WO2022185942A1 - リレーノード及び基地局 - Google Patents
リレーノード及び基地局 Download PDFInfo
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- WO2022185942A1 WO2022185942A1 PCT/JP2022/006391 JP2022006391W WO2022185942A1 WO 2022185942 A1 WO2022185942 A1 WO 2022185942A1 JP 2022006391 W JP2022006391 W JP 2022006391W WO 2022185942 A1 WO2022185942 A1 WO 2022185942A1
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- base station
- relay node
- interface
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- communication processing
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- 238000004891 communication Methods 0.000 claims abstract description 120
- 238000000034 method Methods 0.000 claims description 58
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- 238000012790 confirmation Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 description 12
- 230000004048 modification Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 2
- 102100022734 Acyl carrier protein, mitochondrial Human genes 0.000 description 1
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- 230000008901 benefit Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/03—Reselecting a link using a direct mode connection
- H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
-
- 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]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
-
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
Definitions
- This disclosure relates to relay nodes and base stations.
- a mobile communication technology has been proposed in the 3GPP (3rd Generation Partnership Project) and standardized as a Technical Specification (TS). Especially now, 5G (5th Generation) technology has been proposed and standardized.
- Non-Patent Document 1 and Non-Patent Document 2 a relay mounted on a vehicle is being studied, and the relay is a mobile base station relay (MBSR) and/or a vehicle mounted relay (vehicle mounted relay). relay).
- the mobile base station relay communicates with the donor base station via the Uu interface and communicates with user equipment (UE) via the Uu interface.
- UE user equipment
- Non-Patent Document 1 describes that a UE handover may occur between a donor base station and a relay.
- Non-Patent Document 1 Since the relay described in Non-Patent Document 1 only communicates with the donor base station as a UE over the Uu interface, the relay for handover of the UE between the relay and the donor base station And the inventor found the problem that the donor base station cannot perform normal handover procedures.
- An object of the present disclosure is to provide a relay node and a base station that enable handover procedures for UE handover between the base station and the relay.
- a relay node includes a first communication processing unit that communicates with a first base station via a Uu interface as a user equipment, and one or more users via the Uu interface as a second base station. and a second communication processing unit that communicates with the device.
- the first communication processing unit communicates with the first base station as the second base station via an interface between base stations.
- a first base station communicates with the first base station via a Uu interface as user equipment, and communicates with one or more user equipment via a Uu interface as a second base station.
- a communication processing unit that communicates with a communicating relay node; The communication processing unit communicates with the relay node acting as the user equipment via the Uu interface, and communicates with the relay node acting as the second base station via the inter-base station interface.
- the present disclosure it is possible to perform a handover procedure for UE handover between the base station and the relay. It should be noted that the present disclosure may provide other effects instead of or in addition to the above effects.
- FIG. 1 is a diagram showing an example of a schematic configuration of a system according to an embodiment of the present disclosure
- Figure 3 illustrates an example relay node and user equipment according to embodiments of the present disclosure
- 1 illustrates an example architecture including a system according to embodiments of the present disclosure
- FIG. 3 is a block diagram showing an example of a schematic functional configuration of a relay node according to an embodiment of the present disclosure
- FIG. 2 is a block diagram showing an example of a schematic hardware configuration of a relay node according to an embodiment of the present disclosure
- FIG. 2 is a block diagram showing an example of a schematic functional configuration of a base station according to an embodiment of the present disclosure
- FIG. 2 is a block diagram showing an example of a schematic hardware configuration of a base station according to an embodiment of the present disclosure
- FIG. 4 is a flow chart for explaining a first example of a schematic flow of an Xn setup procedure according to an embodiment of the present disclosure
- FIG. 4 is a flow chart for explaining a second example of a schematic flow of an Xn setup procedure according to an embodiment of the present disclosure
- FIG. 4 is a flow chart for explaining a second example of a schematic flow of an Xn setup procedure according to an embodiment of the present disclosure.
- Figure 4 illustrates an example user plane protocol for the Uu interface between a relay node and a UE according to embodiments of the present disclosure
- Figure 4 illustrates an example control plane protocol for the Uu interface between a relay node and a UE in accordance with embodiments of the present disclosure
- Figure 4 illustrates an example user plane protocol for the Uu interface between a relay node and a base station according to embodiments of the present disclosure
- Figure 4 illustrates an example control plane protocol for the Uu interface between a relay node and a base station in accordance with embodiments of the present disclosure
- Figure 4 illustrates an example user plane protocol for the Xn interface between a relay node and a base station according to embodiments of the present disclosure
- Figure 4 illustrates an example control plane protocol for the Xn interface between a relay node and a base station in accordance with embodiments of the present disclosure
- 1 is a diagram for explaining a first example of handover according to an embodiment of
- FIG. 4 is a flow chart for explaining a first example of a handover procedure according to an embodiment of the present disclosure
- FIG. 4 is a diagram for explaining a second example of handover according to an embodiment of the present disclosure
- FIG. 4 is a flow chart for explaining a second example of a handover procedure according to an embodiment of the present disclosure
- FIG. 4 is a flow chart for explaining a second example of a handover procedure according to an embodiment of the present disclosure
- FIG. 1 An example configuration of a system 1 according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 3.
- FIG. 1 An example configuration of a system 1 according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 3.
- FIG. 1 An example configuration of a system 1 according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 3.
- FIG. 1 An example configuration of a system 1 according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 3.
- system 1 includes relay node 100, base station 200, UE30 and UE40.
- System 1 is a system conforming to 3GPP TS. More specifically, for example, the system 1 is a system conforming to 5G or NR (New Radio) TS.
- Relay node 100 The relay node 100 relays data and control information between base stations and UEs.
- the relay node 100 operates as a UE. Specifically, for example, when the relay node 100 is located within the coverage area of the base station 200, it is connected as a UE to the base station 200 and communicates with the base station 200 via the Uu interface.
- the relay node 100 also operates as a base station. Specifically, for example, one or more UEs are connected to the relay node 100, and the relay node 100, as a base station, communicates with the one or more UEs via the Uu interface.
- UE 30 is connected to relay node 100, and relay node 100, as a base station, communicates with UE 30 via the Uu interface.
- the base station 200 may be called a first base station
- the relay node 100 (or the base station function of the relay node 100) may be called a second base station. In this case, relay node 100 communicates with UE 30 as the second base station.
- the relay node 100 is a mobile relay node. More specifically, for example, the relay node 100 is a device that can be mounted on a mobile object.
- the moving object is a vehicle
- the relay node 100 is an in-vehicle device.
- the relay node 100 is an ECU (Electronic Control Unit).
- ECU Electronic Control Unit
- relay node 100 is mounted on vehicle 10 and UE 30 is located within vehicle 10 . For example, in this way, relay node 100 is not installed at a specific location, but moves.
- the relay node 100 may be called a mobile base station relay (MBSR) or a vehicle-mounted relay.
- MBSR mobile base station relay
- vehicle-mounted relay a mobile base station relay
- Base station 200 The base station 200 is a node of a radio access network (RAN) and communicates with UEs located within the coverage area of the base station 200 via the Uu interface.
- RAN radio access network
- UE 40 is connected to base station 200, and base station 200 communicates with UE 40 via the Uu interface.
- the relay node 100 is connected as a UE to the base station 200, and the base station 200 communicates with the relay node 100 via the Uu interface.
- the base station 200 is a gNB.
- a gNB is a node that provides NR user plane and control plane protocol terminations towards the UE and is connected to the 5GC (5G Core Network) via the NG interface.
- base station 200 may be an en-gNB.
- An en-gNB is a node that provides NR user plane and control plane protocol termination for UEs and acts as a secondary node in EN-DC (E-UTRA-NR Dual Connectivity).
- the base station 200 may be called a donor base station. More specifically, base station 200 may be referred to as a donor gNB.
- the relay node 100 is the MBSR node and the base station 200 is the MBSR donor gNB.
- the MBSR node (relay node 100) has UE functionality and gNB functionality.
- inter-base station interface eg, Xn interface
- MBSR node relay node 100
- MBSR donor gNB base station 200
- the relay node 100 includes a first wireless communication unit 110 , a second wireless communication unit 120 , a network communication unit 130 , a storage unit 140 and a processing unit 150 .
- the first wireless communication unit 110 wirelessly transmits and receives signals.
- the first wireless communication unit 110 receives signals from other devices and transmits signals to the other devices.
- the other device is the base station 200 .
- the second wireless communication unit 120 wirelessly transmits and receives signals.
- the second wireless communication unit 120 receives signals from other devices and transmits signals to the other devices.
- the other device is the UE30.
- the network communication unit 130 receives signals from the network to which the relay node 100 is connected, and transmits signals to the network.
- the relay node 100 may be an in-vehicle device mounted on the vehicle 10, and the network may be an in-vehicle LAN (Local Area Network).
- the network includes various sensors (e.g., driving condition sensors, etc.), various ECUs (e.g., engine control ECU, driving support ECU, etc.), operation switches, display devices, and the like. may be connected.
- the storage unit 140 stores various information for the relay node 100.
- the processing unit 150 provides various functions of the relay node 100.
- the processing section 150 includes a first communication processing section 151 and a second communication processing section 153 .
- the processing unit 150 may further include components other than these components. That is, the processing unit 150 can perform operations other than those of these components. Specific operations of the first communication processing unit 151 and the second communication processing unit 153 will be described in detail later.
- the processing unit 150 (specifically, the first communication processing unit 151) communicates with another device (eg, the base station 200) via the first wireless communication unit 110.
- the processing unit 150 (specifically, the second communication processing unit 153) communicates with another device (eg, the UE 30) via the second wireless communication unit 120.
- the processing unit 150 communicates with other devices connected to the network via the network communication unit 130 .
- the relay node 100 if the relay node 100 is not connected to the network, the relay node 100 does not have to include the network communication unit 130 .
- relay node 100 includes antenna 181 , RF (Radio Frequency) circuit 183 , antenna 185 , RF circuit 187 , processor 189 , network interface 191 , memory 193 and storage 195 .
- RF Radio Frequency
- Each of the antennas 181 and 185 converts signals into radio waves and radiates the radio waves into space. Also, each of the antennas 181 and 185 receives radio waves in space and converts the radio waves into signals.
- Antenna 181 and antenna 185 may each include a transmit antenna and a receive antenna, or may be a single antenna for transmission and reception. Each of antenna 181 and antenna 185 may be a directional antenna and may include multiple antenna elements.
- the RF circuit 183 performs analog processing of signals transmitted and received via the antenna 181 .
- RF circuit 187 performs analog processing of signals transmitted and received via antenna 185 .
- Each of RF circuitry 183 and RF circuitry 187 may include high frequency filters, amplifiers, modulators, low pass filters, and the like.
- the processor 189 performs digital processing of signals transmitted and received via the antenna 181 and the RF circuit 183. Processor 189 also performs digital processing of signals transmitted and received via antenna 185 and RF circuit 187 . In addition, processor 189 processes signals sent and received via network interface 191 .
- Processor 189 may include multiple processors or may be a single processor. The multiple processors may include one or more baseband processors that perform the digital processing and one or more processors that perform other processing.
- the network interface 191 is, for example, a network adapter.
- Processor 189 communicates with devices connected to the network via network interface 191 .
- the memory 193 stores programs executed by the processor 189, parameters related to the programs, and various other information.
- the memory 193 may include at least one of ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), RAM (Random Access Memory), and flash memory. All or part of memory 193 may be included within processor 189 .
- the storage 195 stores various information.
- the storage 195 may include at least one of SSD (Solid State Drive) and HDD (Hard Disc Drive).
- the first wireless communication unit 110 may be implemented by an antenna 181 and an RF circuit 183.
- the second radio communication section 120 may be implemented with an antenna 185 and an RF circuit 187 .
- Network communication unit 130 may be implemented by network interface 191 .
- Storage unit 140 may be implemented by storage 195 .
- Processing unit 150 may be implemented by processor 189 and memory 193 .
- the relay node 100 may not have the network interface 191 .
- the relay node 100 includes a memory that stores a program and one or more memory that executes the program to operate the first communication processing unit 151 and the second communication processing unit 153.
- a processor For example, the memory is memory 193 and the one or more processors is processor 189 .
- the above program is a program for causing a computer to execute the operations of the first communication processing unit 151 and the second communication processing unit 153 .
- the base station 200 includes a wireless communication unit 210, a network communication unit 220, a storage unit 230 and a processing unit 240.
- FIG. 6 the base station 200 includes a wireless communication unit 210, a network communication unit 220, a storage unit 230 and a processing unit 240.
- the wireless communication unit 210 wirelessly transmits and receives signals.
- the radio communication unit 210 receives signals from UEs and transmits signals to the UEs.
- the network communication unit 220 receives signals from the network and transmits signals to the network.
- the storage unit 230 stores various information for the base station 200.
- the processing unit 240 provides various functions of the base station 200.
- the processing unit 240 includes a communication processing unit 241 .
- the processing unit 240 may further include components other than the communication processing unit 241 . That is, the processing unit 240 can also perform operations other than the operations of the communication processing unit 241 . A specific operation of the communication processing unit 241 will be described later in detail.
- the processing unit 240 (communication processing unit 241) communicates with the UE (for example, the UE 40 or the relay node 100) via the wireless communication unit 210.
- the processing unit 240 communicates with other nodes (for example, core network nodes) via the network communication unit 220 .
- base station 200 comprises antenna 281 , RF circuitry 283 , network interface 285 , processor 287 , memory 289 and storage 291 .
- the antenna 281 converts the signal into radio waves and radiates the radio waves into space. Also, the antenna 281 receives radio waves in space and converts the radio waves into signals.
- Antenna 281 may include a transmit antenna and a receive antenna, or may be a single antenna for transmission and reception. Antenna 281 may be a directional antenna and may include multiple antenna elements.
- the RF circuit 283 performs analog processing of signals transmitted and received via the antenna 281 .
- RF circuitry 283 may include high frequency filters, amplifiers, modulators, low pass filters, and the like.
- the network interface 285 is, for example, a network adapter, which transmits signals to and receives signals from the network.
- the processor 287 performs digital processing of signals transmitted and received via the antenna 281 and the RF circuit 283. Processor 287 also processes signals sent and received via network interface 285 .
- Processor 287 may include multiple processors or may be a single processor. The multiple processors may include a baseband processor that performs the digital processing and one or more processors that perform other processing.
- the memory 289 stores programs executed by the processor 287, parameters related to the programs, and various other information.
- Memory 289 may include at least one of ROM, EPROM, EEPROM, RAM, and flash memory. All or part of memory 289 may be included within processor 287 .
- the storage 291 stores various information.
- the storage 291 may include at least one of SSD and HDD.
- the wireless communication unit 210 may be implemented by an antenna 281 and an RF circuit 283.
- Network communication unit 220 may be implemented by network interface 285 .
- Storage unit 230 may be implemented by storage 291 .
- Processing unit 240 may be implemented by processor 287 and memory 289
- a part or all of the processing unit 240 may be virtualized. In other words, part or all of the processing unit 240 may be implemented as a virtual machine. In this case, part or all of the processing unit 240 may operate as a virtual machine on a physical machine (that is, hardware) including a processor, memory, etc. and a hypervisor.
- the base station 200 may include a memory for storing programs (ie, memory 289) and one or more processors (ie, processor 287) capable of executing the programs.
- the one or more processors may execute the program to perform the operation of the processing unit 240 .
- the program may be a program for causing the processor to execute the operation of the processing unit 240 .
- the relay node 100 (first communication processing unit 151) communicates with the base station 200 via the Uu interface as a UE.
- the base station 200 (communication processing unit 241) communicates with the relay node 100 operating as a UE via the Uu interface.
- the relay node 100 (second communication processing unit 153) communicates with one or more UEs via the Uu interface as a base station.
- the one or more UEs include UE30.
- the relay node 100 (first communication processing unit 151) communicates with the base station 200 as a base station via the inter-base station interface.
- the base station 200 (communication processing unit 241) communicates with the relay node 100 operating as a base station via the inter-base station interface.
- the interface between base stations is the Xn interface.
- the relay node 100 (first communication processing unit 151) performs a setup procedure for an interface between base stations with the base station 200 as a base station.
- the base station 200 (communication processing unit 241) and the relay node 100 operating as a base station perform setup procedures for an inter-base station interface.
- the setup procedure is the Xn setup procedure.
- the relay node 100 to communicate with the base station 200 via the inter-base station interface (eg, Xn interface).
- the inter-base station interface eg, Xn interface
- the relay node 100 transmits information indicating that the UE is a relay node (hereinafter referred to as "relay instruction information") as a UE.
- the relay instruction information is transmitted to the base station 200, and the base station 200 (communication processing unit 241) receives the relay instruction information from the relay node 100 operating as the UE.
- the relay indication information may indicate that the UE is an MBSR, or may indicate that the UE is a vehicle-mounted relay.
- the relay node 100 (first communication processing unit 151) may transmit the relay instruction information to the base station 200 during or after the procedure for establishing connection to the base station 200. .
- the relay node 100 (first communication processing unit 151) may transmit the relay instruction information to the base station 200 in response to generation of first user data.
- the base station 200 (communication processing unit 241) performs the setup procedure with the relay node 100 operating as a base station in response to receiving the relay instruction information.
- the setup procedure is the Xn setup procedure.
- the base station 200 (communication processing unit 241) transmits an XN SETUP REQUEST message to the relay node 100 (S310), relay node 100 (first communication processing unit 151) receives the XN SETUP REQUEST message from the base station 200.
- the relay node 100 (first communication processing unit 151) transmits the XN SETUP RESPONSE message to the base station 200 (S320), and the base station 200 (communication processing unit 241) transmits the XN SETUP RESPONSE message from the relay node 100. receive.
- the relay indication information can trigger the inter-base station interface setup procedure (eg, Xn setup procedure).
- the relay node 100 may initiate the setup procedure (eg, Xn setup procedure) by itself without transmitting the relay instruction information. good.
- the relay node 100 may transmit an XN SETUP REQUEST message to the base station 200 (S330), and the base station 200 (communication processing The unit 241) may receive the XN SETUP REQUEST message from the relay node 100.
- the base station 200 (communication processing unit 241) may transmit the XN SETUP RESPONSE message to the relay node 100 (S340), and the relay node 100 (first communication processing unit 151) transmits the XN SETUP RESPONSE message to the base station 200 may be received.
- relay node 100 can initiate an inter-base station interface setup procedure (eg, Xn setup procedure).
- an inter-base station interface setup procedure eg, Xn setup procedure
- Protocol--Uu interface between relay node 100 and UE30 As shown in FIG. , PDCP (Packet Data Convergence Protocol), RLC (Radio Link Control), MAC (Medium Access Control), and Physical (PHY) layer protocols.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- PHY Physical
- the control plane protocol stack of the Uu interface between the relay node 100 and the UE 30 includes RRC (Radio Resource Control), PDCP, RLC, MAC, and PHY layer protocols.
- the user plane protocol stack of the Uu interface between relay node 100 and base station 200 includes SDAP, PDCP, RLC, Includes MAC and PHY layer protocols.
- the control plane protocol stack of the Uu interface between the relay node 100 and the base station 200 includes RRC, PDCP, RLC, MAC, and PHY layer protocols.
- the inter-base station interface includes an inter-base station user plane interface and an inter-base station control plane interface.
- the inter-base station interface is the Xn interface
- the Xn interface includes an Xn user plane (Xn-U) interface and an Xn control plane (Xn-C) interface.
- the protocol stack of the Xn-U interface between the relay node 100 and the base station 200 includes GTP-U (GTP Tunneling Protocol for User Plane), UDP (User Datagram Protocol), IP (Internet Protocol).
- GTP-U GTP Tunneling Protocol for User Plane
- UDP User Datagram Protocol
- IP Internet Protocol
- the protocol stack includes L1/L2 protocols under IP.
- the L1/L2 protocol is, for example, the Uu interface user plane protocol stack (see FIG. 12).
- the protocol stack of the Xn-C interface between the relay node 100 and the base station 200 includes XnAP (Xn Application Protocol), SCTP (Stream Control Transmission Protocol) and IP.
- XnAP Xn Application Protocol
- SCTP Stream Control Transmission Protocol
- IP IP
- the protocol stack includes L1/L2 protocols under IP.
- the L1/L2 protocol is, for example, the Uu interface user plane protocol stack (see FIG. 12).
- the above XnAP is defined in 3GPP TS 38.423 V16.4.0.
- the relay node 100 performs handover of the target UE between the base station 200 and the relay node 100 via the inter-base station interface (eg, Xn interface) perform handover procedures for
- the base station 200 also performs the handover procedure via the inter-base station interface (for example, the Xn interface).
- Handover from relay node 100 to base station 200 For example, handover of the target UE from relay node 100 to base station 200 is performed.
- the target UE is UE30, and handover of UE30 from relay node 100 to base station 200 is performed.
- the UE 30 transmits a measurement report (MeasurementReport) message to the relay node 100 via the Uu interface (S410).
- the relay node 100 determines handover of the UE 30 from the relay node 100 to the base station 200 based on the information included in the measurement report message (S420).
- the relay node 100 (first communication processing unit 151) transmits a handover request (HANDOVER REQUEST) message requesting the handover to the base station 200 via the inter-base station interface (eg, Xn interface) (S430).
- the base station 200 receives the handover request message from the relay node 100 via the inter-base station interface (for example, the Xn interface).
- the base station 200 performs admission control (S440) and sends a handover request acknowledgment (HANDOVER REQUEST ACKNOWLEDGE) message to the relay node 100 via the inter-base station interface (for example, the Xn interface). is transmitted (S450).
- the relay node 100 (first communication processing unit 151) receives the handover request confirmation message from the base station 200 via the inter-base station interface (for example, the Xn interface). After that, the relay node 100 (second communication processing unit 153), acting as a base station, transmits an RRC reconfiguration message to the UE 30 via the Uu interface (S460). The remainder of the handover procedure is then processed.
- Handover from the first base station to the second base station For example, handover of the target UE from the base station 200 to the relay node 100 is performed.
- the target UE is UE 40, and handover of UE 40 from base station 200 to relay node 100 is performed.
- the UE 40 transmits a measurement report message to the base station 200 via the Uu interface (S510).
- the base station 200 determines handover of the UE 40 from the base station 200 to the relay node 100 based on the information included in the measurement report message (S520).
- the base station 200 (communication processing unit 241) transmits a handover request (HANDOVER REQUEST) message requesting the handover to the relay node 100 via the inter-base station interface (eg, Xn interface) (S530).
- the relay node 100 (first communication processing unit 151) receives the handover request message from the base station 200 via the inter-base station interface (for example, the Xn interface).
- the relay node 100 (first communication processing unit 151) performs admission control (S540), and acknowledges the handover request (HANDOVER REQUEST ACKNOWLEDGE) to the base station 200 via the inter-base station interface (eg, Xn interface). Send the message (S550).
- the base station 200 (communication processing unit 241) receives the handover request confirmation message from the relay node 100 via the inter-base station interface (for example, the Xn interface). After that, the base station 200 (communication processing unit 241) transmits an RRC reconfiguration message to the UE 40 via the Uu interface (S560). The remainder of the handover procedure is then processed.
- the interface between base stations is the Xn interface.
- the inter-base station interface according to the embodiment of the present disclosure is not limited to this example.
- the inter-base station interface may be an interface with another name instead of the "Xn interface".
- the interface between base stations may be called a Z1 interface or a Zn interface.
- the protocol stack of the inter-base station interface may include the protocols shown in FIGS. 14 and 15, similar to the Xn interface.
- the inter-base station control plane interface may include a control protocol including procedures similar to XnAP instead of XnAP.
- the control protocol may include an inter-base station interface setup procedure and a handover procedure.
- the setup procedure may include transmission and reception of setup request messages and transmission and reception of setup response messages, similar to the examples of FIGS.
- the handover procedure may include transmission/reception of a handover request message and transmission/reception of a handover request confirmation message, similar to the examples of FIGS.
- the relay node 100 is a device that can be mounted on a mobile object. Furthermore, for example, the mobile object is a vehicle, and the relay node 100 is an in-vehicle device. However, the relay node 100 according to the embodiment of the present disclosure is not limited to this example.
- the relay node 100 may be a device other than an in-vehicle device.
- the relay node 100 may not be a device that can be mounted on a mobile object, but may be a communication module included in the device, or may be a mobile object (for example, a vehicle) itself that includes the device.
- the moving object may be another moving object instead of a vehicle.
- the mobile object may be a flying device.
- the system 1 is a 5G or NR TS-compliant system.
- the system 1 according to the embodiment of the present disclosure is not limited to this example.
- the system 1 may be a next-generation (eg, 6G) TS-compliant system.
- the Uu interface according to the third modification may mean the interface between the base station and the UE in the next generation
- the inter-base station interface according to the third modification is the next generation It may mean an interface between base stations.
- the inter-base-station interface setup procedure according to the third modification may mean the next-generation inter-base-station interface setup procedure.
- steps in the processes described in this specification do not necessarily have to be executed in chronological order according to the order described in the flowcharts or sequence diagrams.
- steps in a process may be performed in an order different from that depicted in a flowchart or sequence diagram, or in parallel.
- some of the steps in the process may be deleted and additional steps may be added to the process.
- a method may be provided that includes the operation of one or more components of the apparatus described herein, and a program may be provided for causing a computer to perform the operation of the components. Further, a computer-readable non-transitional tangible recording medium recording the program may be provided.
- a method may be provided that includes the operation of one or more components of the apparatus described herein, and a program may be provided for causing a computer to perform the operation of the components.
- a computer-readable non-transitional tangible recording medium recording the program may be provided.
- such methods, programs, and computer-readable non-transitory tangible computer-readable storage mediums are also included in the present disclosure.
- user equipment refers to a mobile station, mobile terminal, mobile device, mobile unit, subscriber station, subscriber terminal, subscriber equipment, subscriber unit, wireless It may also be called a station, a wireless terminal, a wireless device, a wireless unit, a remote station, a remote terminal, a remote device, a remote unit, or the like.
- transmit may mean performing at least one layer of processing within the protocol stack used for transmission, or physically transmitting a signal wirelessly or by wire. It may mean sending to Alternatively, “transmitting” may mean a combination of performing the at least one layer of processing and physically transmitting the signal wirelessly or by wire.
- recipient may mean processing at least one layer in the protocol stack used for reception, or physically receiving a signal wirelessly or by wire. may mean that Alternatively, “receiving” may mean a combination of performing the at least one layer of processing and physically receiving the signal wirelessly or by wire.
- the at least one layer may also be translated as at least one protocol.
- “obtain/acquire” may mean obtaining information among stored information, obtaining information among information received from other nodes. or to obtain the information by generating the information.
- the terms “include” and “comprise” do not mean to include only the recited items, but may include only the recited items, or may include only the recited items. It means that further items may be included in addition to the
- a relay node (100), a first communication processing unit (151) that communicates with a first base station (200) via a Uu interface as a user equipment; a second communication processing unit (153) communicating with one or more user equipments (30) via the Uu interface as a second base station; with The first communication processing unit communicates with the first base station as the second base station via an inter-base station interface, relay node.
- the inter-base station interface is an Xn interface;
- the first communication processing unit transmits an XN SETUP REQUEST message to the first base station and receives an XN SETUP RESPONSE message from the first base station.
- a relay node according to feature 2.
- the inter-base station interface is an Xn interface;
- the first communication processing unit receives an XN SETUP REQUEST message from the first base station and transmits an XN SETUP RESPONSE message to the first base station.
- a relay node according to feature 2.
- the first communication processing unit transmits a handover request message requesting handover of the target user equipment (30) from the relay node to the first base station to the first base station via an interface between base stations.
- a relay node according to any one of the characteristics 1-6, which transmits.
- the first communication processing unit transmits a handover request message requesting handover of the target user equipment (40) from the first base station to the relay node from the first base station via the inter-base station interface.
- a relay node according to any one of the preceding claims, receiving and transmitting a handover request confirmation message to said first base station via an inter-base station interface.
- (Feature 10) 10. The relay node according to any one of features 1 to 9, wherein the relay node is a mobile object, a mobile-mountable device, or a communication module included in a mobile-mountable device.
- the communication processing unit receives information indicating that the user equipment is a relay node from the relay node operating as the user equipment, and operates as the second base station in response to receiving the information. 14.
- the first base station of feature 13 performing said setup procedure with said relay node.
- the communication processing unit receives, from the relay node via the inter-base station interface, a handover request message requesting handover of the target user equipment (30) from the relay node to the first base station, and performs a handover request. 16.
- the first base station according to any one of the characteristics 12-15, sending an acknowledgment message to said relay node via an inter-base station interface.
- a method performed by a relay node (100) comprising: communicating as a user equipment with a first base station (200) over a Uu interface; communicating with one or more user equipment (30) over the Uu interface as a second base station; communicating with the first base station as the second base station via an inter-base station interface; method including.
- a method performed by a first base station (200) comprising: Communicating with said first base station as a user equipment via a Uu interface and with a relay node (100) communicating with one or more user equipments (30) via a Uu interface as a second base station.
- Communicating with the relay node includes: communicating with the relay node acting as the user equipment via a Uu interface; communicating with the relay node operating as the second base station via an inter-base station interface; method including.
- Feature 21 Communicate with a relay node (100) that communicates with a first base station (200) as user equipment via a Uu interface and with one or more user equipment (30) via a Uu interface as a second base station.
- Communicating with the relay node includes: communicating with the relay node acting as the user equipment via a Uu interface; communicating with the relay node operating as the second base station via an inter-base station interface; A program that contains .
- a computer-readable non-transitional tangible recording medium that records a program that causes a computer to execute Communicating with the relay node includes: communicating with the relay node acting as the user equipment via a Uu interface; communicating with the relay node operating as the second base station via an inter-base station interface; Computer-readable non-transitional tangible recording medium including
Abstract
Description
1.システムの構成
2.リレーノードの構成
3.基地局の構成
4.動作例
5.変形例
図1~図3を参照して、本開示の実施形態に係るシステム1の構成の例を説明する。
リレーノード100は、基地局とUEとの間でデータ及び制御情報のリレーを行う。
基地局200は、無線アクセスネットワーク(Radio Access Network:RAN)のノードであり、基地局200のカバレッジエリア内に位置するUEとUuインターフェースを介して通信する。
図3を参照すると、システム1を含む全体のアーキテクチャの例が示されている。この例では、リレーノード100は、MBSRノードであり、基地局200は、MBSRドナーgNBである。MBSRノード(リレーノード100)は、UE機能とgNB機能とを有する。MBSRノード(リレーノード100)とMBSRドナーgNB(基地局200)との間には、Uuインターフェースがある。MBSRノード(リレーノード100)とUE30との間にも、Uuインターフェースがある。なお、MBSRドナーgNB(基地局200)とgNB50との間には、Xnインターフェースがあり、MBSRドナーgNB(基地局200)と5GC(5G Core)60との間には、NGインターフェースがある。
図4及び図5を参照して、本開示の実施形態に係るリレーノード100の構成の例を説明する。
まず、図4を参照して、本開示の実施形態に係るリレーノード100の機能構成の例を説明する。図4を参照すると、リレーノード100は、第1無線通信部110、第2無線通信部120、ネットワーク通信部130、記憶部140及び処理部150を備える。
次に、図5を参照して、本開示の実施形態に係るリレーノード100のハードウェア構成の例を説明する。図5を参照すると、リレーノード100は、アンテナ181、RF(Radio Frequency)回路183、アンテナ185、RF回路187、プロセッサ189、ネットワークインターフェース191及びメモリ193及びストレージ195を備える。
図6及び図7を参照して、本開示の実施形態に係る基地局200の構成の例を説明する。
まず、図6を参照して、本開示の実施形態に係る基地局200の機能構成の例を説明する。図6を参照すると、基地局200は、無線通信部210、ネットワーク通信部220、記憶部230及び処理部240を備える。
次に、図7を参照して、本開示の実施形態に係る基地局200のハードウェア構成の例を説明する。図7を参照すると、基地局200は、アンテナ281、RF回路283、ネットワークインターフェース285、プロセッサ287、メモリ289及びストレージ291を備える。
図8~図19を参照して、本開示の実施形態に係るリレーノード100及び基地局200の動作の例を説明する。
例えば、リレーノード100(第1通信処理部151)は、基地局として、基地局200と基地局間インターフェースのセットアップ手続きを行う。換言すると、基地局200(通信処理部241)は、基地局として動作するリレーノード100と、基地局間インターフェースのセットアップ手続きを行う。例えば、当該セットアップ手続きは、Xnセットアップ手続きである。
第1の例として、リレーノード100(第1通信処理部151)は、UEとして、当該UEがリレーノードであることを示す情報(以下、「リレー指示情報」と呼ぶ)を基地局200へ送信し、基地局200(通信処理部241)は、UEとして動作するリレーノード100から当該リレー指示情報を受信する。上記リレー指示情報は、上記UEがMBSRであることを示してもよく、又は、上記UEが車両搭載リレーであることを示してもよい。リレーノード100(第1通信処理部151)は、基地局200への接続を確立するための手続きの中で、又は、当該手続きの後に、上記リレー指示情報を基地局200へ送信してもよい。あるいは、リレーノード100(第1通信処理部151)は、最初のユーザデータの発生に応じて、上記リレー指示情報を基地局200へ送信してもよい。
第2の例として、リレーノード100(第1通信処理部151)は、上記リレー指示情報を送信することなく、上記セットアップ手続き(例えば、Xnセットアップ手続き)を自ら開始してもよい。
-リレーノード100とUE30との間のUuインターフェース
図10に示されるように、例えば、リレーノード100とUE30との間のUuインターフェースのユーザプレーンプロトコルスタックは、SDAP(Service Data Adaptation Protocol)、PDCP(Packet Data Convergence Protocol)、RLC(Radio Link Control)、MAC(Medium Access Control)、及び、物理(Physical:PHY)レイヤのプロトコルを含む。
図12に示されるように、例えば、リレーノード100と基地局200との間のUuインターフェースのユーザプレーンプロトコルスタックは、SDAP、PDCP、RLC、MAC、及び、PHYレイヤのプロトコルを含む。
例えば、上記基地局間インターフェースは、基地局間ユーザプレーンインターフェースと、基地局間制御プレーンインターフェースを含む。上述したように、例えば、上記基地局間インターフェースは、Xnインターフェースであり、Xnインターフェースは、Xnユーザプレーン(Xn-U)インターフェースと、Xn制御プレーン(Xn-C)インターフェースとを含む。
例えば、リレーノード100(第1通信処理部151)は、上記基地局間インターフェース(例えば、Xnインターフェース)を介して、基地局200とリレーノード100との間での対象UEのハンドオーバのためのハンドオーバ手続きを行う。基地局200(通信処理部241)も、上記基地局間インターフェース(例えば、Xnインターフェース)を介して、上記ハンドオーバ手続きを行う。
例えば、リレーノード100から基地局200への対象UEのハンドオーバが行われる。図16の例を参照すると、例えば、当該対象UEは、UE30であり、リレーノード100から基地局200へのUE30のハンドオーバが行われる。
例えば、基地局200からリレーノード100への対象UEのハンドオーバが行われる。図18の例を参照すると、例えば、当該対象UEは、UE40であり、基地局200からリレーノード100へのUE40のハンドオーバが行われる。
本開示の実施形態に係る第1~第3の変形例を説明する。なお、第1~第3の変形例のうちの2つ以上が組み合わせられてもよい。
本開示の実施形態の上述した例では、上記基地局間インターフェースは、Xnインターフェースである。しかし、本開示の実施形態に係る基地局間インターフェースは、この例に限定されない。
本開示の実施形態の上述した例では、リレーノード100は、移動体に搭載可能な装置である。さらに、例えば、当該移動体は、車両であり、リレーノード100は、車載装置である。しかし、本開示の実施形態に係るリレーノード100は、この例に限定されない。
本開示の実施形態の上述した例では、システム1は、5G又はNRのTSに準拠したシステムである。しかし、本開示の実施形態に係るシステム1は、この例に限定されない。
リレーノード(100)であって、
ユーザ機器としてUuインターフェースを介して第1の基地局(200)と通信する第1通信処理部(151)と、
第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信する第2通信処理部(153)と、
を備え、
前記第1通信処理部は、前記第2の基地局として基地局間インターフェースを介して前記第1の基地局と通信する、
リレーノード。
前記第1通信処理部は、前記第2の基地局として前記第1の基地局と前記基地局間インターフェースのセットアップ手続きを行う、特徴1に記載のリレーノード。
前記基地局間インターフェースは、Xnインターフェースであり、
前記第1通信処理部は、XN SETUP REQUESTメッセージを前記第1の基地局へ送信し、XN SETUP RESPONSEメッセージを前記第1の基地局から受信する、
特徴2に記載のリレーノード。
前記基地局間インターフェースは、Xnインターフェースであり、
前記第1通信処理部は、XN SETUP REQUESTメッセージを前記第1の基地局から受信し、XN SETUP RESPONSEメッセージを前記第1の基地局へ送信する、
特徴2に記載のリレーノード。
前記第1通信処理部は、前記ユーザ機器として、前記ユーザ機器がリレーノードであることを示す情報を前記第1の基地局へ送信する、特徴1~4のいずれか1項に記載のリレーノード。
前記第1通信処理部は、前記基地局間インターフェースを介して、前記第1の基地局と前記リレーノードとの間での対象ユーザ機器のハンドオーバのためのハンドオーバ手続きを行う、特徴1~5のいずれか1項に記載のリレーノード。
前記第1通信処理部は、前記リレーノードから前記第1の基地局への対象ユーザ機器(30)のハンドオーバを要求するハンドオーバ要求メッセージを、基地局間インターフェースを介して前記第1の基地局へ送信する、特徴1~6のいずれか1項に記載のリレーノード。
前記第2通信処理部は、前記第2の基地局として前記ハンドオーバを決定する、特徴7に記載のリレーノード。
前記第1通信処理部は、前記第1の基地局から前記リレーノードへの対象ユーザ機器(40)のハンドオーバを要求するハンドオーバ要求メッセージを、基地局間インターフェースを介して前記第1の基地局から受信し、ハンドオーバ要求確認メッセージを、基地局間インターフェースを介して前記第1の基地局へ送信する、特徴1~8のいずれか1項に記載のリレーノード。
前記リレーノードは、移動体、移動体に搭載可能な装置、又は、移動体に搭載可能な装置に含まれる通信モジュールである、特徴1~9のいずれか1項に記載のリレーノード。
前記移動体は、車両である、特徴10に記載のリレーノード。
第1の基地局(200)であって、
ユーザ機器としてUuインターフェースを介して前記第1の基地局と通信し、第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信するリレーノード(100)と通信する通信処理部(241)、
を備え、
前記通信処理部は、Uuインターフェースを介して、前記ユーザ機器として動作する前記リレーノードと通信し、基地局間インターフェースを介して、前記第2の基地局として動作する前記リレーノードと通信する、
第1の基地局。
前記通信処理部は、前記第2の基地局として動作する前記リレーノードと前記基地局間インターフェースのセットアップ手続きを行う、特徴12に記載の第1の基地局。
前記通信処理部は、前記ユーザ機器がリレーノードであることを示す情報を、前記ユーザ機器として動作する前記リレーノードから受信し、当該情報の受信に応じて、前記第2の基地局として動作する前記リレーノードと前記セットアップ手続きを行う、特徴13に記載の第1の基地局。
前記通信処理部は、前記基地局間インターフェースを介して、前記第1の基地局と前記リレーノードとの間での対象ユーザ機器のハンドオーバのためのハンドオーバ手続きを行う、特徴12~14のいずれか1項に記載の第1の基地局。
前記通信処理部は、前記リレーノードから前記第1の基地局への対象ユーザ機器(30)のハンドオーバを要求するハンドオーバ要求メッセージを、基地局間インターフェースを介して前記リレーノードから受信し、ハンドオーバ要求確認メッセージを、基地局間インターフェースを介して前記リレーノードへ送信する、特徴12~15のいずれか1項に記載の第1の基地局。
前記通信処理部は、前記第1の基地局から前記リレーノードへの対象ユーザ機器(40)のハンドオーバを要求するハンドオーバ要求メッセージを、基地局間インターフェースを介して前記リレーノードへ送信する、特徴12~16のいずれか1項に記載の第1の基地局。
リレーノード(100)により行われる方法あって、
ユーザ機器としてUuインターフェースを介して第1の基地局(200)と通信することと、
第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信することと、
前記第2の基地局として基地局間インターフェースを介して前記第1の基地局と通信することと、
を含む方法。
第1の基地局(200)により行われる方法あって、
ユーザ機器としてUuインターフェースを介して前記第1の基地局と通信し、第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信するリレーノード(100)と通信すること、
を含み、
前記リレーノードと通信することは、
Uuインターフェースを介して、前記ユーザ機器として動作する前記リレーノードと通信することと、
基地局間インターフェースを介して、前記第2の基地局として動作する前記リレーノードと通信することと、
を含む
方法。
ユーザ機器としてUuインターフェースを介して第1の基地局(200)と通信することと、
第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信することと、
前記第2の基地局として基地局間インターフェースを介して前記第1の基地局と通信することと、
をコンピュータに実行させるプログラム。
ユーザ機器としてUuインターフェースを介して第1の基地局(200)と通信し、第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信するリレーノード(100)と通信すること、
をコンピュータに実行させるプログラムであり、
前記リレーノードと通信することは、
Uuインターフェースを介して、前記ユーザ機器として動作する前記リレーノードと通信することと、
基地局間インターフェースを介して、前記第2の基地局として動作する前記リレーノードと通信することと、
を含む
プログラム。
ユーザ機器としてUuインターフェースを介して第1の基地局(200)と通信することと、
第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信することと、
前記第2の基地局として基地局間インターフェースを介して前記第1の基地局と通信することと、
をコンピュータに実行させるプログラムを記録したコンピュータに読み取り可能な非遷移的実体的記録媒体。
ユーザ機器としてUuインターフェースを介して第1の基地局(200)と通信し、第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信するリレーノード(100)と通信すること、
をコンピュータに実行させるプログラムを記録したコンピュータに読み取り可能な非遷移的実体的記録媒体であり、
前記リレーノードと通信することは、
Uuインターフェースを介して、前記ユーザ機器として動作する前記リレーノードと通信することと、
基地局間インターフェースを介して、前記第2の基地局として動作する前記リレーノードと通信することと、
を含む
コンピュータに読み取り可能な非遷移的実体的記録媒体。
Claims (15)
- リレーノード(100)であって、
ユーザ機器としてUuインターフェースを介して第1の基地局(200)と通信する第1通信処理部(151)と、
第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信する第2通信処理部(153)と、
を備え、
前記第1通信処理部は、前記第2の基地局として基地局間インターフェースを介して前記第1の基地局と通信する、
リレーノード。 - 前記第1通信処理部は、前記第2の基地局として前記第1の基地局と前記基地局間インターフェースのセットアップ手続きを行う、請求項1に記載のリレーノード。
- 前記基地局間インターフェースは、Xnインターフェースであり、
前記第1通信処理部は、XN SETUP REQUESTメッセージを前記第1の基地局へ送信し、XN SETUP RESPONSEメッセージを前記第1の基地局から受信する、
請求項2に記載のリレーノード。 - 前記基地局間インターフェースは、Xnインターフェースであり、
前記第1通信処理部は、XN SETUP REQUESTメッセージを前記第1の基地局から受信し、XN SETUP RESPONSEメッセージを前記第1の基地局へ送信する、
請求項2に記載のリレーノード。 - 前記第1通信処理部は、前記ユーザ機器として、前記ユーザ機器がリレーノードであることを示す情報を前記第1の基地局へ送信する、請求項1~4のいずれか1項に記載のリレーノード。
- 前記第1通信処理部は、前記基地局間インターフェースを介して、前記第1の基地局と前記リレーノードとの間での対象ユーザ機器のハンドオーバのためのハンドオーバ手続きを行う、請求項1~5のいずれか1項に記載のリレーノード。
- 前記第1通信処理部は、前記リレーノードから前記第1の基地局への対象ユーザ機器(30)のハンドオーバを要求するハンドオーバ要求メッセージを、基地局間インターフェースを介して前記第1の基地局へ送信する、請求項1~6のいずれか1項に記載のリレーノード。
- 前記第2通信処理部は、前記第2の基地局として前記ハンドオーバを決定する、請求項7に記載のリレーノード。
- 前記第1通信処理部は、前記第1の基地局から前記リレーノードへの対象ユーザ機器(40)のハンドオーバを要求するハンドオーバ要求メッセージを、基地局間インターフェースを介して前記第1の基地局から受信し、ハンドオーバ要求確認メッセージを、基地局間インターフェースを介して前記第1の基地局へ送信する、請求項1~8のいずれか1項に記載のリレーノード。
- 前記リレーノードは、移動体、移動体に搭載可能な装置、又は、移動体に搭載可能な装置に含まれる通信モジュールである、請求項1~9のいずれか1項に記載のリレーノード。
- 前記移動体は、車両である、請求項10に記載のリレーノード。
- 第1の基地局(200)であって、
ユーザ機器としてUuインターフェースを介して前記第1の基地局と通信し、第2の基地局としてUuインターフェースを介して1つ以上のユーザ機器(30)と通信するリレーノード(100)と通信する通信処理部(241)、
を備え、
前記通信処理部は、Uuインターフェースを介して、前記ユーザ機器として動作する前記リレーノードと通信し、基地局間インターフェースを介して、前記第2の基地局として動作する前記リレーノードと通信する、
第1の基地局。 - 前記通信処理部は、前記第2の基地局として動作する前記リレーノードと前記基地局間インターフェースのセットアップ手続きを行う、請求項12に記載の第1の基地局。
- 前記通信処理部は、前記ユーザ機器がリレーノードであることを示す情報を、前記ユーザ機器として動作する前記リレーノードから受信し、当該情報の受信に応じて、前記第2の基地局として動作する前記リレーノードと前記セットアップ手続きを行う、請求項13に記載の第1の基地局。
- 前記通信処理部は、前記基地局間インターフェースを介して、前記第1の基地局と前記リレーノードとの間での対象ユーザ機器のハンドオーバのためのハンドオーバ手続きを行う、請求項12~14のいずれか1項に記載の第1の基地局。
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WO2018173461A1 (ja) * | 2017-03-23 | 2018-09-27 | 日本電気株式会社 | 基地局、無線中継局、通信方法、及びプログラムが格納された非一時的なコンピュータ可読媒体 |
WO2020202340A1 (ja) * | 2019-03-29 | 2020-10-08 | 本田技研工業株式会社 | 中継装置、プログラム、通信システム、及び管理方法 |
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WO2018173461A1 (ja) * | 2017-03-23 | 2018-09-27 | 日本電気株式会社 | 基地局、無線中継局、通信方法、及びプログラムが格納された非一時的なコンピュータ可読媒体 |
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