Methods, apparatuses, and systems for mobility beam management

Abstract

Aspects of the disclosure introduce low-layer based mobility beam management methods, such as layer 1 (L1) and / or layer 2 (L2) based mobility beam management methods. One or more particular aspects disclosed herein can implement schemes for inter-cell mobility beam management. Examples of these aspects include: mobility beam based event tracking, including a function to indicate mobility beam events for a UE to track; default uplink (UL) resource configuration for mobility beam reporting, including a function to indicate a default BWP / PUCCH configuration for MBM reporting; and downlink resource configuration for mobility beam measurement, enabling a UE to update its internal configuration using compressed resource configuration.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to U.S. Provisional Application No. 63 / 025,408, filed May 15, 2020, entitled “Method, Apparatus, and System for Mobility Beam Management,” and U.S. Patent Application No. 17 / 318,469, filed May 12, 2021, entitled “Method, Apparatus, and System for Mobility Beam Management,” which are incorporated herein by reference in their entirety. Technical Field

[0003] The present invention generally relates to wireless communication, and in certain embodiments, to methods and apparatus for mobility beam management. Background Technology

[0004] In some wireless communication systems, user equipment (UE) communicates wirelessly with a base station to send and / or receive data from the base station. Wireless communication from the UE to the base station is called uplink (UL) communication. Wireless communication from the base station to the UE is called downlink (DL) communication.

[0005] Performing uplink and downlink communication in such a wireless communication system requires resources. For example, a base station can use radio signals and / or physical layer channels to wirelessly transmit data to the UE at a specific frequency for a specific duration in downlink transmission, such as a transport block (TB). The frequency and duration used are examples of resources.

[0006] Current methods for inter-cell mobility management in wireless communication systems (e.g., cellular systems) involve higher-layer signaling-based approaches, such as Layer 3 (L3) signaling methods. Examples of L3-based signaling methods include L3-based signaling for configuring devices for measuring reference signals and L3-based signaling for configuring devices for reporting cell-based events.

[0007] In some wireless communication systems, beamforming is used, where communication signals are transmitted in a specific direction rather than omnidirectionally. This beam-based signal transmission method focuses signal power in a specific direction, making it more likely to detect the signal at the destination. In some cases, transmitters in a communication cell can transmit in many directions, but by using multiple separate beams. Therefore, when a receiver moves relative to the transmitter, the transmitter can use different beams to maintain contact with the receiver. When the receiver moves between beams of a transmitter in the cell or moves away from the transmitter and toward an adjacent transmitter in a neighboring cell, the change in signal strength perceived by the receiver can be considered an event, causing the transmitter to change from one beam to another, or switch from that transmitter to an adjacent transmitter. Tracking cell-based events can lead to poor performance of beam-based deployments, particularly in terms of latency. Summary of the Invention

[0008] The embodiments described in this invention help address the problem of tracking beam-based mobility events by providing the network with a method for configuring a UE to track mobility beam management (MBM) events. Mobility beam management events can be reconfigured using MAC-CE commands. Furthermore, the embodiments described herein illustrate a method that enables a UE to report mobility measurements of such mobility beam management events without invoking higher-layer signaling (e.g., scheduling requests).

[0009] In some embodiments described in this invention, the UE is configured by the network to monitor certain mobility beam management reference signals (MBM-RS). Without losing generality, the UE receives various signals and channels in the wireless network throughout its lifetime. The UE may only detect the signals or channels it receives at a given time; similarly, the UE may only measure the signals or channels it is able to detect. In the context of this invention, the task of “monitoring a reference signal” means that the UE attempts to “detect and measure a reference signal.” Similarly, the task of “monitoring a beam” means that the UE “attempts to detect and measure a beam.” In this invention, the terms “MBM-RS” and “beam” are used interchangeably. If a reference signal is detected, the UE expects to measure that reference signal and generate a measurement result based on the type of measurement result configured by the network, such as: reference signal received power (RSRP), reference signal received quality (RSRQ), or signal-to-interference-and-noise ratio (SINR).

[0010] Some embodiments described in this invention assume that reference signals transmitted by different base stations are synchronized in both the time and frequency domains. This is achievable in tightly synchronized network deployments. In practice, this means that a UE monitoring reference signals transmitted by a serving base station or neighboring base stations can assume that all reference signals use the same timing reference as the serving base station. In the context of this invention, the timing reference corresponds to knowledge of time unit boundaries at a granularity such as orthogonal frequency division multiplexing (OFDM) symbols or OFDM symbol groups or mini-slots or slots or slot groups, and knowledge of the system frame number based on the definition of a so-called radio frame, which contains a given number of time units. Time unit boundaries are determined using synchronization signals, while the system frame number is broadcast by the cell as part of a broadcast channel, which is typically acquired as part of the initial access procedure.

[0011] Some embodiments described in this invention can assume that reference signals transmitted by different base stations are asynchronous in both the time and frequency domains. This is the case in loosely synchronized network deployments, where the UE can no longer assume that the timing reference of the reference signal transmitted by a neighboring base station is the same as the timing reference of the reference signal transmitted by the serving base station. The configuration of the reference signal transmitted by the neighboring base station can then include other information to assist the UE by providing an appropriate timing reference when monitoring the reference signal. As a first example, this information can be linked to or associated with a synchronization signal transmitted by the neighboring base station. As a second example, this information can be a system frame number offset used by the neighboring base station relative to the system frame number used by the serving base station. As a third example, this information can be the system frame number used by the neighboring base station. As a fourth example, this information can be a time unit offset used by the neighboring base station relative to the time slot boundary of a given time unit used by the serving base station, wherein the given time unit can also be a reference time unit, such as the first time unit in a radio frame. As a fifth example, this information can be the time unit used by the neighboring base station where the reference signal is located. Other combinations and permutations of the above examples are also conceivable.

[0012] The embodiments described in this invention facilitate efficient inter-cell mobility management because the network can notify the UE of specific MBM events that the network expects to report from the UE. The network also provides UL configuration information for the UE to use when a mobility beam-based event is triggered. Using resources configured by the UL configuration information reduces latency because the UE does not have to transmit mobility measurements via the physical uplink shared channel (PUSCH). In some embodiments, indicating uplink transmission resources for MBM reporting enables the UE to transmit mobility measurements directly based on the MBM-RS.

[0013] The embodiments described in this invention can help reduce the complexity of UE behavior. The UE only detects and measures MBM-RS indicated in mobility beam management (MBM) events. Detecting or measuring MBM-RS not indicated in the media access control-control element (MAC-CE) command consumes no processing power. Indicating UL physical uplink control channel (PUCCH) resources for mobility beam management (MBM) reporting allows the UE to directly transmit mobility measurements when an MBM event is triggered.

[0014] Various aspects of this invention provide a simplified method for MBM-RS resource configuration. As part of the inter-cell mobility process, the MBM reference signal can be reconfigured during handover using radio resource control (RRC) (or, if the MBM reference signal has a previous configuration, then the MBM reference signal is reconfigured). However, the reference signal configurations between different base stations often do not differ significantly in content. This allows for reconfiguration using the disclosed method. The time and frequency resources used by the MBM reference signal can be provided using predefined table values.

[0015] Using a table with predefined values ​​for the time and / or frequency configuration of the MBM reference signal allows the UE to quickly update its internal MBM reference signal configuration.

[0016] The reduced flexibility resulting from providing frequency-domain and / or time-domain configuration information associated with predefined reconfiguration indexes allows for low-overhead mobility commands. Lower overhead requirements enable the network to initiate such commands directly at the physical / media access control (PHY / MAC) layer, thereby reducing latency.

[0017] Various aspects of the present invention provide aperiodic / semi-static reporting based on radio resource management reference signal (RRM-RS), which enables efficient mobility management because the network informs the UE of the specific RRM-RS that the network wants the UE to measure and report.

[0018] Aperiodic / semi-static reporting based on RRM-RS can reduce the complexity of UE behavior. For example, the UE can detect and measure only the RRM-RS indicated in the aperiodic / semi-static reporting request, without consuming processing power to detect or measure RRM-RS not indicated in the aperiodic / semi-static reporting request.

[0019] According to one aspect of the present invention, a method for performing inter-cell mobility management is provided, the method comprising a UE receiving from a network higher-layer signaling including configuration information of a plurality of mobility beam management reference signals (MBM-RS) to enable the UE to measure MBM-RS transmitted by at least one base station in the network. The method further comprises the UE receiving from the network lower-layer signaling including additional information related to monitoring mobility beam management (MBM) events. In some embodiments, the lower-layer signaling may be at least one of Layer 1 (L1) signaling and Layer 2 (L2) signaling.

[0020] According to one aspect of the present invention, a method for performing inter-cell mobility management is provided, the method comprising a UE receiving from a network higher-layer signaling including configuration information of a plurality of MBM-RSs, enabling the UE to measure MBM-RSs transmitted by at least one base station in the network. The method further comprises the UE receiving from the network a physical downlink control channel (PDCCH), the PDCCH carrying downlink control information (DCI) messages including identifiers of at least one MBM-RS to be measured. The method further comprises sending a measurement report associated with the MBM-RS identified in the DCI message to the network. In some embodiments, the method includes measuring the at least one MBM-RS and generating the measurement report.

[0021] According to one aspect of the present invention, an apparatus is provided, the apparatus comprising a processor and one or more computer-readable media, wherein processor-readable instructions are stored on the one or more computer-readable media, the processor-readable instructions, when executed by the processor, perform the methods described above or as detailed below.

[0022] According to one aspect of the present invention, a method for performing inter-cell mobility management is provided, the method comprising sending higher-layer signaling, including configuration information of a plurality of MBM-RS, from a network to a UE, such that the UE is able to measure one or more MBM-RS transmitted by at least one base station in the network. The method further comprises sending lower-layer signaling, including additional information related to monitoring mobility beam management (MBM) events, from the network to the UE.

[0023] According to one aspect of the present invention, a method for performing inter-cell mobility management is provided, the method comprising sending higher-layer signaling, including configuration information of a plurality of MBM-RS, from a network to a UE, so that the UE can measure MBM-RS transmitted by at least one base station in the network. The method further comprises sending a PDCCH from the network to the UE, the PDCCH carrying a downlink control information (DCI) message including an identifier of at least one MBM-RS to be measured.

[0024] According to one aspect of the present invention, an apparatus is provided, the apparatus comprising a processor and one or more computer-readable media, wherein processor-readable instructions are stored on the one or more computer-readable media, the processor-readable instructions, when executed by the processor, perform the methods described and detailed below.

[0025] According to some aspects of the present invention, an apparatus is provided, the apparatus comprising modules or functional units for performing the methods described above and in detail below. Attached Figure Description

[0026] To provide a more comprehensive understanding of the embodiments of the present invention and their advantages, the following description is given with reference to the accompanying drawings, in which:

[0027] Figure 1A , Figure 1B and Figure 1C It is a schematic diagram of multiple frequency layers in the frequency domain, in the serving cell, and in adjacent cells that can be used in the telecommunications cell.

[0028] Figure 1D This is a flowchart illustrating an example of the L3-based inter-cell mobility management method currently supported by the New Radio (NR).

[0029] Figure 1E It is a schematic diagram of two adjacent cells, each containing multiple beams, and user equipment (UE) that travels along the path and interacts with the adjacent cells.

[0030] Figure 2 This is a schematic diagram of a communication system that can be implemented in an embodiment of the present invention.

[0031] Figure 3A and Figure 3B These are block diagrams of exemplary user equipment and base stations that can be implemented in embodiments of the present invention.

[0032] Figure 4AThis is an example of a time-domain representation of a reference signal for a corresponding beam of a first cell and a frequency-domain representation of the same reference signal that can be used by a UE for monitoring, provided by one aspect of the present invention.

[0033] Figure 4B This is a representation of configuration information provided by one aspect of the present invention for defining beam resource reference signals for a first cell used for inter-cell mobility.

[0034] Figure 4C This is a tabular list of frequency resource reconfiguration information provided by one aspect of the present invention.

[0035] Figure 4D This is a tabular list of time resource reconfiguration information provided by one aspect of the present invention.

[0036] Figure 4E This is an example of a media access control-control element (MAC-CE) command for inter-cell mobility provided by one aspect of the present invention.

[0037] Figure 4F This is an example of a time-domain representation of a reference signal for a corresponding beam of a second cell and a frequency-domain representation of the same reference signal that can be used by a UE for monitoring, provided by one aspect of the present invention.

[0038] Figure 4G This is one aspect of the invention providing a definition for inter-cell mobility. Figure 4F The diagram shows the configuration information of the beam resource reference signal for the second cell.

[0039] Figure 4H This is a flowchart of an exemplary process for achieving inter-cell mobility using Layer 1 / Layer 2 (L1 / L2) signaling, provided by one aspect of the present invention.

[0040] Figure 5A This is a representation of configuration information provided by one aspect of the present invention for defining beam resource reference signals for a first cell and a second cell for inter-cell mobility.

[0041] Figure 5B This is a representation of configuration information for defining beam reference signal events provided by one aspect of the present invention.

[0042] Figure 5C This is an example of a MAC-CE command provided by one aspect of the present invention for configuring event information associated with multiple reference signals for inter-cell mobility.

[0043] Figure 5DThis is one aspect of the invention provided for defining and Figure 5B The diagram shows the configuration information for different beam reference signal events.

[0044] Figure 5E This is an exemplary flowchart illustrating an exemplary process for achieving inter-cell mobility using L1 / L2 signaling, as provided in one aspect of the present invention.

[0045] Figure 6A This is another example of a MAC-CE command for defining a beam reference signal provided by one aspect of the present invention.

[0046] Figure 6B This is another example of a MAC-CE command for beam reference signals provided by one aspect of the present invention.

[0047] Figure 6C This is yet another flowchart illustrating an exemplary process for achieving inter-cell mobility using L1 / L2 signaling, as provided in one aspect of the present invention.

[0048] Figure 7A and Figure 7B This is an example of uplink channel configuration information provided by one aspect of the present invention for a UE to transmit beam reporting information for two different cells for inter-cell mobility.

[0049] Figure 7C yes Figure 7A and Figure 7B The frequency domain representation of the uplink channel configured in the middle.

[0050] Figure 7D This is another example of a MAC-CE command provided by one aspect of the present invention for providing configuration information of the uplink channel for the UE to transmit beam reporting information.

[0051] Figure 7E This is a tabular list of uplink resource reconfiguration information provided by one aspect of the present invention.

[0052] Figure 7F This is yet another flowchart illustrating an exemplary process for achieving inter-cell mobility using L1 / L2 signaling, as provided in one aspect of the present invention.

[0053] Figure 8 This is another flowchart illustrating an exemplary process for implementing an uplink transmission mechanism using L1 / L2 signaling, as provided in one aspect of the present invention.

[0054] Figure 9A This is an example of a MAC-CE command for inter-cell mobility provided by one aspect of the present invention.

[0055] Figure 9BThis is a flowchart illustrating an exemplary process for achieving inter-cell mobility using L1 / L2 signaling, as provided in one aspect of the present invention.

[0056] Figure 10A This is a flowchart illustrating an exemplary process for achieving inter-cell mobility using L1 / L2 signaling, as provided in one aspect of the present invention.

[0057] Figure 10B This is another example of the MAC-CE command for inter-cell mobility provided by one aspect of the present invention.

[0058] Figure 10C This is an example of a MAC-CE command for inter-cell mobility provided by one aspect of the present invention.

[0059] Figure 10D This is a flowchart illustrating an exemplary process for achieving inter-cell mobility using L1 / L2 signaling, as provided in one aspect of the present invention. Detailed Implementation

[0060] For illustrative purposes, specific exemplary embodiments are explained in more detail below with reference to the accompanying drawings.

[0061] The embodiments described herein illustrate information sufficient to practice the claimed subject matter and explain methods for practicing such subject matter. Those skilled in the art will understand the concepts of the claimed subject matter after reading the following description with reference to the accompanying drawings, and will recognize that the application of these concepts is not specifically mentioned herein. It should be understood that these concepts and applications are within the scope of this invention and the appended claims.

[0062] Furthermore, it should be understood that any module, component, or device with executable instructions disclosed herein may include or otherwise access one or more non-transitory computer / processor-readable storage media for storing information, such as computer / processor-readable instructions, data structures, program modules, and / or other data. A non-exhaustive list of examples of non-transitory computer / processor-readable storage media includes magnetic tape cassettes, magnetic tape, disk storage or other magnetic storage devices, compact disc read-only memory (CD-ROM), digital video disc or digital versatile disc (DVD), and Blu-ray disc. TMOptical discs or other optical storage devices; volatile and non-volatile, removable and non-removable media implemented in any method or technology; random-access memory (RAM); read-only memory (ROM); electrically erasable programmable read-only memory (EEPROM); flash memory or other storage technologies. Any of these non-transitory computer / processor storage media may be part of a device, or may be accessed by or connected to a device. Computer / processor-readable / executable instructions used to implement the applications or modules described herein may be stored in or otherwise preserved by such non-transitory computer / processor-readable storage media.

[0063] The following sections of this invention describe examples of L3-based inter-cell mobility management methods that can be used in the new radio (NR) standard, in order to provide a comparison with the L1 / L2-based inter-cell mobility management method provided by this invention (hereinafter referred to as the L1 / L2-based inter-cell mobility management method).

[0064] The UE performs radio resource management (RRM) measurements on reference signals and reports the results of these RRM measurements to the wireless network of the wireless communication system. This functionality is supported by higher-level signaling (i.e., higher-level messages), which may include one or more information elements (IEs) that provide the UE with configuration information about the specific reference signal (RS) that the UE should measure. An example of such an IE is a measurement configuration NR (MeasConfigNR) object. Each MeasConfigNR object includes resource configurations (e.g., synchronization signal / physical broadcast channel (SS / PBCH) blocks and channel state information reference signals (CSI-RS)) for the UE to perform RRM measurements on the reference signal.

[0065] The UE can be used for frequency-layer-based identification and cell identifiers, such as the physical cell identifier (PCI), to connect to the network. A frequency layer is defined as a combination of a center frequency and subcarrier spacing. A specific example will now be described where the UE is used to perform RRM measurements on two frequency layers, where the first frequency layer is referred to as "ssbFrequency1" in the example and the second frequency layer is referred to as "ssbFrequency2". Figure 1A An example of two bandwidths in the frequency domain is shown, each bandwidth corresponding to a frequency layer with a corresponding center frequency and a subcarrier spacing, where the subcarrier spacing represents the frequency distance between two subcarriers. Figure 1A The two bandwidths are labeled with their corresponding frequency layers "ssbFrequency1" and "ssbFrequency2" respectively.

[0066] In this invention, in a wireless communication system using, for example, New Radio (NR) radio access technology, there exists an entity called a "synchronization grating," which is a frequency table in which the UE can search for synchronization signals (i.e., SS / PBCH blocks). As part of performing a cell search process, the UE scans synchronization signals (i.e., SS / PBCH blocks) at different frequencies, attempts to detect synchronization signals (i.e., SS / PBCH blocks), and detects the PCI of cells in the network coverage area where the UE is located. Depending on the deployment of base stations in the network ("network deployment") and assumptions made as part of the deployment, different SS / PBCH blocks can be transmitted using different subcarrier intervals. Acquiring time and frequency synchronization is a process that the UE can undergo as part of the initial access process performed by the UE, as part of the RRM measurement for inter-cell mobility management. When the UE measures SS / PBCH blocks from neighboring cells, the UE may need to undergo the synchronization process again. The purpose of the synchronization signal is to allow the UE to acquire the symbol timing and subcarrier frequency of the downlink signal so that the UE knows the time-frequency resource grid that the downlink signal is using.

[0067] In embodiments of the method and apparatus of the present invention, a "cell" is a geographical area in which a UE can receive a reference signal (e.g., a synchronization signal) identified by a value using a physical cell identifier. A "base station" is a hardware device for a wireless network used to transmit and receive wireless signals. A cellular network (e.g., a radio access network) is a variant of a wireless network. A cellular network (e.g., a radio access network) provides coverage areas divided into "cells". In some cases, a cell can be served by multiple beams. To achieve 360° coverage in a cell, there can be various other alternative arrangements of 3 beams (each covering 120°), 6 beams (each covering 60°), or multiple beams covering a specific portion of the cell. The beam sizes do not need to be equal. For example, if a portion includes a high-usage-density part of the cell, several narrower beams can cover that area to provide higher bandwidth capacity for that portion, while fewer, wider beams can be used in the rest of the cell. When a UE moves, it can move from one cell to another, which requires the base station currently serving the UE in the cell the UE is leaving to switch to a new base station in the cell the UE is entering. Furthermore, within a cell, a UE can receive different beams when moving within the cell. When in the boundary area between cells, the UE can switch back and forth between adjacent cells because it finds that various beams in adjacent cells offer better service than other beams. The function of providing continuous cellular network coverage during UE movement is generally referred to as inter-cell mobility management.

[0068] In the NR (Normally Injected) context, the coverage area of ​​a cellular network (e.g., a radio access network) is the area where a UE can detect an SS / PBCH block with a given PCI value corresponding to a "cell". In a typical cellular network (e.g., a radio access network) deployment, a base station can transmit physical layer signals corresponding to one or more cells, while the physical layer signal corresponding to a single cell can only be transmitted by one base station. As part of an embodiment of the enhanced inter-cell mobility management method described herein, the terms "source cell" and "serving cell" are used interchangeably.

[0069] In this example, the UE is configured by a cellular network (e.g., a radio access network) to perform measurements on reference signals in the form of SS / PBCH blocks (also known as synchronization signal blocks, SSBs). The cell where the UE is currently located and serving the UE is referred to as the serving cell, and other neighboring cells are referred to as neighboring cells. The serving cell and neighboring cells each have an associated SSB index and a PCI used to identify reference signals from a set of reference signals with associated indices. The UE performs RRM measurements on both frequency layers and sends measurement reports of SSBs that the UE can detect. These measurement reports carry cell-based quality reports.

[0070] Figure 1B An example using the first frequency layer (ssbFrequency1) and six neighboring cells is shown. Figure 1C Seven neighboring cells using the second frequency layer (ssbFrequency2) are shown. Figure 1B and Figure 1C The cells in the diagram represent the same physical cells that communicate using different frequency layers. These two diagrams (e.g.) Figure 1B and Figure 1C The SSB index and PCI value labels for each corresponding cell are shown separately only for the purpose of explanation and to more clearly describe the markings.

[0071] Figure 1B The serving cell's SSB index is 0, PCI is 1. Neighboring cell #1's SSB index is 2, PCI is 2. Neighboring cell #2's SSB index is 3, PCI is 3. Neighboring cell #3's SSB index is 5, PCI is 4. Neighboring cell #4's SSB index is 7, PCI is 5. Neighboring cell #5's SSB index is 8, PCI is 6. Neighboring cell #6's SSB index is 9, PCI is 7.

[0072] exist Figure 1C In the above, the SSB index of neighboring cell #0 is 0, and the PCI is 11. The SSB index of neighboring cell #1 is 1, and the PCI is 12. The SSB index of neighboring cell #2 is 2, and the PCI is 13. The SSB index of neighboring cell #3 is 4, and the PCI is 14. The SSB index of neighboring cell #4 is 5, and the PCI is 15. The SSB index of neighboring cell #5 is 6, and the PCI is 16. The SSB index of neighboring cell #6 is 9, and the PCI is 17. The UE uses this to measure the SSB index {0,2,3,5,7,8,9} on ssbFrequency1 and the SSB index {0,1,2,4,5,6,9} on ssbFrequency2.

[0073] exist Figure 1B and Figure 1C In the diagram, the UE is shown near the edge of the serving cells of neighboring cells #1 and #2. After the UE performs the inter-cell mobility management method (i.e., the inter-cell mobility management process) and reports the measurement information to the cellular network (hereinafter referred to as the network), the network can send a handover command to the UE, instructing the UE to use the neighboring cells as the new serving cells.

[0074] Figure 1D This is the signaling that shows the signaling between the network (including the source cell 1 serving UE 3 and the neighboring cell 2 of the source cell) and the served UE 3. Figure 8 Although signaling Figure 8Only a single neighboring cell is shown, but it is understood that similar signaling may occur between UE 3 and multiple neighboring cells. Furthermore, the same process may occur for multiple UEs in the network (i.e., the process by which UE 3 measures the SS / PBCH blocks sent by the network through neighboring cells). The network (not shown) sends (5) higher-layer signaling (i.e., higher-layer messages) to UE 3 through source cell 1, such as radio resource control (RRC) signaling (i.e., RRC messages) with configuration information for UE 3. A specific example of such RRC signaling (i.e., RRC messages) may include a measurement object information element (IE) as part of a configuration message, such as “MeasObjectNR” IE. “MeasObjectNR” IE is a higher-layer parameter that the network uses to provide UE 3 with configuration information regarding radio resource management reference signals for performing mobility measurements. The network sends (10a) radio resource management (RRM) reference signals (e.g., SS / PBCH) through source cell 1 and (10b) RRM reference signals (e.g., SS / PBCH) through neighboring cell 2. UE 3 measures (15) signal strength, for example in the form of reference signals (e.g., received signal response power (RSRP), signal-to-noise ratio (SNR), received signal strength indicator (RSSI)) transmitted by the network through source cell 1 and neighboring cell 2. UE 3 sends (20) a cell-based measurement report to source cell 1. The network sends (i.e., transmits) a handover (HO) command (30) to UE 3 through source cell 1 in a higher-layer signaling (i.e., a higher-layer message), such as RRC signaling (i.e., an RRC message). An example of such RRC signaling (i.e., an RRC message) may include a “reconfigurationWithSync” configuration message. The network sends (40) neighboring cell system information to UE 3 through neighboring cell 2. UE 3 synchronizes (45) with neighboring cell 2 and obtains system information (SI) and cell-specific information transmitted by the network to neighboring cell 2. UE 3 sends (50) higher-layer signaling (i.e., higher-layer messages) to neighboring cell 2, such as RRC signaling (i.e., RRC messages), which indicates that reconfiguration is complete.

[0075] After receiving a handover command carrying configuration information for UE 3 (an example being the "reconfigurationWithSync" message), UE 3 achieves physical layer synchronization with neighboring cell 2 and obtains system information (i.e., master information block (MIB)) and cell-specific information (e.g., system information block (SIB1)) from the network through neighboring cell 2. Upon completion of the random access (RA) procedure (i.e., the RA process), UE 3 sends (i.e., transmits) an RRC reconfiguration completion message to confirm the completion of the HO procedure.

[0076] Figure 1E This is an example of two neighboring cells, each with multiple beams. Path 93 of UE 97 is also shown moving through an area served by the two cells. The first cell 90, including the serving base station (gNB) 91, is shown as having four beams 90a, 90b, 90c, and 90d. A first reference signal RS#1 is transmitted on beam 90a. A second reference signal RS#2 is transmitted on beam 90b. A third reference signal RS#3 is transmitted on beam 90c. A fourth reference signal RS#4 is transmitted on beam 90d. The second cell 95, including a neighboring base station (gNB) 96, is shown as having four beams 95a, 95b, 95c, and 95d. A first reference signal RS#1 is transmitted on beam 95a. A second reference signal RS#2 is transmitted on beam 95b. A third reference signal RS#3 is transmitted on beam 95c. A fourth reference signal RS#4 is transmitted on beam 95d. The reference signal for each of the first cell 90 and the second cell 95 is defined by a corresponding scrambling identifier, which is different for different cells. For example, RS#1 of the first cell 90 and RS#1 of the second cell 95 have different scrambling identifiers, even though they are considered to be RS#1 of their respective cells.

[0077] UE 97 is shown on path 93, which is located at the beam 90d closest to the first cell 90. However, it can be seen that path 93 brings UE 97 closer to beam 95b of the second cell 95, and also closer to beam 95c of the second cell 95. Aspects of the invention will describe how the UE can measure a reference signal on the beam that UE 97 is approaching in order to determine which beam UE 97 should use to obtain optimal signal reception. This may result in UE 97 switching from the first cell 90 to the second cell 95, or vice versa.

[0078] This invention relates to a method for tracking inter-cell mobility events based on transmission beams. Typical inter-cell mobility management methods require the UE to track inter-cell mobility events on a cell-by-cell basis, which is inefficient in beam-based deployments. An example of a beam-based deployment is a frequency range 2 (FR2) implementation. Furthermore, mobility management methods are based on higher-layer signaling, such as L3 signaling, which typically uses radio resource control (RRC) signaling. L3-based signaling itself introduces latency because messages must traverse several layers.

[0079] Mobility management methods typically include: explicit synchronization of the UE with neighboring cells at the physical layer, the neighboring cells also referred to as the target cells (the cells being handed over to), and obtaining system information and cell information before the target cells can begin transmitting physical downlink shared channel (PDSCH) transmissions that schedule the transmission of physical downlink control channel (PDCCH) carrying UE-specific data.

[0080] Various aspects of this invention relate to a method for reporting inter-cell mobility events based on transmission beams. As described above, conventional inter-cell mobility methods rely on L3-based cell-based events. Whenever an inter-cell mobility event is triggered, an inter-cell measurement report is generated and sent to lower layers. The inter-cell measurement report is transmitted to the network via uplink (UL) PUSCH transmission, whereby the measurement report ultimately reaches the RRC layer of the serving base station.

[0081] This invention describes low-level signaling, such as L1 and / or L2 signaling, based on mobility beam management methods. One or more specific aspects disclosed herein can implement methods for mobility beam management, including but not limited to the following functionalities:

[0082] Mobility beam-based event tracking, including the ability to indicate which mobility beam events the UE should track;

[0083] The default UL resource configuration for mobility beam reporting includes functions that indicate the default bandwidth part (BWP) and PUCCH configuration for MBM reporting;

[0084] Compressed downlink resource configuration for mobility beam measurement enables the UE to update its internal configuration using compressed resource configuration.

[0085] In some beam-based network deployments, a UE may be in a cell with different beam sets at different times. In some embodiments, by configuring the network to use mobility beam-based event information, the UE can track specific mobility events based on beams and report measurements to the network based on these events.

[0086] In the embodiments described in this invention, unless otherwise indicated, the MBM reference signal may be a beam management (BM) reference signal or a mobility / RRM reference signal. Furthermore, in the embodiments described in this invention, unless otherwise indicated, references to mobility beam and MBM reference signal are used interchangeably.

[0087] The embodiments described herein are applicable to wireless networks such as wireless cellular networks. The types of network nodes that can be used in such wireless cellular networks can be conventional base stations (e.g., towers with sectors), flying base stations (e.g., drones), and aircraft (e.g., balloons, airplanes).

[0088] The following text Figure 2 , Figure 3A and Figure 3B This provides context for networks and devices of wireless communication systems that can implement various aspects of the inter-cell mobility management method of the present invention.

[0089] Figure 2 An exemplary wireless communication system 100 (hereinafter referred to as System 100) is illustrated, which includes a network that can implement embodiments of the inter-cell mobility management method of the present invention. Typically, System 100 enables multiple wireless or wired components to transmit data and other content. The purpose of System 100 may be to provide content (voice, data, video, text) via broadcast, narrowcast, user equipment to user equipment, etc. System 100 can operate efficiently by sharing resources such as bandwidth.

[0090] exist Figure 2 In the example shown, system 100 includes electronic devices (EDs) 110a to 110c (typically referred to as ED 110), radio access networks (RANs) 120a and 120b (typically referred to as RAN 120), a core network 130, a public switched telephone network (PSTN) 140, the Internet 150, and other networks 160. Although Figure 2 A certain number of these components or elements are shown, but the system 100 may include any number of these components or elements.

[0091] EDs 110a to 110c are used for operation, communication, or both in system 100. For example, EDs 110a to 110c are used for transmitting, receiving, or both via a wireless communication channel. Each of EDs 110a to 110c represents any suitable end-user equipment for wireless operation and may include (or be referred to as) devices such as: user equipment (UE), wireless transmit / receive unit (WTRU), mobile station, mobile subscriber unit, cellular telephone, station (STA), machine type communication (MTC) device, personal digital assistant (PDA), smartphone, laptop computer, computer, touchpad, wireless sensor, or consumer electronic device. EDs 110a to 110c are as described above. Figure 1B , Figure 1C and Figure 1D The UE and 4H mentioned below Figure 5E , Figure 6C , Figure 7F , Figure 8 , Figure 9B and Figure 10D Examples of UEs 453, 583, 683, 753, 803, 953, and 1053.

[0092] exist Figure 2In this configuration, RAN 120a and 120b include base stations 170a and 170b, respectively. Each base station 170a and 170b (often referred to as base station 170) is used to wirelessly connect, access, or communicate with one or more EDs from ED 110a to 110c, enabling access to any other base stations 170a and 170b, core network 130, PSTN 140, Internet 150, and / or other networks 160. For example, base stations 170a and 170b may include (or may be) one or more of several known devices, such as a base transceiver station (BTS), Node-B (NodeB), evolved NodeB (eNodeB), home eNodeB, gNodeB, transmission and receive point (TRP), site controller, access point (AP), or wireless router. Alternatively, any ED110a to 110c can be used to connect, access, or communicate with any other base stations 170a and 170b, the Internet 150, the core network 130, the PSTN 140, other networks 160, or any combination thereof. Base stations of RAN 120, such as base station 170a of RAN 120a and base station 170b of RAN 120b, can access the core network 130 via the Internet 150, as shown in the figure.

[0093] EDs 110a to 110c, as well as base stations 170a and 170b, are examples of communication devices or apparatuses that can be used to implement some or all of the functions and / or embodiments of the inter-cell mobility management method described herein. Figure 2In the illustrated embodiment, base station 170a constitutes part of RAN 120a (i.e., is included in RAN 120a), which may include other base stations, one or more base station controllers (BSCs), one or more radio network controllers (RNCs), relay nodes, components, and / or devices. Either base station 170a or 170b may be a single component, as shown, or multiple components distributed within the corresponding RAN, etc. Furthermore, base station 170b forms part of RAN 120b (i.e., is included in RAN 120b), and RAN 120b may include other base stations, components, and / or devices. Each base station 170a and 170b transmits and / or receives radio signals within a specific geographical area (sometimes referred to as a "cell"). For example, a cell may be further divided into sectors, and base stations 170a and 170b may employ multiple transceivers to provide services to multiple sectors. Base stations, such as base stations 170a and 170b, are used to provide... Figure 1B , Figure 1C and Figure 1D Examples of communication devices or apparatuses for the source cell and neighboring cells are shown in the accompanying figures below. In some embodiments, a picocell or femtocell may be established by a base station 170 of the RAN, wherein radio access technology supports such use cases based on heterogeneous network deployments. In some embodiments, each cell may use multiple transceivers by employing, for example, multiple-input multiple-output (MIMO) technology. Figure 2 The number of RANs shown is merely exemplary. Network service providers may include any number of RANs in system 100.

[0094] Base stations 170a and 170b use radio frequency (RF), microwave, infrared (IR), or other wireless communication links to wirelessly connect, access, or communicate with one or more EDs 110a to 110c via one or more air interfaces 190. Air interface 190 can utilize any suitable wireless access technology. For example, communication system 100 can implement one or more orthogonal or non-orthogonal channel access methods in air interface 190, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or single-carrier FDMA (SC-FDMA).

[0095] Base stations 170a and 170b can implement Universal Mobile Telecommunication System (UMTS) Universal Terrestrial Radio Access (UTRA) to establish an air interface 190 using wideband CDMA (WCDMA). In this case, base stations 170a and 170b can implement protocols such as High Speed ​​Packet Access (HSPA), Evolved HPSA (HSPA+), where HSPA+ optionally includes High Speed ​​Downlink Packet Access (HSDPA), High Speed ​​Uplink Packet Access (HSUPA), or both. Alternatively, base stations 170a and 170b can use LTE, LTE-A, and / or LTE-B to establish an air interface 190 with evolved UTMS Terrestrial Radio Access (E-UTRA). It is conceivable that system 100 can use multi-channel access capabilities, including those methods described above. Other wireless technologies used for air interface implementation include IEEE 802.11, 802.15, 802.16, CDMA2000, CDMA2000 1X, CDMA2000 EV-DO, IS-2000, IS-95, IS-856, GSM, EDGE, and GERAN. Of course, other multiple access methods and wireless protocols can also be used.

[0096] RANs 120a and 120b communicate with core network 130 to provide various services, such as voice, data, and other services, to EDs 110a through 110c. RANs 120a and 120b and / or core network 130 may communicate directly or indirectly with one or more other RANs (not shown), which may (or may not) be directly served by core network 130 and may (or may not) employ the same radio access technology as RANs 120a, RAN 120b, or both. Core network 130 may also act as a gateway between (i) RANs 120a through 120b or EDs 110a through 110c or both and (ii) other networks (e.g., PSTN 140, Internet 150, and other networks 160).

[0097] ED 110a to 110c can also use wireless communication links, such as radio frequency (RF), microwave, infrared (IR), etc., to wirelessly connect, access, or communicate with each other through one or more SL air interfaces 180.

[0098] Furthermore, some or all of ED 110a to 110c may include the ability to communicate with different wireless networks via different wireless links using different wireless technologies and / or protocols. Instead of wireless communication (or other than wireless communication), ED 110a to 110c may communicate with network service providers (not shown) or exchanges (not shown) via wired communication channels and with the Internet 150. PSTN 140 may include a circuit-switched telephone network for providing plain old telephone service (POTS). The Internet 150 may include a network of computers and subnets (intranets) or both, incorporating protocols such as Internet Protocol (IP), Transmission Control Protocol (TCP), and User Datagram Protocol (UDP). ED 110a to 110c may be multimode devices capable of operating according to multiple wireless access technologies and include multiple transceivers required to support multiple wireless access technologies.

[0099] Figure 3A and Figure 3B An exemplary device is shown that can implement the inter-cell mobility management method and teachings provided by the present invention. Specifically, Figure 3A An example ED 110 is shown. Figure 3B An exemplary base station 170 is shown. These components can be used in system 100 or any other suitable system.

[0100] like Figure 3A As shown, ED 110 includes at least one processing unit 200. The processing unit 200 implements various processing operations of ED 110. For example, the processing unit 200 may perform signal decoding, data processing, power control, input / output processing, or any other function that enables ED 110 to operate within communication system 100. The processing unit 200 may also be used to implement some or all of the functions and / or embodiments of the inter-cell mobility management method described in more detail herein. Each processing unit 200 includes any suitable processing or computing device for performing one or more operations. For example, each processing unit 200 may include a microprocessor, microcontroller, digital signal processor, field-programmable gate array, or application-specific integrated circuit.

[0101] ED 110 also includes at least one transceiver 202. Transceiver 202 is used to modulate data or other content for transmission via at least one antenna 204 or a network interface controller (NIC) (not shown). Transceiver 202 is also used to demodulate data or other content received via at least one antenna 204. Each transceiver 202 includes any suitable structure for generating signals for wireless transmission via antenna 204 or wired transmission via NIC (not shown) and / or processing signals for wireless reception via antenna 204 or wired reception via NIC (not shown). Each antenna 204 includes any suitable structure for transmitting and / or receiving wireless signals and / or each NIC (not shown) includes any suitable structure for transmitting and / or receiving wired signals. One or more transceivers 202 may be used (i.e., included) in ED 110. One or more antennas 204 may be used (i.e., included) in ED 110. Although transceiver 202 is shown as a single functional unit, it can also be implemented using at least one transmitter and at least one separate receiver.

[0102] ED 110 also includes one or more input / output devices 206 or other interfaces (such as a wired interface to the Internet 150). Input / output devices 206 enable users to interact with ED 110. Each input / output device 206 includes any suitable structure for providing or receiving information from the user. Examples of input / output devices 206 include speakers, microphones, keypads, keyboards, displays, or touchscreens, and suitable structures may be communication interfaces, such as peripheral buses. Other interfaces of ED 110 enable ED 110 to interact, access, or communicate with other devices via the Internet 150, such as other ED 110s, servers, cloud computing platforms, etc.

[0103] Furthermore, ED 110 includes at least one memory 208. Memory 208 stores instructions and data used, generated, or collected by ED 110. For example, memory 208 may store software instructions that implement some or all of the functions and / or embodiments of the inter-cell mobility management method described above and are executable by one or more processing units 200. Each memory 208 includes any suitable one or more volatile and / or non-volatile storage and retrieval devices. Any suitable type of memory can be used, such as random access memory (RAM), read-only memory (ROM), hard disk, optical disk, subscriber identity module (SIM) card, memory stick, secure digital (SD) memory card.

[0104] like Figure 3B As shown, base station 170 includes at least one processing unit 250, at least one transmitter 252, at least one receiver 254, one or more antennas 256, at least one memory 258, and one or more input / output devices 266 or other interfaces (not shown). Transceivers (not shown) may be used instead of transmitters 252 and receivers 254. Scheduler 253 may be coupled to processing unit 250. Scheduler 253 may be included within base station 170 or may operate separately from base station 170. Processing unit 250 implements various processing operations of base station 170, such as signal decoding, data processing, power control, input / output processing, or any other functions. Processing unit 250 may also be used to implement some or all of the functions and / or embodiments described in more detail above. Each processing unit 250 includes any suitable processing or computing device for performing one or more operations. For example, each processing unit 250 may include a microprocessor, microcontroller, digital signal processor, field-programmable gate array, or application-specific integrated circuit.

[0105] Each transmitter 252 includes any suitable structure for generating signals to wirelessly transmit to one or more EDs 110 or wired to other base stations 170, core network 130, or Internet 150. Each receiver 254 includes any suitable structure for processing signals wirelessly received from one or more EDs or wiredly received from other base stations 170, core network 130, or Internet 150. Although shown as separate components, at least one transmitter 252 and at least one receiver 254 may be combined into a single component, commonly referred to as a transceiver. Each antenna 256 includes any suitable structure for wirelessly transmitting signals received from transmitter 252 and / or receiving wireless signals from ED 110. Although a shared antenna 256 is shown herein coupled to transmitter 252 and receiver 254, one or more antennas 256 may be coupled to transmitter 252, and one or more individual antennas 256 may be coupled to receiver 254. Each memory 258 includes any suitable volatile and / or non-volatile storage and retrieval device, such as those described above in conjunction with ED 110. The memory 258 stores software instructions and data used, generated, or collected by the base station 170. For example, the memory 258 may store software instructions or modules that implement some or all of the functions and / or embodiments of the inter-cell mobility management method described above and that can be executed by one or more processing units 250.

[0106] Each input / output device 266 enables a user to interact with base station 170. Each input / output device 266 includes any suitable structure, such as a peripheral bus, for providing or receiving information from the user. Other interfaces of base station 170 enable base station 170 to interact, access, or communicate with other devices via Internet 150, such as other ED 110, servers, cloud computing platforms, etc.

[0107] Further details regarding UE 110 and base station 170 are known to those skilled in the art. Therefore, for clarity, these details are omitted herein.

[0108] Figure 1E The physical arrangement of the first unit 90 and the second unit 95 shown will now also be used to describe various embodiments of the invention.

[0109] The following embodiments relate to DL resource reconfiguration based on L1 / L2 signaling for mobility beam management, and provide detailed examples of UE resource reconfiguration. In the context of this invention, it is assumed that information associated with the mobility beam management reference signal (MBM-RS) identifying the beam transmitted by the first base station using a specific index is updated to correspond to the MBM-RS being transmitted by the second base station (using the same index as previously used). For example, if the index used for the first beam information is index #1 of the first base station, then the beam information of the second base station is also associated with index #1. However, regardless of the index of the MBM-RS, the principle of updating information associated with the MBM-RS can be applied.

[0110] Back Figure 1E UE 97 moves along path 93, depicted by the black dashed line. (The sentence appears to be incomplete and requires further context.) Figure 1E The UE 97 at the indicated location is connected to the serving gNB 91 to receive signaling via beam 90d.

[0111] Assume that after completing the initial access procedure performed by UE 97, the network sends an initial RRC configuration message to UE 97, which contains configuration information for the MBM-RS associated with the beam serving gNB 91. UE 97 receives the configuration information and configures itself to define the four MBM-RS on the corresponding beam used by base station 91, denoted as RS#1 to RS#4. Figure 4A and Figure 4B The document illustrates the extraction of time / frequency configuration for MBM-RS and corresponding RRC configuration information for RS#1 to RS#4.

[0112] Figure 4A The time-domain representation of the reference signal (i.e., MBM-RS) is shown. Figure 4A The top chart in the graph has increasing time along the horizontal axis and frequency domain representation ( Figure 4A The bottom chart in the diagram shows various frequency bands along the horizontal axis. In the time domain representation, reference signals RS#1 and RS#2 are shown occupying time slot 0, and reference signals RS#3 and RS#4 are shown occupying time slot 2. The reference signals are repeated in the same manner in time slots 5 and 7. In the frequency domain representation, reference signals RS#1, RS#2, RS#3, and RS#4 are shown occupying four adjacent bandwidth portions.

[0113] Figure 4B This is an example of configuration information used by the UE, which enables the UE to configure itself to identify reference signals that can be measured by the UE, for example... Figure 4A or Figure 1E The reference signal shown. Figure 4B The hierarchical numbering of parameters shown in the subsequent figures, labeled as levels 1>, 2>, 3>, etc., is for ease of understanding of the information included in the configuration information, and it should be understood that this configuration information may not include explicit level labels. For each of the four beams, for example... Figure 1E The service gNB 90 has four beams 90a, 90b, 90c, and 90d, and reference signals corresponding to these beams are identified by parameters, such as, but not limited to, reference signal resource identifiers (e.g., channel state identifier reference signal (CSI-RS) - ResourceID), scrambling identifiers (e.g., scramblingID), period and offset information, and resource mapping information. The reference signal resource identifier period and offset information, as well as the resource mapping information, can be considered as time-frequency resource information.

[0114] exist Figure 4BIn the first level, "1>", the naming rules for reference signal measurement configuration information (e.g., CSI-MeasConfig) are defined. Level 2, "2>", includes naming rules for adding or modifying reference signals (e.g., using CSI-RS=ResourceToAddModList). Level 3, "3>", includes naming rules for defining resources (e.g., CSI-RS resources) to be used for the reference signal. Levels 4 and 5, "4>" and "5>", define various parameters of the reference signal. For each reference signal, there is a resource identifier (CSI-RS-ResourceID), a scrambling identifier "scramblingId", and resource mapping information, which may include a frequency band defined based on the starting resource block (RB) and the number of RBs allocated. The first reference signal has CSI-RS-ResourceID=1 and scramblingID=9. The bandwidth mapping information (defining the bandwidth part (BWP)) is defined as having startingRB = 4 and numberofRBs = 48. The second reference signal has CSI-RS-ResourceID = 2, scramblingID = 9, and its bandwidth mapping information is defined by startingRB = 54 and numberofRBs = 48. The third reference signal has CSI-RS-ResourceID = 3, scramblingID = 9, and its bandwidth mapping information is defined by startingRB = 104 and numberofRBs = 48. The fourth reference signal has CSI-RS-ResourceID = 4, scramblingID = 9, and its bandwidth mapping information is defined by startingRB = 154 and numberofRBs = 48.

[0115] To provide configuration information to the UE, the network sends (i.e., transmits) a MAC-CE mobility command to the UE via the serving gNB, carrying an indication to update the MBM-RS configuration of RS#1 to RS#4. The MAC-CE mobility command can be sent, for example, on the physical download shared channel (PDSCH). In some embodiments, the UE sends an acknowledgment of the PDSCH carrying the MAC-CE command to the network via the serving gNB within a defined time. In some examples, the defined time indicated here may be the processing delay required for the UE to process data blocks in the PDSCH transmission and send the acknowledgment to the MAC layer. This processing delay is known to both the network and the UE and allows both the network and the UE to understand each other when the UE will apply the MAC-CE command. As a non-limiting example, in NR-based 5G systems, this processing delay is specifically specified in the 5G specification as equal to 3 milliseconds (ms). After acknowledging the MAC-CE command, the UE applies the contents of the MAC-CE command. For example, the UE updates the MBM-RS configuration information based on the information sent in the MAC-CE command. The UE then performs detection and measurement on the updated MBM-RS for use in mobility beam management.

[0116] This embodiment can be applied to scenarios where the UE moves between different base stations and needs to be informed of the mobility beams that should be detected, measured, and reported from different base stations. Reconfiguration using higher-layer signaling, such as L3 signaling, is entirely flexible, but it is time-consuming. In contrast, reconfiguration based on lower-layer signaling, such as L1 / L2 signaling, may be less flexible but faster to implement. This reconfiguration via L1 / L2 signaling allows the network to select a set of configuration information parameters from a predefined set of such configuration information parameter groups. In some embodiments, the configuration information parameter groups are stored in tabular form. Using this reconfiguration process allows the network to update specific aspects of the reference signal configuration relevant to detection and measurement purposes, while limiting the set of available values ​​to specific values ​​of interest. Examples of frequency resource reconfiguration and time resource reconfiguration tables are respectively provided in [reference to specific tables]. Figure 4C and Figure 4D As shown in the image.

[0117] Figure 4C An example of a table list of indexed values ​​(found in the column identified as the Frequency Resource Reconfiguration field) is shown, which can be used to provide information on various different values ​​for two specific frequency domain-related parameters. Figure 4CIn the example, there are 64 distinct index values, ranging from 0 to 63. These index values ​​can be represented using a 6-bit binary field. The two frequency-domain related parameters represented by these 64 distinct index values ​​are the starting resource block (RB) value and the reference signal (RS) bandwidth value. Index value "0" is shown as corresponding to an RB of 10 and an RS bandwidth of 24. Index value "1" is shown as corresponding to an RB of 70 and an RS bandwidth of 24. The remaining index values ​​correspond to other RB and RS bandwidth values, reserving at least one index value for some other purpose. Therefore, a pair of values ​​for the RB and RS bandwidth can be represented by a single index value.

[0118] Figure 4D An example of a list of index values ​​(found in the column identified as the Time Resource Reconfiguration field) is shown, which can be used to provide information on various index values ​​for three specific time-domain related parameters. Figure 4D In the example, there are 64 distinct index values, ranging from 0 to 63. These index values ​​can be represented using a 6-bit binary field. The three time-domain related parameters represented by these 64 distinct index values ​​are the first OFDM symbol (firstOFDMSymbolinTimeDomain) value, the slot period (slotPeriodicity) value, and the slot offset (slotOffset) value. The index value "0" is shown as corresponding to a first OFDM symbol of 0, a slot period of 4, and a slot offset of 0. The index value "1" is shown as corresponding to a first OFDM symbol of 0, a slot period of 4, and a slot offset of 2. The remaining index values ​​correspond to other first OFDM symbol values, slot period values, and slot offset values, reserving at least one index value for some other purpose. Therefore, the set of firstOFDMSymbolinTimeDomain values, slotPeriodicity values, and slotOffset values ​​can be represented by a single index value.

[0119] Figure 4C and Figure 4D The examples are not intended to be limited to the information shown. For example, the list may include a number of values ​​greater than 64 or less than 64. Furthermore, additional time-domain or frequency-domain configuration parameters can be added to provide additional configuration information for a given index value. Also, the values ​​for these parameters in the table are merely examples, and it should be understood that these values ​​can be any values ​​relevant to a specific network. Additionally, there may be no reserved fields or more... Figure 4C and Figure 4D Each of the fields shown in the diagram represents a reserved field.

[0120] Figure 4EThis is an example of a MAC-CE 400 command that the network can send, which can provide MBM-RS configuration information to the UE. The exemplary MAC-CE command 400 and other MAC-CE commands described in other examples below are schematic diagrams representing the various fields consisting of one or more bits included in the MAC-CE command.

[0121] The MAC-CE command 400 contains (i.e. carries) configuration information for each reference signal, including a scrambling identifier, a reference signal index, and a time-frequency resource reconfiguration field. The scrambling identifier in the MAC-CE command 400 is identified by the scrambling identifier field 410. For the first beam, the reference signal index (i.e., for CS-RS) is identified in the CSI-RS index field 412a, the frequency resource reconfiguration (FRR) information is identified in the FRR field 414a, and the time resource reconfiguration (TRR) information is identified in the TRR field 416a. For the second beam, the reference signal index (i.e., for CS-RS) is identified in the CSI-RS index field 412b, the frequency resource reconfiguration information is identified in the FRR field 414b, and the time resource reconfiguration information is identified in the TRR field 416b. For the third beam, the reference signal index (i.e., for CS-RS) is identified in the CSI-RS index field 412c, frequency resource reconfiguration information is identified in the FRR field 414c, and time resource reconfiguration information is identified in the TRR field 416c. For the fourth beam, the reference signal index (i.e., for CS-RS) is identified in the CSI-RS index field 412d, frequency resource reconfiguration information is identified in the FRR field 414d, and time resource reconfiguration information is identified in the TRR field 416d. Several additional fields 418 are reserved for other information. However, not all implementations necessarily have reserved fields. Figure 4E This is a specific example of MAC-CE command 400, but other examples of MAC-CE commands may include additional fields. Figure 4E The fields shown are arranged in different orders and / or multiple instances of the same field type.

[0122] based on Figure 4E The content of the field shown in the Mobility MAC-CE command 400, which applies... Figure 4C and Figure 4D Specific indexes in the frequency and time resource reconfiguration fields can update the UE's internal MBM-RS configuration to monitor for frequencies and times. Figure 4F The reference signal for the time-domain and frequency-domain resource characteristics shown is illustrated.

[0123] Figure 4F The time-domain representation of the reference signal is shown. Figure 4F The top chart in the graph has increasing time along the horizontal axis and frequency domain representation ( Figure 4F The bottom chart in the diagram shows various frequency bands along the horizontal axis. In the time domain representation, reference signals RS#1, RS#2, RS#3, and RS#4 are all shown occupying time slot 0. The reference signal is repeated in the same manner in time slot 5. In the frequency domain representation (various frequency bands along the horizontal axis), reference signals RS#1, RS#2, RS#3, and RS#4 are shown occupying four bandwidth portions with bandwidth gaps between the frequency bands.

[0124] Figure 4G This is an example of configuration information, which uses the same configuration information as... Figure 4B A similar hierarchical arrangement is used by the UE to enable the UE to configure itself to identify reference signals transmitted by the network through the serving base station or neighboring base stations, which can be measured by the UE. For each of the four beams, for example... Figure 1E The beams 95a, 95b, 95c, and 95d of the neighboring cells 95 are used to identify the reference signal to be measured based on the reference signal resource identifier (e.g., CSI-RS-ResourceID), scrambling identifier (scramblingID), period and offset information, and resource mapping information. The period and offset (which define the frequency at which the reference signal is repeated and the offset from a specified starting symbol) are defined by the period according to the specific time slot in which the reference signal recurs, and are identified here by the parameter slots5 used to identify the time slot group of five repeating time slots and the offset (firstOfdmSymbol) value relative to the first OFDM symbol. Figure 4GIn the first reference signal, CSI-RS-ResourceID = 1, scrapingID = 57, the period and offset are defined by slots5 = 0 and firstOfdmSymbol = 0, and the band mapping information is defined by startingRB = 10 and numberofRBs used = 24. For the second reference signal, CSI-RS-ResourceID = 2, scrapingID = 57, the period and offset are defined by slots5 = 0 and firstOfdmSymbol = 0, and the band mapping information is defined by startingRB = 70 and numberofRBs used = 24. For the third reference signal, CSI-RS-ResourceID = 3, scrapingID = 57, the period and offset are defined by slots5 = 0 and firstOfdmSymbol = 0, and the band mapping information is defined by startingRB = 130 and numberofRBs used = 24. For the fourth reference signal, CSI-RS-ResourceID=4, scramblingID=57, the period and offset are defined by slots5=0, firstOfdmSymbol=0, and the band mapping information is defined by startingRB=190 and numberofRBs used=24.

[0125] Figure 4H This is an exemplary signaling diagram 450 illustrating the exchange of signaling (i.e., messages) between network (NW) 451 and one of one or more UEs 453 served by network 451, as well as actions in response to messages received from network 451. Network 451 includes a serving cell serving one or more UEs including UE 453 and at least one neighboring cell of that serving cell. Figure 4H The network 451 shown includes multiple cells. (See reference...) Figure 1E As described, from the perspective of a given UE, there exists a serving cell that serves the UE and other cells adjacent to the serving cell; these other cells are considered neighboring cells of the serving cell. The serving cell can send higher-layer signaling messages and lower-layer signaling messages to the UE. Both the serving cell and neighboring cells can send mobility beam management reference signals to the UE.

[0126] Network 451 (through the serving cell and / or neighboring cells of the source cell serving UE 453) sends (i.e. transmits) (455) higher-layer signaling (i.e., higher-layer messages), such as RRC signaling (i.e., RRC messages) with mobility beam management reference signal (MBM-RS) configuration information for UE 453. The higher-layer signaling (i.e., higher-layer messages) may be Layer 3 (L3) signaling (i.e., L3 messages). Network 451 (through the serving cell or neighboring cells) sends (460) lower-layer signaling (i.e., lower-layer messages) in the form of L1 signaling (i.e., L1 messages) or L2 signaling (i.e., L2 messages) to UE 453, such as MAC-CE commands (e.g., MAC-CE command 400), which includes additional configuration information in the form of time-frequency MBM-RS configuration information. UE 453 may send a MAC-CE acknowledgment (not shown) to network 451 via the serving cell or a neighboring cell. This MAC-CE acknowledgment indicates that UE 453 has successfully received the MAC-CE command (e.g., MAC-CE command 400). UE 453 updates (465) the MBM-RS time-frequency configuration information based on the information in the MAC-CE command. Network 451 sends (470) the MBM-RS, which may be at least one of the serving cell sending the MBM-RS and the neighboring cell sending the MBM-RS. Based on the MAC-CE command (e.g., MAC-CE command 400), UE 453 detects and measures (475) the MBM-RS sent by network 451 via the serving cell or a neighboring cell based on the new time-frequency MBM-RS configuration information in the MAC-CE command (e.g., MAC-CE command 400).

[0127] The following describes how a UE can apply the contents of a mobility MAC-CE command to modify its internal RRC configuration. An example of such a MAC-CE command is provided below. Figure 4E This is illustrated (e.g., MAC-CE command 400). The MAC-CE command provides the scrambling identifier field common to all subsequent CSI-RS indices. For CSI-RS index 1, the UE applies the fields given for CSI-RS index 1 as follows:

[0128] Scrambling Identifier – The UE updates its scrambling identifier field to 57.

[0129] Frequency resource reconfiguration (FRR) – The UE uses the information given in the line that matches FRR=0, i.e., reference... Figure 4CIn the FDD index, the StartingRB field is 10 and the RS bandwidth field is 24. Update the frequency configuration of its CSI-RS index 1.

[0130] Time resource reconfiguration (TRR) – The UE uses the information given in the line matching TRR=2, i.e., reference... Figure 4D In the TDD index, the firstOFDMSymbolinTimeDomain field is 0, slotPeriodicity is 5, and slotOffset is 0. Update the timing configuration of its CSI-RS index 1.

[0131] A similar process applies to CSI-RS indexes 2 412b, 3 412c, and 4 412d. Once the information in the mobility MAC-CE command (e.g., MAC-CE command 400) has been applied to the UE, the UE now uses it to detect and measure MBM-RS transmitted by neighboring cells because the CSI-RS reconfiguration changes the scrambling identifier used by the CSI-RS. In practice, this means the UE no longer tracks the reference signal transmitted by the serving cell, but rather the reference signal transmitted by neighboring cells.

[0132] The above embodiments constitute a simplified resource allocation method. As part of the inter-cell mobility process, reference signals are typically reconfigured using RRC reconfiguration during handover. However, the reference signal configurations between different base stations in the serving cell or neighboring cells often do not differ significantly in content. This makes it possible to use the disclosed reconfiguration mechanism. In some embodiments, the time and frequency resources used by the reference signals can be derived using predefined table values.

[0133] The use of reconfiguration according to embodiments of the present invention enables the use of tables with predefined values ​​for time and / or frequency configurations, thereby allowing the UE to quickly update its internal MBM-RS configuration. The reduced flexibility resulting from providing frequency and time domain configuration information associated with the predefined reconfiguration index allows for low-overhead mobility commands. The lower overhead requirement allows the network to initiate such commands directly at the physical and / or MAC layers, thereby reducing latency.

[0134] The following examples provide detailed examples of UE resource reconfiguration based on event-based reporting for mobility beam management.

[0135] The UE is configured with MBM-RS configuration information, enabling it to report measurement information to the network via the serving cell or neighboring cells based on the results of specific events. An example of an event could be a first beam whose signal strength is higher than that of a second beam by a certain threshold amount for a defined duration. MBM-RS configuration information can be a combination of information provided to the UE in lower-layer signaling such as L1 and / or L2 signaling (i.e., L1 and / or L2 messages) and higher-layer signaling such as L3 signaling (i.e., L1 and / or L2 messages). L1 and / or L2 signaling (i.e., L1 and / or L2 messages) can be used to provide UE MBM-RS configuration information that may change more frequently, while L3 messages can be used to provide UE MBM-RS configuration information that may change less frequently. Examples of information that can be provided using L1 and / or L2 signaling (i.e., L1 and / or L2 messages) include configuration information defining reference signal resources to be monitored by the UE. Examples of information that can be provided using L3 signaling (i.e., L1 and / or L2 messages) include the specific type, threshold, and duration of the signal to be measured.

[0136] Events may occur when a UE moves from the coverage area of ​​the serving cell to the coverage area of ​​a neighboring cell. (See also: Regarding...) Figure 1E As described, the serving cell and neighboring cells can have multiple beams, and the UE's path can allow the UE to approach the beams of different cells.

[0137] Now, we will refer to the specific details. Figure 1E In the described embodiment, UE 97 is configured with MBM-RS configuration information that defines four MBM-RS used by serving gNB 91 (on beams 90a, 90b, 90c, and 90d) and four MBM-RS used by adjacent gNB 96 (on beams 95a, 95b, 95c, and 95d).

[0138] Figure 5A This is an example of MBM-RS configuration information for serving gNB 91 from MBM-RS#1 to MBM-RS#4 (on beams 90a, 90b, 90c, and 90d) and MBM-RS configuration information for adjacent gNB 96 from MBM-RS#1 to MBM-RS#4 (on beams 95a, 95b, 95c, and 95d). Figure 5A The content is similar to Figure 4B and Figure 4G The MBM-RS configuration information was found, but not... Figure 4G The period and offset information were found, and they have different values ​​in the frequency band information.

[0139] When UE 97 along Figure 1EWhen UE 97 travels along path 93 and is located at position 98 indicated by an asterisk in the diagram, it is positioned close to beam 90c of serving gNB 91 and beam 95b of adjacent gNB 96. Therefore, an event can correspond to measuring the strength of these two beams, and if the difference between the strength of the reference signal on beam 95b and the strength of the reference signal on beam 90c exceeds a threshold for a period of time, the event is reported to the network.

[0140] For example, the MBM-RS configuration information hierarchy used to define events and the resources involved (similar to...) Figure 4B An example of the MBM-RS configuration information hierarchy described in [the document] is as follows: Figure 5B As shown. This event occurs in Figure 5B In Level 3, it is defined as "MBM1". The first reference resource signal (Resource 1) is defined using the reference signal resource ID (CSI-RS-ResourceID=2) and scrambling identifier (scramblingId=57). This information corresponds to Figure 5A The MBM-RS configuration information 520 for RS#2 is identified in the middle. The second reference resource signal (resource 2) is defined using the reference signal resource ID (CSI-RS-ResourceID=3) and scrambling identifier (scramblingId=9). This information corresponds to Figure 5A The MBM-RS configuration information for RS#3 is shown in section 510. The type of signal to be measured (meas) is identified as reference signal received power (RSRP), the threshold (dB) is indicated as 3dB, and the duration (ms) is indicated as 20 milliseconds. Examples of other measurable signal types (meas quantities) are reference signal received quality (RSRQ) and signal to interference and noise ratio (SINR).

[0141] In some embodiments of the invention, since different beam events become more relevant as the UE moves, the network can update the values ​​of resource1 and resource2 using lower-layer signaling (e.g., L1 / L2 signaling).

[0142] based on Figure 5B The events defined in [the document], UE behavior involves detection and measurement by [the relevant entity]. Figure 5A The MBM-RS configuration information 510 defines RS#3 and is composed of Figure 5AThe MBM-RS configuration information 520 defines RS#2, and if event MBM1 is triggered, i.e. if the RSRP of resource 1 (using RS#2 with scramblingId=57) is 3dB higher than the RSRP of resource 2 (using RS#3 with scramblingId=9) for a duration of 20ms, a report is sent to the network through the serving cell or neighboring cell.

[0143] While the example above describes a specific situation where the RSRP of the MBM-RS on the first resource is greater than the RSRP of the MBM-RS on the second resource by a certain threshold for a specific duration, this is not the only possible event. Other embodiments that can provide the UE with MBM-RS configuration information and corresponding events that can be monitored and reported include, for example, the MBM-RS on the first resource being greater than a threshold T for a duration D, the MBM-RS on the first resource on the first antenna panel P1 being stronger than the MBM-RS on the second resource on the first antenna panel P1 by a certain threshold T for a duration D, and the MBM-RS on the first resource on the first antenna panel P1 being stronger than the MBM-RS on the second resource on the second antenna panel P2 by a certain threshold T for a duration D.

[0144] Refer again Figure 5B The event shown, where the UE does not report RS#2 as superior to RS#3, occurs when, at position 98 (i.e., the event is not triggered) and the UE is still served by serving gNB 91, the network sends a MAC-CE command through the serving cell or a neighboring cell, for example... Figure 5C The MAC-CE command 550 described herein is used to update the MBM event to a new event as the UE continues along path 93. For example, when the UE is at path 97... Figure 1E When the position is shown, the UE is close to the beam 90d of serving gNB 91 and the beam 95c of adjacent gNB 96.

[0145] MAC-CE command, i.e. Figure 5C The MAC-CE command 550 described herein updates the resource1 and resource2 fields. In some embodiments, this may involve using fields that identify the RS index and the scrambling identifier, consisting of multiple bits.

[0146] Figure 5CAn example of the format of MAC-CE command 550 is shown. MAC-CE command 550 includes field 555 for identifying the reference signal configuration index (labeled CSI-report ConfigID), which in this example is indicated as equal to 1. The identifier for the event identifier (labeled EventId) is indicated as event-MBM1 in field 560. Fields 565 and 570 are configuration examples for defining the reference signal index (CSI-RS index) and scrambling identity of the specific beam involved in the event.

[0147] Figure 5D This shows another example of defining an event and the resources involved, which is similar to... Figure 5B Similar, but Figure 5D Involving such as Figure 5A The MBM-RS configuration information 524 defines resource1 as RS#3, and as per [the definition / description]... Figure 5A In the MBM-RS configuration information 515, resource2 is RS#4. In some embodiments, the type of the measured signal (in...) Figure 5D Marked as measQuantity), threshold (in Figure 5D The values ​​are marked as threshold-dB and duration (in...) Figure 5D The MBM-RS configuration information marked as duration-ms is not updated dynamically or semi-statically, but rather updated using L3 signaling (i.e., L3 messages).

[0148] When a MAC-CE command is received, that is Figure 5C When using the MAC-CE command 550 as described in the document, such as Figure 5D As shown, the MBM-RS configuration information corresponding to "event-MBM1" is updated in the UE, and... Figure 5A In this context, resource1 and resource2 correspond to reference signal information 525 for RS#3 and reference signal information 515 for RS#4, respectively.

[0149] Upon receiving the MAC-CE command, i.e. Figure 5C Following the MAC-CE command 550 described herein, the UE behavior involves detecting and measuring RS#4 on beam 90d and RS#3 on beam 95c, and sending a report to the network if event MBM1 is triggered, i.e., if the RSRP of resource 1 (RS#4 using scramblingId=9) is 3dB higher than the RSRP of resource 2 (RS#3 using scramblingId=57) for a duration of 20ms.

[0150] In some embodiments, if the UE is configured with MBM-RS configuration information defining mobility beam-based events, it can be assumed that the UE is performing "monitoring mobility beam events". Monitoring mobility beam events includes the UE monitoring the MBM-RS in the sense that the UE is attempting to detect and measure the reference signal. Similarly, if the UE is configured with mobility beam-based events, the UE monitors the mobility beam-based events in the sense that it is attempting to detect and measure the MBM-RS indicated by the mobility beam-based events, based on thresholds and criteria defined in the mobility beam-based events.

[0151] Figure 5E This is an exemplary signaling diagram 580 illustrating the exchange of signaling (i.e., messages) between network (NW) 581 and one of one or more UEs 583 served by network 581, and the actions taken in response to receiving messages from network 581. Network 581 includes a serving cell serving one or more UEs including UE 583 and at least one neighboring cell of the serving cell. The serving cell may send higher-layer signaling and lower-layer signaling (i.e., higher-layer messages and lower-layer messages) to the UE. Both the serving cell and the neighboring cell may send mobility beam management reference signals to UE 583.

[0152] Network 581 transmits (i.e., transmits) (585) higher-layer signaling (i.e., higher-layer messages) to UE 583 via the serving cell and / or neighboring cells, such as RRC signaling (i.e., RRC messages) with MBM-RS configuration information for UE 583. The higher-layer signaling (i.e., higher-layer messages) may be Layer 3 signaling (i.e., Layer 3 messages). Network 581 also transmits (587) lower-layer signaling (i.e., lower-layer messages) in the form of L1 signaling (i.e., L1 messages) or L2 signaling (i.e., L2 messages) to UE 583 via the serving cell and / or neighboring cells, such as MAC-CE commands. Figure 5CThe MAC-CE command 550 described herein includes additional configuration information in the form of MBM event configuration information. UE 583 may send a MAC-CE command acknowledgment (not shown) to network 581 to indicate that UE 583 has successfully received the MAC-CE command. UE 583 updates (590) the MBM-RS event configuration based on the information in the received MAC-CE command and monitors MBM-RS that can be received from the network by the serving cell and neighboring cells identified in the MBM event configuration. Network 581 sends MBM-RS (not shown), which may be at least one of the serving cell sending the MBM-RS and the neighboring cell sending the MBM-RS. Based on the MBM event configuration information, UE 583 detects and measures the MBM-RS sent by network 581 (not shown). If, for example, a condition of the MBM event defined in the MBM event configuration information is triggered, i.e., the monitored measurement type exceeds a threshold for a specific duration, UE 583 sends (595) an MBM report to the network.

[0153] The following embodiments relate to semi-static beam set indication and ordering for mobility beam management, and provide detailed examples of resource configuration involving semi-static beam set indication and ordering of UE.

[0154] The configuration information is provided to the UE, enabling the UE to update the reference signal information in a semi-static manner and provide beam set information including weight values, so that the UE can determine the importance of the reference signal and thus determine which reference signal can be detected.

[0155] This embodiment will again be referenced in detail. Figure 1E The following example illustrates the arrangement, in which the UE is configured with four MBM-RSs (on beams 90a, 90b, 90c, and 90d) used by the serving gNB 91 and four MBM-RSs (on beams 95a, 95b, 95c, and 95d) used by the adjacent gNB 96.

[0156] Figure 5A The MBM-RS configuration information shown here is also used as an example of the configuration information for MBM-RS#1 to MBM-RS#4 (on beams 90a, 90b, 90c and 90d) serving gNB 91 and the configuration information for MBM-RS#1 to MBM-RS#4 (on beams 95a, 95b, 95c and 95d) of adjacent gNB 96.

[0157] In this example, UE 97 is located Figure 1EIn the location shown, UE 97 is close to beam 90d of serving gNB 91 and beams 95b and 95c of adjacent gNB 96. The network sends MAC-CE commands for mobility beam management, such as... Figure 6A MAC-CE command 600 and Figure 6B The MAC-CE command 650 in the UE indicates the beam set that the UE expects to perform detection, measurement, and reporting.

[0158] Figure 6A This is an example of the content of MAC-CE command 600. MAC-CE command 600 includes pairs of fields that provide identification of the resource to be monitored. Figure 6A In the example, such as Figure 5A Information 525 identifies that fields 610 and 615 provide the identifier for RS#3 on beam 95c. RS#3 has a reference signal index (labeled as CSI-RS index) of 3 and a scrambling identifier of 57. Figure 5A Information 515 identifies that fields 620 and 625 provide the identifier for RS#4 on beam 90d. RS#4 has a CSI-RS index of 4 and a scrambling identifier of 9. For example... Figure 5A Information 520 identifies that fields 630 and 635 provide the identification of RS#2 on beam 95b, RS#2 has the form of CSI-RS index 2 and has scrambling identification 57.

[0159] Upon receiving the MAC-CE command, i.e. Figure 6A Following the MAC-CE command 600 described herein, the UE performs detection, measurement, and reporting on the indicated beam set. The described example is based on the content of the MAC-CE command, namely... Figure 6A As described in MAC-CE command 600, UE 97 expects to detect, measure, and report beam quality using RS#3 with scramblingId=57, RS#4 with scramblingId=9, and RS#2 with scramblingId=57.

[0160] In some embodiments, when identifying a specific set of reference signals, the UE does not expect to detect, measure, or report the beam quality of other reference signals that are not in the indicated beam set of the MAC-CE command.

[0161] In some embodiments, the reference signals in the beam set are ordered in a specific order indicating priority. An example could involve fields in a MAC-CE command arranged in descending order of priority. Figure 6AIn the example of beamsets in MAC-CE command 600, the descending priority occurs in the field pairs arranged from right to left. However, it should be understood that this arrangement can be any preferred arrangement known to both the network and the UE.

[0162] Priority rules can be based on the priority of parameters, where the parameters can be one or more of RSRP, likelihood ratio, RS conditional probability, RS weight, RS period, reporting period, RS frequency position, RS index, and RS position in the indicated beam set.

[0163] There are several ways to identify reference signal detection events. Several examples are described below.

[0164] The first example involves applying an RSRP threshold, specifically a detection event occurs when the detected RSRP is greater than the RSRP threshold.

[0165] The second example involves applying a likelihood ratio threshold, specifically when, for example, considering two reference signals RS#3 and RS#4, a detection event occurs when the likelihood ratio (P{y|x=RS#3} / P{y|x=RS#4}) is greater than the likelihood ratio threshold.

[0166] The third example involves applying a conditional probability threshold, specifically when, for example, considering a reference signal RS#3 (P{y|x=RS#3}), the conditional probability P{y|x=RS} is greater than the conditional probability (P) threshold, a detection event occurs.

[0167] In some embodiments where semi-static beamset indication can be implemented, the network sends a MAC-CE command that instructs the UE to perform detection, measurement, and reporting on the beamset.

[0168] Figure 6B This is an example of the contents of a MAC-CE command 650 that includes reference signal weighting. For example, the weight values ​​can be in the range of 1 to 4, where 1 is the lowest weight value and 4 is the highest weight value. These weight values ​​are only examples and should be understood to be any desired range of values. Upon receiving the MAC-CE command, i.e. Figure 6B Following the MAC-CE command 650 described herein, the UE performs detection, measurement, and reporting on the indicated beam set.

[0169] exist Figure 6B In the example of MAC-CE command 650 described in [the document], a set of three fields provides the identifier of the resource to be monitored and the weight value of that set. Fields 655, 660, and 665 provide [the following information]. Figure 1E The example shows the identifier for RS#1 on beam 90a, which has the form CSI-RS index = 1, scrambling identifier = 9, and weight value = 1. Field set 670 provides... Figure 1E The example shows the identifier for RS#2 on beam 90b, which has the form CSI-RS index = 2, scrambling identifier = 9, and weight value = 2. The next set of three fields provides... Figure 1E The example shows the identifier for RS#3 on beam 90c, which has the form CSI-RS index = 3, scrambling identifier = 9, and weight value = 3. The next set of three fields provides... Figure 1E The example shows the identifier for RS#4 on beam 90d, which has the form CSI-RS index = 4, scrambling identifier = 9, and weight value = 4. The next set of three fields provides... Figure 1E The example shows the identifier for RS#1 on beam 95a, which has the form CSI-RS index = 1, scrambling identifier = 57, and weight value = 1. The next set of three fields provides... Figure 1D The example shows the identifier for RS#2 on beam 95b, which has the form CSI-RS index = 2, scrambling identifier = 57, and weight value = 3. The next set of three fields provides... Figure 1E The example shows the identifier for RS#3 on beam 95c, which has the form CSI-RS index = 3, scrambling identifier = 57, and weight value = 4. The next set of three fields provides... Figure 1D The example shows the identification of RS#4 on beam 95d, RS#4 has the form of CSI-RS index = 4, scrambling identifier = 57 and weight value = 2.

[0170] The following are three different examples illustrating how... Figure 1E The UE 97 shown is located Figure 6B The weights shown represent specific cases of UE behavior for three different types of MBM events.

[0171] In the first example, the weight of an MBM event is calculated as the sum of the CSI-RS weights of the reference signals involved in the event. The MBM events involving RS#3 (scramblingId = 57) and RS#4 (scramblingId = 9) have a combined CSI-RS weight of 8, because each of these corresponding reference signals has a CSI-RS weight of 4. The MBM events involving RS#2 (scramblingId = 9) and RS#2 (scramblingId = 57) have a combined CSI-RS weight of 5, because the weights of these reference signals are 2 and 3, respectively. The event with the highest weight is considered the most important event at that time, until the event information is updated again.

[0172] In the second example, different MBM events are ordered based on their CSI-RS weights. The UE expects to monitor events with CSI-RS weights higher than a specific CSI-RS weight threshold (e.g., 6). Figure 1E At a specific location in UE 97, the UE expects to detect, measure, and report beam quality using RS#3 with scramblingId=57, RS#4 with scramblingId=9, and RS#2 with scramblingId=57. At this specific location, the combined CSI-RS weight of RS#3 with scramblingId=57 and RS#4 with scramblingId=9 is 6, and the combined weight of RS#4 with scramblingId=9 and RS#2 with scramblingId=57 is also 6.

[0173] In the third example, for each value w of the CSI-RS weight of the reference signal, the UE adds w–1dB to the corresponding measurement of that reference signal. This causes the UE to add a positive offset, indicated by the network, to the measurement of the corresponding reference signal, thus giving the reference signal an advantage over other reference signals.

[0174] Figure 6C It is the network ( Figure 6C An exemplary signaling diagram 680 illustrates the exchange of messages between UE 681 (indicated by NW) and one of one or more UEs 683 served by network 681, and the actions taken in response to receiving messages from network 681. Network 681 includes a serving cell serving one or more UEs including UE 683 and at least one neighboring cell of the serving cell. The serving cell may send higher-layer signaling and lower-layer signaling (i.e., higher-layer messages and lower-layer messages) to the UE. Both the serving cell and the neighboring cell may send mobility beam management reference signals to UE 683.

[0175] Network 681 sends (685) higher-layer signaling (i.e., higher-layer messages) to UE 683, such as RRC signaling (i.e., RRC messages) with MBM-RS configuration information for UE 683. The higher-layer signaling (i.e., higher-layer messages) can be Layer 3 signaling (i.e., Layer 3 messages). Network 681 sends (687) lower-layer signaling (i.e., lower-layer messages) to UE 683 in the form of Layer 1 signaling (i.e., L1 messages) or Layer 2 signaling (i.e., L2 messages), such as MAC-CE commands, i.e. Figure 6A The MAC-CE command 600 or described in [the document] Figure 6B 650 in the document includes additional configuration information in the form of MBM resource configuration information. UE 683 can send a MAC-CE acknowledgment (not shown) to network 681 to indicate that UE 683 has successfully received the MAC-CE command. Figure 6AThe MAC-CE command 600 or described in [the document] Figure 6B In 650, network 681 sends (695) MBM-RS, which can be at least one of the serving cell that sent the MBM-RS and the neighboring cell that sent the MBM-RS. Based on event configuration information, UE 683 detects and measures (697) the MBM-RS sent by network 681.

[0176] Another aspect of the invention relates to L1 / L2-based UL resource reconfiguration for reporting mobility beam management, including the configuration of UL resources used by the UE to report information related to mobility beam management, specifically beam reference signal reporting.

[0177] After the UE completes initial network access, it obtains the default UL PUCCH resource for sending MBM-RS-based reports. In some embodiments, the information defining the UL PUCCH can be obtained through system information, such as the master information block (MIB). Figure 7A The image shows an example of a configuration information element (IE), which can be... Figure 1E As part of the MIB broadcast via the gNB 91 service, it is used to provide information to the UE and is marked as PUCCH-ConfigMBM. In this invention, the name PUCCH-ConfigMBM is used as an identifier for the described configuration type, but it should be understood that this name is not intended to limit the expected scope of the configuration information. As part of the MIB and Figure 7A The configuration shown in the image has the same characteristics as described above (e.g., Figure 4B (The same layered structure as other IEs) Figure 7A The configuration IE shown includes the following information: PUCCH ResourceSet Zero, PUCCH ResourceZero, PUCCH-PowerControl, and PUCCH-Format fields.

[0178] PUCCH Resource Set Zero specifies the default UL resource set used for PUCCH transmissions carrying mobility beam management reports. This default PUCCH resource set is indicated to the UE as part of system information (e.g., MIB), and the range of values ​​for PUCCH Resource Set Zero is known to the UE. In this example, the PUCCH Resource Set Zero field is set to 0. This value 0 is an index value corresponding to one or more specific parameters associated with PUCCH Resource Set Zero. PUCCH Resource Set Zero also specifies the default UL resource used for PUCCH transmissions within Physical Uplink Resource Set #0 (PURESET#0) for PUCCH transmissions carrying mobility beam management reports. This default PUCCH resource is indicated to the UE as part of system information (e.g., MIB), and the range of values ​​for PUCCH Resource Set Zero is known to the UE. In this example, the PUCCH Resource Set Zero field is set to 0. This value 0 is an index value corresponding to one or more specific parameters associated with PUCCH Resource Set Zero. PUCCH-PowerControl specifies the default UL power control setting used for PUCCH transmissions carrying mobility beam management reports via PUCCH#0. This default PUCCH power control setting is indicated to the UE as part of system information (e.g., MIB), and the range of values ​​for the PUCCH power control is known to the UE. In this example, the PUCCH-PowerControl field is set to 8. This value 8 is an index value corresponding to one or more specific parameters associated with the PUCCH power control. PUCCH-Format specifies the default PUCCH format used for PUCCH transmissions carrying mobility beam management reports via PUCCH#0. This default PUCCH format setting is indicated to the UE as part of system information (e.g., MIB), and the range of values ​​for the PUCCH format is known to the UE. In this example, the PUCCH-Format field is set to 4. This value 4 is an index value corresponding to one or more specific parameters associated with the PUCCH format. Figure 7A The specific values ​​in the fields of MAC-CE are not intended to be restrictive, but rather to indicate that these fields may include values ​​related to the configuration information provided in the MAC-CE command.

[0179] After receiving the UL resource report configuration information and performing the detection and measurement functions to generate the report information, the UE behavior involves the UE sending an MBM-RS-based report via PUCCH#0 using the parameters given in the configuration information element or message.

[0180] In some implementations, the default UL PUCCH resource, identified as PUCCH#0, can be monitored by each cell (i.e., the serving cell or neighboring cell) to obtain MBM-RS-based reports from the UE serving the cell or the UE serving the neighboring cell.

[0181] The UE can monitor the MIBs in one or more neighboring cells and store information about different neighboring cells indicated in PUCCH-ConfigMBM.

[0182] Figure 7B The image shows another example of configuring IE, which can be... Figure 1E Part of the MIB broadcast by the adjacent gNB 96, used to provide information to the UE, is also marked as PUCCH-ConfigMBM. Figure 7B Including with Figure 7B Same information, but the values ​​of the corresponding parameters are different. Figure 7A The values ​​differ because the values ​​of these parameters reflect information broadcast by neighboring gNB 96.

[0183] Figure 7C An example of the PUCCH#0 bandwidth allocated to the UE for reporting information related to mobility beam management in the frequency domain is shown. In the frequency domain representation, PUCCH#0 705 is allocated to Figure 1E Service gNB 91, PUCCH#0 707 was assigned to Figure 1E The adjacent gNB 96 in.

[0184] Refer again Figure 1E The serving gNB 91 sends an inter-cell mobility MAC-CE command to the UE 97, containing updated PUCCH#0 configuration information for sending MBM-RS-based reports. An example of MAC-CE command format 700 sent to the UE 97 is shown below. Figure 7DAs shown. MAC-CE command 700 contains information about the scrambling identity, PUCCH resource set #0 (PUCCHResourceSetZero), PUCCH resource #0 (PUCCHResourceSetZero), PUCCH power control, and PUCCH format. The scrambling identity is identified in MAC-CE command 700 by the Scrambling Identity field 710. PUCCH resource set zero (PURESET#0 or PUCCHResourceSetZero) specifies the default UL resource set used for PUCCH transmissions carrying mobility beam management reports. This default PUCCH resource set is indicated to the UE as part of system information (e.g., MIB), and the range of values ​​for PUCCH resource set zero is known to the UE. PUCCH resource set #0 is identified in MAC-CE command 700 by the PUCCHResourceSetZero field 715. The PUCCHResourceSetZero field 715... Figure 7D The value is set to 3. This value 3 is an index value corresponding to one or more specific parameters associated with PUCCH resource set zero. PUCCH resource zero (PUCCH#0 or PUCCHResourceZero) specifies the default UL resource for PUCCH transmission within PURESET#0 for PUCCH transmission carrying mobility beam management reports. This default PUCCH resource is indicated to the UE as part of system information (e.g., MIB), and the range of values ​​for PUCCH resource zero is known to the UE. PUCCH resource #0 is identified by the PUCCHResourceZero field 720 in MAC-CE command 700. The PUCCHResourceZero field 720 in Figure 7D The value is set to 32. This value 32 is an index value corresponding to one or more specific parameters associated with PUCCH resource zero. PUCCH power control specifies the default UL power control setting used for PUCCH transmissions carrying mobility beam management reports via PUCCH#0. This default PUCCH power control setting is indicated to the UE as part of system information (e.g., MIB), and the range of values ​​for PUCCH power control is known to the UE. PUCCH power control is identified by the PUCCHPowerControl field 725 in MAC-CE command 700. The PUCCHPowerControl field 725 is... Figure 7DThe value is set to 8. This value 8 is an index value corresponding to one or more specific parameters associated with PUCCH power control. The PUCCH format specifies the default PUCCH format used for PUCCH transmission carrying mobility beam management reports via PUCCH#0. This default PUCCH format setting is indicated to the UE as part of system information (e.g., MIB), and the range of values ​​for the PUCCH format is known to the UE. The PUCCH format is identified by the PUCCH-Format field 730 in MAC-CE command 700. The PUCCH-Format field 730 is in Figure 7D The value is set to 4. This value 4 is the index value corresponding to one or more specific parameters associated with the PUCCH format. Specific values ​​in the fields of MAC-CE 700 are not intended to be restrictive, but rather to indicate that these fields may include values ​​related to configuration information provided in MAC-CE commands. Figure 7D This is a specific example of a MAC-CE command, but other examples of MAC-CE commands may include additional fields. Figure 7D The fields shown are arranged in different orders, and there are multiple instances of the same field.

[0185] In some embodiments, such as the parameter sets included in MAC-CE command 700, each parameter set has specific values ​​that can be expressed by corresponding index values. This enables the reconfiguration of UL resources compressed using a tabular scheme. Figure 7E An example of this scenario is shown below. A UL resource reconfiguration index value between 0 and 63 is associated with each parameter set. Therefore, in this example, a discrete set of parameters can be provided to the UE based on a 6-bit index value. Figure 7E The parameters in the table correspond to Figure 7D The parameters in the MAC-CE command 750, and in Figure 7E The table now includes a PUCCH-NrOfSlots parameter, which specifies the number of slots for sending the same PUCCH transmission.

[0186] exist Figure 7E In the example, a specific UL resource reconfiguration index can be provided to the UE, and parameter fields can be updated based on parameter values ​​associated with the UL resource reconfiguration index value.

[0187] Figure 7F On the network ( Figure 7FAn exemplary signaling diagram 750 illustrates the exchange of signaling (i.e., messages) between network 751 (NW) 751 and one of one or more UEs 753 served by network 751, as well as actions in response to receiving signaling (i.e., messages) from network 751. Network 751 includes a serving cell serving one or more UEs including UE 753, and includes at least one neighboring cell of the serving cell. The serving cell may send higher-layer signaling and lower-layer signaling (i.e., higher-layer messages and lower-layer messages) to UE 753. Both the serving cell and the neighboring cell may send mobility beam management reference signals to UE 753.

[0188] Network 751 sends (i.e., transmits) (755) higher-layer signaling (i.e., higher-layer messages) to UE 753, such as RRC signaling (i.e., RRC messages) with MBM-RS configuration information for UE 753. The higher-layer signaling (i.e., higher-layer messages) may be Layer 3 signaling (i.e., Layer 3 messages). Network 751 sends (760) lower-layer signaling (i.e., lower-layer messages) in the form of L1 signaling (i.e., L1 messages) or L2 signaling (i.e., L2 messages) to UE 753, such as a MAC-CE command (i.e., MAC-CE command 700), which includes additional configuration information in the form of MBM-RS uplink resource report configuration information. UE 753 may send (not shown) a MAC-CE acknowledgment to network 751 to indicate that UE 753 has successfully received the MAC-CE command (i.e., MAC-CE command 700). UE 753 updates (765) the MBM uplink resource report configuration based on the information in the MAC-CE command. Network 751 sends an MBM-RS (not shown), which can be at least one of the serving cell that sent the MBM-RS and the neighboring cell that sent the MBM-RS. Based on event configuration information, UE 753 detects and measures the MBM-RS sent by network 751. UE 753 sends an (770) MBM report to the network on uplink resources.

[0189] Another embodiment of the present invention includes a beam reference signal information report based on aperiodic / semi-static signals.

[0190] Refer again Figure 1ETo illustrate this embodiment, UE 97 is connected to serving gNB 91 and moves along path 93. It is assumed that UE 97 is configured with knowledge of RS#1 to RS#4 from serving gNB 91 and RS#1 to RS#4 from neighboring gNB 96. Specifically, in this embodiment, the mobility beam management reference signal (MBM-RS) is a radio resource management reference signal (RRM-RS) instead of a beam management reference signal (BM-RS).

[0191] As UE 97 travels along path 93, it enters the coverage area of ​​different beams transmitted by different gNBs 91 and 96. Depending on UE 97's location at a given time, the network can request UE 97 to transmit an aperiodic / semi-static measurement report based on a specific mobility beam.

[0192] The network transmits an aperiodic / semi-static MBM report request directly in DCI format via one of the gNBs in the physical downlink control channel (PDCCH). The UE then detects and measures the indicated MBM-RS and sends an MBM report to the network.

[0193] In this embodiment of mobility management, the network-side behavior involves the network sending a PDCCH transmission in DCI format via one of the gNBs, with an aperiodic / semi-static MBM reporting request, to indicate that the MBM-RS will be monitored for reporting.

[0194] UE behavior involves detecting and measuring the MBM-RS based on the MBM-RS indicated in the received DCI, and sending the MBM report back to the network through one of the gNBs.

[0195] Figure 8 On the network ( Figure 8 An exemplary signaling diagram 800 illustrates the exchange of signaling (i.e., messages) between NW) 801 and one of one or more UEs served by network 801, UE 803, and the actions taken in response to receiving messages from network 801. Network 801 includes multiple cells. (See reference...) Figure 1EAs described, from the perspective of a given UE, there exists a serving cell that serves the UE and other cells adjacent to the serving cell, which are considered to be neighboring cells of the serving cell. The serving cell can send higher-layer signaling and lower-layer signaling (i.e., higher-layer messages and lower-layer messages) to the UE. Both the serving cell and neighboring cells can send mobility beam management reference signals to the UE.

[0196] Network 801 sends (805) higher-layer signaling (i.e., higher-layer messages) to UE 803, such as RRC signaling (i.e., RRC messages) with RRM-RS configuration information for the UE. The higher-layer signaling (i.e., higher-layer messages) may be Layer 3 signaling (i.e., Layer 3 messages). Network 801 sends (810) a PDCCH message with an aperiodic MBM report request in the DCI. Here, network 801 may be one or both of the serving cell and neighboring cells. Network 801 sends (815) MBM-RS transmission to UE 803. UE 803 detects and measures (820) the MBM-RS transmission sent by network 801 based on the content of the MBM-RS information in the PDCCH. UE 801 sends (825) the MBM report back to the network through a designated channel, which may include PUCCH or PUSCH.

[0197] The above-described embodiments regarding non-periodic / semi-static reporting based on RRM-RS enable efficient mobility management because the network informs the UE of the specific RRM-RS that the network wants the UE to measure and report.

[0198] The above-described embodiments regarding aperiodic / semi-static reporting based on RRM-RS can reduce the complexity of UE behavior. For example, the UE can detect and measure only the RRM-RS indicated in the aperiodic / semi-static reporting request, without consuming processing power to detect or measure RRM-RS not indicated in the aperiodic / semi-static reporting request.

[0199] The following paragraphs include a description of examples of beam-based mobility procedures that apply some of the embodiments described above in combination, such as using mobility beam events, UL reporting of mobility beam events via the default UL physical channel, and DL MBM reference signal reconfiguration.

[0200] When describing an example of the mobility beam management process, refer again to Figure 1E .like Figure 1E As clearly shown, UE 97 travels along path 93 and is located within the coverage area of ​​beam 90d of transmit RS#4 of serving gNB 91 and beam 95c of transmit RS#3 of adjacent gNB 96.

[0201] UE configuration as follows Figure 5AThe MBM-RS list defined in the MBM-RS configuration information shown.

[0202] The UE is also configured with a mobility beam reporting event configuration. In some embodiments of this implementation, the initial configuration of the mobility beam reporting event may not include information about the beams involved in the mobility beam event (i.e., Figure 5B (resource1 and resource2 are identified in the code). Therefore, the configuration of mobility beam reporting events is related to... Figure 5B Similar, but not including Figure 5B The CSI-RS-ResourceID or scramblingID information for resource1 or resource2 is shown.

[0203] When UE 97 reaches the coverage area of ​​beam 90d (transmitting RS#4) of serving cell gNB 91 and beam 95c (transmitting RS#3) of neighboring gNB 96, the network sends low-layer signaling (i.e., low-layer-based messages) to UE 97 through serving gNB 91 to instruct UE 97 which mobility beam-based events it will track, which UL configurations it will use for MBM reporting, and how to update its MBM-RS configuration. An example of low-layer signaling (i.e., low-layer-based messages) is L2-based signaling (i.e., L2-based messages). This low-layer signaling (i.e., low-layer message) can be a MAC-CE command. Such a MAC-CE command can include signals from... Figure 5C , Figure 6A and Figure 7D Information on MAC-CE commands 550, 600, and 700.

[0204] Example of MAC-CE command format 900 Figure 9A As shown. MAC-CE command 900 contains information defining the reference signal report configuration 905 (CSI-report ConfigId). This command defines the parameters required for configuring the event, specifically defining the reference signal for a specific beam using the corresponding reference signal index and scrambling identifier, as well as PUCCH resource information and information on the scrambling identifier of the reference signal used to reconfigure the specific beam.

[0205] MAC-CE command format 900 enables the reconfiguration of mobility beam-based events with event identifier (EventId) "event-MBM1" 910, so that resource1 uses RS#3 and resource2 uses RS#4.

[0206] The reference signal index (CSI-RS index) field and scrambling identity field that jointly define resource1 are marked as 915, and the reference signal index field and scrambling identity field that jointly define resource2 are marked as 920.

[0207] PUCCH configuration information is contained in fields labeled 930a and 930b. Field 930a includes the PUCCH Resource Set #0 (PUCCHResourceSetZero) field and the PUCCH Resource #0 (PUCCHResourceZero) field. Field 930b includes the PUCCH Power Control field, the PUCCH Format field, and other fields, such as the number of PUCCH symbols used to define the number of symbols in the PUCCH used for beam management reporting and the number of PUCCH symbols used for beam management reporting (PUCCH-NrofSymbols), and the PUCCH Scrambling Identity (PUCCH-ScramblingIdentity). Figure 7D Not shown in the image.

[0208] One of the reference signal reconfiguration information is in the field marked 935. These fields marked 935 include a Reference Signal Index (CSI-RS Index) field and a Current Scrambling Identity field, which together define the information for reference signal RS#1. Then there is a New Scrambling Identity field, which replaces the current scrambling identity, and a new Time Resource Reconfiguration field. The new Time Resource Reconfiguration field may include, for example, information corresponding to… Figure 4D The table lists the TRR information.

[0209] When the event “event-MBM1” based on mobility beams is triggered, i.e., when the threshold of a detected resource signal exceeds a given threshold of a second resource signal for a given duration, the UE will then send a measurement report of “event-MBM1” on the UL PUCCH transmission configured for the UE based on the parameters indicated for the PUCCH transmission (e.g., PUCCHResourceSetZero, PUCCHResourceZero, PUCCH-PowerControl, PUCCH-Format, PUCCH-NrofSymbols, PUCCH-ScramblingIdentity).

[0210] Furthermore, by using scrambling code identifier value 74 (corresponding to different adjacent base stations) instead of scrambling code identifier value 9, the current RS#1 configured for the UE is reconfigured to a new RS#1, and follows... Figure 4D The timing configuration given in the row with value 2 is (i.e., firstOFDMSymbolInTimeDomain equals 0, the time slot period is 5 time slots, and the time slot offset is 0).

[0211] In this specific example, upon receiving a PDSCH transmission carrying MAC-CE command 900, the UE sends an acknowledgment to the network via the gNB to confirm receipt of the PDSCH, and after a certain delay, the UE applies the MAC-CE command (i.e., MCA-CE command 900). This informs the network when the UE applied MAC-CE command 900. Based on the reconfiguration information in MAC-CE command 900, the reconfigured mobility beam-based event has the following characteristics: Figure 5D The content shown.

[0212] In this example, refer again Figure 1E UE 97 is now used to track events based on mobility beams, where RS#4 of the serving cell gNB 91 is greater than RS#3 of the neighboring gNB 96 because the network predicts that UE 97 will leave the coverage area of ​​the serving gNB 91 and move to the coverage area of ​​the neighboring gNB 96. This prediction can be based on current trajectory information, the location of the gNB in ​​the nearby area, and other information available to the network. Furthermore, the network can collect measurements and reports from different UEs and use statistical methods, such as artificial intelligence, machine learning, and deep learning modules, to perform such predictions. The beams corresponding to RS#1 to RS#3 (beams 90a, 90b, 90c) on the serving gNB 91 and RS#1 and RS#2 (beams 95a and 95b) on the neighboring gNB 96 are irrelevant to the network because the network knows the beam arrangements used by the serving gNB and the neighboring gNB.

[0213] As part of the functionality involved in mobility beam management, the above description of limited examples suggests that UE behavior may include some or all of the following functions:

[0214] (1) The content of the high-level signaling (i.e., high-level messages) received by the UE application from the serving gNB carrying high-level configuration information (e.g., MBM-RS configuration), such as the content of RRC signaling (i.e., RRC messages);

[0215] (2) The UE performs MBM measurement on a reference signal that is consistent with the configured MBM-RS;

[0216] (3) The UE receives low-layer signaling (i.e., low-layer messages) on the PDSCH, such as the MAC-CE command for mobility beam management, which carries MBM-RS resource reconfiguration, MBM event reconfiguration and MBM UL PUCCH reconfiguration.

[0217] (4) The UE sends a HARQ-ACK confirmation for the PDSCH carrying low-layer signaling (i.e., low-layer message) for mobility beam management;

[0218] (5) The UE updates its internal MBM-RS configuration based on the information indicated in the lower-layer signaling (i.e., lower-layer message) and begins to track the MBM-RS indicated in the MBM event;

[0219] (6) The UE detects and measures the indicated MBM event, and prepares an MBM report when the MBM event is triggered;

[0220] (7) The UE sends an MBM report to the serving base station via the MBM UL PUCCH resource indicated in the MAC-CE command.

[0221] Figure 9B This is an exemplary signaling diagram 950 illustrating the exchange of messages between a network and one of one or more UEs 953 served by the network, and the actions taken in response to messages received from the network. The network includes a serving base station (serving gNB) 951 serving one or more UEs and at least one neighboring base station (neighboring gNB) 952 of the serving base station 951. The serving base station 951 sends (955) higher-layer signaling (i.e., higher-layer messages), such as RRC signaling (i.e., RRC messages), to the UE 953, which contains Radio Resource Management Reference Signals (RRM-RS) configuration information for the UE 953. The higher-layer signaling (i.e., higher-layer messages) may be Layer 3 signaling (i.e., Layer 3 messages). The serving base station 951 sends (960a) MBM-RS transmission, and the neighboring cell 952 sends (960b) MBM-RS transmission. In step 965, the UE 953 detects and measures the MBM-RS identified in the configuration higher-layer signaling (i.e., higher-layer message 955). Serving base station 951 sends a (970) MAC-CE command in the PDSCH, for example Figure 9AThe MAC-CE command 900 is shown. UE 953 sends (975) an acknowledgment of receiving the PDSCH carrying the MAC-CE command (i.e., MAC-CE command 900). UE 953 updates (980) the UE configuration based on the configuration in the MAC-CE command. Serving base station 951 sends (985a) more MBM-RS transmissions, and neighboring base station 952 also sends (985b) more MBM-RS transmissions. In step 990, UE 953 detects (990) a mobility-based event (as described above in one of various ways) and prepares to send an MBM measurement report via the UL resources configured in the MAC-CE command. UE 953 sends (995) the MBM report back to the network via a designated channel, which may include PUCCH or PUSCH.

[0222] This example illustrates how the embodiments described in this invention can help achieve efficient mobility management because the network can notify the UE of specific mobility beam-based events that the network expects to report from the UE. The network also provides the UE with UL configuration via the base station for use when a mobility beam-based event is triggered, which reduces latency because the UE does not have to send mobility measurements via PUSCH transmission.

[0223] This example illustrates how the embodiments described in this invention help reduce the complexity of UE behavior. The UE only detects and measures the MBM-RS indicated in the mobility beam-based event. No processing power is consumed in detecting or measuring the MBM-RS not indicated in the MAC-CE command. The UL PUCCH resource indicated for MBM reporting enables the UE to directly send mobility measurements when an MBM event is triggered.

[0224] This example illustrates how embodiments described in this invention help address the problem of tracking beam-based mobility events by providing the network with the capability to configure a UE to track beam-based mobility events. Beam-based mobility events can be dynamically reconfigured using MAC-CE commands. Furthermore, this example illustrates functionality that enables a UE to report mobility measurements of such beam-based mobility events without invoking higher-level mechanisms (e.g., scheduling requests).

[0225] The following paragraphs describe another example of a beam-based mobility process that applies some of the embodiments described above when used in combination. This example describes the use of beam set indication and sequencing, as well as UL reporting of mobility beam events, via the default UL physical channel on the MBM BWP.

[0226] Refer again Figure 1EAs clearly shown in the figure, UE 97 is traveling along path 93 and is located within the coverage area of ​​beam 90d of transmit RS#4 of serving gNB 91 and beam 95c of transmit RS#3 of adjacent gNB 96.

[0227] UE configuration as follows Figure 5A The MBM-RS list defined in the MBM-RS configuration information shown.

[0228] The MBM-RS used for monitoring by UE 97 is based on UE 97. Figure 5A The system provides timed configuration for detection and measurement. Besides being used for configuration... Figure 5A In addition to the UE's configuration information, the network provides MBM BWP information to all UEs within the network through the base station as part of the Basic System Information (MIB).

[0229] Figure 10A This is an example of system information presented in the form of an information element (IE) that can be broadcast by the network through the serving cell and neighboring cells. As part of the Mobility Beam Management Configuration (ConfigMBM), the system information includes information that identifies mobility beam resource information as a set of parameters and is identified by associated index values. Figure 10A The identifier is MobilityBeamResourceSet, also referred to herein as MBRESET. In this invention, the names ConfigMBM and MobilityBeamResourceSet are used as identifiers for the described configuration type; however, it should be understood that these names are not intended to limit the expected scope of the configuration information. This configuration IE has, for example, [missing information - likely related to configuration types]. Figure 7A and Figure 7B It has the same layered structure as the other IEs mentioned above.

[0230] Each MobilityBeamResourceSet (MBRESET) has associated index values ​​for three parameters that define the UL BWP for MBM reporting purposes: the number of resource blocks (RBs), the starting RB, and the number of symbols. MBRESET can be a system-wide parameter, meaning all base stations use the same MBRESET, or a cell-specific parameter, meaning different base stations use their own MBRESET settings and values. For the scope of this example, it is assumed to be the former.

[0231] Figure 10BThis is a sample table containing eight mobile beam resource sets identified by indices 0 through 7. The index value of the MBRESET field points to an entry in the table, which also provides the configuration of time-frequency resources occupied by the MBM BWP, namely the number of RBs, the starting RB, and the number of symbols. See again... Figure 10A Based on system information broadcast by the network, the UE uses a configuration that matches the row with a MBRESET value of 7, i.e., the number of RBs is equal to 48, the starting RB is 132, and the number of symbols is equal to 4.

[0232] based on Figure 1E During at least a portion of the path 93 traversed by UE 97, the network sends low-layer signaling (i.e., low-layer messages), such as L2-based signaling (i.e., L2-based messages), to UE 97 to indicate the MBM-RS-based beamset. The low-layer signaling (i.e., low-layer messages) includes information about the MBM-RS that UE 97 expects to detect and measure, and the corresponding priority of each MBM-RS. The low-layer signaling (i.e., low-layer messages) also includes information about which configurations to use for MBM reporting purposes. This low-layer signaling (i.e., low-layer messages) may be a MAC-CE command.

[0233] Figure 10C This is an example of a MAC-CE command 1000, which includes various fields that can be included in such a MAC-CE command. The MAC-CE command 1000 contains information defining the MBM beam set that the UE expects to detect and measure, specifically defining a specific beam reference signal using a corresponding reference signal index (CSI-RS index), scrambling identity, and reference signal weight value (CSI-RS weight), as well as resource information (PUMBCH-Scrambling Identity, PUMBCH-Power Control, and PUMBCH-Format) that the UE can use to report beam information to the network. In some embodiments, the UE does not expect to detect and measure MBM-RS that are configured by the network using higher-level signaling but are not part of an indicated MBM beam set.

[0234] The MAC-CE command 1000 includes three field sets: 1010, 1015, and 1020. Each information set includes a Reference Signal Index (CSI-RS Index) field, a Scrambling Identity field, and a Reference Signal Weight (CSI-RS Weight) value, which together define the corresponding beam. The weight associated with the MBM-RS is information used by the UE in RS detection. For example, for an MBM-RS assigned a weight n, assuming that the MBM-RS is indeed a transmitted signal (x), the UE applies a threshold of 1 / (n+1) to the conditional probability P{y|x=MBM-RS} of the transmitted / received signal (y).

[0235] The set of three additional fields collectively marked 1025 in MAC-CE 1000 includes resource information that the UE can use to report beaming information to the network. This resource is identified as the Physical Uplink Mobility Beamchannel (PUMBCH), but this designation is used only as a descriptive term. The resource could also be a more typical uplink channel, such as PUCCH or PUSCH. In this example, the three fields 1025 include the PUMBCH-ScramblingIdentity field, used to configure the scrambling identifier of the demodulation reference signal (DMRS) on the PUMBCH; the PUMBCH-Power Control field, used to configure the power on the PUMBCH; and the PUMBCH-Format field, used to configure the format used on the PUMBCH.

[0236] As part of the functionality involved in mobility beam management, the above description of limited examples suggests that UE behavior may include some or all of the following functions:

[0237] (1) The UE application receives RRC signaling (i.e. RRC message) from the network through the base station. The RRC signaling carries higher-layer configuration information such as MBM-RS configuration.

[0238] (2) The UE receives MAC-CE commands (e.g., on the PDSCH used for mobility beam management) Figure 10C The MAC-CE command (1000) carries the MBM beam set, including the MBM-RS index, MBM-RS scrambling identifier, MBM-RS weight, and UL resources for transmitting physical uplink mobility beam channels.

[0239] (3) The UE carries MAC-CE commands for mobility beam management (e.g.) Figure 10CThe MAC-CE command (1000) sends a HARQ-ACK confirmation via PDSCH;

[0240] (4) The UE updates its internal RS detection algorithm and begins to use MAC-CE commands (e.g.) Figure 10C The information indicated in the MAC-CE command 1000 applies the RS detectability rules;

[0241] (5) The UE detects and measures the indicated MBM-RS based on the weight of each MBM-RS in the indicated beam set; and

[0242] (6) The UE sends an MBM report to the serving base station (gNB) via the PUMBCH resource (or other configured UL channel) indicated in the MAC-CE command.

[0243] Figure 10D It is network 1051 ( Figure 8 An exemplary signaling diagram 1050 illustrates the exchange of messages between a UE 1053 (indicated by NW) and one of a plurality of UEs served by network 1051, and the actions taken in response to receiving messages from network 1051. Network 1051 includes a serving base station serving one or more UEs and at least one neighboring base station of that serving base station. Therefore, Figure 10D The network 1051 shown can send signaling to or receive messages from the UE 1053 via a serving base station or a neighboring base station. The network 1051 sends (1055) higher-layer signaling (i.e., higher-layer messages) to the UE 1053, such as RRC signaling (i.e., RRC messages), which contains Radio Resource Management Reference Signals (RRM-RS) configuration information for the UE 1053. The higher-layer signaling (i.e., higher-layer messages) can be Layer 3 signaling (i.e., Layer 3 messages). The network 1051 sends (1060) MAC-CE commands in the PDSCH, for example... Figure 10C The MAC-CE command 1000 is shown. UE 1053 sends (1065) an acknowledgment of receiving the PDSCH carrying the MAC-CE command. UE 1053 updates (1070) the UE configuration based on the configuration in the MAC-CE command. Network 1051 sends (1075) an MBM-RS transmission, which may include the serving base station or one or more neighboring base stations that sent the MBM-RS transmission. In step 1080, UE 1053 detects a mobility-based event (as described above in one of various ways) and prepares to send an MBM measurement report via the UL resources configured in the MAC-CE command. UE 1053 sends (1085) the MBM report back to the network via the serving base station or one or more neighboring base stations through a designated channel (which may include PUCCH or PUSCH).

[0244] Figure 10D The signaling example illustrates how the embodiments described in this invention can help achieve efficient mobility management because the network can notify the UE of events based on a specific mobility beam that the network expects to report from the UE. The network, serving base station, or one or more neighboring base stations also provide the UE with UL configuration for use when a mobility beam-based event is triggered, which reduces latency because the UE does not have to transmit mobility measurements via PUSCH transmission.

[0245] Figure 10D This signaling example illustrates how the embodiments described in this invention help reduce the complexity of UE behavior. The UE only detects and measures MBM-RS indicated in the mobility beamset event. Detecting or measuring MBM-RS not indicated in the MAC-CE command (i.e., MAC-CE command 1000) consumes no processing power. Indicating UL PUMBCH resources for MBM reporting enables the UE to directly send mobility measurements based on MBM-RS in the mobility beamset.

[0246] Figure 10D This signaling example illustrates how embodiments described in this invention can help address the problem of tracking beam-based mobility events by providing the network with a means to configure the UE to detect and measure only a specific set of MBM-RS. These mobility beam sets can be dynamically reconfigured using MAC-CE commands (MAC-CE command 1000). Furthermore, this example provides the UE with a means to report mobility measurements of such beam-based events without invoking higher-level mechanisms (e.g., scheduling requests).

[0247] It should be noted that the above references Figure 10D The described example assumes a cell-independent or cell-transparent design in the signaling flow. The UE is only aware of the reference signal used for mobility beam management, and the reporting of mobility beam measurements is done through a channel that is not specifically targeted at the serving base station.

[0248] It should be understood that one or more steps in the methods of the embodiments provided herein can be performed by corresponding units or modules. For example, a signal can be transmitted by a transmitting unit or transmitting module. A signal can be received by a receiving unit or receiving module. A signal can be processed by a processing unit or processing module. The corresponding units / modules can be hardware, software, or a combination thereof. For example, one or more units / modules can be integrated circuits, such as field-programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs). It should be understood that if these modules are software, they can be retrieved, in whole or in part, by a processor as needed, to be used individually or collectively for processing as needed in one or more instances, and these modules themselves can include instructions for further deployment and instantiation.

[0249] While combinations of features are shown in the illustrated embodiments, it is not necessary to combine all features to achieve the advantages of the various embodiments of the invention. In other words, a system or method designed according to embodiments of the invention does not necessarily include all features shown in any of the figures or all portions schematically illustrated in the figures. Furthermore, selected features of one exemplary embodiment may be combined with selected features of other exemplary embodiments.

[0250] Although the invention has been described with reference to illustrative embodiments, this description is not intended to be construed in a limiting sense. Various modifications and combinations of the illustrative embodiments, as well as other embodiments of the invention, will be apparent to those skilled in the art upon reference to this specification. Therefore, the appended claims are intended to cover any such modifications or embodiments.

Claims

1. A method for performing inter-cell mobility management, characterized in that, include: The user equipment (UE) receives higher-layer signaling from the network, the higher-layer signaling including configuration information of multiple mobility beam management reference signals (MBM-RS) to enable the UE to measure MBM-RS from at least one base station in the network; as well as The UE receives low-layer signaling from the network, the low-layer signaling including additional information related to monitoring mobility beam management (MBM) events; The additional information related to the MBM event includes information about the MBM-RS to be monitored for the MBM event, wherein the MBM-RS is one of the plurality of MBM-RS to which the configuration information is received, and the information includes time-frequency resource information and scrambling identifier.

2. The method according to claim 1, characterized in that, The lower-layer signaling is at least one of layer 1 (L1) signaling and layer 2 (L2) signaling.

3. The method according to claim 2, characterized in that, The lower-level signaling refers to L1 signaling and L2 signaling.

4. The method according to claim 1, characterized in that, The additional information includes an identifier for the MBM event, which is based on the measurement type associated with the MBM event to be monitored, a threshold for the MBM event, and a duration associated with the threshold, when the MBM event is triggered when the duration associated with the threshold is exceeded.

5. The method according to claim 4, characterized in that, The time-frequency resource information identifies one or more of the period, offset, and resource mapping of the MBM-RS.

6. The method according to claim 5, characterized in that, The time-frequency resource information includes at least one of the following: An index value associated with one or more time-domain resource configuration parameters of the MBM-RS; and An index value associated with one or more frequency domain resource configuration parameters of the MBM-RS.

7. The method according to any one of claims 1 to 6, characterized in that, It also includes measuring the MBM-RS to be monitored in response to the MBM event, thereby generating measurement information for the monitored MBM-RS.

8. The method according to claim 7, characterized in that, The additional information includes uplink resource configuration information, which identifies the uplink resources used by the UE to report the measurement information of the monitored MBM-RS.

9. The method according to claim 8, characterized in that, The uplink resource configuration information includes index values ​​associated with one or more uplink resource configuration parameters.

10. The method according to claim 7, characterized in that, Also includes: The UE sends the measurement information of the MBM-RS to the network.

11. The method according to any one of claims 1 to 6, characterized in that, The additional information includes information about the set of the plurality of MBM-RSs, the information including a weight value for each MBM-RS in the set of MBM-RSs, the weight value being used by the UE to determine the order in which the MBM-RSs in the set of MBM-RSs are monitored.

12. The method according to any one of claims 1 to 6, characterized in that, Also includes: After receiving the lower-layer signaling, the UE sends an acknowledgment of receipt of the lower-layer signaling.

13. The method according to any one of claims 1 to 6, characterized in that, The lower-layer signaling includes the Media Access Control-Control Element (MAC-CE).

14. A device, characterized in that, include: processor; as well as One or more computer-readable media having processor-readable instructions stored thereon, which, when executed by the processor, perform the method according to any one of claims 1 to 13.

15. A method for performing inter-cell mobility management, characterized in that, include: The network sends higher-layer signaling to the user equipment (UE), the higher-layer signaling including configuration information for multiple mobility beam management reference signals (MBM-RS) to enable the UE to measure the MBM-RS transmitted by at least one base station in the network; and The network sends low-layer signaling to the UE, the low-layer signaling including additional information related to monitoring mobility beam management (MBM) events; The additional information related to the MBM event includes information about the MBM-RS to be monitored for the MBM event, wherein the MBM-RS is one of the plurality of MBM-RS to which the configuration information is received, and the information includes time-frequency resource information and scrambling identifier.

16. The method according to claim 15, characterized in that, The lower-layer signaling is at least one of layer 1 (L1) signaling and layer 2 (L2) signaling.

17. The method according to claim 16, characterized in that, The lower-level signaling refers to L1 signaling and L2 signaling.

18. The method according to claim 17, characterized in that, The additional information includes an identifier for the MBM event, which is based on the measurement type associated with the MBM event to be monitored, a threshold for the MBM event, and a duration associated with the threshold, when the MBM event is triggered when the duration associated with the threshold is exceeded.

19. The method according to claim 15, characterized in that, The time-frequency resource information identifies one or more of the period, offset, and resource mapping of the MBM-RS.

20. The method according to claim 19, characterized in that, The time-frequency resource information includes at least one of the following: An index value associated with one or more time-domain resource configuration parameters of the MBM-RS; and An index value associated with one or more frequency domain resource configuration parameters of the MBM-RS.

21. The method according to any one of claims 15 to 20, characterized in that, The additional information includes information about the set of the plurality of MBM-RSs, the information including a weight value for each MBM-RS in the set of MBM-RSs, the weight value being used by the UE to determine the order in which the MBM-RSs in the set of MBM-RSs are monitored.

22. The method according to any one of claims 15 to 20, characterized in that, The additional information includes uplink resource configuration information, which identifies the uplink resources used by the UE to report measurement information of the MBM-RS monitored by the UE.

23. The method according to claim 22, characterized in that, The uplink resource configuration information includes index values ​​associated with one or more uplink resource configuration parameters.

24. The method according to any one of claims 15 to 20, characterized in that, Also includes: The network receives measurement information from the UE obtained by the UE from one or more MBM-RS identified in the additional information.

25. The method according to any one of claims 15 to 20, characterized in that, It also includes the network receiving confirmation from the UE that the UE has received the low-layer signaling after sending the low-layer signaling.

26. The method according to any one of claims 15 to 20, characterized in that, The lower-layer signaling includes the Media Access Control-Control Element (MAC-CE).

27. A device, characterized in that, include: processor; as well as One or more computer-readable media having processor-readable instructions stored thereon, which, when executed by the processor, perform the method according to any one of claims 15 to 26.

28. A computer-readable medium, characterized in that, Includes instructions that, when executed by the processor of the device, cause the device to perform the method according to any one of claims 1 to 13.

29. A device, characterized in that, Includes means for performing the method according to any one of claims 1 to 13.

30. A computer-readable medium, characterized in that, Includes instructions that, when executed by the processor of the device, cause the device to perform the method according to any one of claims 15 to 26.

31. A device, characterized in that, Includes means for performing the method according to any one of claims 15 to 26.

Images