Conditional Access

Abstract

1. A user equipment comprising: means for transmitting, when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access a target secondary node, information indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, detectable by the user equipment, was transmitted by the user equipment after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

Description

[Technical Field]

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

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

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

[0004] According to various, but not necessarily all, embodiments, a user equipment is provided, the user equipment comprising: The method further comprises means for transmitting, when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access the target secondary node, information indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, which is detectable by the user equipment, was transmitted by the user equipment after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

[0005] In some examples, the user equipment: means for determining that a secondary radio link failure has occurred while the user equipment is configured to conditionally access the target secondary node; means for determining at least one detectable target primary cell of a secondary cell group of the target secondary node and associated radio signal measurements upon secondary radio link failure; means for determining whether at least one measurement report for at least one detectable target primary cell of a secondary cell group has been transmitted before a secondary radio link failure occurs, after the user equipment is configured to conditionally access the target secondary node; Equipped with.

[0006] In some examples, determining at least one detectable target primary cell of the secondary cell group includes determining N target primary cells of 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.

[0007] In some examples, transmitting the information includes transmitting at least one SCG fault information message.

[0008] According to various, but not necessarily all, embodiments, a method is provided, the method comprising: When a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access the target secondary node, transmitting information from the user equipment indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, which is detectable by the user equipment, was transmitted by the user equipment after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

[0009] In some examples, the method comprises: determining that a secondary radio link failure occurred while the user equipment was configured to conditionally access the target secondary node; determining at least one detectable target primary cell of a secondary cell group of the target secondary node and associated radio signal measurements upon secondary radio link failure; determining whether at least one measurement report for at least one detectable target primary cell of the secondary cell group has been transmitted before a secondary radio link failure occurs after the user equipment is configured to conditionally access the target secondary node; Includes.

[0010] In some examples, determining at least one detectable target primary cell of the secondary cell group includes determining N target primary cells of 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.

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

[0012] According to various, but not necessarily all, embodiments, a computer program is provided that includes instructions, the instructions including at least the following: The apparatus is configured to, when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access the target secondary node, transmit information from the user equipment indicating whether at least one measurement report for at least one target primary cell of the secondary cell group of the target secondary node, which is detectable by the user equipment, was transmitted after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

[0013] In some examples, the computer program includes instructions, the instructions including at least: determining that a secondary radio link failure occurred while the user equipment was configured to conditionally access the target secondary node; determining at least one detectable target primary cell of a secondary cell group of the target secondary node and associated radio signal measurements upon secondary radio link failure; determining whether at least one measurement report for at least one detectable target primary cell of the secondary cell group has been transmitted before a secondary radio link failure occurs after the user equipment is configured to conditionally access the target secondary node; The purpose is to have the device perform the above.

[0014] In some examples, determining at least one detectable target primary cell of the secondary cell group includes determining N target primary cells of 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.

[0015] In some examples, transmitting the information includes transmitting at least one SCG fault information message.

[0016] According to various, but not necessarily all, embodiments, an apparatus is provided, the apparatus comprising: means for receiving information indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, detectable by the user equipment when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access the target secondary node, has been transmitted by the user equipment after the user equipment is configured to conditionally access the target secondary node and before the secondary radio link failure occurs; means for adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event in the user equipment that triggers preparation of at least one target primary cell of the secondary cell group of the target secondary node for conditional access by the user equipment; Equipped with.

[0017] In some examples, the device comprises: Means for transmitting information for configuring the user equipment with the adjusted at least one parameter are provided.

[0018] In some instances, Transmitting the information includes transmitting at least one RRC reconfiguration message.

[0019] In some instances, Receiving the information includes receiving information indicating N target primary cells of a secondary cell group of the target secondary node having the strongest radio signal measurements during a secondary radio link failure, where N is a positive integer.

[0020] In some instances, Receiving the information includes receiving at least one SCG fault information message.

[0021] In some examples, the device comprises: means for determining, based at least in part on the received information, that at least one measurement report has been sent by the user equipment for at least one target primary cell of a secondary cell group of the target secondary node that is detectable by the user equipment when a secondary radio link failure occurs in the user equipment, and that the at least one target primary cell of the secondary cell group has not been prepared by the target secondary node for conditional access by the user equipment; Adjusting the at least one parameter includes adjusting the at least one parameter based at least in part on the determination.

[0022] In some examples, the device comprises: means for determining, based at least in part on the received information, that at least one measurement report was not transmitted by the user equipment for at least one target primary cell of a secondary cell group of the target secondary node that is detectable by the user equipment when a secondary radio link failure occurs in the user equipment; Adjusting the at least one parameter includes adjusting the at least one parameter based at least in part on the determination.

[0023] According to various, but not necessarily all, embodiments, a method is provided, the method comprising: receiving information indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, detectable by the user equipment, when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access the target secondary node, has been transmitted by the user equipment after the user equipment is configured to conditionally access the target secondary node and before the secondary radio link failure occurs; adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event in the user equipment that triggers preparation of at least one target primary cell of the secondary cell group of the target secondary node for conditional access by the user equipment; Includes.

[0024] In some examples, the method comprises: and transmitting information for configuring the user equipment with the adjusted at least one parameter.

[0025] In some examples, transmitting the information includes transmitting at least one RRC reconfiguration message.

[0026] In some examples, receiving the information includes receiving information indicating N target primary cells of a secondary cell group of the target secondary node having the strongest radio signal measurements during the secondary radio link failure, where N is a positive integer.

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

[0028] In some examples, the method comprises: determining, based at least in part on the received information, that at least one measurement report was transmitted by the user equipment for at least one target primary cell of a secondary cell group of the target secondary node that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment, and that the at least one target primary cell of the secondary cell group was not prepared by the target secondary node for conditional access by the user equipment; Adjusting the at least one parameter includes adjusting the at least one parameter based at least in part on the determination.

[0029] In some examples, the method comprises: determining, based at least in part on the received information, that at least one measurement report was not transmitted by the user equipment for at least one target primary cell of a secondary cell group of the target secondary node that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment; Adjusting the at least one parameter includes adjusting the at least one parameter based at least in part on the determination.

[0030] According to various, but not necessarily all, embodiments, a computer program is provided that includes instructions, the instructions including at least the following: receiving information indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, detectable by the user equipment, when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access the target secondary node, has been transmitted by the user equipment after the user equipment is configured to conditionally access the target secondary node and before the secondary radio link failure occurs; adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event in the user equipment that triggers preparation of at least one target primary cell of the secondary cell group of the target secondary node for conditional access by the user equipment; The purpose is to have the device perform the above.

[0031] In some examples, the computer program includes instructions, the instructions including at least: The device is configured to transmit information for configuring the user equipment with the adjusted at least one parameter.

[0032] In some examples, transmitting the information includes transmitting at least one RRC reconfiguration message.

[0033] In some examples, receiving the information includes receiving information indicating N target primary cells of a secondary cell group of the target secondary node having the strongest radio signal measurements during the secondary radio link failure, where N is a positive integer.

[0034] In some examples, receiving the information includes receiving at least one SCG fault information message.

[0035] In some examples, the computer program includes instructions, the instructions including at least: determining, based at least in part on the received information, that at least one measurement report was sent by the user equipment for at least one target primary cell of a secondary cell group of the target secondary node that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment, and that the at least one target primary cell of the secondary cell group was not prepared by the target secondary node for conditional access by the user equipment; Adjusting the at least one parameter includes adjusting the at least one parameter based at least in part on the determination.

[0036] In some examples, the computer program includes instructions, the instructions including at least: determining, based at least in part on the received information, that at least one measurement report was not transmitted by the user equipment for at least one target primary cell of a secondary cell group of the target secondary node that is detectable by the user equipment when a secondary radio link failure occurs at the user equipment; Adjusting the at least one parameter includes adjusting the at least one parameter based at least in part on the determination.

[0037] According to various, but not necessarily all, embodiments, an apparatus is provided, the apparatus comprising: at least one processor; at least one memory for storing instructions; which instructions, when executed by at least one processor, cause the apparatus to at least perform at least a portion of one or more methods disclosed herein.

[0038] According to various, but not necessarily all, embodiments, an apparatus is provided that comprises means for performing at least a portion of one or more of the methods disclosed herein.

[0039] Various, but not necessarily all, examples are provided that are claimed in the appended claims.

[0040] Although the above examples and optional features of the present disclosure are described separately, it is understood that their provision in all possible combinations and permutations is included within the present disclosure. It is understood that various examples of the present disclosure can include any or all of the features described with respect to other examples of the present disclosure, and vice versa. Similarly, it is recognized that any one or more or all of the features can be implemented by / included in / enabled by apparatus, methods, and / or computer program instructions, in any combination, as desired and necessary.

[0041] A description of a function should also be considered to disclose any suitable means for implementing that function.

[0042] Some examples will now be described with reference to the accompanying drawings. [Brief explanation of the drawings]

[0043] [Figure 1] 1A and 1B illustrate examples of the subject matter described herein. [Figure 2] FIG. 1 illustrates another example of the subject matter described herein. [Figure 3A] FIG. 1 illustrates another example of the subject matter described herein. [Figure 3B] FIG. 1 illustrates another example of the subject matter described herein. [Figure 4] FIG. 1 illustrates another example of the subject matter described herein. [Figure 5] FIG. 1 illustrates another example of the subject matter described herein. [Figure 6A] FIG. 1 illustrates another example of the subject matter described herein. [Figure 7A] FIG. 1 illustrates another example of the subject matter described herein. [Figure 7B] FIG. 1 illustrates another example of the subject matter described herein. DETAILED DESCRIPTION OF THE INVENTION

[0044] The figures are not necessarily to scale. Certain features and views of the figures may be shown diagrammatically or exaggerated in scale for clarity and conciseness. For example, the dimensions of some elements of the figures may be exaggerated relative to other elements to aid in illustration. Like reference numerals are used in the figures to designate like features. For clarity, not all reference numerals are necessarily shown in every figure.

[0045] definition Master Node (MN): A network node that provides control plane connectivity towards the core network.

[0046] Master Cell Group (MCG): A group of cells associated with an MN, including PCells and SCells.

[0047] Secondary Node (SN): A network node that provides additional radio resources for a UE, but is not an MN.

[0048] Secondary Cell Group (SCG): A group of cells associated with an SN, including PSCells and SCells.

[0049] PCell: A cell for uplink / downlink connection to an MN. A cell of an MCG used to initiate initial access to an MN.

[0050] PSCell: A cell for uplink / downlink connection to an SN. A cell of an SCG used to initiate initial access to an SN.

[0051] Conditional Handover (CHO): A handover procedure that is triggered by the UE only when a configured execution condition is met for a prepared candidate cell. The condition is pre-configured by the network. In 3GPP, the conditional handover execution condition is specified by condExecutionCond in the CondReconfigToAddModList information element in the conditional reconfiguration information element in the RRC reconfiguration message.

[0052] Dual Connectivity (DC): The UE has simultaneous connections to the MN and the SN, which is the operation mode of the UE in RRC_CONNECTED, which is configured by the master cell group and the secondary cell group.

[0053] Configuration information: Information used to configure the operation of a UE. In 3GPP, configuration information may be provided, for example, in an RRC reconfiguration message. The term "configuration information comprising" an entity (e.g., handover execution conditions for a primary cell, SN addition conditions for dual connectivity with a primary cell, etc.) can mean that the configuration information includes sufficient information to obtain the entity. It may or may not include all parameters of the entity; it may instead comprise a pointer to the entity or parameters of the entity, or it can mean that the configuration includes the entity.

[0054] In 3GPP, the RRC reconfiguration message specifies a conditional reconfiguration information element that provides additional information about the DC. The conditional reconfiguration information element includes a CondReconfigToAddModList information element. The CondReconfigToAddModList information element includes condExecutionCond and condRRCReconfig. Additional conditions for the primary secondary cell (PSCell) are specified by condExecutionCond. The RRC reconfiguration message to be applied when the specified conditions are met is provided by condRRCReconfig.

[0055] Measurement Configuration Configuration information used to configure a UE to perform measurements. In 3GPP, the measurement configuration may be provided, for example, in an RRC reconfiguration message. The term "[entity] measurement configuration" (e.g., source primary cell measurement configuration) may refer to a measurement configuration prepared by an entity.

[0056] A can contains one or more measurement objects and one or more reporting configurations associated by one or more measurement identities.

[0057] The can contains the MeasConfig information element specified in TS 38.331.

[0058] 1 shows an example of a network 100 comprising multiple network nodes, including end nodes 110, access nodes 120, and one or more core nodes 129. The end nodes 110 and the access nodes 120 communicate with each other. The one or more core nodes 129 communicate with the access nodes 120.

[0059] Network 100, in this example, is a wireless telecommunications network in which at least some of the end nodes 110 and access nodes 120 communicate with each other using the transmission / reception of radio waves / signals.

[0060] One or more core nodes 129 may, in some examples, communicate with each other. One or more access nodes 120 may, in some examples, communicate with each other.

[0061] Network 100 may be a cellular network comprising multiple cells 122, each served by an access node 120. In this example, the interface between end node 110 and access node 120 that defines cell 122 is a wireless interface 124.

[0062] The access node 120 is a cellular radio transceiver. The end node 110 is a cellular radio transceiver.

[0063] In the illustrated example, cellular network 100 is a third generation Partnership Project (3GPP) network in which terminal nodes 110 are user equipment (UE) and access nodes 120 are base stations.

[0064] In the example, network 100 is an Evolved Universal Terrestrial Radio Access network (E-UTRAN). E-UTRAN consists of E-UTRAN Node Bs (eNBs) 120 that provide E-UTRA user plane and control plane (RRC) protocol terminations towards UEs 110. The eNBs 120 are interconnected with each other by an X2 interface 126. The eNBs are also connected to a Mobility Management Entity (MME) 129 by an S1 interface 128.

[0065] In another example, network 100 is a Next Generation Radio Access network (NG-RAN). The NG-RAN consists of gNodeBs (gNBs) 120 that provide user plane and control plane (RRC) protocol terminations towards UEs 110. The gNBs 120 are interconnected with each other by an Xn interface 126. The gNBs are also connected to an Access and Mobility Management Function (AME) by an N2 interface 128.

[0066] In an example, the network 100 may comprise a combination of E-UTRAN and NG-RAN.

[0067] User equipment may comprise mobile equipment. When reference is made to user equipment, the reference includes and encompasses reference to mobile equipment, wherever possible.

[0068] The UE 168 may perform a handover procedure to change the serving cell of the UE 168. In an example, the handover procedure may be a conditional handover procedure.

[0069] A conditional handover (CHO) procedure may be considered a handover that is triggered by the UE 168 when one or more handover execution conditions are met. The one or more handover execution conditions may be pre-configured by the network 100.

[0070] In an example, the UE 168 may be equipped with additional radio resources that use dual connectivity (DC).

[0071] In the DC, the configured set of serving cells for the UE 168 has two subsets: a Master Cell Group (MCG) containing the serving cells of the Master Node (MN) 172 and a Secondary Cell Group (SCG) containing the serving cells of the Secondary Node (SN) 170.

[0072] In an example, a change of a primary cell of a secondary cell group (SCG) may be configured. The UE 168 may be configured with an execution condition for handover to perform an SN change to one or more target SNs 166. Thus, the UE 168 may be configured to conditionally access one or more target SNs 166.

[0073] In an example, an initiating node, e.g., source MN 172 or source SN 170, may be configured to control measurement events at UE 168 that trigger preparation of at least one target primary cell (PSCell) of a secondary cell group of target SN 166 for conditional access by UE 168, and / or may be configured to efficiently and / or intelligently determine at least one parameter involved in controlling.

[0074] FIG. 2 illustrates an example of a method 200 .

[0075] In an example, Figure 2 can be considered to illustrate multiple methods. For example, Figure 2 illustrates one or more actions among multiple actors / entities. In an example, Figure 2 can be considered to illustrate multiple methods performed by individual actors / entities.

[0076] One or more of the features discussed in connection with FIG. 2 may be found in one or more of the other figures.

[0077] In the example of Figure 2, multiple devices transmit and / or receive one or more signals and / or one or more messages across, through, and / or using a network. In the example, any suitable form of communication in any suitable network may be used. For example, at least a portion of network 100 of Figure 1 may be used.

[0078] Thus, in the example, the devices of FIG. 2 form at least a portion of the network 100 described in connection with FIG.

[0079] In the example shown, the terminal node 110 and the three access nodes 120 may transmit and / or receive one or more signals and / or one or more messages. In the example of Figure 2, the terminal node 110 is a UE 168, and the three access nodes 120 are a source MN 172, a source SN 170, and a target SN 166.

[0080] 2, 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.

[0081] In the example of FIG. 2, the UE 168 is configured to conditionally access the target SN 166 .

[0082] The UE 168 may be configured to conditionally access the target SN 166 in any suitable manner using any suitable method. For example, the UE 168 may receive any suitable configuration information to configure the UE 168 to access the target SN 166 upon meeting at least one criterion.

[0083] In an example, the UE 168 may be configured with at least one CPAC configuration. For example, the UE 168 may be configured with at least one CPC or CPA configuration.

[0084] In an example, accessing a PSCell or any other suitable cell includes performing a random access procedure with the cell.

[0085] In an example, accessing a PSCell or any other suitable cell includes establishing a connection with the cell.

[0086] In examples, communication and / or transmission between the elements shown in FIG. 2 may proceed through any number of intervening elements, including no intervening elements.

[0087] Although one UE 168 is shown in the example of FIG. 2, any suitable number of UEs 168 may be included in an example.

[0088] Similarly, any suitable number of network nodes may be included in an example.

[0089] In examples, method 200 and / or at least portions of method 200 may be considered a method for enforcing conditional access of a target SN.

[0090] In examples, method 200 and / or at least portions of method 200 may be considered a method for enhancing or improving measurement reporting by a UE.

[0091] In examples, method 200 and / or at least portions of method 200 may be considered a method for enhancing or improving the determination of parameters for configuring a UE for conditional access to a target SN.

[0092] In the example shown, the location of the blocks indicates the entity that performs the action, e.g., block 202 is performed in / by UE 168.

[0093] In examples, method 200 is part of a method for configuring and / or permitting 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 / process / procedure. For example, method 200 can be part of a conditional PSCell Change (CPC) method / process / procedure or a conditional PSCell Addition (CPA) method / process.

[0094] In some examples, method 200 may be considered SN-initiated, i.e., in some examples, method 200 may be initiated by and / or include source SN 170. For example, method 200 may be part of an SN-initiated CPAC method / process / procedure.

[0095] In the example shown, method 200 is SN initiated, block 210 is performed by the source SN, and block 208 involves the source SN 170.

[0096] In some examples, method 200 may be considered MN-initiated, i.e., in some examples, method 200 may be initiated by the source MN 172 and / or without the involvement of the source SN 170. For example, method 200 may be part of an MN-initiated CPAC method / process / procedure.

[0097] In such an example, block 210 is performed in / by source MN 172 and block 208 does not involve source SN 170 .

[0098] At block 202 , the method 200 includes determining that a secondary radio link failure (S-RLF) occurred while the UE 168 was configured to conditionally access the target SN 166 .

[0099] Determining that S-RLF has occurred may be performed in any suitable manner using any suitable method.

[0100] The S-RLF can be any type of S-RLF that occurs for any suitable reason, for example, the S-RLF can occur while connected to the source SN 170, when performing random access to the target PSCell, etc.

[0101] In an example, the UE 168 may be considered to be configured to conditionally access the target SN 166 when the UE 168 receives and / or applies configuration information to configure the UE 168 to access the target SN 166 upon meeting at least one criterion.

[0102] In an example, the UE 168 may be considered to be configured to conditionally access the target SN 166 when the UE 168 is configured with at least one CPAC configuration, e.g., when the UE 168 is configured with at least one CPC or CPA configuration.

[0103] As an example, reference is made to the example of FIG.

[0104] 3A illustrates an example scenario. In the example of FIG. 3A, a UE 168 is located within and served by a source PSCell 188.

[0105] In the example shown, the UE 168 moves along a trajectory 196, and as the UE 168 moves along the trajectory 196, the UE detects two PSCells, namely, PSCell1 190 and PSCell2 192.

[0106] FIG. 3B shows plots of reference signal received power (RSRP) for source PSCell 188, PSCell1 190, and PSCell2 192 as UE 168 moves along trajectory 196 shown in the example of FIG. 3A.

[0107] With respect to the plot shown in the example of FIG. 3B, at time t1, PSCell1 190 reaches a measurable signal strength that fulfills the RSRP offset 194 configured in UE 168, triggering preparation of PSCell1 190 as a candidate cell for conditional access by UE 168, such as CPC.

[0108] 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 source PSCell 188, which then triggers, e.g., an SgNB (conditional) Change Required message to the MN and, e.g., an SgNB (conditional) Addition Request message from the MN to the target SN, including the measurement results of target PSCell1 190 and PSCell2 192.

[0109] In the example shown, the target SN may decide to prepare target PSCell1 190 because target PSCell1 190 has the best reception measurements.

[0110] However, later in the example of FIG. 3B, at time instance t3, the UE 168 experiences a secondary radio link failure with respect to the current serving PSCell and sends S-RLF failure information to the MN.

[0111] In the example shown, the target SN is late in preparing target PSCell2 192, which results in an S-RLF in source PSCell 188 because the conditional access execution criteria for PSCell1 190 to be prepared was not met.

[0112] 3A and 3B may be considered to illustrate S-RLF and S-RLF situations experienced by UE 168.

[0113] In the example of Figure 3, the preparation of the target PSCell 190, 192 was premature when the measurements did not reflect the actual radio conditions at the time of conditional access execution. Therefore, in the example of Figure 3, if the parameters controlling the measurement event in the UE that triggers the preparation of the target PSCell were adjusted / different, the S-RLF could have been avoided.

[0114] 2, at block 204, the method 200 includes determining at least one detectable target PSCell 228 and associated wireless signal measurements of the target SN 166 during the S-RLF. The wireless signal measurements may include wireless signal power measurements.

[0115] Determining at least one detectable target PSCell 228 and associated radio signal measurements of the target SN 166 during S-RLF may be performed in any suitable manner using any suitable method.

[0116] In an example, a detectable target PSCell 228 is a target PSCell 228 from which the UE 168 can receive at least one signal.

[0117] In an example, a detectable target PSCell 228 is a target PSCell 228 for which the UE 168 can determine at least one wireless signal measurement.

[0118] In an example, a detectable target PSCell 228 is a target PSCell from which a UE 168 can receive at least one signal having a received signal power greater than or equal to a certain value. Any suitable value may be used.

[0119] In some examples, a detectable target PSCell 228 is a target PSCell from which the UE 168 can receive at least one signal having a received signal power of −156 dBm or greater.

[0120] The detectable target PSCell 228 may be considered a measurable target PSCell and / or an identifiable target PSCell and / or an observable target PSCell and / or a distinguishable target PSCell and / or a perceptible target PSCell, etc.

[0121] The detectable target PSCell 228 may be considered a target PSCell that is detectable by the UE 168 when an S-RLF occurs.

[0122] The wireless signal measurements 230 may include any suitable measurement or measurements. For example, the wireless signal measurements 230 may include any suitable measurement or measurements indicative of the wireless power of at least one signal received from and / or associated with the target SN 166 and / or the target PSCell.

[0123] In an example, the wireless signal measurements 230 include 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-and-noise ratio (SINR) measurement.

[0124] In examples, the wireless signal measurements 230 may be considered associated with a target PSCell of the target SN 166 because the wireless signal measurements 230 are performed on and / or in relation to at least one signal received from the target PSCell of the target SN 166.

[0125] In an example, the wireless signal measurements 230 may be considered to be associated with a target PSCell of the target SN 166 because the wireless signal measurements may indicate, for example, the power of at least one received wireless signal from the target PSCell.

[0126] In examples, the period of S-RLF includes the period before and / or after and / or around when S-RLF occurs. Thus, in examples, the period of S-RLF includes the period before S-RLF occurs and / or the period after S-RLF occurs.

[0127] Any suitable period of time before and / or after the occurrence of an S-RLF may be used, for example, any suitable period of time that provides suitable information regarding at least one detectable target PSCell 228 of the target SN 166 and associated wireless signal measurements.

[0128] For example, periods in the range of 1 second to 30 minutes may be used.

[0129] For example, a period in the range of 30 seconds to 20 minutes may be used.

[0130] For example, a period in the range of 1 minute to 15 minutes may be used.

[0131] For example, a period in the range of 5 to 10 minutes may be used.

[0132] In an example, the period can be at least Z microseconds, where Z is a positive integer.

[0133] In an example, the period can be at least Y milliseconds, where Y is a positive integer.

[0134] In an example, the period can be at least M seconds, where M is a positive integer.

[0135] In an example, the period can be at least X minutes, where X is a positive integer.

[0136] Thus, in an example, block 204 may be considered to include determining at least one detectable target PSCell 228 and associated radio signal measurements of the target SN 166 within a period that includes when the S-RLF occurred.

[0137] 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 wireless signal measurement for each of the at least one target PSCell.

[0138] For example, in the example of FIG. 3, UE 168 may determine that target PSCell1 190 and target PSCell2 192 are detectable during S-RLF and may determine associated wireless signal measurements for PSCell1 190 and PSCell2 192 when S-RLF occurs.

[0139] In some examples, determining at least one detectable target PSCell 228 includes determining N target PSCells having the strongest radio signal measurements during S-RLF, where N is a positive integer.

[0140] N can be any suitable positive integer, for example, N can be in the range of 1 to 64.

[0141] For example, in the example of FIG. 3, if N is equal to 1, the UE 168 will determine PSCell2 192 because PSCell2 192 has the strongest radio signal measurement during S-RLF.

[0142] At block 206, the method 200 includes determining whether at least one measurement report 226 for at least one detectable target PSCell 228 was transmitted after the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurred.

[0143] 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, e.g., a network node such as source MN 172 or source SN 170, after UE 168 is configured to conditionally access target SN 166 and before S-RLF occurs.

[0144] In an example, block 206 includes determining whether at least one measurement report 226 for at least one detectable target PSCell 228 has been sent to the network, e.g., to the source MN 172 or the source SN 170, after the UE 168 has been configured to conditionally access the target SN 166 and before the S-RLF occurs.

[0145] Block 206 may be implemented in any suitable manner using any suitable method.

[0146] In an example, in block 206, the UE 168 determines from the logged / stored information whether the UE 168 has transmitted / reported at least one measurement report 226 for at least one detectable target PSCell 228 within the period between when the UE 168 is configured to conditionally access the target SN 166 and when an S-RLF occurs.

[0147] For example, the UE 168 may determine from the logged / stored information whether the UE 168 has transmitted / reported at least one measurement report 226 for at least one detectable target PSCell 228 within the period between when the UE 168 is configured to conditionally access the target SN 166 and when an S-RLF occurs.

[0148] For example, in the example of FIG. 3, the UE 168 would determine whether the UE 168 reported / transmitted at least one measurement report 226 for PSCell1 190 and PSCell2 192 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred.

[0149] A measurement report may 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 wireless signal measurement for at least one target PSCell.

[0150] In an example, the measurement report may include a measurement report as specified in 3GPP TS 38.331.

[0151] At block 208, the method 200 includes transmitting information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, detectable by the UE 168 when an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, was transmitted by the UE 168 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred.

[0152] As a result, FIG. 2 illustrates a method 200, which includes: When an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, transmitting information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, detectable by the UE 168, was transmitted by the UE 168 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred.

[0153] When an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, the information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the SN 166 that is detectable by the UE 168 was transmitted by the UE 168 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred may include any suitable information.

[0154] For example, information 224 may include any suitable information to enable a network node, such as source SN 172 or source MN 170, to determine, for each target PSCell 228 of SN 166 detectable by UE 168 during S-RLF, whether at least one measurement report was transmitted by UE 168 while UE 168 was configured to conditionally access target SN 166 and before S-RLF occurred.

[0155] In an example, the information 224 may include a value for each detectable target PSCell 228 indicating the number of measurement reports transmitted by the UE 168 for each detectable target PSCell 228 while the UE 168 is configured to conditionally access the target SN 166 and before an S-RLF occurs.

[0156] In an example, the information 224 may include a binary indicator for each detectable target PSCell 228 indicating whether at least one measurement report 226 was transmitted by the UE 168 while the UE 168 was configured to conditionally access the target SN 166 and before an S-RLF occurred.

[0157] In some examples, the method 200 includes transmitting associated wireless signal measurements for the at least one detectable target PSCell 228. The associated wireless signal measurements for the at least one detectable target PSCell 228 may be transmitted along with the information 224 at block 208.

[0158] Block 208 may be implemented in any suitable manner using any suitable method. In an example, transmitting information 224 in block 208 includes transmitting at least one signal and / or message.

[0159] In some examples, transmitting the information 224 includes transmitting at least one SCG fault information message.

[0160] The information 224 may be transmitted at block 208 and may be transmitted to any appropriate network node, such as the source MN 172 or the source SN 170. Thus, in some examples, transmitting the information 224 includes transmitting the information 224 to the source MN 172 or the source SN 170.

[0161] In an example, from the perspective of the source SN 170 or the source MN 172, block 208 includes receiving information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, detectable by the UE 168 when an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, was transmitted by the UE 168 after the UE was configured to conditionally access the target SN but before the S-RLF occurs.

[0162] In an example, from the perspective of the source SN 170 or source MN 172, receiving information 224 includes receiving information 224 indicating N target PSCells of the target SN 166 having the strongest radio signal measurements at the time of S-RLF, where N is a positive integer.

[0163] In an example, receiving the information 224 includes receiving at least one SCG fault information message.

[0164] In examples, the information 224 may be received from any suitable number of different UEs 168 .

[0165] In examples, the information 224 may be received and / or collected over any suitable period of time. For example, the information 224 may be received from multiple UEs 168 over a period long enough to allow sufficient information 224 to be received to allow the method 200 to be performed. For example, the information 224 may be received over a period long enough to allow sufficient information 224 to be received to allow at least one parameter 232 to be adjusted in block 204.

[0166] In examples, the period can be a few hours, half a day, a day, a few days, a week, a few weeks, a month, and the like.

[0167] In an example, information 224 may be received over a Key Performance Indicator (KPI) collection period.

[0168] At block 210, the method 200 includes adjusting, based at least in part on the received information 224, at least one parameter 232 configured to control a measurement event in the UE 168 that triggers preparation of at least one target PSCell of the target SN 166 for conditional access by the UE 168.

[0169] As a result, FIG. 2 illustrates a method 200, which includes: receiving information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, 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, was transmitted by the UE 168 after the UE was configured to conditionally access the target SN and before the S-RLF occurs; adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event at the UE that triggers preparation of the at least one target PSCell of the target SN for conditional access by the UE; Includes.

[0170] Adjusting at least one parameter 232 may be considered as changing and / or altering and / or modifying and / or adjusting and / or adapting the at least one parameter 232, etc.

[0171] Block 210 may be implemented in any suitable manner using any suitable method.

[0172] In an example, adjusting the at least one parameter 232 based at least in part on the received information 224 includes adjusting, at least in part on the received information 224, the at least one parameter 232 configured to control a measurement event at the UE 168 that triggers preparation of the at least one target PSCell of the target SN 166 for conditional access by the UE 168, such that the target SN 166 receives radio measurements related to the preparation of the at least one target PSCell, e.g., radio measurements that more accurately reflect radio conditions during the at least one previous S-RLF.

[0173] In an example, adjusting at least one parameter 232 based at least in part on the received information 224 includes adjusting at least one parameter 232 configured to control a measurement event in the UE 168 that triggers 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, such that the measurement event occurs when radio measurements for the strongest detectable target PSCell 228 indicated in the information 224 reflect the situation when at least one previous S-RLF occurred.

[0174] That is, in the example, at least one parameter 232 is adjusted to cause a measurement event that triggers preparation of at least one target PSCell of the target SN 166 for conditional access by the UE 168, for UEs 168 in a similar situation to the at least one UE 168 from which the information 224 is received, to occur earlier or later to allow S-RLF to be avoided.

[0175] For example, in the example of FIG. 3, at least one parameter such as A3_prep_offset may be adjusted so that the measurement event that triggers preparation of the target PSCell occurs after time t2′, at which time PSCell2 192 has the strongest radio measurements, allowing PSCell2 192 to be prepared for conditional access by UE 168 and avoiding S-RLF from occurring for UE 168 in a similar situation.

[0176] In an example, it may be assumed that the statistics collected over the collection period remain approximately constant, e.g., users typically move on fixed street pedestrian lanes, which is deterministic and not random.

[0177] In an example, adjusting the at least one parameter 232 includes adjusting at least one parameter in configuration information for the UE 168. For example, adjusting the at least one parameter 232 may include adjusting at least one of an offset, a hysteresis, and a time-to-trigger (TTT) of an A3 measurement event.

[0178] For example, adjusting the at least one parameter 232 may include adjusting at least one of a threshold, a hysteresis, and a TTT for the A4 and / or A5 and / or B1 measurement events.

[0179] In some examples, adjusting the at least one parameter 232 includes transmitting information to configure the UE 168 with the adjusted at least one parameter 232 .

[0180] The UE 168 may be a UE 168 from which the information 224 was received or may be a UE 168 from which the information 224 was not received.

[0181] Transmitting information for configuring the UE 168 with the adjusted at least one parameter 232 may be performed in any suitable manner using any suitable method.

[0182] In an example, transmitting information to configure the UE 168 with the adjusted at least one parameter 232 includes transmitting configuration information.

[0183] In some examples, transmitting information to configure the UE 168 with the adjusted at least one parameter 232 includes transmitting at least one RRC reconfiguration message.

[0184] In examples, adjusting the at least one parameter 232 in block 210 includes using a mobility robustness optimization algorithm and / or artificial intelligence and / or machine learning techniques.

[0185] Any suitable parameter(s) 232 may be adjusted. For example, any suitable parameter(s) 232 configured to control measurement events at the UE 168 that trigger preparation of at least one PSCell of the target SN 166 for conditional access by the UE 168 may be adjusted.

[0186] For example, the parameters may include an offset, a hysteresis, a threshold, and / or a TTT.

[0187] In examples, the measurement event at the UE 168 that triggers the preparation of at least one PSCell may include any suitable measurement event. For example, the measurement event may include an A3, A4, A5, and / or B1 measurement event, etc.

[0188] In an example, a measurement event at UE 168 that triggers the preparation of at least one PSCell includes, for example, a measurement event that causes UE 168 to transmit at least one signal and / or message to source MN 172 or source SN 170, resulting in the preparation of at least one target PSCell.

[0189] For example, a measurement event at the UE 168 may cause the UE 168 to transmit at least one measurement report message, eg, to the source MN 172 or the source SN 170 .

[0190] For example, a measurement event at the UE 168 may include a measurement event at the UE 168 that causes the UE 168 to transmit at least one measurement report.

[0191] In an example, a measurement event at the UE 168 may include a measured signal strength for at least one target PSCell that is within a predetermined value of the measured signal strength of the source PSCell.

[0192] In some examples, a measurement event at the UE 168 may include a measured signal strength for at least one target PSCell being greater than a certain threshold.

[0193] In some examples, a measurement event at the UE 168 may include a measured signal strength for at least one target PSCell that is greater than a certain threshold and a measured signal strength for a source PSCell that is less than another threshold.

[0194] In some examples, the method 200 includes determining, based at least in part on the received information 224, by the source SN 170 or the source MN 172 that at least one measurement report 226 was transmitted by the UE 168 for at least one target PSCell 228 of the target SN 166 that is detectable by the UE when an S-RLF occurs in the UE 168, and that the at least one target PSCell 228 was not prepared by the target SN 166 for conditional access by the UE 168, and adjusting the at least one parameter 232 includes adjusting the at least one parameter 232 based at least in part on the determination.

[0195] In an example, the source SN 170 or source MN 172 may determine in any suitable manner using any suitable method that at least one target PSCell 228 has not been prepared by the target SN 166 for conditional access by the UE 168.

[0196] In an example, the source SN 170 or the source MN 172 may receive information indicating whether the target SN 166 has been prepared for conditional access by the UE 168. For example, the source SN 170 or the source MN 172 may (or may not) receive conditional access configuration information for the target PSCell 228.

[0197] If it is determined, based at least in part on the received information 224, that at least one measurement report 226 was transmitted by the UE 168 for at least one detectable target PSCell 228 when an S-RLF occurs in the UE 168, and that at least one target PSCell 227 was not 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.

[0198] For example, the at least one parameter 232 may be adjusted such that the UE 168 performs a measurement event that later triggers the preparation of at least one PSCell in the target SN 166 under similar circumstances.

[0199] This is advantageous in examples such as that of Figure 3A.

[0200] In some examples, the method 200 includes determining, based at least in part on the received information 224, by the source SN 170 or the source MN 172 that at least one measurement report 226 was not transmitted by the UE 168 for at least one target PSCell 228 of the target SN 166 that is detectable by the UE 168 when an S-RLF occurs in the UE 168, and adjusting the at least one parameter 232 includes adjusting the at least one parameter 232 based at least in part on the determination.

[0201] If it is determined, based at least in part on the received information 224, that at least one measurement report 226 was not transmitted by the UE 168 for at least one target PSCell 228 of the target SN 166 that is detectable by the UE 168 when an S-RLF occurs in the UE 168, then at least one parameter 232 may be adjusted in any suitable manner.

[0202] For example, the at least one parameter 232 may be adjusted such that the UE 168 performs a measurement event that triggers early preparation of at least one PSCell in the target SN 166 in a similar situation.

[0203] This is advantageous in cases of rapid degradation of the serving / source PSCell radio link quality, so that the measurement event does not trigger the transmission of a measurement report.

[0204] In an example, method 200 may then proceed according to a conditional access method / process / procedure using the adjusted parameters in UE 168 to trigger UE 168 to prepare at least one target PSCell for conditional access by UE 168 and configure UE 168 to conditionally access target SN 166.

[0205] For example, method 200 may then proceed according to a CPAC method / process / procedure, such as a CPA or CPC method / process / procedure. See, for example, Figures 6A and 6B.

[0206] In examples, the method 200 may be repeated any suitable number of times.

[0207] As mentioned above, examples may utilize mobility robustness optimization algorithms. In this regard, a Self-Organizing Network (SON) is a network that can automatically adjust radio network parameters based on collected statistics from the network. Mobility Robustness Optimization (MRO), in examples, is an example of a SON that handles the adjustment of parameters that control cell changes (e.g., PSCell changes).

[0208] In MRO, the network, in an example, collects statistics (fault reports can be one of the statistics) over a specific period, indicated, for example, by a KPI collection period. At each KPI collection period, for example, the KPI statistics are processed by the network, and a decision is made to make a change. The network applies the change, for example, to assistance information, and collects new statistics regarding the change, for example, within a new KPI collection period.

[0209] This process may be repeated by the network until the KPI collection period is reached and the process determines that nothing needs to be done (e.g., the problem has been resolved or it is no longer possible to adjust the thresholds / offsets).

[0210] In this case, the MRO can be considered to have converged. In the example, the values ​​of the performance metrics collected in each of the KPI collection periods should be statistically significant (large number of statistics) in order to have reliable network decisions when making changes.

[0211] Examples of the present disclosure are advantageous and provide technical benefits.

[0212] For example, the disclosed examples allow triggering of preparation of a target PSCell to be intelligently controlled to avoid S-RLF.

[0213] For example, the disclosed examples reduce radio link failures caused by preparing an incorrect candidate PSCell.

[0214] FIG. 4 illustrates an example of a method 400 .

[0215] In examples, method 400 may be performed by any suitable apparatus comprising any suitable means for performing method 400. For example, an apparatus described in connection with Figures 7A and / or 7B.

[0216] In an example, the method 400 may be performed by a UE 168, such as the UE 168 of FIG.

[0217] At block 402, the method 400 includes transmitting information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, detectable by the UE 168 when an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, was transmitted by the UE 168 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred.

[0218] As a result, FIG. 4 illustrates a method 400, which includes: When an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, transmitting information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, detectable by the UE 168, was transmitted by the UE 168 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred.

[0219] FIG. 5 illustrates an example of a method 500 .

[0220] In examples, method 500 may be performed by any suitable apparatus comprising any suitable means for performing method 500. For example, an apparatus described in connection with Figures 7A and / or 7B.

[0221] In an example, the method 500 may be performed by a source SN 170, such as source SN 170 of FIG.

[0222] In an example, the method 500 may be performed by a source MN 172, such as the source MN 172 of FIG.

[0223] At block 502, the method 500 includes receiving information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, 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, was transmitted by the UE 168 after the UE was configured to conditionally access the target SN and before the S-RLF occurs.

[0224] At block 504, the method 500 includes adjusting, based at least in part on the received information 224, at least one parameter 232 configured to control a measurement event at the UE 168 that triggers preparation of at least one target PSCell of the target SN 166 for conditional access by the UE 168.

[0225] As a result, FIG. 5 illustrates a method 500, which includes: receiving information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, 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, was transmitted by the UE 168 after the UE was configured to conditionally access the target SN and before the S-RLF occurs; adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event at the UE that triggers preparation of the at least one target PSCell of the target SN for conditional access by the UE; Includes.

[0226] FIG. 6 illustrates an example of a method 600 .

[0227] Some examples relate to 3rd Generation Partnership Project (3GPP) networks. Figure 6 can be considered to illustrate some such examples.

[0228] The following discussion can be considered to illustrate some such examples.

[0229] In the example of Figure 6, multiple devices transmit and / or receive one or more signals and / or one or more messages across, through, and / or using a network. In the example, any suitable form of communication in any suitable network may be used. For example, at least a portion of network 100 of Figure 1 may be used.

[0230] Thus, in the example, the devices of FIG. 6 form at least a portion of the network 100 described in connection with FIG.

[0231] In the example shown, the terminal node 110 and the four or more access nodes 120 transmit and / or receive one or more signals and / or one or more messages. In the example of Figure 2, the terminal node 110 is a UE 168, and the four or more access nodes 120 are a source MN 172, a source SN 170, a target SN 166, and other possible target nodes 166n.

[0232] In the example of FIG. 6, the UE 168 has dual connectivity with a source MN 172 and a source SN 170 .

[0233] In examples, communication and / or transmission between the elements shown in FIG. 6 may proceed through any number of intervening elements, including no intervening elements.

[0234] Although one UE 168 is shown in the example of FIG. 6, any suitable number of UEs 168 may be included in an example.

[0235] Similarly, any suitable number of network nodes may be included in an example.

[0236] A high level flow chart is shown in FIG.

[0237] 7A shows an example of apparatus 130. Apparatus 130 may be a controller of an apparatus of a device such as an end node 110, e.g., a UE 168, or a network element 172, 170, and / or 166, such as an eNB or gNB. Apparatus 130 may also be considered a controller.

[0238] An implementation of 130 may be controller circuitry. Controller 130 may be implemented solely in hardware, may have certain aspects in software including firmware only, or may be a combination of hardware and software (including firmware).

[0239] As shown in FIG. 7A, the controller 130 may be implemented using instructions that enable hardware functionality, for example, by using executable instructions of a computer program 136 in a general-purpose or special-purpose processor 132, which may be stored on a computer-readable storage medium (disk, memory, etc.) for execution by such processor 132.

[0240] Processor 132 is configured to read from and write to memory 134. Processor 132 may include an output interface, through which data and / or commands are output by processor 132, and an input interface, through which data and / or commands are input to processor 132.

[0241] The memory 134 stores a computer program 136 including computer program instructions (computer program code), which, when loaded into the processor 132, controls 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 implement the methods illustrated in the accompanying figures. The processor 132 can load and execute the computer program 136 by reading the memory 134.

[0242] In an example, the device 130 at least one processor 132; at least one memory 134 containing computer program code; Equipped with The at least one memory 134 and the computer program code are executed by the at least one processor 132 to at least: The device 130 is configured to, when an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, transmit information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, detectable by the UE 168, was transmitted by the UE 168 before the S-RLF occurred after the UE 168 was configured to conditionally access the target SN 166.

[0243] In an example, the device 130 at least one processor 132; at least one memory 134 containing computer program code; Equipped with The at least one memory 134 and the computer program code are executed by the at least one processor 132 to at least: receiving information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, 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, was transmitted by the UE 168 after the UE was configured to conditionally access the target SN and before the S-RLF occurs; adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event at the UE that triggers preparation of the at least one target PSCell of the target SN for conditional access by the UE; The apparatus 130 is configured to perform the following.

[0244] In an example, the device 130 at least one processor 132; at least one memory 134 containing computer program code; Equipped with The at least one memory stores instructions that, when executed by the at least one processor 132, cause the device to at least: When an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, information 224 is transmitted indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, which is detectable by the UE 168, was transmitted by the UE 168 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred.

[0245] In an example, the device 130 at least one processor 132; at least one memory 134 containing computer program code; Equipped with The at least one memory stores instructions that, when executed by the at least one processor 132, cause the device to at least: receiving information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, 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, was transmitted by the UE 168 after the UE was configured to conditionally access the target SN and before the S-RLF occurs; adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event at the UE that triggers preparation of the at least one target PSCell of the target SN for conditional access by the UE; Make them do so.

[0246] 7A, the computer program 136 may arrive at the device 130 by any suitable delivery mechanism 162. The delivery mechanism 162 may be, for example, a machine-readable medium, a computer-readable medium, a non-transitory computer-readable storage medium, a computer program product, a memory device, a recording medium such as a Compact Disc Read-Only Memory (CD-ROM) or a Digital Versatile Disc (DVD) or a solid-state memory, or an article of manufacture that comprises or tangibly embodies the computer program 136. The delivery mechanism may also be a signal configured to reliably transfer the computer program 136. The device 130 may propagate or transmit the computer program 136 as a computer data signal.

[0247] At least the following: transmitting information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, detectable by the UE 168, was transmitted by the UE 168 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred, when the S-RLF occurred at the UE 168 while the UE 168 was configured to conditionally access the target SN 166; computer program instructions that cause an apparatus to perform or be performed.

[0248] At least the following: receiving information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, 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, was transmitted by the UE 168 after the UE was configured to conditionally access the target SN and before the S-RLF occurs; adjusting, based at least in part on the received information 224, at least one parameter 232 configured to control a measurement event at the UE 168 that triggers preparation of the at least one target PSCell of the target SN 166 for conditional access by the UE 168; computer program instructions that cause an apparatus to perform or be performed.

[0249] The computer program instructions may be included in a computer program, a non-transitory computer-readable medium, a computer program product, a machine-readable medium, etc. In some, but not necessarily all, examples, the computer program instructions may be distributed across two or more computer programs.

[0250] Although shown as a single component / circuitry, memory 134 may be implemented as one or more separate components / circuitry, some or all of which may be integrated / removable and / or provide permanent / semi-permanent / dynamic / cached storage.

[0251] In an example, the memory 134 comprises 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. See, for example, Figure 7B.

[0252] Although the processor 132 is shown as a single component / circuitry, it may be implemented as one or more separate components / circuitry, some or all of which may be integrated / removable. The processor 132 may be a single-core or multi-core processor.

[0253] References to a "computer-readable storage medium," "computer program product," "tangibly embodied computer program," etc., or to a "controller," "computer," "processor," etc., should be understood to encompass computers having different architectures, such as single / multi-processor architectures and sequential (von Neumann) / parallel architectures, as well as special purpose circuitry, such as field-programmable gate arrays (FPGAs), application specific circuits (ASICs), signal processing devices, and other processing circuitry. References to a computer program, instructions, code, etc., should be understood to encompass software for a programmable processor, whether instructions for a processor, configuration settings for a fixed function device, gate array, or programmable logic device, etc., or firmware, e.g., the programmable content of a hardware device.

[0254] As used in this application, the term "circuitry" refers to the following: (a) hardware-only circuitry implementations (e.g., implementations using only analog and / or digital circuitry); and (b) a combination of hardware circuitry and software, e.g., (where applicable); (i) a combination of analog circuitry and / or digital hardware circuitry with software / firmware; and (ii) any portion of a hardware processor (including a digital signal processor) with software, software, and one or more memories that work together to cause a device, such as a mobile phone or a server, to perform various functions; and (c) hardware circuitry and / or processors, such as microprocessors or portions of microprocessors, that require software (e.g., firmware) to operate, but the software may not be present when not required for operation; It may refer to one or more or all of the following:

[0255] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers simple hardware circuits or processors and their (or their) accompanying software and / or firmware implementations. The term circuitry also covers, for example, and where applicable to particular claim elements, baseband integrated circuits for mobile devices or similar integrated circuits in servers, cellular network devices, or other computing or network devices.

[0256] The blocks shown in the accompanying figures may represent method steps and / or sections of code within the computer program 136. The illustration of a particular order to the blocks does not necessarily imply that there is a required or preferred order to the blocks, and the order and arrangement of the blocks may vary. Additionally, some blocks may be omitted.

[0257] When a structural feature is described, that function or functions may be explicitly described, implicitly described, or replaced by a means that performs one or more of the functions of the structural feature.

[0258] Therefore, the device 130 may, in the example: When an S-RLF occurs in the UE 168 while the UE 168 is configured to conditionally access the target SN 166, a means may be provided for transmitting information 224 indicating whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, detectable by the UE 168, was transmitted by the UE 168 after the UE 168 was configured to conditionally access the target SN 166 and before the S-RLF occurred.

[0259] Therefore, the device 130 may, in the example: means for receiving information 224 that indicates whether at least one measurement report 226 for at least one target PSCell 228 of the target SN 166, 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, has been transmitted by the UE 168 after the UE has been configured to conditionally access the target SN and before the S-RLF occurs; means for adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event at the UE that triggers preparation of at least one target PSCell of the target SN for conditional access by the UE; It can be equipped with:

[0260] Systems, devices, methods, and computer programs may use machine learning, which can include statistical learning. Machine learning is a field of computer science that gives computers the ability to learn without being explicitly programmed. A computer learns from experience E for a class of tasks T and a performance measure P if its performance at the task T, as measured by P, improves with experience E. Computers can often learn from prior training data to make predictions about future data. Machine learning includes fully or partially supervised learning and fully or partially unsupervised learning. Machine learning may enable discrete outputs (e.g., classification, clustering) and continuous outputs (e.g., regression). Machine learning may be implemented, for example, using different approaches, such as cost function minimization, artificial neural networks, support vector machines, and Bayesian networks. Cost function minimization may be used, for example, in linear and polynomial regression and K-means clustering. For example, an artificial neural network with one or more hidden layers models the complex relationship between input and output vectors. Support vector machines may be used for supervised learning. A Bayesian network is a directed acyclic graph that shows the conditional independence of multiple random variables.

[0261] The examples described above apply as implementable components of automotive systems, telecommunications systems, electronic systems including consumer electronic products, distributed computing systems, media systems that generate or render audio, visual, and audiovisual content, as well as media content including mixed reality, mediated reality, virtual reality, 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 related software and services.

[0262] The apparatus may be provided in an electronic device, such as a mobile terminal, in accordance with examples of the present disclosure. However, it should be understood that a mobile terminal is merely illustrative of an electronic device that would benefit from example implementations of the present disclosure and, therefore, should not be considered to limit the scope of the present disclosure to mobile terminals. In certain example implementations, the apparatus may be provided in a mobile terminal, but other types of electronic devices, such as, but not limited to, mobile communication devices, hand-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 readily use examples of the present disclosure. Furthermore, devices can readily use examples of the present disclosure regardless of their intended purpose of providing mobility.

[0263] The term "comprise" is used in this document in an inclusive, non-exclusive sense. That is, any reference to X comprises Y indicates that X may comprise only one Y, or may comprise two or more Ys. Where it is intended to use "comprise" in the exclusive sense, this will be made clear in the context by a reference to "comprising only one ..." or by using "consisting."

[0264] In this description, the terms "connect," "couple," "communication," and their derivatives mean to be operatively connected / coupled / in communication. That is, it should be recognized that any number or combination of intervening components may be present (including no intervening components) to provide a direct or indirect connection / coupling / communication. Any such intervening components may include hardware and / or software components.

[0265] As used herein, the terms "determine / determining" (and grammatical variations thereof) can include at least calculating, computing, processing, deriving, measuring, investigating, identifying, looking up (e.g., looking up in a table, database, or another data structure), ascertaining, etc. Similarly, the term "determining" can include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), obtaining, etc. Similarly, "determining" can include resolving, selecting, choosing, establishing, etc.

[0266] In this description, reference has been made to various examples. The description of a feature or function in connection with an example indicates that the feature or function is present in that example. The use of the term "example" or "for example" or "can" or "may" in the text indicates that such feature or function is present in at least the described example, whether or not explicitly stated, and that, whether or not described in the example, it may, but does not necessarily, be present in some or all of the other examples. Thus, "example," "for example," "can," or "may" refers to a particular instance within a class of examples. Properties of an instance can be properties of that instance only or of the class or of a subclass of the class that includes some but not all of the instances in the class. Thus, a feature described with reference to one example but not another example implicitly discloses that it can, if possible, be used in the other example as part of a practical combination, but not necessarily used in the other example.

[0267] Although examples have been described in the preceding paragraphs with reference to various examples, it should be appreciated that modifications to the given examples can be made without departing from the scope of the claims.

[0268] Features described in the preceding description may be used in combinations other than those explicitly described above.

[0269] Although functions have been described with reference to particular features, those functions may be implemented by other features, whether or not described.

[0270] Although features have been described with reference to particular examples, those features may be present in other examples, whether or not described.

[0271] The terms "a," "an," or "the" are used in this document with an inclusive, rather than exclusive, meaning. That is, a reference to X comprising one / an / the Y indicates that X may comprise only one Y or may comprise two or more Ys, unless the context clearly indicates the contrary. If "a," "an," or "the" is intended to be used with an exclusive meaning, this will be clear in the context. In some circumstances, the use of "at least one" or "one or more" may be used to emphasize an inclusive meaning, but the absence of these terms should not be considered to infer any exclusive meaning.

[0272] The presence of a feature (or combination of features) in a claim is a reference to that feature or (combination of features) by itself, and similarly to features that achieve substantially the same technical effect (equivalent features). Equivalent features include, for example, features that are modifications and achieve substantially the same result in substantially the same way. Equivalent features include, for example, features that perform substantially the same function in substantially the same way to achieve substantially the same result.

[0273] In this description, reference has been made to various examples using adjectives or adjective phrases to describe properties of the examples. Such description of a property in relation to an example indicates that the property is present in some of the examples just described and is present in other examples that are substantially described.

[0274] The above description describes several examples of the present disclosure; however, those skilled in the art will know of possible alternative structural and method features, which provide equivalent functionality to the specific examples of such structural and method features described herein above, and which have been omitted from the above description for brevity and clarity. Nevertheless, the above description should be read as implicitly including references to such alternative structural and method features, which provide equivalent functionality, unless such alternative structural or method features are expressly excluded in the above description of examples of the present disclosure.

[0275] While efforts have been made in the foregoing specification to draw attention to features believed to be important, it should be understood that applicant may seek protection in the claims with respect to any patentable feature or combination of features previously described with reference to and / or shown in the drawings, whether or not emphasized.

Claims

1. A user equipment, means for transmitting information indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, detectable by the user equipment when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access a target secondary node, was transmitted by the user equipment after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

2. means for determining that the secondary radio link failure occurred while the user equipment was configured to conditionally access the target secondary node; means for determining the at least one detectable target primary cell of a secondary cell group of the target secondary node and associated radio signal measurements upon the secondary radio link failure; means for determining whether the at least one measurement report for the at least one detectable target primary cell of a secondary cell group has been transmitted before the secondary radio link failure occurs, after the user equipment is configured to conditionally access the target secondary node; 10. The user equipment of claim 1, comprising:

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

4. The user equipment of any one of claims 1 to 3, wherein transmitting the information comprises transmitting at least one SCG failure information message.

5. a method for transmitting, when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access a target secondary node, information from the user equipment indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, which measurement report is detectable by the user equipment, was transmitted by the user equipment after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

6. determining that the secondary radio link failure occurred while the user equipment was configured to conditionally access the target secondary node; determining the at least one detectable target primary cell of a secondary cell group of the target secondary node and associated radio signal measurements during the secondary radio link failure; determining whether the at least one measurement report for the at least one detectable target primary cell of a secondary cell group was transmitted after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred; The method of claim 5 , comprising:

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

8. The method of any one of claims 5 to 7, wherein transmitting the information comprises transmitting at least one SCG fault information message.

9. A computer program comprising instructions, said instructions including at least the following:

1. A computer program product that causes an apparatus to perform the following: when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access a target secondary node, transmitting from the user equipment information indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, which measurement report is detectable by the user equipment, was transmitted by the user equipment after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred.

10. at least, determining that the secondary radio link failure occurred while the user equipment was configured to conditionally access the target secondary node; determining the at least one detectable target primary cell of a secondary cell group of the target secondary node and associated radio signal measurements during the secondary radio link failure; determining whether the at least one measurement report for the at least one detectable target primary cell of a secondary cell group was transmitted after the user equipment was configured to conditionally access the target secondary node and before the secondary radio link failure occurred; 10. The computer program of claim 9, comprising instructions for causing an apparatus to perform:

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

12. The computer program product of any one of claims 9 to 11, wherein transmitting the information comprises transmitting at least one SCG fault information message.

13. means for receiving information indicating whether, when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access a target secondary node, at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, detectable by the user equipment, has been transmitted by the user equipment after the user equipment has been configured to conditionally access the target secondary node and before the secondary radio link failure occurs; means for adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event in the user equipment that triggers preparation of at least one target primary cell of a secondary cell group of the target secondary node for conditional access by the user equipment; An apparatus comprising:

14. The apparatus of claim 13 , comprising: means for transmitting information for configuring a user equipment with the adjusted at least one parameter.

15. The apparatus of claim 14 , wherein transmitting the information includes transmitting at least one RRC reconfiguration message.

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

17. The apparatus of any one of claims 13 to 16, wherein receiving the information comprises receiving at least one SCG fault information message.

18. means for determining, based at least in part on the received information, that when the secondary radio link failure occurs at the user equipment, the at least one measurement report was sent by the user equipment for the at least one target primary cell of a secondary cell group of a target secondary node that is detectable by the user equipment, and that the at least one target primary cell of the secondary cell group was not prepared by the target secondary node for conditional access by the user equipment; The apparatus of any one of claims 13 to 17, wherein adjusting the at least one parameter comprises adjusting the at least one parameter based at least in part on the determination.

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

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

21. 21. The method of claim 20, comprising transmitting information for configuring user equipment with the adjusted at least one parameter.

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

23. 23. The method of claim 20, wherein receiving the information includes receiving information indicating N target primary cells of a secondary cell group of the target secondary node having strongest radio signal measurements at the time of the secondary radio link failure, where N is a positive integer.

24. The method of any one of claims 20 to 23, wherein receiving the information comprises receiving at least one SCG fault information message.

25. determining, based at least in part on the received information, that the at least one measurement report was transmitted by the user equipment for the at least one target primary cell of a secondary cell group of a 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 of a secondary cell group was not prepared by the target secondary node for conditional access by the user equipment; The method of any one of claims 20 to 24, wherein adjusting the at least one parameter comprises adjusting the at least one parameter based at least in part on the determination.

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

27. A computer program comprising instructions, said instructions including at least the following: receiving information indicating whether at least one measurement report for at least one target primary cell of a secondary cell group of the target secondary node, detectable by the user equipment, when a secondary radio link failure occurs in the user equipment while the user equipment is configured to conditionally access a target secondary node, has been transmitted by the user equipment after the user equipment is configured to conditionally access the target secondary node and before the secondary radio link failure occurs; adjusting, based at least in part on the received information, at least one parameter configured to control a measurement event in the user equipment that triggers preparation of at least one target primary cell of a secondary cell group of the target secondary node for conditional access by the user equipment; A computer program for causing an apparatus to execute the above.

28. instructions, the instructions including at least: transmitting information for configuring a user equipment with the adjusted at least one parameter.

28. A computer program as claimed in claim 27, for causing an apparatus to carry out the steps of:

29. 30. The computer program product of claim 28, wherein transmitting the information includes transmitting at least one RRC reconfiguration message.

30. 30. The computer program product of claim 27, wherein receiving the information includes receiving information indicating N target primary cells of a secondary cell group of the target secondary node having strongest radio signal measurements at the time of the secondary radio link failure, where N is a positive integer.

31. The computer program product of any one of claims 27 to 30, wherein receiving the information comprises receiving at least one SCG fault information message.

32. instructions, the instructions including at least: determining, based at least in part on the received information, that the at least one measurement report was sent by the user equipment for the at least one target primary cell of a secondary cell group of a 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 of the secondary cell group was not prepared by the target secondary node for conditional access by the user equipment; 32. The computer program product of claim 27, wherein adjusting the at least one parameter comprises adjusting the at least one parameter based at least in part on the determination.

33. instructions, the instructions including at least: determining, based at least in part on the received information, that the at least one measurement report was not transmitted by the user equipment for the at least one target primary cell of a secondary cell group of a target secondary node that is detectable by the user equipment when the secondary radio link failure occurs in the user equipment; The computer program product of any one of claims 27 to 32, wherein adjusting the at least one parameter comprises adjusting the at least one parameter based at least in part on the determination.

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