WO2019212246A1 - Method and device for performing positioning in new radio network - Google Patents

Abstract

The present embodiments relate to a method and device for performing positioning in a new radio network. One embodiment provides a method for performing positioning by a terminal, the method comprising the steps of: receiving configuration information relating to subcarrier spacing within a frequency band through which a positioning reference signal (PRS) is transmitted; and receiving the positioning reference signal on the basis of the configuration information relating to the subcarrier spacing.

Description

Method and apparatus for performing positioning in next generation wireless network

The present disclosure proposes a method and apparatus for measuring the position of a terminal in a next generation wireless access network (hereinafter, referred to as "NR").

3GPP recently approved a study item "Study on New Radio Access Technology" for the study of next-generation radio access technology (that is, 5G radio access technology), and based on this, the RAN WG1 for each NR (New Radio) Design is underway for frame structures, channel coding and modulation, waveforms and multiple access schemes. The NR is required to be designed to satisfy various requirements required for each segmented and detailed usage scenario as well as an improved data rate compared to LTE.

As representative usage scenarios of NR, enhancement mobile broadband (eMBB), massive machine type communication (MMTC), and ultra reliable and low latency communications (URLLC) are raised, and flexible frame structure compared to LTE to satisfy the needs of each usage scenario. Design is required.

In particular, a flexible design for transmitting a positioning reference signal (PRS) is required to satisfy various use-cases and high requirements related to the location measurement of the UE required in the NR. It is true.

An object of the present disclosure, in performing the positioning in the next-generation wireless network, a specific configuration that can be flexibly set for each time interval or bandwidth part of the number (numerology) for the radio resources used for the transmission of the positioning reference signal To provide a method.

In addition, an object of the present disclosure is to perform a positioning in the next-generation wireless network, a specific method that can differently configure the numerology for the radio resources used for the transmission of the positioning reference signal based on the capability (capability) of the terminal To provide.

In addition, an object of the present disclosure is to perform positioning in the next-generation wireless network, a specific method that can transmit and receive the positioning reference signal even if the configuration information for the subcarrier spacing of the frequency band to which the positioning reference signal is transmitted is not received separately To provide.

In order to solve the above-described problem, an embodiment of the present invention provides a method for positioning by a terminal, and includes a subcarrier spacing of a frequency band in which a positioning reference signal (PRS) is transmitted. And receiving the positioning reference signal based on the setting information on the subcarrier spacing.

In addition, according to an embodiment of the present invention, a method of positioning by a base station includes: configuring configuration information on subcarrier spacing of a frequency band in which a positioning reference signal (PRS) is transmitted; And transmitting the positioning reference signal based on the setting information for the subcarrier spacing.

In addition, according to an embodiment, in a terminal performing positioning, the terminal receives configuration information on subcarrier spacing of a frequency band in which a Positioning Reference Signal (PRS) is transmitted and receives subcarrier spacing. A terminal including a receiver for receiving a positioning reference signal based on configuration information about spacing may be provided.

In addition, an embodiment of the present invention provides a base station that performs positioning, and includes a control unit and a sub which configure configuration information on subcarrier spacing of a frequency band in which a Positioning Reference Signal (PRS) is transmitted. A base station including a transmitter for transmitting a positioning reference signal based on configuration information on carrier spacing may be provided.

In addition, according to an embodiment of the present invention, a method for positioning by a terminal includes: receiving control information related to a downlink channel, wherein a positioning reference signal is transmitted with subcarrier spacing information of a frequency band in which the control information is received; The method may include determining the subcarrier spacing information of the frequency band and receiving the positioning reference signal based on the determined subcarrier spacing information.

In addition, according to an embodiment, a method for positioning by a base station includes: transmitting control information related to a downlink channel, and positioning reference signal is transmitted using subcarrier spacing information of a frequency band in which control information is transmitted; The method may include configuring subcarrier spacing information of a frequency band and transmitting a positioning reference signal based on the configured subcarrier spacing information.

In addition, according to an embodiment of the present invention, in a terminal performing positioning, a receiver for receiving control information related to a downlink channel and subcarrier spacing information of a frequency band in which control information is received may include a frequency band for transmitting a positioning reference signal. The control unit may be configured to determine subcarrier spacing information of the receiver, and the receiver may provide a terminal that receives the positioning reference signal based on the determined subcarrier spacing information.

In addition, according to an embodiment, a base station performing positioning includes a transmitter for transmitting control information related to a downlink channel and a subcarrier spacing information of a frequency band for transmitting control information, and a frequency band for transmitting a positioning reference signal. And a control unit configured of the subcarrier spacing information of the transmitter, and the transmitter may provide a base station transmitting the positioning reference signal based on the configured subcarrier spacing information.

According to the present disclosure, in performing positioning in a next-generation wireless network, by setting a flexible number for a time interval or a bandwidth part for a radio resource used for transmitting a positioning reference signal in NR, It is possible to provide a reporting resolution for the positioning reference signal suitable for various usage scenarios required.

In addition, according to the present disclosure, in performing positioning in a next-generation wireless network, a situation of a terminal is configured by differently configuring a radio resource for a radio resource used for transmission of a positioning reference signal based on the capability of the terminal. This can provide an appropriate reporting resolution.

In addition, according to the present disclosure, in performing positioning in a next-generation wireless network, by transmitting a positioning reference signal using subcarrier spacing information for a frequency band in which predetermined control information is received, a frequency band in which the positioning reference signal is transmitted. Even if the configuration information for the subcarrier spacing is not separately received, the positioning reference signal can be transmitted and received.

1 is a diagram schematically illustrating a structure of an NR wireless communication system to which an embodiment may be applied.

2 is a diagram illustrating a frame structure in an NR system to which an embodiment may be applied.

3 is a diagram illustrating a resource grid supported by a radio access technology to which an embodiment can be applied.

FIG. 4 is a diagram for describing a bandwidth part supported by a radio access technology to which an embodiment can be applied.

5 is a diagram exemplarily illustrating a synchronization signal block in a radio access technology to which an embodiment may be applied.

FIG. 6 is a diagram for explaining a random access procedure in a radio access technology to which an embodiment can be applied.

7 is a diagram for explaining a CORESET to which an embodiment can be applied.

FIG. 8 illustrates an example of symbol level alignment for different SCSs to which an embodiment may be applied.

9 is a diagram illustrating an LTE-A CSI-RS structure to which an embodiment can be applied.

FIG. 10 illustrates NR component CSI-RS RE patterns to which an embodiment may be applied. FIG.

11 is a diagram illustrating NR CDM patterns to which an embodiment may be applied.

12 illustrates mapping of positioning reference signals (normal cyclic prefix) to which an embodiment may be applied.

13 is a conceptual diagram of OTDOA-based positioning in which an embodiment may be applied.

14 is a diagram illustrating a procedure of performing positioning by a terminal according to an embodiment.

15 is a diagram illustrating a procedure of performing positioning by a base station according to an embodiment.

16 to 19 are diagrams for describing a positioning reference signal transmitted according to different numerology according to an embodiment.

FIG. 20 is a diagram for describing a setting of a numerology for each time period in which a positioning reference signal is transmitted, according to an exemplary embodiment.

21 is a diagram illustrating an example of configuration information of a location reference signal including bandwidth part index information and neuralology information according to an embodiment.

FIG. 22 is a diagram for describing a configuration of a numerology for each bandwidth part in which a positioning reference signal is transmitted, according to an embodiment.

23 is a diagram illustrating a configuration of a user terminal according to another embodiment.

24 is a diagram illustrating a configuration of a base station according to another embodiment.

25 is a diagram illustrating a procedure of performing positioning by a terminal according to another embodiment.

26 is a diagram illustrating a procedure for positioning by a base station according to another embodiment.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are shown in different drawings. In addition, in describing the technical idea, when it is determined that a detailed description of a related well-known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In addition, in describing the components of the exemplary embodiments, terms such as first, second, A, B, (a), and (b) may be used. These terms are only to distinguish the components from other components, and the terms are not limited in nature, order, order, or number of the components. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but between components It is to be understood that the elements may be "interposed" or each component may be "connected", "coupled" or "connected" through other components.

In addition, terms and technical names used in the present specification are for explaining a specific embodiment, and technical ideas are not limited to the terms. Unless otherwise defined, the terms described below may be interpreted as meanings generally understood by those skilled in the art to which the technical idea belongs. When the term is an incorrect technical term that does not accurately express the technical idea, it should be replaced with a technical term that can be understood by those skilled in the art. In addition, the general terms used herein should be interpreted as defined in the dictionary, or according to the context before and after, and should not be interpreted in an excessively reduced sense.

The wireless communication system herein refers to a system for providing various communication services such as voice and data packets using radio resources, and may include a terminal, a base station, and a core network.

The embodiments disclosed below may be applied to a wireless communication system using various wireless access technologies. For example, the embodiments of the present invention may include code division multiple access (CDMA), frequency division multiple access (FDMA), timedivision multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA). It can be applied to various radio access technologies, such as. CDMA may be implemented by a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented in a wireless technology such as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented in wireless technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), and the like. IEEE 802.16m is an evolution of IEEE 802.16e and provides backward compatibility with systems based on IEEE 802.16e. UTRA is part of a universal mobile telecommunications system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is part of evolved UMTS (E-UMTS) using evolved-UMTS terrestrial radio access (E-UTRA), employing OFDMA in downlink and SC- in uplink FDMA is adopted. As such, the embodiments may be applied to a wireless access technology that is currently disclosed or commercialized, and may be applied to a wireless access technology that is currently under development or will be developed in the future.

Meanwhile, the terminal in the present specification is a comprehensive concept of a device including a wireless communication module for communicating with a base station in a wireless communication system, and includes a UE in WCDMA, LTE, HSPA, and IMT-2020 (5G or New Radio). (User Equipment), of course, should be interpreted as a concept that includes a mobile station (MS), a user terminal (UT), a subscriber station (SS), a wireless device, and the like in GSM. In addition, the terminal may be a user portable device such as a smart phone according to a usage form, and may mean a vehicle, a device including a wireless communication module in a vehicle, and the like in a V2X communication system. In addition, in the case of a machine type communication (Machine Type Communication) system may mean an MTC terminal, an M2M terminal equipped with a communication module to perform machine type communication.

A base station or a cell of the present specification refers to an end point that communicates with a terminal in terms of a network, and includes a Node-B, an evolved Node-B, an eNB, a gNode-B, a Low Power Node, and an LPN. Sector, site, various types of antenna, base transceiver system (BTS), access point, access point (for example, transmission point, reception point, transmission point and reception point), relay node ), A mega cell, a macro cell, a micro cell, a pico cell, a femto cell, a remote radio head (RRH), a radio unit (RU), and a small cell. In addition, the cell may mean a bandwidth part (BWP) set in the terminal. For example, the serving cell may mean an activation BWP of the terminal.

Since the various cells listed above have a base station for controlling each cell, the base station may be interpreted in two meanings. 1) the device providing the mega cell, the macro cell, the micro cell, the pico cell, the femto cell, the small cell in relation to the wireless area, or 2) the wireless area itself. In 1) all devices that provide a given radio area are controlled by the same entity or interact with each other to cooperatively configure the radio area to the base station. According to the configuration of the wireless area, a point, a transmission point, a transmission point, a reception point, and the like become one embodiment of a base station. In 2), the base station may indicate the radio area itself that receives or transmits a signal from the viewpoint of the user terminal or the position of a neighboring base station.

In the present specification, a cell refers to a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.

Uplink (UL, or uplink) means a method for transmitting and receiving data to the base station by the terminal, downlink (Downlink, DL, or downlink) means a method for transmitting and receiving data to the terminal by the base station do. Downlink (downlink) may mean a communication or communication path from the multiple transmission and reception points to the terminal, uplink (uplink) may mean a communication or communication path from the terminal to the multiple transmission and reception points. In this case, in the downlink, the transmitter may be part of multiple transmission / reception points, and the receiver may be part of the terminal. In addition, in uplink, a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.

Uplink and downlink transmit and receive control information through a control channel such as a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), and the like. Data is transmitted and received by configuring the same data channel. Hereinafter, a situation in which a signal is transmitted and received through a channel such as PUCCH, PUSCH, PDCCH, and PDSCH is described as 'transmit and receive PUCCH, PUSCH, PDCCH, and PDSCH'. do.

For clarity, the following description focuses on the 3GPP LTE / LTE-A / NR (New RAT) communication system, but the technical features are not limited thereto.

After researching 4G (4th-Generation) communication technology, 3GPP is conducting research on 5G (5th-Generation) communication technology to meet the requirements of ITU-R next generation wireless access technology. Specifically, 3GPP is conducting research on a new NR communication technology separate from LTE-A pro and 4G communication technology, in which LTE-Advanced technology is enhanced to meet the requirements of ITU-R as 5G communication technology. LTE-A pro and NR both appear to be submitted in 5G communication technology, but for the convenience of description, the following describes the embodiments of the present invention mainly on NR.

Operational scenarios in NR defined various operational scenarios by adding considerations to satellites, automobiles, and new verticals in the existing 4G LTE scenarios.In terms of services, they have eMBB (Enhanced Mobile Broadband) scenarios and high terminal density. Supports a range of mass machine communication (MMTC) scenarios that require low data rates and asynchronous connections, and Ultra Reliability and Low Latency (URLLC) scenarios that require high responsiveness and reliability and support high-speed mobility. .

In order to satisfy this scenario, NR discloses a wireless communication system using a new waveform and frame structure technology, low latency technology, mmWave support technology, and forward compatible technology. In particular, the NR system proposes various technological changes in terms of flexibility to provide forward compatibility. The main technical features will be described below with reference to the drawings.

1 is a diagram schematically illustrating a structure of an NR system to which the present embodiment may be applied.

Referring to FIG. 1, an NR system is divided into a 5G core network (5GC) and an NR-RAN part, and the NG-RAN controls a user plane (SDAP / PDCP / RLC / MAC / PHY) and a user equipment (UE). It consists of gNB and ng-eNBs providing a planar (RRC) protocol termination. The gNB interconnects or gNBs and ng-eNBs are interconnected via an Xn interface. gNB and ng-eNB are each connected to 5GC through the NG interface. The 5GC may be configured to include an access and mobility management function (AMF) that is in charge of a control plane such as a terminal access and mobility control function, and a user plane function (UPF), which is in charge of a control function in user data. NR includes support for sub-6 GHz frequency bands (FR1, Frequency Range 1) and 6 GHz and higher frequency bands (FR2, Frequency Range 2).

gNB means a base station providing the NR user plane and control plane protocol termination to the terminal, ng-eNB means a base station providing the E-UTRA user plane and control plane protocol termination to the terminal. The base station described in the present specification should be understood to mean gNB and ng-eNB, and may be used to mean gNB or ng-eNB.

In NR, a CP-OFDM waveform using a cyclic prefix is used for downlink transmission, and a CP-OFDM or DFT-s-OFDM is used for uplink transmission. OFDM technology is easy to combine with Multiple Input Multiple Output (MIMO), and has the advantage of using a low complexity receiver with high frequency efficiency.

On the other hand, in NR, since the requirements for data rate, delay rate, and coverage are different for each of the three scenarios described above, it is necessary to efficiently satisfy the requirements for each scenario through a frequency band constituting an arbitrary NR system. . To this end, a technique for efficiently multiplexing a plurality of different numerology-based radio resources has been proposed.

Specifically, the NR transmission neuron is determined based on sub-carrier spacing and cyclic prefix (CP), and μ is used as an exponential value of 2 based on 15khz as shown in Table 1 below. Is changed to

μ	Subcarrier spacing	Cyclic prefix	Supported for data	Supported for synch
0	15	Normal	Yes	Yes
One	30	Normal	Yes	Yes
2	60	Normal, Extended	Yes	No
3	120	Normal	Yes		Yes
4	240	Normal	No	Yes

As shown in Table 1, the NR's pneumoroller may be classified into five types according to the subcarrier spacing. This is different from the fixed subcarrier spacing of LTE, which is one of 4G communication technologies, to be 15 kHz. Specifically, the subcarrier spacing used for data transmission in NR is 15, 30, 60, 120khz, and the subcarrier spacing used for synchronization signal transmission is 15, 30, 12, 240khz. In addition, the extended CP is applied only to the 60khz subcarrier interval. On the other hand, the frame structure (frame) in NR is a frame having a length of 10ms consisting of 10 subframes having the same length of 1ms is defined. One frame may be divided into half frames of 5 ms, and each half frame includes five subframes. In the case of a 15khz subcarrier interval, one subframe consists of one slot, and each slot consists of 14 OFDM symbols. 2 is a view for explaining a frame structure in an NR system to which the present embodiment can be applied. Referring to FIG. 2, the slot is fixedly configured with 14 OFDM symbols in the case of a normal CP, but the length of the slot may vary depending on the subcarrier spacing. For example, in the case of a newerology with a 15khz subcarrier spacing, the slot has a length of 1 ms and the same length as the subframe. On the contrary, in the case of a numerology having a 30khz subcarrier spacing, the slot includes 14 OFDM symbols, but two slots may be included in one subframe with a length of 0.5 ms. That is, the subframe and the frame are defined with a fixed time length, the slot is defined by the number of symbols, the time length may vary according to the subcarrier interval.

Meanwhile, NR defines a basic unit of scheduling as a slot, and also introduces a mini slot (or subslot or non-slot based schedule) to reduce transmission delay of a radio section. The use of a wide subcarrier spacing shortens the length of one slot in inverse proportion, thereby reducing the transmission delay in the radio section. The mini slot (or sub slot) is for efficient support for the URLLC scenario and can be scheduled in units of 2, 4, and 7 symbols.

In addition, unlike LTE, NR defines uplink and downlink resource allocation at a symbol level in one slot. In order to reduce the HARQ delay, a slot structure capable of transmitting HARQ ACK / NACK directly within a transmission slot has been defined, and this slot structure will be described as a self-contained structure.

NR is designed to support a total of 256 slot formats, of which 62 slot formats are used in the Rel-15. In addition, a combination of various slots supports a common frame structure constituting an FDD or TDD frame. For example, a slot structure in which all symbols of a slot are set to downlink, a slot structure in which all symbols are set to uplink, and a slot structure in which downlink symbol and uplink symbol are combined are supported. NR also supports that data transmission is distributed and scheduled in one or more slots. Accordingly, the base station can inform the terminal whether the slot is a downlink slot, an uplink slot, or a flexible slot by using a slot format indicator (SFI). The base station may indicate the slot format by using the SFI to indicate the index of the table configured through the RRC signaling to the terminal specific, and may be indicated dynamically through the downlink control information (DCI) or statically or quasi-statically through the RRC. It may be.

With regard to physical resources in NR, antenna ports, resource grids, resource elements, resource blocks, bandwidth parts, etc. are considered Can be.

The antenna port is defined such that the channel on which the symbol is carried on the antenna port can be inferred from the channel on which another symbol on the same antenna port is carried. If the large-scale property of a channel carrying a symbol on one antenna port can be deduced from the channel carrying the symbol on another antenna port, then the two antenna ports are quasi co-located or QC / QCL. quasi co-location relationship. Here, the broad characteristics include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

3 is a diagram for describing a resource grid supported by a radio access technology to which the present embodiment can be applied.

Referring to FIG. 3, since the Resource Grid supports a plurality of numerologies in the same carrier, a resource grid may exist according to each numerology. In addition, the resource grid may exist according to the antenna port, subcarrier spacing, and transmission direction.

The resource block is composed of 12 subcarriers and is defined only in the frequency domain. In addition, a resource element is composed of one OFDM symbol and one subcarrier. Accordingly, as shown in FIG. 3, one resource block may vary in size depending on the subcarrier spacing. In addition, the NR defines "Point A" serving as a common reference point for the resource block grid, a common resource block, a virtual resource block, and the like.

FIG. 4 is a diagram for describing a bandwidth part supported by a radio access technology to which the present embodiment can be applied.

In NR, unlike LTE, where the carrier bandwidth is fixed at 20Mhz, the maximum carrier bandwidth is set from 50Mhz to 400Mhz for each subcarrier interval. Therefore, it is not assumed that all terminals use all of these carrier bandwidths. Accordingly, in the NR, as shown in FIG. 4, the bandwidth part can be designated within the carrier bandwidth and used by the terminal. In addition, the bandwidth part is associated with one neuralology and consists of a subset of consecutive common resource blocks and can be dynamically activated over time. The UE is configured with up to four bandwidth parts, respectively, uplink and downlink, and data is transmitted and received using the bandwidth part activated at a given time.

In the case of paired spectrum, uplink and downlink bandwidth parts are set independently, and in the case of unpaired spectrum, to prevent unnecessary frequency re-tunning between downlink and uplink operation. For this purpose, the bandwidth parts of the downlink and the uplink are configured in pairs so as to share the center frequency.

In NR, the UE performs a cell search and random access procedure to access and communicate with a base station.

Cell search is a procedure in which a terminal synchronizes with a cell of a corresponding base station, obtains a physical layer cell ID, and acquires system information by using a synchronization signal block (SSB) transmitted by a base station.

5 is a diagram exemplarily illustrating a synchronization signal block in a radio access technology to which the present embodiment can be applied.

Referring to FIG. 5, an SSB is composed of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), which occupy one symbol and 127 subcarriers, respectively, three OFDM symbols, and a PBCH spanning 240 subcarriers.

The terminal monitors the SSB in the time and frequency domain to receive the SSB.

SSB can be transmitted up to 64 times in 5ms. A plurality of SSBs are transmitted in different transmission beams within 5ms, and the UE performs detection assuming that SSBs are transmitted every 20ms based on a specific beam used for transmission. The number of beams available for SSB transmission within 5 ms time may increase as the frequency band increases. For example, up to 4 SSB beams can be transmitted at 3 GHz or less, and up to 8 different SSBs can be transmitted at a frequency band of 3 to 6 GHz and up to 64 different beams at a frequency band of 6 GHz or more.

Two SSBs are included in one slot, and the start symbol and the number of repetitions in the slot are determined according to the subcarrier spacing.

On the other hand, SSB is not transmitted at the center frequency of the carrier bandwidth, unlike the SS of the conventional LTE. That is, the SSB may be transmitted even where the center of the system band is not, and when supporting broadband operation, a plurality of SSBs may be transmitted in the frequency domain. Accordingly, the terminal monitors the SSB using a synchronization raster, which is a candidate frequency position for monitoring the SSB. The carrier raster and the synchronization raster, which are the center frequency position information of the channel for initial access, are newly defined in the NR, and the synchronization raster has a wider frequency interval than the carrier raster, and thus supports fast SSB search of the terminal. Can be.

The UE may acquire the MIB through the PBCH of the SSB. The Master Information Block (MIB) includes minimum information for the UE to receive the remaining system information (RMSI) that the network broadcasts. In addition, the PBCH is information about the position of the first DM-RS symbol in the time domain, information for the UE to monitor SIB1 (for example, SIB1 neuronological information, information related to SIB1 CORESET, search space information, PDCCH Related parameter information, etc.), offset information between the common resource block and the SSB (the position of the absolute SSB in the carrier is transmitted through SIB1), and the like. Here, the SIB1 neuronological information is equally applied to message 2 and message 4 of the random access procedure for accessing the base station after the terminal completes the cell search procedure.

The aforementioned RMSI means System Information Block 1 (SIB1), and SIB1 is broadcast periodically (ex, 160 ms) in a cell. SIB1 includes information necessary for the UE to perform an initial random access procedure and is periodically transmitted through the PDSCH. In order to receive the SIB1, the UE needs to receive the information of the neuterology used for the SIB1 transmission and the control resource set (CORESET) information used for the scheduling of the SIB1 through the PBCH. The UE checks scheduling information on SIB1 using SI-RNTI in CORESET and acquires SIB1 on PDSCH according to the scheduling information. The remaining SIBs other than SIB1 may be transmitted periodically or may be transmitted at the request of the terminal.

6 is a diagram for explaining a random access procedure in a radio access technology to which the present embodiment can be applied.

Referring to FIG. 6, when the cell search is completed, the terminal transmits a random access preamble for random access to the base station. The random access preamble is transmitted on the PRACH. Specifically, the random access preamble is transmitted to the base station through a PRACH composed of consecutive radio resources in a specific slot that is periodically repeated. In general, when a UE initially accesses a cell, a contention-based random access procedure is performed, and when a UE performs random access for beam failure recovery (BFR), a contention-free random access procedure is performed.

The terminal receives a random access response to the transmitted random access preamble. The random access response may include a random access preamble identifier (ID), a UL grant (uplink radio resource), a temporary C-RNTI (Temporary Cell-Radio Network Temporary Identifier), and a time alignment command (TAC). Since one random access response may include random access response information for one or more terminals, the random access preamble identifier may be included to indicate to which UE the included UL Grant, temporary C-RNTI, and TAC are valid. The random access preamble identifier may be an identifier for the random access preamble received by the base station. The TAC may be included as information for the UE to adjust uplink synchronization. The random access response may be indicated by a random access identifier on the PDCCH, that is, a Random Access-Radio Network Temporary Identifier (RA-RNTI).

Upon receiving the valid random access response, the terminal processes the information included in the random access response and performs the scheduled transmission to the base station. For example, the terminal applies a TAC and stores a temporary C-RNTI. In addition, by using the UL Grant, data or newly generated data stored in the buffer of the terminal is transmitted to the base station. In this case, information that can identify the terminal should be included.

Finally, the terminal receives a downlink message for contention resolution.

The downlink control channel in NR is transmitted in a control resource set (CORESET) having a length of 1 to 3 symbols, and transmits up / down scheduling information, slot format index (SFI), and transmit power control (TPC) information. .

As such, the NR introduces the concept of CORESET to ensure system flexibility. CORESET (Control Resource Set) means a time-frequency resource for the downlink control signal. The terminal may decode the control channel candidate using one or more search spaces in the CORESET time-frequency resource. The QCL (Quasi CoLocation) assumption for each CORESET has been set, which is used to inform the analog beam direction in addition to the delay spread, Doppler spread, Doppler shift, and average delay, which are assumed by conventional QCL.

7 is a diagram for explaining CORESET.

Referring to FIG. 7, CORESET may exist in various forms within a carrier bandwidth in one slot, and CORESET in the time domain may be configured with up to three OFDM symbols. In addition, CORESET is defined as a multiple of six resource blocks up to the carrier bandwidth in the frequency domain.

The first CORESET is indicated through the MIB as part of the initial bandwidth part configuration to receive additional configuration information and system information from the network. After establishing a connection with the base station, the terminal may receive and configure one or more CORESET information through RRC signaling.

In this specification, frequencies, frames, subframes, resources, resource blocks, regions, bands, subbands, control channels, data channels, synchronization signals, various reference signals, various signals, and various messages related to NR (New Radio). May be interpreted as meaning used in the past or present, or various meanings used in the future.

3GPP recently approved “Study on New Radio Access Technology”, a study item for research on next generation / 5G radio access technology, and based on this, the RAN WG1 has a frame structure for each new radio (NR). Discussions on frame structure, channel coding & modulation, waveforms and multiple access schemes have begun. NR is required to be designed to meet various QoS requirements required for each segmented and detailed service scenario as well as improved data rate compared to LTE.

In particular, as NR's representative service scenarios, enhancement Mobile BroadBand (eMBB), massive machine type communication (MMTC), and Ultra Reliable and Low Latency Communications (URLLC) are defined, and the requirements for each service scenario are defined. As a method to satisfy, a flexible frame structure design is required compared to LTE / LTE-Advanced.

Each service scenario is a frequency constituting an arbitrary NR system because the requirements for data rates, latency, reliability, coverage, etc. are different from each other. A radio resource unit based on different numerology (e.g., subcarrier spacing, subframe, TTI, etc.) as a method for efficiently satisfying each service scenario needs through a band. There is a need for a method of efficiently multiplexing (multiplexing).

As one method for this, TDM, FDM, or TDM / FDM based on one or a plurality of NR component carriers (s) for numerology having different subcarrier spacing values. As a method of supporting multiplexing and a scheduling unit in a time domain, a method of supporting one or more time units has been discussed. In this regard, in NR, a subframe is defined as a kind of time domain structure, and reference numerology is used to define a subframe duration. As the LTE, it was decided to define a single subframe duration consisting of 14 OFDM symbols of the same 15kHz sub-carrier spacing (SCS) -based normal CP overhead. Accordingly, in NR, the subframe has a time duration of 1 ms. However, unlike LTE, subframes of NR are absolute reference time durations, and slots and mini-slots are time units based on actual uplink / downlink data scheduling. ) Can be defined. In this case, the number of OFDM symbols and the y value of the corresponding slot are determined to have a value of y = 14 regardless of the SCS value in the case of normal CP.

Accordingly, any slot consists of 14 symbols, and according to the transmission direction of the slot, all symbols are used for DL transmission or all symbols are UL transmission (UL). It may be used for transmission or in the form of a downlink portion (DL portion) + a gap (gap) + uplink portion (UL portion).

In addition, a short slot time-domain scheduling interval for transmitting / receiving uplink / downlink data is defined based on a mini-slot consisting of fewer symbols than the slot in an arbitrary number (numerology) (or SCS). A scheduling interval may be set, or a long time-domain scheduling interval for transmitting / receiving uplink / downlink data may be configured through slot aggregation. Particularly, in case of transmission / reception of latency critical data such as URLLC, it is based on 1ms (14 symbols) defined in a numerology-based frame structure with small SCS value such as 15kHz. When scheduling is performed by slot unit, it may be difficult to satisfy the latency requirement, so for this purpose, a mini slot consisting of fewer OFDM symbols than the corresponding slot is defined and based on this, critical to the same delay rate as the corresponding URLLC. (latency critical) may be defined so that scheduling is performed for data.

Alternatively, as described above, by supporting multiplexing by using TDM and / or FDM schemes, a number of numerology having different SCS values in one NR carrier is supported for each numerology. Scheduling data according to a latency requirement based on a defined slot (or mini slot) length is also considered. For example, as shown in FIG. 8 below, when the SCS is 60 kHz, since the symbol length is reduced by about 1/4 compared to the case of the SCS 15 kHz, when one slot is formed of the same 14 OFDM symbols, The slot length is 1ms, while the 60kHz-based slot length is reduced to about 0.25ms.

As described above, in NR, a method of satisfying the requirements of URLLC and eMBB by defining different SCSs or different TTI lengths is being discussed.

On the other hand, CSI provides a channel state for the network as a channel state indicator (Channel State Indicator) instead of channel estimation through conventional cell-specific RS (CRS). It is cell specific but configured by the RRC signal of the UE. Channel State Information Reference signal (CSI-RS) was introduced in LTE Release 10. The CSI-RS estimates a demodulated RS and uses the terminal to obtain channel state information.

In the existing LTE Rel-8 / 9, the cell supported up to four CRSs. However, with the evolution to LTE-A (Rel-10), there was a need to extend CSI for cell reference signals supporting up to eight layer transmissions. Herein, the antenna ports are allocated as 15-22, as shown in FIG. 9, and resource allocation is determined by a transmission period and mapping through RRC configuration. Table 2 defines the mapping method through CSI-RS configuration in normal CP.

In NR, the X-port CSI-RS is finally defined to be allocated to N consecutive / non-consecutive OFDM symbols. Here, the X-port, which is a CSI-RS port, becomes a maximum of 32 ports, and the symbol N to which the CSI-RS is allocated has a maximum value of 4.

Basically, the CSI-RS has a total of three component resource element (RE) patterns as shown in FIG. 10. Y and Z represent the frequency axis length and the time axis length of the CSI-RS RE pattern, respectively.

-(Y, Z) ∈ {(2,1), (2,2), (4,1)

In addition, as shown in FIG. 11, a total of three CDM patterns are supported in NR.

-FD-CDM2, CDM4 (FD2, TD2), CDM8 (FD2, TD4)

Here, the spreading sequences allocated to the actual CDM patterns are shown in Tables 3 to 6 below. For a description thereof, reference may be made to the standard document TS 38.211.

In legacy LTE, higher-layer signaling may be transmitted through antenna port 6, as shown in FIG. 12 below. Through this, the terminal performs positioning. Basically, the positioning reference signal (PRS) is transmitted to a predefined area through setting of higher-layer signaling parameters.

Δ _PRS : subframe offset

T _PRS : Periodic 160, 320, 640, 1280 subframes

N _PRS : Duration (= No. of consecutive subframes) 1,2,4,6 subframes

Basically, the positioning reference signal PRS uses a pseudo random sequence, that is, a quasi-orthogonal characteristic sequence. That is, positioning reference signal (PRS) sequences that overlap in code can be separated using this orthogonal characteristic. In the frequency domain, a total of six cells, including five adjacent cells, may be orthogonally allocated in the frequency domain by using a frequency reuse factor (6) in the frequency domain as shown in FIG. 12. In this case, the frequency domain position of the PRS resource element RE basically uses a physical cell ID (PCI) as an offset value.

Lastly, since collision occurs when all transmission periods of the positioning reference signal PRS are identical in the target cells in the time domain, a muting period is set for each cell so that orthogonality between specific cells or cell groups is achieved. It is possible to adjust the positioning reference signal (PRS) transmission in the time interval.

The basic principle of positioning is the Observed time difference of arrival (OTDOA), which estimates the received signal time difference (RSDD), which is the received signal time difference. The basic principle is to estimate the location of the terminal by estimating the cross region based on a time difference from at least three cells as shown in FIG. 13 below. In the positioning reference signal (PRS), positioning reference signal (PRS) transmission information for up to 24 × 3 (3-sector) cells may be configured to the terminal through higher-layer signaling.

In addition, the terminal should report the RSTD values estimated from the cells to the base station. The table below shows values used for reporting a time difference estimated by the terminal.

By default, is defined as the reporting range (reporting range) in the range of up to -15391T _s 15391T _s, it has a resolution of _{-4096 T s RSTD ≤ 4096 ≤ T} s 1 T s away. The resolution of the remaining sections is 5 T _s .

In addition, reporting on high resolution has been included in the standard, as shown in Table 8 below. This value may be sent as RSTD previously estimated, -2260 T _s ≤ RSTD ≤ 10451 The T _s can be used for reporting RSTD_delta_0, RSTD_delta_1 and, 0000T RSTD _s ≤ 2259 ≤ T _s, T _s ≤ 10452 ≤ RSTD In the 12711 T _s interval, all values except RSTD_delta_1 may be used. For reference, 1 T _s means about 9.8 m. The method calculated based on 15 kHz, which is subcarrier spacing of LTE, is as follows.

SCS = 15 kHz, reference OFDM symbol length = 66.7 us

-Timebase 2048 sample is generated based on 2048FFT (oversampling not applied)

-Length per sample of time axis (= 1T _s ) = 66.7us / 2048samples in time * (3 * 10 ⁸ m / s) = 9.8m

There is no positioning reference signal (PRS) transmission method that can satisfy various resolution requirements for various use-cases currently considered in NR positioning. The present disclosure proposes a positioning reference signal (PRS) transmission method considering multiple numerology in 5G NR.

Hereinafter, a method of setting positioning reference signal (PRS) transmission numerology in consideration of the resolution requirements for each use case will be described with reference to related drawings.

14 is a diagram illustrating a procedure of performing positioning by a terminal according to an embodiment.

Referring to FIG. 14, the terminal may receive configuration information on subcarrier spacing of a frequency band in which a Positioning Reference Signal (PRS) is transmitted (S1400).

According to an example, in order to support different resolutions in connection with the transmission of the positioning reference signal (PRS) for positioning of the terminal, the positioning reference signal (PRS) may be set based on various numerology (numerology). have. NR offers five subcarrier spacings, 15kHz, 30kHz, 60kHz, 120kHz and 240kHz.

Generally, in NR, one subframe may be set to 1 ms and one slot may be set to 14 symbols. For example, when the subcarrier spacing is 15KHz, one subframe may consist of one slot and thus may consist of 14 symbols. If the subcarrier spacing is 30KHz, since one subframe consists of two slots, it may consist of 28 symbols.

In this case, as described above, in a subcarrier spacing (SCS) of 15 kHz, one sample may have a resolution value of about 9.8 m. The number of time samples per single OFDM symbol may be set equally for each subcarrier spacing. Accordingly, when the subcarrier spacing is 30 kHz, the time per OFDM symbol is reduced by half, so that a resolution of about 9.8 / 2 = 4.9m per single sample can be supported.

Similarly, when the subcarrier spacing is 60 kHz, the time per OFDM symbol is reduced by half again, which can support a resolution of about 9.8 / 2 ² m per single sample. Similarly, when the subcarrier spacing is 120 kHz, the time per OFDM symbol is reduced by half again, so that a resolution of about 9.8 / 2 ³ m per single sample can be supported. Similarly, when the subcarrier spacing is 240 kHz, the time per OFDM symbol is reduced by half again, which can support a resolution of about 9.8 / 2 ⁴ m per single sample. In other words, the number of resolutions provided by one time sample of one positioning reference signal (PRS) decreases as the number of numerology having a large subcarrier spacing value decreases. May increase.

According to an example, a numerology of a frequency band in which the positioning reference signal PRS is transmitted may be set based on the resolution of the positioning reference signal PRS required for each use case. According to an example, configuration information on subcarrier spacing for transmission of the positioning reference signal PRS may be received through higher layer signaling. Alternatively, according to an example, configuration information on subcarrier spacing for transmitting the positioning reference signal PRS may be received through a downlink control channel or a downlink data channel.

In NR, two subcarrier spacings are used for data or RS transmission based on a transmission frequency of 6 GHz. Two subcarrier spacing selections may be performed on the positioning reference signal PRS based on a transmission frequency of 6 GHz.

For example, when the transmission frequency is less than 6 GHz, subcarrier spacing may be set to 15 kHz or 30 kHz. In this case, the case of subcarrier spacing of 15 kHz may be selected when a relatively low resolution for the positioning reference signal PRS is required. When the subcarrier spacing is 30 kHz, it may be selected when a relatively high resolution for the positioning reference signal PRS is required.

Similarly, when the transmission frequency is 6GHz or more, subcarrier spacing may be set to 60 kHz or 120 kHz. In this case, when the subcarrier spacing is 60 kHz, it may be selected when a relatively low resolution for the positioning reference signal PRS is required. When the subcarrier spacing is 120 kHz, it may be selected when a relatively high resolution for the positioning reference signal PRS is required.

According to an example, when the terminal supports a millimeter wave (mmWave) band of 6GHz or more simultaneously with a band of 6GHz or less, the terminal may be applicable to the resolution for each use case by integrating the entire numerology. That is, when the transmission frequency is less than 6GHz, subcarrier spacing may be selected as 15kHz when the first resolution is required. If a second resolution higher than the first resolution is required, subcarrier spacing may be selected at 30 Hz. When the transmission frequency is 6 GHz or more, subcarrier spacing may be selected at 60 kHz when a third resolution is required. If a fourth resolution is required, subcarrier spacing may be selected at 120 kHz.

According to an embodiment, when transmitting the positioning reference signal (PRS), a number of numerology may be set differently for each transmission period according to each use case based on a single bandwidth part (BWP). For example, different DM settings and location reference signal (PRS) transmission may be possible based on TDM. That is, among the plurality of bandwidth parts constituting the system bandwidth, in the same bandwidth part, a location reference signal (PRS) transmission interval having different resolutions may be set in time intervals. In this case, numerology information and time interval information may be added to the positioning reference signal PRS configuration information.

Through this, even in a single bandwidth part (BWP), positioning reference signal PRS signals having different resolutions may be transmitted in different time intervals. In this case, different resolution adjustments may be made through numerology as described above under the assumption that the positioning reference signal (PRS) pattern is the same.

According to another embodiment, when the positioning reference signal (PRS) is transmitted based on the multiple bandwidth part (multiple BWP), different numerology may be set for each bandwidth part (BWP) according to the use case. have. A different numerology based on multiple BWP simultaneous transmissions may be set, and thus a positioning reference signal PRS may be transmitted.

According to an example, a positioning reference signal (PRS) signal may be transmitted simultaneously in the full bandwidth part BWP. For example, in the first bandwidth part, the subcarrier spacing may be set to 120 kHz so that the positioning reference signal PRS may be transmitted. Also, in the second bandwidth part, the subcarrier spacing is set to 15 kHz so that the positioning reference signal PRS may be transmitted. Similarly, in the third bandwidth part, the subcarrier spacing is set to 30 kHz, and in the fourth bandwidth part, the subcarrier spacing is set to 60 kHz so that the positioning reference signal PRS can be transmitted.

That is, the base station may set and transmit a positioning reference signal (PRS) based on different numerology (numerology) for each bandwidth part (BWP). Through this, positioning reference signals PRS that satisfy various resolution requirements may be simultaneously transmitted.

 In this case, since only the configuration information may be received through the bandwidth part BWP for the positioning reference signal PRS, higher layer configuration information for transmitting the positioning reference signal PRS may not be needed. However, even in this case, a bandwidth part index (BWP index), a numerology value, and the like may be included in addition to the existing positioning reference signal PRS configuration information.

However, this is merely an example and the present invention is not limited thereto. According to an example, the base station may have different numerical mechanisms for the bandwidth part (BWP) of some of the plurality of bandwidth parts (BWP) constituting the system bandwidth according to the use case and the capability of the terminal. Based on the positioning reference signal (PRS) can be set and transmitted.

According to an example, the base station may transmit a positioning reference signal (PRS) based on a number of numerology that satisfies various resolution requirements in consideration of the capability of each terminal. The base station may perform simultaneous transmission by repeatedly repeating the positioning reference signal PRS having the same resolution requirement to the various bandwidth parts BWP.

Referring back to FIG. 14, the terminal may receive the positioning reference signal based on the configuration information on the subcarrier spacing (S1410).

The terminal may receive the positioning reference signal based on the configuration information on the subcarrier spacing received from the base station. According to an example, the terminal may further receive configuration information on the transmission bandwidth for the positioning reference signal from the base station and receive the positioning reference signal. For example, it is assumed that each UE performs PDSCH reception through an arbitrary activated bandwidth part (BWP). In this case, each terminal may receive the positioning reference signal by activating a specific bandwidth part (BWP) in which the positioning reference signal is transmitted for positioning of the terminal.

According to an example, when the bandwidth part (BWP) is set to multiple, each terminal to receive a location reference signal by activating a plurality of specific bandwidth part (BWP) is set to transmit a location reference signal for positioning of the terminal Can be. In this case, the terminal may receive the positioning reference signal from a radio resource allocated to the transmission of the positioning reference signal based on the configuration information on the transmission pattern of the positioning reference signal within a specific bandwidth.

The NR terminal may detect the positioning reference signal PRS based on the capability of the terminal. According to an example, a positioning reference signal (PRS) signal may be detected based on the capability of the terminal. Whether the terminal receives a multi-bandwidth part (BWP) to receive the positioning reference signal (PRS), the positioning reference signal processing time (PRS processing time) and reporting capability of the terminal (capability) ) Can be considered.

According to an example, it is assumed that the terminal may support a reception function of a multi-bandwidth part (BWP) as well as a reception of a single bandwidth part (BWP). In addition, it is assumed that terminals supporting only the terminal bandwidth part (BWP) and terminals supporting up to the multi-bandwidth part (BWP) may be mixed according to the capability of the terminal.

Single Bandwidth Part (BWP) Receiving A capability supporting terminal may select and receive only a bandwidth part (BWP) suitable for a use case of the terminal itself from positioning reference signal (PRS) configuration information. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

In the case of a terminal supporting a multi-bandwidth part (BWP) reception capability, according to an example, the positioning reference signal is selected by selecting only a bandwidth part (BWP) that fits the use case of the terminal itself from the positioning reference signal (PRS) configuration information. (PRS) can be received. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

Alternatively, according to another example, the terminal may receive the positioning reference signal PRS in all bandwidth parts BWP supported by the positioning reference signal PRS configuration information. That is, the terminal may detect the bandwidth part BWP through which all positioning reference signals PRS are transmitted regardless of the use case of the terminal itself. If the same NMR-based positioning reference signal (PRS) is repeatedly transmitted to the multi-bandwidth part (BWP), the terminal receives the positioning reference signal (PRS) through the multi-bandwidth part (BWP) The detection accuracy can be increased.

According to an example, in order to measure the location of the terminal, the terminal may receive a positioning reference signal from a serving cell and at least two adjacent cells, respectively. The terminal may measure reference signal time difference information between the received positioning reference signals. The terminal may transmit the RSTD information for the positioning reference signal to the base station. The base station may estimate the cross region based on the RSTD information. Accordingly, the position of the terminal can be estimated.

According to this, in performing positioning in a next-generation wireless network, a flexible configuration for each time interval or bandwidth part is required for a numerology of radio resources used for transmission of positioning reference signals. It is possible to provide a reporting resolution for a suitable location reference signal for various usage scenarios. In addition, in performing positioning in a next-generation wireless network, a reporting resolution suitable for a situation of a terminal may be configured by differently configuring a numerology for a radio resource used for transmitting a positioning reference signal based on the capability of the terminal. (reporting resolution) can be provided. Through this, direct positioning reference signal (PRS) transmission control in consideration of the resolution of the positioning reference signal (PRS) may be possible.

15 is a diagram illustrating a procedure of performing positioning by a base station according to an embodiment.

Referring to FIG. 15, the base station may configure configuration information on subcarrier spacing of a frequency band in which a Positioning Reference Signal (PRS) is transmitted (S1500).

According to an example, in order to support different resolutions in connection with the transmission of the positioning reference signal (PRS) for positioning of the terminal, the base station sets the positioning reference signal (PRS) based on various numerology (numerology) Can be. NR offers five subcarrier spacings, 15kHz, 30kHz, 60kHz, 120kHz and 240kHz.

Generally, in NR, one subframe may be set to 1 ms and one slot may be set to 14 symbols. For example, when the subcarrier spacing is 15KHz, one subframe may consist of one slot and thus may consist of 14 symbols. If the subcarrier spacing is 30KHz, since one subframe consists of two slots, it may consist of 28 symbols.

In this case, as described above, in a subcarrier spacing (SCS) of 15 kHz, one sample may have a resolution value of about 9.8 m. The number of time samples per single OFDM symbol may be set equally for each subcarrier spacing. Accordingly, when the subcarrier spacing is 30 kHz, the time per OFDM symbol is reduced by half, so that a resolution of about 9.8 / 2 = 4.9m per single sample can be supported.

Similarly, a subcarrier spacing of 60 kHz can support a resolution of about 9.8 / 2 ² m per single sample, and a subcarrier spacing of 120 kHz can support a resolution of about 9.8 / 2 ³ m per single sample. . In other words, the number of resolutions provided by one time sample of one positioning reference signal (PRS) decreases as the number of numerology having a large subcarrier spacing value decreases. May increase.

According to an example, the base station may set the numerology of the frequency band in which the positioning reference signal PRS is transmitted based on the resolution of the positioning reference signal PRS required for each use case. According to an example, the base station may transmit configuration information on subcarrier spacing for transmission of the positioning reference signal (PRS) through higher layer signaling. Alternatively, according to an example, the base station may transmit configuration information on subcarrier spacing for transmission of the positioning reference signal (PRS) through a downlink control channel or a downlink data channel.

In NR, two subcarrier spacings are used for data or RS transmission based on a transmission frequency of 6 GHz. Two subcarrier spacing selections may be performed on the positioning reference signal PRS based on a transmission frequency of 6 GHz.

For example, when the transmission frequency is less than 6GHz, the base station may set the subcarrier spacing to 15kHz or 30kHz. In this case, the case of subcarrier spacing of 15 kHz may be selected when a relatively low resolution for the positioning reference signal PRS is required. When the subcarrier spacing is 30 kHz, it may be selected when a relatively high resolution for the positioning reference signal PRS is required.

Similarly, when the transmission frequency is 6GHz or more, the base station can set the subcarrier spacing to 60kHz or 120kHz. In this case, when the subcarrier spacing is 60 kHz, it may be selected when a relatively low resolution for the positioning reference signal PRS is required. When the subcarrier spacing is 120 kHz, it may be selected when a relatively high resolution for the positioning reference signal PRS is required.

According to an example, when the terminal simultaneously supports a millimeter wave (mmWave) band of 6GHz or more along with a band of 6GHz or less, the base station integrates the entire numerology for the terminal and applies an appropriate resolution for each use case. can do. That is, when the transmission frequency is less than 6GHz, the base station may select the subcarrier spacing (15kHz) when the first resolution is required. The base station may select subcarrier spacing as 30 Hz when a second resolution higher than the first resolution is required. If the transmission frequency is 6GHz or more, the base station may select subcarrier spacing as 60 kHz when a third resolution is required. The base station may select subcarrier spacing to 120 kHz when the fourth resolution is required.

According to an embodiment, when the base station transmits a positioning reference signal (PRS), the base station may set a different number of numerology for each transmission period according to each use case based on a single bandwidth part (BWP). For example, the base station may perform different DM setting and transmission of positioning reference signal (PRS) based on TDM. That is, among the plurality of bandwidth parts constituting the system bandwidth, in the same bandwidth part, a location reference signal (PRS) transmission interval having different resolutions may be set in time intervals. In this case, numerology information and time interval information may be added to the positioning reference signal PRS configuration information.

Through this, the base station may transmit positioning reference signal (PRS) signals having different resolutions even in a single bandwidth part (BWP) in different time intervals. In this case, different resolution adjustments may be made through numerology as described above under the assumption that the positioning reference signal (PRS) pattern is the same.

According to another embodiment, when the positioning reference signal (PRS) is transmitted on the basis of multiple bandwidth parts (multiple BWP), the base station to set different numerology (numerology) for each bandwidth part (BWP) according to the use case Can be. A different numerology based on multiple BWP simultaneous transmissions may be set, and thus a positioning reference signal PRS may be transmitted.

According to an example, the base station may transmit a positioning reference signal (PRS) signal simultaneously in the full bandwidth part (BWP). For example, in the first bandwidth part, the subcarrier spacing may be set to 120 kHz so that the positioning reference signal PRS may be transmitted. Also, in the second bandwidth part, the subcarrier spacing is set to 15 kHz so that the positioning reference signal PRS may be transmitted. Similarly, in the third bandwidth part, the subcarrier spacing is set to 30 kHz, and in the fourth bandwidth part, the subcarrier spacing is set to 60 kHz so that the positioning reference signal PRS can be transmitted.

That is, the base station may set and transmit a positioning reference signal (PRS) based on different numerology (numerology) for each bandwidth part (BWP). Through this, positioning reference signals PRS that satisfy various resolution requirements may be simultaneously transmitted.

 In this case, since only the configuration information may be received through the bandwidth part BWP for the positioning reference signal PRS, higher layer configuration information for transmitting the positioning reference signal PRS may not be needed. However, even in this case, a bandwidth part index (BWP index), a numerology value, and the like may be included in addition to the existing positioning reference signal PRS configuration information.

However, this is merely an example and the present invention is not limited thereto. According to an example, the base station may have different numerical mechanisms for the bandwidth part (BWP) of some of the plurality of bandwidth parts (BWP) constituting the system bandwidth according to the use case and the capability of the terminal. Based on the positioning reference signal (PRS) can be set and transmitted.

According to an example, the base station may transmit a positioning reference signal (PRS) based on a number of numerology that satisfies various resolution requirements in consideration of the capability of each terminal. The base station may perform simultaneous transmission by repeatedly repeating the positioning reference signal PRS having the same resolution requirement to the various bandwidth parts BWP.

Referring back to FIG. 15, the base station may transmit the positioning reference signal based on the configuration information on the subcarrier spacing (S1510).

The base station may transmit the positioning reference signal to the terminal based on the configuration information on the subcarrier spacing. According to an example, the base station may further transmit configuration information on the transmission bandwidth of the positioning reference signal to the terminal and transmit the positioning reference signal based on the corresponding configuration information. For example, it is assumed that each UE performs PDSCH reception through an arbitrary activated bandwidth part (BWP). In this case, each terminal may receive the positioning reference signal by activating a specific bandwidth part (BWP) in which the positioning reference signal is transmitted for positioning of the terminal.

According to an example, when the bandwidth part (BWP) is set to multiple, each terminal to receive a location reference signal by activating a plurality of specific bandwidth part (BWP) is set to transmit a location reference signal for positioning of the terminal Can be. In this case, the terminal may receive the positioning reference signal from a radio resource allocated to the transmission of the positioning reference signal based on the configuration information on the transmission pattern of the positioning reference signal within a specific bandwidth.

The NR terminal may detect the positioning reference signal PRS based on the capability of the terminal. According to an example, a positioning reference signal (PRS) signal may be detected based on the capability of the terminal. Whether the terminal receives a multi-bandwidth part (BWP) to receive the positioning reference signal (PRS), the positioning reference signal processing time (PRS processing time) and reporting capability of the terminal (capability) ) Can be considered.

According to an example, it is assumed that the terminal may support a reception function of a multi-bandwidth part (BWP) as well as a reception of a single bandwidth part (BWP). In addition, it is assumed that terminals supporting only the terminal bandwidth part (BWP) and terminals supporting up to the multi-bandwidth part (BWP) may be mixed according to the capability of the terminal.

Single Bandwidth Part (BWP) Receiving A capability supporting terminal may select and receive only a bandwidth part (BWP) suitable for a use case of the terminal itself from positioning reference signal (PRS) configuration information. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

In the case of a terminal supporting a multi-bandwidth part (BWP) reception capability, according to an example, the positioning reference signal is selected by selecting only a bandwidth part (BWP) that fits the use case of the terminal itself from the positioning reference signal (PRS) configuration information. (PRS) can be received. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

Alternatively, according to another example, the terminal may receive the positioning reference signal PRS in all bandwidth parts BWP supported by the positioning reference signal PRS configuration information. That is, the terminal may detect the bandwidth part BWP through which all positioning reference signals PRS are transmitted regardless of the use case of the terminal itself. If the same NMR-based positioning reference signal (PRS) is repeatedly transmitted to the multi-bandwidth part (BWP), the terminal receives the positioning reference signal (PRS) through the multi-bandwidth part (BWP) The detection accuracy can be increased.

According to an example, in order to measure the location of the terminal, the terminal may receive a positioning reference signal from a serving cell and at least two adjacent cells, respectively. The terminal may measure reference signal time difference information between the received positioning reference signals. The terminal may transmit the RSTD information for the positioning reference signal to the base station. The base station may estimate the cross region based on the RSTD information. Accordingly, the position of the terminal can be estimated.

According to this, in performing positioning in a next-generation wireless network, a flexible configuration for each time interval or bandwidth part is required for a numerology of radio resources used for transmission of positioning reference signals. It is possible to provide a reporting resolution for a suitable location reference signal for various usage scenarios. In addition, in performing positioning in a next-generation wireless network, a reporting resolution suitable for a situation of a terminal may be configured by differently configuring a numerology for a radio resource used for transmitting a positioning reference signal based on the capability of the terminal. (reporting resolution) can be provided. Through this, direct positioning reference signal (PRS) transmission control in consideration of the resolution of the positioning reference signal (PRS) may be possible.

Hereinafter, referring to the related drawings, the transmission numerology of the positioning reference signal (PRS) is set in consideration of the resolution requirements for each multi-numerology and use-case in NR. Each embodiment will be described in detail.

With regard to NR positioning, the proposed use cases are primarily referred to the Positioning use case and accuracy of TR 22.862. This is summarized in Table 9 below.

Simplifying the NR requirements shows that they must provide higher resolution than LTE and support a variety of use cases. In addition, a bandwidth part (BWP) newly introduced to NR should be additionally considered. In NR, the total transmission bandwidth of a single carrier may be divided into up to four BWPs, and the indication of the BWP is performed dynamically through DCI (up to 2 bit field).

Hereinafter, in addition to the use cases of the various positioning reference signals (PRS) and the bandwidth part (BWP) operating method described above, numerology and capability of the terminal are further considered. Based on this, a specific embodiment of a method for supporting resolution based on numerology and a method of operating a positioning reference signal (PRS) in consideration of the capability of the terminal will be described.

In order to apply the method for supporting a resolution based on numerology and a method of operating a positioning reference signal (PRS) in consideration of the capability of the terminal, the transmission pattern of the positioning reference signal (PRS) is applied. The setting will be described first.

According to an example, the mapping for the pattern of the positioning reference signal PRS in the time-frequency domain is set to the positioning reference signal PRS signal itself mapping, or the positioning reference signal PRS upper layer signaling and channel It may be set to the state information reference signal (CSI-RS) resource mapping.

In the case of the positioning reference signal (PRS) signal self mapping, the positioning reference signal (PRS) signal itself may be newly added to the physical signal in the same manner as before. That is, in time-frequency mapping of the positioning reference signal PRS, a frequency domain shift pattern may be implicitly defined based on cell ID information. According to the mapping of the cell ID-based positioning reference signal (PRS) pattern, the UE correctly recognizes the positioning reference signal (PRS) pattern of neighboring cells, so that it is possible to detect the positioning reference signal (PRS) for each cell and to perform interference control for each cell. It may be easy.

In the case of channel state information reference signal (CSI-RS) resource mapping, the positioning reference signal (PRS) exists only in a higher layer signaling configuration, and the actual positioning reference signal (PRS) signal is a CSI-RS resource. It is transmitted as a physical signal through. In this case, according to an example, the NR CSI-RS may be utilized, which may be the most flexible mapping of the NR CSI-RS, thereby generating a desired positioning reference signal (PRS) pattern. Because. However, since the CSI-RS configuration information is UE-specific in nature, the CSI-RS configuration information may be different for each stage and each cell. Therefore, in order for the UE to know the positioning reference signal (PRS) patterns of all the cells, a basic CSI-RS mapping pattern may be defined, and a shift pattern for each cell may be performed by adding separate signaling.

A shift pattern of CSI-RS for each cell may be set based on a cell ID, or a shift pattern for each cell may be directly defined.

In addition, in the case of the above-described positioning reference signal (PRS) signal self mapping and channel state information reference signal (CSI-RS) resource mapping, a PRS pattern shift field may be added. For example, if it is set to a field of 1 bit on / off, if the PRS-pattern-shift is 'on', the cell ID information is used, and if it is 'off', the value set directly is used. Can be.

A method of mapping the positioning reference signal (PRS) signal itself according to an example will be described below. In order to support various use cases required in the NR, a positioning reference signal (PRS) supporting a flexible pattern may be introduced.

As an example for this, the base station may configure a suitable positioning reference signal pattern through higher-layer signaling according to a use case of the terminal. This may mean that the network directly selects various location reference signal patterns and instructs the terminal.

According to an example, the information related to the configuration of the positioning reference signal provided to the terminal includes the transmission bandwidth of the positioning reference signal, a configuration index of the positioning reference signal (PRS configuration index), the number of consecutive positioning reference signal subframes, positioning Information, such as a PRS muting pattern, may be included. The configuration index of the location reference signal may provide transmission period and subframe offset information of the location reference signal as shown in Table 10 below.

Unlike the conventional case in which only a single single pattern is used in all cells as a basic pattern of the positioning reference signal, various pattern information of the positioning reference signal dependent on various use cases needs to be newly added in NR. There is. For example, the following information may be added directly to the pattern information of the positioning reference signal, or may be included in the form of a positioning reference signal pattern configuration index.

Positioning reference signal pattern index (PRS pattern index): may indicate information defining a pattern of the positioning reference signal pattern. For example, a pattern in which a subcarrier index of the positioning reference signal RE increases / fixed pattern may be defined according to an OFDM symbol. However, the present invention is not limited thereto, and various irregular patterns may be defined.

Positioning Reference Signal Density (PRS density in frequency domain): As the LTE positioning reference signal is shown in FIG. 12, unlike the positioning reference signal density ρ is set to 2 REs / symbol / PRB, The positioning reference signal density according to the present disclosure may be defined as various values such as 1/2/3/4 /.../ 12, including ρ = 2.

PRS location in time domain: A conventional LTE location reference signal is different from the OFDM symbol location where a reference signal is transmitted in an LTE normal CP case, as shown in FIG. The transmission position of the positioning reference signal according to the present disclosure may be freely determined by the base station. For example, up to 14 OFDM symbols may be selected in the NR 14-symbol slot to transmit a positioning reference signal. Therefore, the corresponding field may be defined as, for example, PRS location in time domain or PRS_mapping_time information, and 14 bit information such as [ l ₀ , l ₁ , l ₂ , l ₃ , ... l ₁₃ ]. Can be expressed. For example, if this information is set to [00111111111111], a positioning reference signal may be transmitted in OFDM symbols in all NR slots except for the previous two OFDM symbols. This information means that a new transmission of N bits, the 14-bit definition described above is an example.

Positioning reference signal starting position in frequency domain (PRS starting point in frequency domain): In the present disclosure, it may mean a starting position of the positioning reference signal RE. In the LTE positioning reference signal, the frequency domain start position of the positioning reference signal RE is implicitly determined by a PCID (Physical Cell ID). Therefore, the terminal has a procedure for automatically recognizing the positioning reference signal pattern when learning its own serving cell PCID. However, in the NR positioning reference signal, such a frequency domain start position or frequency domain offset may be directly indicated in order to support a more flexible positioning reference signal structure. The value of this information may be determined by having an NR PCID or by restricting it to a specific range. For example, in NR, the PCIDs range from 0,1,2, ..., 1007 (1008). Therefore, the PCID may be arbitrarily referred to in the corresponding range and transmitted to the terminal, or the range may be determined in consideration of the maximum neighbor cell list range. For example, in LTE, a neighbor cell list is transmitted to UE through positioning reference signal configuration information for up to 24 cells. Alternatively, the positioning reference signal start position may be determined based on a frequency reuse factor. For example, if the number of positioning reference signals RE per OFDM symbol is two, the frequency reuse coefficient is six. That is, since up to six orthogonal allocation patterns are generated, frequency domain offset information may be transmitted through less information of six bits.

Positioning Reference Signal Start Position in Time Domain: Refers to information indicating a starting OFDM symbol position at which the positioning reference signal is transmitted. If there is no PRS location in time domain information, the start location information in the time domain may be additionally required. The range of the corresponding information may be determined from a value of (0, 1, 13) on the basis of 14 OFDM slots.

 According to an example, the positioning reference signal (PRS) setting pattern defined by using the above-described NR positioning reference signal setting information may be set to a ramping pattern (SC index increase) as the OFDM symbol index increases. have. For example, FIG. 16 and FIG. 17 show a ramping pattern when the positioning reference signal density ρ is 2 REs / symbol / PRS.

Alternatively, according to an example, the positioning reference signal (PRS) setting pattern may be set to a fixed pattern regardless of the OFDM symbol index. For example, FIG. 18 and FIG. 19 show a fixed pattern when the positioning reference signal density ρ is 2 REs / symbol / PRS.

A channel state information reference signal (CSI-RS) resource mapping method according to another example will be described below. Multiple CSI-RS resource configuration may be used for pattern configuration of the flexible location reference signal.

In this case, the positioning reference signal pattern configuration is transmitted to the terminal through higher layer signaling, but the actual positioning reference signal may be transmitted using the CSI-RS resources. By default, the NR CSI-RS defines a 1-symbol CSI-RS pattern, as shown in the top two cases not shaded in Table 11, where the CSI-RS RE density (ρ) can also have a value of 1 or more. It provides a category.

According to an example, a plurality of NR CSI-RS resources may be configured and configured for positioning reference signal transmission purposes. In LTE, unlike LTE, there is no cell-specific reference signal (RS). That is, all RSs have UE-specific characteristics. Since CSI-RS of the RS has a flexible configuration, according to an example, the corresponding CSI-RS location table is shaded in Table 11 to provide various densities of positioning reference signals. Cases may be added. A case in which the CSI-RS RE density ρ shaded in Table 11 is 2, 4, 6, or 12 may be added as a new CSI-RS pattern. This new CSI-RS pattern may include only a portion of the table in which another category is added or presented as needed.

That is, according to the present disclosure, an intended positioning reference signal pattern may be defined by allocating N numbers of various single symbol CSI-RS pattern-based CSI-RS resources.

According to an example, CSI-RS pattern configuration information may be directly set for CSI-RS resources. That is, mapping positions may be set for the frequency domain and the time domain. Location allocation information may be provided in a higher-layer parameter CSI-RS-ResourceMapping of RRC signaling for actual NR CSI-RS configuration. The intended positioning reference signal pattern may be defined including N CSI-RS resources having such flexible CSI-RS allocation characteristics.

For example, when the positioning reference signal in the slot is set, all N start positions of a single symbol CSI-RS resource may be set to be the same. In this case, it is assumed that one CSI-RS resource set is defined in an NR slot and is composed of a total of 12 CSI-RS resources. According to an example, the RE mapping of all the CSI-RS resources in the slot may be set identically.

As another example, when the positioning reference signal in the slot is set, N start positions of a single symbol CSI-RS resource may be partially identical or different from each other. In this case, it is assumed that one CSI-RS resource set is defined in an NR slot and is composed of a total of 12 CSI-RS resources. According to an example, RE mapping of all CSI-RS resources in the slot may be set differently (ramping case).

As a first embodiment according to the present disclosure, the positioning reference signal PRS may be transmitted based on numerology so as to support different resolutions.

According to an embodiment of the present disclosure, in order to support different resolutions in connection with the transmission of the positioning reference signal (PRS) for positioning of the terminal, the positioning reference signal (PRS) is based on various numerology (numerology) Can be sent to. As described above, in 15 kHz subcarrier spacing (SCS), one sample may have a resolution value of about 9.8 m. NR provides a total of five subcarrier spacings. In this case, the resolution per single sample that can be provided for each numerology is shown in Table 12.

As shown in Table 12, the number of resolutions provided by a time sample of a positioning reference signal (PRS) is smaller in a number of numerology having a large subcarrier spacing value. As a result, the resolution of positioning can be increased. For example, FIGS. 16 and 17 illustrate examples of transmission patterns of positioning reference signals PRS when subcarrier spacing is 15 kH and 30 kHz, respectively.

Generally, in NR, one subframe may be set to 1 ms and one slot may be set to 14 symbols. When the subcarrier spacing is 15 KHz, one subframe consists of one slot and thus may consist of 14 symbols. When the subcarrier spacing is 30 KHz, one subframe consists of two slots, and thus may consist of 28 symbols.

Therefore, as shown in FIGS. 16 and 17, when the subcarrier spacing is 15 kHz and the case of 30 kHz, when the subcarrier spacing is 30 kHz in the same time interval, the numerology (numerology) has a shorter period. It can be seen that it is transmitted. In other words, the time per OFDM symbol is reduced by half. Also, the number of time samples per single OFDM symbol is set equal. Therefore, when the subcarrier spacing is 30 kHz, which supports a resolution of 9.8 m per single sample, the resolution of about 9.8 / 2 = 4.9 m per single sample can be supported when the subcarrier spacing is 30 kHz.

The base station determines the numerology of the bandwidth part (BWP) through which the positioning reference signal (PRS) is transmitted, based on the resolution of the positioning reference signal (PRS) required for each use case. ) Value can be set.

In NR, two subcarrier spacings are used for data or RS transmission based on a transmission frequency of 6 GHz. The setting value for this can be known by the UE receiving a 1-bit field of the PBCH. Therefore, based on a transmission frequency of 6 GHz, two subcarrier spacing selections may be performed on the positioning reference signal PRS as follows.

Case 1: fc <6 GHz

   SCS-1: 15 kHz

   SCS-2: 30 kHz

Case 2: fc> = 6 GHz

   SCS-1: 60 kHz

   SCS-2: 120 kHz

Accordingly, the resolution of the positioning reference signal PRS may also be divided into the following use cases based on each center frequency.

Case 1: fc <6 GHz

   SCS-1: 15kHz => Low resolution

   SCS-2: 30kHz => High resolution

Case 2: fc> = 6 GHz

   SCS-1: 60kHz => Low resolution

   SCS-2: 120kHz => High resolution

According to an example, if the terminal can simultaneously use a millimeter wave (mmWave) band of 6GHz or more with a band of 6GHz or less, it may be possible to apply the resolution for each use case by integrating the entire numerology as shown below.

Case 1: fc <6 GHz

SCS-1: 15kHz => 1 ^st -step resolution

SCS-2: 30kHz => 2 ^nd -step resolution

Case 2: fc> = 6 GHz

SCS-1: 60 kHz => 3 ^rd -step resolution

SCS-2: 120kHz => 4 ^th -step resolution

According to an embodiment, when transmitting a positioning reference signal (PRS), the base station may divide transmission intervals for each use case based on a single bandwidth part (BWP), and may differently set the numerology for each transmission interval. . Hereinafter, a method of setting the positioning reference signal PRS in consideration of each bandwidth part BWP will be described.

According to an example, in the configuration of the positioning reference signal (PRS) in NR, the existing LTE positioning reference signal (PRS) configuration information is reused as it is, indicating a bandwidth part (BWP) in which the positioning reference signal (PRS) is transmitted. It may include BWP index information. In this case, although data transmission is still possible in another bandwidth part (BWP), the positioning reference signal (PRS) may be transmitted only in the multi-cell PRS-BWP configured for positioning reference signal (PRS) transmission.

Referring to FIG. 20, an example of TDM-based different numerology setting and positioning reference signal (PRS) transmission is shown. Referring to FIG. 20, in the same bandwidth part (BWP # 1), positioning reference signal (PRS) transmission intervals having different resolutions may be set in time intervals (time intervals # 0 to # 3). That is, since only a single BWP can be received from the NR Rel-15 terminal, it is necessary to support the transmission of the positioning reference signal (PRS) of the TDM scheme.

In this case, as described above, numerology information and time interval information should be added to the positioning reference signal PRS configuration information. FIG. 21 shows an example of configuration information PRS_info of a positioning reference signal including bandwidth part index information and neuralology information. The configuration information PRS_info of the positioning reference signal may provide information related to the configuration of the positioning reference signal.

According to an example, when it is necessary to set the value of the numerology (numerology) for the multiple time intervals, a plurality of setting values for the transmission interval for each prs-Numerology may be included. Through this, even in a single bandwidth part (BWP), positioning reference signal PRS signals having different resolutions may be transmitted in different time intervals. In this case, different resolution adjustments may be made through numerology as described above under the assumption that the positioning reference signal (PRS) pattern is the same.

According to another embodiment, when the positioning reference signal (PRS) is transmitted based on the multiple bandwidth part (multiple BWP), different numerology may be set for each bandwidth part (BWP) according to the use case. have. Referring to FIG. 22, there is shown an example of different numerology setting and positioning reference signal (PRS) transmission based on multiple BWP simultaneous transmission.

According to an example, as shown in FIG. 22, it is assumed that a positioning reference signal (PRS) signal is simultaneously transmitted in the entire bandwidth part BWP. Referring to FIG. 22, in the bandwidth part BWP # 0, the subcarrier spacing is set to 120 kHz so that the positioning reference signal PRS may be transmitted. Similarly, in the bandwidth part BWP # 1, the subcarrier spacing is set to 15 kHz so that the positioning reference signal PRS can be transmitted. Similarly, in the bandwidth part BWP # 2, the subcarrier spacing is set to 30 kHz so that the positioning reference signal PRS can be transmitted. Similarly, in the bandwidth part BWP # 3, the subcarrier spacing is set to 60 kHz so that the positioning reference signal PRS can be transmitted. That is, the base station may set and transmit a positioning reference signal (PRS) based on different numerology (numerology) for each bandwidth part (BWP). Through this, positioning reference signals PRS that satisfy various resolution requirements may be simultaneously transmitted.

In this case, since only the configuration information may be received through the bandwidth part BWP for the positioning reference signal PRS, higher layer configuration information for transmitting the positioning reference signal PRS may not be needed. However, as in the above-described embodiment, a bandwidth part index (BWP index), a numerology value, and the like may be included in addition to the existing positioning reference signal PRS configuration information.

According to an example, the base station may transmit a positioning reference signal (PRS) based on a number of numerology that satisfies various resolution requirements in consideration of the capability of each terminal. The base station may perform simultaneous transmission by repeatedly repeating the positioning reference signal PRS having the same resolution requirement to the various bandwidth parts BWP.

As a second embodiment according to the present disclosure, the NR terminal may detect a positioning reference signal PRS based on the capability of the terminal. According to an example, it is assumed an operation of detecting a positioning reference signal (PRS) signal based on the capability (capability) of the terminal. Capability of the terminal that can be considered for receiving the positioning reference signal (PRS), whether the terminal receives a multi-bandwidth part (BWP), positioning reference signal processing time (PRS processing time) and reporting capperville of the terminal Reporting capability, and the like.

In addition, according to an example, the number of positioning reference signal ports (number of PRS ports) may be further considered as the capability (capability) of the terminal. In general, however, the positioning reference signal may be transmitted using a single port.

According to an example, it is assumed that the terminal may support a reception function of a multi-bandwidth part (BWP) as well as a reception of a single bandwidth part (BWP). In addition, it is assumed that terminals supporting only the terminal bandwidth part (BWP) and terminals supporting up to the multi-bandwidth part (BWP) may be mixed according to the capability of the terminal.

According to an example, as a first case, in the case of a single bandwidth part (BWP) reception capability supporting terminal, only the bandwidth part (BWP) that matches the use case of the terminal itself among the positioning reference signal (PRS) configuration information You can choose to receive it. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

For example, when the terminal is capable of supporting only a single bandwidth part (BWP), the terminal receives a positioning reference signal (PRS) signal using the bandwidth part (BWP # 1) among the bandwidth parts shown in FIG. 22. Can be received.

As a second case, in the case of a terminal supporting a multi-bandwidth part (BWP) reception capability, according to an example, only the bandwidth part (BWP) that matches the use case of the terminal itself among the positioning reference signal (PRS) configuration information may be used. The positioning reference signal PRS may be received. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

For example, if the current use case of the terminal requires a high resolution at a transmission frequency of 6 GHz or more, the terminal uses the bandwidth part BWP # 0 among the bandwidth parts shown in FIG. ) Signal can be received.

Alternatively, according to another example of the second case, the terminal may receive the positioning reference signal (PRS) in all bandwidth parts (BWP) supported by the positioning reference signal (PRS) configuration information. For example, the terminal may receive a positioning reference signal (PRS) signal for all four bandwidth parts shown in FIG. 22.

That is, the terminal may detect the bandwidth part BWP through which all positioning reference signals PRS are transmitted regardless of the use case of the terminal itself. If the same NMR-based positioning reference signal (PRS) is repeatedly transmitted to the multi-bandwidth part (BWP), the terminal receives the positioning reference signal (PRS) through the multi-bandwidth part (BWP) The detection accuracy can be increased.

According to this, in performing positioning in a next-generation wireless network, a flexible configuration for each time interval or bandwidth part is required for a numerology of radio resources used for transmission of positioning reference signals. It is possible to provide a reporting resolution for a suitable location reference signal for various usage scenarios. In addition, in performing positioning in a next-generation wireless network, a reporting resolution suitable for a situation of a terminal may be configured by differently configuring a numerology for a radio resource used for transmitting a positioning reference signal based on the capability of the terminal. (reporting resolution) can be provided. Through this, direct positioning reference signal (PRS) transmission control in consideration of the resolution of the positioning reference signal (PRS) may be possible.

Hereinafter, configurations of a terminal and a base station capable of performing some or all of the embodiments described with reference to FIGS. 1 to 22 will be described with reference to the drawings.

23 is a diagram illustrating a configuration of a user terminal 2300 according to another embodiment.

Referring to FIG. 23, the user terminal 2300 according to the first and second embodiments described above includes a receiver 2310, a controller 2320, and a transmitter 2330.

The receiver 2310 may receive configuration information on subcarrier spacing of a frequency band in which a Positioning Reference Signal (PRS) is transmitted (S1400). The controller 2320 may check configuration information on subcarrier spacing.

According to an example, in order to support different resolutions in connection with the transmission of the positioning reference signal (PRS) for positioning of the terminal, the positioning reference signal (PRS) may be set based on various numerology (numerology). have. NR offers five subcarrier spacings, 15kHz, 30kHz, 60kHz, 120kHz and 240kHz.

As described above, the number of resolutions provided by a time sample of one positioning reference signal (PRS) decreases as the number of numerology having a large subcarrier spacing value decreases. The resolution of the location may be increased.

According to an example, a numerology of a frequency band in which the positioning reference signal PRS is transmitted may be set based on the resolution of the positioning reference signal PRS required for each use case. According to an example, the receiver 2310 may receive configuration information on subcarrier spacing for transmitting the positioning reference signal PRS through higher layer signaling. Alternatively, according to an example, the receiver 2310 may receive configuration information on subcarrier spacing for transmitting the positioning reference signal PRS through a downlink control channel or a downlink data channel.

In NR, two subcarrier spacings are used for data or RS transmission based on a transmission frequency of 6 GHz. Two subcarrier spacing selections may be performed on the positioning reference signal PRS based on a transmission frequency of 6 GHz.

For example, when the transmission frequency is less than 6 GHz, subcarrier spacing may be set to 15 kHz or 30 kHz. In this case, when a relatively low resolution is required for the positioning reference signal PRS, the receiver 2310 may receive the positioning reference signal PRS according to subcarrier spacing of 15 kHz. When a relatively high resolution for the positioning reference signal PRS is required, the receiver 2310 may receive the positioning reference signal PRS according to subcarrier spacing of 30 kHz.

Similarly, when the transmission frequency is 6GHz or more, subcarrier spacing may be set to 60 kHz or 120 kHz. In this case, when a relatively low resolution is required for the positioning reference signal PRS, the receiver 2310 may receive the positioning reference signal PRS according to subcarrier spacing of 60 kHz. When a relatively high resolution for the positioning reference signal PRS is required, the receiver 2310 may receive the positioning reference signal PRS according to subcarrier spacing of 120 kHz.

According to an example, when the terminal simultaneously supports a millimeter wave (mmWave) band of 6GHz or more along with a band of 6GHz or less, the receiver 2310 integrates all numerology to refer to positioning according to the resolution of each use case. It can receive a signal.

According to an embodiment, when transmitting the positioning reference signal (PRS), a number of numerology may be set differently for each transmission period according to each use case based on a single bandwidth part (BWP). For example, different DM settings and location reference signal (PRS) transmission may be possible based on TDM. That is, among the plurality of bandwidth parts constituting the system bandwidth, in the same bandwidth part, a location reference signal (PRS) transmission interval having different resolutions may be set in time intervals. In this case, numerology information and time interval information may be added to the positioning reference signal PRS configuration information.

Through this, the receiver 2310 may receive positioning reference signal PRS signals having different resolutions in different time intervals even in a single bandwidth part BWP. In this case, different resolution adjustments may be made through numerology as described above under the assumption that the positioning reference signal (PRS) pattern is the same.

According to another embodiment, when the positioning reference signal (PRS) is transmitted based on the multiple bandwidth part (multiple BWP), different numerology may be set for each bandwidth part (BWP) according to the use case. have. A different numerology based on multiple BWP simultaneous transmissions is set, and thus the receiver 2310 may receive the positioning reference signal PRS.

According to an example, a positioning reference signal (PRS) signal may be transmitted simultaneously in the full bandwidth part BWP. That is, the base station may set and transmit a positioning reference signal (PRS) based on different numerology (numerology) for each bandwidth part (BWP). Through this, positioning reference signals PRS that satisfy various resolution requirements may be simultaneously transmitted.

 In this case, since only the configuration information may be received through the bandwidth part BWP for the positioning reference signal PRS, higher layer configuration information for transmitting the positioning reference signal PRS may not be needed. However, even in this case, a bandwidth part index (BWP index), a numerology value, and the like may be included in addition to the existing positioning reference signal PRS configuration information.

However, this is merely an example and the present invention is not limited thereto. According to an example, the receiver 2310 may have different neural abilities depending on the use case and the capability of the UE for the bandwidth part BWP of some of the bandwidth parts BWP constituting the system bandwidth. The positioning reference signal PRS may be received on the basis of (numerology).

According to an example, the receiver 2310 may receive a positioning reference signal (PRS) transmitted based on a numerology that satisfies various resolution requirements in consideration of the capability of each terminal. . The base station may perform simultaneous transmission by repeatedly repeating the positioning reference signal PRS having the same resolution requirement to the various bandwidth parts BWP.

Referring again to FIG. 23, the receiver 2310 may receive a positioning reference signal based on setting information about subcarrier spacing.

The receiver 2310 may receive the positioning reference signal based on the setting information about the subcarrier spacing received from the base station. According to an example, the receiver 2310 may further receive configuration information on the transmission bandwidth of the positioning reference signal from the base station and receive the positioning reference signal. For example, it is assumed that each UE performs PDSCH reception through an arbitrary activated bandwidth part (BWP). In this case, the receiver 2310 may receive the positioning reference signal by activating a specific bandwidth part (BWP) in which the positioning reference signal is transmitted for positioning of the terminal.

According to an example, when the bandwidth part (BWP) is set to multiple, the receiver 2310 activates a plurality of specific bandwidth part (BWP) is set to transmit the location reference signal for positioning of the terminal to receive the location reference signal Can be received. In this case, the receiver 2310 may receive the positioning reference signal from the radio resource allocated to the transmission of the positioning reference signal based on the setting information on the transmission pattern of the positioning reference signal within a specific bandwidth.

The NR terminal may detect the positioning reference signal PRS based on the capability of the terminal. According to an example, a positioning reference signal (PRS) signal may be detected based on the capability of the terminal. Whether the terminal receives a multi-bandwidth part (BWP) to receive the positioning reference signal (PRS), the positioning reference signal processing time (PRS processing time) and reporting capability of the terminal (capability) ) Can be considered.

According to an example, it is assumed that the terminal may support a reception function of a multi-bandwidth part (BWP) as well as a reception of a single bandwidth part (BWP). In addition, it is assumed that terminals supporting only the terminal bandwidth part (BWP) and terminals supporting up to the multi-bandwidth part (BWP) may be mixed according to the capability of the terminal.

Single Bandwidth Part (BWP) Receiving In case of a capability supporting terminal, the receiver 2310 may select and receive only a bandwidth part (BWP) suitable for a use case of the terminal itself from the positioning reference signal (PRS) configuration information. have. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

In the case of a terminal supporting a multi-bandwidth part (BWP) reception capability, according to an example, the receiver 2310 may use only the bandwidth part (BWP) that matches the use case of the terminal itself among the positioning reference signal (PRS) configuration information. The positioning reference signal PRS may be received. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

Alternatively, according to another example, the receiver 2310 may receive the positioning reference signal PRS in all bandwidth parts BWP supported by the positioning reference signal PRS configuration information. That is, the terminal may detect the bandwidth part BWP through which all positioning reference signals PRS are transmitted regardless of the use case of the terminal itself. If the same NMR-based positioning reference signal (PRS) is repeatedly transmitted to the multi-bandwidth part (BWP), the terminal receives the positioning reference signal (PRS) through the multi-bandwidth part (BWP) The detection accuracy can be increased.

According to an example, in order to measure the location of the terminal, the receiver 2310 may receive a positioning reference signal from a serving cell and at least two adjacent cells, respectively. The controller 2320 may measure reference signal time difference information between the received positioning reference signals. The transmitter 2330 may transmit RSTD information about the positioning reference signal to the base station. The base station may estimate the cross region based on the RSTD information. Accordingly, the position of the terminal can be estimated.

According to this, in performing positioning in a next-generation wireless network, a flexible configuration for each time interval or bandwidth part is required for a numerology of radio resources used for transmission of positioning reference signals. It is possible to provide a reporting resolution for a suitable location reference signal for various usage scenarios. In addition, in performing positioning in a next-generation wireless network, a reporting resolution suitable for a situation of a terminal may be configured by differently configuring a numerology for a radio resource used for transmitting a positioning reference signal based on the capability of the terminal. (reporting resolution) can be provided. Through this, direct positioning reference signal (PRS) transmission control in consideration of the resolution of the positioning reference signal (PRS) may be possible.

24 is a diagram illustrating a configuration of a base station 2400 according to another embodiment.

Referring to FIG. 24, the base station 2400 according to another embodiment includes a controller 2410, a transmitter 2420, and a receiver 2430.

The controller 2410 controls the overall operation of the base station 2400 according to the method of performing positioning required to perform the above-described present invention. The controller 2410 may configure configuration information on subcarrier spacing of a frequency band in which a Positioning Reference Signal (PRS) is transmitted.

According to an example, in order to support different resolutions in connection with the transmission of the positioning reference signal (PRS) for positioning of the terminal, the controller 2410 may use the positioning reference signal (PRS) in various numerology (numerology) Can be set based on NR offers five subcarrier spacings, 15kHz, 30kHz, 60kHz, 120kHz and 240kHz.

As described above, the number of resolutions provided by a time sample of one positioning reference signal (PRS) decreases as the number of numerology having a large subcarrier spacing value decreases. The resolution of the location may be increased.

According to an example, the controller 2410 may set a numerology of a frequency band in which the positioning reference signal PRS is transmitted based on the resolution of the positioning reference signal PRS required for each use case. . According to an example, the transmitter 2420 may transmit configuration information on subcarrier spacing for the transmission of the positioning reference signal PRS, through higher layer signaling. Alternatively, according to an example, the transmitter 2420 may transmit configuration information on subcarrier spacing for transmitting the positioning reference signal PRS through a downlink control channel or a downlink data channel.

In NR, two subcarrier spacings are used for data or RS transmission based on a transmission frequency of 6 GHz. Two subcarrier spacing selections may be performed on the positioning reference signal PRS based on a transmission frequency of 6 GHz.

For example, when the transmission frequency is less than 6 GHz, the controller 2410 may set the subcarrier spacing to 15 kHz or 30 kHz. In this case, when a relatively low resolution is required for the positioning reference signal PRS, the controller 2410 may select subcarrier spacing of 15 kHz. When a relatively high resolution is required for the positioning reference signal PRS, the controller 2410 may select subcarrier spacing of 30 kHz.

Similarly, when the transmission frequency is 6GHz or more, the controller 2410 may set the subcarrier spacing to 60 kHz or 120 kHz. In this case, when a relatively low resolution is required for the positioning reference signal PRS, the controller 2410 may select subcarrier spacing of 60 kHz. When a relatively high resolution for the positioning reference signal PRS is required, the controller 2410 may select subcarrier spacing of 120 kHz.

According to an example, when the terminal supports a millimeter wave (mmWave) band of 6GHz or more simultaneously with a band of 6GHz or less, the control unit 2410 integrates the entire numerology for the terminal and is appropriate for each use case. Resolution can be applied.

According to an embodiment, when transmitting the positioning reference signal PRS, the controller 2410 may set a different number of numerology for each transmission interval according to each use case based on a single bandwidth part (BWP). For example, the controller 2410 may set different numbers of neuralology based on TDM, and transmit a positioning reference signal PRS through the transmitter 2420. That is, among the plurality of bandwidth parts constituting the system bandwidth, in the same bandwidth part, a location reference signal (PRS) transmission interval having different resolutions may be set in time intervals. In this case, numerology information and time interval information may be added to the positioning reference signal PRS configuration information.

Through this, the transmitter 2420 may transmit positioning reference signal PRS signals having different resolutions even in a single bandwidth part BWP in different time intervals. In this case, different resolution adjustments may be made through numerology as described above under the assumption that the positioning reference signal (PRS) pattern is the same.

According to another embodiment, when the positioning reference signal (PRS) is transmitted based on the multiple bandwidth part (multiple BWP), the control unit 2410 is different from each other by the number of bandwidth parts (BWP) according to the use case (numerology ) Can be set. A different numerology based on multiple BWP simultaneous transmission is set, and accordingly, the transmitter 2420 may transmit a positioning reference signal PRS.

According to an example, the transmitter 2420 may simultaneously transmit a positioning reference signal (PRS) signal in the full bandwidth part BWP. That is, the transmitter 2420 may transmit the positioning reference signal PRS set based on different numerology (numerology) for each bandwidth part (BWP). Through this, positioning reference signals PRS that satisfy various resolution requirements may be simultaneously transmitted.

 In this case, since only the configuration information may be received through the bandwidth part BWP for the positioning reference signal PRS, higher layer configuration information for transmitting the positioning reference signal PRS may not be needed. However, even in this case, a bandwidth part index (BWP index), a numerology value, and the like may be included in addition to the existing positioning reference signal PRS configuration information.

However, this is merely an example and the present invention is not limited thereto. According to an example, the control unit 2410 may be different from each other according to the use case and the capability of the UE for the bandwidth part BWP of the plurality of bandwidth parts BWP constituting the system bandwidth. A positioning reference signal (PRS) may be set based on (numerology) and transmitted through the transmitter 2420.

According to an example, the transmitter 2420 may transmit a positioning reference signal PRS based on a numerology that satisfies various resolution requirements in consideration of the capability of each terminal. The transmitter 2420 may perform simultaneous transmission by repeatedly positioning the positioning reference signal PRS having the same resolution requirement to the various bandwidth parts BWP.

Again, referring to FIG. 24, the transmitter 2420 may transmit a positioning reference signal based on setting information about subcarrier spacing.

The transmitter 2420 may transmit the positioning reference signal to the terminal based on the setting information about the subcarrier spacing. According to an example, the transmitter 2420 may further transmit configuration information on the transmission bandwidth of the positioning reference signal to the terminal and transmit the positioning reference signal based on the corresponding configuration information. For example, it is assumed that each UE performs PDSCH reception through an arbitrary activated bandwidth part (BWP). In this case, each terminal may receive the positioning reference signal by activating a specific bandwidth part (BWP) in which the positioning reference signal is transmitted for positioning of the terminal.

According to an example, when the bandwidth part (BWP) is set to multiple, each terminal to receive a location reference signal by activating a plurality of specific bandwidth part (BWP) is set to transmit a location reference signal for positioning of the terminal Can be. In this case, the terminal may receive the positioning reference signal from a radio resource allocated to the transmission of the positioning reference signal based on the configuration information on the transmission pattern of the positioning reference signal within a specific bandwidth.

The NR terminal may detect the positioning reference signal PRS based on the capability of the terminal. According to an example, a positioning reference signal (PRS) signal may be detected based on the capability of the terminal. Whether the terminal receives a multi-bandwidth part (BWP) to receive the positioning reference signal (PRS), the positioning reference signal processing time (PRS processing time) and reporting capability of the terminal (capability) ) Can be considered.

According to an example, it is assumed that the terminal may support a reception function of a multi-bandwidth part (BWP) as well as a reception of a single bandwidth part (BWP). In addition, it is assumed that terminals supporting only the terminal bandwidth part (BWP) and terminals supporting up to the multi-bandwidth part (BWP) may be mixed according to the capability of the terminal.

Single Bandwidth Part (BWP) Receiving A capability supporting terminal may select and receive only a bandwidth part (BWP) suitable for a use case of the terminal itself from positioning reference signal (PRS) configuration information. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

In the case of a terminal supporting a multi-bandwidth part (BWP) reception capability, according to an example, the positioning reference signal is selected by selecting only a bandwidth part (BWP) that fits the use case of the terminal itself from the positioning reference signal (PRS) configuration information. (PRS) can be received. In this case, the terminal may ignore the positioning reference signal (PRS) signal transmitted in another bandwidth part (BWP).

Alternatively, according to another example, the terminal may receive the positioning reference signal PRS in all bandwidth parts BWP supported by the positioning reference signal PRS configuration information. That is, the terminal may detect the bandwidth part BWP through which all positioning reference signals PRS are transmitted regardless of the use case of the terminal itself. If the same NMR-based positioning reference signal (PRS) is repeatedly transmitted to the multi-bandwidth part (BWP), the terminal receives the positioning reference signal (PRS) through the multi-bandwidth part (BWP) The detection accuracy can be increased.

According to an example, in order to measure the location of the terminal, the terminal may receive a positioning reference signal from a serving cell and at least two adjacent cells, respectively. The terminal may measure reference signal time difference information between the received positioning reference signals. The receiver 2430 may receive RSTD information about the positioning reference signal from the terminal. The controller 2410 may estimate the cross region based on the RSTD information. Accordingly, the position of the terminal can be estimated.

According to this, in performing positioning in a next-generation wireless network, a flexible configuration for each time interval or bandwidth part is required for a numerology of radio resources used for transmission of positioning reference signals. It is possible to provide a reporting resolution for a suitable location reference signal for various usage scenarios. In addition, in performing positioning in a next-generation wireless network, a reporting resolution suitable for a situation of a terminal may be configured by differently configuring a numerology for a radio resource used for transmitting a positioning reference signal based on the capability of the terminal. (reporting resolution) can be provided. Through this, direct positioning reference signal (PRS) transmission control in consideration of the resolution of the positioning reference signal (PRS) may be possible.

In the above, it has been described on the premise that the terminal receives the configuration information for the subcarrier spacing of the frequency band to which the positioning reference signal (PRS) is transmitted from the base station. Hereinafter, according to another embodiment of the present disclosure, a case in which configuration information for subcarrier spacing of a frequency band in which the positioning reference signal PRS is transmitted is not separately received will be described. In the following, description of the content overlapping with the above description will be omitted. However, the above description can be applied to the embodiments to be described below, in the same way, within the scope of the contradiction.

25 is a diagram illustrating a procedure of performing positioning by a terminal according to another embodiment.

Referring to FIG. 25, the terminal may receive control information related to a downlink channel (S2500). According to an example, the control information related to the downlink channel may include a PDCCH in which control resource set # 0 (CORESET # 0) is received, a PBCH in which a Synchronization Signal Block (SSB) is received, or a PDSCH in which a Remaining Minimum System Information (RMSI) is received. It may be preset to at least one of a control channel or a synchronization signal block (SSB) associated with the.

Referring back to FIG. 25, the terminal may determine the subcarrier spacing information of the frequency band in which the control information is received as the subcarrier spacing information of the frequency band in which the positioning reference signal is transmitted (S2510). That is, the terminal may determine that the positioning reference signal is to be transmitted using the subcarrier spacing information of the frequency band in which the predetermined control information is received.

Referring back to FIG. 25, the terminal may receive a positioning reference signal from the base station based on the determined subcarrier spacing information (S2520).

Accordingly, even when the subcarrier spacing information of the frequency band in which the positioning reference signal is transmitted is not set separately, the positioning reference signal may be transmitted to the terminal.

26 is a diagram illustrating a procedure for positioning by a base station according to another embodiment.

Referring to FIG. 26, the base station may transmit control information related to a downlink channel to the terminal (S2600). According to an example, the control information related to the downlink channel may include a PDCCH in which control resource set # 0 (CORESET # 0) is received, a PBCH in which a Synchronization Signal Block (SSB) is received, or a PDSCH in which a Remaining Minimum System Information (RMSI) is received. It may be preset to at least one of a control channel or a synchronization signal block (SSB) associated with the.

Referring back to FIG. 26, the base station may configure subcarrier spacing information of a frequency band in which control information is transmitted as subcarrier spacing information of a frequency band in which the positioning reference signal is transmitted (S2610). That is, the base station may be configured to transmit the positioning reference signal using the subcarrier spacing information of the frequency band in which predetermined control information is transmitted.

Referring back to FIG. 26, the base station may transmit a positioning reference signal to the terminal based on the configured subcarrier spacing information (S2620).

Accordingly, even when the subcarrier spacing information of the frequency band in which the positioning reference signal is transmitted is not set separately, the positioning reference signal may be transmitted to the terminal.

According to another embodiment of the present disclosure, referring to FIG. 23, the receiver 2310 of the terminal may receive control information related to a downlink channel. According to an example, the control information related to the downlink channel may include a PDCCH in which control resource set # 0 (CORESET # 0) is received, a PBCH in which a Synchronization Signal Block (SSB) is received, or a PDSCH in which a Remaining Minimum System Information (RMSI) is received. It may be preset to at least one of a control channel or a synchronization signal block (SSB) associated with the.

The control unit 2320 of the terminal may determine the subcarrier spacing information of the frequency band in which the control information is received as the subcarrier spacing information of the frequency band in which the positioning reference signal is transmitted. That is, the controller 2320 may determine that the positioning reference signal is to be transmitted using the subcarrier spacing information of the frequency band in which the predetermined control information is received.

In this case, the receiver 2310 may receive the positioning reference signal based on the determined subcarrier spacing information.

Accordingly, even when the subcarrier spacing information of the frequency band in which the positioning reference signal is transmitted is not set separately, the positioning reference signal may be transmitted to the terminal.

According to another embodiment of the present disclosure, referring to FIG. 24, the transmitter 2420 of the base station may transmit control information related to a downlink channel to the terminal. According to an example, the control information related to the downlink channel may include a PDCCH in which control resource set # 0 (CORESET # 0) is received, a PBCH in which a Synchronization Signal Block (SSB) is received, or a PDSCH in which a Remaining Minimum System Information (RMSI) is received. It may be preset to at least one of a control channel or a synchronization signal block (SSB) associated with the.

The control unit 2410 of the base station may configure the subcarrier spacing information of the frequency band in which the control information is transmitted as the subcarrier spacing information of the frequency band in which the positioning reference signal is transmitted. That is, the controller 2410 may be configured to transmit the positioning reference signal using the subcarrier spacing information of the frequency band in which predetermined control information is transmitted.

The transmitter 2420 may transmit the positioning reference signal to the terminal based on the configured subcarrier spacing information.

Accordingly, even when the subcarrier spacing information of the frequency band in which the positioning reference signal is transmitted is not set separately, the positioning reference signal may be transmitted to the terminal.

The above-described embodiments may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802, 3GPP and 3GPP2. That is, steps, components, and parts which are not described in order to clearly reveal the present technical spirit of the embodiments may be supported by the aforementioned standard documents. In addition, all terms disclosed herein may be described by the standard documents disclosed above.

The above-described embodiments may be implemented through various means. For example, the embodiments may be implemented by hardware, firmware, software, or a combination thereof.

In the case of a hardware implementation, the method according to the embodiments may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), FPGAs. (Field Programmable Gate Arrays), a processor, a controller, a microcontroller, a microprocessor, and the like.

In the case of an implementation by firmware or software, the method according to the embodiments may be implemented in the form of an apparatus, procedure, or function for performing the functions or operations described above. The software code may be stored in a memory unit and driven by a processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

In addition, the terms "system", "processor", "controller", "component", "module", "interface", "model" and "unit" described above generally refer to computer-related entity hardware, hardware and software. May mean a combination, software, or running software. For example, the aforementioned components may be, but are not limited to, a process driven by a processor, a processor, a controller, a control processor, an object, an execution thread, a program, and / or a computer. For example, both an application running on a controller or processor and a controller or processor can be components. One or more components can reside within a process and / or thread of execution and a component can be located on one system or deployed on more than one system.

The above description and the accompanying drawings are merely illustrative of the technical idea, and a person of ordinary skill in the art may combine, separate, substitute, and substitute the components without departing from the essential characteristics of the present technology. Many modifications and variations, including variations, are possible. Accordingly, the embodiments disclosed herein are not intended to limit the present invention, but to describe the present invention, and the scope of the present invention is not limited thereto. The scope of protection of the technical idea should be interpreted by the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present specification.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application is related to the patent application No. 10-2018-0051674 filed in Korea on May 04, 2018 and Patent Application No. 10-2019-0050231 filed in Korea on April 30, 2019. Priority is claimed under section (a) (35 USC § 119 (a)), all of which is incorporated by reference in this patent application. In addition, if this patent application claims priority for the same reason for countries other than the United States, all its contents are incorporated into this patent application by reference.

Claims (15)

1. In the method for the terminal performs positioning (positioning),

   Receiving configuration information on subcarrier spacing in a frequency band in which a Positioning Reference Signal (PRS) is transmitted; And

   Receiving the positioning reference signal based on the setting information for the subcarrier spacing.
2. The method of claim 1,

   Setting information for the subcarrier spacing,

   Method received via higher layer signaling.
3. The method of claim 1,

   Setting information for the subcarrier spacing,

   And configuring each time period during which the positioning reference signal is transmitted.
4. The method of claim 1,

   Setting information for the subcarrier spacing,

   And configuring each bandwidth part (BWP) in which the positioning reference signal is transmitted.
5. The method of claim 1,

   Receiving the positioning reference signal,

   And receiving the positioning reference signal according to the subcarrier spacing determined based on the capability of the terminal.
6. In the method for the positioning (base station) positioning (base station),

   Configuring setting information on subcarrier spacing in a frequency band in which a Positioning Reference Signal (PRS) is transmitted; And

   Transmitting the positioning reference signal based on the setting information for the subcarrier spacing.
7. The method of claim 6,

   Setting information for the subcarrier spacing,

   Method transmitted through higher layer signaling.
8. The method of claim 6,

   Setting information for the subcarrier spacing,

   And configuring each time period during which the positioning reference signal is transmitted.
9. The method of claim 6,

   Setting information for the subcarrier spacing,

   And configuring each bandwidth part (BWP) in which the positioning reference signal is transmitted.
10. The method of claim 6,

    Transmitting the positioning reference signal,

    And transmitting the positioning reference signal according to the subcarrier spacing determined based on the capability of the terminal.
11. In the terminal that performs positioning (positioning),

    Receiving unit for receiving the configuration information on the subcarrier spacing of the frequency band to which the Positioning Reference Signal (PRS) is transmitted, and receiving the positioning reference signal based on the configuration information for the subcarrier spacing Terminal comprising a.
12. The method of claim 11,

    Setting information for the subcarrier spacing,

    UE received through higher layer signaling.
13. The method of claim 11,

    Setting information for the subcarrier spacing,

    And a terminal configured for each time period in which the positioning reference signal is transmitted.
14. The method of claim 11,

    Setting information for the subcarrier spacing,

    A terminal configured for each bandwidth part (BWP) in which the positioning reference signal is transmitted.
15. The method of claim 11,

    The receiving unit,

    And receiving the positioning reference signal according to the subcarrier spacing determined based on the capability of the terminal.

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