WO2023073963A1 - Base station and communication method - Google Patents
Base station and communication method Download PDFInfo
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- WO2023073963A1 WO2023073963A1 PCT/JP2021/040150 JP2021040150W WO2023073963A1 WO 2023073963 A1 WO2023073963 A1 WO 2023073963A1 JP 2021040150 W JP2021040150 W JP 2021040150W WO 2023073963 A1 WO2023073963 A1 WO 2023073963A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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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
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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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 a base station and communication method in a wireless communication system.
- NR New Radio
- NR New Radio
- 5G various radio technologies and network architectures are being studied in order to meet the requirements of realizing a throughput of 10 Gbps or more and keeping the delay in the radio section to 1 ms or less (for example, Non-Patent Document 1).
- Next-generation communications are expected to use high-frequency bands. Improvements in communication quality are required from the viewpoint of reducing the number of scatterers, reducing shadowing effects, increasing distance attenuation, etc., due to the characteristics of the high frequency band. It is assumed that beam control and environment etc. to ensure communication quality will be required.
- Non-Patent Document 2 For example, in high frequency bands, there is a problem that dead zones are likely to occur due to the strong straightness of radio waves. Therefore, attempts have been made to improve communication quality in a multipath environment using passive repeaters, active reflectors (RIS: Reconfigurable Intelligent Surface), and smart repeaters that receive, amplify, and re-radiate signals. (For example, Non-Patent Document 2).
- a radio relay device such as a reflector or a smart repeater that reflects or transmits radio waves from a radio wave source such as a base station to a radio wave receiving destination such as a terminal and relays the radio waves
- the signal is transmitted by the radio relay device.
- An initial access method that assumes relaying is required.
- the present invention has been made in view of the above points, and aims to improve the reliability of initial access via a wireless relay device in a wireless communication system.
- the disclosed technique has a transmission unit that transmits a plurality of signals associated with an index and that includes a synchronization signal and notification information, and a control unit that controls operations related to transmission of the signals, and the control unit includes: A base station is provided for adding said signal associated with said index if a radio repeater is present.
- FIG. 1 is a diagram for explaining a radio communication system according to an embodiment of the present invention
- FIG. It is a figure showing an example of functional composition of base station 10 in an embodiment of the invention.
- 2 is a diagram showing an example of the functional configuration of terminal 20 according to the embodiment of the present invention;
- FIG. It is a figure showing an example of functional composition of radio relay equipment 30 in an embodiment of the invention.
- FIG. 4 is a diagram showing an example of communication in a high frequency band; It is a figure which shows the example of the reflection type wireless relay apparatus 30 in embodiment of this invention. It is a figure which shows the example of the transparent
- FIG. 2 is a diagram showing an example of hardware configuration of base station 10 or terminal 20 according to an embodiment of the present invention
- FIG. It is a figure showing an example of composition of vehicles 2001 in an embodiment of the invention.
- LTE Long Term Evolution
- LTE-Advanced LTE-Advanced and subsequent systems (eg, NR) unless otherwise specified.
- 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
- "configuring" wireless parameters and the like may mean that predetermined values are preset (Pre-configure), and the base station 10 or A wireless parameter notified from the terminal 20 may be set.
- FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.
- a wireless communication system according to an embodiment of the present invention includes a base station 10 and terminals 20, as shown in FIG.
- a plurality of base stations 10 and terminals 20 may be provided.
- the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
- Physical resources of radio signals are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. good too.
- a TTI Transmission Time Interval
- a TTI Transmission Time Interval
- TTI Transmission Time Interval
- the base station 10 can perform carrier aggregation in which multiple cells (multiple CCs (component carriers)) are bundled and communicated with the terminal 20 .
- multiple CCs component carriers
- carrier aggregation one primary cell (PCell, Primary Cell) and one or more secondary cells (SCell, Secondary Cell) are used.
- the base station 10 transmits a synchronization signal, system information, etc. to the terminal 20.
- Synchronization signals are, for example, NR-PSS and NR-SSS.
- System information is transmitted, for example, on NR-PBCH or PDSCH, 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).
- control channels such as PUCCH and PDCCH
- data what is transmitted on a shared channel such as PUSCH and PDSCH is called data.
- 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. As shown in FIG. 1 , the terminal 20 receives control signals or data from the base station 10 on the DL and transmits control signals or data to the base station 10 on the UL, thereby performing various functions provided by the wireless communication system. Use communication services. Note that the terminal 20 may be called UE, and the base station 10 may be called gNB.
- the terminal 20 can perform carrier aggregation in which multiple cells (multiple CCs) are bundled and communicated with the base station 10 .
- Multiple CCs multiple CCs
- One primary cell and one or more secondary cells are used in carrier aggregation.
- a PUCCH-SCell with PUCCH may also be used.
- the base station 10 is, for example, a radio base station operated in 5G or 6G, and forms a cell.
- a cell is a cell with a relatively large size and is called a macro cell.
- the base stations 10A to 10D are base stations operated by 5G or 6G.
- the base stations 10A-10D respectively form cells CA-cell D, which are smaller in size than the macrocell.
- Cell A-cell D may be called a small cell, a macro cell, or the like. As shown in FIG. 1, cells A-cell D may be formed to be included in a macrocell.
- a macrocell may generally be interpreted as a communicable area with a radius of several hundred meters to several tens of kilometers covered by one base station. Also, a small cell may be interpreted as a generic term for cells that have low transmission power and cover a smaller area than a macro cell.
- the base station 10 and the base stations 0A to 10D may be denoted as gNodeB (gNB) or BS (Base Station).
- the terminal 20 may be denoted as UE, MS, or the like.
- the specific configuration of the wireless communication system including the numbers and types of base stations and terminals, is not limited to the example shown in FIG.
- the wireless communication system is not necessarily limited to a wireless communication system according to 5G or 6G.
- the wireless communication system may be a 6G next-generation wireless communication system or a wireless communication system according to LTE.
- the base station 10 and the base stations 10A to 10D perform wireless communication with the terminal 20 according to 5G or 6G.
- Base station 10 and base station 10A-base station 10D and terminal 20 control radio signals transmitted from a plurality of antenna elements to generate beams with higher directivity (Massive MIMO), a plurality of Carrier aggregation (CA) that bundles component carriers (CC), dual connectivity (DC) that simultaneously communicates between terminal 20 and two NG-RAN nodes, and radio between wireless communication nodes such as gNB It may correspond to IAB (Integrated Access and Backhaul) in which the backhaul and radio access to the terminal 20 are integrated, or the like.
- IAB Integrated Access and Backhaul
- the radio communication system can support high frequency bands higher than the following frequency ranges (Frequency Range, FR) specified in 3GPP Release 15.
- FR1 may correspond to 410 MHz-7.125 GHz
- FR2 may correspond to 24.25 GHz-52.6 GHz.
- the wireless communication system may support frequency bands above 52.6 GHz and up to 114.25 GHz. This frequency band may be referred to as the millimeter wave band.
- the base station 10 supporting massive MIMO can transmit beams.
- Massive MIMO generally means MIMO communication using an antenna having 100 or more antenna elements, and enables faster wireless communication than before due to the effect of multiplexing multiple streams.
- Advanced beamforming is also possible.
- the beam width can be dynamically changed according to the frequency band to be used, the state of the terminal 20, or the like. Also, it is possible to increase the received signal power by beam forming gain by using a narrow beam. Furthermore, effects such as reduction of interference and effective use of radio resources are expected.
- the wireless communication system may include the wireless relay device 30 .
- the radio repeater 30 may be a reflector (RIS), a phase control reflector, a passive repeater, an IRS (Intelligent Reflecting Surface), or the like.
- RIS Reconfigurable Intelligent Surface
- Specific examples of reflectors may be those called metamaterial reflectors, dynamic metasurfaces, metasurface lenses, and the like (for example, Non-Patent Document 2).
- the radio relay device 30 relays radio signals transmitted from the base station 10A, for example.
- “relay” may refer to at least one of “reflection”, “transmission”, “concentration (concentrating radio waves to approximately one point)", and “diffraction”.
- the terminal 20 can receive the radio signal relayed by the radio relay device 30 .
- the radio relay device 30 may relay a radio signal transmitted from the terminal 20 or may relay a radio signal transmitted from the base station 10 .
- the radio relay device 30 can change the phase of the radio signal relayed to the terminal 20 .
- the radio relay device 30 may be called a variable phase reflector.
- the radio relay device 30 may have a function of changing the phase of the radio signal and relaying it, but the present invention is not limited to this.
- the wireless relay device 30 may be called a repeater, a relay device, a reflect array, an IRS, a transmit array, or the like.
- the wireless relay device 30 such as RIS may be called a batteryless device, a metamaterial functional device, an intelligent reflecting surface, a smart repeater, or the like.
- a wireless relay device 30 such as a RIS or smart repeater may be defined as having the functions shown in 1)-5) below.
- the SSB may be a signal including a synchronization signal and broadcast information.
- the signals may have a function of transmitting signals to the base station 10 .
- the signals may be PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals, etc., which are UL signals. It may have a function of transmitting information related to the metamaterial function. In addition, it may have a reception function for receiving the signal from the terminal 20 .
- It may have a frame synchronization function with the base station 10 .
- a frame synchronization function with the terminal 20 may be provided.
- the reflection function includes a function related to phase change, a function related to beam control (for example, TCI (Transmission Configuration Indication)-state, a function related to QCL (Quasi Co Location) control, beam selection application, spatial filter / selective application of precoding weights).
- the power modification function may be power amplification.
- receiving and transmitting and “relaying" in the wireless relay device 30 means that although function A below is performed, transmission is performed without performing function B below.
- Function A Apply phase shifters and compensation circuits.
- Function B No frequency conversion is involved.
- the amplitude may be amplified when the phase is changed in the wireless relay device 30 such as the RIS.
- “relay” in the wireless relay device 30 such as RIS means transmitting the received signal as it is without performing layer 2 or layer 3 level processing, or transmitting the signal received at the physical layer level as it is. Alternatively, it may mean transmitting the received signal as it is without interpreting the signal (at that time, phase change, amplitude amplification, etc. may be performed).
- the base station 10, the terminal 20, and the radio relay device 30 include functions for executing embodiments described later. However, each of the base station 10, the terminal 20 and the radio relay device 30 may have only one of the functions of the embodiments.
- FIG. 2 is a diagram showing an example of the functional configuration of the base station 10.
- the base station 10 has a transmitter 110 , a receiver 120 , a setter 130 and a controller 140 .
- the functional configuration shown in FIG. 2 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 setting information and the like to be described in the embodiments.
- 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, for example, resource allocation, overall control of the base station 10, and the like. 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. 3 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. 3 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 setting information and the like described in the embodiments.
- 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 controls the terminal 20 as a whole. 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.
- FIG. 4 is a diagram showing an example of the functional configuration of the wireless relay device 30 according to the embodiment of the invention.
- the radio relay device 30 has a transmitting section 310 , a receiving section 320 , a control section 330 , a variable section 340 and an antenna section 350 .
- the functional division and the names of the functional units may be arbitrary.
- the transmitting unit 310 and the receiving unit 320 may be called a communication unit.
- the antenna section 350 includes at least one antenna connected to the variable section 340 .
- the antenna section 350 may be arranged as an array antenna.
- the antenna section 350 may be particularly called a relay antenna.
- the variable section 340 and the antenna section 350 may be called a relay section.
- variable section 340 is connected to the antenna section 350 and can change the phase, load, amplitude, and the like.
- variable section 340 may be a variable phase shifter, phase shifter, amplifier, or the like. For example, by changing the phase of the radio wave that reaches the relay antenna from the radio wave source, the direction or beam of the radio wave can be changed.
- the control unit 330 is control means for controlling the variable unit 340 .
- the control unit 330 functions as a control unit that controls the relay state when relaying radio waves from the base station 10 or the terminal 20 without signal interpretation.
- the control unit 330 may change the relay state based on control information received from the base station 10 or the terminal 20 via the communication unit. to change the relay state. For example, based on control information such as SSB, the control unit 330 may select (directions of) appropriate reception beams and transmission beams and control the variable unit 340 .
- control section 330 may select an appropriate combination of reception direction and transmission direction based on criteria such as the highest reception quality or reception power from the reception state, and control variable section 340 .
- the control unit 330 includes, for example, information on the propagation path between the terminal 20 or the base station 10A and the antenna unit 350 (including information estimated from the reception state and control information. ), the variable section 340 can be controlled.
- the control unit 330 uses a known method such as an active repeater or RIS to change the phase of the radio wave received from the base station 10A without using the transmission power, so that the radio wave receiving destination (in this case, the terminal 20) can be relayed in a specific direction.
- the control unit 330 controls the phase of the radio signal for relaying to the terminal 20 or base station 10A.
- the wireless relay device 30 controls (changes) only the phase of the wireless signal (radio wave) by the control unit 330, and relays the wireless signal without power supply without amplifying the power of the wireless signal to be relayed. You may
- control unit 330 may acquire information according to the reception state. Also, the receiving unit 320 may acquire control information from the base station 10A or the terminal 20 . For example, the receiving unit 320 may receive various signals such as SSB (including various signals exemplified in the functions described above) transmitted from the base station 10A or the terminal 20 as control information.
- SSB including various signals exemplified in the functions described above
- control unit 330 controls the propagation path between the radio wave source (eg, the base station 10A or the terminal 20) and the antenna unit 350 based on the reception state (eg, change in received power) when the variable unit 340 is controlled.
- Information H PT and H RP ) may be estimated.
- the propagation path information (propagation channel information) on each propagation path is specifically information such as amplitude or phase.
- the control unit 330 based on the same principle as I/Q (In-phase/Quadrature) detection, changes the received power when switching the phase of the variable unit 340 of the array-shaped antenna unit 350 to orthogonal.
- the propagation path information of the antenna unit 350 may be estimated by using the
- FIG. 5 is a diagram showing an operation example of the wireless relay device 30 according to the embodiment of the present invention.
- the radio relay device 30 is interposed between the base station 10A (other base stations 10 or the like) and the terminal 20, and is interposed between the base station 10A and the terminal 20. relays (reflects, transmits, aggregates, diffracts, etc.) radio signals transmitted and received in
- the base station 10A and the terminal 20 directly transmit and receive wireless signals without going through the wireless relay device 30 when the wireless quality is good.
- the radio relay device 30 relays radio signals transmitted and received between the base station 10A and the terminal 20. do.
- the radio relay apparatus 30 based on the change in the received power during control of the variable unit 340 such as a variable phase shifter, transmits the propagation path information between the radio wave source such as the base station 10A or the terminal 20 and the relay antenna.
- the radio signal is relayed to the radio wave receiving destination such as the terminal 20 .
- the radio relay apparatus 30 is not limited to estimating the channel information H PT and H RT , and controls the variable section 340 such as a variable phase shifter based on the control information received from the base station 10A or the terminal 20. Accordingly, the radio signal may be relayed toward the radio wave reception destination such as the base station 10A or the terminal 20.
- a propagation path or a propagation channel is an individual communication path of wireless communication, and here is a communication path between each transmitting/receiving antenna (base station antenna, terminal antenna, etc. in the figure).
- the radio relay apparatus 30 includes an antenna section 350 having a small multi-element antenna compatible with Massive MIMO, and a variable phase shifter or phase shifter that changes the phase of a radio signal, substantially a radio wave, to a specific phase. and using the variable unit 340, the phase of the radio wave relayed to the terminal 20 or the base station 10A is controlled.
- FIG. 6 is a diagram showing an example of communication in a high frequency band.
- a dead zone is likely to occur due to the strong rectilinear propagation of radio waves.
- the line between the base station 10A and the terminal 20 is visible, wireless communication between the base station 10A and the terminal 20 is not affected even when the high frequency band is used.
- the radio quality is greatly degraded. That is, when the terminal 20 moves to a dead zone blocked by a shield, communication may be interrupted.
- the passive type has the advantage of not requiring control information, but cannot follow moving objects or environmental changes.
- the active type requires control information and has the disadvantage of increasing overhead. Fluctuations and the like can also be followed.
- FB feedback
- propagation path information norms propagation path information norms.
- the variable radio wave propagation control device searches for the optimum condition by having the terminal 20 or the like feed back the communication state when the load (phase) state is changed at random.
- the propagation path information standard the load state is determined based on the propagation path information between the base station and the radio wave propagation control device, and optimum radio wave propagation control becomes possible. Either type is applicable in the embodiment of the present invention.
- Non-Patent Document 2 As relay methods, there are types such as reflection, transmission, diffraction, and consolidation. See Non-Patent Document 2, etc.).
- FIG. 7 is a diagram showing an example of the reflective wireless relay device 30 according to the embodiment of the present invention.
- An example of the system configuration of the reflective radio relay device 30 will be described with reference to FIG.
- FIG. 7 is a diagram showing the relationship among the transmitting antenna Tx of the base station 10A and the like, the relay antenna Sx of the transmissive radio relay device 30, and the receiving antenna Rx of the terminal 20 and the like.
- MIMO is taken as an example, and there are a plurality of propagation paths between Tx-Sx and a plurality of propagation paths between Sx-Rx.
- the device 30 relays radio waves by controlling a variable section 340 having a variable phase shifter or the like of the relay antenna Sx.
- the arrayed relay antennas are arranged facing the same direction. Thereby, the propagation path of the relay antenna can be estimated based on the reception state observed when the phase conditions of the relay antenna are changed in a plurality of ways.
- FIG. 8 is a diagram showing an example of the transparent wireless relay device 30 according to the embodiment of the present invention.
- An example of the system configuration of the transparent wireless relay device 30 will be described with reference to FIG.
- FIG. 8 is a diagram showing the relationship among the transmitting antenna Tx of the base station 10A and the like, the relay antenna Sx of the transmissive radio relay device 30, and the receiving antenna Rx of the terminal 20 and the like.
- MIMO is taken as an example, and there are a plurality of propagation paths between Tx and Sx and a plurality of propagation paths between Sx and Rx.
- the relay device 30 relays radio waves arriving from one side to the other side via a variable section 340 such as a variable phase shifter of the relay antenna Sx.
- a variable section 340 such as a variable phase shifter of the relay antenna Sx.
- the reference antenna on the left side of the figure and the relay antenna on the right side of the figure are paired and directed in opposite directions so that radio waves arriving from one side can be relayed to the other side. are placed.
- a power detector or the like may be configured to detect the power reaching the relay antenna, and the reception state may be measured. Further, the propagation path of the relay antenna can be estimated based on the received signals observed when the phase conditions of the relay antenna are varied.
- future networks such as 6G will require even higher quality than 5G.
- ultra-high speed on the order of tera bps, high reliability and low delay on the level of optical communication, etc. are required.
- designs considering ultra-coverage extension, ultra-long distance communication, ultra-reliable communication, virtual cells, flexible networks, mesh networks, enhancement of sidelinks, RIS or smart repeaters are required.
- the RIS reflects or transmits a beam transmitted from the base station 10 or the terminal 20 in a predetermined direction and delivers it to the terminal 20 or the base station 10.
- a passive RIS is a device that does not change the control of the reflection angle or beam width according to the position of the mobile station, and while control information is unnecessary, precise beam control is difficult.
- the active RIS is a device that changes the control of the reflection angle, beam width, etc. according to the position of the mobile station, and while it is capable of precise beam control, it requires control information, so the overhead increases. RIS allows more transmission points for communication.
- RIS may be the names shown in 1) to 4) below, but are not limited to these.
- the RIS may be any device that has a predetermined function, and the predetermined function may be, for example, at least one of 1) and 2) shown below.
- UE function A function of receiving signals transmitted from the base station 10 (for example, DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, RIS dedicated signals). Information related to the following 2) metamaterial function may be received by the receiving function.
- Functions for transmitting signals to the base station 10 eg, UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals.
- Information related to the following 2) metamaterial function may be transmitted by the transmission function.
- the signal may be reflected by changing the phase for each of the plurality of reflecting elements of the RIS, or the common phase may be changed by the plurality of reflecting elements to reflect the signal.
- Functions related to beam control eg, TCI-state, functions related to QCL control, selective application of beams, selective application of spatial filters/precoding weights).
- power modification function eg, power amplification of the signal transmitted from the base station 10 or the terminal 20; A different power change may be performed for each reflecting element of the RIS, or a common power change may be performed for a plurality of reflecting elements.
- Receiveive and transmit in RIS may mean reflecting radio waves/signals.
- base station and “terminal” are used hereinafter, they are not limited to these terms and may be replaced by communication devices.
- the RIS may be replaced by a smart repeater, repeater, or the like.
- the RIS may operate under the assumptions shown in 1)-6) below. 1) The RIS is configured by the network operator 2) The RIS is fixed and does not move 3) The RIS relays signals from only one base station 4) Capable of receiving and transmitting control signals 5) Half-duplex 6) A single RIS environment that operates on
- RIS, smart repeaters, etc. can be considered for the purpose of flexible and low-cost expansion of the communication area of the wireless communication network.
- a significant difference between RIS or smart repeaters and IAB nodes is that IAB nodes perform baseband signal processing while RIS or smart repeaters do not.
- a connection may be established and configuration information may be predefined between the base station 10 and the RIS or smart repeater in order to control the transmission direction, transmission beam, etc. of the RIS or smart repeater.
- the terminal 20 performs initial access using a signal via the wireless relay device 30 such as a RIS or smart repeater
- the wireless relay device 30 such as a RIS or smart repeater
- the SSB index may be extended. Assuming that the RIS or smart repeater is installed or not installed in the cell, the SSB index may be extended, or the base station 10 may notify the RIS or smart repeater of information related to the SSB index. good.
- the RIS or smart repeater may be time-synchronized with the base station 10 in order to match the transmission pattern, reflection pattern, beam switching timing, etc. with the base station 10 .
- RIS or smart repeater may take into consideration the transmission timing of the terminal 20, for example, to advance the beam switching timing of the UL with respect to the DL, so that the UL switching time may be synchronized.
- FIG. 9 is a diagram for explaining an example of signals through the wireless relay device according to the embodiment of the present invention.
- the base station 10 transmits SSBs with SSB index X+1-SSB index Y for RIS or smart repeater in addition to SSBs with SSB index 0-SSB index X transmitted for existing cells.
- SSB indexes 0 to 3 may be assigned to the existing cells transmitted and received by the terminal 20A
- SSB indexes 4 to 7 may be assigned to the RIS or smart repeaters transmitted and received by the terminal 20B.
- RIS or smart repeaters may be installed arbitrarily. It may be installed, not installed, or the installation location may be changed after installation. For example, if no RIS or smart repeater is installed, the SSB index from 0 to X is sufficient, but if the RIS or smart repeater is installed, the SSB index from X+1 to Y is required.
- the SSB index set in the base station 10 may be set as shown in 1)-3) below.
- Index 0-X and index (X+1)-Y are always set.
- SSB indexes 0-X and (X+1)-Y are assigned to the base station 10, and the index (X+1)-Y may be determined whether transmission is possible depending on the presence or absence of a RIS or smart repeater.
- the base station 10 may start transmitting the beam of the SSB corresponding to index (X+1)-Y.
- the RIS or smart repeater may report at least one of its own transmission pattern, reflection pattern, and number of beams to the base station 10 as capabilities.
- the base station 10 may allocate SSBs based on RIS or smart repeater reporting numbers. For example, the base station 10 may additionally allocate SSBs by the number of RIS or smart repeater reports.
- the base station 10 may explicitly notify the RIS or smart repeater of the number of SSBs to be allocated and/or the SSB index. A smart repeater may be notified.
- the transmission pattern, reflection pattern and/or maximum number of beams (e.g., 4 or 8, etc.) of the RIS or smart repeater may be specified, set, or preset. .
- Indexes 0-X are always set, and indexes (X+1)-Y may be added based on the presence or absence of a RIS or smart repeater.
- the base station 10 is assigned SSB indices 0-X, and SSB indices (X+1)-Y may be added depending on the presence or absence of RIS or smart repeaters.
- a flag bit for enabling or disabling the SSB index (X+1)-Y may be provided in the PBCH or the like. If the flag bit indicates invalid, terminal 20 determines that the SSB index is 0-X, and if the flag bit indicates valid, terminal 20 determines that ⁇ is added to SSB index 0-X. You may The ⁇ may be specified in the specification or notified separately. For example, the ⁇ may be the SSB index (X+1)-Y.
- Index 0-X and index (X+1) may always be set.
- the RIS or smart repeater When the RIS or smart repeater can transmit a wide beam and a narrow beam at the same time, the RIS or smart repeater reflects or re-radiates the SSB corresponding to one SSB index (eg, X+1) with one wide beam. good too.
- a RIS or smart repeater may decode the PBCH and SIB to obtain the transmission period and timing of the SSB.
- a RIS or smart repeater may be assigned multiple CSI-RSs and reflect or re-radiate with multiple narrow beams.
- the RIS or smart repeater may report at least one of its own transmission pattern, reflection pattern, and beam number to the base station 10 as its capability.
- Base station 10 may allocate CSI-RS based on RIS or smart repeater reports.
- the base station 10 may notify the RIS or smart repeater of information (for example, time resource and/or frequency resource) regarding the CSI-RS to be allocated.
- the directions of the plurality of narrow beams may be included in the directions of the wide beams.
- the RIS or smart repeater transmits SSBs corresponding to one SSB index (eg, X+1) to multiple narrow beams. may be reflected or re-radiated by
- the SSB transmission period through the RIS or smart repeater is quadrupled.
- the RIS or smart repeater reflects the SSB corresponding to one SSB index (for example, X+1) with one wide beam. or may be re-radiated.
- the directions of the plurality of narrow beams may be included in the directions of the wide beams.
- the total number of beams for existing cells and beams for RIS or smart repeaters exceeds the maximum existing SSB index (8 for FR1 and 64 for FR2). If exceeded, the SSB index may be extended.
- one reserved bit of the PBCH MIB may be used to extend the SSB index.
- the SSB index may be extended using the RIS or the bit enabling the SSB index for smart repeaters. For example, if the bit indicating activation or deactivation is 0, the SSB index is assigned to the existing cell, the terminal 20 may search only the SSB index of the existing cell, and the bit indicating activation or deactivation is is 1, assign the extended SSB index to the RIS, and the terminal 20 may probe for the SSB index reflected or re-radiated at the RIS or smart repeater in addition to the existing cell SSB index.
- DL time synchronization between the base station 10 and the RIS or smart repeater may be performed as follows.
- the RIS or smart repeater may be time synchronized using an external source or using SSB to align the transmission pattern, reflection pattern and/or beam switching timing with the base station 10.
- the external source may be, for example, GNSS (Global Navigation Satellite System) or PTP (Precision Time Protocol).
- SSB Global Navigation Satellite System
- PTP Precision Time Protocol
- propagation delay differences between the base station 10 and the RIS or smart repeater may be allowed.
- the RIS or smart repeater is notified of information related to timing such as TA (Timing Advance), and may correct the propagation delay based on the information, or the base station 10 and Propagation delay may be estimated based on location information of the RIS or smart repeaters, or the like.
- TA Timing Advance
- UL time synchronization between the base station 10 and the RIS or smart repeater may be performed as follows.
- the RIS or smart repeater needs to achieve DL time synchronization with the base station 10, and at the same time, considering the transmission timing of the terminal 20, it is necessary to make the UL beam switching timing earlier than the DL beam switching timing. .
- the RIS or smart repeater recognizes the TDD pattern, and the UL slot advances the beam switching timing. good.
- the beam switching timing may be advanced at the timing of the flexible symbol of the special slot.
- the TDD pattern may be notified from the base station 10, set in advance, or defined in the specification.
- the timing for switching the UL pattern and/or beam may be timing according to the propagation delay by the RIS or smart repeater, or may be timing according to the TA set by the RIS or smart repeater from the base station 10.
- the base station 10 or the terminal 20 may notify the timing information.
- the timing may fluctuate according to the propagation path fluctuation between the base station 10 and the RIS or smart repeater.
- the timing of switching UL patterns and / or beams may be the timing of dynamic switching according to the TA set by the RIS or smart repeater from the base station 10, or the timing from the base station 10 or the terminal 20 Information may be notified.
- the base station 10 and terminal 20 can improve the reliability of initial access via RIS or smart repeaters.
- 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) responsible for transmission is called a transmitting unit or transmitter.
- the implementation method is not particularly limited.
- the base station 10, the terminal 20, the wireless relay device 30, and the like may function as computers that perform processing of the wireless communication method of the present disclosure.
- FIG. 10 is a diagram illustrating an example of hardware configurations of the base station 10, terminal 20, and radio relay device 30 according to an embodiment of the present disclosure.
- the base station 10, the terminal 20, and the wireless relay device 30 described above are physically computers 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. It may be configured as a device.
- the term "apparatus” can be read as a circuit, device, unit, or the like.
- the hardware configuration of the base station 10, the terminal 20, and the radio relay device 30 may be configured to include one or more of each device shown in the figure, or may be configured without some devices. good.
- Each function of the base station 10, the terminal 20, and the radio relay device 30 is performed by the processor 1001 by loading predetermined software (program) onto hardware such as the processor 1001 and the storage device 1002, and the communication device 1004. It is realized by controlling communication via the storage device 1002 and 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. 2 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 .
- FIG. Processor 1001 may be implemented by one or more chips.
- 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 disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, 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, the terminal 20 and the radio relay device 30 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable le Gate Array ), etc., and part or all of each functional block may be realized by the hardware.
- processor 1001 may be implemented using at least one of these pieces of hardware.
- the radio relay device 30 may have a variable phase shifter, a phase shifter, an amplifier, an antenna, an array antenna, etc., as hardware constituting the variable section 340 and the antenna section 350, if necessary.
- 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.
- a transmission unit that transmits a plurality of signals associated with an index including synchronization signals and notification information, and a control unit that controls operations related to transmission of the signals and said control unit is provided with a base station adding said signal associated with said index if a radio repeater is present.
- the base station 10 and terminal 20 can improve the reliability of initial access via RIS or smart repeaters. That is, in a wireless communication system, it is possible to improve the reliability of initial access via a wireless relay device.
- the controller may further include a receiver that receives reports from the wireless relay device, and the controller may add the signals associated with the index by the number of reports received by the receiver.
- the controller adds one of the signals associated with the index, applies a first beam to the added signal, and a plurality of second A plurality of CSI-RSs (Channel State Information-Reference Signals) to which two beams are respectively applied may be assigned.
- CSI-RSs Channel State Information-Reference Signals
- the control unit may perform downlink time synchronization with the radio relay apparatus, and determine beam switching timing to be applied to the signal.
- the base station 10 and terminal 20 can improve the reliability of initial access via the RIS or smart repeater.
- the control unit may synchronize the time related to the uplink with the radio relay apparatus, and advance the beam switching timing applied to the uplink with respect to the downlink.
- the base station 10 and terminal 20 can improve the reliability of initial access via the RIS or smart repeater.
- a transmission procedure for transmitting a plurality of signals associated with an index including synchronization signals and notification information, a control procedure for controlling operations related to the transmission of the signals, and a radio relay device is present, a communication method is provided in which a base station performs a step of transmitting said signal associated with said added index.
- the base station 10 and terminal 20 can improve the reliability of initial access via RIS or smart repeaters. That is, in a wireless communication system, it is possible to improve the reliability of initial access via a wireless relay device.
- 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 structure, 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.
- PDSCH (or PUSCH) transmitted in time units larger than minislots 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
- multiple consecutive subframes may be called a TTI
- one slot or 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 the 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.
- base station 110 transmitting unit 120 receiving unit 130 setting unit 140 control unit 20 terminal 210 transmitting unit 220 receiving unit 230 setting unit 240 control unit 30 radio relay device 310 transmitting unit 320 receiving unit 330 control unit 340 variable unit 350 antenna unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Driving unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication Module 2021 Current sensor 2022 Revolution sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving support system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 communication port (IO port)
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Abstract
This base station comprises: a transmission unit that transmits a plurality of signals associated with indexes including synchronization signals and broadcast information; and a control unit that controls operations related to the transmission of the signals, wherein the control unit adds the signals associated with the indexes, when a wireless relay device is present.
Description
本発明は、無線通信システムにおける基地局及び通信方法に関する。
The present invention relates to a base station and communication method in a wireless communication system.
3GPP(3rd Generation Partnership Project)では、システム容量の更なる大容量化、データ伝送速度の更なる高速化、無線区間における更なる低遅延化等を実現するために、5GあるいはNR(New Radio)と呼ばれる無線通信方式(以下、当該無線通信方式を「NR」という。)の検討が進んでいる。5Gでは、10Gbps以上のスループットを実現しつつ無線区間の遅延を1ms以下にするという要求条件を満たすために、様々な無線技術及びネットワークアーキテクチャの検討が行われている(例えば非特許文献1)。
In the 3GPP (3rd Generation Partnership Project), 5G or NR (New Radio) and NR (New Radio) are being used in order to further increase the system capacity, further increase the data transmission speed, and further reduce the delay in the wireless section. A radio communication system called "NR" (the radio communication system is hereinafter referred to as "NR") is under study. In 5G, various radio technologies and network architectures are being studied in order to meet the requirements of realizing a throughput of 10 Gbps or more and keeping the delay in the radio section to 1 ms or less (for example, Non-Patent Document 1).
次世代通信では、高周波数帯の使用が見込まれている。当該高周波数帯の特性による、散乱体数の減少、シャドーウィング効果の低下及び距離減衰の増加等の観点から、通信品質の改善が要求される。通信品質を担保するビーム制御及び環境等が必要とされると想定される。
Next-generation communications are expected to use high-frequency bands. Improvements in communication quality are required from the viewpoint of reducing the number of scatterers, reducing shadowing effects, increasing distance attenuation, etc., due to the characteristics of the high frequency band. It is assumed that beam control and environment etc. to ensure communication quality will be required.
例えば、高周波数帯域では、電波の強い直進性等によって、不感地帯が発生しやすい問題がある。そこで、パッシブなリピータ又はアクティブ型の反射板(RIS:Reconfigurable Intelligent Surface)、信号を受信及び増幅し再放射するスマートリピータ等を用いて、マルチパス環境下において、通信品質を改善させる方法が試行されている(例えば非特許文献2)。
For example, in high frequency bands, there is a problem that dead zones are likely to occur due to the strong straightness of radio waves. Therefore, attempts have been made to improve communication quality in a multipath environment using passive repeaters, active reflectors (RIS: Reconfigurable Intelligent Surface), and smart repeaters that receive, amplify, and re-radiate signals. (For example, Non-Patent Document 2).
基地局等の電波発生源から端末等の電波受信先に電波を反射させるか又は透過させて当該電波を中継する反射板又はスマートリピータ等の無線中継装置を使用するとき、信号が無線中継装置により中継されることを想定した初期アクセス方法が要求される。
When using a radio relay device such as a reflector or a smart repeater that reflects or transmits radio waves from a radio wave source such as a base station to a radio wave receiving destination such as a terminal and relays the radio waves, the signal is transmitted by the radio relay device. An initial access method that assumes relaying is required.
本発明は上記の点に鑑みてなされたものであり、無線通信システムにおいて、無線中継装置を介した初期アクセスの信頼性を向上させることを目的とする。
The present invention has been made in view of the above points, and aims to improve the reliability of initial access via a wireless relay device in a wireless communication system.
開示の技術によれば、同期信号及び報知情報を含みインデックスに関連付けられる信号を、複数送信する送信部と、前記信号の送信に係る動作を制御する制御部とを有し、前記制御部は、無線中継装置が存在する場合、前記インデックスに関連付けられる前記信号を追加する基地局が提供される。
According to the disclosed technique, it has a transmission unit that transmits a plurality of signals associated with an index and that includes a synchronization signal and notification information, and a control unit that controls operations related to transmission of the signals, and the control unit includes: A base station is provided for adding said signal associated with said index if a radio repeater is present.
開示の技術によれば、無線通信システムにおいて、無線中継装置を介した初期アクセスの信頼性を向上させることができる。
According to the disclosed technology, it is possible to improve the reliability of initial access via a wireless relay device in a wireless communication system.
以下、図面を参照して本発明の実施の形態を説明する。なお、以下で説明する実施の形態は一例であり、本発明が適用される実施の形態は、以下の実施の形態に限られない。
Embodiments of the present invention will be described below with reference to the drawings. In addition, the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.
本発明の実施の形態の無線通信システムの動作にあたっては、適宜、既存技術が使用される。ただし、当該既存技術は、例えば既存のLTEであるが、既存のLTEに限られない。また、本明細書で使用する用語「LTE」は、特に断らない限り、LTE-Advanced、及び、LTE-Advanced以降の方式(例:NR)を含む広い意味を有するものとする。
Existing technologies are appropriately used for the operation of the wireless communication system according to the embodiment of the present invention. However, the existing technology is, for example, existing LTE, but is not limited to existing LTE. In addition, the term “LTE” used in this specification has a broad meaning including LTE-Advanced and LTE-Advanced and subsequent systems (eg, NR) unless otherwise specified.
また、以下で説明する本発明の実施の形態では、既存のLTEで使用されている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)等の用語を使用する。これは記載の便宜上のためであり、これらと同様の信号、機能等が他の名称で呼ばれてもよい。また、NRにおける上述の用語は、NR-SS、NR-PSS、NR-SSS、NR-PBCH、NR-PRACH等に対応する。ただし、NRに使用される信号であっても、必ずしも「NR-」と明記しない。
Further, in the embodiments of the present invention described below, 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). This is for convenience of description, and signals, functions, etc. similar to these may be referred to by other names. Also, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, and so on. However, even a signal used for NR is not necessarily specified as "NR-".
また、本発明の実施の形態において、複信(Duplex)方式は、TDD(Time Division Duplex)方式でもよいし、FDD(Frequency Division Duplex)方式でもよいし、又はそれ以外(例えば、Flexible Duplex等)の方式でもよい。
Further, in the embodiment of the present invention, 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.
また、本発明の実施の形態において、無線パラメータ等が「設定される(Configure)」とは、所定の値が予め設定(Pre-configure)されることであってもよいし、基地局10又は端末20から通知される無線パラメータが設定されることであってもよい。
Further, in the embodiment of the present invention, "configuring" wireless parameters and the like may mean that predetermined values are preset (Pre-configure), and the base station 10 or A wireless parameter notified from the terminal 20 may be set.
図1は、本発明の実施の形態における無線通信システムを説明するための図である。本発明の実施の形態における無線通信システムは、図1に示されるように、基地局10及び端末20を含む。基地局10及び端末20は、それぞれ複数であってもよい。
FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. A wireless communication system according to an embodiment of the present invention includes a base station 10 and terminals 20, as shown in FIG. A plurality of base stations 10 and terminals 20 may be provided.
基地局10は、1つ以上のセルを提供し、端末20と無線通信を行う通信装置である。無線信号の物理リソースは、時間領域及び周波数領域で定義され、時間領域はOFDM(Orthogonal Frequency Division Multiplexing)シンボル数で定義されてもよいし、周波数領域はサブキャリア数又はリソースブロック数で定義されてもよい。また、時間領域におけるTTI(Transmission Time Interval)がスロット又はサブスロットであってもよいし、TTIがサブフレームであってもよい。
The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. Physical resources of radio signals are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. good too. Also, a TTI (Transmission Time Interval) in the time domain may be a slot or sub-slot, or a TTI may be a sub-frame.
基地局10は、複数のセル(複数のCC(コンポーネントキャリア))を束ねて端末20と通信を行うキャリアアグリゲーションを行うことが可能である。キャリアアグリゲーションでは、1つのプライマリセル(PCell, Primary Cell)と1以上のセカンダリセル(SCell, Secondary Cell)が使用される。
The base station 10 can perform carrier aggregation in which multiple cells (multiple CCs (component carriers)) are bundled and communicated with the terminal 20 . In carrier aggregation, one primary cell (PCell, Primary Cell) and one or more secondary cells (SCell, Secondary Cell) are used.
基地局10は、同期信号及びシステム情報等を端末20に送信する。同期信号は、例えば、NR-PSS及びNR-SSSである。システム情報は、例えば、NR-PBCHあるいはPDSCHにて送信され、ブロードキャスト情報ともいう。図1に示されるように、基地局10は、DL(Downlink)で制御信号又はデータを端末20に送信し、UL(Uplink)で制御信号又はデータを端末20から受信する。なお、ここでは、PUCCH、PDCCH等の制御チャネルで送信されるものを制御信号と呼び、PUSCH、PDSCH等の共有チャネルで送信されるものをデータと呼んでいるが、このような呼び方は一例である。
The base station 10 transmits a synchronization signal, system information, etc. to the terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is transmitted, for example, on NR-PBCH or PDSCH, and is also called broadcast information. As shown in FIG. 1, 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). Here, what is transmitted on control channels such as PUCCH and PDCCH is called a control signal, and what is transmitted on a shared channel such as PUSCH and PDSCH is called data. is.
端末20は、スマートフォン、携帯電話機、タブレット、ウェアラブル端末、M2M(Machine-to-Machine)用通信モジュール等の無線通信機能を備えた通信装置である。図1に示されるように、端末20は、DLで制御信号又はデータを基地局10から受信し、ULで制御信号又はデータを基地局10に送信することで、無線通信システムにより提供される各種通信サービスを利用する。なお、端末20をUEと呼び、基地局10をgNBと呼んでもよい。
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. As shown in FIG. 1 , the terminal 20 receives control signals or data from the base station 10 on the DL and transmits control signals or data to the base station 10 on the UL, thereby performing various functions provided by the wireless communication system. Use communication services. Note that the terminal 20 may be called UE, and the base station 10 may be called gNB.
端末20は、複数のセル(複数のCC)を束ねて基地局10と通信を行うキャリアアグリゲーションを行うことが可能である。キャリアアグリゲーションでは、1つのプライマリセルと1以上のセカンダリセルが使用される。また、PUCCHを有するPUCCH-SCellが使用されてもよい。
The terminal 20 can perform carrier aggregation in which multiple cells (multiple CCs) are bundled and communicated with the base station 10 . One primary cell and one or more secondary cells are used in carrier aggregation. A PUCCH-SCell with PUCCH may also be used.
また、本発明の実施の形態における無線通信システムにおいて、基地局10は、一例として5G又は6Gで運用される無線基地局であり、セルを形成する。なお、セルは、比較的サイズの大きいセルであり、マクロセルと呼ばれる。
Also, in the radio communication system according to the embodiment of the present invention, the base station 10 is, for example, a radio base station operated in 5G or 6G, and forms a cell. A cell is a cell with a relatively large size and is called a macro cell.
基地局10A-基地局10Dは、5G又は6Gで運用される基地局である。基地局10A-基地局10Dは、マクロセルと比較してサイズが小さいセルCA-セルDをそれぞれ形成する。セルA-セルDは、スモールセル又はマクロセル等と呼ばれてもよい。図1に示されるように、セルA-セルDは、マクロセルに含まれるように形成されてもよい。
The base stations 10A to 10D are base stations operated by 5G or 6G. The base stations 10A-10D respectively form cells CA-cell D, which are smaller in size than the macrocell. Cell A-cell D may be called a small cell, a macro cell, or the like. As shown in FIG. 1, cells A-cell D may be formed to be included in a macrocell.
マクロセルは、一般に1つの基地局がカバーする半径数百メートルから数十キロメートルの通信可能エリアと解釈されてもよい。また、スモールセルは、送信電力が小さく、マクロセルと比較して小さいエリアをカバーするセルの総称と解釈されてもよい。
A macrocell may generally be interpreted as a communicable area with a radius of several hundred meters to several tens of kilometers covered by one base station. Also, a small cell may be interpreted as a generic term for cells that have low transmission power and cover a smaller area than a macro cell.
なお、基地局10及び基地局0A-基地局10Dは、gNodeB(gNB)またはBS(Base Station)などと表記されてもよい。また、端末20は、UE又はMS等と表記されてもよい。さらに、基地局及び端末の数や種類を含む無線通信システムの具体的な構成は、図1に示した例に限定されない。
Note that the base station 10 and the base stations 0A to 10D may be denoted as gNodeB (gNB) or BS (Base Station). Also, the terminal 20 may be denoted as UE, MS, or the like. Furthermore, the specific configuration of the wireless communication system, including the numbers and types of base stations and terminals, is not limited to the example shown in FIG.
また、無線通信システムは、必ずしも5G又は6Gに従った無線通信システムに限定されない。例えば、無線通信システムは、6Gの次世代の無線通信システム、あるいはLTEに従った無線通信システムであってもよい。
Also, the wireless communication system is not necessarily limited to a wireless communication system according to 5G or 6G. For example, the wireless communication system may be a 6G next-generation wireless communication system or a wireless communication system according to LTE.
基地局10及び基地局10A-基地局10Dは、一例として、端末20と5G又は6Gに従った無線通信を実行する。基地局10及び基地局10A-基地局10D及び端末20は、複数のアンテナ素子から送信される無線信号を制御することによって、より指向性の高いビームを生成するマッシブMIMO(Massive MIMO)、複数のコンポーネントキャリア(CC)を束ねて用いるキャリアアグリゲーション(CA)、端末20と2つのNG-RANノードそれぞれとの間において同時に通信を行うデュアルコネクティビティ(DC)、および、gNB等の無線通信ノード間の無線バックホールと端末20への無線アクセスとが統合されたIAB(Integrated Access and Backhaul)等に対応してもよい。
As an example, the base station 10 and the base stations 10A to 10D perform wireless communication with the terminal 20 according to 5G or 6G. Base station 10 and base station 10A-base station 10D and terminal 20 control radio signals transmitted from a plurality of antenna elements to generate beams with higher directivity (Massive MIMO), a plurality of Carrier aggregation (CA) that bundles component carriers (CC), dual connectivity (DC) that simultaneously communicates between terminal 20 and two NG-RAN nodes, and radio between wireless communication nodes such as gNB It may correspond to IAB (Integrated Access and Backhaul) in which the backhaul and radio access to the terminal 20 are integrated, or the like.
また、無線通信システムは、3GPPリリース15において規定されている以下の周波数レンジ(Frequency Range, FR)よりも高い高周波数帯域にも対応し得る。例えば、FR1として、410MHz-7.125GHzに対応してもよいし、FR2として、24.25GHz-52.6GHzに対応してもよい。さらに、無線通信システムは、52.6GHzを超え、114.25GHzまでの周波数帯域に対応してもよい。当該周波数帯域はミリ波帯と呼ばれてもよい。
Also, the radio communication system can support high frequency bands higher than the following frequency ranges (Frequency Range, FR) specified in 3GPP Release 15. For example, FR1 may correspond to 410 MHz-7.125 GHz, and FR2 may correspond to 24.25 GHz-52.6 GHz. Additionally, the wireless communication system may support frequency bands above 52.6 GHz and up to 114.25 GHz. This frequency band may be referred to as the millimeter wave band.
ここで、マッシブMIMOに対応する基地局10は、ビームを送信できる。マッシブMIMOとは、一般的に、100素子以上のアンテナ素子を有するアンテナを用いたMIMO通信を意味し、複数ストリームの多重化効果などによって、従来よりも高速な無線通信が可能となる。また、高度なビームフォーミングも可能となる。ビーム幅は、使用する周波数帯域又は端末20の状態等に応じて動的に変更し得る。また、狭いビームを用いることによるビームフォーミング利得による受信信号電力の増加を図ることができる。さらに、与干渉の低減及び無線リソースの有効利用等の効果が見込まれる。
Here, the base station 10 supporting massive MIMO can transmit beams. Massive MIMO generally means MIMO communication using an antenna having 100 or more antenna elements, and enables faster wireless communication than before due to the effect of multiplexing multiple streams. Advanced beamforming is also possible. The beam width can be dynamically changed according to the frequency band to be used, the state of the terminal 20, or the like. Also, it is possible to increase the received signal power by beam forming gain by using a narrow beam. Furthermore, effects such as reduction of interference and effective use of radio resources are expected.
また、無線通信システムは、無線中継装置30を含んでよい。本発明の実施の形態において、一例として、無線中継装置30は、反射板(RIS)、位相制御リフレクタ、パッシブリピータ、IRS(インテリジェント反射面:Intelligent Reflecting Surface)等であってもよい。反射板(RIS:Reconfigurable Intelligent Surface)の具体例として、メタマテリアル反射板、動的メタサーフェス、メタサーフェスレンズ等と呼ばれるものであってもよい(例えば非特許文献2)。
Also, the wireless communication system may include the wireless relay device 30 . In the embodiment of the present invention, as an example, the radio repeater 30 may be a reflector (RIS), a phase control reflector, a passive repeater, an IRS (Intelligent Reflecting Surface), or the like. Specific examples of reflectors (RIS: Reconfigurable Intelligent Surface) may be those called metamaterial reflectors, dynamic metasurfaces, metasurface lenses, and the like (for example, Non-Patent Document 2).
本発明の実施の形態において、無線中継装置30は、例えば、基地局10Aから送信された無線信号を中継する。本発明の実施の形態の説明において「中継」とは、「反射」、「透過」、「集約(電波を略一点に集中させること)」及び「回折」のうち少なくとも一つを指してもよい。端末20は、無線中継装置30によって中継された無線信号を受信できる。さらに、無線中継装置30は、端末20から送信された無線信号を中継してもよいし、基地局10から送信された無線信号を中継してもよい。
In the embodiment of the present invention, the radio relay device 30 relays radio signals transmitted from the base station 10A, for example. In the description of the embodiments of the present invention, "relay" may refer to at least one of "reflection", "transmission", "concentration (concentrating radio waves to approximately one point)", and "diffraction". . The terminal 20 can receive the radio signal relayed by the radio relay device 30 . Furthermore, the radio relay device 30 may relay a radio signal transmitted from the terminal 20 or may relay a radio signal transmitted from the base station 10 .
一例として、無線中継装置30は、端末20に向けて中継する無線信号の位相を変化させることができる。このような観点から、無線中継装置30は、位相可変リフレクタと呼ばれてもよい。なお、本実施の形態において、無線中継装置30は、無線信号の位相を変化させて中継する機能を有するものとする場合があるが、これに限られない。また、無線中継装置30は、リピータ、中継装置、リフレクトアレイ、IRS、或いはトランスミットアレイ等と呼ばれてもよい。
As an example, the radio relay device 30 can change the phase of the radio signal relayed to the terminal 20 . From this point of view, the radio relay device 30 may be called a variable phase reflector. Note that in the present embodiment, the radio relay device 30 may have a function of changing the phase of the radio signal and relaying it, but the present invention is not limited to this. Also, the wireless relay device 30 may be called a repeater, a relay device, a reflect array, an IRS, a transmit array, or the like.
また、本発明の実施の形態において、RIS等の無線中継装置30は、Battery less device、メタマテリアル機能装置、Intelligent reflecting surface、Smart repeater等と呼ばれてもよい。一例として、RIS又はスマートリピータ等の無線中継装置30は、以下1)-5)に示される機能を有するものとして定義されてもよい。
Also, in the embodiment of the present invention, the wireless relay device 30 such as RIS may be called a batteryless device, a metamaterial functional device, an intelligent reflecting surface, a smart repeater, or the like. As an example, a wireless relay device 30 such as a RIS or smart repeater may be defined as having the functions shown in 1)-5) below.
1)基地局10から送信される信号の受信機能を有してもよい。当該信号は、DL信号である、SSB(SS/PBCH block)、PDCCH、PDSCH、DM-RS(Demodulation Reference Signal)、PT-RS(Phase Tracking Reference Signal)、CSI-RS(Channel Status Information Reference Signal)、RIS専用信号等であってもよい。メタマテリアル機能に係る情報を運ぶ信号の受信機能を有してもよい。なお、当該信号を端末20に送信する送信機能を有してもよい。SSBは、同期信号及び報知情報を含む信号であってもよい。
1) It may have a function of receiving signals transmitted from the base station 10 . The signals are DL signals, SSB (SS/PBCH block), PDCCH, PDSCH, DM-RS (Demodulation Reference Signal), PT-RS (Phase Tracking Reference Signal), CSI-RS (Channel Status Information Reference Signal) , RIS dedicated signals, and the like. It may also be capable of receiving signals carrying information relating to metamaterial function. In addition, it may have a transmission function for transmitting the signal to the terminal 20 . The SSB may be a signal including a synchronization signal and broadcast information.
2)基地局10への信号の送信機能を有してもよい。当該信号は、UL信号である、PRACH、PUCCH、PUSCH、DM-RS、PT-RS、SRS、RIS専用信号等であってもよい。メタマテリアル機能に係る情報の送信機能を有してもよい。なお、当該信号を端末20から受信する受信機能を有してもよい。
2) It may have a function of transmitting signals to the base station 10 . The signals may be PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals, etc., which are UL signals. It may have a function of transmitting information related to the metamaterial function. In addition, it may have a reception function for receiving the signal from the terminal 20 .
3)基地局10とのフレーム同期機能を有してもよい。なお、端末20とのフレーム同期機能を有してもよい。
3) It may have a frame synchronization function with the base station 10 . Note that a frame synchronization function with the terminal 20 may be provided.
4)基地局10又は端末20から送信された信号の反射機能を有してもよい。例えば、当該反射機能は、位相変更に係る機能、ビーム制御に係る機能(例えば、TCI(Transmission Configuration Indication)-state、QCL(Quasi Co Location)の制御に係る機能、ビームの選択適用、空間フィルタ/プリコーディングウェイトの選択適用)であってもよい。
5)基地局10又は端末20から送信された信号の電力変更機能を有してもよい。例えば、当該電力変更機能は、電力増幅であってもよい。 4) It may have a function of reflecting signals transmitted from thebase station 10 or the terminal 20 . For example, the reflection function includes a function related to phase change, a function related to beam control (for example, TCI (Transmission Configuration Indication)-state, a function related to QCL (Quasi Co Location) control, beam selection application, spatial filter / selective application of precoding weights).
5) It may have a function of changing the power of the signal transmitted from thebase station 10 or terminal 20 . For example, the power modification function may be power amplification.
5)基地局10又は端末20から送信された信号の電力変更機能を有してもよい。例えば、当該電力変更機能は、電力増幅であってもよい。 4) It may have a function of reflecting signals transmitted from the
5) It may have a function of changing the power of the signal transmitted from the
また、RIS又はスマートリピータ等の無線中継装置30における「受信して送信」や「中継」とは、以下の機能Aまで行われるが、以下の機能Bまでは行われずに送信されることを意味してもよい。
機能A:移相器を適用する。
機能B:補償回路(例えば、増幅、フィルタ)は介さない。 In addition, "receiving and transmitting" and "relaying" in thewireless relay device 30 such as RIS or smart repeater means that although function A below is performed, transmission is performed without performing function B below. You may
Function A: Apply a phase shifter.
Function B: No compensation circuit (eg, amplification, filter) is involved.
機能A:移相器を適用する。
機能B:補償回路(例えば、増幅、フィルタ)は介さない。 In addition, "receiving and transmitting" and "relaying" in the
Function A: Apply a phase shifter.
Function B: No compensation circuit (eg, amplification, filter) is involved.
他の例として、
機能A:移相器及び補償回路を適用する。
機能B:周波数変換は介さない。 As another example,
Function A: Apply phase shifters and compensation circuits.
Function B: No frequency conversion is involved.
機能A:移相器及び補償回路を適用する。
機能B:周波数変換は介さない。 As another example,
Function A: Apply phase shifters and compensation circuits.
Function B: No frequency conversion is involved.
なお、RIS等の無線中継装置30において、位相が変化されるとき、振幅が増幅されてもよい。また、RIS等の無線中継装置30における「中継」とは、レイヤ2又はレイア3レベルの処理を行わずに、受信した信号をそのまま送信すること、物理層レベルで受信した信号をそのまま送信すること、あるいは、信号を解釈せずに受信した信号をそのまま送信することを意味してもよい(その際、位相の変化や振幅の増幅等が行われてもよい)。
It should be noted that the amplitude may be amplified when the phase is changed in the wireless relay device 30 such as the RIS. In addition, "relay" in the wireless relay device 30 such as RIS means transmitting the received signal as it is without performing layer 2 or layer 3 level processing, or transmitting the signal received at the physical layer level as it is. Alternatively, it may mean transmitting the received signal as it is without interpreting the signal (at that time, phase change, amplitude amplification, etc. may be performed).
(装置構成)
次に、本発明の実施の形態における処理及び動作を実行する基地局10、端末20及び無線中継装置30の機能構成例を説明する。基地局10、端末20及び無線中継装置30は後述する実施例を実行する機能を含む。ただし、基地局10、端末20及び無線中継装置30はそれぞれ、実施例のうちのいずれかの機能のみを備えてもよい。 (Device configuration)
Next, functional configuration examples of thebase station 10, the terminal 20, and the radio relay device 30 that execute processing and operations according to the embodiment of the present invention will be described. The base station 10, the terminal 20, and the radio relay device 30 include functions for executing embodiments described later. However, each of the base station 10, the terminal 20 and the radio relay device 30 may have only one of the functions of the embodiments.
次に、本発明の実施の形態における処理及び動作を実行する基地局10、端末20及び無線中継装置30の機能構成例を説明する。基地局10、端末20及び無線中継装置30は後述する実施例を実行する機能を含む。ただし、基地局10、端末20及び無線中継装置30はそれぞれ、実施例のうちのいずれかの機能のみを備えてもよい。 (Device configuration)
Next, functional configuration examples of the
<基地局10>
図2は、基地局10の機能構成の一例を示す図である。図2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2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。 <Base station 10>
FIG. 2 is a diagram showing an example of the functional configuration of thebase station 10. As shown in FIG. As shown in FIG. 2 , the base station 10 has a transmitter 110 , a receiver 120 , a setter 130 and a controller 140 . The functional configuration shown in FIG. 2 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.
図2は、基地局10の機能構成の一例を示す図である。図2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2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。 <
FIG. 2 is a diagram showing an example of the functional configuration of the
送信部110は、端末20側に送信する信号を生成し、当該信号を無線で送信する機能を含む。受信部120は、端末20から送信された各種の信号を受信し、受信した信号から、例えばより上位のレイヤの情報を取得する機能を含む。また、送信部110は、端末20へNR-PSS、NR-SSS、NR-PBCH、DL/UL制御信号、DLデータ等を送信する機能を有する。また、送信部110は、実施例で説明する設定情報等を送信する。
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. Also, 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 setting information and the like to be described in the embodiments.
設定部130は、予め設定される設定情報、及び、端末20に送信する各種の設定情報を記憶装置に格納し、必要に応じて記憶装置から読み出す。制御部140は、例えば、リソース割り当て、基地局10全体の制御等を行う。なお、制御部140における信号送信に関する機能部を送信部110に含め、制御部140における信号受信に関する機能部を受信部120に含めてもよい。また、送信部110、受信部120をそれぞれ送信機、受信機と呼んでもよい。
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, for example, resource allocation, overall control of the base station 10, and the like. 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.
<端末20>
図3は、端末20の機能構成の一例を示す図である。図3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3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。 <Terminal 20>
FIG. 3 is a diagram showing an example of the functional configuration of the terminal 20. As shown in FIG. As shown in FIG. 3 , the terminal 20 has atransmitter 210 , a receiver 220 , a setter 230 and a controller 240 . The functional configuration shown in FIG. 3 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.
図3は、端末20の機能構成の一例を示す図である。図3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3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。 <
FIG. 3 is a diagram showing an example of the functional configuration of the terminal 20. As shown in FIG. As shown in FIG. 3 , the terminal 20 has a
送信部210は、送信データから送信信号を作成し、当該送信信号を無線で送信する。受信部220は、各種の信号を無線受信し、受信した物理レイヤの信号からより上位のレイヤの信号を取得する。また、送信部210はHARQ-ACKを送信し、受信部220は、実施例で説明する設定情報等を受信する。
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 setting information and the like described in the embodiments.
設定部230は、受信部220により基地局10から受信した各種の設定情報を記憶装置に格納し、必要に応じて記憶装置から読み出す。また、設定部230は、予め設定される設定情報も格納する。制御部240は、端末20全体の制御等を行う。なお、制御部240における信号送信に関する機能部を送信部210に含め、制御部240における信号受信に関する機能部を受信部220に含めてもよい。また、送信部210、受信部220をそれぞれ送信機、受信機と呼んでもよい。
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 controls the terminal 20 as a whole. 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.
<無線中継装置30>
図4は、本発明の実施の形態における無線中継装置30の機能構成の一例を示す図である。図4に示されるように、無線中継装置30は、送信部310、受信部320、制御部330、可変部340及びアンテナ部350を有する。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310と受信部320とを通信部と呼んでもよい。 <Radio relay device 30>
FIG. 4 is a diagram showing an example of the functional configuration of thewireless relay device 30 according to the embodiment of the invention. As shown in FIG. 4 , the radio relay device 30 has a transmitting section 310 , a receiving section 320 , a control section 330 , a variable section 340 and an antenna section 350 . 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 310 and the receiving unit 320 may be called a communication unit.
図4は、本発明の実施の形態における無線中継装置30の機能構成の一例を示す図である。図4に示されるように、無線中継装置30は、送信部310、受信部320、制御部330、可変部340及びアンテナ部350を有する。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310と受信部320とを通信部と呼んでもよい。 <
FIG. 4 is a diagram showing an example of the functional configuration of the
アンテナ部350には、可変部340に接続された少なくとも1つのアンテナが含まれる。例えば、アンテナ部350は、アレイアンテナとして配置されてもよい。本発明の実施の形態において、アンテナ部350を特に中継アンテナと呼ぶ場合がある。なお、可変部340及びアンテナ部350を中継部と呼んでもよい。
The antenna section 350 includes at least one antenna connected to the variable section 340 . For example, the antenna section 350 may be arranged as an array antenna. In the embodiment of the present invention, the antenna section 350 may be particularly called a relay antenna. Note that the variable section 340 and the antenna section 350 may be called a relay section.
可変部340は、アンテナ部350に接続されており、位相、負荷、振幅等を変化させることができる。例えば、可変部340は、可変位相器、移相器、アンプ等であってもよい。例えば、電波発生源から中継アンテナに届いた電波の位相を変えることにより、電波の向き又はビーム等を変化させることができる。
The variable section 340 is connected to the antenna section 350 and can change the phase, load, amplitude, and the like. For example, variable section 340 may be a variable phase shifter, phase shifter, amplifier, or the like. For example, by changing the phase of the radio wave that reaches the relay antenna from the radio wave source, the direction or beam of the radio wave can be changed.
制御部330は、可変部340を制御する制御手段である。本発明の実施の形態において、制御部330は、基地局10又は端末20からの電波を信号解釈せず中継する際の中継状態を制御する制御部として機能する。ここで、制御部330は、基地局10又は端末20から通信部を介して受信した制御情報に基づいて中継状態を変化させてもよく、基地局10又は端末20からの電波の受信状態に基づいて、中継状態を変化させてもよい。例えば、制御部330は、SSB等の制御情報に基づいて、適切な受信ビームと送信ビーム(の向き)を選択し、可変部340を制御してもよい。同様に、制御部330は、受信状態から、受信品質あるいは受信電力が最も大きい等の基準に基づいて、適切な受信方向と送信方向の組み合わせを選択し、可変部340を制御してもよい。
The control unit 330 is control means for controlling the variable unit 340 . In the embodiment of the present invention, the control unit 330 functions as a control unit that controls the relay state when relaying radio waves from the base station 10 or the terminal 20 without signal interpretation. Here, the control unit 330 may change the relay state based on control information received from the base station 10 or the terminal 20 via the communication unit. to change the relay state. For example, based on control information such as SSB, the control unit 330 may select (directions of) appropriate reception beams and transmission beams and control the variable unit 340 . Similarly, control section 330 may select an appropriate combination of reception direction and transmission direction based on criteria such as the highest reception quality or reception power from the reception state, and control variable section 340 .
また、本発明の実施の形態において、制御部330は、例えば、端末20又は基地局10Aとアンテナ部350との間の伝搬路に関する情報(受信状態により推定した情報及び制御情報を含む。以下同様)に基づいて、可変部340を制御することができる。例えば、制御部330は、アクティブリピータ又はRIS等の公知手法を用いて、基地局10Aから受信した電波を、送信電力を用いずに、位相を変化させることによって、電波受信先(この場合は端末20)等の特定の方向へ中継することができる。具体的には、制御部330は、推定した伝搬路情報HPT及びHRPに基づいて、端末20又は基地局10Aに向けて中継するために無線信号の位相を制御する。すなわち、ビームフォーミング等と同様の原理で、アレーアンテナ等の位相を変化させることで、特定の方向へ電波を中継することができる。なお、無線中継装置30は、制御部330によって無線信号(電波)の位相のみを制御して(変化させて)おり、中継される無線信号の電力の増幅などを行うことなく、無給電で中継してもよい。
In addition, in the embodiment of the present invention, the control unit 330 includes, for example, information on the propagation path between the terminal 20 or the base station 10A and the antenna unit 350 (including information estimated from the reception state and control information. ), the variable section 340 can be controlled. For example, the control unit 330 uses a known method such as an active repeater or RIS to change the phase of the radio wave received from the base station 10A without using the transmission power, so that the radio wave receiving destination (in this case, the terminal 20) can be relayed in a specific direction. Specifically, based on the estimated channel information H PT and H RP , the control unit 330 controls the phase of the radio signal for relaying to the terminal 20 or base station 10A. That is, it is possible to relay radio waves in a specific direction by changing the phase of an array antenna or the like based on the same principle as beam forming. The wireless relay device 30 controls (changes) only the phase of the wireless signal (radio wave) by the control unit 330, and relays the wireless signal without power supply without amplifying the power of the wireless signal to be relayed. You may
また、制御部330は、本発明の実施の形態において、受信状態により情報を取得してもよい。また、受信部320は、基地局10A又は端末20からの制御情報を取得してもよい。例えば、受信部320は、基地局10A又は端末20から送信された、SSB等の各種の信号(上述の機能で例示した各種の信号を含む)を制御情報として受信してもよい。
Also, in the embodiment of the present invention, the control unit 330 may acquire information according to the reception state. Also, the receiving unit 320 may acquire control information from the base station 10A or the terminal 20 . For example, the receiving unit 320 may receive various signals such as SSB (including various signals exemplified in the functions described above) transmitted from the base station 10A or the terminal 20 as control information.
また、制御部330は、可変部340の制御時の受信状態(例えば、受信電力の変化等)に基づいて、電波発生源(例えば、基地局10A又は端末20)とアンテナ部350間の伝搬路情報(HPT及びHRP)を推定してもよい。
In addition, the control unit 330 controls the propagation path between the radio wave source (eg, the base station 10A or the terminal 20) and the antenna unit 350 based on the reception state (eg, change in received power) when the variable unit 340 is controlled. Information (H PT and H RP ) may be estimated.
各伝搬路に関する伝搬路情報(伝搬チャネル情報)は、具体的には、振幅又は位相等の情報であり、本発明の実施の形態において、アンテナ部350に到来する電波の伝搬路に関して推定した情報である。一例として、制御部330は、I/Q(In-phase/Quadrature)検波と同様の原理で、アレー状のアンテナ部350の可変部340の位相を直交に切り替えたときの受信電力の変化に基づいて、アンテナ部350の伝搬路情報を推定してもよい。
The propagation path information (propagation channel information) on each propagation path is specifically information such as amplitude or phase. is. As an example, the control unit 330, based on the same principle as I/Q (In-phase/Quadrature) detection, changes the received power when switching the phase of the variable unit 340 of the array-shaped antenna unit 350 to orthogonal. The propagation path information of the antenna unit 350 may be estimated by using the
図5は、本発明の実施の形態における無線中継装置30の動作例を示す図である。図5に示されるように、一例として、無線中継装置30は、基地局10A(他の基地局10等でもよい)と、端末20との間に介在し、基地局10Aと端末20との間において送受信される無線信号を中継(反射、透過、集約、回折等)する。
FIG. 5 is a diagram showing an operation example of the wireless relay device 30 according to the embodiment of the present invention. As shown in FIG. 5 , as an example, the radio relay device 30 is interposed between the base station 10A (other base stations 10 or the like) and the terminal 20, and is interposed between the base station 10A and the terminal 20. relays (reflects, transmits, aggregates, diffracts, etc.) radio signals transmitted and received in
具体例として、基地局10Aと端末20とは、無線品質が良好な場合には、無線中継装置30を経由せずに、直接、無線信号を送受信する。一方、基地局10Aと端末20との間に遮蔽物がある場合等、当該無線品質が劣化した場合、無線中継装置30は、基地局10Aと端末20との間において送受信される無線信号を中継する。
As a specific example, the base station 10A and the terminal 20 directly transmit and receive wireless signals without going through the wireless relay device 30 when the wireless quality is good. On the other hand, when the radio quality deteriorates, such as when there is a shield between the base station 10A and the terminal 20, the radio relay device 30 relays radio signals transmitted and received between the base station 10A and the terminal 20. do.
具体的には、無線中継装置30は、可変位相器等の可変部340の制御時の受信電力の変化に基づいて、基地局10A又は端末20等の電波発生源と中継アンテナ間の伝搬路情報HPT、HRTを推定し、推定した伝搬路情報に基づいて、可変位相器などの可変部340を制御することにより端末20等の電波受信先に向けて無線信号を中継する。なお、伝搬路情報HPT、HRTを推定することに限られず、無線中継装置30は、基地局10A又は端末20から受信した制御情報に基づいて、可変位相器などの可変部340を制御することにより基地局10A又は端末20等の電波受信先に向けて無線信号を中継してもよい。
Specifically, the radio relay apparatus 30, based on the change in the received power during control of the variable unit 340 such as a variable phase shifter, transmits the propagation path information between the radio wave source such as the base station 10A or the terminal 20 and the relay antenna. By estimating H PT and H RT and controlling a variable section 340 such as a variable phase shifter based on the estimated channel information, the radio signal is relayed to the radio wave receiving destination such as the terminal 20 . Note that the radio relay apparatus 30 is not limited to estimating the channel information H PT and H RT , and controls the variable section 340 such as a variable phase shifter based on the control information received from the base station 10A or the terminal 20. Accordingly, the radio signal may be relayed toward the radio wave reception destination such as the base station 10A or the terminal 20. FIG.
ここで、伝搬路あるいは伝搬チャネルとは、無線通信の個々の通信路であり、ここでは、各送受信アンテナ(図中の基地局アンテナ及び端末アンテナ等)間の通信路である。
Here, a propagation path or a propagation channel is an individual communication path of wireless communication, and here is a communication path between each transmitting/receiving antenna (base station antenna, terminal antenna, etc. in the figure).
一例として、無線中継装置30は、マッシブMIMOに対応した小型多素子アンテナを有するアンテナ部350と、無線信号、実質的には、電波の位相を特定の位相に変化させる可変位相器あるいは移相器を有する可変部340を備え、可変部340を用いて、端末20又は基地局10Aに中継される電波の位相を制御する。
As an example, the radio relay apparatus 30 includes an antenna section 350 having a small multi-element antenna compatible with Massive MIMO, and a variable phase shifter or phase shifter that changes the phase of a radio signal, substantially a radio wave, to a specific phase. and using the variable unit 340, the phase of the radio wave relayed to the terminal 20 or the base station 10A is controlled.
図6は、高周波数帯域における通信の例を示す図である。図6に示されるように、数GHz-数十GHz以上の高周波数帯域を用いる場合において、電波の強い直進性によって、不感地帯が発生しやすい。基地局10Aと端末20との間が見通せる場合、当該高周波数帯域を用いる場合でも、基地局10Aと端末20間の無線通信に影響はない。一方、例えば、建造物又は樹木など、遮蔽物によって、基地局10Aと端末20との間の見通しが遮蔽されると、無線品質が大幅に劣化する。すなわち、端末20が遮蔽物によって遮蔽される不感地帯に移動すると、通信が途絶えることになり得る。
FIG. 6 is a diagram showing an example of communication in a high frequency band. As shown in FIG. 6, when a high frequency band of several GHz to several tens of GHz or more is used, a dead zone is likely to occur due to the strong rectilinear propagation of radio waves. When the line between the base station 10A and the terminal 20 is visible, wireless communication between the base station 10A and the terminal 20 is not affected even when the high frequency band is used. On the other hand, if the line of sight between the base station 10A and the terminal 20 is blocked by an obstacle such as a building or a tree, the radio quality is greatly degraded. That is, when the terminal 20 moves to a dead zone blocked by a shield, communication may be interrupted.
高速大容量、かつ低遅延特性を活かしたアプリケーション(遠隔操作等)の存在を考慮すると、不感地帯を解消し、無線通信システム内での通信が途絶えることなく、基地局と端末とが接続を確保することが重要である。
Considering the existence of applications (remote control, etc.) that make use of high-speed, large-capacity, and low-delay characteristics, dead zones can be eliminated, and connections between base stations and terminals can be secured without interruption of communication within the wireless communication system. It is important to.
そこで、RIS又はスマートリピータ等の電波伝搬制御装置のように、基地局10Aと端末20との間の電波を中継することができる技術が開発されている。このように、基地局信号の伝搬特性を制御することで通信特性を改善させることができ、信号源不要でカバレッジ拡大、基地局の増設による設置及び運用コストの減少を図ることができる。
Therefore, technology has been developed that can relay radio waves between the base station 10A and the terminal 20, such as radio wave propagation control devices such as RIS or smart repeaters. Thus, by controlling the propagation characteristics of base station signals, communication characteristics can be improved, coverage can be expanded without requiring signal sources, and installation and operation costs can be reduced by increasing the number of base stations.
従来の電波伝搬制御装置では、パッシブ型とアクティブ型がある。パッシブ型は、制御情報が不要であるというメリットがあるものの、移動体又は環境変動等に追従することができない。一方、アクティブ型は、制御情報が必要でオーバヘッドが増加するデメリットがあるものの、制御アンテナの負荷(位相)状態を変化させて、電波の伝搬特性を可変的に制御可能であり、移動体及び環境変動等にも追従することができる。
There are two types of conventional radio wave propagation control devices: passive and active. The passive type has the advantage of not requiring control information, but cannot follow moving objects or environmental changes. On the other hand, the active type requires control information and has the disadvantage of increasing overhead. Fluctuations and the like can also be followed.
アクティブ型の電波伝搬制御装置と制御手法には、フィードバック(FB)規範と伝搬路情報規範の2つのタイプがある。FB規範では、可変型の電波伝搬制御装置が、負荷(位相)状態をランダムに変化させたときの通信状態を、端末20等にフィードバックしてもらい、最適条件を探索する。一方、伝搬路情報規範では、基地局と電波伝搬制御装置との間の伝搬路情報に基づいて負荷状態を決定し、最適な電波伝搬制御が可能となる。本発明の実施の形態においては、いずれのタイプであっても適用可能である。
There are two types of active radio wave propagation control devices and control methods: feedback (FB) norms and propagation path information norms. In the FB standard, the variable radio wave propagation control device searches for the optimum condition by having the terminal 20 or the like feed back the communication state when the load (phase) state is changed at random. On the other hand, according to the propagation path information standard, the load state is determined based on the propagation path information between the base station and the radio wave propagation control device, and optimum radio wave propagation control becomes possible. Either type is applicable in the embodiment of the present invention.
また、中継方法としては、反射、透過、回折、集約等のタイプがあるが、本実施の形態において、一例として、以下に、反射型と透過型の構成例について説明する(回折型と集約型は非特許文献2等参照)。
As relay methods, there are types such as reflection, transmission, diffraction, and consolidation. See Non-Patent Document 2, etc.).
図7は、本発明の実施の形態における反射型の無線中継装置30の例を示す図である。反射型の無線中継装置30のシステム構成の一例について、図7を用いて説明する。図7は、基地局10A等の送信アンテナTxと、透過型の無線中継装置30の中継アンテナSxと、端末20等の受信アンテナRxの関係を示した図である。図7に示すように、本発明の実施の形態においては、MIMOを一例としており、Tx-Sx間の複数の伝搬路と、Sx-Rx間の複数の伝搬路が存在しており、無線中継装置30は、中継アンテナSxの可変位相器等を有する可変部340を制御して電波を中継する。
FIG. 7 is a diagram showing an example of the reflective wireless relay device 30 according to the embodiment of the present invention. An example of the system configuration of the reflective radio relay device 30 will be described with reference to FIG. FIG. 7 is a diagram showing the relationship among the transmitting antenna Tx of the base station 10A and the like, the relay antenna Sx of the transmissive radio relay device 30, and the receiving antenna Rx of the terminal 20 and the like. As shown in FIG. 7, in the embodiment of the present invention, MIMO is taken as an example, and there are a plurality of propagation paths between Tx-Sx and a plurality of propagation paths between Sx-Rx. The device 30 relays radio waves by controlling a variable section 340 having a variable phase shifter or the like of the relay antenna Sx.
図7に示されるように、反射型の場合、アレー状の中継アンテナは、同じ方向に向けられて配置されている。これにより、中継アンテナの位相条件を複数変化させた際に観測される受信状態に基づいて、中継アンテナの伝搬路を推定することができる。
As shown in FIG. 7, in the case of the reflection type, the arrayed relay antennas are arranged facing the same direction. Thereby, the propagation path of the relay antenna can be estimated based on the reception state observed when the phase conditions of the relay antenna are changed in a plurality of ways.
図8は、本発明の実施の形態における透過型の無線中継装置30の例を示す図である。透過型の無線中継装置30のシステム構成の一例について、図8を用いて説明する。図8は、基地局10A等の送信アンテナTxと、透過型の無線中継装置30の中継アンテナSxと、端末20等の受信アンテナRxの関係を示した図である。図8に示されるように、本発明の実施の形態においては、MIMOを一例としており、Tx-Sx間の複数の伝搬路と、Sx-Rx間の複数の伝搬路が存在しており、無線中継装置30は、図示の如く、中継アンテナSxの可変位相器等の可変部340を介して、一方の側から到来した電波を他方の側へ中継する。このように、透過型の場合、図左側の基準アンテナと図右側中継アンテナは、一方の側から到来した電波を他方の側へ中継することができるように、それぞれ一対で反対方向に向けられて配置されている。透過型、反射型のいずれであっても、電力検出器等により、中継アンテナに届いた電力を検出できるように構成して、受信状態を計測してもよい。また、中継アンテナの位相条件を複数変化させた際に観測される受信信号に基づいて、中継アンテナの伝搬路を推定することができる。
FIG. 8 is a diagram showing an example of the transparent wireless relay device 30 according to the embodiment of the present invention. An example of the system configuration of the transparent wireless relay device 30 will be described with reference to FIG. FIG. 8 is a diagram showing the relationship among the transmitting antenna Tx of the base station 10A and the like, the relay antenna Sx of the transmissive radio relay device 30, and the receiving antenna Rx of the terminal 20 and the like. As shown in FIG. 8, in the embodiment of the present invention, MIMO is taken as an example, and there are a plurality of propagation paths between Tx and Sx and a plurality of propagation paths between Sx and Rx. As illustrated, the relay device 30 relays radio waves arriving from one side to the other side via a variable section 340 such as a variable phase shifter of the relay antenna Sx. In this way, in the case of the transmissive type, the reference antenna on the left side of the figure and the relay antenna on the right side of the figure are paired and directed in opposite directions so that radio waves arriving from one side can be relayed to the other side. are placed. Regardless of whether it is a transmission type or a reflection type, a power detector or the like may be configured to detect the power reaching the relay antenna, and the reception state may be measured. Further, the propagation path of the relay antenna can be estimated based on the received signals observed when the phase conditions of the relay antenna are varied.
例えば6G等の将来のネットワークでは、5Gと比較してさらに高い品質が要求される。例えば、テラbpsオーダの超高速、光通信レベルの高信頼低遅延等が求められる。また、超カバレッジ拡張、超長距離通信、超信頼性通信、仮想セル、フレキシブルネットワーク、メッシュネットワーク、サイドリンクの強化、RIS又はスマートリピータを考慮した設計が必要となる。
For example, future networks such as 6G will require even higher quality than 5G. For example, ultra-high speed on the order of tera bps, high reliability and low delay on the level of optical communication, etc. are required. In addition, designs considering ultra-coverage extension, ultra-long distance communication, ultra-reliable communication, virtual cells, flexible networks, mesh networks, enhancement of sidelinks, RIS or smart repeaters are required.
当該品質の実現に向けて、非常に高い周波数、例えばテラHz波の利用が想定される。例えば、テラHz波のような非常に高い周波数を利用する場合、超広帯域利用による高速化、シンボル長の短さによる低遅延化が利点として想定される一方、減衰率の大きさによるカバレッジの狭さ、直進性の高さによる信頼性の低下等の欠点も想定される。6G通信が必要とされる各地点に対して、どのように冗長性を確保するか、すなわちどのように通信の送信ポイントを増加させるかを検討することが要求される。
To achieve this quality, the use of extremely high frequencies, such as terahertz waves, is envisioned. For example, when using extremely high frequencies such as terahertz waves, it is assumed that the benefits are speedup due to the use of ultra-wideband and low delay due to the short symbol length. It is also assumed that there are drawbacks such as a decrease in reliability due to the high straightness. For each point where 6G communication is required, it is required to consider how to ensure redundancy, that is, how to increase the number of communication transmission points.
上述のように、RISは、基地局10又は端末20から送信されるビームを所定の方向に反射又は透過し、端末20又は基地局10に届ける。パッシブ型RISは、移動局の位置に応じて反射角度又はビーム幅等の制御を変更しない装置であって、制御情報が不必要である一方、精密なビーム制御が困難である。アクティブ型RISは、移動局の位置に応じて反射角度及びビーム幅等の制御を変更する装置であって、精密なビーム制御が可能である一方、制御情報が必要なためオーバヘッドば増大する。RISにより、通信の送信ポイントを増加させることができる。
As described above, the RIS reflects or transmits a beam transmitted from the base station 10 or the terminal 20 in a predetermined direction and delivers it to the terminal 20 or the base station 10. A passive RIS is a device that does not change the control of the reflection angle or beam width according to the position of the mobile station, and while control information is unnecessary, precise beam control is difficult. The active RIS is a device that changes the control of the reflection angle, beam width, etc. according to the position of the mobile station, and while it is capable of precise beam control, it requires control information, so the overhead increases. RIS allows more transmission points for communication.
なお、RISは、以下1)-4)に示される名称であってもよく、これらに限定されない。
1)バッテリレスデバイス(Battery less device)
2)メタマテリアル機能装置
3)インテリジェント反射板(Intelligent reflecting surface)
4)スマートリピータ(Smart repeater) Note that RIS may be the names shown in 1) to 4) below, but are not limited to these.
1) Battery less device
2) Metamaterial functional device 3) Intelligent reflecting surface
4) Smart repeater
1)バッテリレスデバイス(Battery less device)
2)メタマテリアル機能装置
3)インテリジェント反射板(Intelligent reflecting surface)
4)スマートリピータ(Smart repeater) Note that RIS may be the names shown in 1) to 4) below, but are not limited to these.
1) Battery less device
2) Metamaterial functional device 3) Intelligent reflecting surface
4) Smart repeater
RISは、所定の機能を有する装置であればよく、当該所定の機能は例えば以下に示される1)及び2)の少なくとも一つの機能であってもよい。
The RIS may be any device that has a predetermined function, and the predetermined function may be, for example, at least one of 1) and 2) shown below.
1)UE機能
基地局10から送信される信号の受信機能(例えば、DL信号、SSB、PDCCH、PDSCH、DM-RS、PT-RS、CSI-RS、RIS専用信号)。当該受信機能により、下記2)メタマテリアル機能に係る情報を受信してもよい。基地局10への信号の送信機能(例えば、UL信号、PRACH、PUCCH、PUSCH、DM-RS、PT-RS、SRS、RIS専用信号)。当該送信機能により、下記2)メタマテリアル機能に係る情報を送信してもよい。基地局10とのフレーム同期機能。 1) UE function A function of receiving signals transmitted from the base station 10 (for example, DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, RIS dedicated signals). Information related to the following 2) metamaterial function may be received by the receiving function. Functions for transmitting signals to the base station 10 (eg, UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals). Information related to the following 2) metamaterial function may be transmitted by the transmission function. A frame synchronization function with thebase station 10 .
基地局10から送信される信号の受信機能(例えば、DL信号、SSB、PDCCH、PDSCH、DM-RS、PT-RS、CSI-RS、RIS専用信号)。当該受信機能により、下記2)メタマテリアル機能に係る情報を受信してもよい。基地局10への信号の送信機能(例えば、UL信号、PRACH、PUCCH、PUSCH、DM-RS、PT-RS、SRS、RIS専用信号)。当該送信機能により、下記2)メタマテリアル機能に係る情報を送信してもよい。基地局10とのフレーム同期機能。 1) UE function A function of receiving signals transmitted from the base station 10 (for example, DL signals, SSB, PDCCH, PDSCH, DM-RS, PT-RS, CSI-RS, RIS dedicated signals). Information related to the following 2) metamaterial function may be received by the receiving function. Functions for transmitting signals to the base station 10 (eg, UL signals, PRACH, PUCCH, PUSCH, DM-RS, PT-RS, SRS, RIS dedicated signals). Information related to the following 2) metamaterial function may be transmitted by the transmission function. A frame synchronization function with the
2)メタマテリアル機能
基地局10又は端末20から送信された信号の反射機能(例えば、位相変更)。RISが有する複数の反射素子ごとに位相を変更して信号の反射を行ってもよいし、複数の反射素子で共通の位相変更を行って信号の反射を行ってもよい。ビーム制御に係る機能(例えば、TCI-state、QCLの制御に係る機能、ビームの選択適用、空間フィルタ/プリコーディングウェイトの選択適用)。基地局10又は端末20から送信された信号の電力変更機能(例えば、電力増幅)。RISが有する反射素子ごとに異なる電力変更を行ってもよいし、複数の反射素子で共通の電力変更を行ってもよい。 2) Metamaterial function A reflection function (eg phase change) of the signal transmitted from thebase station 10 or the terminal 20 . The signal may be reflected by changing the phase for each of the plurality of reflecting elements of the RIS, or the common phase may be changed by the plurality of reflecting elements to reflect the signal. Functions related to beam control (eg, TCI-state, functions related to QCL control, selective application of beams, selective application of spatial filters/precoding weights). power modification function (eg, power amplification) of the signal transmitted from the base station 10 or the terminal 20; A different power change may be performed for each reflecting element of the RIS, or a common power change may be performed for a plurality of reflecting elements.
基地局10又は端末20から送信された信号の反射機能(例えば、位相変更)。RISが有する複数の反射素子ごとに位相を変更して信号の反射を行ってもよいし、複数の反射素子で共通の位相変更を行って信号の反射を行ってもよい。ビーム制御に係る機能(例えば、TCI-state、QCLの制御に係る機能、ビームの選択適用、空間フィルタ/プリコーディングウェイトの選択適用)。基地局10又は端末20から送信された信号の電力変更機能(例えば、電力増幅)。RISが有する反射素子ごとに異なる電力変更を行ってもよいし、複数の反射素子で共通の電力変更を行ってもよい。 2) Metamaterial function A reflection function (eg phase change) of the signal transmitted from the
RISにおける「受信して送信」は、電波/信号を反射することを意味してもよい。以降では「基地局」、「端末」の用語を使用するが、これらに限定されず、通信装置に置換されてもよい。RISはスマートリピータ、中継機等に置換されてもよい。
"Receive and transmit" in RIS may mean reflecting radio waves/signals. Although the terms “base station” and “terminal” are used hereinafter, they are not limited to these terms and may be replaced by communication devices. The RIS may be replaced by a smart repeater, repeater, or the like.
例えば、RISは、以下1)-6)に示される想定で動作してもよい。
1)ネットワークオペレータがRISを設定する
2)RISは固定されており移動しない
3)RISは一つのみの基地局からの信号を中継する
4)制御信号の受信及び送信が可能
5)半二重複信で動作する
6)単一のRIS環境 For example, the RIS may operate under the assumptions shown in 1)-6) below.
1) The RIS is configured by the network operator 2) The RIS is fixed and does not move 3) The RIS relays signals from only one base station 4) Capable of receiving and transmitting control signals 5) Half-duplex 6) A single RIS environment that operates on
1)ネットワークオペレータがRISを設定する
2)RISは固定されており移動しない
3)RISは一つのみの基地局からの信号を中継する
4)制御信号の受信及び送信が可能
5)半二重複信で動作する
6)単一のRIS環境 For example, the RIS may operate under the assumptions shown in 1)-6) below.
1) The RIS is configured by the network operator 2) The RIS is fixed and does not move 3) The RIS relays signals from only one base station 4) Capable of receiving and transmitting control signals 5) Half-duplex 6) A single RIS environment that operates on
上述のように、無線通信ネットワークの通信エリアの柔軟かつ低コストな拡張を目的として、RIS、スマートリピータ等の活用が考えられる。RIS又はスマートリピータと、IABノードとの大きな差分として、IABノードはベースバンド信号処理を行うが、RIS又はスマートリピータはベースバンド処理を行わない。RIS又はスマートリピータの送信方向又は送信ビーム等の制御を行うため、基地局10と、RIS又はスマートリピータとの間で、接続が確立され、設定情報が予め定義されてもよい。
As described above, the use of RIS, smart repeaters, etc. can be considered for the purpose of flexible and low-cost expansion of the communication area of the wireless communication network. A significant difference between RIS or smart repeaters and IAB nodes is that IAB nodes perform baseband signal processing while RIS or smart repeaters do not. A connection may be established and configuration information may be predefined between the base station 10 and the RIS or smart repeater in order to control the transmission direction, transmission beam, etc. of the RIS or smart repeater.
ここで、端末20が、RIS又はスマートリピータ等の無線中継装置30を介した信号を用いて初期アクセスを行うとき、無線中継装置を介した信号に適応する初期アクセスに係る動作を規定する必要がある。
Here, when the terminal 20 performs initial access using a signal via the wireless relay device 30 such as a RIS or smart repeater, it is necessary to define the operation related to the initial access adapted to the signal via the wireless relay device. be.
そこで、RIS又はスマートリピータを介する初期アクセスに係る以下1)-3)に示される動作を可能としてもよい。なお、以下1)-3)は組み合わされて実行されてもよい。
Therefore, the following operations 1)-3) related to initial access via the RIS or smart repeater may be made possible. Note that the following 1) to 3) may be executed in combination.
1)SSBインデックスを拡張してもよい。RIS又はスマートリピータがセル内に設置される又は設置されない場合を想定して、SSBインデックスを拡張してもよいし、SSBインデックスに係る情報を、基地局10はRIS又はスマートリピータに通知してもよい。
1) The SSB index may be extended. Assuming that the RIS or smart repeater is installed or not installed in the cell, the SSB index may be extended, or the base station 10 may notify the RIS or smart repeater of information related to the SSB index. good.
2)基地局10とRIS又はスマートリピータとのDL時間同期をおこなってもよい。RIS又はスマートリピータは、送信パターン、反射パターン及びビームの切り替えタイミング等を基地局10と合致させるため、基地局10と時間同期をとってもよい。
2) DL time synchronization between the base station 10 and the RIS or smart repeater may be performed. The RIS or smart repeater may be time-synchronized with the base station 10 in order to match the transmission pattern, reflection pattern, beam switching timing, etc. with the base station 10 .
3)基地局10とRIS又はスマートリピータとのUL時間同期をおこなってもよい。RIS又はスマートリピータは、端末20の送信タイミングを考慮して、例えばULはDLに対してビーム切り替えタイミングを早めるため、UL切替時間に係る同期をとってもよい。
3) UL time synchronization between base station 10 and RIS or smart repeaters may be performed. The RIS or smart repeater may take into consideration the transmission timing of the terminal 20, for example, to advance the beam switching timing of the UL with respect to the DL, so that the UL switching time may be synchronized.
図9は、本発明の実施の形態における無線中継装置を介する信号の例を説明するための図である。図9に示されるように、基地局10は、既存のセル用に送信するSSBインデックス0-SSBインデックスXのSSBに加えて、RIS又はスマートリピータ用にSSBインデックスX+1-SSBインデックスYのSSBを送信してもよい。図9は、X=3、Y=7の例である。例えば、端末20Aが送受信する既存のセル用にSSBインデックス0からSSBインデックス3が割り当てられ、端末20Bが送受信するRIS又はスマートリピータ用にSSBインデックス4からSSBインデックス7が割り当てられてもよい。
FIG. 9 is a diagram for explaining an example of signals through the wireless relay device according to the embodiment of the present invention. As shown in FIG. 9, the base station 10 transmits SSBs with SSB index X+1-SSB index Y for RIS or smart repeater in addition to SSBs with SSB index 0-SSB index X transmitted for existing cells. You may FIG. 9 is an example of X=3 and Y=7. For example, SSB indexes 0 to 3 may be assigned to the existing cells transmitted and received by the terminal 20A, and SSB indexes 4 to 7 may be assigned to the RIS or smart repeaters transmitted and received by the terminal 20B.
RIS又はスマートリピータは、任意に設置される場合も想定される。設置される場合、設置されない場合、設置された後設置場所が変更される場合等が想定される。例えば、RIS又はスマートリピータが設置されない場合、SSBインデックスは、0からXで十分であるが、RIS又はスマートリピータが設置された場合、SSBインデックスは、X+1からYが必要となる。
RIS or smart repeaters may be installed arbitrarily. It may be installed, not installed, or the installation location may be changed after installation. For example, if no RIS or smart repeater is installed, the SSB index from 0 to X is sufficient, but if the RIS or smart repeater is installed, the SSB index from X+1 to Y is required.
基地局10に設定されるSSBインデックスは、以下1)-3)に示されるように設定されてもよい。
The SSB index set in the base station 10 may be set as shown in 1)-3) below.
1)インデックス0-Xと、インデックス(X+1)-Yが常に設定される。基地局10には、SSBインデックス0-X、(X+1)-Yが割り当てられており、インデックス(X+1)-Yは、RIS又はスマートリピータの有無により、送信可否が決定されてもよい。
1) Index 0-X and index (X+1)-Y are always set. SSB indexes 0-X and (X+1)-Y are assigned to the base station 10, and the index (X+1)-Y may be determined whether transmission is possible depending on the presence or absence of a RIS or smart repeater.
例えば、RIS又はスマートリピータと基地局10との間に制御用の接続が存在する場合、RIS又はスマートリピータと接続が確立された(例えばランダムアクセス手順完了又はRRC接続確立等)時点で、基地局10は、インデックス(X+1)-Yに対応するSSBのビームを送信開始してもよい。
For example, if there is a connection for control between the RIS or smart repeater and the base station 10, the base station 10 may start transmitting the beam of the SSB corresponding to index (X+1)-Y.
RIS又はスマートリピータは、基地局10と接続するとき、能力として、自装置の送信パターン、反射パターン及びビーム数の少なくとも一つを基地局10に報告してもよい。基地局10は、RIS又はスマートリピータの報告数に基づいて、SSBを割り当ててもよい。例えば、基地局10は、RIS又はスマートリピータの報告数だけ、SSBを追加で割り当ててもよい。基地局10は、割り当てるSSB数及び/又はSSBインデックスを明示的にRIS又はスマートリピータに通知してもよいし、例えば、インデックス(X+1)-YのSSBがデコードされることで暗黙的にRIS又はスマートリピータに通知してもよい。
When connecting to the base station 10, the RIS or smart repeater may report at least one of its own transmission pattern, reflection pattern, and number of beams to the base station 10 as capabilities. The base station 10 may allocate SSBs based on RIS or smart repeater reporting numbers. For example, the base station 10 may additionally allocate SSBs by the number of RIS or smart repeater reports. The base station 10 may explicitly notify the RIS or smart repeater of the number of SSBs to be allocated and/or the SSB index. A smart repeater may be notified.
RIS又はスマートリピータの送信パターン、反射パターン及び/又はビーム数の最大値(例えば、4又は8等)が、仕様で規定されてもよいし、設定されてもよいし、予め設定されてもよい。
The transmission pattern, reflection pattern and/or maximum number of beams (e.g., 4 or 8, etc.) of the RIS or smart repeater may be specified, set, or preset. .
2)インデックス0-Xが常に設定され、インデックス(X+1)-YはRIS又はスマートリピータの存在有無に基づいて追加されてもよい。基地局10には、SSBインデックス0-Xが割り当てられており、SSBインデックス(X+1)-YはRIS又はスマートリピータの有無に応じて追加されてもよい。例えば、PBCH等にSSBインデックス(X+1)-Yを有効化又は無効化するフラグビットを設けてもよい。当該フラグビットが無効を示す場合、端末20は、SSBインデックスは0-Xと判定し、当該フラグビットが有効を示す場合、端末20は、SSBインデックスは0-Xにαが追加されると判定してもよい。当該αは、仕様で規定されてもよいし、別途通知されてもよい。例えば、当該αは、SSBインデックス(X+1)-Yであってもよい。
2) Indexes 0-X are always set, and indexes (X+1)-Y may be added based on the presence or absence of a RIS or smart repeater. The base station 10 is assigned SSB indices 0-X, and SSB indices (X+1)-Y may be added depending on the presence or absence of RIS or smart repeaters. For example, a flag bit for enabling or disabling the SSB index (X+1)-Y may be provided in the PBCH or the like. If the flag bit indicates invalid, terminal 20 determines that the SSB index is 0-X, and if the flag bit indicates valid, terminal 20 determines that α is added to SSB index 0-X. You may The α may be specified in the specification or notified separately. For example, the α may be the SSB index (X+1)-Y.
3)インデックス0-Xとインデックス(X+1)が常に設定されてもよい。RIS又はスマートリピータが、ワイドビームとナロービームが同時に送信可能である場合、RIS又はスマートリピータは、一つのSSBインデックス(例えばX+1)に対応するSSBを、一つのワイドビームで反射又は再放射してもよい。例えば、RIS又はスマートリピータは、PBCH及びSIBをデコードし、SSBの送信周期及びタイミングを取得してもよい。
3) Index 0-X and index (X+1) may always be set. When the RIS or smart repeater can transmit a wide beam and a narrow beam at the same time, the RIS or smart repeater reflects or re-radiates the SSB corresponding to one SSB index (eg, X+1) with one wide beam. good too. For example, a RIS or smart repeater may decode the PBCH and SIB to obtain the transmission period and timing of the SSB.
さらに、RIS又はスマートリピータは、複数のCSI-RSが割り当てられ、複数のナロービームで反射又は再放射してもよい。RIS又はスマートリピータは、基地局10と接続するとき、能力として、自装置の送信パターン、反射パターン及びビーム数の少なくとも一つを基地局10に報告してもよい。基地局10は、RIS又はスマートリピータの報告に基づいて、CSI-RSを割り当ててもよい。基地局10は、割り当てるCSI-RSに係る情報(例えば時間リソース及び/又は周波数リソース)をRIS又はスマートリピータに通知してもよい。なお、上記複数のナロービームの方向は、上記ワイドビームの方向に含まれてもよい。
Furthermore, a RIS or smart repeater may be assigned multiple CSI-RSs and reflect or re-radiate with multiple narrow beams. When connecting to the base station 10, the RIS or smart repeater may report at least one of its own transmission pattern, reflection pattern, and beam number to the base station 10 as its capability. Base station 10 may allocate CSI-RS based on RIS or smart repeater reports. The base station 10 may notify the RIS or smart repeater of information (for example, time resource and/or frequency resource) regarding the CSI-RS to be allocated. The directions of the plurality of narrow beams may be included in the directions of the wide beams.
他の例として、RIS又はスマートリピータが、ワイドビームとナロービームのいずれか一方のみ送信可能である場合、RIS又はスマートリピータは、一つのSSBインデックス(例えばX+1)に対応するSSBを複数のナロービームで反射又は再放射してもよい。ここで、例えば、RIS又はスマートリピータが4つのナロービームで反射又は再放射する場合、RIS又はスマートリピータを介した場合のSSB送信周期は4倍となる。なお、RIS又はスマートリピータが、ワイドビームとナロービームのいずれか一方のみ送信可能である場合、RIS又はスマートリピータは、一つのSSBインデックス(例えばX+1)に対応するSSBを、一つのワイドビームで反射又は再放射してもよい。なお、上記複数のナロービームの方向は、上記ワイドビームの方向に含まれてもよい。
As another example, if the RIS or smart repeater can transmit only one of wide beams and narrow beams, the RIS or smart repeater transmits SSBs corresponding to one SSB index (eg, X+1) to multiple narrow beams. may be reflected or re-radiated by Here, for example, if a RIS or smart repeater reflects or re-radiates with four narrow beams, the SSB transmission period through the RIS or smart repeater is quadrupled. If the RIS or smart repeater can transmit only one of the wide beam and the narrow beam, the RIS or smart repeater reflects the SSB corresponding to one SSB index (for example, X+1) with one wide beam. or may be re-radiated. The directions of the plurality of narrow beams may be included in the directions of the wide beams.
上述した1)-3)に示される動作において、j既存のセルに対するビームと、RIS又はスマートリピータ向けのビームの合計数が、既存のSSBインデックスの最大値(FR1では8、FR2では64)を超過する場合、SSBインデックスを拡張してもよい。
In the operations shown in 1)-3) above, the total number of beams for existing cells and beams for RIS or smart repeaters exceeds the maximum existing SSB index (8 for FR1 and 64 for FR2). If exceeded, the SSB index may be extended.
例えば、PBCHのMIBの予約ビットの1ビットを使用してSSBインデックスを拡張してもよい。また、上記2)に示される動作の場合、RIS又はスマートリピータ向けSSBインデックスを有効化するビットを利用して、SSBインデックスを拡張してもよい。例えば、当該有効化又は無効化を示すビットが0の場合、SSBインデックスを既存のセルに割り当て、端末20は既存のセルのSSBインデックスのみ探査してもよく、当該有効化又は無効化を示すビットが1の場合、拡張されたSSBインデックスをRISに割り当て、端末20は既存のセルのSSBインデックスに加えてRIS又はスマートリピータで反射又は再放射されるSSBインデックスを探査してもよい。
For example, one reserved bit of the PBCH MIB may be used to extend the SSB index. Also, in the case of the operation shown in 2) above, the SSB index may be extended using the RIS or the bit enabling the SSB index for smart repeaters. For example, if the bit indicating activation or deactivation is 0, the SSB index is assigned to the existing cell, the terminal 20 may search only the SSB index of the existing cell, and the bit indicating activation or deactivation is is 1, assign the extended SSB index to the RIS, and the terminal 20 may probe for the SSB index reflected or re-radiated at the RIS or smart repeater in addition to the existing cell SSB index.
基地局10と、RIS又はスマートリピータとのDL時間同期は、以下のように実行されてもよい。
DL time synchronization between the base station 10 and the RIS or smart repeater may be performed as follows.
RIS又はスマートリピータは、送信パターン、反射パターン及び/又はビームの切り替えタイミングを基地局10と合わせるために、外部ソースを用いて時間同期してもよいし、SSBを用いて時間同期してもよい。当該外部ソースは、例えば、GNSS(Global Navigation Satellite System)であってもよいし、PTP(Precision Time Protocol)であってもよい。SSBを用いて時間同期する場合、基地局10とRIS又はスマートリピータ間の伝播遅延差は許容されてもよい。また、SSBを用いて時間同期する場合、RIS又はスマートリピータはTA(Timing Advance)等のタイミングに係る情報を通知され、当該情報に基づいて伝播遅延を補正してもよいし、基地局10及びRIS又はスマートリピータの位置情報等に基づいて伝播遅延を推定してもよい。
The RIS or smart repeater may be time synchronized using an external source or using SSB to align the transmission pattern, reflection pattern and/or beam switching timing with the base station 10. . The external source may be, for example, GNSS (Global Navigation Satellite System) or PTP (Precision Time Protocol). When using SSB for time synchronization, propagation delay differences between the base station 10 and the RIS or smart repeater may be allowed. Further, when time synchronization is performed using SSB, the RIS or smart repeater is notified of information related to timing such as TA (Timing Advance), and may correct the propagation delay based on the information, or the base station 10 and Propagation delay may be estimated based on location information of the RIS or smart repeaters, or the like.
基地局10と、RIS又はスマートリピータとのUL時間同期は、以下のように実行されてもよい。
UL time synchronization between the base station 10 and the RIS or smart repeater may be performed as follows.
RIS又はスマートリピータは、基地局10とDL時間同期をとる必要があると同時に、端末20の送信タイミングを考慮して、ULのビーム切り替えタイミングをDLのビーム切り替えタイミングに対して早くする必要がある。
The RIS or smart repeater needs to achieve DL time synchronization with the base station 10, and at the same time, considering the transmission timing of the terminal 20, it is necessary to make the UL beam switching timing earlier than the DL beam switching timing. .
例えば、基地局10とRIS又はスマートリピータの位置及び伝播パスが同一であり、タイミングが常に一定の場合、RIS又はスマートリピータは、TDDパターンを認識し、ULスロットはビーム切り替えタイミングを早くしてもよい。例えば、スペシャルスロットのフレキシブルシンボルのタイミングで、ビーム切り替えタイミングを早くしてもよい。当該TDDパターンは、基地局10から通知されてもよいし、事前に設定されてもよいし、仕様に規定されてもよい。例えば、ULのパターン及び/又はビームを切り替えるタイミングは、RIS又はスマートリピータによる伝搬遅延に応じたタイミングとしてもよいし、RIS又はスマートリピータが基地局10から設定されるTAに応じたタイミングとしてもよいし、基地局10又は端末20からタイミングに係る情報が通知されてもよい。
For example, if the base station 10 and the RIS or smart repeater have the same position and propagation path, and the timing is always constant, the RIS or smart repeater recognizes the TDD pattern, and the UL slot advances the beam switching timing. good. For example, the beam switching timing may be advanced at the timing of the flexible symbol of the special slot. The TDD pattern may be notified from the base station 10, set in advance, or defined in the specification. For example, the timing for switching the UL pattern and/or beam may be timing according to the propagation delay by the RIS or smart repeater, or may be timing according to the TA set by the RIS or smart repeater from the base station 10. However, the base station 10 or the terminal 20 may notify the timing information.
例えば、基地局10とRIS又はスマートリピータの位置及び伝播パスに変動が生じ、タイミングが変化する場合、基地局10とRIS又はスマートリピータ間の伝播パスの変動に応じてタイミングを変動させてもよい。例えば、ULのパターン及び/又はビームを切り替えるタイミングは、RIS又はスマートリピータが基地局10から設定されるTAに応じて動的に切り替えるタイミングとしてもよいし、基地局10又は端末20からタイミングに係る情報が通知されてもよい。
For example, when the position and propagation path between the base station 10 and the RIS or smart repeater fluctuate and the timing changes, the timing may fluctuate according to the propagation path fluctuation between the base station 10 and the RIS or smart repeater. . For example, the timing of switching UL patterns and / or beams may be the timing of dynamic switching according to the TA set by the RIS or smart repeater from the base station 10, or the timing from the base station 10 or the terminal 20 Information may be notified.
上述の実施例により、基地局10及び端末20は、RIS又はスマートリピータを介した初期アクセスの信頼性を向上させることができる。
According to the above embodiment, the base station 10 and terminal 20 can improve the reliability of initial access via RIS or smart repeaters.
すなわち、無線通信システムにおいて、無線中継装置を介した初期アクセスの信頼性を向上させることができる。
That is, in a wireless communication system, it is possible to improve the reliability of initial access via a wireless relay device.
(ハードウェア構成)
上記実施形態の説明に用いたブロック図(図2、図3及び図4)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。 (Hardware configuration)
The block diagrams (FIGS. 2, 3 and 4) used to describe the above embodiments show blocks in units of functions. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, 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.
上記実施形態の説明に用いたブロック図(図2、図3及び図4)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。 (Hardware configuration)
The block diagrams (FIGS. 2, 3 and 4) used to describe the above embodiments show blocks in units of functions. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, 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.
機能には、判断、決定、判定、計算、算出、処理、導出、調査、探索、確認、受信、送信、出力、アクセス、解決、選択、選定、確立、比較、想定、期待、見做し、報知(broadcasting)、通知(notifying)、通信(communicating)、転送(forwarding)、構成(configuring)、再構成(reconfiguring)、割り当て(allocating、mapping)、割り振り(assigning)などがあるが、これらに限られない。たとえば、送信を機能させる機能ブロック(構成部)は、送信部(transmitting unit)あるいは送信機(transmitter)と呼称される。いずれも、上述したとおり、実現方法は特に限定されない。
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 For example, a functional block (component) responsible for transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.
例えば、本開示の一実施の形態における基地局10、端末20及び無線中継装置30等は、本開示の無線通信方法の処理を行うコンピュータとして機能してもよい。図10は、本開示の一実施の形態に係る基地局10、端末20及び無線中継装置30のハードウェア構成の一例を示す図である。上述の基地局10、端末20及び無線中継装置30は、物理的には、プロセッサ1001、記憶装置1002、補助記憶装置1003、通信装置1004、入力装置1005、出力装置1006、バス1007などを含むコンピュータ装置として構成されてもよい。
For example, the base station 10, the terminal 20, the wireless relay device 30, and the like according to the embodiment of the present disclosure may function as computers that perform processing of the wireless communication method of the present disclosure. FIG. 10 is a diagram illustrating an example of hardware configurations of the base station 10, terminal 20, and radio relay device 30 according to an embodiment of the present disclosure. The base station 10, the terminal 20, and the wireless relay device 30 described above are physically computers 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. It may be configured as a device.
なお、以下の説明では、「装置」という文言は、回路、デバイス、ユニット等に読み替えることができる。基地局10、端末20及び無線中継装置30のハードウェア構成は、図に示した各装置を1つ又は複数含むように構成されてもよいし、一部の装置を含まずに構成されてもよい。
In the following explanation, the term "apparatus" can be read as a circuit, device, unit, or the like. The hardware configuration of the base station 10, the terminal 20, and the radio relay device 30 may be configured to include one or more of each device shown in the figure, or may be configured without some devices. good.
基地局10、端末20及び無線中継装置30における各機能は、プロセッサ1001、記憶装置1002等のハードウェア上に所定のソフトウェア(プログラム)を読み込ませることによって、プロセッサ1001が演算を行い、通信装置1004による通信を制御したり、記憶装置1002及び補助記憶装置1003におけるデータの読み出し及び書き込みの少なくとも一方を制御したりすることによって実現される。
Each function of the base station 10, the terminal 20, and the radio relay device 30 is performed by the processor 1001 by loading predetermined software (program) onto hardware such as the processor 1001 and the storage device 1002, and the communication device 1004. It is realized by controlling communication via the storage device 1002 and controlling at least one of data reading and writing in the storage device 1002 and the auxiliary storage device 1003 .
プロセッサ1001は、例えば、オペレーティングシステムを動作させてコンピュータ全体を制御する。プロセッサ1001は、周辺装置とのインターフェース、制御装置、演算装置、レジスタ等を含む中央処理装置(CPU:Central Processing Unit)で構成されてもよい。例えば、上述の制御部140、制御部240等は、プロセッサ1001によって実現されてもよい。
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. For example, the control unit 140 , the control unit 240 and the like described above may be implemented by the processor 1001 .
また、プロセッサ1001は、プログラム(プログラムコード)、ソフトウェアモジュール又はデータ等を、補助記憶装置1003及び通信装置1004の少なくとも一方から記憶装置1002に読み出し、これらに従って各種の処理を実行する。プログラムとしては、上述の実施の形態において説明した動作の少なくとも一部をコンピュータに実行させるプログラムが用いられる。例えば、図2に示した基地局10の制御部140は、記憶装置1002に格納され、プロセッサ1001で動作する制御プログラムによって実現されてもよい。また、例えば、図3に示した端末20の制御部240は、記憶装置1002に格納され、プロセッサ1001で動作する制御プログラムによって実現されてもよい。上述の各種処理は、1つのプロセッサ1001によって実行される旨を説明してきたが、2以上のプロセッサ1001により同時又は逐次に実行されてもよい。プロセッサ1001は、1以上のチップによって実装されてもよい。なお、プログラムは、電気通信回線を介してネットワークから送信されてもよい。
In addition, 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. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, control unit 140 of base station 10 shown in FIG. 2 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 . Also, for example, the control unit 240 of the terminal 20 shown in FIG. Although it has been explained that the above-described various processes are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 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.
記憶装置1002は、コンピュータ読み取り可能な記録媒体であり、例えば、ROM(Read Only Memory)、EPROM(Erasable Programmable ROM)、EEPROM(Electrically Erasable Programmable ROM)、RAM(Random Access Memory)等の少なくとも1つによって構成されてもよい。記憶装置1002は、レジスタ、キャッシュ、メインメモリ(主記憶装置)等と呼ばれてもよい。記憶装置1002は、本開示の一実施の形態に係る通信方法を実施するために実行可能なプログラム(プログラムコード)、ソフトウェアモジュール等を保存することができる。
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.
補助記憶装置1003は、コンピュータ読み取り可能な記録媒体であり、例えば、CD-ROM(Compact Disc ROM)等の光ディスク、ハードディスクドライブ、フレキシブルディスク、光磁気ディスク(例えば、コンパクトディスク、デジタル多用途ディスク、Blu-ray(登録商標)ディスク)、スマートカード、フラッシュメモリ(例えば、カード、スティック、キードライブ)、フロッピー(登録商標)ディスク、磁気ストリップ等の少なくとも1つによって構成されてもよい。上述の記憶媒体は、例えば、記憶装置1002及び補助記憶装置1003の少なくとも一方を含むデータベース、サーバその他の適切な媒体であってもよい。
The auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, 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 .
通信装置1004は、有線ネットワーク及び無線ネットワークの少なくとも一方を介してコンピュータ間の通信を行うためのハードウェア(送受信デバイス)であり、例えばネットワークデバイス、ネットワークコントローラ、ネットワークカード、通信モジュールなどともいう。通信装置1004は、例えば周波数分割複信(FDD:Frequency Division Duplex)及び時分割複信(TDD:Time Division Duplex)の少なくとも一方を実現するために、高周波スイッチ、デュプレクサ、フィルタ、周波数シンセサイザなどを含んで構成されてもよい。例えば、送受信アンテナ、アンプ部、送受信部、伝送路インターフェース等は、通信装置1004によって実現されてもよい。送受信部は、送信部と受信部とで、物理的に、または論理的に分離された実装がなされてもよい。
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). may consist of For example, a transmitting/receiving antenna, an amplifier section, a transmitting/receiving section, a transmission path interface, etc. may be implemented by the communication device 1004 . The transceiver may be physically or logically separate implementations for the transmitter and receiver.
入力装置1005は、外部からの入力を受け付ける入力デバイス(例えば、キーボード、マウス、マイクロフォン、スイッチ、ボタン、センサ等)である。出力装置1006は、外部への出力を実施する出力デバイス(例えば、ディスプレイ、スピーカー、LEDランプ等)である。なお、入力装置1005及び出力装置1006は、一体となった構成(例えば、タッチパネル)であってもよい。
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).
また、プロセッサ1001及び記憶装置1002等の各装置は、情報を通信するためのバス1007によって接続される。バス1007は、単一のバスを用いて構成されてもよいし、装置間ごとに異なるバスを用いて構成されてもよい。
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.
また、基地局10、端末20及び無線中継装置30は、マイクロプロセッサ、デジタル信号プロセッサ(DSP:Digital Signal Processor)、ASIC(Application Specific Integrated Circuit)、PLD(Programmable Logic Device)、FPGA(Field Programmable Gate Array)等のハードウェアを含んで構成されてもよく、当該ハードウェアにより、各機能ブロックの一部又は全てが実現されてもよい。例えば、プロセッサ1001は、これらのハードウェアの少なくとも1つを用いて実装されてもよい。
In addition, the base station 10, the terminal 20 and the radio relay device 30 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable le Gate Array ), etc., and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.
さらに、無線中継装置30は、可変部340及びアンテナ部350を構成するハードウェアとして、可変位相器、移相器、アンプ、アンテナ、アレイアンテナ等を必要に応じて有してもよい。
Further, the radio relay device 30 may have a variable phase shifter, a phase shifter, an amplifier, an antenna, an array antenna, etc., as hardware constituting the variable section 340 and the antenna section 350, if necessary.
図11に車両2001の構成例を示す。図11に示すように、車両2001は駆動部2002、操舵部2003、アクセルペダル2004、ブレーキペダル2005、シフトレバー2006、前輪2007、後輪2008、車軸2009、電子制御部2010、各種センサ2021~2029、情報サービス部2012と通信モジュール2013を備える。本開示において説明した各態様/実施形態は、車両2001に搭載される通信装置に適用されてもよく、例えば、通信モジュール2013に適用されてもよい。
A configuration example of the vehicle 2001 is shown in FIG. As shown in FIG. 11, 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 . Each aspect/embodiment described in the present disclosure may be applied to a communication device mounted on vehicle 2001, and may be applied to communication module 2013, for example.
駆動部2002は例えば、エンジン、モータ、エンジンとモータのハイブリッドで構成される。操舵部2003は、少なくともステアリングホイール(ハンドルとも呼ぶ)を含み、ユーザによって操作されるステアリングホイールの操作に基づいて前輪及び後輪の少なくとも一方を操舵するように構成される。
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.
電子制御部2010は、マイクロプロセッサ2031、メモリ(ROM、RAM)2032、通信ポート(IOポート)2033で構成される。電子制御部2010には、車両2001に備えられた各種センサ2021~2029からの信号が入力される。電子制御部2010は、ECU(Electronic Control Unit)と呼んでも良い。
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).
各種センサ2021~2029からの信号としては、モータの電流をセンシングする電流センサ2021からの電流信号、回転数センサ2022によって取得された前輪や後輪の回転数信号、空気圧センサ2023によって取得された前輪や後輪の空気圧信号、車速センサ2024によって取得された車速信号、加速度センサ2025によって取得された加速度信号、アクセルペダルセンサ2029によって取得されたアクセルペダルの踏み込み量信号、ブレーキペダルセンサ2026によって取得されたブレーキペダルの踏み込み量信号、シフトレバーセンサ2027によって取得されたシフトレバーの操作信号、物体検知センサ2028によって取得された障害物、車両、歩行者等を検出するための検出信号等がある。
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.
情報サービス部2012は、カーナビゲーションシステム、オーディオシステム、スピーカ、テレビ、ラジオといった、運転情報、交通情報、エンターテイメント情報等の各種情報を提供するための各種機器と、これらの機器を制御する1つ以上のECUとから構成される。情報サービス部2012は、外部装置から通信モジュール2013等を介して取得した情報を利用して、車両2001の乗員に各種マルチメディア情報及びマルチメディアサービスを提供する。
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.
運転支援システム部2030は、ミリ波レーダ、LiDAR(Light Detection and Ranging)、カメラ、測位ロケータ(例えば、GNSS等)、地図情報(例えば、高精細(HD)マップ、自動運転車(AV)マップ等)、ジャイロシステム(例えば、IMU(Inertial Measurement Unit)、INS(Inertial Navigation System)等)、AI(Artificial Intelligence)チップ、AIプロセッサといった、事故を未然に防止したりドライバの運転負荷を軽減したりするための機能を提供するための各種機器と、これらの機器を制御する1つ以上のECUとから構成される。また、運転支援システム部2030は、通信モジュール2013を介して各種情報を送受信し、運転支援機能又は自動運転機能を実現する。
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. In addition, 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.
通信モジュール2013は通信ポートを介して、マイクロプロセッサ2031および車両2001の構成要素と通信することができる。例えば、通信モジュール2013は通信ポート2033を介して、車両2001に備えられた駆動部2002、操舵部2003、アクセルペダル2004、ブレーキペダル2005、シフトレバー2006、前輪2007、後輪2008、車軸2009、電子制御部2010内のマイクロプロセッサ2031及びメモリ(ROM、RAM)2032、センサ2021~29との間でデータを送受信する。
The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via communication ports. For example, 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.
通信モジュール2013は、電子制御部2010のマイクロプロセッサ2031によって制御可能であり、外部装置と通信を行うことが可能な通信デバイスである。例えば、外部装置との間で無線通信を介して各種情報の送受信を行う。通信モジュール2013は、電子制御部2010の内部と外部のどちらにあってもよい。外部装置は、例えば、基地局、移動局等であってもよい。
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.
通信モジュール2013は、電子制御部2010に入力された電流センサからの電流信号を、無線通信を介して外部装置へ送信する。また、通信モジュール2013は、電子制御部2010に入力された、回転数センサ2022によって取得された前輪や後輪の回転数信号、空気圧センサ2023によって取得された前輪や後輪の空気圧信号、車速センサ2024によって取得された車速信号、加速度センサ2025によって取得された加速度信号、アクセルペダルセンサ2029によって取得されたアクセルペダルの踏み込み量信号、ブレーキペダルセンサ2026によって取得されたブレーキペダルの踏み込み量信号、シフトレバーセンサ2027によって取得されたシフトレバーの操作信号、物体検知センサ2028によって取得された障害物、車両、歩行者等を検出するための検出信号等についても無線通信を介して外部装置へ送信する。
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. In addition, 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.
通信モジュール2013は、外部装置から送信されてきた種々の情報(交通情報、信号情報、車間情報等)を受信し、車両2001に備えられた情報サービス部2012へ表示する。また、通信モジュール2013は、外部装置から受信した種々の情報をマイクロプロセッサ2031によって利用可能なメモリ2032へ記憶する。メモリ2032に記憶された情報に基づいて、マイクロプロセッサ2031が車両2001に備えられた駆動部2002、操舵部2003、アクセルペダル2004、ブレーキペダル2005、シフトレバー2006、前輪2007、後輪2008、車軸2009、センサ2021~2029等の制御を行ってもよい。
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 . Based on the information stored in the memory 2032, 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.
(実施の形態のまとめ)
以上、説明したように、本発明の実施の形態によれば、同期信号及び報知情報を含みインデックスに関連付けられる信号を、複数送信する送信部と、前記信号の送信に係る動作を制御する制御部とを有し、前記制御部は、無線中継装置が存在する場合、前記インデックスに関連付けられる前記信号を追加する基地局が提供される。 (Summary of embodiment)
As described above, according to the embodiments of the present invention, a transmission unit that transmits a plurality of signals associated with an index including synchronization signals and notification information, and a control unit that controls operations related to transmission of the signals and said control unit is provided with a base station adding said signal associated with said index if a radio repeater is present.
以上、説明したように、本発明の実施の形態によれば、同期信号及び報知情報を含みインデックスに関連付けられる信号を、複数送信する送信部と、前記信号の送信に係る動作を制御する制御部とを有し、前記制御部は、無線中継装置が存在する場合、前記インデックスに関連付けられる前記信号を追加する基地局が提供される。 (Summary of embodiment)
As described above, according to the embodiments of the present invention, a transmission unit that transmits a plurality of signals associated with an index including synchronization signals and notification information, and a control unit that controls operations related to transmission of the signals and said control unit is provided with a base station adding said signal associated with said index if a radio repeater is present.
上記の構成により、基地局10及び端末20は、RIS又はスマートリピータを介した初期アクセスの信頼性を向上させることができる。すなわち、無線通信システムにおいて、無線中継装置を介した初期アクセスの信頼性を向上させることができる。
With the above configuration, the base station 10 and terminal 20 can improve the reliability of initial access via RIS or smart repeaters. That is, in a wireless communication system, it is possible to improve the reliability of initial access via a wireless relay device.
無線中継装置から報告を受信する受信部をさらに有し、前記受信部が前記報告を受信した数だけ、前記制御部は、前記インデックスに関連付けられる前記信号を追加してもよい。当該構成により、基地局10及び端末20は、RIS又はスマートリピータを介した初期アクセスの信頼性を向上させることができる。
The controller may further include a receiver that receives reports from the wireless relay device, and the controller may add the signals associated with the index by the number of reports received by the receiver. With this configuration, the base station 10 and terminal 20 can improve the reliability of initial access via the RIS or smart repeater.
前記制御部は、無線中継装置が存在する場合、前記インデックスに関連付けられる前記信号を一つ追加し、前記追加された前記信号に第1のビームを適用し、さらに、無線中継装置に複数の第2のビームがそれぞれ適用される複数のCSI-RS(Channel State Information - Reference Signal)を割り当ててもよい。当該構成により、基地局10及び端末20は、RIS又はスマートリピータを介した初期アクセスの信頼性を向上させることができる。
The controller adds one of the signals associated with the index, applies a first beam to the added signal, and a plurality of second A plurality of CSI-RSs (Channel State Information-Reference Signals) to which two beams are respectively applied may be assigned. With this configuration, the base station 10 and terminal 20 can improve the reliability of initial access via the RIS or smart repeater.
前記制御部は、無線中継装置と、下りリンクに係る時間の同期を行い、前記信号に適用するビームの切り替えタイミングを決定してもよい。当該構成により、基地局10及び端末20は、RIS又はスマートリピータを介した初期アクセスの信頼性を向上させることができる。
The control unit may perform downlink time synchronization with the radio relay apparatus, and determine beam switching timing to be applied to the signal. With this configuration, the base station 10 and terminal 20 can improve the reliability of initial access via the RIS or smart repeater.
前記制御部は、無線中継装置と、上りリンクに係る時間の同期を行い、下りリンクに対して上りリンクに適用するビームの切り替えタイミングを早くしてもよい。当該構成により、基地局10及び端末20は、RIS又はスマートリピータを介した初期アクセスの信頼性を向上させることができる。
The control unit may synchronize the time related to the uplink with the radio relay apparatus, and advance the beam switching timing applied to the uplink with respect to the downlink. With this configuration, the base station 10 and terminal 20 can improve the reliability of initial access via the RIS or smart repeater.
また、本発明の実施の形態によれば、同期信号及び報知情報を含みインデックスに関連付けられる信号を、複数送信する送信手順と、前記信号の送信に係る動作を制御する制御手順と、無線中継装置が存在する場合、追加された前記インデックスに関連付けらえる前記信号を送信する手順とを基地局が実行する通信方法が提供される。
Further, according to the embodiment of the present invention, a transmission procedure for transmitting a plurality of signals associated with an index including synchronization signals and notification information, a control procedure for controlling operations related to the transmission of the signals, and a radio relay device is present, a communication method is provided in which a base station performs a step of transmitting said signal associated with said added index.
上記の構成により、基地局10及び端末20は、RIS又はスマートリピータを介した初期アクセスの信頼性を向上させることができる。すなわち、無線通信システムにおいて、無線中継装置を介した初期アクセスの信頼性を向上させることができる。
With the above configuration, the base station 10 and terminal 20 can improve the reliability of initial access via RIS or smart repeaters. That is, in a wireless communication system, it is possible to improve the reliability of initial access via a wireless relay device.
(実施形態の補足)
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。 (Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, replacements, and the like. be. Although specific numerical examples have been used to facilitate understanding of the invention, these numerical values are merely examples and any appropriate values may be used unless otherwise specified. The division of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. may apply (unless inconsistent) to the matters set forth in Boundaries of functional or processing units in functional block diagrams do not necessarily correspond to boundaries of physical components. 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. As for the processing procedures described in the embodiments, the processing order may be changed as long as there is no contradiction. Although thebase 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.
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。 (Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, replacements, and the like. be. Although specific numerical examples have been used to facilitate understanding of the invention, these numerical values are merely examples and any appropriate values may be used unless otherwise specified. The division of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. may apply (unless inconsistent) to the matters set forth in Boundaries of functional or processing units in functional block diagrams do not necessarily correspond to boundaries of physical components. 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. As for the processing procedures described in the embodiments, the processing order may be changed as long as there is no contradiction. Although the
また、情報の通知は、本開示で説明した態様/実施形態に限られず、他の方法を用いて行われてもよい。例えば、情報の通知は、物理レイヤシグナリング(例えば、DCI(Downlink Control Information)、UCI(Uplink Control Information))、上位レイヤシグナリング(例えば、RRC(Radio Resource Control)シグナリング、MAC(Medium Access Control)シグナリング、報知情報(MIB(Master Information Block)、SIB(System Information Block))、その他の信号又はこれらの組み合わせによって実施されてもよい。また、RRCシグナリングは、RRCメッセージと呼ばれてもよく、例えば、RRC接続セットアップ(RRC Connection Setup)メッセージ、RRC接続再構成(RRC Connection Reconfiguration)メッセージ等であってもよい。
Also, notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods. For example, 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.In addition, 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.
本開示において説明した各態様/実施形態は、LTE(Long Term Evolution)、LTE-A(LTE-Advanced)、SUPER 3G、IMT-Advanced、4G(4th generation mobile communication system)、5G(5th generation mobile communication system)、6th generation mobile communication system(6G)、xth generation mobile communication system(xG)(xG(xは、例えば整数、小数))、FRA(Future Radio Access)、NR(new Radio)、New radio access(NX)、Future generation radio access(FX)、W-CDMA(登録商標)、GSM(登録商標)、CDMA2000、UMB(Ultra Mobile Broadband)、IEEE 802.11(Wi-Fi(登録商標))、IEEE 802.16(WiMAX(登録商標))、IEEE 802.20、UWB(Ultra-WideBand)、Bluetooth(登録商標)、その他の適切なシステムを利用するシステム及びこれらに基づいて拡張、修正、作成、規定された次世代システムの少なくとも一つに適用されてもよい。また、複数のシステムが組み合わされて(例えば、LTE及びLTE-Aの少なくとも一方と5Gとの組み合わせ等)適用されてもよい。
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 at least one of the next generation systems. Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).
本明細書で説明した各態様/実施形態の処理手順、シーケンス、フローチャート等は、矛盾の無い限り、順序を入れ替えてもよい。例えば、本開示において説明した方法については、例示的な順序を用いて様々なステップの要素を提示しており、提示した特定の順序に限定されない。
The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this specification may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.
本明細書において基地局10によって行われるとした特定動作は、場合によってはその上位ノード(upper node)によって行われることもある。基地局10を有する1つ又は複数のネットワークノード(network nodes)からなるネットワークにおいて、端末20との通信のために行われる様々な動作は、基地局10及び基地局10以外の他のネットワークノード(例えば、MME又はS-GW等が考えられるが、これらに限られない)の少なくとも1つによって行われ得ることは明らかである。上記において基地局10以外の他のネットワークノードが1つである場合を例示したが、他のネットワークノードは、複数の他のネットワークノードの組み合わせ(例えば、MME及びS-GW)であってもよい。
A specific operation performed by the base station 10 in this specification may be performed by its upper node in some cases. In a network consisting of one or more network nodes with base station 10, 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). Although the case where there is one network node other than the base station 10 is illustrated above, the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). .
本開示において説明した情報又は信号等は、上位レイヤ(又は下位レイヤ)から下位レイヤ(又は上位レイヤ)へ出力され得る。複数のネットワークノードを介して入出力されてもよい。
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.
入出力された情報等は特定の場所(例えば、メモリ)に保存されてもよいし、管理テーブルを用いて管理してもよい。入出力される情報等は、上書き、更新、又は追記され得る。出力された情報等は削除されてもよい。入力された情報等は他の装置へ送信されてもよい。
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.
本開示における判定は、1ビットで表される値(0か1か)によって行われてもよいし、真偽値(Boolean:true又はfalse)によって行われてもよいし、数値の比較(例えば、所定の値との比較)によって行われてもよい。
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).
ソフトウェアは、ソフトウェア、ファームウェア、ミドルウェア、マイクロコード、ハードウェア記述言語と呼ばれるか、他の名称で呼ばれるかを問わず、命令、命令セット、コード、コードセグメント、プログラムコード、プログラム、サブプログラム、ソフトウェアモジュール、アプリケーション、ソフトウェアアプリケーション、ソフトウェアパッケージ、ルーチン、サブルーチン、オブジェクト、実行可能ファイル、実行スレッド、手順、機能などを意味するよう広く解釈されるべきである。
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.
また、ソフトウェア、命令、情報などは、伝送媒体を介して送受信されてもよい。例えば、ソフトウェアが、有線技術(同軸ケーブル、光ファイバケーブル、ツイストペア、デジタル加入者回線(DSL:Digital Subscriber Line)など)及び無線技術(赤外線、マイクロ波など)の少なくとも一方を使用してウェブサイト、サーバ、又は他のリモートソースから送信される場合、これらの有線技術及び無線技術の少なくとも一方は、伝送媒体の定義内に含まれる。
In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, 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.
本開示において説明した情報、信号などは、様々な異なる技術のいずれかを使用して表されてもよい。例えば、上記の説明全体に渡って言及され得るデータ、命令、コマンド、情報、信号、ビット、シンボル、チップなどは、電圧、電流、電磁波、磁界若しくは磁性粒子、光場若しくは光子、又はこれらの任意の組み合わせによって表されてもよい。
The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description 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
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル及びシンボルの少なくとも一方は信号(シグナリング)であってもよい。また、信号はメッセージであってもよい。また、コンポーネントキャリア(CC:Component Carrier)は、キャリア周波数、セル、周波数キャリアなどと呼ばれてもよい。
The terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, the channel and/or symbols may be signaling. A signal may also be a message. A component carrier (CC) may also be called a carrier frequency, a cell, a frequency carrier, or the like.
本開示において使用する「システム」及び「ネットワーク」という用語は、互換的に使用される。
The terms "system" and "network" used in this disclosure are used interchangeably.
また、本開示において説明した情報、パラメータなどは、絶対値を用いて表されてもよいし、所定の値からの相対値を用いて表されてもよいし、対応する別の情報を用いて表されてもよい。例えば、無線リソースはインデックスによって指示されるものであってもよい。
In addition, the 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. may be represented. For example, radio resources may be indexed.
上述したパラメータに使用する名称はいかなる点においても限定的な名称ではない。さらに、これらのパラメータを使用する数式等は、本開示で明示的に開示したものと異なる場合もある。様々なチャネル(例えば、PUCCH、PDCCHなど)及び情報要素は、あらゆる好適な名称によって識別できるので、これらの様々なチャネル及び情報要素に割り当てている様々な名称は、いかなる点においても限定的な名称ではない。
The names used for the parameters described above are not restrictive names in any respect. Further, the formulas, etc., using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in no way restrictive names. isn't it.
本開示においては、「基地局(BS:Base Station)」、「無線基地局」、「基地局」、「固定局(fixed station)」、「NodeB」、「eNodeB(eNB)」、「gNodeB(gNB)」、「アクセスポイント(access point)」、「送信ポイント(transmission point)」、「受信ポイント(reception point)、「送受信ポイント(transmission/reception point)」、「セル」、「セクタ」、「セルグループ」、「キャリア」、「コンポーネントキャリア」などの用語は、互換的に使用され得る。基地局は、マクロセル、スモールセル、フェムトセル、ピコセルなどの用語で呼ばれる場合もある。
In the present disclosure, "base station (BS)", "radio base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB ( gNB)", "access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", " Terms such as "cell group", "carrier", "component carrier" may be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
基地局は、1つ又は複数(例えば、3つ)のセルを収容することができる。基地局が複数のセルを収容する場合、基地局のカバレッジエリア全体は複数のより小さいエリアに区分でき、各々のより小さいエリアは、基地局サブシステム(例えば、屋内用の小型基地局(RRH:Remote Radio Head)によって通信サービスを提供することもできる。「セル」又は「セクタ」という用語は、このカバレッジにおいて通信サービスを行う基地局及び基地局サブシステムの少なくとも一方のカバレッジエリアの一部又は全体を指す。
A base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple 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: 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. point to
本開示においては、「移動局(MS:Mobile Station)」、「ユーザ端末(user terminal)」、「ユーザ装置(UE:User Equipment)」、「端末」などの用語は、互換的に使用され得る。
In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably. .
移動局は、当業者によって、加入者局、モバイルユニット、加入者ユニット、ワイヤレスユニット、リモートユニット、モバイルデバイス、ワイヤレスデバイス、ワイヤレス通信デバイス、リモートデバイス、モバイル加入者局、アクセス端末、モバイル端末、ワイヤレス端末、リモート端末、ハンドセット、ユーザエージェント、モバイルクライアント、クライアント、又はいくつかの他の適切な用語で呼ばれる場合もある。
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.
基地局及び移動局の少なくとも一方は、送信装置、受信装置、通信装置などと呼ばれてもよい。なお、基地局及び移動局の少なくとも一方は、移動体に搭載されたデバイス、移動体自体などであってもよい。当該移動体は、乗り物(例えば、車、飛行機など)であってもよいし、無人で動く移動体(例えば、ドローン、自動運転車など)であってもよいし、ロボット(有人型又は無人型)であってもよい。なお、基地局及び移動局の少なくとも一方は、必ずしも通信動作時に移動しない装置も含む。例えば、基地局及び移動局の少なくとも一方は、センサなどのIoT(Internet of Things)機器であってもよい。
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 ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and mobile station may be an IoT (Internet of Things) device such as a sensor.
また、本開示における基地局は、ユーザ端末で読み替えてもよい。例えば、基地局及びユーザ端末間の通信を、複数の端末20間の通信(例えば、D2D(Device-to-Device)、V2X(Vehicle-to-Everything)などと呼ばれてもよい)に置き換えた構成について、本開示の各態様/実施形態を適用してもよい。この場合、上述の基地局10が有する機能を端末20が有する構成としてもよい。また、「上り」及び「下り」などの文言は、端末間通信に対応する文言(例えば、「サイド(side)」)で読み替えられてもよい。例えば、上りチャネル、下りチャネルなどは、サイドチャネルで読み替えられてもよい。
Also, the base station in the present disclosure may be read as a user terminal. For example, 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.) Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the terminal 20 may have the functions of the base station 10 described above. Also, words such as "up" and "down" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be read as side channels.
同様に、本開示におけるユーザ端末は、基地局で読み替えてもよい。この場合、上述のユーザ端末が有する機能を基地局が有する構成としてもよい。
Similarly, user terminals in the present disclosure may be read as base stations. In this case, the base station may have the functions that the above-described user terminal has.
本開示で使用する「判断(determining)」、「決定(determining)」という用語は、多種多様な動作を包含する場合がある。「判断」、「決定」は、例えば、判定(judging)、計算(calculating)、算出(computing)、処理(processing)、導出(deriving)、調査(investigating)、探索(looking up、search、inquiry)(例えば、テーブル、データベース又は別のデータ構造での探索)、確認(ascertaining)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、受信(receiving)(例えば、情報を受信すること)、送信(transmitting)(例えば、情報を送信すること)、入力(input)、出力(output)、アクセス(accessing)(例えば、メモリ中のデータにアクセスすること)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、解決(resolving)、選択(selecting)、選定(choosing)、確立(establishing)、比較(comparing)などした事を「判断」「決定」したとみなす事を含み得る。つまり、「判断」「決定」は、何らかの動作を「判断」「決定」したとみなす事を含み得る。また、「判断(決定)」は、「想定する(assuming)」、「期待する(expecting)」、「みなす(considering)」などで読み替えられてもよい。
The terms "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. Also, "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. In addition, "judgment" and "decision" are considered to be "judgment" and "decision" by resolving, selecting, choosing, establishing, comparing, etc. can contain. In other words, "judgment" and "decision" may include considering that some action is "judgment" and "decision". Also, "judgment (decision)" may be read as "assuming", "expecting", "considering", or the like.
「接続された(connected)」、「結合された(coupled)」という用語、又はこれらのあらゆる変形は、2又はそれ以上の要素間の直接的又は間接的なあらゆる接続又は結合を意味し、互いに「接続」又は「結合」された2つの要素間に1又はそれ以上の中間要素が存在することを含むことができる。要素間の結合又は接続は、物理的なものであっても、論理的なものであっても、或いはこれらの組み合わせであってもよい。例えば、「接続」は「アクセス」で読み替えられてもよい。本開示で使用する場合、2つの要素は、1又はそれ以上の電線、ケーブル及びプリント電気接続の少なくとも一つを用いて、並びにいくつかの非限定的かつ非包括的な例として、無線周波数領域、マイクロ波領域及び光(可視及び不可視の両方)領域の波長を有する電磁エネルギーなどを用いて、互いに「接続」又は「結合」されると考えることができる。
The terms "connected", "coupled", or any variation thereof, mean 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". As used in this disclosure, 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.
参照信号は、RS(Reference Signal)と略称することもでき、適用される標準によってパイロット(Pilot)と呼ばれてもよい。
The reference signal can also be abbreviated as RS (Reference Signal), and may also be called Pilot depending on the applicable standard.
本開示において使用する「に基づいて」という記載は、別段に明記されていない限り、「のみに基づいて」を意味しない。言い換えれば、「に基づいて」という記載は、「のみに基づいて」と「に少なくとも基づいて」の両方を意味する。
The term "based on" as used in this disclosure does not mean "based only on" unless otherwise specified. In other words, the phrase "based on" means both "based only on" and "based at least on."
本開示において使用する「第1の」、「第2の」などの呼称を使用した要素へのいかなる参照も、それらの要素の量又は順序を全般的に限定しない。これらの呼称は、2つ以上の要素間を区別する便利な方法として本開示において使用され得る。したがって、第1及び第2の要素への参照は、2つの要素のみが採用され得ること、又は何らかの形で第1の要素が第2の要素に先行しなければならないことを意味しない。
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.
上記の各装置の構成における「手段」を、「部」、「回路」、「デバイス」等に置き換えてもよい。
"Means" in the configuration of each device described above may be replaced with "unit", "circuit", "device", or the like.
本開示において、「含む(include)」、「含んでいる(including)」及びそれらの変形が使用されている場合、これらの用語は、用語「備える(comprising)」と同様に、包括的であることが意図される。さらに、本開示において使用されている用語「又は(or)」は、排他的論理和ではないことが意図される。
Where "include," "including," and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising." is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive OR.
無線フレームは時間領域において1つ又は複数のフレームによって構成されてもよい。時間領域において1つ又は複数の各フレームはサブフレームと呼ばれてもよい。サブフレームは更に時間領域において1つ又は複数のスロットによって構成されてもよい。サブフレームは、ニューメロロジ(numerology)に依存しない固定の時間長(例えば、1ms)であってもよい。
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.
ニューメロロジは、ある信号又はチャネルの送信及び受信の少なくとも一方に適用される通信パラメータであってもよい。ニューメロロジは、例えば、サブキャリア間隔(SCS:SubCarrier Spacing)、帯域幅、シンボル長、サイクリックプレフィックス長、送信時間間隔(TTI:Transmission Time Interval)、TTIあたりのシンボル数、無線フレーム構成、送受信機が周波数領域において行う特定のフィルタリング処理、送受信機が時間領域において行う特定のウィンドウイング処理などの少なくとも1つを示してもよい。
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 structure, 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.
スロットは、時間領域において1つ又は複数のシンボル(OFDM(Orthogonal Frequency Division Multiplexing)シンボル、SC-FDMA(Single Carrier Frequency Division Multiple Access)シンボル等)で構成されてもよい。スロットは、ニューメロロジに基づく時間単位であってもよい。
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.
スロットは、複数のミニスロットを含んでもよい。各ミニスロットは、時間領域において1つ又は複数のシンボルによって構成されてもよい。また、ミニスロットは、サブスロットと呼ばれてもよい。ミニスロットは、スロットよりも少ない数のシンボルによって構成されてもよい。ミニスロットより大きい時間単位で送信されるPDSCH(又はPUSCH)は、PDSCH(又はPUSCH)マッピングタイプAと呼ばれてもよい。ミニスロットを用いて送信されるPDSCH(又はPUSCH)は、PDSCH(又はPUSCH)マッピングタイプBと呼ばれてもよい。
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. PDSCH (or PUSCH) transmitted in time units larger than minislots 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.
無線フレーム、サブフレーム、スロット、ミニスロット及びシンボルは、いずれも信号を伝送する際の時間単位を表す。無線フレーム、サブフレーム、スロット、ミニスロット及びシンボルは、それぞれに対応する別の呼称が用いられてもよい。
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.
例えば、1サブフレームは送信時間間隔(TTI:Transmission Time Interval)と呼ばれてもよいし、複数の連続したサブフレームがTTIと呼ばれてよいし、1スロット又は1ミニスロットがTTIと呼ばれてもよい。つまり、サブフレーム及びTTIの少なくとも一方は、既存のLTEにおけるサブフレーム(1ms)であってもよいし、1msより短い期間(例えば、1-13シンボル)であってもよいし、1msより長い期間であってもよい。なお、TTIを表す単位は、サブフレームではなくスロット、ミニスロットなどと呼ばれてもよい。
For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, and one slot or minislot may be called a TTI. may That is, 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.
ここで、TTIは、例えば、無線通信におけるスケジューリングの最小時間単位のことをいう。例えば、LTEシステムでは、基地局が各端末20に対して、無線リソース(各端末20において使用することが可能な周波数帯域幅、送信電力など)を、TTI単位で割り当てるスケジューリングを行う。なお、TTIの定義はこれに限られない。
Here, TTI refers to, for example, the minimum scheduling time unit in wireless communication. For example, in the LTE system, 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. Note that the definition of TTI is not limited to this.
TTIは、チャネル符号化されたデータパケット(トランスポートブロック)、コードブロック、コードワードなどの送信時間単位であってもよいし、スケジューリング、リンクアダプテーションなどの処理単位となってもよい。なお、TTIが与えられたとき、実際にトランスポートブロック、コードブロック、コードワードなどがマッピングされる時間区間(例えば、シンボル数)は、当該TTIよりも短くてもよい。
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.
なお、1スロット又は1ミニスロットがTTIと呼ばれる場合、1以上のTTI(すなわち、1以上のスロット又は1以上のミニスロット)が、スケジューリングの最小時間単位となってもよい。また、当該スケジューリングの最小時間単位を構成するスロット数(ミニスロット数)は制御されてもよい。
When one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) 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.
1msの時間長を有するTTIは、通常TTI(LTE Rel.8-12におけるTTI)、ノーマルTTI、ロングTTI、通常サブフレーム、ノーマルサブフレーム、ロングサブフレーム、スロットなどと呼ばれてもよい。通常TTIより短いTTIは、短縮TTI、ショートTTI、部分TTI(partial又はfractional TTI)、短縮サブフレーム、ショートサブフレーム、ミニスロット、サブスロット、スロットなどと呼ばれてもよい。
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.
なお、ロングTTI(例えば、通常TTI、サブフレームなど)は、1msを超える時間長を有するTTIで読み替えてもよいし、ショートTTI(例えば、短縮TTIなど)は、ロングTTIのTTI長未満かつ1ms以上のTTI長を有するTTIで読み替えてもよい。
Note that the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms, and the short TTI (e.g., shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms A TTI having the above TTI length may be read instead.
リソースブロック(RB)は、時間領域及び周波数領域のリソース割当単位であり、周波数領域において、1つ又は複数個の連続した副搬送波(subcarrier)を含んでもよい。RBに含まれるサブキャリアの数は、ニューメロロジに関わらず同じであってもよく、例えば12であってもよい。RBに含まれるサブキャリアの数は、ニューメロロジに基づいて決定されてもよい。
A resource block (RB) 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.
また、RBの時間領域は、1つ又は複数個のシンボルを含んでもよく、1スロット、1ミニスロット、1サブフレーム、又は1TTIの長さであってもよい。1TTI、1サブフレームなどは、それぞれ1つ又は複数のリソースブロックで構成されてもよい。
Also, 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.
なお、1つ又は複数のRBは、物理リソースブロック(PRB:Physical RB)、サブキャリアグループ(SCG:Sub-Carrier Group)、リソースエレメントグループ(REG:Resource Element Group)、PRBペア、RBペアなどと呼ばれてもよい。
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.
また、リソースブロックは、1つ又は複数のリソースエレメント(RE:Resource Element)によって構成されてもよい。例えば、1REは、1サブキャリア及び1シンボルの無線リソース領域であってもよい。
Also, a resource block may be composed of one or more resource elements (RE: Resource Element). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
帯域幅部分(BWP:Bandwidth Part)(部分帯域幅などと呼ばれてもよい)は、あるキャリアにおいて、あるニューメロロジ用の連続する共通RB(common resource blocks)のサブセットのことを表してもよい。ここで、共通RBは、当該キャリアの共通参照ポイントを基準としたRBのインデックスによって特定されてもよい。PRBは、あるBWPで定義され、当該BWP内で番号付けされてもよい。
A bandwidth part (BWP) (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. Here, 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.
BWPには、UL用のBWP(UL BWP)と、DL用のBWP(DL BWP)とが含まれてもよい。端末20に対して、1キャリア内に1つ又は複数のBWPが設定されてもよい。
The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be configured for terminal 20 within one carrier.
設定されたBWPの少なくとも1つがアクティブであってもよく、端末20は、アクティブなBWPの外で所定の信号/チャネルを送受信することを想定しなくてもよい。なお、本開示における「セル」、「キャリア」などは、「BWP」で読み替えられてもよい。
At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a given signal/channel outside the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be read as "BWP".
上述した無線フレーム、サブフレーム、スロット、ミニスロット及びシンボルなどの構造は例示に過ぎない。例えば、無線フレームに含まれるサブフレームの数、サブフレーム又は無線フレームあたりのスロットの数、スロット内に含まれるミニスロットの数、スロット又はミニスロットに含まれるシンボル及びRBの数、RBに含まれるサブキャリアの数、並びにTTI内のシンボル数、シンボル長、サイクリックプレフィックス(CP:Cyclic Prefix)長などの構成は、様々に変更することができる。
The structures such as radio frames, subframes, slots, minislots and symbols described above are only examples. For example, 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. can be varied.
本開示において、例えば、英語でのa, an及びtheのように、翻訳により冠詞が追加された場合、本開示は、これらの冠詞の後に続く名詞が複数形であることを含んでもよい。
In this disclosure, if articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are plural.
本開示において、「AとBが異なる」という用語は、「AとBが互いに異なる」ことを意味してもよい。なお、当該用語は、「AとBがそれぞれCと異なる」ことを意味してもよい。「離れる」、「結合される」などの用語も、「異なる」と同様に解釈されてもよい。
In the present disclosure, the term "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."
本開示において説明した各態様/実施形態は単独で用いられてもよいし、組み合わせて用いられてもよいし、実行に伴って切り替えて用いられてもよい。また、所定の情報の通知(例えば、「Xであること」の通知)は、明示的に行うものに限られず、暗黙的(例えば、当該所定の情報の通知を行わない)ことによって行われてもよい。
Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. In addition, the notification of predetermined information (for example, notification of “being X”) is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.
以上、本開示について詳細に説明したが、当業者にとっては、本開示が本開示中に説明した実施形態に限定されるものではないということは明らかである。本開示は、請求の範囲の記載により定まる本開示の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。したがって、本開示の記載は、例示説明を目的とするものであり、本開示に対して何ら制限的な意味を有するものではない。
Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be practiced with modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not meant to be limiting in any way.
10 基地局
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 無線中継装置
310 送信部
320 受信部
330 制御部
340 可変部
350 アンテナ部
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) 10base station 110 transmitting unit 120 receiving unit 130 setting unit 140 control unit 20 terminal 210 transmitting unit 220 receiving unit 230 setting unit 240 control unit 30 radio relay device 310 transmitting unit 320 receiving unit 330 control unit 340 variable unit 350 antenna unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Driving unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication Module 2021 Current sensor 2022 Revolution sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving support system unit 2031 Microprocessor 2032 Memory (ROM, RAM)
2033 communication port (IO port)
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 無線中継装置
310 送信部
320 受信部
330 制御部
340 可変部
350 アンテナ部
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) 10
2033 communication port (IO port)
Claims (6)
- 同期信号及び報知情報を含みインデックスに関連付けられる信号を、複数送信する送信部と、
前記信号の送信に係る動作を制御する制御部とを有し、
前記制御部は、無線中継装置が存在する場合、前記インデックスに関連付けられる前記信号を追加する基地局。 a transmitter that transmits a plurality of signals associated with the index, including synchronization signals and broadcast information;
a control unit that controls operations related to transmission of the signal;
The base station, wherein the control unit adds the signal associated with the index when a radio relay device exists. - 無線中継装置から報告を受信する受信部をさらに有し、
前記受信部が前記報告を受信した数だけ、前記制御部は、前記インデックスに関連付けられる前記信号を追加する請求項1記載の基地局。 further comprising a receiving unit for receiving reports from the radio relay device;
The base station according to claim 1, wherein the control unit adds the signal associated with the index as many times as the reception unit receives the reports. - 前記制御部は、無線中継装置が存在する場合、前記インデックスに関連付けられる前記信号を一つ追加し、前記追加された前記信号に第1のビームを適用し、さらに、無線中継装置に複数の第2のビームがそれぞれ適用される複数のCSI-RS(Channel State Information - Reference Signal)を割り当てる請求項1記載の基地局。 The controller adds one of the signals associated with the index, applies a first beam to the added signal, and a plurality of second 2. The base station according to claim 1, which allocates a plurality of CSI-RSs (Channel State Information--Reference Signals) to which two beams are respectively applied.
- 前記制御部は、無線中継装置と、下りリンクに係る時間の同期を行い、前記信号に適用するビームの切り替えタイミングを決定する請求項1記載の基地局。 The base station according to claim 1, wherein the control unit performs downlink time synchronization with the radio relay apparatus, and determines beam switching timing to be applied to the signal.
- 前記制御部は、無線中継装置と、上りリンクに係る時間の同期を行い、下りリンクに対して上りリンクに適用するビームの切り替えタイミングを早くする請求項4記載の基地局。 5. The base station according to claim 4, wherein the control unit synchronizes the time related to the uplink with the radio relay apparatus, and advances the switching timing of the beam applied to the uplink with respect to the downlink.
- 同期信号及び報知情報を含みインデックスに関連付けられる信号を、複数送信する送信手順と、
前記信号の送信に係る動作を制御する制御手順と、
無線中継装置が存在する場合、追加された前記インデックスに関連付けらえる前記信号を送信する手順とを基地局が実行する通信方法。 a transmission procedure for transmitting a plurality of signals associated with the index, including synchronization signals and broadcast information;
a control procedure for controlling operations related to transmission of the signal;
and transmitting the signal associated with the added index if a radio repeater is present.
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Citations (3)
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JP2001103559A (en) * | 1999-09-29 | 2001-04-13 | Hitachi Kokusai Electric Inc | Digital mobile communication system and its wireless relay station device |
WO2020166043A1 (en) * | 2019-02-14 | 2020-08-20 | 株式会社Nttドコモ | User terminal and wireless communication method |
WO2021210182A1 (en) * | 2020-04-17 | 2021-10-21 | 株式会社Nttドコモ | Terminal, wireless communication method, and base station |
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JP2001103559A (en) * | 1999-09-29 | 2001-04-13 | Hitachi Kokusai Electric Inc | Digital mobile communication system and its wireless relay station device |
WO2020166043A1 (en) * | 2019-02-14 | 2020-08-20 | 株式会社Nttドコモ | User terminal and wireless communication method |
WO2021210182A1 (en) * | 2020-04-17 | 2021-10-21 | 株式会社Nttドコモ | Terminal, wireless communication method, and base station |
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HUAWEI, HISILICON: "SSB-based discovery and measurement for IAB", 3GPP DRAFT; R1-1908035, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Prague, Czech Republic; 20190826 - 20190830, 17 August 2019 (2019-08-17), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051764658 * |
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