WO2022153855A1 - 無線通信装置、基地局、通信システム及び通信方法 - Google Patents
無線通信装置、基地局、通信システム及び通信方法 Download PDFInfo
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
- H04W84/20—Master-slave selection or change arrangements
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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
- H04W36/037—Reselecting a link using a direct mode connection by reducing handover delay, e.g. latency
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- H—ELECTRICITY
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Definitions
- This disclosure relates to wireless communication devices, base stations, communication systems and communication methods.
- D2D (Device-to-Device) communication which directly communicates between terminals (UEs), is standardized as sidelink communication in 4G LTE (Long Term Evolution) and 5G NR (New Radio), respectively.
- V2X (Vehicle-to-Everything) communication is one of the main use cases.
- V2V (Vehicle-to-Vehicle) V2I (Vehicle-to-Infrastructure), V2P (Vehicle-to-Pedestrian), and V2N (Vehicle-to-Network) are assumed.
- sidelink communication is not limited to V2X communication, and can be used in various use cases.
- Automation factory is one of the use cases where side-link communication can be utilized. In such factories, a large number of devices such as sensors and cameras are installed and it is considered to communicate directly with each other.
- Intra-vehicle communication for example, sensors and camera modules that have been connected to each other by wire can be connected to each other by wireless communication as wireless communication devices.
- wireless communication devices For example, it is expected that the number of devices such as sensors and camera modules will increase rapidly in the future as the realization of autonomous driving progresses. Therefore, it is considered that the demand for connecting such sensors and camera modules to each other by wireless communication will increase.
- this disclosure provides a mechanism that can realize lower latency and more reliable side link communication.
- a wireless communication device performs sidelink communication by a plurality of wireless communication devices.
- the wireless communication device includes a control unit.
- the control unit acquires decision information for determining a plurality of master devices that communicate with the base station in the side link communication.
- the control unit determines whether or not the own device is one of the plurality of master devices based on the determination information.
- Each of one or more embodiments (including examples and modifications) described below can be implemented independently. On the other hand, at least a part of the plurality of embodiments described below may be implemented in combination with at least a part of other embodiments as appropriate. These plurality of embodiments may include novel features that differ from each other. Therefore, these plurality of embodiments can contribute to solving different purposes or problems, and can exert different effects.
- the sidelink communication in the present specification and the drawings is basically based on the LTE V2X and NR V2X wireless access methods. Note that LTE V2X and NR V2X are described in 3GPP TR37.985.
- FIG. 1 is a diagram for explaining an example of a communication system 1a that performs side-link communication.
- the communication system 1a shown in FIG. 1 includes a base station 100a and a plurality of terminal devices 200a.
- the plurality of terminal devices 200a are, for example, smartphones, sensors, camera devices, etc., and are divided into groups that perform side-link communication with each other in a predetermined area.
- a plurality of terminal devices 200a are divided into three groups 12a to 12c.
- a plurality of terminal devices 200a included in the same group share data by performing side link communication with each other. For example, in Intra-vehicle communication, grouping is performed so that a plurality of terminal devices 200a (for example, sensors and the like) mounted on the same vehicle are included in one group.
- one of a plurality of terminal devices 200a belonging to one group is set as a representative device (hereinafter, also referred to as a master UE 200m).
- the plurality of terminal devices 200a communicate with each other via the master UE 200m. That is, the master UE 200m communicates with the base station 100a on behalf of the group.
- Such communication may be side link communication, downlink communication, or uplink communication.
- the master UE 200m is supposed to communicate with the base station 100a on behalf of the group, but the present invention is not limited to this.
- the master UE 200m may be a control terminal that controls within a predetermined area.
- the control terminal is also included.
- the communication method within the group by the master UE 200m and the selection method of the master UE 200m are disclosed in, for example, International Publication No. 2014/110999 and International Publication No. 2014/11112.
- the master UE 200m communicates with the base station 100a on behalf of the group. If the communication environment between the master UE 200m and the base station 100a deteriorates, the master UE 200m may be reselected or the network in the group may be reconstructed. Therefore, a communication delay occurs before the communication between the master UE 200m and the base station 100a is resumed.
- Such a delay has a great influence on use cases where low delay and high reliability (URLLC) are especially important, and may affect the communication of the entire network in the group.
- URLLC low delay and high reliability
- a method of suppressing such a delay a method in which all the terminal devices 200a in the group communicate with the base station 100a can be considered. However, in this method, since many terminal devices 200a communicate with the base station 100a, the frequency utilization efficiency is lowered. Further, when the terminal device 200a and the base station device 100a perform side link communication, the radio resource is congested and the collision probability of the transmitted data is increased, which may cause a data transmission delay.
- the time for continuing the communication with the base station is omitted. It is possible to realize low delay.
- FIG. 2 is a diagram showing an example of a schematic configuration of the communication system 1 according to the embodiment of the present disclosure.
- the system 1 includes a base station 100, a terminal device 200, a core network (Core Network) 20, and a PDN (Packet Data Network) 30.
- Core Network Core Network
- PDN Packet Data Network
- the communication system 1 may be a cellular communication system such as W-CDMA (Wideband Code Division Multiple Access), cdma2000 (Code Division Multiple Access 2000), LTE, NR, or the like.
- LTE shall include LTE-A (LTE-Advanced), LTE-A Pro (LTE-Advanced Pro), and EUTRA (Evolved Universal Terrestrial Radio Access).
- NR shall include NLAT (New Radio Access Technology) and FEUTRA (Further EUTRA).
- NR is the next generation (fifth generation) wireless access technology (RAT) of LTE.
- RAT wireless access technology
- LTE Long Term Evolution
- NR is a wireless access technology that can support various use cases including eMBB (Enhanced Mobile Broadband), mMTC (Massive Machine Type Communications) and URLLC (Ultra-Reliable and Low Latency Communications).
- eMBB Enhanced Mobile Broadband
- mMTC Massive Machine Type Communications
- URLLC Ultra-Reliable and Low Latency Communications
- the communication system 1 is not limited to the cellular communication system.
- the communication system 2 may be another wireless communication system such as a wireless LAN (Local Area Network) system, a television broadcasting system, an aeronautical wireless system, or a space wireless communication system.
- the base station 100 is a communication device that operates the cell 11 and provides a wireless service to one or more terminal devices 200 located inside the coverage of the cell 11.
- Cell 11 can be operated according to any wireless communication method such as LTE or NR.
- the base station 100 is connected to the core network 20.
- the core network 20 is connected to the PDN 30.
- the base station 100 may be composed of a set of a plurality of physical or logical devices.
- the base station 100 is classified into a plurality of devices of BBU (Baseband Unit) and RU (Radio Unit), and may be interpreted as an aggregate of these plurality of devices.
- base station 100 may be either or both of BBU and RU.
- the BBU and RU may be connected by a predetermined interface (for example, eCPRI).
- the RU may be referred to as a Remote Radio Unit (RRU) or Radio DoT (RD).
- RRU Remote Radio Unit
- RD Radio DoT
- the RU may support gNB-DU, which will be described later.
- the BBU may be compatible with gNB-CU, which will be described later.
- the RU may be a device integrally formed with the antenna.
- the antenna of the base station (for example, the antenna formed integrally with the RU) may adopt the Advanced Antenna System and support MIMO (for example, FD-MIMO) or beamforming.
- the antenna of the base station 100 (for example, an antenna integrally formed with the RU) may include, for example, 64 transmitting antenna ports and 64 receiving antenna ports.
- a plurality of base stations 100 may be connected to each other.
- One or more base stations 100 may be included in a radio access network (Radio Access Network: RAN). That is, the base station 100 may be simply referred to as a RAN, a RAN node, an AN (Access Network), or an AN node.
- RAN in LTE is called EUTRAN (Enhanced Universal Terrestrial RAN).
- RAN in NR is called NGRAN.
- RAN in W-CDMA (UMTS) is called UTRAN.
- the LTE base station 100 is referred to as eNodeB (Evolved Node B) or eNB. That is, EUTRAN includes one or more eNodeBs (eNBs).
- the NR base station 100 is referred to as gNodeB or gNB. That is, NGRAN contains one or more gNBs.
- EUTRAN may include gNB (en-gNB) connected to the core network (EPC) in LTE communication systems (EPS).
- EPS LTE communication systems
- NGRAN may include an ng-eNB connected to the core network 5GC in a 5G communication system (5GS).
- 3GPP Access when the base station 100 is eNB, gNB, or the like, it may be referred to as 3GPP Access.
- the base station 100 is a wireless access point (Access Point), it may be referred to as Non-3GPP Access.
- the base station 100 may be an optical overhanging device called RRH (Remote Radio Head).
- RRH Remote Radio Head
- the base station 100 may be referred to as a combination of the above-mentioned gNB CU (Central Unit) and gNB DU (Distributed Unit), or any one of them.
- the gNB CU (Central Unit) hosts multiple upper layers (for example, RRC, SDAP, PDCP) of the Access Stratum for communication with the UE.
- gNB-DU hosts a plurality of lower layers (for example, RLC, MAC, PHY) in Access Stratum.
- RRC signaling for example, various SIBs including MIB and SIB1, RRCSetup message, RRCReconfiguration message
- gNB CU DCI and various Physical Channels (for example, described later) are generated.
- PDCCH Physical Downlink Control Channel
- PBCH Physical Downlink Control Channel
- gNB-DU may be generated.
- some configurations such as IE: cellGroupConfig may be generated by gNB-DU, and the remaining configurations may be generated by gNB-CU. These configurations may be transmitted and received by the F1 interface described later.
- the base station 100 may be configured to be able to communicate with another base station 100.
- the base stations 100 may be connected by an X2 interface.
- the devices may be connected by an Xn interface.
- the devices may be connected by the F1 interface described above.
- the messages / information RRC signaling or DCI information, Physical Channel described later may be communicated between a plurality of base stations (for example, via the X2, Xn, and F1 interfaces).
- the base station 100 may be configured to manage a plurality of cells.
- the cell provided by the base station 100 is called a Serving cell.
- Serving cells include PCell (Primary Cell) and SCell (Secondary Cell).
- Dual Connectivity for example, EUTRA-EUTRA Dual Connectivity, EUTRA-NR Dual Connectivity (ENDC), EUTRA-NR Dual Connectivity with 5GC, NR-EUTRA Dual Connectivity (NEDC), NR-NR Dual Connectivity
- UE for example, terminal device
- PCell and zero or more SCell (s) provided by MN (Master Node) are called Master Cell Group.
- the Serving cell may include a PS Cell (Primary Secondary Cell or Primary SCG Cell).
- the PS Cell provided by the SN (Secondary Node) and the zero or more SCell (s) are called the Secondary Cell Group (SCG).
- SCG Secondary Cell Group
- PUCCH physical uplink control channel
- SCell Radio Link Failure is also detected by PCell and PSCell, but not by SCell (it is not necessary to detect it). Since PCell and PSCell have a special role in Serving Cell (s) in this way, they are also called Special Cell (SpCell).
- One Downlink Component Carrier and one Uplink Component Carrier may be associated with one cell.
- the system bandwidth corresponding to one cell may be divided into a plurality of bandwidth parts (Bandwidth Part).
- Bandwidth Parts may be set in the UE, and one Bandwidth Part may be used in the UE as an Active BWP.
- the radio resources for example, frequency band, numerology (subcarrier spacing), slot format (Slot configuration)
- the terminal device 200 may differ for each cell, each component carrier, or each BWP.
- the core network 120 is an NR core network (5G Core (5GC)
- the core network 120 is AMF (Access and Mobility Management Function), SMF (Session Management Function), UPF (User Plane Function), PCF (Policy Control). Function) and UDM (Unified Data Management) can be included.
- AMF Access and Mobility Management Function
- SMF Session Management Function
- UPF User Plane Function
- PCF Policy Control
- Function Policy Control
- UDM Unified Data Management
- the core network 120 is an LTE core network (Evolved Packet Core (EPC))
- the core network 120 is MME (Mobility Management Entity), S-GW (Serving gateway), P-GW (PDN gateway), PCRF (Policy). and Charging Rule Function) and HSS (Home Subscriber Server) may be included.
- the AMF and MME are control nodes that handle signals on the control plane, and manage the mobility of the terminal device 40.
- UPF and S-GW / P-GW are nodes that handle user plane signals.
- the PCF / PCRF is a control node that controls policies such as QoS (Quality of Service) and billing for PDU sessions or bearers.
- the UDM / HSS is a control node that handles subscriber data and controls services.
- the terminal device 200 is a wireless communication device that wirelessly communicates with other devices.
- the terminal device 110 is, for example, a sensor or camera device having a communication function, a mobile phone, a smart device (smartphone or tablet), a PDA (Personal Digital Assistant), or a personal computer.
- the terminal device 110 may be a head-mounted display (Head Mounted Display), VR goggles, or the like having a function of transmitting and receiving data via wireless.
- the terminal device 200 wirelessly communicates with another terminal device 200 based on the control by the base station 100 or autonomously.
- the terminal device 200 transmits the side link signal to the other terminal device 200 at the PC5 link, and receives the side link signal from the other terminal device 200.
- the transmission and reception of the side link signal by the terminal device 200 will be collectively referred to as side link communication.
- the terminal device 200 may be able to use an automatic retransmission technique such as HARQ (Hybrid Automatic Repeat reQuest) when performing side link communication.
- HARQ Hybrid Automatic Repeat reQuest
- a plurality of terminal devices 200 are classified into at least one group, and side link communication is performed within the group.
- a plurality of terminal devices 200 are divided into three groups 12A to 12C, and side link communication is performed within each group 12.
- a plurality of terminal devices 200 wirelessly communicate with the base station 100 based on the control by the base station 100.
- the terminal device 200 that wirelessly communicates with the base station 100 on behalf of the group is referred to as a representative terminal device or a master UE 200M.
- a plurality of master UEs 200M are included in the group 12.
- the plurality of master UEs 200M perform duplication communication or multiplier communication with the base station 100.
- FIG. 2 shows a case where two master UEs 200M exist in each of the groups 12A to 12C, but the number of master UEs 200M is not limited to two and may be three or more.
- the plurality of master UEs 200M may be determined autonomously by a plurality of terminal devices 200 in the group 12, or may be determined by devices outside the group 12 such as the base station 100. The method of determining the plurality of master UEs 200M will be described later.
- the terminal device 200 which is the master UE 200M, may be capable of NOMA (Non Orthogonal Multiple Access) communication with the base station device 130.
- the terminal device 200 may also be capable of NOMA communication in communication (side link) with another terminal device 200.
- the terminal device 200 may be capable of LPWA (Low Power Wide Area) communication with another communication device (for example, the base station 100 and the other terminal device 200).
- the wireless communication used by the terminal device 200 may be wireless communication using millimeter waves or terahertz waves.
- the wireless communication (including side link communication) used by the terminal device 200 may be wireless communication using radio waves or wireless communication (optical radio) using infrared rays or visible light. ..
- all of the plurality of master UEs 200M have a function representing the group 12 and communicate with the base station 100, but the present invention is not limited to this.
- a plurality of master UEs 200M may be provided with priorities (orders) for communicating with the base station 100.
- some master UEs 200M may communicate with the base station 100 according to the priority.
- FIG. 3 is a diagram showing another example of the schematic configuration of the communication system 1 according to the embodiment of the present disclosure.
- the plurality of master UEs 200M are the primary master UE 200MP (Primary master UE, hereinafter also referred to as pmUE200MP) having the highest priority and the secondary master UE200MS (Secondary master UE, hereinafter also referred to as smUE200MS) having the lowest priority. Describe) and include.
- the pmUE200MP (an example of the first master device) communicates with the base station 100 on behalf of a plurality of master UEs 200M.
- the smUE200MS (an example of a second master device) communicates with the base station 100 instead of the pmUE200MP, for example, when the communication between the pmUE200MP and the base station 100 is interrupted according to the communication state between the pmUE200MP and the base station 100. conduct.
- the smUE 200MS performs side link communication in the same manner as the other terminal devices 200 belonging to the group 12.
- the terminal device 200 belonging to the group 12 performs side link communication with both the pmUE200MP and the smUE200MS.
- the master UE 200M in which the terminal device 200 performs side link communication may be the smUE200MS. Such a case will be described with reference to FIG.
- FIG. 4 is a diagram showing another example of the schematic configuration of the communication system 1 according to the embodiment of the present disclosure.
- the group 13C will be described, but the same applies to the other groups 12.
- the pmUE 200MP communicates with the base station 100. Further, the pmUE200MP performs side link communication with the smUE200MS and does not communicate with other terminal devices 200. The smUE200MS performs side-link communication with the pmUE200MP and another terminal device 200.
- the processing load of the pmUE200MP and the smUE200MS can be reduced by forming the devices connecting the base station 100, the pmUE200MP, the smUE200MS, and the other terminal device 200 in this order in a hierarchical structure.
- FIGS. 3 and 4 show a case where one pmUE200MP and one smUE200MS are set for each of the groups 12A to 12C, but the number of smUE200MS is not limited to this. For example, two or more smUE200MS may be set.
- priority may be set for two or more smUE200MS.
- the terminal device 200 to be connected may be separated for each of the plurality of smUE 200MS. That is, a subgroup may be formed for each of the plurality of smUE200MS, and each smUE200MS may perform side link communication with the terminal device 200 included in the corresponding subgroup.
- pmUE200MP and smUE200MS Details of the functions and determination methods of pmUE200MP and smUE200MS will be described later.
- all of the plurality of master UEs 200M shall perform duplication communication or multiplier communication with the base station 100.
- FIG. 5 is a block diagram showing an example of the configuration of the base station 100 according to the embodiment of the present disclosure.
- the base station 100 includes an antenna unit 110, a wireless communication unit 120, a network communication unit 130, a storage unit 140, and a control unit 150.
- Antenna unit 110 The antenna unit 110 radiates the signal output by the wireless communication unit 120 into space as a radio wave. Further, the antenna unit 110 converts a radio wave in space into a signal and outputs the signal to the wireless communication unit 120.
- the antenna unit 110 of the present embodiment has a plurality of antenna elements and can form a beam.
- the wireless communication unit 120 transmits and receives signals.
- the wireless communication unit 120 transmits a downlink signal to the terminal device 200 and receives an uplink signal from the terminal device 200.
- the wireless communication unit 120 of the present embodiment can form a plurality of beams by the antenna unit 110 and communicate with the terminal device 200.
- the network communication unit 130 transmits / receives information.
- the network communication unit 130 transmits information to another node and receives information from the other node.
- the other node includes another base station 100 and a core network node.
- Storage unit 140 The storage unit 140 temporarily or permanently stores the program and various data for the operation of the base station 100.
- Control unit 150 controls the operation of the entire base station 100 to provide various functions of the base station 100.
- the control unit 150 includes a determination unit 151 and a notification unit 152.
- the determination unit 151 determines a plurality of master UEs 200Ms based on the information acquired from the terminal device 200.
- the information acquired by the determination unit 151 from the terminal device 200 is determination information for determining a plurality of master UEs 200M. Details of such decision information will be described later.
- the determination unit 151 determines the information to be transmitted to the terminal device 200.
- Such information is decision information used for determining a plurality of master UEs 200M by the terminal device 200. Details of the decision information will be described later.
- the notification unit 152 notifies the terminal device 200 of the determination result of the determination unit 151. For example, when the base station 100 determines a plurality of master UEs 200M, the notification unit 152 notifies the plurality of master UEs 200M determined by the determination unit 151 that the master UE 200M has been determined.
- the notification unit 152 notifies the terminal device 200 of the decision information determined by the determination unit 151.
- the control unit 150 may further include other components other than these components. That is, the control unit 150 can perform operations other than the operations of these components.
- FIG. 6 is a block diagram showing an example of the configuration of the terminal device 200 according to the embodiment of the present disclosure.
- the terminal device 200 includes an antenna unit 210, a wireless communication unit 220, a storage unit 230, and a control unit 240.
- Antenna unit 210 The antenna unit 210 radiates the signal output by the wireless communication unit 220 into space as a radio wave. Further, the antenna unit 210 converts a radio wave in space into a signal and outputs the signal to the wireless communication unit 220.
- the antenna unit 210 of the present embodiment has a plurality of antenna elements and can form a beam.
- the wireless communication unit 220 transmits and receives signals.
- the wireless communication unit 220 receives the downlink signal from the base station 100 and transmits the uplink signal to the base station 100.
- the wireless communication unit 220 of the present embodiment can form a plurality of beams by the antenna unit 210 and communicate with the base station 100.
- Storage unit 230 The storage unit 230 temporarily or permanently stores the program and various data for the operation of the terminal device 200.
- Control unit 240 controls the operation of the entire terminal device 200 to provide various functions of the terminal device 200.
- the control unit 240 includes a determination unit 241, a determination unit 242, and a notification unit 243.
- the determination unit 241 determines the information to be transmitted to the other terminal device 200 or the base station 100 by the determination unit 251.
- Such information is decision information used for determination of a plurality of master UEs 200M by another terminal device 200 or base station 100. Details of the decision information will be described later.
- the determination unit 242 uses one of the plurality of master UEs 200Ms based on the information acquired from the other terminal device 200 or the base station 100. Determine if it exists.
- the information acquired by the determination unit 242 from the other terminal device 200 or the base station 100 is determination information for determining a plurality of master UEs 200M. Details of such decision information will be described later.
- the notification unit 243 notifies the other terminal device 200 or the base station 100 of the determination information determined by the determination unit 241. Further, when the determination unit 242 determines that the own device is one of a plurality of master UEs 200M, the notification unit 243 notifies the base station 100 of the determination result.
- the control unit 240 may further include other components other than these components. That is, the control unit 240 can perform operations other than the operations of these components.
- the method of determining the plurality of master UEs 200M includes a method of autonomously determining the plurality of terminal devices 200 belonging to the group 12 and a method of determining by a device other than the group 12 (for example, the base station 100). be.
- the terminal device 200 acquires decision information for determining a plurality of master UEs 200M (an example of the master device).
- the terminal device 200 determines whether or not its own device is one of a plurality of master UEs 200M based on the acquired determination information. For example, the decision information is acquired from the terminal device 200, another terminal device 200, or the base station 100.
- the decision information may include the following information: ⁇ Received power information ⁇ Location information ⁇ Capability information ⁇ Coverage information ⁇ Assistance information from base stations
- the terminal device 200 acquires at least one of the above-mentioned information from another terminal device 200 or the base station 100, and determines whether or not the own device is the master UE 200M based on the acquired information.
- the received power determination information includes information on the received power of the signal received from the base station 100. Examples of the received power include the following specified in TS38.215. ⁇ RSRP (Reference Signal Received Power) ⁇ RSRQ (Reference Signal Received Quality) ⁇ RSSI (Received Signal Strength Indicator) ⁇ SIR (Signal to Interference Ratio)
- the terminal device 200 transmits information on the received power of the own device to another terminal device 200 belonging to the same group 12 as the own device, and acquires information on the received power from the other terminal device 200.
- the terminal device 200 compares the acquired received power with the received power of the own device, and if the received power of the own device is included within the nth order from the largest, the terminal device 200 determines that the own device is one of a plurality of master UEs 200M. judge.
- the communication system 1 can determine n terminal devices 200 having high received power as the master UE 200M from the plurality of terminal devices 200 included in the group 12.
- the terminal device 200 having the highest received power may be determined to be pmUE200MP, and the terminal device 200 having low received power may be determined to be smUE200MS.
- the received power of the smUE200MS may increase.
- the terminal device 200 having a low reception power also functions as a plurality of master UEs 200M, so that a communication system 1 capable of responding to changes in communication conditions can be constructed. Thereby, the low delay and high reliability of the communication system 1 can be further improved.
- the determination information includes the position information of the terminal device 200.
- Examples of the position information of the terminal device 200 include the following. -Information indicating the relative positional relationship with the base station 100-Information indicating the relative positional relationship of the terminal device 200 in the group 12-Information indicating the absolute position of the terminal device 200
- the terminal device 200 transmits information on the distance between the own device and the base station 100 to another terminal device 200 belonging to the same group 12 as the own device, and transmits information on the distance from the other terminal device 200 to the base station 100. get.
- the terminal device 200 compares the acquired distance with the distance of the own device, and if the distance of the own device is included within the nth position from the shortest, the terminal device 200 determines that the own device is one of a plurality of master UEs 200M.
- the communication system 1 can determine n terminal devices 200 having a short distance from the base station 100 as the master UE 200M from the plurality of terminal devices 200 included in the group 12.
- the terminal device 200 compares the acquired distance with the distance of the own device, and when the distance of the own device is within n1th from the shortest or within n2th from the longest, the own device It may be determined that it is one of a plurality of master UEs 200M.
- the communication system 1 determines n1 terminal devices 200 having a short distance from the base station 100 and n2 terminal devices 200 having a long distance from the plurality of terminal devices 200 included in the group 12 as the master UE 200M. can do.
- the terminal device 200 has a plurality of own devices when the own device is the rightmost terminal device 200 or the leftmost terminal device 200 when viewed from the base station 100 in the area of the group 12. It is determined that it is one of the master UE 200M.
- information indicating the direction seen from the base station 100 for example, there is information about a beam transmitted by the base station 100.
- beamforming is performed by the base station 100.
- the base station 100 forms a plurality of beams and transmits a signal.
- Information (beam ID) for identifying the beam is assigned to the beam.
- the terminal device 200 transmits information on the beam ID to another terminal device 200 belonging to the same group 12 as the own device, and acquires information on the beam ID from the other terminal device 200, for example.
- the terminal device 200 compares the acquired beam ID with the beam ID of the own device, and determines that the own device is one of a plurality of master UEs 200M when the beam ID of the own device is the largest or the smallest. .. Alternatively, when the acquired beam ID or the beam ID of the own device is a predetermined value (for example, zero), the terminal device 200 determines that the device corresponding to the beam ID is one of the plurality of master UEs 200M. .. Alternatively, the terminal device 200 may use a function or the like shared within the group 12 to determine whether or not its own device is one of a plurality of master UEs 200M. Such a function may be, for example, a function for determining the terminal device 200 located at the rightmost end or the leftmost end with respect to the base station 100 as a plurality of master UEs 200M in the area of the group 12.
- the terminal device 200 can select a plurality of terminal devices 200 whose directions are separated from the base station 100 as a plurality of master UEs 200M.
- a plurality of master UEs 200M are determined according to the positional relationship between the base station 100 and the terminal device 200, but the present invention is not limited to this.
- the terminal device 200 may determine the plurality of master UEs 200M from the positional relationship of the plurality of terminal devices 200 regardless of the positional relationship with the base station 100.
- a Zone that divides the area of the group 12 into a predetermined area is set, and identification information (Zone ID) is set for each Zone.
- the terminal device 200 transmits, for example, the Zone ID of the Zone in which the own device is located to another terminal device 200 as decision information.
- the terminal device 200 determines whether or not its own device is one of a plurality of master UEs 200M by using, for example, a function shared within the group 12. It is assumed that such a function is, for example, a function in which terminal devices 200 located in different zones are set to be selected as a plurality of master UEs 200M.
- each terminal device 200 may be installed in a predetermined place such as a side mirror or a windshield.
- the plurality of master UEs 200M may be determined according to the installation locations of the plurality of terminal devices 200.
- the terminal device 200 can select a plurality of terminal devices 200 separated from each other in the group 12 as a plurality of master UEs 200M.
- the terminal device 200 may determine the plurality of master UEs 200M from the absolute position information of the plurality of terminal devices 200, not based on the relative position information.
- absolute position information for example, there is position information acquired by GPS (Global Positioning System).
- the terminal device 200 acquires the position information of its own device by measuring the Positioning Reference Signal transmitted from the LTE or NR base station 100.
- the terminal device 200 transmits the acquired position information to another terminal device 200.
- the terminal device 200 determines whether or not the own device is one of a plurality of master UEs 200M based on the position information of the own device and the position information of another terminal device 200. Such a determination is the same as a determination using relative position information. For example, when the absolute position information of the base station 100 is known, it depends on the distance between the base station 100 and the terminal device 200 based on the position information of the base station 100 and the position information of the terminal device 200. , Multiple master UEs 200M can be selected. In addition to that, a plurality of master UEs 200M may be selected according to the direction viewed from the base station 100 and the positional relationship of the plurality of terminal devices 200.
- the communication system 1 can select a plurality of master UEs 200M in the absolute position information of the terminal device 200 as well as the relative position information.
- Capability information The determination information described above includes the Capability information of the terminal device 200.
- Capability information may include at least one of the following information: ⁇ Maximum transmission power (Power class) ⁇ Capability related to transmission and reception of side link communication ⁇ Capability of sending and receiving in Uu link
- the capability information of the terminal device 200 may include information on the maximum transmission power (Power class) of the terminal device 200.
- Power class the terminal device 200 whose maximum transmission power is equal to or higher than a predetermined threshold value is selected as one of the plurality of master UEs 200M.
- the capability information of the terminal device 200 may include capability information regarding transmission / reception of side link communication. More specifically, the capability information may include information indicating whether or not transmission or reception is possible on a channel (for example, PSCCH, PSSCH, PSFCH, etc.) in a predetermined side link communication. For example, a terminal device 200 capable of transmitting or receiving on a channel in a predetermined side link communication is selected as one of the plurality of master UEs 200M.
- a channel for example, PSCCH, PSSCH, PSFCH, etc.
- the capability information of the terminal device 200 may include the capability information of transmission / reception in Uu link. That is, the capability information of the terminal device 200 may include information indicating whether or not transmission or reception is possible on at least one of the downlink and the uplink to and from the base station 100. For example, the terminal device 200 capable of transmitting or receiving in Uulink is selected as one of the plurality of master UEs 200M.
- the determination information includes information (coverage information) indicating whether or not the terminal device 200 is within the coverage of the base station 100.
- the terminal device 200 which is at least within the coverage of the base station 100, is selected as one of the plurality of master UEs 200M.
- the terminal device 200 measures the received power of the reference signal transmitted from the base station 100, and transmits the measurement result to another terminal device 200 as coverage information.
- the terminal device 200 determines that it can be one of a plurality of master UEs 200M at least when the measurement result of its own device is equal to or higher than a predetermined threshold value. In other words, the terminal device 200 whose received power of at least the reference signal is equal to or higher than a predetermined threshold value is selected as one of the plurality of master UEs 200M.
- the terminal device 200 transmits the received power of the reference signal transmitted by the own device to the base station 100 to the other terminal device 200 as coverage information.
- the terminal device 200 determines that it can be one of a plurality of master UEs 200M when the measurement result at the base station 100 is at least a predetermined threshold value or more. In other words, the terminal device 200 whose received power of at least the reference signal at the base station 100 is equal to or higher than a predetermined threshold value is selected as one of the plurality of master UEs 200M.
- the above-mentioned decision information is information transmitted by the terminal device 200 to another terminal device 200, but is not limited thereto.
- the decision information may include Assistance information transmitted by the base station 100 to a plurality of terminal devices 200.
- the Assistance information includes at least one of the information acquired by the base station 100 from each terminal device 200 and the information determined based on the information.
- the base station 100 acquires at least one of the above-mentioned received power information, position information, and Capability information from the terminal device 200, for example.
- the terminal device 200 transmits at least one of the received power information, the position information, and the Capability information to the base station 100 instead of transmitting it to the other terminal device 200.
- the base station 100 transmits at least one of the acquired received power information, position information, and Capability information to the terminal device 200.
- the base station 100 may transmit a list of a plurality of terminal devices 200 belonging to the group 12 to the terminal device 200 as decision information.
- the terminal device 200 that has acquired this information determines whether or not its own device is one of a plurality of master UEs 200M based on the acquired information.
- the base station 100 may determine the terminal device 200 recommended as the plurality of master UEs 200M (hereinafter, also referred to as a plurality of master candidate terminals) based on the information acquired from the terminal device 200.
- the base station 100 can determine a plurality of master candidate terminals in the same manner as the determination by the terminal device 200 whether or not the master UE is 200M. In this case, the base station 100 notifies the terminal device 200 of the information regarding the determined plurality of master candidate terminals as candidate information.
- the terminal device 200 determines that the own device is one of the plurality of master UEs 200M.
- the base station 100 may determine the terminal device 200 (hereinafter, also referred to as an exclusion candidate terminal) that is not recommended as a plurality of master UEs 200M based on the information acquired from the terminal device 200. For example, the base station 100 may determine the terminal device 200 whose received power is equal to or less than the threshold value as an exclusion candidate based on the received power information. Alternatively, the base station 100 can determine the exclusion candidate terminal based on the Capability information, for example, the terminal device 200 whose maximum transmission power is equal to or less than the threshold value is determined as the exclusion candidate terminal.
- the base station 100 notifies the terminal device 200 of the information regarding the determined exclusion candidate terminal as exclusion information.
- the terminal device 200 determines that the own device is not one of the plurality of master UEs 200M.
- the terminal device 200 acquires the decision information, and based on the acquired decision information and a predetermined standard, whether or not the own device is one of a plurality of master UEs 200M. To judge.
- the terminal device 200 notifies the other terminal device 200 or the base station 100 of the decision information regarding the own device.
- the decision information may include various information described above, but in the following, in order to simplify the explanation, the terminal device 200 notifies the other terminal device 200 of the information regarding the received power as the decision information. And.
- FIG. 7 is a sequence diagram showing an example of the flow of the determination process according to the embodiment of the present disclosure.
- terminal devices 200A to 200D are described.
- the base station 100 first transmits a reference signal to the terminal devices 200A to 200D (step S101).
- the reference signal transmitted by the base station 100 is a signal for the terminal device 200 to measure the received power, and for example, CSI-RS (Channel state information-reference signal) is used.
- CSI-RS Channel state information-reference signal
- the CSI-RS is notified to, for example, all the terminal devices 200 in the group 12.
- the terminal devices 200A to 200D measure the received power of the reference signal (step S102).
- the terminal device 200A notifies the terminal devices 200B to 200D of the measurement result as decision information by groupcast transmission (step S103).
- the terminal device 200B notifies the terminal devices 200A, 200C, and 200D of the measurement result as decision information by groupcast transmission (step S104).
- the terminal device 200C notifies the terminal devices 200A, 200B, and 200D of the measurement result as decision information by groupcast transmission (step S105).
- the terminal device 200D notifies the terminal devices 200A to 200C of the measurement result as decision information by groupcast transmission (step S106).
- the terminal device 200 transmits the decision information using, for example, at least one of PSCCH and PSSCH.
- the decision information may be information on the physical layer or information on the upper layer (MAC, RRC, etc.).
- terminal devices 200A to 200D can transmit and receive side link communication at the same time, a part or all of the terminal devices 200A to 200D may transmit the decision information at the same time. That is, the terminal devices 200A to 200D may simultaneously perform the processes of steps S103 to S106.
- the terminal devices 200A to 200D cannot transmit and receive side link communication at the same time, in other words, perform either transmission or reception, the terminal devices 200A to 200D are different from each other as shown in FIG. Send decision information at the timing.
- the transmission timing (transmission order) of the determination information by the terminal devices 200A to 200D shall be determined based on the identification number or the like assigned to the terminal devices 200A to 200D in advance.
- the terminal devices 200A to 200D determine whether or not the own device is one of a plurality of master UEs 200M based on the received decision information (step S107). For example, when the received power of the own device is within the second from the largest, the terminal device 200 determines that the own device is one of a plurality of master UEs 200M. Here, for example, it is assumed that the terminal devices 200A and 200B are determined to be one of the plurality of master UEs 200M.
- One of the terminal devices 200A and 200B determined to be one of the plurality of master UEs 200M notifies the base station 100 of information regarding the plurality of master UEs 200M as master UE information (step). S108).
- the terminal device 200B transmits the master UE information using, for example, an uplink channel such as at least one of PUCCH and PUSCH.
- the terminal device 200B may transmit the master UE information using a side link link channel such as at least one of PSCCH and PSSCH.
- one of the terminal devices 200A and 200B determined to be one of the plurality of master UEs 200M notifies the base station 100 of the information regarding the plurality of master UEs 200M as the master UE information, but the present invention is limited to this. Not done.
- Each of the terminal devices 200A and 200B determined to be one of the plurality of master UEs 200M may notify the base station 100 of information regarding the plurality of master UEs 200M as master UE information.
- the terminal device 200 shares the decision information for determining the plurality of master UEs 200M within the group 12, and determines the plurality of master UEs 200M based on the criteria shared in advance. As a result, the terminal device 200 can determine a plurality of master UEs 200M.
- the number of terminal devices 200 belonging to the group 12 is set to 4, and the number of the plurality of master UEs 200M is set to 2, but the number is not limited to this.
- the number of terminal devices 200 belonging to the group 12 may be two or more, and may be three or four or more. Further, the plurality of master UEs 200M may be three or more.
- the selection terminal device 200 of the master UE reselects the master UE 200M when the selection trigger is applied. In this reselection, at least one of the plurality of master UEs 200M may be reselected. That is, not all master UEs 200M need to be reselected by this reselection.
- the selection trigger is transmitted to, for example, the base station 100 and the terminal device 200 in which at least one of the plurality of master UEs 200M belongs to the group 12.
- the master UE 200M satisfying a predetermined condition may transmit the selection trigger.
- a master UE 200M having a high priority (order) such as pm UE 200MP may transmit a selection trigger.
- the conditions for transmitting the selection trigger include the following examples. ⁇ Time ⁇ Received power ⁇ Location information ⁇ Coverage information
- Time can be mentioned as a trigger condition.
- the master UE 200M executes selection by transmitting a selection trigger every predetermined time (for example, X milliseconds) elapses.
- the predetermined time X may be set randomly, for example, or may be specified by the base station 100.
- the trigger condition includes the received power with and from the base station 100.
- the master UE 200M performs reselection when the received power with the base station 100 becomes equal to or less than a predetermined threshold value.
- the positional relationship of the terminal device 200 can be mentioned.
- the master UE 00M performs reselection when the spatial correlation with the other terminal device 200 becomes close and becomes equal to or less than a predetermined threshold value.
- the master UE 200M performs reselection when the distance from the other terminal device 200 becomes equal to or less than a predetermined threshold value.
- the terminal device 200 that has received the selection trigger from the master UE 200M shares the decision information and determines whether or not the own device is one of a plurality of master UEs 200M, in the same manner as the above-described method for determining the master UE 200M. Reselection will be carried out at.
- the selection trigger may be transmitted depending on whether or not the same information as the decision information used for selecting the plurality of master UEs 200M satisfies a predetermined condition.
- the base station 100 determines a plurality of master UEs 200M.
- the base station 100 sets a plurality of master UEs 200Ms of the group 12 to be set at the timing of setting the plurality of terminal devices 200 in one group 12.
- the base station 100 acquires decision information from a plurality of terminal devices 200 in the group 12, and determines a plurality of master UEs 200M based on the acquired decision information.
- the determination information and the determination method of the plurality of master UEs 200M are the same as the case where the terminal device 200 described above determines the plurality of master UEs 200M.
- the base station 100 notifies the terminal device 200 in the group 12 of the master UE information regarding the determined plurality of master UEs 200M. At this time, the base station 100 may notify the master UE information to all the terminal devices 200 in the group 12, or may notify the master UE information to the terminal device 200 determined to the master UE 200M.
- the base station 100 sets, for example, the terminal device 200 determined through the signaling of the RRC (upper layer) in the master UE 200M.
- the base station 100 acquires the decision information and determines a plurality of master UEs 200M based on the acquired decision information and a predetermined standard.
- the base station 100 notifies the information regarding the determined plurality of master UEs 200M.
- FIG. 8 is a sequence diagram showing another example of the flow of the determination process according to the embodiment of the present disclosure.
- terminal devices 200A to 200D are described.
- the base station 100 first transmits a request signal requesting transmission of decision information to the terminal devices 200A to 200D (step S201).
- the request signal is transmitted using a downlink channel, such as at least one of PDCCH and PDSCH.
- the request signal may be transmitted using a sidelink link channel such as at least one of PSCCH and PSSCH.
- FIG. 8 shows, as an example, the case where the request signal is notified by the group cast transmission in the side link communication.
- the terminal devices 200A to 200D transmit the decision information to the base station 100 in response to the request signal (step S202).
- the terminal devices 200A to 200D transmit the determination information to the base station 100 at the transmission timing included in the request signal, for example.
- the decision information is transmitted using an uplink channel such as at least one of PUCCH and PUSCH.
- the decision information may be transmitted using a sidelink link channel such as at least one of PSCCH and PSSCH.
- the decision information may be information on the physical layer or information on the upper layer (MAC, RRC, etc.).
- the terminal devices 200A to 200D may transmit the decision information at the same time.
- the terminal devices 200A to 200D perform frequency division multiplexing or code division multiplexing using at least one of a different frequency resource and a different code resource to transmit the determination information.
- the terminal devices 200A to 200D may transmit the decision information at different timings.
- the transmission timing (transmission order) of the determination information by the terminal devices 200A to 200D may be transmitted according to the timing included in the request signal as described above.
- the transmission timing may be determined based on an identification number or the like assigned in advance to the terminal devices 200A to 200D.
- the base station 100 determines a plurality of master UEs 200M based on the acquired determination information (step S203). Here, it is assumed that the base station 100 determines the terminal devices 200A and 200D as a plurality of master UEs 200M.
- the base station 100 transmits the master UE information regarding the determined plurality of master UEs 200M to the terminal devices 200A and 200D (step S204).
- FIG. 8 shows a case where the base station 100 individually notifies the terminal devices 200A and 200D of the master UE information by unicast transmission. In addition to this, the base station 100 may notify all the terminal devices 200A to 200D of the master UE information by groupcast transmission.
- the master UE information is transmitted using a downlink channel such as at least one of PDCCH and PDSCH.
- the master UE information may be transmitted using a side link channel such as at least one of PSCCH and PSSCH.
- the base station 100 acquires the decision information for determining the plurality of master UEs 200M from the terminal device 200 in the group 12 and determines the plurality of master UEs 200M. As a result, the base station 100 can determine a plurality of master UEs 200M.
- the number of terminal devices 200 belonging to the group 12 is set to 4, and the number of the plurality of master UEs 200M is set to 2, but the number is not limited to this.
- the number of terminal devices 200 belonging to the group 12 may be two or more, and may be three or four or more. Further, the plurality of master UEs 200M may be three or more.
- the base station 100 and the terminal device 200 perform the selection of the plurality of master UEs 200M according to the selection trigger.
- the trigger condition for performing the selection may be the same as the trigger condition described above.
- the transmission of the selection trigger may be performed by the base station 100 or may be performed by a plurality of master UEs 200M. Further, the plurality of master UEs 200M may transmit the selection request to the base station 100, and the base station 100 may transmit the selection trigger. When the base station 100 transmits the selection trigger, the plurality of master UEs 200M transfer the received selection trigger to the terminal device 200 in the group 12 when the selection trigger is received.
- the selection request may be transmitted by the terminal device 200 in the group 12.
- the terminal device 200 transmits a selection request to the master UE 200M.
- the master UE 200M that has received the selection request transmits the selection trigger if the own device can transmit the selection trigger.
- the base station 100 transmits a selection trigger
- the master UE 200M transfers the selection request to the base station 100.
- the terminal device 200 that has received the selection trigger transmits information used for selection of a plurality of master UEs 200M to the base station 100 based on the selection trigger.
- the information used for the selection may be transmitted to the base station 100 via, for example, a plurality of master UEs 200M.
- the information used for the selection may be the same as the decision information used in the determination of the plurality of master UEs 200M.
- the reselection trigger may reselect all of the plurality of master UEs 200M, or at least one master UE 200M may be reselected.
- the terminal device 200 or the base station 100 determines a plurality of master UEs 200M, but the present invention is not limited to this.
- a plurality of master UEs 200M may be determined by a device other than the terminal device 200 and the base station 100.
- the installer who installs the terminal device 200 or the user who uses the service of the communication system 1 may determine a plurality of master UEs 200M.
- the terminal device 200 belonging to the group 12 is a sensor, a camera, or the like installed in the vehicle
- the communication system 1 is a system that provides an Intra-vehicle network service.
- the installer who installs the sensor, the camera, or the like in the vehicle may determine a plurality of master UEs 200M at the time of system construction.
- the installer may determine a plurality of master UEs 200M depending on, for example, the position of the terminal device 200 and the type of function to be provided (for example, the type of sensor).
- a user who uses the Intra-vehicle network service may determine a plurality of master UEs 200M before using the service, for example.
- the installer and the user are collectively described as the decision-maker.
- the deciding person determines a plurality of master UEs 200M based on the information displayed on a display device (not shown) such as a display provided in the vehicle, for example.
- terminal information regarding a terminal device 200 (hereinafter, also referred to as a candidate terminal) that is a candidate for a plurality of master UEs 200M can be displayed.
- Such terminal information includes, for example, identification information for identifying a candidate terminal, a display name set for the candidate terminal, and the like.
- the terminal information and the decision information may be displayed in association with each other on the display device. For example, a list in which the terminal information and the received power of the candidate terminal corresponding to the terminal information are associated with each other may be displayed.
- the received power may be displayed as numerical information or may be displayed as icon information indicating the strength.
- the terminal information of the candidate terminal can be displayed on the display device together with the surrounding situation (for example, a map or a vehicle image).
- the display device may display an icon indicating a candidate terminal superimposed on an image diagram of the vehicle.
- the display method can be changed according to the priority (recommendation degree) as a candidate for a plurality of master UEs 200M.
- the display device emphasizes the terminal information according to the priority, such as changing the display color according to the priority of the plurality of master UEs 200M or changing the size of the characters. May be good.
- the deciding person selects at least one of the plurality of master UEs 200M based on the terminal information displayed on the display device.
- the determiner selects at least one of the plurality of master UEs 200M using, for example, a mouse, keyboard, touch panel, or the like.
- the terminal device 200 or the base station 100 belonging to the group 12 determines the remaining master UE 200M. For example, the terminal device 200 or the base station 100 belonging to the group 12 may determine the remaining master UE 200M based on the determination method described above.
- the determinant may determine the pmUE200MP, and the terminal device 200 or the base station 100 may determine the smUE200MS.
- the decision-maker can set at least one of the plurality of master UEs 200M.
- the selection of the plurality of master UEs 200M may also be performed by the deciding person in the manner of selecting the plurality of master UEs 200M.
- a person other than the deciding person may decide a plurality of master UEs 200M.
- a device other than the terminal device 200 and the base station 100 such as a node of the core network of the communication system 1, may determine a plurality of master UEs 200M.
- the plurality of master UEs 200M may be prioritized (ordered) according to their functions.
- the plurality of master UEs 200M can be divided into one primary master UE (pmUE) 200MP and at least one secondary master UE (smUE) 200MS.
- a priority may be set among the plurality of smUE200MS.
- the setting method of the pmUE200MP and the smUE200MS is the same as the determination method of the plurality of master UEs 200M described above. In addition, different determination methods may be adopted for pmUE200MP and smUE200MS.
- the base station 100 may determine the pmUE 200MP, and the terminal device 200 may determine the smUE 200MS.
- the decision information used for the decision may be different, such that the pmUE200MP is determined based on the received power and the smUE200MS is not determined based on the position information of the terminal device 200.
- the pmUE200MP and the smUE200MS are given different roles and may realize different functions.
- the pmUE 200MP can realize at least one of the following functions. -Communication with base station 100-Control of terminal device 200-Determining physical resources-Determining smUE200MS-Communication control of smUE200MS
- the pmUE 200MP has a communication function with the base station 100, and is given a role of communicating with the base station 100. That is, the pmUE 200MP communicates with the base station 100 on behalf of the group 12.
- the pmUE200MP controls the smUE200MS and at least one of all the terminal devices 200 in the group 12 by controlling the transmission of signals or control information related to a predetermined function.
- the predetermined function includes at least one of the following functions. -Resource selection and / or sensing-Synchronization (frame synchronization, symbol synchronization) ⁇ HARQ feedback ⁇ CSI (Channel state information) report
- the pmUE200MP provides, for example, information about resources suitable for transmission by a predetermined terminal device 200 (for example, permission list information, acceptable list information) to the smUE200MS and at least one of all the terminal devices 200 in the group 12. Send. Specifically, it transmits information about resources that are not reserved to other terminal devices 200.
- the other terminal device 200 may be a terminal device 200 belonging to the same group 12 as the pmUE 200MP, or a terminal device 200 belonging to a different group 12.
- the pmUE200MP transmits, for example, information about resources unsuitable for transmission by the predetermined terminal device 200 (for example, block list information, drop list information) to the smUE200MS and at least one of all the terminal devices 200 in the group 12. do. Specifically, it transmits information about resources already reserved by another terminal device 200.
- the other terminal device 200 may be a terminal device 200 belonging to the same group 12 as the pmUE 200MP, or a terminal device 200 belonging to a different group 12.
- the pmUE200MP transmits, for example, an S-SSB (Sidelink-Synchronization Signal and physical broadcast channel Block) as a signal and channel required for synchronization.
- S-SSB Systemlink-Synchronization Signal and physical broadcast channel Block
- the pmUE200MP sets the resources of the channel (for example, PSFCH) required for HARQ feedback, for example.
- the pmUE200MP for example, sets the resources of the channels (for example, PSSCH, PSFCH) required for CSI reporting.
- the pmUE200MP determines, for example, physical resources in group 12 (eg, resource pool, Sidelink BWP (Sidelink Bandwidth Part)).
- group 12 eg, resource pool, Sidelink BWP (Sidelink Bandwidth Part)
- the pmUE200MP determines the same physical resource set by the base station 100 as the physical resource in the group 12.
- the pmUE200MP may determine and notify individual physical resources for each smUE200MS or terminal device 200 in the group 12.
- the pmUE200MP determines, for example, the smUE200MS within group 12.
- the method for determining the smUE 200MS by the pm UE 200MP may be, for example, the same method as the determination of the plurality of master UEs 200M by the base station 100.
- the pmUE200MP notifies the smUE200MS or the terminal device 200 in the group 12 of the information regarding the determined smUE200MS.
- the pmUE 200MP may determine subgroups.
- the pmUE200MP sets subgroups by determining at least one terminal device 200 to communicate with for each smUE200MS.
- the pmUE200MP controls communication with the base station 100 by, for example, the smUE200MS.
- the pmUE200MP controls the data and information transmitted by the smUE200MS to the base station 100.
- Such control may include control of the content of information to be transmitted, the timing of transmission, the channel used for transmission, and the like.
- the pmUE200MP may control the data and information received from the base station 100 by the smUE200MS.
- the smUE200MS can realize at least one of the following functions. -Communication with base station 100-Communication with pmUE 200MP-Control of subgroup terminal device 200
- the smUE200MS has a communication function with the base station 100, and may be given a role of communicating with the base station 100. That is, the smUE 200MS may communicate with the base station 100 on behalf of the group 12.
- the smUE200MS has a communication function with the pmUE200MP, and may be given a role of communicating with the pmUE200MP. For example, when at least one subgroup is set in the group 12, the smUE200MS may communicate with the pmUE200MP on behalf of the subgroup.
- the smUE200MS controls the terminal device 200 by controlling the transmission of signals or control information related to a predetermined function to the terminal device 200 (for example, the terminal device 200 belonging to a subgroup) to be controlled by the own device. ..
- the predetermined function is the same as the above-mentioned function.
- a plurality of master UEs 200M can be set from the terminal devices 200 in the group 12. Thereby, it is possible to provide the communication system 1 capable of realizing lower delay and higher reliability. Further, even when a new terminal device 200 is added to the group 12, a plurality of master UEs 200M can be reconfigured, and the group 12 can be constructed more easily.
- the master UE 200M communicates with the base station 100 or the terminal device 200 in the group 12, but the present invention is not limited to this.
- the master UE 200M may communicate with the master UE 200M of another group 12 or the terminal device 200 of another group 12.
- a plurality of master UEs 200M may perform side link communication with the terminal device 200 of another group 12 in addition to communication with the base station 100 on behalf of the group 12.
- the plurality of master UEs 200M may include a master UE 200M that communicates with the base station 100 and a master UE 200M that communicates with the terminal device 200 of another group 12.
- FIG. 9 is a diagram for explaining an application example of the communication system 1 according to the embodiment of the present disclosure.
- one group 12 is formed by a plurality of sensors and cameras mounted on the automobile.
- the cameras 7910, 7912, 7914, 7916, 7918 are mounted on the vehicle 7900.
- sensors 7920, 7926, 7930 are mounted on the vehicle 7900.
- These cameras 7910, 7912, 7914, 7916, 7918, and the lidar devices 7920, 7926, 7930 have a communication function and correspond to the terminal device 200 belonging to the same group 12 of the embodiment of the present disclosure.
- the cameras 7910, 7912, 7914, 7916, 7918 are provided, for example, at at least one of the front nose, side mirrors, rear bumpers, back door, and upper part of the windshield of the vehicle interior of the vehicle 7900.
- FIG. 9 shows an example of the shooting range of each of the cameras 7910, 7912, 7914, 7916, and 7918.
- the imaging range a indicates the imaging range of the camera 7910 provided on the front nose
- the imaging ranges b and c indicate the imaging ranges of the cameras 7912 and 7914 provided on the side mirrors, respectively
- the imaging range d indicates the rear bumper or the rear bumper.
- the imaging range of the camera 7916 provided on the back door is shown.
- the sensors 7920, 7926, 7930 are, for example, LIDAR devices, and are mainly used for detecting a preceding vehicle, a pedestrian, an obstacle, or the like.
- the cameras 7910, 7912, 7914, 7916, 7918, and the sensors 7920, 7926, 7930 determine whether or not the own device is one of a plurality of master UEs 200M.
- the device communicates with another terminal device 200 in the group 12 and also communicates with a base station 100 (not shown).
- the base station 100 can perform communication on a vehicle-by-vehicle basis. Further, by setting a plurality of master UEs 200M, it is possible to perform communication with lower delay and higher reliability.
- this technology can also be applied to inter-vehicle communication.
- a plurality of vehicles form one group 12.
- Smart factory The technology according to the present disclosure may be applied to a smart factory utilizing AI (Artificial Intelligence) technology or IoT (Internet of Things) technology.
- AI Artificial Intelligence
- IoT Internet of Things
- the device is automatically controlled by using various data acquired from the device arranged in the factory.
- FIG. 10 is a diagram for explaining an application example of the communication system 1 according to the embodiment of the present disclosure.
- a large number of industrial robots as shown in FIG. 10 are installed in the factory.
- a sensor or a motor is arranged in the robot for each joint, and the sensor detects the angle and speed of the joint and transmits control information to the motor.
- one group 12 is formed by a plurality of sensors and motors mounted on one robot. That is, the plurality of sensors and motors mounted on the robot have a communication function and function as a terminal device 200 belonging to one group 12.
- the base station 100 (not shown) installed in the factory can communicate in units of robots, and robots can be easily added or changed.
- the technique according to the present disclosure may be applied to smart surgery utilizing AI (Artificial Intelligence) technology or IoT (Internet of Things) technology.
- AI Artificial Intelligence
- IoT Internet of Things
- the technique can be applied to remote surgery.
- FIG. 11 is a diagram for explaining an application example of the communication system 1 according to the embodiment of the present disclosure.
- the practitioner 520 when the practitioner 520 and the patient 540 are separated from each other, the practitioner 520 operates the arm device 510a, and the arm device 510b operates in the same manner with respect to the patient 540. Surgery is performed.
- the practitioner 520 performs the operation while checking the image imaged by the camera 560 installed near the patient 540 and displayed on the display device 550, for example.
- the locations separated from each other may be, for example, different hospitals, adjacent adjacent rooms in the same hospital, remote locations in the same operating room, and the like.
- the arm devices 510a and 510b, the camera 560, and the display device 550 are connected to each other via, for example, the network N1.
- one group 12 is formed by the arm device 510a and the display device 550 arranged in the space where the practitioner 520 is (for example, an operating room).
- the master UE 200M of the group 12 connects to the network N1 via the base station 100 (not shown). That is, it is assumed that the arm device 510a and the display device 550 have a communication function and correspond to the terminal device 200 of the present technology.
- one group 12 is formed by the arm device 510b and the camera 560 arranged in the space where the patient 540 is (for example, an operating room).
- the master UE 200M of the group 12 connects to the network N1 via the base station 100 (not shown). That is, it is assumed that the arm device 510b and the camera 560 have a communication function and correspond to the terminal device 200 of the present technology.
- various devices arranged in the operating room such as a sensor for detecting the state of the patient 540 and a lighting device, are the terminal devices 200 of the present technology. Can correspond to.
- the senor or the like mounted on the arm devices 510a and 510b may correspond to the terminal device 200 of the present technology.
- a plurality of master UEs 200M are set from the terminal devices 200 included in the group 12. This makes it possible to perform communication with low delay and high reliability.
- the present invention is not limited to this. This technique can also be applied to, for example, automatic surgery.
- each step in the process performed by each device of the present specification does not necessarily have to be processed in chronological order in the order described as a sequence diagram.
- each step in the process executed by each device may be processed in an order different from the order described in the sequence diagram, or may be processed in parallel.
- the present technology can also have the following configurations.
- a wireless communication device including a control unit.
- the wireless communication device according to any one of (1) to (3), wherein the control unit receives the determination information from the base station.
- the decision information includes at least one of the candidate information about the wireless communication device which is a candidate for the plurality of master devices and the exclusion information about the wireless communication device which is excluded from the plurality of master devices, according to (4).
- the determination information includes the received power to and from the base station, the position information of the plurality of wireless communication devices, the capability information of the plurality of wireless communication devices, and the coverage of the base station by each of the plurality of wireless communication devices.
- the wireless communication device according to any one of (1) to (5), which includes at least one of information indicating whether or not the information is present in the device.
- the control unit determines that the own device is the master device, the control unit transmits the determination result to at least one of the base station and the plurality of wireless communication devices, any one of (1) to (6).
- the wireless communication device described in 1. The control unit redetermines whether or not the own device is the master device when the reselection condition for reselecting the master device is satisfied, any one of (1) to (7).
- the wireless communication device described in 1. The plurality of master devices are any of (1) to (8), including a first master device having a high priority for communication with the base station and a second master device having a low priority.
- the wireless communication device according to one.
- the first master device communicates with the base station and communicates with the base station.
- the second master device communicates with the base station according to the communication state between the first master device and the base station.
- the wireless communication device according to (9).
- the first master device communicates with the base station and communicates with the base station.
- the second master device performs the side link communication with the first master device, and performs the side link communication.
- the plurality of wireless communication devices perform the side link communication with the second master device.
- the wireless communication device according to (9) or (10). (12) Acquire decision information for determining a plurality of master devices that communicate with a base station from a plurality of wireless communication devices that perform side-link communication. Based on the decision information, the plurality of master devices are determined, and Notify the determined information about the plurality of master devices, A base station equipped with a control unit.
- a plurality of wireless communication devices that perform side-link communication and a base station that communicates with at least one of the plurality of wireless communication devices are provided.
- the wireless communication device is Obtaining decision information for determining a plurality of master devices that communicate with the base station, Based on the determination information, it is determined whether or not the own device is one of the plurality of master devices.
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Abstract
Description
1.はじめに
1.1.サイドリンク通信の一例
1.2.課題
1.3.提案技術の概要
2.通信システムの構成
2.1.通信システムの全体構成
2.2.基地局の構成
2.3.端末装置の構成
3.複数のマスターUEの決定方法
3.1.端末装置による決定方法
3.2.基地局による決定方法
3.3.その他
4.マスターUEの種別
5.その他の実施形態
6.適用例
7.まとめ
本開示の実施形態について詳細に説明する前に、本開示の実施形態の背景について説明する。実施形態の背景として、まずサイドリンク通信の一例について簡単に説明する。
図1は、サイドリンク通信を行う通信システム1aの一例を説明するための図である。図1に示す通信システム1aは、基地局100aと、複数の端末装置200aと、を含む。
上述したように、通信システム1aでは、グループを代表してマスターUE200mが基地局100aと通信を行う。マスターUE200mと基地局100aとの通信環境が悪化した場合、マスターUE200mの再選択や、グループ内のネットワークの再構築などが発生する恐れがある。そのため、マスターUE200mと基地局100aとの通信が再開されるまでに、通信遅延が発生してしまう。
そこで、本開示の技術では、1つのグループ内でマスターUE(マスター装置の一例)を複数設定し、複数のマスターUEと基地局とがそれぞれ通信を行う。これにより、本開示の技術では、基地局との通信に冗長性を持たせることができる。
<2.1.通信システムの全体構成>
続いて、図2を参照しながら、提案技術が適用されるシステムの概略的な構成の一例を説明する。図2は、本開示の実施形態に係る通信システム1の概略的な構成の一例を示す図である。図2に示すように、システム1は、基地局100、端末装置200、コアネットワーク(Core Network)20、およびPDN(Packet Data Network)30を含む。
図5は、本開示の実施形態に係る基地局100の構成の一例を示すブロック図である。図5を参照すると、基地局100は、アンテナ部110、無線通信部120、ネットワーク通信部130、記憶部140及び制御部150を備える。
アンテナ部110は、無線通信部120により出力される信号を電波として空間に放射する。また、アンテナ部110は、空間の電波を信号に変換し、当該信号を無線通信部120へ出力する。なお、本実施形態のアンテナ部110は、複数のアンテナ素子を有し、ビームを形成し得る。
無線通信部120は、信号を送受信する。例えば、無線通信部120は、端末装置200へのダウンリンク信号を送信し、端末装置200からのアップリンク信号を受信する。なお、本実施形態の無線通信部120は、アンテナ部110により複数のビームを形成して端末装置200と通信し得る。
ネットワーク通信部130は、情報を送受信する。例えば、ネットワーク通信部130は、他のノードへの情報を送信し、他のノードからの情報を受信する。例えば、上記他のノードは、他の基地局100及びコアネットワークノードを含む。
記憶部140は、基地局100の動作のためのプログラム及び様々なデータを一時的に又は恒久的に記憶する。
制御部150は、基地局100全体の動作を制御して、基地局100の様々な機能を提供する。制御部150は、決定部151及び通知部152を含む。
例えば、基地局100が複数のマスターUE200Mを決定する場合、決定部151は、端末装置200から取得する情報に基づき、複数のマスターUE200Mを決定する。決定部151が端末装置200から取得する情報は、複数のマスターUE200Mを決定するための決定情報である。かかる決定情報の詳細については後述する。
通知部152は、決定部151の決定結果を端末装置200に通知する。例えば、基地局100が複数のマスターUE200Mを決定する場合、通知部152は、決定部151が決定した複数のマスターUE200Mに対して、マスターUE200Mに決定した旨の通知を行う。
図6は、本開示の実施形態に係る端末装置200の構成の一例を示すブロック図である。図6を参照すると、端末装置200は、アンテナ部210、無線通信部220、記憶部230及び制御部240を備える。
アンテナ部210は、無線通信部220により出力される信号を電波として空間に放射する。また、アンテナ部210は、空間の電波を信号に変換し、当該信号を無線通信部220へ出力する。なお、本実施形態のアンテナ部210は、複数のアンテナ素子を有し、ビームを形成し得る。
無線通信部220は、信号を送受信する。例えば、無線通信部220は、基地局100からのダウンリンク信号を受信し、基地局100へのアップリンク信号を送信する。なお、本実施形態の無線通信部220は、アンテナ部210により複数のビームを形成して基地局100と通信し得る。
記憶部230は、端末装置200の動作のためのプログラム及び様々なデータを一時的に又は恒久的に記憶する。
制御部240は、端末装置200全体の動作を制御して、端末装置200の様々な機能を提供する。制御部240は、決定部241、判定部242及び通知部243を含む。
例えば、決定部241は、決定部251は、他の端末装置200又は基地局100に送信する情報を決定する。かかる情報は、他の端末装置200又は基地局100による複数のマスターUE200Mの決定に用いられる決定情報である。決定情報の詳細については後述する。
また、例えば、端末装置200が、複数のマスターUE200Mを決定する場合、判定部242は、他の端末装置200又は基地局100から取得する情報に基づき、自装置が複数のマスターUE200Mの1つであるか否かを判定する。判定部242が他の端末装置200又は基地局100から取得する情報は、複数のマスターUE200Mを決定するための決定情報である。かかる決定情報の詳細については後述する。
通知部243は、決定部241が決定した決定情報を他の端末装置200又は基地局100に通知する。また、通知部243は、判定部242によって自装置が複数のマスターUE200Mの1つであると判定された場合、判定結果を基地局100に通知する。
続いて、複数のマスターUE200Mの決定方法について説明する。上述したように、複数のマスターUE200Mの決定方法は、グループ12に属する複数の端末装置200が自律的に決定する方法と、グループ12以外の装置(例えば、基地局100)が決定する方法とがある。
まず、グループ12に属する複数の端末装置200が自律的に複数のマスターUE200Mを決定する方法について説明する。この場合、端末装置200は、複数のマスターUE200M(マスター装置の一例)を決定するための決定情報を取得する。端末装置200は、取得した決定情報に基づき、自装置が複数のマスターUE200Mの1つであるか否かを判定する。例えば、端末装置200、他の端末装置200又は基地局100から決定情報を取得する。
まず、決定情報の一例について説明する。決定情報には、以下の情報が含まれ得る。
・受信電力情報
・位置情報
・Capability情報
・カバレッジ情報
・基地局からのAssistance情報
決定情報には、基地局100から受信した信号の受信電力に関する情報が含まれる。受信電力として、例えば、TS38.215で規定されている以下のものが挙げられる。
・RSRP(Reference Signal Received Power)
・RSRQ(Reference Signal Received Quality)
・RSSI(Received Signal Strength Indicator)
・SIR(Signal to Interference Ratio)
決定情報には、端末装置200の位置情報が含まれる。端末装置200の位置情報として、例えば以下のものが挙げられる。
・基地局100との相対的な位置関係を示す情報
・グループ12内での端末装置200の相対的な位置関係を示す情報
・端末装置200の絶対的な位置を示す情報
基地局100との相対的な位置関係として、例えば、基地局100と端末装置200との距離がある。端末装置200は、自装置と同じグループ12に属する他の端末装置200に、自装置と基地局100との距離に関する情報を送信し、他の端末装置200から基地局100との距離に関する情報を取得する。
上述した位置情報を用いる方法では、基地局100と端末装置200との位置関係に応じて複数のマスターUE200Mを決定するとしたが、これに限定されない。例えば、端末装置200は、複数のマスターUE200Mを、基地局100との位置関係によらず、複数の端末装置200の位置関係から決定するようにしてもよい。
端末装置200は、複数のマスターUE200Mを、相対的な位置情報によらず、複数の端末装置200の絶対的な位置情報から決定するようにしてもよい。
上述した決定情報には、端末装置200のCapability情報が含まれる。Capability情報には、以下の情報の少なくとも1つが含まれ得る。
・最大送信電力(Power class)
・サイドリンク通信の送受信に関するcapability
・Uu linkにおける送受信のcapability
決定情報には、端末装置200が、基地局100のカバレッジ内であるか否かを示す情報(カバレッジ情報)が含まれる。例えば、少なくとも基地局100のカバレッジ内である端末装置200が、複数のマスターUE200Mの1つとして選択される。
上述した決定情報は、端末装置200が他の端末装置200に送信する情報であるとしたが、これに限定されない。例えば、決定情報に、基地局100が複数の端末装置200に送信するAssistance情報が含まれていてもよい。Assistance情報は、基地局100が各端末装置200から取得した情報、及び、当該情報に基づいて決定した情報の少なくとも1つが含まれる。
次に、通信システム1における複数のマスターUE200Mの決定処理の流れについて説明する。上述したように、通信システム1では、端末装置200は、決定情報を取得し、取得した決定情報とあらかじめ決められた基準とに基づき、自装置が複数のマスターUE200Mの1つであるか否かを判定する。
端末装置200は、リセレクショントリガーがかかった場合に、マスターUE200Mの再選択を実施する。この再選択では、複数のマスターUE200Mのうち少なくとも1つのマスターUE200Mの再選択が行われ得る。すなわち、この再選択によって、必ずしも全てのマスターUE200Mが再選択されなくてもよい。
・時間
・受信電力
・位置情報
・カバレッジ情報
トリガー条件として、時間が挙げられる。例えば、マスターUE200Mは、所定時間(例えばXミリ秒)経過ごとにリセレクショントリガーを送信することでリセレクションを実施する。所定時間Xは、例えば、ランダムに設定されてもよく、基地局100が指定してもよい。
トリガー条件として、基地局100との間の受信電力が挙げられる。例えば、マスターUE200Mは、基地局100との受信電力が所定のしきい値以下になった場合にリセレクションを実施する。
トリガー条件として、端末装置200の位置関係が挙げられる。例えば、マスターUE00Mは、他の端末装置200との空間的な相関が近くなり、所定しきい値以下になった場合にリセレクションを実施する。例えば、マスターUE200Mは、他の端末装置200との距離が所定しきい値以下になった場合にリセレクションを実施する。
トリガー条件として、マスターUE200Mが基地局100のカバレッジの範囲内であるか否かが挙げられる。例えば、マスターUE200Mは、基地局100のカバレッジ外になった場合にリセレクションを実施する。
次に、基地局100が複数のマスターUE200Mを決定する方法について説明する。この場合、基地局100は、複数の端末装置200を1つのグループ12に設定するタイミングで、設定するグループ12のマスターUE200Mを複数設定する。
なお、上述した決定方法では、端末装置200又は基地局100が複数のマスターUE200Mを決定するとしたがこれに限定されない。端末装置200及び基地局100以外が複数のマスターUE200Mを決定してもよい。
上述したように、複数のマスターUE200Mは、機能に応じて優先順位(序列)が設定され得る。例えば、複数のマスターUE200Mは、1つのプライマリーマスターUE(pmUE)200MPと、少なくとも1つのセカンダリーマスターUE(smUE)200MSと、に分けられ得る。
pmUE200MPは、以下の機能の少なくとも1つを実現し得る。
・基地局100との通信
・端末装置200の制御
・物理リソースの決定
・smUE200MSの決定
・smUE200MSの通信制御
pmUE200MPは、基地局100との通信機能を有し、基地局100との通信を行う役割が与えられる。すなわち、pmUE200MPは、グループ12を代表して基地局100と通信を行う。
pmUE200MPは、smUE200MS、及び、グループ12内の全ての端末装置200の少なくとも一方に対して、所定の機能に関する信号又は制御情報の送信制御を行うことで、これらの装置を制御する。
・リソース選択及び/又はセンシング
・同期(フレーム同期、シンボル同期)
・HARQフィードバック
・CSI(Channel state information)レポート
pmUE200MPは、例えば、所定の端末装置200による送信に好適なリソースに関する情報(例えば、許可リスト情報、受け入れ可能リスト情報)をsmUE200MS、及び、グループ12内の全ての端末装置200の少なくとも一方に対して送信する。具体的には、他の端末装置200に予約されていないリソースに関する情報を送信する。ここで他の端末装置200は、pmUE200MPと同じグループ12に属する端末装置200であってもよく、異なるグループ12に属する端末装置200であってもよい。
pmUE200MPは、例えば、同期に必要な信号及びチャネルとして、S-SSB(Sidelink-Synchronization Signal and physical broadcast channel Block)を送信する。
pmUE200MPは、例えば、HARQフィードバックに必要なチャネル(例えば、PSFCH)のリソースの設定を行う。
pmUE200MPは、例えば、CSIレポートに必要なチャネル(例えば、PSSCH、PSFCH)のリソースの設定を行う。
pmUE200MPは、例えば、グループ12内の物理リソース(例えば、リソースプール、Sidelink BWP(Sidelink Bandwidth Part))を決定する。
pmUE200MPは、例えば、グループ12内のsmUE200MSを決定する。pmUE200MPによるsmUE200MSの決定方法は、例えば、基地局100による複数のマスターUE200Mの決定と同じ方法であってよい。pmUE200MPは、決定したsmUE200MSに関する情報をsmUE200MS又はグループ12内の端末装置200に通知する。
pmUE200MPは、例えば、smUE200MSによる基地局100との通信を制御する。例えば、pmUE200MPは、smUE200MSが基地局100に送信するデータや情報を制御する。かかる制御には、送信する情報の内容や、送信のタイミング、送信に使用するチャネルなどの制御が含まれ得る。また、同様にして、pmUE200MPは、smUE200MSが基地局100から受信するデータや情報を制御するようにしてもよい。
smUE200MSは、以下の機能の少なくとも1つを実現し得る。
・基地局100との通信
・pmUE200MPとの通信
・サブグループの端末装置200の制御
上述した実施形態では、マスターUE200Mが、基地局100又はグループ12内の端末装置200と通信を行うとしたが、これに限定されない。マスターUE200Mが、他のグループ12のマスターUE200M、又は、他のグループ12の端末装置200と通信を行うようにしてもよい。
(Intra-vehicle通信)
本開示に係る技術(本技術)は、様々なシステムへ応用することができる。例えば、本開示に係る技術は、自動車のIntra-vehicle networkに適用されてもよい。
本開示に係る技術は、AI(Artificial Intelligence)技術やIoT(Internet of Things)技術を活用したSmart factoryに適用されてもよい。例えば、Automation factoryでは、工場内に配置される装置から取得される種々のデータを用いて、当該装置が自動で制御される。
また、本開示に係る技術は、AI(Artificial Intelligence)技術やIoT(Internet of Things)技術を活用したスマート手術に適用されてもよい。例えば、本技術は、リモート手術に適用され得る。
本明細書の各装置が実行する処理における各ステップは、必ずしもシーケンス図として記載された順序に沿って時系列に処理する必要はない。例えば、各装置が実行する処理における各ステップは、シーケンス図として記載した順序と異なる順序で処理されても、並列的に処理されてもよい。
(1)
複数の無線通信装置によるサイドリンク通信を行う前記無線通信装置であって、
前記サイドリンク通信において基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、自装置が前記複数のマスター装置の1つであるか否かを判定する、
制御部を備える無線通信装置。
(2)
前記制御部は、前記サイドリンク通信を行う前記複数の無線通信装置それぞれに、前記決定情報を送信する、(1)に記載の無線通信装置。
(3)
前記制御部は、前記複数の無線通信装置それぞれから前記決定情報を受信する、(1)又は(2)に記載の無線通信装置。
(4)
前記制御部は、前記基地局から前記決定情報を受信する、(1)~(3)のいずれか1つに記載の無線通信装置。
(5)
前記決定情報は、前記複数のマスター装置の候補とする前記無線通信装置に関する候補情報、及び、前記複数のマスター装置から除外する前記無線通信装置に関する除外情報の少なくとも一方を含む、(4)に記載の無線通信装置。
(6)
前記決定情報は、前記基地局との間の受信電力、前記複数の無線通信装置の位置情報、前記複数の無線通信装置のケイパビリティ情報、及び、前記複数の無線通信装置それぞれが前記基地局のカバレッジ内に存在するか否かを示す情報のうちの少なくとも1つを含む(1)~(5)のいずれか1つに記載の無線通信装置。
(7)
前記制御部は、自装置が前記マスター装置であると判定した場合、判定結果を前記基地局及び前記複数の無線通信装置の少なくとも1つに送信する、(1)~(6)のいずれか1つに記載の無線通信装置。
(8)
前記制御部は、前記マスター装置を再選択するための再選択条件を満たす場合に、自装置が前記マスター装置であるか否かの再判定を行う、(1)~(7)のいずれか1つに記載の無線通信装置。
(9)
前記複数のマスター装置は、前記基地局との通信の優先度が高い第1のマスター装置と、前記優先度が低い第2のマスター装置と、を含む、(1)~(8)のいずれか1つに記載の無線通信装置。
(10)
前記第1のマスター装置は、前記基地局と通信を行い、
前記第2のマスター装置は、前記第1のマスター装置と前記基地局との通信状態に応じて前記基地局と通信を行う、
(9)に記載の無線通信装置。
(11)
前記第1のマスター装置は、前記基地局と通信を行い、
前記第2のマスター装置は、前記第1のマスター装置と前記サイドリンク通信を行い、
前記複数の無線通信装置は、前記第2のマスター装置と前記サイドリンク通信を行う、
(9)又は(10)に記載の無線通信装置。
(12)
サイドリンク通信を行う複数の無線通信装置の中から、基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、前記複数のマスター装置を決定し、
決定した前記複数のマスター装置に関する情報を通知する、
制御部を備える基地局。
(13)
サイドリンク通信を行う複数の無線通信装置と、前記複数の無線通信装置の少なくとも1つと通信を行う基地局とを備え、
前記無線通信装置は、
前記基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、自装置が前記複数のマスター装置の1つであるか否かを判定する、
制御部を備える通信システム。
(14)
複数の無線通信装置がサイドリンク通信を行う前記無線通信装置による通信方法であって、
前記サイドリンク通信において基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、自装置が前記複数のマスター装置の1つであるか否かを判定する、
通信方法。
(15)
サイドリンク通信を行う複数の無線通信装置の中から、基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、前記複数のマスター装置を決定し、
決定した前記複数のマスター装置に関する情報を通知する、
通信方法。
200 端末装置
200M マスターUE
110、210 アンテナ部
120、220 無線通信部
130 ネットワーク通信部
140、230 記憶部
150、240 制御部
151、241 決定部
242 判定部
152、243 通知部
Claims (15)
- 複数の無線通信装置によるサイドリンク通信を行う前記無線通信装置であって、
前記サイドリンク通信において基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、自装置が前記複数のマスター装置の1つであるか否かを判定する、
制御部を備える無線通信装置。 - 前記制御部は、前記サイドリンク通信を行う前記複数の無線通信装置それぞれに、前記決定情報を送信する、請求項1に記載の無線通信装置。
- 前記制御部は、前記複数の無線通信装置それぞれから前記決定情報を受信する、請求項1に記載の無線通信装置。
- 前記制御部は、前記基地局から前記決定情報を受信する、請求項1に記載の無線通信装置。
- 前記決定情報は、前記複数のマスター装置の候補とする前記無線通信装置に関する候補情報、及び、前記複数のマスター装置から除外する前記無線通信装置に関する除外情報の少なくとも一方を含む、請求項4に記載の無線通信装置。
- 前記決定情報は、前記基地局との間の受信電力、前記複数の無線通信装置の位置情報、前記複数の無線通信装置のケイパビリティ情報、及び、前記複数の無線通信装置それぞれが前記基地局のカバレッジ内に存在するか否かを示す情報のうちの少なくとも1つを含む請求項1に記載の無線通信装置。
- 前記制御部は、自装置が前記マスター装置であると判定した場合、判定結果を前記基地局及び前記複数の無線通信装置の少なくとも1つに送信する、請求項1に記載の無線通信装置。
- 前記制御部は、前記マスター装置を再選択するための再選択条件を満たす場合に、自装置が前記マスター装置であるか否かの再判定を行う、請求項1に記載の無線通信装置。
- 前記複数のマスター装置は、前記基地局との通信の優先度が高い第1のマスター装置と、前記優先度が低い第2のマスター装置と、を含む、請求項1に記載の無線通信装置。
- 前記第1のマスター装置は、前記基地局と通信を行い、
前記第2のマスター装置は、前記第1のマスター装置と前記基地局との通信状態に応じて前記基地局と通信を行う、
請求項9に記載の無線通信装置。 - 前記第1のマスター装置は、前記基地局と通信を行い、
前記第2のマスター装置は、前記第1のマスター装置と前記サイドリンク通信を行い、
前記複数の無線通信装置は、前記第2のマスター装置と前記サイドリンク通信を行う、
請求項9に記載の無線通信装置。 - サイドリンク通信を行う複数の無線通信装置の中から、基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、前記複数のマスター装置を決定し、
決定した前記複数のマスター装置に関する情報を通知する、
制御部を備える基地局。 - サイドリンク通信を行う複数の無線通信装置と、前記複数の無線通信装置の少なくとも1つと通信を行う基地局とを備え、
前記無線通信装置は、
前記基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、自装置が前記複数のマスター装置の1つであるか否かを判定する、
制御部を備える通信システム。 - 複数の無線通信装置がサイドリンク通信を行う前記無線通信装置による通信方法であって、
前記サイドリンク通信において基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、自装置が前記複数のマスター装置の1つであるか否かを判定する、
通信方法。 - サイドリンク通信を行う複数の無線通信装置の中から、基地局と通信する複数のマスター装置を決定するための決定情報を取得し、
前記決定情報に基づき、前記複数のマスター装置を決定し、
決定した前記複数のマスター装置に関する情報を通知する、
通信方法。
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