WO2022206801A1 - 电子设备、通信方法和存储介质 - Google Patents

电子设备、通信方法和存储介质 Download PDF

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Publication number
WO2022206801A1
WO2022206801A1 PCT/CN2022/083931 CN2022083931W WO2022206801A1 WO 2022206801 A1 WO2022206801 A1 WO 2022206801A1 CN 2022083931 W CN2022083931 W CN 2022083931W WO 2022206801 A1 WO2022206801 A1 WO 2022206801A1
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Prior art keywords
serving cell
cell
reference signal
measurement
electronic device
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English (en)
French (fr)
Inventor
曹建飞
刘敏
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Sony Group Corp
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Sony Group Corp
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Priority to EP22778983.1A priority Critical patent/EP4307594A4/en
Priority to CN202280024257.3A priority patent/CN117063434A/zh
Priority to JP2023560746A priority patent/JP2024512750A/ja
Priority to US18/552,193 priority patent/US20240179590A1/en
Publication of WO2022206801A1 publication Critical patent/WO2022206801A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/085—Reselecting an access point involving beams of access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points

Definitions

  • the present disclosure generally relates to the field of wireless communication, and more particularly, to an electronic device, a communication method and a storage medium for inter-cell mobility management based on layer 1 or layer 2 in a wireless communication system.
  • 5G NR New Radio
  • 5G NR New Radio
  • FR1 FR1 called sub-6 band and FR2 located in the millimeter wave band
  • Beamforming Beamforming
  • narrower directional beams can be formed to combat the large path loss existing in high-frequency channels, and cell coverage can be achieved by deploying multiple beams.
  • intra-cell mobility intra-cell mobility
  • inter-cell mobility inter-cell mobility
  • FIG. 1 simply shows a flow chart of cell handover.
  • the serving cell configures the UE with reference signals (RS) related to mobility of its own cell and neighboring cells using RRC signaling in advance, and the UE performs layer 3 filtering and measurement on these reference signals to obtain a relative average , convergent measurement results, and perform Radio Resource Management (RRM) related reporting after triggering a predetermined Layer 3 event.
  • RS reference signals
  • RRM Radio Resource Management
  • the serving cell makes a handover decision based on the reported content, and sends a handover request to the decision target cell.
  • the target cell performs admission control and provides the RRC configuration as part of the handover request acknowledgement (ACK).
  • ACK handover request acknowledgement
  • the serving cell sends an RRC reconfiguration (RRCReconfiguration) message to the UE to provide the UE with the RRC configuration of the target cell.
  • the UE adjusts the configured RRC parameters and prepares to access the target cell.
  • layer 3 signaling is also used here, that is, an RRC reconfiguration complete (RRCReconfigurationComplete) message is sent to the target cell so that the UE switches to the target cell.
  • layer 3 is above layer 1 and needs the transport channel of layer 1 to be carried, so the signaling overhead and delay of layer 3 are relatively large.
  • traditional inter-cell mobility management has been unable to meet the requirements of UEs.
  • the present disclosure provides various aspects to meet the above needs.
  • the present disclosure proposes a cross-cell beam management mechanism based on layer 1 or layer 2 signaling, thereby realizing faster and more efficient inter-cell mobility management.
  • an electronic device on the user side including a processing circuit configured to: measure beams transmitted by a serving cell and at least one non-serving cell based on cell pre-configuration information; the predetermined event, send a beam report containing at least the L1 measurement results and identification information of one or more beams of one or more non-serving cells to the serving cell through L1 or L2 signaling; determine that the one or more beams are an activated beam; and setting a non-serving cell associated with the activated beam as a serving cell.
  • an electronic device on the control side including a processing circuit configured to: receive from a user equipment (UE) through L1 or L2 signaling at least one of one or more non-serving cells beam reporting of L1 measurement results and identification information for one or more beams; determining an activated beam among the one or more beams; and setting a non-serving cell associated with the activated beam as a serving cell.
  • UE user equipment
  • a communication method comprising: measuring beams transmitted by a serving cell and at least one non-serving cell based on cell pre-configuration information; in response to a predetermined event based on the measurement, through L1 or L2 signaling sending a beam report containing at least L1 measurement results and identification information of one or more beams of one or more non-serving cells to the serving cell; determining an activated beam of the one or more beams; and setting and The non-serving cell associated with the beam serves as the serving cell.
  • a communication method comprising: receiving, from a user equipment (UE) through L1 or L2 signaling, an L1 measurement result and an identity of at least one or more beams including one or more non-serving cells beam reporting of information; determining an activated beam of the one or more beams; and setting a non-serving cell associated with the activated beam as a serving cell.
  • UE user equipment
  • a non-transitory computer-readable storage medium storing executable instructions that, when executed, implement any one of the above communication methods.
  • Fig. 1 shows the flow chart of traditional cell handover
  • Figure 2 shows a simplified diagram of the architecture of an NR communication system
  • FIG. 3 shows various cells utilizing carrier aggregation (CA) under dual connectivity
  • 4A and 4B are the NR radio protocol architecture of the user plane and control plane, respectively;
  • FIG. 5 shows a schematic flowchart of inter-cell mobility management according to the present disclosure
  • FIG. 6 shows a schematic scenario of inter-cell mobility
  • Figure 7 shows a CellGroupConfig information element for configuring a cell group
  • FIG. 8 illustrates the configuration of the TCI state
  • 9A and 9B illustrate the configuration of cell pre-configuration information
  • Figure 10 shows a schematic diagram of a beam measurement model
  • Figures 11 and 12 show examples of beam reporting formats
  • FIG. 13 shows a schematic diagram of UE setting a non-serving cell as an SCell
  • 14A and 14B illustrate an example of a MAC CE for activating an SCell
  • 15A-15B show schematic diagrams of direct beam indication
  • 16A-16C show schematic diagrams of indirect beam indication
  • Figure 17 shows an example of a signaling flow for inter-cell mobility management
  • Figure 18 shows another example of a signaling flow for inter-cell mobility management
  • 19A and 19B illustrate an electronic device for the UE side and a communication method thereof according to the present disclosure
  • 20A and 20B illustrate an electronic device for a network control side and a communication method thereof according to the present disclosure
  • FIG. 21 illustrates a first example of a schematic configuration of a base station according to the present disclosure
  • FIG. 22 illustrates a second example of a schematic configuration of a base station according to the present disclosure
  • FIG. 24 illustrates a schematic configuration example of a car navigation apparatus according to the present disclosure.
  • the radio access network (NG-RAN) nodes of the NR communication system include gNB and ng-eNB, where gNB is a node newly defined in the 5G NR communication standard, which is via the NG interface Connect to the 5G core network (5GC) and provide NR user plane and control plane protocols terminating with terminal equipment (may also be referred to as "user equipment", hereinafter referred to as "UE"); ng-eNB is designed to communicate with 4G A node defined for compatibility with LTE communication systems, which may be an upgrade of an evolved Node B (eNB) of the LTE radio access network, connects devices to the 5G core network via the NG interface, and provides an evolved universal terrestrial radio interface with UE termination. Enter (E-UTRA) user plane and control plane protocols.
  • the gNB and the ng-eNB are collectively referred to as "base stations”.
  • the term “base station” used in the present disclosure is not limited to the above two kinds of nodes, but serves as an example of a control device on the network side, and has the full breadth of its usual meaning.
  • the “base station” may also be, for example, an eNB, a remote radio head, a wireless access point in an LTE communication system. An entry point, a control node in an automated factory, or a communication device that performs similar functions. Subsequent chapters will describe the application examples of the base station in detail.
  • the term "UE” has the full breadth of its usual meaning, including various terminal devices or in-vehicle devices that communicate with a base station.
  • the UE may be a terminal device such as a mobile phone, a laptop computer, a tablet computer, an in-vehicle communication device, sensors and actuators in an automated factory, etc., or elements thereof. Subsequent chapters will describe the application examples of the UE in detail.
  • the coverage area of a base station may be referred to as a "cell”.
  • Cell as used in the present disclosure includes various types of cells, eg, depending on the transmit power and coverage of the base station, a cell may include a macro cell, a micro cell, a pico cell, a home cell, and the like.
  • a cell is typically identified by a Physical Cell Identifier (PCI).
  • PCI Physical Cell Identifier
  • base stations correspond to macro cells one-to-one, but there may also be other correspondences between base stations and cells.
  • Figure 3 shows an example of a cell under Dual Connectivity.
  • the UE simultaneously accesses a base station serving as a master node (Master Node, MN) and a base station serving as a secondary node (Secondary Node, SN), and the master node serves as a control plane anchor, such as a 4G base station.
  • Master Node, MN Master Node
  • SN secondary node
  • the master node serves as a control plane anchor, such as a 4G base station.
  • one base station can simultaneously use multiple component carriers (CCs) to provide data transmission for the UE, and each component carrier can correspond to one cell.
  • CCs component carriers
  • the cells provided by the master node constitute a master cell group (MCG), where the primary and secondary carriers are called PCell and SCell, respectively.
  • the cells provided by the secondary node constitute a secondary cell group (SCG), where the primary carrier and the secondary carrier are called PSCell and SCell, respectively. Because a lot of control signaling is only sent on PCell and PSCell, for convenience of description, they are collectively referred to as special cell (sPCell) in the protocol.
  • MCG master cell group
  • SCG secondary cell group
  • PSCell primary carrier and the secondary carrier
  • a cell that is providing communication services for it can be called a serving cell (Serving Cell, SC), and correspondingly, a cell that does not provide communication services can be called a non-serving cell (Non-Serving Cell, NSC) ).
  • serving Cell Serving Cell
  • Non-Serving Cell Non-Serving Cell
  • the mobility between the serving cell and the non-serving cell of the UE is mainly discussed, and cell handover is mainly used as an example for description.
  • the so-called cell handover generally refers to handover of the primary cell PCell to another cell.
  • the inter-cell mobility to which the present disclosure is applicable may also include adding a non-serving cell as the UE's secondary serving cell SCell.
  • inter-cell mobility management involves a change in a UE's serving cell.
  • cell and base station are often used interchangeably for ease of understanding, although these actions are actually performed by the corresponding base station.
  • FIGS. 4A and 4B The NR radio protocol architecture for the base station and UE in FIG. 2 is next explained with reference to FIGS. 4A and 4B.
  • Figure 4A shows the radio protocol stack for the user plane of the UE and gNB
  • Figure 4B shows the radio protocol stack for the control plane of the UE and gNB.
  • the radio protocol stack is shown with three layers: Layer 1, Layer 2, and Layer 3.
  • Layer 1 which is the lowest layer, is also referred to as a physical layer, and implements various physical layer signal processing to provide transparent transmission of signals.
  • L1 provides physical transport channels for the layers above.
  • Layer 2 is above the physical layer and is responsible for the link between the UE and the base station above the physical layer.
  • L2 includes a medium access control (MAC) sublayer, a radio link control (RLC) sublayer, and a packet data convergence protocol (PDCP) sublayer, which are terminated on the network side by the base station ( ng-eNB, gNB), terminated at the UE at the user side.
  • the UE and the base station also include a Service Data Adaptation Protocol (SDAP) sublayer.
  • SDAP Service Data Adaptation Protocol
  • the MAC sublayer is responsible for allocating various radio resources (eg, resource blocks) in a cell among UEs.
  • the UE and the base station also include layer 3 (L3), that is, a radio resource control (RRC) layer.
  • the RRC layer is responsible for obtaining radio resources (ie, radio bearers) and for configuring the lower layers using RRC signaling between the base station and the UE.
  • the UE and the non-access stratum (NAS) control protocol in the core network (AMF) perform functions such as authentication, mobility management, security control, and the like.
  • both the base station and the UE have many antennas, such as dozens, hundreds or even thousands of antennas.
  • a three-layer mapping relationship is generally defined around the antenna, so that it can successfully undertake the channel model and communication standards.
  • the bottom layer is the most basic physical unit - the antenna (also known as the antenna element).
  • Each antenna element radiates electromagnetic waves according to their respective amplitude parameters and phase parameters.
  • the antenna array elements are arranged into one or more antenna arrays in the form of a matrix, and an antenna array may be composed of antenna array elements of an entire row, an entire column, multiple rows, and multiple columns.
  • each antenna array actually constitutes an independently configurable Transceiver Unit (TXRU).
  • TXRU Transceiver Unit
  • the antenna pattern of the TXRU can be adjusted so that the electromagnetic wave radiation emitted by all the antenna elements forms a narrower beam pointing to a specific spatial direction, that is, Implement beamforming.
  • one or more TXRUs are logically mapped to form an antenna port (Antenna Port) seen at the system level.
  • An "antenna port” is defined such that a channel carrying a symbol on a certain antenna port can be inferred from a channel carrying another symbol on the same antenna port. This means that different signals transmitted by the same antenna port experience the same channel environment.
  • an antenna port can be characterized by a reference signal.
  • the reference signals include, for example, Channel State Information Reference Signal (CSI-RS), DM-RS, and so on.
  • CSI-RS Channel State Information Reference Signal
  • DM-RS DM-RS
  • SSB synchronization signal block
  • a quasi-co-located (QCL) relationship may exist between different antenna ports.
  • Two antenna ports are considered quasi-co-located if the large-scale properties of the channel carrying the symbols on one antenna port can be inferred from the channel carrying the symbols on the other antenna port.
  • the channel large-scale property parameters estimated from the signal at antenna port A are also suitable for the signal at antenna port B when, for example, a QCL relationship is satisfied between antenna port A and antenna port B.
  • the large-scale properties include at least one of the following: delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial reception parameters.
  • an antenna port can be regarded as an identification of a physical channel or a physical signal based on the air interface environment, and the channel environment changes of the same antenna port are roughly the same.
  • spatial reception parameters include beamforming parameters used to form receive beams to achieve optimal reception of beam signals from corresponding spatial directions.
  • spatial transmit parameters include beamforming parameters used to form transmit beams directed towards a particular spatial direction.
  • Spatial receive parameters and spatial transmit parameters can be embodied as spatial domain receive filters and spatial domain transmit filters, respectively. In the present disclosure, for the convenience of explanation, sometimes the transmit beam and the receive beam are not distinguished, and will be collectively referred to as "beam”.
  • the base station and UE determine the beam to be used for data transmission by performing beam scanning.
  • the base station can use nt beams to send nr reference signals in sequence, so as to send nt ⁇ nr reference signals in total, and the UE can receive these reference signals with nr beams and measure them, for example, obtain L1- RSRP, L1-SINR, etc., and report a predetermined number (for example, 2, 4) reference signals with the best measurement results.
  • the base station can select one of these reported reference signals and indicate it to the UE.
  • the base station beam for transmitting the reference signal and the UE beam for receiving the reference signal will be determined as the best beam pair for subsequent data transmission.
  • the principle of up-scanning is similar.
  • the base station beam-UE beam pair that is most suitable for the current channel conditions can be selected through the above beam scanning process, so that the transmit beam is aligned with the channel angle of departure (AOD) and the receive beam is aligned with the channel angle of arrival (AOA) ). Therefore, intra-cell mobility management can be achieved by managing beams.
  • the above beam management mainly adopts the signaling of L1 or L2, so as to flexibly and quickly adapt to the change of the wireless channel.
  • inter-cell mobility management mainly relies on layer 3 signal measurement and delivery of RRC signaling.
  • the measurement of L3 requires a long time of filtering to obtain a converged result, and the encoding, decoding and transmission of RRC signaling requires more processing and transmission resources. Therefore, for UEs in high-speed movement or UEs requiring low latency is inappropriate.
  • the present disclosure contemplates L1 and L2 based inter-cell mobility management mechanisms. This requires abandoning the existing L3-based mobility management process. It is not feasible to directly apply the beam management method currently used for intra-cell mobility, because the UE cannot directly perform signaling interaction with the non-serving cell until the handover is successful.
  • the present disclosure makes special arrangements for various aspects specific to inter-cell mobility management to achieve a more efficient serving cell change procedure.
  • FIG. 5 shows a schematic flowchart of inter-cell mobility management according to the present disclosure, which shows the stages of cell pre-configuration Stg0, beam measurement Stg1, beam reporting Stg2, beam activation Stg3, and beam indication Stg4.
  • the serving cell configures a large number of cell-level parameters for the UE through RRC signaling.
  • the RRC parameter of the serving cell currently accessed by the UE is the most basic, which configures how the UE works correctly in the cell.
  • a cell group eg, MCG or SCG
  • MCG or SCG including one sPCell and several SCells serves the UE.
  • the network may also configure RRC parameters of at least one non-serving cell for the UE for use in the following inter-cell mobility procedures. How many non-serving cells and which non-serving cells are configured depends on the internal implementation of the network.
  • Figure 6 shows a schematic scenario of inter-cell mobility, in which by estimating the moving direction of the UE, the network can predict the potential cells NSC#A and NSC#B that the UE may request to enter, so as to configure the cell SC#0 for the UE in advance , RRC parameters of NSC#A and NSC#B.
  • the cell SC#0 is in an active state for the UE, that is, it is the serving cell of the UE, while the cells NSC#A and NSC#B are in an inactive state, that is, they are non-serving cells of the UE. It should be understood that the scenario shown in FIG. 6 is merely exemplary and is used for illustrative and non-limiting purposes.
  • the serving cell SC#0 sends RRC signaling including cell pre-configuration information to the UE through its serving beam.
  • the cell pre-configuration information may be composed of many information elements (IEs), and different information elements contain different configuration parameters.
  • RRC parameters can be configured using nested relationships.
  • Figure 7 shows the information element CellGroupConfig in TS 38.331 for configuring a cell group MCG or SCG, which has an information element spCellConfig which further contains the RRC parameters for the special cell sPCell.
  • the RRC parameters configured in advance by the serving cell include at least identification information of each cell and its beam.
  • the serving cell or the non-serving cell can be identified by eg PCI, while the beam of the cell can be identified by reference signal.
  • a reference signal corresponding to a group of downlink beams of the cell may be configured in the RRC parameters. Therefore, measuring these reference signals at the UE side is equivalent to the process of scanning these downlink beams.
  • the reference signals available in this disclosure are not limited to reference signals for layer 3 mobility measurements, such as SSB or CSI-RS for mobility, but are extended to other The reference signal resource for the purpose.
  • the reference signal configured for each cell may be a reference signal resource for layer 1 purposes, including: SSB for initial access, CSI-RS for beam management, CSI-RS for tracking, CSI-RS obtained from channel state information.
  • the reference signal may also be a downlink positioning reference signal, that is, a PRS.
  • the PRS is a downlink reference signal defined in Rel.16 for intra-cell or inter-cell use, and the purpose is to allow the UE to complete the positioning function by measuring the reference signal.
  • the beam is identified by the index of the associated reference signal resource.
  • the RRC parameter may directly refer to the beam with the index of the reference signal, such as the SSB resource indicator (SSBRI), the CSI-RS resource indicator (CRI), the index of the PRS resource, and so on.
  • the RRC parameters may also identify beams by including the corresponding Transmission Configuration Indication (TCI) status.
  • TCI Transmission Configuration Indication
  • FIG. 8 illustrates the configuration of the TCI state.
  • the TCI state is identified by the TCI state ID.
  • Each TCI state contains parameters for configuring a quasi-co-located (QCL) relationship between one or two downlink reference signals and the DMRS ports of the PDSCH/PDCCH.
  • QCL quasi-co-located
  • For the first downlink reference signal, this quasi-co-location relationship is configured by the RRC layer parameter qcl-Type1. If there is a second downlink reference signal, the quasi-co-location relationship is configured by qcl-Type2.
  • the qcl-Type1 or qcl-Type2 parameter includes the following information: Serving Cell Index ServCellIndex; Bandwidth Part ID - BWP-Id; Source Reference Signal resources providing QCL information, including NZP-CSI-RS resources ( identified by NZP-CSI-RS-ResoureId) and SSB resource (identified by SSB-Index).
  • the QCL type corresponding to each downlink reference signal is given by the qcl-Type parameter, and includes types such as typeA, typeB, typeC, and typeD.
  • typeD is the QCL relationship with respect to the spatial reception parameters, indicating that the reference indicated by the TCI state can be received using the spatial reception parameters (receive beams) of the source reference signal (eg SSB or CSI-RS) previously referenced in the TCI state Signals (eg DMRS).
  • the source reference signal eg SSB or CSI-RS
  • TCI state Signals eg DMRS
  • a cell can set a group of TCI states for a group of its beams, and reference signals corresponding to the beams are referenced in each TCI state. Therefore, the TCI status can also be used to identify the corresponding beam.
  • the serving cell may configure the UE with the TCI state corresponding to the beam of the serving cell or the non-serving cell. The UE can decode the TCI status of each cell from the RRC parameters, and find the referenced reference signal from the TCI status.
  • the serving cell may also pre-configure any other useful parameters in the Stg0 stage.
  • the serving cell may also pre-configure measurement-related RRC parameters, such as but not limited to: parameters related to measurement gaps, parameters for beam combining/selection, parameters for L3 filtering of cell quality, parameters for L3 parameters for beam filtering, etc.
  • measurement-related RRC parameters such as but not limited to: parameters related to measurement gaps, parameters for beam combining/selection, parameters for L3 filtering of cell quality, parameters for L3 parameters for beam filtering, etc.
  • the serving cell may also pre-configure RRC parameters related to beam reporting, such as but not limited to: parameters for evaluating reporting criteria, the maximum number of reporting beams, reporting format information, and so on.
  • the serving cell may also preconfigure RRC parameters related to cell access, such as PRACH resources of the cell, etc., so as to assist the UE to access the target cell.
  • RRC parameters related to cell access such as PRACH resources of the cell, etc.
  • the cell pre-configuration information sent by the serving cell to the UE may include the respective RRC parameters of the local cell SC#0, the non-serving cell NSC#A, and the non-serving cell NSC#B.
  • the cell pre-configuration information includes a configuration parameter respectively.
  • Figure 9B shows an example of differential configuration of cell RRC parameters.
  • the cell pre-configuration information may consist of common configuration parameters and cell-specific configuration parameters.
  • the NW can configure most of the RRC parameters of SC#0, NSC#A and NSC#B to be the same, so that the UE uses the same set of RRC parameters.
  • each cell can be configured individually, such as the ID of each cell (ie, PCI, 0 to 1007), the TCI status related to PCI in each cell, and each cell can be configured by The UE identifies a downlink reference signal, etc., which is different from the current serving cell.
  • the UE can determine whether to trigger mobility by performing beam measurement ( Stg1 ). Triggers on intra-cell mobility are not discussed here.
  • the UE measures multiple (at least one) beams of the current serving cell (eg SC#0) and non-serving cells (eg NS#A and NSC#B) based on the cell pre-configuration information provided in the Stg0 stage.
  • the current serving cell eg SC#0
  • non-serving cells eg NS#A and NSC#B
  • the UE may determine to perform L1 measurement or L3 measurement on the reference signal.
  • L1 measurement and L3 measurement is briefly introduced with reference to FIG. 10 .
  • Figure 10 shows a schematic diagram of the beam measurement model.
  • the K beams as model inputs correspond to measurements of SSB, CSI-RS, PRS resources.
  • the measurement model in Figure 10 is handled in the same way for serving cells and non-serving cells. The meaning of each module and reference point in the measurement model is as follows.
  • Beam combining/selection Combine beam specific measurements to derive cell quality.
  • the behavior of beam combining/selection is standardized, and the configuration of this module is provided by RRC signaling (ie, can be pre-configured at Stg0 stage).
  • the reporting period of point B is equal to one measurement period of point A 1 .
  • - L3 filtering on cell quality filtering performed on measurements provided at point B.
  • the behavior of the layer 3 filters is standardized, and the configuration of the layer 3 filters is provided by RRC signaling (ie, can be preconfigured at the Stg0 stage).
  • the filtering and reporting period of point C is equal to one measurement period of point B.
  • the reporting rate is equal to the reporting rate at point B. This measurement is used as input to one or more evaluations of the reporting criteria.
  • reporting criteria Check if actual measurement report is required at point D.
  • the evaluation can be based on more than one measurement stream at reference point C, eg, to compare different measurements, as shown by inputs C and C1 .
  • the UE should evaluate the reporting criteria at least every time a new measurement result is reported.
  • Reporting standards are standardized and their configuration is provided through RRC signaling (ie, can be pre-configured at Stg0 stage).
  • Measurement report information (message) sent on the radio interface.
  • - L3 beam filtering filtering performed on the measurements provided at point A1 (ie beam specific measurements).
  • the behavior of the beam filter is standardized, and the configuration of the beam filter is provided by RRC signaling (ie, can be preconfigured in the Stg0 stage).
  • the filtering and reporting period of point E is equal to one measurement period of A1.
  • the reporting rate is equal to the reporting rate of A1. This measurement is used as input to select X measurements to report.
  • - Beam selection for reporting select X measurements from measurements provided at point E.
  • the behavior of beam selection is standardized, and the configuration of this module is provided by RRC signaling (ie, can be preconfigured at Stg0 stage).
  • L1 filtering occurs at two different levels: L1 filtering at layer 1 (physical layer) for beam quality; and L3 filtering at layer 3 (RRC layer) for cell quality .
  • L1 filtering may not require RRC parameters and has a UE-specific implementation, which can obtain measurement results relatively quickly, but has the disadvantage that the measurement results may be unstable.
  • L1 measurement typically two measurement indicators, L1-RSRP and L1-SINR, can be obtained.
  • L3 filtering requires RRC parameters, and the UE needs to perform filtering according to the time domain filtering parameters configured by the network. Although a relatively convergent measurement result can be obtained, it needs to consume more measurement time.
  • L3 measurement typically three measurement indicators of L3-RSRP, L3-SINR and L3-RSSI can be obtained.
  • the UE can measure L3 reference signals for mobility, including SSB for mobility and CSI-RS for mobility.
  • the former can be based on RRC configuration, or can be discovered by the UE itself through frequency sweep. The latter can only be configured by RRC.
  • the network preferably provides a QCL-typeD SSB to realize the time domain synchronization of the CSI-RS.
  • the UE may perform L3 measurement (including L1 filtering and L3 filtering) on it, and trigger event evaluation based on the L3 measurement index, ie, the "Report Criteria Evaluation" module in FIG. 10 .
  • embodiments of the present disclosure extend the range of reference signals that can be used for inter-cell mobility management.
  • the UE can also measure the reference signals for L1 use of each cell, including but not limited to: SSB for initial access, which can be configured in advance through RRC, or can be detected autonomously by the UE; used for beams
  • SSB for initial access
  • RRC Radio Resource Control
  • the CSI-RS for management, tracking, and channel state information requires an SSB from the same cell that has a QCL-typeD relationship with it; and a positioning reference signal PRS.
  • the UE may perform only L1 measurement (including L1 filtering) on it, and trigger event evaluation (not shown in FIG. 10 ) based on the L1 measurement indicator (ie, the measurement result output by point A1 in Shows).
  • the UE may continue to perform beam measurement according to a predetermined measurement period until a predetermined event is triggered.
  • the measurement result in the Stg1 stage can trigger beam reporting to the serving cell.
  • the event triggering beam reporting may be based on L3 measurements.
  • L3 measurement-based events can be defined:
  • L3-A1 The L3 measurement result of the serving cell is better than an absolute threshold
  • L3-A2 The L3 measurement result of the serving cell is worse than an absolute threshold
  • L3-A3 The L3 measurement result of the non-serving cell is better than PCell/PSCell by an offset
  • L3-A4 The L3 measurement result of the non-serving cell is better than an absolute threshold
  • L3-A5 The L3 measurement of PCell/PSCell is worse than one absolute threshold and the L3 measurement of non-serving cell/SCell is better than another absolute threshold.
  • the current serving cell can provide sufficiently good communication quality, so inter-cell mobility may not be triggered, and naturally there is no need to report the beam measurement result.
  • the event L3-A2 occurs, it means that the serving cell cannot provide the required communication quality, so inter-cell mobility can be triggered, but because there is no measurement from the non-serving cell for comparison, the UE does not know which non-serving cell is better. Therefore, the UE can measure all possible non-serving cells according to the preconfigured RRC parameters, that is, perform beam measurement in Stg1 to obtain measurement results of one or more non-serving cells.
  • the non-serving cell gets better and the serving cell gets worse.
  • the UE knows which non-serving cell is getting better, so it can selectively measure the beam (reference signal) of that cell, thereby narrowing the measurement range to reduce unnecessary overhead.
  • the UE can also measure all possible non-serving cells to obtain other non-serving cells whose L3 measurement indicators meet the requirements.
  • the L1 measurement of the layer 1 reference signal can also trigger beam reporting. This is different from the existing inter-cell mobility management mechanism.
  • events based on L1 measurements can be customized as follows:
  • L1-B1 The L1 measurement result of the serving cell is better than an absolute threshold
  • L1-B2 The L1 measurement result of the serving cell is worse than an absolute threshold
  • L1-B3 The L1 measurement result of the non-serving cell is an offset better than PCell/PSCell;
  • L1-B4 The L1 measurement result of the non-serving cell is better than an absolute threshold
  • L1-B5 L1 measurement of PCell/PSCell is worse than one absolute threshold and L1 measurement of non-serving cell/SCell is better than another absolute threshold.
  • inter-cell mobility may not be triggered, and beam measurement results need not be reported. And when events L1-B2 occur, inter-cell mobility can be triggered.
  • the UE may measure all possible non-serving cells according to the preconfigured RRC parameters, ie, perform beam measurement in Stg1 to obtain measurement results of one or more non-serving cells.
  • the non-serving cell gets better and the serving cell gets worse. Since the UE knows which non-serving cell is getting better, it can selectively report the beam (reference signal) of that cell. Of course, the UE can also measure all possible non-serving cells to obtain other non-serving cells whose L1 measurement indicators meet the requirements.
  • the UE may acquire beam measurement results of the non-serving cell that triggered the event or all non-serving cells.
  • the UE may start performing L1 measurements of the beams of the non-serving cell in the next measurement cycle to obtain metrics such as L1-RSRP, L1-SINR, and the like.
  • the UE may obtain L1 measurements of the beams of the non-serving cell from the measurement results of the current measurement cycle (ie, the measurement results of the triggering event) without waiting for the next measurement cycle. As shown in the measurement model in Fig.
  • the UE can derive the L1 indicator to be reported from the measurement result of the current measurement period.
  • the UE may select the beam measurement result to be reported according to the reporting configuration parameters preconfigured in the Stg0 stage.
  • the UE may be configured to report at most X (eg, X is 2, 4, 8, etc.) beams, so the UE may select the X beams with the best L1 measurement results to report.
  • the UE may preferably report two or more beams for the serving cell to refer to when making cell handover decisions.
  • the UE may report one beam per non-serving cell, which is equivalent to reporting X handover target cell candidates for serving cell selection.
  • the UE can select the beam of the non-serving cell whose L1 measurement result is better than that of the serving cell, because the UE always wants to switch to a cell with better communication quality.
  • the autonomy of the UE may be stronger, and the UE itself selects a non-serving cell it wishes to access from one or more non-serving cells.
  • the UE may select a non-serving cell with the best performance based on the measured L1 indicators (such as L1-RSRP, L1-SINR) of the non-serving cell, and only report the beam measurement result of this cell.
  • the serving cell has no more choice when making cell decisions.
  • the UE may report the beam measurement result to the serving cell in various ways.
  • the UE forms the beam report with the identification information of the beam of the non-serving cell determined to be reported and the L1 measurement result.
  • FIG. 11 shows CSI reporting as an example of beam reporting.
  • the beam to be reported is identified by the index of its reference signal, such as CRI or SSBRI, and of course the index of the PRS resource (not shown), and the 2nd, 3rd, 4th beams (if any)
  • the number of L1 measurements is not limited to 4
  • the UE can use the existing beam reporting format without changing the reporting format.
  • the content of the beam report should be unambiguous for both the UE and the serving cell.
  • the serving cell should be able to know which cell it belongs to from the reference signal index (eg CRI, SSBRI) listed in the beam report.
  • the reference signal index eg CRI, SSBRI
  • the serving cell cannot determine whether the reference signal is from its own cell or from the non-serving cell only based on the reference signal index.
  • the UE also needs to include information about which cell the reference signal comes from in the beam report.
  • the content reported by the UE may include the PCI of the non-serving cell to which the reference signal belongs.
  • the serving cell can report from the UE
  • the reference signal index distinguishes whether it is from a serving cell or a non-serving cell.
  • the UE can also report information about the triggered measurement event for the serving cell to use when making a handover decision.
  • the beam report may include an index triggering the measurement event (eg, L3-A2 to L3-A5 or L1-B2 to L1-B5 listed above) associated with each reference signal.
  • the serving cell knows the type of the event, it can perform mobility management on the UE in a targeted manner. Of course, this information is not required, and if the serving cell does not know the event type, rough mobility management can also be performed based on the reported L1 measurement result of the non-serving cell.
  • the UE may organize the content that needs to be reported into other formats.
  • the CSI report format can be compatible with the existing beam management mechanism to the greatest extent, it is possible to define a new report format that is more suitable for inter-cell mobility management.
  • beam reporting is done at layer 1 or layer 2.
  • the UE may complete the reporting through uplink control information (UCI) carried by a physical uplink control channel (PUCCH).
  • the UE may complete the reporting through UCI or MAC Control Element (MAC CE) carried by the Physical Uplink Shared Channel (PUSCH).
  • UCI belongs to layer 1 control signaling
  • MAC CE belongs to layer 2 control signaling.
  • the UE can report reference signals (such as CRI, SSBRI, PRS index identification) and L1 measurement results (such as L1-RSPR, L1-SINR) corresponding to the beams in UCI or MAC CE, as well as optional cell identification information, measurement events type, etc.
  • the UE may also include the TCI status associated with the beam in the MAC CE.
  • the TCI state may include identification information of a cell (ServCellIndex) and a reference signal corresponding to a beam, so it can also be used as identification information of a beam.
  • beam reporting can be triggered by the serving cell, including periodic reporting, semi-static reporting, and aperiodic reporting, and the UE can report on available transmission resources pre-configured or temporarily scheduled by the serving cell, such as PUCCH resources or PUSCH resources.
  • triggering beam reporting by the UE is a more preferable way, because unnecessary overhead to the system can be avoided.
  • the UE can request PUCCH resources or PUSCH resources from the serving cell for sending UCI or MAC CE containing the reporting content.
  • the serving cell can pre-configure the maximum number of transmissions N of beam reports for the UE (for example, configured in the pre-configuration phase Stg0 described above), when the UE sends the beam report , if no response from the serving cell is received within a certain period of time (for example, beam activation information to be described later), the UE's counter is incremented by 1, and then the UE retransmits the beam report until a response from the serving cell is received or reaches The maximum number of transfers N. If the PUCCH transmission for the maximum number of transmissions N is unsuccessful, the UE may consider that the uplink of the serving cell has lost synchronization, and thus re-initializes access.
  • the transmission of PUSCH itself has implicit error control, that is, when the transmission fails, the UE will receive a NACK, and if the UE does not receive a NACK, it means the transmission is successful . Therefore, the UE can know whether the UCI or MAC CE is correctly received by the network.
  • the control mechanism described above may also be introduced into the transmission of the PUSCH, that is, to specify the maximum number of transmissions of beam reporting performed by the UE. When the UE fails to attempt the maximum number of transmissions, it will consider giving up the PUSCH transmission, and the uplink of the serving cell has lost synchronization, thus re-initializing access.
  • the UE may also report the beam measurement result of the serving cell together for the serving cell to refer to when performing mobility management.
  • the reporting content of the serving cell is no different from that of the non-serving cell, and details are not repeated here.
  • the serving cell After receiving the beam report from the UE, the serving cell performs inter-cell mobility management for the UE.
  • inter-cell mobility includes cell handover, ie, the UE is handed over from the current serving cell to a certain non-serving cell.
  • the serving cell decides whether handover is necessary and further decides which non-serving cell to hand over to.
  • the serving cell may also consider other factors than the reported L1 measurement result, such as the event type that triggers beam reporting, the UE's movement trajectory, and so on.
  • the handover decision belongs to the internal implementation of the network and may vary with different handover strategies, and will not be described in detail here.
  • inter-cell mobility includes addition or deletion of secondary serving cells (SCells).
  • SCells secondary serving cells
  • the serving cell determines whether a non-serving cell needs to be added as the SCell of the UE based on the beam measurement results of each cell included in the beam report. For example, the serving cell can see from the L1 measurement result reported by the UE that the communication quality of a certain non-serving cell (such as NSC#A in FIG. 6 ) has improved, and decides to add the non-serving cell to the MCG or SCG of the UE, while No need to change PCell or PSCell.
  • a certain non-serving cell such as NSC#A in FIG. 6
  • the serving cell needs to select one or more non-serving cell candidates reported by the UE as a replacement or supplement for the current serving cell.
  • setting the selected non-serving cell as the serving cell may be referred to as "activating" the non-serving cell.
  • the serving cell may attempt to send a handover request to the preliminarily selected non-serving cell candidate to inquire whether the non-serving cell accepts handover. If an affirmative acknowledgment (ACK) for the handover request is received, the serving cell determines that the non-serving cell can be activated, otherwise determines that the non-serving cell does not allow UE access, and selects other non-serving cell candidates instead.
  • ACK affirmative acknowledgment
  • the UE autonomously selects which non-serving cell to activate, the UE only reports the beam measurement result of one non-serving cell.
  • the serving cell has no other choice, and only the possibility of handover to the non-serving cell can be considered in the handover decision. For example, a handover request is sent to the non-serving cell to ask it whether to accept the handover. ACK, it is determined that the non-serving cell can be activated.
  • the serving cell may notify the UE of the decision result.
  • the non-serving cell to be activated may not be limited to one.
  • activation of a non-serving cell may be achieved through activation of an associated beam.
  • the serving cell may send beam activation information to the UE through L1 or L2 signaling.
  • the serving cell may send a MAC CE containing beam activation information to the UE over the PDSCH.
  • MAC CE is layer 2 control signaling.
  • the MAC CE may be a MAC CE for activating the TCI state in which the TCI state associated with the activated beam is activated.
  • the UE finds the reference signal contained in it from the TCI state, so as to know that the beam corresponding to the reference signal has been activated, which also means that the associated non-serving cell is activated.
  • the serving cell may send the DCI containing beam activation information to the UE through the PDCCH or PDSCH.
  • DCI is layer 1 control signaling.
  • the DCI can be used to dynamically activate or update the TCI status indicated therein.
  • the UE finds the reference signal contained therein from the TCI state, so as to know that the beam corresponding to the reference signal has been activated, which also means that the associated non-serving cell is activated.
  • the serving cell may also directly reference the index of the reference signal corresponding to the activated beam in the MAC CE or DCI, as long as it can convey which beam or which is activated.
  • the UE may set the non-serving cell associated with the activated beam as the serving cell. For example, the UE may switch from the current serving cell to the non-serving cell, including starting an initial access procedure with the non-serving cell, establishing an RRC connection with the non-serving cell, and disconnecting the RRC connection with the serving cell.
  • the UE may add the non-serving cell associated with the activated beam as the secondary serving cell.
  • the UE may include the beam of NSC#A in the beam report, eg, in the beam reporting stage (Stg2), which is equivalent to recommending NSC#A as the SCell of the UE, while SC#0 may In the beam activation phase (Stg3), downlink signaling such as MAC CE or DCI is used to activate the beam of NSC#A as a response to UE recommendation, thereby activating NSC#A as an SCell.
  • Figures 14A and 14B show two MAC CE formats that the serving cell can use to activate/deactivate the SCell, where the upper MAC CE has 1 octet and the lower MAC CE has 4 octets.
  • R is a reserved bit
  • C i indicates the state of the corresponding SCell. If C i is set to 1, it means that if an SCell with index ScellIndex i is configured for the MAC entity, the SCell with index ScellIndex i is activated, and if C i is set to 0, the SCell with index ScellIndex i is deactivated activation.
  • the UE may start an initial access procedure with NSC#A, which will not be described in detail here.
  • the UE may establish an RRC connection with the cell through an initial access procedure, and then may perform downlink or uplink transmission with the cell.
  • the activated non-serving cell In order to perform PDCCH or PDSCH transmission with the UE, the activated non-serving cell (now the new serving cell, but still called non-serving cell for distinction) needs to indicate to the UE the beam used to receive the PDCCH or PDSCH.
  • the non-serving cell may perform beam indication through L1 or L2 signaling.
  • L1 signaling may include DCI
  • L2 signaling may include MAC CE.
  • QCL relationship between the two reference signals what is mainly conveyed is the QCL relationship between the two reference signals.
  • the beam indication mechanism utilizing the TCI state is applicable to the beam indication of the present disclosure.
  • the TCI status conveys the QCL-typeD relationship between the reference signal (eg SSB, CSI-RS) referenced therein and the DMRS, which means that the UE can use the previous Spatial reception parameters (reception beams) for receiving reference signals in TCI state to receive DMRS of PDCCH or PDSCH.
  • the reference signal eg SSB, CSI-RS
  • reception beams Spatial reception parameters
  • the first is a direct QCL indication.
  • this direct beam indication it is said that from one reference signal directly to another reference signal.
  • the following QCL indication can be considered:
  • the left side of the arrow is the reference signal referenced in the TCI state (ie, the source reference signal indicated by the QCL), which may be the reference signal from the non-serving cell measured by the UE in the Stg1 stage, including: L1 reference signal, such as SSB, CSI-RS, PRS, etc. of L1; and reference signals of L3, such as SSB, CSI-RS, etc.
  • L1 reference signal such as SSB, CSI-RS, PRS, etc. of L1
  • reference signals of L3 such as SSB, CSI-RS, etc.
  • the right side of the arrow is the target reference signal indicated by the QCL, which may be the DMRS of the PDCCH of the non-serving cell or the DMRS of the PDSCH.
  • FIG. 15A shows an exemplary scenario utilizing the above-described QCL indication.
  • SC#0 is a serving cell before mobility management
  • NSC#A is a non-serving cell activated in mobility management.
  • both the source reference signal shown as "measurement RS” in Fig. 15
  • DMRS target reference signal
  • the cell NSC #A When performing PDCCH or PDSCH transmission, the beam that transmits the measurement RS is used to transmit the PDCCH or PDSCH, and accordingly, the UE uses the beam that receives the measurement RS to receive the PDCCH or PDSCH.
  • the network may transmit the PDCCH/PDSCH DMRS of the serving cell to the UE through the Transmit Receive Point (TRP) of the non-serving cell.
  • TRP Transmit Receive Point
  • the PDCCH or PDSCH of SC#0 can be transmitted via the fiber optic connection Send it to NSC#A, and then send it out through the TRP of NSC#A. Therefore, in this case, the following QCL indications can be considered:
  • the left side of the arrow is the source reference signal referenced in the TCI state, which may be the reference signal from the non-serving cell measured by the UE in the Stg1 stage, including: L1 reference signal, such as L1 SSB, CSI-RS, PRS etc.; and L3 reference signals, such as SSB, CSI-RS, etc.
  • L1 reference signal such as L1 SSB, CSI-RS, PRS etc.
  • L3 reference signals such as SSB, CSI-RS, etc.
  • the right side of the arrow is the target reference signal indicated by the QCL, which may be the DMRS of the PDCCH of the serving cell or the DMRS of the PDSCH.
  • the second is an indirect QCL indication.
  • the indirect QCL relationship it means that the source reference signal of the QCL needs to transmit the QCL relationship to the final DMRS through the intermediate reference signal.
  • SSB SSB
  • a reference signal having a QCL-TypeD relationship with the SSB is required as an intermediate RS to transmit the QCL relationship to other reference signals, that is, the DMRS of PDCCH/PDSCH.
  • the following QCL indication can be considered:
  • the leftmost reference signal is the QCL source that should be used as DMRS, but for various reasons, this reference signal may not be suitable for beam indication, such as there is no TCI state corresponding to the reference signal, The TCI status does not indicate a QCL-typeD relationship or the like.
  • NSC#A can use the TCI state including the intermediate reference signal (eg TRS or CSI-RS) for beam indication, and when the UE receives the TCI state, based on the pre-configured intermediate reference
  • the QCL-TypeD relationship between the signal and the measurement reference signal automatically uses the receive beam of the measurement reference signal to receive the PDCCH or PDSCH from NSC#A.
  • the following QCL indications can be considered:
  • the target reference signal is the DMRS of the PDCCH or PDSCH of the serving cell SC#0
  • the intermediate reference signal may be the reference signal from SC#0 or the NSC Reference signal for #A.
  • the premise is that the QCL-TypeD relationship between the intermediate reference signal and the measurement reference signal is configured for the UE in advance.
  • the base station and the UE can use the downlink transmission beam for uplink transmission, that is, the UE uses the downlink receiving beam for uplink transmission, while the base station uses the downlink transmission beam for uplink transmission.
  • the downlink transmit beam is used for uplink reception.
  • FIG. 17 shows a schematic diagram of a signaling flow of inter-cell mobility management according to an embodiment.
  • the serving cell pre-configures the RRC parameters of the cell and the non-serving cell to the UE (S0).
  • the UE may continuously measure downlink reference signals (S1) from the serving cell and the non-serving cell according to the measurement period, and detect whether the inter-cell mobility is triggered based on the L3 measurement and/or the L1 measurement. After a predetermined measurement event occurs, the UE reports beam reports on one or more non-serving cells to the serving cell (S2). Optionally, the UE may also send beam reports about the serving cell to the serving cell together or separately.
  • S1 downlink reference signals
  • S2 downlink reference signals
  • the UE may also send beam reports about the serving cell to the serving cell together or separately.
  • the serving cell makes a handover decision based at least on the beam report (S3).
  • the serving cell sends a handover request to the handover target cell, performs admission control with a non-serving cell that is the target cell, and feeds back an ACK for the handover request to the serving cell when accepting handover. Subsequently, the serving cell transmits activation information on the beam of the non-serving cell to the UE through MAC CE or DCI (S4).
  • the UE In response to receiving the beam activation information, the UE activates the non-serving cell associated with the activated beam (S5), eg, switches to the serving cell or adds the non-serving cell as an SCell.
  • S5 the non-serving cell associated with the activated beam
  • the non-serving cell may perform beam indication (S6) to the UE through the MAC CE or DCI, so as to designate the beam used by the UE to receive the PDCCH or PDSCH.
  • S6 beam indication
  • FIG. 18 shows a schematic diagram of a signaling flow of inter-cell mobility management according to another embodiment. The differences between FIG. 18 and FIG. 17 are mainly introduced here.
  • the UE selects a non-serving cell to be activated, and transmits a beam report on the non-serving cell to the serving cell (S21).
  • the serving cell only needs to consider the non-serving cell reported by the UE when making the handover decision (S31), and sends a handover request to it.
  • the UE may autonomously activate the selected non-serving cell (S51) without beam activation information from the serving cell.
  • FIG. 19A is a block diagram illustrating an electronic device 100 according to the present disclosure.
  • the electronic device 100 may be a UE or a component of a UE.
  • the electronic device 100 includes a processing circuit 101 .
  • the processing circuit 101 at least includes a measurement unit 102 , a reporting unit 103 , a determination unit 104 , and a setting unit 105 .
  • the processing circuit 101 may be configured to perform the communication method shown in FIG. 19B.
  • Processing circuitry 101 may refer to various implementations of digital circuitry, analog circuitry, or mixed-signal (combination of analog and digital) circuitry that perform functions in a computing system.
  • Processing circuits may include, for example, circuits such as integrated circuits (ICs), application specific integrated circuits (ASICs), portions or circuits of individual processor cores, entire processor cores, individual processors, such as field programmable arrays (FPGAs). ), and/or a system including multiple processors.
  • ICs integrated circuits
  • ASICs application specific integrated circuits
  • FPGAs field programmable arrays
  • the measurement unit 102 in the processing circuit 101 is configured to measure the beams transmitted by the serving cell and the at least one non-serving cell based on the cell pre-configuration information, ie, perform step S101 in FIG. 19B .
  • the cell pre-configuration information at least includes identification information of each cell and a reference signal corresponding to its beam.
  • Measuring the beam includes measuring downlink reference signals transmitted through the beam, such as SSB, CSI-RS, PRS of layer 1, or SSB, CSI-RS of layer 3, and so on.
  • the reporting unit 103 is configured to, in response to a predetermined event based on the measurement, send to the serving cell through L1 or L2 signaling at least a beam report containing L1 measurement results and identification information of one or more beams of one or more non-serving cells, That is, step S102 in FIG. 19B is executed.
  • the determination unit 104 is configured to determine the activated beam, that is, to perform step S103 in FIG. 19B .
  • the determination unit 104 may determine the activated beam based on the beam activation information from the serving cell.
  • the determining unit 104 determines that the beam of the non-serving cell is an activated beam.
  • the setting unit 105 is configured to set the non-serving cell associated with the activated beam as the serving cell, ie to perform step S104 in FIG. 19B .
  • the setting unit 105 may set a non-serving cell associated with the activated beam as a serving cell by switching to it, or add the non-serving cell as a secondary serving cell.
  • the electronic device 100 may also include, for example, a communication unit 106 and a memory 107 .
  • the communication unit 106 may be configured to communicate with the cell under the control of the processing circuit 101 .
  • the communication unit 106 may be implemented as a transmitter or transceiver, including communication components such as antenna arrays and/or radio frequency links.
  • the communication unit 106 is drawn in dashed lines, as it may also be located outside the electronic device 100 .
  • the communication unit 106 may receive cell pre-configuration information, beam activation information, and the like from the serving cell.
  • the communication unit 106 may also send beam reports generated by the reporting unit 103 .
  • Electronic device 100 may also include memory 107 .
  • the memory 107 may store various data and instructions, such as programs and data for the operation of the electronic device 100, various data generated by the processing circuit 101, data to be transmitted by the communication unit 106, and the like.
  • the memory 107 is drawn with dashed lines, as it may also be located within the processing circuit 101 or external to the electronic device 100 .
  • Memory 107 may be volatile memory and/or non-volatile memory.
  • memory 107 may include, but is not limited to, random access memory (RAM), dynamic random access memory (DRAM), static random access memory (SRAM), read only memory (ROM), flash memory.
  • FIG. 20A is a block diagram illustrating an electronic device 200 according to the present disclosure.
  • Electronic device 200 may be a base station or a component of a base station.
  • electronic device 200 includes processing circuit 201 .
  • the processing circuit 201 includes at least a receiving unit 202 , a determining unit 203 and a setting unit 204 .
  • the processing circuit 201 may be configured to perform the communication method shown in FIG. 20B.
  • Processing circuitry 201 may refer to various implementations of digital circuitry, analog circuitry, or mixed-signal (combination of analog and digital) circuitry that perform functions in a computing system.
  • Processing circuits may include, for example, circuits such as integrated circuits (ICs), application specific integrated circuits (ASICs), portions or circuits of individual processor cores, entire processor cores, individual processors, such as field programmable arrays (FPGAs). ), and/or a system including multiple processors.
  • ICs integrated circuits
  • ASICs application specific integrated circuits
  • FPGAs field programmable arrays
  • the receiving unit 202 of the processing circuit 201 is configured to receive a beam report on one or more non-serving cells from a user equipment (UE) through L1 or L2 uplink signaling, ie, perform step S201 in FIG. 20B .
  • the received beam report contains at least L1 measurement results and identification information of one or more beams of one or more non-serving cells.
  • the determining unit 203 is configured to determine an activated beam among the one or more beams, that is, to perform step S202 in FIG. 20B .
  • the determining unit 203 may determine the activated beam based at least on the L1 measurement result in the beam report. When the beam report contains only a beam of a non-serving cell, the determining unit 203 determines that the beam of the non-serving cell will be activated.
  • the setting unit 204 is configured to set the non-serving cell associated with the activated beam as the serving cell, that is, to perform step S203 in FIG. 20B .
  • the setting unit 204 may send a handover request to the activated non-serving cell, so that the UE is handed over to the non-serving cell.
  • the setting unit 204 may add the activated non-serving cell as the secondary serving cell in response to the recommendation of the UE.
  • the electronic device 200 may also include, for example, a communication unit 205 and a memory 206 .
  • the communication unit 205 may be configured to communicate with the UE under the control of the processing circuit 201 .
  • the communication unit 205 may be implemented as a transmitter or transceiver, including communication components such as antenna arrays and/or radio frequency links.
  • the communication unit 205 is drawn with a dashed line, as it may also be located outside the electronic device 200 .
  • the communication unit 205 may transmit beam activation information and the like to the UE.
  • the communication unit 205 may also receive beam reports and the like from the UE.
  • Electronic device 200 may also include memory 206 .
  • the memory 206 may store various data and instructions, such as programs and data for the operation of the electronic device 200, various data generated by the processing circuit 201, various control signaling or service data received by the communication unit 205, 205 data sent, etc.
  • Memory 206 is drawn in dashed lines, as it may also be located within processing circuit 201 or external to electronic device 200 .
  • Memory 206 may be volatile memory and/or non-volatile memory.
  • memory 206 may include, but is not limited to, random access memory (RAM), dynamic random access memory (DRAM), static random access memory (SRAM), read only memory (ROM), flash memory.
  • the units of the electronic devices 100 and 200 described in the above embodiments are only logical modules divided according to the specific functions implemented by them, and are not used to limit the specific implementation manner.
  • the above units may be implemented as independent physical entities, or may also be implemented by a single entity (eg, a processor (CPU or DSP, etc.), an integrated circuit, etc.).
  • an electronic device on the user side comprising:
  • processing circuitry configured as:
  • a beam report including at least L1 measurement results and identification information of one or more beams of one or more non-serving cells to the serving cell through L1 or L2 signaling;
  • the non-serving cell associated with the activated beam is set as the serving cell.
  • the cell pre-configuration information at least includes identification information of each cell and a reference signal corresponding to its beam.
  • the cell pre-configuration information includes common configuration parameters of all cells and configuration parameters specific to each cell.
  • the predetermined event based on the measurement includes at least one of the following:
  • the L1 measurement result of the reference signal of the serving cell is worse than the absolute threshold
  • the L1 measurement result of the reference signal of the non-serving cell is better than the L1 measurement result of the reference signal of the serving cell by an offset;
  • the L1 measurement result of the reference signal of the non-serving cell is better than the absolute threshold
  • the L1 measurement result of the reference signal of the serving cell is worse than an absolute threshold and the L1 measurement result of the reference signal of the non-serving cell is better than another absolute threshold;
  • the predetermined event based on the measurement includes at least one of the following:
  • the L3 measurement result of the reference signal of the serving cell is worse than the absolute threshold
  • the L3 measurement result of the reference signal of the non-serving cell is better than the L3 measurement result of the reference signal of the serving cell by an offset;
  • the L3 measurement result of the reference signal of the non-serving cell is better than the absolute threshold
  • the L3 measurement of the reference signal of the serving cell is worse than an absolute threshold and the L3 measurement of the reference signal of the non-serving cell is better than another absolute threshold.
  • the beam report further includes at least one of the following:
  • the type of measurement-based predetermined event is the type of measurement-based predetermined event.
  • the identification information of each beam in the one or more beams includes an index of a reference signal corresponding to the beam or a TCI citing the reference signal corresponding to the beam state.
  • the beam activation information indicating a beam of a non-serving cell that the serving cell decides to activate based on the beam report
  • an activated beam is determined.
  • the electronic device according to 1), wherein setting the non-serving cell associated with the activated beam as the serving cell comprises:
  • the non-serving cell associated with the activated beam is added as a secondary serving cell.
  • Beam indication information for the PDCCH or PDSCH is received from the non-serving cell associated with the activated beam through L1 or L2 signaling, the beam indication information indicating that the activated beam is used to receive the subsequent PDCCH or PDSCH.
  • the beam report is repeatedly sent up to a predetermined maximum number of transmissions before the successful transmission is confirmed.
  • an electronic device on the control side comprising:
  • processing circuitry configured as:
  • a beam report including at least L1 measurement results and identification information of one or more beams of one or more non-serving cells from a user equipment (UE) through L1 or L2 signaling;
  • UE user equipment
  • the non-serving cell associated with the activated beam is set as the serving cell.
  • a handover request is sent to the non-serving cell associated with the activated beam.
  • Cell pre-configuration information is sent to the UE, enabling the UE to measure beams transmitted by the serving cell and at least one non-serving cell based on the cell pre-configuration information.
  • a beam report including at least L1 measurement results and identification information of one or more beams of one or more non-serving cells to the serving cell through L1 or L2 signaling;
  • the non-serving cell associated with the activated beam is set as the serving cell.
  • a communication method comprising:
  • a beam report including at least L1 measurement results and identification information of one or more beams of one or more non-serving cells from a user equipment (UE) through L1 or L2 signaling;
  • UE user equipment
  • the non-serving cell associated with the activated beam is set as the serving cell.
  • a non-transitory computer-readable storage medium storing executable instructions that, when executed, implement the communication method of 18) or 19).
  • the electronic device 200 may be implemented as or installed in various base stations, and the electronic device 100 may be implemented as or installed in various user equipments.
  • Communication methods according to embodiments of the present disclosure may be implemented by various base stations or user equipment; methods and operations according to embodiments of the present disclosure may be embodied as computer-executable instructions, stored in non-transitory computer-readable storage media, and Can be performed by various base stations or user equipment to implement one or more of the functions described above.
  • Techniques according to embodiments of the present disclosure can be made into various computer program products that are used in various base stations or user equipment to implement one or more of the functions described above.
  • the base stations mentioned in this disclosure can be implemented as any type of base stations, preferably, such as macro gNB and ng-eNB as defined in the 5G NR standard of 3GPP.
  • a gNB may be a gNB covering a smaller cell than a macro cell, such as pico gNBs, micro gNBs, and home (femto) gNBs.
  • the base station may be implemented as any other type of base station, such as NodeB, eNodeB, and base transceiver station (BTS).
  • the base station may also include a subject configured to control wireless communications and one or more remote radio heads (RRHs), wireless relay stations, drone towers, control nodes in automated factories, etc., located at a different location than the subject.
  • RRHs remote radio heads
  • User equipment may be implemented as mobile terminals such as smart phones, tablet personal computers (PCs), notebook PCs, portable game terminals, portable/dongle-type mobile routers, and digital cameras or vehicle-mounted terminals such as car navigation devices.
  • User equipment may also be implemented as terminals performing machine-to-machine (M2M) communications (also known as machine-type communication (MTC) terminals), drones, sensors and actuators in automated factories, and the like.
  • M2M machine-to-machine
  • MTC machine-type communication
  • the user equipment may be a wireless communication module (such as an integrated circuit module comprising a single die) mounted on each of the aforementioned terminals.
  • base station as used in this disclosure has the full breadth of its ordinary meaning and includes at least a wireless communication station used as a wireless communication system or part of a radio system to facilitate communication.
  • base stations may be, for example, but not limited to the following: one or both of a base transceiver station (BTS) and a base station controller (BSC) in a GSM communication system; a radio network controller (RNC) in a 3G communication system One or both of NodeBs and NodeBs; eNBs in 4G LTE and LTE-A systems; gNBs and ng-eNBs in 5G communication systems.
  • BTS base transceiver station
  • BSC base station controller
  • RNC radio network controller
  • a logical entity with a control function for communication may also be called a base station.
  • the logical entity that plays the role of spectrum coordination can also be called a base station.
  • a logical entity that provides network control functions can be referred to as a base station.
  • FIG. 21 is a block diagram showing a first example of a schematic configuration of a base station to which the techniques of the present disclosure can be applied.
  • the base station may be implemented as gNB 1400.
  • gNB 1400 includes multiple antennas 1410 and base station equipment 1420.
  • the base station apparatus 1420 and each antenna 1410 may be connected to each other via an RF cable.
  • the gNB 1400 (or the base station device 1420) here may correspond to the above-mentioned electronic device 200.
  • Antenna 1410 includes multiple antenna elements, such as multiple antenna arrays for massive MIMO.
  • the antennas 1410 may, for example, be arranged in an antenna array matrix and used for the base station apparatus 1420 to transmit and receive wireless signals.
  • multiple antennas 1410 may be compatible with multiple frequency bands used by gNB 1400.
  • the base station apparatus 1420 includes a controller 1421 , a memory 1422 , a network interface 1423 , and a wireless communication interface 1425 .
  • the controller 1421 may be, for example, a CPU or a DSP, and operates various functions of a higher layer of the base station apparatus 1420 .
  • the controller 1421 may include the processing circuit 201 described above, perform the communication method described in FIG. 20B , or control various components of the electronic device 200 .
  • the controller 1421 generates data packets from the data in the signal processed by the wireless communication interface 1425, and communicates the generated packets via the network interface 1423.
  • the controller 1421 may bundle data from a plurality of baseband processors to generate bundled packets, and deliver the generated bundled packets.
  • the controller 1421 may have logical functions to perform controls such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. This control can be performed in conjunction with nearby gNB or core network nodes.
  • the memory 1422 includes RAM and ROM, and stores programs executed by the controller 1421 and various types of control data such as a terminal list, transmission power data, and scheduling data.
  • the network interface 1423 is a communication interface for connecting the base station apparatus 1420 to the core network 1424 (eg, a 5G core network).
  • the controller 1421 may communicate with core network nodes or further gNBs via the network interface 1423 .
  • gNB 1400 and core network nodes or other gNBs may be connected to each other through logical interfaces such as NG interface and Xn interface.
  • the network interface 1423 may also be a wired communication interface or a wireless communication interface for wireless backhaul. If the network interface 1423 is a wireless communication interface, the network interface 1423 may use a higher frequency band for wireless communication than the frequency band used by the wireless communication interface 1425 .
  • Wireless communication interface 1425 supports any cellular communication scheme, such as 5G NR, and provides wireless connectivity to terminals located in the cell of gNB 1400 via antenna 1410.
  • the wireless communication interface 1425 may generally include, for example, a baseband (BB) processor 1426 and RF circuitry 1427 .
  • the BB processor 1426 may perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signals of various layers (eg, physical layer, MAC layer, RLC layer, PDCP layer, SDAP layer) deal with.
  • the BB processor 1426 may have some or all of the above-described logical functions.
  • the BB processor 1426 may be a memory storing a communication control program, or a module including a processor and associated circuitry configured to execute the program.
  • the update procedure may cause the functionality of the BB processor 1426 to change.
  • the module may be a card or blade that is inserted into a slot of the base station device 1420. Alternatively, the module can also be a chip mounted on a card or blade.
  • the RF circuit 1427 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via the antenna 1410 .
  • FIG. 21 shows an example in which one RF circuit 1427 is connected to one antenna 1410, the present disclosure is not limited to this illustration, but one RF circuit 1427 may be connected to a plurality of antennas 1410 at the same time.
  • the wireless communication interface 1425 may include a plurality of BB processors 1426.
  • multiple BB processors 1426 may be compatible with multiple frequency bands used by gNB 1400.
  • the wireless communication interface 1425 may include a plurality of RF circuits 1427 .
  • multiple RF circuits 1427 may be compatible with multiple antenna elements.
  • FIG. 21 shows an example in which the wireless communication interface 1425 includes multiple BB processors 1426 and multiple RF circuits 1427 , the wireless communication interface 1425 may include a single BB processor 1426 or a single RF circuit 1427 .
  • one or more units included in the processing circuit 201 described with reference to FIG. 20A may be implemented in the wireless communication interface 1425.
  • the controller 1421 may be implemented in the controller 1421 .
  • gNB 1400 includes a portion (eg, BB processor 1426) or the entirety of wireless communication interface 1425, and/or a module including controller 1421, and one or more components may be implemented in the module.
  • the module may store and execute a program for allowing the processor to function as one or more components (in other words, a program for allowing the processor to perform the operations of the one or more components).
  • a program for allowing a processor to function as one or more components may be installed in gNB 1400, and wireless communication interface 1425 (eg, BB processor 1426) and/or controller 1421 may execute the program.
  • the gNB 1400, the base station apparatus 1420, or a module may be provided as an apparatus including one or more components, and a program for allowing a processor to function as the one or more components may be provided.
  • a readable medium in which the program is recorded may be provided.
  • FIG. 22 is a block diagram showing a second example of a schematic configuration of a base station to which the technology of the present disclosure can be applied.
  • the base station is shown as gNB 1530.
  • gNB 1530 includes multiple antennas 1540, base station equipment 1550 and RRH 1560.
  • the RRH 1560 and each antenna 1540 may be connected to each other via an RF cable.
  • the base station apparatus 1550 and the RRH 1560 may be connected to each other via a high-speed line such as an optical fiber cable.
  • the gNB 1530 (or the base station device 1550 ) here may correspond to the electronic device 200 described above.
  • Antenna 1540 includes multiple antenna elements, such as multiple antenna arrays for massive MIMO.
  • the antennas 1540 may be arranged in an antenna array matrix, for example, and used for the base station apparatus 1550 to transmit and receive wireless signals.
  • multiple antennas 1540 may be compatible with multiple frequency bands used by gNB 1530.
  • the base station apparatus 1550 includes a controller 1551 , a memory 1552 , a network interface 1553 , a wireless communication interface 1555 , and a connection interface 1557 .
  • the controller 1551 , the memory 1552 and the network interface 1553 are the same as the controller 1421 , the memory 1422 and the network interface 1423 described with reference to FIG. 21 .
  • Wireless communication interface 1555 supports any cellular communication scheme, such as 5G NR, and provides wireless communication via RRH 1560 and antenna 1540 to terminals located in a sector corresponding to RRH 1560.
  • Wireless communication interface 1555 may generally include, for example, BB processor 1556 .
  • the BB processor 1556 is the same as the BB processor 1426 described with reference to FIG. 21, except that the BB processor 1556 is connected to the RF circuit 1564 of the RRH 1560 via the connection interface 1557.
  • the wireless communication interface 1555 may include a plurality of BB processors 1556.
  • multiple BB processors 1556 may be compatible with multiple frequency bands used by gNB 1530.
  • FIG. 22 shows an example in which the wireless communication interface 1555 includes multiple BB processors 1556
  • the wireless communication interface 1555 may include a single BB processor 1556 .
  • connection interface 1557 is an interface for connecting the base station apparatus 1550 (the wireless communication interface 1555 ) to the RRH 1560.
  • the connection interface 1557 may also be a communication module for communication in the above-mentioned high-speed line connecting the base station device 1550 (the wireless communication interface 1555) to the RRH 1560.
  • RRH 1560 includes connection interface 1561 and wireless communication interface 1563.
  • connection interface 1561 is an interface for connecting the RRH 1560 (the wireless communication interface 1563 ) to the base station apparatus 1550.
  • the connection interface 1561 may also be a communication module for communication in the above-mentioned high-speed line.
  • the wireless communication interface 1563 transmits and receives wireless signals via the antenna 1540 .
  • Wireless communication interface 1563 may typically include RF circuitry 1564, for example.
  • RF circuitry 1564 may include, for example, mixers, filters, and amplifiers, and transmit and receive wireless signals via antenna 1540 .
  • FIG. 22 shows an example in which one RF circuit 1564 is connected to one antenna 1540, the present disclosure is not limited to this illustration, but one RF circuit 1564 may be connected to a plurality of antennas 1540 at the same time.
  • the wireless communication interface 1563 may include a plurality of RF circuits 1564.
  • multiple RF circuits 1564 may support multiple antenna elements.
  • FIG. 22 shows an example in which the wireless communication interface 1563 includes a plurality of RF circuits 1564 , the wireless communication interface 1563 may include a single RF circuit 1564 .
  • one or more units included in the processing circuit 201 described with reference to FIG. 20A may be implemented in the wireless communication interface 1525.
  • the controller 1521 may be implemented in the controller 1521 .
  • gNB 1500 includes a portion (eg, BB processor 1526) or the entirety of wireless communication interface 1525, and/or a module including controller 1521, and one or more components may be implemented in the module.
  • the module may store and execute a program for allowing the processor to function as one or more components (in other words, a program for allowing the processor to perform the operations of the one or more components).
  • a program for allowing a processor to function as one or more components may be installed in gNB 1500, and wireless communication interface 1525 (eg, BB processor 1526) and/or controller 1521 may execute the program.
  • the gNB 1500, the base station apparatus 1520, or a module may be provided as an apparatus including one or more components, and a program for allowing a processor to function as the one or more components may be provided.
  • a readable medium in which the program is recorded may be provided.
  • FIG. 23 is a block diagram showing an example of a schematic configuration of a smartphone 1600 to which the techniques of the present disclosure can be applied.
  • the smartphone 1600 may be implemented as the electronic device 100 described with reference to FIG. 19A.
  • Smartphone 1600 includes processor 1601, memory 1602, storage device 1603, external connection interface 1604, camera device 1606, sensor 1607, microphone 1608, input device 1609, display device 1610, speaker 1611, wireless communication interface 1612, one or more Antenna switch 1615 , one or more antennas 1616 , bus 1617 , battery 1618 , and auxiliary controller 1619 .
  • the processor 1601 may be, for example, a CPU or a system on a chip (SoC), and controls the functions of the application layer and further layers of the smartphone 1600 .
  • the processor 1601 may include or function as the processing circuit 101 described with reference to FIG. 19A.
  • the memory 1602 includes RAM and ROM, and stores data and programs executed by the processor 1601 .
  • the storage device 1603 may include storage media such as semiconductor memories and hard disks.
  • the external connection interface 1604 is an interface for connecting an external device such as a memory card and a Universal Serial Bus (USB) device to the smartphone 1600 .
  • USB Universal Serial Bus
  • the camera 1606 includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image.
  • Sensors 1607 may include a set of sensors such as measurement sensors, gyroscope sensors, geomagnetic sensors, and acceleration sensors.
  • the microphone 1608 converts the sound input to the smartphone 1600 into an audio signal.
  • the input device 1609 includes, for example, a touch sensor, a keypad, a keyboard, buttons, or switches configured to detect a touch on the screen of the display device 1610, and receives operations or information input from a user.
  • the display device 1610 includes a screen such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smartphone 1600 .
  • the speaker 1611 converts the audio signal output from the smartphone 1600 into sound.
  • the wireless communication interface 1612 supports any cellular communication scheme (such as 4G LTE or 5G NR, etc.), and performs wireless communication.
  • Wireless communication interface 1612 may typically include, for example, BB processor 1613 and RF circuitry 1614.
  • the BB processor 1613 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signal processing for wireless communication.
  • the RF circuit 1614 may include, for example, mixers, filters, and amplifiers, and transmit and receive wireless signals via the antenna 1616 .
  • the wireless communication interface 1612 may be a chip module on which the BB processor 1613 and the RF circuit 1614 are integrated. As shown in FIG.
  • the wireless communication interface 1612 may include a plurality of BB processors 1613 and a plurality of RF circuits 1614 .
  • FIG. 23 shows an example in which the wireless communication interface 1612 includes multiple BB processors 1613 and multiple RF circuits 1614, the wireless communication interface 1612 may include a single BB processor 1613 or a single RF circuit 1614.
  • the wireless communication interface 1612 may support additional types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless local area network (LAN) schemes.
  • the wireless communication interface 1612 may include the BB processor 1613 and the RF circuit 1614 for each wireless communication scheme.
  • Each of the antenna switches 1615 switches the connection destination of the antenna 1616 among a plurality of circuits included in the wireless communication interface 1612 (eg, circuits for different wireless communication schemes).
  • Antenna 1616 includes multiple antenna elements, such as multiple antenna arrays for massive MIMO. Antennas 1616 may be arranged, for example, in an antenna array matrix and used for wireless communication interface 1612 to transmit and receive wireless signals. Smartphone 1600 may include one or more antenna panels (not shown).
  • the smartphone 1600 may include an antenna 1616 for each wireless communication scheme.
  • the antenna switch 1615 can be omitted from the configuration of the smartphone 1600 .
  • the bus 1617 connects the processor 1601, the memory 1602, the storage device 1603, the external connection interface 1604, the camera 1606, the sensor 1607, the microphone 1608, the input device 1609, the display device 1610, the speaker 1611, the wireless communication interface 1612, and the auxiliary controller 1619 to each other connect.
  • the battery 1618 provides power to the various blocks of the smartphone 1600 shown in FIG. 23 via feeders, which are partially shown in phantom in the figure.
  • the auxiliary controller 1619 operates the minimum necessary functions of the smartphone 1600, eg, in sleep mode.
  • one or more components included in the processing circuit 101 described with reference to FIG. 19A may be implemented in the wireless communication interface 1612 .
  • at least some of these components may be implemented in processor 1601 or auxiliary controller 1619 .
  • smartphone 1600 includes a portion (eg, BB processor 1613 ) or the entirety of wireless communication interface 1612, and/or a module including processor 1601 and/or auxiliary controller 1619, and one or more components may be implemented in this module.
  • the module may store and execute a program that allows the processor to function as one or more components (in other words, a program for allowing the processor to perform the operations of the one or more components).
  • a program for allowing a processor to function as one or more components may be installed in smartphone 1600, and wireless communication interface 1612 (eg, BB processor 1613), processor 1601 and/or auxiliary
  • the controller 1619 can execute the program.
  • a smartphone 1600 or a module may be provided as an apparatus including one or more components, and a program for allowing a processor to function as the one or more components may be provided.
  • a readable medium in which the program is recorded may be provided.
  • FIG. 24 is a block diagram showing an example of a schematic configuration of a car navigation apparatus 1720 to which the technology of the present disclosure can be applied.
  • the car navigation device 1720 may be implemented as the electronic device 100 described with reference to FIG. 19A .
  • the car navigation device 1720 includes a processor 1721, a memory 1722, a global positioning system (GPS) module 1724, a sensor 1725, a data interface 1726, a content player 1727, a storage medium interface 1728, an input device 1729, a display device 1730, a speaker 1731, a wireless A communication interface 1733 , one or more antenna switches 1736 , one or more antennas 1737 , and a battery 1738 .
  • GPS global positioning system
  • the processor 1721 may be, for example, a CPU or a SoC, and controls the navigation function and other functions of the car navigation device 1720 .
  • the memory 1722 includes RAM and ROM, and stores data and programs executed by the processor 1721 .
  • the GPS module 1724 measures the position (such as latitude, longitude, and altitude) of the car navigation device 1720 using GPS signals received from GPS satellites.
  • Sensors 1725 may include a set of sensors, such as gyroscope sensors, geomagnetic sensors, and air pressure sensors.
  • the data interface 1726 is connected to, for example, the in-vehicle network 1741 via a terminal not shown, and acquires data generated by the vehicle, such as vehicle speed data.
  • the content player 1727 reproduces content stored in storage media such as CDs and DVDs, which are inserted into the storage media interface 1728 .
  • the input device 1729 includes, for example, a touch sensor, a button, or a switch configured to detect a touch on the screen of the display device 1730, and receives operations or information input from a user.
  • the display device 1730 includes a screen such as an LCD or OLED display, and displays images or reproduced content of a navigation function.
  • the speaker 1731 outputs the sound of the navigation function or the reproduced content.
  • the wireless communication interface 1733 supports any cellular communication scheme, such as 4G LTE or 5G NR, and performs wireless communication.
  • Wireless communication interface 1733 may generally include, for example, BB processor 1734 and RF circuitry 1735.
  • the BB processor 1734 may perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signal processing for wireless communication.
  • the RF circuit 1735 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via the antenna 1737 .
  • the wireless communication interface 1733 can also be a chip module on which the BB processor 1734 and the RF circuit 1735 are integrated. As shown in FIG.
  • the wireless communication interface 1733 may include a plurality of BB processors 1734 and a plurality of RF circuits 1735 .
  • FIG. 24 shows an example in which the wireless communication interface 1733 includes multiple BB processors 1734 and multiple RF circuits 1735, the wireless communication interface 1733 may include a single BB processor 1734 or a single RF circuit 1735.
  • the wireless communication interface 1733 may support another type of wireless communication scheme, such as a short-range wireless communication scheme, a near field communication scheme, and a wireless LAN scheme.
  • the wireless communication interface 1733 may include the BB processor 1734 and the RF circuit 1735 for each wireless communication scheme.
  • Each of the antenna switches 1736 switches the connection destination of the antenna 1737 among a plurality of circuits included in the wireless communication interface 1733, such as circuits for different wireless communication schemes.
  • Antenna 1737 includes multiple antenna elements, such as multiple antenna arrays for massive MIMO.
  • the antennas 1737 may be arranged in an antenna array matrix, for example, and used for the wireless communication interface 1733 to transmit and receive wireless signals.
  • the car navigation device 1720 may include an antenna 1737 for each wireless communication scheme.
  • the antenna switch 1736 may be omitted from the configuration of the car navigation apparatus 1720 .
  • the battery 1738 provides power to the various blocks of the car navigation device 1720 shown in FIG. 24 via feeders, which are partially shown as dashed lines in the figure.
  • the battery 1738 accumulates power supplied from the vehicle.
  • one or more components included in the processing circuit 101 described with reference to FIG. 19A may be implemented in the wireless communication interface 1733 .
  • at least some of these components may be implemented in the processor 1721 .
  • car navigation device 1720 includes a portion (eg, BB processor 1734) or the entirety of wireless communication interface 1733, and/or a module including processor 1721, and one or more components may be implemented in the module.
  • the module may store and execute a program that allows the processor to function as one or more components (in other words, a program for allowing the processor to perform the operations of the one or more components).
  • a program for allowing the processor to function as one or more components may be installed in the car navigation device 1720, and the wireless communication interface 1733 (eg, the BB processor 1734) and/or the processor 1721 may be installed Execute the program.
  • the car navigation device 1720 or a module may be provided, and a program for allowing a processor to function as the one or more components may be provided.
  • a readable medium in which the program is recorded may be provided.
  • the communication unit 106 described with reference to FIG. 19A may be implemented in the wireless communication interface 1933 (for example, the RF circuit 1935).
  • the techniques of the present disclosure may also be implemented as an in-vehicle system (or vehicle) 1740 that includes one or more blocks of a car navigation device 1720 , an in-vehicle network 1741 , and a vehicle module 1742 .
  • the vehicle module 1742 generates vehicle data such as vehicle speed, engine speed, and fault information, and outputs the generated data to the in-vehicle network 1741 .
  • a plurality of functions included in one unit in the above embodiments may be implemented by separate devices.
  • multiple functions implemented by multiple units in the above embodiments may be implemented by separate devices, respectively.
  • one of the above functions may be implemented by multiple units. Needless to say, such a configuration is included in the technical scope of the present disclosure.
  • the steps described in the flowcharts include not only processing performed in time series in the stated order, but also processing performed in parallel or individually rather than necessarily in time series. Furthermore, even in the steps processed in time series, needless to say, the order can be appropriately changed.

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Abstract

本公开涉及无线通信系统中的电子设备、通信方法和存储介质。提供了一种用户侧的电子设备，包括处理电路，其被配置为：基于小区预配置信息，测量由服务小区和至少一个非服务小区发射的波束；响应于基于测量的预定事件，通过L1或L2信令向服务小区发送至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；确定所述一个或多个波束中被激活的波束；以及设置与被激活的波束相关联的非服务小区作为服务小区。

Description

电子设备、通信方法和存储介质 技术领域
本公开总体上涉及无线通信领域，更具体地，涉及无线通信系统中用于基于层1或层2的小区间移动性管理的电子设备、通信方法和存储介质。
背景技术
作为当前最先进的无线通信标准，5G NR(New Radio，新无线电)利用更高的频段(例如，被称为sub-6频段的FR1和位于毫米波频段的FR2)来提供更高的通信速率和系统容量。此外，通过使用波束赋形(Beamforming)技术，可以形成较窄的指向性波束来对抗高频信道中存在的较大的路径损耗，并通过部署多波束来实现小区覆盖。
由于更高频段和波束赋形的使用，小区和每个波束的覆盖范围变得有限。当用户设备(UE)发生移动时，保证通信的连续性需要NR通信系统进行更高效的移动性管理。在3GPP Rel.15/16的标准化过程中，定义了小区内移动性(intra-cell mobility)和小区间移动性(inter-cell mobility)的管理机制。对于小区内移动性，通过层1(即物理层)的波束管理的方式来完成，其中L1的波束管理包括UE侧的波束测量、上报和波束指示。
对于小区间移动性，则是采用层3(即RRC层)的方式来完成。图1简单示出了小区切换的流程图。如图1中所示，服务小区提前利用RRC信令为UE配置本小区和邻近小区的关于移动性的参考信号(RS)，UE对这些参考信号进行层3的滤波和测量以得到一个相对平均的、收敛的测量结果，并在触发预定的层3事件之后进行无线电资源管理(RRM)相关上报。服务小区基于上报的内容进行切换决策，并向决策的目标小区发送切换请求。目标小区执行准入控制，并提供RRC配置作为切换请求确认(ACK)的一部分。然后，服务小区向UE发送RRC重配置(RRCReconfiguration)消息，将目标小区的RRC配置提供给该UE。UE调整好配置的RRC参数，准备接入目标小区。同样，这里也是使用层3信令，即给目标小区发送RRC重配置完成(RRCReconfigurationComplete)消息从而UE切换到目标小区。
在UE的控制平面(负责移动性管理)协议栈结构中，层3在层1之上，需要层1的传输信道来承载，因此层3的信令开销和时延都较大。对于高速移动场景或者对时延要求比较高的场景，传统的小区间移动性管理已经难以满足UE的需求。
因此，存在改进现有的小区间移动性管理机制的需求。
发明内容
本公开提供了多个方面，以满足上述需求。本公开提出了基于层1或层2信令的跨小区波束管理机制，从而实现更加快速、高效的小区间移动性管理。
在下文中给出了关于本公开的简要概述，以便提供关于本公开的一些方面的基本理解。但是，应当理解，这个概述并不是关于本公开的穷举性概述。它并不是意图用来确定本公开的关键性部分或重要部分，也不是意图用来限定本公开的范围。其目的仅仅是以简化的形式给出关于本公开的某些概念，以此作为稍后给出的更详细描述的前序。
根据本公开的一个方面，提供了一种用户侧的电子设备，包括处理电路，其被配置为：基于小区预配置信息，测量由服务小区和至少一个非服务小区发射的波束；响应于基于测量的预定事件，通过L1或L2信令向服务小区发送至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；确定所述一个或多个波束中被激活的波束；以及设置与被激活的波束相关联的非服务小区作为服务小区。
根据本公开的一个方面，提供了一种控制侧的电子设备，包括处理电路，其被配置为：通过L1或L2信令从用户设备(UE)接收至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；确定所述一个或多个波束中被激活的波束；以及设置与被激活的波束相关联的非服务小区作为服务小区。
根据本公开的一个方面，提供了一种通信方法，包括：基于小区预配置信息，测量由服务小区和至少一个非服务小区发射的波束；响应于基于测量的预定事件，通过L1或L2信令向服务小区发送至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；确定所述一个或多个波束中被激活的波束；以及设置与被激活的波束相关联的非服务小区作为服务小区。
根据本公开的一个方面，提供了一种通信方法，包括：通过L1或L2信令从用户设 备(UE)接收至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；确定所述一个或多个波束中被激活的波束；以及设置与被激活的波束相关联的非服务小区作为服务小区。
根据本公开的一个方面，提供了一种存储有可执行指令的非暂时性计算机可读存储介质，所述可执行指令当被执行时实现上面的任一个通信方法。
附图说明
本公开可以通过参考下文中结合附图所给出的详细描述而得到更好的理解，其中在所有附图中使用了相同或相似的附图标记来表示相同或者相似的要素。所有附图连同下面的详细说明一起包含在本说明书中并形成说明书的一部分，用来进一步举例说明本公开的实施例和解释本公开的原理和优点。其中：
图1示出了传统的小区切换的流程图；
图2示出了NR通信系统的体系架构的简化示图；
图3示出了双连接下、利用载波聚合(CA)的各种小区；
图4A和4B分别是用户平面和控制平面的NR无线电协议架构；
图5示出了根据本公开的小区间移动性管理的流程示意图；
图6示出了小区间移动性的示意性场景；
图7示出了用于配置小区组的CellGroupConfig信息元素；
图8例示了TCI状态的配置；
图9A和9B示出了小区预配置信息的配置方式；
图10示出了波束测量模型的示意图；
图11和图12示出了波束报告格式的示例；
图13示出了UE设置非服务小区作为SCell的示意图；
图14A和14B示出了用于激活SCell的MAC CE的示例；
图15A-15B示出了直接的波束指示的示意图；
图16A-16C示出了非直接的波束指示的示意图；
图17示出了小区间移动性管理的信令流程的示例；
图18示出了小区间移动性管理的信令流程的另一示例；
图19A和19B是例示了根据本公开的用于UE侧的电子设备及其通信方法；
图20A和20B是例示了根据本公开的用于网络控制侧的电子设备及其通信方法；
图21例示了根据本公开的基站的示意性配置的第一示例；
图22例示了根据本公开的基站的示意性配置的第二示例；
图23例示了根据本公开的智能电话的示意性配置示例；
图24例示了根据本公开的汽车导航设备的示意性配置示例。
通过参照附图阅读以下详细描述，本公开的特征和方面将得到清楚的理解。
具体实施方式
在下文中将参照附图来详细描述本公开的各种示例性实施例。为了清楚和简明起见，在本说明书中并未描述实施例的所有特征。然而应注意，在实现本公开的实施例时可以根据特定需求做出很多特定于实现方式的设置，以便实现开发人员的具体目标，例如，符合与设备及业务相关的限制条件，并且这些限制条件可能会随着实现方式的不同而有所改变。此外，还应该了解，虽然开发工作有可能是较复杂和费事的，但对得益于本公开内容的本领域技术人员来说，这种开发公开仅仅是例行的任务。
此外，还应注意，为了避免因不必要的细节而模糊了本公开，在附图中仅仅示出了与至少根据本公开的技术方案密切相关的处理步骤和/或设备结构，而省略了与本公开关系不大的其他细节。以下对于示例性实施例的描述仅仅是说明性的，不意在作为对本公开及其应用的任何限制。
为了方便解释本公开的技术方案，下面将在5G NR的背景下描述本公开的各个方面。但是应注意，这不是对本公开的应用范围的限制，本公开的一个或多个方面还可 以被应用于例如4G LTE/LTE-A等已经普遍使用的无线通信系统，或者将来发展的各种无线通信系统。下面的描述中提及的架构、实体、功能、过程等并非局限于NR通信系统中的那些，而可以在其它的通信标准中找到对应。
【系统概述】
图2是示出了NR通信系统的体系架构的简化示图。如图2中所示，在网络侧，NR通信系统的无线接入网(NG-RAN)节点包括gNB和ng-eNB，其中gNB是在5G NR通信标准中新定义的节点，其经由NG接口连接到5G核心网(5GC)，并且提供与终端设备(也可称为“用户设备”，下文中简称为“UE”)终接的NR用户平面和控制平面协议；ng-eNB是为了与4G LTE通信系统兼容而定义的节点，其可以是LTE无线接入网的演进型节点B(eNB)的升级，经由NG接口连接设备到5G核心网，并且提供与UE终接的演进通用陆地无线接入(E-UTRA)用户平面和控制平面协议。下文中将gNB和ng-eNB统称为“基站”。
但是应注意，本公开中所使用的术语“基站”不仅限于上面这两种节点，而是作为网络侧的控制设备的示例，并具有其通常含义的全部广度。例如，除了5G通信标准中规定的gNB和ng-eNB之外，取决于本公开的技术方案被应用的场景，“基站”例如还可以是LTE通信系统中的eNB、远程无线电头端、无线接入点、自动化工厂中的控制节点或者执行类似功能的通信装置。后面的章节将详细描述基站的应用示例。
另外，在本公开中，术语“UE”具有其通常含义的全部广度，包括与基站通信的各种终端设备或车载设备。作为例子，UE例如可以是移动电话、膝上型电脑、平板电脑、车载通信设备、自动化工厂中的传感器和执行器等之类的终端设备或其元件。后面的章节将详细描述UE的应用示例。
基站的覆盖范围可以称为“小区(cell)”。本公开中所使用的“小区”包括各种类型的小区，例如，取决于基站的发射功率和覆盖范围，小区可以包括宏小区、微小区、微微小区、家庭小区等。小区通常由物理小区标识符(PCI)标识。
典型地，基站与宏小区一一对应，但是也可能存在基站与小区的其它对应关系。例如，图3示出了在双连接(Dual Connectivity)下的小区示例。在双连接下，UE同时接入作为主节点(Master Node，MN)的基站和作为辅节点(Secondary Node， SN)的基站，主节点充当控制平面锚点，例如可以是4G基站。此外，如果使用载波聚合，一个基站可以同时使用多个分量载波(CC)来为UE提供数据传输，每个分量载波可以对应于一个小区。由主节点提供的小区构成主小区组(MCG)，其中主载波和辅载波分别被称为PCell和SCell。由辅节点提供的小区构成辅小区组(SCG)，其中主载波和辅载波分别被称为PSCell和SCell。因为很多控制信令只在PCell和PSCell上发送，为了描述方便，协议中将它们统称为特殊小区(sPCell)。
从UE的角度看，正在为其提供通信服务的小区可以称为服务小区(Serving Cell，SC)，相应地，没有为其提供通信服务的小区可以称为非服务小区(Non-Serving Cell，NSC)。在本公开中，主要讨论UE的服务小区与非服务小区之间的移动性，并主要以小区切换为例进行描述。在载波聚合的场景下，所谓的小区切换一般是将主小区PCell切换为其它小区。然而，应理解，本公开适用的小区间移动性还可能包括添加非服务小区作为UE的辅服务小区SCell。从更广义上讲，小区间移动性管理涉及UE的服务小区的改变。
此外，当在本公开中描述小区的行为时，虽然这些行为实际上是由对应的基站完成的，但是为了便于理解，常常可互换地使用“小区”和“基站”。
接下来参照图4A和4B来解说用于图2中的基站和UE的NR无线电协议架构。图4A示出了用于UE和gNB的用户平面的无线电协议栈，图4B示出了用于UE和gNB的控制平面的无线电协议栈。无线电协议栈被示为具有三层：层1、层2和层3。
作为最低层的层1(L1)也被称为物理层，实现各种物理层信号处理以提供信号的透明传输。L1为上面的各层提供物理传输信道。
层2(L2)在物理层之上并且负责UE与基站之间在物理层之上的链路。在用户平面和控制平面中，L2包括介质接入控制(MAC)子层、无线电链路控制(RLC)子层、以及分组数据汇聚协议(PDCP)子层，它们在网络侧终接于基站(ng-eNB、gNB)处、在用户侧终接于UE处。在用户平面中，UE和基站中还包括业务数据适配协议(SDAP)子层。在层2中，只有MAC子层与移动性管理有关，因此在本公开中提到的层2主要是指MAC子层。特别地，MAC子层负责在各UE间分配一个蜂窝小区中的各种无线电资源(例如，资源块)。
在控制平面中，UE和基站中还包括层3(L3)，即无线电资源控制(RRC)层。RRC层负责获得无线电资源(即，无线电承载)以及负责使用基站与UE之间的RRC信令来配置各下层。另外，UE与核心网(AMF)中的非接入层(NAS)控制协议执行例如认证、移动性管理、安全控制等功能。
为了支持MIMO技术的应用，基站和UE均具有许多天线，例如几十根、几百根甚至上千根。对于天线模型，一般围绕天线定义了三层的映射关系，使其能够顺利承接信道模型和通信标准。
最底层是最基本的物理单元——天线(也可以称为天线阵元)。每个天线阵元按照各自的幅度参数和相位参数辐射电磁波。
天线阵元按照矩阵的形式被布置成一个或多个天线阵列，一个天线阵列可以由整行、整列、多行、多列的天线阵元构成。在这一层，每个天线阵列实际上构成一个可独立配置的收发单元(TXRU)。通过配置组成该TXRU的天线阵元的幅度参数和/或相位参数，实现对该TXRU天线图样的调整，使其所有天线阵元发射的电磁波辐射形成指向特定空间方向的较窄的波束，即，实现波束赋形。
最后，一个或多个TXRU通过逻辑映射构成系统层面上看到的天线端口(Antenna Port)。“天线端口”被定义为使得运送某个天线端口上的符号的信道可以从运送同一天线端口上的另一符号的信道推断出。这意味着，同一天线端口传输的不同信号所经历的信道环境一样。
一般而言，天线端口可以由参考信号表征。天线端口与参考信号之间存在一一对应的关系，不同的天线端口用于发送不同的参考信号。参考信号例如包括：信道状态信息参考信号(CSI-RS)、DM-RS等等。此外，在波束管理中，同步信号块(SSB)与CSI-RS等参考信号起到类似的作用，因此在本公开中也可归于参考信号。
在不同的天线端口之间可以存在准共址(quasi-co-located，QCL)的关系。如果运送一个天线端口上的符号的信道的大尺度性质可以从运送另一个天线端口上的符号的信道推断出，则认为这两个天线端口是准共址的。这意味着，当例如天线端口A和天线端口B之间满足QCL关系时，从天线端口A上的信号估计得到的信道大尺度性质参数同样适合于天线端口B上的信号。大尺度性质包括以下至少之一：时延扩展、 多普勒扩展、多普勒频移、平均增益、平均延迟和空间接收参数等。在这种意义上，天线端口可以看作物理信道或物理信号的一种基于空口环境的标识，相同的天线端口信道环境变化大致一样。
如本公开中所使用的，“空间接收参数”包括用于形成接收波束的波束赋形参数，以对来自于对应的空间方向的波束信号实现最佳接收。相应地，“空间发射参数”包括用于形成指向特定空间方向的发射波束的波束赋形参数。空间接收参数和空间发射参数可以分别体现为空间域接收滤波器和空间域发射滤波器。在本公开中，为了便于说明，有时候不对发射波束和接收波束做区分，将统一称为“波束”。
随着无线信道环境的变化，基站和UE使用的波束也可能需要随之变化。在5G NR中，基站和UE通过执行波束扫描来确定将被用于数据传输的波束。以下行扫描为例，基站可以依次用nt个波束发送nr个参考信号，从而共发送nt×nr个参考信号，而UE可以用nr个波束接收这些参考信号并对其进行测量，例如得到L1-RSRP、L1-SINR等，并上报预定数量(例如2、4)个测量结果最好的参考信号。基站可以从这些上报的参考信号中选择一个，并指示给UE。由此，用于发送该参考信号的基站波束和用于接收该参考信号的UE波束将被确定为用于后续数据传输的最佳波束对。上行扫描的原理类似。
当UE在小区内移动时，可以通过上述波束扫描过程来选择当前最适合信道状况的基站波束-UE波束对，使得发射波束对准信道离开角(AOD)并且接收波束对准信道到达角(AOA)。因此，小区内移动性管理可以通过管理波束来实现。上述波束管理主要采用L1或L2的信令，从而灵活、快速地适应无线信道的变化。
相比之下，如前面的部分所介绍的，小区间移动性管理主要依赖于层3的信号测量和RRC信令的传递。L3的测量需要较长时间的滤波来得到收敛的结果，并且RRC信令的编解码和传递需要更多的处理资源和传输资源，因此对于高速移动中的UE或要求低时延的UE来说是不合适的。
有鉴于此，本公开设想基于L1和L2的小区间移动性管理机制。这需要摈弃现有的基于L3的移动性管理流程。直接套用目前用于小区内移动性的波束管理方式是不可行的，因为在切换成功之前，UE不能与非服务小区直接进行信令交互。本公开针对特定于小区间移动性管理的多个方面做出了特殊布置，以实现更高效的服务小区改变 流程。
【本公开的示例性实施例】
下面将参照附图详细介绍本公开的示例性实施例。
图5示出了根据本公开的小区间移动性管理的流程示意图，其中示出了小区预配置Stg0、波束测量Stg1、波束上报Stg2、波束激活Stg3、波束指示Stg4等阶段。
Stg0.小区预配置
如图5中的虚线框所示，作为本公开的小区间移动性管理的准备工作，需要进行必要的RRC参数的预配置(Stg0)。在目前Rel.15/R16协议的设计中，为了支持后续的L1和L2功能，RRC层参数的参与是不可避免的，但是根据本公开的实施例，可以提前配置好所需的RRC层参数，尽量避免在后面的移动性管理流程中涉及UE与网络之间的RRC层信令的交互。
在Stg0阶段，服务小区通过RRC信令为UE进行大量的小区级别的参数配置。UE当前接入的服务小区的RRC参数是最基本的，其配置UE如何在该小区内正确地工作。UE的服务小区可能不止一个，例如在载波聚合的场景下，为UE提供服务的是包含一个sPCell和若干个SCell的小区组(例如MCG或SCG)。
除了服务小区以外，网络还可以为UE配置至少一个非服务小区的RRC参数，以便在后面的小区间移动性过程中使用。配置多少个非服务小区以及哪些非服务小区取决于网络的内部实现。图6示出了小区间移动性的示意性场景，其中通过对UE移动方向的估计，网络可以预测UE可能请求进入的潜在小区NSC#A、NSC#B，从而为UE提前配置小区SC#0、NSC#A、NSC#B的RRC参数。其中，小区SC#0对于UE来说处于激活状态，即，是UE的服务小区，而小区NSC#A和NSC#B处于非激活状态，即，是UE的非服务小区。应理解，图6中所示的场景仅仅是示例性的，用于说明而非限制的目的。
服务小区SC#0通过其服务波束向UE发送包含小区预配置信息的RRC信令。小区预配置信息可以由很多信息元素(IE)组成，不同的信息元素包含不同的配置参数。RRC参数可以使用嵌套关系来配置。例如，图7示出了TS 38.331中用于配置小区组MCG或SCG的信息元素CellGroupConfig，它具有信息元素spCellConfig，后者进一 步包含用于特殊小区sPCell的RRC参数。
根据本公开的实施例，由服务小区提前配置的RRC参数至少包括各小区及其波束的标识信息。服务小区或非服务小区可以通过例如PCI标识，而小区的波束可以通过参考信号标识。对于每个小区，可以在RRC参数中配置与该小区的一组下行波束对应的参考信号。由此，在UE侧测量这些参考信号相当于对这些下行波束进行扫描的过程。
不同于现有的小区间移动性管理，在本公开中可用的参考信号并不限于用于层3移动性测量的参考信号，诸如用于移动性的SSB或CSI-RS，而是扩展到其它用途的参考信号资源。例如，针对每个小区配置的参考信号可以是用于层1用途的参考信号资源，包括：用于初始接入的SSB、用于波束管理的CSI-RS、用于跟踪的CSI-RS、用于信道状态信息获取的CSI-RS。此外，参考信号还可以是下行的定位参考信号，即，PRS。PRS是在Rel.16中定义的用于小区内或小区间的下行参考信号，目的是让UE可以通过测量该参考信号来完成定位的功能。
在RRC参数中，波束由相关联的参考信号资源的索引标识。在一个示例中，RRC参数可以直接用参考信号的索引来指代波束，诸如SSB资源指示符(SSBRI)、CSI-RS资源指示符(CRI)、PRS资源的索引等。除了这种直接引用参考信号索引的方式以外，RRC参数还可以通过包括对应的传输配置指示(TCI)状态来标识波束。
图8例示了TCI状态的配置。如图8中所示，TCI状态由TCI状态ID标识。每个TCI状态包含用于配置一个或两个下行参考信号与PDSCH/PDCCH的DMRS端口之间的准共址(QCL)关系的参数。对于第一个下行参考信号，这种准共址关系由RRC层参数qcl-Type1配置。如果还有第二个下行参考信号，则准共址关系由qcl-Type2配置。如图8中所示，qcl-Type1或qcl-Type2参数包括以下信息：服务小区索引ServCellIndex；带宽部分ID——BWP-Id；提供QCL信息的源参考信号资源，包括NZP-CSI-RS资源(由NZP-CSI-RS-ResoureId标识)和SSB资源(由SSB-Index标识)。与每个下行参考信号对应的QCL类型由qcl-Type参数给出，并包括typeA、typeB、typeC、typeD等类型。其中typeD是关于空间接收参数的QCL关系，表示可以使用先前接收在TCI状态中引用的源参考信号(例如SSB或CSI-RS)的空间接收参数(接收波束)来接收该TCI状态所指示的参考信号(例如DMRS)。为了避免歧义，每个TCI状态一般仅允许包含一个 “typeD”类型的准共址假设。
小区可以为它的一组波束设置一组TCI状态，每个TCI状态中引用与波束对应的参考信号。因此，TCI状态也可以用来标识对应的波束。在Stg0阶段，服务小区可以将该服务小区或非服务小区的波束所对应的TCI状态配置给UE。UE可以从RRC参数中解码出每个小区的TCI状态，从TCI状态中找到引用的参考信号。
除了上述RRC参数以外，服务小区还可以在Stg0阶段预配置任何其它有用的参数。
可选地，服务小区还可以预配置与测量相关的RRC参数，诸如但不限于：关于测量间隙的参数、用于波束合并/选择的参数、用于小区质量的L3滤波的参数、用于L3波束滤波的参数，等等。
可选地，服务小区还可以预配置与波束上报相关的RRC参数，诸如但不限于：用于评估报告标准的参数、上报波束的最大数量、报告格式信息，等等。
可选地，服务小区还可以预配置与小区接入相关的RRC参数，诸如小区的PRACH资源等，以便于辅助UE接入目标小区。
以图6中所示的场景为例，服务小区向UE发送的小区预配置信息可以包括本小区SC#0、非服务小区NSC#A和非服务小区NSC#B各自的RRC参数。如图9A中所示，对于这些小区，小区预配置信息中分别包括一份配置参数。
然而，考虑到小区级别的RRC配置存储量较大，这里设想了在小区间实现差分配置。图9B示出了小区RRC参数的差分配置的示例。如图9B中所示，小区预配置信息可以由公共配置参数和特定于小区的配置参数构成。举例来说，NW可以把SC#0、NSC#A和NSC#B的大部分的RRC参数都配置为一样，让UE使用同一套RRC参数。但对于需要区分小区间差别的参数，可以单独为每个小区配置，诸如每个小区的ID(即PCI，0～1007)、每个小区内和PCI相关的TCI状态、以及每个小区可以被UE识别不同于当前服务小区的下行参考信号等。
Stg1.波束测量
回到图5，UE可以通过执行波束测量(Stg1)来判断是否触发移动性。这里不讨论关于小区内移动性的触发。
在RRC_CONNECTED状态，基于在Stg0阶段提供的小区预配置信息，UE测量当前服务小区(例如SC#0)和非服务小区(例如NS#A和NSC#B)的多个(至少一个)波束。
取决于波束中检测到的参考信号是被配置用于层1的用途还是被配置用于层3的用途，UE可以确定对参考信号执行L1测量或L3测量。这里参照图10简单介绍L1测量与L3测量的不同。
图10示出了波束测量模型的示意图。作为模型输入的K个波束对应于SSB、CSI-RS、PRS资源的测量。对于服务小区和非服务小区，图10中的测量模型的处理方式是相同的。测量模型中的各个模块和参考点的含义如下。
-A：L1内部的测量，得到UE检测的波束特定样本。
-L1滤波：在A点测得的输入的内部层1滤波。属于UE的实现，不受标准协议约束，可以较快地得到测量结果。
-A 1：在L1滤波之后，由层1上报到层3的测量，即，波束特定测量。
-波束合并/选择：对波束特定测量进行合并，以导出小区质量。波束合并/选择的行为被标准化，并且该模块的配置由RRC信令提供(即，可以在Stg0阶段被预配置)。B点的上报周期等于A 1点的一个测量周期。
-B：在波束合并/选择之后从上报到层3的波束特定测量导出的测量，即，小区质量。
-关于小区质量的L3滤波：对在B点提供的测量执行的滤波。层3滤波器的行为被标准化，并且层3滤波器的配置由RRC信令提供(即，可以在Stg0阶段被预配置)。C点的滤波上报周期等于B点的一个测量周期。
-C：层3滤波器中的处理之后的测量。上报速率等于B点的上报速率。该测量被用作报告标准的一个或多个评估的输入。
-报告标准的评估：检查在D点是否需要实际测量报告。该评估可以基于参考点C处的不止一个测量流，例如，以比较不同的测量，如输入C和C 1所示。UE应该至少在每次报告新的测量结果时评估报告标准。报告标准被标准化，并其配置通过RRC信令提供(即，可以在Stg0阶段被预配置)。
-D：在无线电接口上发送的测量报告信息(消息)。
-L3波束滤波：对在点A 1提供的测量(即，波束特定测量)执行的滤波。波束滤波器的行为被标准化，并且波束滤波器的配置通过RRC信令提供(即，可以在Stg0阶段被预配置)。E点的滤波上报周期等于A 1的一个测量周期。
-E：波束滤波器中的处理之后的测量(即，特定于波束的测量)。上报速率等于A 1的上报速率。该测量被用作选择要报告的X个测量结果的输入。
-用于报告的波束选择：从E点提供的测量中选择X个测量。波束选择的行为被标准化，并且该模块的配置由RRC信令提供(即，可以在Stg0阶段被预配置)。
-F：在无线电接口上发送的测量报告中包括的波束测量信息。
从图10中的测量模型可以看出，在两个不同的层级发生了滤波：在层1(物理层)进行L1滤波以得到波束质量；在层3(RRC层)进行L3滤波以得到小区质量。相比之下，L1滤波可以不需要RRC参数，并具有特定于UE的实现，可以比较快地得到测量结果，但缺点在于测量结果可能不稳定。对于L1测量，典型地可以得到L1-RSRP和L1-SINR两种测量指标。L3滤波需要RRC参数，UE需要根据网络配置的时域滤波参数进行滤波，虽然可以得到比较收敛的测量结果，但是需要消耗的更多的测量时间。对于L3测量，典型地可以得到L3-RSRP、L3-SINR和L3-RSSI三种测量指标。
根据本公开的实施例，与现有的小区间移动性管理中相同，UE可以测量用于移动性的L3参考信号，包括用于移动性的SSB和用于移动性的CSI-RS。前者可以基于RRC配置，也可以是UE自己通过扫频发现的。后者只能是RRC配置的。另外，对于用于移动性的CSI-RS，网络最好提供一个QCL-typeD的SSB来实现该CSI-RS的时域同步。对于L3的参考信号，UE可以对其执行L3测量(包括L1滤波和L3滤波)，并基于L3的测量指标来触发事件评估，即，图10中的“报告标准的评估”模块。
然后，本公开的实施例扩展了可用于小区间移动性管理的参考信号范围。具体而言，UE还可以测量各小区的用于L1用途的参考信号，包括但不限于：用于初始接入的SSB，其可以通过RRC提前配置，也可以是UE自主检测到；用于波束管理、跟踪、信道状态信息的CSI-RS，前提是需要有一个和它具有QCL-typeD关系的来自同一小区的SSB；以及定位参考信号PRS。
对于L1的参考信号，UE可以仅对其执行L1测量(包括L1滤波)，并基于L1的测量指标(即，图10中的点A 1输出的测量结果)来触发事件评估(图10中未示出)。
如图5中的环形箭头所示，UE可以按照预定的测量周期持续进行波束测量，直到触发预定的事件。
Stg2.波束上报
Stg1阶段的测量结果可以触发向服务小区的波束上报。
根据本公开的实施例，触发波束上报的事件可以基于L3测量。例如，可以定义以下几种基于L3测量的事件：
L3-A1：服务小区的L3测量结果好于一个绝对阈值；
L3-A2：服务小区的L3测量结果坏于一个绝对阈值；
L3-A3：非服务小区的L3测量结果比PCell/PSCell好一个偏移量；
L3-A4：非服务小区的L3测量结果好于一个绝对阈值；
L3-A5：PCell/PSCell的L3测量结果坏于一个绝对阈值并且非服务小区/SCell的L3测量好于另一个绝对阈值。
对于上面的事件L3-A1，当前的服务小区能够提供足够好的通信质量，因此可以不触发小区间移动性，自然不需要上报波束测量结果。而当出现事件L3-A2时，说明服务小区无法提供需要的通信质量，因此可以触发小区间移动性，但是因为没有来自非服务小区的测量做对比，UE并不知道哪个非服务小区更好，所以UE可以根据预配置的RRC参数来测量所有可能的非服务小区，即，执行Stg1中的波束测量，以得到一个或多个非服务小区的测量结果。
对于事件L3-A3至L3-A5，都是非服务小区变得更好而服务小区变得不好。在这种情况下，UE知道哪个非服务小区的性能在变好，因此它可以选择性地测量该小区的波束(参考信号)，从而缩小测量的范围以减少不必要的开销。当然，UE也可以测量所有可能的非服务小区，以获得L3测量指标符合要求的其它非服务小区。
根据本公开的实施例，除了对于层3参考信号的L3测量以外，层1参考信号的 L1测量也可以触发波束上报。这有别于现有的小区间移动性管理机制。
类似地，可以自定义基于L1测量的事件如下：
L1-B1：服务小区的L1测量结果好于一个绝对阈值；
L1-B2：服务小区的L1测量结果坏于一个绝对阈值；
L1-B3：非服务小区的L1测量结果比PCell/PSCell好一个偏移量；
L1-B4：非服务小区的L1测量结果好于一个绝对阈值；
L1-B5：PCell/PSCell的L1测量结果坏于一个绝对阈值并且非服务小区/SCell的L1测量好于另一个绝对阈值。
对于事件L1-B1，可以不触发小区间移动性，也不需要上报波束测量结果。而当出现事件L1-B2时，可以触发小区间移动性。UE可以根据预配置的RRC参数来测量所有可能的非服务小区，即，执行Stg1中的波束测量，以得到一个或多个非服务小区的测量结果。
对于事件L1-B3至L1-B5，都是非服务小区变得更好而服务小区变得不好。由于UE知道哪个非服务小区的性能在变好，因此它可以选择性地上报该小区的波束(参考信号)。当然，UE也可以测量所有可能的非服务小区，以获得L1测量指标符合要求的其它非服务小区。
如上所述，当触发了基于L3测量的事件或基于L1测量的事件时，UE可以获取触发事件的非服务小区或者所有非服务小区的波束测量结果。在一个示例中，响应于事件的触发，UE可以在下一个测量周期中开始执行非服务小区的波束的L1测量，以获得诸如L1-RSRP、L1-SINR等指标。在另一个示例中，响应于事件的触发，UE可以从当前测量周期的测量结果(即，触发事件的测量结果)获得非服务小区的波束的L1测量，而无需等待下一个测量周期。如图10中的测量模型所示，即使是L3测量，也经历L1滤波，即，中间可以产生诸如L1-RSRP、L1-SINR等指标。因此，在上面所述的事件L3-A2至L3-A5被触发的情况下，UE可以从当前测量周期的测量结果中导出需要上报的L1指标。
UE可以按照在Stg0阶段预配置的报告配置参数来选择要上报的波束测量结果。 典型地，UE可以被配置为上报最多X个(例如，X为2、4、8等)波束，因此UE可以选择L1测量结果最好的X个波束上报。UE可以优选地上报两个或更多个波束，以供服务小区在做小区切换决策时参考。优选地，UE可以每一个非服务小区上报一个波束，这相当于上报了X个切换目标小区候选，以供服务小区选择。此外，UE可以选择L1测量结果好于服务小区的非服务小区的波束，因为UE总是希望切换到通信质量更好的小区。
作为替代，UE的自主性可以更强，UE自己从一个或多个非服务小区中选择希望接入的非服务小区。此时，UE可以基于测得的非服务小区的L1指标(诸如L1-RSRP、L1-SINR)，选择性能最好的一个非服务小区，并且仅上报该小区的波束测量结果。在这种情况下，服务小区在进行小区决策时没有更多的选择余地。
UE可以用各种方式将波束测量的结果上报给服务小区。
在一个示例中，UE将确定要上报的非服务小区的波束的标识信息和L1测量结果形成为波束报告。图11示出了CSI报告作为波束报告的示例。如图11中所示，要上报的波束由其参考信号的索引标识，诸如CRI或SSBRI，当然也包括PRS资源的索引(未示出)，并且第2、3、4个波束(如果有的话，数量也不限于4个)的L1测量结果是相对于第1个波束的差分测量结果，例如差分RSRP。在这个示例中，UE可以使用现有的波束报告格式，而无需更改报告格式。
应注意，波束报告的内容对于UE和服务小区这两者来说应该是无歧义的。举例来说，服务小区应该能够从波束报告中列出的参考信号索引(例如CRI、SSBRI)知道它属于哪个小区。例如，如果某个非服务小区的参考信号也被配置在来自服务小区的参考信号集合中，则仅凭参考信号索引，服务小区不能确定该参考信号是来自本小区还是来自非服务小区。在这种情况下，UE还需要在波束报告中包含关于参考信号来自于哪个小区的信息，例如，如图12中所示，UE上报的内容可以包括参考信号所属的非服务小区的PCI。
然而，如果参考信号的索引已经包括小区的标识信息，则可以无需再在波束报告指明。举例来说，如果来自服务小区的CSI-RS资源的索引是从0到N-1，而来自非服务小区CSI-RS资源的索引是从N到M-1，则服务小区可以从UE上报的参考信号索引中区分出它是来自服务小区还是非服务小区。此外，SSB本身由主同步信号(PSS) 和辅同步信号(SSS)组成，基于PSS的序列ID(0～2)和SSS的序列ID(0～335)，可以表达3*336＝1008个不同的PCI。在这种情况下，UE可以无需上报PCI。
此外，优选地，UE还可以上报关于所触发的测量事件的信息，以供服务小区在进行切换决策时使用。如图12中所示，波束报告中可以包括触发与每个参考信号相关联的测量事件(例如，上面列举的L3-A2至L3-A5或L1-B2至L1-B5)索引。当服务小区知道了该事件的类型后，可以有针对性地对UE进行移动性管理。当然，这项信息不是必需的，如果服务小区不知道事件类型，也可以基于上报的非服务小区的L1测量结果来进行粗略的移动性管理。
除了图11和12中的CSI报告之外，UE可以将需要上报的内容组织成其它格式。虽然沿用CSI报告格式可以最大程度地兼容现有的波束管理机制，但是新定义更适合于小区间移动性管理的报告格式是可能的。
根据本公开的实施例，波束上报是在层1或层2完成的。在一个示例中，UE可以通过物理上行控制信道(PUCCH)承载的上行控制信息(UCI)完成上报。在另一个示例中，UE可以通过物理上行共享信道(PUSCH)承载的UCI或MAC控制元素(MAC CE)完成上报。UCI属于层1的控制信令，而MAC CE属于层2的控制信令。
UE可以在UCI或MAC CE中上报与波束对应的参考信号(例如CRI、SSBRI、PRS索引标识)和L1测量结果(例如L1-RSPR、L1-SINR)，以及可选的小区标识信息、测量事件类型等。作为替代，UE还可以在MAC CE中包括与波束相关联的TCI状态。如图8中所示，TCI状态中可以包括小区的标识信息(ServCellInddex)和与波束对应的参考信号，因此也可以用作波束的标识信息。
常规地，波束上报可以由服务小区触发，包括周期性的上报、半静态的上报、非周期性的上报，UE可以在服务小区预先配置的或临时调度的可用传输资源上进行上报，诸如PUCCH资源或PUSCH资源。
然而，由UE触发波束上报是更优选的方式，因为可以避免给系统带来不必要的开销。当UE需要进行波束上报时，UE可以通过向服务小区请求PUCCH资源或PUSCH资源，以供发送包含上报内容的UCI或MAC CE。
当通过PUCCH携带UCI来进行波束上报时，因为PUCCH的传输没有确认机制，UE 不知道网络是否已经正确接收到这个上报。根据本公开是实施例，考虑引入一个特殊的控制机制，服务小区可以为UE预配置波束上报的最大传输次数N(例如，在前面所述的预配置阶段Stg0配置)，当UE发送波束报告时，如果在一定的时间内没有收到来自服务小区的响应(例如，后面将描述的波束激活信息)，则UE的计数器递增1，然后UE重新发送波束报告，直到接收到服务小区的响应或者达到最大传输次数N。如果最大传输次数N的PUCCH传输都未成功，则UE可以认为该服务小区的上行已失去同步，从而重新进行初始接入。
当通过利用PUSCH携带UCI或MAC CE来进行波束上报时，PUSCH的传输本身具有隐式的差错控制，即，传输失败时，UE会接收到NACK，而如果UE未接收到NACK，则表示传输成功。因此，UE可以知道网络是否正确接收到该UCI或MAC CE。然而，作为替代，也可以将上面所述的控制机制引入到PUSCH的传输中，即，指定该UE执行的波束上报的最大传输次数。当UE在此最大传输次数的尝试失败后，会考虑放弃该PUSCH传输，该服务小区的上行已失去同步，从而重新进行初始接入。
应理解，虽然在上面的描述中，UE仅上报非服务小区的波束测量结果，但是UE也可以一起上报服务小区的波束测量结果，以供服务小区在进行移动性管理时参考。服务小区的上报内容与非服务小区没有区别，这里不再赘述。
Stg3.波束激活
在接收到来自UE的波束报告后，服务小区执行对于该UE的小区间移动性管理。
具体而言，在一个示例中，小区间移动性包括小区切换，即，UE从当前的服务小区切换至某个非服务小区。服务小区基于波束报告中包含的各小区的波束测量结果来决定是否需要切换以及进一步决定切换至哪个非服务小区。取决于具体的切换策略，服务小区可能还会考虑除上报的L1测量结果以外的其它因素，诸如触发波束上报的事件类型、UE的移动轨迹等。切换决策属于网络的内部实现，可能随着不同的切换策略而异，这里不做详细介绍。
在另一个示例中，小区间移动性包括辅服务小区(SCell)的添加或删除。服务小区基于波束报告中包含的各小区的波束测量结果来决定是否需要添加非服务小区作为UE的SCell。例如，服务小区可以从UE上报的L1测量结果看到某个非服务小区 (例如图6中的NSC#A)的通信质量变好，决定将该非服务小区添加到UE的MCG或SCG，而无需改变PCell或PSCell。
无论是哪种小区间移动性，服务小区需要从UE上报的非服务小区候选中选择出一个或多个，作为当前服务小区的替代或增补。在本公开中，设置所选择的非服务小区作为服务小区(sPCell或SCell)可以被称为“激活”该非服务小区。
优选地，在最终决定激活哪个非服务小区之前，服务小区可以尝试向初步选择的非服务小区候选发送切换请求，以询问该非服务小区是否接受切换。如果接收到对于切换请求的肯定确认(ACK)，则服务小区确定该非服务小区可被激活，否则确定该非服务小区不允许UE接入，并改为选择其它的非服务小区候选。
然而，在UE自主选择激活哪个非服务小区的情况下，UE仅上报一个非服务小区的波束测量结果。服务小区并没有其它的选择余地，可以在切换决策中仅考虑切换至该非服务小区的可能性，例如，向该非服务小区发送切换请求，以询问其是否接受切换，如果接收到对于切换请求的ACK，则确定该非服务小区可被激活。
一旦决定了要激活的非服务小区，服务小区可以向UE通知决策结果。取决于具体的决策策略，要激活的非服务小区可以不限于一个。根据本公开的实施例，可以通过相关联的波束的激活来实现非服务小区的激活。服务小区可以通过L1或L2的信令来向UE发送波束激活信息。
在一个示例中，服务小区可以通过PDSCH向UE发送包含波束激活信息的MAC CE。MAC CE是层2的控制信令。该MAC CE可以是用于激活TCI状态的MAC CE，其中与被激活的波束相关联的TCI状态被激活。当接收到该MAC CE时，UE从TCI状态中找到其中包含的参考信号，从而知道与该参考信号对应的波束已被激活，这也意味着相关联的非服务小区被激活。
在另一个示例中，服务小区可以通过PDCCH或PDSCH向UE发送包含波束激活信息的DCI。DCI是层1的控制信令。该DCI可以用于动态激活或者说更新其中指示的TCI状态。当接收到该DCI时，UE从TCI状态中找到其中包含的参考信号，从而知道与该参考信号对应的波束已被激活，这也意味着相关联的非服务小区被激活。
除了利用TCI状态以外，服务小区也可以在MAC CE或DCI中直接引用与被激活 的波束对应的参考信号的索引，只要能够传达哪个波束或哪些被激活即可。
作为响应，UE可以设置与被激活的波束相关联的非服务小区作为服务小区。例如，UE可以从当前的服务小区切换到该非服务小区，包括开始与非服务小区的初始接入过程，建立与非服务小区的RRC连接，并断开与服务小区的RRC连接。
作为替代，UE可以添加与被激活的波束相关联的非服务小区作为辅服务小区。例如，如图13中所示，UE可以例如在波束上报阶段(Stg2)将NSC#A的波束包含在波束报告中，这相当于将NSC#A推荐为该UE的SCell，而SC#0可以在波束激活阶段(Stg3)利用诸如MAC CE或DCI之类的下行信令来激活NSC#A的波束，作为对于UE推荐的应答，从而激活作为SCell的NSC#A。
当然，其它激活SCell的信令也是可能的。图14A和14B示出了服务小区可以用于激活/去激活SCell的两种MAC CE格式，其中上面的MAC CE具有1个八位字节，下面的MAC CE具有4个八位字节。在每种MAC CE中，R是预留位，C i指示对应的SCell的状态。如果C i被设置为1，则表示如果为MAC实体配置了具有索引ScellIndex i的SCell，则具有索引ScellIndex i的SCell被激活，而C i被设置为0，则具有索引ScellIndex i的SCell被去激活。响应于接收到激活小区NSC#A的MAC CE，UE可以开始与NSC#A的初始接入过程，这里不再详述。
Stg4.波束指示
在非服务小区被设置为服务小区之后，UE可以通过初始接入过程来建立与该小区的RRC连接，并且随后可以与小区进行下行或上行传输。
为了进行与UE的PDCCH或PDSCH传输，被激活的非服务小区(现在已经成为新的服务小区，但是为了区分，仍然称其为非服务小区)需要向UE指示用于接收PDCCH或PDSCH的波束。
根据本公开的实施例，在图5中的Stg4阶段，非服务小区可以通过L1或L2的信令来进行波束指示。L1的信令可以包括DCI，而L2的信令可以包括MAC CE。在这些下行信令中，主要传达的是两个参考信号之间的QCL关系。
利用TCI状态的波束指示机制适用于本公开的波束指示。如前面所提到的，当指示PDCCH或PDSCH的DMRS时，TCI状态传达了其中引用的参考信号(例如SSB、CSI- RS)与DMRS之间的QCL-typeD关系，这意味着UE可以使用先前用于接收TCI状态中的参考信号的空间接收参数(接收波束)来接收PDCCH或PDSCH的DMRS。这里介绍两种类型的QCL指示。
第一种是直接的QCL指示。对于这种直接的波束指示，是说从一个参考信号直接到另一个参考信号。
假设要对非服务小区的PDCCH或PDSCH的DMRS进行指示，则可以考虑以下QCL指示：
Alt.1SSB/CSI-RS/PRS(NSC)→PDCCH DMRS/PDSCH DMRS(NSC)
其中，箭头左边是TCI状态中引用的参考信号(即，QCL指示的源参考信号)，其可以是在Stg1阶段中由UE测量的来自非服务小区的参考信号，包括：L1的参考信号，诸如L1的SSB、CSI-RS、PRS等；以及L3的参考信号，诸如SSB、CSI-RS等。箭头右边是QCL指示的目标参考信号，其可以是非服务小区的PDCCH的DMRS或PDSCH的DMRS。
图15A示出了利用上述QCL指示的示意性场景。在图15A中，SC#0是移动性管理之前的服务小区，NSC#A是在移动性管理中被激活的非服务小区。如图15A中所示，源参考信号(图15中示为“测量RS”)和目标参考信号(“DMRS”)都来自于NSC#A，它们之间具有typeD的QCL关系，因此，小区NSC#A在进行PDCCH或PDSCH传输时，使用发射测量RS的波束来发送PDCCH或PDSCH，相应地，UE使用接收测量RS的波束来接收PDCCH或PDSCH。
作为替代，在实现服务小区时，从网络的角度来说，网络可以通过非服务小区的发送接收点(TRP)来传输服务小区的PDCCH/PDSCH DMRS给UE。例如，如图15B中所示，当SC#0和NSC#A之间有比较好的大容量低时延的连接(例如，光纤连接)时，SC#0的PDCCH或PDSCH可以经由光纤连接传输给NSC#A，再通过NSC#A的TRP发送出去。因此，在这种情况下，可以考虑以下QCL指示：
Alt.2SSB/CSI-RS/PRS(NSC)→PDCCH DMRS/PDSCH DMRS(SC)
其中，箭头左边是TCI状态中引用的源参考信号，其可以是在Stg1阶段中由UE测量的来自非服务小区的参考信号，包括：L1的参考信号，诸如L1的SSB、CSI-RS、 PRS等；以及L3的参考信号，诸如SSB、CSI-RS等。箭头右边是QCL指示的目标参考信号，其可以是服务小区的PDCCH的DMRS或PDSCH的DMRS。
第二种是非直接的QCL指示。对于非直接的QCL关系，是指QCL的源参考信号需要通过中间参考信号来给最终的DMRS传递QCL关系。以SSB为例，当UE完成初始接入，进入RRC_CONNECTED状态之后，考虑到SSB只有20个PRB的带宽以及4个OFDM符号的时域长度，它不再适合作为UE的QCL源。因此，需要一个和该SSB具有QCL-TypeD关系的参考信号作为中间RS来传递QCL关系给其他参考信号，即PDCCH/PDSCH的DMRS。
假设要对非服务小区的PDCCH或PDSCH的DMRS进行指示，则可以考虑以下QCL指示：
Alt.3SSB/CSI-RS/PRS(NSC)→TRS/CSI-RS(NSC)→PDCCH DMRS/PDSCH DMRS(SC)
其中，最左边的参考信号是本应该作为DMRS的QCL源，但是由于种种原因，此参考信号可能不适合用于波束指示，诸如不存在与该参考信号对应的TCI状态、与该参考信号对应的TCI状态不指示QCL-typeD关系等。此时，如图16A中所示，NSC#A可以使用包含中间参考信号(例如TRS或CSI-RS)的TCI状态进行波束指示，而UE在接收到该TCI状态时，基于预先配置的中间参考信号与测量参考信号之间的QCL-TypeD关系，自动使用测量参考信号的接收波束来接收来自NSC#A的PDCCH或PDSCH。
当网络通过非服务小区的发送接收点(TRP)来传输服务小区的PDCCH/PDSCH给UE时，可以考虑以下QCL指示：
Alt.4 SSB/CSI-RS/PRS(NSC)→TRS/CSI-RS(NSC)→PDCCH DMRS/PDSCH DMRS(SC)；
Alt.5 SSB/CSI-RS/PRS(NSC)→TRS/CSI-RS(SC)→PDCCH DMRS/PDSCH DMRS(SC)
如图16B和16C中所示，在这种情况下，目标参考信号是服务小区SC#0的PDCCH或PDSCH的DMRS，而中间参考信号可以是来自SC#0的参考信号，也可以是来自NSC#A的参考信号。前提是事先给UE配置了中间参考信号与测量参考信号之间的 QCL-TypeD关系。
虽然上面介绍了关于下行传输的波束指示，但是利用上下行信道之间的对称性，基站和UE可以使用下行传输的波束来进行上行传输，即，UE使用下行接收波束进行上行发射，而基站使用下行发射波束进行上行接收。
下面将简单描述根据本公开的小区间移动性管理的信令流程。
图17示出了根据一个实施例的小区间移动性管理的信令流程示意图。作为准备工作，服务小区预先将本小区和非服务小区的RRC参数配置给UE(S0)。
UE可以按照测量周期持续地测量来自服务小区和非服务小区的下行参考信号(S1)，并基于L3测量和/或L1测量来检测是否触发小区间移动性。在出现预定测量事件后，UE向服务小区上报关于一个或多个非服务小区的波束报告(S2)。可选地，UE也可以一起或单独向服务小区发送关于服务小区的波束报告。
服务小区至少基于波束报告来进行切换决策(S3)。服务小区向切换目标小区发送切换请求，作为目标小区的非服务小区执行准入控制，并且在接受切换时向服务小区反馈对于切换请求的ACK。随后，服务小区通过MAC CE或DCI向UE发送关于非服务小区的波束的激活信息(S4)。
响应于接收到波束激活信息，UE激活与被激活的波束相关联的非服务小区(S5)，例如，切换至该服务小区或添加该非服务小区作为SCell。
可选地，非服务小区可以通过MAC CE或DCI向UE进行波束指示(S6)，以指定UE用于接收PDCCH或PDSCH的波束。
图18示出了根据另一个实施例的小区间移动性管理的信令流程示意图。这里主要介绍图18与图17的不同之处。
如图18中所示，当L3测量和/或L1测量触发了预定事件时，UE选择要激活的非服务小区，并向服务小区发送关于该非服务小区的波束报告(S21)。服务小区在进行切换决策(S31)时将只需考虑UE上报的非服务小区，并向其发送切换请求。
UE可以自主激活所选择的非服务小区(S51)，而无需来自服务小区的波束激活信息。
如上所述，在根据本公开的小区间移动性管理流程中，仅使用了层1和/或层2的信令，最大程度地减少了高层信令的参与，从而可以提供更加快速、高效的小区间移动性管理。
【电子设备及其通信方法】
接下来描述可以实施本公开的实施例的电子设备和通信方法。
图19A是例示了根据本公开的电子设备100的框图。电子设备100可以是UE或者UE的部件。
如图19A中所示，电子设备100包括处理电路101。处理电路101至少包括测量单元102、上报单元103、确定单元104、设置单元105。处理电路101可被配置为执行图19B中所示的通信方法。处理电路101可以指在计算系统中执行功能的数字电路系统、模拟电路系统或混合信号(模拟信号和数字信号的组合)电路系统的各种实现。处理电路可以包括例如诸如集成电路(IC)、专用集成电路(ASIC)之类的电路、单独处理器核心的部分或电路、整个处理器核心、单独的处理器、诸如现场可编程们阵列(FPGA)的可编程硬件设备、和/或包括多个处理器的系统。
处理电路101中的测量单元102被配置为基于小区预配置信息，测量由服务小区和至少一个非服务小区发射的波束，即执行图19B中的步骤S101。小区预配置信息至少包含每个小区以及与其波束对应的参考信号的标识信息。测量波束包括测量通过波束发送的下行参考信号，诸如层1的SSB、CSI-RS、PRS，或者层3的SSB、CSI-RS，等等。
上报单元103被配置为响应于基于测量的预定事件，通过L1或L2信令向服务小区发送至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告，即执行图19B中的步骤S102。
确定单元104被配置为确定被激活的波束，即执行图19B中的步骤S103。例如，确定单元104可以基于来自服务小区的波束激活信息来确定被激活的波束。可替代地，在上报单元103仅上报一个非服务小区的波束报告的情况下，确定单元104确定该非服务小区的波束为被激活的波束。
设置单元105被配置为设置与被激活的波束相关联的非服务小区作为服务小区，即执行图19B中的步骤S104。设置单元105可以通过切换到与被激活的波束相关联的非服务小区来将其设置为服务小区，或者添加该非服务小区为辅服务小区。
电子设备100还可以包括例如通信单元106和存储器107。
通信单元106可以被配置为在处理电路101的控制下与小区进行通信。在一个示例中，通信单元106可以被实现为发射机或收发机，包括天线阵列和/或射频链路等通信部件。通信单元106用虚线绘出，因为它还可以位于电子设备100外。通信单元106可以从服务小区接收小区预配置信息、波束激活信息等。通信单元106还可以发送由上报单元103生成的波束报告。
电子设备100还可以包括存储器107。存储器107可以存储各种数据和指令，例如用于电子设备100操作的程序和数据、由处理电路101产生的各种数据、将由通信单元106发送的数据等。存储器107用虚线绘出，因为它还可以位于处理电路101内或者位于电子设备100外。存储器107可以是易失性存储器和/或非易失性存储器。例如，存储器107可以包括但不限于随机存储存储器(RAM)、动态随机存储存储器(DRAM)、静态随机存取存储器(SRAM)、只读存储器(ROM)、闪存存储器。
图20A是例示了根据本公开的电子设备200的框图。电子设备200可以是基站或基站的部件。
如图20A中所示，电子设备200包括处理电路201。处理电路201至少包括接收单元202、确定单元203和设置单元204。处理电路201可被配置为执行图20B中所示的通信方法。处理电路201可以指在计算系统中执行功能的数字电路系统、模拟电路系统或混合信号(模拟信号和数字信号的组合)电路系统的各种实现。处理电路可以包括例如诸如集成电路(IC)、专用集成电路(ASIC)之类的电路、单独处理器核心的部分或电路、整个处理器核心、单独的处理器、诸如现场可编程们阵列(FPGA)的可编程硬件设备、和/或包括多个处理器的系统。
处理电路201的接收单元202被配置为通过L1或L2上行信令从用户设备(UE)接收关于一个或多个非服务小区的波束报告，即执行图20B中的步骤S201。所接收的波束报告至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息。
确定单元203被配置为确定所述一个或多个波束中被激活的波束，即执行图20B中的步骤S202。确定单元203可以至少基于波束报告中的L1测量结果来确定被激活的波束。当波束报告仅包含一个非服务小区的波束时，确定单元203确定该非服务小 区的波束将被激活。
设置单元204被配置为设置与被激活的波束相关联的非服务小区作为服务小区，即执行图20B中的步骤S203。设置单元204可以向被激活的非服务小区发送切换请求，以使得UE切换至该非服务小区。作为替代，设置单元204可以响应于UE的推荐，添加被激活的非服务小区作为辅服务小区。
电子设备200还可以包括例如通信单元205和存储器206。
通信单元205可以被配置为在处理电路201的控制下与UE进行通信。在一个示例中，通信单元205可以被实现为发射机或收发机，包括天线阵列和/或射频链路等通信部件。通信单元205用虚线绘出，因为它还可以位于电子设备200外。通信单元205可以向UE发送波束激活信息等。通信单元205还可以从UE接收波束报告等。
电子设备200还可以包括存储器206。存储器206可以存储各种数据和指令，例如用于电子设备200操作的程序和数据、由处理电路201产生的各种数据、由通信单元205接收的各种控制信令或业务数据、将由通信单元205发送的数据等。存储器206用虚线绘出，因为它还可以位于处理电路201内或者位于电子设备200外。存储器206可以是易失性存储器和/或非易失性存储器。例如，存储器206可以包括但不限于随机存储存储器(RAM)、动态随机存储存储器(DRAM)、静态随机存取存储器(SRAM)、只读存储器(ROM)、闪存存储器。
上面已经详细描述了本公开的实施例的各个方面，但是应注意，上面为了描述了所示出的天线阵列的结构、布置、类型、数量等，端口，参考信号，通信设备，通信方法等等，都不是为了将本公开的方面限制到这些具体的示例。
应当理解，上述各实施例中描述的电子设备100、200的各个单元仅是根据其所实现的具体功能划分的逻辑模块，而不是用于限制具体的实现方式。在实际实现时，上述各单元可被实现为独立的物理实体，或者也可以由单个实体(例如，处理器(CPU或DSP等)、集成电路等)来实现。
【本公开的示例性实现】
根据本公开的实施例，可以想到各种实现本公开的概念的实现方式，包括但不限于：
1)、一种用户侧的电子设备，包括：
处理电路，被配置为：
基于小区预配置信息，测量由服务小区和至少一个非服务小区发射的波束；
响应于基于测量的预定事件，通过L1或L2信令向服务小区发送至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；
确定所述一个或多个波束中被激活的波束；以及
设置与被激活的波束相关联的非服务小区作为服务小区。
2)、如1)所述的电子设备，其中，所述小区预配置信息至少包含每个小区以及与其波束对应的参考信号的标识信息。
3)、如1)所述的电子设备，其中，所述小区预配置信息包括所有小区的公共配置参数和特定于每个小区的配置参数。
4)、如1)所述的电子设备，其中，
在所述波束发送L1的参考信号的情况下，基于测量的预定事件包括以下中的至少一个：
服务小区的参考信号的L1测量结果差于绝对阈值；
非服务小区的参考信号的L1测量结果比服务小区的参考信号的L1测量结果好一个偏移量；
非服务小区的参考信号的L1测量结果好于绝对阈值；
服务小区的参考信号的L1测量结果差于绝对阈值且非服务小区的参考信号的L1测量结果好于另一绝对阈值；
在所述波束发送L3的参考信号的情况下，基于测量的预定事件包括以下中的至少一个：
服务小区的参考信号的L3测量结果差于绝对阈值；
非服务小区的参考信号的L3测量结果比服务小区的参考信号的L3测量结果好一个偏移量；
非服务小区的参考信号的L3测量结果好于绝对阈值；
服务小区的参考信号的L3测量结果差于绝对阈值且非服务小区的参考信号的L3测量结果好于另一绝对阈值。
5)、如1)所述的电子设备，其中，所述L1或L2信令包括UCI或MAC CE。
6)、如1)所述的电子设备，其中，所述波束报告还包括以下中的至少一个：
所述至少一个非服务小区的标识符；
所述基于测量的预定事件的类型。
7)、如1)所述的电子设备，其中，所述一个或多个波束中的每个波束的标识信息包括与该波束对应的参考信号的索引或引用与该波束对应的参考信号的TCI状态。
8)、如1)所述的电子设备，其中，响应于基于测量的预定事件，UE触发波束报告的发送，并且在可用的传输资源上发送波束报告或向服务小区请求传输资源以用于发送波束报告。
9)、如1)所述的电子设备，其中，所述处理电路进一步被配置为：
通过L1或L2信令从服务小区接收波束激活信息，所述波束激活信息指示服务小区基于所述波束报告而决定激活的非服务小区的波束；以及
基于所述波束激活信息，确定被激活的波束。
10)、如1)所述的电子设备，其中，所述处理电路进一步被配置为：
响应于基于测量的预定事件，选择具有最佳的L1测量结果的一个非服务小区，并向服务小区发送关于该非服务小区的波束报告；
确定该非服务小区的被激活的波束；以及
设置该非服务小区作为服务小区。
11)、如1)所述的电子设备，其中，设置与被激活的波束相关联的非服务小区作为服务小区包括：
从当前的服务小区切换至与被激活的波束相关联的非服务小区；或
添加与被激活的波束相关联的非服务小区作为辅助服务小区。
12)、如1)所述的电子设备，其中，所述处理电路进一步被配置为：
通过L1或L2信令从与被激活的波束相关联的非服务小区接收对于PDCCH或PDSCH的波束指示信息，该波束指示信息指示所述被激活的波束用于接收随后的PDCCH或PDSCH。
13)、如12)所述的电子设备，其中，所述处理电路被配置为：
在确认发送成功之前，重复发送所述波束报告，直到预定的最大传输次数。
14)、一种控制侧的电子设备，包括：
处理电路，被配置为：
通过L1或L2信令从用户设备(UE)接收至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；
确定所述一个或多个波束中被激活的波束；以及
设置与被激活的波束相关联的非服务小区作为服务小区。
15)、如14)所述的电子设备，其中，所述处理电路进一步被配置为：
基于所述波束报告，从所述一个或多个波束中决定被激活的波束；以及
通过L1或L2信令向UE发送波束激活信息，所述波束激活信息指示所述被激活的波束。
16)、如14)所述的电子设备，其中，所述处理电路进一步被配置为：
向与被激活的波束相关联的非服务小区发送切换请求。
17)、如14)所述的电子设备，其中，所述处理电路进一步配置为：
向UE发送小区预配置信息，使得UE能够基于所述小区预配置信息测量由服务小区和至少一个非服务小区发射的波束。
18)、一种通信方法，包括：
基于小区预配置信息，测量由服务小区和至少一个非服务小区发射的波束；
响应于基于测量的预定事件，通过L1或L2信令向服务小区发送至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；
确定所述一个或多个波束中被激活的波束；以及
设置与被激活的波束相关联的非服务小区作为服务小区。
19)、一种通信方法，包括：
通过L1或L2信令从用户设备(UE)接收至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；
确定所述一个或多个波束中被激活的波束；以及
设置与被激活的波束相关联的非服务小区作为服务小区。
20).一种存储有可执行指令的非暂时性计算机可读存储介质，所述可执行指令当被执行时实现如18)或19)所述的通信方法。
【本公开的应用实例】
本公开中描述的技术能够应用于各种产品。
例如，根据本公开的实施例的电子设备200可以被实现为各种基站或者安装在基站中，电子设备100可以被实现为各种用户设备或被安装在各种用户设备中。
根据本公开的实施例的通信方法可以由各种基站或用户设备实现；根据本公开的实施例的方法和操作可以体现为计算机可执行指令，存储在非暂时性计算机可读存储介质中，并可以由各种基站或用户设备执行以实现上面所述的一个或多个功能。
根据本公开的实施例的技术可以制成各个计算机程序产品，被用于各种基站或用户设备以实现上面所述的一个或多个功能。
本公开中所说的基站可以被实现为任何类型的基站，优选地，诸如3GPP的5G NR标准中定义的宏gNB和ng-eNB。gNB可以是覆盖比宏小区小的小区的gNB，诸如微微gNB、微gNB和家庭(毫微微)gNB。代替地，基站可以被实现为任何其他类型的基站，诸如NodeB、eNodeB和基站收发台(BTS)。基站还可以包括：被配置为控制无线通信的主体以及设置在与主体不同的地方的一个或多个远程无线头端(RRH)、无线中继站、无人机塔台、自动化工厂中的控制节点等。
用户设备可以被实现为移动终端(诸如智能电话、平板个人计算机(PC)、笔记本式PC、便携式游戏终端、便携式/加密狗型移动路由器和数字摄像装置)或者车载终端(诸如汽车导航设备)。用户设备还可以被实现为执行机器对机器(M2M)通 信的终端(也称为机器类型通信(MTC)终端)、无人机、自动化工厂中的传感器和执行器等。此外，用户设备可以为安装在上述终端中的每个终端上的无线通信模块(诸如包括单个晶片的集成电路模块)。
下面简单介绍可以应用本公开的技术的基站和用户设备的示例。
应当理解，本公开中使用的术语“基站”具有其通常含义的全部广度，并且至少包括被用于作为无线通信系统或无线电系统的一部分以便于通信的无线通信站。基站的例子可以例如是但不限于以下：GSM通信系统中的基站收发信机(BTS)和基站控制器(BSC)中的一者或两者；3G通信系统中的无线电网络控制器(RNC)和NodeB中的一者或两者；4G LTE和LTE-A系统中的eNB；5G通信系统中的gNB和ng-eNB。在D2D、M2M以及V2V通信场景下，也可以将对通信具有控制功能的逻辑实体称为基站。在认知无线电通信场景下，还可以将起频谱协调作用的逻辑实体称为基站。在自动化工厂中，可以将提供网络控制功能的逻辑实体称为基站。
基站的第一应用示例
图21是示出可以应用本公开内容的技术的基站的示意性配置的第一示例的框图。在图21中，基站可以实现为gNB 1400。gNB 1400包括多个天线1410以及基站设备1420。基站设备1420和每个天线1410可以经由RF线缆彼此连接。在一种实现方式中，此处的gNB 1400(或基站设备1420)可以对应于上述电子设备200。
天线1410包括多个天线元件，诸如用于大规模MIMO的多个天线阵列。天线1410例如可以被布置成天线阵列矩阵，并且用于基站设备1420发送和接收无线信号。例如，多个天线1410可以与gNB 1400使用的多个频段兼容。
基站设备1420包括控制器1421、存储器1422、网络接口1423以及无线通信接口1425。
控制器1421可以为例如CPU或DSP，并且操作基站设备1420的较高层的各种功能。例如，控制器1421可以包括上面所述的处理电路201，执行图20B中描述的通信方法，或者控制电子设备200的各个部件。例如，控制器1421根据由无线通信接口1425处理的信号中的数据来生成数据分组，并经由网络接口1423来传递所生成的分组。控制器1421可以对来自多个基带处理器的数据进行捆绑以生成捆绑分组，并传递所生成的捆绑 分组。控制器1421可以具有执行如下控制的逻辑功能：该控制诸如为无线资源控制、无线承载控制、移动性管理、接纳控制和调度。该控制可以结合附近的gNB或核心网节点来执行。存储器1422包括RAM和ROM，并且存储由控制器1421执行的程序和各种类型的控制数据(诸如终端列表、传输功率数据以及调度数据)。
网络接口1423为用于将基站设备1420连接至核心网1424(例如，5G核心网)的通信接口。控制器1421可以经由网络接口1423而与核心网节点或另外的gNB进行通信。在此情况下，gNB1400与核心网节点或其他gNB可以通过逻辑接口(诸如NG接口和Xn接口)而彼此连接。网络接口1423还可以为有线通信接口或用于无线回程线路的无线通信接口。如果网络接口1423为无线通信接口，则与由无线通信接口1425使用的频段相比，网络接口1423可以使用较高频段用于无线通信。
无线通信接口1425支持任何蜂窝通信方案(诸如5G NR)，并且经由天线1410来提供到位于gNB 1400的小区中的终端的无线连接。无线通信接口1425通常可以包括例如基带(BB)处理器1426和RF电路1427。BB处理器1426可以执行例如编码/解码、调制/解调以及复用/解复用，并且执行各层(例如物理层、MAC层、RLC层、PDCP层、SDAP层)的各种类型的信号处理。代替控制器1421，BB处理器1426可以具有上述逻辑功能的一部分或全部。BB处理器1426可以为存储通信控制程序的存储器，或者为包括被配置为执行程序的处理器和相关电路的模块。更新程序可以使BB处理器1426的功能改变。该模块可以为插入到基站设备1420的槽中的卡或刀片。可替代地，该模块也可以为安装在卡或刀片上的芯片。同时，RF电路1427可以包括例如混频器、滤波器和放大器，并且经由天线1410来传送和接收无线信号。虽然图21示出一个RF电路1427与一根天线1410连接的示例，但是本公开并不限于该图示，而是一个RF电路1427可以同时连接多根天线1410。
如图21所示，无线通信接口1425可以包括多个BB处理器1426。例如，多个BB处理器1426可以与gNB 1400使用的多个频段兼容。如图21所示，无线通信接口1425可以包括多个RF电路1427。例如，多个RF电路1427可以与多个天线元件兼容。虽然图21示出其中无线通信接口1425包括多个BB处理器1426和多个RF电路1427的示例，但是无线通信接口1425也可以包括单个BB处理器1426或单个RF电路1427。
在图21中示出的gNB 1400中，参照图20A描述的处理电路201中包括的一个或 多个单元(例如接收单元202)可被实现在无线通信接口1425中。可替代地，这些组件中的至少一部分可被实现在控制器1421中。例如，gNB 1400包含无线通信接口1425的一部分(例如，BB处理器1426)或者整体，和/或包括控制器1421的模块，并且一个或多个组件可被实现在模块中。在这种情况下，模块可以存储用于允许处理器起一个或多个组件的作用的程序(换言之，用于允许处理器执行一个或多个组件的操作的程序)，并且可以执行该程序。作为另一个示例，用于允许处理器起一个或多个组件的作用的程序可被安装在gNB 1400中，并且无线通信接口1425(例如，BB处理器1426)和/或控制器1421可以执行该程序。如上所述，作为包括一个或多个组件的装置，gNB 1400、基站设备1420或模块可被提供，并且用于允许处理器起一个或多个组件的作用的程序可被提供。另外，将程序记录在其中的可读介质可被提供。
基站的第二应用示例
图22是示出可以应用本公开的技术的基站的示意性配置的第二示例的框图。在图22中，基站被示出为gNB 1530。gNB 1530包括多个天线1540、基站设备1550和RRH1560。RRH 1560和每个天线1540可以经由RF线缆而彼此连接。基站设备1550和RRH1560可以经由诸如光纤线缆的高速线路而彼此连接。在一种实现方式中，此处的gNB1530(或基站设备1550)可以对应于上述电子设备200。
天线1540包括多个天线元件，诸如用于大规模MIMO的多个天线阵列。天线1540例如可以被布置成天线阵列矩阵，并且用于基站设备1550发送和接收无线信号。例如，多个天线1540可以与gNB 1530使用的多个频段兼容。
基站设备1550包括控制器1551、存储器1552、网络接口1553、无线通信接口1555以及连接接口1557。控制器1551、存储器1552和网络接口1553与参照图21描述的控制器1421、存储器1422和网络接口1423相同。
无线通信接口1555支持任何蜂窝通信方案(诸如5G NR)，并且经由RRH 1560和天线1540来提供到位于与RRH 1560对应的扇区中的终端的无线通信。无线通信接口1555通常可以包括例如BB处理器1556。除了BB处理器1556经由连接接口1557连接到RRH 1560的RF电路1564之外，BB处理器1556与参照图21描述的BB处理器1426相同。如图22所示，无线通信接口1555可以包括多个BB处理器1556。例如，多个BB处理器1556可以与gNB 1530使用的多个频段兼容。虽然图22示出其中无线通信接口1555 包括多个BB处理器1556的示例，但是无线通信接口1555也可以包括单个BB处理器1556。
连接接口1557为用于将基站设备1550(无线通信接口1555)连接至RRH 1560的接口。连接接口1557还可以为用于将基站设备1550(无线通信接口1555)连接至RRH 1560的上述高速线路中的通信的通信模块。
RRH 1560包括连接接口1561和无线通信接口1563。
连接接口1561为用于将RRH 1560(无线通信接口1563)连接至基站设备1550的接口。连接接口1561还可以为用于上述高速线路中的通信的通信模块。
无线通信接口1563经由天线1540来传送和接收无线信号。无线通信接口1563通常可以包括例如RF电路1564。RF电路1564可以包括例如混频器、滤波器和放大器，并且经由天线1540来传送和接收无线信号。虽然图22示出一个RF电路1564与一根天线1540连接的示例，但是本公开并不限于该图示，而是一个RF电路1564可以同时连接多根天线1540。
如图22所示，无线通信接口1563可以包括多个RF电路1564。例如，多个RF电路1564可以支持多个天线元件。虽然图22示出其中无线通信接口1563包括多个RF电路1564的示例，但是无线通信接口1563也可以包括单个RF电路1564。
在图22中示出的gNB 1500中，参照图20A描述的处理电路201中包括的一个或多个单元(例如接收单元202)可被实现在无线通信接口1525中。可替代地，这些组件中的至少一部分可被实现在控制器1521中。例如，gNB 1500包含无线通信接口1525的一部分(例如，BB处理器1526)或者整体，和/或包括控制器1521的模块，并且一个或多个组件可被实现在模块中。在这种情况下，模块可以存储用于允许处理器起一个或多个组件的作用的程序(换言之，用于允许处理器执行一个或多个组件的操作的程序)，并且可以执行该程序。作为另一个示例，用于允许处理器起一个或多个组件的作用的程序可被安装在gNB 1500中，并且无线通信接口1525(例如，BB处理器1526)和/或控制器1521可以执行该程序。如上所述，作为包括一个或多个组件的装置，gNB 1500、基站设备1520或模块可被提供，并且用于允许处理器起一个或多个组件的作用的程序可被提供。另外，将程序记录在其中的可读介质可被提供。
用户设备的第一应用示例
图23是示出可以应用本公开内容的技术的智能电话1600的示意性配置的示例的框图。在一个示例中，智能电话1600可以被实现为参照图19A描述的电子设备100。
智能电话1600包括处理器1601、存储器1602、存储装置1603、外部连接接口1604、摄像装置1606、传感器1607、麦克风1608、输入装置1609、显示装置1610、扬声器1611、无线通信接口1612、一个或多个天线开关1615、一个或多个天线1616、总线1617、电池1618以及辅助控制器1619。
处理器1601可以为例如CPU或片上系统(SoC)，并且控制智能电话1600的应用层和另外层的功能。处理器1601可以包括或充当参照图19A描述的处理电路101。存储器1602包括RAM和ROM，并且存储数据和由处理器1601执行的程序。存储装置1603可以包括存储介质，诸如半导体存储器和硬盘。外部连接接口1604为用于将外部装置(诸如存储卡和通用串行总线(USB)装置)连接至智能电话1600的接口。
摄像装置1606包括图像传感器(诸如电荷耦合器件(CCD)和互补金属氧化物半导体(CMOS))，并且生成捕获图像。传感器1607可以包括一组传感器，诸如测量传感器、陀螺仪传感器、地磁传感器和加速度传感器。麦克风1608将输入到智能电话1600的声音转换为音频信号。输入装置1609包括例如被配置为检测显示装置1610的屏幕上的触摸的触摸传感器、小键盘、键盘、按钮或开关，并且接收从用户输入的操作或信息。显示装置1610包括屏幕(诸如液晶显示器(LCD)和有机发光二极管(OLED)显示器)，并且显示智能电话1600的输出图像。扬声器1611将从智能电话1600输出的音频信号转换为声音。
无线通信接口1612支持任何蜂窝通信方案(诸如4G LTE或5G NR等等)，并且执行无线通信。无线通信接口1612通常可以包括例如BB处理器1613和RF电路1614。BB处理器1613可以执行例如编码/解码、调制/解调以及复用/解复用，并且执行用于无线通信的各种类型的信号处理。同时，RF电路1614可以包括例如混频器、滤波器和放大器，并且经由天线1616来传送和接收无线信号。无线通信接口1612可以为其上集成有BB处理器1613和RF电路1614的一个芯片模块。如图23所示，无线通信接口1612可以包括多个BB处理器1613和多个RF电路1614。虽然图23示出其中无线通信接口1612包括多个BB处理器1613和多个RF电路1614的示例，但是无线通信接口1612也可以包 括单个BB处理器1613或单个RF电路1614。
此外，除了蜂窝通信方案之外，无线通信接口1612可以支持另外类型的无线通信方案，诸如短距离无线通信方案、近场通信方案和无线局域网(LAN)方案。在此情况下，无线通信接口1612可以包括针对每种无线通信方案的BB处理器1613和RF电路1614。
天线开关1615中的每一个在包括在无线通信接口1612中的多个电路(例如用于不同的无线通信方案的电路)之间切换天线1616的连接目的地。
天线1616包括多个天线元件，诸如用于大规模MIMO的多个天线阵列。天线1616例如可以被布置成天线阵列矩阵，并且用于无线通信接口1612传送和接收无线信号。智能电话1600可以包括一个或多个天线面板(未示出)。
此外，智能电话1600可以包括针对每种无线通信方案的天线1616。在此情况下，天线开关1615可以从智能电话1600的配置中省略。
总线1617将处理器1601、存储器1602、存储装置1603、外部连接接口1604、摄像装置1606、传感器1607、麦克风1608、输入装置1609、显示装置1610、扬声器1611、无线通信接口1612以及辅助控制器1619彼此连接。电池1618经由馈线向图23所示的智能电话1600的各个块提供电力，馈线在图中被部分地示为虚线。辅助控制器1619例如在睡眠模式下操作智能电话1600的最小必需功能。
在图23中示出的智能电话1600中，参照图19A描述的处理电路101中包括的一个或多个组件(例如，上报单元103)可被实现在无线通信接口1612中。可替代地，这些组件中的至少一部分可被实现在处理器1601或者辅助控制器1619中。作为一个示例，智能电话1600包含无线通信接口1612的一部分(例如，BB处理器1613)或者整体，和/或包括处理器1601和/或辅助控制器1619的模块，并且一个或多个组件可被实现在该模块中。在这种情况下，该模块可以存储允许处理起一个或多个组件的作用的程序(换言之，用于允许处理器执行一个或多个组件的操作的程序)，并且可以执行该程序。作为另一个示例，用于允许处理器起一个或多个组件的作用的程序可被安装在智能电话1600中，并且无线通信接口1612(例如，BB处理器1613)、处理器1601和/或辅助控制器1619可以执行该程序。如上所述，作为包括一个或多个组 件的装置，智能电话1600或者模块可被提供，并且用于允许处理器起一个或多个组件的作用的程序可被提供。另外，将程序记录在其中的可读介质可被提供。
用户设备的第二应用示例
图24是示出可以应用本公开的技术的汽车导航设备1720的示意性配置的示例的框图。汽车导航设备1720可以被实现为参照图19A描述的电子设备100。汽车导航设备1720包括处理器1721、存储器1722、全球定位系统(GPS)模块1724、传感器1725、数据接口1726、内容播放器1727、存储介质接口1728、输入装置1729、显示装置1730、扬声器1731、无线通信接口1733、一个或多个天线开关1736、一个或多个天线1737以及电池1738。
处理器1721可以为例如CPU或SoC，并且控制汽车导航设备1720的导航功能和另外的功能。存储器1722包括RAM和ROM，并且存储数据和由处理器1721执行的程序。
GPS模块1724使用从GPS卫星接收的GPS信号来测量汽车导航设备1720的位置(诸如纬度、经度和高度)。传感器1725可以包括一组传感器，诸如陀螺仪传感器、地磁传感器和空气压力传感器。数据接口1726经由未示出的终端而连接到例如车载网络1741，并且获取由车辆生成的数据(诸如车速数据)。
内容播放器1727再现存储在存储介质(诸如CD和DVD)中的内容，该存储介质被插入到存储介质接口1728中。输入装置1729包括例如被配置为检测显示装置1730的屏幕上的触摸的触摸传感器、按钮或开关，并且接收从用户输入的操作或信息。显示装置1730包括诸如LCD或OLED显示器的屏幕，并且显示导航功能的图像或再现的内容。扬声器1731输出导航功能的声音或再现的内容。
无线通信接口1733支持任何蜂窝通信方案(诸如4G LTE或5G NR)，并且执行无线通信。无线通信接口1733通常可以包括例如BB处理器1734和RF电路1735。BB处理器1734可以执行例如编码/解码、调制/解调以及复用/解复用，并且执行用于无线通信的各种类型的信号处理。同时，RF电路1735可以包括例如混频器、滤波器和放大器，并且经由天线1737来传送和接收无线信号。无线通信接口1733还可以为其上集成有BB处理器1734和RF电路1735的一个芯片模块。如图24所示，无线通信接口1733可以包括多个BB处理器1734和多个RF电路1735。虽然图24示出其中无线通信接口1733包 括多个BB处理器1734和多个RF电路1735的示例，但是无线通信接口1733也可以包括单个BB处理器1734或单个RF电路1735。
此外，除了蜂窝通信方案之外，无线通信接口1733可以支持另外类型的无线通信方案，诸如短距离无线通信方案、近场通信方案和无线LAN方案。在此情况下，针对每种无线通信方案，无线通信接口1733可以包括BB处理器1734和RF电路1735。
天线开关1736中的每一个在包括在无线通信接口1733中的多个电路(诸如用于不同的无线通信方案的电路)之间切换天线1737的连接目的地。
天线1737包括多个天线元件，诸如用于大规模MIMO的多个天线阵列。天线1737例如可以被布置成天线阵列矩阵，并且用于无线通信接口1733传送和接收无线信号。
此外，汽车导航设备1720可以包括针对每种无线通信方案的天线1737。在此情况下，天线开关1736可以从汽车导航设备1720的配置中省略。
电池1738经由馈线向图24所示的汽车导航设备1720的各个块提供电力，馈线在图中被部分地示为虚线。电池1738累积从车辆提供的电力。
在图24中示出的汽车导航装置1720中，参照图19A描述的处理电路101中包括的一个或多个组件(例如，上报单元103)可被实现在无线通信接口1733中。可替代地，这些组件中的至少一部分可被实现在处理器1721中。作为一个示例，汽车导航装置1720包含无线通信接口1733的一部分(例如，BB处理器1734)或者整体，和/或包括处理器1721的模块，并且一个或多个组件可被实现在该模块中。在这种情况下，该模块可以存储允许处理起一个或多个组件的作用的程序(换言之，用于允许处理器执行一个或多个组件的操作的程序)，并且可以执行该程序。作为另一个示例，用于允许处理器起一个或多个组件的作用的程序可被安装在汽车导航装置1720中，并且无线通信接口1733(例如，BB处理器1734)和/或处理器1721可以执行该程序。如上所述，作为包括一个或多个组件的装置，汽车导航装置1720或者模块可被提供，并且用于允许处理器起一个或多个组件的作用的程序可被提供。另外，将程序记录在其中的可读介质可被提供。
另外，在图24中示出的汽车导航装置1720中，例如，参照图19A描述的通信单元106可被实现在无线通信接口1933(例如，RF电路1935)中。
本公开的技术也可以被实现为包括汽车导航设备1720、车载网络1741以及车辆模块1742中的一个或多个块的车载系统(或车辆)1740。车辆模块1742生成车辆数据(诸如车速、发动机速度和故障信息)，并且将所生成的数据输出至车载网络1741。
以上参照附图描述了本公开的示例性实施例，但是本公开当然不限于以上示例。本领域技术人员可在所附权利要求的范围内得到各种变更和修改，并且应理解这些变更和修改自然将落入本公开的技术范围内。
例如，在以上实施例中包括在一个单元中的多个功能可以由分开的装置来实现。替选地，在以上实施例中由多个单元实现的多个功能可分别由分开的装置来实现。另外，以上功能之一可由多个单元来实现。无需说，这样的配置包括在本公开的技术范围内。
在该说明书中，流程图中所描述的步骤不仅包括以所述顺序按时间序列执行的处理，而且包括并行地或单独地而不是必须按时间序列执行的处理。此外，甚至在按时间序列处理的步骤中，无需说，也可以适当地改变该顺序。
虽然已经详细说明了本公开及其优点，但是应当理解在不脱离由所附的权利要求所限定的本公开的精神和范围的情况下可以进行各种改变、替代和变换。而且，本公开实施例的术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。

Claims (20)

  1. 一种用户侧的电子设备，包括：
    处理电路，被配置为：
    基于小区预配置信息，测量由服务小区和至少一个非服务小区发射的波束；
    响应于基于测量的预定事件，通过L1或L2信令向服务小区发送至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；
    确定所述一个或多个波束中被激活的波束；以及
    设置与被激活的波束相关联的非服务小区作为服务小区。
  2. 如权利要求1所述的电子设备，其中，所述小区预配置信息至少包含每个小区以及与其波束对应的参考信号的标识信息。
  3. 如权利要求1所述的电子设备，其中，所述小区预配置信息包括所有小区的公共配置参数和特定于每个小区的配置参数。
  4. 如权利要求1所述的电子设备，
    其中，在所述波束发送L1的参考信号的情况下，基于测量的预定事件包括以下中的至少一个：
    服务小区的参考信号的L1测量结果差于绝对阈值；
    非服务小区的参考信号的L1测量结果比服务小区的参考信号的L1测量结果好一个偏移量；
    非服务小区的参考信号的L1测量结果好于绝对阈值；
    服务小区的参考信号的L1测量结果差于绝对阈值且非服务小区的参考信号的L1测量结果好于另一绝对阈值；
    在所述波束发送L3的参考信号的情况下，基于测量的预定事件包括以下中的至少一个：
    服务小区的参考信号的L3测量结果差于绝对阈值；
    非服务小区的参考信号的L3测量结果比服务小区的参考信号的L3测量结果好一个偏移量；
    非服务小区的参考信号的L3测量结果好于绝对阈值；
    服务小区的参考信号的L3测量结果差于绝对阈值且非服务小区的参考信号的L3测量结果好于另一绝对阈值。
  5. 如权利要求1所述的电子设备，其中，所述L1或L2信令包括UCI或MAC CE。
  6. 如权利要求1所述的电子设备，其中，所述波束报告还包括以下中的至少一个：
    所述至少一个非服务小区的标识符；
    所述基于测量的预定事件的类型。
  7. 如权利要求1所述的电子设备，其中，所述一个或多个波束中的每个波束的标识信息包括与该波束对应的参考信号的索引或引用与该波束对应的参考信号的TCI状态。
  8. 如权利要求1所述的电子设备，其中，响应于基于测量的预定事件，UE触发波束报告的发送，并且在可用的传输资源上发送波束报告或向服务小区请求传输资源以用于发送波束报告。
  9. 如权利要求1所述的电子设备，其中，所述处理电路进一步被配置为：
    通过L1或L2信令从服务小区接收波束激活信息，所述波束激活信息指示服务小区基于所述波束报告而决定激活的非服务小区的波束；以及
    基于所述波束激活信息，确定被激活的波束。
  10. 如权利要求1所述的电子设备，其中，所述处理电路进一步被配置为：
    响应于基于测量的预定事件，选择具有最佳的L1测量结果的一个非服务小区，并向服务小区发送关于该非服务小区的波束报告；
    确定该非服务小区的被激活的波束；以及
    设置该非服务小区作为服务小区。
  11. 如权利要求1所述的电子设备，其中，设置与被激活的波束相关联的非服务小区作为服务小区包括：
    从当前的服务小区切换至与被激活的波束相关联的非服务小区；或
    添加与被激活的波束相关联的非服务小区作为辅助服务小区。
  12. 如权利要求1所述的电子设备，其中，所述处理电路进一步被配置为：
    通过L1或L2信令从与被激活的波束相关联的非服务小区接收对于PDCCH或PDSCH的波束指示信息，该波束指示信息指示所述被激活的波束用于接收随后的PDCCH或PDSCH。
  13. 如权利要求12所述的电子设备，其中，所述处理电路被配置为：
    在确认发送成功之前，重复发送所述波束报告，直到预定的最大传输次数。
  14. 一种控制侧的电子设备，包括：
    处理电路，被配置为：
    通过L1或L2信令从用户设备(UE)接收至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；
    确定所述一个或多个波束中被激活的波束；以及
    设置与被激活的波束相关联的非服务小区作为服务小区。
  15. 如权利要求14所述的电子设备，其中，所述处理电路进一步被配置为：
    基于所述波束报告，从所述一个或多个波束中决定被激活的波束；以及
    通过L1或L2信令向UE发送波束激活信息，所述波束激活信息指示所述被激活的波束。
  16. 如权利要求14所述的电子设备，其中，所述处理电路进一步被配置为：
    向与被激活的波束相关联的非服务小区发送切换请求。
  17. 如权利要求14所述的电子设备，其中，所述处理电路进一步配置为：
    向UE发送小区预配置信息，使得UE能够基于所述小区预配置信息测量由服务小 区和至少一个非服务小区发射的波束。
  18. 一种通信方法，包括：
    基于小区预配置信息，测量由服务小区和至少一个非服务小区发射的波束；
    响应于基于测量的预定事件，通过L1或L2信令向服务小区发送至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；
    确定所述一个或多个波束中被激活的波束；以及
    设置与被激活的波束相关联的非服务小区作为服务小区。
  19. 一种通信方法，包括：
    通过L1或L2信令从用户设备(UE)接收至少包含一个或多个非服务小区的一个或多个波束的L1测量结果和标识信息的波束报告；
    确定所述一个或多个波束中被激活的波束；以及
    设置与被激活的波束相关联的非服务小区作为服务小区。
  20. 一种存储有可执行指令的非暂时性计算机可读存储介质，所述可执行指令当被执行时实现如权利要求18或19所述的通信方法。
PCT/CN2022/083931 2021-04-02 2022-03-30 电子设备、通信方法和存储介质 Ceased WO2022206801A1 (zh)

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