Event-based beam sweeping factor adaptation

Abstract

Systems, methods, apparatuses, and computer program products for event-based beam sweeping factor adaptation. A method can include determining configuration information for switching from a first beam sweeping factor to a second beam sweeping factor based on at least one event occurring at a user equipment. The method can also include determining whether the at least one event has occurred based on at least one measurement of a signal transmitted in a serving cell or a non-serving cell of the user equipment. The method can further include switching from the first beam sweeping factor to the second beam sweeping factor based on the determination of whether the at least one event has occurred. Additionally, the method can include performing measurements of signals transmitted in a cell of the user equipment based on the second beam sweeping factor.

Description

Technical Field

[0001] Some example embodiments may typically relate to mobile or wireless telecommunications systems, such as Long Term Evolution (LTE) or 5G New Radio (NR) access technologies, or 5G and above, or 6G access technologies, or other communication systems. For example, some example embodiments may relate to apparatus, systems, and / or methods for event-based beam scanning factor adaptation. Background Technology

[0002] Examples of mobile or wireless telecommunications systems may include Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN), Evolved UTRAN (E-UTRAN) for Long Term Evolution (LTE), LTE-A Advanced, MulteFire, LTE-APro, 5G or New Radio (NR) access technologies, and / or 6G radio access technologies. 5G and 6G radio systems refer to next-generation (NG) radio systems and network architectures. 5G and 6G network technologies are primarily based on NR technology, but 5G / 6G (or NG) networks can also be built on E-UTRAN radio. It is estimated that NR can provide bit rates of approximately 10-20 Gbit / s or higher and can at least support enhanced mobile broadband (eMBB) and ultra-reliable low-latency communication (URLLC) as well as massive machine-type communication (mMTC). NR is expected to provide extremely wideband and ultra-robust, low-latency connectivity and massive networking to support the Internet of Things (IoT). Summary of the Invention

[0003] Some example embodiments may relate to a method. This method may include determining configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at a user equipment. The method may also include determining whether at least one event has occurred based on at least one measurement of a signal transmitted in the serving cell or non-serving cell of the user equipment. The method may further include switching from the first beam scanning factor to the second beam scanning factor based on the determination that the at least one event has occurred. Additionally, the method may include performing measurements of signals transmitted in the cell of the user equipment based on the second beam scanning factor.

[0004] Other example embodiments may relate to an apparatus. The apparatus may include at least one processor and at least one memory storing instructions that, when executed by the processor, cause the apparatus to determine at least configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at the apparatus. The apparatus may also be able to determine whether the at least one event has occurred based on at least one measurement of a signal transmitted in the serving cell or a non-serving cell of the apparatus. The apparatus may also be able to switch from the first beam scanning factor to the second beam scanning factor based on the determination that the at least one event has occurred. Additionally, the apparatus may be able to perform measurements of signals transmitted in the cell of the apparatus based on the second beam scanning factor.

[0005] Other example embodiments may relate to an apparatus. The apparatus may include components for determining configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at the apparatus. The apparatus may also include components for determining whether the at least one event has occurred based on at least one measurement of a signal transmitted in the serving cell or a non-serving cell of the apparatus. The apparatus may further include components for switching from the first beam scanning factor to the second beam scanning factor based on the determination that the at least one event has occurred. Additionally, the apparatus may include components for performing measurements of signals transmitted in the cell of the apparatus based on the second beam scanning factor.

[0006] According to other example embodiments, a non-transitory computer-readable medium may be encoded with instructions that, when executed in hardware, can perform a method. The method may include determining configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at a user equipment. The method may also include determining whether at least one event has occurred based on at least one measurement of signals transmitted in the serving cell or non-serving cell of the user equipment. The method may further include switching from the first beam scanning factor to the second beam scanning factor based on the determination that the at least one event has occurred. Additionally, the method may include performing measurements of signals transmitted in the cell of the user equipment based on the second beam scanning factor.

[0007] Other example embodiments may relate to a computer program product performing a method. The method may include determining configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at a user equipment. The method may also include determining whether at least one event has occurred based on at least one measurement of a signal transmitted in a serving cell or a non-serving cell of the user equipment. The method may further include switching from a first beam scanning factor to a second beam scanning factor based on the determination that the at least one event has occurred. Additionally, the method may include performing measurements of signals transmitted in the cell of the user equipment based on the second beam scanning factor.

[0008] Other example embodiments may relate to an apparatus that may include circuitry configured to determine configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at the apparatus. The apparatus may also include circuitry configured to determine whether the at least one event has occurred based on at least one measurement of a signal transmitted in a serving cell or a non-serving cell of the apparatus. The apparatus may also include circuitry configured to switch from the first beam scanning factor to the second beam scanning factor based on the determination that the at least one event has occurred. Additionally, the apparatus may include circuitry configured to perform measurements of signals transmitted in a cell of the apparatus based on the second beam scanning factor.

[0009] Another example embodiment may involve a method. This method may include configuring a user equipment (UE) with a configuration for switching from a first beam scan factor to a second beam scan factor based on at least one event occurring at the UE. The method may also include receiving from the UE an indication that at least one event has occurred at the UE.

[0010] Other example embodiments may relate to an apparatus. The apparatus may include at least one processor and at least one memory including computer program code. The at least one memory and the computer program code may be configured, together with the at least one processor, to enable the apparatus to at least: configure a user equipment using a configuration for switching from a first beam scan factor to a second beam scan factor based on at least one event occurring at the user equipment. The apparatus may also be configured to receive from the user equipment an indication that at least one event has occurred at the user equipment.

[0011] Other example embodiments may relate to an apparatus. This apparatus may include components for configuring a user equipment (UE) using a configuration for switching from a first beam scan factor to a second beam scan factor based on at least one event occurring at the UE. The apparatus may also include components for receiving from the UE an indication that at least one event has occurred at the UE.

[0012] According to other example embodiments, a non-transitory computer-readable medium may be encoded with instructions that, when executed in hardware, can perform a method. The method may include configuring a user equipment using a configuration to switch from a first beam scan factor to a second beam scan factor based on at least one event occurring at the user equipment. The method may also include receiving from the user equipment an indication that at least one event has occurred at the user equipment.

[0013] Other example embodiments may relate to a computer program product performing a method. The method may include configuring a user equipment using a configuration for switching from a first beam scan factor to a second beam scan factor based on at least one event occurring at the user equipment. The method may also include receiving from the user equipment an indication that at least one event has occurred at the user equipment.

[0014] Other example embodiments may relate to an apparatus that may include circuitry configured to configure a configuration of a user equipment (UE) using a configuration for switching from a first beam scan factor to a second beam scan factor based on at least one event occurring at the UE. The apparatus may also include circuitry configured to receive from the UE an indication that at least one event has occurred at the UE. Attached Figure Description

[0015] To properly understand the exemplary embodiments, reference should be made to the accompanying drawings, in which: Figure 1 An example multi-panel user equipment (MPUE) is shown, which measures the synchronization signal block (SSB).

[0016] Figure 2 A shows an example of UE beam refinement.

[0017] Figure 2 B shows another example of UE beam refinement.

[0018] Figure 2 C shows another example of UE beam refinement.

[0019] Figure 2 D shows yet another example of UE beam refinement.

[0020] Figure 3 An example of multiple RxUE is shown.

[0021] Figure 4A An example of an event-triggered beam scan reduction condition is shown according to certain example embodiments.

[0022] Figure 4BAn example of another event-triggered beam scan reduction condition is shown according to certain example embodiments.

[0023] Figure 4C An example of another event-triggered beam scan reduction condition is shown according to certain example embodiments.

[0024] Figure 5 An example of event-triggered beam scan reduction based on reference signal received power (RSRP) measurement according to certain example embodiments is shown.

[0025] Figure 6 An example of beam scan reduction triggered by an event based on RSRP measurement changes, according to certain example embodiments, is shown.

[0026] Figure 7 An example flowchart of a method according to certain example embodiments is shown.

[0027] Figure 8 An example flowchart of another method according to some example embodiments is shown.

[0028] Figure 9 A set of apparatuses according to certain example embodiments is shown. Detailed Implementation

[0029] It will be readily understood that, as generally described and illustrated in the accompanying drawings, components of certain example embodiments can be arranged and designed in a variety of different configurations. The following is a detailed description of some example embodiments of systems, methods, apparatuses, and computer program products for event-based beam scanning factor adaptation.

[0030] The features, structures, or characteristics of the exemplary embodiments described throughout this specification can be combined in any suitable manner in one or more exemplary embodiments. For example, throughout this specification, the use of the phrases "certain embodiments," "exemplary embodiments," "some embodiments," or other similar language refers to the fact that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment. Therefore, the phrases "in some embodiments," "exemplary embodiments," "in some embodiments," "in other embodiments," or other similar language appearing throughout this specification do not necessarily refer to the same set of embodiments, and the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Furthermore, the terms "base station," "cell," "node," "gNB," "network," or other similar language throughout this specification are used interchangeably.

[0031] As used herein, “at least one of the following: ” and “at least one of ” and similar wording, where the list of two or more elements is connected by “and” or “or”, indicates at least one of the elements, at least any two or more, or all of the elements.

[0032] Figure 1 An example multi-panel user equipment (MPUE) is shown, illustrating the measurement synchronization signal block (SSB). For example... Figure 1 As shown, the MPUE can have four panels and can measure SSB sequentially by UE panel, averaging three samples before reporting to the network with an SSB period of 20ms. For millimeter-wave (mmWave) operation (e.g., frequency range 2 (FR2) 24–52.6 GHz), the UE implementation can have multiple antenna panels to perform beam steering over a larger solid angle range. Therefore, the MPUE may require a longer time (e.g., 240ms) to perform measurements and averaging for reporting.

[0033] Figure 2 A-2D illustrates UE beamfining examples with half-power beamwidth (HPBW) of 90 degrees, 45 degrees, 22 degrees, and 45 degrees with a phase shifter relative difference of 110 degrees. Specifically, Figure 2 A-2D illustrates the UE beam refinement as the number of active components increases. Therefore, using an analog phase shifter ( Figure 2 D) It can improve the equivalent isotropic radiated power (EIRP) and the UE beam steering capability. For example... Figure 2 As shown in A-2D, the FR2UE can refine and steer its beam to obtain a narrow and highly directional beam toward the gNodeB, thereby improving link budget and uplink (UL) coverage.

[0034] The 3GPP specification defines the Layer 1 (L1) Radio Link Monitoring Reference Signal (RLM-RS) measurement delay requirements in FR2-1, which have a scaling factor N (e.g., beam scan factor) to extend the measurement time beyond FR1 to accommodate continuous UE FR2 panel selection and UE FR2 beam refinement. Therefore, for an FR2-1 UE, the complete measurement duration and evaluation time of the L1 procedure are scaled by factor N. The beam scan factor N can be related to the number of beams / panels measured on the UE side. Tables 1 and 2 show examples of SSB evaluation cycles for RLM measurements in FR1 and FR2, respectively, illustrating the additional delay in FR2 due to the beam scan factor N.

[0035] Table 1: Evaluation period T for FR1 Evaluate_out_SSB and T Evaluate_in_SSB

[0036] Table 2: Evaluation period T for FR2 Evaluate_out_SSB and T Evaluate_in_SSB

[0037] 3GPP also defines a fixed N-factor, with a baseline value of 8 in FR2-1 and 12 in FR2-2. For example, the resulting L1 reference signal received power (L1-RSRP) measurement period is calculated in Table 3.

[0038] Table 3: Numerical examples of L1 measurement cycles for FR2-1UE with N=1 and N=8

[0039] In multi-Rx operations within 3GPP RAN4, if the UE is capable of multi-Rx operation, multi-Rx UEs can define new optional UE capabilities for beam scan factor reduction in SSB-based L1-RSRP measurements. For example, candidate values ​​for beam scan factor reduction could include {2, 4, 6} for FR2-1. In fast beam scanning with multi-Rx chain downlink (DL) reception, fast beam scanning can be based on UE capabilities, where candidate values ​​for beam scan factor reduction can include {2, 4, 6} for FR2-1. Besides RLM and beam failure detection / candidate beam detection (BFD / CBD), fast beam scanning for multi-Rx can be applied to both SSB-based L1 measurements and Channel State Information Reference Signal (CSI-RS)-based L1 measurements. The reduced beam scan factor can be used to define the evaluation period for SSB-based and CSI-RS-based L1 measurements in FR2-1.

[0040] Figure 3 An example of a multiple RxUE is shown. A multiple RxUE can have two layers per radio frequency (RF) panel. Specifically, Figure 3 A multi-RxUE is illustrated, which uses one Rx chain to communicate with or perform measurements to the serving transport receiver point 1 (TRP1), and another Rx chain to perform measurements to the adjacent TRP2. For example... Figure 3 As shown, adjacent TRP2 can represent non-serving cells of multiple Rx UEs and can also represent cells used for handover of multiple Rx UEs. Whenever a radio resource management (RRM) measurement needs to be performed, a multi-Rx chain UE can switch at least one of its receivers from DL data reception mode to RRM measurement mode when performing the measurement.

[0041] In 5G NR, the SSB-based RRM Measurement Timing Configuration (SMTC) window is defined to inform the UE and other devices of the measurement periodicity and timing of the SSBs available for the UE to perform measurements. The SMTC can be configured with Radio Resource Control (RRC) configurations from the network to one or more UEs and may not be dynamically updated. The UE may assume that all relevant neighboring cells' SSBs can be found within the SMTC window, which may require a certain level of synchronization between SSBs transmitted by neighboring cells.

[0042] According to 3GPP, various event-triggered measurement reports for mobility are defined. For example, events for handover in 5G NR may include, but are not limited to: event A1, where service becomes better than a threshold; event A2, where service becomes worse than a threshold; event A3, where neighboring cells become offset better than the serving primary cell (SpCell); event A4, where neighbors become better than a threshold; event A5, where SpCell becomes worse than a first threshold (threshold1) and neighbors become better than a second threshold (threshold2); event A6, where neighbors become offset better than the secondary cell (SCell); event B1, where inter-RAT neighbors become better than a threshold; and event B2, where the primary cell (PCell) becomes worse than threshold1 and inter-RAT neighbors become better than threshold2.

[0043] While the primary focus of 3GPP's Multi-Rx (MRx) framework is on defining the requirements that allow a UE to receive data on a single component carrier with up to 4 layers of multiple-input multiple-output (MIMO) using two different quasi-co-located (QCL) type RSs (e.g., beams), there is a need to reduce L3 process delay requirements, such as handover requirements in UEs with MRx capabilities.

[0044] Figures 4A-4C Examples of event-triggered beam reduction conditions according to certain example embodiments are shown. As described herein, Figures 4A-4C Examples of event-triggered beam scan reduction based on RSRP measurements, ranging from a "traditional operation" value N=8 to a reduced value N=4, are shown under different cancellation conditions. For example, Figure 4A The diagram illustrates the trigger condition that reduces N from N=8 to N=4 when the measured value (e.g., RSRP) is less than the first threshold (TH1) - hysteresis value (Hyst), and the cancellation condition that increases N back to N=8 when the measured value is greater than TH1 + Hyst. Figure 4Bshows a trigger condition (RSRP<TH1-Hyst) for reducing N from N=8 to N=4 at the start of time window W, and a cancel condition for increasing N back to N=8 at the end of time window W. Figure 4C shows a trigger condition for reducing N from N=8 to N=4 when RSRP<TH1-Hyst, and a cancel condition that depends on the handover of the UE that triggers N to switch back from N=4 to N=8.

[0045] According to some example embodiments, the network may configure event-based beam scanning factor reduction for multi-Rx UEs for measurements of neighboring cells. For example, one scenario in which this configuration may occur is when the UE is approaching (or about to start) a handover procedure. In certain example embodiments, the UE may be configured to implement event-based beam scanning factor reduction by being configured with at least one event that triggers N to decrease from a current value that may be regarded as a baseline (e.g., the "legacy operation" N=8 value in FR2-1) to a target value lower than the current value.

[0046] In some example embodiments, the target value may be an absolute value. For example, the target value may be the minimum (e.g., lowest) value among the values supported by the UE. In some example embodiments, if the UE supports N=2, 4, 6 and 8, the target value may be 2. In other example embodiments, the target value may be a value specified by the network. In further example embodiments, the target value may be a relative value. For example, the network may set the target value to be obtained by reducing the current value by half, such that N=8 is reduced to N=4.

[0047] As described herein, this event may be referred to as event N2, where "N" corresponds to the beam scanning factor N, and may be similar to event A2 of 3GPP TS 38.331. Event N2 may be included in the serving cell of the UE, and in some cases may be worse than a first predefined threshold. In certain example embodiments, the beam scanning factor N may be increased back to the legacy operation value (e.g., N=8). For example, as Figure 4A shown, event N2 may include an entry / trigger condition and a leave / cancel condition. As Figure 4A shown, the entry / trigger condition may be the time point at which the beam scanning factor N switches from N=8 to N=4, for example when the measurement < first threshold – hysteresis. On the other hand, the leave / cancel condition may be the time point at which the beam scanning factor N increases from N=4 to N=8, for example when the measurement > first threshold + hysteresis. According to some example embodiments, the "measurement" may be a reference signal received power (RSRP) measurement, the "first threshold" may be a first threshold configured by the network, and the "hysteresis" may be configured by the network to avoid any ping-pong effect during events and measurements.

[0048] In some example embodiments, event N2 may only have an entry condition. In other example embodiments, other events (e.g., N1) may be configured to increase the echo beam scan factor N. Figure 4C As shown, while maintaining the target beam scan factor until the switching is complete, another event may occur, after which the beam scan factor can be switched from N=4 to N=8. For example... Figure 4B As shown, the time window W and the target beam scanning factor can be maintained only for a specific time window W.

[0049] In a further example embodiment, there may be a relationship between event A2 and the new event N2, where the triggering of A2 leads to the triggering of N2. Therefore, N2 can be indirectly triggered whenever A2 is triggered. According to some example embodiments, combinations of the various events described above are possible, such that the beam scan factor N increases back when at least one of the aforementioned events / options is satisfied. In some example embodiments, such events (e.g., event N2 and its associated parameters, a first threshold, hysteresis, W, and the target value N) can be configured via RRC. According to another example embodiment, the target value can be configured by the network, agreed upon in the specification, or reported by the UE from a pre-configured set from the network.

[0050] In some example embodiments, UE configuration from the network may include reporting measurements performed using a reduced beam scan factor N. This reporting may be "event-based reporting" or "event-based periodic reporting," where events trigger periodic reporting. In some example embodiments, reportable metrics may include RSRP, RS Receive Quality (RSRQ), Received Signal Strength Indicator (RSSI), or Signal-to-Interference-plus-Noise Ratio (SINR).

[0051] According to some example embodiments, once an event is triggered, the UE can signal to the network that such an event has been triggered, letting the network know that the UE has begun using a reduced beam scan factor N. According to some example embodiments, signaling to the network can be performed via RRC, Media Access Control-Control Unit (MAC-CE), or Uplink Control Information (UCI). According to other example embodiments, the UE configuration from the network can include a list of specific measurements for which beam scan factor reduction is applied. For example, specific measurements may include per-SSB measurements toward neighboring cells, per-cell measurements based on SSBs toward neighboring cells, per-CSI-RS measurements toward neighboring cells, per-cell measurements based on CSI-RS toward neighboring cells, and / or per-cell measurements based on both SSBs and CSI-RS toward neighboring cells.

[0052] In some example embodiments, where multiple RxUEs can support more than two values ​​of N, the UE configuration from the network may include multiple thresholds that allow switching between adjacent N values. For example, Figure 5 An example of event-triggered beam scan reduction based on RSRP measurements with multiple thresholds, triggering conditions, and cancellation conditions is shown according to certain example embodiments. The various conditions allow the beam scan factor to be reduced to different values ​​depending on the conditions. For example, in Figure 5 In the example shown, there can be three thresholds, where N can be selected from {2, 4, 6, 8}. Figure 5 As shown, various options are available to implement scenarios with multiple thresholds that allow switching between adjacent N values. For example, a single event N2 with multiple thresholds can be configured for entry and exit conditions. Additionally or alternatively, multiple events of types N2 and N1 can exist, each configured with a single threshold.

[0053] According to some example embodiments, there may be some interdependencies between the thresholds configured for events. For example, A2 can be used to trigger a handover when the UE moves toward the cell edge. As an example of this scenario, after event A2, the network can configure the UE for certain measurements toward neighboring cells. According to some example embodiments, the threshold in event N2 can be the same as the threshold in event A2. According to other example embodiments, the threshold in event N2 can be higher than the threshold in event A2, allowing the UE to begin performing faster measurements before a potential blind handover is triggered.

[0054] Figure 6 An example of event-triggered beam scan reduction based on RSRP measurement changes is shown according to certain example embodiments. RSRP measurement changes can make the threshold dependent on the rate of RSRP measurement change. For example, if the RSRP is measured / estimated / assessed as rapidly degrading, the UE can use a high threshold TH. 1,f On the other hand, if RSRP is measured / estimated / assessed as slowly degrading, the UE can use a lower threshold TH. 1,s <TH 1,f In other example embodiments, once the event is triggered and N is reduced, the scheduling restrictions during SMTC can be turned off or relaxed.

[0055] In some example embodiments, the determination of whether the degradation is fast or slow may be characterized by considering the difference between a plurality of RSRP measurements. For example, RSRP1 may be measured at time t1, and RSRP2 < RSRP1 may be measured at time t2 > t1. If RSRP1-RSRP2 is above a predefined threshold, the RSRP may be classified as fast degradation. However, if RSRP1-RSRP2 is below the predefined threshold, the RSRP may be classified as slow degradation. As an illustrative example, the RSRP may have a threshold of -90dBm. With the fast / slow degradation feature, the RSRP difference / variation within a specific time may be a 10dB drop within 100ms. In some example embodiments, the determination of whether RSRP degrades fast or slow is not limited to the above examples, and there may be other options, including for example performing M RSRP measurements (e.g., RSRP1, RSRP2, ..., RSRPM) over multiple time periods (e.g., t1, t2, ..., tM), and applying an interpolation method that can perceive the speed degree of RSRP variation.

[0056] Figure 7 shows an example flowchart of a method according to certain example embodiments. In an example embodiment, Figure 7 the method may be performed by a network entity or a group of multiple network elements in a 3GPP system (such as LTE or 5G-NR). For example, in an example embodiment, Figure 7 the method may be performed by a UE similar to one of the apparatuses 10 or 20 shown in Figure 9 .

[0057] According to certain example embodiments, Figure 7 the method may include determining, at 700, configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at a user equipment. The method may further include: determining, at 705, whether the at least one event has occurred based on at least one measurement of signals transmitted in a serving cell or a non-serving cell of the user equipment. The method may further include switching, at 710, from the first beam scanning factor to the second beam scanning factor based on the determination of whether the at least one event has occurred. In addition, the method may include, at 715, performing measurements on signals transmitted in the cell of the user equipment based on the second beam scanning factor.

[0058] According to some example embodiments, at least one event may be associated with a first measurement of at least one measurement performed on a signal transmitted in the serving cell of a user equipment. According to some example embodiments, a second beam scanning factor may be associated with a second measurement of at least one measurement performed on a signal transmitted in a non-serving cell of a user equipment. According to other example embodiments, the second beam scanning factor may include a value less than the first beam scanning factor.

[0059] In some example embodiments, at least one event may include a first event and a second event, and the first event may be indirectly triggered when the second event is triggered. In some example embodiments, at least one event may include at least one condition. In other example embodiments, at least one condition includes at least one of an entry condition or a exit condition. In still other example embodiments, the entry condition and the exit condition may depend on at least one measurement, a pre-configured threshold, and a hysteresis value of at least one measurement.

[0060] According to some example embodiments, at least one event may include the completion of a handover of a user equipment. According to other example embodiments, at least one event may include a time window. According to some example embodiments, at least one measurement includes at least one of a reference signal received power, a reference signal received quality, a received signal strength indicator, or a signal-to-interference-plus-noise ratio. According to yet another example embodiment, the method may further include sending an indication to a network element for a handover from a first beam scan factor to a second beam scan factor. According to some example embodiments, the handover from the first beam scan factor to the second beam scan factor may depend on the rate of change of at least one measurement.

[0061] Figure 8 An example flowchart of another method according to certain example embodiments is shown. In the example embodiments, Figure 8 The method can be performed by a network entity or a group of multiple network elements in a 3GPP system (such as LTE or 5G-NR). For example, in an example embodiment, Figure 8 The method can be similar to Figure 9 The gNB of either device 10 or 20 shown is executed.

[0062] According to certain example embodiments, Figure 8 The method may include, at 800, configuring the user equipment using a configuration to switch from a first beam scan factor to a second beam scan factor based on at least one event occurring at the user equipment. The method may also include, at 805, receiving from the user equipment an indication that at least one event has occurred at the user equipment.

[0063] According to some example embodiments, at least one event may be associated with a first measurement of at least one measurement performed on a signal transmitted in the serving cell of the user equipment. According to some example embodiments, a second beam scanning factor may be associated with a second measurement of at least one measurement performed on a signal transmitted in a non-serving cell of the user equipment. According to other example embodiments, the configuration may include multiple measurements, and a reduction in the first beam scanning factor may be applied to multiple measurements. According to yet another example embodiment, the multiple measurements include at least one of the following: a measurement of each synchronization signal block of a non-serving cell of the user equipment, a per-cell measurement based on the synchronization signal blocks of the non-serving cell, a measurement of each channel state information reference signal of the non-serving cell, a per-cell measurement based on the channel state information reference signal of the non-serving cell, or a per-cell measurement based on both the synchronization signal blocks and the channel state information reference signal of the non-serving cell.

[0064] In some example embodiments, the second beam scanning factor may include a value less than the first beam scanning factor. In some example embodiments, at least one event may include a first event and a second event. In other example embodiments, the first event may be indirectly triggered when the second event is triggered. In some example embodiments, at least one event may include at least one condition. In other example embodiments, at least one condition includes at least one of an entry condition and a departure condition.

[0065] According to some example embodiments, the entry and exit conditions may depend on at least one measurement, a pre-configured threshold, and a hysteresis value of at least one measurement. In some example embodiments, at least one event may include the completion of a user equipment handover. In other example embodiments, at least one event may include a time window. According to some example embodiments, at least one measurement includes at least one of a reference signal received power, a reference signal received quality, a received signal strength indicator, or a signal-to-interference-plus-noise ratio. According to other example embodiments, the method may further include receiving from the user equipment an indication of a handover from a first beam scan factor to a second beam scan factor.

[0066] Figure 9 A set of devices 10 and 20 according to certain example embodiments are shown. In some example embodiments, devices 10 and 20 may be elements in or associated with a communication network. For example, device 10 may be a UE or other similar radio communication computer equipment, and device 20 may be a network (i.e., gNB).

[0067] In some example embodiments, devices 10 and 20 may include one or more processors, one or more computer-readable storage media (e.g., memory, storage device, etc.), one or more radio access components (e.g., modem, transceiver, etc.), and / or a user interface. In some example embodiments, devices 10 and 20 may be configured to operate using one or more radio access technologies, such as GSM, LTE, LTE-A, NR, 5G, WLAN, WiFi, NB-IoT, Bluetooth, NFC, MulteFire, and / or any other radio access technology. It should be noted that those skilled in the art will understand that devices 10 and 20 may include... Figure 9 Components or features not shown in the diagram.

[0068] like Figure 9 As illustrated in the examples, devices 10 and 20 may include or be coupled to processors 12 and 22 for processing information and executing instructions or operations. Processors 12 and 22 may be any type of general-purpose or special-purpose processor. In practice, as examples, processors 12 and 22 may include one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a DSP, a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), and a processor based on a multi-core processor architecture. While a single processor 12 and 22 are shown in Figure 14, multiple processors may be utilized according to other example embodiments. For example, it should be understood that in some example embodiments, devices 10 and 20 may include two or more processors that can form a multiprocessor system capable of supporting multiple processing (e.g., in this case, processor 12 may represent multiple processors). According to some example embodiments, the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster).

[0069] Processors 12 and 22 can perform functions associated with the operation of devices 10 and 20, such as precoding of antenna gain / phase parameters, encoding and decoding of individual bits constituting a communication message, information formatting, and overall control of devices 10 and 20, including... Figure 1-8 The process and examples are shown below.

[0070] Devices 10 and 20 may also include or be coupled to memories 14 and 24 (internal or external), which may be coupled to processors 12 and 24, respectively, for storing information and instructions that can be executed by processors 12 and 24. Memories 14 and 24 may be one or more memories of any type suitable for the local application environment and may be implemented using any suitable volatile or non-volatile data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and / or removable memory. For example, memories 14 and 24 may include random access memory (RAM), read-only memory (ROM), static storage devices such as disks or optical discs, hard disk drives (HDDs), or any other type of non-transitory machine or computer-readable medium, and any combination thereof. Instructions stored in memories 14 and 24 may include program instructions or computer program code that, when executed by processors 12 and 22, enable devices 10 and 20 to perform the tasks described herein.

[0071] In some example embodiments, devices 10 and 20 may also include or be coupled to an (internal or external) drive or port configured to accept and read external computer-readable storage media, such as an optical disc, USB drive, flash drive, or any other storage media. For example, the external computer-readable storage media may store computer programs or software executed by processors 12 and 22 and / or devices 10 and 20 to perform... Figure 1-8 Any methods and examples shown.

[0072] In some example embodiments, devices 10 and 20 may further include or be coupled to one or more antennas 15 and 25 for receiving downlink signals and for transmission from devices 10 and 20 via UL. Devices 10 and 20 may also include transceivers 18 and 28 configured to transmit and receive information. Transceivers 18 and 28 may also include radio interfaces (e.g., modems) coupled to antennas 15 and 25. The radio interface may correspond to a variety of radio access technologies, including one or more of GSM, LTE, LTE-A, 5G, NR, WLAN, NB-IoT, Bluetooth, BT-LE, NFC, RFID, UWB, etc. The radio interface may include other components such as filters, converters (e.g., digital-to-analog converters, etc.), symbol demappers, signal shaping components, inverse fast Fourier transform (IFFT) modules, etc., to process symbols carried by the downlink or UL, such as OFDMA symbols.

[0073] For example, transceivers 18 and 28 may be configured to modulate information onto a carrier waveform for transmission by antennas 15 and 25, and demodulate information received via antennas 15 and 25 for further processing by other elements of devices 10 and 20. In other example embodiments, transceivers 18 and 28 may be able to directly transmit and receive signals or data. Additionally or alternatively, in some example embodiments, device 10 may include input and / or output devices (I / O devices). In some example embodiments, devices 10 and 20 may also include a user interface, such as a graphical user interface or a touchscreen.

[0074] In some example embodiments, memories 14 and 24 store software modules that provide functionality when executed by processors 12 and 22. These modules may include, for example, an operating system that provides operating system functionality for devices 10 and 20. The memories may also store one or more functional modules, such as applications or programs, to provide additional functionality to devices 10 and 20. Components of devices 10 and 20 may be implemented in hardware or as any suitable combination of hardware and software. According to some example embodiments, devices 10 and 20 may optionally be configured to communicate with each other via a wireless or wired communication link 70 (in any combination) according to any radio access technology such as NR.

[0075] According to some example embodiments, processors 12 and 22, and memories 14 and 24, may be included in or form part of processing or control circuitry. Additionally, in some example embodiments, transceivers 18 and 28 may be included in or form part of transceiver circuitry.

[0076] For example, in some exemplary embodiments, device 10 may be controlled by memory 14 and processor 12 to determine configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at the device. Device 10 may also be controlled by memory 14 and processor 12 to determine whether at least one event has occurred based on at least one measurement of a signal transmitted in the serving cell or non-serving cell of the device. Device 10 may also be controlled by memory 14 and processor 12 to switch from a first beam scanning factor to a second beam scanning factor based on the determination that at least one event has occurred. Device 10 may also be controlled by memory 14 and processor 12 to perform measurements of signals transmitted in the cell of the device based on the second beam scanning factor.

[0077] In other example embodiments, device 20 may be controlled by memory 24 and processor 22 to configure the user equipment using a configuration for switching from a first beam scan factor to a second beam scan factor based on at least one event occurring at the user equipment. Device 20 may also be controlled by memory 24 and processor 22 to receive an indication from the user equipment that at least one event has occurred at the user equipment.

[0078] In some example embodiments, the apparatus (e.g., apparatus 10 and / or apparatus 20) may include components for performing the methods, processes, or any variations discussed herein. Examples of components may include one or more processors, memory, controllers, transmitters, receivers, and / or computer program code for enabling operations to be performed.

[0079] Some example embodiments may relate to an apparatus including components for performing any of the methods described herein, including, for example, components for determining configuration information for switching from a first beam scan factor to a second beam scan factor based on at least one event occurring at the apparatus. The apparatus may also include components for determining whether the at least one event has occurred based on at least one measurement of a signal transmitted in the serving cell or non-serving cell of the apparatus. The apparatus may also include components for switching from the first beam scan factor to the second beam scan factor based on the determination that the at least one event has occurred. The apparatus may further include components for performing measurements of signals transmitted in the cell of the user equipment based on the second beam scan factor.

[0080] Other example embodiments may relate to an apparatus including components for performing any of the methods described herein, including, for example, components for configuring a user equipment using a configuration for switching from a first beam scan factor to a second beam scan factor based on at least one event occurring at the user equipment. The apparatus may also include components for receiving from the user equipment an indication that at least one event has occurred at the user equipment.

[0081] Certain example embodiments described herein provide several technical improvements, enhancements, and / or advantages. For example, in some example embodiments, faster measurements can be performed with a reduced N. Additionally, although using a reduced beam scan factor can increase UE power consumption and thus reduce battery life, some example embodiments can provide battery consumption optimization by disabling the reduced N for most of the time. According to some example embodiments, when the UE is close to performing a handover, the UE can reduce the beam scan factor to perform faster measurements, thereby measuring neighboring target cells more quickly.

[0082] A computer program product may include one or more computer-executable components that are configured to perform some example embodiments when the program runs. The one or more computer-executable components may be at least one piece of software code or a portion thereof. Modifications and configurations required to implement the functionality of some example embodiments may be executed as routines(s), which(s) may be implemented as added or updated software(s). The software(s) may be downloaded to a device.

[0083] As an example, software or computer program code, or portions thereof, may be in the form of source code, object code, or some intermediate form, and may be stored in some carrier, distribution medium, or computer-readable medium, which may be any entity or device capable of carrying the program. Such a carrier may include, for example, recording media, computer memory, read-only memory, photoelectric and / or electrical carrier signals, telecommunication signals, and software distribution packages. Depending on the required processing power, the computer program may execute in a single electronic digital computer or may be distributed across multiple computers. The computer-readable medium or computer-readable storage medium may be a non-transitory medium.

[0084] In other example embodiments, the function may be performed by hardware or circuitry included in the device (e.g., device 10 or device 20), for example by using an application-specific integrated circuit (ASIC), a programmable gate array (PGA), a field-programmable gate array (FPGA), or any other combination of hardware and software. In yet another example embodiment, the function may be implemented as a signal, i.e., an intangible means that can be carried by an electromagnetic signal downloaded from the Internet or other networks.

[0085] According to certain example embodiments, an apparatus such as a node, device, or corresponding component may be configured as a circuit, computer, or microprocessor (such as a single-chip computer element) or chipset, including at least one memory for providing storage capacity for arithmetic operations and an arithmetic processor for performing arithmetic operations.

[0086] It will be readily understood by those skilled in the art that the present disclosure as described above can be practiced with processes of a different sequence and / or with hardware elements in a configuration different from the disclosed configuration. Therefore, although the present disclosure has been described based on these exemplary embodiments, it will be apparent to those skilled in the art that certain modifications, variations, and alternative constructions will be readily apparent while remaining within the spirit and scope of the exemplary embodiments. While the above embodiments relate to 5G NR and LTE technologies, the above embodiments can also be applied to any other current or future 3GPP technologies, such as Advanced Long Term Evolution and / or fourth-generation (4G) technologies.

[0087] Partial vocabulary list: 3GPP Third Generation Partnership Project 5G fifth generation 5GCN 5G Core Network 5GS 5G System BFD Beam Failure Detection BM Beam Management BS base station CBD candidate beam detection CSI Channel Status Information DCI downlink control indication DL downlink DRX discontinuous reception eNB Enhanced Node B E-UTRAN Evolution UTRAN FR frequency range gNB5G or next-generation NodeB HO switching L1 Floor 1 L3 floor 3 LTE Long Term Evolution MACCE Media Access Control Unit MIMO (Multiple Input Multiple Output) MPUE Multi-panel UE M-TRP Multiple Transmission Receiver Point NR New Radio PDCCH Physical Downlink Control Channel PDSCH Physical Downlink Shared Channel PUCCH (Physical Uplink Control Channel) PUSCH Physical Uplink Shared Channel QCL Quasi-co-addressable RLM radio link monitoring RRC Radio Resource Control RRM Radio Resource Management RS reference signal RSRPRS Receive Power RSRQRS reception quality RSSIRS intensity indicator SINR signal versus interference plus noise ratio SIB System Information Block SMTC-based RRM measurement timing configuration using SSB SRS detection reference signal SSB Synchronization Signal / PBCH Block TCI transmission configuration indication TRP Transmitter / Receiver Point UCI uplink control information UE User Equipment UL uplink

Claims

1. A method comprising: Determine configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at the user equipment; Based on at least one measurement of the signal transmitted in the serving cell or non-serving cell of the user equipment, it is determined whether the at least one event has occurred; Based on the determination that at least one event has occurred, switch from the first beam scanning factor to the second beam scanning factor; as well as Based on the second beam scanning factor, measurements of the signals transmitted in the cell of the user equipment are performed.

2. The method of claim 1, wherein the at least one event is associated with a first measurement of the at least one measurement performed on the signal, the signal being transmitted in the serving cell of the user equipment.

3. The method of claim 1 or 2, wherein the second beam scanning factor is associated with a second measurement in one of the at least one measurements performed on the signal, the signal being transmitted in the non-serving cell of the user equipment.

4. The method according to any one of claims 1 to 3, wherein the second beam scanning factor comprises a value less than the first beam scanning factor.

5. The method according to any one of claims 1 to 4, The at least one event includes a first event and a second event, and When the second event is triggered, the first event is indirectly triggered.

6. The method according to any one of claims 1 to 5, The at least one event includes at least one condition. The at least one condition includes at least one of the following: Entry conditions, or Conditions for leaving, and The entry and exit conditions depend on the at least one measurement, a pre-configured threshold, and the hysteresis value of the at least one measurement.

7. The method according to any one of claims 1 to 6, wherein the at least one event includes the completion of the handover of the user equipment.

8. The method according to any one of claims 1 to 6, wherein the at least one event includes a time window.

9. The method according to any one of claims 1 to 8, wherein the at least one measurement comprises at least one of the following: Reference signal received power, Reference signal reception quality, Received signal strength indicator, or Signal-to-interference-plus-noise ratio.

10. The method according to any one of claims 1 to 9, further comprising: Send an instruction to the network element for the switching from the first beam scanning factor to the second beam scanning factor.

11. The method according to any one of claims 1 to 10, wherein switching from the first beam scanning factor to the second beam scanning factor depends on the rate of change of the at least one measurement.

12. A method comprising: A configuration is used to configure a user equipment for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at the user equipment. as well as Receive from the user equipment an indication that the at least one event has occurred at the user equipment.

13. The method of claim 12, wherein the at least one event is associated with a first measurement of the at least one measurement performed on the signal, the signal being transmitted in the serving cell of the user equipment.

14. The method of claim 12 or 13, wherein the second beam scanning factor is associated with a second measurement of the at least one measurement performed on the signal, the signal being transmitted in the non-serving cell of the user equipment.

15. The method according to any one of claims 12 to 14, wherein the configuration includes a plurality of measurements, and the reduction of the first beam scan factor can be applied to the plurality of measurements.

16. The method of claim 15, wherein the plurality of measurements comprises at least one of the following: Measurement of each synchronization signal block in the non-serving cell of the user equipment. Based on per-cell measurements of the synchronization signal blocks of the non-serving cells, Measurement of the per-channel state information reference signal for the non-serving cell. Based on per-cell measurements of the channel state information reference signal for the non-serving cell, or Based on per-cell measurements of both the synchronization signal block and the channel state information reference signal for the non-serving cell.

17. The method according to any one of claims 12 to 16, wherein the second beam scanning factor comprises a value less than the first beam scanning factor.

18. The method according to any one of claims 12 to 17, The at least one event includes a first event and a second event, and When the second event is triggered, the first event is indirectly triggered.

19. The method according to any one of claims 12 to 18, The at least one event includes at least one condition. The at least one condition includes at least one of the following: Entry conditions, or Conditions for leaving, and The entry and exit conditions depend on at least one measurement, a pre-configured threshold, and a hysteresis value of the at least one measurement.

20. The method according to any one of claims 12 to 19, wherein the at least one event includes the completion of the handover of the user equipment.

21. The method according to any one of claims 12 to 19, wherein the at least one event comprises a time window.

22. The method of claim 19, wherein the at least one measurement comprises at least one of the following: Reference signal received power, Reference signal reception quality, Received signal strength indicator, or Signal-to-interference-plus-noise ratio.

23. The method according to any one of claims 12 to 22, further comprising: The user equipment receives an indication of the switching from the first beam scanning factor to the second beam scanning factor.

24. An apparatus comprising: At least one processor; as well as At least one memory, the at least one memory storing instructions that, when executed by the at least one processor, cause the device to at least: Determine configuration information for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at the device; Based on at least one measurement of the signal transmitted in the serving cell or non-serving cell of the device, it is determined whether the at least one event has occurred; Based on the determination that at least one event has occurred, switch from the first beam scanning factor to the second beam scanning factor; as well as Based on the second beam scanning factor, a measurement of the signal transmitted in the cell of the device is performed.

25. The apparatus of claim 24, wherein the at least one event is associated with a first measurement of the at least one measurement performed on the signal, the signal being transmitted in the serving cell of the apparatus.

26. The method of claim 24 or 25, wherein the second beam scanning factor is associated with a second measurement in one of the at least one measurements performed on the signal, the signal being transmitted in the non-serving cell of the device.

27. The apparatus according to any one of claims 24 to 26, wherein the second beam scanning factor comprises a value less than the first beam scanning factor.

28. The apparatus according to any one of claims 24 to 27, The at least one event includes a first event and a second event, and When the second event is triggered, the first event is indirectly triggered.

29. The apparatus according to any one of claims 24 to 28, The at least one event includes at least one condition. in, The at least one condition includes at least one of the following: Entry conditions, or Conditions for leaving, and The entry and exit conditions depend on the at least one measurement, a pre-configured threshold, and the hysteresis value of the at least one measurement.

30. The apparatus according to any one of claims 24 to 29, wherein the at least one event includes the completion of switching of the apparatus.

31. The apparatus according to any one of claims 24 to 29, wherein the at least one event comprises a time window.

32. The apparatus according to any one of claims 24 to 31, wherein the at least one measurement comprises at least one of the following: Reference signal received power, Reference signal reception quality, Received signal strength indicator, or Signal-to-interference-plus-noise ratio.

33. The apparatus according to any one of claims 24 to 32, wherein the instructions, when executed by the at least one processor, further cause the apparatus to at least: Send an instruction to the network element for the switching from the first beam scanning factor to the second beam scanning factor.

34. The apparatus according to any one of claims 24 to 33, wherein switching from the first beam scanning factor to the second beam scanning factor depends on the rate of change of the at least one measurement.

35. An apparatus comprising: At least one processor; as well as At least one memory, the at least one memory storing instructions that, when executed by the at least one processor, cause the device to at least: A configuration is used to configure a user equipment for switching from a first beam scanning factor to a second beam scanning factor based on at least one event occurring at the user equipment. as well as Receive from the user equipment an indication that the at least one event has occurred at the user equipment.

36. The apparatus of claim 35, wherein the at least one event is associated with a first measurement of the at least one measurement performed on the signal, the signal being transmitted in the serving cell of the user equipment.

37. The apparatus of claim 35 or 36, wherein the second beam scanning factor is associated with a second measurement in one of the at least one measurements performed on the signal, the signal being transmitted in the non-serving cell of the user equipment.

38. The apparatus according to any one of claims 35 to 37, wherein the configuration includes a plurality of measurements, and the reduction of the first beam scan factor can be applied to the plurality of measurements.

39. The apparatus of claim 38, wherein the plurality of measurements includes at least one of the following: Measurement of each synchronization signal block in the non-serving cell of the user equipment. Based on per-cell measurements of the synchronization signal blocks of the non-serving cells, Measurement of the per-channel state information reference signal for the non-serving cell. Based on per-cell measurements of the channel state information reference signal for the non-serving cell, or Based on per-cell measurements of both the synchronization signal block and the channel state information reference signal for the non-serving cell.

40. The apparatus according to any one of claims 35 to 39, wherein the second beam scanning factor comprises a value less than the first beam scanning factor.

41. The apparatus according to any one of claims 35 to 40, The at least one event includes a first event and a second event, and When the second event is triggered, the first event is indirectly triggered.

42. The apparatus according to any one of claims 35 to 41, The at least one event includes at least one condition. in, The at least one condition includes at least one of the following: Entry conditions, or Conditions for leaving, and The entry and exit conditions depend on at least one measurement, a pre-configured threshold, and a hysteresis value of the at least one measurement.

43. The apparatus according to any one of claims 35 to 42, wherein the at least one event includes the completion of the handover of the user equipment.

44. The apparatus according to any one of claims 35 to 42, wherein the at least one event comprises a time window.

45. The apparatus of claim 42, wherein the at least one measurement comprises at least one of the following: Reference signal received power, Reference signal reception quality, Received signal strength indicator, or Signal-to-interference-plus-noise ratio.

46. ​​The apparatus according to any one of claims 35 to 45, wherein the instructions, when executed by the at least one processor, further cause the apparatus to at least: The user equipment receives an indication of the switching from the first beam scanning factor to the second beam scanning factor.

47. A non-transitory computer-readable medium comprising program instructions stored thereon for performing the method according to any one of claims 1 to 21.

48. An apparatus comprising circuitry configured to cause the apparatus to perform the process according to any one of claims 1 to 23.

49. An apparatus comprising components for performing the process according to any one of claims 1 to 23.

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