Mobility procedures in dual connectivity scenarios

Abstract

In some example embodiments, there may be provided a method comprising: transmitting, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of the apparatus for a Master Cell Group (MCG) mobility procedure, based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured, transmitting, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure, performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.

Description

[0001] Mobility Procedures in Dual Connectivity Scenarios

[0002] FIELD

[0003] Various example embodiments relate to the field of wireless communication and, in particular to mobility procedures and / or to mobility procedures for dual connectivity scenarios.

[0004] BACKGROUND

[0005] In the field of wireless communication, mobility management concept(s) exist which include mobility procedures, such as for example Lower Layer Triggered Mobility (LTM) or Layer 1 (L1) / Layer2 (L2) Triggered Mobility. These may include a cell transitions or switch processes, in particular where an apparatus', e.g. a User Equipment's (UE), serving cell may be switched, e.g. to at least one candidate cell or target cell. A User Equipment (UE) may support one or more capabilities for mobility procedures. The UE may be configured for Dual Connectivity (DC) and support the one or more UE-capabilities for Master Cell Group (MCG) mobility procedures and / or Secondary Cell Group (SCG) mobility procedures. A Master Node (MN) and a Secondary Node (SN) may, in particular independently configure, a mobility procedure. However, the MN may not make use of the one or more UE-capabilities, because it may be unaware if the SN is (already) using them and / or how many the SN is using for SCG mobility procedures. In addition or alternatively, the SN may not make use of the one or more UE-capabilities, because it may be unaware if the MN is (already) using them and / or how many the MN is using for MCG mobility procedures. It may beneficial, e.g. among other things, to address at least some of these issues and / or to enable, among other things, that the UE-capabilities to be used more efficiently and / or more targeted / focused.

[0006] SUMMARY

[0007] According to some aspects, there is provided the subject matter of the independent claims. Some further aspects, advantages and / or features are defined in the dependent claims, the description and / or the accompanying drawings.

[0008] In a first example aspect, there may be provided an apparatus, comprising:

[0009] at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:

[0010] transmitting, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of the apparatus for a Master Cell Group (MCG) mobility procedure,

[0011] based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured,

[0012] transmitting, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure,

[0013] performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.

[0014] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect described herein, wherein the at least one first indication further indicates support for the SCG mobility procedure.

[0015] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein at least the first set of mobility capabilities of the apparatus is exchanged between the MN and the SN.

[0016] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus and the second set of mobility capabilities of the apparatus are at least one of: coordinated or shared between the MN and the SN.

[0017] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus occupies a number of cells of the MCG.In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus includes at least one limitation that applies within at least one cell of the MCG.

[0018] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication indicates a maximum number of cells of the SCG available for the second set of mobility capabilities of the apparatus.

[0019] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is included in or corresponds to a measurement report, wherein the measurement report is an event-based measurement report, wherein the measurement report is a Layer 1 (L1) measurement report or a Layer 3 (L3) measurement report.

[0020] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on determining that an event criterion for at least one of: the MCG cell change procedure or the SCG cell change procedure is fulfilled.

[0021] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is included in or corresponds to a Layer 2 (L2) or a Layer 3 (L3) message.

[0022] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the second set of mobility capabilities of the apparatus for the SCG mobility procedure is determined based at least in part on available mobility capabilities of the apparatus and the first set of mobility capabilities of the apparatus already assigned to the MCG mobility procedure.In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one processor; and the at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:

[0023] transmitting, to the MN, at least one third indication that indicates a third set of mobility capabilities of the apparatus for the MCG mobility procedure, wherein the third indication is transmitted after the SCG mobility procedure.

[0024] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is in a Dual Connectivity (DC) mode, wherein the MN and the SN are serving nodes of the apparatus, wherein the apparatus is simultaneously configured with the MCG mobility procedure and the SCG mobility procedure.

[0025] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the mobility capabilities of the apparatus are Lower Layer Triggered Mobility (LTM) capabilities.

[0026] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the mobility procedures are Lower Layer Triggered Mobility (LTM) mobility procedures, wherein the mobility procedures are LTM cell change procedures.

[0027] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, event.

[0028] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, 3 event.In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on an A3 event.

[0029] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is a User equipment, UE, or wherein the apparatus is comprised in a UE.

[0030] Furthermore, in particular further according to the first example aspect, there may be provided an apparatus, comprising means for:

[0031] transmitting, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of the apparatus for a Master Cell Group (MCG) mobility procedure,

[0032] based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured,

[0033] transmitting, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure,

[0034] performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.

[0035] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect described herein, wherein the at least one first indication further indicates support for the SCG mobility procedure.

[0036] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein at least the first set of mobility capabilities of the apparatus is exchanged between the MN and the SN.In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus and the second set of mobility capabilities of the apparatus are at least one of: coordinated or shared between the MN and the SN.

[0037] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus occupies a number of cells of the MCG.

[0038] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus includes at least one limitation that applies within at least one cell of the MCG.

[0039] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication indicates a maximum number of cells of the SCG available for the second set of mobility capabilities of the apparatus.

[0040] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is included in or corresponds to a measurement report, wherein the measurement report is an event-based measurement report, wherein the measurement report is a Layer 1 (L1) measurement report or a Layer 3 (L3) measurement report.

[0041] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on determining that an event criterion for at least one of: the MCG cell change procedure or the SCG cell change procedure is fulfilled.In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is included in or corresponds to a Layer 2 (L2) or a Layer 3 (L3) message.

[0042] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the second set of mobility capabilities of the apparatus for the SCG mobility procedure is determined based at least in part on available mobility capabilities of the apparatus and the first set of mobility capabilities of the apparatus already assigned to the MCG mobility procedure.

[0043] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the means are configured for:

[0044] transmitting, to the MN, at least one third indication that indicates a third set of mobility capabilities of the apparatus for the MCG mobility procedure, wherein the third indication is transmitted after the SCG mobility procedure.

[0045] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is in a Dual Connectivity (DC) mode, wherein the MN and the SN are serving nodes of the apparatus, wherein the apparatus is simultaneously configured with the MCG mobility procedure and the SCG mobility procedure.

[0046] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the mobility capabilities of the apparatus are Lower Layer Triggered Mobility (LTM) capabilities.

[0047] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the mobility procedures are Lower Layer Triggered Mobility (LTM) mobility procedures, wherein the mobility procedures are LTM cell change procedures.In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, event.

[0048] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, 3 event.

[0049] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on an A3 event.

[0050] In an example embodiment, there is provided an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is a User equipment, UE, or wherein the apparatus is comprised in a UE.

[0051] In a second example aspect, there may be provided a method, comprising:

[0052] transmitting, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of an apparatus for a Master Cell Group (MCG) mobility procedure,

[0053] based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured,

[0054] transmitting, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure,

[0055] performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.In an example embodiment, there is provided a method, in particular according to the second example aspect described herein, wherein the at least one first indication further indicates support for the SCG mobility procedure.

[0056] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein at least the first set of mobility capabilities of the apparatus is exchanged between the MN and the SN.

[0057] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus and the second set of mobility capabilities of the apparatus are at least one of: coordinated or shared between the MN and the SN.

[0058] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus occupies a number of cells of the MCG.

[0059] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the apparatus includes at least one limitation that applies within at least one cell of the MCG.

[0060] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication indicates a maximum number of cells of the SCG available for the second set of mobility capabilities of the apparatus.

[0061] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is included in or corresponds to a measurement report, wherein the measurement report is an event-based measurement report, wherein themeasurement report is a Layer 1 (L1) measurement report or a Layer 3 (L3) measurement report.

[0062] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on determining that an event criterion for at least one of: the MCG cell change procedure or the SCG cell change procedure is fulfilled.

[0063] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is included in or corresponds to a Layer 2 (L2) or a Layer 3 (L3) message.

[0064] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the second set of mobility capabilities of the apparatus for the SCG mobility procedure is determined based at least in part on available mobility capabilities of the apparatus and the first set of mobility capabilities of the apparatus already assigned to the MCG mobility procedure.

[0065] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the method comprises:

[0066] transmitting, to the MN, at least one third indication that indicates a third set of mobility capabilities of the apparatus for the MCG mobility procedure, wherein the third indication is transmitted after the SCG mobility procedure.

[0067] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is in a Dual Connectivity (DC) mode, wherein the MN and the SN are serving nodes of the apparatus, wherein the apparatus is simultaneously configured with the MCG mobility procedure and the SCG mobility procedure.In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the mobility capabilities of the apparatus are Lower Layer Triggered Mobility (LTM) capabilities.

[0068] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the mobility procedures are Lower Layer Triggered Mobility (LTM) mobility procedures, wherein the mobility procedures are LTM cell change procedures.

[0069] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, event.

[0070] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, 3 event.

[0071] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is transmitted based on an A3 event.

[0072] In an example embodiment, there is provided a method, in particular according to the second example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is a User equipment, UE, or wherein the apparatus is comprised in a UE.

[0073] In a third example aspect, there may be provided a non-transitory computer readable storage medium comprising program instructions that, when executed by an apparatus, in particular according to the first example aspect and / or any one of the associated example embodiments described herein, causes operations comprising:transmitting, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of an apparatus for a Master Cell Group (MCG) mobility procedure,

[0074] based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured,

[0075] transmitting, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure,

[0076] performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.

[0077] The third example aspect may further comprise one or more steps and / or features of the method and / or any one of the associated example embodiments recited in the second example aspect.

[0078] In a fourth example aspect, there may be provided an apparatus, in particular a Master Node (MN) of a network, comprising:

[0079] at least one processor; and

[0080] at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:

[0081] receiving, at least one first indication that indicates a first set of mobility capabilities of a User Equipment (UE) for a Master Cell Group (MCG) mobility procedure,

[0082] transmitting at least one second indication which indicates a second set of mobility capabilities of the UE for a SCG mobility procedure to a Secondary Node (SN) of the network.

[0083] In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect, wherein the at least one first indication indicates support for the SCG mobility procedure.

[0084] In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one first indication is received from the UE.In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is further caused to:

[0085] determining, based on the first set of mobility capabilities of the UE for the MCG mobility procedure, the at least one second set of mobility capabilities of the UE which the SN is allowed to configure for the SCG mobility procedure.

[0086] In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication indicates a maximum number of cells of the SCG available for the second set of mobility capabilities of the UE.

[0087] In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect, and / or any one of the associated example embodiments described herein, wherein the apparatus is further caused at least to perform:

[0088] receiving, from the SN of the network, at least one message, in particular an acknowledgment message, that indicates that the at least one second indication was received.

[0089] In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one first indication and / or the at least one second indication is further transmitted to at least one candidate MN.

[0090] In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the UE and the second set of mobility capabilities of the UE are at least one of: exchanged, coordinated or shared between the MN and the SN.

[0091] In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect and / or any one of the associated example embodiments described herein, wherein the first set of mobility capabilities of the UE occupies a number of cells of the MCG.

[0092] In an example embodiment, there is provided an apparatus, in particular according to the fourth example aspect and / or any one of the associated example embodiments described herein,wherein the first set of mobility capabilities of the UE includes at least one limitation that applies within at least one cell of the MCG.

[0093] In a fifth example aspect, there may be provided an apparatus, in particular a Secondary Node (SN) of a network, comprising:

[0094] at least one processor; and

[0095] at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:

[0096] receiving, from a Master Node (MN) of the network, at least one first indication that indicates a set of mobility capabilities of a User Equipment (UE) for a Secondary Cell Group (SCG) mobility procedure,

[0097] transmitting at least one second indication which indicates the set of mobility capabilities of the UE for the SCG mobility procedure to at least one candidate SN of the network.

[0098] In an example embodiment, there is provided an apparatus, in particular according to the fifth example aspect, wherein the set of mobility capabilities of the UE corresponds to mobility capabilities which the SN is allowed to configure.

[0099] In an example embodiment, there is provided an apparatus, in particular according to the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is further caused at least to perform:

[0100] determining, based on the set of mobility capabilities of the UE for the SCG mobility procedure, to configure the SCG mobility procedure.

[0101] In an example embodiment, which may be referred to as a first example embodiment of the fifth example aspect, there is provided an apparatus, in particular according to the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is further caused at least to perform:

[0102] based at least in part on the SCG mobility procedure being configured, receiving, at least one third indication that indicates a third set of mobility capabilities of the UE for the SCG mobility procedure.In an example embodiment, there is provided an apparatus, in particular according to the first example embodiment of the fifth example aspect described herein, wherein the at least one third indication is received from or transmitted by the UE.

[0103] In an example embodiment, there is provided an apparatus, in particular according to the first example embodiment of the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one third indication indicates a maximum number of cells of the SCG available for the third set of mobility capabilities of the UE.

[0104] In an example embodiment, there is provided an apparatus, in particular according to the first example embodiment of the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one third indication is included in or corresponds to a measurement report, wherein the measurement report is an event-based measurement report, wherein the measurement report is a Layer 1 (L1) measurement report or a Layer 3 (L3) measurement report.

[0105] In an example embodiment, there is provided an apparatus, in particular according to the first example embodiment of the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one third indication is transmitted based on determining that an event criterion for at least one of: the MCG cell change procedure or the SCG cell change procedure is fulfilled.

[0106] In an example embodiment, there is provided an apparatus, in particular according to the first example embodiment of the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one third indication is included in or corresponds to a Layer 2 (L2) or a Layer 3 (L3) message.

[0107] In an example embodiment, there is provided an apparatus, in particular according to the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the UE is exchanged between the MN and the SN.

[0108] In an example embodiment, there is provided an apparatus, in particular according to the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is further caused at least to perform:transmitting, to the MN of the network, at least one message, in particular an acknowledgment message, that indicates that the at least one first indication was received.

[0109] In an example embodiment, there is provided an apparatus, in particular according to the fifth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication is further transmitted to at least one candidate SN.

[0110] In a sixth example aspect, there may be provided an apparatus, comprising:

[0111] at least one processor; and

[0112] at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:

[0113] transmitting, to a Master Node (MN) of a network, at least one indication that indicates a set of mobility capabilities of the apparatus, wherein the at least one indication indicates support fora Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure,

[0114] performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the set of mobility capabilities.

[0115] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect, wherein the at least one indication further indicates support for a MCG mobility procedure and a SCG mobility procedure being configured simultaneously.

[0116] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one indication further indicates a first set of mobility capabilities of the set of mobility capabilities of the apparatus available for the MCG mobility procedure.

[0117] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one indication further indicates a second set of mobility capabilities of the set of mobility capabilities of the apparatus available for the SCG mobility procedure.

[0118] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein,wherein the set of mobility capabilities of the apparatus includes all available mobility capabilities of the apparatus.

[0119] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the apparatus is exchanged between the MN and a Secondary Node (SN).

[0120] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the apparatus is at least one of: coordinated or shared between the MN and the SN.

[0121] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is in a Dual Connectivity (DC) mode.

[0122] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein mobility capabilities of the apparatus are Lower Layer Triggered Mobility (LTM) capabilities.

[0123] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the mobility procedures are Lower Layer Triggered Mobility (LTM) mobility procedures, wherein the mobility procedures are LTM cell change procedures.

[0124] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is a User equipment, UE, or wherein the apparatus is comprised in a UE.

[0125] Furthermore, in particular further according to the sixth example aspect, there may be provided an apparatus, comprising means for:transmitting, to a Master Node (MN) of a network, at least one indication that indicates a set of mobility capabilities of the apparatus, wherein the at least one indication indicates support fora Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure,

[0126] performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the set of mobility capabilities.

[0127] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect, wherein the at least one indication further indicates support for a MCG mobility procedure and a SCG mobility procedure being configured simultaneously.

[0128] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one indication further indicates a first set of mobility capabilities of the set of mobility capabilities of the apparatus available for the MCG mobility procedure.

[0129] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one indication further indicates a second set of mobility capabilities of the set of mobility capabilities of the apparatus available for the SCG mobility procedure.

[0130] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the apparatus includes all available mobility capabilities of the apparatus.

[0131] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the apparatus is exchanged between the MN and a Secondary Node (SN).

[0132] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein,wherein the set of mobility capabilities of the apparatus is at least one of: coordinated or shared between the MN and the SN.

[0133] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is in a Dual Connectivity (DC) mode.

[0134] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein mobility capabilities of the apparatus are Lower Layer Triggered Mobility (LTM) capabilities.

[0135] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the mobility procedures are Lower Layer Triggered Mobility (LTM) mobility procedures, wherein the mobility procedures are LTM cell change procedures.

[0136] In an example embodiment, there is provided an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is a User equipment, UE, or wherein the apparatus is comprised in a UE.

[0137] In a seventh example aspect, there may be provided a method, comprising:

[0138] transmitting, to a Master Node (MN) of a network, at least one indication that indicates a set of mobility capabilities of an apparatus, wherein the at least one indication indicates support fora Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure,

[0139] performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the set of mobility capabilities.

[0140] In an example embodiment, there is provided a method, in particular according to the seventh example aspect, wherein the at least one indication further indicates support for a MCG mobility procedure and a SCG mobility procedure being configured simultaneously.In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein the at least one indication further indicates a first set of mobility capabilities of the set of mobility capabilities of the apparatus available for the MCG mobility procedure.

[0141] In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein the at least one indication further indicates a second set of mobility capabilities of the set of mobility capabilities of the apparatus available for the SCG mobility procedure.

[0142] In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the apparatus includes all available mobility capabilities of the apparatus.

[0143] In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the apparatus is exchanged between the MN and a Secondary Node (SN).

[0144] In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the apparatus is at least one of: coordinated or shared between the MN and the SN.

[0145] In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is in a Dual Connectivity (DC) mode.

[0146] In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein mobility capabilities of the apparatus are Lower Layer Triggered Mobility (LTM) capabilities.In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein the mobility procedures are Lower Layer Triggered Mobility (LTM) mobility procedures, wherein the mobility procedures are LTM cell change procedures.

[0147] In an example embodiment, there is provided a method, in particular according to the seventh example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is a User equipment, UE, or wherein the apparatus is comprised in a UE.

[0148] In an eighth example aspect, there may be provided a non-transitory computer readable storage medium comprising program instructions that, when executed by an apparatus, in particular according to the sixth example aspect and / or any one of the associated example embodiments described herein, causes operations comprising:

[0149] transmitting, to a Master Node (MN) of a network, at least one indication that indicates a set of mobility capabilities of an apparatus, wherein the at least one indication indicates support fora Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure,

[0150] performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the set of mobility capabilities.

[0151] The eighth example aspect may further comprise one or more steps and / or features of the method and / or any one of the associated example embodiments recited in the seventh example aspect.

[0152] In a ninth example aspect, there may be provided an apparatus, in particular a Master Node (MN) of a network, comprising:

[0153] at least one processor; and

[0154] at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:

[0155] receiving, at least one first indication that indicates a set of mobility capabilities of a User Equipment (UE), wherein the at least one first indication indicates support for a Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure,transmitting at least one second indication which indicates a set of mobility capabilities of the UE for the SCG mobility procedure to a Secondary Node (SN) of the network.

[0156] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect, wherein the at least one first indication indicates support for the MCG mobility procedure and the SCG mobility procedure being configured simultaneously.

[0157] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one indication further indicates a first set of mobility capabilities of the set of mobility capabilities of the UE available for the MCG mobility procedure.

[0158] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one indication further indicates a second set of mobility capabilities of the set of mobility capabilities of the UE available for the SCG mobility procedure.

[0159] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the UE includes all available mobility capabilities of the UE.

[0160] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect and / or any one of the associated example embodiments described herein, wherein the apparatus is further caused to:

[0161] determining, based on the set of mobility capabilities of the UE, the at least one set of mobility capabilities of the UE for the SCG mobility procedure which the SN is allowed to configure for the SCG mobility procedure.

[0162] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one second indication indicates a maximum number of cells of the SCG available for the set of mobility capabilities of the UE for the SCG mobility procedure.In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect, and / or any one of the associated example embodiments described herein, wherein the apparatus is further caused at least to perform:

[0163] receiving, from the SN of the network, at least one message, in particular an acknowledgment message, that indicates that the at least one second indication was received.

[0164] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect and / or any one of the associated example embodiments described herein, wherein the at least one first indication and / or the at least one second indication is further transmitted to at least one candidate MN.

[0165] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the UE is exchanged between the MN and the SN.

[0166] In an example embodiment, there is provided an apparatus, in particular according to the ninth example aspect and / or any one of the associated example embodiments described herein, wherein the set of mobility capabilities of the UE is at least one of: coordinated or shared between the MN and the SN.

[0167] BRIEF DESCRIPTION OF THE DRAWINGS

[0168] Some example embodiments will now be described with reference to the accompanying drawings.

[0169] A full and enabling disclosure to one of ordinary skill in the art is set forth more particularly in the remainder of the specification including reference to the accompanying drawings wherein:

[0170] FIG. 1 shows an example signaling according to subject-matter described herein;

[0171] FIG. 2 shows an example signaling according to subject-matter described herein;

[0172] FIG. 3 shows an example signaling according to subject-matter described herein;Fig. 4A shows an example signaling according to subject-matter described herein;

[0173] Fig. 4B shows an example signaling according to subject-matter described herein;

[0174] Fig. 5 shows a flow chart of an example aspect of the subject-matter described herein, and

[0175] Fig. 6 shows a flow chart of an example aspect of the subject-matter described herein.

[0176] DETAILED DESCRIPTION

[0177] Reference will now be made in detail to the various embodiments, one or more examples of which are illustrated in the figures. Within the following description of the drawings, the same reference numbers may refer to same components. Generally, only the differences with respect to individual embodiments may be described. Each example may be provided by way of explanation and is not meant as a limitation. Further, features illustrated or described as part of one embodiment can be used on or in conjunction with other embodiments to yield yet a further embodiment. It is intended that the description includes such modifications and variations.

[0178] The drawings are schematic drawings which are not drawn to scale. Some elements in the drawings may have dimensions which are exaggerated for the purpose of highlighting aspects of the present disclosure and / or for the sake of clarity of presentation.

[0179] A "mobility procedure" may be regarded as or may refer to a process of transitioning an apparatus, in particular a User Equipment (UE), from one network entity (e.g. a cell, beam, or access point) to another network entity, in particular to maintain seamless connectivity. Mobility may be to ensure uninterrupted communication as users move across different coverage areas. It may prevent call drops and / or data session interruptions. Mobility procedures may also be referred to as cell transition procedures. Non-limiting examples for mobility procedures are handovers (HO), which may occur in a higher layer(s), e.g. Layer 3 (L3) and / or cell switches, which may occur in lower layers, e.g. Layer 1 (L1) / Layer2 (L2)." Lower Layer Triggered Mobility” "(LTM) or " Layer 1 (L1) / Layer2 (L2) Triggered Mobility" may refer to a particular mobility procedure, e.g. initiated in a cellular network based on events and / or measurements detected at lower layers of a protocol stack - for example, a physical layer or Layer 1 and / or a data link layer or Layer 2 etc. LTM may provide mechanisms, e.g. for a network node and User Equipment (UE), to address mobility needs, complementing, e.g., higher-layer (e.g. Layer 3 or Radio Resource Control (RRC)) mobility processes. LTM may include a cell switch procedure, e.g. where a UE's serving cell (for example a Primary Cell (PCell), PSCell, or a Secondary Cell (SCell)) may be switched, e.g. by a network node, for example by sending a message, e.g. a cell switch command or LTM cell switch command. An LTM switch command may be assumed to be delivered by Medium Access Control (MAC) signaling, in particular using a MAC Control Element (CE). Hence, not using RRC signaling as a L3 based handover may be a method for changing between cells.

[0180] A LTM cell switch-decision may be based on measurements (for example L1 measurements) that may be performed and / or reported (for example via a corresponding L1 measurement report), e.g. by the UE. A LTM cell switch decision may be based on measurements (for example L1 measurements) that may be performed and / or reported, e.g. by the UE. Measurements and / or reporting may be based on LTM candidate cell configuration provided by the network for one or more LTM candidate cells. An LTM candidate cell may be neighboring cell(s) ora UE’s current serving cells (e.g. SCells). LTM measurements, e.g. on a neighboring candidate cell may be performed using Synchronization Signal Blocks (SSBs), e.g. transmitted by the candidate cell for which the SSB configuration is provided to the UE.

[0181] Before the cell switch, the network may optionally activate one or more TCI state(s) for one or more candidate cells. Once a candidate cell TCI state is activated the UE may start tracking the time / frequency synchronization, e.g. using the reference signals associated with the activated TCI state(s). The UE may also perform early UL synchronization before the cell switch, for example if this is requested by the network.

[0182] A general but non-limiting LTM mobility procedure may be described as follows. The apparatus, e.g. the UE, may be connected to a cell, e.g. a serving cell, which may be referred to a connected mode or Radio Resource Control (RRC) connected. The apparatus, e.g. the UE may perform radio measurements on the serving and / or neighboring cell(s) based on its measurement configuration. Then, the apparatus, e.g. the UE may transmit a measurementreport in a message, in particular a Measurement Report message, to the base station, e.g. gNodeB orgNB. The base station may analyze the measurement report and determine, decide and / or initiate LTM preparation or LTM candidate preparation, for example by selecting candidate cell(s) that the UE can switch to. The base station may transmit a message, in particular a RRC Reconfiguration message to the apparatus, e.g. the UE, which may include at least one mobility configuration, in particular at least one LTM candidate configuration. The mobility configuration may include and / or define a set of potential (one or more) target cell(s) for a future LTM cell switch. The apparatus, e.g. the UE, may store the mobility configuration, e.g. for later use. Then, the apparatus, e.g. the UE, may acknowledge, in particular successful, reception by transmitting an RRCReconfigurationComplete message back to the gNB. Before receiving the actual cell switch command, the apparatus, e.g. the UE, may start, perform or initiate downlink (DL) synchronization with the candidate or target cell(s). This step may ensure that when the cell switch command arrives, the apparatus, e.g. the UE, is already aligned with the candidate cell(s) downlink transmission. Thereafter, the apparatus, e.g. the UE, may perform early Timing Advance (TA) acquisition with the candidate cell(s), e.g. as requested by the network before receiving the cell switch command. Timing Advance (TA) may be required to compensate for the signal propagation delay between the apparatus, e.g. the UE, and the base station. For example, the network may request the apparatus, e.g. the UE, to perform early TA acquisition using Contention-Free Random Access (CFRA) before the switch happens. To do so, the serving cell (source gNB) may transmit a Physical Downlink Control Channel (PDCCH) order to the apparatus, e.g. the UE, instructing / triggering it to transmit a preamble to the indicated target (candidate) cell. The apparatus, e.g. the UE, may transmit the preamble to the indicated target cell. In order to minimize the data interruption of the source cell due to CFRA towards the candidate cell(s), the apparatus, e.g. the UE, may not receive Random Access Response (RAR) from the network. Instead, the Timing Advance (TA) value for the candidate cell may be provided / indicated later in the actual cell switch command. The apparatus, e.g. the UE, may not maintain a TA timer for the candidate cell; instead, it may rely on the network to ensure the validity of the TA. While waiting for a potential cell switch, the apparatus, e.g. the UE may, in particular continuously, perform L1 (Layer 1) measurements on the candidate cells. The apparatus, e.g. the UE, may transmit L1 measurement reports to the gNB, e.g. assisting the network make an informed decision about when and / or where to switch. The apparatus, e.g. the UE, may continue L1 measurements as long as the RRCReconfiguration (s. above) remains valid. Based on the L1 measurement reports, the gNB may decide to switch the apparatus, e.g. the UE, to a new cell. For example, the gNB maydecide to execute a cell switch to a target cell and / or it may transmit a Medium Access Control (MAC) Control Element (CE) triggering cell switch by including a candidate configuration index (ID) of the target cell. The apparatus, e.g. the UE, may switch to the target cell and / or apply the configuration indicated by the candidate configuration index. If the apparatus, e.g. the UE, does not already have a valid TA for the target cell, it may perform a random access (RA) procedure, e.g. before it can fully connect. Once the apparatus, e.g. the UE switches to the target cell and / or it completes the LTM cell switch procedure, it may transmit a message, in particular a RRCReconfigurationComplete message, to the (new) target cell, in particular to confirm the switch. If the apparatus, e.g. the UE, has performed a Random Access (RA) procedure, the apparatus, e.g. the UE, may consider that LTM cell switch execution is successfully completed, in particular when the random access procedure is successfully completed. For RACH-less LTM, the apparatus, e.g. the UE, may consider that LTM cell switch execution is successfully completed, in particular when the apparatus, e.g. the UE determines that the network has successfully received its first Uplink (UL) data. The steps from the DL synchronization onward may be performed multiple times, e.g. for subsequent LTM using the LTM candidate configuration(s) provided in a preceding step. The procedure may also apply to both intra-gNB-DU and inter-gNB-DU mobility. For intra-gNB-DU LTM, the apparatus, e.g. the UE, may switch between cells within the same Distributed Unit (DU), e.g. under the same gNB. For inter-gNB-DU LTM, the apparatus, e.g. the UE may switch between cells that belong to different DUs, possibly even different gNBs. F1-C interface procedures related to LTM may handle signaling and / or mobility management between a CU (Central Unit) and a DU (Distributed Unit).

[0183] The apparatus, e.g. the UE may be configured with / for " Dual Connectivity" (DC) or may be / operating in a DC mode or state. Dual Connectivity (DC) may allow an apparatus, e.g. a User Equipment (UE) to, in particular simultaneously, connect to or be connected with two, in particular different, network nodes, wherein each node may manage / control their own set of cells. This may enhance data throughput, reliability, and / or mobility by allowing the UE to utilize resources from multiple network sources.

[0184] In DC, the apparatus, e.g. the UE, may be, in particular simultaneously, connected to / with

[0185] i) a Master Node (MN), which may be understood as a primary network node and / or a serving node. The MN may be responsible for control and / or mobility management of the apparatus, e.g. the UE and / or it may manage a main connection of theapparatus, e.g. the UE and / or it may handle mobility decisions. The MN may control a number, set, group (or sub-group), cluster and / or a plurality of cells (e.g. a first number of cells) which may be referred to as a Master Cell Group (MCG), and

[0186] ii) a Secondary Node (SN), which may be understood as a secondary network node, a serving node and / or a supplementary node, The SN may provide additional resources to improve performance (e.g., higher data rates, lower latency) and / or additional data capacity. The SN may be added or removed, in particular dynamically, e.g. based on network conditions. The SN may control a number, set, group (or sub-group), cluster and / or a plurality of cells (e.g. a second number of cells) which may be referred to as a Secondary Cell Group (SCG).

[0187] So, for example, an apparatus, e.g. a UE, connected to both MN and SN may have an MCG controlled by the MN and an SCG controlled by an SN. A " Primary Cell" (PCell) may be a, in particular primary, cell in the MCG and a " Primary Secondary Cell" (PSCell) may be a, in particular primary cell, in SCG. When the apparatus, e.g. the UE, operates in Dual Connectivity mode, it may a) maintain an, in particular active, connection with both MN (using MCG) and SN (using SCG), b) exchange data across both MCG and SCG, in particular simultaneously and / or c) perform mobility procedures or cell change procedures (e.g., handovers, or cell changes, in particular LTM cell changes), e.g. for each group.

[0188] In particular, there may be a mobility procedure (e.g. a first mobility procedure), in particular a (e.g. first) LTM mobility procedure, e.g. for a (e.g. first) number of cells within the MCG, which may be referred to as a MCG mobility procedure and / or a LTM MCG mobility procedure. In addition, or alternatively, there may be an associated cell change (e.g. a first cell change), in particular a (e.g. first) LTM cell change, which may be referred to as MCG cell change or MCG LTM cell change. For example, the apparatus, e.g. the UE, may switch from one at least one cell of the MCG or at least one MCG-cell to another cell or another MCG-cell, which may be controlled by the MN. Likewise, there may be a mobility procedure (e.g. a second mobility procedure), in particular a (e.g. second) LTM mobility procedure, e.g. for a (e.g. second) number of cells within the SCG, which may be referred to as a SCG mobility procedure and / or a LTM SCG mobility procedure. In addition or alternatively, there may be an associated cell change (e.g. a second cell change), in particular a (e.g. second) LTM cell change, which may be referred to as SCG cell change or SCG LTM cell change. For example, the apparatus, e.g.the UE, may switch from one at least one cell of the SCG or at least one SCG-cell to another cell or another SCG-cell, which may be controlled by the SN. Note that the numberings "first" / "second etc." may be also reversed or switched.

[0189] In DC mode, the capabilities (one or more) of the apparatus, e.g. the UE, may be shared between the two groups of cells (e.g. MCG / SCG) and / or used for both MCG LTM and SCG LTM. Sharing of the capabilities may occur, in an example implementation, when LTM is configured in / with (both) MCG LTM and SCG LTM, e.g. at the same time. In another example implementation, it may occur when LTM is not configured in / with (both) MCG LTM and SCG LTM, e.g. at the same time. In another example implementation, it may occur if Signaling Radio Bearer 3 (SRB3) is configured.

[0190] The "at least one capability" (e.g. one or more) which may be also referred to as at least one UE-capability may comprise and / or enable, among others, for example:

[0191] a) Early DL synchronization (e.g., number of TCI states that can be activated for a UE);

[0192] b) Early UL synchronization (e.g., number of cells for which early TA acquisition or UE- based TA acquisition can be performed), and / or

[0193] c) Early decoding.

[0194] However, the following table (referred to as Table 1) provides non-limiting examples of the at least one capability (e.g. one or more) or UE-capability, e.g. for LTM, as described herein:Per M FDD- FR1- Parameter TDD FR2

[0195] DIFF DIFF

[0196]

[0197]

[0198] ltm-BeamIndicationJointTCI-r18 Band No N / A N / A Indicates whether the UE supports unified TCI with joint DL / UL

[0199] LTM TCI-state indication for LTM procedure, indicating and

[0200] activating a single joint LTM TCI state in a cell switch

[0201] command.

[0202] This capability comprises the following parameters:

[0203] - maxNumberJointTCI-PerCell-r18 indicates the

[0204] maximum number of configured joint LTM TCI state(s)

[0205] per candidate cell

[0206] - qcl-Resource-r18 indicates of the supported QCL

[0207] source RS in the LTM TCI-state- configuration.

[0208] - maxNumberJointTCI-AcrossCells-r18 indicates index N

[0209] of the maximum number of configured joint DL LTM TCI

[0210] state(s) across candidate cells. The maximum number

[0211] of configured joint LTM TCI state(s) across candidate

[0212] cells is N*8, where A / ={1..128}.

[0213] - maxNumberCells-r18 indicates the maximum number

[0214] of configured cells for joint LTM TCI state(s).

[0215] A UE supporting this feature shall also indicate support of

[0216] unifiedJointTCI-r17 and at least one of ltm-MCG-IntraFreq-r18

[0217] or ltm-SCG-IntraFreq-r18.

[0218] ltm-BeamIndicationSeparateTCI-r18 Band No N / A N / A Indicates whether the UE supports unified TCI with separate

[0219] DL / UL TCI-state indication for LTM procedure and

[0220] indicating / activating a pair of UL / DL TCI-state in a cell switch

[0221] command.

[0222] This capability comprises the following parameters:

[0223] - maxNumberDL-TCI-PerCell-r18 indicates the

[0224] maximum number of configured DL TCI state(s) per

[0225] candidate cell.

[0226] - maxNumberUL-TCI-PerCell-r18 indicates the

[0227] maximum number of configured UL TCI state(s) per

[0228] candidate cell.

[0229]

[0230] - qcl-Resource-r18 indicates the supported QCL source

[0231] RS in the LTM TCI-state configuration.

[0232] - maxNumberDL-TCI-AcrossCells-r18 indicates value N

[0233] of the maximum number of configured separate DL

[0234] LTM TCI state(s) across candidate cells. The maximum

[0235] number of configured separate DL LTM TCI state(s)

[0236] across candidate cells is N*8, where A / ={1..128}.

[0237] - maxNumberUL-TCI-AcrossCells-r18 indicates value N

[0238] of the maximum number of configured separate UL

[0239] LTM TCI state(s) across candidate cells. The maximum

[0240] number of configured separate UL LTM TCI state(s)

[0241] across candidate cells is N*8, where A / ={1..64}.

[0242] - maxNumberCells-r18indicates the maximum number of

[0243] configured cells for separate DL / UL LTM TCI states

[0244] A UE supporting this feature shall also indicate support of

[0245] unifiedSeparateTCI-r17 and at least one of Itm-MCG- lntraFreq-r18 or ltm-SCG-IntraFreq-r18.

[0246] ltm-FastProcessingConfig-r18 Band No N / A N / A Indicates whether the UE supports fast processing of LTM

[0247] candidate cell RRC configuration. This capability signalling

[0248] comprises the following parameters:

[0249] - maxNumberStoredConfigCells-r18 indicates the

[0250] maximum number of serving cell(s) and candidate

[0251] cell(s), including serving SpCell(s), serving SCell(s) in

[0252] MCG and SCG, SpCell in LTM candidate configurations

[0253] and Scell(s) in LTM candidate configurations for MCG

[0254] and SCG, that UE can store the configurations.

[0255] - maxNumberConfigs-r18 represents the maximum

[0256] number of LTM candidate configuration for which the

[0257] UE can perform early ASN.1 decoding and validity

[0258] check, as described in TS 38.133 [5].

[0259] A UE supporting this capability shall also indicate support of

[0260] ltm-MAC-CE-JointTCI-r18 or ltm-MAC-CE-SeparateTCI-r18.

[0261] UE shall set the capability values for maxNumberStoredConfigCells-r18 and maxNumberConfigs- r18 consistently for all bands. These capability values

[0262]

[0263] represent the maximum number across all the supported

[0264] bands.

[0265] NOTE: The conditions for fast processing of an LTM

[0266] candidate cell RRC configuration is defined in

[0267] clause 6.3 in TS 38.133 [5].

[0268] ltm-MAC-CE-JointTCI-r18 Band No N / A N / A Indicates whether the UE supports MAC-CE activated joint

[0269] LTM TCI states.

[0270] This capability comprises the following parameters:

[0271] - qcl-Resource-r18 indicates the supported QCL source

[0272] RS for MAC-CE activated DL / UL LTM TCI states

[0273] configuration.

[0274] - maxNumberJointTCI-PerCell-r18 indicates the

[0275] maximum number of MAC-CE activated joint LTM TCI

[0276] states per candidate cell.

[0277] - maxNumberJointTCI-AcrossCells-r18 indicates the

[0278] maximum number of MAC-CE activated joint LTM TCI

[0279] states across candidate cells and serving cell TCI

[0280] states across serving cells in the band.

[0281] A UE supporting this feature shall also indicate support of Itm- BeamlndicationJointTCI-r18.

[0282] NOTE: The maximum number of MAC-CE activated joint

[0283] TCI states across all servings cells is limited by of

[0284] unifiedJointTCI-r17.

[0285] Itm-MA C- CE-Separate T Cl-r18 Band No N / A N / A Indicates whether the UE supports MAC-CE activated DL / UL

[0286] LTM TCI states.

[0287] This capability comprises the following parameters:

[0288] - qcl-Resource-r18 indicates the supported QCL source

[0289] RS for MAC-CE activated DL / UL LTM TCI states

[0290] configuration.

[0291]

[0292] - maxNumberDL-TCI-PerCell-r18 indicates the

[0293] maximum number of MAC-CE activated DL TCI states

[0294] per candidate cell.

[0295] - maxNumberUL-TCI-PerCell-r18 indicates the

[0296] maximum number of MAC-CE activated UL TCI states

[0297] per candidate cell.

[0298] - maxNumberDL-TCI-AcrossCells-r18 indicates the

[0299] maximum number of MAC-CE activated LTM DL TCI

[0300] states across all candidate cells and serving cell DL TCI

[0301] states across all serving cells.

[0302] - maxNumberUL-TCI-AcrossCells-r18 indicates the

[0303] maximum number of MAC-CE activated UL TCI states

[0304] across all candidate cells and serving cell UL TCI states

[0305] across all serving cells in the band.

[0306] A UE supporting this feature shall also indicate support of Itm- BeamlndicationSeparateTCI-r18.

[0307] The maximum number of MAC-CE activated DL / UL TCI states

[0308] across all servings cells is limited by unifiedSeparateTCI-r17.

[0309] ltm-MCG-lntraFreq-r18 Band No N / A N / A Indicates whether the UE supports intra-frequency LTM for

[0310] MCG with RACH as defined in TS 38.331 [9] and TS 38.321

[0311] [8] without NR-DC configured. UE shall set the capability value

[0312] consistently for all FDD-FR1 bands, all TDD-FR1 bands, all

[0313] TDD-FR2-1 bands and all TDD-FR2-2 bands respectively.

[0314] UE supporting this feature shall also indicate support for Itm- BeamlndicationJointTCI-r18 or Itm- BeamlndicationSeparateTCI-r18.

[0315] ltm-SCG-lntraFreq-r18 Band No N / A N / A Indicates whether the UE supports intra-frequency LTM for

[0316] SCG with RACH as defined in TS 38.331 [9] and TS 38.321

[0317] [8]. UE shall set the capability value consistently for all FDD- FR1 bands, all TDD-FR1 bands, all TDD-FR2-1 bands and all

[0318] TDD-FR2-2 bands respectively.

[0319]

[0320] UE supporting this feature shall also indicate support for Itm- BeamlndicationJointTCI-r18 or Itm- BeamlndicationSeparateTCI-r18.

[0321] rach-EarlyTA-Measurement-r18 Band No N / A N / A Indicates the maximum number of candidate cells for TA

[0322] acquisition based on PDCCH ordered CFRA procedure before

[0323] receiving cell switch command MAC-CE. Power ramping for

[0324] PRACH retransmission based on PDCCH order indication. UE

[0325] also supports dropping the serving cell UL to handle the

[0326] overlap between UL transmission on serving cell(s) and

[0327] PRACH on candidate cell(s).

[0328] A UE supporting this feature shall also indicate support of ta- IndicationCellSwitch-rl 8 and at least one of Itm-MCG- lntraFreq-r18 or ltm-SCG-IntraFreq-r18.

[0329] ue-TA-Measurement-r18 Band No N / A N / A Indicates whether the UE supports UE-based TA

[0330] measurement by indicating the maximum number of

[0331] candidate cells that the UE maintains the TA for.

[0332] A UE supporting this feature shall also indicate the support of

[0333] at least one of ltm-MCG-lntraFreq-r18 or Itm-SCG-lntraFreq- r18.

[0334] interFreqL1-MeasConfig-r18 BC No N / A N / A Indicates whether UE supports inter-frequency L1-RSRP

[0335] measurement and reporting based on SSB(s) of candidate

[0336] cell(s), regardless whether the candidate cell(s) are inside or

[0337] outside of the BC (unless the UE also indicates support of Itm- interFreqL 1-0nlylnBC-r18).

[0338] This capability signalling comprises of the following

[0339] parameters:

[0340] - supportedMaxlntralnterFreqCellsConfig-r18 indicates

[0341] the maximum number of RRC configured candidate

[0342] cells for intra- and inter-frequency L1-RSRP

[0343] measurement;

[0344] - supportedMaxlntralnterFreqCellsPerReport-r18

[0345] indicates maximum number of candidate cells in one

[0346] report where a SSBRI-RSRP pair is used for each

[0347]

[0348] beam report for intra- and inter-frequency L1-RSRP

[0349] measurement;

[0350] - supportedMaxlntralnterFreqBeamsPerCellReports-r18

[0351] indicates maximum number of candidate beams per

[0352] candidate cell in one report where a SSBRI-RSRP pair

[0353] is used for each beam report for intra- and interfrequency L1-RSRP measurement;

[0354] - supportedMaxlntralnterFreqBeamsReports-r18

[0355] indicates maximum number of candidate cells beams in

[0356] total across all cells in one report where a SSBRI-RSRP

[0357] pair is used for each beam report for intra- and interfrequency L1-RSRP measurement;

[0358] UE supporting this feature shall also indicate support of

[0359] intraFreqL 1-MeasConfig-r18.

[0360] interFreqSSB-L1-MeasWithoutGaps-r18 BC No N / A N / A Indicates whether UE supports SSB based inter-frequency L1- RSRP measurements on SSBs within active DL BWP without

[0361] measurement gaps (without interruption on serving cell(s)) for

[0362] LTM.

[0363] UE supporting this feature shall also indicate support of

[0364] interFreqL1-MeasConfig-r18.

[0365] maxFreqLayersL1-Meas-r18 BC No N / A N / A Indicates the number of frequency layers for L1-RSRP

[0366] measurement.

[0367] This capability signalling comprises of the following

[0368] parameters:

[0369] - supportedMaxIntralnterFreqLayers WithoutGaps-r18

[0370] indicates the maximum number of frequency layers UE

[0371] can measure for intra- and inter-frequency without

[0372] measurement gaps L1-RSRP measurement.

[0373] A UE indicating support for this component shall also

[0374] indicate support for intraFreqLI -MeasConfig-r18 and / or

[0375] interFreqSSB-L1-MeasWithoutGaps-r18.

[0376] supportedMaxInterFreqLayers With Gaps-r18

[0377] indicates the maximum number of frequency layers UE can

[0378] measure for inter-frequency L1-RSRP measurement with

[0379] measurement gaps. A UE indicating support for this

[0380]

[0381] component shall also indicate support for Itm- InterFreqMeas Gap-r18.

[0382] maxNeigh CellsPerFreqLayerL 1 -Meas-r18 BC No N / A N / A Indicates the number of neighbouring cells per frequency layer

[0383] for L1-RSRP measurement.

[0384] This capability signalling comprises of the following

[0385] parameters:

[0386] - supportedMaxNeighCellsPerFreqLayersWithoutGaps- r18 indicates the max number of neighbor cells UE can

[0387] measure for L1-RSRP per frequency layer for intrafrequency or inter-frequency without measurement

[0388] gaps.

[0389] A UE indicating support for this component shall also

[0390] indicate support for intraFreqL1-MeasConfig-r18 or

[0391] interFreqSSB-L1-MeasWithoutGaps-r18. supportedMaxNeighCellsPerFreqLayersWithGaps- r18 indicates the max number of neighbour cells UE can

[0392] measure for L1-RSRP per frequency layer for inter-frequency

[0393] with measurement gaps. A UE indicating support for this

[0394] component shall also indicate support for Itm- lnterFreqMeasGap-r18.

[0395] Itm-RA CH-LessCG-r18 UE No No No Indicates whether the UE supports RACH-less LTM with

[0396] configured grant for MCG LTM if the UE indicates support of

[0397] ltm-MCG-lntraFreq-r18 or for SCG LTM if the UE indicates

[0398] support of ltm-SCG-lntraFreq-r18 respectively.

[0399] UE indicating support for this feature shall also indicate

[0400] support of either ltm-BeamlndicationJointTCI-r18 or Itm- BeamlndicationSeparateTCI-r18 for at least one band and

[0401] either ta-lndicationCellSwitch-r18 or ue-TA-Measurement- r18.

[0402] Itm-RA CH-LessDG-r18 UE No No No Indicates whether the UE supports RACH-Less LTM with

[0403] dynamic grant, for MCG LTM if the UE indicates support of

[0404] ltm-MCG-lntraFreq-r18 or for SCG LTM if the UE indicates

[0405] support of ltm-SCG-lntraFreq-r18 respectively.

[0406]

[0407] 1

[0408] UE indicating support for this feature shall also indicate

[0409] support of either ltm-BeamlndicationJointTCI-r18 or Itm- BeamlndicationSeparateTCI-r18 for at least one band and TA

[0410] indication in ta-lndicationCellSwitch-r18 or ue-TA- Measurement-r18.

[0411]

[0412] Table 1: List of one or more capabilities or UE-capabilities

[0413] The apparatus, e.g. the UE, may include a (e.g. maximum) number, set, group (or sub-group), cluster and / or a plurality of capabilities which may be referred to as available capabilities and / or UE-capabilities. The available capabilities of the apparatus, e.g. the UE, may be divided into a number of groups / subgroups and / or sets / subsets, for example in a first set of capabilities, a second set of capabilities, a third set of capabilities etc.

[0414] However, MN and SN do typically not communicate with each other about these capabilities. Contrary thereto, the subject-matter described herein relates to an exchange procedure, a coordination procedure, a matching procedure, an alignment procedure, a sharing procedure and / or an internode procedure in which the capabilities of the apparatus, e.g. the UE, may be allocated, coordinated, shared and / or matched, in particular between network nodes, e.g. MN / SN, and the apparatus, e.g. the UE.

[0415] As described herein, the apparatus, e.g. the UE, may provide its or a number of, in particular maximum, capabilities (e.g. as in Table 1), in particular for supporting cell change(s) of the network, e.g. i) (only) to the MN, in particular collectively, combined, together, jointly and / or bundled, or ii) both to the MN and SN, in particular individually, separately and / or discretely. This may avoid, for example when the MN and / or the SN allocate the maximum configuration, in particular simultaneously, to exceed the UE’s capability limit. This may allow the MN and / or SN to not over-allocate UE’s resources / capabilities (e.g., early UL / DL synchronization, early decoding etc.). MN and SN can coordinate, ensuring that resources / capabilities are assigned in a balanced way, which may prevent redundant configurations and / or ensure that UE’s processing power and / or radio resources are used efficiently. For example, coordination may be done, in particular by having the MN transmit the parameter(s) that SN can configured for the SCG mobility configuration. In a non-limiting example, this may be done using at least one Information Element (IE), for example CG-Configlnfo in TS 38.331. In a non-limiting example,the IE in the CG-Configlnfo in TS38.331 is reproduced below, in which it may be included / defined as:

[0416] -- ASN1 START

[0417] -- TAG-CG-CONFIG- INFO-START

[0418] CG-Configlnfo:: = SEQUENCE {

[0419] criticalExtensions CHOICE {

[0420] cl CHOICE {

[0421] cg-Conf iglnfo CG-Conf iglnfo- IEs,

[0422] spare3 NULL, spare2 NULL, spare1 NULL

[0423] },

[0424] criticalExtensionsFuture SEQUENCE { }

[0425] CG-Conf iglnfo-IEs:: = SEQUENCE {

[0426] ue-CapabilityInfo OCTET STRING (CONTAINING UE-CapabilityRAT-ContainerList) OPTIONAL, -- Cond SN-AddMod

[0427] candidateCellInfoListMN MeasResultList2NR OPTIONAL,

[0428] candidateCellInfoListSN OCTET STRING (CONTAINING MeasResultList2NR) OPTIONAL,

[0429] measResultCellListSFTD-NR MeasResultCellListSFTD-NR OPTIONAL,

[0430] scgFailureInfo SEQUENCE {

[0431] failureType ENUMERATED { t310-Expiry, randomAccessProblem,

[0432] rlc-MaxNumRetx, synchReconf igFailure-SCG, scg-reconfigFailure,

[0433] srb3-IntegrityFailure },measResultSCG OCTET STRING (CONTAINING MeasResultSCG-Failure)} OPTIONAL,configRestrictInfo ConfigRestrictInfoSCG OPTIONAL,

[0434] drx-InfoMCG DRX-Info OPTIONAL,measConfigMN MeasConfigMN OPTIONAL,sourceConfigSCG OCTET STRING (CONTAINING RRCReconfiguration) OPTIONAL,

[0435] scg-RB-Config OCTET STRING (CONTAINING RadioBearerConfig) OPTIONAL,

[0436] mcg-RB-Config OCTET STRING (CONTAINING RadioBearerConfig) OPTIONAL,

[0437] mrdc-AssistanceInfo MRDC-AssistanceInfo OPTIONAL,

[0438] nonCriticalExtension CG-ConfigInfo-v1540-IEs OPTIONALCG-ConfigInfo-v1540-IEs ::= SEQUENCE {

[0439] ph-InfoMCG PH-TypeListMCG OPTIONAL,measResultReportCGI SEQUENCE {

[0440] ssbFrequency ARFCN-ValueNR,

[0441] cellForWhichToReportCGI PhysCellId,

[0442] cgi-Info CGI-InfoNR

[0443] } OPTIONAL,nonCriticalExtension CG-ConfigInfo-v1560-IEs OPTIONAL

[0444] }

[0445] CG-ConfigInfo-v1560-IEs ::= SEQUENCE {

[0446] candidateCellInfoListMN-EUTRA OCTET STRING OPTIONAL,candidateCellInfoListSN-EUTRA OCTET STRING OPTIONAL,

[0447] sourceConfigSCG-EUTRA OCTET STRING OPTIONAL,scgFailureInfoEUTRA SEQUENCE {

[0448] failureTypeEUTRA ENUMERATED { t313-Expiry, randomAccessProblem,rlc-MaxNumRetx, scg-ChangeFailure},measResultSCG-EUTRA OCTET STRING

[0449] } OPTIONAL,drx-ConfigMCG DRX-Config OPTIONAL,measResultReportCGI-EUTRA SEQUENCE {

[0450] eutraFrequency ARFCN-ValueEUTRA,

[0451] cellForWhichToReportCGI-EUTRA EUTRA-PhysCellId,

[0452] cgi-InfoEUTRA CGI-InfoEUTRA

[0453] } OPTIONAL,measResultCellListSFTD-EUTRA MeasResultCellListSFTD-EUTRA OPTIONAL,

[0454] fr-InfoListMCG FR-InfoList OPTIONAL,nonCriticalExtension CG-ConfigInfo-v1570-IEs OPTIONAL

[0455] }

[0456] CG-ConfigInfo-v1570-IEs ::= SEQUENCE {

[0457] sftdFrequencyList-NR SFTD-FrequencyList-NR OPTIONAL,

[0458] sftdFrequencyList-EUTRA SFTD-FrequencyList-EUTRA OPTIONAL,

[0459] nonCriticalExtension CG-ConfigInfo-v1590-IEs OPTIONAL

[0460] }

[0461] CG-ConfigInfo-v1590-IEs ::= SEQUENCE {

[0462] servFrequenciesMN-NR SEQUENCE (SIZE (1.. maxNrofServingCells-1)) OF ARFCN-ValueNR OPTIONAL,nonCriticalExtension CG-ConfigInfo-v1610-IEs OPTIONAL

[0463] }

[0464] CG-ConfigInfo-v1610-IEs ::= SEQUENCE {

[0465] drx-InfoMCG2 DRX-Info2 OPTIONAL,alignedDRX-Indication ENUMERATED {true} OPTIONAL,

[0466] scgFailureInfo-r16 SEQUENCE {

[0467] failureType-r16 ENUMERATED { scg-lbtFailure-r16, beamFailureRecoveryFailure-r16,

[0468] t312-Expiry-r16, bh-RLF-r16, beamFailure-r17, spare3, spare2, spare1},

[0469] measResultSCG-r16 OCTET STRING (CONTAINING MeasResultSCG-Failure)} OPTIONAL,dummy1 SEQUENCE {

[0470] failureTypeEUTRA-r16 ENUMERATED { scg-lbtFailure-r16, beamFailureRecoveryFailure-r16,

[0471] t312-Expiry-r16, spare5,

[0472]

[0473] spare4, spare3, spare2, spare1},

[0474] measResultSCG-EUTRA-r16 OCTET STRING

[0475] } OPTIONAL,sidelinkUEInformationNR-r16 OCTET STRING (CONTAINING SidelinkUEInformationNR-r16) OPTIONAL,

[0476] sidelinkUEInformationEUTRA-r16 OCTET STRING OPTIONAL,

[0477] nonCriticalExtension CG-ConfigInfo-v1620-IEs OPTIONAL

[0478] }

[0479] CG-ConfigInfo-v1620-IEs ::= SEQUENCE {

[0480] ueAssistanceInformationSourceSCG-r16 OCTET STRING (CONTAINING UEAssistanceInformation) OPTIONAL,

[0481] nonCriticalExtension CG-ConfigInfo-v1640-IEs OPTIONAL

[0482] }

[0483] CG-ConfigInfo-v1640-IEs ::= SEQUENCE {servCellInfoListMCG-NR-r16 ServCellInfoListMCG-NR-r16 OPTIONAL,

[0484]

[0485] servCellInfoListMCG-EUTRA-r16 ServCellInfoListMCG-EUTRA-r16 OPTIONAL,nonCriticalExtension CG-ConfigInfo-v1700-IEs OPTIONAL}

[0486] CG-ConfigInfo-v1700-IEs ::= SEQUENCE {

[0487] candidateCellListCPC-r17 CandidateCellListCPC-r17 OPTIONAL,twoPHRModeMCG-r17 ENUMERATED {enabled} OPTIONAL,lowMobil ityEva luationConnectedl nPCel l -r 17 ENUMERATED { enabled} OPT I ONAL, nonCriticalExtension CG-Con f igl nf o-vl 730- IEs OPT IONAL }

[0488] CG-Conf ig In fo-vl 730- IEs:: = SEQUENCE {

[0489] fr l -Carriers-MCG-rl7 INTEGER ( 1.. 32 ) OPTIONAL, f r 2 -Car rier s-MCG-r 17 INTEGER ( 1.. 32 ) OPTIONAL, nonCriticalExtension CG-Con f igl nf o-vl 800- IEs OPT IONAL

[0490] CG-Conf ig In fo-vl 800- IEs:: = SEQUENCE {

[0491] mu sim- GapCon f igl nf o- r 18 MUS IM-GapCon f ig-rl 7 OPT IONAL, musim-CapRes friction In f o-r 18 SEQUENCE {

[0492] musim-CapRes tr iction-rl8 MUSIM-CapRes friction- r 18 OPT I ONAL, musim-CandidateBandLis t- r 18 MUS IM-CandidateBandLis t- rl8 OPT IONAL } OPT IONAL, scpa c-Re fe renceCon f igura tion-rl 8 Re f erence Conf igu rati on-r 18 OPT I ONAL, subsequentCPAC-Candida te s- r 18 Candida teCellListCPC-r 17 OPT I ONAL, n

[0493]

[0494] onCriticalExtension SEQUENCE { } OPT IONAL

[0495] Se rvCe ll InfoLis tMCG-NR-r l 6 SEQUENCE ( S I Z E ( 1.. maxNro f ServingCe ll s ) ) OF Se rvCe ll l nf oXCG-NR-rl 6

[0496] Se rvCe ll Inf oLis tMCG-EUTRA- r 1 6 SEQUENCE ( S I Z E ( 1.. maxNro f ServingCel lsEUTRA) ) OF Se rvCe ll l nf oXCG-EUTRA- r 1 6

[0497] SFTD- FrequencyLis t-NR:: = SEQUENCE ( S I ZE ( 1.. maxCel IS FTD ) ) OF ARFCN-Va lueNR

[0498] SFTD- FrequencyLis t-EUTRA:: = SEQUENCE ( S I ZE ( 1.. maxCel IS FTD ) ) OF ARFCN-Va lueEUTRA

[0499] Conf igRe stri ctl nf oSCG:: = SEQUENCE {

[0500] al lowedBC-Li stMRDC Bandcombina tion In f oLi st OPT IONAL,

[0501] powe rCoordination- FRl SEQUENCE {

[0502] p-maxNR-FRl P-Max OPT IONAL, p-maxEUTRA P-Max OPT IONAL, p-maxUE-FRl P-Max OPT IONAL } OPT IONAL, se rvCe ll IndexRange SCG SEQUENCE {

[0503] lowBound Se rvCe ll Index,

[0504] upBound ServCe ll Index

[0505] } OPT IONAL, -- Cond SN-AddMod

[0506] maxMea sFreqs SCG INTEGER ( 1.. maxMea sFreqsMN ) OPT IONAL,

[0507] dummy INTEGER ( 1.. maxMea s I dentitie sMN ) OPT IONAL,[ [ se le ctedBandEntrie sMNLi st SEQUENCE ( S I ZE ( 1.. maxBandComb ) ) OF SelectedBandEntriesMN OPT IONAL, pdcch-Bl indDetectionSCG INTEGER ( 1.. 15 ) OPT IONAL, maxNumbe rROHC-ContextSes sionsSN INTEGER ( 0.. 16384 ) OPT I ONAL J J, [ [ maxi nt r a FreqMeas Identi tiesSCG INTEGER ( 1.. maxMeas Identi tiesMN ) OPT IONAL, maxi nterFreqMeas Identi tiesSCG INTEGER ( 1.. maxMeas Identi tiesMN ) OPT I ONAL

[0508] p-maxNR-FRl -MCG- r 1 6 P-Max OPT IONAL, powe r Coo rdination- FR2 - rl 6 SEQUENCE { p-maxNR-FR2 -MCG- rl 6 P-Max OPT I ONAL, p-maxNR-FR2 - SCG- rl 6 P-Max OPT I ONAL, p-maxUE-FR2 - rl 6 P-Max OPT IONAL } OPT IONAL, nrdc- PC-mode- FRl -r 16 ENUMERATED { semi-static-mode l, semi -s ta ti c-mode 2, dynamic } OPT IONAL, nrdc- PC-mode- FR2 -r l 6 ENUMERATED { semi-static-mode l, semi -s ta ti c-mode 2, dynamic } OPT IONAL, maxMeas SRS-Re sourceSCG-r 16 INTEGER ( 0.. maxNro fCLI - SRS -Re source s -r 16 ) OPT IONAL, maxMeasCL I -Re sourceSCG-r 16 INTEGER ( 0.. maxNro fCLI -RS S I -Re sour ce s -r 1 6 ) OPT IONAL,

[0509]

[0510] maxNumberEHC-Contexts SN- rl 6 INTEGER ( 0.. 65536 ) OPT IONAL,

[0511] al lowedReducedConf igForOverheating- r 1 6 Ove rhea tingAssi stance OPT IONAL,

[0512] maxTo f f se t- rl 6 T-Of fset-r l 6 OPT IONAL J J,

[0513] [ [

[0514] al lowedReducedConf igForOverheating- r 17 Ove rhea tingAs si stance- r 17 OPT IONAL,

[0515] maxNumberUDC-DRB-r 17 INTEGER ( 0.. 2 ) OPT IONAL, maxNumbe rCPCCandidate s -r 17 INTEGER ( 0.. maxNrofCondCell s - l -rl 7 ) OPT I ONAL J J, [ [ al lowedRe sourceCon f igNRDC- rl 7 ResourceCon f igNRDC- rl 7 O

[0516]

[0517] PT I ONAL J J,al lowe dAggrega tedBandwidthSNLis t- r 17 AllowedAggregatedBandwidthSNLis t- rl 7 OPT I ONAL

[0518] ] J,

[0519] [[maxNumberLTM-CandidatesSCG-r18 INTEGER(0..maxNrofLTM-Configs-r18) OPTIONAL]],

[0520] [[allowedL1-MeasConfigNRDC-r18 L1-MeasConfigNRDC-r18

[0521] OPTIONAL]],

[0522] Se le ctedBandEntriesMN:: = SEQUENCE ( S I Z E ( 1.. maxS imul taneousBands ) ) OF BandEntrylndex

[0523] BandEntrylndex:: = INTEGER ( 0.. maxNro f ServingCel ls )

[0524] PH-TypeLi stMCG:: = SEQUENCE ( S I Z E ( 1.. maxNrof Se rvingCell s ) ) OF PH- In foMCG

[0525] PH- In foMCG:: = SEQUENCE {

[0526] se rvCe 11 Index Se rvCe ll lndex,

[0527] ph-Uplink PH-UplinkCar rierMCG,

[0528] ph- SupplementaryUpl ink PH-UplinkCa r rie rMCG OPT IONAL,

[0529] twoSRS- PUSCH-Repe ti tion- rl 7 ENUMERATED { enabled } OPT I ONAL J J, [ [ twoSRS-Multipanel Scheme- rl 8 ENUMERATED { enabled } OPT I ONAL J J

[0530] PH-UplinkCa rrierMCG:: = SEQUENCE } ph-Type lor3 ENUMERATED { type l, type3 },

[0531] BandCombinationln foLi st:: = SEQUENCE ( S I Z E ( 1.. maxBandComb ) ) OF BandCombina tion ln fo

[0532] BandCombination ln fo:: = SEQUENCE { bandcombination I ndex Bandcombination I ndex, al lowedFea ture Se tsLi st SEQUENCE ( S I ZE ( 1.. maxFea ture Se ts Pe rBand ) ) OF Fe a ture Se tEn try I ndex

[0533]

[0534] } FeatureSetEntrylndex:: = INTEGER ( 1.. maxFea ture Se ts PerBand )DRX- In fo:: = SEQUENCE {

[0535] drx-LongCycleS ta rtOf fset CHOICE {

[0536] ms 10 INTEGER ( 0.. 9 ),

[0537] ms 20 INTEGER ( 0.. 1 9 ),

[0538] ms 32 INTEGER ( 0.. 31 ),

[0539] ms 40 INTEGER ( 0.. 39 ),

[0540] ms 60 INTEGER ( 0.. 59 ),

[0541] ms 64 INTEGER ( 0.. 63 ),

[0542] ms 70 INTEGER ( 0.. 69 ),

[0543] ms 80 INTEGER ( 0.. 7 9 ),

[0544] ms 128 INTEGER ( 0.. 127 ),

[0545] ms 160 INTEGER ( 0.. 159 ),

[0546] ms 256 INTEGER ( 0.. 255 ),

[0547] ms 320 INTEGER ( 0.. 31 9 ),

[0548] ms 512 INTEGER ( 0.. 51 1 ),

[0549] ms 64 0 INTEGER ( 0.. 639 ),

[0550] ms 1024 INTEGER ( 0.. 1023 ),

[0551] ms 1280 INTEGER ( 0.. 127 9 ),

[0552] ms 2048 INTEGER ( 0.. 204 7 ),

[0553] ms 2560 INTEGER ( 0.. 2559 ),

[0554] ms 5120 INTEGER ( 0.. 511 9 ),

[0555] ms 1024 0 INTEGER ( 0.. 10239 )

[0556] },

[0557] shortDRX SEQUENCE {

[0558] drx-ShortCycle ENUMERATED {

[0559] ms2, ms 3, ms 4, ms 5, ms 6, ms 7, ms S, ms l O, ms l 4, ms l 6, ms 20, ms30, ms32,

[0560] ms 35, ms 40, ms 64, ms S O, ms l 28, ms l 60, ms 256, ms 320, ms512, ms 640, spa re 9,

[0561] spare8, spare7, spa re 6, spa re5, spare4, spare 3, spare2, spa re l },

[0562] drx-ShortCycleTime r INTEGER ( 1.. 16 )

[0563] } OPT IONAL }

[0564] DRX- In fo2:: = SEQUENCE {

[0565] drx-onDurationTimer CHOI CE {

[0566] subMil li Seconds INTEGER ( 1.. 31 ),

[0567] mi ll iseconds ENUMERATED {

[0568] ms l, ms 2, ms 3, ms 4, ms 5, ms 6, ms 8, ms l O, ms20, ms 30, ms 40, ms 50, ms 60,

[0569] ms 80, ms l O O, ms 200, ms 300, ms 400, ms 500, ms 600, ms800, ms l O OO, ms l 200,

[0570] ms l 600, spareS, spa re l, spare 6, spare5, spare4, spare3, spare2, spare l }MeasConf igMN:: = SEQUENCE {

[0571] me as ur edFr eque nc ie sMN SEQUENCE ( S I ZE ( 1.. maxMeas FreqsMN ) ) OF NR-Freql n fo OPT IONAL,

[0572] me as GapCon f ig SetupRe lease { GapConf ig } OPT IONAL, gapPurpose ENUMERATED { pe rUE, pe rFRl } OPT IONAL,

[0573] [ [

[0574] me as GapCon f igFR2 SetupRe lease { GapCon fig } OPT IONAL J J,

[0575] [ [

[0576] interEreqNoGap-r l 6 ENUMERATED { true } OPT IONAL J J

[0577] }

[0578] MRDC-As si stance In fo SEQUENCE {

[0579] a f fe ctedCa rrie rFreqCombl nfoLi stMRDC SEQUENCE ( S I Z E ( 1.. maxNro f Combi DC ) ) OF Af fe ctedCarrierFreqCombl nf oMRDC,

[0580] [ [ overheatingAss is tanceSCG-rl 6 OCTET STRING ( CONTAIN ING Ove rhea tingAs si s tance ) OPT I ONAL J J, [ [ overheatingAss is tanceSCG-FR2 -2 - rl 7 OCTET STRING ( CONTAIN ING Overhea tingAs si stance -rl 7 ) OPT I ONAL J J, [ [ a f fe ctedCa rrie rFreqRangeCombLis t- rl 8 Af f ectedCar rier FreqRangeCombLis t- r 18 OPT IONAL, a f fe ctedCa rrie rFreqCombLis t- rl 8 Af f ectedCarrierFreqCombLis t- r 16 OPT IONAL, idc-TDM-As si stance -r 18 I DC-TDM-As sis tance -rl 8 OPT IONAL J J

[0581]

[0582] } Af fe ctedCa rrie rFreqComb ln foMRDC:: = SEQUENCE {

[0583] vi ctimSystemType VictimSystemType,

[0584] inte rf erenceDi re ctionMRDC ENUMERATED ( eutra -nr, nr, othe r, utra -nr-othe r, nr-othe r, spa re 3, spare2, spare l },

[0585] a f fe ctedCa rrie rFreqCombMRDC SEQUENCE {

[0586] a f fe ctedCa rrierFreqCombEUTRA Af fe ctedCa rrie rFreqCombEUTRA OPT IONAL,

[0587] a f fe ctedCa rrie rFreqCombNR Af fe ctedCarrierFreqCombNR

[0588] OPT IONAL

[0589] Vi ctimSystemType SEQUENCE {

[0590] gps ENUMERATED { true } OPT IONAL,glonas s ENUMERATED { true } OPT IONAL,

[0591] bds ENUMERATED { true } OPT IONAL,

[0592] ga li leo ENUMERATED { true } OPT IONAL,

[0593] wlan ENUMERATED { true } OPT IONAL,

[0594] blue tooth ENUMERATED { true } OPT I ONAL

[0595] Af fe ctedCa rrierFreqCombEUTRA SEQUENCE ( S I Z E ( 1.. maxNro fServingCel IsEUTRA) ) OF ARFCN- Va lueEUTRA

[0596] Af fe ctedCa rrierFreqCombNR SEQUENCE ( S I Z E ( 1.. maxNrof Se rvingCell s ) ) OF ARFCN-Va lueNR

[0597] CandidateCe llLis tCPC-rl 7 SEQUENCE ( S I Z E ( 1.. maxFreq ) ) OF CandidateCe llCPC-rl 7

[0598] CandidateCel lCPC- rl 7:: = SEQUENCE { s sbFrequency- r 17 ARFCN-Va lueNR,

[0599]

[0600] candidateCel lLis t- r17 SEQUENCE ( S I ZE ( 1.. maxNro fCondCell s- rl 6 ) ) OF PhysCe ll ld }

[0601] Al lowe dAggregatedBandwidthSNLis t-rl 7 SEQUENCE ( S I Z E ( 1.. maxBandComb ) ) OF Al l owe dAggregatedBandwidth-r 17

[0602] Al lowedAggregatedBandwidth-rl 7:: = SEQUENCE {

[0603] bandCombinationl ndex-r 17 Bandcombina tion Index,

[0604] a llowedAggBW- FDD-DL- rl 7 SupportedAggBandwidth-r 17 OPT IONAL, a llowedAggBW- FDD-UL- rl 7 SupportedAggBandwidth-r 17 OPT IONAL, a llowedAggBW-TDD-DL- rl 7 SupportedAggBandwidth-r 17 OPT IONAL, a llowedAggBW-TDD-UL- rl 7 SupportedAggBandwidth-r 17 OPT IONAL, a llowedAggBW-TotalDL-rl 7 SupportedAggBandwidth-r 17 OPT IONAL, a llowedAggBW-TotalUL-rl 7 SupportedAggBandwidth-r 17 OPT IONAL }

[0605] -- TAG-CG-CONFI G- INFO- STOP

[0606] -- ASN1 STOP

[0607] For the apparatus, the UE, failures from over-allocating and / or high power consumption may be prevented, e.g. efficient allocation of resources based on UE’s actual capabilities may optimize energy usage. Mobility procedures / cell changes / transitions may occur / be performed smoother, as packet loss, increased latency, and / or dropped connections may be prevented, minimized and / or at least reduced. This may ensure a (more) stable connection during mobility procedures.As such, coordination, alignment and / or at least exchange of information between the UE and the MN / SN, e.g. on a number of cells for which the UE-capabilities can be configured towards the UE, in particular for MCG LGM and SCG LTM is beneficial.

[0608] The capabilities of the apparatus, e.g. the UE, shared with the network may be referred to as at least one "exposed capability". An "exposed capability" may refer to number, set, group (or sub-group), cluster and / or a plurality of UE capabilities, which are, in particular explicitly, communicated, coordinated, aligned, visible, exposed and / or shared to / with the network (e.g. the MN and the SN). The exposed capability may represent the UE’s advertised, communicated, shared and / or reported capabilities that the MN and / or SN are aware of and / or that they can utilize, e.g. when configuring a mobility procedure, e.g. LTM, for the MCG and the SCG. This may lead to alignment between the MN and the SN, e.g. on how many cells can be configured using the exposed capabilities for MCG LTM and SCG LTM. When coordinated, the UE and MN / SN may in particular fully, exploit the benefits of the exposed capabilities. This may prevent both nodes from over-allocating UE resources and / or ensure that UE capabilities (e.g., early UL / DL sync, early decoding etc.) are used efficiently.

[0609] Herein, reference to at least one "indication" is made, in particular at least one first / second / third indication etc. The at least one indication may be a flag or pointer which may be included or encoded within, e.g. a message or transmitted / received directly. This may be achieved by using, for example, one or mor bits. The indication may be an explicit indication, e.g. directly readable or it may correspond to "data or information" for determining or deriving the indication, e.g. it may allow the UE to interpret and / or conclude to the indication, e.g. through parameters or control information, e.g. also by using bits. This may be referred to as an implicit indication.

[0610] It should be noted that the indication as recited herein may correspond to at least one indication or the indication may correspond to a single indication having multiple parts. In other words, there may be a first indication or at least a first part of the indication indicating a first information, e.g. at least one capability of the apparatus, e.g. the UE, and a second indication or second part of the indication indicating a second information, e.g. support for a certain type of mobility procedure, e.g. an SCG mobility procedure etc. "based at least in part on" the indication may, for example, mean based on one or more part(s) of the indication. In other cases, it may mean, for example, based on the indication, e.g. as a whole, but also based on additional information and / or additional information element(s), parameters or data.As mentioned above, a (LTM) cell switch decision may be based on L1 measurements, which may be performed and / or reported using L1 measurement reports, for example by the apparatus, e.g. by the UE. Measurements and / or reporting may be based on LTM candidate cell configuration provided by the network for one or more LTM candidate cells.

[0611] A "mobility configuration" may be regarded as a set of network parameters, e.g. provided to the apparatus, e.g. the UE, to guide how it should perform mobility procedures and / or to define how and / or when the apparatus, e.g. the UE, should trigger one or more mobility-related action(s). The mobility configuration may be associated with at least one candidate cell. A mobility configuration may include at least one of: at least one Channel State Information, CSI, resource configuration and / or at least one CSI reporting configuration.

[0612] In an example, the mobility configuration may be a Layer 1, L1, measurement configuration. In an example, the mobility configuration may be a serving cell beam reporting configuration and the at least one candidate cell may be a serving cell. In such an example, the mobility reporting may be focused on beam(s) of the serving cell rather than measuring and / or reporting only entire cells. For example, the UE may track multiple beams from the same serving cell and / or determine whether a beam switch or mobility event is needed. In other words, instead of measuring external neighboring cells, the UE may be evaluating different beam(s) or sector(s) of its current serving cell, e.g. as potential mobility targets. The candidate for mobility (e.g., the next best option) may be not a new cell but another beam or sector within the same serving cell.

[0613] In the exemplary context of LTM, the mobility configuration may be included in a message. This may be for example, referred to as a " LTM Configuration message", which may be understood as at least one message, e.g. from a network node, to configure an apparatus, e.g. a User Equipment (UE), for one or more parts or steps of a LTM process and / or a LMT procedure, for example a LTM cell switch. The LTM message may comprise data, information, configurations, parameters and / or instructions, in particular as exemplarily outlined above, e.g. for the UE, e.g. to perform and / or trigger mobility-related measurements and / or reporting.

[0614] A "candidate cell" (or "target cell") may be referred to as a neighboring cell that the apparatus, e.g. the UE, evaluates as a potential replacement for the current serving cell, in particular duringa mobility event. If particular conditions are met / satisfied, the UE may initiate a transition / change process to the candidate / target cell. There may be candidate / target cell(s) for the MN and / or the SN. The MN may evaluate MCG target / candidate cell(s) for an MCG LTM cell change. For example, when a MCG LTM cell change is triggered, the MN may select target / candidate cell(s) within its own MCG. Likewise, the SN may evaluate SCG target / candidate cell(s) for an SCG LTM cell change. For example, when a SCG LTM cell change is triggered, the SN may select target / candidate cell(s) within the SCG. The "serving cell" may the active cell currently providing network connectivity to the UE, e.g. a currently serving cell. There may be a serving MN and / or a serving SN. The UE may, in particular continuously, measure the quality of the serving cell and compare it with potential target / candidate cell(s) to determine if a mobility event is required. Target / candidate cell(s) may be neighboring cell(s). LTM measurements on a neighboring target / candidate cell may performed using SSBs transmitted by the candidate cell for which the SSB configuration is provided to the UE.

[0615] A "reporting criterion" may be at least one condition, requirement, a rule or a set of rules and / or assumption that is to be met, in particular for the apparatus, e.g. the UE, to generate and / or transmit a report, e.g. a measurement report. The reporting criterion may be met, satisfied and / or fulfilled, which may mean that at least one reporting event is triggered, detected, identified and / or determined and / or that event reporting may be initiated or triggered. The reporting criterion may be unfulfilled or not met / satisfied, or at least partially unfulfilled, which may mean that at least one reporting event is not triggered, detected, identified and / or determined and / or that event reporting is not initiated or triggered. As such a "reporting event" may be an indicator, initiator and / or trigger for when the reporting criterion is satisfied, fulfilled and / or met and / or for when an event defined / considered to be reported is present. In other words, a reporting event may occur or be determined to occur when the reporting condition is met. For example, The reporting criterion may define the rules for when a measurement should be reported and / or the reporting event may be the actual moment when those conditions are met, triggering the UE to send a report.

[0616] In a non-limiting example, Lower Layer Triggered Mobility (LTM) may include or define reporting events, in particular LTM reporting events, like LTM2, LTM3, LTM4, and LTM5 events, which may define specific conditions, events and / or scenarios under which the UE may send one or more measurement reports, e.g. to assist with mobility decisions. These events may be tied tomeasurements of Layer 1 (L1) parameters, like L1-RSRP, and may be used for handovers and / or mobility management. The following is a non-limiting, list of example LTM reporting events, e.g. where at least one radio link or at least one beam becomes worse or degrades, and it should be noted that others are also conceivable:

[0617] LTM2 Event: This event may occur, e.g. when a signal strength of a beam of a serving cell falls below or becomes lower than an, e.g. absolute, threshold.

[0618] LTM3 Event: This event may occur e.g. when a signal strength of a beam of a candidate or target cell becomes, e.g. better or stronger, by an amount of offset than a signal strength of a beam of serving cell. For example, wherein at least one measured RS of the at least one candidate cell exceeds at least one measured RS of the serving cell at least by at least one offset value;

[0619] LTM4 Event: This event may occur e.g. when a signal strength of a beam of a candidate or target cell becomes better than an, e.g. absolute, threshold,

[0620] LTM5 Event: This event may occur e.g. when a signal strength of a beam of a serving cell becomes worse than the, e.g. absolute, threshold and a signal strength of a beam of a candidate or target cell becomes better than another, e.g. absolute, threshold.

[0621] In addition thereto or alternatively, the reporting event may be an A3 event, e.g. a measurement event to trigger handover decision. For example, an event A3 or A3 event may occur when a neighboring cell becomes offset better than the serving cell, e.g. by a defined margin / threshold. For example, the UE may monitor signal strength (RSRP) or quality (RSRQ) of both its current serving cell and neighboring cells. When a neighboring cell's signal strength surpasses the serving cell by a configured offset, the UE reports the event to the network, which may then initiate a handover. Needless to say that there may be other events, such as A1, A2, A5 events or the like.

[0622] According to subject-matter described herein, a User Equipment (UE) may manage its mobility capabilities separately / dynamically for a Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure, in particular when operating under / in Dual Connectivity (DC). As described herein, the apparatus, e.g. the UE, may provide its or a number of, in particular maximum, capabilities (e.g. as in Table 1), in particular for supporting cell change(s) of the network, e.g. individually, separately and / or discretely to the MN and SN, in particular it may provide capabilities for MCG LTM to MN and may provide capabilities for SCGto SN, e.g. dynamically. For example, the apparatus, e.g. the UE, may transmit a first indication that indicates a first set of mobility capabilities of the apparatus for or which are usable / available / dedicated for a Master Cell Group (MCG) mobility procedure. The at least one first indication may be transmitted directly and / or embedded / included in at least one message. The first set of mobility capabilities, e.g. as in Table 1 described herein, may be part of a maximum set / number of capabilities of the apparatus, e.g. the UE. The first set of mobility capabilities may be assigned, allocated, reserved and / or associated with / for the MCG mobility procedure, in particular the MCG LTM mobility procedure. The at least one first indication may be transmitted based on a MCG mobility procedure being configured. For example, the at least one first indication may be transmitted based on the apparatus, e.g. the UE, receiving at mobility configuration, e.g. a MCG mobility configuration, from the MN associated with at least one candidate / target cell (e.g. target / candidate MN) of the MCG. For example, depending on the mobility configuration (MCG mobility configuration), the apparatus, e.g. the UE, may dynamically inform the MN about the capabilities available for the MCG mobility procedure. The at least one first indication, for example at least one (other) part thereof, may further indicate support for the SCG mobility procedure, in particular this may be indicated also to the MN.

[0623] Based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured, the apparatus, e.g. the UE may transmit another indication, e.g. at least one second indication, which may be individually, separately and / or detached from the at least one first indication. To this end, it may be said that the apparatus, e.g. the UE, transmits the at least one first / second indication dynamically. The at least one second indication may be transmitted later / after the at least one first indication. The at least one second indication may be transmitted to the SN, indicating and / or specifying remaining capabilities for SCG mobility. This may provide limits for SN and / or prevent the SN from allocating more resources than the UE can handle, given that the UE has already committed some of its capability to MCG mobility in the at least one first indication. The at least one second indication may be transmitted directly or included / embedded in or it may correspond to a measurement report. The measurement report may be an event-based / event-triggered measurement report. The measurement report may be a Layer 1 (L1) measurement report or a Layer 3 (L3) measurement report. However, the at least one second indication may included / embedded in or it may correspond to a Layer 2 (L2) or a Layer 3 (L3) message.The at least one second indication may indicate a second set of mobility capabilities of the apparatus for the SCG mobility procedure. The second set of mobility capabilities, e.g. as in Table 1 described herein, may be part of a maximum set / number of capabilities of the apparatus, e.g. the UE. For example, these may be per group of cells (e.g. maximum number of capabilities that the UE can configure, for example early Timing Advance (TA) acquisition for) or per cell (e.g., a maximum number of TCI state(s) that may be activated for an LTM candidate cell). The second set of mobility capabilities may be assigned, allocated, reserved and / or associated with / for the SCG mobility procedure, in particular the SCG LTM mobility procedure. The at least one second indication may be transmitted based on SCG being configured. For example, the at least one second indication may be transmitted based on the apparatus, e.g. the UE, receiving at mobility configuration, e.g. a SCG mobility configuration, from the SN associated with at least one candidate / target cell (e.g. target / candidate SN) of the SCG. For example, depending on the mobility configuration (SCG mobility configuration), the apparatus, e.g. the UE, may dynamically inform the SN about the capabilities available for the SCG mobility procedure.

[0624] In between transmitting the at least one first indication and the at least one second indication, a coordination process, for example an internode coordination process, in particular between MN and SN as described herein, may be performed / carried out. As mentioned above, the MN may inform the / communicate with the SN (and other candidate MNs / SNs) about the resources / capabilities that can be used for LTM purposes. For example, the MN may determine, decide and / or select, based on the first set of mobility capabilities of the UE for the MCG mobility procedure, mobility capabilities, in particular a set of mobility capabilities for the SCG mobility procedure, which the SN is allowed to configure. To this end, the mobility capabilities of the UE are exchanged, shared and / or communicated / coordinated between the MN and the SN, and eventually also with the apparatus, e.g. the UE.

[0625] After providing both indications, the apparatus, e.g. the UE may proceed with / carry out at least one of the MCG / SCG mobility procedures, based at least in part on the first set of mobility capabilities and / or the second set of mobility capabilities. Since the apparatus, e.g. the UE, and the MN / SN have coordinated / shared the capability, the apparatus, e.g. the UE, can smoothly transition between cells in both MCG and SCG without exceeding its capability limits. Since the apparatus, e.g. the UE, allocates its mobility capabilities dynamically between MN and SN (using the separate indications), situations where MN and SN both assume full capabilityavailability may be avoided and / or reduced, which may avoid scenarios of over-configuration and / or failure. This may result in optimized mobility performance, in particular without exceeding UE limits. By informing both MN and SN separately, the apparatus, e.g. the UE, may enable a better coordinated mobility strategy, leading to faster / more reliable cell transitions.

[0626] According to subject-matter described herein, a User Equipment (UE) may manage its mobility capabilities collectively / statically for a Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure, in particular when operating under / in Dual Connectivity (DC). As described herein, the apparatus, e.g. the UE, may provide its or a number of, in particular maximum, capabilities (e.g. as in Table 1), in particular for supporting cell change(s) of the network, e.g. collectively, combined, together, jointly and / or bundled, e.g. (only / solely / exclusively), to the MN. For example, the apparatus, e.g. the UE, may transmit at least one indication that indicates a set of mobility capabilities of the apparatus. The at least one indication may be transmitted directly and / or embedded / included in at least one message. The set of mobility capabilities of the apparatus, e.g. the UE, e.g. as in Table 1 described herein, may be correspond to and / or include all available mobility capabilities of the apparatus, e.g. the EU, for example a maximum set / number of capabilities of the apparatus, e.g. the UE. The at least one indication may be transmitted based on a MCG mobility procedure being configured. For example, the at least one indication may be transmitted based on the apparatus, e.g. the UE, receiving at mobility configuration, e.g. a MCG mobility configuration, from the MN associated with at least one candidate / target cell (e.g. target / candidate MN) of the MCG. The at least one indication may indicate (e.g. using at least one (other) part thereof) support for (both) a Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure. However, the at least one indication may further indicate support for the MCG mobility procedure and the SCG mobility procedure being configured simultaneously. The at least one indication may further indicate (e.g. using at least one (other) part thereof) a first set of mobility capabilities of the set of mobility capabilities of the apparatus available for, assigned to, allocated, reserved and / or associated with / for the MCG mobility procedure. The at least one indication may further indicate (e.g. using at least one (other) part thereof; or using another indication as outlined in the following) a second set of mobility capabilities of the set of mobility capabilities of the apparatus available for, assigned to, allocated, reserved and / or associated with / for the SCG mobility procedure. The at least one indication may also be split into two, in particular separate indications, e.g. indicating both to the MN (e.g. being transmitted to both the MN), the respective set of capabilities of the apparatus available for the MCGmobility procedure and the set of mobility capabilities of the apparatus available for the SCG mobility procedure. The set of mobility capabilities of the apparatus may exchanged, shared, coordinated and / or communicated between the MN and a Secondary Node (SN), as already mentioned herein.

[0627] After providing the indication, the apparatus, e.g. the UE may proceed with / carry out at least one of the MCG / SCG mobility procedures, based at least in part on the set of mobility capabilities. Since the apparatus, e.g. the UE, and the MN / SN have coordinated / shared the capability, the apparatus, e.g. the UE, can smoothly transition between cells in both MCG and SCG without exceeding its capability limits. Since the apparatus, e.g. the UE, communicates its mobility capabilities to MN for coordination, situations where MN and SN both assume full capability availability may be avoided and / or reduced, which may avoid scenarios of overconfiguration and / or failure. This may result in optimized mobility performance, in particular without exceeding UE limits. To this end, the apparatus, e.g. the UE, may enable a better coordinated mobility strategy, leading to faster / more reliable cell transitions.

[0628] The term "non-transitory," as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM).

[0629] As used herein, "at least one of the following: " and "at least one of " and similar wording, where the list of two or more elements are joined by "and" or "or", mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.

[0630] The apparatus may include a processor configured to provide signals to and receive signals and to control the functioning of the apparatus. The processor may be configured to control other elements of apparatus by effecting control signaling via electrical leads connecting processor to the other elements, such as a display or a memory. The processor may, for example, be embodied in a variety of ways including circuitry, at least one processing core, one or more microprocessors with accompanying digital signal processor(s), one or more processor(s) without an accompanying digital signal processor, one or more coprocessors, one or more multi-core processors, one or more controllers, processing circuitry, one or more computers, various other processing elements including integrated circuits (for example, anapplication specific integrated circuit (ASIC), a field programmable gate array (FPGA), and / or the like), or some combination thereof.

[0631] The term "circuitry" may refer to one or more or all of the following:

[0632] (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and

[0633] (b) combinations of hardware circuits and software, such as (as applicable):

[0634] (i) a combination of analog and / or digital hardware circuit(s) with software / firmware and

[0635] (ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and

[0636] hardware circuit(s) and / or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.

[0637] 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 an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.

[0638] The apparatus may comprise memory which may store information elements. The apparatus may include volatile memory and / or non-volatile memory. For example, volatile memory may include Random Access Memory (RAM) including dynamic and / or static RAM, on-chip or off-chip cache memory, and / or the like. Non-volatile memory, which may be embedded and / or removable, may include, for example, read-only memory, flash memory, magnetic storage devices, for example, hard disks, floppy disk drives, magnetic tape, optical disc drives and / or media, non-volatile random access memory (NVRAM), and / or the like. Like volatile memory, non-volatile memory may include a cache area for temporary storage of data. At least part of the volatile and / or non-volatile memory may be embedded in processor. The memories maystore one or more software programs, instructions, pieces of information, data, and / or the like which may be used by the apparatus for performing operations disclosed herein.

[0639] The apparatus may be a User Equipment, for example a mobile or handled device, for example a mobile phone, or may be at least comprised in a UE.

[0640] Fig. 1 shows example signaling according to subject-matter described herein. It should be noted that any reference related to LTM, specific UE-capabilities, specific bearer(s), number of cell(s), number of state(s), or the like may be considered optional and, in particular, not limiting. Fig. 1 should rather be considered as a non-limiting example of the subject-matter described in terms of LTM. Fig. 1 may relate to an internode (e.g. between MN / SN) coordination procedure as described herein.

[0641] Step 1: The apparatus, e.g. the UE, may be configured with Dual Connectivity (DC), e.g. either with SRB1 or SRB3, and / or it may be in DC mode.

[0642] Step 2: The apparatus, e.g. the UE, may be configured with MCG LTM. In particular, the source MN may inform the target MN about the configuration for which it can simultaneously configure any of the LTM capabilities listed in Table 1.

[0643] - As a non-limiting example, the source MN may inform the target / candidate MNs that candidate MN or source SN can configure up to, e.g. 3 (or any number of) TCI state(s) to be activated for a target candidate cell;

[0644] In another non-limiting example, the source MN may inform the target / candidate MNs that candidate MN or source SN can configure up to, e.g. 1 (or any number of) cell for which UE can perform early RRC decoding;

[0645] In yet another non-limiting example, the source MN may inform target / candidate MNs that candidate MN or source SN can configure up to, e.g. 2 (or any number of) cell(s) for which the UE can perform NW-triggered early TA acquisition and / or UE-based TA estimation;

[0646] In yet another non-limiting example, the source MN may inform target / candidate MNs that candidate MN or source SN can configure towards the UE, in particular the maximum number for any of the combinations that are possible through the capabilities listed in Table 1;Further non-limiting examples may comprise one or more of the following (and / or other / additional non-limiting examples based on Table 1):

[0647] -- a maximum number of joint / DL LTM TCI states (in particular when joint LTM TCI states are used) that source SN is allowed to configure across all its target / candidate cell(s);

[0648] -- a maximum number of DL and / or UL LTM TCI states (in particular when separate LTM TCI states are used) that source SN is allowed to configure across all its target / candidate cell(s);

[0649] -- a maximum number of MAC CE activated joint / DL LTM TCI states that source SN is allowed to activate across all its target / candidate cell(s) and / or serving cell(s);

[0650] -- a maximum number of MAC CE activated DL and / or UL LTM TCI states that source SN is allowed to activate across all its target / candidate cell(s) and / or serving cell(s); -- a maximum number of configured cells for joint LTM TCI state(s);

[0651] -- a maximum number of configured cells for DL and UL LTM TCI state(s);

[0652] In another non-limiting example embodiment, the source MN may simply send / transmit at least one indication to the target MN, in particular informing / indicating that the candidate MN or the source SN is allowed to configure any combination of the capabilities listed in Table 1, in particular for MCG or SCG LTM (e.g., the source MN may inform the source SN that it can send early TCI state activation MAC CE, trigger PDCCH order for early TA acquisition etc.) towards the UE for SCG LTM candidate(s)). In the context of this example, no further information may be sent / required from the source MN to the candidate MN.

[0653] Step 3: The source MN may inform the source SN about the particular combination (one or more) of the LTM capabilities listed in Table 1.

[0654] - As a non-limiting example, the source MN can inform the source SN that a candidate MN or a source SN can configure up to, e.g. 3 (or any number of) TCI states to be activated for a target / candidate cell;

[0655] In another non-limiting example, the source MN can inform the source SN that a candidate MN or a source SN can configure up to, e.g. 1 (or any number of) cell for which UE can perform early RRC decoding;In yet another non-limiting example, the source MN can inform source SN that candidate MN or source SN can configure up to, e.g. 2 (or any number of) cells for which UE can perform NW-triggered early TA acquisition and / or UE-based TA estimation;

[0656] In yet another non-limiting example, the source MN can inform the source SN that a candidate MN or a source SN can configure towards the UE the maximum number for any of the combinations that are possible through the capabilities listed in Table 1; Further non-limiting examples may comprise one or more of the following (and / or other / additional non-limiting examples based on Table 1):

[0657] -- a maximum number of joint / DL LTM TCI states (in particular when joint LTM TCI states are used) that source SN is allowed to configure across all its target / candidate cell(s);

[0658] -- a maximum number of DL and / or UL LTM TCI states (in particular when separate LTM TCI states are used) that source SN is allowed to configure across all its target / candidate cell(s);

[0659] -- a maximum number of MAC CE activated joint / DL LTM TCI states that source SN is allowed to activate across all its target / candidate cell(s) and / or serving cell(s);

[0660] -- a maximum number of MAC CE activated DL and / or UL LTM TCI states that source SN is allowed to activate across all its target / candidate cell(s) and / or serving cell(s); -- a maximum number of configured cells for joint LTM TCI state(s);

[0661] -- a maximum number of configured cells for DL and UL LTM TCI state(s).

[0662] In another non-limiting example embodiment, the source MN may send / transmit at least one indication to the source SN informing / indicating that the candidate MN or source SN is allowed to configure any combination of the capabilities listed in Table 1, in particular for MCG or SCG LTM (e.g., source MN informs source SN that it can send early TCI state activation MAC CE, or trigger PDCCH order for early TA acquisition etc.) towards the UE for SCG LTM candidate(s)). In the context of this example, no further information may be sent / required from the source MN to the source SN.

[0663] Step 4: Based on the LTM limits that have been given by the MN, the source SN may then decide / determine to configure (e.g. intra- or inter-CU) LTM and / or inform the other candidate SNs about these limits.Step 5: The source SN may acknowledge the configuration given by source MN, in particular by transmitting an SN modification request ack message.

[0664] Fig. 2 shows example signaling according to subject-matter described herein. It should be noted that any reference related to LTM, specific UE-capabilities, specific bearer(s), number of cell(s), number of state(s), or the like may be considered optional and, in particular, not limiting. Fig. 2 should rather be considered as a non-limiting example of the subject-matter described in terms of LTM. Fig. 2 may relate to an internode (e.g. between MN / SN) coordination procedure. Fig. 2 includes steps that may be combined with the steps shown in Fig. 1.

[0665] Steps 6-12: The apparatus, e.g. the UE may be configured with SCG LTM (Step 6) and / or determine, detect and / or observe that an event is triggered, in particular for SCG LTM. The apparatus, e.g. the UE, may inform the source SN, e.g. by sending a message, e.g. a measurement report (Step 7). The source SN may prepare and / or trigger SCG LTM execution (e.g., it may send a message, e.g. a cell switch command, e.g. a cell switch MAC CE for LTM execution) (Steps 8-9). The apparatus, e.g. the UE may execute the SCG LTM, in particular as instructed by the network. The apparatus, e.g. the UE, may transmit a (Random Access (RA)) preamble (Step 10), a Random Access Response (RAR) (Step 11), and a Radio Resource Reconfiguration (RRC) complete message (Step 12). Further details (e.g. one or more features) may be added based on the example mobility procedure as described herein.

[0666] Fig. 3 shows example signaling according to subject-matter described herein. It should be noted that any reference related to LTM, specific UE-capabilities, specific bearer(s), number of cell(s), number of state(s), or the like may be considered optional and, in particular, not limiting. Fig. 3 should rather be considered as a non-limiting example of the subject-matter described in terms of LTM. Fig. 3 may relate to an internode (e.g. between MN / SN) coordination procedure. Fig. 3 may include and / or be combined with one or more steps (e.g. Steps 1-6) as shown in Fig. 1.

[0667] Fig. 4A shows example signaling according to subject-matter described herein. It should be noted that any reference related to LTM, specific UE-capabilities, specific bearer(s), number of cell(s), number of state(s), or the like may be considered optional and, in particular, not limiting. Fig. 4A should rather be considered as a non-limiting example of the subject-matter described in terms of LTM. Fig. 4A may relate to an internode (e.g. between MN / SN) coordinationprocedure. Fig. 4A includes steps that may be combined with the steps shown in Fig. 1. Fig.

[0668] 4A may include and / or be combined with one or more steps (e.g. Steps 1-5) as shown in Fig.

[0669] 1 and / or Fig. 3.

[0670] Steps 1-6: These may be the same or at least similar to the steps 1-6 of Fig 1 and / or Fig. 3.

[0671] Step 7, 8: When the apparatus, e.g. the UE, determines, detects and / or observes that that a measurement event criterion is met (e.g., A3, LTM 3, etc.), in particular for the SCG, the apparatus, e.g. the UE, can indicate that to the source SN, in particular together with information, e.g. on the number of cells for which it can support additional configurations. As a non-limiting example, based on its own capabilities and the subset of these capabilities that have already been used for MCG LTM purposes, the apparatus, e.g. the UE, can further indicate to the source SN, e.g. the maximum number of cells for which SN can trigger, in particular early UL / DL synchronization, decoding, etc. In another non-limiting implementation, such information can be indicated through dedicated L2 / L3 signaling.

[0672] Step 9-13: Based on the network configuration, the apparatus, e.g. the UE, can perform SCG LTM. In particular, for steps 9-13, reference to Fig. 2 may be made, e.g. one or more of the steps (steps 8-12; taking into account the numbering due to the two options of steps 7 / 8) shown in Fig. 2 may be correspondingly applied and / or performed.

[0673] Fig. 4B shows example signaling according to subject-matter described herein. It should be noted that any reference related to LTM, specific UE-capabilities, specific bearer(s), number of cell(s), number of state(s), or the like may be considered optional and, in particular, not limiting. Fig. 4B should rather be considered as a non-limiting example of the subject-matter described in terms of LTM. Fig. 4B may relate to an internode (e.g. between MN / SN) coordination procedure. Fig. 4B includes steps that may be combined with the steps shown in Fig. 1, Fig. 2 and / or Fig. 4A. Fig. 4B may include and / or be combined with one or more steps (e.g. Steps 1-5) as shown in Fig. 1 and / or one or more steps (e.g. steps 7, 8-13) shown in Fig. 4A.

[0674] Steps 1-6: These may be the same or at least similar to the steps 1-6 of Fig 1 and / or Fig. 3.

[0675] (possibly) Steps 7, 8-13: These may be the same or at least similar to the steps 7, 8-13 of Fig 2 and / or Fig. 4A.Step 14, 15: When the apparatus, e.g. the UE, determines, detects and / or observes that that a measurement event criterion is met (e.g., A3, LTM 3, etc.), in particular for the SCG, the apparatus, e.g. the UE, can indicate that to the source MN, in particular together with information, e.g. on the number of cells for which it can support additional configurations. As a non-limiting example, based on its own capabilities and the subset of these capabilities that have already been used for SCG LTM purposes, the apparatus, e.g. the UE can further indicate to the source MN, e.g. the maximum number of cells for which MN can trigger, in particular early UL / DL synchronization, decoding, etc. In another non-limiting implementation, such information can be indicated through dedicated L2 / L3 signaling

[0676] Step 9-13: Based on the network configuration, the apparatus, e.g. the UE, can perform MCG LTM. In particular, for steps 9-13, reference to Fig. 2 may be made, e.g. one or more of the steps (steps 8-12; taking into account the numbering due to the two options of steps 7 / 8) shown in Fig. 2 may be correspondingly applied and / or performed.

[0677] As described above, in a non-limiting example, the apparatus, e.g. the UE, may indicate separately any combination of the LTM capabilities listed in Table 1 for MCG LTM and for SCG LTM, as described herein. In one example embodiment, all these capabilities may be indicated to MN (by sending at least one indication), wherein the MN may further indicate to SN the UE capabilities that have been exposed for SCG LTM (this may be referred to as static approach). In another example embodiment, as described herein, the apparatus, e.g. the UE, may indicate its MCG LTM capabilities to MN, along with an indication of support of SCG LTM. Then, upon configuration of SCG LTM (or simply DC), the apparatus, e.g. the UE, may indicate to SN the capabilities that it can support for SCG LTM. MN and SN would then configure the apparatus, e.g. the UE, based on these exposed capabilities (this may be referred to as dynamic approach).

[0678] Fig. 5 shows a flow chart 500 of an example aspect of subject-matter described herein. The flow chart may comprise steps of an apparatus, a method and / or a non-transitory computer readable medium as mentioned herein.

[0679] The flow chart 500 may include the step of transmitting 510, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of theapparatus for a Master Cell Group (MCG) mobility procedure. The flow chart 500 may include the step of, based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured, transmitting 520, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure. The flow chart 500 may include the step of performing 530 at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.

[0680] The flow chart 500 may comprise or be combined with one or more additional steps associated with some of the example aspects and / or associate example embodiments described herein.

[0681] Fig. 6 shows a flow chart 600 of an example aspect of subject-matter described herein. The flow chart may comprise steps of an apparatus, a method and / or a non-transitory computer readable medium as mentioned herein.

[0682] The flow chart 600 may include the step of transmitting 610, to a Master Node (MN) of a network, at least one indication that indicates a set of mobility capabilities of the apparatus, wherein the at least one indication indicates support for a Master Cell Group (MCG) mobility procedure and a Secondary Cell Group (SCG) mobility procedure. The flow chart 600 may include the step of performing 620 at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the set of mobility capabilities.

[0683] The flow chart 600 may comprise or be combined with one or more additional steps associated with some of the example aspects and / or associate example embodiments described herein.

[0684] While the foregoing is directed to embodiments of the disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.LIST OF ABBREVIATIONS

[0685] BFD Beam Failure Detection

[0686] CE Control Element

[0687] CSI Channel State Information

[0688] DC Dual Connectivity

[0689] DL Downlink

[0690] L1 Layer 1

[0691] L2 Layer 2

[0692] L3 Layer 3

[0693] LTM Lower Layer Triggered Mobility MAC Medium Access Control

[0694] MCG Master Cell Group

[0695] MN Master Node

[0696] NG Next Generation

[0697] PCell Primary Cell

[0698] PBCH Physical Broadcast Channel PCI Physical Cell Identity

[0699] PDCCH Physical Downlink Control Channel PDSCH Physical Data Shared Channel PSCell Primary Secondary Cell

[0700] RAN Radio Access Network

[0701] RRC Radio Resource Control

[0702] RS Reference Signal

[0703] RSRP Reference Signal Received Power SCG Secondary Cell Group

[0704] SCell Secondary Cell

[0705] SINR Signal to Interference Noise Ratio SN Secondary Node

[0706] SS Synchronization Signal

[0707] SSB Synchronization Signal Block

[0708] TA Timing Advance

[0709] TCI Transmission Configuration Index UE User Equipment

[0710] UL UplinkLIST OF REFERENCE NUMERALS

[0711] 500-600 Flow chart 510, 520 Transmitting step 610 Transmitting step 530, 620 Performing step

Claims

CLAIMS1. Apparatus, comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:transmitting, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of the apparatus for a Master Cell Group (MCG) mobility procedure,based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured,transmitting, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure,performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.

2. Apparatus according to claim 1, wherein the at least one first indication further indicates support for the SCG mobility procedure.

3. Apparatus according to any one of the preceding claims, wherein at least the first set of mobility capabilities of the apparatus is exchanged between the MN and the SN.

4. Apparatus according to any one of the preceding claims, wherein the first set of mobility capabilities of the apparatus and the second set of mobility capabilities of the apparatus are at least one of: coordinated or shared between the MN and the SN.

5. Apparatus according to any one of the preceding claims, wherein the first set of mobility capabilities of the apparatus occupies a number of cells of the MCG.

6. Apparatus according to any one of the preceding claims, wherein the first set of mobility capabilities of the apparatus includes at least one limitation that applies within at least one cell of the MCG.

7. Apparatus according to any one of the preceding claims, wherein the at least one second indication indicates a maximum number of cells of the SCG available for the second set of mobility capabilities of the apparatus.

8. Apparatus according to any one of the preceding claims, wherein the at least one second indication is included in or corresponds to a measurement report, wherein the measurement report is an event-based measurement report, wherein the measurement report is a Layer 1 (L1) measurement report or a Layer 3 (L3) measurement report.

9. Apparatus according to any one of the preceding claims, wherein the at least one second indication is transmitted based on determining that an event criterion for at least one of: the MCG cell change procedure or the SCG cell change procedure is fulfilled.

10. Apparatus according to any one of the preceding claims 1-7, wherein the at least one second indication is included in or corresponds to a Layer 2 (L2) or a Layer 3 (L3) message.

11. Apparatus according to any one of the preceding claims, wherein the second set of mobility capabilities of the apparatus for the SCG mobility procedure is determined based at least in part on available mobility capabilities of the apparatus and the first set of mobility capabilities of the apparatus already assigned to the MCG mobility procedure.

12. Apparatus according to any one of the preceding claims, wherein the at least one processor; and the at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to perform:transmitting, to the MN, at least one third indication that indicates a third set of mobility capabilities of the apparatus for the MCG mobility procedure, wherein the third indication is transmitted after the SCG mobility procedure.

13. Apparatus according to any one of the preceding claims, wherein the apparatus is in a Dual Connectivity (DC) mode, wherein the MN and the SN are serving nodes of theapparatus, wherein the apparatus is simultaneously configured with the MCG mobility procedure and the SCG mobility procedure.

14. Apparatus according to any one of the preceding claims, wherein the mobility capabilities of the apparatus are Lower Layer Triggered Mobility (LTM) capabilities.

15. Apparatus according to any one of the preceding claims, wherein the mobility procedures are Lower Layer Triggered Mobility (LTM) mobility procedures, wherein the mobility procedures are LTM cell change procedures.

16. Apparatus according to any one of the preceding claims, wherein the at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, event.

17. Apparatus according to any one of the preceding claims, wherein the at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, 3 event.

18. Apparatus according to any one of the preceding claims 1-15, wherein the at least one second indication is transmitted based on an A3 event.

19. Apparatus according to any one of the preceding claims, wherein the apparatus is a User equipment, UE, or wherein the apparatus is comprised in a UE.

20. Method, comprising:transmitting, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of an apparatus for a Master Cell Group (MCG) mobility procedure,based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured,transmitting, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure,performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.

21. Method according to claim 20, wherein the at least one first indication further indicates support for the SCG mobility procedure.

22. Method according to any one of the preceding claims 20-21, wherein at least the first set of mobility capabilities of the apparatus is exchanged between the MN and the SN.

23. Method according to any one of the preceding claims 20-22, wherein the first set of mobility capabilities of the apparatus and the second set of mobility capabilities of the apparatus are at least one of: coordinated or shared between the MN and the SN.

24. Method according to any one of the preceding claims 20-23, wherein the first set of mobility capabilities of the apparatus occupies a number of cells of the MCG.

25. Method according to any one of the preceding claims 20-24, wherein the first set of mobility capabilities of the apparatus includes at least one limitation that applies within at least one cell of the MCG.

26. Method according to any one of the preceding claims 20-25, wherein the at least one second indication indicates a maximum number of cells of the SCG available for the second set of mobility capabilities of the apparatus.

27. Method according to any one of the preceding claims 20-26, wherein the at least one second indication is included in or corresponds to a measurement report, wherein the measurement report is an event-based measurement report, wherein the measurement report is a Layer 1 (L1) measurement report or a Layer 3 (L3) measurement report.

28. Method according to any one of the preceding claims 20-27, wherein at least one second indication is transmitted based on determining that an event criterion for at least one of: the MCG cell change procedure or the SCG cell change procedure is fulfilled.

29. Method according to any one of the preceding claims 20-26, wherein the at least one second indication is included in or corresponds to a Layer 2 (L2) or a Layer 3 (L3) message.

30. Method according to any one of the preceding claims 20-29, wherein the second set of mobility capabilities of the apparatus for the SCG mobility procedure is determined based at least in part on available mobility capabilities of the apparatus and the first set of mobility capabilities of the apparatus already assigned to the MCG mobility procedure.

31. Method according to any one of the preceding claims 20-30, wherein the method comprises:transmitting, to the MN, at least one third indication that indicates a third set of mobility capabilities of the apparatus for the MCG mobility procedure, wherein the third indication is transmitted after the SCG mobility procedure.

32. Method according to any one of the preceding claims 20-31, wherein the apparatus is in a Dual Connectivity (DC) mode, wherein the MN and the SN are serving nodes of the apparatus, wherein the apparatus is simultaneously configured with the MCG mobility procedure and the SCG mobility procedure.

33. Method according to any one of the preceding claims 20-32, wherein mobility capabilities of the apparatus are Lower Layer Triggered Mobility (LTM) capabilities.

34. Method according to any one of the preceding claims 20-33, wherein the mobility procedures are Lower Layer Triggered Mobility (LTM) mobility procedures, wherein the mobility procedures are LTM cell change procedures.

35. Method according to any one of the preceding claims 20-34, wherein at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, event.

36. Method according to any one of the preceding claims 20-35, wherein at least one second indication is transmitted based on a Lower Layer Triggered Mobility, LTM, 3 event.

37. Method according to any one of the preceding claims 20-34, wherein at least one second indication is transmitted based on an A3 event.

38. Method according to any one of the preceding claims 20-37, wherein the apparatus is a User equipment, UE, or wherein the apparatus is comprised in a UE.

39. A non-transitory computer readable storage medium comprising program instructions that, when executed by an apparatus, in particular according to any one of claims 1-19, causes operations comprising:transmitting, to a Master Node (MN) of a network, at least one first indication that indicates a first set of mobility capabilities of an apparatus for a Master Cell Group (MCG) mobility procedure,based at least in part on a Secondary Cell Group (SCG) mobility procedure being configured,transmitting, to a Secondary Node (SN) of the network, at least one second indication that indicates a second set of mobility capabilities of the apparatus for the SCG mobility procedure,performing at least one of: the MCG mobility procedure or the SCG mobility procedure, based at least in part on the first set of mobility capabilities and the second set of mobility capabilities.

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