WO2023067818A1 - 無線中継装置及び通信方法 - Google Patents
無線中継装置及び通信方法 Download PDFInfo
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- WO2023067818A1 WO2023067818A1 PCT/JP2021/039183 JP2021039183W WO2023067818A1 WO 2023067818 A1 WO2023067818 A1 WO 2023067818A1 JP 2021039183 W JP2021039183 W JP 2021039183W WO 2023067818 A1 WO2023067818 A1 WO 2023067818A1
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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
- 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 radio relay device and a communication method in a radio 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).
- 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 It is necessary to perform a signal relay operation according to the method.
- the present invention has been made in view of the above points, and it is an object of the present invention to allow a wireless relay device to control the signal relay operation according to the communication method in a wireless communication system.
- a receiving unit that receives information on a duplexing scheme in a network from a base station, and a downlink radio signal and an uplink radio signal between the base station and the terminal based on the information on the duplexing scheme
- a wireless relay device having a control unit for relaying is provided.
- a wireless relay device in a wireless communication system, can control the signal relay operation according to the communication method.
- 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. 3 is a diagram for explaining an example of an XDD configuration
- FIG. FIG. 4 is a diagram showing an example of a slot format of XDD configuration
- It is a figure which shows the example of communication by XDD in embodiment of this invention.
- 1 is a diagram showing an example (1) of communication by FD according to an embodiment of the present invention
- FIG. 4 is a diagram showing an example (2) of communication by FD in the embodiment of the present invention
- FIG. 10 is a diagram showing an example (3) of communication by FD according to the embodiment of the present invention
- 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 signals 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 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.
- very high frequencies such as terahertz waves
- the benefits are speedup due to the use of ultra-wideband and low delay due to the short symbol length.
- drawbacks such as a decrease in reliability due to the high straightness.
- 6G communication it is required to consider how to ensure redundancy, that is, how to increase the number of communication transmission points.
- 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
- the RIS may relay signals to which FD (Full-duplex) or XDD (Cross division duplex) is applied.
- FD or XDD can be expected to improve resource utilization efficiency.
- XDD is a duplex scheme in which the base station 10 and/or the terminal 20 simultaneously performs transmission and reception using adjacent frequency resources at the same time.
- XDD may also be a split duplex method that combines TDD and FDD for UL and DL.
- XDD may refer to a duplexing method that frequency division multiplexes the DL and UL within one component carrier (CC) of the TDD band or on multiple CCs (DL and UL can be used simultaneously).
- CC component carrier
- DL and UL can be used simultaneously.
- FD is a duplex scheme in which the base station 10 and/or terminal 20 simultaneously performs transmission and reception using the same frequency and the same time resource.
- using XDD or FD can achieve the advantages of both FDD and TDD while mitigating the disadvantages.
- FIG. 9 is a diagram for explaining an example of the XDD configuration.
- UL frequency resources may be arranged such that DL frequency resources are sandwiched between them.
- all frequency resources may be UL.
- the base station 10 may operate in XDD and the terminal 20 may operate in TDD.
- some of the frequency resources may be used as the UL part so as to sandwich the DL part. This makes it possible to reduce inter-terminal interference with other bands.
- both intra-carrier XDD and inter-carrier XDD are conceivable.
- XDD achieves extended coverage, increased UL capacity and reduced latency.
- the XDD configuration may be defined as follows.
- the frequency resources available for UL in time resource 1 are part of the frequency resources available for UL in time resource 2 .
- the frequency resources that cannot be used for UL are the frequency resources above and below the frequency resources that can be used for UL.
- Frequency resources available for UL in time resource 1 may be available for DL.
- multiple TDD settings may be set for a given cell. For example, it may be set as DDDSU and UUUUU.
- FIG. 10 is a diagram showing an example of the slot format of the XDD configuration.
- SFI Slot format indicator
- a new SFI and an indication method in DL reception or UL transmission in XDD operation may be used.
- FIG. 10 it may be indicated using at least one of conventional SFI formats 56-254.
- X indicates the XDD configuration.
- FIG. 11 is a diagram showing an example of XDD communication according to the embodiment of the present invention.
- UL frequency resources may be arranged so as to be sandwiched between DL frequency resources at the same time.
- the RIS that relays signals from the base station 10 and the terminal 20 may receive information related to the XDD configuration of the network from the base station 10.
- the information may be information indicating the DL frequency domain and the UL frequency domain in the XDD configuration.
- the RIS may receive this information either in RRC signaling, MAC-CE, group common DCI, UE or RIS specific DCI.
- the RIS may relay only a predetermined frequency signal when relaying the DL signal received from the base station 10 and/or the UL signal received from the terminal 20. For example, relaying of DL signals and relaying of UL signals may be performed simultaneously on separate frequencies. The same power amplification may be applied in each relay or may be different. The same transmission power value may be applied in each relay, or it may be different. Also, the DL signal relay and the UL signal relay may not be performed at the same time, but may be performed at separate times.
- the RIS may report the capability of the RIS related to the XDD configuration to the base station 10.
- the capability may be, for example, whether or not to support the XDD configuration, or whether or not to support simultaneous relaying of DL and UL signals in the XDD configuration.
- the XDD configuration capability may be reported to the base station 10 .
- FIG. 12 is a diagram showing an example (1) of communication by FD according to the embodiment of the present invention.
- UL and DL may be transmitted on the same time and same frequency resource in FD.
- DL and UL hereinafter may mean a DL signal and a UL signal, respectively.
- the RIS that relays signals from the base station 10 and the terminal 20 may receive information related to the FD configuration of the network from the base station 10.
- the RIS may receive this information either in RRC signaling, MAC-CE, group common DCI, UE or RIS specific DCI.
- the information may be, for example, information indicating whether it is an FD configuration, an HD (Half-duplex) configuration, or an XDD configuration. /UL beamset correspondence), information indicating whether DL and UL can occur at the same time.
- FIG. 13 is a diagram showing an example (2) of communication by FD according to the embodiment of the present invention.
- FIG. 13 shows an example in which DL and UL are performed in different directions for communication between RIS and UE in an FD configuration.
- DL is transmitted from base station 10 and received by terminal 20A via RIS 30
- UL is transmitted from terminal 20B and received by base station 10 via RIS 30.
- FIG. 13 is a diagram showing an example (2) of communication by FD according to the embodiment of the present invention.
- FIG. 13 shows an example in which DL and UL are performed in different directions for communication between RIS and UE in an FD configuration.
- DL is transmitted from base station 10 and received by terminal 20A via RIS 30
- UL is transmitted from terminal 20B and received by base station 10 via RIS 30.
- FIG. 14 is a diagram showing an example (3) of communication by FD according to the embodiment of the present invention.
- FIG. 14 shows an example in which DL and UL are performed in the same direction for communication between RIS and UE in the FD configuration.
- DL is transmitted from base station 10 and received by terminal 20A via RIS 30
- UL is transmitted from terminal 20A and received by base station 10 via RIS 30.
- FIG. 14 is a diagram showing an example (3) of communication by FD according to the embodiment of the present invention.
- FIG. 14 shows an example in which DL and UL are performed in the same direction for communication between RIS and UE in the FD configuration.
- DL is transmitted from base station 10 and received by terminal 20A via RIS 30
- UL is transmitted from terminal 20A and received by base station 10 via RIS 30.
- the RIS may receive from the base station 10 information indicating whether or not to apply the operation related to FD.
- the RIS may receive this information either in RRC signaling, MAC-CE, group common DCI, UE or RIS specific DCI.
- the operation of the RIS differs depending on whether or not FD is applied. For example, the RIS needs to perform loop interference mitigation operations only when relaying DL and UL at the same time.
- the same power amplification may be applied to each of DL and UL, or may be different.
- the same transmit power value may be applied to each of the DL and UL, or they may be different.
- the RIS may report the RIS capability related to the FD configuration to the base station 10 .
- the capability may be, for example, whether to support the FD configuration, may be whether to support the simultaneous relay of the DL signal and the UL signal in the FD configuration, RIS and UE whether to support simultaneous relaying of DL and UL for the same UE or the same direction (a given DL/UL beamset correspondence) for communication between.
- the capability of the FD configuration may be reported to the base station 10 .
- DL for communication between RIS and UE if simultaneous relaying of DL and UL is supported for the same UE or same direction (given DL/UL beamset correspondence) for communication between RIS and UE and UL are done in the same direction
- the example shown in FIG. 14 may be supported.
- DL for communication between RIS and UE if simultaneous relaying of DL and UL is not supported for the same UE or same direction (given DL/UL beamset correspondence) for communication between RIS and UE
- FIG. 13 where the UL and UL are done for different directions may be supported.
- the RIS can preferably relay signals and improve communication quality even when communication is performed in the XDD configuration or FD configuration.
- the wireless relay device can control the signal relay operation according to the communication method.
- 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. 15 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 microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate ), etc., and part or all of each functional block may be realized by the hardware.
- DSPs digital signal processors
- ASICs Application Specific Integrated Circuits
- PLDs Programmable Logic Devices
- FPGAs Field Programmable Gate
- 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, and 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 implements 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 receiving unit that receives information about a duplexing scheme in a network from a base station;
- a radio relay apparatus having a control section for relaying downlink radio signals and uplink radio signals between terminals is provided.
- the RIS can preferably relay signals and improve communication quality even when communication is performed in the XDD configuration or FD configuration. That is, in a wireless communication system, a wireless relay device can control signal relay operation according to a communication method.
- the control unit When the duplex system is XDD (Cross Division Duplex), the control unit relays a radio signal of a first frequency when relaying the downlink radio signal, and relays a second frequency when relaying the uplink radio signal. A radio signal of a frequency may be relayed.
- the RIS can preferably relay signals and improve communication quality even when communication is performed in the XDD configuration or FD configuration.
- the first frequency and the second frequency may be different, and the downlink radio signal and the uplink radio signal may be relayed simultaneously.
- the RIS can preferably relay signals and improve communication quality even when communication is performed in the XDD configuration or FD configuration.
- the control unit may determine whether to apply the operation related to FD.
- the RIS can preferably relay signals and improve communication quality even when communication is performed in the XDD configuration or FD configuration.
- the control unit determines whether the information related to the duplexing scheme is for the same terminal, based on information indicating whether the downlink signal and the uplink signal are generated at the same time.
- Downlink radio signals and uplink radio signals may be relayed.
- the RIS can preferably relay signals and improve communication quality even when communication is performed in the XDD configuration or FD configuration.
- a communication method is provided in which a radio relay device executes a control procedure for relaying a signal and an uplink radio signal.
- the RIS can preferably relay signals and improve communication quality even when communication is performed in the XDD configuration or FD configuration. That is, in a wireless communication system, a wireless relay device can control signal relay operation according to a communication method.
- 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
Description
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。
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。
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。
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。
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。
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。
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。
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)
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。
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。
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
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。
以上、説明したように、本発明の実施の形態によれば、ネットワークにおける複信方式に係る情報を基地局から受信する受信部と、前記複信方式に係る情報に基づいて、前記基地局と端末間の下り無線信号及び上り無線信号を中継する制御部とを有する無線中継装置が提供される。
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。
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)
Claims (6)
- ネットワークにおける複信方式に係る情報を基地局から受信する受信部と、
前記複信方式に係る情報に基づいて、前記基地局と端末間の下り無線信号及び上り無線信号を中継する制御部とを有する無線中継装置。 - 前記制御部は、前記複信方式がXDD(Cross division duplex)である場合、前記下り無線信号を中継するとき第1の周波数の無線信号を中継し、前記上り無線信号を中継するとき第2の周波数の無線信号を中継する請求項1記載の無線中継装置。
- 前記第1の周波数と前記第2の周波数とが異なり、かつ前記下り無線信号と前記上り無線信号が同時に中継される請求項2記載の無線中継装置。
- 前記制御部は、前記複信方式がFD(Full-duplex)である場合、FDに係る動作を適用するか否かを決定する請求項1記載の無線中継装置。
- 前記制御部は、前記複信方式に係る情報が、同一の端末に対して、前記下り信号と前記上り信号が同時に発生するか否かを示す情報に基づいて、前記基地局と前記端末間の下り無線信号及び上り無線信号を中継する請求項4記載の無線中継装置。
- ネットワークにおける複信方式に係る情報を基地局から受信する受信手順と、
前記複信方式に係る情報に基づいて、前記基地局と端末間の下り無線信号及び上り無線信号を中継する制御手順とを無線中継装置が実行する通信方法。
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