WO2023238281A1 - 端末及び測定方法 - Google Patents

端末及び測定方法 Download PDF

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Publication number
WO2023238281A1
WO2023238281A1 PCT/JP2022/023120 JP2022023120W WO2023238281A1 WO 2023238281 A1 WO2023238281 A1 WO 2023238281A1 JP 2022023120 W JP2022023120 W JP 2022023120W WO 2023238281 A1 WO2023238281 A1 WO 2023238281A1
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WO
WIPO (PCT)
Prior art keywords
base station
terminal
frequency
positioning reference
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/023120
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English (en)
French (fr)
Japanese (ja)
Inventor
真哉 岡村
知也 小原
康介 島
浩樹 原田
春陽 越後
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NTT Docomo Inc
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NTT Docomo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to PCT/JP2022/023120 priority Critical patent/WO2023238281A1/ja
Priority to JP2024526116A priority patent/JPWO2023238281A1/ja
Publication of WO2023238281A1 publication Critical patent/WO2023238281A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present invention relates to a terminal and a measurement method in a wireless communication system.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • a successor system to LTE is also being considered with the aim of further increasing the bandwidth and speed of LTE.
  • Successor systems to LTE include, for example, LTE-Advanced (LTE-A), Future Radio Access (FRA), 5th generation mobile communication system (5G), 5G plus (5G+), Radio Access Technology (New-RAT), New There is a system called Radio (NR).
  • Non-Patent Document 1 various wireless technologies and network architectures are being studied in order to meet the requirements of achieving a throughput of 10 Gbps or more and reducing the delay in the wireless section to 1 ms or less (for example, see Non-Patent Document 1). ).
  • NR positioning enhancement of positioning (NR positioning) of UE (User Equipment) in NR is being considered (for example, see Non-Patent Document 2).
  • CPM carrier phase measurements
  • Carrier wave phase measurement calculates the distance between the transmitting point and the receiving point by measuring the phase information of the carrier wave. Therefore, it is envisaged that the bandwidth of the carrier wave will be reduced compared to, for example, a reference signal used for timing-based positioning. However, a reference signal suitable for carrier phase measurement has not been defined.
  • the present invention has been made in view of the above points, and allows a positioning reference signal suitable for carrier phase measurement to be used in a wireless communication system.
  • the receiver includes a receiving unit that receives a downlink positioning reference signal from a base station, and a control unit that performs carrier phase measurement based on the downlink positioning reference signal,
  • the receiving unit is provided with a terminal that does not receive the downlink positioning reference signals allocated to some frequency resources among the downlink positioning reference signals set from the base station.
  • a positioning reference signal suitable for carrier phase measurement can be used in a wireless communication system.
  • FIG. 1 is a diagram showing a configuration example of a wireless communication system according to an embodiment of the present invention.
  • FIG. 3 is a diagram for explaining an example (1) of positioning by carrier phase measurement.
  • FIG. 7 is a diagram for explaining an example (2) of positioning using carrier phase measurement.
  • FIG. 3 is a diagram showing an example (1) of DL-PRS in an embodiment of the present invention.
  • FIG. 7 is a diagram showing an example (2) of DL-PRS in the embodiment of the present invention.
  • FIG. 7 is a diagram showing an example (3) of DL-PRS in the embodiment of the present invention.
  • FIG. 7 is a diagram showing an example (4) of DL-PRS in the embodiment of the present invention.
  • FIG. 7 is a diagram showing an example (5) of DL-PRS in the embodiment of the present invention.
  • FIG. 3 is a diagram for explaining an example (1) of positioning by carrier phase measurement.
  • FIG. 7 is a diagram for explaining an example (2) of positioning using carrier phase measurement.
  • FIG. 3 is
  • FIG. 7 is a diagram showing an example (6) of DL-PRS in the embodiment of the present invention. It is a figure showing example (1) of positioning in an embodiment of the present invention. It is a figure which shows the example (2) of positioning in embodiment of this invention.
  • 1 is a diagram showing an example of a functional configuration of a base station 10 in an embodiment of the present invention. It is a diagram showing an example of a functional configuration of a terminal 20 in an embodiment of the present invention.
  • FIG. 2 is a diagram showing an example of the hardware configuration of a base station 10 or a terminal 20 in an embodiment of the present invention. It is a figure showing an example of composition of vehicle 2001 in an embodiment of the present invention.
  • LTE Long Term Evolution
  • NR system after LTE-Advanced
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (for example, Flexible Duplex, etc.). This method may also be used.
  • configure the wireless parameters etc. may mean pre-configuring a predetermined value, or may mean that the base station 10 or Wireless parameters notified from the terminal 20 may also be set.
  • FIG. 1 is a diagram illustrating 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 a terminal 20, as shown in FIG. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is just 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.
  • the physical resources of a radio signal are defined in the time domain and the frequency domain, and 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 resource blocks. Good too.
  • Base station 10 transmits a synchronization signal and system information to terminal 20.
  • the synchronization signals are, for example, NR-PSS and NR-SSS.
  • System information is transmitted, for example, on NR-PBCH, and is also referred to as broadcast information.
  • the synchronization signal and system information may be called SSB (SS/PBCH block). As shown in FIG.
  • the base station 10 transmits a control signal or data to the terminal 20 on the DL (Downlink), and receives the control signal or data from the terminal 20 on the UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Further, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Further, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell) and a primary cell (PCell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary SCG cell (PSCell) of another base station 10 using DC (Dual Connectivity).
  • SCell secondary cell
  • PCell primary cell
  • DC Direct Connectivity
  • the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 via DL, and transmits control signals or data to the base station 10 via UL, thereby receiving various types of information provided by the wireless communication system. Use communication services. Furthermore, the terminal 20 receives various reference signals transmitted from the base station 10, and measures the channel quality based on the reception results of the reference signals.
  • a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine).
  • M2M Machine-to-Machine
  • FIG. 2 is a diagram for explaining an example (1) of positioning using carrier phase measurement.
  • Carrier phase measurement is a highly accurate positioning method using carrier phase, which is adopted in GNSS (Global Navigation Satellite System) and the like.
  • GNSS Global Navigation Satellite System
  • the distance between the reference point and the positioning point is determined using the number of carrier waves and the reception phase difference of the carrier waves.
  • the arrival distance L from the satellite to the receiver is calculated by carrier wave wavelength ⁇ wave number N+deviation ⁇ due to reception phase difference.
  • FIG. 3 is a diagram for explaining an example (2) of positioning using carrier phase measurement. As shown in FIG. 3, in the case of the L1 signal, there are about 500 N candidates 100 meters before and after the receiver.
  • the distance between a transmitting point and a receiving point is calculated by measuring the phase information of the carrier wave, so it is assumed that the bandwidth of the carrier wave is relatively small.
  • timing-based measurements such as TDOA (Time Difference of Arrival) and RTT (Round Trip Time) will also be used, so reducing the carrier wave bandwidth may affect positioning accuracy. can also be considered.
  • 3GPP Release 17NR DL-PRS Positioning Reference Signal
  • TRP Transmission and reception point
  • a muting function for UE-specific frequency resources of DL-PRS may be implemented.
  • the UE does not need to assume reception of some frequency resources among the configured DL-PRS resources or resource sets.
  • the UE may assume the timing to apply the muting pattern to DL-PRS measurement.
  • the UE may report the muting pattern notified from the gNB to the LMF (Location Management Function).
  • LMF Location Management Function
  • Operation 1 The UE does not need to assume reception of some frequency resources among the configured DL-PRS resources or resource sets. Note that in 3GPP Release 17, DL-PRS is set with a granularity of 4 PRBs from 24 to 272 PRBs. For example, the UE may operate as in option 1) or option 2) below.
  • bitmap may indicate muting.
  • bitmap may indicate muting.
  • "0” may indicate muting, or conversely, "1” may indicate muting.
  • FIG. 5 is a diagram showing an example (2) of DL-PRS in the embodiment of the present invention.
  • the example shown in FIG. 5 is an example where the DL-PRS is set to comb 2, 4 symbols, the muting granularity is set to 1 PRB, and a 4-bit bitmap [1,0,1,0] is set. It is.
  • the DL-PRS placed in the PRB corresponding to "1" is enabled, and the DL-PRS placed in the PRB corresponding to "0" is muted.
  • the muting shown in FIG. 5 may be repeated an arbitrary number of times in units of 4 PRBs, or may be applied only to 4 PRBs.
  • Option 2 It may be assumed that the UE is informed of the muting position by the base station 10 via multiple parameters, such as frequency muting offset, frequency muting start position and end position, etc. Furthermore, the UE may assume that the muting granularity is informed by the base station 10.
  • the UE may assume the following 1)-4).
  • the muting granularity may be assumed to be 1 RE, N_r REs, 1 PRB, that is, 12 REs, 4 PRBs, N_p PRBs, etc.
  • N_r and N_p may be assumed to be set, updated, or notified to the UE through RRC signaling, MAC-CE, or DCI, or may be defined in the specifications.
  • FIG. 8 is a diagram showing an example (5) of DL-PRS in the embodiment of the present invention.
  • the example shown in FIG. 8 is an example in which the muting granularity is set to 1RE, the frequency muting start position is set to 0, and the frequency muting end position is set to 4 when the DL-PRS is set to comb 2 and 4 symbols. .
  • DL-PRS arranged from the 0th RE to the 4th RE are muted. Note that the muting shown in FIG. 8 may be repeated an arbitrary number of times for each PRB, or may be applied only to one PRB.
  • FIG. 9 is a diagram showing an example (6) of DL-PRS in the embodiment of the present invention.
  • the example shown in FIG. 9 is an example in which the muting granularity is set to 1 PRB, the frequency muting start position is set to 0, and the frequency muting end position is set to 4 when the DL-PRS is set to comb 2 and 4 symbols. .
  • DL-PRS arranged from the 0th PRB to the 4th PRB are muted.
  • the UE may envisage switching between the operations of option 1) and option 2) described above. For example, the UE may assume that it is informed via RRC signaling, MAC-CE or DCI to apply either option 1) or option 2).
  • the DL-PRS specifies frequency resources for each UE. Reception becomes possible.
  • the UE may assume the timing to apply the muting pattern to DL-PRS measurement.
  • the muting pattern is applied to a DL-PRS resource set (for example, a measurement instance) or a measurement report (MR) after the time the muting pattern is received.
  • a DL-PRS resource set for example, a measurement instance
  • MR measurement report
  • the UE may assume that the timing for applying the muting pattern is set by the network, or the timing may be specified in the specifications.
  • N_s may be assumed to be set, updated, or notified to the UE through RRC signaling, MAC-CE, or DCI, or may be defined in the specifications.
  • the UE may determine the application timing of the muting pattern as in option A), option B), or option C) below, based on the opportunity to receive signaling of the muting pattern. For example, if the UE receives a muting pattern after receiving a request for a measurement report but before transmitting the measurement report, the UE may determine the application timing of the muting pattern.
  • the UE may apply the muting pattern to the next DL-PRS resource set upon receiving the muting pattern signaling. Further, the UE may apply the muting pattern to N_rs subsequent DL-PRS resource sets at the time of receiving the muting pattern signaling. N_rs may be assumed to be configured, updated, or notified to the UE through RRC signaling, MAC-CE, or DCI, or may be defined in the specifications.
  • the UE may apply the muting pattern to the next measurement report after receiving the muting pattern signaling. Furthermore, the UE may apply the muting pattern to N_mr measurement reports after receiving the muting pattern signaling.
  • N_mr may be assumed to be set, updated, or notified to the UE through RRC signaling, MAC-CE, or DCI, or may be defined in the specifications.
  • option C) Both option A) and option B) above are specified and the UE may assume either option is configured.
  • FIG. 10 is a diagram showing an example (1) of positioning in the embodiment of the present invention.
  • Case 1 shown in FIG. 10 is a case where a muting pattern is received after receiving a measurement report request but before transmitting the measurement report.
  • Case 1A shown in FIG. 10 corresponds to option A) above. That is, the UE may apply the muting pattern to the next DL-PRS resource set at the time of receiving the muting pattern signaling.
  • case 1B shown in FIG. 10 corresponds to option B) above. That is, the UE may apply the muting pattern to the next measurement report after receiving the muting pattern signaling.
  • the UE may determine the timing to apply the muting pattern.
  • FIG. 11 is a diagram showing an example (2) of positioning in the embodiment of the present invention.
  • Case 2 shown in FIG. 11 is a case where a muting pattern is received before receiving a request for a measurement report.
  • the UE may apply the signaled muting pattern to the next DL-PRS resource set. However, the signaled muting pattern may be applied to the next measurement report.
  • the above operation 2) allows the muting pattern to be applied at appropriate timing when the UE measures DL-PRS.
  • the UE may report the muting pattern notified from the gNB to the LMF.
  • the UE may report the muting pattern notified from the gNB to the LMF in assistance data.
  • the UE does not need to assume that it will report the notified muting pattern to the LMF. If the UE does not report the muting pattern to the LMF, the LMF may assume that the gNB informs the muting pattern via assistance information.
  • the above operation 3) enables the LMF to utilize the muting pattern for calculating the UE location.
  • the UE may signal the UE capability for frequency muting to the network.
  • the UE capabilities may assume some or all of 1) to 7) below.
  • Carrier Phase Measurement may be replaced with Carrier Phase Positioning (CPP), Phase-based Positioning (PP), etc.
  • signaling may be replaced with “set by RRC”, “activate/deactivate/update by MAC-CE”, “notify by DCI”, etc.
  • Measurement report request is Measurement request, Location request, Location information request. It may be read as est etc.
  • Frequency muting may be read as Frequency resource muting, Dynamic DL-PRS indication, etc.
  • AD Assistance Data
  • AI Assistance information
  • AD Assist Data
  • AI Assistant Information
  • muting in the above operations 2) and 3) may mean only frequency muting, or may mean muting in the time domain or muting in the symbol direction.
  • a positioning reference signal suitable for carrier phase measurement can be used.
  • Base station 10 and terminal 20 include functionality to implement the embodiments described above. However, the base station 10 and the terminal 20 may each have only some of the functions in the embodiment.
  • control unit 140 performs control related to positioning settings. Further, the control unit 140 executes scheduling. A functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.
  • the transmitter 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and obtains higher layer signals from the received physical layer signals. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, etc. transmitted from the base station 10.
  • the transmitter 210 transmits a PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) to another terminal 20 as D2D communication.
  • the receiving unit 220 receives PSCCH, PSSCH, PSDCH, PSBCH, etc. from other terminals 20 .
  • control unit 240 performs control related to positioning settings.
  • a functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, These include, but are not limited to, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. I can't.
  • a functional block (configuration unit) that performs transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.
  • the word “apparatus” can be read as a circuit, a device, a unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.
  • 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 in accordance with these.
  • programs program codes
  • the control unit 140 of the base station 10 shown in FIG. 12 may be realized by a control program stored in the storage device 1002 and operated on the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 13 may be realized by a control program stored in the storage device 1002 and operated on the processor 1001.
  • Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunications line.
  • the storage device 1002 is a computer-readable recording medium, such as at least one of 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 be called a register, cache, main memory, or the like.
  • the storage device 1002 can store executable programs (program codes), software modules, and the like to implement a communication method according to an embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, such as 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, etc.). -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, etc.
  • the above-mentioned storage medium may be, for example, a database including at least one of the storage device 1002 and the auxiliary storage device 1003, a server, or other suitable medium.
  • 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 for each device.
  • the base station 10 and the terminal 20 also include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA).
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • a part or all of each functional block may be realized by the hardware.
  • processor 1001 may be implemented using at least one of these hardwares.
  • the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and 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).
  • Signals from various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the motor current, a front wheel or rear wheel rotation speed signal obtained by a rotation speed sensor 2022, and a front wheel rotation speed signal obtained by an air pressure sensor 2023. Or a rear wheel air pressure signal, a vehicle speed signal acquired by the vehicle speed sensor 2024, an acceleration signal acquired by the acceleration sensor 2025, an accelerator pedal depression amount signal acquired by the accelerator pedal sensor 2029, or a brake pedal sensor 2026. These include a brake pedal depression amount signal, a shift lever operation signal acquired by the shift lever sensor 2027, a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028, and the like.
  • the information service department 2012 controls various devices such as car navigation systems, audio systems, speakers, televisions, and radios that provide (output) various information such as driving information, traffic information, and entertainment information, and these devices. It is composed of one or more ECUs.
  • the information service unit 2012 provides various multimedia information and multimedia services to the occupants of the vehicle 2001 using information acquired from an external device via the communication module 2013 and the like.
  • the information service department 2012 may include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accepts input from the outside, and an output device that performs output to the outside (for example, display, speaker, LED lamp, touch panel, etc.).
  • the driving support system unit 2030 includes a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (for example, GNSS, etc.), map information (for example, a high-definition (HD) map, an autonomous vehicle (AV) map, etc.) ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors that prevent accidents and reduce the driver's driving burden.
  • the system is comprised of various devices that provide functions for the purpose and one or more ECUs that control these devices. Further, 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.
  • Communication module 2013 can communicate with microprocessor 2031 and components of vehicle 2001 via a communication port.
  • the communication module 2013 communicates with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, electronic Data is transmitted and received between the microprocessor 2031, memory (ROM, RAM) 2032, and sensors 2021 to 29 in the control unit 2010.
  • 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 external devices. For example, various information is transmitted and received with an external device via wireless communication.
  • the communication module 2013 may be located either inside or outside the electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, or the like.
  • the communication module 2013 receives signals from the various sensors 2021 to 2028 described above that are input to the electronic control unit 2010, information obtained based on the signals, and input from the outside (user) obtained via the information service unit 2012. At least one of the information based on the information may be transmitted to an external device via wireless communication.
  • the electronic control unit 2010, various sensors 2021-2028, information service unit 2012, etc. may be called an input unit that receives input.
  • the PUSCH transmitted by the communication module 2013 may include information based on the above input.
  • the terminal 20 can mute the reception of DL-PRS as necessary to achieve power saving when performing carrier wave phase measurement. That is, in a wireless communication system, a positioning reference signal suitable for carrier phase measurement can be used.
  • the receiving unit may receive a bitmap and granularity indicating a frequency muting pattern from the base station as information indicating the frequency muting pattern.
  • the receiving unit may receive an offset and a length indicating the frequency muting pattern, or a start position and an end position indicating the frequency muting pattern from the base station, as information indicating the frequency muting pattern.
  • the operations of a plurality of functional sections may be physically performed by one component, or the operations of one functional section may be physically performed by a plurality of components.
  • the order of processing may be changed as long as there is no contradiction.
  • Software operated by the processor included in the base station 10 according to the embodiment of the present invention and software operated by the processor included in the terminal 20 according to the embodiment of the present invention are respectively random access memory (RAM), flash memory, and read-only memory. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.
  • the information, signals, etc. described in this disclosure can be output from an upper layer (or lower layer) to a lower layer (or upper layer). It may be input/output via multiple network nodes.
  • the input/output information may be stored in a specific location (for example, memory) or may be managed using a management table. Information etc. to be input/output may be overwritten, updated, or additionally written. The output information etc. may be deleted. The input information etc. may be transmitted to other devices.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of
  • At least one of the channel and the symbol may be a signal.
  • the signal may be a message.
  • a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
  • radio resources may be indicated by an index.
  • a mobile station is defined by a person 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 referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applied standard.
  • RS Reference Signal
  • a radio frame may be composed of one or more frames in the time domain. Each frame or frames in the time domain may be called a subframe. A subframe may also be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter applied to the transmission and/or reception of a certain signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, and transmitter/receiver. It may also indicate at least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • transmitter/receiver transmitter/receiver. It may also indicate at least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like.
  • a slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain.
  • a slot may be a unit of time based on numerology.
  • a slot may include multiple mini-slots. Each minislot may be made up of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up 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.
  • 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 one minislot may be called a TTI. It's okay.
  • at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be.
  • the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.
  • TTI refers to, for example, the minimum time unit for scheduling in wireless communication.
  • a 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.
  • the TTI may be a transmission time unit of a channel-coded data packet (transport block), a code block, a codeword, etc., or may be a processing unit of scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling.
  • the number of slots (minislot number) that constitutes 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, etc.
  • TTI that is shorter than the normal TTI may be referred to as an abbreviated TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
  • long TTI for example, normal TTI, subframe, etc.
  • short TTI for example, short TTI, etc. It may also be read as a TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more continuous subcarriers in the frequency domain.
  • the number of subcarriers included in an 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 newerology.
  • the time domain of an RB may include one or more symbols, and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs include 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 configured by one or more resource elements (REs).
  • REs resource elements
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a bandwidth part (which may also be called a partial bandwidth or the like) may represent a subset of consecutive common resource blocks (RBs) for a certain numerology in a certain carrier.
  • the common RB may be specified by an RB index based on a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include a UL BWP (UL BWP) and a DL BWP (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be configured within one carrier for a UE.
  • 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 of the active BWP.
  • “cell”, “carrier”, etc. in the present disclosure may be replaced with "BWP”.
  • radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB, Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • a and B are different may mean “A and B are different from each other.” Note that the term may also mean that "A and B are each different from C”. Terms such as “separate” and “coupled” may also be interpreted similarly to “different.”
  • notification of prescribed information is not limited to being done explicitly, but may also be done implicitly (for example, not notifying the prescribed information). Good too.
  • Base station 110 Transmitting section 120 Receiving section 130 Setting section 140 Control section 20 Terminal 210 Transmitting section 220 Receiving section 230 Setting section 240 Control section 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
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KR20210017777A (ko) * 2019-08-09 2021-02-17 주식회사 케이티 차세대 무선망에서 주파수 영역 PRS muting 설정 방법 및 장치
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