WO2025013207A1 - 端末、無線通信方法及び基地局 - Google Patents
端末、無線通信方法及び基地局 Download PDFInfo
- Publication number
- WO2025013207A1 WO2025013207A1 PCT/JP2023/025610 JP2023025610W WO2025013207A1 WO 2025013207 A1 WO2025013207 A1 WO 2025013207A1 JP 2023025610 W JP2023025610 W JP 2023025610W WO 2025013207 A1 WO2025013207 A1 WO 2025013207A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- information
- switching
- cell
- unit
- base station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
Definitions
- This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.
- LTE Long Term Evolution
- UMTS Universal Mobile Telecommunications System
- Non-Patent Document 1 LTE-Advanced (3GPP Rel. 10-14) was specified for the purpose of achieving higher capacity and greater sophistication over LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).
- LTE 5th generation mobile communication system
- 5G+ 5th generation mobile communication system
- 6G 6th generation mobile communication system
- NR New Radio
- Mobility as a Service MaaS
- UE User Equipment
- NW networks
- one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can achieve high-speed and seamless communication.
- a terminal has a receiver that receives information related to the connection and switching of multiple cells, and a controller that controls, based on the information, at least one of a first operation related to the connection and switching of the multiple cells and a second operation that is performed before the first operation.
- high-speed and seamless communication can be achieved.
- FIG. 1A and 1B are diagrams showing an example of a time-triggered CHO/position-triggered CHO.
- FIG. 2 is a diagram illustrating an example of communication using MaaS.
- FIG. 3 is a diagram showing an example of a system configuration using an MF.
- 4A and 4B are diagrams showing an example of the correspondence between areas/conditions and cells according to embodiment 2-1.
- FIG. 5 is a diagram showing an example of a method of switching operation/pre-operation of a UE according to embodiment 3-2.
- FIG. 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 7 is a diagram illustrating an example of the configuration of a base station according to an embodiment.
- FIG. 8 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment.
- FIG. 9 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment.
- FIG. 10 is a diagram illustrating an example of a vehicle according to an embodiment.
- HO includes, for example, gNB-CU (Central Unit) HO (Inter gNB-CU HO), gNB-CU HO (Intra gNB-CU HO), gNB-DU (Distributed Unit) HO (Intra gNB-DU). HO) included.
- gNB-CU Central Unit
- gNB-CU HO Intra gNB-CU HO
- gNB-DU Distributed Unit
- HO Intra gNB-DU
- HO also includes, for example, Condition HO (CHO).
- CHO refers to HO that is performed when multiple candidates for the HO destination base station (BS)/cell (candidate BS/cells) are set and certain conditions are met.
- CHO may be performed when the quality of a neighboring cell falls below a threshold (when event A4 occurs) regardless of the quality of the serving cell.
- time-triggered CHO is defined.
- time-triggered CHO CHO is performed when the service provision time of the NTN cell has passed.
- FIG. 1A is a diagram showing an example of time-triggered CHO.
- the UE communicates with a low earth orbit satellite (LEO), which is an NTN cell.
- LEO low earth orbit satellite
- the LEO since the LEO does not remain in a fixed position, service to the point is stopped after a certain time/hour. For this reason, the UE needs to perform time-triggered CHO based on that certain time/hour.
- location-triggered CHO is defined for CHO in NTN.
- location-triggered CHO CHO is performed when the UE location and the cell reference location are separated by a certain amount (above a specific threshold).
- FIG. 1B is a diagram showing an example of location-triggered CHO.
- FIG. 1B shows an example in which the cell range formed by the LEO moves on the ground.
- the reference position of the cell e.g., the center position of the cell
- the UE needs to perform location-triggered CHO based on the UE's position and the reference position of the cell.
- HO also includes dual active protocol stack based handover (DAPS HO), which simultaneously connects to the BS/cell before HO and the BS/cell after HO.
- DAPS HO dual active protocol stack based handover
- HO also includes HO by L1/L2 signals (L1L2-triggered mobility (LTM)).
- LTM L1/L2 signals
- HO may refer to the operation of switching the connection destination (BS/cell).
- FIG. 2 is a diagram showing an example of communication using MaaS.
- a UE moves to a destination using multiple means of transportation.
- BS/cell switching occurs (in the case of FIG. 2, the connection with the BS is switched in the order of BS#0, #1, #2, and #3).
- wireless sensing/positioning technology allows the network (NW) to dynamically grasp the situation in the real world.
- the inventors therefore came up with a way to solve the above problem.
- A/B and “at least one of A and B” may be interpreted as interchangeable. Also, in this disclosure, “A/B/C” may mean “at least one of A, B, and C.”
- Radio Resource Control RRC
- RRC parameters RRC parameters
- RRC messages higher layer parameters, fields, information elements (IEs), settings, etc.
- IEs information elements
- CE Medium Access Control
- update commands activation/deactivation commands, etc.
- the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocols (e.g., NR Positioning Protocol A (NRPPa)/LTE Positioning Protocol (LPP)) messages), or a combination of these.
- RRC Radio Resource Control
- MAC Medium Access Control
- LPP LTE Positioning Protocol
- the MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc.
- the broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.
- MIB Master Information Block
- SIB System Information Block
- RMSI Remaining Minimum System Information
- OSI System Information
- the physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.
- DCI Downlink Control Information
- UCI Uplink Control Information
- mobility-related core functions mobility functions (Mobility functions (MF)), mobility-related network functions, network functions, mobility-related network servers, network servers, servers, mobility-related network devices, network devices, devices, mobility-related network components, network components, and components may be interpreted as interchangeable.
- mobility functions Mobility functions (MF)
- mobility-related network functions network functions, mobility-related network servers, network servers, servers, mobility-related network devices, network devices, devices, mobility-related network components, network components, and components
- MF mobility functions
- the MF may have the same configuration as the base station/terminal, or it may have a different configuration.
- services/frameworks/systems relating to a combination of multiple means of transportation, Mobility as a Service (MaaS), and services/frameworks/systems involving switching between multiple cells/BSs may be interpreted as interchangeable.
- the MF may be, for example, included in another network function (e.g., Access and Mobility management Function (AMF)) or may be another network function.
- AMF Access and Mobility management Function
- an interface between the MF and at least one of the application layer functions and other core functions may be defined.
- the MF may be replaced by, for example, an application layer function/base station (BS) function.
- BS base station
- an interface between a UE and an MF may be defined.
- an interface between a BS and an MF may be defined.
- information transmission and reception between the UE and the MF may be performed via the BS.
- UE capabilities related to MF may be defined. If the UE supports a particular function/frequency/service, it may report the support (e.g., whether or not it is supported, or that it is supported) to the NW.
- Parameters related to MF may be set/notified to the UE.
- the parameters may be transmitted, for example, using system information (e.g., MIB/SIB)/higher layer signaling (e.g., RRC).
- the UE may perform corresponding operations based on the setting/reception of the parameters.
- an action e.g., HO
- a notification from an MF may be initiated based on a decision by a UE to move using MaaS.
- MaaS information/system regarding movement/mobility
- information/system regarding the use of multiple means of movement/mobility, etc. may be read as interchangeable.
- the UE or MaaS server may send reports/triggers/requests to the NW regarding at least one of the initiation of an operation using MF and the determination/initiation of a movement using MaaS.
- the NW may instruct the UE to at least one of initiate an operation using MF and determine/initiate mobility using MaaS.
- FIG. 3 is a diagram showing an example of a system configuration using an MF.
- the NW functions are an MF, an LMF, a sensing function (SF), and a server for information related to MaaS (MaaS server).
- the MF is connected to the LMF, the SF, and the MaaS server.
- the network function (MF) is connected to each BS.
- the UE performs HO with each BS as it moves.
- the UE performs communication using MaaS based on the settings/instructions from the MF.
- each embodiment of the present disclosure will be described mainly using HO as an example, but each embodiment of the present disclosure may also be applied to beam switching in a UE/BS.
- the first embodiment relates to information collected at the MF.
- the MF may receive specific information (e.g., mobility-related information) using a specific method.
- specific information e.g., mobility-related information
- the MF may receive specific information from a specific server.
- the particular server in question may be, for example, an application layer server (e.g., a MaaS server).
- an application layer server e.g., a MaaS server.
- the specific information may be, for example, information regarding the movement of the UE.
- the information regarding the UE's mobility may be, for example, at least one of the following information: - Information regarding the UE's movement path/speed/altitude. - Information regarding the (current) location/altitude of the UE. - Information about the location/velocity/altitude of the UE (while moving) at each time in the future (e.g. after a certain time period/cycle). - Information regarding the communication quality required in the UE. - Information regarding service requests. - QoS (Quality of Service) indicator. ⁇ Slicing index.
- the location of a UE/NW may be indicated by specific location information.
- the location information may include at least one of the following: information (e.g., latitude, longitude, altitude) obtained using a positioning system (e.g., a satellite positioning system (Global Navigation Satellite System (GNSS), Global Positioning System (GPS), etc.)), information on a BS adjacent to (or serving) the UE (e.g., a BS/cell identifier (ID), a BS-UE distance, a direction/angle of the BS (UE) as seen from the UE (BS), coordinates of the BS (UE) as seen from the UE (BS) (e.g., X/Y/Z coordinates), etc.), and a specific address of the UE (e.g., an Internet Protocol (IP) address).
- IP Internet Protocol
- the location information of the UE is not limited to information based on the position of the BS, but may be information based on a specific point (e.g., a reference point).
- the location information may be expressed as a numerical value using a global coordinate system (GCS)/local coordinate system (LCS).
- GCS global coordinate system
- LCDS local coordinate system
- the location information may include information about its implementation (e.g., at least one of the location/position/orientation of the antenna, the location/orientation of the antenna panel, the number of antennas, and the number of antenna panels).
- the location information may include mobility information.
- the mobility information may include information indicating at least one of the following: a mobility type, a moving speed of the UE, an acceleration of the UE, and a moving direction of the UE.
- the mobility type may correspond to at least one of fixed location UE, movable/moving UE, no mobility UE, low mobility UE, middle mobility UE, high mobility UE, cell-edge UE, not-cell-edge UE, etc.
- the MF may receive the specific information at a specific time.
- the particular timing may be, for example, at least one of the following: Timing related to UE RRC connection establishment. Periodic/Aperiodic timing after RRC connection establishment. - Timing based on trigger from MF. - The timing when the UE's movement route is determined/changed/updated. Timing of UE communication requests. - The timing when the UE's required communication quality/service request/QoS indicator/slicing index is determined/changed/updated.
- the MF may receive specific information from other core/NW functions.
- the other core/network functions may be, for example, LMF/SF (Sensing Function).
- the specific information may be, for example, information regarding the UE's position/altitude if the LMF transmits the specific information.
- the specific information may be, for example, information regarding objects detected by sensing (e.g., buildings/obstacles)/communication quality.
- the MF may receive the specific information at a specific time.
- the particular timing may be, for example, at least one of the following: Timing related to UE RRC connection establishment. Periodic/Aperiodic timing after RRC connection establishment. - Timing based on trigger from MF. - The timing when the UE's movement route is determined/changed/updated. Timing of UE communication requests. - The timing when the UE's required communication quality/service request/QoS indicator/slicing index is determined/changed/updated.
- the MF may receive specific information from the UE.
- the UE may report certain information to the MF/NW.
- the specific information may be, for example, information regarding the movement of the UE.
- the information regarding the UE's mobility may be, for example, at least one of the following information: - Information regarding the UE's movement path/speed/altitude. - Information regarding the (current) location/altitude of the UE. - Information about the location/velocity/altitude of the UE (while moving) at each time in the future (e.g. after a certain time period/cycle). - Information regarding the communication quality required in the UE. - Information regarding service requests. - QoS (Quality of Service) indicator. ⁇ Slicing index.
- the specific information may be information notified from the MaaS server.
- the specific information may be, for example, information regarding the UE's position/altitude (if the LMF transmits the specific information).
- the specific information may be, for example, information about objects detected by sensing (e.g., buildings/obstacles)/communication quality (when the SF transmits the specific information).
- the MF may receive the specific information at a specific time.
- the particular timing may be, for example, at least one of the following: Timing related to UE RRC connection establishment. Periodic/Aperiodic timing after RRC connection establishment. - Timing based on trigger from MF. - The timing when the UE's movement route is determined/changed/updated. Timing of UE communication requests. - The timing when the UE's required communication quality/service request/QoS indicator/slicing index is determined/changed/updated.
- the MF may receive certain information from the BS.
- the BS may report specific information to the MF.
- the specific information may be, for example, information regarding the movement of the UE.
- the information regarding the UE's mobility may be, for example, at least one of the following information: - Information regarding the UE's movement path/speed/altitude. - Information regarding the (current) location/altitude of the UE. - Information about the location/velocity/altitude of the UE (while moving) at each time in the future (e.g. after a certain time period/cycle). - Information regarding the communication quality required in the UE. - Information regarding service requests. - QoS (Quality of Service) indicator. ⁇ Slicing index.
- the specific information may be information notified from the MaaS server.
- the specific information may be, for example, information regarding the UE's position/altitude (if the LMF transmits the specific information).
- the specific information may be, for example, information about objects detected by sensing (e.g., buildings/obstacles)/communication quality (when the SF transmits the specific information).
- the specific information may be, for example, information about the BS.
- the information about the BS may be, for example, at least one of the following information: - Information about latency. - Information about jitter. - Information about throughput. - Information regarding the amount of backlog. - Information regarding the number of connected UEs (number of possible connections/number of (current) connections). Resource usage information. - Information regarding the movement of the BS (for example, information indicating whether the BS is a satellite/High Altitude Platform Station (HAPS)/mobile IAB).
- HAPS High Altitude Platform Station
- the MF may receive the specific information at a specific time.
- the particular timing may be, for example, at least one of the following: Timing related to UE RRC connection establishment. Periodic/Aperiodic timing after RRC connection establishment. - Timing based on trigger from MF. - The timing when the UE's movement route is determined/changed/updated. Timing of UE communication requests. - The timing when the UE's required communication quality/service request/QoS indicator/slicing index is determined/changed/updated.
- the second embodiment relates to notification of information from the MF to the UE.
- the MF may transmit/notify specific information to the UE.
- the UE may receive/set/instruct specific information from the MF.
- the particular information may be derived/determined/selected in the MF based on at least one piece of information (information relating to mobility) described in the first embodiment above.
- the specific information may for example be information regarding the BS/cell to which the UE is connected.
- the information about the BS/cell may be, for example, information about the location/area.
- the information regarding the location/area may be, for example, information indicating the correspondence (association) between the location/area and the BS/cell.
- Information indicating the correspondence between location/area and BS/cell may indicate, for example, that in one area (e.g., area A), a connection to cell A is made, and in another area (e.g., area B), a connection to cell B is made (see Figure 4A).
- the number of locations/areas/BSs/cells is not limited to the example shown in FIG. 4A, and may be determined based on at least one of the UE's movement status, UE capabilities, and the MaaS used.
- the information about the BS/cell may be, for example, parameters used in each location/area.
- the parameters may be defined as RRC parameters, for example.
- the UE may be notified that one of the cells is an SpCell.
- the UE may be notified of information indicating the number of BSs/cells to which it can (or will) connect in each location/area.
- the number may be determined, for example, based on the UE capabilities reported by the UE, or based on the communication status/mobility status of the UE.
- (each) location/area may be read as “(each) timing while the UE is moving.”
- the information relating to the BS/cell may be, for example, information relating to conditions for switching the BS/cell to be connected to.
- the information regarding the conditions may be, for example, information indicating the correspondence (association) between BS/cell switching and the corresponding conditions.
- the information indicating the correspondence between BS/cell switching and the corresponding conditions may indicate, for example, that from the initially connected cell, switching to cell A occurs when a certain condition (e.g., condition A) is satisfied, and then switching to cell B occurs when another condition (e.g., condition B) is satisfied (see Figure 4B).
- condition A a certain condition
- condition B another condition
- the number of BSs/cells/conditions is not limited to the example shown in FIG. 4B, and may be determined based on at least one of the UE's movement status, UE capabilities, and the MaaS to be used.
- the corresponding condition may be based on the reception quality of the UE's signal/channel (e.g., RSRP/RSRQ/SINR/CQI/RSSI).
- the UE may determine that the condition is met if the received quality of the signal/channel (e.g., RSRP/RSRQ/SINR/CQI/RSSI) is greater/less than a certain threshold (e.g., X).
- a certain threshold e.g., X
- the particular threshold may be, for example, specified in advance in a specification, or may be notified/configured/instructed to the UE using system information (e.g., SIB)/higher layer signaling (e.g., RRC/MAC CE)/physical layer signaling (e.g., DCI), or may be based on reported UE capability information, or may be specified by a combination of at least two of these.
- SIB system information
- RRC/MAC CE resource control
- the information relating to the BS/cell may be, for example, information/parameters corresponding to pre-operations relating to the destination (post-switching) BS/cell.
- the information/parameters may be, for example, information indicating the execution timing/execution conditions/execution content of the pre-action.
- one set of at least one piece of information described in this embodiment may be notified to the UE, or multiple sets may be notified.
- Each set of information notified to the UE may indicate information about cells related to the UE's movement (e.g., transition of connected cells). For example, each set of information notified to the UE may indicate the order cell A (start cell), cell B, cell C, ..., cell X (end cell).
- the order of the cells may be determined based on at least one of the UE's mobility status, UE capabilities, and the MaaS used.
- the UE may receive at least one of the pieces of information described in the above embodiment 2-1 at a specific timing.
- the particular timing may be, for example, at least one of the following: Timing related to UE RRC connection establishment. Periodic/Aperiodic timing after RRC connection establishment. - The timing when the UE's movement route is determined/changed/updated. Timing of UE communication requests. - The timing when the UE's required communication quality/service request/QoS indicator/slicing index is determined/changed/updated. Timing regarding/corresponding to reporting of information from the UE to the NW (e.g. MF/LMF/SF/MaaS server). Timing for responding to a notification request from a UE to a network of information (e.g., at least one of the pieces of information described in embodiment 2-1).
- a network of information e.g., at least one of the pieces of information described in embodiment 2-1.
- the UE may be operated/controlled to receive at least one of the pieces of information described in embodiment 2-1 above at a timing until a specific time/period (e.g., T) has elapsed based on the specific timing.
- a specific time/period e.g., T
- the particular time/period (e.g., T) may, for example, be predefined in a specification, or may be notified/configured/instructed to the UE using system information (e.g., SIB)/higher layer signaling (e.g., RRC/MAC CE)/physical layer signaling (e.g., DCI), or may be based on reported UE capability information, or may be defined by a combination of at least two of these.
- SIB system information
- RRC/MAC CE resource control protocol
- DCI physical layer signaling
- the third embodiment relates to UE operation.
- the UE may switch/change/determine a connection destination (connecting BS/cell) based on at least one of the pieces of information (hereinafter, specific information) described in the second embodiment above.
- the UE may receive one or more sets of specific information (e.g., BS/cell related information for the UE's movement (e.g., connecting BS/cell transitions)).
- specific information e.g., BS/cell related information for the UE's movement (e.g., connecting BS/cell transitions)).
- the UE may determine/judge the connecting BS/cell based on that one set of information.
- the UE may determine/judge the connecting BS/cell based on one of the sets of information.
- the UE may receive instructions from the MF/NW regarding one set.
- the UE may select/determine information for one set based on the instructions.
- the UE may select/determine information for one set based on certain conditions.
- the particular condition may be, for example, a condition based on at least one of the quality measurement results (of the BS/cell) and the communication requirements.
- the UE may receive commands/instructions each time it switches its connection destination (BS/cell).
- the command/instruction may be, for example, a command/instruction regarding switching between the UE and the source (BS/cell)/destination (BS/cell).
- the command/instruction may be, for example, information indicating whether or not to switch the connection destination.
- the information may have a bit number of, for example, 1 bit.
- a first value for example, 0
- the UE may determine to switch the connection destination (or not to switch the connection destination).
- a second value for example, 1
- the UE may determine to not switch the connection destination (or to switch the connection destination).
- the information may be information that can take two states, for example.
- the two states may be, for example, switching of the connection destination and not switching of the connection destination.
- the information may include information indicating the connection destination, or information indicating the connection destination may be notified to the UE separately (independently) from the information.
- a specific HO may be used for the operation related to switching the connection destination performed by the UE. Note that, for a specific HO (HO method), all operations may be applied, or only some of the operations may be applied.
- the specific HO may be any (all) HO (e.g., DAPS HO/LTM/CHO).
- the UE may decide/judge the HO to use based on at least one of the settings/instructions from the NW, the UE capabilities, and specific rules.
- the specific HO may be a part of the HO (e.g., DAPS HO/LTM/CHO).
- a part of the HO e.g., DAPS HO/LTM/CHO
- DAPS HO/LTM/CHO a part of the HO
- the UE may perform operations (pre-operations) related to the destination before performing connection/switching operations to the destination (connecting BS/cell).
- the UE may control at least one of the connection operation/switching operation and the preliminary operation.
- the UE may determine to perform the pre-action based on at least one of the reception/type/reception timing of the notification information described in the second embodiment above and the determination of the connection destination described in embodiment 3-1 above.
- the pre-actions may be, for example, actions relating to at least one of the following: - (e.g. L1/L3) Measurement. - Reconfigure RRC. - DL/UL synchronization. ⁇ Beam instruction. - Activation/deactivation of cells/cell groups. - Activation/deactivation of TCI state. Random access procedures (e.g. RACH transmissions).
- the UE may determine that the pre-action is to be performed at a specific time.
- the specific timing may be set/instructed, for example, from the network (e.g., BS/MF).
- the UE may determine the specific timing based on the setting/instruction from the network (e.g., BS/MF). Note that the specific timing may differ depending on the operation (e.g., the preliminary operation).
- the specific timing may also be, for example, immediately after HO is executed.
- the UE may determine the specific timing and perform a pre-action based on at least one of a notification from the MF, (the UE's) location information, quality measurement results, and information related to time.
- FIG. 5 is a diagram showing an example of a method for switching operation/pre-operation of a UE in embodiment 3-2.
- BS/cell switching occurs at the cell edge (e.g., during the switching operation possible period) as the UE moves.
- the UE performs pre-operation related to the switching operation at a specific timing other than the timing of the cell switching operation (e.g., at a specific timing within the pre-operation possible period).
- the UE can appropriately connect to and switch between BSs and cells.
- the fourth embodiment relates to UE operation with respect to MF-based mobility functions and other mobility functions.
- An MF-based HO (which may be referred to as a first HO in this disclosure) and a non-MF-based HO (which may be referred to as a second HO in this disclosure) may be defined.
- MF-based HO cell connection/switching
- first HO cell connection/switching
- MoaS Mobility as a Service
- HO based on a service/framework/system involving switching between multiple cells/BSs may be interpreted as interchangeable.
- HO cell connection/switching not based on MF
- second HO cell connection/switching
- HO cell connection/switching not based on Mobility as a Service
- MoaS Mobility as a Service
- HO cell connection/switching not based on a service/framework/system involving switching between multiple cells/BSs
- the UE may be configured/informed of at least one of the first HO and the second HO from the BS/MF.
- the UE may use/apply the configured/notified HO.
- the UE may not use/apply the HO that is not configured/notified.
- the UE may select/decide between the first HO and the second HO based on a specific method.
- the UE may select/decide between the first HO and the second HO based on at least one of a predefined rule, higher layer signaling (e.g., SIB/RRC/MAC CE), and physical layer signaling (e.g., DCI).
- the UE may receive a setting/instruction regarding the preferential application of either the first HO or the second HO.
- the UE may apply this embodiment if certain conditions are met.
- the UE may select/decide the HO to use/apply based on embodiment 4-1 above if certain conditions are not met, and may select/decide a different HO if certain conditions are met.
- the particular condition may be, for example, a condition based on connection/switching using a configured/notified/instructed HO.
- the UE may decide to use/apply another HO if connection/switching using a configured/notified/instructed HO fails.
- the specific condition may be, for example, a condition based on the measurement result/measurement quality for the connection destination using the configured/notified/instructed HO. For example, when the first HO (or the second HO) is configured and the measurement quality for the connection BS/cell based on the first HO falls below a specific threshold (e.g., Y), the UE may decide to apply the second HO (or the first HO).
- a specific threshold e.g., Y
- the particular threshold (e.g., Y) may be, for example, predefined in a specification, or may be notified/configured/instructed to the UE using system information (e.g., SIB)/higher layer signaling (e.g., RRC/MAC CE)/physical layer signaling (e.g., DCI), or may be based on reported UE capability information, or may be defined by a combination of at least two of these.
- SIB system information
- RRC/MAC CE resource control
- the UE may report to the NW (BS/MF) at least one of the execution of the HO, the reason for the HO, and the BS/cell to which the HO was performed.
- NW NW
- the UE may select/decide the HO from the first HO and the second HO based on a condition related to the HO.
- the first condition corresponding to the first HO and the second condition corresponding to the second HO may be defined/set/indicated independently.
- the UE may select/decide between the first HO and the second HO, the HO for which the HO-related conditions are met first.
- the UE When the UE selects/decides/applies/uses HO, it may report to the NW (BS/MF) at least one of the execution of HO, the reason for executing HO, and the BS/cell to which HO is to be performed.
- NW BS/MF
- the report may be made, for example, only if the second HO (or the first HO) selects/decides/applies/uses the HO.
- the UE may perform the pre-operation related to the first HO and the pre-operation related to the second HO in the same time domain.
- the pre-operation related to the first HO and the pre-operation related to the second HO may be performed at least partially (or entirely) in the same time domain.
- the UE may perform the corresponding HO based on pre-actions.
- the UE may use/apply the second HO.
- the first HO and the second HO can be used appropriately, and the connection and communication with the BS/cell can be optimized.
- any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, any information is received from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.
- NW network
- BS base station
- the MAC CE may be identified by including in the MAC subheader a new Logical Channel ID (LCID) that is not specified in existing standards.
- LCID Logical Channel ID
- the notification When the notification is made by a DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.
- RNTI Radio Network Temporary Identifier
- CRC Cyclic Redundancy Check
- notification of any information to the UE in the above-mentioned embodiments may be performed periodically, semi-persistently, or aperiodically.
- notification of any information from the UE (to the NW) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.
- physical layer signaling e.g., UCI
- higher layer signaling e.g., RRC signaling, MAC CE
- a specific signal/channel e.g., PUCCH, PUSCH, PRACH, reference signal
- the MAC CE may be identified by including a new LCID in the MAC subheader that is not specified in existing standards.
- the notification may be transmitted using PUCCH or PUSCH.
- notification of any information from the UE may be performed periodically, semi-persistently, or aperiodically.
- At least one of the above-mentioned embodiments may be applied when a specific condition is met, which may be specified in a standard or may be notified to a UE/BS using higher layer signaling/physical layer signaling.
- At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.
- the specific UE capabilities may indicate at least one of the following: - Supporting specific processing/operations/control/information for at least one of the above embodiments. Support MaaS-informed HO. Number of HOs supported.
- the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities per frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities per subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities per Feature Set (FS) or Feature Set Per Component-carrier (FSPC).
- FR1 Frequency Range 1
- FR2 FR2, FR3, FR4, FR5, FR2-1, FR2-2
- SCS subcarrier Spacing
- FS Feature Set
- FSPC Feature Set Per Component-carrier
- the above-mentioned specific UE capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- At least one of the above-mentioned embodiments may be applied when the UE configures/activates/triggers specific information related to the above-mentioned embodiments (or performs the operations of the above-mentioned embodiments) by higher layer signaling/physical layer signaling.
- the specific information may be any RRC parameters for a specific release (e.g., Rel. 18/19 or later), etc.
- the UE may, for example, apply Rel. 15/16 operations.
- Appendix A A network element having a receiving unit that receives first information regarding mobility at a specific timing, a control unit that determines second information regarding connection and switching of multiple cells based on the first information, and a transmitting unit that transmits the second information to a terminal.
- the first information is at least one of information regarding at least one of the terminal's movement path, speed, and altitude, information regarding at least one of the terminal's position and altitude, information regarding the communication quality required by the terminal, information regarding a service request, a Quality of Service (QoS) indicator, and a slicing index.
- QoS Quality of Service
- the specific timing is at least one of a timing related to a Radio Resource Control (RRC) connection of the terminal, a periodic or non-periodic timing after establishment of an RRC connection, a timing based on a specific trigger, a timing when a movement route of the terminal is determined, a timing related to a communication request of the terminal, and a timing when at least one of a communication quality, a service request, a Quality of Service (QoS) indicator, and a slicing index required for the terminal is determined.
- RRC Radio Resource Control
- QoS Quality of Service
- a network component described in Appendix A-1 or Appendix A-2 The receiving unit receives the first information from at least one of an application layer server, another network function, the terminal, and a base station.
- a network component according to any one of appendices A-1 to A-3.
- Appendix A-5 The network element of any one of Supplementary Note A-1 to Supplementary Note A-4, wherein the second information is composed of one or more sets of information, one of the sets including information regarding the plurality of cells.
- Appendix B With respect to one embodiment of the present disclosure, the following invention is noted.
- Appendix B-1 A terminal having a receiving unit that receives information regarding connection and switching of multiple cells, and a control unit that controls at least one of a first operation regarding the connection and switching of the multiple cells and a second operation performed before the first operation based on the information.
- the information is at least one of information indicating a correspondence between a cell included in the plurality of cells and at least one of a location and an area, a parameter used in at least one of the location and the area, and a parameter related to the second operation.
- the terminal described in Appendix B-1 The terminal described in Appendix B-1.
- the second operation is at least one of an operation related to measurement, an operation related to Radio Resource Control (RRC) reconfiguration, an operation related to synchronization, an operation related to beam indication, an operation related to cell activation, an operation related to Transmission Configuration Indication (TCI) state activation, and an operation related to a random access procedure.
- RRC Radio Resource Control
- TCI Transmission Configuration Indication
- Appendix B-4 When a first cell switching based on a service involving the switching of the multiple cells/BSs and a second cell switching not based on a service involving the switching of the multiple cells/BSs are set, the control unit selects either the first cell switching or the second cell switching based on a specific method.
- a terminal according to any one of Supplementary Note B-1 to Supplementary Note B-3.
- Wired communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
- communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.
- FIG. 6 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- the wireless communication system 1 (which may simply be referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.
- LTE Long Term Evolution
- 3GPP Third Generation Partnership Project
- 5G NR 5th generation mobile communication system New Radio
- the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
- MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.
- RATs Radio Access Technologies
- MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.
- E-UTRA Evolved Universal Terrestrial Radio Access
- EN-DC E-UTRA-NR Dual Connectivity
- NE-DC NR-E-UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
- the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
- the wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).
- dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).
- gNBs NR base stations
- N-DC Dual Connectivity
- the wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged within the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1.
- a user terminal 20 may be located within at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.
- the user terminal 20 may be connected to at least one of the multiple base stations 10.
- the user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).
- CA carrier aggregation
- CC component carriers
- DC dual connectivity
- Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
- Macro cell C1 may be included in FR1
- small cell C2 may be included in FR2.
- FR1 may be a frequency band below 6 GHz (sub-6 GHz)
- FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
- the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication).
- wire e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication e.g., NR communication
- base station 11 which corresponds to the upper station
- IAB Integrated Access Backhaul
- base station 12 which corresponds to a relay station
- the base station 10 may be connected to the core network 30 via another base station 10 or directly.
- the core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the core network 30 may include network functions (Network Functions (NF)) such as, for example, a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM).
- NF Network Functions
- UPF User Plane Function
- AMF Access and Mobility management Function
- SMF Session Management Function
- UDM Unified Data Management
- AF Application Function
- DN Data Network
- LMF Location Management Function
- OAM Operation, Administration and Maintenance
- the user terminal 20 may be a terminal that supports at least one of the communication methods such as LTE, LTE-A, and 5G.
- a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
- OFDM Orthogonal Frequency Division Multiplexing
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the radio access method may also be called a waveform.
- other radio access methods e.g., other single-carrier transmission methods, other multi-carrier transmission methods
- a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- PRACH Physical Random Access Channel
- SIB System Information Block
- PDSCH User data, upper layer control information, System Information Block (SIB), etc.
- SIB System Information Block
- PUSCH User data, upper layer control information, etc.
- MIB Master Information Block
- PBCH Physical Broadcast Channel
- Lower layer control information may be transmitted by the PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.
- DCI Downlink Control Information
- the DCI for scheduling the PDSCH may be called a DL assignment or DL DCI
- the DCI for scheduling the PUSCH may be called a UL grant or UL DCI.
- the PDSCH may be interpreted as DL data
- the PUSCH may be interpreted as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space may be used to detect the PDCCH.
- the CORESET corresponds to the resources to search for DCI.
- the search space corresponds to the search region and search method of PDCCH candidates.
- One CORESET may be associated with one or multiple search spaces. The UE may monitor the CORESET associated with a search space based on the search space configuration.
- a search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set. Note that the terms “search space,” “search space set,” “search space setting,” “search space set setting,” “CORESET,” “CORESET setting,” etc. in this disclosure may be read as interchangeable.
- the PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and a scheduling request (SR).
- UCI uplink control information
- CSI channel state information
- HARQ-ACK Hybrid Automatic Repeat reQuest ACKnowledgement
- ACK/NACK ACK/NACK
- SR scheduling request
- the PRACH may transmit a random access preamble for establishing a connection with a cell.
- downlink, uplink, etc. may be expressed without adding "link.”
- various channels may be expressed without adding "Physical” to the beginning.
- a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted.
- a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.
- the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
- a signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for PBCH) may be called an SS/PBCH block, an SS Block (SSB), etc.
- the SS, SSB, etc. may also be called a reference signal.
- a measurement reference signal Sounding Reference Signal (SRS)
- a demodulation reference signal DMRS
- UL-RS uplink reference signal
- DMRS may also be called a user equipment-specific reference signal (UE-specific Reference Signal).
- the base station 7 is a diagram showing an example of a configuration of a base station according to an embodiment.
- the base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140.
- the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may each be provided in one or more units.
- this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the base station 10 may also be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be configured from a controller, a control circuit, etc., which are described based on a common understanding in the technical field to which this disclosure pertains.
- the control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc.
- the control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc.
- the control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120.
- the control unit 110 may perform call processing of communication channels (setting, release, etc.), status management of the base station 10, management of radio resources, etc.
- the transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123.
- the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
- the transceiver unit 120 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.
- the transceiver 120 may be configured as an integrated transceiver, or may be composed of a transmitter and a receiver.
- the transmitter may be composed of a transmission processing unit 1211 and an RF unit 122.
- the receiver may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.
- the transmitting/receiving antenna 130 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
- the transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
- the transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.
- the transceiver 120 may form at least one of the transmit beam and receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.
- digital beamforming e.g., precoding
- analog beamforming e.g., phase rotation
- the transceiver 120 may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data and control information obtained from the control unit 110 to generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control HARQ retransmission control
- the transceiver 120 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- channel coding which may include error correction coding
- DFT Discrete Fourier Transform
- IFFT Inverse Fast Fourier Transform
- the transceiver unit 120 may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.
- the transceiver unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.
- the transceiver 120 may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.
- reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.
- FFT Fast Fourier Transform
- IDFT Inverse Discrete Fourier Transform
- the transceiver 120 may perform measurements on the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal.
- the measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc.
- RSRP Reference Signal Received Power
- RSSI Received Signal Strength Indicator
- the measurement results may be output to the control unit 110.
- the transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
- devices included in the core network 30 e.g., network nodes providing NF
- other base stations 10, etc. may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
- the transmitting section and receiving section of the base station 10 in this disclosure may be configured with at least one of the transmitting/receiving section 120, the transmitting/receiving antenna 130, and the transmission path interface 140.
- the transceiver 120 may receive first information related to mobility at a specific timing.
- the control unit 110 may determine second information related to multiple cell connection and switching based on the first information.
- the transceiver 120 may transmit the second information to the terminal (first/second embodiment).
- the first information may be at least one of information regarding at least one of the movement path, speed, and altitude of the terminal, information regarding at least one of the position and altitude of the terminal, information regarding the communication quality required by the terminal, information regarding a service request, a QoS (Quality of Service) indicator, and a slicing index (second embodiment).
- the first information may be at least one of information regarding at least one of the movement path, speed, and altitude of the terminal, information regarding at least one of the position and altitude of the terminal, information regarding the communication quality required by the terminal, information regarding a service request, a QoS (Quality of Service) indicator, and a slicing index (second embodiment).
- QoS Quality of Service
- the specific timing may be at least one of the following: a timing related to the Radio Resource Control (RRC) connection of the terminal; a periodic or non-periodic timing after the RRC connection is established; a timing based on a specific trigger; a timing when the movement route of the terminal is determined; a timing related to a communication request of the terminal; and a timing when at least one of the communication quality, service request, QoS (Quality of Service) indicator, and slicing index required for the terminal is determined (first embodiment).
- RRC Radio Resource Control
- the transceiver 120 may receive the first information from at least one of an application layer server, another network function, the terminal, and a base station (first embodiment).
- the second information may be composed of one or more sets of information.
- One of the sets may include information about the multiple cells (second embodiment).
- the transceiver unit 120 may transmit information related to the connection and switching of multiple cells.
- the control unit 110 may use the information to instruct at least one of a first operation related to the connection and switching of multiple cells and a second operation that is performed before the first operation (second and third embodiments).
- the user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the control unit 210, the transceiver unit 220, and the transceiver antenna 230 may each include one or more.
- this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the user terminal 20 may also be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be configured from a controller, a control circuit, etc., which are described based on a common understanding in the technical field to which this disclosure pertains.
- the control unit 210 may control signal generation, mapping, etc.
- the control unit 210 may control transmission and reception using the transceiver unit 220 and the transceiver antenna 230, measurement, etc.
- the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.
- the transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223.
- the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
- the transceiver unit 220 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.
- the transceiver unit 220 may be configured as an integrated transceiver unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
- the reception unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.
- the transmitting/receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
- the transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
- the transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.
- the transceiver unit 220 may form at least one of the transmit beam and receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.
- digital beamforming e.g., precoding
- analog beamforming e.g., phase rotation
- the transceiver 220 may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information acquired from the controller 210, and generate a bit string to be transmitted.
- RLC layer processing e.g., RLC retransmission control
- MAC layer processing e.g., HARQ retransmission control
- the transceiver 220 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- Whether or not to apply DFT processing may be based on the settings of transform precoding.
- the transceiver unit 220 transmission processing unit 2211
- the transceiver unit 220 may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, it is not necessary to perform DFT processing as the above-mentioned transmission processing.
- the transceiver unit 220 may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.
- the transceiver unit 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.
- the transceiver 220 may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
- reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
- the transceiver 220 may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal.
- the measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc.
- the measurement results may be output to the control unit 210.
- the measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources.
- the channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources.
- the measurement unit 223 may derive interference measurements for CSI calculation based on interference measurement resources.
- the interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc.
- CSI-IM may be called CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS.
- CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be read as interchangeable.
- the transmitting unit and receiving unit of the user terminal 20 in this disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.
- the transceiver 220 may receive information related to the connection and switching of multiple cells.
- the control unit 210 may control at least one of a first operation related to the connection and switching of multiple cells and a second operation performed before the first operation based on the information (second and third embodiments).
- the information may be at least one of information indicating the correspondence between a cell included in the plurality of cells and at least one of a location and an area, a parameter used in at least one of the location and the area, and a parameter related to the second operation (second embodiment).
- the second operation may be at least one of an operation related to measurement, an operation related to Radio Resource Control (RRC) reconfiguration, an operation related to synchronization, an operation related to beam indication, an operation related to cell activation, an operation related to Transmission Configuration Indication (TCI) state activation, and an operation related to a random access procedure (third embodiment).
- RRC Radio Resource Control
- TCI Transmission Configuration Indication
- control unit 210 may select either the first cell switching or the second cell switching based on a specific method (fourth embodiment).
- each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.).
- the functional blocks may be realized by combining the one device or the multiple devices with software.
- the functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
- a functional block (component) that performs the transmission function may be called a transmitting unit, a transmitter, and the like. In either case, as mentioned above, there are no particular limitations on the method of realization.
- a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 9 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.
- the above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
- the hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figures, or may be configured to exclude some of the devices.
- processor 1001 may be implemented by one or more chips.
- the functions of the base station 10 and the user terminal 20 are realized, for example, by loading specific software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of the reading and writing of data in the memory 1002 and storage 1003.
- the processor 1001 operates an operating system to control the entire computer.
- the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
- CPU central processing unit
- control unit 110 210
- transmission/reception unit 120 220
- etc. may be realized by the processor 1001.
- the processor 1001 also reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- the programs used are those that cause a computer to execute at least some of the operations described in the above embodiments.
- the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks.
- Memory 1002 is a computer-readable recording medium and may be composed of at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. Memory 1002 may also be called a register, cache, main memory, etc. Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
- ROM Read Only Memory
- EPROM Erasable Programmable ROM
- EEPROM Electrically EPROM
- RAM Random Access Memory
- Memory 1002 may also be called a register, cache, main memory, etc.
- Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
- Storage 1003 is a computer-readable recording medium and may be composed of at least one of a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium.
- Storage 1003 may also be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc.
- the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the above-mentioned transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004.
- the transmitting/receiving unit 120 (220) may be implemented as a transmitting unit 120a (220a) and a receiving unit 120b (220b) that are physically or logically separated.
- the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
- the output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).
- each device such as the processor 1001 and memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
- the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using the hardware.
- the processor 1001 may be implemented using at least one of these pieces of hardware.
- a channel, a symbol, and a signal may be read as mutually interchangeable.
- a signal may also be a message.
- a reference signal may be abbreviated as RS, and may be called a pilot, a pilot signal, or the like depending on the applied standard.
- a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
- a radio frame may be composed of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting a radio frame may be called a subframe.
- a subframe may be composed of one or more slots in the time domain.
- a subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
- the numerology may be a communication parameter that is applied to at least one of the transmission and reception of a signal or channel.
- the numerology may indicate, for example, at least one of the following: SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame configuration, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
- SCS SubCarrier Spacing
- TTI Transmission Time Interval
- radio frame configuration a specific filtering process performed by the transceiver in the frequency domain
- a specific windowing process performed by the transceiver in the time domain etc.
- a slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.).
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may also be a time unit based on numerology.
- a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A.
- a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.
- a radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting a signal.
- a different name may be used for radio frame, subframe, slot, minislot, and symbol. Note that the time units such as frame, subframe, slot, minislot, and symbol in this disclosure may be read as interchangeable.
- one subframe may be called a TTI
- multiple consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI.
- at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
- the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
- TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
- a base station schedules each user terminal by allocating radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) in TTI units.
- radio resources such as frequency bandwidth and transmission power that can be used by each user terminal
- the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
- the time interval e.g., the number of symbols
- the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum time unit of scheduling.
- the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- a TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
- a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
- a short TTI e.g., a shortened TTI, etc.
- TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of numerology, and may be, for example, 12.
- the number of subcarriers included in an RB may be determined based on numerology.
- an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may each be composed of one or more resource blocks.
- one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
- PRB physical resource block
- SCG sub-carrier group
- REG resource element group
- PRB pair an RB pair, etc.
- a resource block may be composed of one or more resource elements (REs).
- REs resource elements
- one RE may be a radio resource area of one subcarrier and one symbol.
- a Bandwidth Part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within the BWP.
- the BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, and symbols are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
- the information, parameters, etc. described in this disclosure may be represented using absolute values, may be represented using relative values from a predetermined value, or may be represented using other corresponding information.
- a radio resource may be indicated by a predetermined index.
- the names used for parameters and the like in this disclosure are not limiting in any respect. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and the various names assigned to these various channels and information elements are not limiting in any respect.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
- information, signals, etc. may be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
- Information, signals, etc. may be input/output via multiple network nodes.
- Input/output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input/output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.
- a specific location e.g., memory
- Input/output information, signals, etc. may be overwritten, updated, or added to.
- Output information, signals, etc. may be deleted.
- Input information, signals, etc. may be transmitted to another device.
- the notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
- the notification of information in this disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals, or a combination of these.
- DCI Downlink Control Information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc.
- the RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
- the MAC signaling may be notified, for example, using a MAC Control Element (CE).
- CE MAC Control Element
- notification of specified information is not limited to explicit notification, but may be implicit (e.g., by not notifying the specified information or by notifying other information).
- the determination may be based on a value represented by a single bit (0 or 1), a Boolean value represented by true or false, or a comparison of numerical values (e.g., with a predetermined value).
- Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
- Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
- a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
- wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
- wireless technologies such as infrared, microwave, etc.
- Network may refer to the devices included in the network (e.g., base stations).
- the antenna port may be interchangeably read as an antenna port for any signal/channel (e.g., a demodulation reference signal (DMRS) port).
- the resource may be interchangeably read as a resource for any signal/channel (e.g., a reference signal resource, an SRS resource, etc.).
- the resource may include time/frequency/code/space/power resources.
- the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.
- the above groups may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.
- CDM Code Division Multiplexing
- RS Reference Signal
- CORESET Control Resource Set
- beam SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable.
- SRI SRS Resource Indicator
- CORESET CORESET pool
- PDSCH PUSCH
- codeword CW
- TB transport block
- RS etc.
- TCI state downlink TCI state
- DL TCI state downlink TCI state
- UL TCI state uplink TCI state
- unified TCI state common TCI state
- joint TCI state etc.
- QCL QCL
- QCL assumptions QCL relationship
- QCL type information QCL property/properties
- specific QCL type e.g., Type A, Type D
- specific QCL type e.g., Type A, Type D
- index identifier
- indicator indication, resource ID, etc.
- sequence list, set, group, cluster, subset, etc.
- TCI state ID the spatial relationship information identifier
- TCI state ID the spatial relationship information
- TCI state the spatial relationship information
- TCI state the spatial relationship information
- TCI state the spatial relationship information
- Base Station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.
- a base station can accommodate one or more (e.g., three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))).
- RRH Remote Radio Head
- the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
- a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control/operate based on the information.
- MS Mobile Station
- UE User Equipment
- a mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc.
- at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
- the moving body in question refers to an object that can move, and the moving speed is arbitrary, and of course includes the case where the moving body is stationary.
- the moving body in question includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and objects mounted on these.
- the moving body in question may also be a moving body that moves autonomously based on an operating command.
- the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned).
- a vehicle e.g., a car, an airplane, etc.
- an unmanned moving object e.g., a drone, an autonomous vehicle, etc.
- a robot manned or unmanned
- at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- FIG. 10 is a diagram showing an example of a vehicle according to an embodiment.
- the vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.
- various sensors including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58
- an information service unit 59 including a communication module 60.
- the drive unit 41 is composed of at least one of an engine, a motor, and a hybrid of an engine and a motor, for example.
- the steering unit 42 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.
- the electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an Input/Output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle.
- the electronic control unit 49 may also be called an Electronic Control Unit (ECU).
- ECU Electronic Control Unit
- Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal of the front wheels 46/rear wheels 47 acquired by a rotation speed sensor 51, an air pressure signal of the front wheels 46/rear wheels 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 58.
- the information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices.
- the information service unit 59 uses information acquired from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.
- various information/services e.g., multimedia information/multimedia services
- the information service unit 59 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
- input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
- output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
- the driving assistance system unit 64 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving load, such as a millimeter wave radar, a Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., a Global Navigation Satellite System (GNSS)), map information (e.g., a High Definition (HD) map, an Autonomous Vehicle (AV) map, etc.), a gyro system (e.g., an Inertial Measurement Unit (IMU), an Inertial Navigation System (INS), etc.), an Artificial Intelligence (AI) chip, and an AI processor, and one or more ECUs that control these devices.
- the driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize a driving assistance function or an autonomous driving function.
- the communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63.
- the communication module 60 transmits and receives data (information) via the communication port 63 between the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 that are provided on the vehicle 40.
- the communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
- the communication module 60 may be located either inside or outside the electronic control unit 49.
- the external device may be, for example, the above-mentioned base station 10 or user terminal 20.
- the communication module 60 may also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it may function as at least one of the base station 10 and user terminal 20).
- the communication module 60 may transmit at least one of the signals from the various sensors 50-58 described above input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication.
- the electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input.
- the PUSCH transmitted by the communication module 60 may include information based on the above input.
- the communication module 60 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle.
- the information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60).
- the communication module 60 also stores various information received from external devices in memory 62 that can be used by the microprocessor 61. Based on the information stored in memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided on the vehicle 40.
- the base station in the present disclosure may be read as a user terminal.
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- the user terminal 20 may be configured to have the functions of the base station 10 described above.
- terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink").
- the uplink channel, downlink channel, etc. may be read as the sidelink channel.
- the user terminal in this disclosure may be interpreted as a base station.
- the base station 10 may be configured to have the functions of the user terminal 20 described above.
- operations that are described as being performed by a base station may in some cases be performed by its upper node.
- a network that includes one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) or a Serving-Gateway (S-GW)), or a combination of these.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation.
- the processing procedures, sequences, flow charts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as there is no inconsistency.
- the methods described in this disclosure present elements of various steps in an exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced
- 4th generation mobile communication system 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG x is, for example, an integer or decimal
- Future Radio Access FX
- GSM Global System for Mobile communications
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi
- IEEE 802.16 WiMAX (registered trademark)
- IEEE 802.20 Ultra-Wide Band (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods, as well as next-generation systems that are expanded, modified, created
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
- determining may encompass a wide variety of actions. For example, “determining” may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking in a table, database, or other data structure), ascertaining, etc.
- Determining may also be considered to mean “determining” receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.
- judgment (decision) may be considered to mean “judging (deciding)” resolving, selecting, choosing, establishing, comparing, etc.
- judgment (decision) may be considered to mean “judging (deciding)” some kind of action.
- judgment (decision) may be read as interchangeably with the actions described above.
- expect may be read as “be expected”.
- "expect(s) " ("" may be expressed, for example, as a that clause, a to infinitive, etc.) may be read as “be expected !.
- "does not expect " may be read as "be not expected ".
- "An apparatus A is not expected " may be read as "An apparatus B other than apparatus A does not expect " (for example, if apparatus A is a UE, apparatus B may be a base station).
- the "maximum transmit power" referred to in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.
- connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connected” may be read as "access.”
- a and B are different may mean “A and B are different from each other.”
- the term may also mean “A and B are each different from C.”
- Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
- timing, time, duration, time instance, any time unit e.g., slot, subslot, symbol, subframe
- period occasion, resource, etc.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
既存のLTE(Rel.14まで)/NR(Rel.18まで)システムにおいて、モビリティに関する以下の様々なフレームワークが導入された:
・ビーム管理(beam management)。
・ビーム障害回復(beam failure recovery)。
・ハンドオーバ(HO)。
将来の無線通信システム(例えば、6G)においては、既存の利用周波数よりさらなる高周波数(例えば、FR3/サブテラHz等)が利用されることが検討されている。また、既存の高周波数(例えば、FR2)のさらなる有効利用を行う必要もある。
NWにおいて、モビリティに関するコア機能が規定されてもよい。
第1の実施形態は、MFにおいて収集される情報に関する。
MFは、特定のサーバから特定の情報を受信してもよい。
・UEの移動経路/速度/高度に関する情報。
・UEの(現在)位置/高度に関する情報。
・将来(例えば、特定の期間/周期経過後)の各タイミングにおける(移動中の)UEの位置/速度/高度に関する情報。
・UEにおいて必要な通信品質に関する情報。
・サービス要求に関する情報。
・QoS(Quality of Service)インディケータ。
・スライシングインデックス。
・UEのRRC接続時(RRC connection establishment)に関するタイミング。
・RRC接続確立後における周期的/非周期的なタイミング。
・MFからのトリガに基づくタイミング。
・UEの移動経路が決定/変更/更新されたタイミング。
・UEの通信要求に関するタイミング。
・UEの必要な通信品質/サービス要求/QoSインディケータ/スライシングインデックスが決定/変更/更新されたタイミング。
MFは、他のコア/NW機能から特定の情報を受信してもよい。
・UEのRRC接続時(RRC connection establishment)に関するタイミング。
・RRC接続確立後における周期的/非周期的なタイミング。
・MFからのトリガに基づくタイミング。
・UEの移動経路が決定/変更/更新されたタイミング。
・UEの通信要求に関するタイミング。
・UEの必要な通信品質/サービス要求/QoSインディケータ/スライシングインデックスが決定/変更/更新されたタイミング。
MFは、UEから特定の情報を受信してもよい。
・UEの移動経路/速度/高度に関する情報。
・UEの(現在)位置/高度に関する情報。
・将来(例えば、特定の期間/周期経過後)の各タイミングにおける(移動中の)UEの位置/速度/高度に関する情報。
・UEにおいて必要な通信品質に関する情報。
・サービス要求に関する情報。
・QoS(Quality of Service)インディケータ。
・スライシングインデックス。
・UEのRRC接続時(RRC connection establishment)に関するタイミング。
・RRC接続確立後における周期的/非周期的なタイミング。
・MFからのトリガに基づくタイミング。
・UEの移動経路が決定/変更/更新されたタイミング。
・UEの通信要求に関するタイミング。
・UEの必要な通信品質/サービス要求/QoSインディケータ/スライシングインデックスが決定/変更/更新されたタイミング。
MFは、BSから特定の情報を受信してもよい。
・UEの移動経路/速度/高度に関する情報。
・UEの(現在)位置/高度に関する情報。
・将来(例えば、特定の期間/周期経過後)の各タイミングにおける(移動中の)UEの位置/速度/高度に関する情報。
・UEにおいて必要な通信品質に関する情報。
・サービス要求に関する情報。
・QoS(Quality of Service)インディケータ。
・スライシングインデックス。
・遅延(latency)に関する情報。
・ジッタ(jitter)に関する情報。
・スループットに関する情報。
・滞留量に関する情報。
・接続UE数(接続可能数/(現在の)接続数)に関する情報。
・リソース使用状況に関する情報。
・BSの移動に関する情報(例えば、BSが衛星(satelite)/HAPS(High Altitude Platform Station)/モバイルIABであるかを示す情報)。
・UEのRRC接続時(RRC connection establishment)に関するタイミング。
・RRC接続確立後における周期的/非周期的なタイミング。
・MFからのトリガに基づくタイミング。
・UEの移動経路が決定/変更/更新されたタイミング。
・UEの通信要求に関するタイミング。
・UEの必要な通信品質/サービス要求/QoSインディケータ/スライシングインデックスが決定/変更/更新されたタイミング。
第2の実施形態は、MFからUEに対する情報の通知に関する。
当該特定の情報は、例えば、UEが接続するBS/セルに関する情報であってもよい。
UEは、上記実施形態2-1に記載される少なくとも1つの情報を、特定のタイミングにおいて受信してもよい。
・UEのRRC接続時(RRC connection establishment)に関するタイミング。
・RRC接続確立後における周期的/非周期的なタイミング。
・UEの移動経路が決定/変更/更新されたタイミング。
・UEの通信要求に関するタイミング。
・UEの必要な通信品質/サービス要求/QoSインディケータ/スライシングインデックスが決定/変更/更新されたタイミング。
・UEからのNW(例えば、MF/LMF/SF/MaaSサーバ)への情報の報告に関する/対応するタイミング。
・UEからのNWに対する情報(例えば、実施形態2-1に記載される少なくとも1つの情報)の通知要求に対応するタイミング。
第3の実施形態は、UE動作に関する。
UEは、上記第2の実施形態に記載される情報(以下、特定の情報)の少なくとも1つに基づいて、接続先(接続BS/セル)の切り替え/変更/決定を行ってもよい。
UEは、接続先(接続BS/セル)に対する接続動作/切り替え動作を行う前に、切り替え先に関連する動作(事前動作)を行ってもよい。
・(例えば、L1/L3)メジャメント。
・RRC再設定。
・DL/UL同期。
・ビーム指示。
・セル/セルグループのアクティベーション/ディアクティベーション。
・TCI状態のアクティベーション/ディアクティベーション。
・ランダムアクセス手順(例えば、RACH送信)。
第4の実施形態は、MFに基づくモビリティ機能と他のモビリティ機能とについてのUE動作に関する。
UEは、BS/MFから、第1のHO及び第2のHOの少なくとも一方を設定/通知されてもよい。
UEは、特定の条件が満たされた場合、本実施形態を適用してもよい。
UEは、第1のHO及び第2のHOのうち、HOに関する条件に基づいてHOを選択/決定してもよい。
[UEへの情報の通知]
上述の実施形態における(ネットワーク(Network(NW))(例えば、基地局(Base Station(BS)))から)UEへの任意の情報の通知(言い換えると、UEにおけるBSからの任意の情報の受信)は、物理レイヤシグナリング(例えば、DCI)、上位レイヤシグナリング(例えば、RRCシグナリング、MAC CE)、特定の信号/チャネル(例えば、PDCCH、PDSCH、参照信号)、又はこれらの組み合わせを用いて行われてもよい。
上述の実施形態におけるUEから(NWへ)の任意の情報の通知(言い換えると、UEにおけるBSへの任意の情報の送信/報告)は、物理レイヤシグナリング(例えば、UCI)、上位レイヤシグナリング(例えば、RRCシグナリング、MAC CE)、特定の信号/チャネル(例えば、PUCCH、PUSCH、PRACH、参照信号)、又はこれらの組み合わせを用いて行われてもよい。
上述の実施形態の少なくとも1つは、特定の条件を満たす場合に適用されてもよい。当該特定の条件は、規格において規定されてもよいし、上位レイヤシグナリング/物理レイヤシグナリングを用いてUE/BSに通知されてもよい。
・上記実施形態の少なくとも1つについての特定の処理/動作/制御/情報をサポートすること。
・MaaS情報に基づくHOをサポートすること。
・サポートするHOの数。
本開示の一実施形態に関して、以下の発明を付記する。
[付記A-1]
モビリティに関する第1の情報を特定のタイミングにおいて受信する受信部と、前記第1の情報に基づいて、複数セルの接続及び切り替えに関する第2の情報を決定する制御部と、前記第2の情報を端末に送信する送信部と、を有するネットワーク構成要素。
[付記A-2]
前記第1の情報は、前記端末の移動経路、速度及び高度の少なくとも1つに関する情報と、前記端末の位置及び高度の少なくとも1つに関する情報と、前記端末において必要とされる通信品質に関する情報と、サービス要求に関する情報と、QoS(Quality of Service)インディケータと、スライシングインデックスと、の少なくとも1つである、付記A-1に記載のネットワーク構成要素。
[付記A-3]
前記特定のタイミングは、前記端末のRadio Resource Control(RRC)接続時に関するタイミングと、RRC接続確立後における周期的又は非周期的なタイミングと、特定のトリガに基づくタイミングと、前記端末の移動経路が決定されたタイミングと、前記端末の通信要求に関するタイミングと、前記端末に必要な通信品質、サービス要求、QoS(Quality of Service)インディケータ、及び、スライシングインデックスの少なくとも1つが決定されたタイミングと、の少なくとも1つである、付記A-1又は付記A-2に記載のネットワーク構成要素。
[付記A-4]
前記受信部は、前記第1の情報を、アプリケーションレイヤのサーバ、他のネットワーク機能、前記端末、及び、基地局、の少なくとも1つから受信する、付記A-1から付記A-3のいずれかに記載のネットワーク構成要素。
[付記A-5]
前記第2の情報は、1つ以上の情報のセットで構成され、前記セットの1つは、前記複数セルに関する情報を含む、付記A-1から付記A-4のいずれかに記載のネットワーク構成要素。
本開示の一実施形態に関して、以下の発明を付記する。
[付記B-1]
複数セルの接続及び切り替えに関する情報を受信する受信部と、前記情報に基づいて、前記複数セルの接続及び切り替えに関する第1の動作と、前記第1の動作の前に行われる第2の動作と、の少なくとも一方を制御する制御部と、を有する端末。
[付記B-2]
前記情報は、前記複数セルに含まれるセルと、位置及びエリアの少なくとも一方と、の対応を示す情報、前記位置及び前記エリアの少なくとも一方において使用されるパラメータ、及び、前記第2の動作に関するパラメータの少なくとも1つである、付記B-1に記載の端末。
[付記B-3]
前記第2の動作は、メジャメントに関する動作、Radio Resource Control(RRC)再設定に関する動作、同期に関する動作、ビーム指示に関する動作、セルのアクティベーションに関する動作、Transmission Configuration Indication(TCI)状態のアクティベーションに関する動作、ランダムアクセス手順に関する動作、の少なくとも1つである、付記B-1又は付記B-2に記載の端末。
[付記B-4]
前記制御部は、前記複数セル/BSの切り替えを伴うサービスに基づく第1のセル切り替えと、前記複数セル/BSの切り替えを伴うサービスに基づかない第2のセル切り替えとが設定される場合、特定の方法に基づいて、前記第1のセル切り替え及び前記第2のセル切り替えのいずれかを選択する、付記B-1から付記B-3のいずれかに記載の端末。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図7は、一実施形態に係る基地局の構成の一例を示す図である。基地局10は、制御部110、送受信部120、送受信アンテナ130及び伝送路インターフェース(transmission line interface)140を備えている。なお、制御部110、送受信部120及び送受信アンテナ130及び伝送路インターフェース140は、それぞれ1つ以上が備えられてもよい。
図8は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- 複数セルの接続及び切り替えに関する情報を受信する受信部と、
前記情報に基づいて、前記複数セルの接続及び切り替えに関する第1の動作と、前記第1の動作の前に行われる第2の動作と、の少なくとも一方を制御する制御部と、を有する端末。 - 前記情報は、前記複数セルに含まれるセルと、位置及びエリアの少なくとも一方と、の対応を示す情報、前記位置及び前記エリアの少なくとも一方において使用されるパラメータ、及び、前記第2の動作に関するパラメータの少なくとも1つである、請求項1に記載の端末。
- 前記第2の動作は、メジャメントに関する動作、Radio Resource Control(RRC)再設定に関する動作、同期に関する動作、ビーム指示に関する動作、セルのアクティベーションに関する動作、Transmission Configuration Indication(TCI)状態のアクティベーションに関する動作、ランダムアクセス手順に関する動作、の少なくとも1つである、請求項1に記載の端末。
- 前記制御部は、前記複数セル/BSの切り替えを伴うサービスに基づく第1のセル切り替えと、前記複数セル/BSの切り替えを伴うサービスに基づかない第2のセル切り替えとが設定される場合、特定の方法に基づいて、前記第1のセル切り替え及び前記第2のセル切り替えのいずれかを選択する、請求項1に記載の端末。
- 複数セルの接続及び切り替えに関する情報を受信するステップと、
前記情報に基づいて、前記複数セルの接続及び切り替えに関する第1の動作と、前記第1の動作の前に行われる第2の動作と、の少なくとも一方を制御するステップと、を有する端末の無線通信方法。 - 複数セルの接続及び切り替えに関する情報を送信する送信部と、
前記情報を用いて、前記複数セルの接続及び切り替えに関する第1の動作と、前記第1の動作の前に行われる第2の動作と、の少なくとも一方を指示する制御部と、を有する基地局。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380099554.9A CN121420603A (zh) | 2023-07-11 | 2023-07-11 | 终端、无线通信方法以及基站 |
| PCT/JP2023/025610 WO2025013207A1 (ja) | 2023-07-11 | 2023-07-11 | 端末、無線通信方法及び基地局 |
| JP2025532294A JPWO2025013207A1 (ja) | 2023-07-11 | 2023-07-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2023/025610 WO2025013207A1 (ja) | 2023-07-11 | 2023-07-11 | 端末、無線通信方法及び基地局 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025013207A1 true WO2025013207A1 (ja) | 2025-01-16 |
Family
ID=94215292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/025610 Pending WO2025013207A1 (ja) | 2023-07-11 | 2023-07-11 | 端末、無線通信方法及び基地局 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2025013207A1 (ja) |
| CN (1) | CN121420603A (ja) |
| WO (1) | WO2025013207A1 (ja) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010239565A (ja) * | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 基地局装置、チャネル割り当て装置、移動局装置、通信システム及び無線通信方法 |
| WO2022084959A1 (en) * | 2020-10-22 | 2022-04-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Enhancements for measurement reporting in non-terrestrial networks |
-
2023
- 2023-07-11 JP JP2025532294A patent/JPWO2025013207A1/ja active Pending
- 2023-07-11 WO PCT/JP2023/025610 patent/WO2025013207A1/ja active Pending
- 2023-07-11 CN CN202380099554.9A patent/CN121420603A/zh active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010239565A (ja) * | 2009-03-31 | 2010-10-21 | Fujitsu Ltd | 基地局装置、チャネル割り当て装置、移動局装置、通信システム及び無線通信方法 |
| WO2022084959A1 (en) * | 2020-10-22 | 2022-04-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Enhancements for measurement reporting in non-terrestrial networks |
Non-Patent Citations (2)
| Title |
|---|
| "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8", 3GPP TS 36.300 V8.12.0, April 2010 (2010-04-01) |
| HUAWEI, HISILICON: "Discussion on L1-RSRP measurement requirements", 3GPP DRAFT; R4-2308328, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 4, no. Incheon, KR; 20230522 - 20230526, 21 May 2023 (2023-05-21), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052484608 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2025013207A1 (ja) | 2025-01-16 |
| CN121420603A (zh) | 2026-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2025155667A (ja) | 端末、無線通信方法及び基地局 | |
| WO2024171382A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2024069804A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025013207A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025013206A1 (ja) | ネットワーク構成要素及び無線通信方法 | |
| WO2025032637A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025032638A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025032639A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025099826A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025099827A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025022617A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025022618A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2024209645A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025079511A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025141782A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025109644A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025141781A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025220062A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2026047930A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025099860A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025105328A1 (ja) | 端末、無線通信方法及び基地局 | |
| JP2025149820A (ja) | 基地局、無線通信方法及び無線通信システム | |
| WO2025215717A1 (ja) | ネットワークノード及び無線通信方法 | |
| WO2025094366A1 (ja) | 端末、無線通信方法及び基地局 | |
| WO2025032767A1 (ja) | 端末、無線通信方法及び基地局 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23945086 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2025532294 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2025532294 Country of ref document: JP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2023945086 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |