WO2024166324A1 - 無線基地局、無線中継装置、移動体、無線通信システム、無線通信方法、及びプログラム - Google Patents

無線基地局、無線中継装置、移動体、無線通信システム、無線通信方法、及びプログラム Download PDF

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Publication number
WO2024166324A1
WO2024166324A1 PCT/JP2023/004450 JP2023004450W WO2024166324A1 WO 2024166324 A1 WO2024166324 A1 WO 2024166324A1 JP 2023004450 W JP2023004450 W JP 2023004450W WO 2024166324 A1 WO2024166324 A1 WO 2024166324A1
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WO
WIPO (PCT)
Prior art keywords
wireless
relay device
base station
terminal device
wireless relay
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.)
Ceased
Application number
PCT/JP2023/004450
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English (en)
French (fr)
Japanese (ja)
Inventor
優 大▲高▼
裕介 大井
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Honda Motor Co Ltd
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Honda Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to PCT/JP2023/004450 priority Critical patent/WO2024166324A1/ja
Priority to EP23921155.0A priority patent/EP4664962A4/en
Priority to JP2024576017A priority patent/JPWO2024166324A1/ja
Priority to CN202380092044.9A priority patent/CN120569999A/zh
Publication of WO2024166324A1 publication Critical patent/WO2024166324A1/ja
Priority to US19/290,272 priority patent/US20250358666A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • 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
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0009—Control or signalling for completing the hand-off for a plurality of users or terminals, e.g. group communication or moving wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/005—Moving wireless networks
    • 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
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to a wireless base station, a wireless relay device, a mobile object, a wireless communication system, a wireless communication method, and a program.
  • Patent Documents 1 to 5 describe techniques relating to mobile communications.
  • Patent Document 1 Japanese Patent No. 6207397
  • Patent Document 2 Japanese Patent No. 5365738
  • Patent Document 3 Japanese Patent Publication No. 2020-099032
  • Patent Document 4 Japanese Patent No. 7119215
  • Patent Document 5 Japanese Patent Publication No. 2017-169197
  • the present application can improve the stability of communications in a mobile object equipped with a wireless relay device. This can in turn further improve traffic safety and contribute to the development of a sustainable transportation system.
  • a wireless relay device relays communication between a terminal device and a wireless base station.
  • the wireless relay device includes a control unit that acquires a measurement result of communication quality in the wireless relay device.
  • the wireless relay device includes a communication unit that transmits measurement information indicating the measurement result of the communication quality to the wireless base station.
  • the communication unit further receives setting information regarding the setting of the wireless relay device from the wireless base station in response to the transmission of the measurement information to the wireless base station.
  • the control unit further controls the operation of the wireless relay device based on the setting information received from the wireless base station.
  • control unit may further generate first setting information regarding the setting of the terminal device based on the setting information when the control unit receives the setting information from the wireless base station.
  • the communication unit may further transmit the first setting information to the terminal device.
  • the communication unit may further receive measurement information from the terminal device that indicates a measurement result of communication quality in the terminal device.
  • the control unit may further generate second setting information regarding the settings of the terminal device based on the measurement information received from the terminal device.
  • the communication unit may further transmit the second setting information to the terminal device.
  • control unit may further generate third setting information regarding the settings of the terminal device.
  • the communication unit may further transmit the third setting information to the terminal device.
  • the third setting information may include at least one of setting information for placing the terminal device within the range of the wireless relay device and setting information for causing the terminal device to prioritize communication with the wireless relay device.
  • a mobile object in a second aspect, includes any one of the wireless relay devices described above.
  • a program in a third aspect, causes a computer to function as any one of the wireless relay devices described above.
  • a wireless communication system includes any one of the wireless relay devices described above and the wireless base station.
  • a wireless base station communicates with a terminal device via a wireless relay device.
  • the wireless base station includes a communication unit that receives first measurement information indicating a measurement result of communication quality in the terminal device.
  • the wireless base station includes a control unit that generates first setting information regarding the setting of the terminal device and second setting information regarding the setting of the wireless relay device based on the first measurement information.
  • the communication unit further transmits the first setting information to the terminal device and transmits the second setting information to the wireless relay device.
  • the communication unit may further receive second measurement information indicating a measurement result of communication quality in the wireless relay device.
  • the control unit may further generate third setting information regarding the setting of the wireless relay device based on the second measurement information.
  • the communication unit may further transmit the third setting information to the wireless relay device.
  • control unit may further generate fourth setting information regarding the setting of the terminal device based on at least one of the second measurement information and the third setting information.
  • the communication unit may further transmit the fourth setting information to the terminal device.
  • a wireless communication system includes any one of the wireless base stations described above and the wireless relay device.
  • a program in a seventh aspect, causes a computer to function as any one of the wireless base stations described above.
  • a wireless communication method is provided.
  • the wireless communication method is executed by a wireless relay device that relays communication between a terminal device and a wireless base station.
  • the wireless communication method includes a step of acquiring a measurement result of communication quality in the wireless relay device.
  • the wireless communication method includes a step of transmitting measurement information indicating the measurement result of the communication quality to the wireless base station.
  • the wireless communication method includes a step of receiving setting information regarding the setting of the wireless relay device from the wireless base station in response to the transmission of the measurement information to the wireless base station.
  • the wireless communication method includes a step of controlling an operation of the wireless relay device based on the setting information received from the wireless base station.
  • a wireless communication method is provided.
  • the wireless communication method is executed by a wireless base station that communicates with a terminal device via a wireless relay device.
  • the wireless communication method includes a step of receiving first measurement information indicating a measurement result of communication quality in the terminal device.
  • the wireless communication method includes a step of generating first setting information regarding a setting of the terminal device and second setting information regarding a setting of the wireless relay device based on the first measurement information.
  • the wireless communication method includes a step of transmitting the first setting information to the terminal device and transmitting the second setting information to the wireless relay device.
  • 1 illustrates a schematic configuration of a wireless communication system 5 according to an embodiment.
  • 2 shows an example of a system configuration of a wireless relay device 110.
  • 2 shows an example of a system configuration of a wireless base station 120.
  • 1 shows an example of a sequence relating to a wireless communication method executed in the wireless communication system 5.
  • 1 shows an example of a sequence relating to a wireless communication method executed in the wireless communication system 5.
  • 1 shows an example of a sequence relating to a wireless communication method executed in the wireless communication system 5.
  • 1 shows an example of a sequence relating to a wireless communication method executed in the wireless communication system 5.
  • 2 illustrates an example computer 2000 upon which embodiments of the present invention may be implemented in whole or in part.
  • FIG. 1 shows a schematic configuration of a wireless communication system 5 according to one embodiment.
  • the wireless communication system 5 includes wireless base stations 120a, 120b, and 120c, wireless relay devices 110a and 110b, mobile units 100a and 100b, and terminal devices 140a, 140b, and 140c.
  • the wireless base stations 120a, 120b, and 120c may be collectively referred to as "wireless base stations 120" with the suffixes of their reference symbols omitted.
  • the wireless relay devices 110a and 110b may be collectively referred to as “wireless relay devices 110” with the suffixes of their reference symbols omitted.
  • the mobile units 100a and 100b may be collectively referred to as “mobile units 100” with the suffixes of their reference symbols omitted.
  • the terminal devices 140a, 140b, and 140c may be collectively referred to as "terminal devices 140" with the suffixes of their reference symbols omitted.
  • the wireless base station 120 is a mobile communication base station that supports one or more mobile communication methods.
  • the wireless relay device 110 and the terminal device 140 are wireless communication devices that support one or more mobile communication methods.
  • the mobile communication methods supported by the wireless base station 120, the wireless relay device 110, and the terminal device 140 may be, for example, mobile communication methods used in mobile communication systems such as the fourth generation mobile communication system (4G) and the fifth generation mobile communication system (5G).
  • the wireless base stations 120 are base stations fixed to specific locations. Each of the wireless base stations 120 forms a cell, and by forming the cell, performs wireless communication with the wireless relay device 110 and the terminal device 140.
  • cell 180a is a cell formed by wireless base station 120a
  • cell 180b is a cell formed by wireless base station 120b
  • cell 180c is a cell formed by wireless base station 120c.
  • cell 180a, cell 180b, and cell 180c may be collectively referred to as "cell 180" with the suffixes of the reference numbers omitted.
  • the wireless relay device 110 has a function for providing services to the terminal device 140 as a wireless base station, and also has a function for receiving services from the wireless base station 120 as a terminal device.
  • the wireless relay device 110 relays communications between the terminal device 140 and the wireless base station 120.
  • the terminal device 140 can access the core network via the wireless base station 120. Even if the terminal device 140 cannot directly communicate wirelessly with the wireless base station 120, it may be possible for the terminal device 140 to access the core network via the wireless relay device 110 and the wireless base station 120.
  • the mobile body 100 is a mobile device.
  • the mobile body 100 is, for example, a vehicle such as a bus or an automobile, or a train.
  • a vehicle is an example of a transportation device.
  • the mobile body 100 may be various types of aircraft including unmanned aerial vehicles, an artificial satellite, a ship, etc.
  • the mobile body 100a is equipped with a wireless relay device 110a.
  • the mobile body 100b is equipped with a wireless relay device 110b. Therefore, the wireless relay device 110a can move together with the mobile body 100a, and the wireless relay device 110b can move together with the mobile body 100b.
  • the wireless relay device 110a relays communication between the wireless base station 120a and a terminal device 140a carried by a user in the mobile unit 100a. Furthermore, the wireless relay device 110a relays communication between the wireless base station 120a and a terminal device 140c located in the vicinity of the wireless relay device 110a.
  • the wireless relay device 110b relays communication between the wireless base station 120b and a terminal device 140b carried by a user in the mobile unit 100b.
  • the wireless relay device 110 measures the communication quality of the wireless communication in the wireless relay device 110 and transmits the measurement result to the wireless base station 120. Furthermore, the wireless relay device 110 controls the operation of the wireless relay device 110 based on setting information regarding the setting of the wireless relay device 110 received from the wireless base station 120. For example, the wireless relay device 110 performs processing related to handover, processing related to changing the settings for the terminal device 140, processing related to roaming, etc. This makes it possible for the wireless relay device 110 to receive appropriate services from the wireless base station 120 as a terminal device while retaining the function of providing services to the terminal device 140 as a wireless base station.
  • FIG. 2 shows an example of the system configuration of the wireless relay device 110.
  • the wireless relay device 110 relays communications between the wireless base station 120 and the terminal device 140.
  • the wireless relay device 110 includes a control unit 200, a storage unit 210, and a communication unit 220.
  • the control unit 200 controls the entire wireless relay device 110.
  • the communication unit 220 is responsible for wireless communication between the wireless base station 120 and the terminal device 140.
  • the control unit 200 is realized by an arithmetic processing device including a processor.
  • the storage unit 210 is realized by including a non-volatile storage medium.
  • the control unit 200 performs processing using information stored in the storage unit 210.
  • the control unit 200 may be realized by a microcomputer including a CPU, ROM, RAM, I/O, a bus, etc.
  • the wireless relay device 110 may be realized by a computer.
  • the wireless relay device 110 may be realized by a single computer.
  • the wireless relay device 110 may be realized by multiple computers.
  • the functions of the wireless relay device 110 may be realized by a virtual system realized using virtualization technology.
  • the control unit 200 acquires the measurement results of the communication quality in the wireless relay device 110.
  • the communication unit 220 transmits measurement information indicating the measurement results of the communication quality to the wireless base station 120.
  • the communication unit 220 further receives setting information regarding the settings of the wireless relay device 110 from the wireless base station 120.
  • the control unit 200 further controls the operation of the wireless relay device 110 based on the setting information received from the wireless base station 120.
  • control unit 200 When the control unit 200 receives setting information from the wireless base station 120, the control unit 200 generates first setting information regarding the setting of the terminal device 140 based on the setting information.
  • the communication unit 220 further transmits the first setting information to the terminal device 140.
  • the communication unit 220 further receives measurement information indicating the measurement results of the communication quality at the terminal device 140 from the terminal device 140.
  • the control unit 200 further generates second setting information regarding the settings of the terminal device 140 based on the measurement information received from the terminal device 140.
  • the communication unit 220 further transmits the second setting information to the terminal device 140.
  • the control unit 200 may further generate third setting information regarding the settings of the terminal device 140.
  • the communication unit 220 may further transmit the third setting information to the terminal device 140.
  • the third setting information may include at least one of setting information for placing the terminal device 140 within the range of the wireless relay device 110 and setting information for causing the terminal device 140 to prioritize communication with the wireless relay device 110.
  • FIG. 3 shows an example of the system configuration of the wireless base station 120.
  • the wireless base station 120 communicates with terminal devices via the wireless relay device 110 and includes a control unit 300, a storage unit 310, and a communication unit 320.
  • the control unit 300 controls the entire wireless base station 120.
  • the communication unit 320 is responsible for wireless communication between the wireless relay device 110 and the terminal device 140.
  • the control unit 300 is realized by an arithmetic processing device including a processor.
  • the storage unit 310 is realized by including a non-volatile storage medium.
  • the control unit 300 performs processing using information stored in the storage unit 310.
  • the control unit 300 may be realized by a microcomputer including a CPU, ROM, RAM, I/O, a bus, etc.
  • the wireless base station 120 may be realized by a computer.
  • the wireless base station 120 may be realized by a single computer.
  • the wireless base station 120 may be realized by multiple computers.
  • the functions of the wireless base station 120 may be realized by a virtual system realized using virtualization technology.
  • the communication unit 320 receives first measurement information indicating the measurement result of communication quality in the terminal device 140.
  • the control unit 300 generates first setting information regarding the setting of the terminal device and second setting information regarding the setting of the wireless relay device 110 based on the first measurement information.
  • the communication unit 320 further transmits the first setting information to the terminal device and transmits the second setting information to the wireless relay device 110.
  • the communication unit 320 further receives second measurement information indicating the measurement result of the communication quality in the wireless relay device 110.
  • the control unit 300 further generates third setting information regarding the setting of the wireless relay device 110 based on the second measurement information.
  • the communication unit 320 further transmits the third setting information to the wireless relay device 110.
  • the control unit 300 further generates fourth setting information regarding the settings of the terminal device 140 based on at least one of the second measurement information and the third setting information.
  • the communication unit 320 further transmits the fourth setting information to the terminal device.
  • FIG. 4 shows an example of a sequence relating to a wireless communication method executed in the wireless communication system 5.
  • the control unit 200 of the wireless relay device 110 determines that the communication quality satisfies a predetermined judgment condition based on the measurement result of the communication quality in the wireless relay device 110
  • the control unit 200 generates measurement information indicating the measurement result
  • the communication unit 220 transmits the measurement information to the wireless base station 120.
  • the measurement information may include information indicating the communication quality of the serving cell and the communication quality of the adjacent cell measured in the wireless relay device 110.
  • control unit 300 of the wireless base station 120 generates configuration information regarding the settings of the wireless relay device 110 based on the measurement information received in S11, and the communication unit 320 transmits the configuration information to the wireless relay device 110.
  • control unit 200 of the wireless relay device 110 generates setting information regarding the settings of the terminal device 140 based on the setting information received in S12, and the communication unit 220 transmits the setting information to the terminal device 140.
  • the setting information transmitted in S12 may be information for changing the settings of the wireless relay device 110 in response to a change in communication quality in the wireless relay device 110 or a handover of the wireless relay device 110.
  • the setting information transmitted in S12 may be information for changing a judgment condition for judging whether or not to perform subsequent measurement and reporting of communication quality in the wireless relay device 110 in response to the change in communication quality or handover.
  • the setting information transmitted to the terminal device 140 in S13 may be information for changing the settings of the terminal device 140 in response to a change in communication quality in the wireless relay device 110 or a handover of the wireless relay device 110.
  • the setting information transmitted in S13 may be information for changing a judgment condition for judging whether or not to perform subsequent measurement and reporting of communication quality in the terminal device 140.
  • the setting information transmitted in S13 may include cell identification information of a cell to which the wireless relay device 110 is handed over.
  • the terminal device 140 determines that the communication quality satisfies a predetermined judgment condition based on the measurement result of the communication quality in the terminal device 140
  • the terminal device 140 generates measurement information indicating the measurement result and transmits the measurement information to the wireless relay device 110.
  • the measurement information may include information indicating the communication quality of the serving cell and the communication quality of the adjacent cell measured in the terminal device 140.
  • the control unit 200 of the wireless relay device 110 generates setting information regarding the settings of the terminal device 140 based on the measurement information received in S21, and the communication unit 220 transmits the setting information to the terminal device 140.
  • the setting information transmitted to the terminal device 140 in S22 may be information for changing the settings of the terminal device 140 in response to a change in the communication quality of the terminal device 140 or a handover of the terminal device 140.
  • the setting information transmitted in S22 may be information for changing the judgment conditions for judging whether or not to perform subsequent measurement and reporting of communication quality in the terminal device 140.
  • the measurement information transmitted in S11 and S21 may be a Measurement Report message.
  • the configuration information transmitted in S12, S13, and S22 may be an RRC_Connection_Reconfiguration message.
  • the measurement information transmitted in S11 and S21 and the configuration information transmitted in S12, S13, and S22 may be transmitted using the U-Plane instead of the C-Plane. According to the sequence shown in FIG. 4, even if the radio wave conditions in the wireless relay device 110 change due to the movement of the mobile object 100, etc., it is possible to provide an appropriate procedure for the wireless relay device 110 to maintain its function as a relay device.
  • the case where the wireless relay device 110 transmits the setting information as in S13 is not limited to the case where the wireless relay device 110 receives the setting information from the wireless base station 120 as in FIG. 4.
  • the control unit 200 of the wireless relay device 110 may generate setting information for allowing the terminal device 140, which is in the range of the wireless relay device 110, to remain in the range of the wireless relay device 110 for a longer period of time, and the communication unit 220 may transmit the setting information to the terminal device 140.
  • the control unit 200 may determine a higher determination condition to make handover less likely to occur, and the communication unit 220 may include the determination condition in the setting information and transmit it to the terminal device 140.
  • the control unit 200 may also generate setting information for setting the in-range priority for the wireless relay device 110 to "high", and the communication unit 220 may transmit the setting information to the terminal device 140.
  • the control unit 200 may generate setting information for prioritizing communication with the wireless relay device 110.
  • the control unit 200 may generate setting information for setting a high QoS priority for content provided to the terminal device 140 when the terminal device 140 is within the range of the wireless relay device 110, and the communication unit 220 may transmit the setting information to the terminal device 140.
  • FIG. 5 shows an example of a sequence related to a wireless communication method executed in wireless communication system 5.
  • the sequence in FIG. 5 differs from the sequence in FIG. 4 in that it is a sequence in which control is mainly performed by wireless base station 120.
  • the control unit 200 of the wireless relay device 110 determines that the communication quality satisfies a predetermined judgment condition based on the measurement result of the communication quality in the wireless relay device 110, the control unit 200 generates measurement information indicating the measurement result, and the communication unit 220 transmits the measurement information to the wireless base station 120.
  • the measurement information may include information indicating the communication quality of the serving cell and the communication quality of the adjacent cell measured in the wireless relay device 110.
  • control unit 300 of the wireless base station 120 generates setting information for the wireless relay device 110 based on the measurement information received in S31, and the communication unit 320 transmits the setting information to the wireless relay device 110.
  • the processing of S31 and S32 is the same as the processing of S11 and S12.
  • the control unit 300 of the wireless base station 120 in S33, the control unit 300 of the wireless base station 120 generates setting information for the settings of the terminal device 140 based on at least one of the measurement information received in S31 or the setting information transmitted in S32, and the communication unit 320 transmits the setting information to the terminal device 140.
  • the terminal device 140 determines that the communication quality satisfies a predetermined judgment condition based on the measurement result of the communication quality in the terminal device 140
  • the terminal device 140 generates measurement information indicating the measurement result and transmits the measurement information to the wireless base station 120.
  • the measurement information may include information indicating the communication quality of the serving cell and the communication quality of the adjacent cell measured in the terminal device 140.
  • the control unit 300 of the wireless base station 120 generates setting information for the setting of the wireless relay device 110 based on the measurement information received in S41, and the communication unit 320 transmits the setting information to the wireless relay device 110. Furthermore, in S43, the control unit 300 generates setting information for the setting of the terminal device 140, and the communication unit 320 transmits the setting information to the terminal device 140.
  • the setting information transmitted to the wireless relay device 110 in S42 may be information for changing the setting of the wireless relay device 110 in response to a change in communication quality in the terminal device 140 or a handover of the terminal device 140.
  • the setting information transmitted in S42 may be information for changing a judgment condition for judging whether or not to perform subsequent measurement and reporting of communication quality in the wireless relay device 110.
  • the setting information transmitted in S42 may include information indicating the change in communication quality in the terminal device 140 or the terminal identification information of the terminal device 140 in which a handover has occurred.
  • the measurement information transmitted in S31 and S41 may be a Measurement Report message.
  • the configuration information transmitted in S32, S33, S42, and S43 may be an RRC_Connection_Reconfiguration message.
  • the measurement information transmitted in S31 and S41 and the configuration information transmitted in S32, S33, S42, and S43 may be transmitted using the U-Plane instead of the C-Plane. According to the sequence shown in FIG. 5, even if the radio wave conditions in the wireless relay device 110 change due to the movement of the mobile unit 100, etc., it is possible to provide a procedure that is executed under the initiative of the wireless base station 120 so that the wireless relay device 110 maintains its function as a relay device.
  • FIG. 6 shows an example of a sequence related to a wireless communication method executed in the wireless communication system 5.
  • the sequence in FIG. 6 shows a sequence in the case where roaming occurs in response to a change in communication quality in the wireless relay device 110.
  • the wireless base station 120 takes the lead in performing control. Therefore, in S51, S52, and S53 in FIG. 6, processing similar to that of S31, S32, and S33 in FIG. 5 is performed, respectively, and roaming processing is performed in S54.
  • the setting information transmitted in S52 and the setting information transmitted in S53 may include information indicating the roaming source and roaming destination.
  • FIG. 7 shows an example of a sequence related to a wireless communication method executed in the wireless communication system 5.
  • the sequence in FIG. 7 shows a sequence in the case where roaming occurs in response to a change in communication quality in the terminal device 140.
  • the wireless base station 120 takes the lead in performing control. Therefore, in S61, S62, and S63 in FIG. 7, processing similar to that of S41, S42, and S43 in FIG. 5 is performed, respectively, and roaming processing is performed in S64.
  • the setting information transmitted in S62 and the setting information transmitted in S63 may include information indicating the roaming source and roaming destination.
  • the wireless communication system 5 described above even if the radio wave conditions at the wireless relay device 110 change due to the movement of the mobile object 100, etc., it is possible to provide an appropriate procedure for the wireless relay device 110 to maintain its function as a relay device. Furthermore, even if the radio wave conditions change at the terminal device 140 for which the wireless relay device 110 is providing a service as a base station, it is possible to provide an appropriate procedure for the wireless relay device 110 to execute as a base station. This makes it possible to improve the stability of communication by the wireless relay device 110, and ultimately to increase the safety of traffic on the mobile object 100.
  • FIG. 8 shows an example of a computer 2000 in which multiple embodiments of the present invention may be embodied in whole or in part.
  • a program installed on the computer 2000 may cause the computer 2000 to function as a system or each part of a system according to an embodiment, or various devices such as a wireless base station and a wireless relay device, or each part of the devices, perform operations associated with the system or each part of the system or the devices or each part of the devices, and/or perform a process or steps of the process according to an embodiment.
  • Such a program may be executed by the CPU 2012 to cause the computer 2000 to perform specific operations associated with some or all of the blocks of the processing procedures and block diagrams described in this specification.
  • the computer 2000 includes a CPU 2012 and a RAM 2014, which are interconnected by a host controller 2010.
  • the computer 2000 also includes a ROM 2026, a flash memory 2024, a communication interface 2022, and an input/output chip 2040.
  • the ROM 2026, the flash memory 2024, the communication interface 2022, and the input/output chip 2040 are connected to the host controller 2010 via the input/output controller 2020.
  • the CPU 2012 operates according to the programs stored in the ROM 2026 and RAM 2014, thereby controlling each unit.
  • the communication interface 2022 communicates with other electronic devices via a network.
  • the flash memory 2024 stores programs and data used by the CPU 2012 in the computer 2000.
  • the ROM 2026 stores programs such as a boot program executed by the computer 2000 upon activation, and/or programs that depend on the hardware of the computer 2000.
  • the input/output chip 2040 may also connect various input/output units such as a keyboard, mouse, and monitor to the input/output controller 2020 via input/output ports such as a serial port, a parallel port, a keyboard port, a mouse port, a monitor port, a USB port, an HDMI port, etc.
  • the programs are provided via a computer-readable storage medium such as a CD-ROM, DVD-ROM, or memory card, or via a network.
  • RAM 2014, ROM 2026, or flash memory 2024 are examples of computer-readable storage media.
  • the programs are installed in flash memory 2024, RAM 2014, or ROM 2026, and executed by CPU 2012. Information processing described in these programs is read by computer 2000, and brings about cooperation between the programs and the various types of hardware resources described above.
  • An apparatus or method may be constructed by realizing the operation or processing of information according to the use of computer 2000.
  • CPU 2012 may execute a communication program loaded into RAM 2014 and instruct communication interface 2022 to perform communication processing based on the processing described in the communication program.
  • communication interface 2022 reads transmission data stored in a transmission buffer processing area provided in a recording medium such as RAM 2014 or flash memory 2024, transmits the read transmission data to the network, and writes received data received from the network to a reception buffer processing area or the like provided on the recording medium.
  • the CPU 2012 may also cause all or a necessary portion of a file or database stored in a recording medium such as a flash memory 2024 to be read into the RAM 2014, and perform various types of processing on the data in the RAM 2014. The CPU 2012 then writes the processed data back to the recording medium.
  • a recording medium such as a flash memory 2024
  • Various types of information such as various types of programs, data, tables, and databases, may be stored on the recording medium and subjected to information processing.
  • the CPU 2012 may execute various types of processing on the data read from the RAM 2014, including various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, information search/replacement, etc., as described herein and specified by the instruction sequence of the program, and writes back the results to the RAM 2014.
  • the CPU 2012 may also search for information in a file, database, etc. in the recording medium.
  • the CPU 2012 may search for an entry that matches a condition, in which an attribute value of the first attribute is specified, from among the multiple entries, read the attribute value of the second attribute stored in the entry, and thereby obtain the attribute value of the second attribute associated with the first attribute that satisfies a predetermined condition.
  • the above-described programs or software modules may be stored in a computer-readable storage medium on the computer 2000 or in the vicinity of the computer 2000.
  • a recording medium such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet can be used as the computer-readable storage medium.
  • the programs stored in the computer-readable storage medium may be provided to the computer 2000 via the network.
  • a program installed in computer 2000 that causes computer 2000 to function as wireless relay device 110 may act on CPU 2012, etc., to cause computer 2000 to function as each part of wireless relay device 110.
  • the information processing described in these programs is loaded into computer 2000, it functions as each part of wireless relay device 110, which is a concrete means in which software and the various hardware resources described above work together. These concrete means then realize calculations or processing of information according to the intended use of computer 2000 in this embodiment, thereby constructing a unique wireless relay device 110 according to the intended use.
  • a program installed in computer 2000 that causes computer 2000 to function as wireless base station 120 may act on CPU 2012 and the like to cause computer 2000 to function as each part of wireless base station 120.
  • the information processing described in these programs is loaded into computer 2000, it functions as each part of wireless base station 120, which is a concrete means in which software and the various hardware resources described above work together. These concrete means then realize calculations or processing of information according to the intended use of computer 2000 in this embodiment, thereby constructing a unique wireless base station 120 according to the intended use.
  • each block may represent (1) a stage of a process where an operation is performed or (2) a portion of an apparatus responsible for performing an operation.
  • Particular stages and portions may be implemented by dedicated circuitry, programmable circuitry provided with computer-readable instructions stored on a computer-readable storage medium, and/or a processor provided with computer-readable instructions stored on a computer-readable storage medium.
  • Dedicated circuitry may include digital and/or analog hardware circuitry, and may include integrated circuits (ICs) and/or discrete circuits.
  • Programmable circuitry may include reconfigurable hardware circuitry, including logic AND, logic OR, logic XOR, logic NAND, logic NOR, and other logic operations, memory elements such as flip-flops, registers, field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), and the like.
  • reconfigurable hardware circuitry including logic AND, logic OR, logic XOR, logic NAND, logic NOR, and other logic operations, memory elements such as flip-flops, registers, field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), and the like.
  • a computer-readable storage medium may include any tangible device capable of storing instructions that are executed by a suitable device, such that the computer-readable storage medium having instructions stored thereon constitutes at least a portion of a product that includes instructions that can be executed to provide a means for performing the operations specified in a process or block diagram.
  • Examples of computer-readable storage media may include electronic storage media, magnetic storage media, optical storage media, electromagnetic storage media, semiconductor storage media, and the like.
  • Computer-readable storage media may include floppy disks, diskettes, hard disks, random access memories (RAMs), read-only memories (ROMs), erasable programmable read-only memories (EPROMs or flash memories), electrically erasable programmable read-only memories (EEPROMs), static random access memories (SRAMs), compact disk read-only memories (CD-ROMs), digital versatile disks (DVDs), Blu-ray (RTM) disks, memory sticks, integrated circuit cards, and the like.
  • RAMs random access memories
  • ROMs read-only memories
  • EPROMs or flash memories erasable programmable read-only memories
  • EEPROMs electrically erasable programmable read-only memories
  • SRAMs static random access memories
  • CD-ROMs compact disk read-only memories
  • DVDs digital versatile disks
  • RTM Blu-ray
  • the computer readable instructions may include either assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including object-oriented programming languages such as Smalltalk (registered trademark), JAVA (registered trademark), C++, etc., and conventional procedural programming languages such as the "C" programming language or similar programming languages.
  • ISA instruction set architecture
  • machine instructions machine-dependent instructions
  • microcode firmware instructions
  • state setting data or source or object code written in any combination of one or more programming languages, including object-oriented programming languages such as Smalltalk (registered trademark), JAVA (registered trademark), C++, etc., and conventional procedural programming languages such as the "C" programming language or similar programming languages.
  • Computer-readable instructions may be provided to a processor or programmable circuitry of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, either locally or over a wide area network (WAN) such as a local area network (LAN), the Internet, etc., to execute the computer-readable instructions to provide a means for performing operations specified in the process steps or block diagrams described.
  • WAN wide area network
  • LAN local area network
  • processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers, etc.
  • Wireless communication system 100 Mobile object 110 Wireless relay device 120 Wireless base station 140 Terminal device 180 Cell 200 Control unit 210 Storage unit 220 Communication unit 300 Control unit 310 Storage unit 320 Communication unit 2000 Computer 2010 Host controller 2012 CPU 2014 RAM 2020 Input/Output Controller 2022 Communication Interface 2024 Flash Memory 2026 ROM 2040 Input/Output Chip

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/JP2023/004450 2023-02-09 2023-02-09 無線基地局、無線中継装置、移動体、無線通信システム、無線通信方法、及びプログラム Ceased WO2024166324A1 (ja)

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PCT/JP2023/004450 WO2024166324A1 (ja) 2023-02-09 2023-02-09 無線基地局、無線中継装置、移動体、無線通信システム、無線通信方法、及びプログラム
EP23921155.0A EP4664962A4 (en) 2023-02-09 2023-02-09 Wireless base station, wireless repeater device, mobile body, wireless communication system, wireless communication method and program
JP2024576017A JPWO2024166324A1 (https=) 2023-02-09 2023-02-09
CN202380092044.9A CN120569999A (zh) 2023-02-09 2023-02-09 无线基站、无线中继装置、移动体、无线通信系统、无线通信方法和程序
US19/290,272 US20250358666A1 (en) 2023-02-09 2025-08-04 Wireless base station, wireless relay device, mobile body, wireless communication system, and wireless communication method

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US20250358666A1 (en) 2025-11-20
EP4664962A1 (en) 2025-12-17

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