WO2023287190A1 - 무선통신시스템에서 사이드링크 리모트 ue의 측위에 관련된 동작 방법 - Google Patents
무선통신시스템에서 사이드링크 리모트 ue의 측위에 관련된 동작 방법 Download PDFInfo
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- H—ELECTRICITY
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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Definitions
- the following description relates to a wireless communication system, and more particularly, to a method and apparatus related to determining a base station for transmitting a PRS based on a remote UE in a sidelink relay and positioning of the remote UE based on the corresponding PRS.
- a wireless communication system is widely deployed to provide various types of communication services such as voice and data.
- a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
- Examples of the multiple access system include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency (SC-FDMA) system.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency
- MC-FDMA division multiple access
- MC-FDMA multi carrier frequency division multiple access
- 5G radio access technologies
- RATs radio access technologies
- LTE Long Term Evolution
- LTE-A Long Term Evolution
- WiFi wireless communication systems
- 5G The three main requirement areas for 5G are (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area, and (3) Hyper-reliability and It includes the Ultra-reliable and Low Latency Communications (URLLC) area.
- eMBB Enhanced Mobile Broadband
- mMTC Massive Machine Type Communication
- URLLC Ultra-reliable and Low Latency Communications
- KPI key performance indicator
- 5G supports these diverse use cases in a flexible and reliable way.
- eMBB goes far beyond basic mobile internet access, and covers rich interactive work, media and entertainment applications in the cloud or augmented reality.
- Data is one of the key drivers of 5G, and we may not see dedicated voice services for the first time in the 5G era.
- voice is expected to be handled as an application simply using the data connection provided by the communication system.
- the main causes for the increased traffic volume are the increase in content size and the 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 users.
- Cloud storage and applications are rapidly growing in mobile communication platforms, which can be applied to both work and entertainment.
- cloud storage is a special use case that drives the growth of uplink data transmission rate.
- 5G is also used for remote work in the cloud, requiring much lower end-to-end latency to maintain a good user experience when tactile interfaces are used.
- Entertainment Cloud gaming and video streaming are another key factor driving the demand for mobile broadband capabilities. Entertainment is essential on smartphones and tablets anywhere including in highly mobile environments such as trains, cars and airplanes.
- Another use case is augmented reality for entertainment and information retrieval.
- augmented reality requires very low latency and instantaneous amount of data.
- URLLC includes new services that will change the industry through ultra-reliable/available low-latency links such as remote control of critical infrastructure and self-driving vehicles. This level of reliability and latency is essential for smart grid control, industrial automation, robotics, and drone control and coordination.
- 5G can complement fiber-to-the-home (FTTH) and cable-based broadband (or DOCSIS) as a means of delivering streams rated at hundreds of megabits per second to gigabits per second. These high speeds are required to deliver TV with resolutions above 4K (6K, 8K and beyond) as well as virtual and augmented reality.
- Virtual Reality (VR) and Augmented Reality (AR) applications include mostly immersive sports competitions. Certain applications may require special network settings. For example, in the case of VR games, game companies may need to integrate their core servers with the network operator's edge network servers to minimize latency.
- Automotive is expected to be an important new driver for 5G, with many use cases for mobile communications on vehicles. For example, entertainment for passengers requires 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 use case in the automotive sector is augmented reality dashboards. It identifies objects in the dark over what the driver sees through the front window, and overlays information that tells the driver about the object's distance and movement.
- wireless modules will enable communication between vehicles, exchange of information between vehicles and supporting infrastructure, and exchange of information between vehicles and other connected devices (eg devices carried by pedestrians).
- a safety system can help reduce the risk of an accident by guiding the driver through alternate courses of action to make driving safer.
- the next step will be remotely controlled or self-driven vehicles. This requires very reliable and 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, leaving drivers to focus only on traffic anomalies that the vehicle itself cannot identify. The technical requirements of self-driving vehicles require ultra-low latency and ultra-high reliability to increase traffic safety to levels that are unattainable by humans.
- Smart cities and smart homes will be embedded with high-density wireless sensor networks.
- a distributed network of intelligent sensors will identify 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 connected wirelessly. Many of these sensors are typically low data rates, low power and low cost.
- real-time HD video for example, may be required in certain types of devices for surveillance.
- a smart grid interconnects these sensors using digital information and communication technologies to gather information and act on it. This information can include supplier and consumer behavior, allowing the smart grid to improve efficiency, reliability, affordability, sustainability of production and distribution of fuels such as electricity in an automated manner.
- 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 may support telemedicine, which provides clinical care at a remote location. This can help reduce barriers to distance and improve access to health services that are not consistently available in remote rural areas. It is also used to save lives in critical care and emergencies.
- a mobile communication based wireless sensor network can 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 in many industries. However, achieving this requires that wireless connections operate with cable-like latency, reliability and capacity, and that their management be simplified. Low latency and very low error probability are the new requirements that need to be connected with 5G.
- Logistics and freight tracking are important use cases for mobile communications that use location-based information systems to enable tracking of inventory and packages from anywhere.
- Logistics and freight tracking use cases typically require low data rates, but wide range and reliable location information.
- a wireless communication system is a multiple access system that supports communication with multiple users by sharing available system resources (eg, bandwidth, transmission power, etc.).
- multiple access systems include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency (SC-FDMA) system.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency
- MC-FDMA division multiple access
- MC-FDMA multi carrier frequency division multiple access
- SL refers to a communication method in which a direct link is established between user equipments (UEs) and voice or data is directly exchanged between the terminals without going through a base station (BS).
- UEs user equipments
- BS base station
- the SL is being considered as a method for solving the burden of the base station due to rapidly increasing data traffic.
- V2X vehicle-to-everything refers to a communication technology that exchanges information with other vehicles, pedestrians, infrastructure-built objects, etc. through wired/wireless communication.
- V2X can be divided into four types: V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure), V2N (vehicle-to-network), and V2P (vehicle-to-pedestrian).
- V2X communication may be provided through a PC5 interface and/or a Uu interface.
- next-generation radio access technology taking into account the above may be referred to as new radio access technology (RAT) or new radio (NR).
- RAT new radio access technology
- NR new radio
- V2X vehicle-to-everything
- FIG. 1 is a diagram for explaining and comparing V2X communication based on RAT before NR and V2X communication based on NR.
- V2X communication RAT prior to NR provides safety services based on V2X messages such as BSM (Basic Safety Message), CAM (Cooperative Awareness Message), and DENM (Decentralized Environmental Notification Message) This has been mainly discussed.
- the V2X message may include location information, dynamic information, attribute information, and the like.
- a UE may transmit a CAM of a periodic message type and/or a DENM of an event triggered message type to another UE.
- the CAM may include basic vehicle information such as vehicle dynamic state information such as direction and speed, vehicle static data such as dimensions, external lighting conditions, and route details.
- the terminal may broadcast CAM, and the latency of CAM may be less than 100 ms.
- a terminal may generate a DENM and transmit it to another terminal.
- all vehicles within the transmission range of the UE can receive CAM and/or DENM.
- DENM may have a higher priority than CAM.
- V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, and the like.
- vehicles can dynamically form groups and move together. For example, to perform platoon operations based on vehicle platooning, vehicles belonging to the group may receive periodic data from the lead vehicle. For example, vehicles belonging to the group may shorten or widen the distance between vehicles using periodic data.
- vehicles can be semi-automated or fully automated.
- each vehicle may adjust trajectories or maneuvers based on data obtained from local sensors of proximate vehicles and/or proximate logical entities.
- each vehicle may mutually share driving intention with nearby vehicles.
- raw data or processed data obtained through local sensors, or live video data may be used for vehicles, logical entities, terminals of pedestrians, and / or may be interchanged between V2X application servers.
- a vehicle can recognize an environment that is more advanced than an environment that can be sensed using its own sensors.
- a remote driver or V2X application may operate or control the remote vehicle.
- a route can be predicted such as in public transportation
- cloud computing-based driving may be used to operate or control the remote vehicle.
- access to a cloud-based back-end service platform can be considered for remote driving.
- Embodiment (s) is a configuration for determining a PRS transmission base station based on a remote UE, and content related to positioning based on the PRS received from the PRS transmission base station as a technical task.
- One embodiment is a method of operating a remote UE in a wireless communication system, wherein the remote UE receives information related to a positioning reference signal (PRS) transmitted by a plurality of base stations; The remote UE receives a plurality of PRSs from at least some of the plurality of base stations; The remote UE measures a Reference Signal Time Difference Measurement (RSTD) of each pair of the plurality of PRSs, and the at least some base stations have the best signal strength among the base stations measured by the remote UE; A method in which the recommended base station of the remote UE is necessarily included.
- PRS positioning reference signal
- RSTD Reference Signal Time Difference Measurement
- the remote UE at least one processor; and at least one computer memory operably coupled to the at least one processor, the computer memory storing instructions which, when executed, cause the at least one processor to perform operations, the operations being transmitted by the plurality of base stations.
- PRS Positioning Reference Signal
- RSTD Reference Signal Time Difference Measurement
- One embodiment is a processor for performing operations for a relay UE in a wireless communication system, wherein the operations include: receiving information related to a positioning reference signal (PRS) transmitted by a plurality of base stations; Receiving a plurality of PRSs from at least some of the plurality of base stations; and measuring a Reference Signal Time Difference Measurement (RSTD) of each pair of the plurality of PRSs, and in the at least some base stations, a base station having the best signal strength among the base stations measured by the remote UE or the remote UE It is a processor that necessarily includes a recommended base station.
- PRS positioning reference signal
- RSTD Reference Signal Time Difference Measurement
- One embodiment is a non-volatile computer readable storage medium storing at least one computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a relay UE,
- the above operations may include receiving information related to a positioning reference signal (PRS) transmitted by a plurality of base stations; Receiving a plurality of PRSs from at least some of the plurality of base stations; and measuring a Reference Signal Time Difference Measurement (RSTD) of each pair of the plurality of PRSs, and in the at least some base stations, a base station having the best signal strength among the base stations measured by the remote UE or the remote UE
- PRS positioning reference signal
- RSTD Reference Signal Time Difference Measurement
- the remote UE may transmit information related to a base station having the best signal strength or a recommended base station of the remote UE to a serving base station.
- the remote UE can necessarily use the PRS of a base station having the best signal strength reported by the remote UE or a recommended base station of the remote UE.
- the remote UE may not perform measurement on the serving cell.
- the remote UE may determine the location of the remote UE based on the measurement result.
- the remote UE may transmit the measurement result to the serving cell and receive information related to the location of the remote UE determined by a Location Management Function (LMF) based on the measurement result.
- LMF Location Management Function
- Information related to the base station having the best signal strength or the recommended base station of the remote UE may be included in an on-demand SIB request transmitted by the remote UE to the serving base station through the relay UE.
- Information related to the PRS transmitted by the plurality of base stations may be included in proSIB.
- the proSIB may include PRS configuration related to the plurality of base stations.
- the proSIB may be transmitted from the serving base station of the relay UE.
- the serving base station of the relay UE may be the same as the serving base station of the remote UE.
- the remote UE may communicate with at least one of another UE, a UE related to an autonomous vehicle, a base station, or a network.
- the remote UE even when the remote UE has a large distance from the serving cell, it is possible to stably and accurately perform positioning.
- FIG. 1 is a diagram for explaining and comparing V2X communication based on RAT before NR and V2X communication based on NR.
- FIG 2 shows the structure of an LTE system according to an embodiment of the present disclosure.
- FIG 3 illustrates a radio protocol architecture for a user plane and a control plane, according to an embodiment of the present disclosure.
- FIG. 4 shows the structure of an NR system according to an embodiment of the present disclosure.
- 5 illustrates functional partitioning between NG-RAN and 5GC according to an embodiment of the present disclosure.
- FIG. 6 shows a structure of a radio frame of NR to which the embodiment(s) can be applied.
- FIG. 7 illustrates a slot structure of an NR frame according to an embodiment of the present disclosure.
- FIG. 8 illustrates a radio protocol architecture for SL communication according to an embodiment of the present disclosure.
- FIG 9 illustrates a radio protocol architecture for SL communication according to an embodiment of the present disclosure.
- FIG. 10 illustrates a procedure for a terminal to perform V2X or SL communication according to a transmission mode according to an embodiment of the present disclosure.
- 11 to 15 are views for explaining the embodiment (s).
- 16 to 22 are views illustrating various devices to which the embodiment(s) may be applied.
- “/” and “,” should be interpreted as indicating “and/or”.
- “A/B” may mean “A and/or B”.
- “A, B” may mean “A and/or B”.
- “A/B/C” may mean “at least one of A, B and/or C”.
- “A, B, C” may mean “at least one of A, B and/or C”.
- “or” should be interpreted as indicating “and/or”.
- “A or B” can include “only A”, “only B”, and/or “both A and B”.
- “or” should be interpreted as indicating "in addition or alternatively.”
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000.
- TDMA may be implemented with a radio technology such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE).
- GSM global system for mobile communications
- GPRS general packet radio service
- EDGE enhanced data rates for GSM evolution
- OFDMA may be implemented with a wireless technology such as institute of electrical and electronics engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), and the like.
- IEEE 802.16m is an evolution of IEEE 802.16e, and provides backward compatibility with a system based on IEEE 802.16e.
- UTRA is part of the universal mobile telecommunications system (UMTS).
- 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) that uses evolved-UMTS terrestrial radio access (E-UTRA), adopting OFDMA in downlink and SC in uplink -Adopt FDMA.
- LTE-A (advanced) is an evolution of 3GPP LTE.
- 5G NR a successor to LTE-A, is a new clean-slate mobile communication system with characteristics such as high performance, low latency, and high availability.
- 5G NR can utilize all available spectrum resources, including low-frequency bands below 1 GHz, medium-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz.
- LTE-A or 5G NR is mainly described, but the technical idea according to an embodiment of the present disclosure is not limited thereto.
- E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
- LTE Long Term Evolution
- the E-UTRAN includes a base station 20 providing a control plane and a user plane to a terminal 10.
- the terminal 10 may be fixed or mobile, and may be referred to by other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), and a wireless device.
- the base station 20 refers to a fixed station that communicates with the terminal 10, and may be called other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an access point.
- eNB evolved-NodeB
- BTS base transceiver system
- Base stations 20 may be connected to each other through an X2 interface.
- the base station 20 is connected to an Evolved Packet Core (EPC) 30 through the S1 interface, and more specifically, to a Mobility Management Entity (MME) through the S1-MME and a Serving Gateway (S-GW) through the S1-U.
- EPC Evolved Packet Core
- MME Mobility Management Entity
- S-GW Serving Gateway
- the EPC 30 is composed of an MME, an S-GW, and a Packet Data Network-Gateway (P-GW).
- the MME has access information of the terminal or information about the capabilities of the terminal, and this information is mainly used for mobility management of the terminal.
- the S-GW is a gateway having E-UTRAN as an endpoint
- the P-GW is a gateway having PDN (Packet Date Network) as an endpoint.
- the layers of the Radio Interface Protocol between the terminal and the network are based on the lower 3 layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems, It can be divided into L2 (second layer) and L3 (third layer).
- OSI Open System Interconnection
- the physical layer belonging to the first layer provides an information transfer service using a physical channel
- the RRC (Radio Resource Control) layer located in the third layer provides radio resources between the terminal and the network. plays a role in controlling To this end, the RRC layer exchanges RRC messages between the terminal and the base station.
- 3(a) shows a radio protocol architecture for a user plane, according to an embodiment of the present disclosure.
- the user plane is a protocol stack for transmitting user data
- the control plane is a protocol stack for transmitting control signals.
- a physical layer provides an information transmission service to an upper layer using a physical channel.
- the physical layer is connected to a medium access control (MAC) layer, which is an upper layer, through a transport channel.
- MAC medium access control
- Data moves between the MAC layer and the physical layer through the transport channel. Transmission channels are classified according to how and with what characteristics data is transmitted through the air interface.
- the physical channel may be modulated using OFDM (Orthogonal Frequency Division Multiplexing) and utilizes time and frequency as radio resources.
- OFDM Orthogonal Frequency Division Multiplexing
- the MAC layer provides a service to a radio link control (RLC) layer, which is an upper layer, through a logical channel.
- RLC radio link control
- the MAC layer provides a mapping function from multiple logical channels to multiple transport channels.
- the MAC layer provides a logical channel multiplexing function by mapping a plurality of logical channels to a single transport channel.
- the MAC sublayer provides data transmission services on logical channels.
- the RLC layer performs concatenation, segmentation, and reassembly of RLC Serving Data Units (SDUs).
- SDUs RLC Serving Data Units
- the RLC layer has transparent mode (TM), unacknowledged mode (UM) and acknowledged mode , AM) provides three operation modes.
- AM RLC provides error correction through automatic repeat request (ARQ).
- the Radio Resource Control (RRC) layer is defined only in the control plane.
- the RRC layer is responsible for control of logical channels, transport channels, and physical channels in relation to configuration, re-configuration, and release of radio bearers.
- RB means a logical path provided by the first layer (physical layer or PHY layer) and the second layer (MAC layer, RLC layer, Packet Data Convergence Protocol (PDCP) layer) for data transfer between the terminal and the network.
- MAC layer physical layer or PHY layer
- RLC layer Packet Data Convergence Protocol (PDCP) layer
- the functions of the PDCP layer in the user plane include delivery of user data, header compression and ciphering.
- the functions of the PDCP layer in the control plane include delivery of control plane data and encryption/integrity protection.
- Establishing an RB means a process of defining characteristics of a radio protocol layer and a channel and setting specific parameters and operation methods to provide a specific service.
- RBs can be further divided into two types: Signaling Radio Bearer (SRB) and Data Radio Bearer (DRB).
- SRB Signaling Radio Bearer
- DRB Data Radio Bearer
- the UE When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC_CONNECTED state, otherwise it is in the RRC_IDLE state.
- the RRC_INACTIVE state is additionally defined, and the UE in the RRC_INACTIVE state can release the connection with the base station while maintaining the connection with the core network.
- a downlink transmission channel for transmitting data from a network to a terminal includes a broadcast channel (BCH) for transmitting system information and a downlink shared channel (SCH) for transmitting user traffic or control messages.
- Traffic or control messages of a downlink multicast or broadcast service may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH).
- an uplink transmission channel for transmitting data from a terminal to a network includes a random access channel (RACH) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or control messages.
- RACH random access channel
- Logical channels located above transport channels and mapped to transport channels include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), MTCH (Multicast Traffic Channel) Channel), etc.
- BCCH Broadcast Control Channel
- PCCH Paging Control Channel
- CCCH Common Control Channel
- MCCH Multicast Control Channel
- MTCH Multicast Traffic Channel
- a physical channel is composed of several OFDM symbols in the time domain and several sub-carriers in the frequency domain.
- One sub-frame is composed of a plurality of OFDM symbols in the time domain.
- a resource block is a resource allocation unit and is composed of a plurality of OFDM symbols and a plurality of sub-carriers.
- each subframe may use specific subcarriers of specific OFDM symbols (eg, a first OFDM symbol) of the corresponding subframe for a Physical Downlink Control Channel (PDCCH), that is, an L1/L2 control channel.
- PDCCH Physical Downlink Control Channel
- TTI Transmission Time Interval
- FIG. 4 shows the structure of an NR system according to an embodiment of the present disclosure.
- a Next Generation Radio Access Network may include a next generation-Node B (gNB) and/or an eNB that provides user plane and control plane protocol termination to a UE.
- gNB next generation-Node B
- eNB that provides user plane and control plane protocol termination to a UE.
- 4 illustrates a case including only gNB.
- gNB and eNB are connected to each other through an Xn interface.
- the gNB and the eNB are connected to a 5G Core Network (5GC) through an NG interface.
- 5GC 5G Core Network
- AMF access and mobility management function
- UPF user plane function
- 5 illustrates functional partitioning between NG-RAN and 5GC according to an embodiment of the present disclosure.
- the gNB provides inter-cell radio resource management (Inter Cell RRM), radio bearer management (RB control), connection mobility control, radio admission control, measurement setup and provision. (Measurement configuration & provision) and dynamic resource allocation.
- AMF may provide functions such as Non Access Stratum (NAS) security and idle state mobility processing.
- the UPF may provide functions such as mobility anchoring and PDU (Protocol Data Unit) processing.
- Session Management Function (SMF) may provide functions such as terminal IP (Internet Protocol) address allocation and PDU session control.
- FIG. 6 shows a structure of a radio frame of NR to which the present disclosure can be applied.
- radio frames can be used in uplink and downlink transmission in NR.
- a radio frame has a length of 10 ms and may be defined as two 5 ms half-frames (Half-Frame, HF).
- a half-frame may include five 1ms subframes (Subframes, SFs).
- a subframe may be divided into one or more slots, and the number of slots in a subframe may be determined according to a subcarrier spacing (SCS).
- SCS subcarrier spacing
- Each slot may include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).
- CP cyclic prefix
- each slot may include 14 symbols.
- each slot may include 12 symbols.
- the symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or DFT-s-OFDM symbol).
- Table 1 shows the number of symbols per slot according to the SCS setting ( ⁇ ) when the normal CP is used. ), the number of slots per frame ( ) and the number of slots per subframe ( ) exemplifies.
- Table 2 illustrates the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to the SCS when the extended CP is used.
- OFDM(A) numerology eg, SCS, CP length, etc.
- OFDM(A) numerology eg, SCS, CP length, etc.
- the (absolute time) interval of time resources e.g., subframes, slots, or TTIs
- TU Time Unit
- multiple numerologies or SCSs to support various 5G services can be supported. For example, when the SCS is 15 kHz, wide area in traditional cellular bands can be supported, and when the SCS is 30 kHz/60 kHz, dense-urban, lower latency latency and wider carrier bandwidth may be supported. When the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz may be supported to overcome phase noise.
- An NR frequency band may be defined as two types of frequency ranges.
- the two types of frequency ranges may be FR1 and FR2.
- the number of frequency ranges may be changed, and for example, the two types of frequency ranges may be shown in Table 3 below.
- FR1 may mean "sub 6 GHz range”
- FR2 may mean “above 6 GHz range” and may be called millimeter wave (mmW).
- mmW millimeter wave
- FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, and may be used, for example, for vehicle communication (eg, autonomous driving).
- FIG. 7 illustrates a slot structure of an NR frame according to an embodiment of the present disclosure.
- a slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 14 symbols, but in the case of an extended CP, one slot may include 12 symbols. Alternatively, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot may include 6 symbols.
- a carrier includes a plurality of subcarriers in the frequency domain.
- a resource block (RB) may be defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain.
- a bandwidth part (BWP) may be defined as a plurality of consecutive (P)RBs ((Physical) Resource Blocks) in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.) there is.
- a carrier may include up to N (eg, 5) BWPs. Data communication may be performed through an activated BWP.
- Each element may be referred to as a resource element (RE) in the resource grid, and one complex symbol may be mapped.
- RE resource element
- a radio interface between a terminal and a terminal or a radio interface between a terminal and a network may be composed of an L1 layer, an L2 layer, and an L3 layer.
- the L1 layer may mean a physical layer.
- the L2 layer may mean at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer.
- the L3 layer may mean an RRC layer.
- V2X or SL (sidelink) communication will be described.
- FIG. 8 illustrates a radio protocol architecture for SL communication according to an embodiment of the present disclosure. Specifically, (a) of FIG. 8 shows a user plane protocol stack of LTE, and (b) of FIG. 8 shows a control plane protocol stack of LTE.
- FIG. 9 illustrates a radio protocol architecture for SL communication according to an embodiment of the present disclosure. Specifically, (a) of FIG. 9 shows a user plane protocol stack of NR, and (b) of FIG. 9 shows a control plane protocol stack of NR.
- the transmission mode may be referred to as a mode or a resource allocation mode.
- a transmission mode in LTE may be referred to as an LTE transmission mode
- a transmission mode in NR may be referred to as an NR resource allocation mode.
- (a) of FIG. 10 shows a terminal operation related to LTE transmission mode 1 or LTE transmission mode 3.
- (a) of FIG. 10 shows a terminal operation related to NR resource allocation mode 1.
- LTE transmission mode 1 may be applied to general SL communication
- LTE transmission mode 3 may be applied to V2X communication.
- (b) of FIG. 10 shows a terminal operation related to LTE transmission mode 2 or LTE transmission mode 4.
- (b) of FIG. 10 shows a terminal operation related to NR resource allocation mode 2.
- the base station may schedule SL resources to be used by the terminal for SL transmission.
- the base station may transmit information related to SL resources and/or information related to UL resources to the first terminal.
- the UL resource may include a PUCCH resource and/or a PUSCH resource.
- the UL resource may be a resource for reporting SL HARQ feedback to the base station.
- the first terminal may receive information related to dynamic grant (DG) resources and/or information related to configured grant (CG) resources from the base station.
- CG resources may include CG type 1 resources or CG type 2 resources.
- the DG resource may be a resource set/allocated by the base station to the first terminal through downlink control information (DCI).
- the CG resource may be a (periodic) resource configured/allocated by the base station to the first terminal through a DCI and/or RRC message.
- the base station may transmit an RRC message including information related to the CG resource to the first terminal.
- the base station may transmit an RRC message including information related to the CG resource to the first terminal, and the base station transmits a DCI related to activation or release of the CG resource. It can be transmitted to the first terminal.
- the first terminal may transmit a PSCCH (eg, Sidelink Control Information (SCI) or 1st-stage SCI) to the second terminal based on the resource scheduling.
- the first terminal may transmit a PSSCH (eg, 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal.
- the first terminal may receive the PSFCH related to the PSCCH/PSSCH from the second terminal. For example, HARQ feedback information (eg, NACK information or ACK information) may be received from the second terminal through the PSFCH.
- the first terminal may transmit / report HARQ feedback information to the base station through PUCCH or PUSCH.
- the HARQ feedback information reported to the base station may be information that the first terminal generates based on the HARQ feedback information received from the second terminal.
- the HARQ feedback information reported to the base station may be information generated by the first terminal based on a rule set in advance.
- the DCI may be a DCI for SL scheduling.
- the format of the DCI may be DCI format 3_0 or DCI format 3_1. Table 5 shows an example of DCI for SL scheduling.
- the terminal can determine an SL transmission resource within an SL resource set by the base station / network or a preset SL resource there is.
- the set SL resource or the preset SL resource may be a resource pool.
- the terminal may autonomously select or schedule resources for SL transmission.
- the terminal may perform SL communication by selecting a resource by itself within a configured resource pool.
- the terminal may select a resource by itself within a selection window by performing a sensing and resource (re)selection procedure.
- the sensing may be performed in units of subchannels.
- the first terminal that has selected a resource within the resource pool by itself can transmit a PSCCH (eg, Sidelink Control Information (SCI) or 1st-stage SCI) to the second terminal using the resource.
- a PSCCH eg, Sidelink Control Information (SCI) or 1st-stage SCI
- the first terminal may transmit a PSSCH (eg, 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal.
- the first terminal may receive the PSFCH related to the PSCCH/PSSCH from the second terminal.
- UE 1 may transmit SCI to UE 2 on PSCCH.
- UE 1 may transmit two consecutive SCI (eg, 2-stage SCI) to UE 2 on PSCCH and/or PSSCH.
- UE 2 may decode two consecutive SCIs (eg, 2-stage SCI) in order to receive the PSSCH from UE 1.
- SCI transmitted on PSCCH may be referred to as a 1st SCI, 1st SCI, 1st-stage SCI or 1st-stage SCI format
- SCI transmitted on PSSCH is 2nd SCI, 2nd SCI, 2nd-stage SCI or It may be referred to as a 2nd-stage SCI format
- the 1st-stage SCI format may include SCI format 1-A
- the 2nd-stage SCI format may include SCI format 2-A and/or SCI format 2-B.
- Table 6 shows an example of the 1st-stage SCI format.
- Table 7 shows an example of a 2nd-stage SCI format.
- the first terminal may receive the PSFCH based on Table 8.
- UE 1 and UE 2 may determine PSFCH resources based on Table 8, and UE 2 may transmit HARQ feedback to UE 1 using the PSFCH resource.
- the first terminal may transmit SL HARQ feedback to the base station through PUCCH and/or PUSCH based on Table 9.
- Table 10 below is disclosure related to selection and reselection of sidelink relay UEs in 3GPP TS 36.331.
- the disclosure of Table 11 is used as a prior art of this disclosure, and for related details, refer to 3GPP TS 36.331, and to refer to 3GPP TR 38.836 for specific architecture of Relay UE.
- positioning methods supported by NG-RAN include GNSS, OTDOA, E-CID (enhanced cell ID), barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS (terrestrial beacon system), UTDOA (Uplink Time Difference of Arrival) etc. may be present.
- the position of the UE may be measured using any one of the above positioning methods, but the position of the UE may be measured using two or more positioning methods.
- FIG. 11 is a diagram for explaining an OTDOA (Observed Time Difference Of Arrival) positioning method according to an embodiment of the present disclosure.
- OTDOA Observed Time Difference Of Arrival
- the OTDOA positioning method uses measurement timing of downlink signals received by a UE from multiple TPs including an eNB, ng-eNB and a PRS dedicated TP.
- the UE uses the location assistance data received from the location server to measure the timing of the received downlink signals.
- the location of the UE may be determined based on the measurement result and the geographic coordinates of neighboring TPs.
- a UE connected to the gNB may request a measurement gap for OTDOA measurement from the TP. If the UE does not recognize a single frequency network (SFN) for at least one TP in the OTDOA auxiliary data, the UE refers to OTDOA before requesting a measurement gap to perform a Reference Signal Time Difference (RSTD) measurement.
- SFN single frequency network
- RSTD Reference Signal Time Difference
- An autonomous gap may be used to acquire the SFN of a reference cell.
- the RSTD may be defined based on the smallest relative time difference between the boundaries of two subframes each received from the reference cell and the measurement cell. That is, RSTD is a relative value between the start time of the subframe of the reference cell closest to the start time of the subframe received from the measurement cell and the start time of the subframe of the reference cell closest to the start time of the subframe received from the measurement cell. It can be calculated based on the time difference. Meanwhile, a reference cell may be selected by the UE.
- TOA time of arrival
- RSTD for two TPs may be calculated based on Equation 1.
- ⁇ xt, yt ⁇ are the (unknown) coordinates of the target UE
- ⁇ xi, yi ⁇ are the (known) coordinates of the TP
- ⁇ x1, y1 ⁇ is the reference TP (or other TP) may be coordinates.
- (Ti-T1) is a transmission time offset between two TPs, and may be named “Real Time Differences” (RTDs)
- ni and n1 may represent values related to UE TOA measurement errors.
- the location of the UE may be measured through geographic information of the serving ng-eNB, serving gNB and/or serving cell of the UE.
- geographic information of the serving ng-eNB, the serving gNB, and/or the serving cell may be obtained through paging, registration, and the like.
- the E-CID positioning method may use additional UE measurement and/or NG-RAN radio resources for improving the UE position estimation value in addition to the CID positioning method.
- some of the same measurement methods as the measurement control system of the RRC protocol may be used, but in general, additional measurement is not performed only for the location measurement of the UE.
- a separate measurement configuration or measurement control message may not be provided to measure the location of the UE, and the UE does not expect an additional measurement operation only for location measurement to be requested.
- the UE may report measurement values obtained through generally measurable measurement methods.
- the serving gNB may implement the E-CID location method using E-UTRA measurements provided from the UE.
- measurement elements that can be used for E-CID positioning may be as follows.
- E-UTRA RSRP Reference Signal Received Power
- E-UTRA RSRQ Reference Signal Received Quality
- UE E-UTRA reception-transmission time difference Rx-Tx Time difference
- GERAN GSM EDGE Random Access Network
- WLAN RSSI Reference Signal Strength Indication
- UTRAN CPICH Common Pilot Channel
- RSCP Receiveived Signal Code Power
- -E-UTRAN measurement ng-eNB reception-transmission time difference (Rx-Tx Time difference), timing advance (TADV), Angle of Arrival (AoA)
- TADV can be divided into Type 1 and Type 2 as follows.
- TADV Type 1 (ng-eNB reception-transmission time difference) + (UE E-UTRA reception-transmission time difference)
- TADV Type 2 ng-eNB receive-transmit time difference
- AoA may be used to measure the direction of the UE.
- AoA may be defined as the estimated angle of the UE's position 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.
- SRS sounding reference signal
- DMRS demodulation reference signal
- the larger the array of antenna arrays the higher the accuracy of AoA measurement.
- signals received from adjacent antenna elements may have a constant phase-rotation.
- UTDOA is a method of determining the location of a UE by estimating the arrival time of the SRS.
- the location of the UE can be estimated through a difference in arrival time with another cell (or base station/TP) by using the serving cell as a reference cell.
- the E-SMLC may indicate a serving cell of the target UE in order to instruct the target UE to transmit SRS.
- the E-SMLC may provide configurations such as periodic/aperiodic SRS, bandwidth, and frequency/group/sequence hopping.
- UE positioning measurement methods can be largely classified into two.
- One is a method in which the UE performs positioning by itself.
- the UE may calculate the location of the UE by itself using the TDoA method by measuring the PRS transmitted from the gNB.
- UE1 receives PRSs from gNB1, gNB2, and gNB3, respectively, and the time of the received PRS value between the location of each gNB and links (a, b), (a, c), and (b, c).
- UE1 needs to know the location of each gNB, and it is assumed that UE1 knows the location of each gNB in advance.
- Another method of calculating the location of UE1 is to transmit the time difference of the PRS value measured by UE1 to its own serving cell, calculate the location of UE1 in the LMF (Location Management Function) connected to the serving cell, and This is the method of forwarding to UE1.
- the time difference (RSTD (Reference Signal Time Difference Measurement)) of PRS values received from the serving gNB and other nearby gNBs is reported to its own serving cell along with the gNB ID (/cell ID) value.
- RSTD Reference Signal Time Difference Measurement
- UE1 since the LMF knows the location of each gNB, UE1 does not need to know the location of each gNB.
- the LMF which calculates the location value of the UE using the PRS value received from the UE, transmits the calculated location value to the corresponding UE.
- the second method the method using LMF, was first introduced into the standard, and in this case, it is possible only in the RRC CONNECTED state.
- the first method UE-based location measurement, does not require UE1 to be in the RRC CONNECTED state with its own serving cell according to the procedure, but the operation is limited to operate only in the RRC CONNECTED state in the current standard. This is determined under the assumption that positioning information will eventually be managed in the CN (Core network), but may change when SL positioning is introduced (Rel-18).
- the CN may be estimating the location of the UE, but it may only know the approximate location or may not know the location. Several of these values can be calculated (RSTD) and the calculated values can be reported to the LMF.
- the serving base station/TRP of the UE must be included in the base station/transmission-reception point (TRP) set performing PRS transmission.
- TRP base station/transmission-reception point
- the target UE related to positioning was limited to the RRC CONNECTED state, because it was assumed that the PRS quality transmitted by the serving base station/TRP was the best from the point of view of the corresponding terminal.
- the relay UE When the relay UE and the remote UE are camping on the same cell, the relay UE transmits a posSIB (Positioning SIB) to the remote UE, and the remote UE knows the PRS location of the neighboring gNB and its own serving cell through the configuration of the posSIB. can Through this, it is possible for the remote UE to measure its location using the UE-based and LMF-based methods described above.
- posSIB Positioning SIB
- the relay UE and the remote UE have different best RSRP base stations/TRPs, or when the recommended reference base stations/TRPs required for RSTD measurement related to positioning of the relay UE and the remote UE are different from each other, a case that differs from the existing operation can be considered.
- a case that differs from the existing operation can be considered.
- one UE Relay or remote UE
- uses TRP#1/2 for RSTD#1 measurement and TRP#2/3 for RSTD#2 measurement referring to TPR#2, etc. can mean
- the location of the remote UE is determined. Suggestions on how to measure
- a remote UE may establish a connection with a relay UE (S1301 of FIG. 13).
- the remote UE may receive information related to a positioning reference signal (PRS) transmitted by a plurality of base stations (S1301). Based on the information related to the PRS, the remote UE may receive a plurality of PRSs from at least some of the plurality of base stations (S1303).
- the remote UE may measure a Reference Signal Time Difference Measurement (RSTD) of each pair of the plurality of PRSs (S1304).
- RSTD Reference Signal Time Difference Measurement
- the at least some base stations may necessarily include a base station having the best signal strength among base stations measured by the remote UE or a recommended base station of the remote UE.
- the remote UE may transmit information related to a base station having the best signal strength or a recommended base station of the remote UE to the serving base station.
- the remote UE can necessarily use the PRS of a base station having the best signal strength reported by the remote UE or a recommended base station of the remote UE.
- the remote UE receives the PRS from the at least some base stations, measures the RSTD of each pair of the plurality of PRSs, and determines the location directly based on the RSTD, or transmits the measurement result to the serving cell and the measurement Based on the result, information related to the location of the remote UE determined by a Location Management Function (LMF) may be received.
- LMF Location Management Function
- the base station(s) transmitting the PRS used to determine the location of the remote UE must necessarily include a base station having the best signal strength among base stations measured by the remote UE or a recommended base station of the remote UE.
- a base station having the best signal strength based on the remote UE or a recommended base station of the remote UE (or a PRS transmitted by such base stations) must be used.
- the remote UE when the remote UE and the relay UE have different best RSRP base stations/TRPs, or when the recommended reference base stations/TRPs required for positioning-related RSTD measurement between the relay UE and the remote UE are different from each other, the remote UE operates in its own serving cell It may not be easy to receive a PRS directly from This is because the remote UE's serving cell is always regarded as the relay UE's serving cell, so the remote UE may have a large physical distance from the serving cell.
- a base station based on the remote UE in determining the location of the remote UE (a base station having the best signal strength or a recommended base station of the remote UE (or a PRS transmitted by such base stations)) By ensuring that this is used, measurement errors can be reduced.
- the remote UE may have a serving cell other than the serving cell of the relay UE as a serving cell before the connection establishment. That is, it may be a case where the remote UE and the relay UE exist in different cells. Alternatively, it may be a case of having different best RSRP base stations/TRPs, or a case where recommended reference base stations/TRPs required for positioning-related RSTD measurement of the relay UE and the remote UE are different from each other.
- the above content does not mean that the embodiments according to the present disclosure are necessarily applied / used only in this case, and the embodiments according to the present disclosure may be applied / used other than the cases exemplified above.
- the remote UE may not perform measurement on the serving cell.
- the serving cell does not correspond to one of the plurality of base stations that have transmitted the PRS for which RSTD must be measured, measurement of the serving cell is performed. is to avoid doing it.
- information related to a base station having the best signal strength or a recommended base station of the remote UE may be included in an on-demand SIB request transmitted from the remote UE to the serving base station through the relay UE.
- information related to the PRS transmitted by the plurality of base stations is included in proSIB, and the proSIB may include PRS configuration related to the plurality of base stations, and the proSIB is transmitted from the serving base station of the relay UE.
- the serving base station of the relay UE may be the same as the serving base station of the remote UE.
- the remote UE determines the location of the remote UE based on the measurement result, or the remote UE transmits the measurement result to the serving cell and determines the location of the remote UE determined by the LMF based on the measurement result. Information related to location may be received. In the following, each of these two cases will be examined in detail.
- UE1 which wants to perform positioning calculation, uses the value configured in the posSIB transmitted from the serving UE to measure its position using the time difference between the PRS transmitted from the serving cell and the PRS transmitted from other gNBs.
- the CN configures the gNB to transmit the PRS for UE1.
- the selected gNB must include UE1's serving cell gNB (/CONNECTED gNB) (because the service cell corresponds to the cell with the best signal strength from UE1's point of view), and several gNBs can be selected centered on UE1, Location information of the gNB may also be informed.
- a UE wishing to calculate location information must select a gNB present at a position forming a triangle with the UE as the center, so that accurate positioning can be derived.
- FIG. 14 (b) illustrates a UE-based positioning method according to an embodiment of the present disclosure.
- a remote UE requests an on-demand SIB related to posSIB to its serving cell through a relay UE
- information about the base station that has transmitted the best RSRP measured by the remote UE eg, cell ID, gNB ID, etc.
- the CN of gNB1 which is the serving cell of the remote UE, configures the gNB near the cell in which the remote UE exists to transmit PRS for the remote UE, and transmits the posSIB to the remote UE.
- the CN that has received the above information transfers posSIB information including PRS configuration and location information of gNBs capable of measuring PRS to nearby gNBs from which the relay UE can measure PRS.
- the base station information (/ list) carrying the PRS that can be delivered to the posSIB can be configured to include the base station information reported as the best RSRP base station / TRP measured by the remote UE and the recommended reference base station / TRP.
- a list of IDs (gNB IDs) of cells that the remote UE has determined to be capable of receiving signals may be transmitted as assistance information. This is for the CN to be able to properly determine neighboring cell information (gNB information) through which the current remote UE can easily receive a PRS value.
- the remote UE may exclude an operation including the PRS of a serving cell to which it is RRC CONNECTED when performing positioning by an existing general UE. Instead, the PRS measurement value of the base station considered (reported) as the best RSRP base station/TRP measured by the remote UE itself and the recommended reference base station/TRP may be set/configured to calculate the location without fail. That is, the time difference between PRSs transmitted from other gNBs configured by the CN is measured, but the PRS values of the best RSRP base station/TRP and recommended reference base station/TRP measured by the remote UE are necessarily included when calculating the RSTD, so that the time difference Actions can also be configured to measure .
- FIG. 15 shows a conventional LMF-based location measurement method of a remote UE (FIG. 15(a)) and an LMF-based location measurement method of a remote UE according to the present disclosure (FIG. 15(b)) ) has each city door.
- a UE desiring to perform a positioning operation must be in an RRC CONNECTED state with a serving cell and receive a posSIB from the serving cell.
- a gNB to measure PRS is determined based on the received posSIB information.
- the serving cell transmits it to the CN and transmits it to the CN.
- the LMF calculates the location and informs the corresponding UE again. Through this, the UE can know its current location.
- a remote UE existing in a cell different from the relay UE may request a posSIB from the serving gNB on-demand when performing LMF based positioning.
- the remote UE may transmit information including the best RSRP base station/TRP and recommended reference base station/TRP measured by the remote UE. (and/or) information such as a neighbor gNB ID (/cell ID) list that is easy to receive may also be transmitted.
- the CN receiving this is the remote UE's best RSRP base station/TRP, recommended reference base station/TRP information information (and/or) gNBs around the remote UE included in the list of neighbor gNB ID (/cell ID) that the remote UE can easily receive can be configured to transmit PRS.
- the best RSRP base station/TRP and recommended reference base station/TRP information eg gNB ID, cell ID
- the base station/TRP information transmitting the PRS may be transmitted to the remote UE through posSIB.
- the remote UE Upon receiving the posSIB, the remote UE measures a time difference (RSTD) between PRSs transmitted by neighboring gNBs based on the PRS configuration included in the posSIB and transmits it to the serving cell through the relay UE.
- RSTD time difference
- the remote UE may limit the operation to necessarily include the time difference calculation result using the information of the best RSRP base station/TRP measured/reported by the remote UE and the recommended reference base station/TRP.
- the PRS of its own serving cell is not measured, but the measurement result can be reported to the serving cell.
- a remote UE in a wireless communication system, includes at least one processor; and at least one computer memory operably coupled to the at least one processor, wherein the at least one computer memory stores instructions that, when executed, cause the at least one processor to perform operations, the operations comprising: establishing a connection with a relay UE; establish; Receiving information related to a positioning reference signal (PRS) transmitted by a plurality of base stations; Receiving a plurality of PRSs from at least some of the plurality of base stations; and measuring a Reference Signal Time Difference Measurement (RSTD) of each pair of the plurality of PRSs, and in the at least some base stations, a base station having the best signal strength among the base stations measured by the remote UE or the remote UE A recommended base station must be included.
- PRS positioning reference signal
- RSTD Reference Signal Time Difference Measurement
- the operations include establishing a connection with the relay UE; Receiving information related to a positioning reference signal (PRS) transmitted by a plurality of base stations; Receiving a plurality of PRSs from at least some of the plurality of base stations; and measuring a Reference Signal Time Difference Measurement (RSTD) of each pair of the plurality of PRSs, and in the at least some base stations, a base station having the best signal strength among the base stations measured by the remote UE or the remote UE A recommended base station must be included.
- PRS positioning reference signal
- RSTD Reference Signal Time Difference Measurement
- a non-volatile computer readable storage medium storing 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 relay UE, the operations , establish a connection with the relay UE; Receiving information related to a positioning reference signal (PRS) transmitted by a plurality of base stations; Receiving a plurality of PRSs from at least some of the plurality of base stations; and measuring a Reference Signal Time Difference Measurement (RSTD) of each pair of the plurality of PRSs, and in the at least some base stations, a base station having the best signal strength among the base stations measured by the remote UE or the remote UE A recommended base station must be included.
- PRS positioning reference signal
- RSTD Reference Signal Time Difference Measurement
- the following PRS measurement method for reducing power consumption of a remote UE may be used/applied.
- the remote UE is highly likely to be a UE requiring low power. Therefore, the fact that the remote UE always measures the RSRP of Uu can be a burden in terms of power consumption of the remote UE. Therefore, as a method of reducing the measurement burden (eg, SSS, PBCH DMRS) of the remote UE, the following is proposed.
- the measurement burden eg, SSS, PBCH DMRS
- the corresponding RSRP measurement may be set to be performed.
- the parameters related to RSRP measurement frequency/cycle or event triggering/probability for the above purpose may be set differently according to parameters such as the degree of change in the location of the remote UE and the moving speed.
- the RSRP measurement value that can be compared with the DL PRS measurement may be a separate RSRP measurement triggered for positioning or an RSRP measurement measured for switching between an indirect path and a direct path.
- FIG. 16 illustrates a communication system 1 applied to the present disclosure.
- a communication system 1 applied to the present disclosure includes a wireless device, a base station, and a network.
- the wireless device means a device that performs communication using a radio access technology (eg, 5G New RAT (NR), Long Term Evolution (LTE)), and may be referred to as a communication/wireless/5G device.
- wireless devices include robots 100a, vehicles 100b-1 and 100b-2, XR (eXtended Reality) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400.
- IoT Internet of Thing
- the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, and the like.
- the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
- UAV Unmanned Aerial Vehicle
- XR devices include Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) devices, Head-Mounted Devices (HMDs), Head-Up Displays (HUDs) installed in vehicles, televisions, smartphones, It may be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like.
- a portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, a smart glass), a computer (eg, a laptop computer, etc.), and the like.
- Home appliances may include a TV, a refrigerator, a washing machine, and the like.
- IoT devices may include sensors, smart meters, and the like.
- a base station and a network may also be implemented as a wireless device, and a specific wireless device 200a may operate as a base station/network node to other wireless devices.
- the wireless devices 100a to 100f may be connected to the network 300 through the base station 200 .
- AI Artificial Intelligence
- 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 also communicate directly (eg, sidelink communication) without going through the base station/network.
- the vehicles 100b-1 and 100b-2 may perform direct communication (eg, vehicle to vehicle (V2V)/vehicle to everything (V2X) communication).
- IoT devices eg, sensors
- IoT devices may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.
- Wireless communication/connection 150a, 150b, and 150c may be performed between the wireless devices 100a to 100f/base station 200 and the base station 200/base station 200.
- wireless communication/connection refers to various wireless connections such as uplink/downlink communication 150a, sidelink communication 150b (or D2D communication), and inter-base station communication 150c (e.g. relay, Integrated Access Backhaul (IAB)).
- IAB Integrated Access Backhaul
- Wireless communication/connection (150a, 150b, 150c) allows wireless devices and base stations/wireless devices, and base stations and base stations to transmit/receive radio signals to/from each other.
- the wireless communication/connection 150a, 150b, and 150c may transmit/receive signals through various physical channels.
- various signal processing processes eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.
- resource allocation processes etc.
- FIG 17 illustrates a wireless device applicable to the present disclosure.
- the first wireless device 100 and the second wireless device 200 may transmit and receive radio signals through various radio access technologies (eg, LTE, NR).
- ⁇ the first wireless device 100, the second wireless device 200 ⁇ is the ⁇ wireless device 100x, the base station 200 ⁇ of FIG. 16 and/or the ⁇ wireless device 100x, the wireless device 100x.
- ⁇ can correspond.
- the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally 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 flowcharts of operations disclosed herein.
- the processor 102 may process information in the memory 104 to generate first information/signal, and transmit a radio signal including the first information/signal through the transceiver 106.
- the processor 102 may receive a radio signal including the second information/signal through the transceiver 106, and then store information obtained from signal processing of the second information/signal in the memory 104.
- the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 .
- memory 104 may perform some or all of the processes controlled by processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. It may store software codes including them.
- the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- the transceiver 106 may be coupled to the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 .
- the transceiver 106 may include a transmitter and/or a receiver.
- the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
- a wireless device may mean a communication modem/circuit/chip.
- the second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
- Processor 202 controls memory 204 and/or transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein.
- the processor 202 may process information in the memory 204 to generate third information/signal, and transmit a radio signal including the third information/signal through the transceiver 206.
- the processor 202 may receive a radio signal including the fourth information/signal through the transceiver 206 and store information obtained from signal processing of the fourth information/signal in the memory 204 .
- the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 .
- memory 204 may perform some or all of the processes controlled by processor 202, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein. It may store software codes including them.
- the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- the transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 .
- the transceiver 206 may include a transmitter and/or a receiver.
- the transceiver 206 may be used interchangeably with an RF unit.
- a wireless device may mean a communication modem/circuit/chip.
- one or more protocol layers may be implemented by one or more processors 102, 202.
- 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 generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed herein.
- PDUs Protocol Data Units
- SDUs Service Data Units
- processors 102, 202 may generate messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and/or operational flow diagrams disclosed herein.
- One or more processors 102, 202 generate PDUs, SDUs, messages, control information, data or signals (e.g., baseband signals) containing information according to the functions, procedures, proposals and/or methods disclosed herein , can be provided to one or more transceivers 106, 206.
- One or more processors 102, 202 may receive signals (eg, baseband signals) from one or more transceivers 106, 206, and descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed herein PDUs, SDUs, messages, control information, data or information can be obtained according to these.
- signals eg, baseband signals
- One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor or microcomputer.
- One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof.
- ASICs Application Specific Integrated Circuits
- DSPs Digital Signal Processors
- DSPDs Digital Signal Processing Devices
- PLDs Programmable Logic Devices
- FPGAs Field Programmable Gate Arrays
- firmware or software may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like.
- Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flow diagrams disclosed herein may be included in one or more processors 102, 202 or stored in one or more memories 104, 204 and It can be driven by the above processors 102 and 202.
- the descriptions, functions, procedures, suggestions, methods and/or operational flow charts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
- One or more memories 104, 204 may be coupled with one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions.
- One or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
- One or more memories 104, 204 may be located internally and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be coupled to one or more processors 102, 202 through various technologies, such as wired or wireless connections.
- One or more transceivers 106, 206 may transmit user data, control information, radio signals/channels, etc., as referred to in the methods and/or operational flow charts herein, to one or more other devices.
- One or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in descriptions, functions, procedures, proposals, methods and/or operational flow charts, etc. disclosed herein from one or more other devices. there is.
- one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals.
- 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. Additionally, 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 coupled with one or more antennas 108, 208, and one or more transceivers 106, 206 via one or more antennas 108, 208, as described herein, function. , procedures, proposals, methods and / or operation flowcharts, etc. can be set to transmit and receive user data, control information, radio signals / channels, etc.
- 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) convert the received radio signals/channels from RF band signals in order to process the received user data, control information, radio signals/channels, etc. using one or more processors (102, 202). It can be converted into a baseband signal.
- One or more transceivers 106 and 206 may convert user data, control information, and radio signals/channels processed by one or more processors 102 and 202 from baseband signals to RF band signals.
- one or more of the transceivers 106, 206 may include (analog) oscillators and/or filters.
- Vehicles or autonomous vehicles may be implemented as mobile robots, vehicles, trains, manned/unmanned aerial vehicles (AVs), ships, and the like.
- AVs manned/unmanned aerial vehicles
- a 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 an autonomous driving unit.
- a portion 140d may be included.
- the antenna unit 108 may be configured as part of the communication unit 110 .
- the communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, base stations (e.g. base stations, roadside base stations, etc.), servers, and the like.
- the controller 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100 .
- the controller 120 may include an Electronic Control Unit (ECU).
- the driving unit 140a may drive the vehicle or autonomous vehicle 100 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 autonomous vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like.
- the sensor unit 140c may obtain vehicle conditions, surrounding environment information, and user information.
- the sensor unit 140c includes an inertial measurement unit (IMU) 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 forward.
- IMU inertial measurement unit
- /Can include a reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illuminance sensor, pedal position sensor, and the like.
- the autonomous driving unit 140d includes a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and a technology for automatically setting a route when a destination is set and driving. technology can be implemented.
- the communication unit 110 may receive map data, traffic information data, and the like 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 autonomous vehicle 100 moves along the autonomous driving path according to the driving plan (eg, speed/direction adjustment).
- the communicator 110 may non-/periodically obtain the latest traffic information data from an external server and obtain surrounding traffic information data from surrounding vehicles.
- the sensor unit 140c may acquire vehicle state and surrounding environment information.
- the autonomous driving unit 140d may update an autonomous driving route and a driving plan based on newly acquired data/information.
- the communication unit 110 may transmit information about a vehicle location, an autonomous driving route, a driving plan, and the like to an external server.
- the external server may predict traffic information data in advance using AI technology based on information collected from the vehicle or self-driving vehicles, and may provide the predicted traffic information data to the vehicle or self-driving vehicles.
- a vehicle may be implemented as a means of transportation, a train, an air vehicle, a ship, and the like.
- the vehicle 100 may include a communication unit 110, a control unit 120, a memory unit 130, an input/output unit 140a, and a position measurement unit 140b.
- the communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) with other vehicles or external devices such as base stations.
- the controller 120 may perform various operations by controlling components of the vehicle 100 .
- the memory unit 130 may store data/parameters/programs/codes/commands supporting various functions of the vehicle 100 .
- the input/output unit 140a may output an AR/VR object based on information in the memory unit 130.
- the input/output unit 140a may include a HUD.
- the location measurement unit 140b may obtain location information of the vehicle 100 .
- the location information may include absolute location information of the vehicle 100, location information within a driving line, acceleration information, and location information with neighboring vehicles.
- the location measurement unit 140b may include GPS and various sensors.
- the communication unit 110 of the vehicle 100 may receive map information, traffic information, and the like from an external server and store them in the memory unit 130 .
- the location measurement unit 140b may acquire vehicle location information through GPS and various sensors and store it in the memory unit 130 .
- the controller 120 may generate a virtual object based on map information, traffic information, vehicle location information, etc., and the input/output unit 140a may display the created virtual object on a window in the vehicle (1410, 1420).
- the controller 120 may determine whether the vehicle 100 is normally operated within the driving line based on the vehicle location information. When the vehicle 100 abnormally deviate from the driving line, the controller 120 may display a warning on a window in the vehicle through the input/output unit 140a. In addition, the controller 120 may broadcast a warning message about driving abnormality to surrounding vehicles through the communication unit 110 .
- the controller 120 may transmit vehicle location information and information on driving/vehicle abnormalities to related agencies through the communication unit 110 .
- the XR device may be implemented as an HMD, a head-up display (HUD) provided in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.
- HMD head-up display
- the XR device may be implemented as an HMD, a head-up display (HUD) provided in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.
- HUD head-up display
- the XR device 100a may include a communication unit 110, a control unit 120, a memory unit 130, an input/output unit 140a, a sensor unit 140b, and a power supply unit 140c. .
- the communication unit 110 may transmit/receive signals (eg, media data, control signals, etc.) with external devices such as other wireless devices, portable devices, or media servers.
- Media data may include video, image, sound, and the like.
- the controller 120 may perform various operations by controlling components of the XR device 100a.
- the controller 120 may be configured to control and/or perform procedures such as video/image acquisition, (video/image) encoding, and metadata generation and processing.
- the memory unit 130 may store data/parameters/programs/codes/commands necessary for driving the XR device 100a/creating an XR object.
- the input/output unit 140a may obtain control information, data, etc. from the outside and output the created XR object.
- the input/output unit 140a may include a camera, a microphone, a user input unit, a display unit, a speaker, and/or a haptic module.
- the sensor unit 140b may obtain XR device status, surrounding environment information, user information, and the like.
- the sensor unit 140b may include a proximity sensor, an illuminance sensor, an acceleration sensor, a magnetic sensor, a gyro sensor, an inertial sensor, an RGB sensor, an IR sensor, a fingerprint recognition sensor, an ultrasonic sensor, an optical sensor, a microphone, and/or a radar. there is.
- the power supply unit 140c supplies power to the XR device 100a and may include a wired/wireless charging circuit, a battery, and the like.
- the memory unit 130 of the XR device 100a may include information (eg, data, etc.) necessary for generating an XR object (eg, AR/VR/MR object).
- the input/output unit 140a may obtain a command to operate the XR device 100a from a user, and the control unit 120 may drive the XR device 100a according to the user's driving command. For example, when a user tries to watch a movie, news, etc. through the XR device 100a, the control unit 120 transmits content request information to another device (eg, the mobile device 100b) or through the communication unit 130. can be sent to the media server.
- another device eg, the mobile device 100b
- the communication unit 130 can be sent to the media server.
- the communication unit 130 may download/stream content such as movies and news from another device (eg, the portable device 100b) or a media server to the memory unit 130 .
- the control unit 120 controls and/or performs procedures such as video/image acquisition, (video/image) encoding, metadata generation/processing, etc. for content, and acquisition through the input/output unit 140a/sensor unit 140b.
- An XR object may be created/output based on information about a surrounding space or a real object.
- the XR device 100a is wirelessly connected to the portable device 100b through the communication unit 110, and the operation of the XR device 100a may be controlled by the portable device 100b.
- the mobile device 100b may operate as a controller for the XR device 100a.
- the XR device 100a may acquire 3D location information of the portable device 100b and then generate and output an XR object corresponding to the portable device 100b.
- Robots may be classified into industrial, medical, household, military, and the like depending on the purpose or field of use.
- the robot 100 may include a communication unit 110, a control unit 120, a memory unit 130, an input/output unit 140a, a sensor unit 140b, and a driving unit 140c.
- the communication unit 110 may transmit/receive signals (eg, driving information, control signals, etc.) with external devices such as other wireless devices, other robots, or control servers.
- the controller 120 may perform various operations by controlling components of the robot 100 .
- the memory unit 130 may store data/parameters/programs/codes/commands supporting various functions of the robot 100.
- the input/output unit 140a may obtain information from the outside of the robot 100 and output the information to the outside of the robot 100 .
- the input/output unit 140a may include a camera, a microphone, a user input unit, a display unit, a speaker, and/or a haptic module.
- the sensor unit 140b may obtain internal information of the robot 100, surrounding environment information, user information, and the like.
- the sensor unit 140b may include a proximity sensor, an illuminance sensor, an acceleration sensor, a magnetic sensor, a gyro sensor, an inertial sensor, an IR sensor, a fingerprint recognition sensor, an ultrasonic sensor, an optical sensor, a microphone, a radar, and the like.
- the driving unit 140c may perform various physical operations such as moving a robot joint. In addition, the driving unit 140c may make the robot 100 drive on the ground or fly in the air.
- the driving unit 140c may include actuators, motors, wheels, brakes, propellers, and the like.
- AI devices include fixed or mobile devices such as TVs, projectors, smartphones, PCs, laptops, digital broadcasting terminals, tablet PCs, wearable devices, set-top boxes (STBs), radios, washing machines, refrigerators, digital signage, robots, and vehicles. It can be implemented with possible devices and the like.
- fixed or mobile devices such as TVs, projectors, smartphones, PCs, laptops, digital broadcasting terminals, tablet PCs, wearable devices, set-top boxes (STBs), radios, washing machines, refrigerators, digital signage, robots, and vehicles. It can be implemented with possible devices and the like.
- the AI device 100 includes a communication unit 110, a control unit 120, a memory unit 130, an input/output unit 140a/140b, a running processor unit 140c, and a sensor unit 140d.
- a communication unit 110 can include a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, and a wireless connection, and a wireless connection, and a wireless connection, and a wireless connection, and a wireless connection, and a wireless connection, and a wireless connection, and a wireless connection, and a wireless connection, and a wireless connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection, a Wi-Fi connection,
- the communication unit 110 transmits wired/wireless signals (eg, sensor information) with external devices such as other AI devices (eg, FIG. 16, 100x, 200, 400) or AI servers (eg, 400 in FIG. , user input, learning model, control signal, etc.) can be transmitted and received.
- external devices such as other AI devices (eg, FIG. 16, 100x, 200, 400) or AI servers (eg, 400 in FIG. , user input, learning model, control signal, etc.) can be transmitted and received.
- the communication unit 110 may transmit information in the memory unit 130 to an external device or transmit a signal received from the external device to the memory unit 130 .
- the controller 120 may determine at least one feasible operation of the AI device 100 based on information determined or generated using a data analysis algorithm or a machine learning algorithm. In addition, the controller 120 may perform the determined operation by controlling components of the AI device 100 . For example, the controller 120 may request, retrieve, receive, or utilize data from the learning processor unit 140c or the memory unit 130, and may perform a predicted operation among at least one feasible operation or an operation determined to be desirable. Components of the AI device 100 may be controlled to execute an operation. In addition, the control unit 120 collects history information including user feedback on the operation contents or operation of the AI device 100 and stores it in the memory unit 130 or the running processor unit 140c, or the AI server ( 16, 400) can be transmitted to an external device. The collected history information can be used to update the learning model.
- the memory unit 130 may store data supporting various functions of the AI device 100 .
- the memory unit 130 may store data obtained from the input unit 140a, data obtained from the communication unit 110, output data from the learning processor unit 140c, and data obtained from the sensing unit 140.
- the memory unit 130 may store control information and/or software codes necessary for operation/execution of the control unit 120 .
- the input unit 140a may obtain various types of data from the outside of the AI device 100.
- the input unit 140a may obtain learning data for model learning and input data to which the learning model is to be applied.
- the input unit 140a may include a camera, a microphone, and/or a user input unit.
- the output unit 140b may generate an output related to sight, hearing, or touch.
- the output unit 140b may include a display unit, a speaker, and/or a haptic module.
- the sensing unit 140 may obtain at least one of internal information of the AI device 100, surrounding environment information of the AI device 100, and user information by using various sensors.
- the sensing unit 140 may include a proximity sensor, an illuminance sensor, an acceleration sensor, a magnetic sensor, a gyro sensor, an inertial sensor, an RGB sensor, an IR sensor, a fingerprint recognition sensor, an ultrasonic sensor, an optical sensor, a microphone, and/or a radar. there is.
- the learning processor unit 140c may learn a model composed of an artificial neural network using learning data.
- the running processor unit 140c may perform AI processing together with the running processor unit of the AI server (400 in FIG. 16 ).
- the learning processor unit 140c may process information received from an external device through the communication unit 110 and/or information stored in the memory unit 130 .
- the output value of the learning processor unit 140c may be transmitted to an external device through the communication unit 110 and/or stored in the memory unit 130.
- Embodiments as described above can be applied to various mobile communication systems.
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Abstract
Description
Claims (15)
- 무선통신시스템에서 리모트 UE의 동작 방법에 있어서,상기 리모트 UE가 복수의 기지국이 전송하는 PRS(Positioning Reference Signal)에 관련된 정보를 수신;상기 리모트 UE가 상기 복수의 기지국 중 적어도 일부의 기지국으로부터 복수의 PRS를 수신;상기 리모트 UE가 상기 복수의 PRS의 각 쌍(pair)의 RSTD(Reference Signal Time Difference Measurement)를 측정;을 포함하며,상기 적어도 일부의 기지국에는 상기 리모트 UE가 측정한 기지국 중 신호강도가 가장 좋은 기지국 또는 상기 리모트 UE의 recommended 기지국이 반드시 포함되는, 방법.
- 제1항에 있어서,상기 리모트 UE는 상기 신호강도가 가장 좋은 기지국 또는 상기 리모트 UE의 recommended 기지국에 관련된 정보를 서빙 기지국으로 전송하는, 방법.
- 제1항에 있어서,상기 리모트 UE는 상기 위치 결정시, 상기 리모트 UE가 보고한, 상기 신호강도가 가장 좋은 기지국 또는 상기 리모트 UE의 recommended 기지국의 PRS를 반드시 사용하는, 방법.
- 제1항에 있어서,상기 리모트 UE는 상기 위치 결정시, 서빙 셀에 대한 측정은 수행하지 않는, 방법.
- 제1항에 있어서,상기 리모트 UE는 상기 측정 결과에 기초하여 상기 리모트 UE의 위치를 결정하는, 방법.
- 제1항에 있어서,상기 리모트 UE는 상기 측정 결과를 서빙 셀로 전송하고, 상기 측정 결과에 기초하여 LMF(Location Management Function)가 결정한 상기 리모트 UE의 위치에 관련된 정보를 수신하는, 방법.
- 제2항에 있어서,상기 신호강도가 가장 좋은 기지국 또는 상기 리모트 UE의 recommended 기지국에 관련된 정보는 상기 리모트 UE가 상기 릴레이 UE를 통해 서빙 기지국으로 전송하는 on-demand SIB 요청에 포함된 것인, 방법.
- 제1항에 있어서,상기 복수의 기지국이 전송하는 PRS에 관련된 정보는 proSIB에 포함된 것인, 방법.
- 제8항에 있어서,상기 proSIB은 상기 복수의 기지국에 관련된 PRS configuration을 포함하는, 방법.
- 제8항에 있어서,상기 proSIB는 상기 릴레이 UE의 서빙 기지국으로부터 전송된 것인, 방법.
- 제1항에 있어서,상기 릴레이 UE의 서빙 기지국은 상기 리모트 UE의 서빙 기지국과 동일한 것인, 방법.
- 무선통신시스템에서, 리모트 UE에 있어서,적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하게 연결될 수 있고, 실행될 때 상기 적어도 하나의 프로세서로 하여금 동작들을 수행하게 하는 명령들을 저장하는 적어도 하나의 컴퓨터 메모리를 포함하며,상기 동작들은,복수의 기지국이 전송하는 PRS(Positioning Reference Signal)에 관련된 정보를 수신;상기 복수의 기지국 중 적어도 일부의 기지국으로부터 복수의 PRS를 수신;상기 복수의 PRS의 각 쌍(pair)의 RSTD(Reference Signal Time Difference Measurement)를 측정;을 포함하며,상기 적어도 일부의 기지국에는 상기 리모트 UE가 측정한 기지국 중 신호강도가 가장 좋은 기지국 또는 상기 리모트 UE의 recommended 기지국이 반드시 포함되는, 리모트 UE.
- 제12항에 있어서,상기 리모트 UE는 다른 UE, 자율주행 차량에 관련된 UE 또는 기지국 또는 네트워크 중 적어도 하나와 통신하는 것인, 리모트 UE.
- 무선통신시스템에서, 릴레이 UE를 위한 동작들을 수행하게 하는 프로세서에 있어서,상기 동작들은,복수의 기지국이 전송하는 PRS(Positioning Reference Signal)에 관련된 정보를 수신;상기 복수의 기지국 중 적어도 일부의 기지국으로부터 복수의 PRS를 수신;상기 복수의 PRS의 각 쌍(pair)의 RSTD(Reference Signal Time Difference Measurement)를 측정;을 포함하며,상기 적어도 일부의 기지국에는 상기 리모트 UE가 측정한 기지국 중 신호강도가 가장 좋은 기지국 또는 상기 리모트 UE의 recommended 기지국이 반드시 포함되는, 프로세서.
- 적어도 하나의 프로세서에 의해 실행될 때, 적어도 하나의 프로세서가 릴레이 UE를 위한 동작들을 수행하게 하는 명령을 포함하는 적어도 하나의 컴퓨터 프로그램을 저장하는 비휘발성 컴퓨터 판독 가능 저장 매체에 있어서,상기 동작들은,복수의 기지국이 전송하는 PRS(Positioning Reference Signal)에 관련된 정보를 수신;상기 복수의 기지국 중 적어도 일부의 기지국으로부터 복수의 PRS를 수신;상기 복수의 PRS의 각 쌍(pair)의 RSTD(Reference Signal Time Difference Measurement)를 측정;을 포함하며,상기 적어도 일부의 기지국에는 상기 리모트 UE가 측정한 기지국 중 신호강도가 가장 좋은 기지국 또는 상기 리모트 UE의 recommended 기지국이 반드시 포함되는, 저장매체.
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KR20140081498A (ko) * | 2012-12-21 | 2014-07-01 | 주식회사 케이티 | 기지국, 측위 장치, 및 그의 측위 방법 |
WO2016137308A1 (ko) * | 2015-02-27 | 2016-09-01 | 엘지전자 주식회사 | 무선 통신 시스템에서 otdoa 관련 동작 수행 방법 |
KR20170134116A (ko) * | 2016-05-27 | 2017-12-06 | 성균관대학교산학협력단 | 무선 통신 시스템에서 단말의 위치를 측정하기 위한 방법, 로케이션 서버 및 단말 |
US20200344712A1 (en) * | 2019-04-25 | 2020-10-29 | Qualcomm Incorporated | Systems and methods for positioning reference signal staggering configuration |
WO2020256365A1 (ko) * | 2019-06-21 | 2020-12-24 | 엘지전자 주식회사 | 사이드링크 tdoa에 기반한 포지셔닝 |
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KR20140081498A (ko) * | 2012-12-21 | 2014-07-01 | 주식회사 케이티 | 기지국, 측위 장치, 및 그의 측위 방법 |
WO2016137308A1 (ko) * | 2015-02-27 | 2016-09-01 | 엘지전자 주식회사 | 무선 통신 시스템에서 otdoa 관련 동작 수행 방법 |
KR20170134116A (ko) * | 2016-05-27 | 2017-12-06 | 성균관대학교산학협력단 | 무선 통신 시스템에서 단말의 위치를 측정하기 위한 방법, 로케이션 서버 및 단말 |
US20200344712A1 (en) * | 2019-04-25 | 2020-10-29 | Qualcomm Incorporated | Systems and methods for positioning reference signal staggering configuration |
WO2020256365A1 (ko) * | 2019-06-21 | 2020-12-24 | 엘지전자 주식회사 | 사이드링크 tdoa에 기반한 포지셔닝 |
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