Mobility event management based on detection of use of auxiliary beams

Abstract

Various example embodiments relate to an apparatus, method, and computer program product to support mobility management in a wireless communication network. In particular, embodiments relate to apparatuses, methods, and computer program products for supporting mobility event management based on detection of use of an auxiliary beam. According to one example embodiment of the invention, there is provided a mobile network node method comprising: receiving an indication of a detection assistance beam associated with a serving beam, the detection assistance beam configured to provide a radio coverage area to assist in detecting a mobile network node of a location within a wireless communication network; receiving an indication of a measurement configuration to be implemented by the network node in relation to at least the serving beam and the associated detection assistance beam and an indication of a mobility event trigger condition dependent on the indicated measurement configuration; performing measurement according to the measurement configuration; evaluating whether a mobility event trigger condition has been satisfied based on the performed measurements; and executing a mobility event associated with the mobility event trigger condition based on the evaluation. A mobile network node and a computer program product operable to perform the method are also provided. The use of the detection assistance beam may facilitate events in cases where conventional mobility approaches may be insufficient.

Description

Technical Field

[0001] Various example embodiments relate to apparatus, methods, and computer program products that support mobility management in wireless communication networks. In particular, embodiments relate to apparatus, methods, and computer program products that support mobility event management based on the use of detection auxiliary beams. Background Technology

[0002] Regarding wireless communication networks, user equipment (UE) is configured to communicate with the core network via a radio link. As the UE moves within the network, radio coverage areas are provided to the UE by various types of transmit and receive points (TRPs).

[0003] Within a wireless communication network, there may be various methods for managing ongoing communications. In particular, there may be various mobility methods to support ongoing communications between the UE and the network as the UE moves between different radio coverage areas.

[0004] The deployment recognizes that with the development of wireless communication technology deployments, scenarios have emerged that may not be well served by existing mobility technologies. The deployment seeks to provide a mechanism that can address such scenarios and potentially improve overall network operation. Summary of the Invention

[0005] The scope of protection sought by the various exemplary embodiments of the present invention is set forth in the independent claims. Exemplary embodiments and features (if any) described in this specification that do not fall within the scope of the independent claims should be interpreted as examples that aid in understanding the various embodiments of the invention.

[0006] According to various, but not necessarily all, exemplary embodiments of the present invention, a mobile network node is provided, comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the network node to at least: receive an indication of a detection auxiliary beam associated with a serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of the mobile network node within a wireless communication network; receive an indication of a measurement configuration and an indication of a mobility event triggering condition, the measurement configuration being to be implemented by the network node at least in relation to the serving beam and the associated detection auxiliary beam, the mobility event triggering condition depending on the indicated measurement configuration; perform a measurement according to the measurement configuration; evaluate, based on the performed measurement, whether the mobility event triggering condition has been met; and, based on the evaluation, execute a mobility event associated with the mobility event triggering condition.

[0007] The detection auxiliary beam may include a beam having a line-of-sight direction different from that of the serving beam.

[0008] Detection auxiliary beams may include beams directed toward areas where mobility events are expected to be initiated.

[0009] The detection auxiliary beam can be configured so that it does not support communication links with mobile network nodes.

[0010] The detection auxiliary beam can be configured to prevent support for communication links with mobile network nodes.

[0011] The detection auxiliary beam and service beam can be configured as a common antenna array originating from network nodes.

[0012] The detection auxiliary beam and service beam can be configured to originate from public network nodes.

[0013] The detection auxiliary beam and service beam can be configured to originate from different network nodes.

[0014] Mobility events may include the transmission of measurement reports.

[0015] Mobility events may include the transmission of beam switching indicators.

[0016] Mobility events can include switching communication from a serving beam to a target beam.

[0017] Mobility events may include the transmission of an indication to reserve target beam resources for communication with the mobile network node.

[0018] Mobility events can include cell handover or conditional handover.

[0019] Mobility events can include beam switching within a cell.

[0020] Measurement configuration may include configuring a mobile network node to measure indications of signal quality experienced at the mobile network node in relation to the serving beam and the detection auxiliary beam.

[0021] Indications of signal quality may include: reference signal received power, or reference signal received quality, or signal-to-interference-to-noise ratio, or angle of arrival, or a combination thereof.

[0022] Measurement configuration may include: indications of measurement resources, such as Channel State Information Reference Signal (CSI-RS) or Synchronization Signal Block (SSB).

[0023] Measurement configuration may include: indication of the measurement period.

[0024] Mobility event triggering conditions may include: a comparison of the measurement of the serving beam with the equivalent measurement of the detection auxiliary beam.

[0025] Mobility event triggering conditions may include: a threshold difference between the measurement of the serving beam and the equivalent measurement of the detection auxiliary beam.

[0026] The measurement configuration may also include: configuring the mobile network node to measure an indication of the signal quality experienced at the mobile network node in relation to at least one target beam.

[0027] Mobility event triggering conditions may also include: a threshold measurement of the signal quality associated with at least one target beam experienced at the mobile network node.

[0028] Mobile network nodes may include user equipment or customer premises equipment.

[0029] Mobile network nodes may include user equipment or network access nodes that include circuitry configured to generate radio frequency signals.

[0030] The service beam and detection auxiliary beam can be supported by remote wireless heads deployed in the high-speed train network.

[0031] According to various, but not necessarily all, example embodiments of the present invention, a mobile network node is provided, comprising: components configured to receive an indication of a detection auxiliary beam associated with a serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a location within a wireless communication network; components configured to receive an indication of a measurement configuration and an indication of a mobility event triggering condition, the measurement configuration being to be implemented by the network node at least in relation to the serving beam and the associated detection auxiliary beam, the mobility event triggering condition depending on the indicated measurement configuration; components configured to perform a measurement according to the measurement configuration; components configured to evaluate whether the mobility event triggering condition has been met based on the performed measurement; and components configured to execute a mobility event associated with the mobility event triggering condition based on the evaluation.

[0032] The components can perform the optional features described in relation to the aforementioned apparatus.

[0033] According to various, but not necessarily all, example embodiments of the present invention, a mobile network node is provided, comprising: circuitry configured to receive an indication of a detection auxiliary beam associated with a serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a location within a wireless communication network; circuitry configured to receive an indication of a measurement configuration and an indication of a mobility event triggering condition, the measurement configuration being to be implemented by the network node at least in relation to the serving beam and the associated detection auxiliary beam, the mobility event triggering condition depending on the indicated measurement configuration; circuitry configured to perform a measurement according to the measurement configuration; circuitry configured to evaluate whether the mobility event triggering condition has been satisfied based on the performed measurement; and circuitry configured to execute a mobility event associated with the mobility event triggering condition based on the evaluation.

[0034] The circuit can perform the optional features described in relation to the above-described device.

[0035] According to various, but not necessarily all, example embodiments of the present invention, a mobile network node method is provided, comprising: receiving an indication of a detection auxiliary beam associated with a serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a mobile network node's location within a wireless communication network; receiving an indication of a measurement configuration and an indication of a mobility event triggering condition, the measurement configuration being to be implemented by the network node at least in relation to the serving beam and the associated detection auxiliary beam, the mobility event triggering condition depending on the indicated measurement configuration; performing a measurement according to the measurement configuration; evaluating, based on the performed measurement, whether the mobility event triggering condition has been met; and, based on the evaluation, executing a mobility event associated with the mobility event triggering condition.

[0036] The method may include method features equivalent to the optional features described with respect to the above-described apparatus.

[0037] According to various, but not necessarily all, exemplary embodiments of the present invention, a computer program product is provided that, when executed on a computer, is operable to perform the following steps: receiving an indication of a detection auxiliary beam associated with a serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a mobile network node's location within a wireless communication network; receiving an indication of a measurement configuration and an indication of a mobility event triggering condition, the measurement configuration being to be implemented by the network node at least in relation to the serving beam and the associated detection auxiliary beam, the mobility event triggering condition depending on the indicated measurement configuration; performing a measurement according to the measurement configuration; evaluating, based on the performed measurement, whether the mobility event triggering condition has been met; and, based on the evaluation, executing a mobility event associated with the mobility event triggering condition.

[0038] According to various, but not necessarily all, exemplary embodiments of the present invention, a non-transitory computer-readable medium is provided, comprising program instructions stored thereon for at least performing the following: receiving an indication of a detection auxiliary beam associated with a serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a mobile network node's location within a wireless communication network; receiving an indication of a measurement configuration and an indication of a mobility event triggering condition, the measurement configuration being to be implemented by the network node at least in relation to the serving beam and the associated detection auxiliary beam, the mobility event triggering condition depending on the indicated measurement configuration; performing a measurement according to the measurement configuration; evaluating, based on the performed measurement, whether the mobility event triggering condition has been met; and, based on the evaluation, executing a mobility event associated with the mobility event triggering condition.

[0039] According to various, but not necessarily all, example embodiments of the present invention, a network control node is provided, comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the network node to at least: determine that conditions for implementing detection auxiliary beam mobility at a network access node are satisfied; determine a measurement configuration to be implemented at least in relation to a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of a mobile network node within a wireless communication network; determine mobility event triggering conditions dependent on the determined measurement configuration; and provide an indication to the mobile network node or the mobile access node of the measurement configuration and the mobility event triggering conditions, the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0040] Determining that the conditions for achieving detection of auxiliary beam mobility at the network access node are met may include receiving an indication from the network access node that supports the serving beam.

[0041] Determining that the conditions for achieving detection of auxiliary beam mobility at the network access node are met may include receiving an indication from a mobile network node communicating with the network via a service beam supported by the network access node.

[0042] The network control node can be configured to initiate a detection auxiliary beam associated with the service beam supported by the network access node by instructing the network access node to initiate the transmission of the detection auxiliary beam.

[0043] The network control node can be configured to initiate a detection auxiliary beam associated with the serving beam supported by the network access node by identifying the beam transmitted by the network access node as a candidate to be used as a detection auxiliary beam associated with the serving beam, and determining the measurement configuration accordingly.

[0044] The detection auxiliary beam may include a beam having a line-of-sight direction different from that of the serving beam.

[0045] Detection auxiliary beams may include beams directed toward areas where mobility events are expected to be initiated.

[0046] The detection auxiliary beam may not be configured to support communication links with mobile network nodes.

[0047] The detection auxiliary beam and service beam can be configured as a common antenna array originating from network nodes.

[0048] The detection auxiliary beam and service beam can be configured to originate from public network nodes.

[0049] The detection auxiliary beam and service beam can be configured to originate from different network nodes.

[0050] Mobility events may include the transmission of measurement reports.

[0051] Mobility events may include the transmission of beam switching indicators.

[0052] Mobility events can include switching communication from a serving beam to a target beam.

[0053] Mobility events may include the transmission of an indication to reserve target beam resources for communication with the mobile network node.

[0054] Mobility events can include cell handover or conditional handover.

[0055] Mobility events can include beam switching within a cell.

[0056] Measurement configuration may include configuring a mobile network node to measure indications of signal quality experienced at the mobile network node in relation to the serving beam and the detection auxiliary beam.

[0057] Indications of signal quality may include: reference signal received power, or reference signal received quality, or signal-to-interference-to-noise ratio, or angle of arrival, or a combination thereof.

[0058] Mobility event triggering conditions may include: a comparison of the measurement of the serving beam with the equivalent measurement of the detection auxiliary beam.

[0059] Mobility event triggering conditions may include: a threshold difference between the measurement of the serving beam and the equivalent measurement of the detection auxiliary beam.

[0060] The measurement configuration may also include: configuring the mobile network node to measure an indication of the signal quality experienced at the mobile network node in relation to at least one target beam.

[0061] Mobility event triggering conditions may include: a threshold measurement of signal quality at a mobile network node that is associated with at least one target beam.

[0062] According to various, but not necessarily all, exemplary embodiments of the present invention, a network control node is provided, comprising: means for determining that conditions for implementing detection auxiliary beam mobility at a network access node are met; means for determining a measurement configuration, the measurement configuration being implemented at least in relation to a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a mobile network node's location within a wireless communication network; means for determining mobility event triggering conditions dependent on the determined measurement configuration; and means for providing an indication of the measurement configuration and the mobility event triggering conditions to a mobile network node or a mobile access node, the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0063] The components can perform the optional features described in relation to the aforementioned apparatus.

[0064] According to various, but not necessarily all, exemplary embodiments of the present invention, a network control node is provided, comprising: circuitry configured to determine that conditions for implementing detection auxiliary beam mobility at a network access node are satisfied; circuitry configured to determine a measurement configuration, the measurement configuration being implemented at least in relation to a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a mobile network node's location within a wireless communication network; circuitry configured to determine mobility event triggering conditions dependent on the determined measurement configuration; and circuitry configured to provide an indication of the measurement configuration and the mobility event triggering conditions to the mobile network node or the mobile access node, the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0065] The circuit can perform the optional features described with respect to the above-described device.

[0066] According to various, but not necessarily all, exemplary embodiments of the present invention, a network control node method is provided, comprising: determining that conditions for implementing detection auxiliary beam mobility at a network access node are met; determining a measurement configuration to be implemented at least in relation to a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of a mobile network node within a wireless communication network; determining mobility event triggering conditions dependent on the determined measurement configuration; and providing an indication to a mobile network node or a mobile access node of the measurement configuration and the mobility event triggering conditions, the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0067] The method may include method features equivalent to the optional features described with respect to the above-described apparatus.

[0068] According to various, but not necessarily all, exemplary embodiments of the present invention, a computer program product is provided that, when executed on a computer, is operable to perform the following steps: determining that conditions for implementing detection auxiliary beam mobility at a network access node are met; determining a measurement configuration to be implemented at least in relation to a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of a mobile network node within a wireless communication network; determining mobility event triggering conditions dependent on the determined measurement configuration; and providing an indication to the mobile network node or mobile access node of the measurement configuration and the mobility event triggering conditions, the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0069] According to various, but not necessarily all, exemplary embodiments of the present invention, a non-transitory computer-readable medium is provided, comprising program instructions stored thereon for performing at least the following: determining that conditions for implementing detection auxiliary beam mobility at a network access node are met; determining a measurement configuration to be implemented at least in relation to a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of a mobile network node within a wireless communication network; determining mobility event triggering conditions dependent on the determined measurement configuration; and providing an indication to the mobile network node or mobile access node of the measurement configuration and the mobility event triggering conditions, the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0070] According to various, but not necessarily all, exemplary embodiments of the present invention, a network access node is provided, comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the network node to at least: determine a measurement configuration to be implemented by a mobile network node in relation to at least a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of the mobile network node within a wireless communication network; determine mobility event triggering conditions dependent on the determined measurement configuration; and provide the mobile network node with indications of the measurement configuration and the mobility event triggering conditions, the measurement configuration and the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0071] According to various, but not necessarily all, exemplary embodiments of the present invention, a network access node is provided, comprising: components configured to determine a measurement configuration to be implemented by a mobile network node in relation to at least a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a location within a wireless communication network; components configured to determine mobility event triggering conditions dependent on the determined measurement configuration; and components configured to provide the mobile network node with indications of the measurement configuration and the mobility event triggering conditions, the measurement configuration and the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0072] According to various, but not necessarily all, exemplary embodiments of the present invention, a network access node is provided, comprising: circuitry configured to determine a measurement configuration to be implemented by a mobile network node in relation to at least a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a location within a wireless communication network; circuitry configured to determine mobility event triggering conditions dependent on the determined measurement configuration; and circuitry configured to provide the mobile network node with indications of the measurement configuration and mobility event triggering conditions, the measurement configuration and mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0073] According to various, but not necessarily all, exemplary embodiments of the present invention, a network access node method is provided, comprising: determining a measurement configuration to be implemented by a mobile network node in relation to at least a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of the mobile network node within a wireless communication network; determining mobility event triggering conditions dependent on the determined measurement configuration; and providing the mobile network node with an indication of the measurement configuration and the mobility event triggering conditions, the measurement configuration and the mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0074] According to various, but not necessarily all, exemplary embodiments of the present invention, a computer program product is provided that, when executed on a computer, is operable to perform the following steps: determining a measurement configuration to be implemented by a mobile network node in relation to at least a serving beam supported by a network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of the mobile network node within a wireless communication network; determining mobility event triggering conditions dependent on the determined measurement configuration; and providing the mobile network node with indications of the measurement configuration and mobility event triggering conditions, the measurement configuration and mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0075] According to various, but not necessarily all, exemplary embodiments of the present invention, a non-transitory computer-readable medium is provided, comprising program instructions stored thereon for performing at least the following: determining a measurement configuration to be implemented by a mobile network node in relation to at least a serving beam supported by a network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of the mobile network node within a wireless communication network; determining mobility event triggering conditions dependent on the determined measurement configuration; and providing the mobile network node with indications of the measurement configuration and mobility event triggering conditions, the measurement configuration and mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0076] Further specific and preferred aspects are set forth in the appended independent and dependent claims. Features of the dependent claims may be suitably combined with features of the independent claims, and in combinations other than those expressly set forth in the claims.

[0077] When a device feature is described as operable to provide a function, it should be understood that this includes device features that provide that function or are adapted or configured to provide that function. Attached Figure Description

[0078] Some exemplary embodiments will now be described with reference to the accompanying drawings, in which: Figure 1 This is an illustrative representation of an example high-speed train (HST) deployment using frequency range 2 (FR2) from the 3GPP standard (3GPP TR38.854); Figure 2 The example high-speed train is schematically shown in a one-way deployment, where the train's direction of travel is the same as the orientation of the serving beam; Figure 3 An example high-speed train unidirectional deployment is schematically shown, where the train's direction of travel is opposite to the orientation of the serving beam; Figure 4 The illustration schematically shows a bidirectional deployment of an example high-speed train; Figure 5 The diagram illustrates a wireless network deployment where rapid signal strength degradation may occur. Figure 6 The RSRP curves for the service RRH and the target RRH are shown graphically. Figure 7 The system-level mobility performance of a UE moving in the opposite direction to the serving beam in an HST deployment is illustrated in the diagram for the following: inter-cell mobility (left-hand side) and intra-cell beam handover (right-hand side). Figure 8 This is a signaling diagram illustrating one possible implementation of an embodiment of the subject matter described herein; Figure 9 This is a signaling diagram illustrating one possible implementation of an embodiment of the subject matter described herein; and Figure 10 A wireless network deployment is schematically illustrated, in which rapid degradation of signal strength may occur, and includes one possible implementation of embodiments of the subject matter described herein; Figure 11A and Figure 11B The illustration shows, in a more detailed manner, as follows: Figure 10 The wireless network deployment shown; Figure 12A and Figure 12B It shows from such as Figure 11A and Figure 11B Example beam pattern produced by the arrangement shown; Figure 13A and Figure 13B The RSRP curves and RSRP level differences between the main beam and the auxiliary beam according to an arrangement such as Figure 11 are illustrated. Figure 14The diagram schematically illustrates some components of a wireless communication network including nodes according to some arrangement; and Figure 15 The steps of a method performed at a node are illustrated schematically according to some arrangement. Detailed Implementation

[0079] Before discussing the example embodiments in more detail, an overview of some context in which the arrangement may be useful is first provided.

[0080] Regarding wireless communication networks, user equipment (UE) is configured to communicate with the core network via a radio link. As the UE moves within the network, radio coverage areas are provided to the UE by various types of transmit and receive points (TRPs).

[0081] Within a wireless communication network, there may be various methods for managing ongoing communications. In particular, there may be various methods to support ongoing communications between the UE and the network as the UE moves between different radio coverage areas.

[0082] The deployment recognizes that with the development of wireless communication technology deployment, scenarios have emerged that may not be well served by existing technologies. The deployment seeks to provide a mechanism that can address such scenarios and potentially improve overall network operation.

[0083] One such scenario involves a rapid degradation of the serving beam's signal strength, for example, at the beam edge or in the remote radio head (RRH) coverage area. Rapid signal strength degradation (especially when paired with a rapidly moving UE) can render conventional handover (HO)-based mobility technologies (including measurement reporting and HO signaling) insufficiently responsive to changing network conditions experienced by the UE and unable to adequately support ongoing communication between the UE and the network. Specifically, if the serving beam signal strength degrades rapidly such that the optimal target beam signal strength is significantly lower than the serving beam signal strength at the expected handover or transition location, the HO trigger threshold and measurements will not occur as expected, and the UE cannot switch communication from the serving beam to the target beam in a controlled manner. As a result of the rapid signal strength degradation, the UE leaves the coverage area supported by the serving beam, the communication link with the UE is lost, and a radio link failure (RLF) or HO failure occurs. The UE will then typically re-establish communication with the network (potentially with the target cell) via a radio resource control (RRC) connection establishment procedure. This re-establishment process requires time and resources, resulting in low network operational efficiency. It is understood that the scenario (in which rapid signal strength degradation occurs) can occur in relation to: handover between cells of a wireless communication network, and between cell beams, where a cell is supported by, for example, multiple beams.

[0084] Example deployments where rapid signal degradation may occur Figure 1 An example HST deployment using frequency FR2 is shown. In the HST scenario, the baseline deployment utilizes multiple cells deployed along a railway track. Each cell includes one or more Remote Radio Heads (RRHs) (also known as TRPs, Access Points (APs), or similar items), which provide the physical interface for transmitting / receiving data. In the following discussion, it is assumed that each RRH is equipped with an antenna panel.

[0085] The RRH is connected to a Distributed Unit (DU), which is configured to handle physical resource scheduling. To optimize deployment and minimize mobility disruptions, the cell's RRHs can be distributed along railway tracks. Dynamic Point Selection (DPS) is considered the baseline transmission scheme, meaning that at any given time, only one RRH in the cell is transmitting / receiving.

[0086] When operating at higher carrier frequencies, it is often necessary (and generally understood to be necessary) for the UE, the network, or both to utilize directional beamforming. Beamforming techniques can compensate for the high path loss that occurs at high frequencies. Using beamforming improves link budget and helps ensure effective, larger cell coverage. The application of beamforming techniques (or simply "beaming") introduces the directionality of uplink (UL) and downlink (DL) signals. Therefore, the UE attempts to manipulate its receive beam (Rx spatial setting) to have maximum receive gain (ideally, the UE Rx beam is directed towards the next-generation node base station gNB transmission Tx beam). Similarly, the network attempts to optimize its DL transmission beam by directing as much transmit power as possible towards the UE.

[0087] In the HST FR2 scenario, the deployment of RRH is hampered by an error! The reference source did not find the parameter representation shown, including: RRH station distance (D) S ); Distance from RRH station to railway tracks (D) min ); RRH antenna height (D) RRH,高度 ); UE / Customer Premises Equipment (CPE) (D UE,高度 );as well as The number of RRH sites connected to the public DU.

[0088] The parameters related to distance and height depend on the railway deployment scenario, which falls into two categories: open space deployment and tunnel deployment.

[0089] Deployment in open space Deployment in open spaces typically makes D RRH,高度 Much larger than D UE,高度 The distance from the RRH station to the railway tracks (D) min (Typically greater than 10 m.) Two example scenarios can be considered: Scene A: D min = 10 m, indicating that RRH is close to the track.

[0090] Scenario B: Dmin = 150 m, indicating that RRH is much farther from the orbit.

[0091] Tunnel deployment Due to the physical limitations of tunnel size, assume D RRH,高度 With D UE,高度 Comparable, and D min Smaller (RAN4 assumed to be D) min = 1 m), which means that RRH is adjacent to the orbit.

[0092] Other parameters (i.e., D) UE,高度 D S The number of RRH sites connected to the public DU is assumed to be the same for both deployment scenarios (i.e., D). UE,高度 = 5, D S = 700 m, with 1 to 4 RRHs connected per DU.

[0093] Typically, consider D min and D RRH,高度 This would necessitate the use of a certain number of beams at RRH and UE / CPE to provide sufficient coverage for all train locations along the track.

[0094] For example, 3GPP Radio Access Network (RAN) Working Group 4 (WG4) demonstrated that in open space scenario A and tunnel deployments, one beam per RRH panel and one beam per CPE / UE panel are sufficient to cover the track segment between two RRH sites. However, in open space scenario B, both RRH panels and CPE / UE panels may require more than one beam to provide adequate coverage for the track segment between two RRH sites.

[0095] Deployment at RRH stations along the track is assumed to fall into two main scenarios: One-way deployment In a unidirectional deployment, non-co-located RRHs are distributed along the track. All RRH panels face the same direction, meaning beams from all RRHs have the same orientation. Assume the UE / CPE is equipped with two panels: one facing forward and the other backward along the track. In a unidirectional deployment, assume only one UE / CPE panel can transmit / receive signals. Depending on the UE's direction of movement along the track, there are two possible scenarios: Figure 1 An example HST unidirectional deployment is illustrated schematically, where the train travels in the same direction as the serving beam orientation. Correspondingly, the train (and the associated UE) moves in a direction away from the serving RRH. This type of scenario is called a unidirectional “same” deployment.

[0096] Figure 3 An example HST one-way deployment is illustrated, where the train travels in the opposite direction to the serving beam orientation. When the train's direction of travel is opposite to the serving beam orientation, the train (and the associated UE) moves forward toward the serving RRH. This type of scenario is called a one-way "opposite" deployment.

[0097] Two-way deployment Figure 4 An example HST bidirectional deployment is illustrated schematically. In a bidirectional deployment, the RRHs are also distributed along the railway tracks. Under this arrangement, the two RRHs are co-located and configured such that their antenna panels face opposite directions. In some implementations, it is assumed that the two co-located RRHs belong to the same cell, i.e., connected to the same DU and sharing the same physical cell ID. In this deployment, it is assumed that the UE / CPE is also equipped with two panels—one facing forward along the track and one facing backward. In some arrangements, only one panel is active at any given time. Multi-panel reception is also possible. However, it is generally assumed that tunnel deployment operates such that the UE has only one active panel at any given time and uses DPS. Compared to unidirectional deployment, bidirectional deployment is expected to provide better coverage in terms of link budget because the UE is primarily served by the nearest RRH, which is typically less than 350 m away from the UE.

[0098] Mobility issues in HST deployment The aforementioned HST-related deployments lead to particularly challenging scenarios related to UE mobility. One such challenging scenario is a one-way “opposite” deployment, in which the RRH is positioned relatively close to the track, and the UE moves in the opposite direction to the serving beam orientation. Such deployments result in potential cell or beam handover issues.

[0099] The potential handover / beam switching issue arises from the sudden degradation of serving cell quality experienced by the UE when moving towards the serving beam in a unidirectional deployment. One reason is the rapid attenuation of received signal strength at the RRH beam coverage edge (nearby RRH) when the train travels in the opposite direction to the serving beam orientation. This effect can be observed in unidirectional and bidirectional open space scenarios A, as well as in HO-based and L1-based mobility in tunnel deployments.

[0100] The rapid deterioration of service quality in the community The arrangement described in this paper seeks to address mobility issues typically encountered in HST FR2 scenarios (as described above), but is also relevant to other equivalent high-speed deployments and potentially non-high-speed deployments (e.g., highways, metro, air-to-ground communication (AtG), and similar items), particularly at higher frequencies using beamforming signals, where: - The signal strength of the serving beam deteriorates drastically. For example, this can occur at the edge of the beam / RRH coverage area, resulting in conventional HO-based mobility (including measurement reporting and HO signaling) being unable to react quickly enough to the drastic degradation, and reliable communication links being lost before beam switching can occur. Therefore, conventional HO-based mobility does not provide a robust solution.

[0101] The same issues arise for beam handover between cells and for beam switching between RRHs (i.e., beam management processes in multi-TRP deployments).

[0102] The issues listed above will be discussed in more detail below. Although the discussion may focus on HST tunnel deployment scenarios, it can also be applied to other network deployments.

[0103] Figure 5 The diagram schematically illustrates a wireless network deployment where rapid signal strength degradation can occur. As mentioned above, potential mobility issues arise in HST network deployments when the UE moves in the opposite direction to the RRH Tx (transmit) beam. For example, error! No scenario illustrating a handover-based mobility mechanism was found in the reference source. A successful handover is expected in D s_offset Occurred at location D s_offset This is the handover point determined as the optimal location, at which the UE switches from the serving RRH beam to the target RRH beam based on a mobility method that seeks to maximize the signal-to-noise ratio (SNR) and / or reference signal received power (RSRP) from the detected beam. Specifically, in D s_offset To trigger a traditional HO event, the following conditions must be met:

[0104] in: = RSRP of the best SSB beam in the target cell = RSRP of the currently serving SSB beam in the serving cell; and “ offset_in_dB " is a predefined offset for event triggering (e.g., for event A3, typically..."). offset_in_dB = 3 dB) However, it has been observed that in some cases, at the expected switching point, the optimal target beam RSRP ( RSRP t It may be lower than the current serving beam RSRP ( RSRP S This is particularly evident in HST FR2 deployment scenarios, where the RRH is deployed close to the track (typically a tunnel deployment). This is because such deployments provide excellent coverage for areas close to the RRH, but this strong coverage suddenly drops due to the beamforming characteristics of the radio coverage area. In such scenarios, timely identification of the traditional HO triggering criteria (as described above) may not occur as expected, and the UE will not be configured to trigger a handover to the target beam until the serving beam coverage is effectively lost, leading to RLF or HO failure. A similar issue is seen with intra-cell beam handover, where timely beam handover triggering essentially does not occur until beam coverage is lost, resulting in intra-cell beam link handover failure.

[0105] Figure 6 and Figure 7 The results of a system-level simulation, in which rapid degradation of the source cell signal occurs, are illustrated in the figure.

[0106] Figure 6 The RSRP curves for the service RRH and the target RRH are shown graphically. Figure 6 The vertical lines in the diagram indicate the coordinates of the A3 trigger, the HO completion, the source RRH location, and the new cell selection coordinates. Figure 6An example of RSRP curves for the serving RRH (RRH1) and target RRH (RRH2) in an HST FR2 tunnel deployment is shown. It is observed that the signal level from the serving beam increases as the train (including the UE / CPE) approaches the source RRH1, and then drops sharply when the train is approximately 5 m from the source RRH1. It is also observed that a first A3 (handover / beam switching) event is triggered when the train is directly below the RRH and the serving beam no longer provides any radio coverage area from RRH1. Subsequently, the UE / CPE repeatedly attempts to trigger the A3 event to perform a HO (House of Interest) to a cell other than the optimal target cell, but fails to achieve a successful HO. This is understandable because the signal level of the serving beam from the source RRH1 has dropped to an unreachable level at the UE / CPE, meaning that successful communication between the network and the UE is no longer possible, resulting in the loss of any HO commands. After a period of communication "interruption," the UE / CPE is configured to initiate a procedure for cell selection to allow the UE to connect to a new cell.

[0107] Figure 7 The system-level performance of a UE moving in the opposite direction to the serving beam in an HST deployment is illustrated in the diagram for the following: inter-cell mobility (left-hand side) and intra-cell beam handover (right-hand side).

[0108] Figure 7 The mobility performance of two unidirectional deployment scenarios in HST FR2 tunnel deployment, representing "opposite" and "identical" scenarios, is illustrated graphically. A relatively realistic (non-ideal) model of the Physical Downlink Control Channel (PDCCH) with a moderate level of aggregation is used to simulate and evaluate possible mobility performance in practice, as the PDCCH carries HO commands and is prone to errors under low SINR conditions. Both HO-based (L3 mobility or inter-cell mobility) and beam-switching-based (L1 mobility or intra-cell mobility) mechanisms are considered. Results are presented using different discontinuous reception (DRX) periods. Longer DRX periods result in longer RRC / L1 RSRP measurement periods and cell detection delays.

[0109] As can be seen, UEs / CPEs moving on trains in the opposite direction to the serving beam exhibit poor mobility robustness. Even in the best-case scenario without DRX, HO failures still occur approximately 50% of the time for HO-based mobility events and over 25% of the time for beam-switching-based mobility events. Such failure rates are unacceptable in commercial deployments, and Figure 7The simulation results lead to the following conclusions: In the modeled deployment scenario, traditional techniques cannot provide usable and robust mobility. However, no mobility failures are observed when the UE / CPE is located on a train moving in the same direction as the beam orientation.

[0110] Methods for addressing rapid degradation of service beams The arrangement can provide an alternative mechanism to trigger mobility events, thereby supporting ongoing communication between the network and the UE as the UE moves between different radio coverage areas within the network. The arrangement can provide a method that supports "early" triggering of mobility events, such as handover events or beam switching. This early triggering, based on the conditions set for mobility event triggering, results in a higher probability of success for mobility events compared to those triggered in a conventional manner, especially in cases of rapid changes in the signal strength of the serving beam.

[0111] In particular, some deployments can provide a beamforming-based deployment method that can effectively assist in UE location detection. The beamforming-based deployments described herein enable them to support configuration and triggering mechanisms based on deployment mobility events (e.g., HO / beam switching).

[0112] Some arrangements allow the UE to be configured to utilize a set of measurement criteria to detect whether it is located within the network at a location where an early HO / beam handover is expected. These measurement criteria are related to triggering appropriate mobility events (such as beam handover or cell change). These measurement criteria are related to measurements of the following(s): the current serving RRH / cell beam, the secondary beam, and (optionally) the target beam. Criteria are set according to these measurements to determine whether the UE is suitable for handover (or transfer) to the target beam.

[0113] Depending on some arrangements, multiple mechanisms can be implemented to enable UE operation to determine when to activate a mobility event to switch from a serving beam to a target beam based on a set of measurement criteria. In one possible example implementation, the RRH can be configured to operate or support more than one "serving" beam. The UE can be configured to compare, for example, the quality or signal received from each configured beam. For example, if the RRH operates to support providing more than one beam, and the current RRH (cell) has multiple serving beams with appropriate beam orientation and coverage, the UE, depending on the arrangement, can be configured to measure indicators of quality signal strength or similar parameters associated with the beam received at the UE. These indicators can be determined in relation to the current UE serving beam and at least one additional available beam (e.g., a detection auxiliary beam). The criteria associated with these measured indicators can be used as triggers for mobility events, such as beam changes to a target RRH.

[0114] Depending on the configuration, multiple mechanisms can be implemented to enable UE operation to determine when to activate a mobility event to switch from a serving beam to a target beam based on a set of measurement criteria. In one possible example implementation, the remote radio head (RRH) may not be configured to support multiple serving beams (such examples include high-speed train deployments) or to support an appropriate beam (e.g., in terms of direction or coverage) to support mobility events in situations where the signal strength of the serving beam expected to be received at the UE may experience rapid degradation. In some configurations, the operation of the current serving RRH can be adapted to provide and support an appropriate so-called detection auxiliary beam.

[0115] The detection assist beam allows it to have the desired direction and appropriate coverage. The network or RRH can be configured to send or transmit flags or other indicators to the UE that can be used to infer that the detection assist beam can only be used for beam handover / cell handover triggering purposes, and not for data transmission, beam failure recovery (BFR), or radio link failure recovery (RLF). For example, in relation to HST deployment, the RRH can be configured to support the main lobe of the detection assist beam, pointing towards an area near the source RRH (i.e., the RRH supporting the currently serving beam). This area near the source RRH is the expected handover area location and can be located approximately 5-10 m from the source RRH. The UE can be configured such that measurements of the signal from the detection assist beam can be used in conjunction with measurements of the main beam (i.e., the currently serving beam) to assess whether criteria for achieving mobility events are met. In this way, the UE is configured to identify the appropriate time / location at which to perform or initiate a beam handover or handover to the target beam.

[0116] The deployment recognizes that conventional UE mobility behavior is insufficient to adequately detect or prevent radio link failures or beam link failures when the received serving beam signal level drops sharply and immediately without warning during operation. Accordingly, the deployment recognizes that an additional beam (“detection auxiliary beam”) can be used to trigger appropriate mobility criteria. Monitoring the additional beam can help detect and prevent potential radio link failures or beam link failures.

[0117] Depending on some arrangements, the UE can be configured to perform detection, measurement, and (optionally) reporting (attached to, for example, detection, measurement, and reporting in relation to the serving beam and potential target beam). The detection auxiliary beam can provide a radio coverage area that is directed or positioned such that the UE detects the beam at the location where it is expected to begin switching from the serving beam to the target beam.

[0118] Depending on the configuration, the node or TRP supporting the detection auxiliary beam can be configured to provide the detection auxiliary beam in a manner that enables a UE with appropriately selected triggering criteria to switch to the target beam in a timely manner to prevent radio link failure or beam link failure. Regarding the provision of the detection auxiliary beam, it is understood that one or more deployment factors may need to be considered, such as the angle of the detection auxiliary beam, the distance to the serving TRP, and similar factors.

[0119] Regular mobility events configure the UE to initiate mobility events by measuring and reporting in relation to the serving cell and one or more candidate target cells (or beams). If a target cell / beam provides a “better” signal than the serving cell / beam, the UE is configured to take steps to switch the communication link to the target cell / beam providing the better signal. In contrast, a mechanism is configured such that if the UE detects a “better” signal from a detection auxiliary beam, it does not switch to communication supported by that beam, but instead switches to the target RRH / gNB’s cell / beam.

[0120] To effectively implement mechanisms based on various deployments, some adaptations may be required in UE and TRP operations. In particular, changes may be necessary at the UE and, for example, at network access nodes such as gNB, serving RRH / gNB, and target gNB / RRH.

[0121] For example, to support the layout, it may be helpful to implement some or all of the following: - Network Node / gNB Capability Indicator: This is configured to inform nodes in the network that the network node can support operation according to the arrangement. In other words, it is a mechanism for informing other network nodes and / or UEs of the detection auxiliary beam capability at the network node. Accordingly, when a network node receives a similar capability indicator or confirmation of the capability indicator from the UE to support the proposed solution, the network node can be configured to apply and begin operation according to the arrangement.

[0122] - UE Capability Indicator: This is configured to indicate that the UE is capable of supporting operations according to the arrangement. The UE may provide such a capability indicator to the network. If the network receives the indicator, it may operate to allow network nodes communicating with the UE to operate according to the arrangement.

[0123] - Information elements (e.g., included in signaling messages). Such information elements may include the following configurations: measurements, measurement reports, and / or other cell / beam handover operation parameters. This configuration enables the UE to effectively perform detection and reporting in relation to the detection auxiliary beam. This information element allows the UE to apply appropriate mobility triggers related to cell / beam handover from the serving beam to the target beam based on measurements, including those related to the detection auxiliary beam.

[0124] - Additional information elements (e.g., included in the signaling message). These additional information elements can be operated to instruct the UE that the beam be used as a detection auxiliary beam, rather than for normal communication.

[0125] -UE, which can be configured to receive information elements and / or other information elements (such as those indicated above) and operate according to the parameters set in these information elements.

[0126] - A network control node (e.g., a gNB or similar node) can be configured to allocate the aforementioned information elements and / or other information elements and share them with other network nodes (e.g., UEs, source nodes, and target nodes).

[0127] After providing a general overview of the methods for arranging the layout, a more specific description of the possible arrangements is now provided.

[0128] The deployment seeks to implement mechanisms to improve mobility / beam handover robustness when the quality of the serving cell deteriorates rapidly, leaving the network insufficient time to trigger a home-of-house (HO) / beam handover to a new cell. The deployment seeks to define a novel approach that operates to trigger HO / beam handover earlier than conventional mobility methods, thereby helping to ensure an improved success rate of HO / beam handover.

[0129] Specifically, the deployment can provide a beamforming-based deployment method that can assist in detecting the UE's location. The deployment also provides an alternative HO / beam switching configuration and triggering mechanism, as described below.

[0130] To detect whether the UE is in an appropriate location in the network deployment to enable HO / beam handover, the UE can be configured to use the measurement difference between the current serving RRH / cell beam and at least one other beam (which is not the target beam) to determine the appropriate handover to another RRH (cell).

[0131] Understandably, this general approach can be implemented in various ways. As a first example, if the current RRH (cell) has multiple serving beams with appropriate beam orientation and coverage, the UE can be configured to measure and calculate the quality (e.g., RSRP) difference between the current serving beam and the additional available beam (using the additional available beam as a location assist beam or beam switching assist beam), and then use the calculated difference as a potential trigger for mobility events (e.g., beam change to the target RRH).

[0132] As a second example, if the current serving RRH (cell) does not have multiple serving beams (e.g., in high-speed train deployments) or does not have a suitable beam (e.g., in terms of direction or coverage), the current serving RRH can operate to configure an auxiliary beam with the desired direction and / or coverage. The network can operate to send a flag (indicator) to a UE operating in the area to indicate that the auxiliary beam can only be used for beam / cell handover and not for legacy data transmission, beam failure recovery (BFR), or RLF. As an example, in an HST FR2 deployment, the RRH can be configured to provide an auxiliary beam whose detected main lobe points towards an area close to the source RRH. In other words, the auxiliary beam is provided in the intended handover area to support mobility from the source beam to the target beam. In the HST FR2 scenario, the auxiliary beam can point to an area 5-10 meters from the source RRH. The UE can be configured to use measurements of the auxiliary beam and the main beam (current serving beam) to identify whether a mobility event, such as beam handover / HO, is initiated.

[0133] According to the configuration, the network can operate to configure the UE to perform the following measurements: the current serving beam, the secondary beam, and (optionally) the target beam. This configuration may be related to the identifier of a mobility event. This configuration may be related to triggering conditions associated with a mobility event detected by the UE. According to some implementations, this configuration may include at least some of the following information: When to begin measuring the auxiliary beam.

[0134] Depending on UE capabilities and network configuration, for example, one of the following can be applied: Auxiliary beam measurement can begin from the time the UE switches to the current serving beam, or it can begin after X milliseconds of remaining on the current serving beam. Alternatively, auxiliary beam measurement can be initiated if the signal quality indicator received at the UE from the auxiliary beam exceeds a threshold. For example, it can begin from a time when the quality of the serving beam is above a threshold (for serving beams positioned in the opposite direction to the UE's movement) or below a threshold. Alternatively, auxiliary beam measurement can be initiated when the target beam has a received signal quality indicator at the UE that is above a certain threshold. Alternatively, auxiliary beam measurement can be initiated when the angle of arrival (AoA) of the current serving beam or the target beam is above / below a certain threshold.

[0135] Configurations, depending on some implementation, may include at least some of the following information: measurement period; and / or the resource to be measured; and / or measurement quality indicator (e.g., RSRP, RSRQ, SINR, or AoA); and / or measurement type (L1 or L3 measurement); and / or measurement accuracy; and / or measurement duration.

[0136] The network can operate to configure the UE to perform one or more actions based on measurement results set in the configuration related to: the current serving beam, the detection auxiliary beam, and (optionally) the target beam. Based on a specific application of the techniques and mechanisms described herein, the actions can be configured as follows: If the serving RRH and the target RRH belong to two different cells (i.e., traditional HO or CHO scenarios): The UE can be configured to send initial measurement results (or an indication that the measurement results meet a certain threshold) to the network as a trigger for HO preparation.

[0137] In the case of a traditional HO, the UE can be configured to send a measurement (or measurement result indication) to trigger a final HO command or activate resource reservation at the target cell.

[0138] Under condition HO, measurement conditions can be provided to the UE to trigger a cell handover to the target cell. As an example, the UE can be configured to handover to the target cell under the following conditions: (RSRP 主服务波束 - RSRP 检测辅助波束 ) < threshold 1, and (RSRP 目标小区 Threshold 2 For UEs with AoA measurement capability, the CHO condition can be expressed by the formula: (AoA 主服务波束 - AoA检测辅助波束 > threshold 3, and (AoA 目标小区 > Threshold 4. As an alternative, a combination of AoA and RSRP, or other signal quality indicator thresholds, can be applied.

[0139] Understandably, depending on the possible implementation, the measurement used for evaluation can be an instantaneous value or a filtered (averaged) value.

[0140] The thresholds mentioned above can be implementation-specific. In particular, they can depend on, for example, a specific deployment.

[0141] If the serving RRH and the target RRH belong to the same cell (i.e., beam switching scenario): The UE can be configured to trigger a measurement report for beam switching under conditions such as the following: (RSRP main serving beam - RSRP detection auxiliary beam) < threshold 1, and (RSRP 目标波束 > Threshold 2. (Or AoA condition, or a combination of conditions (as described above regarding CHO applications)) As an alternative to sending measurement reports, the UE can be configured to send beam switching indications to the network.

[0142] When the measurement conditions are met, the UE can be configured to send an indication to the network regarding the reservation / preparation of target beam resources.

[0143] In some configurations, the UE can be configured to switch to the target beam when measurement conditions are met (applicable when UL / DL resources are provided to the UE).

[0144] Overall, the arrangements and mechanisms described in this paper can provide some of the following advantages: The arrangement can support UE location detection, allowing CHO / beam switching to be triggered based on specific beam detection settings and simple beam signal quality measurements. This approach differs from methods that rely on timing / frequency information to estimate UE location (which can be challenging and inaccurate).

[0145] The arrangement allows the conditions for triggering HO / beam switching to be largely independent of channel conditions, and can be calculated based on antenna panels and beam configurations (i.e., number of antennas, beam main lobe angle) such as TRP or RRH.

[0146] The configuration allows the setup and triggering mechanisms for HO / beam switching to be set up so that the network and UE can quickly switch to the optimal target cell / beam before the serving signal experiences a drastic quality degradation (which could hinder a successful and smooth serving cell change).

[0147] Example signaling diagram Figure 8 This is a signaling diagram illustrating one possible implementation of an embodiment of the subject matter described herein. Figure 8 The signaling between user equipment 100 and two remote radio heads RRH 200A and 200B is shown. Both RRHs support beaming in the same cell (cell #n).

[0148] In other words, Figure 8 An example of the signaling process for beam switching scenarios within a cell is shown.

[0149] Step A1: UE 100 is in RRC connection mode and using a beam supported by RRH1 200A.

[0150] Step A2: The network can determine which is suitable for activating detection beam assist associated with UE 100 and RRH 200A. This activation decision can be based, for example, on measurements of the current serving beam / target beam at the UE, or on indications from the UE based on measurement / mobility conditions.

[0151] Step A3: The network sends an appropriate beam switching measurement configuration to the UE 100 via the RRH1 200A. In this implementation, the configuration includes (multiple) related indications and (multiple) related configurations to be used in relation to the detection auxiliary beam.

[0152] Step A4: The network provides the UE with a cell handover (HO) measurement configuration via RRH1 200A, which includes, for example, serving beam conditions, detection auxiliary beam conditions and target beam conditions, as well as the corresponding UE actions.

[0153] Step A5: The network provides the UE with beam switching measurement configuration via RRH1 200A. This configuration includes, for example, serving beam conditions, detection auxiliary beam conditions, and target beam conditions, as well as the corresponding UE actions.

[0154] For example: When (RSRP) 主服务波束 - RSRP 检测辅助波束 When (RSRP target cell) < threshold 1 and (RSRP target cell) > threshold 2, the UE can be configured to: trigger a measurement report; send an indication (e.g., a beam switching indication); and / or switch to the target beam supported by RRH2 200B.

[0155] Step A6: The UE can perform (multiple) appropriate measurements and determine whether any measurement conditions (including detection-assisted beam measurements and evaluations) are met.

[0156] Step A7: If the relevant conditions are assessed to be met, the UE can be configured to transmit a measurement report or beam switching indication to the network (via sending a message to RRH1 200A).

[0157] Step A8: Additional or alternative, if the relevant conditions are assessed to be met, the UE can be configured to switch to the target beam supported by the RRH2 200B.

[0158] Figure 9 This is a signaling diagram illustrating one possible implementation of an embodiment of the subject matter described herein. Figure 9 The signaling between user equipment 100 and two remote radio heads RRH 200A and 200B is shown. These two RRHs support beamforming in different cells (cell #m and cell #n, respectively). In other words, Figure 9 An example implementation of the signaling flow related to the Conditional Handover (CHO) application is shown.

[0159] Step B1: UE 100 operates in RRC connection mode via a beam supported by RRH1 200A.

[0160] Step B2: The network determines that it is appropriate to activate the detection beam assist procedure. This activation may be based on (measurements) of the current serving beam / target beam, or on indications from the UE based on measurement or mobility conditions.

[0161] Step B3: The network provides the UE 100 with the required cell handover measurement configuration, which includes relevant configurations for detecting beam assist conditions.

[0162] Step B4: The network provides the UE with the initial cell handover measurement conditions and corresponding UE actions via the RRH1 200A. In one example, such conditions and actions may include: When (RSRP) 主服务波束 - RSRP 检测辅助波束 ) < threshold 1 and (RSRP) 目标小区 When the threshold is greater than 2, the UE can be configured to: trigger a mobility measurement report; and / or send an indication (e.g., a cell handover indication).

[0163] Step B5: The UE can perform (multiple) appropriate measurements and determine whether the initial measurement conditions are met (including detection auxiliary beam measurements and evaluation).

[0164] Step B6: If such conditions are met, the UE can be configured to send an appropriate measurement report to the network (RRH1-200A).

[0165] Step B7: The network can decide to implement CHO based on the measurement report received from the UE.

[0166] Step B8: The network takes steps to prepare the target cell supported by RRH2 200B for CHO.

[0167] Step B9: The network can be configured to provide CHO configuration and execution conditions to UE 100 (via RRH1 200A), for example: When (RSRP) 主服务小区波束 - RSRP 检测辅助波束 ) < threshold 3 and (RSRP) 目标小区 When the threshold is greater than 4, the UE can perform conditional handover to cell #n supported by RRH2 200B.

[0168] Step B10: UE 100 can be configured to perform the CHO-related measurements described in step B9 and evaluate whether the CHO execution conditions (including detection-assisted beam measurement and evaluation) are met.

[0169] Step B10: If the CHO condition set by the network is determined by the UE to be met, the UE can be configured to take steps to switch to communicating with the network via a target cell supported by RRH2 200B.

[0170] Specific implementation examples in HST FR2 tunnel deployment The following describes an example implementation of a deployment to address the specific mobility issue described above. Specifically, the described implementation involves HST FR2 tunnel deployment (when the train (and therefore the UE / CPE on the train) moves in a direction opposite to the beam orientation of the RRH). A detailed implementation will be described, including the deployment of the RRH Tx beam, the configuration of the solution, and the method used to define the trigger threshold. Furthermore, some analysis is provided on how this implementation addresses the identified mobility issue.

[0171] Figure 10 A wireless network deployment is schematically illustrated, in which rapid degradation of signal strength may occur, and includes one possible implementation of embodiments of the subject matter described herein.

[0172] Figure 10The RRH transmit (Tx) beam deployment is schematically illustrated. Each tunnel-RRH (RRH1, RRH2) operating according to this arrangement can be configured to provide two beams: a primary beam 300 and an auxiliary beam 400. Transmit characteristics are set such that the main lobe of one beam (the primary serving beam) of each RRH is parallel to the train track. The primary beam 300 provides the primary communication connection to the UE / CPE 100. Each RRH supports an additional beam (detection auxiliary beam). The detection auxiliary beam 400 is configured such that its main lobe, in this implementation, points to an area near the supporting RRH. Generally, the auxiliary beam 400 points to a desired "handover area," which, in this implementation, may be approximately 5-10 m from the source RRH. Generally, the auxiliary beams 400 are configured to point towards or toward a location slightly earlier than the expected location of rapid degradation of the serving beam signal, such that UE detection of the auxiliary beam can be used to help avoid mobility event failures due to rapid degradation of the serving beam signal.

[0173] exist Figure 10 In the implementation shown, beam identification can be based on a Synchronization Signal Block (SSB) or a Channel State Information Reference Signal (CSI-RS). When UE 100 is still far from the source RRH 200A, the RSRP level of the primary beam 300A is greater than the RSRP level of the detection auxiliary beam 400A. As UE 100 approaches the source RRH 200A, the RSRP level of the detection auxiliary beam 400A will increase and become comparable to, or even exceed, the primary serving beam 300A. By tracking the level difference between the two beams (300A and 400A), the network and / or UE can determine whether mobility events (such as HO or beam switching) should be triggered.

[0174] The following describes the configuration of one possible implementation based on the arrangement and the HO / beam switching triggering mechanism.

[0175] For a CHO-based mobility scenario, assume the communication network includes RRH1 200A belonging to cell #1 and RRH2 200B belonging to cell #2. Each RRH 200 deploys two Tx beams (300 and 400, the main beam and detection auxiliary beam, respectively). UE 100 can operate in connected mode and is served by the main beam 300A of RRH1 200A. Depending on the configuration, the network can configure UE 100 to, for example: (i) measure all beams, i.e., the 300A beam of RRH1 200A. RRH1,主 and 400A beam RRH1,辅助 And the 300B beam of the RRH2 200B. RRH2,主 and 400B beam RRH2,辅助UE 100 can be configured to generally only work with the 300A beam. RRH1,主 and 300B beam RRH2,主 Report accordingly. The UE can be configured to be aware of the 400A beam. RRH1,辅助 and 400B beam RRH2,辅助 These are the 300A beams. RRH1,主 and 300B beam RRH2,主 Coupled or associated auxiliary beams. The network can provide the UE with an offset for the received signal quality indicator. threshold 1. For example, the RSRP level difference between the main beam and the auxiliary beam, and the actions to be triggered when the conditions(s) are met.

[0176] Furthermore, depending on the implementation method, the configuration for implementing CHO can be provided to the UE, for example, via RRC signaling; that is, UE 100 can be configured to (300A RSRP) 主服务波束 - 400A RSRP 检测辅助波束 When (300B RSRP target cell) < threshold 1 and (optionally) (300B RSRP target cell) > threshold 2, trigger a CHO to target cell #2.

[0177] In this way, the UE can be configured to continuously monitor and evaluate, for example, the RSRP level difference between two beams from the same RRH. When the triggering condition is met, the UE can be configured to perform a Conditional Handover (CHO) to the optimal or known target cell (provided the network deployment and mobility therein are sufficiently constrained). Because the auxiliary beam 400 is properly placed, latency for mobility events can be mitigated, as the signaling for establishing the conditional handover can be executed via the link before the link through the serving beam rapidly deteriorates. In other words, the placement of the auxiliary beam helps ensure that the signaling supporting the CHO is likely to have been successfully configured before the serving beam deteriorates. It can be understood that the minimized mobility latency stems from the use of the CHO itself, because the UE has already received the configuration for the target cell before the link becomes unavailable (as a result of successful signaling). When the CHO triggering condition is met, the UE immediately hands over to begin communication with the target cell. Depending on the implementation of some arrangements described herein, detecting the auxiliary beam can be used as part of providing the triggering condition.

[0178] In the case of beam switching, the same configuration as described above can generally be applied. Assume that RRH1 200A and RRH2 200B belong to the same cell, and the handover between the main beams supported by RRH1 and RRH2 is accomplished through intra-cell mobility or beam switching. UE 100 can connect to RRH1 via main beam 300A and be configured similarly to the CHO-related example described above.

[0179] UE 100 can be configured to maintain monitoring of the signal quality indicator (e.g., RSRP level difference) between the primary beam 300A and the secondary beam 400A until a beam switching condition is met (i.e., in the same manner as described above for CHO). If the beam switching condition is met, UE 100 can be configured to trigger an action according to the provided configuration. In one example, the UE can trigger a measurement report, wherein the UE reports the measurement for beam 300B. RRH2,主 The RSRP uses a 400A beam. RRH1,辅助 The RSRP value. In this sense, a 300B beam with a "pseudo" level. RRH2,主 (Actually, the auxiliary beam 400A) is now close to the level of the main serving beam 300A, thus allowing for faster triggering to the 300B beam. RRH2,主 Beam switching. Alternatively, UE 100 can be configured to send a beam switching indication to the network when a trigger condition is detected.

[0180] exist Figure 10 In the implementation shown, the use of the auxiliary beam can be activated and a decision can be made to trigger the detection of the auxiliary beam configuration in HST FR2, which can be based on HighSpeedConfigFR2-r17 Network indications, for example, highSpeedMeasFlagFR2-r17 Configured and set as Set1 (That is, using 2 receive (Rx) beams on the UE side). This signal implicitly indicates that the RRH is deployed near the railway track. If a tunnel-specific indication is subsequently agreed upon, it can be used to trigger the beam-assisted procedure.

[0181] If indicators or conditions related to the deployment scenario are met, the network can be configured to check or otherwise determine whether the detection of auxiliary beam configuration is required for HO / beam switching applications, such as based on the detection of the UE's direction of movement, for example, by determining a sequence of previous RRHs or beam changes experienced by the UE / CPE. If the direction is determined to be "opposite," the network can be configured to activate the operation of detecting the auxiliary beam configuration arrangement as described herein.

[0182] Threshold for RSRP level difference The following section provides further details on one possible implementation of the arrangement, based on the measurement of the RSRP level difference threshold between the primary and secondary beams supported by the same TRP as a trigger for mobility events. While the principle of this arrangement can also apply when the primary and secondary beams are supported or provided by different RRHs in the network, certain specific characteristics may suggest that it can be advantageous for the primary and secondary beams to be provided by the same RRH.

[0183] One advantage of this "same source" implementation of the described arrangement principle is that providing and configuring the main and auxiliary beams supported by the same TRP allows for the selection of an RSRP level threshold trigger that accurately reflects the UE distance to the beam source RRH. This threshold value will be independent of the channel conditions experienced by the UE along the track and can be calculated given the antenna array configuration (i.e., the number of antennas and beam pattern) and the detected auxiliary beam main lobe angle (which defines the expected switching point).

[0184] These characteristics stem from the following property of beams formed from the same antenna panel: for a given angular direction (whether from the RRH's perspective or the UE's perspective), the beamforming gain difference between two beams formed from the same panel is constant. This originates from the physical characteristics of phased array (beamforming) antennas. The channel conditions between the RRH and the UE can be assumed to be the same for both beams, as they transmit through the same channel, meaning that the difference in RSRP levels is primarily due to the beamforming gain at the considered angular direction.

[0185] Since the threshold for the level difference between two beams depends only on the beamforming configuration, it can be calculated given the antenna panel settings and information related to the orientation of the primary serving beam and the detection auxiliary beam.

[0186] The following simulation results confirm this analysis. The HST FR2 tunnel deployment is used as an example, but in general, the same approach can be applied to other scenarios applicable to the underlying concepts of the various arrangements described.

[0187] Figure 11A and Figure 11B A wireless network deployment is schematically illustrated, in which rapid degradation of signal strength may occur, and includes one possible implementation of embodiments of the subject matter described herein. Figure 11A and Figure 11B The diagram illustrates one possible deployment for RRH1. It assumes that the RRH's antenna panels are configured with a rectangular 8×8 element phased array antenna for each polarization. Two Tx beams are configured to be supported by the antenna array: the primary serving beam 300 points towards the shadow area of ​​the adjacent RRH's serving beam, a typical FR2 HST train deployment; the detection auxiliary beam 400 points towards a region or area 500 near the RRH's location, where d S_偏移 Define the expected area 500 that is suitable for triggering mobility events such as beam switching / HO. Figure 11A A side view of such a deployment is schematically shown, and Figure 11B A floor plan of such a deployment is shown schematically.

[0188] In HST FR2 tunnel deployment, due to the relatively small height difference (H) between the RRH and the UE / CPE, the main beam 300 and / or the antenna line of sight will be essentially parallel to the track, i.e., the vertical-horizontal angle is 0 degrees. For the detection auxiliary beam 400, it is assumed that the main lobe will be configured with θ in the vertical direction relative to the antenna line of sight. A Degree and will be configured in the horizontal direction. .

[0189] Angle direction and It can be approximately calculated as follows:

[0190] According to the RAN4 protocol, D min = 1 m, D RRH,高度 = 5.3 m, D UE,高度 = 5 m, therefore H = 0.3 m. From this, we can assume: If D S_偏移,1 = 10 m, then respectively, θ A =1.72 degrees and φ A =5.71 degrees; If D S_偏移,2 = 5 m, then respectively, θ A =3.43 degrees and φ A =11.31 degrees.

[0191] Figure 12A and Figure 12B It shows the composition of, for example Figure 11A and Figure 11B The example beam pattern produced by the arrangement shown is illustrated in Figure 12. For the beam vertical and angular directions described above with respect to Figure 11 and the given antenna configuration, the resulting beam pattern is shown in Figure 12. Figure 12A The resulting beam pattern in the vertical direction is illustrated in the diagram, and Figure 12B The resulting beam pattern in the horizontal direction is illustrated.

[0192] As shown in Figure 12, “DA beam D” S_偏移,1 " indicates that it corresponds to D S_偏移,1 The detection-assisted (AD) beam, and the "DA beam D" S_偏移,2 " indicates that it corresponds to D S_偏移,2 The AD beam. It should be noted that the antenna pattern results are based purely on the antenna array characteristics and do not take into account any channel and Rx beam effects.

[0193] As can be seen from Figure 12, there is almost no gain difference in the vertical direction because the vertical angles for different beams are quite similar. However, the gain difference in the horizontal direction is significant. It can be observed that: exist φ A At 0 degrees (corresponding to the main beam), the main beam intersects with the DA beam. S_偏移,1 The beamforming gain difference between them is 2dB; exist φ A At 0 degrees (corresponding to the main beam), the main beam intersects with the DA beam. S_偏移,2 The beamforming gain difference between them is 12dB.

[0194] These two observations can be used to generate appropriate gain difference values ​​between each auxiliary beam and the main beam when the UE is far from the RRH, i.e., when the UE is roughly located along the track and appears to be basically aligned with the direction of the main beam.

[0195] When the UE approaches RRH, the gain difference will decrease, and when the UE is located at D... S_偏移 At a distance: exist φ A =5.71 degrees (corresponding to D) S_偏移,1 At a detection assist (AD) beam of 10 m, the beamforming gain difference is approximately -2 dB; exist φ A =11.31 degrees (corresponding to D) S_偏移,2 At a detection assist (AD) beam of 5 m, the beamforming gain difference is approximately -12 dB.

[0196] To further verify the above observations, system simulation results were performed, taking into account the effects of the channel, Tx beam, and Rx beam.

[0197] Figure 13A and Figure 13B The RSRP curves and RSRP level differences between the main beam and the auxiliary beam according to an arrangement schematically shown in Figure 11 are illustrated. Figure 13A Involving D S_偏移,1 = 10 m layout, and Figure 13B Involving D S_偏移,2 = 5 m layout.

[0198] As expected, what was observed was similar to the beam pattern results.

[0199] Figure 13A As shown, for those with D S_偏移,1= 10 m beam setup: When the UE is far from the RRH, the RSRP level difference is approximately 2 dB. When the UE is 10 m away from the RRH, the RSRP level difference is approximately -2 dB.

[0200] Figure 13B As shown, for those with D S_偏移,2 = 5 m beam setup: When the UE is far from the RRH, the RSRP level difference is approximately 12 dB. When the UE is 5 m away from the RRH, the RSRP level difference is approximately -12 dB.

[0201] Furthermore, in all cases, the RSRP curves of the main beam and the auxiliary beam exhibit similar trends.

[0202] Simulation results confirm the analysis and discussion, namely that the RSRP level difference can be derived from the antenna panel configuration and the expected handover point, and is independent of channel variations. Therefore, it is expected that if the UE operates according to the described arrangement, it can effectively and accurately estimate the distance to the serving RRH based on auxiliary beam detection, thereby triggering HO / beam handover in a timely manner. For example, from... Figure 13B It can be seen that if the network expects the UE to perform cell change / beam handover at a distance of 20 m from the source RRH, the RSRP level difference can be set to 5 dB for the trigger condition.

[0203] Figure 14 The schematic diagram illustrates some components of a wireless communication network including nodes according to some arrangement; and Figure 15 The steps of a method performed at a network node are illustrated schematically according to some arrangement.

[0204] Figure 14 The diagram schematically illustrates some components of a network including nodes according to a certain arrangement. Network 1000 includes multiple network access nodes 1200 that communicate with user equipment 1100. The network access nodes may communicate with network control node 1300.

[0205] User equipment 1100 takes the form of an apparatus, including: a component 1110 configured to receive an indication of a detection auxiliary beam associated with a serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting a mobile network node's location within a wireless communication network; a component 1120 configured to receive an indication of a measurement configuration and an indication of mobility event triggering conditions, the measurement configuration being implemented by the network node in relation to at least the serving beam and the associated detection auxiliary beam, the mobility event triggering conditions depending on the indicated measurement configuration; a component 1130 configured to perform a measurement according to the measurement configuration; a component 1140 configured to evaluate whether the mobility event triggering conditions have been met based on the performed measurement; and a component 1150 configured to execute a mobility event associated with the mobility event triggering conditions based on the evaluation.

[0206] The network access node 1200 takes the form of an apparatus, including: a component 1210 configured to determine a measurement configuration to be implemented by a mobile network node in relation to at least a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of the mobile network node within the wireless communication network; a component 1220 configured to determine mobility event triggering conditions dependent on the determined measurement configuration; and a component 1230 configured to provide an indication of the measurement configuration and mobility event triggering conditions to the mobile network node 1100, the measurement configuration and mobility event triggering conditions being associated with the serving beam supported by the network access node and the associated detection auxiliary beam.

[0207] The network control node 1300 takes the form of an apparatus, including: a component 1310 for determining that conditions for achieving mobility of a detection auxiliary beam at a network access node are met; a component 1320 for determining a measurement configuration, the measurement configuration being implemented at least in relation to a serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in detecting the location of a mobile network node within a wireless communication network; a component 1330 for determining mobility event triggering conditions dependent on the determined measurement configuration; and a component 1340 for providing an indication of the measurement configuration and mobility event triggering conditions to the mobile network node 1100 or the mobile access node 1200, the mobility event triggering conditions being associated with a serving beam supported by the network access node and an associated detection auxiliary beam.

[0208] Figure 15 The steps of a method performed at some network nodes are illustrated schematically.

[0209] User equipment 1100 can be configured to perform a method including the following steps: 5110: Receive indication of a detection auxiliary beam associated with the serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in the detection of mobile network nodes located within the wireless communication network; 5120: Receive an indication of measurement configuration and an indication of mobility event triggering conditions, wherein the measurement configuration shall be implemented by the network node in relation to at least the serving beam and the associated detection auxiliary beam, and the mobility event triggering conditions depend on the indicated measurement configuration; 5130: Perform the measurement according to the measurement configuration; 5140: Based on the measurements performed, assess whether the mobility event triggering conditions have been met; 5150: Based on the assessment, execute the mobility event associated with the mobility event triggering conditions.

[0210] Network access node 1200 can be configured to perform a method including the following steps: 5210: Determine the measurement configuration, which shall be implemented by the mobile network node in relation to at least the serving beam supported by the network access node and the associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in the detection of the location of the mobile network node within the wireless communication network; 5220: Determine the mobility event triggering conditions that depend on the determined measurement configuration; 5230: Provides the mobile network node 1100 with an indication of measurement configuration and mobility event triggering conditions, which are associated with a serving beam and an associated detection auxiliary beam supported by the network access node.

[0211] Network control node 1300 can be configured to perform a method including the following steps: 5310: Determine that the conditions for achieving detection auxiliary beam mobility at the network access node are met; 5320: Determine the measurement configuration, which shall be implemented in relation to at least the serving beam supported by the network access node and the associated detection auxiliary beam, which is configured to provide a radio coverage area to assist in the detection of the location of the mobile network node within the wireless communication network; 5330: Determine the mobility event triggering conditions that depend on the determined measurement configuration; and 5340: Provides an indication of measurement configuration and mobility event triggering conditions to mobile network node 1100 or mobile access node 1200, the mobility event triggering conditions being associated with a serving beam and an associated detection auxiliary beam supported by the network access node.

[0212] Those skilled in the art will readily recognize that the steps of the various methods described above can be performed by a programmed computer. In this document, some embodiments are also intended to cover program storage devices, such as digital data storage media, which are machine- or computer-readable and encode machine-executable or computer-executable instructions that perform some or all of the steps of the methods described above. Program storage devices can be, for example, digital memories, magnetic storage media such as disks and tapes, hard disk drives, or optically readable digital data storage media. Embodiments are also intended to cover computers programmed to perform the steps of the methods described above. Contrary to limitations on data storage persistence (e.g., RAM versus ROM), the term "non-transient" as used herein refers to a limitation of the medium itself (i.e., tangible, not tactile).

[0213] As used in this application, the term "circuit" may refer to one or more or all of the following: (a) Hardware circuit implementation only (e.g., implemented with purely analog and / or digital circuits) and (b) A combination of hardware circuitry and software, such as (if applicable): (i) A combination of (multiple) analog and / or digital hardware circuits and software / firmware, and (ii) Any part of a hardware processor having software (including (multiple) digital signal processors, software, and (multiple) memories, which work together to enable a device (such as a mobile phone or server) to perform various functions) and (c) The operation requires software (e.g., firmware) for the operation of (multiple) hardware circuits and / or (multiple) processors, such as (multiple) microprocessors or parts thereof, but the software may be absent when the operation does not require the software.

[0214] This definition of "circuit" applies to all uses of the term in this application (including the claims). As a further example, as used in this application, the term "circuit" also covers only hardware circuitry or processors (or processors), or portions of hardware circuitry or servers and their accompanying software and / or firmware implementations. For example, where applicable to a particular claim element, the term "circuit" also covers baseband integrated circuits or processor integrated circuits for mobile devices or similar integrated circuits in servers, cellular network devices, or other computing or networking devices.

[0215] Although exemplary embodiments of the invention have been described with reference to various examples in the preceding paragraphs, it should be understood that modifications may be made to the given examples without departing from the scope of the claimed invention.

[0216] The features described above may be used in combinations other than those explicitly described.

[0217] Although some features have been described with reference to certain characteristics, these functions can be performed by other features, whether or not they are described.

[0218] Although features have been described with reference to certain embodiments, these features may also exist in other embodiments, whether or not they are described.

[0219] Although the foregoing description avoids focusing on those features of the invention that are considered particularly important, it should be understood that the applicant claims protection for any patentable features or combinations of features mentioned above and / or shown in the drawings, whether or not they have been specifically emphasized.

Claims

1. A mobile network node, comprising: At least one processor; as well as At least one memory, the at least one memory storing instructions, the instructions, when executed by the at least one processor, cause the network node to at least: Receive an indication of a detection auxiliary beam associated with the serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in the detection of the mobile network node's location within the wireless communication network; The network node receives an indication of a measurement configuration and an indication of a mobility event triggering condition, wherein the measurement configuration is to be implemented by the network node in relation to at least the serving beam and the associated detection auxiliary beam, and the mobility event triggering condition depends on the indicated measurement configuration. Perform the measurement according to the measurement configuration; Based on the measurements performed, assess whether the mobility event triggering conditions have been met; as well as Based on the assessment, a mobility event associated with the mobility event triggering condition is executed.

2. The mobile network node of claim 1, wherein the detection assist beam comprises a beam directed to a region in which the mobility event is expected to be initiated.

3. The mobile network node according to claim 1 or claim 2, wherein the detection auxiliary beam is not configured to support a communication link with the mobile network node.

4. The mobile network node according to any one of the preceding claims, wherein the mobility event includes: The transmission of measurement reports, or the transmission of beam switching indicators, or the transmission of instructions to switch communication from the serving beam to the target beam, or the transmission of instructions to reserve target beam resources for communication with the mobile network node, or cell handover, or conditional handover, or beam switching within a cell.

5. The mobile network node according to any one of the preceding claims, wherein the measurement configuration includes: The mobile network node is configured to measure an indication of the signal quality experienced at the mobile network node in relation to the serving beam and the detection auxiliary beam.

6. The mobile network node of claim 5, wherein the signal quality indication comprises: Reference signal received power, or reference signal received quality, or signal-to-interference-to-noise ratio, or angle of arrival, or a combination thereof.

7. The mobile network node according to any one of the preceding claims, wherein the mobility event triggering condition includes: A comparison of the measurement of the service beam with the equivalent measurement of the detection auxiliary beam; And optionally The mobility event triggering condition includes a threshold difference between the measurement of the serving beam and the equivalent measurement of the detection auxiliary beam.

8. The mobile network node according to any one of the preceding claims, wherein the measurement configuration further comprises: The mobile network node is configured to measure an indication of the signal quality experienced at the mobile network node in relation to at least one target beam.

9. The mobile network node according to claim 8, wherein the mobility event triggering condition includes: A threshold measurement indicating the signal quality experienced at the mobile network node in relation to the at least one target beam.

10. A method for a mobile network node, comprising: Receive an indication of a detection auxiliary beam associated with the serving beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in the detection of the mobile network node's location within the wireless communication network; The network node receives an indication of a measurement configuration and an indication of a mobility event triggering condition, wherein the measurement configuration is to be implemented by the network node in relation to at least the serving beam and the associated detection auxiliary beam, and the mobility event triggering condition depends on the indicated measurement configuration. Perform the measurement according to the measurement configuration; Based on the measurements performed, assess whether the mobility event triggering conditions have been met; as well as Based on the assessment, a mobility event associated with the mobility event triggering condition is executed.

11. A network control node, comprising: At least one processor; as well as At least one memory, the at least one memory storing instructions, the instructions, when executed by the at least one processor, cause the network node to at least: It was determined that the conditions for achieving detection of auxiliary beam mobility at the network access node were met; The measurement configuration is determined to be implemented in relation to at least the serving beam supported by the network access node and the associated detection auxiliary beam, which is configured to provide a radio coverage area to assist in the detection of mobile network nodes located within the wireless communication network. Determine the mobility event triggering conditions that depend on the determined measurement configuration; as well as The measurement configuration and the mobility event triggering conditions are provided to the mobile network node or mobile access node, the mobility event triggering conditions being associated with the service beam and associated detection auxiliary beam supported by the network access node.

12. The network control node of claim 11, wherein determining that the condition for achieving detection auxiliary beam mobility at the network access node is satisfied includes: Receive an instruction from the network access node that supports the service beam.

13. The network control node according to claim 11 or claim 12, wherein determining that the condition for achieving detection auxiliary beam mobility at the network access node is satisfied includes: Instructions are received from the mobile network node communicating with the network via the service beam supported by the network access node.

14. The network control node according to any one of claims 11 to 13, wherein the network control node is configured to: initiate the detection auxiliary beam associated with the service beam supported by the network access node by instructing the network access node to initiate the transmission of the detection auxiliary beam.

15. The network control node according to any one of claims 11 to 13, wherein the network control node is configured to initiate the detection auxiliary beam associated with the serving beam supported by the network access node by identifying a beam transmitted by the network access node as a candidate for use as a detection auxiliary beam associated with the serving beam, and accordingly determining the measurement configuration.

16. A method for controlling a network node, comprising: It was determined that the conditions for achieving detection of auxiliary beam mobility at the network access node were met; The measurement configuration is determined to be implemented in relation to at least the serving beam supported by the network access node and the associated detection auxiliary beam, which is configured to provide a radio coverage area to assist in the detection of mobile network nodes located within the wireless communication network. Determine the mobility event triggering conditions that depend on the determined measurement configuration; as well as The measurement configuration and the mobility event triggering conditions are provided to the mobile network node or mobile access node, the mobility event triggering conditions being associated with the service beam and associated detection auxiliary beam supported by the network access node.

17. A network access node, comprising: At least one processor; as well as At least one memory, the at least one memory storing instructions, the instructions, when executed by the at least one processor, cause the network node to at least: A measurement configuration is determined, which is to be implemented by the mobile network node in relation to at least the serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in the detection of the location of the mobile network node within the wireless communication network; Determine the mobility event triggering conditions that depend on the determined measurement configuration; as well as Instructions are provided to the mobile network node regarding the measurement configuration and the mobility event triggering conditions, which are associated with the serving beam and the associated detection auxiliary beam supported by the network access node.

18. A method for accessing a network node, comprising: A measurement configuration is determined, which is to be implemented by the mobile network node in relation to at least the serving beam supported by the network access node and an associated detection auxiliary beam, the detection auxiliary beam being configured to provide a radio coverage area to assist in the detection of the location of the mobile network node within the wireless communication network; Determine the mobility event triggering conditions that depend on the determined measurement configuration; as well as Instructions are provided to the mobile network node regarding the measurement configuration and the mobility event triggering conditions, which are associated with the serving beam and the associated detection auxiliary beam supported by the network access node.

19. A computer program product, when executed on a computer, operable to perform the method according to any one of claim 10, 16, or 18.

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