WO2023037480A1 - 端末、基地局及び通信方法 - Google Patents
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- WO2023037480A1 WO2023037480A1 PCT/JP2021/033223 JP2021033223W WO2023037480A1 WO 2023037480 A1 WO2023037480 A1 WO 2023037480A1 JP 2021033223 W JP2021033223 W JP 2021033223W WO 2023037480 A1 WO2023037480 A1 WO 2023037480A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- 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
- H04W84/06—Airborne or Satellite Networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to terminals, base stations and communication methods in wireless communication systems.
- NR New Radio
- LTE Long Term Evolution
- NTN Non-Terrestrial Network
- satellites artificial satellites
- the terminals are shared satellite orbit data from the base station. Based on the satellite orbit data and the position information obtained by the GNSS (Global Navigation Satellite System), the terminal calculates a value indicating the timing advance for the service link and pre-corrects the Doppler shift for frequency correction. Or post-correction can be performed.
- GNSS Global Navigation Satellite System
- the present invention has been made in view of the above points, and aims to provide a technology that enables the application of satellite orbit-based mechanisms to aircraft-based non-terrestrial networks.
- a receiving unit that receives information indicating the trajectory or position of a flying object that relays communication with a base station; a control unit for performing time or frequency synchronization in communication with the base station relaying the body.
- a technology that enables satellite orbit-based mechanisms to be applied to aircraft-based non-terrestrial networks.
- FIG. 1 is a first diagram for explaining a non-terrestrial network
- FIG. FIG. 4 is a second diagram for explaining a non-terrestrial network
- FIG. 13 is a third diagram for explaining the non-terrestrial network
- FIG. 14 is a fourth diagram for explaining the non-terrestrial network
- FIG. 10 is a diagram for explaining enhancement of timing advance
- FIG. 4 is a diagram for explaining enhancement of frequency synchronization
- FIG. 4 is a diagram for explaining a method of sharing satellite orbit data
- FIG. 4 is a diagram for explaining a first information set of satellite orbit data
- FIG. 4 is a diagram for explaining a second information set of satellite orbit data
- FIG. 4 is a diagram for explaining trajectory data of an aircraft;
- FIG. 4 is a diagram for explaining a case where the trajectory of the flying object is not horizontal to the ground; It is a figure showing an example of functional composition of a base station in an embodiment of the invention. It is a figure which shows an example of the functional structure of the terminal in embodiment of this invention. It is a figure showing an example of hardware constitutions of a base station or a terminal in an embodiment of the invention. It is a figure showing an example of composition of vehicles in an embodiment of the invention.
- existing technology may be used as appropriate.
- the existing technology is, for example, existing NR or LTE, but is not limited to existing NR or LTE.
- LTE Long Term Evolution
- LTE-Advanced and LTE-Advanced and subsequent systems eg, NR
- SS Synchronization signal
- PSS Primary SS
- SSS Secondary SS
- PBCH Physical broadcast channel
- PRACH Physical random access channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other (for example, Flexible Duplex etc.) method may be used.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- configure of wireless parameters and the like may mean that predetermined values are pre-configured (pre-configured).
- the wireless parameters notified from may be set.
- Fig. 1 is the first diagram for explaining the non-terrestrial network.
- a Non-Terrestrial Network uses non-terrestrial equipment such as satellites to provide services to areas that terrestrial 5G networks cannot cover mainly due to cost. .
- NTN can provide more reliable services. For example, it is assumed to be applied to IoT (Inter of things), ships, buses, trains, and critical communications. NTN also has scalability through efficient multicast or broadcast.
- a satellite 10A retransmits a signal transmitted from a terrestrial base station 10B to provide service to an area where no terrestrial base station is deployed, such as mountainous areas. can be done.
- a terrestrial 5G network includes one or more base stations 10 and terminals 20 .
- the base station 10 is a communication device that provides one or more cells and wirelessly communicates with the terminal 20 .
- a physical resource of a radio signal is defined in the time domain and the frequency domain.
- the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks.
- the base station 10 transmits synchronization signals and system information to the terminal 20 . Synchronization signals are, for example, NR-PSS and NR-SSS.
- the system information is transmitted by, for example, NR-PBCH, and is also called broadcast information.
- the base station 10 transmits control signals or data to the terminal 20 on DL (Downlink), and receives control signals or data from the terminal 20 on UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Also, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Also, both the base station 10 and the terminal 20 may communicate via SCell (Secondary Cell) and PCell (Primary Cell) by CA (Carrier Aggregation).
- SCell Secondary Cell
- PCell Primary Cell
- the terminal 20 is a communication device with a wireless communication function, such as a smartphone, mobile phone, tablet, wearable terminal, or M2M (Machine-to-Machine) communication module.
- the terminal 20 receives a control signal or data from the base station 10 on the DL and transmits the control signal or data to the base station 10 on the UL, thereby using various communication services provided by the wireless communication system.
- FIG. 2 is a second diagram for explaining the non-terrestrial network.
- the area per cell or beam in NTN is very large compared to terrestrial networks (Terrestrial Network, TN).
- FIG. 2 shows an example of an NTN composed of retransmissions by satellite.
- the connection between satellite 10A and NTN gateway 10B is called a feeder link, and the connection between satellite 10A and UE 20 is called a service link.
- the difference in delay between the near side UE 20A and the far side UE 20B is, for example, 10.3 ms for Geosynchronous orbit (GEO). , 3.2 ms in the case of LEO (Low Earth orbit).
- the beam size in NTN is, for example, 3500 km for GEO and 1000 km for LEO.
- FIG. 3 is a third diagram for explaining the non-terrestrial network.
- NTN is implemented by satellites in space or air vehicles in the air.
- a GEO satellite may be a satellite located at an altitude of 35,786 km and having a geostationary orbit.
- a LEO satellite may be a satellite located at an altitude of 500-2000 km and orbiting with a period of 88-127 minutes.
- HAPS High Altitude Platform Station
- HAPS High Altitude Platform Station
- GEO satellites, LEO satellites and HAPS air vehicles may be connected to ground stations gNB via gateways. Also, the service area may increase in order of HAPS, LEO, and GEO.
- NTN can extend the coverage of 5G networks to unserviced or serviced areas. Also, for example, NTN can improve service continuity, availability and reliability on ships, buses, trains or other critical communications. Note that the NTN may be notified by transmitting a dedicated parameter to the terminal 20, and the dedicated parameter is, for example, based on information related to the satellite or the aircraft. Related to TA (Timing Advance) determination It may be a parameter.
- FIG. 4 is a fourth diagram for explaining the non-terrestrial network.
- FIG. 4 shows an example of the NTN network architecture assumed for transparent payloads.
- CN Core Network
- gNB 10C Gateway 10B
- Gateway 10B is connected to satellite 10A via a feeder link.
- Satellite 10A is connected to terminal 20A or VSAT (Very small aperture terminal) 20B via a service link.
- NR Uu is established between gNB 10C and terminal 20A or VSAT 20B.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- terrestrial cells may be fixed or mobile.
- Terminal 20 may also have GNSS (Global Navigation Satellite System) capability.
- FR1 may assume a power class 3 handheld device.
- a VSAT device may also be assumed, at least in FR2.
- NTN's network architecture may assume a regenerative payload.
- gNB functionality may be onboard a satellite or air vehicle.
- the gNB-DU may be mounted on a satellite or air vehicle, and the gNB-CU may be deployed as a ground station.
- HARQ feedback may be disabled. If HARQ feedback is disabled, two consecutive DL transport blocks can be sent in one HARQ process without waiting for feedback.
- FIG. 5 is a diagram for explaining enhancement of timing advance.
- the downlink or uplink timing is adjusted only at the Reference Point (RP). That is, the RP is adjusted so that the timings of the downlink and the uplink are aligned.
- the RP is flexibly determined between the terrestrial base station 10C or gateway 10B and the satellite 10A or HAPS according to the network implementation. Note that the terrestrial base station 10C and the gateway 10B are collectively referred to as the base station 10 below.
- the RP in the base station 10 needs to broadcast information frequently via the feeder link for easy network implementation. Also, the RP in satellite 10A or HAPS requires backward compatibility of regenerated payload or ISL/IAL.
- the timing advance value TTA may be calculated by the following formula.
- T TA (N TA + N TA, UE-specific + N TA, common + N TA, offset ) x T c
- N TA is 0 for PRACH and is the TA command field contained in msg2/msgB and TA command MAC CE.
- N TA, UE-specific is the terminal self-estimated TA of the service link delay based on the GNSS acquired position and satellite orbit. That is, the TA for the propagation delay associated with the service link.
- N TA,common is a value broadcast by the network and may be 0. Broadcast methods, update methods, that is, timing drift correction methods, etc. are being studied. That is, the TA for the propagation delay associated with the feeder link.
- N TA,offset is a fixed offset according to the band and LTE/NRcoex, and is defined in Section 4.2 of Non-Patent Document 2.
- FIG. 6 is a diagram for explaining enhancement of frequency synchronization.
- conventional technologies such as NR, techniques have been developed for correcting frequencies in both the downlink and uplink in response to frequency shifts accompanying movement of LEO, HAPS, and the like.
- the first method is to correct the Doppler shift and transponder error on the feeder link by the network without affecting the specifications.
- a first method is, for example, pre-correction performed by the gateway 10B.
- the second method is a method in which the terminal 20A corrects the Doppler shift occurring in the service link.
- the second method is, for example, pre-correction or post-correction based on the position information obtained by GNSS and the satellite orbit performed by the terminal 20A.
- FIG. 7 is a diagram for explaining a method of sharing satellite orbit data.
- Terminal 20A self-estimates the timing advance of the service link delay.
- Terminal 20A also corrects for Doppler shift in the service link.
- step S1 the base station 10 (the gateway 10B and the ground base station 10C) receives satellite orbit data from the satellite 10A.
- the satellite orbital data reception interval is on the order of minutes, and the accuracy life of the satellite orbital data is on the order of hours.
- step S2 base station 10 (gateway 10B and ground base station 10C) shares information with terminal 20A via satellite 10A.
- the terminal 20A estimates the destination of the satellite 10A based on the satellite orbit data, and thereby performs the above-described self-estimation of the timing advance and correction of the Doppler shift.
- FIG. 8 is a diagram for explaining the first information set of satellite orbit data.
- the first set of satellite orbital data is the position (x, y, z) and velocity (vx, vy, vz) states of the satellite 10A represented by ECEF (acronym for earth-centered, earth-fixed) coordinates.
- ECEF synchrom for earth-centered, earth-fixed coordinates.
- is a vector representing The first information set provides low computational complexity and is compatible with HAPS/ATG.
- FIG. 9 is a diagram for explaining the second information set of satellite orbit data.
- a second information set of satellite orbital data includes orbital elements consisting of Keplerian elements that approximate the satellite orbit to an ellipse.
- the second information set of the satellite orbit data includes the length ⁇ [m] of the quasi-principal axis of the ellipse, the eccentricity e, the declination angle ⁇ [rad] at the periapsis, the longitude ⁇ [rad] of the ascending node , the tilt angle i[rad] and the mean angle of periapsis M[rad] at the origin time t0 .
- the second information set estimation with higher precision is possible, and thus longer period broadcasting can be realized.
- An air vehicle is a device that relays communications between base stations and terminals in a non-terrestrial network.
- FIG. 10 is a diagram for explaining trajectory data of an aircraft.
- the trajectory data of the flying object 10E may include information indicating at least one of the following.
- Vehicle/trajectory altitude Rate of change of vehicle/trajectory altitude Vehicle position Radius or diameter of the trajectory (if the trajectory is approximated to a circle) ⁇ Semi-principal axis and eccentricity of the orbit (if the orbit is approximated to an ellipse) ⁇ Orbital shape (circle, ellipse, figure 8, etc.) ⁇ Period ⁇ Reference point of trajectory ⁇ Reference position ⁇ Velocity and/or rate of change of velocity at reference time
- the orbital data of the flying object 10E may be data obtained by modifying the format of the NR release 17 satellite orbital data for HAPS.
- the orbital data of the aircraft 10E may be data including the following information among the satellite orbital data of the NR release 17. ⁇ Length of semi-major axis of ellipse ⁇ [m] ⁇ Eccentricity e ⁇ Average angle of near point M [rad] at starting point time t0
- the orbital data of the flying object 10E may be data obtained by excluding the following information from the satellite orbital data of the NR release 17. ⁇ Argument angle ⁇ [rad] at the near point ⁇ Ascending node yellow longitude ⁇ [rad] ⁇ Tilt angle i [rad]
- the orbital data of the flying object 10E may be data obtained by adding the following information to the satellite orbital data of the NR Release 17. ⁇ Orbit reference position X - The altitude of the flying object 10E or the rate of change in altitude
- the terminal 20A may assume that the trajectory of the flying object 10E is approximated horizontally with the ground. Conversely, the terminal 20A may assume that the trajectory of the flying object 10E is not approximated horizontally with the ground.
- FIG. 11 is a diagram for explaining the case where the trajectory of the flying object is not horizontal to the ground.
- the trajectory data of the flying object 10E may include at least one of the declination angle ⁇ [rad] at the periapsis, the ascending node longitude ⁇ [rad], and the inclination angle i [rad].
- the terminal 20A may perform different operations depending on whether it is in a relatively stationary state or not. Examples of different operations are described below.
- Example 2 In a second embodiment, an example will be described in which information indicating the trajectory or position of the flying object is transmitted to the terminal via the network.
- the base station 10 receives from the flying object 10E information indicating the trajectory or position of the flying object 10E that relays communication with the terminal 20A.
- the base station 10 then transmits information indicating the trajectory or position of the flying object 10E to the terminal 20A via the flying object 10E.
- the terminal 20A is explicitly indicated via the network which information among the information indicating the trajectory or position of the flying object 10E is to be transmitted.
- the terminal 20A may assume that the network type is indicated via the network.
- the network type is, for example, TN, satellite-based NTN, HAPS-based NTN, or the like.
- Terminal 20A may assume that information indicating the trajectory or position of the corresponding air vehicle is sent over the network based on the network type.
- Example 3 describes an example in which a terminal uses information for time or frequency synchronization.
- the terminal 20A may calculate the timing advance value of the service link based on the information indicating the trajectory or position of the flying object 10E and/or the position information obtained by GNSS.
- the terminal 20A may perform pre-correction or post-correction of the Doppler shift based on information indicating the trajectory or position of the flying object 10E and/or position information obtained by GNSS.
- Example 4 In a fourth embodiment, an example will be described in which the terminal assumes that the information indicating the trajectory or position of the flying object is valid within a given period.
- the terminal 20A When the terminal 20A acquires information indicating the trajectory or position of the flying object 10E, it may be assumed that the information is valid without an expiration date. Alternatively, the terminal 20A may assume that the information is valid as long as the RRC CONNECTED state is maintained. Note that, as shown in the first embodiment, when the terminal 20A is notified of the information indicating that the flying object 10E is relatively stationary as viewed from the terminal 20A, the terminal 20A determines the trajectory or position of the flying object 10E. It may be assumed that the information presented is valid without an expiration date.
- the terminal 20A When the terminal 20A acquires information indicating the trajectory or position of the flying object 10E, the terminal 20A may assume that the information is valid until it receives information related to updating.
- the terminal 20 may assume that the update information is sent via RRC signaling specific to the terminal 20A, MAC-CE or DCI.
- the terminal 20 may assume that the update information is transmitted within the cell (among the plurality of terminals 20A) via common signaling.
- Signaling common within a cell is, for example, SIB, group common DCI, and the like.
- the terminal 20A when the terminal 20A is not notified of the information indicating that the flying object 10E is relatively stationary as viewed from the terminal 20A, It may be assumed that information indicating the trajectory or position of the air vehicle 10E is valid. That is, the terminal 20A may not assume that the information is valid without an expiration date when the information indicating that the flying object 10E is relatively stationary as viewed from the terminal 20A is not notified.
- the terminal 20A may assume that the expiration date of the information indicating the trajectory or position of the flying object 10E is predetermined. Then, when the information indicating the trajectory or position of the flying object 10E expires, the terminal 20A may receive update information and update the information by the method described above.
- the terminal 20A may assume that the information regarding the expiration date is defined in advance in the specifications, or that the information regarding the expiration date is included in the information indicating the trajectory or position of the flying object 10E. .
- the base stations 10 and terminals 20 contain the functionality to implement the embodiments described above. However, each of the base station 10 and the terminal 20 may have only the functions proposed in any of the embodiments.
- FIG. 12 is a diagram showing an example of the functional configuration of the base station 10.
- the base station 10 has a transmitting section 110, a receiving section 120, a setting section 130, and a control section 140.
- the functional configuration shown in FIG. 12 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.
- the transmitting unit 110 and the receiving unit 120 may be called a communication unit.
- the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal.
- the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher layer information from the received signals.
- the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DL data, etc. to the terminal 20 . Also, the transmission unit 110 transmits the setting information and the like described in the embodiment.
- the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads them from the storage device as necessary.
- the control unit 140 performs overall control of the base station 10 including control related to signal transmission/reception, for example. It should be noted that the functional unit related to signal transmission in control unit 140 may be included in transmitting unit 110 , and the functional unit related to signal reception in control unit 140 may be included in receiving unit 120 . Also, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.
- FIG. 13 is a diagram showing an example of the functional configuration of the terminal 20.
- the terminal 20 has a transmitter 210 , a receiver 220 , a setter 230 and a controller 240 .
- the functional configuration shown in FIG. 13 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.
- the transmitting unit 210 and the receiving unit 220 may be called a communication unit.
- the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
- the receiving unit 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal. Also, the transmitting unit 210 transmits HARQ-ACK, and the receiving unit 220 receives the setting information and the like described in the embodiment.
- the setting unit 230 stores various types of setting information received from the base station 10 by the receiving unit 220 in the storage device, and reads them from the storage device as necessary.
- the setting unit 230 also stores preset setting information.
- the control unit 240 performs overall control of the terminal 20 including control related to signal transmission/reception. It should be noted that the functional unit related to signal transmission in control unit 240 may be included in transmitting unit 210 , and the functional unit related to signal reception in control unit 240 may be included in receiving unit 220 . Also, the transmitting section 210 and the receiving section 220 may be called a transmitter and a receiver, respectively.
- the terminal or base station of this embodiment may be configured as a terminal or base station shown in each section below. Also, the following communication methods may be implemented.
- (Section 1) a receiving unit that receives information indicating the trajectory or position of an aircraft that relays communication with a base station; a control unit that synchronizes time or frequency in communication with the base station that relays the flying object based on the information indicating the trajectory or position of the flying object; terminal.
- the information indicative of the trajectory or position of the vehicle includes altitude of the vehicle or trajectory, rate of change of altitude of the vehicle or trajectory, position of the vehicle, radius or diameter of the trajectory, semi-principal axis of the trajectory.
- the receiving unit receives information explicitly indicating which information is to be transmitted among the information indicating the trajectory or position of the flying object;
- a terminal according to Clause 1. The control unit calculates the timing advance value of the service link or corrects the Doppler shift based on the information indicating the trajectory or position of the flying object.
- a terminal according to Clause 1 or Clause 2. The control unit assumes that the information indicating the trajectory or position of the flying object is valid within a given period of time; The terminal according to any one of items 1 to 3.
- (Section 5) a receiving unit that receives information indicating the trajectory or position of a flying object that relays communication with a terminal from the flying object; a transmitting unit that transmits the information indicating the trajectory or position of the flying object to the terminal; base station. (Section 6) receiving information indicative of the trajectory or position of an air vehicle that relays communications to and from a base station; performing time or frequency synchronization in communication with the base station relaying the flying object based on the information indicating the trajectory or position of the flying object; Communication method.
- any of the above configurations provides a technology that allows satellite orbit-based mechanisms to be applied to air vehicle-based non-terrestrial networks.
- appropriate information can be designated as information indicating the trajectory or position of the flying object.
- self-estimation of the timing advance of the service link or correction of the Doppler shift can be performed based on the information indicating the trajectory or position of the vehicle.
- the period of validity of information indicating the trajectory or position of the flying object can be set in advance.
- each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't
- a functional block (component) that performs transmission is called a transmitting unit or transmitter.
- the implementation method is not particularly limited.
- the base station 10, the terminal 20, etc. may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 14 is a diagram illustrating an example of hardware configurations of the base station 10 and the terminal 20 according to an embodiment of the present disclosure.
- the base station 10 and terminal 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. good too.
- the term "apparatus” can be read as a circuit, device, unit, or the like.
- the hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
- Each function of the base station 10 and the terminal 20 is performed by the processor 1001 performing calculations and controlling communication by the communication device 1004 by loading predetermined software (programs) onto hardware such as the processor 1001 and the storage device 1002. or by controlling at least one of data reading and writing in the storage device 1002 and the auxiliary storage device 1003 .
- the processor 1001 for example, operates an operating system and controls the entire computer.
- the processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
- CPU central processing unit
- the control unit 140 , the control unit 240 and the like described above may be implemented by the processor 1001 .
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the program a program that causes a computer to execute at least part of the operations described in the above embodiments is used.
- control unit 140 of base station 10 shown in FIG. 12 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 .
- the control unit 240 of the terminal 20 shown in FIG. 13 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001 .
- FIG. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.
- the storage device 1002 is a computer-readable recording medium, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be configured.
- the storage device 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the storage device 1002 can store executable programs (program code), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
- the storage medium described above may be, for example, a database, server, or other suitable medium including at least one of storage device 1002 and secondary storage device 1003 .
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD).
- FDD frequency division duplex
- TDD time division duplex
- the transceiver may be physically or logically separate implementations for the transmitter and receiver.
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (for example, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- Each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
- the base station 10 and the terminal 20 include hardware such as microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), and FPGAs (Field Programmable Gate Arrays). , and part or all of each functional block may be implemented by the hardware.
- processor 1001 may be implemented using at least one of these pieces of hardware.
- a vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029. , an information service unit 2012 and a communication module 2013 .
- a communication device mounted on vehicle 2001 may be applied to communication module 2013, for example.
- the driving unit 2002 is configured by, for example, an engine, a motor, or a hybrid of the engine and the motor.
- the steering unit 2003 includes at least a steering wheel (also referred to as steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
- the electronic control unit 2010 is composed of a microprocessor 2031 , a memory (ROM, RAM) 2032 and a communication port (IO port) 2033 . Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010 .
- the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
- the signals from the various sensors 2021 to 2029 include the current signal from the current sensor 2021 that senses the current of the motor, the rotation speed signal of the front and rear wheels acquired by the rotation speed sensor 2022, and the front wheel acquired by the air pressure sensor 2023. and rear wheel air pressure signal, vehicle speed signal obtained by vehicle speed sensor 2024, acceleration signal obtained by acceleration sensor 2025, accelerator pedal depression amount signal obtained by accelerator pedal sensor 2029, brake pedal sensor 2026 obtained by There are a brake pedal depression amount signal, a shift lever operation signal acquired by the shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028, and the like.
- the information service unit 2012 includes various devices such as car navigation systems, audio systems, speakers, televisions, and radios for providing various types of information such as driving information, traffic information, and entertainment information, and one or more devices for controlling these devices. ECU.
- the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide passengers of the vehicle 2001 with various multimedia information and multimedia services.
- Driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), camera, positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, automatic driving vehicle (AV) map, etc. ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, AI processors, etc., to prevent accidents and reduce the driver's driving load. and one or more ECUs for controlling these devices.
- the driving support system unit 2030 transmits and receives various information via the communication module 2013, and realizes a driving support function or an automatic driving function.
- the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via communication ports.
- the communication module 2013 communicates with the vehicle 2001 through the communication port 2033, the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axle 2009, the electronic Data is transmitted and received between the microprocessor 2031 and memory (ROM, RAM) 2032 in the control unit 2010 and the sensors 2021-29.
- the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from an external device via wireless communication.
- Communication module 2013 may be internal or external to electronic control unit 2010 .
- the external device may be, for example, a base station, a mobile station, or the like.
- the communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication.
- the communication module 2013 receives the rotation speed signal of the front and rear wheels obtained by the rotation speed sensor 2022, the air pressure signal of the front and rear wheels obtained by the air pressure sensor 2023, and the vehicle speed sensor. 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, and a shift lever.
- a shift lever operation signal obtained by the sensor 2027 and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028 are also transmitted to an external device via wireless communication.
- the communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices, and displays it on the information service unit 2012 provided in the vehicle 2001 .
- Communication module 2013 also stores various information received from external devices in memory 2032 available to microprocessor 2031 .
- the microprocessor 2031 controls the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, and the axle 2009 provided in the vehicle 2001.
- sensors 2021 to 2029 and the like may be controlled.
- the operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the base station 10 and the terminal 20 have been described using functional block diagrams for convenience of explanation of processing, such devices may be implemented in hardware, software, or a combination thereof.
- the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are stored in random access memory (RAM), flash memory, read-only memory, respectively. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other appropriate storage medium.
- notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods.
- notification of information includes physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
- RRC signaling may also be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.
- Each aspect/embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system) system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer, a decimal number)), FRA (Future Radio Access), NR (new Radio), New radio access ( NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802 .16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems, and any extensions, modifications, creations, and provisions based on these systems. It may be applied to
- a specific operation performed by the base station 10 in this specification may be performed by its upper node in some cases.
- various operations performed for communication with terminal 20 may be performed by base station 10 and other network nodes other than base station 10 (eg, but not limited to MME or S-GW).
- base station 10 e.g, but not limited to MME or S-GW
- the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW).
- Information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.
- Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input/output information and the like can be overwritten, updated, or appended. The output information and the like may be deleted. The entered information and the like may be transmitted to another device.
- the determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), may be performed by a boolean value (Boolean: true or false), or may be performed by comparing numerical values (e.g. , comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) to website, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
- the channel and/or symbols may be signaling.
- a signal may also be a message.
- a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
- system and “network” used in this disclosure are used interchangeably.
- information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information.
- radio resources may be indexed.
- base station BS
- radio base station base station
- base station fixed station
- NodeB nodeB
- eNodeB eNodeB
- gNodeB gNodeB
- a base station can accommodate one or more (eg, three) cells.
- the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being associated with a base station subsystem (e.g., an indoor small base station (RRH:
- RRH indoor small base station
- the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems serving communication services in this coverage.
- MS Mobile Station
- UE User Equipment
- a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
- the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a user terminal.
- communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.)
- the terminal 20 may have the functions of the base station 10 described above.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be read as side channels.
- user terminals in the present disclosure may be read as base stations.
- the base station may have the functions that the above-described user terminal has.
- determining and “determining” used in this disclosure may encompass a wide variety of actions.
- “Judgement” and “determination” are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as “judged” or “determined”, and the like.
- "judgment” and “determination” are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment” or “decision” has been made.
- judgment and “decision” are considered to be “judgment” and “decision” by resolving, selecting, choosing, establishing, comparing, etc. can contain.
- judgment and “decision” may include considering that some action is “judgment” and “decision”.
- judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
- connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
- two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.
- the reference signal can also be abbreviated as RS (Reference Signal), and may also be called Pilot depending on the applicable standard.
- RS Reference Signal
- any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements can be employed or that the first element must precede the second element in any way.
- a radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of numerology.
- a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
- SCS subcarrier spacing
- TTI transmission time interval
- transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
- a slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
- a slot may be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.
- one subframe may be called a Transmission Time Interval (TTI)
- TTI Transmission Time Interval
- TTI Transmission Time Interval
- TTI Transmission Time Interval
- one slot or one minislot may be called a TTI.
- TTI Transmission Time Interval
- at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each terminal 20
- TTI is not limited to this.
- a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
- a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
- the short TTI e.g., shortened TTI, etc.
- a TTI having the above TTI length may be read instead.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
- the number of subcarriers included in an RB may be determined based on numerology.
- the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long.
- One TTI, one subframe, etc. may each consist of one or more resource blocks.
- One or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. may be called.
- PRBs physical resource blocks
- SCGs sub-carrier groups
- REGs resource element groups
- PRB pairs RB pairs, etc. may be called.
- a resource block may be composed of one or more resource elements (RE: Resource Element).
- RE Resource Element
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a bandwidth part (which may also be called a bandwidth part) may represent a subset of contiguous common resource blocks (RBs) for a certain numerology on a certain carrier.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be configured for terminal 20 within one carrier.
- At least one of the configured BWPs may be active, and terminal 20 may not expect to transmit or receive a given signal/channel outside the active BWP.
- terminal 20 may not expect to transmit or receive a given signal/channel outside the active BWP.
- “cell”, “carrier”, etc. in the present disclosure may be read as "BWP”.
- radio frames, subframes, slots, minislots and symbols described above are only examples.
- the number of subframes contained in a radio frame the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.
- CP cyclic prefix
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
- notification of predetermined information is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.
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Abstract
Description
本実施の形態では、上述した衛星軌道データに基づくメカニズムをHAPS等の飛行体ベースの非地上型ネットワークに適用する例について説明する。以下では、HAPSを例として説明するが、本実施の形態に係る技術は、他の非地上型ネットワークにも適用可能である。
実施例1では、飛行体の軌道または位置を示す情報の定義について説明する。飛行体は、非地上型ネットワークにおいて基地局と端末との間の通信を中継する装置である。
・飛行体/軌道の高度
・飛行体/軌道の高度の変化率
・飛行体の位置
・軌道の半径または直径(軌道が円に近似される場合)
・軌道の半主軸および離心率(軌道が楕円に近似される場合)
・軌道の形状(円、楕円または8の字など)
・周期
・軌道の基準点
・基準時における飛行体の基準位置
・速度および/または速度の変化率
・楕円の準主軸の長さα[m]
・偏心率e
・起点時刻t0における平均近点角M[rad]
・近点における偏角ω[rad]
・昇交点黄経Ω[rad]
・傾斜角i[rad]
・軌道の基準位置X
・飛行体10Eの高度または高度の変化率
実施例2では、飛行体の軌道または位置を示す情報がネットワークを介して端末に送信される例について説明する。
実施例3では、端末が時間または周波数同期のために情報を使用する例について説明する。
実施例4では、端末が飛行体の軌道または位置を示す情報を、与えられた期間の範囲内において有効であると想定する例について説明する。
次に、これまでに説明した処理及び動作を実行する基地局10及び端末20の機能構成例を説明する。基地局10及び端末20は上述した実施例を実行する機能を含む。ただし、基地局10及び端末20はそれぞれ、実施例のうちのいずれかの提案の機能のみを備えることとしてもよい。
図12は、基地局10の機能構成の一例を示す図である。図12に示されるように、基地局10は、送信部110と、受信部120と、設定部130と、制御部140とを有する。図12に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。送信部110と受信部120とを通信部と呼んでもよい。
図13は、端末20の機能構成の一例を示す図である。図13に示されるように、端末20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図13に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。送信部210と受信部220とを通信部と呼んでもよい。
(第1項)
基地局との間の通信を中継する飛行体の軌道または位置を示す情報を受信する受信部と、
前記飛行体の軌道または位置を示す前記情報に基づいて、前記飛行体を中継する前記基地局との通信における時間または周波数の同期を行う制御部と、を備える、
端末。
(第2項)
前記飛行体の軌道または位置を示す前記情報は、前記飛行体または軌道の高度、前記飛行体または軌道の高度の変化率、前記飛行体の位置、前記軌道の半径または直径、前記軌道の半主軸および離心率、前記軌道の形状、前記軌道における周期、前記軌道の基準点、基準時における前記飛行体の基準位置、前記飛行体の速度、前記飛行体の速度の変化率の少なくともいずれかを含み、
前記受信部は、前記飛行体の軌道または位置を示す前記情報のうち、どの情報が送信されるかが明示的に示される情報を受信する、
第1項に記載の端末。
(第3項)
前記制御部は、前記飛行体の軌道または位置を示す情報に基づいて、サービスリンクのタイミングアドバンスの値の算出、もしくはドップラーシフトの補正を実行する、
第1項または第2項に記載の端末。
(第4項)
前記制御部は、前記飛行体の軌道または位置を示す前記情報を、与えられた期間の範囲内において有効であると想定する、
第1項から第3項のいずれか1項に記載の端末。
(第5項)
端末との間の通信を中継する飛行体の軌道または位置を示す情報を、前記飛行体から受信する受信部と、
前記飛行体の軌道または位置を示す前記情報を、前記端末に送信する送信部と、を備える、
基地局。
(第6項)
基地局との間の通信を中継する飛行体の軌道または位置を示す情報を受信するステップと、
前記飛行体の軌道または位置を示す前記情報に基づいて、前記飛行体を中継する前記基地局との通信における時間または周波数の同期を行うステップと、を端末が実行する、
通信方法。
上記実施形態の説明に用いたブロック図(図12及び図13)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局10及び端末20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って基地局10が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従って端末20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
10A 衛星
10B ゲートウェイ
10C 地上基地局
10D CN
10E 飛行体
110 送信部
120 受信部
130 設定部
140 制御部
20 端末
210 送信部
220 受信部
230 設定部
240 制御部
30 コアネットワーク
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
2001 車両
2002 駆動部
2003 操舵部
2004 アクセルペダル
2005 ブレーキペダル
2006 シフトレバー
2007 前輪
2008 後輪
2009 車軸
2010 電子制御部
2012 情報サービス部
2013 通信モジュール
2021 電流センサ
2022 回転数センサ
2023 空気圧センサ
2024 車速センサ
2025 加速度センサ
2026 ブレーキペダルセンサ
2027 シフトレバーセンサ
2028 物体検出センサ
2029 アクセルペダルセンサ
2030 運転支援システム部
2031 マイクロプロセッサ
2032 メモリ(ROM,RAM)
2033 通信ポート(IOポート)
Claims (6)
- 基地局との間の通信を中継する飛行体の軌道または位置を示す情報を受信する受信部と、
前記飛行体の軌道または位置を示す前記情報に基づいて、前記飛行体を中継する前記基地局との通信における時間または周波数の同期を行う制御部と、を備える、
端末。 - 前記飛行体の軌道または位置を示す前記情報は、前記飛行体または軌道の高度、前記飛行体または軌道の高度の変化率、前記飛行体の位置、前記軌道の半径または直径、前記軌道の半主軸および離心率、前記軌道の形状、前記軌道における周期、前記軌道の基準点、基準時における前記飛行体の基準位置、前記飛行体の速度、前記飛行体の速度の変化率の少なくともいずれかを含み、
前記受信部は、前記飛行体の軌道または位置を示す前記情報のうち、どの情報が送信されるかが明示的に示される情報を受信する、
請求項1に記載の端末。 - 前記制御部は、前記飛行体の軌道または位置を示す情報に基づいて、サービスリンクのタイミングアドバンスの値の算出、もしくはドップラーシフトの補正を実行する、
請求項1または2に記載の端末。 - 前記制御部は、前記飛行体の軌道または位置を示す前記情報を、与えられた期間の範囲内において有効であると想定する、
請求項1から3のいずれか1項に記載の端末。 - 端末との間の通信を中継する飛行体の軌道または位置を示す情報を、前記飛行体から受信する受信部と、
前記飛行体の軌道または位置を示す前記情報を、前記端末に送信する送信部と、を備える、
基地局。 - 基地局との間の通信を中継する飛行体の軌道または位置を示す情報を受信するステップと、
前記飛行体の軌道または位置を示す前記情報に基づいて、前記飛行体を中継する前記基地局との通信における時間または周波数の同期を行うステップと、を端末が実行する、
通信方法。
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Non-Patent Citations (4)
Title |
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3GPP TS 38.213, June 2021 (2021-06-01) |
3GPP TS 38.300, June 2021 (2021-06-01) |
ERICSSON: "On UL time and frequency synchronization enhancements for NTN", 3GPP DRAFT; R1-2100927, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210125 - 20210205, 19 January 2021 (2021-01-19), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051971266 * |
ERICSSON: "On UL time and frequency synchronization enhancements for NTN", 3GPP DRAFT; R1-2108240, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210816 - 20210827, 13 August 2021 (2021-08-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052042075 * |
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