can provide sufficient information about at least one detectable target PSCell 228 of the target SN 166 and the associated radio signal measurement.

[0177] For example, a time period in the range of 1 second to 30 minutes can be used.

[0178] For example, a time period in the range of 30 seconds to 20 minutes can be used.

[0179] For example, a time period in the range of 1 minute to 15 minutes can be used.

[0180] For example, a time period in the range of 5 minutes to 10 minutes can be used.

[0181] In an example, the time period may be at least Z microseconds, where Z is a positive integer.

[0182] In an instance, the time period may be at least Y milliseconds, where Y is a positive integer.

[0183] In an example, the time period can be at least X minutes, where X is a positive integer.

[0184] Thus, in an example, block 204 can be regarded as including: determining at least one detectable target PSCell 228 of target SN 166 and associated radio signal measurements in a time period including the S-RLF occurrence time.

[0185] In an example, block 204 includes determining at least one target PSCell from which UE 168 can receive at least one signal, and determining at least one radio signal measurement for each PSCell of the at least one target PSCell.

[0186] For example, in the example of FIG. 3, UE 168 can determine that target PSCell 1190 and target PSCell 2192 are detectable at S-RLF, and can determine the associated radio signal measurements 230 for PSCell 1 190 and PSCell 2 192 at S-RLF.

[0187] In some examples, determining at least one detectable target PSCell 228 includes: determining N target PSCs having the strongest radio signal measurements at S-RLF, where N is a positive integer.

[0188] N can be any suitable positive integer. For example, N can be in the range of 1 to 64.

[0189] For example, in the example of FIG. 3, if N is equal to 1, UE 168 will determine PSCell 2 192 because PSCell 2 192 has the strongest radio signal measurement(s) at S-RLF.

[0190] In block 206, method 200 includes determining whether at least one measurement report 226 for at least one detectable target PSCell 228 has been sent since UE 168 was configured to conditionally access target SN 166 until before the S-RLF occurs.

[0191] In an example, block 206 includes determining whether at least one measurement report 226 for at least one detectable target PSCell 228 has been reported to the network, such as a network node (e.g., source MN 172 or source SN 170), since UE 168 was configured to conditionally access target SN 166 until before the S-RLF occurs.

[0192] In an example, block 206 includes determining whether, since the UE 168 was configured to conditionally access the target SN 166, at least one measurement report 226 for at least one detectable target PSCell 228 has been sent to the network (e.g., the source MN 172 or the source SN 170) before the S-RLF occurs.

[0193] Block 206 can be performed in any suitable way using any suitable method.

[0194] In an example, at block 206, the UE 168 determines, based on the recorded / stored information, whether the UE 168 has sent / reported at least one measurement report 226 for at least one detectable target PSCell 228 during the period between when the UE 168 was configured to conditionally access the target SN 166 and the S-RLF occurs.

[0195] For example, the UE 168 can determine, based on the recorded / stored information, whether the UE 168 has sent / reported at least one measurement report 226 for at least one detectable target PSCell 228 during the period between when the UE 168 was configured to conditionally access the target SN 166 and the S-RLF occurs.

[0196] For example, in the example of Figure 3, the UE 168 will determine whether the UE 168 has reported / sent at least one measurement report 226 for PSCell1 190 and PSCell2 192 since the UE 168 was configured to conditionally access the target SN166 until before the S-RLF occurs.

[0197] A measurement report can be considered any suitable indication of one or more measurements made by the UE 168. In an example, the measurement report includes an indication of at least one radio signal measurement for at least one target PSCell.

[0198] In an example, the measurement report can include a measurement report as defined in 3GPP TS 38.331.

[0199] At block 208, method 200 includes sending information 224 indicating whether, since the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurs, at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 has been sent by the UE 168, where the at least one target PSCell 228 is a target PSCell detectable by the UE 168 when S-RLF occurs at the UE 168 when the UE 168 was configured to conditionally access the target SN166.

[0200] Therefore, Figure 2 A method 200 is shown, including:

[0201] Transmitting information 224 that indicates whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurs, at least one measurement report 226 has been sent by the UE 168 for at least one target PSCell 228 of the target SN 166, where the at least one target PSCell 228 is a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 while the UE 168 is configured to conditionally access the target SN 166.

[0202] The information 224 for indicating whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurs, at least one measurement report 226 has been sent by the UE 168 for at least one target PSCell 228 of the target SN 166 can include any suitable content, where the at least one target PSCell 228 is a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 while the UE 168 is configured to conditionally access the target SN 166.

[0203] For example, the information 224 can include any suitable information to allow a network node, such as the source SN 172 or the source MN 170, to determine for each of the (one or more) target PSCs 228 of the target SN 166 detectable by the UE 168 when an S-RLF occurs whether at least one measurement report has been sent by the UE 168 while the UE 168 is configured to conditionally access the target SN 166 and before the S-RLF occurs.

[0204] In an example, the information 224 can include a value for each of the (one or more) detectable target PSCs 228, where the value indicates the number of measurement reports sent by the UE 168 for each of the detectable target PSCs 228 while the UE 168 is configured to conditionally access the target SN 166 and before the S-RLF occurs.

[0205] In an example, the information 224 can include a binary indicator for each of the (one or more) detectable target PSCs 228, for indicating whether the UE 168 has sent at least one measurement report 226 while the UE 168 is configured to conditionally access the target SN 166 and before the S-RLF occurs.

[0206] In some examples, method 200 includes transmitting associated radio signal measurements for at least one detectable PSCell 228. At block 208, these associated radio signal measurements for at least one detectable target PSCell 228 can be transmitted along with information 224.

[0207] In an example, block 208 can be performed using any suitable method in any suitable manner. For example, transmitting information 224 at block 208 includes transmitting at least one signal and / or message.

[0208] In some examples, transmitting information 224 includes transmitting at least one SCG failure information message.

[0209] The information 224 transmitted at block 208 can be sent to any suitable network node, such as source MN 172 or source SN 170. Thus, in some examples, transmitting information 224 includes sending information 224 to source MN 172 or source SN 170.

[0210] In an example, from the perspective of source SN 170 or source MN 172, block 208 includes receiving information 224 that indicates whether, since the UE 168 was configured to conditionally access target SN 166 and before an S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of target SN 166 has been sent by UE 168, where the at least one target PSCell 228 is a target PSCell detectable by UE 168 when an S-RLF occurs at UE 168 when UE 168 is configured to conditionally access target SN 166.

[0211] In an example, from the perspective of source SN 170 or source MN 172, receiving information 224 includes receiving information 224 indicating the N target PSCs of target SN 166 with the strongest radio signal measurements at the time of S-RLF occurrence, where N is a positive integer.

[0212] In an example, receiving information 224 includes receiving at least one SCG failure information message.

[0213] In an example, information 224 can be received from any suitable number of different UEs 168.

[0214] In an example, the information 224 can be received and / or collected over any suitable time period. For example, the information 224 can be received from multiple UEs 168 over a long enough time period to ensure that enough information 224 will be received to allow the execution of method 200. The time period for receiving the information 224 can be long enough to ensure that enough information 224 will be received to allow adjustment of at least one parameter 232 at block 204.

[0215] In an example, the time period can be 2 to 3 hours, half a day, one day, 2 to 3 days, one week, 2 to 3 weeks, one month, etc.

[0216] In an example, the information 224 can be received over a key performance indicator (KPI) collection period.

[0217] At block 210, method 200 includes adjusting at least one parameter 232 based at least in part on the received information 224, the parameter being configured to control a measurement event at the UE 168, the measurement event triggering the preparation of at least one target PSCell of the target SN 166 for conditional access by the UE 168.

[0218] Thus, Figure 2 A method 200 is shown that includes:

[0219] Receiving information 224 indicating whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 has been sent by the UE 168, the at least one target PSCell 228 being a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 when the UE 168 is configured to conditionally access the target SN 166; and

[0220] Adjusting at least one parameter 232 configured to control a measurement event at the UE 168, the measurement event triggering the preparation of at least one target PSCell of the target SN 166 for conditional access by the UE 168, based at least in part on the received information 224.

[0221] Adjusting at least one parameter 232 can be considered to change, and / or alter, and / or modify, and / or tune, and / or adapt at least one parameter 232, etc.

[0222] Block 210 can be performed using any suitable method in any suitable manner.

[0223] In an example, adjusting at least one parameter 232 based at least in part on received information 224 includes: adjusting at least one parameter 232 configured to control a measurement event at UE 168 based at least in part on the received information 224, the measurement event triggering preparation of at least one target PSCell of target SN 166 for conditional access by UE 168, such that target SN 166 receives relevant radio measurement results for the preparation of the at least one target PSCell. For example, these radio measurement results can more accurately reflect the radio conditions at the time of at least one previous S-RLF.

[0224] In an example, adjusting at least one parameter 232 based at least in part on received information 224 includes: adjusting at least one parameter 232 configured to control a measurement event at UE 168 based at least in part on the received information 224, the measurement event triggering preparation of at least one target PSCell of target SN 166 for conditional access by UE 168, such that the measurement event occurs at a time when the radio measurement results of the strongest detectable target PSCell 228 indicated in information 224 would reflect the conditions at the time of at least one previous S-RLF.

[0225] That is, in an example, at least one parameter 232 is adjusted such that for a UE 168 in a similar scenario to at least one UE 168 from which information 224 is received, the measurement event triggering preparation of at least one target PSCell of target SN 166 for conditional access by UE 168 is advanced or delayed, thereby allowing avoidance of S-RLF.

[0226] For example, in the example of Figure 3, at least one parameter (e.g., A3_prep_offset) can be adjusted such that the measurement event triggering preparation of the target primary-secondary cell (PSCell) occurs after time t2', at which time PSCell2 192 has the strongest radio measurement results, thereby allowing PSCell2 192 to be prepared for conditional access by UE 168 and avoiding S-RLF for a UE 168 in a similar scenario.

[0227] In an example, it can be assumed that the statistics collected during the collection period remain roughly constant. For example, a user typically moves on a fixed street sidewalk, and these movements are deterministic rather than random.

[0228] In an example, adjusting at least one parameter 232 includes adjusting at least one parameter in the configuration information for UE 168. For example, adjusting at least one parameter 232 may include adjusting at least one of an offset, a hysteresis, and a triggering time (TTT) of an A3 measurement event.

[0229] For example, adjusting at least one parameter 232 may include adjusting at least one of a threshold, a hysteresis, and a TTT of an A4 and / or A5 and / or B1 measurement event.

[0230] In some examples, adjusting at least one parameter 232 includes sending information to configure UE 168 with the adjusted at least one parameter 232.

[0231] UE 168 may be a UE 168 that has received information 224 from it, or may be a UE 168 that has not received information 224 from it.

[0232] Any suitable method may be used to perform sending information to UE 168 to configure UE 168 with the adjusted at least one parameter 232 in any suitable manner.

[0233] In an example, the operation of sending information to configure UE 168 with the adjusted at least one parameter 232 includes sending configuration information.

[0234] In some examples, sending information to configure UE 168 with the adjusted at least one parameter 232 includes sending at least one RRC reconfiguration message.

[0235] In an example, adjusting at least one parameter 232 at block 210 includes: using a mobility robustness optimization algorithm, and / or artificial intelligence, and / or machine learning techniques.

[0236] Any suitable one or more parameters 232 may be adjusted. For example, any suitable one or more parameters 232 configured to control a measurement event at UE 168 may be adjusted, where the measurement event triggers the preparation of at least one PSCell at the target SN 166 for conditional access by UE 168.

[0237] For example, the parameters may include an offset, a hysteresis, a threshold, and / or a TTT, etc.

[0238] In an example, the measurement event that triggers the preparation of at least one PSCell at UE 168 may include any suitable measurement event. For example, the measurement event may include an A3, A4, A5, and / or B1 measurement event, etc.

[0239] In an example, a measurement event that triggers the preparation of at least one PSCell at the UE 168 may include a measurement event that causes the UE 168 to send at least one signal and / or message that causes the preparation of at least one target PSCell to, for example, the source MN 172 or the source SN 170.

[0240] For example, a measurement event at the UE 168 may cause the UE 168 to send at least one MeasurementReport message to, for example, the source MN 172 or the source SN 170.

[0241] For example, a measurement event at the UE 168 may include a measurement event at the UE 168 that causes the UE 168 to send at least one measurement report.

[0242] In an example, a measurement event at the UE 168 may include that the measured signal strength of at least one target PSCell is within a predetermined value of the measured signal strength of the source PSCell.

[0243] In some examples, a measurement event at the UE 168 may include that the measured signal strength of at least one target PSCell is higher than a threshold.

[0244] In some examples, a measurement event at the UE 168 may include that the measured signal strength of at least one target PSCell is higher than a threshold, and the measured signal strength of the source PSCell is less than another threshold.

[0245] In some examples, method 200 includes: determining, by the source SN 170 or the source MN 172, at least partially based on the received information 224, that the UE 168 has sent at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 that can be detected by the UE when S-RLF occurs at the UE 168, and that at least one target PSCell 228 has not been prepared by the target SN 166 for conditional access by the UE 168; wherein adjusting at least one parameter 232 includes adjusting at least one parameter 232 at least partially based on the determination.

[0246] In an example, the source SN 170 or the source MN 172 may use any suitable method in any suitable manner to determine that at least one target PSCell 228 has not been prepared by the target SN 166 for conditional access by the UE 168.

[0247] In an example, the source SN 170 or the source MN 172 may receive information indicating whether the target SN 166 has completed preparation for conditional access for the UE 168. For example, the source SN 170 or the source MN 172 may receive (or not receive) conditional access configuration information for the target PSCell 228.

[0248] If it is determined, at least in part based on the received information 224, that the UE 168 has sent at least one measurement report 226 for at least one detectable target PSCell 228 when S-RLF occurs at the UE 168, and the at least one target PSCell 228 has not been prepared by the target SN 166 for conditional access by the UE 168, then at least one parameter 232 may be adjusted in any suitable manner.

[0249] For example, at least one parameter 232 may be adjusted such that the UE 168 in a similar environment later performs a measurement event that triggers the preparation of at least one PSCell at the target SN 166.

[0250] For example, this is advantageous in scenarios such as the example Figure 3A shown.

[0251] In some examples, the method 200 includes: determining, by the source SN 170 or the source MN 172, at least in part based on the received information 224, that the UE 168 has not sent at least one measurement report 226 for at least one target PSCell 228 detectable by the UE 168 when S-RLF occurs at the UE 168 for the target SN 166; wherein adjusting at least one parameter 232 includes adjusting at least one parameter 232 at least in part based on the determination.

[0252] If it is determined, at least in part based on the received information 224, that when S-RLF occurs at the UE 168, the UE 168 has not sent at least one measurement report 226 for at least one target PSCell 228 detectable by the UE 168 when S-RLF occurs at the UE 168 for the target SN 166, then at least one parameter 232 may be adjusted in any suitable manner.

[0253] For example, at least one parameter 232 may be adjusted such that the UE 168 in a similar environment performs a measurement event that triggers the preparation of at least one PSCell at the target SN 166 in advance.

[0254] This is advantageous in an example such as a rapid degradation of the service / source PSCell radio link quality, so that the measurement event does not trigger the transmission of a measurement report.

[0255] In an example, method 200 may be performed at UE 168 according to a conditional access method / process / procedure using (one or more) adjusted parameters such that UE 168 triggers the preparation of at least one target PSCell for conditional access by UE 168 and configures UE 168 to conditionally access target SN 166.

[0256] For example, method 200 may be performed according to a CPAC method / process / procedure (such as a CPA or CPC method / process / procedure). See, for example, Figure 6 A and 6B.

[0257] In an example, method 200 may be repeated any appropriate number of times.

[0258] As previously described, examples may utilize (one or more) mobility robustness optimization algorithms. In this regard, a self-organizing network (SON) is a network capable of automatically adjusting radio network parameters based on statistics collected from the network. Mobility robustness optimization (MRO) is an example of a SON where the SON handles the adjustment of parameters that control cell changes (such as changes to the PSCell).

[0259] In MRO, in an example, the network collects statistics (fault reports can be one of them) over a period of time (such as represented by a KPI collection period). For example, in each KPI collection period, the KPI statistics are processed by the network and a decision is made to make a change. The network applies these changes to, for example, assistance information and uses these changes to collect new statistics in a new KPI collection period.

[0260] This process may be repeated by the network until a KPI collection cycle is reached where it decides that nothing needs to be done (e.g., the problem is solved or it is no longer possible to adjust thresholds / offsets).

[0261] In this case, it can be considered that MRO has converged. In an example, the values of the performance metrics collected in each KPI collection period should be statistically significant (a large amount of statistics) to have a reliable network decision when making a change.

[0262] Examples of the present disclosure are advantageous and provide technical benefits.

[0263] For example, examples of the present disclosure allow triggering the preparation of (one or more) target PSCs to be intelligently controlled to avoid S-RLF.

[0264] For example, examples of the present disclosure reduce radio link failures caused by preparing incorrect candidate PSCs.

[0265] Figure 4 An example of method 400 is shown.

[0266] In the example, method 400 may be performed by any suitable device including any suitable components for performing method 400. For example, as described with respect to Figure 7A and / or 7B.

[0267] In the example, method 400 may be performed by a UE 168 such as, for example, Figure 2 UE 168.

[0268] In block 402, method 400 includes transmitting information 224 that indicates whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurs, at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 has been transmitted by the UE 168, where the at least one target PSCell 228 is a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 when the UE 168 is configured to conditionally access the target SN 166.

[0269] Thus, Figure 4 An example of method 400 is shown, including:

[0270] Transmitting information 224 that indicates whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurs, at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 has been transmitted by the UE 168, where the at least one target PSCell 228 is a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 when the UE 168 is configured to conditionally access the target SN 166.

[0271] Figure 5 An example of method 500 is shown.

[0272] In the example, method 500 may be performed by any suitable device including any suitable components for performing method 500. For example, as described with respect to Figure 7A and / or 7B.

[0273] In the example, method 500 may be performed by a source SN 170 (such as, for example, Figure 2 source SN 170).

[0274] In the example, method 500 may be performed by a source MN 172 (such as, for example, Figure 2 source MN 172).

[0275] At block 502, method 500 includes receiving information 224 that indicates whether, since UE 168 was configured to conditionally access target SN 166 and before an S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of target SN 166 has been sent by UE 168, where the at least one target PSCell 228 is a target PSCell detectable by UE 168 when an S-RLF occurs at UE 168 when UE 168 is configured to conditionally access target SN 166.

[0276] At block 504, method 500 includes adjusting at least one parameter 232 configured to control a measurement event at UE 168 that triggers the preparation of at least one target SCell of target SN 166 for conditional access by UE 168, at least in part based on the received information 224.

[0277] Thus, Figure 5 An example of method 500 is shown.

[0278] Receiving information 224 that indicates whether, since UE 168 was configured to conditionally access target SN 166 and before an S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of target SN 166 has been sent by UE 168, where the at least one target PSCell 228 is a target PSCell detectable by UE 168 when an S-RLF occurs at UE 168 when UE 168 is configured to conditionally access target SN 166. And

[0279] Adjusting at least one parameter 232 configured to control a measurement event at UE 168 that triggers the preparation of at least one target PSCell of target SN 166 for conditional access by UE 168, at least in part based on the received information 224.

[0280] Figure 6 An example of method 600 is shown.

[0281] Some examples relate to a 3rd Generation Partnership Project (3GPP) network. Figure 6 May be considered to show some such examples.

[0282] The following description may be considered to illustrate some such examples.

[0283] In Figure 6In an example, multiple devices transmit and / or receive one or more signals and / or one or more messages over and / or via 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 Figure 1 network 100 may be used.

[0284] Thus, in the example, Figure 6 multiple devices in form at least a portion of network 100 as described with respect to Figure 1 network 100.

[0285] In the illustrated example, terminal node 110 and four or more access nodes 120 transmit and / or receive one or more signals and / or one or more messages. In Figure 6 the example, terminal node 110 is UE 168, and four or more access nodes 120 are source MN 172, source SN 170, target SN 166, and one or more other potential target nodes 166n.

[0286] In Figure 6 the example, UE 168 has dual connectivity with source MN 172 and source SN 170.

[0287] In the example, Figure 6 communication and / or transmission between the elements shown in may occur via any number of intermediate elements, including none.

[0288] Although one UE 168 is shown in Figure 6 the example, any suitable number of UEs 168 may be included in the example.

[0289] Similarly, any suitable number of network nodes may be included in the example.

[0290] Figure 6 A high-level flowchart is shown in.

[0291] Figure 7A An example of apparatus 130 is illustrated. Apparatus 130 may be a controller of an apparatus of a device, such as terminal node 110 (e.g., UE 168), or network elements 172, 170, and / or 166 (e.g., eNB or gNB). Apparatus 130 may be considered a controller.

[0292] The implementation of 130 may be as a controller circuit. Controller 130 may be implemented solely in hardware, with certain aspects of software including separate firmware, or may be a combination of hardware and software (including firmware).

[0293] As Figure 7AAs shown, the controller 130 can be implemented using instructions, which implement hardware functions by, for example, executable instructions of a computer program 136 in a general-purpose or special-purpose processor 132. The executable instructions can be stored on a computer-readable storage medium (disk, memory, etc.) for execution by such a processor 132.

[0294] The processor 132 is configured to read from and write to the memory 134. The processor 132 may also include an output interface and an input interface. The processor 132 outputs data and / or commands via the output interface and inputs data and / or commands into the processor 132 via the input interface.

[0295] The memory 134 stores a computer program 136 including computer program instructions (computer program code). When loaded into the processor 132, the computer program instructions control the operation of the device 130. The computer program instructions of the computer program 136 provide the logic and routines that enable the device to execute the methods shown in the drawings. The processor 132 can load and execute the computer program 136 by reading the memory 134.

[0296] In an example, the device 130 includes:

[0297] at least one processor 132; and

[0298] at least one memory 134 including computer program code,

[0299] the at least one memory 134 and the computer program code are configured to, together with the at least one processor 132, cause the device 130 to at least perform:

[0300] transmit information 224 indicating whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurs, at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 has been sent by the UE 168. The at least one target PSCell 228 is a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 when the UE 168 is configured to conditionally access the target SN 166.

[0301] In an example, the device 130 includes:

[0302] at least one processor 132; and

[0303] at least one memory 134 including computer program code,

[0304] At least one memory 134 and computer program code are configured to, together with at least one processor 132, cause the apparatus 130 to at least perform:

[0305] Receive information 224 indicating whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 has been sent by the UE 168, where the at least one target PSCell 228 is a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 when the UE 168 is configured to conditionally access the target SN 166; and

[0306] At least partially based on the received information 224, adjust at least one parameter 232 configured to control a measurement event at the UE 168, where the measurement event triggers the preparation of at least one target PSCell of the target SN 166 for conditional access by the UE 168.

[0307] In an example, the apparatus 130 includes:

[0308] At least one processor 132; and

[0309] At least one memory 134 including computer program code,

[0310] The at least one memory stores instructions that, when executed by the at least one processor 132, cause the apparatus to at least:

[0311] Send information 224 indicating whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 has been sent by the UE 168, where the at least one target PSCell 228 is a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 when the UE 168 is configured to conditionally access the target SN 166.

[0312] In an example, the apparatus 130 includes:

[0313] At least one processor 132; and

[0314] At least one memory 134 including computer program code,

[0315] The at least one memory stores instructions that, when executed by the at least one processor 132, cause the apparatus to at least:

[0316] Receive information 224, the information indicating whether, since UE 168 was configured to conditionally access target SN 166 and before S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of target SN 166 has been sent by UE 168, the at least one target PSCell 228 being a target PSCell detectable by UE 168 when S-RLF occurs at UE 168 when UE 168 is configured to conditionally access target SN 166; and

[0317] Adjust, at least in part based on the received information 224, at least one parameter 232 configured to control a measurement event at UE 168, the measurement event triggering the preparation of at least one target PSCell of target SN 166 for conditional access by UE 168.

[0318] As Figure 7A shown, computer program 136 can reach device 130 via any suitable delivery mechanism 162. The delivery mechanism 162 can 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 including or tangibly embodying computer program 136. The delivery mechanism can be a signal configured to reliably convey computer program 136. Device 130 can propagate or transmit computer program 136 as a computer data signal.

[0319] Computer program instructions for causing a device to perform at least the following operations or for at least performing the following operations:

[0320] Send information 224, the information indicating whether, since UE 168 was configured to conditionally access target SN 166 and before S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of target SN 166 has been sent by UE 168, the at least one target PSCell 228 being a target PSCell detectable by UE 168 when S-RLF occurs at UE 168 when UE 168 is configured to conditionally access target SN 166; and

[0321] Computer program instructions for causing a device to perform at least the following operations or for at least performing the following operations:

[0322] Receive information 224, the information indicating whether, since the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurred, at least one measurement report 226 for at least one target PSCell 228 of the target SN 166 has been sent by the UE 168, the at least one target PSCell 228 being a target PSCell detectable by the UE 168 when an S-RLF occurs at the UE 168 when the UE 168 is configured to conditionally access the target SN 166; and

[0323] Adjust, at least in part based on the received information 224, at least one parameter 232 configured to control measurement events at the UE 168, the measurement events triggering the preparation of at least one target PSCell of the target SN 166 for conditional access by the UE 168.

[0324] Computer program instructions may be included in a computer program, a non-transitory computer-readable medium, a computer program product, a machine-readable medium. In some but not necessarily all examples, the computer program instructions may be distributed over more than one computer program.

[0325] Although the memory 134 is illustrated as a single component / circuit, it may be implemented as one or more separate components / circuits, some or all of which may be integrated / removable and / or may provide permanent / semi-permanent / dynamic / buffered storage.

[0326] In an example, the memory 134 includes a random access memory 158 and a read-only memory 160. In an example, the computer program 136 may be stored in the read-only memory 158. For example, see Figure 7B .

[0327] Although the processor 132 is illustrated as a single component / circuit, it may be implemented as one or more separate components / circuits, some or all of which may be integrated / removable. The processor 132 may be a single-core or multi-core processor.

[0328] References to “computer-readable storage medium,” “computer program product,” “tangibly implemented computer program,” etc., or “controller,” “computer,” “processor,” etc., should be understood to cover not only computers with different architectures (such as single / multi-processor architectures and sequential (von Neumann) / parallel architectures), but also dedicated circuits (such as field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), signal processing devices, and other processing circuits). References to computer programs, instructions, code, etc., should be understood to cover software or firmware for programmable processors, such as programmable content for hardware devices, whether instructions for a processor or configuration settings for fixed function devices, gate arrays, or programmable logic devices, etc.

[0329] As used in this application, the term “circuit” may refer to one or more or all of the following:

[0330] (a) Implementations with only hardware circuits (e.g., implementations of transmissions using only analog and / or digital circuits) and

[0331] (b) Combinations of hardware circuits and software, e.g., (where applicable):

[0332] (i) Combinations of analog and / or digital hardware circuits with software / firmware, and

[0333] (ii) Any portions of hardware processors with software (including digital signal processors), software, and memory that work together to cause a device such as a mobile phone or server to perform various functions, and

[0334] (c) Hardware circuits and / or processors (e.g., a microprocessor or a portion of a microprocessor) that require software (e.g., firmware) for operation, but where the software may be absent when not needed for operation.

[0335] This definition of circuit applies to all uses of the term in this application, including in any claims. As a further example, as used in this application, the term circuit also covers implementations with only hardware circuits or processors and their (or their) accompanying software and / or firmware. The term circuit also covers, for example (and if applicable to a particular claim element), 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.

[0336] Blocks shown in the figures may represent steps in a method and / or segments of code in a computer program 136. Specification of a particular order of the blocks does not necessarily imply a required or preferred order of the blocks, and the order and arrangement of the blocks may vary. Additionally, some blocks may be omitted.

[0337] Where structural features have been described, whether the function or functions are explicitly described or implicit, the structural feature may be replaced by a component or components for performing one or more of the functions of the structural feature.

[0338] Thus, in an example, apparatus 130 may include components for:

[0339] transmitting information 224 that indicates whether, since UE 168 was configured to conditionally access target SN 166 and before an S-RLF occurs, at least one measurement report 226 of at least one target PSCell 228 of target SN 166 has been sent by UE 168, the at least one target PSCell 228 being a target PSCell detectable by UE 168 when an S-RLF occurs at UE 168 when UE 168 is configured to conditionally access target SN 166.

[0340] Thus, in an example, apparatus 130 may include components for:

[0341] receiving information 224 that indicates whether, since UE 168 was configured to conditionally access target SN 166 and before an S-RLF occurs, at least one measurement report 226 of at least one target PSCell 228 of target SN 166 has been sent by UE 168, the at least one target PSCell 228 being a target PSCell detectable by UE 168 when an S-RLF occurs at UE 168 when UE 168 is configured to conditionally access target SN 166; and

[0342] adjusting, at least in part based on the received information 224, at least one parameter 232 configured to control a measurement event at UE 168 that triggers preparation of at least one target PSCell of target SN 166 for conditional access by UE 168.

[0343] These systems, devices, methods, and computer programs can use machine learning, including statistical learning. Machine learning is a field of computer science that gives computers the ability to learn without being explicitly programmed. A computer can learn from experience E with respect to a task T of some type and a performance measure P, if its performance (measured by P) on T improves with experience E. A computer typically learns from previous training data to make predictions about future data. Machine learning includes full or partial supervised learning, and full or partial unsupervised learning. It can achieve discrete outputs (such as classification, clustering) and continuous outputs (such as regression). For example, machine learning can be implemented using different methods, such as cost function minimization, artificial neural networks, support vector machines, and Bayesian networks, etc. For example, cost function minimization can be used for linear and polynomial regression, and K-means clustering. Artificial neural networks, such as those with one or more hidden layers, model complex relationships between input vectors and output vectors. Support vector machines can be used for supervised learning. Bayesian networks are directed acyclic graphs that represent the conditional independence of several random variables.

[0344] The above examples can be applied to enable the following components:

[0345] Automotive systems; telecommunications systems; electronic systems including consumer electronics; distributed computing systems; media systems for generating or presenting media content including audio, visual, and audiovisual content as well as mixed, mediated, virtual, and / or augmented reality; personal systems, including personal health systems or personal fitness systems; navigation systems; user interfaces, also known as human-machine interfaces; networks, including cellular, non-cellular, and optical networks; ad-hoc networks; the Internet; the Internet of Things; virtualized networks; and associated software and services.

[0346] According to an example of the present disclosure, the apparatus may be provided in an electronic device, such as a mobile terminal. However, it should be understood that the mobile terminal is only an example of an electronic device that can benefit from an implementation manner of the present disclosure, and thus the scope of the present disclosure should not be considered limited thereto. In some implementation examples, the apparatus may be provided in a mobile terminal, other types of electronic devices, such as but not limited to: mobile communication devices, handheld portable electronic devices, wearable computing devices, portable digital assistants (PDAs), pagers, mobile computers, desktop computers, televisions, gaming devices, laptop computers, cameras, video recorders, GPS devices, and other types of electronic systems can easily adopt the examples of the present disclosure. In addition, regardless of the purpose of the device to provide mobility, they can adopt the examples of the present disclosure at any time.

[0347] As used herein, the term "comprising" has an inclusive rather than exclusive meaning. That is, when it is said that X comprises Y, it means that X may contain only one Y or may contain more than one Y. If the term "comprising" with an exclusive meaning is to be used, it should be explicitly stated in the context as "comprising only one..." or "consisting of...".

[0348] In this specification, the terms "connected", "coupled", and "communicating" and their derivatives refer to operational connection / coupling / communication. It should be understood that any number or combination of intermediate components (including no intermediate components) may exist, i.e., providing direct or indirect connection / coupling / communication. Any such intermediate components may include hardware and / or software components.

[0349] As used herein, the term "determine" (and its grammatical variants) may include, but is not limited to: calculating, computing, processing, deriving, measuring, investigating, identifying, looking up (e.g., looking up in a table, database, or another data structure), ascertaining, and so on. Moreover, "determine" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), obtaining, etc. Moreover, "determine" may include parsing, selecting, picking, establishing, etc.

[0350] In this specification, various examples have been referred to. The description of a feature or function related to an example indicates that those features or functions exist in that example. The use of the terms "example" or "for example" or "may" or "can" in the text indicates that, whether explicitly stated or not, such features or functions exist in at least the described example, whether described as an example or not, and they may but do not necessarily exist in some or all other examples. Thus, "example", "for example", "may" or "can" refer to a specific instance in a class of examples. The attributes of an instance may be the attributes of only that instance or the attributes of the class or of a subclass of the class that includes some, but not all, instances of the class. Thus, features implicitly disclosed by referring to one example rather than another can, where possible, be used as part of a working combination in that other example, but do not necessarily have to be used in that other example.

[0351] Although examples have been described in the foregoing paragraphs with reference to various examples, it should be understood that the given examples may be modified without departing from the scope of the claims.

[0352] In addition to the combinations explicitly described above, the features described previously may also be used in other combinations.

[0353] Although functions have been described with reference to certain features, these functions may be performed by other features (whether or not they are described).

[0354] Although features have been described with reference to certain examples, those features may also be present in other examples, whether or not they are described.

[0355] As used in this document, the terms "a", "an", or "the" have an inclusive rather than an exclusive meaning. That is, whenever X is referred to as including a / an / the Y, it means that X may contain only one Y, or may contain more than one Y, unless the context clearly indicates otherwise. If "a", "an", or "the" is intended to have an exclusive meaning, it should be stated explicitly in the context. In some cases, the use of "at least one" or "one or more" may be for emphasis of the inclusive meaning, but the absence of these terms should not be taken as inferring any exclusive meaning.

[0356] The presence of a feature (or combination of features) in a claim is a reference to that feature or (combination of features) itself, and also a reference to features (equivalent features) that achieve substantially the same technical effect. For example, equivalent features include variant features that achieve substantially the same result in substantially the same way. For example, equivalent features include features that perform substantially the same function and achieve substantially the same result in substantially the same way.

[0357] In this specification, adjectives or adjective phrases are used to describe the features of various examples. Such a description of a feature in relation to an example indicates that the feature exists in some examples that are exactly the same as those described, and also in other examples that are substantially the same as those described.

[0358] Some examples of the present disclosure have been described above. However, those of ordinary skill in the art will recognize possible alternative structural and method features that provide functionality equivalent to the specific examples of such structures and features described above, and for the sake of brevity and clarity, have been omitted from the above description. Nevertheless, the above description should be understood to implicitly include a reference to such alternative structural and method features that provide equivalent functionality, unless such alternative structural or method features are explicitly excluded in the above description of the examples of the present disclosure.

[0359] Although in the foregoing specification the applicant has endeavored to draw attention to those features that are considered important, it should be understood that the applicant may seek protection by the claims for any patentable feature or combination of features mentioned above and / or shown in the drawings, whether or not they have been emphasized.

Claims

1. A user equipment, comprising components for the following operations: Sending information indicating whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurred, at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been sent by the user equipment, where the at least one target primary cell is a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment while the user equipment is configured to conditionally access the target secondary node.

2. The user equipment according to claim 1, comprising components for the following operations: Determining that the secondary radio link failure has occurred while the user equipment is configured to conditionally access the target secondary node; Determining at least one detectable target primary cell in the secondary cell group of the target secondary node and associated radio signal measurements at the time of the secondary radio link failure; and Determining whether at least one measurement report for the at least one detectable target primary cell in the secondary cell group has been sent since the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

3. The user equipment according to claim 2, wherein Determining the at least one detectable target primary cell in the secondary cell group includes: determining N target primary cells in the secondary cell group having the strongest radio signal measurements at the time of the secondary radio link failure, where N is a positive integer.

4. The user equipment according to any one of claims 1 to 3, wherein, Sending the information includes sending at least one SCG failure information message.

5. A method, comprising: Sending, from a user equipment, information indicating whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurred, at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been sent by the user equipment, where the at least one target primary cell is a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment while the user equipment is configured to conditionally access the target secondary node.

6. The method according to claim 5, comprising: Determining that the secondary radio link failure has occurred while the user equipment is configured to conditionally access the target secondary node; Determining at least one detectable target primary cell in the secondary cell group of the target secondary node and associated radio signal measurements at the time of the secondary radio link failure; And Determining whether at least one measurement report for the at least one detectable target primary cell in the secondary cell group has been sent since the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

7. The method according to claim 6, wherein, Determining the at least one detectable target primary cell in the secondary cell group includes: determining N target primary cells in the secondary cell group having the strongest radio signal measurements at the time of the secondary radio link failure, where N is a positive integer.

8. The method according to any one of claims 5 to 7, wherein, Sending the information includes sending at least one SCG failure information message.

9. A computer program comprising instructions for causing a device to at least perform the following operations: Send information from a user equipment, the information indicating whether at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been sent by the user equipment since the user equipment was configured to conditionally access the target secondary node and before a secondary radio link failure occurs, the at least one target primary cell being a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node.

10. The computer program according to claim 9, comprising instructions for causing a device to at least perform the following operations: Determine that the secondary radio link failure has occurred when the user equipment is configured to conditionally access the target secondary node; Determine at least one detectable target primary cell in the secondary cell group of the target secondary node and associated radio signal measurements at the time of the secondary radio link failure; and Determine whether at least one measurement report for at least one detectable target primary cell in the secondary cell group has been sent since the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurs.

11. The computer program according to claim 10, wherein, Determining the at least one detectable target primary cell in the secondary cell group includes: determining N target primary cells in the secondary cell group having the strongest radio signal measurements at the time of the secondary radio link failure, where N is a positive integer.

12. The computer program according to any one of claims 9 to 11, wherein, Sending the information includes sending at least one SCG failure information message.

13. A device comprising components for the following operations: Receive information, the information indicating whether at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been sent by the user equipment since the user equipment was configured to conditionally access the target secondary node and before a secondary radio link failure occurs, the at least one target primary cell being a target primary cell detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node; and At least partially based on the received information, adjust at least one parameter configured to control a measurement event at the user equipment, the measurement event triggering preparation for conditional access by the user equipment to at least one target primary cell in a secondary cell group of the target secondary node.

14. The device according to claim 13, comprising components for the following operations: Send information to configure the user equipment with the adjusted at least one parameter.

15. The device according to claim 14, wherein, Sending the information includes sending at least one RRC reconfiguration message.

16. The device according to any one of claims 13 to 15, wherein, Receiving the information includes receiving information indicating N target primary cells in the secondary cell group of the target secondary node having the strongest radio signal measurements at the time of the secondary radio link failure, where N is a positive integer.

17. The apparatus according to any one of claims 13 to 16, wherein, Receiving the information includes receiving at least one SCG failure information message.

18. The apparatus according to any one of claims 13 to 17, comprising means for: determining, at least in part based on the received information, that the user equipment has transmitted at least one measurement report for at least one target primary cell that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment in a secondary cell group of a target secondary node, and that the at least one target primary cell in the secondary cell group has not been prepared by the target secondary node for conditional access by the user equipment; Among them, Adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

19. The apparatus according to any one of claims 13 to 18, comprising means for: determining, at least in part based on the received information, that the user equipment has not transmitted the at least one measurement report for at least one target primary cell that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment in a secondary cell group of the target secondary node; Among them, Adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

20. A method, comprising: receiving information indicating whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurred, the user equipment has transmitted at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node, the at least one target primary cell being a target primary cell that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node; and adjusting, at least in part based on the received information, at least one parameter configured to control a measurement event at the user equipment that triggers preparation of at least one target primary cell in a secondary cell group of the target secondary node for conditional access by the user equipment.

21. The method according to claim 20, comprising: transmitting information to configure the user equipment with the adjusted at least one parameter.

22. The method according to claim 21, wherein, Transmitting the information includes transmitting at least one RRC reconfiguration message.

23. The method according to any one of claims 20 to 22, wherein Receiving the information includes receiving information indicating N target primary cells having the strongest radio signal measurements at the time of the secondary radio link failure in a secondary cell group of the target secondary node, where N is a positive integer.

24. The method according to any one of claims 20 to 23, wherein, Receiving the information includes receiving at least one SCG failure information message.

25. The method according to any one of claims 20 to 24, comprising: Determine, at least in part based on the received information, that the user equipment has sent at least one measurement report for at least one target primary cell that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment in a secondary cell group of a target secondary node, and that the at least one target primary cell in the secondary cell group has not been prepared by the target secondary node for conditional access by the user equipment; wherein adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

26. The method according to any one of claims 20 to 25, comprising: Determine, at least in part based on the received information, that the user equipment has not sent at least one measurement report for at least one target primary cell that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment in a secondary cell group of the target secondary node; wherein adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

27. A computer program comprising instructions for causing an apparatus to at least perform the following operations: Receive information indicating whether, since the user equipment was configured to conditionally access a target secondary node and before a secondary radio link failure occurred, at least one measurement report for at least one target primary cell in a secondary cell group of the target secondary node has been sent by the user equipment, the at least one target primary cell being a target primary cell that is detectable by the user equipment when the secondary radio link failure occurs at the user equipment when the user equipment is configured to conditionally access the target secondary node; and Adjust, at least in part based on the received information, at least one parameter configured to control a measurement event at the user equipment that triggers the preparation of at least one target primary cell in a secondary cell group of the target secondary node for conditional access by the user equipment.

28. The computer program according to claim 27, comprising instructions for causing an apparatus to at least perform the following operations: Send information to configure the user equipment with the adjusted at least one parameter.

29. The computer program according to claim 28, wherein, Sending the information includes sending at least one RRC reconfiguration message.

30. The computer program according to any one of claims 27 to 29, wherein, Receiving the information includes receiving information indicating N target primary cells having the strongest radio signal measurements at the secondary radio link failure in a secondary cell group of the target secondary node, where N is a positive integer.

31. The computer program according to any one of claims 27 to 30, wherein Receiving the information includes receiving at least one SCG failure information message.

32. The computer program according to any one of claims 27 to 31, comprising instructions for causing an apparatus to at least perform the following operations: Determine, at least in part based on the received information, that the user equipment has sent at least one measurement report for at least one target primary cell detectable by the user equipment at the time of occurrence of the secondary radio link failure in the secondary cell group of the target secondary node, and that the at least one target primary cell in the secondary cell group has not been prepared by the target secondary node for conditional access by the user equipment; Among them, Adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

33. The computer program according to any one of claims 27 to 32, comprising instructions for causing a device to perform at least the following operations: Determine, at least in part based on the received information, that the user equipment has not sent at least one measurement report for at least one target primary cell detectable by the user equipment at the time of occurrence of the secondary radio link failure in the secondary cell group of the target secondary node; Wherein adjusting the at least one parameter includes adjusting the at least one parameter at least in part based on the determination.

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