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WO2018159798A1 - Station de base radio, et procédé de radiocommunication - Google Patents

Station de base radio, et procédé de radiocommunication Download PDF

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Publication number
WO2018159798A1
WO2018159798A1 PCT/JP2018/007951 JP2018007951W WO2018159798A1 WO 2018159798 A1 WO2018159798 A1 WO 2018159798A1 JP 2018007951 W JP2018007951 W JP 2018007951W WO 2018159798 A1 WO2018159798 A1 WO 2018159798A1
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WO
WIPO (PCT)
Prior art keywords
user device
cell
base station
identification unit
specific
Prior art date
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Ceased
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PCT/JP2018/007951
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English (en)
Japanese (ja)
Inventor
貴之 五十川
尚人 大久保
耕平 清嶋
輝雄 川村
翔 吉田
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NTT Docomo Inc
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NTT Docomo Inc
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Publication date
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Publication of WO2018159798A1 publication Critical patent/WO2018159798A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to a radio base station and a radio communication method for updating the contents of a neighboring cell information table including information on a cell that is a candidate for a handover destination of a user apparatus.
  • LTE including LTE-Advanced LTE-Advanced
  • LTE Long Term Evolution
  • 5G 5th generation mobile mobile communication systems
  • a radio base station In LTE, a radio base station (eNB) has a neighbor cell information table that is a table including information on neighbor cells of the radio base station in order to grasp a handover destination candidate of a user apparatus (UE).
  • a neighbor cell information table is specifically called a Neighbor Relation Table (NRT) (see Non-Patent Document 1, for example).
  • the eNB determines whether or not the handover destination candidate cell reported by the UE is registered in the NRT. If the cell is registered in the NRT, the eNB performs UE handover to the cell.
  • the eNB allows the UE to be handed over to the cell and adds the cell to the NRT (referred to as NRT-less handover). Can do.
  • NRT can be generated autonomously, and NRT management man-hours can be reduced.
  • UEs that perform communication in the sky with good visibility in all directions rather than on the ground, such as UEs installed in drones.
  • a normal UE located on the ground or the like cannot naturally communicate with the distant cell.
  • the eNB may instruct a handover to the distant cell even in a normal UE.
  • the present invention has been made in view of such a situation, and an object thereof is to provide a radio base station and a radio communication method that can reliably identify a user device or the like mounted on a drone.
  • the radio base station updates the contents of the neighboring cell information table including information on cells that are candidates for handover destination of the user apparatus, based on cell information reported from the user apparatus.
  • the radio base station includes: a device identifying unit that identifies whether or not the user device is a specific user device that can execute communication over a plurality of cells; and the user identifying unit and the specific user device by the device identifying unit.
  • a handover control unit that stops adding a cell that is a handover destination candidate reported from the specific user apparatus to the neighboring cell information table when it is identified.
  • the radio communication method updates the contents of a neighboring cell information table including information on cells that are handover destination candidates of the user apparatus based on cell information reported from the user apparatus.
  • the wireless communication method includes a step of identifying whether or not the user device is a specific user device capable of performing communication over a plurality of cells, and when the user device is identified as the specific user device, the specific device A step of canceling addition of a cell as a handover destination candidate reported from the user apparatus to the neighboring cell information table.
  • FIG. 1 is an overall schematic configuration diagram of a wireless communication system 10.
  • FIG. 2 is a functional block configuration diagram of the eNB 100A.
  • FIG. 3 is a functional block configuration diagram of UE 200B.
  • FIG. 4 is a diagram illustrating an operation flow of NRT-less handover by the eNB 100A.
  • FIG. 5 is a diagram illustrating an identification operation flow (operation example 1) of a specific UE.
  • FIG. 6 is a diagram showing a specific UE identification operation flow (operation example 2).
  • FIG. 7 is a diagram illustrating a specific UE identification operation flow (operation example 3).
  • FIG. 8A is a diagram illustrating a configuration example of a neighbor cell information table (NRT).
  • FIG. 8B is a diagram illustrating a configuration example of a neighbor cell information table (NRT).
  • FIG. 9 is a diagram illustrating an example of a hardware configuration of the eNBs 100A to 100C, the UE 200A, and the bag 200B.
  • FIG. 1 is an overall schematic configuration diagram of a radio communication system 10 according to the present embodiment.
  • the radio communication system 10 is a radio communication system according to Long Term Evolution (LTE).
  • LTE Long Term Evolution
  • the radio communication system 10 is not necessarily limited to LTE (E-UTRAN).
  • the radio communication system 10 may be a radio communication system defined as 5G.
  • the radio communication system 10 includes radio base stations 100A to 100C (hereinafter referred to as eNB100A to 100C) and user apparatuses 200A and B200B (hereinafter referred to as UE200A and 200B).
  • eNB100A to 100C radio base stations 100A to 100C
  • UE200A and 200B user apparatuses 200A and B200B
  • ENB100A to 100C, UE200A, and B200B perform wireless communication according to LTE specifications.
  • the eNB 100A forms the cell C1.
  • the eNB 100B forms the cell C2.
  • the eNB 100C forms the cell C3.
  • the eNBs 100A to 100C based on the cell information reported from the UE 200A and the 200B, the neighboring cell information table including information on the cell that is a handover destination candidate of the UE, specifically, the Neighbor Update the contents of Relation Table (NRT).
  • NRT Relation Table
  • UE 200A is a normal UE, and performs radio communication with eNBs 100A to 100C on the ground or the like.
  • the UE 200B is mounted on a small unmanned flying object such as a drone, and performs wireless communication with the eNBs 100A to 100C not only on the ground but also above the cells C1 to C3 (for example, at an altitude of 30 m or more).
  • UE200B comprises a specific user apparatus (specific UE).
  • UE 200A is located in the area where cell C1 and cell C2 are formed and can communicate with cell C1 and cell C2.
  • UE 200A has a poor visibility and cannot communicate with cell C3.
  • UE 200B is located in the sky, has a good line-of-sight with all cells (cells C1 to C3), and can communicate.
  • FIG. 2 is a functional block configuration diagram of the eNB 100A.
  • the eNB 100A includes a radio signal transmission / reception unit 110, a reception state acquisition unit 120, a device identification unit 130, and a handover control unit 140.
  • eNB100B and 100C also have the same configuration as eNB100A.
  • the radio signal transmission / reception unit 110 transmits / receives a radio signal to / from the UE 200B (the same applies to other UEs). Specifically, the radio signal transmission / reception unit 110 transmits / receives various physical channels (control channel and shared channel) in accordance with LTE regulations.
  • the reception state acquisition unit 120 acquires the reception state of the UE 200B. Specifically, the reception state acquisition unit 120 can acquire interference levels in a plurality of cells (cells C1 to C3) including the own cell (for example, the cell C1) to which the UE 200B is connected.
  • the reception state acquisition unit 120 is configured to determine the interference level in the own cell to which the UE 200B is connected (that is, the cell C1) and the neighboring cells (cells C2 and C3) formed in the vicinity of the own cell. To get. Note that the reception state acquisition unit 120 may acquire the interference power itself as the interference level, or perform interference using a ratio such as the signal level of the received signal from the SIR (Signal-to-Interference-Ratio) UE 200B set in the UE 200B. Electric power may be acquired.
  • SIR Signal-to-Interference-Ratio
  • the reception state acquisition unit 120 can acquire the received communication quality at the UE 200B in the plurality of cells. Specifically, the reception state acquisition unit 120 acquires a downlink path loss as the received communication quality in the own cell and neighboring cells to which the UE 200B is connected. Note that the reception state acquisition unit 120 may acquire RSRP (Reference Signal Received Power) that can be a determination index similar to the path loss.
  • RSRP Reference Signal Received Power
  • the device identification unit 130 identifies the type of the UE 200B. Specifically, the device identification unit 130 identifies whether or not the user device (UE) that performs radio communication with the eNB 100A is a specific user device (specific UE) that can perform communication over the plurality of cells.
  • UE user device
  • specific UE specific user device
  • the device identification unit 130 (i) identification using UE's IMEISV (International Mobile Equipment Identity Identity Software Version) or contract type information, (ii) identification by separation of connection destination APN (Access Point Name), And (iii) identification based on a measurement report from the UE can be performed.
  • IMEISV International Mobile Equipment Identity Identity Software Version
  • APN Access Point Name
  • the device identification unit 130 identifies the UE as a specific UE. May be.
  • the device identifying unit 130 may identify the UE as a specific UE when the Reference / Signal / Received / Power (RSRP) in the own cell and the RSRP in the neighboring cell are within a predetermined range.
  • RSRP Reference / Signal / Received / Power
  • the handover control unit 140 controls the handover of the UE 200B. Specifically, the handover control unit 140 determines a cell that is a handover destination candidate of the UE 200B using the neighboring cell information table (NRT). The handover control unit 140 instructs the UE 200B to perform handover to the cell that is the determined handover destination candidate.
  • NRT neighboring cell information table
  • the handover control unit 140 performs handover of the UE to the cell (NRT-less handover) even when the handover destination candidate cell (for example, the cell C2) reported by the UE (for example, the UE 200A) is not registered in the NRT. ) And add the cell to the NRT.
  • the handover destination candidate cell for example, the cell C2
  • the UE for example, the UE 200A
  • the handover control unit 140 stops adding the cell that is the handover destination candidate reported from the specific UE to the neighboring cell information table.
  • the handover control unit 140 does not add the cell C3 to the neighbor cell information table, and does not add to the neighbor cell information table. Do not update the contents of. However, the handover control unit 140 allows the handover of the UE 200B to the cell C3 and instructs the UE 200B to perform the handover to the cell C3.
  • FIG. 3 is a functional block configuration diagram of UE 200B.
  • UE 200B includes a radio signal transmission / reception unit 210, a measurement report unit 220, and a handover execution unit 230.
  • UE 200A is mounted on the drone, it has substantially the same configuration as UE 200B.
  • the radio signal transmitting / receiving unit 210 transmits and receives radio signals to and from the eNBs 100A to 100C. Specifically, the radio signal transmitting / receiving unit 210 transmits / receives various physical channels (control channel and shared channel) in accordance with LTE regulations.
  • the measurement report unit 220 measures the received communication quality in the own cell and neighboring cells to which the UE 200B is connected. In addition, the measurement report unit 220 transmits a measurement report including the measurement result of the measured received communication quality to the connection destination eNB (for example, eNB 100A).
  • eNB for example, eNB 100A
  • the measurement report includes the number of neighboring cells, and RSRP, RSRQ (Reference Signal Received Quality) in the neighboring cells.
  • the handover execution unit 230 executes a handover to another cell of the UE 200B. Specifically, when a cell satisfying a predetermined received communication quality is found among neighboring cells, the handover execution unit 230 sets the cell as a handover destination candidate cell, and connects to the eNB (e.g., eNB100A). )
  • the eNB e.g., eNB100A
  • the UE 200B when the UE 200B is connected to the cell C1 formed by the eNB 100A and the cell C3 satisfies a predetermined reception communication quality, the UE 200B reports the cell C3 as a handover destination candidate cell to the eNB 100A.
  • the handover execution unit 230 executes a handover to a cell (cell C3) that is a handover destination candidate based on a handover instruction from the eNB 100A.
  • FIG. 4 shows an operation flow of NRT-less handover by the eNB 100A.
  • the eNB 100A receives a handover request from the UE (S10).
  • the eNB 100A receives a handover request including a handover destination candidate cell from the UE.
  • the UE is connected to the cell C1.
  • the eNB 100A determines whether or not the UE requesting handover is a specific UE (S20). The determination as to whether or not the UE is a specific UE is performed by any of the functions of the device identification unit 130 described above.
  • identification using UE's IMEISV or contract type information In addition, (i) identification using UE's IMEISV or contract type information, (ii) identification by separation of connection destination APN, and (iii) whether or not a specific UE is based on a measurement report (Measurement Report) from the UE The identification method will be further described later.
  • the eNB 100A determines to cancel the NRT-less handover (S30). In this case, the eNB 100A performs handover to the handover destination candidate cell (S40), but does not add the handover destination candidate cell (for example, the cell C3) to the neighboring cell information table (NRT).
  • the handover destination candidate cell for example, the cell C3
  • the eNB 100A executes an NRT-less handover (S50).
  • the eNB 100A executes handover to the relevant cell even when the handover destination candidate cell (for example, the cell C2) is not registered in the neighboring cell information table (NRT).
  • the handover destination candidate cell for example, the cell C2
  • NRT neighboring cell information table
  • the eNB 100A adds the handover destination candidate cell information to the NRT and updates the NRT (S60).
  • FIG. 8A and 8B show a configuration example of the neighbor cell information table (NRT).
  • NRT neighbor cell information table
  • a cell C1 and a cell C2 are registered.
  • PCI Physical Cell ID
  • the eNB 100A receives a handover request with the cell C3 as a handover destination candidate cell from the UE 200B (specific UE) in a state where such an NRT is held, the eNB 100A registers the cell C3 in the NRT. Absent.
  • the eNB 100A receives a handover request from the UE 200A (normal UE) with the cell C3 as a handover destination candidate cell (here, assuming that the UE 200A shown in FIG. 1 has moved to the cell C3 side), the eNB 100A As shown in FIG. 8B, the cell C3 is registered in the NRT.
  • the eNB 100A is based on (i) identification using UE's IMEISV (International Mobile Equipment Identity Software Version) or contract type information, and (ii) separation of connection destination APN (Access Point Name). Identification and (iii) identification based on a measurement report from the UE can be performed.
  • IMEISV International Mobile Equipment Identity Software Version
  • APN Access Point Name
  • FIG. 5 shows a specific UE identification operation flow (operation example 1).
  • eNB100A acquires IMEISV or contract classification information (S110). Based on IMEISV or contract type information, the type of UE (whether it is a UE installed in a drone or not) can be identified.
  • the eNB 100A determines whether the target UE is a specific UE based on the acquired IMEISV or contract type information (S120).
  • the eNB 100A identifies the UE as the specific UE (S130).
  • FIG. 6 shows a specific UE identification operation flow (operation example 2).
  • operation example 2 shows a specific UE identification operation flow (operation example 2).
  • parts different from the operation example 1 will be mainly described.
  • the eNB 100A separates the network to which the UE is connected, specifically, the APN (Access Point Name) according to the type of the UE (S210). That is, the specific UE is separated into an APN associated with the specific UE. Thereby, the classification of UE (whether it is UE mounted in the drone etc.) can be identified.
  • APN Access Point Name
  • S220 and S230 are the same as S120 and S130.
  • FIG. 7 shows a specific UE identification operation flow (operation example 3). Hereinafter, parts different from the operation example 1 will be mainly described.
  • eNB100A acquires the measurement report (Measurement Report) transmitted from UE (S310).
  • the eNB 100A determines whether or not the acquired measurement report includes measurement results for a predetermined number (N) or more of cells (S320). Further, the eNB 100A determines whether or not the difference between the RSRP (Reference Signal Received Power) of the neighboring cell and the RSRP of the own cell is equal to or less than a predetermined value based on the acquired measurement report (S330).
  • N predetermined number
  • S320 Reference Signal Received Power
  • the eNB 100A sets the UE as the specific UE. Identify (S340).
  • eNB100A eNB100B, 100C
  • UE200A, 200B user apparatus
  • NRT neighboring cell information table
  • NRT-less handover is executed, and a handover destination candidate cell is registered in the NRT.
  • an appropriate NRT can be generated autonomously.
  • the UE when the interference level or path loss (reception communication quality) in the plurality of cells acquired by the reception state acquisition unit 120 is within a predetermined range, the UE is identified as a specific UE.
  • interference levels interference power
  • path loss in multiple cells are within a predetermined range (for example, within xdBm (in the case of interference power), Or, when there is a high possibility that it is within ydB (in the case of path loss), it is possible to identify the UE 200B as a specific UE and limit NRT-less handover.
  • eNB100A can identify the said UE from specific UE, when the information of a predetermined number or more cells is contained in the measurement report reported from UE. Also, the eNB 100A can identify the UE as a specific UE when the RSRP in the own cell to which the UE is connected and the RSRP in a neighboring cell formed in the vicinity (periphery) of the own cell are within a predetermined range.
  • the specific UE can be identified by estimating that the UE is the specific UE based on the measurement result of the received communication quality in the UE. Thereby, it is possible to identify whether or not the UE is a specific UE while conforming to the actual communication environment.
  • the UE 200B is mounted on the drone, but the UE 200B does not necessarily have to be mounted on the flying object such as the drone. That is, the present invention can also be applied to a normal user device.
  • the user apparatus can execute communication in the sky over a plurality of cells, specifically, when the line-of-sight with the plurality of cells is good and the path loss in the downlink from the plurality of cells is small, The NRT-less handover described above may be canceled.
  • the user apparatus MTC-UE
  • “can perform communication over a plurality of cells” is not limited to a flying object such as a drone, but may include performing communication in a specific place such as a high building with good visibility.
  • “in the sky” includes that the user device is located in a place with good visibility, such as a high place, unlike a user device that performs communication at a position that is normally used by humans.
  • each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by the plurality of devices.
  • FIG. 9 is a diagram illustrating an example of a hardware configuration of the apparatus.
  • the apparatus may be configured as a computer apparatus including a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007, and the like.
  • Each functional block (see FIGS. 2 and 3) of the device is realized by any hardware element of the computer device or a combination of the hardware elements.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the memory 1002 is a computer-readable recording medium and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code) that can execute the method according to the above-described embodiment, a software module, and the like.
  • the storage 1003 is a computer-readable recording medium such as an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disc, a magneto-optical disc (eg a compact disc, a digital versatile disc, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the recording medium described above may be, for example, a database including a memory 1002 and / or a storage 1003, a server, or other suitable medium.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, or the like) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.
  • notification of information includes physical layer signaling (eg, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (eg, RRC signaling, MAC (Medium Access Control) signaling, broadcast information (MIB ( Master (Information Block), SIB (System Information Block)), other signals, or combinations thereof, and RRC signaling may also be referred to as RRC messages, eg, RRC Connection Connection message, RRC It may be a Connection ⁇ ⁇ Reconfiguration message.
  • RRC messages eg, RRC Connection Connection message, RRC It may be a Connection ⁇ ⁇ Reconfiguration message.
  • input / output information may be stored in a specific location (for example, a memory) or may be managed by a management table.
  • the input / output information can be overwritten, updated, or appended.
  • the output information may be deleted.
  • the input information may be transmitted to other devices.
  • the specific operation that is performed by the eNB 100A may be performed by another network node (device). Further, the function of the eNB 100A may be provided by a combination of a plurality of other network nodes.
  • a channel and / or symbol may be a signal (signal) if there is a corresponding description.
  • the signal may be a message.
  • system and “network” may be used interchangeably.
  • the parameter or the like may be represented by an absolute value, may be represented by a relative value from a predetermined value, or may be represented by other corresponding information.
  • the radio resource may be indicated by an index.
  • ENB100A base station
  • base station can accommodate one or a plurality of (for example, three) cells (also referred to as sectors).
  • a base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, indoor small base station RRH: Remote Radio Head) can also provide communication services.
  • RRH Remote Radio Head
  • cell refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage.
  • base station eNB
  • cell ector
  • a base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, small cell, and the like.
  • UE200A, 200B is 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, It may also be referred to as a wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using designations such as “first”, “second”, etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.
  • the above-described wireless base station and wireless communication method are useful because it is possible to reliably identify the user device mounted on the drone.
  • Wireless communication system 100A ⁇ 100C eNB 110 Radio signal transmission / reception unit 120 Reception status acquisition unit 130 Device identification unit 140 Handover control unit 200A, 200B UE 210 Radio signal transmission / reception unit 220 Measurement report unit 230 Handover execution unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus C1 to C3 cells

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un eNB (100A) comprenant : une unité d'émission-réception de signal radio (110) qui envoie des signaux radio à un équipement d'utilisateur, et en reçoit de celui-ci ; et une unité d'identification d'équipement (130) qui distingue si l'équipement d'utilisateur est ou non un équipement d'utilisateur spécifique apte à communiquer dans l'espace aérien d'une pluralité de cellules. L'unité d'identification d'équipement (130) distingue si l'équipement d'utilisateur est ou non un équipement d'utilisateur spécifique sur la base d'informations d'identification prescrites qui ont été acquises.
PCT/JP2018/007951 2017-03-03 2018-03-02 Station de base radio, et procédé de radiocommunication Ceased WO2018159798A1 (fr)

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JP2017041050A JP2018148376A (ja) 2017-03-03 2017-03-03 無線基地局及び無線通信方法

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