WO2021034050A1

WO2021034050A1 - Method for receiving positioning reference signal and apparatus therefor

Info

Publication number: WO2021034050A1
Application number: PCT/KR2020/010892
Authority: WO
Inventors: 차현수; 윤석현
Original assignee: 엘지전자 주식회사
Priority date: 2019-08-16
Filing date: 2020-08-14
Publication date: 2021-02-25

Abstract

Disclosed is a method for receiving a positioning reference signal (PRS) by means of a terminal in a wireless communication system. In particular, the method comprises: receiving information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set; determining a transmission beam used for transmission of the PRS via the plurality of PRS resources, on the basis of the information on the PRS resource set; and receiving the PRS via the plurality of PRS resources, on the basis of the determination on the transmission beam, wherein the information on the PRS resource set may inform that the same transmission beam is used for the plurality of PRS resources.

Description

Method for receiving position reference signal and apparatus therefor

The present invention relates to a method and apparatus for receiving a location reference signal, and more particularly, to a method and apparatus for setting a resource for receiving a location reference signal.

As more communication devices require greater communication traffic as the times flow, a next-generation 5G system, which is a wireless broadband communication improved over the existing LTE system, is required. In this next-generation 5G system, called NewRAT, communication scenarios are classified into Enhanced Mobile BroadBand (eMBB)/Ultra-reliability and low-latency communication (URLLC)/Massive Machine-Type Communications (mMTC).

Here, eMBB is a next-generation mobile communication scenario with features such as High Spectrum Efficiency, High User Experienced Data Rate, and High Peak Data Rate, and URLLC is a next-generation mobile communication scenario with features such as Ultra Reliable, Ultra Low Latency, and Ultra High Availability. And (eg, V2X, Emergency Service, Remote Control), mMTC is a next-generation mobile communication scenario with characteristics of Low Cost, Low Energy, Short Packet, and Massive Connectivity. (e.g., IoT).

The present invention is to provide a method for receiving a position reference signal and an apparatus therefor.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. I will be able to.

In a method for a terminal to receive a Positioning Reference Signal (PRS) in a wireless communication system according to an embodiment of the present invention, information on a PRS resource set and a plurality of information included in the PRS resource set Receiving information on PRS resources, determining a transmission beam used for transmission of PRS through the plurality of PRS resources, based on information on the PRS resource set, and determining the transmission beam Based on, the PRS is received through the plurality of PRS resources, and the information on the PRS resource set may indicate that the transmission beam is the same for the plurality of PRS resources.

In this case, the information on the PRS resource set may be an index of the PRS resource set.

In addition, the terminal may further receive information on the PRS resource set and a cell related to the plurality of PRS resources.

In addition, information on the PRS resource set and information on the plurality of PRS resources may be set independently from information on the cell.

In addition, the positioning of the terminal may be performed based on the PRS.

A terminal receiving a Positioning Reference Signal (PRS) in a wireless communication system according to the present invention, comprising: at least one transceiver; At least one processor; And at least one memory that is operatively connected to the at least one processor and stores instructions for causing the at least one processor to perform a specific operation when executed, wherein the specific operation includes: PRS Receiving information on a resource set and information on a plurality of PRS resources included in the PRS resource set, and transmission of a PRS through the plurality of PRS resources based on the information on the PRS resource set A transmission beam used for is determined, and based on the determination on the transmission beam, the PRS is received through the plurality of PRS resources, and the information on the PRS resource set includes the transmission beam. The same point can be announced for PRS resources.

In addition, the specific operation may include further receiving information on the PRS resource set and a cell related to the plurality of PRS resources.

In addition, the positioning of the terminal may be performed based on the PRS.

An apparatus for receiving a Positioning Reference Signal (PRS) in a wireless communication system according to the present invention, comprising: at least one transceiver; At least one processor; And at least one memory that is operatively connected to the at least one processor and stores instructions for causing the at least one processor to perform a specific operation when executed, wherein the specific operation includes: PRS Receiving information on a resource set and information on a plurality of PRS resources included in the PRS resource set, and transmission of a PRS through the plurality of PRS resources based on the information on the PRS resource set A transmission beam used for is determined, and based on the determination on the transmission beam, the PRS is received through the plurality of PRS resources, and the information on the PRS resource set includes the transmission beam. The same point can be announced for PRS resources.

In a method for a network node to transmit a Positioning Reference Signal (PRS) in a wireless communication system according to an embodiment of the present invention, information on a PRS resource set and a plurality of information included in the PRS resource set Transmitting information on the PRS resources of the PRS, transmitting the PRS through the plurality of PRS resources, the transmission beam used for transmission of the PRS through the plurality of PRS resources is the same, the PRS resource The information on the set may indicate that the transmission beam is the same for the plurality of PRS resources.

A network node for transmitting a Positioning Reference Signal (PRS) in a wireless communication system according to the present invention, comprising: at least one transceiver; At least one processor; And at least one memory that is operatively connected to the at least one processor and stores instructions for causing the at least one processor to perform a specific operation when executed, wherein the specific operation includes: PRS Transmitting information on a resource set and information on a plurality of PRS resources included in the PRS resource set, transmitting a PRS through the plurality of PRS resources, and the PRS through the plurality of PRS resources The transmission beam used for transmission of is the same, and the information on the PRS resource set may inform that the transmission beam is the same for the plurality of PRS resources.

A computer readable storage medium according to the present invention, wherein the computer readable storage medium comprises instructions for causing the at least one processor to perform operations for a user device when executed by at least one processor. One computer program is stored, and the operations include receiving information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set, and receiving information on the PRS resource set. Based on the determination of a transmission beam used for transmission of a PRS through the plurality of PRS resources, based on the determination of the transmission beam, receiving the PRS through the plurality of PRS resources, and the The information on the PRS resource set may indicate that the transmission beam is the same for the plurality of PRS resources.

According to the present invention, by appropriately setting resources for a location reference signal, a terminal can more efficiently receive a location reference signal.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those of ordinary skill in the art from the following description. will be.

1 is a diagram showing the structure of a control plane and a user plane of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard.

FIG. 2 is a diagram illustrating physical channels used in a 3GPP system and a general signal transmission method using them.

3 shows an example in which a PRS (Positioning Reference Signal) is mapped in an LTE system.

4 to 5 are diagrams for explaining the architecture of a system for measuring the location of the UE and a procedure for measuring the location of the UE.

6 is a diagram illustrating an example of a protocol layer for supporting transmission of an LTE Positioning Protocol (LPP) message.

7 is a diagram showing an example of a protocol layer for supporting NRPPa (NR Positioning Protocol A) PDU (Protocol Data Unit) transmission.

8 is a diagram for explaining an embodiment of an OTDOA (Observed Time Difference Of Arrival) positioning method.

9 is a diagram for explaining an embodiment of a multi-RTT (round trip time) positioning method.

10 to 11 are diagrams for explaining an example of an operation implementation of a terminal and a network node according to an embodiment of the present invention.

12 shows an example of a communication system to which embodiments of the present disclosure are applied.

13 to 16 illustrate examples of various wireless devices to which embodiments of the present disclosure are applied.

17 shows an example of a location server to which embodiments of the present disclosure are applied.

The configuration, operation, and other features of the present invention may be easily understood by the embodiments of the present invention described with reference to the accompanying drawings. The embodiments described below are examples in which the technical features of the present invention are applied to a 3GPP system.

Although this specification describes an embodiment of the present invention using an LTE system, an LTE-A system and an NR system, this is an example and the embodiment of the present invention can be applied to any communication system corresponding to the above definition.

In addition, in the present specification, the name of the base station may be used as a generic term including a remote radio head (RRH), an eNB, a transmission point (TP), a reception point (RP), a relay, and the like.

3GPP-based communication standards include downlink physical channels corresponding to resource elements carrying information originating from higher layers, and downlink corresponding to resource elements used by the physical layer but not carrying information originating from higher layers. Physical signals are defined. For example, a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), a physical multicast channel (PMCH), a physical control format indicator channel (physical control) A format indicator channel, PCFICH), a physical downlink control channel (PDCCH), and a physical hybrid ARQ indicator channel (PHICH) are defined as downlink physical channels, and a reference signal and a synchronization signal Is defined as downlink physical signals. A reference signal (RS), also referred to as a pilot, refers to a signal of a predefined special waveform that the gNB and the UE know each other, for example, cell specific RS (RS), UE- Specific RS (UE-specific RS, UE-RS), positioning RS (positioning RS, PRS), and channel state information RS (channel state information RS, CSI-RS) are defined as downlink reference signals. The 3GPP LTE/LTE-A standard corresponds to uplink physical channels corresponding to resource elements carrying information originating from an upper layer, and resource elements used by the physical layer but not carrying information originating from an upper layer. Uplink physical signals are defined. For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are used as uplink physical channels. A demodulation reference signal (DMRS) for an uplink control/data signal and a sounding reference signal (SRS) used for uplink channel measurement are defined.

In the present invention, PDCCH (Physical Downlink Control CHannel) / PCFICH (Physical Control Format Indicator CHannel) / PHICH ((Physical Hybrid automatic retransmit request Indicator CHannel) / PDSCH (Physical Downlink Shared CHannel) is DCI (Downlink Control Information) / CFI ( Control Format Indicator) / Downlink ACK / NACK (ACKnowlegement / Negative ACK) / refers to a set of time-frequency resources carrying downlink data or a set of resource elements In addition, PUCCH (Physical Uplink Control CHannel) / PUSCH (Physical Uplink Shared CHannel)/PRACH (Physical Random Access CHannel) refers to a set of time-frequency resources or a set of resource elements each carrying uplink control information (UCI)/uplink data/random access signals. , PDCCH/PCFICH/PHICH/PDSCH/PUCCH/PUSCH/PRACH allocated to or belonging to a time-frequency resource or resource element (RE), respectively, PDCCH/PCFICH/PHICH/PDSCH/PUCCH/PUSCH/PRACH RE or PDCCH It is referred to as /PCFICH/PHICH/PDSCH/PUCCH/PUSCH/PRACH resource In the following, the expression that the user equipment transmits PUCCH/PUSCH/PRACH is, respectively, uplink control information/uplink data on or through PUSCH/PUCCH/PRACH. /It is used in the same meaning as that of transmitting a random access signal.In addition, the expression that gNB transmits PDCCH/PCFICH/PHICH/PDSCH is on the PDCCH/PCFICH/PHICH/PDSCH, respectively. It is used in the same meaning as transmitting downlink data/control information through or through.

Hereinafter, CRS/DMRS/CSI-RS/SRS/UE-RS are allocated or configured OFDM symbols/subcarriers/REs are CRS/DMRS/CSI-RS/SRS/UE-RS symbols/carriers. It is called /subcarrier/RE. For example, an OFDM symbol to which a tracking RS (TRS) is allocated or configured is referred to as a TRS symbol, and a subcarrier to which a TRS is allocated or configured is referred to as a TRS subcarrier, and a TRS is allocated. Alternatively, the configured RE is referred to as TRS RE. In addition, a subframe configured for TRS transmission is referred to as a TRS subframe. In addition, a subframe in which a broadcast signal is transmitted is referred to as a broadcast subframe or a PBCH subframe, and a subframe in which a synchronization signal (eg, PSS and/or SSS) is transmitted is a synchronization signal subframe or a PSS/SSS subframe. It is called. An OFDM symbol/subcarrier/RE to which PSS/SSS is assigned or configured is referred to as PSS/SSS symbol/subcarrier/RE, respectively.

In the present invention, a CRS port, a UE-RS port, a CSI-RS port, and a TRS port respectively refer to an antenna port configured to transmit a CRS, an antenna port configured to transmit a UE-RS, Refers to an antenna port configured to transmit CSI-RS and an antenna port configured to transmit TRS. The antenna ports configured to transmit CRSs can be distinguished from each other by the positions of the REs occupied by the CRS according to the CRS ports, and the antenna ports configured to transmit UE-RSs are UE -According to the RS ports, the positions of the REs occupied by the UE-RS can be divided, and the antenna ports configured to transmit CSI-RSs are occupied by the CSI-RS according to the CSI-RS ports. It can be distinguished from each other by the location of the REs. Therefore, the term CRS/UE-RS/CSI-RS/TRS port is also used as a term to mean a pattern of REs occupied by CRS/UE-RS/CSI-RS/TRS within a certain resource area.

<인공 지능(AI: Artificial Intelligence)><Artificial Intelligence (AI)>

Artificial intelligence refers to the field of researching artificial intelligence or the methodology to create it, and machine learning (Machine Learning) refers to the field of researching methodologies to define and solve various problems dealt with in the field of artificial intelligence. do. Machine learning is also defined as an algorithm that improves the performance of a task through continuous experience.

An artificial neural network (ANN) is a model used in machine learning, and may refer to an overall model with problem-solving capabilities, composed of artificial neurons (nodes) that form a network by combining synapses. The artificial neural network may be defined by a connection pattern between neurons of different layers, a learning process for updating model parameters, and an activation function for generating an output value.

The artificial neural network may include an input layer, an output layer, and optionally one or more hidden layers. Each layer includes one or more neurons, and the artificial neural network may include neurons and synapses connecting neurons. In an artificial neural network, each neuron can output a function of an activation function for input signals, weights, and biases input through synapses.

Model parameters refer to parameters determined through learning, and include weights of synaptic connections and biases of neurons. In addition, hyperparameters refer to parameters that must be set before learning in a machine learning algorithm, and include a learning rate, iteration count, mini-batch size, and initialization function.

The purpose of learning artificial neural networks can be seen as determining model parameters that minimize the loss function. The loss function can be used as an index to determine an optimal model parameter in the learning process of the artificial neural network.

Machine learning can be classified into supervised learning, unsupervised learning, and reinforcement learning according to the learning method.

Supervised learning refers to a method of training an artificial neural network when a label for training data is given, and a label indicates the correct answer (or result value) that the artificial neural network should infer when training data is input to the artificial neural network. It can mean. Unsupervised learning may refer to a method of training an artificial neural network in a state where a label for training data is not given. Reinforcement learning may mean a learning method in which an agent defined in a certain environment learns to select an action or action sequence that maximizes the cumulative reward in each state.

Among artificial neural networks, machine learning implemented as a deep neural network (DNN) including a plurality of hidden layers is sometimes referred to as deep learning (deep learning), and deep learning is a part of machine learning. Hereinafter, machine learning is used in the sense including deep learning.

<로봇(Robot)><Robot>

A robot may refer to a machine that automatically processes or operates a task given by its own capabilities. In particular, a robot having a function of recognizing the environment and performing an operation by self-determining may be referred to as an intelligent robot.

Robots can be classified into industrial, medical, household, military, etc. depending on the purpose or field of use.

The robot may be provided with a driving unit including an actuator or a motor to perform various physical operations such as moving a robot joint. In addition, the movable robot includes a wheel, a brake, a propeller, etc. in a driving unit, and can travel on the ground or fly in the air through the driving unit.

<자율 주행(Self-Driving, Autonomous-Driving)><Self-Driving, Autonomous-Driving>

Autonomous driving refers to self-driving technology, and autonomous driving vehicle refers to a vehicle that is driven without a user's manipulation or with a user's minimal manipulation.

For example, in autonomous driving, a technology that maintains a driving lane, a technology that automatically adjusts the speed such as adaptive cruise control, a technology that automatically drives along a specified route, and a technology that automatically sets a route when a destination is set, etc. All of these can be included.

The vehicle includes all vehicles including only an internal combustion engine, a hybrid vehicle including an internal combustion engine and an electric motor, and an electric vehicle including only an electric motor, and may include a train, a motorcycle, etc.

In this case, the autonomous vehicle can be viewed as a robot having an autonomous driving function.

<확장 현실(XR: eXtended Reality)><Extended Reality (XR: eXtended Reality)>

Extended reality is a generic term for virtual reality (VR), augmented reality (AR), and mixed reality (MR). VR technology provides only CG images of real world objects or backgrounds, AR technology provides virtually created CG images on top of real object images, and MR technology is a computer that mixes and combines virtual objects in the real world. It is a graphic technology.

MR technology is similar to AR technology in that it shows real and virtual objects together. However, in AR technology, virtual objects are used in a form that complements real objects, whereas in MR technology, virtual objects and real objects are used with equal characteristics.

XR technology can be applied to HMD (Head-Mount Display), HUD (Head-Up Display), mobile phones, tablet PCs, laptops, desktops, TVs, digital signage, etc., and devices applied with XR technology are XR devices. It can be called as.

Now, let's look at 5G communication including the NR system.

The three main requirements areas for 5G are (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area, and (3) ultra-reliability and It includes a low-latency communication (Ultra-reliable and Low Latency Communications, URLLC) area.

In some use cases, multiple areas may be required for optimization, and other use cases may be focused on only one key performance indicator (KPI). 5G supports these various use cases in a flexible and reliable way.

eMBB goes far beyond basic mobile Internet access, covering rich interactive work, media and entertainment applications in the cloud or augmented reality. Data is one of the key drivers of 5G, and it may not be possible to see dedicated voice services for the first time in the 5G era. In 5G, voice is expected to be processed as an application program simply using the data connection provided by the communication system. The main reasons for the increased traffic volume are an increase in content size and an increase in the number of applications requiring high data rates. Streaming services (audio and video), interactive video and mobile Internet connections will become more widely used as more devices connect to the Internet. Many of these applications require always-on connectivity to push real-time information and notifications to the user. Cloud storage and applications are increasing rapidly in mobile communication platforms, which can be applied to both work and entertainment. And, cloud storage is a special use case that drives the growth of the uplink data rate. 5G is also used for remote work in the cloud, and requires much lower end-to-end delays to maintain a good user experience when tactile interfaces are used. Entertainment For example, cloud gaming and video streaming is another key factor that is increasing the demand for mobile broadband capabilities. Entertainment is essential on smartphones and tablets anywhere, including high mobility environments such as trains, cars and airplanes. Another use case is augmented reality and information retrieval for entertainment. Here, augmented reality requires very low latency and an instantaneous amount of data.

In addition, one of the most anticipated 5G use cases relates to the ability to seamlessly connect embedded sensors in all fields, i.e. mMTC. By 2020, potential IoT devices are expected to reach 20.4 billion. Industrial IoT is one of the areas where 5G plays a major role in enabling smart cities, asset tracking, smart utilities, agriculture and security infrastructure.

URLLC includes new services that will transform the industry with ultra-reliable/low-latency links such as self-driving vehicles and remote control of critical infrastructure. The level of reliability and delay is essential for smart grid control, industrial automation, robotics, drone control and coordination.

Next, a number of examples of use in 5G communication systems including NR systems will be described in more detail.

5G can complement fiber-to-the-home (FTTH) and cable-based broadband (or DOCSIS) as a means of providing streams rated at hundreds of megabits per second to gigabits per second. This high speed is required to deliver TVs in 4K or higher (6K, 8K and higher) resolutions as well as virtual and augmented reality. Virtual Reality (VR) and Augmented Reality (AR) applications involve almost immersive sports events. Certain application programs may require special network settings. In the case of VR games, for example, game companies may need to integrate core servers with network operators' edge network servers to minimize latency.

Automotive is expected to be an important new driving force in 5G, with many use cases for mobile communication to vehicles. For example, entertainment for passengers demands simultaneous high capacity and high mobility mobile broadband. The reason is that future users will continue to expect high-quality connections, regardless of their location and speed. Another application example in the automotive field is an augmented reality dashboard. It identifies an object in the dark on top of what the driver is looking through the front window, and displays information that tells the driver about the distance and movement of the object overlaid. In the future, wireless modules enable communication between vehicles, exchange of information between the vehicle and supporting infrastructure, and exchange of information between the vehicle and other connected devices (eg, devices carried by pedestrians). The safety system allows the driver to lower the risk of accidents by guiding alternative courses of action to make driving safer. The next step will be a remote controlled or self-driven vehicle. It is very reliable and requires very fast communication between different self-driving vehicles and between the vehicle and the infrastructure. In the future, self-driving vehicles will perform all driving activities, and drivers will be forced to focus only on traffic anomalies that the vehicle itself cannot identify. The technical requirements of self-driving vehicles call for ultra-low latency and ultra-fast reliability to increase traffic safety to levels unachievable by humans.

Smart cities and smart homes, referred to as smart society, will be embedded with high-density wireless sensor networks. A distributed network of intelligent sensors will identify the conditions for cost and energy-efficient maintenance of a city or home. A similar setup can be done for each household. Temperature sensors, window and heating controllers, burglar alarms and appliances are all wirelessly connected. Many of these sensors are typically low data rates, low power and low cost. However, for example, real-time HD video may be required in certain types of devices for surveillance.

The consumption and distribution of energy, including heat or gas, is highly decentralized, requiring automated control of distributed sensor networks. The smart grid interconnects these sensors using digital information and communication technologies to collect information and act accordingly. This information can include the behavior of suppliers and consumers, allowing smart grids to improve efficiency, reliability, economics, sustainability of production and the distribution of fuels such as electricity in an automated way. The smart grid can also be viewed as another low-latency sensor network.

The health sector has many applications that can benefit from mobile communications. The communication system can support telemedicine providing clinical care from remote locations. This can help reduce barriers to distance and improve access to medical services that are not consistently available in remote rural areas. It is also used to save lives in critical care and emergencies. A wireless sensor network based on mobile communication may provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

Wireless and mobile communications are becoming increasingly important in industrial applications. Wiring is expensive to install and maintain. Thus, the possibility of replacing cables with reconfigurable wireless links is an attractive opportunity for many industries. However, achieving this requires that the wireless connection operates with a delay, reliability and capacity similar to that of the cable, and its management is simplified. Low latency and very low error probability are new requirements that need to be connected to 5G.

Logistics and freight tracking are important use cases for mobile communications that enable tracking of inventory and packages from anywhere using location-based information systems. Logistics and freight tracking use cases typically require low data rates, but require a wide range and reliable location information.

1 is a diagram showing the structure of a control plane and a user plane of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard. The control plane refers to a path through which control messages used by a user equipment (UE) and a network to manage a call are transmitted. The user plane refers to a path through which data generated in the application layer, for example, voice data or Internet packet data, is transmitted.

The first layer, the physical layer, provides an information transfer service to an upper layer using a physical channel. The physical layer is connected to the upper medium access control layer through a transmission channel (transport channel). Data is transferred between the medium access control layer and the physical layer through the transmission channel. Data moves between the physical layers of the transmitting side and the receiving side through a physical channel. The physical channel uses time and frequency as radio resources. Specifically, a physical channel is modulated in an Orthogonal Frequency Division Multiple Access (OFDMA) scheme in downlink and a single carrier frequency division multiple access (SC-FDMA) scheme in uplink.

The medium access control (MAC) layer of the second layer provides a service to an upper layer, the Radio Link Control (RLC) layer, through a logical channel. The RLC layer of the second layer supports reliable data transmission. The function of the RLC layer may be implemented as a functional block inside the MAC. The PDCP (Packet Data Convergence Protocol) layer of the second layer performs a header compression function that reduces unnecessary control information in order to efficiently transmit IP packets such as IPv4 or IPv6 over a narrow bandwidth wireless interface.

The radio resource control (RRC) layer located at the bottom of the third layer is defined only in the control plane. The RRC layer is in charge of controlling logical channels, transmission channels, and physical channels in relation to configuration, re-configuration, and release of radio bearers. The radio bearer refers to a service provided by the second layer for data transmission between the terminal and the network. To this end, the UE and the RRC layer of the network exchange RRC messages with each other. If there is an RRC connection (RRC Connected) between the terminal and the RRC layer of the network, the terminal is in an RRC connected state (Connected Mode), otherwise it is in the RRC idle state (Idle Mode). The NAS (Non-Access Stratum) layer above the RRC layer performs functions such as session management and mobility management.

The downlink transmission channel for transmitting data from the network to the terminal includes a broadcast channel (BCH) that transmits system information, a paging channel (PCH) that transmits paging messages, and a downlink shared channel (SCH) that transmits user traffic or control messages. have. In the case of a downlink multicast or broadcast service traffic or control message, it may be transmitted through a downlink SCH or a separate downlink multicast channel (MCH). Meanwhile, as an uplink transmission channel for transmitting data from a terminal to a network, there are a random access channel (RACH) for transmitting an initial control message, and an uplink shared channel (SCH) for transmitting user traffic or control messages. It is located above the transmission channel, and the logical channels mapped to the transmission channel include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), MTCH (Multicast). Traffic Channel).

When the terminal is powered on or newly enters a cell, the terminal performs an initial cell search operation such as synchronizing with the base station (S201). To this end, the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station to synchronize with the base station and obtain information such as cell ID. have. Thereafter, the terminal may receive a physical broadcast channel from the base station to obtain intra-cell broadcast information. Meanwhile, the UE may check the downlink channel state by receiving a downlink reference signal (DL RS) in the initial cell search step.

After completing the initial cell search, the UE acquires more detailed system information by receiving a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Control Channel (PDSCH) according to the information carried on the PDCCH. It can be done (S202).

Meanwhile, when accessing the base station for the first time or when there is no radio resource for signal transmission, the terminal may perform a random access procedure (RACH) for the base station (steps S203 to S206). To this end, the UE transmits a specific sequence as a preamble through a physical random access channel (PRACH) (S203 and S205), and may receive a response message for the preamble through a PDCCH and a corresponding PDSCH ( S204 and S206). In the case of contention-based RACH, a contention resolution procedure may be additionally performed.

After performing the above-described procedure, the UE receives PDCCH/PDSCH (S207) and Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel as a general uplink/downlink signal transmission procedure. Control Channel; PUCCH) transmission (S208) may be performed. In particular, the terminal receives downlink control information (DCI) through the PDCCH. Here, the DCI includes control information such as resource allocation information for the terminal, and the format is different according to the purpose of use.

On the other hand, the control information transmitted by the terminal to the base station through the uplink or received from the base station by the terminal is a downlink/uplink ACK/NACK signal, a channel quality indicator (CQI), a precoding matrix index (PMI), a rank indicator (RI). ), etc. In the case of a 3GPP LTE system, the terminal may transmit control information such as CQI/PMI/RI described above through PUSCH and/or PUCCH.

Meanwhile, the NR system is considering a method of using a high ultra-high frequency band, that is, a millimeter frequency band of 6 GHz or higher to transmit data while maintaining a high transmission rate to a large number of users using a wide frequency band. In 3GPP, this is used under the name NR, and in the present invention, it will be referred to as an NR system.

<LTE 시스템에서의 PRS (Positioning Reference Signal)><PRS (Positioning Reference Signal) in LTE system>

Positioning may mean determining a geographic location and/or speed of a UE by measuring a radio signal. The location information may be requested by a client (eg, an application) related to the UE and reported to the client. In addition, the location information may be included in a core network or may be requested by a client connected to the core network. The location information may be reported in a standard format such as cell-based or geographic coordinates, and in this case, an estimation error value for the location and speed of the UE and/or a positioning method used for positioning may be reported together. I can.

For this positioning, PRS (Positioning Reference Signal) can be used. PRS is a reference signal used for location estimation of the UE. For example, in the LTE system, the PRS may be transmitted only in a downlink subframe (hereinafter, referred to as'Positioning Subframe') configured for PRS transmission. In addition, if both the MBSFN (Multimedia broadcast single frequency network) subframe and the non-MBSFN subframe are set as a positioning subframe, the Orthogonal Frequency Division Multiplexing (OFDM) symbols of the MBSFN subframe are the same as subframe #0 CP ( Cyclic Prefix). If the positioning subframe in the cell is set to only MBSFM subframes, OFDM symbols set for the PRS in the MBSFN subframe may have an extended CP.

The sequence of this PRS may be defined by [Equation 1] below.

[수학식 1][Equation 1]

Here, n_s denotes a slot number within a radio frame, and l denotes an OFDM symbol number within the slot.

Is the largest value among downlink bandwidth settings,

It is expressed as an integer multiple of

Is the size of a resource block (RB) in the frequency domain, and may be composed of, for example, 12 subcarriers.

c(i) is a Pseudo-Random sequence and may be initialized according to [Equation 2] below.

[수학식 2][Equation 2]

Unless otherwise set in the upper layer,

Is

It is the same as and N_cp is 1 in the general CP (Cyclic Prefix) and 0 in the extended CP.

3 shows an example of a pattern in which a PRS is mapped in a subframe. As shown in FIG. 3, the PRS may be transmitted through antenna port 6. FIG. 3(a) shows an example in which a PRS is mapped in a general CP, and FIG. 3(b) shows an example in which a PRS is mapped in an extended CP.

On the other hand, in the LTE system, the PRS may be transmitted in consecutive subframes grouped for position estimation. In this case, the grouped subframes for position estimation are referred to as Positioning Occasion. This positioning opportunity may consist of 1, 2, 4 or 6 subframes. In addition, such a positioning opportunity may occur periodically in a period of 160, 320, 640, or 1280 subframes. In addition, a cell-specific subframe offset value for indicating a start subframe of PRS transmission may be defined, and the offset value and a period of a positioning opportunity for PRS transmission are as shown in Table 1 below, and a PRS configuration index ( Configuration Index).

Meanwhile, the PRS included in each positioning opportunity is transmitted with a constant power. In this case, a PRS may be transmitted with zero power at a specific positioning opportunity, which is referred to as PRS muting. For example, by muting the PRS transmitted from the serving cell, the UE can easily detect the PRS of the adjacent cell.

The PRS muting configuration for the cell may be defined by a periodic muting sequence consisting of 2, 4, 8 or 16 positioning opportunities. That is, the periodic muting sequence may be composed of 2, 4, 8, or 16 bits according to positioning opportunities corresponding to the PRS muting setting, and each bit may have a value of '0' or '1'. For example, PRS muting may be performed at a positioning opportunity in which the bit value is '0'.

Meanwhile, since the positioning subframe is designed as a low interference subframe, data is not transmitted in the positioning subframe. Therefore, although the PRS may be interfered by the PRS of another cell, it is not interfered by data transmission.

<NR 시스템에서의 UE 포지셔닝 아키텍처 (UE Positioning Architecture)><UE Positioning Architecture in NR System>

4 shows an architecture in a 5G system capable of positioning a UE connected to a Next Generation-Radio Access Network (NG-RAN) or E-UTRAN.

4, AMF (Core Access and Mobility Management Function) receives a request for a location service related to a specific target UE from another entity such as GMLC (Gateway Mobile Location Center), or a specific target in the AMF itself It may decide to start location services on behalf of the UE. Then, the AMF transmits a location service request to the LMF (Location Management Function). Upon receiving the location service request, the LMF may process the location service request and return a processing result including the estimated location of the UE to the AMF. Meanwhile, when the location service request is received from another entity such as GMLC other than the AMF, the AMF may transmit the processing result received from the LMF to another entity.

ng-eNB (new generation evolved-NB) and gNB are network elements of NG-RAN that can provide measurement results for location estimation, and can measure radio signals for target UEs and deliver the results to LMF. . In addition, the ng-eNB may control several TPs (transmission points) such as remote radio heads or PRS-only TPs supporting a PRS-based beacon system for E-UTRA.

The LMF is connected to the E-SMLC (Enhanced Serving Mobile Location Center), and the E-SMLC may enable the LMF to access the E-UTRAN. For example, E-SMLC is OTDOA, one of the E-UTRAN positioning methods using downlink measurement obtained by the target UE through signals transmitted from the eNB and/or PRS-only TPs in the E-UTRAN by the LMF. (Observed Time Difference Of Arrival) can be supported.

Meanwhile, the LMF may be connected to the SLP (SUPL Location Platform). The LMF can support and manage different location services for target UEs. The LMF may interact with a serving ng-eNB or a serving gNB for a target UE in order to obtain a location measurement of the UE. For positioning of the target UE, the LMF uses a location service (LCS) client type, a required QoS (Quality of Service), a UE positioning capabilities, a gNB positioning capability, and a ng-eNB positioning capability. Determine and apply this positioning method to the serving gNB and/or serving ng-eNB. In addition, the LMF may determine a location estimate for the target UE and additional information such as location estimation and speed accuracy. SLP is a Secure User Plane Location (SUPL) entity that is responsible for positioning through a user plane.

The UE can measure downlink signals through sources such as NG-RAN and E-UTRAN, different GNSS (Global Navigation Satellite System), TBS (Terrestrial Beacon System), WLAN access point, Bluetooth beacon, and UE barometric pressure sensor. I can. The UE may include an LCS application, and may access the LCS application through communication with a network to which the UE is connected or other applications included in the UE. The LCS application may include the measurement and calculation functions required to determine the location of the UE. For example, the UE may include an independent positioning function such as a Global Positioning System (GPS), and may report the location of the UE independently of NG-RAN transmission. Such independently obtained positioning information may be used as auxiliary information of positioning information obtained from a network.

<UE의 위치 측정을 위한 동작><Operation to measure the location of the UE>

5 shows an example implementation of a network for measuring the location of a UE. When the UE is in CM-IDLE (Connection Management-IDLE) state, when the AMF receives a location service request, the AMF establishes a signaling connection with the UE and provides a network trigger service to allocate a specific serving gNB or ng-eNB. Can be requested. This operation process is omitted in FIG. 5. That is, in FIG. 5, it may be assumed that the UE is in a connected mode. However, for reasons such as signaling and data inactivity, the signaling connection may be released by the NG-RAN while the positioning process is in progress.

Referring to FIG. 5, a detailed operation of the network for measuring the location of the UE is described in step 1a. In step 1a, a 5GC entity such as GMLC may request a location service for measuring the location of the target UE with a serving AMF. However, even if GMLC does not request the location service, according to step 1b, the serving AMF may determine that the location service for measuring the location of the target UE is required. For example, in order to measure the location of the UE for an emergency call, the serving AMF may directly determine to perform location service.

Thereafter, the AMF transmits a location service request to the LMF according to step 2, and according to step 3a, the LMF serves location procedures for obtaining location measurement data or location measurement assistance data ng-eNB, You can start with serving gNB. For example, the LMF may request location-related information related to one or more UEs from the NG-RAN, and may indicate a type of required location information and related QoS. Then, the NG-RAN may transmit location-related information to the LMF to the LMF in response to the request. In this case, when the location determination method according to the request is E-CID, the NG-RAN may transmit additional location-related information to the LMF through one or more NRPPa messages. Here, "location-related information" may mean actual location estimation information and all values used for location calculation, such as wireless measurement or location measurement. In addition, the protocol used in step 3a may be the NRPPa protocol, which will be described later.

Additionally, according to step 3b, the LMF may initiate location procedures for downlink positioning together with the UE. For example, the LMF may transmit location assistance data to the UE or obtain a location estimate or location measurement. For example, in step 3b, a capability transfer process may be performed. Specifically, the LMF may request capability information from the UE, and the UE may transmit capability information to the LMF. At this time, the capability information refers to various aspects of a specific location measurement method, such as information on a location measurement method that can be supported by LFM or UE, and various types of assistance data for A-GNSS. ) And information on common features that are not limited to any one location measurement method, such as the ability to handle multiple LPP transactions, and the like. Meanwhile, in some cases, even if the LMF does not request capability information from the UE, the UE may provide capability information to the LMF.

As another example, an Assistance data transfer process may be performed in step 3b. Specifically, the UE may request location assistance data from the LMF, and may instruct the LMF of specific location assistance data required. Then, the LMF may transmit the location assistance data corresponding thereto to the UE, and additionally, may transmit additional assistance data to the UE through one or more additional LPP messages. On the other hand, the location assistance data transmitted from the LMF to the UE may be transmitted through a unicast method, and in some cases, without the UE requesting the assistance data from the LMF, the LMF provides the location assistance data and/or Alternatively, additional auxiliary data may be transmitted to the UE.

As another example, a location information exchange process may be performed in step 3b. Specifically, the LMF may request the UE for location-related information related to the UE, and may indicate a type of required location information and related QoS. Then, the UE may transmit location-related information to the LMF to the LMF in response to the request. In this case, the UE may additionally transmit additional location-related information to the LMF through one or more LPP messages. Here,'location-related information' may mean all values used for location calculation, such as actual location estimation information and radio measurement or location measurement, and is typically a UE from a plurality of NG-RANs and/or E-UTRANs. There may be a Reference Signal Time Difference (RSTD) value measured by the UE based on downlink reference signals transmitted to the UE. Similar to the above, the UE can transmit the location-related information to the LMF even if there is no request from the LMF.

Meanwhile, the processes performed in step 3b described above may be performed alone, but may be performed continuously. In general, step 3b is performed in the order of a capability transfer process, a location assistance data transfer process, and a location information transfer process, but is not limited to this sequence. In other words, step 3b is independent of any specific order to improve the flexibility of the position measurement. For example, the UE may request location assistance data at any time to perform a location measurement request already requested by the LMF. In addition, if the LMF does not satisfy the QoS required by the location information delivered by the UE, it may request location information such as a location measurement value or a location estimate at any time. Similarly, when the UE does not perform measurement for location estimation, it can transmit capability information to the LMF at any time.

In addition, when an error occurs in information or request exchanged between the LMF and the UE in step 3b, an error message may be transmitted and received, and an Abort message for stopping position measurement may be transmitted and received.

Meanwhile, the protocol used in step 3b may be an LPP protocol, which will be described later.

Meanwhile, step 3b may be additionally performed after step 3a is performed, but may be performed instead of step 3a.

In step 4, the LMF may provide a location service response to the AMF. In addition, the location service response may include information on whether or not location estimation of the UE is successful and an estimate of the location of the UE. Thereafter, if the procedure of FIG. 5 is initiated by step 1a, the AMF may transmit a location service response to a 5GC entity such as GMLC, and if the procedure of FIG. 5 is initiated by step 1b, the AMF is In order to provide a service, a location service response may be used.

<위치 측정을 위한 프로토콜><Protocol for position measurement>

(1) LTE Positioning Protocol (LPP)

6 shows an example of a protocol layer used to support transmission of an LPP message between an LMF and a UE. The LPP PDU may be transmitted through a NAS PDU between the MAF and the UE. 6, the LPP is a target device (e.g., a UE in a control plane or a SET (SUPL Enabled Terminal) in a user plane) and a location server (e.g., LMF in the control plane or SLP in the user plane). ) Can be terminated. The LPP message may be delivered in the form of a transparent PDU through an intermediate network interface using an appropriate protocol such as NGAP through the NG-C interface, LTE-Uu and NAS/RRC through the NR-Uu interface. The LPP protocol enables positioning for NR and LTE using a variety of positioning methods.

For example, through the LPP protocol, the target device and the location server may exchange capability information, auxiliary data for positioning, and/or location information. In addition, error information exchange and/or an instruction to stop the LPP procedure may be performed through the LPP message.

(2) NR Positioning Protocol A (NRPPa)

7 shows an example of a protocol layer used to support NRPPa PDU transmission between an LMF and an NG-RAN node. NRPPa can be used for information exchange between the NG-RAN node and the LMF. Specifically, NRPPa may exchange E-CID for measurement transmitted from ng-eNB to LMF, data to support OTDOA positioning method, Cell-ID and Cell location ID for NR Cell ID positioning method, and the like. The AMF can route NRPPa PDUs based on the routing ID of the associated LMF through the NG-C interface, even if there is no information on the associated NRPPa transaction.

The procedures of the NRPPa protocol for location and data collection can be divided into two types. The first type is a UE associated procedure for delivering information on a specific UE (eg, location measurement information, etc.), and the second type is information applicable to the NG-RAN node and related TPs ( For example, it is a non-UE associated procedure for delivering gNB/ng-eNG/TP timing information, etc.). The above two types of procedures may be supported independently or may be supported simultaneously.

<측위 방법(Positioning Measurement Method)><Positioning Measurement Method>

The positioning methods supported by NG-RAN include GNSS, OTDOA, E-CID (enhanced cell ID), barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning, terrestrial beacon system (TBS), and Uplink Time Difference of Arrival (UTDOA). There may be. Among the above positioning methods, the location of the UE may be measured using any one of the positioning methods, but the location of the UE may be measured using two or more positioning methods.

(1) OTDOA (Observed Time Difference Of Arrival)

8 is a diagram for describing an OTDOA positioning method. The OTDOA positioning method uses the timing of measurement of downlink signals received from a plurality of TPs including an eNB, an ng-eNB and a PRS dedicated TP by the UE. The UE measures the timing of the received downlink signals by using the location assistance data received from the location server. In addition, the location of the UE may be determined based on the measurement result and the geographical coordinates of neighboring TPs.

The UE connected to the gNB may request a measurement gap for OTDOA measurement from the TP. If the UE does not recognize the SFN for at least one TP in the OTDOA assistance data, the UE requests an OTDOA reference cell before requesting a measurement gap for performing RSTD (Reference Signal Time Difference) measurement. An autonomous gap can be used to obtain the SFN of.

Here, the RSTD may be defined based on the smallest relative time difference between the boundaries of the two subframes each received from the reference cell and the measurement cell. That is, it may be calculated based on a relative time difference between the start times of the subframes of the reference cell closest to the start times of the subframes received from the measurement cell. Meanwhile, the reference cell may be selected by the UE.

For accurate OTDOA measurement, it is necessary to measure the time of arrival (TOA) of a signal received from three or more TPs or base stations distributed geographically. For example, measure TOA for each of TP 1, TP 2 and TP 3, and based on the 3 TOA, RSTD for TP 1-TP 2, RSTD for TP 2-TP 3, and TP 3-TP 1 RSTD for RSTD may be calculated, a geometric hyperbola may be determined based on this, and a point at which such hyperbola intersect may be estimated as the location of the UE. At this time, since accuracy and/or uncertainty for each TOA measurement may occur, the estimated UE location may be known as a specific range according to measurement uncertainty.

For example, the RSTD for two TPs may be calculated based on [Equation 3] below.

[수학식 3][Equation 3]

Where c is the speed of light,

Is the (unknown) coordinate of the target UE,

Is the coordinates of the (known) TP,

May be the coordinates of the reference TP (or other TP). here,

Is a transmission time offset between the two TPs, and may be referred to as “Real Time Differences” (RTDs), and n_i and n_1 may indicate values for UE TOA measurement errors.

(2) E-CID (Enhanced Cell ID)

In the cell ID (CID) positioning method, the location of the UE can be measured through geographic information of the serving ng-eNB, serving gNB and/or serving cell of the UE. For example, geographic information of a serving ng-eNB, a serving gNB and/or a serving cell may be obtained through paging, registration, or the like.

Meanwhile, the E-CID positioning method may use additional UE measurement and/or NG-RAN radio resources to improve the UE position estimate in addition to the CID positioning method. In the E-CID positioning method, some of the same measurement methods as the RRC protocol measurement control system may be used, but in general, additional measurements are not performed only for the location measurement of the UE. In other words, in order to measure the location of the UE, a separate measurement configuration or measurement control message may not be provided, and the UE does not expect that an additional measurement operation only for location measurement is requested. , The UE may report a measurement value obtained through generally measurable measurement methods.

For example, the serving gNB may implement the E-CID positioning method using E-UTRA measurements provided from the UE.

*Examples of measurement elements that can be used for E-CID positioning may be as follows.

-UE measurement: E-UTRA RSRP (Reference Signal Received Power), E-UTRA RSRQ (Reference Signal Received Quality), UE E-UTRA Rx-Tx Time difference, GERAN/WLAN RSSI (Reference Signal Strength) Indication), UTRAN CPICH (Common Pilot Channel) RSCP (Received Signal Code Power), UTRAN CPICH Ec/Io

-E-UTRAN measurement: ng-eNB receive-transmit time difference (Rx-Tx Time difference), Timing Advance (T_ADV), Angle of Arrival (AoA)

Here, T_ADV may be classified into Type 1 and Type 2 as follows.

T_ADVType 1 = (ng-eNB receive-transmit time difference)+(UE E-UTRA receive-transmit time difference)

T_ADVType 2 = ng-eNB receive-transmit time difference

Meanwhile, AoA can be used to measure the direction of the UE. AoA may be defined as an estimated angle for the location of the UE in a counterclockwise direction from the base station/TP. In this case, the geographical reference direction may be north. The base station/TP may use an uplink signal such as a sounding reference signal (SRS) and/or a demodulation reference signal (DMRS) for AoA measurement. Further, the larger the array of antenna arrays, the higher the measurement accuracy of AoA. When the antenna arrays are arranged at equal intervals, signals received from adjacent antenna elements may have a constant phase-rotate phase.

(3) UTDOA (Uplink Time Difference of Arrival)

UTDOA is a method of determining the location of the UE by estimating the arrival time of the SRS. When calculating the estimated SRS arrival time, the serving cell is used as a reference cell, and the location of the UE may be estimated through the difference in the arrival time from another cell (or base station/TP). In order to implement UTDOA, the E-SMLC may indicate a serving cell of the target UE in order to indicate SRS transmission to the target UE. In addition, the E-SMLC may provide configurations such as periodic/aperiodic SRS, bandwidth and frequency/group/sequence hopping.

(4) Multi RTT (Multi-cell RTT)

Unlike OTDOA, which requires good (fine) synchronization (e.g., nano-second level) between TPs in the network, RTT is based on TOA measurements, like OTDOA, but coarse TRP (e.g. , Base station) Only timing synchronization is required.

Referring to FIG. 9(a), an RTT process is illustrated in which TOA measurement is performed in an initiating device and a responding device, and the responding device provides TOA measurement to an initiating device for RTT measurement (calculation). For example, the initiating device may be a TRP and/or a terminal, and the responding device may be a terminal and/or a TRP.

In operation 901 according to an exemplary embodiment, the initiating device transmits an RTT measurement request, and the responding device may receive it.

In operation 903 according to an exemplary embodiment, the initiating device may transmit the RTT measurement signal at t0, and the responding device may acquire the TOA measurement t1.

In operation 905 according to the exemplary embodiment, the responding device may transmit the RTT measurement signal at t2, and the initiating device may acquire the TOA measurement t3.

In operation 907 according to an exemplary embodiment, the responding device may transmit information on [t2-t1], and the initiating device may receive the information and calculate the RTT based on Equation 4 below. The information may be transmitted/received based on a separate signal, or included in the RTT measurement signal of 905 to be transmitted/received.

[수학식 4][Equation 4]

Referring to FIG. 9(b), the RTT may correspond to a double-range measurement between two devices. Positioning estimation may be performed from the corresponding information, and a multilateration technique may be used. Based on the measured RTT, d1, d2, d3 can be determined, and the target device location can be determined as the intersection point of the circumference centered on each BS1, BS2, BS3 (or TRP) and each d1, d2, d3 as the radius. have.

Prior to the detailed description, an example of an operation implementation of a terminal and a network node according to an embodiment of the present disclosure will be described with reference to FIGS. 10 to 11.

10 is a diagram illustrating an example of an operation implementation of a terminal according to the present disclosure. Referring to FIG. 10, the terminal may receive information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set (S1001). Thereafter, the terminal may determine a transmission beam used for transmission of the PRS through the plurality of PRS resources based on the information on the PRS resource set (S1003), and based on the determination on the transmission beam Thus, the PRS may be received through the plurality of PRS resources (S1005). In this case, a specific method for the UE of S1001 to S1005 to receive the PRS may be based on embodiments and features described later.

Meanwhile, the terminal of FIG. 10 may be any one of various wireless devices disclosed in FIGS. 13 to 16. For example, the terminal of FIG. 10 may be the first wireless device 100 of FIG. 13 or the

wireless devices

100 and 200 of FIG. 14. In other words, the operation process of FIG. 10 may be performed and executed by any one of various wireless devices disclosed in FIGS. 13 to 16.

11 is a diagram illustrating an example of an operation implementation of a network node according to the present disclosure. Referring to FIG. 11, a network node may transmit information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set (S1101). Thereafter, the PRS may be transmitted through the plurality of PRS resources (S1103). In this case, a specific method of transmitting the PRS by the network nodes of S1101 to S1103 may be based on embodiments and features described later.

Meanwhile, the network node of FIG. 11 may be any one of various wireless devices disclosed in FIGS. 13 to 16. For example, the network node of FIG. 11 may be the second wireless device 200 of FIG. 13 or the

wireless devices

100 and 200 of FIG. 14. In other words, the operation process of FIG. 11 may be performed and executed by any one of various wireless devices disclosed in FIGS. 13 to 16.

Now, a transmission beam used for transmission based on whether path loss is measured by receiving information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set. In the steps of determining (transmission beam) (S1101 to S1103, S1201), a detailed embodiment of an effective configuration method for information related to PRS resources provided to a terminal and/or information for each cell will be described.

PRS 자원 정보와 셀 정보의 독립적인 설정의 고려Consideration of independent configuration of PRS resource information and cell information

In the 3GPP TS 36.355 standard, it can be seen that the PRS of LTE is set as the PRS-INFO parameter according to the LTE Positioning Protocol (LPP). In particular, in the case of LTE, a single PRS configuration corresponding to a single common beam is made without the concept of multiple analog beams, and the PRS-INFO parameter is a reference cell and a neighboring cell. cell) is transmitted as a lower/lower/subordinate parameter.

Meanwhile, in the case of NR (New RAT), multiple transmission beams can be used in one cell/base station/TP (transmission point, or TRP (transmission and reception point)), through which each cell/base station/TP multiple) PRS resource(s) and a plurality of PRS resource set(s) may be transmitted to the terminal. For reference, OTDOA-ReferenceCellInfo and NeighbourCellInfoElement for PRS-INFO, the reference cell and the neighboring cell setting mentioned here is written to that provide information necessary for the terminal location in the terminal location server (location server) is defined in 3GPP TS 36.355 It is part of the "assistance data".

In this case, NR is also a sub/lower/subordinate parameter for each reference cell/base station/TP and/or adjacent cell/base station/TP by using a plurality of PRS resource(s) and a plurality of PRS resource set(s) as in the LTE system. When set or indicated as, each cell/base station/TP uses a plurality of independent PRS resource(s) and a plurality of PRS resource set(s), which will excessively increase the inefficiency of PRS resource utilization and signaling overhead. I can. For example, if PRS configuration is included in the reference cell and/or adjacent cell configuration, information on the same PRS resource(s) is duplicated for each cell when specific PRS resource(s) are used repeatedly in each cell/base station/TP. There may be a problem that needs to be signaled. To solve this problem, it is considered that the information on the PRS resource(s) and the PRS resource set(s) is treated separately from the information on each reference cell/base station/TP and/or neighboring cell/base station/TP. I can.

As described above, even in the NR system, settings for PRS resource(s) and PRS resource set(s) may be included as part of information or data provided by the location server to the UE for location measurement of the UE. That is, as part of "assistance data" defined in 3GPP TS 36.355, configuration information for PRS resource(s) and PRS resource set(s) may be included, in which case each reference cell/base station/TP and/or adjacent cell Information on /base station/TP may also be included as part of assistance data". However, here, the configuration information on the PRS resource(s) and PRS resource set(s) is the reference cell/base station/TP and/or adjacent cell. It is not included in the information on the /base station/TP, but may be independently set as information separate from the information on the reference cell/base station/TP and/or the neighboring cell/base station/TP In addition, the base station or the location server, Information on which cell/base station/TP is transmitted or used in each of the configured PRS resource(s) and PRS resource set(s) may be transmitted, configured, or indicated to the terminal.

In order for the base station or the location server to transmit, set or indicate information on which cell/base station/TP is transmitted or used in each of the configured PRS resource(s) and PRS resource set(s), each PRS resource ( S) and information on the PRS resource set(s) and information on the cell/base station/TP may be configured or instructed to be connected or mapped. Specifically, the index(s) of the PRS resource(s) or the index(s) of the PRS resource set(s) and the TP ID(s) or TP index(s) may be connected or mapped, and the terminal Information on the mapping may be received from the base station or the location server. The information on the connection or mapping may consist of a specific RS resource index(s) and/or RS resource set index(s) and an ID(s) or index(s) of a specific cell/base station/TP, and an additional " Assistance data" may be indicated or set from the location server to the terminal. As a simple example, assuming that PRS resource #1 is used in TP#1 and TP#2, information about connection or mapping such as PRS resource #1:TP #1, TP#2 may be transmitted to the terminal. Alternatively, as another example, TP ID(s)/index(s) corresponding to each PRS resource(s) and/or PRS resource set(s) may be transmitted to the terminal in the form of a table.

Or, on the contrary, information on which cell/base station/TP each PRS resource(s) and/or PRS resource set(s) is transmitted or used in is a reference cell configuration and/or a neighbor cell configuration ( neighboring cell configuration), and may be indicated or set to the terminal. That is, information on the PRS resource(s) and/or the PRS resource set(s) transmitted from the reference cell or from the neighbor cell may be included in the reference cell setting or the neighbor cell setting. As a simple example, the reference cell configuration received by the UE includes the ID(s)/index(s) of the PRS resource(s) or the ID(s)/index(s) of the PRS resource set(s) to indicate to the UE Or can be set.

PRS 자원에 대한 빔(beam) 설정Beam setting for PRS resources

On the other hand, in the UE positioning supported by the NR system, a specific cell/base station/TP can maintain a constant transmission (Tx) beam over several PRS resource(s), and the UE can maintain its own reception (Rx) beam. It supports to change for different PRS resource(s). Through this, the UE can find an optimal Rx beam for a specific Tx beam used by the cell/base station/TP. In addition, in the terminal positioning supported by the NR system, when a specific cell/base station/TP transmits multiple PRS resource(s), it is also supported that the Tx beam is changed for each PRS resource and the terminal receives the PRS with a constant Rx beam. do. Through this, the base station can find an optimal Tx beam for a specific Rx beam used by the terminal.

At this time, in order to support Rx beam sweeping and/or Rx beam maintenance of the terminal as described above, as one of the configuration parameters of the PRS resource set, such as a Channel State Information-Reference Signal (CSI-RS), You may consider introducing a "reception" parameter. The " reception " parameter may be set to On or Off, and the PRS resource set set to reception = On uses the same cell/base station/TP for a plurality of PRS resources included in the corresponding PRS resource set. It may mean transmitting a PRS. That is, it may be understood that the UE performs an Rx beam sweeping operation to set or instruct to find an appropriate Rx beam for PRS resources. On the other hand, the PRS resource set set to reception = Off may mean that a cell/base station/TP transmits a PRS using different Tx beams for a plurality of PRS resources included in the corresponding PRS resource set. That is, it may be understood that the UE uses a specific Rx beam to configure or instruct the cell/base station/TP to find an appropriate Tx beam.

Additionally, in addition to the above method, other methods for setting or indicating to the terminal whether one or more PRS resource(s) are transmitted in the same Tx beam or different Tx beams may be considered.

1) For example, the UE may be indicated or set PRS resource information indicating which specific PRS resource(s) among all PRS resource(s) set from the base station/location server/LMF are transmitted through the same Tx beam. . Here, the corresponding PRS resource information may include ID(s)/index(s) of the PRS resource(s), and the terminal may request such information from the base station or the location server.

Or as another example, for a specific PRS resource set, it is determined whether the cell/base station/TP will use the same or different Tx beams for the PRS resource(s) included in the PRS resource set between the UE and the base station/location server. It can be promised to indicate as an index of a specific PRS resource set. Specifically, the UE expects, assumes, or recognizes that all cells/base stations/TPs transmit PRSs in the same Tx beam for PRS resource(s) belonging to PRS resource set #K (K>=0), or the UE For the PRS resource(s) belonging to the PRS resource set #L (L>=0), the cell/base station/TP can all expect, assume or recognize that PRS is transmitted through different Tx beams, and in such a situation, the PRS resource Set #K may be indicated or set to the terminal. Although the indexes of the PRS resource set between the terminals are the same, the above method may be useful considering that the PRS resource(s) included in the PRS resource set can be freely set in the terminal by the base station or the location server.

Alternatively, the terminal may be instructed or configured with set information for a series of PRS resource(s) or group information for a series of PRS resource(s) from a base station or a location server. At this time, the series of PRS resource(s) is a resource that the UE must receive in a specific Rx beam, and the set of the series of PRS resource(s) or the group of the series of PRS resource(s) is a specific single cell/ Includes all PRS resource(s) transmitted from a plurality of cells/base stations/TPs as well as a base station/TP, and may correspond to a resource(s) that utilizes time/frequency resources orthogonally. . Such a set for a series of PRS resource(s) or a group for a series of PRS resource(s) may be defined, set, or indicated as a PRS block.

2) As described above, the PRS on the NR system needs to indicate or set the PRS resource(s) and/or the PRS resource set(s) in order to support the Rx beam sweeping operation of the UE, and the Rx beam sweeping operation of the UE is specific. It is interlocked with the Tx beam sweeping operation of the cell/base station/TP. Therefore, unlike the LTE system, in the NR system, the location server may set PRS resource(s) and/or PRS resource set(s) to the terminal, but the base station also has PRS resource(s) and/or PRS resource set(s) to the terminal. ) Can be set.

At this time, even if the terminal has received the configuration for the PRS resource (s) and / or PRS resource set (s) from the location server / LMF, the configuration for the PRS resource (s) and / or PRS resource set (s) from the base station If received, the settings received from the location server/LMF can be ignored and the settings received from the base station can be followed. That is, the setting of the PRS resource(s) and/or the PRS resource set(s) received from the base station has priority over the setting of the PRS resource(s) and/or the PRS resource set(s) received from the location server/LMF. You can judge that the ranking is high. For example, in order to configure a transmission/reception beam between a specific TP and a terminal, it may be necessary to change or additionally configure the PRS resource(s) and/or the PRS resource set(s). In this case, the location server/LMF If information about such a setting is received from the and the base station, the setting information received from the base station may be determined as a priority.

In addition, even if the terminal receives the configuration for the PRS resource (s) and / or PRS resource set (s) from the location server / LMF, in relation to each PRS resource (s) and / or PRS resource set (s), a specific cell / base station / Additional configuration related to Tx beam sweeping of the TP may be received from the base station, and the terminal may be configured to expect or assume this.

PRS 자원에 대한 뉴머롤로지(numerology) 설정Setting numerology for PRS resources

Meanwhile, there is a need to indicate the numerology of the PRS resource(s) and/or the PRS resource set(s) to the UE. In this case, the neurology of the PRS resource(s) and/or the PRS resource set(s) may be determined according to the setting of the serving cell and/or the neighboring cell indicated by linking or connecting the PRS resource. In other words, even with the same PRS resource, different neurology can be set or indicated to the terminal, and through this, the burden and overhead of setting or allocating independent PRS resources because the neurology is different in using the same time/frequency resource are avoided. I can reduce it.

Although not limited thereto, various descriptions, functions, procedures, proposals, methods, and/or operational flow charts of the present invention disclosed in this document may be applied to various fields requiring wireless communication/connection (eg, 5G) between devices. have.

Hereinafter, it will be illustrated in more detail with reference to the drawings. In the following drawings/description, the same reference numerals may exemplify the same or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise indicated.

12 illustrates a communication system 1 applied to the present invention.

Referring to FIG. 12, a communication system 1 applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device. Although not limited thereto, wireless devices include robots 100a, vehicles 100b-1 and 100b-2, eXtended Reality (XR) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400. For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, including HMD (Head-Mounted Device), HUD (Head-Up Display), TV, smartphone, It can be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like. Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), computers (eg, notebook computers, etc.). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors, smart meters, and the like. For example, the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station/network node to another wireless device.

The wireless devices 100a to 100f may be connected to the network 300 through the base station 200. AI (Artificial Intelligence) technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300. The network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network. The wireless devices 100a to 100f may communicate with each other through the base station 200 / network 300, but may perform direct communication (e.g. sidelink communication) without going through the base station / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. V2V (Vehicle to Vehicle)/V2X (Vehicle to Everything) communication). In addition, the IoT device (eg, sensor) may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.

Wireless communication/

connections

150a, 150b, and 150c may be established between the wireless devices 100a to 100f / base station 200 and the base station 200 / base station 200. Here, the wireless communication/connection includes various wireless access such as uplink/downlink communication 150a, sidelink communication 150b (or D2D communication), base station communication 150c (eg relay, Integrated Access Backhaul). This can be achieved through technology (eg 5G NR) Through wireless communication/

connections

150a, 150b, 150c, the wireless device and the base station/wireless device, and the base station and the base station can transmit/receive radio signals to each other. For example, the wireless communication/

connection

150a, 150b, 150c can transmit/receive signals through various physical channels. To this end, based on various proposals of the present invention, for transmission/reception of wireless signals At least some of a process of setting various configuration information, various signal processing processes (eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), resource allocation process, and the like may be performed.

13 illustrates a wireless device applicable to the present invention.

Referring to FIG. 13, the first wireless device 100 and the second wireless device 200 may transmit and receive wireless signals through various wireless access technologies (eg, LTE and NR). Here, {the first wireless device 100, the second wireless device 200} is the {wireless device 100x, the base station 200} and/or {wireless device 100x, wireless device 100x) of FIG. 12 } Can be matched.

The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and/or one or more antennas 108. The processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a radio signal including the first information/signal through the transceiver 106. In addition, the processor 102 may store information obtained from signal processing of the second information/signal in the memory 104 after receiving a radio signal including the second information/signal through the transceiver 106. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may perform some or all of the processes controlled by the processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flow charts disclosed in this document. It can store software code including Here, the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 106 may be coupled with the processor 102 and may transmit and/or receive radio signals through one or more antennas 108. The transceiver 106 may include a transmitter and/or a receiver. The transceiver 106 may be mixed with an RF (Radio Frequency) unit. In the present invention, the wireless device may mean a communication modem/circuit/chip.

Specifically, commands and/or operations that are controlled by the processor 102 of the first wireless device 100 and stored in the memory 104 according to an embodiment of the present invention will be described.

The following operations are described based on the control operation of the processor 102 from the perspective of the processor 102, but may be stored in the memory 104 in software code or the like for performing these operations.

The processor 102 may control the transceiver 106 to receive information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set. In addition, the processor 102 may determine a transmission beam used for transmission of a PRS through the plurality of PRS resources, based on the information on the PRS resource set. Further, the processor 102 may control the transceiver 106 to receive the PRS through the plurality of PRS resources based on the determination on the transmission beam. At this time, the processor 102 controls the transceiver 106 to receive information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set, and Based on the determination, a specific method of controlling the transceiver 106 to receive the PRS through the plurality of PRS resources may be based on the above-described embodiments.

Specifically, commands and/or operations controlled by the processor 202 of the second wireless device 200 according to an embodiment of the present invention and stored in the memory 204 will be described.

The following operations are described based on the control operation of the processor 202 from the perspective of the processor 202, but may be stored in the memory 204, such as software code for performing these operations.

The processor 202 may control the transceiver 206 to transmit information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set. In addition, the processor 202 may control the transceiver 206 to transmit the PRS through the plurality of PRS resources. At this time, the processor 102 controls the transceiver 106 to transmit information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set, and the plurality of PRS resources A specific method of controlling the transceiver 106 to transmit a PRS through the network may be based on the above-described embodiments.

Hereinafter, the hardware elements of the

wireless devices

100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or

more processors

102, 202. For example, one or

more processors

102, 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or

more processors

102, 202 may be configured to generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, functions, procedures, proposals, methods, and/or operational flow charts disclosed in this document. Can be generated. One or

more processors

102, 202 may generate messages, control information, data, or information according to the description, function, procedure, suggestion, method, and/or operational flow chart disclosed herein. At least one processor (102, 202) generates a signal (e.g., a baseband signal) including PDU, SDU, message, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , It may be provided to one or more transceivers (106, 206). One or

more processors

102, 202 may receive signals (e.g., baseband signals) from one or

more transceivers

106, 206, and the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein PDUs, SDUs, messages, control information, data, or information may be obtained according to the parameters.

One or more of the

processors

102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more of the

processors

102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) May be included in one or

more processors

102 and 202. The description, functions, procedures, suggestions, methods, and/or operational flow charts disclosed in this document may be implemented using firmware or software, and firmware or software may be implemented to include modules, procedures, functions, and the like. The description, functions, procedures, proposals, methods and/or operational flow charts disclosed in this document are included in one or

more processors

102, 202, or stored in one or

more memories

104, 204, and are It may be driven by the

above processors

102 and 202. The descriptions, functions, procedures, proposals, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or a set of instructions.

One or

more memories

104 and 204 may be connected to one or

more processors

102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions. One or

more memories

104 and 204 may be composed of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer readable storage medium, and/or combinations thereof. One or

more memories

104 and 204 may be located inside and/or outside of one or

more processors

102 and 202. In addition, one or

more memories

104, 204 may be connected to one or

more processors

102, 202 through various technologies such as wired or wireless connection.

One or

more transceivers

106 and 206 may transmit user data, control information, radio signals/channels, and the like mentioned in the methods and/or operational flow charts of this document to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, radio signals/channels, etc. mentioned in the description, functions, procedures, suggestions, methods and/or operation flow charts disclosed in this document from one or more other devices. have. For example, one or

more transceivers

106 and 206 may be connected to one or

more processors

102 and 202, and may transmit and receive wireless signals. For example, one or

more processors

102, 202 may control one or

more transceivers

106, 206 to transmit user data, control information, or radio signals to one or more other devices. In addition, one or

more processors

102, 202 may control one or

more transceivers

106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers (106, 206) may be connected with one or more antennas (108, 208), and one or more transceivers (106, 206) through one or more antennas (108, 208), the description and functionality disclosed in this document. It may be set to transmit and receive user data, control information, radio signals/channels, and the like mentioned in a procedure, a proposal, a method, and/or an operation flowchart. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). One or more transceivers (106, 206) in order to process the received user data, control information, radio signal / channel, etc. using one or more processors (102, 202), the received radio signal / channel, etc. in the RF band signal. It can be converted into a baseband signal. One or

more transceivers

106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or

more processors

102 and 202 from a baseband signal to an RF band signal. To this end, one or more of the

transceivers

106 and 206 may include (analog) oscillators and/or filters.

14 shows another example of a wireless device applied to the present invention. The wireless device may be implemented in various forms according to use-examples/services (see FIG. 12).

Referring to FIG. 14, the

wireless devices

100 and 200 correspond to the

wireless devices

100 and 200 of FIG. 13, and various elements, components, units/units, and/or modules ) Can be composed of. For example, the

wireless devices

100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit may include a communication circuit 112 and a transceiver(s) 114. For example, the communication circuit 112 may include one or

more processors

102 and 202 and/or one or

more memories

104 and 204 of FIG. 13. For example, the transceiver(s) 114 may include one or more transceivers 106,206 and/or one or more antennas 108,208 of FIG. 13. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls all operations of the wireless device. For example, the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130. In addition, the control unit 120 transmits the information stored in the memory unit 130 to an external (eg, other communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130. Accordingly, the specific operation process of the control unit 120 and the program/code/command/information stored in the memory unit 130 according to the present invention are at least one of the

processors

102 and 202 of FIG. 13 and the memory 104 and 204. ) May correspond to at least one operation.

The additional element 140 may be variously configured according to the type of wireless device. For example, the additional element 140 may include at least one of a power unit/battery, an I/O unit, a driving unit, and a computing unit. Although not limited thereto, wireless devices include robots (Figs. 12, 100a), vehicles (Figs. 12, 100b-1, 100b-2), XR devices (Figs. 12, 100c), portable devices (Figs. 12, 100d), and home appliances. (Figs.12, 100e), IoT devices (Figs. 12, 100f), digital broadcasting terminals, hologram devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate/environment devices, It may be implemented in the form of an AI server/device (FIGS. 12 and 400), a base station (FIGS. 12 and 200), and a network node. The wireless device can be used in a mobile or fixed location depending on the use-example/service.

In FIG. 14, various elements, components, units/units, and/or modules in the

wireless devices

100 and 200 may be entirely interconnected through a wired interface, or at least some may be wirelessly connected through the communication unit 110. For example, in the

wireless devices

100 and 200, the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130, 140) are connected through the communication unit 110. Can be connected wirelessly. In addition, each element, component, unit/unit, and/or module in the

wireless device

100 and 200 may further include one or more elements. For example, the controller 120 may be configured with one or more processor sets. For example, the control unit 120 may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, and a memory control processor. As another example, the memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.

Hereinafter, an implementation example of FIG. 14 will be described in more detail with reference to the drawings.

15 illustrates a portable device applied to the present invention. Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), and portable computers (eg, notebook computers). The portable device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).

Referring to FIG. 15, the portable device 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input/output unit 140c. ) Can be included. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 to 130/140a to 140c correspond to blocks 110 to 130/140 of FIG. 14, respectively.

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations. The controller 120 may perform various operations by controlling components of the portable device 100. The controller 120 may include an application processor (AP). The memory unit 130 may store data/parameters/programs/codes/commands required for driving the portable device 100. Also, the memory unit 130 may store input/output data/information, and the like. The power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like. The interface unit 140b may support connection between the portable device 100 and other external devices. The interface unit 140b may include various ports (eg, audio input/output ports, video input/output ports) for connection with external devices. The input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user. The input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.

For example, in the case of data communication, the input/output unit 140c acquires information/signals (eg, touch, text, voice, image, video) input from the user, and the obtained information/signals are stored in the memory unit 130. Can be saved. The communication unit 110 may convert information/signals stored in the memory into wireless signals, and may directly transmit the converted wireless signals to other wireless devices or to a base station. In addition, after receiving a radio signal from another radio device or a base station, the communication unit 110 may restore the received radio signal to the original information/signal. After the restored information/signal is stored in the memory unit 130, it may be output in various forms (eg, text, voice, image, video, heptic) through the input/output unit 140c.

16 illustrates a vehicle or an autonomous driving vehicle applied to the present invention. The vehicle or autonomous vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), or a ship.

Referring to FIG. 16, the vehicle or autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and autonomous driving. It may include a unit (140d). The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110/130/140a to 140d correspond to blocks 110/130/140 of FIG. 14, respectively.

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, base stations (e.g. base stations, roadside base stations, etc.), and servers. The controller 120 may perform various operations by controlling elements of the vehicle or the autonomous vehicle 100. The control unit 120 may include an Electronic Control Unit (ECU). The driving unit 140a may cause the vehicle or the autonomous vehicle 100 to travel on the ground. The driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like. The power supply unit 140b supplies power to the vehicle or the autonomous vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like. The sensor unit 140c is an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, and a vehicle advancement. /Reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illumination sensor, pedal position sensor, etc. may be included. The autonomous driving unit 140d is a technology for maintaining a driving lane, a technology for automatically adjusting the speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and for driving by automatically setting a route when a destination is set. Technology, etc. can be implemented.

For example, the communication unit 110 may receive map data and traffic information data from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data. The controller 120 may control the driving unit 140a so that the vehicle or the autonomous driving vehicle 100 moves along the autonomous driving path according to the driving plan (eg, speed/direction adjustment). During autonomous driving, the communication unit 110 asynchronously/periodically acquires the latest traffic information data from an external server, and may acquire surrounding traffic information data from surrounding vehicles. In addition, during autonomous driving, the sensor unit 140c may acquire vehicle state and surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and the driving plan based on newly acquired data/information. The communication unit 110 may transmit information about a vehicle location, an autonomous driving route, and a driving plan to an external server. The external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomously driving vehicles, and may provide the predicted traffic information data to the vehicle or autonomously driving vehicles.

Meanwhile, in order to perform the embodiments according to the present invention, a location server 90 as shown in FIG. 17 may be included. Here, the location server 90 may be logically or physically connected to the wireless device 70 and/or the network node 80. Meanwhile, the wireless device 70 may be the first wireless device 100 of FIG. 13 and/or the

wireless devices

100 and 200 of FIG. 14. Also, the network node 80 may be the second wireless device 100 of FIG. 13 and/or the

wireless devices

100 and 200 of FIG. 14.

Meanwhile, the location server 90 may be AMF, LMF, E-SMLC and/or SLP, but is not limited thereto, and may serve as the location server 90 in order to implement the embodiment of the present invention. If it is a communication device, any communication device may be utilized as the location server 90. In particular, the name of the location server 90 is used for convenience of description, but may not be implemented in a server form, and may be implemented in a chip form, and such a chip form is implemented. May be implemented to perform all the functions of the location server 90 to be described later.

Specifically referring to the location server 90, the location server 90 includes a transceiver 91 for communicating with one or more other wireless devices, network nodes, and/or other elements of the network. In this case, the transceiver 91 may include one or more communication interfaces. It communicates with one or more other wireless devices, network nodes, and/or other elements of the network connected through the communication interface.

Also, the location server 90 includes a processing chip 92. The processing chip 92 may include at least one processor such as the processor 93 and at least one memory device such as the memory 94.

The processing chip 92 may control one or more processes in order to implement the methods described herein, and/or embodiments for a problem to be solved herein and a solution thereto. In other words, the processing chip 92 may be configured to perform at least one or more embodiments described herein. That is, the processor 93 includes at least one processor for performing the function of the location server 90 described herein. For example, one or more processors may transmit and receive information by controlling one or more transceivers 91 of FIG. 17.

Further, the processing chip 92 includes a memory 94 configured to store data, programmable software code, and/or other information for performing the embodiments described herein.

In other words, in the embodiment according to the present specification, when the memory 94 is executed by at least one processor such as the processor 93, the processor 93 is controlled by the processor 93 of FIG. It stores software code 95 including instructions for performing some or all of the processes to be performed, or for performing the embodiments described herein.

The embodiments described above are those in which components and features of the present invention are combined in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, it is also possible to construct an embodiment of the present invention by combining some components and/or features. The order of operations described in the embodiments of the present invention may be changed. Some configurations or features of one embodiment may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is apparent that claims that do not have an explicit citation relationship in the claims may be combined to constitute an embodiment or may be included as a new claim by amendment after filing.

Here, the wireless communication technology implemented in the wireless device of the present specification may include LTE, NR, and 6G, as well as NB-IoT (Narrowband Internet of Things) for low power communication. At this time, for example, the NB-IoT technology may be an example of a Low Power Wide Area Network (LPWAN) technology, and may be implemented in a standard such as LTE Cat (Category) NB1 and/or LTE Cat NB2. It is not limited. Additionally or alternatively, the wireless communication technology implemented in the wireless device of the present specification may perform communication based on the LTE-M technology. In this case, as an example, the LTE-M technology may be an example of an LPWAN technology, and may be referred to as various names such as eMTC (enhanced machine type communication). For example, LTE-M technology is 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-Bandwidth Limited (BL), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) may be implemented in at least one of various standards such as LTE M, and is not limited to the above name. Additionally or alternatively, the wireless communication technology implemented in the wireless device of the present specification includes at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low power communication. It can be, and is not limited to the above-described name. As an example, ZigBee technology can generate personal area networks (PANs) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and may be called various names.

A specific operation described as being performed by a base station in this document may be performed by its upper node in some cases. That is, it is obvious that various operations performed for communication with a terminal in a network comprising a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station. The base station may be replaced by terms such as a fixed station, gNode B (gNB), Node B, eNode B (eNB), and access point.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the features of the present invention. Therefore, the detailed description above should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

A method for receiving a Positioning Reference Signal (PRS) and an apparatus therefor have been described mainly in an example applied to the 5th generation NewRAT system, but it can be applied to various wireless communication systems in addition to the 5th generation NewRAT system.

Claims

In a method for a terminal to receive a positioning reference signal (PRS) in a wireless communication system,

Receiving information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set,

Based on the information on the PRS resource set, determine a transmission beam used for transmission of the PRS through the plurality of PRS resources,

Based on the determination on the transmission beam, receiving the PRS through the plurality of PRS resources,

The information on the PRS resource set indicates that the transmission beam is the same for the plurality of PRS resources,

How to receive PRS.
The method of claim 1,

The information on the PRS resource set is an index of the PRS resource set,

How to receive PRS.
The method of claim 1,

The terminal further receives information on the PRS resource set and a cell related to the plurality of PRS resources,

How to receive PRS.
The method of claim 3,

The information on the PRS resource set and information on the plurality of PRS resources are set independently from the information on the cell,

How to receive PRS.
The method of claim 1,

The positioning of the terminal is performed based on the PRS,

How to receive PRS.
In a terminal receiving a positioning reference signal (PRS) in a wireless communication system,

At least one transceiver;

At least one processor; And

At least one memory that is operably connected to the at least one processor and stores instructions for causing the at least one processor to perform a specific operation when executed; and

The specific operation is,

Receiving information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set,

Based on the information on the PRS resource set, determine a transmission beam used for transmission of the PRS through the plurality of PRS resources,

Based on the determination on the transmission beam, receiving the PRS through the plurality of PRS resources,

The information on the PRS resource set indicates that the transmission beam is the same for the plurality of PRS resources,

Terminal.
The method of claim 6,

The information on the PRS resource set is an index of the PRS resource set,

Terminal.
The method of claim 6,

The specific operation comprises further receiving information on the PRS resource set and a cell related to the plurality of PRS resources,

Terminal.
The method of claim 8,

The information on the PRS resource set and information on the plurality of PRS resources are set independently from the information on the cell,

Terminal.
The method of claim 6,

The positioning of the terminal is performed based on the PRS,

Terminal.
In an apparatus for receiving a positioning reference signal (PRS) in a wireless communication system,

At least one transceiver;

At least one processor; And

At least one memory that is operably connected to the at least one processor and stores instructions for causing the at least one processor to perform a specific operation when executed; and

The specific operation is,

Receiving information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set,

Based on the information on the PRS resource set, determine a transmission beam used for transmission of the PRS through the plurality of PRS resources,

Based on the determination on the transmission beam, receiving the PRS through the plurality of PRS resources,

The information on the PRS resource set indicates that the transmission beam is the same for the plurality of PRS resources,

Device.
In a method for transmitting a positioning reference signal (PRS) by a network node in a wireless communication system,

Transmitting information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set,

Transmitting a PRS through the plurality of PRS resources,

The transmission beam used for transmission of the PRS through the plurality of PRS resources is the same,

The information on the PRS resource set indicates that the transmission beam is the same for the plurality of PRS resources,

PRS transmission method.
In a network node transmitting a positioning reference signal (PRS) in a wireless communication system,

At least one transceiver;

At least one processor; And

At least one memory that is operably connected to the at least one processor and stores instructions for causing the at least one processor to perform a specific operation when executed; and

The specific operation is,

Transmitting information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set,

Transmitting a PRS through the plurality of PRS resources,

The transmission beam used for transmission of the PRS through the plurality of PRS resources is the same,

The information on the PRS resource set indicates that the transmission beam is the same for the plurality of PRS resources,

Network node.
A computer-readable storage medium comprising:

The computer-readable storage medium stores at least one computer program including instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a user device, the operations comprising:

Receiving information on a PRS resource set and information on a plurality of PRS resources included in the PRS resource set,

Based on the information on the PRS resource set, determine a transmission beam used for transmission of the PRS through the plurality of PRS resources,

Based on the determination on the transmission beam, receiving the PRS through the plurality of PRS resources,

The information on the PRS resource set indicates that the transmission beam is the same for the plurality of PRS resources,

Computer readable storage media.