WO2023152988A1 - Station de base et procédé de communication - Google Patents

Station de base et procédé de communication Download PDF

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Publication number
WO2023152988A1
WO2023152988A1 PCT/JP2022/005760 JP2022005760W WO2023152988A1 WO 2023152988 A1 WO2023152988 A1 WO 2023152988A1 JP 2022005760 W JP2022005760 W JP 2022005760W WO 2023152988 A1 WO2023152988 A1 WO 2023152988A1
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WO
WIPO (PCT)
Prior art keywords
channel access
base station
channels
lbt
channel
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PCT/JP2022/005760
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English (en)
Japanese (ja)
Inventor
尚哉 芝池
浩樹 原田
聡 永田
Original Assignee
株式会社Ｎｔｔドコモ
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2022/005760 priority Critical patent/WO2023152988A1/fr
Publication of WO2023152988A1 publication Critical patent/WO2023152988A1/fr

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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
    • H04W16/14—Spectrum sharing arrangements between different networks

Definitions

  • the present invention relates to a base station and communication method in a wireless communication system.
  • NR New Radio
  • LTE Long Term Evolution
  • Non-Patent Document 2 is considering using a higher frequency band than previous releases (eg, Non-Patent Document 2).
  • a higher frequency band eg., Non-Patent Document 2.
  • applicable numerology including subcarrier spacing, channel bandwidth, etc., physical layer design, possible obstacles in actual wireless communication, etc. are being studied.
  • the present invention has been made in view of the above points, and can execute a multi-channel access procedure in a wireless communication system.
  • a control unit that determines a multi-channel access procedure with LBT (Listen before talk), and a communication unit that performs LBT in a plurality of channels based on the determined multi-channel access procedure and the control unit determines a maximum value of a range of counter values for determining a length of a period constituting a contention window applied to the determined multi-channel access procedure, and based on the maximum value, the A base station is provided that determines a contention window.
  • LBT Listen before talk
  • a multi-channel access procedure can be executed in a wireless communication system.
  • FIG. 1 is a diagram showing a configuration example of a radio communication system according to an embodiment of the present invention
  • FIG. It is a figure which shows the example of the frequency range in embodiment of this invention. It is a figure for demonstrating the example of LBT(Listen before talk). It is a flow chart for explaining an example (1) of operation concerning LBT in an embodiment of the invention. It is a flow chart for explaining an example (2) of operation concerning LBT 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. 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 showing a configuration example of 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. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example, and there may be a plurality of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • a physical resource of a radio signal is defined in the time domain and the frequency domain.
  • the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain is defined by the number of subcarriers or the number of resource blocks. good too.
  • the base station 10 transmits synchronization signals and system information to the terminal 20 .
  • Synchronization signals are, for example, NR-PSS and NR-SSS.
  • the system information is transmitted by, for example, NR-PBCH, and is also called broadcast information.
  • the synchronization signal and system information may be called SSB (SS/PBCH block). As shown in FIG.
  • the base station 10 transmits control signals or data to the terminal 20 on DL (Downlink) and receives control signals or data from the terminal 20 on UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Also, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Also, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) by CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 by DC (Dual Connectivity).
  • SCell Secondary Cell
  • PCell Primary Cell
  • DC Direct Connectivity
  • 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. Also, the terminal 20 receives various reference signals transmitted from the base station 10, and measures channel quality based on the reception result of the reference signals.
  • M2M Machine-to-Machine
  • FIG. 2 is a diagram showing an example of frequency ranges according to the embodiment of the present invention.
  • FR Frequency range 1 1
  • SCS Sub carrier spacing
  • the bandwidth is from 5 MHz to 100 MHz.
  • FR2-1 is a frequency band from 24.25 GHz to 52.6 GHz
  • SCS uses 60, 120 or 240 kHz with a bandwidth of 50 MHz to 400 MHz.
  • FR2-2 is a frequency band from 52.6 GHz to 71 GHz. Note that the frequency band to be newly operated may include an unlicensed band, that is, an unlicensed band.
  • the FCC Federal Communications Commission
  • the FCC Federal Communications Commission
  • Japanese regulations require carrier sense before starting transmission with a transmission power exceeding 10 mW.
  • carrier sense has a mechanism similar to LBT, the details have not been determined.
  • the base station 10 or terminal 20 when the base station 10 or terminal 20 starts channel occupation, it is being considered to support both channel access with LBT and channel access without LBT. Also, regarding the LBT mechanism, omni-directional LBT, directional LBT, and LBT type mechanisms executed by the receiver are being studied.
  • FR2-2 it is being considered to support two media access mechanisms: channel access that performs LBT and channel access that does not perform LBT.
  • no LBT may be applied when Equivalent Isotopically Radiated Power (EIRP), transmission power, duty cycle of channel occupancy, characteristics related to spatial multiplexing, etc. are met.
  • EIRP Equivalent Isotopically Radiated Power
  • Long-term sensing is also an approach that allows beam reuse if many beam collisions occur.
  • Short-term sensing is a type of LBT.
  • LBT in which the sensing period is randomly determined.
  • Type 1 LBT in Release 16NR-U NR system using unlicensed bands.
  • LBT with fixed sensing period.
  • Type 2a/2b LBT in Release 16NR-U There is a high possibility that transmissions will collide between multiple devices, but since there is no backoff, there is little delay in transmission timing.
  • FIG. 3 is a diagram for explaining an example of LBT (Listen Before Talk).
  • LBT Listen Before Talk
  • the Clear Channel Assessment (CCA) procedure has a period of 8 microseconds + 5 microseconds times a random counter, as shown in FIG. is defined as the detection period of the channel.
  • the random counter is an example of 3 in the first LBT
  • the channel busy is detected in the detection period from 14 microseconds to 18 microseconds. example.
  • the second LBT the random counter channel busy is detected in the first LBT is started from the state of 2
  • the detection period shows an example where transmission is started because channel busy was not detected in .
  • FR2-2 the channel access procedure shown in 1)-3) below may be executed.
  • the following measurement period may be called CW (Contention window).
  • Type 1 channel access procedures (which may be referred to as Category 3 LBT). Two types of observation slots are defined, one is 8 microseconds and the other is 5 microseconds. In total, a measurement period of (8+5*N) microseconds is required before transmission.
  • the counter value N may be randomly selected from integers from 0 to 3.
  • the channel access procedure shown in FIG. 3 corresponds to a Type 1 channel access procedure.
  • Type 2 channel access procedures (which may be referred to as Category 2 LBT).
  • One type of 8 microsecond measurement period is defined. A total measurement period of 8 microseconds is required before transmission.
  • Type 3 channel access procedures No sensing or LBT is performed.
  • the type 1 channel access procedure may be called type 1 LBT
  • the type 2 channel access procedure may be called type 2 LBT
  • the type 3 channel access procedure may be called type 3 LBT.
  • the terminal 20 may independently report to the base station 10 the capability indicating whether to support type 1 channel access and the capability indicating whether to support type 2 channel access. good.
  • 3GPP Release 16NR-U supports the channel access procedures 1) and 2) shown below.
  • Type A multi-channel access performs a channel access for each channel the device intends to use. Furthermore, type A1 and type A2 are defined. In type A1, CW is determined independently for each channel. In type A2, the maximum CW is determined over multiple channels intended for use.
  • type B multi-channel access channel access is performed on the primary channel first, then type 2A channel access procedure (see Non-Patent Document 3) is performed for each channel. Furthermore, type B1 and type B2 are defined. Type B1 maintains a single CW for the intended channel set. In type B2, the CW value is maintained independently for each channel.
  • type A may be supported.
  • type A1 multi-channel access and type A2 multi-channel access the parameter CW p used to determine the initial value of the counter value N in the type 1 channel access procedure described above is good.
  • CW p per channel may be configured.
  • the maximum CW p among channels may be set in common for each channel.
  • one of the values from 0 to CW p is selected with equal probability.
  • the parameter CW p may be replaced with a parameter CW that does not specify the priority class.
  • a minimum value and a maximum value may be set for the parameter CW p .
  • a fixed value eg, 3
  • the new frequency band may be 52.6 GHz-71 GHz, or may be another frequency band.
  • Multi-channel access types A1 and A2 1) Multi-channel access types A1 and A2 2) Multi-channel access type A1 3) Multi-channel access type A2 4) Multi-channel access types A1, A2, B1 and B2 5) Multi-channel access type B1 6) Multi-channel access type B2 7) Multi-channel access types B1 and B2 8) Multi-channel access types A1 and B1
  • FIG. 4 is a flowchart for explaining an example (1) of the operation related to LBT in the embodiment of the present invention.
  • the base station 10 determines CW p to apply to a given channel in the multi-channel access procedure.
  • the base station 10 determines the counter value N based on CW p .
  • the base station 10 determines a contention window based on the counter value N.
  • the base station 10 performs LBT in the contention window. The base station 10 may perform transmission if no channel busy is detected by the LBT.
  • the multi-channel access procedure shown in FIG. 4 may be executed by the terminal 20 or by the base station 10.
  • CW p may be determined by the methods shown in 1)-4) below.
  • the multi-channel access procedure applying CW p determined by the above method may be the procedure shown in 1)-8) below.
  • Multi-channel access types A1 and A2 1) Multi-channel access types A1 and A2 2) Multi-channel access type A1 3) Multi-channel access type A2 4) Multi-channel access types A1, A2, B1 and B2 5) Multi-channel access type B1 6) Multi-channel access type B2 7) Multi-channel access types B1 and B2 8) Multi-channel access types A1 and B1
  • CW p determined by the above method may be replaced with "the maximum value of the range of values of the counter N".
  • FIG. 5 is a flowchart for explaining an example (2) of the operation related to LBT in the embodiment of the present invention.
  • the base station 10 performs a multi-channel access procedure and transmits on multiple channels.
  • the base station 10 stops transmission on any one of the multi-channels.
  • the base station 10 reinitializes the counter value N applied to the predetermined channel.
  • the base station 10 determines a contention window based on the counter value N.
  • the base station 10 performs LBT in the contention window. The base station 10 may perform transmission if no channel busy is detected by the LBT.
  • the multi-channel access procedure shown in FIG. 5 may be executed by the terminal 20 or by the base station 10.
  • the counter value N of the channel is determined by the method shown in 1)-3) below. good too.
  • the counter values N of all channels are reinitialized. 2) The counter value N for all or some channels is determined based on the implementation. 3) The counter value N is reinitialized only for the channel that has stopped transmission.
  • the multi-channel access procedure that applies the counter value N determined by the above method may be the procedure shown in 1)-5) below.
  • Multi-channel access type A1 2) Multi-channel access type A2 3) Multi-channel access type B1 4) Multi-channel access type B2 5) Other multi-channel access type combinations
  • the multi-channel access procedure to be applied may be different for each method of determining the counter value N, or the multi-channel access procedure to be applied to the method of determining the counter value N may be the same.
  • the frequency band of 52.6 GHz-71 GHz may be interpreted as FR2-2 or FR2. It should be noted that the above-described multi-channel access embodiments may be limited to application to unlicensed bands or to channel access in a shared spectrum. It should be noted that the above-described embodiments related to multi-channel access may be applied when the base station 10 transmits, and may be applied when the terminal 20 transmits.
  • the base station 10 or the terminal 20 can determine necessary parameters in the new frequency band, perform LBT, and perform multi-channel access procedures.
  • a multi-channel access procedure can be performed in a wireless communication system.
  • the base stations 10 and terminals 20 contain the functionality to implement the embodiments described above. However, each of the base station 10 and terminal 20 may have only part of the functions in the embodiment.
  • FIG. 6 is a diagram showing an example of the functional configuration of base station 10 according to the embodiment of the present invention.
  • the base station 10 has a transmitting section 110, a receiving section 120, a setting section 130, and a control section 140.
  • the functional configuration shown in FIG. 6 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 transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal.
  • the transmitter 110 also transmits inter-network-node messages to other network nodes.
  • 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, etc. to the terminal 20 .
  • the receiver 120 also receives inter-network-node messages from other network nodes. Note that the transmitting unit 110 and the receiving unit 120 may also be referred to as a communication unit.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 .
  • the content of the configuration information is, for example, information related to channel access configuration.
  • the control unit 140 performs control related to channel access settings, as described in the embodiment. Also, the control unit 240 controls the LBT. Also, the control unit 140 executes scheduling. A functional unit related to signal transmission in control unit 140 may be included in transmitting unit 110 , and a functional unit related to signal reception in control unit 140 may be included in receiving unit 120 .
  • FIG. 7 is a diagram showing an example of the functional configuration of terminal 20 according to the embodiment of the present invention.
  • the terminal 20 has a transmitting section 210, a receiving section 220, a setting section 230, and a control section 240.
  • the functional configuration shown in FIG. 7 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 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 receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals and the like transmitted from the base station 10 .
  • the transmission unit 210 as D2D communication, to the other terminal 20, PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) etc.
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the receiving unit 220 receives PSCCH, PSSCH, PSDCH, PSBCH, or the like from other terminals 20 .
  • the transmitting unit 210 and the receiving unit 220 may also be referred to as a communication unit.
  • the setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 .
  • the setting unit 230 also stores preset setting information.
  • the content of the configuration information is, for example, information related to channel access configuration.
  • the control unit 240 controls channel access settings as described in the embodiment. Also, the control unit 240 controls the LBT. A functional unit related to signal transmission in control unit 240 may be included in transmitting unit 210 , and a functional unit related to signal reception in control unit 240 may be included in receiving unit 220 .
  • each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separated devices (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, examining, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (component) that performs transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.
  • the base station 10, the terminal 20, etc. may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 8 is a diagram illustrating an example of hardware configurations of the base station 10 and the terminal 20 according to an embodiment of the present disclosure.
  • the base station 10 and terminal 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. good too.
  • the term "apparatus” can be read as a circuit, device, unit, or the like.
  • the hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
  • Each function of the base station 10 and the terminal 20 is performed by the processor 1001 performing calculations and controlling communication by the communication device 1004 by loading predetermined software (programs) onto hardware such as the processor 1001 and the storage device 1002. or by controlling at least one of data reading and writing in the storage device 1002 and the auxiliary storage device 1003 .
  • the processor 1001 for example, operates an operating system and controls the entire computer.
  • the processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
  • CPU central processing unit
  • the control unit 140 , the control unit 240 and the like described above may be implemented by the processor 1001 .
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to them.
  • programs program codes
  • software modules software modules
  • data etc.
  • the program a program that causes a computer to execute at least part of the operations described in the above embodiments is used.
  • control unit 140 of base station 10 shown in FIG. 6 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 .
  • the control unit 240 of the terminal 20 shown in FIG. 7 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001.
  • FIG. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.
  • the storage device 1002 is a computer-readable recording medium, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be configured.
  • the storage device 1002 may also be called a register, cache, main memory (main storage device), or the like.
  • the storage device 1002 can store executable programs (program code), software modules, etc. for implementing the communication method according to an embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
  • the storage medium described above may be, for example, a database, server, or other suitable medium including at least one of storage device 1002 and secondary storage device 1003 .
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • the transceiver may be physically or logically separate implementations for the transmitter and receiver.
  • the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
  • the output device 1006 is an output device (for example, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • Each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
  • the base station 10 and the terminal 20 include hardware such as microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), and FPGAs (Field Programmable Gate Arrays). , and part or all of each functional block may be implemented by the hardware.
  • processor 1001 may be implemented using at least one of these pieces of hardware.
  • a vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029. , an information service unit 2012 and a communication module 2013 .
  • a communication device mounted on vehicle 2001 may be applied to communication module 2013, for example.
  • the driving unit 2002 is configured by, for example, an engine, a motor, or a hybrid of the engine and the motor.
  • the steering unit 2003 includes at least a steering wheel (also referred to as steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
  • the electronic control unit 2010 is composed of a microprocessor 2031 , a memory (ROM, RAM) 2032 and a communication port (IO port) 2033 . Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010 .
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • the signals from the various sensors 2021 to 2029 include the current signal from the current sensor 2021 that senses the current of the motor, the rotation speed signal of the front and rear wheels acquired by the rotation speed sensor 2022, and the front wheel acquired by the air pressure sensor 2023. and rear wheel air pressure signal, vehicle speed signal obtained by vehicle speed sensor 2024, acceleration signal obtained by acceleration sensor 2025, accelerator pedal depression amount signal obtained by accelerator pedal sensor 2029, brake pedal sensor 2026 obtained by There are a brake pedal depression amount signal, a shift lever operation signal acquired by the shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028, and the like.
  • the information service unit 2012 includes various devices such as car navigation systems, audio systems, speakers, televisions, and radios for providing various types of information such as driving information, traffic information, and entertainment information, and one or more devices for controlling these devices. ECU.
  • the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide passengers of the vehicle 2001 with various multimedia information and multimedia services.
  • Driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), camera, positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, automatic driving vehicle (AV) map, etc. ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, AI processors, etc., to prevent accidents and reduce the driver's driving load. and one or more ECUs for controlling these devices.
  • the driving support system unit 2030 transmits and receives various information via the communication module 2013, and realizes a driving support function or an automatic driving function.
  • the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via communication ports.
  • the communication module 2013 communicates with the vehicle 2001 through the communication port 2033, the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axle 2009, the electronic Data is transmitted and received between the microprocessor 2031 and memory (ROM, RAM) 2032 in the control unit 2010 and the sensors 2021-29.
  • the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from an external device via wireless communication.
  • Communication module 2013 may be internal or external to electronic control unit 2010 .
  • the external device may be, for example, a base station, a mobile station, or the like.
  • the communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication.
  • the communication module 2013 receives the rotation speed signal of the front and rear wheels obtained by the rotation speed sensor 2022, the air pressure signal of the front and rear wheels obtained by the air pressure sensor 2023, and the vehicle speed sensor. 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, and a shift lever.
  • a shift lever operation signal obtained by the sensor 2027 and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028 are also transmitted to an external device via wireless communication.
  • the communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices, and displays it on the information service unit 2012 provided in the vehicle 2001 .
  • Communication module 2013 also stores various information received from external devices in memory 2032 available to microprocessor 2031 .
  • the microprocessor 2031 controls the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, and the axle 2009 provided in the vehicle 2001.
  • sensors 2021 to 2029 and the like may be controlled.
  • the base station 10 can determine necessary parameters in the new frequency band, perform LBT, and perform multi-channel access procedures. That is, a multi-channel access procedure can be performed in a wireless communication system.
  • the communication unit may perform LBT in each of the plurality of channels using an independent contention window in each of the plurality of channels or a maximum contention window among the plurality of channels.
  • the base station 10 can determine necessary parameters and perform LBT in the new frequency band to perform multi-channel access procedures.
  • the communication unit may first perform channel access in a certain channel among the plurality of channels, and then perform channel access in another channel among the plurality of channels.
  • the base station 10 can determine necessary parameters and perform LBT in the new frequency band to perform multi-channel access procedures.
  • the control unit may initialize the counter value of a specific channel among the plurality of channels when transmission is stopped in any of the channels after transmission is performed in the plurality of channels.
  • the base station 10 can determine necessary parameters and perform LBT in the new frequency band to perform multi-channel access procedures.
  • the control unit initializes the counter values of all of the plurality of channels when transmission is stopped on any of the channels after transmission is performed on the plurality of channels, or may be initialized for the channel that stopped the counter value.
  • the base station 10 can determine necessary parameters and perform LBT in the new frequency band to perform multi-channel access procedures.
  • a control procedure for determining a multi-channel access procedure with LBT (Listen before talk), and LBT based on the determined multi-channel access procedure to execute in a plurality of channels determining the maximum value of a range of counter values that determine the length of a period constituting a contention window applied to the communication procedure and the determined multi-channel access procedure; and determining the contention window based on the maximum value.
  • a communication method is provided in which a base station performs a step of determining a .
  • the base station 10 can determine necessary parameters in the new frequency band, perform LBT, and perform multi-channel access procedures. That is, a multi-channel access procedure can be performed in a wireless communication system.
  • 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.
  • the notification of information 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) , broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • the RRC signaling may also be called an RRC message, such as an 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
  • other network nodes 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 (eg, 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 device fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
  • 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 a base station subsystem (e.g., an indoor small base station (RRH: Communication services can also be provided by Remote Radio Head)).
  • RRH indoor small base station
  • the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station is defined by those skilled in the art as 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);
  • "judgment” and “determination” are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment” or “decision” has been made.
  • judgment and “decision” are considered to be “judgment” and “decision” by resolving, selecting, choosing, establishing, comparing, etc. can contain.
  • judgment and “decision” may include considering that some action is “judgment” and “decision”.
  • judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
  • connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
  • two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may also be called Pilot depending on the applicable standard.
  • RS Reference Signal
  • any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not imply that only two elements can be employed or that the first element must precede the second element in any way.
  • a radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of numerology.
  • a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.
  • a slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
  • a slot may be a unit of time based on numerology.
  • a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
  • 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
  • TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • one slot or one minislot may be called a TTI.
  • TTI Transmission Time Interval
  • at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum scheduling time unit in wireless communication.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis.
  • radio resources frequency bandwidth, transmission power, etc. that can be used by each terminal 20
  • TTI is not limited to this.
  • a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
  • a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • the short TTI e.g., shortened TTI, etc.
  • a TTI having the above TTI length may be read instead.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
  • the number of subcarriers included in an RB may be determined based on numerology.
  • the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long.
  • One TTI, one subframe, etc. may each consist of one or more resource blocks.
  • One or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. may be called.
  • PRBs physical resource blocks
  • SCGs sub-carrier groups
  • REGs resource element groups
  • PRB pairs RB pairs, etc. may be called.
  • a resource block may be composed of one or more resource elements (RE: Resource Element).
  • RE Resource Element
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a bandwidth part (which may also be called a bandwidth part) may represent a subset of contiguous common resource blocks (RBs) for a certain numerology on a certain carrier.
  • the common RB may be identified by an RB index based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or multiple BWPs may be configured for a UE within one carrier.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
  • BWP bitmap
  • radio frames, subframes, slots, minislots and symbols are only examples.
  • the number of subframes contained in a radio frame the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.
  • CP cyclic prefix
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean that "A and B are different from C”.
  • Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
  • notification of predetermined information is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne une station de base qui comprend une unité de commande qui détermine une procédure d'accès multicanal impliquant un processus de procédure « écouter avant de parler » (LBT), et une unité de communication qui exécute le processus de procédure LBT dans de multiples canaux sur la base de la procédure d'accès multicanal déterminée. L'unité de commande détermine la valeur maximale de la plage de contre-valeurs pour déterminer la longueur de la période d'une fenêtre de contention à appliquer à la procédure d'accès multicanal déterminée, et détermine la fenêtre de contention sur la base de la valeur maximale.
PCT/JP2022/005760 2022-02-14 2022-02-14 Station de base et procédé de communication WO2023152988A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210195639A1 (en) * 2016-01-29 2021-06-24 Lg Electronics Inc. Method for adjusting downlink lbt parameter, in wireless communication system supporting unlicensed band, and device for supporting same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210195639A1 (en) * 2016-01-29 2021-06-24 Lg Electronics Inc. Method for adjusting downlink lbt parameter, in wireless communication system supporting unlicensed band, and device for supporting same

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Title
MODERATOR (QUALCOMM INCORPORATED): "FL summary of channel access mechanism for 52.6GHz-71GHz band, ver03", 3GPP DRAFT; R1-2200803, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. 20210117 - 20210125, 25 January 2022 (2022-01-25), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052103230 *
ZTE, SANECHIPS: "Remaining issues on the channel access for 52.6 to 71GHz", 3GPP DRAFT; R1-2200264, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20220117 - 20220125, 11 January 2022 (2022-01-11), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052093083 *

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