Method for supporting multiple QoS levels in sidelink positioning in wireless communication system and apparatus therefor

Abstract

The present disclosure relates to a method by which a user equipment (UE) performs sidelink positioning in a wireless communication system. In particular, the method comprises the steps of: receiving a location information request message including information on a plurality of quality of service (QoS) levels; and transmitting, in response to the location information request message, a location information message including information on one QoS level among the plurality of QoS levels and location information related to the one QoS level.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for supporting multiple QoS (Quality of Service) levels in sidelink positioning in a wireless communication system. Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication services such as voice and data. Generally, wireless communication systems are multiple access systems capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and multi-carrier frequency division multiple access (MC-FDMA) systems.

[0003] Sidelink (SL) refers to a communication scheme in which a direct link is established between user equipments (UEs) and the UEs directly exchange voice or data without the intervention of a base station (BS). SL is seen as a solution to relieve the constraints of BS's rapidly growing data traffic.

[0004] Vehicle-to-everything (V2X) is a communication technology in which a vehicle exchanges information with another vehicle, pedestrians, and infrastructure through wired / wireless communications. V2X can be divided into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). V2X communication can be provided via the PC5 interface and / or the Uu interface.

[0005] As more and more communication devices require greater communication capacity, improved mobile broadband communication is required compared to existing radio access technologies (RATs). Therefore, a communication system considering services or UEs that are sensitive to reliability and delay is being discussed, and the next generation of wireless access technologies considering improved mobile broadband communication, massive machine type communication (MTC), and ultra-reliable low latency communication (URLLC) may be referred to as new RAT or new radio (NR). V2X communication may also be supported in NR. Summary of the invention

[0006] Technical tasks

[0007] An aspect of the present disclosure designed based on the above discussion is to provide a method and apparatus for supporting multiple QoS (Quality of Service) levels in sidelink positioning in a wireless communication system.

[0008] The objectives to be achieved by the present disclosure are not limited to the contents specifically described above, and those skilled in the art will more clearly understand other objectives not described herein from the following detailed description.

[0009] Technical Solution

[0010] In one technical aspect of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system is provided, the method comprising the following steps: receiving a location information request message including information about multiple quality of service (QoS) levels; and sending a location information message in response to the location information request message, wherein the location information message may include information about one QoS level among the multiple QoS levels and location information related to the one QoS level.

[0011] In another technical aspect of the present disclosure, a user equipment (UE) in a wireless communication system is provided, the UE comprising at least one transceiver, at least one processor, and at least one computer memory operably connectable to the at least one processor and storing instructions, wherein the instructions, when executed, enable the at least one processor to perform operations, the operations comprising: receiving a location information request message comprising information about a plurality of quality of service (QoS) levels; and sending a location information message in response to the location information request message, wherein the location information message may comprise information about one QoS level among the plurality of QoS levels and location information related to the one QoS level.

[0012] In another technical aspect of the present disclosure, a processing device in a wireless communication system is provided, the processing device including at least one processor and at least one computer memory operably connectable to the at least one processor and storing instructions, wherein the instructions, when executed, enable the at least one processor to perform operations for a user equipment (UE), the operations including: receiving a location information request message including information about a plurality of quality of service (QoS) levels; and sending a location information message in response to the location information request message, wherein the location information message may include information about one QoS level among the plurality of QoS levels and location information related to the one QoS level.

[0013] In another technical aspect of the present disclosure, a computer-readable storage medium is provided, which stores at least one program code including instructions, which, when executed, enable at least one processor to perform operations for a user equipment (UE), the operations including: receiving a location information request message including information about multiple quality of service (QoS) levels; and sending a location information message in response to the location information request message, wherein the location information message may include information about one QoS level among the multiple QoS levels and location information related to the one QoS level.

[0014] The multiple QoS levels may include a primary QoS level, an intermediate QoS level, and a minimum QoS level. In this case, the UE performs a first location measurement related to the primary QoS level. If successful, the UE sends a location information message including the result for the primary QoS level.

[0015] If the first location measurement fails, a second location measurement associated with the intermediate QoS level is performed. If successful, a location information message including the result for the second location measurement is sent.

[0016] Based on the failure of the second location measurement, a third location measurement associated with the minimum QoS level is performed. If successful, a location information message including a result for the third location measurement is sent.

[0017] The location information request message may include information about multiple location measurement methods related to multiple QoS levels. In this case, the UE may receive a message indicating at least one location measurement method among the multiple location measurement methods, and perform location measurement based on the indicated location measurement method and the QoS level related to the indicated location measurement method.

[0018] The above solutions are only some examples of the present disclosure, and those skilled in the art can deduce and understand various examples including the technical features of the present disclosure from the following detailed description.

[0019] Beneficial Effects

[0020] According to the present disclosure, wireless signal transmission and reception can be efficiently performed in a wireless communication system.

[0021] Those skilled in the art will appreciate that the effects that can be achieved using the present disclosure are not limited to those specifically described above, and other advantages of the present disclosure will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the present disclosure, and illustrate embodiments of the present disclosure and together with the description serve to explain the principle of the present disclosure:

[0023] Figure 1 is a diagram showing the structure of a New Radio (NR) system.

[0024] Figure 2 is a diagram showing the functional split between the Next Generation Radio Access Network (NG-RAN) and the 5th Generation Core Network (5GC).

[0025] Figure 3 The radio protocol architecture of the NR system is shown.

[0026] Figure 4 The radio frame structure in the NR system is shown.

[0027] Figure 5 A resource grid showing a time slot in an NR system.

[0028] Figure 6 An example of a communication system 1 to which an implementation of the present disclosure is applied is shown.

[0029] Figure 7 and Figure 8 A wireless device suitable for use with the present disclosure is shown.

[0030] Fig. 9 A vehicle or an autonomous driving vehicle to which the present disclosure is applied is shown.

[0031] Fig.10 The radio protocol architecture for sidelink (SL) communication is shown.

[0032] Fig.11 Shows the synchronization source or synchronization reference for Vehicle-to-Everything (V2X).

[0033] Fig.12 A process of performing V2X or SL communication by a user equipment (UE) according to a transmission mode is shown.

[0034] Fig.13 Three types of broadcasting in SL communication are shown.

[0035] Fig.14 An exemplary 5G system architecture that enables positioning for a UE connected to a Next Generation Radio Access Network (NG-RAN) or an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) is shown.

[0036] Fig.15 An example of a network implementation for measuring the location of a UE is shown.

[0037] Fig.16 Exemplary protocol layers for supporting Long Term Evolution (LTE) Positioning Protocol (LPP) messaging between a Location Management Function (LMF) and a UE are shown.

[0038] Fig.17 An exemplary protocol layer for supporting NR Positioning Protocol Appendix (NRPPa) protocol data unit (PDU) transmission between LMF and NG-RAN nodes is shown.

[0039] Fig.18 2 is a diagram for explaining an observed time difference of arrival (OTDOA) positioning method according to an embodiment of the present disclosure.

[0040] Fig.19 It is a signal flow diagram of the capability transmission process in the LPP process.

[0041] Fig. 20 and Fig.21 The positioning process based on the prior art when supporting multiple QoS levels is shown.

[0042] Fig. 22 The positioning process when supporting multiple QoS levels according to the first embodiment of the present disclosure is shown.

[0043] Fig.23 and Fig.24 The positioning process when supporting multiple QoS levels according to the second embodiment of the present disclosure is shown.

[0044] Fig.25 The positioning process when supporting multiple QoS levels according to the third embodiment of the present disclosure is shown.

[0045] Fig.26 is a flow chart illustrating a method of performing a positioning process with multiple QoS levels support according to the present disclosure. DETAILED DESCRIPTION

[0046] The technology described herein can be used for various wireless access systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Evolved UTRA (E-UTRA), etc. IEEE 802.16m is an evolution of IEEE 802.16e, providing backward compatibility with IRRR 802.16e-based systems. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using Evolved UTRA (E-UTRA). 3GPP LTE adopts OFDMA for downlink (DL) and SC-FDMA for uplink (UL). LTE-advanced (LTE-A) is an evolution of 3GPP LTE.

[0047] As more and more communication devices require greater communication capacity, there is an increasing demand for enhanced mobile broadband communications (eMBB) that are improved over current radio access technologies (RATs). In addition, large-scale machine-type communications (MTC) that connect numerous devices and objects to provide various services anytime and anywhere are also considered to be a key issue in next-generation communications. In addition, communication system designs that take into account services and / or UEs that are sensitive to reliability and latency are under discussion. The introduction of next-generation RATs such as eMBB, massive MTC, and ultra-reliable low-latency communications (URLLC) is under discussion. In this document, for ease of description, the corresponding technology will be referred to as new radio or new RAT (NR).

[0048] For the sake of clarity, the present disclosure mainly focuses on 3GPP NR, but the technical ideas of the present disclosure are not limited thereto.

[0049] In this specification, the term "setting / setting" may be replaced by the term "configuration", and the two terms may be used interchangeably. Conditional expressions (e.g., "if ...", "in the case of ...", or "when ...") may be replaced by "based on ..." or "under the state of ...". In addition, the operation and software / hardware (SW / HW) configuration of the user equipment / base station (UE / BS) may be derived / understood based on satisfying relevant conditions. If the processing of the receiving (or transmitting) side can be derived / understood from the processing of the transmitting (or receiving) side in the signal transmission / reception between wireless communication devices (e.g., BS, UE, etc.), its description may be omitted. For example, the signal determination / generation / encoding / transmission of the transmitting side may be understood as the signal monitoring reception / decoding / determination of the receiving side. When it is said that the UE performs (or does not perform) a specific operation, it may be interpreted as meaning that the BS expects / assumes (or does not expect / assume) that the UE will perform a specific operation. When it is said that the BS performs (or does not perform) a specific operation, it may be interpreted as meaning that the UE expects / assumes (or does not expect / assume) that the BS will perform a specific operation. In the following description, the classification and indexing of chapters, implementations, examples, options, methods, schemes, etc. are merely for convenience of description, but do not imply that each necessarily constitutes an independent disclosure or should be implemented separately. In addition, when describing various chapters, implementations, examples, options, methods, schemes, etc., if there is no clear conflict, it can be inferred or understood that at least some of the chapters, implementations, examples, options, methods, schemes, etc. can be implemented in combination or can be omitted in the implementation.

[0050] Figure 1 Shows the structure of the NR system.

[0051] Reference Figure 1, the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol terminations to the UE 10. For example, the BS 20 may include a next generation node B (gNB) and / or an evolved node B (eNB). The UE 10 may have a fixed or mobile nature. The UE 10 may be referred to as other terms, such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), or a wireless device. For example, the BS 20 may be a fixed station that communicates with the UE 10. The BS 10 may be referred to as other terms, such as a base station transceiver system (BTS), an access point, etc.

[0052] Figure 1 An example including only gNB is shown. BS20 may be connected to each other via an Xn interface. BS20 may be connected to a 5th generation core network (5GC) via an NG interface. Specifically, BS20 may be connected to an access and mobility management function (AMF) 30 via an NG-C interface and to a user plane function (UPF) 30 via an NG-U interface.

[0053] Figure 2 Showing the functional split between NG-RAN and 5GC.

[0054] Reference Figure 2 , gNB can provide functions including inter-cell radio resource management (RRM), radio admission control, measurement configuration and provision, and dynamic resource allocation. AMF can provide functions such as non-access stratum (NAS) security and idle state mobility processing. UPF can provide functions including mobility anchoring and protocol data unit (PDU) processing. Session management function (SMF) can provide functions including UE Internet Protocol (IP) address allocation and PDU session control.

[0055] Based on the lowest three layers of the open system interconnection (OSI) reference model known in communication systems, the radio protocol stack between the UE and the network can be divided into layer 1 (L1), layer 2 (L2), and layer 3 (L3). These layers are defined in pairs between the UE and the evolved UTRAN (E-UTRAN) for data transmission via the Uu interface. The physical (PHY) layer at L1 provides information transfer services on physical channels. The radio resource control (RRC) layer at L3 is used to control radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the eNB.

[0056] Figure 3 The radio protocol architecture of the NR system is shown. Specifically, Figure 3 (a) shows the user plane radio protocol architecture, Figure 3(b) shows the control plane radio protocol architecture. The user plane is a protocol stack for user data transmission, and the control plane is a protocol stack for control signal transmission.

[0057] Reference Figure 3 , the PHY layer provides information transfer services to its upper layer on the physical channel. The PHY layer is connected to the medium access control (MAC) layer through a transport channel, and data is transferred between the MAC layer and the PHY layer on the transport channel. The transport channel is divided according to the characteristics of data transmitted via the radio interface.

[0058] Data is transmitted on a physical channel between different PHY layers (ie, PHY layers of a transmitter and a receiver). The physical channel may be modulated by Orthogonal Frequency Division Multiplexing (OFDM) and use time and frequency as radio resources.

[0059] The MAC layer provides services to the upper layer (Radio Link Control (RLC)) on logical channels. The MAC layer provides the function of mapping from multiple logical channels to multiple transport channels. In addition, the MAC layer provides a logical channel multiplexing function by mapping multiple logical channels to a single transport channel. The MAC sublayer provides data transmission services on logical channels.

[0060] The RLC layer performs concatenation, segmentation, and reassembly for RLC service data units (SDUs). To ensure various quality of service (QoS) requirements for each radio bearer (RB), the RLC layer provides three operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0061] The RRC layer is defined only in the control plane and controls the logical channel, transport channel, and physical channel with respect to the configuration, reconfiguration, and release of RBs. RBs refer to logical paths provided by L1 (PHY layer) and L2 (MAC layer, RLC layer, and Packet Data Convergence Protocol (PDCP) layer) for data transmission between UE and the network.

[0062] The user plane functions of the PDCP layer include user data transmission, header compression and encryption. The control plane functions of the PDCP layer include control plane data transmission and encryption / integrity protection.

[0063] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs functions such as mapping between QoS flows and data radio bearers and marking QoS flow identifiers (IDs) within DL and UL packets.

[0064] RB establishment is equivalent to the process of defining radio protocol layers and channel characteristics and configuring specific parameters and operation methods in order to provide specific services. RBs can be classified into two types: signaling radio bearers (SRBs) and data radio bearers (DRBs). SRBs are used as a path for sending RRC messages on the control plane, while DRBs are used as a path for sending user data on the user plane.

[0065] Once an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is placed in the RRC_CONNECTED state, otherwise, the UE is placed in the RRC_IDLE state. In NR, the RRC_INACTIVE state is additionally defined. A UE in the RRC_INACTIVE state can maintain a connection with the core network while releasing a connection with the eNB.

[0066] The DL transport channels that carry data from the network to the UE include the broadcast channel (BCH) for sending system information and the DL shared channel (DL SCH) for sending user traffic or control messages. Traffic or control messages for DL ​​multicast or broadcast services can be sent on the DL-SCH or DL ​​multicast channel (DL MCH). The UL transport channels that carry data from the UE to the network include the random access channel (RACH) for sending initial control messages and the UL shared channel (UL SCH) for sending user traffic or control messages.

[0067] Logical channels above and mapped to the transport channels include the Broadcast Control Channel (BCCH), the Paging Control Channel (PCCH), the Common Control Channel (CCCH), the Multicast Control Channel (MCCH) and the Multicast Traffic Channel (MTCH).

[0068] A physical channel includes multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe includes multiple OFDM symbols in the time domain. An RB is a resource allocation unit defined by multiple OFDM symbols and multiple subcarriers. In addition, each subframe may use a specific subcarrier of a specific OFDM symbol (e.g., the first OFDM symbol) in a corresponding subframe for a physical DL control channel (PDCCH) (i.e., L1 / L2 control channel). A transmission time interval (TTI) is a unit time for subframe transmission.

[0069] Figure 4 The radio frame structure in the NR system is shown.

[0070] Reference Figure 4, a radio frame can be used for UL transmission and DL transmission in NR. The length of a radio frame is 10ms and can be defined by two 5ms half-frames. HF may include five 1ms subframes. A subframe may be divided into one or more slots, and the number of slots in a SF may be determined according to a subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each slot may include 12 or 14 OFDM (A) symbols. In the case of a normal CP (NCP), each slot may include 14 symbols, and in the case of an extended CP (ECP), each slot may include 12 symbols.

[0071] Table 1 below lists the number of symbols per time slot (N) according to the SCS configuration μ in the case of NCP. slot symb ), the number of time slots per frame (N frame,u slot ) and the number of time slots per subframe (N subframe,u slot ).

[0072] [Table 1]

[0073]

[0074]

[0075] Table 2 below lists the number of symbols per time slot (N) according to SCS in the case of ECP. slot symb ), the number of time slots per frame (N frame,u slot ) and the number of time slots per subframe (N subframe,u slot ).

[0076] [Table 2]

[0077] u <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 2 12 40 4

[0078] The structure of the frame is only an example. The number of subframes, the number of time slots, and the number of symbols in a frame may vary.

[0079] In the NR system, OFDM parameter sets (e.g., SCS) may be configured differently for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of a time resource (e.g., SF, time slot, or TTI) (referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently between aggregated cells. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0080] Figure 5A resource grid showing a time slot in an NR system.

[0081] Reference Figure 5 , a time slot includes multiple symbols in the time domain. For example, a time slot may include 14 symbols in the NCP case and 12 symbols in the ECP case. Alternatively, a time slot may include 7 symbols in the NCP case and 6 symbols in the ECP case. A carrier includes multiple subcarriers in the frequency domain. An RB may be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) may be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication may be performed in an enabled BWP. Only one BWP may be enabled for a UE. Each element may be referred to as a resource element (RE) in a resource grid to which a complex symbol may be mapped.

[0082] Figure 6 An example of a communication system 1 to which an implementation of the present disclosure is applied is shown.

[0083] Reference Figure 6 , the communication system 1 includes a wireless device, a base station (BS), and a network. The wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, a vehicle 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. The vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device, and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters.

[0084] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., V2V / V2X communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0085] Wireless communication / connection 150a, 150b or 150c may be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, wireless communication / connection may be established through various RATs (e.g., 5G NR) such as UL / DL communication 150a, side link communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device may send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b may send / receive signals through various physical channels. To this end, at least a portion of various configuration information for configuring processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes may be performed based on various proposals of the present disclosure.

[0086] Figure 7 A wireless device suitable for use with the present disclosure is shown.

[0087] Reference Figure 7 , the first wireless device 100 and the second wireless device 200 may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 6 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0088] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals 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. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0089] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and then store information obtained by processing the fourth information / signals 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. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0090] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0091] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document may be implemented in the form of codes, commands and / or command sets using firmware or software.

[0092] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions and / or commands. One or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0093] One or more transceivers 106 and 206 may send user data, control information and / or radio signals / channels mentioned in the method and / or operation flow chart of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information and / or radio signals / channels mentioned in the description, function, process, proposal, method and / or operation flow chart disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0094] Figure 8 Another example of a wireless device that can perform implementations of the present disclosure is shown. The wireless device can be based on the use case / service (see Figure 6 ) are implemented in various forms.

[0095] Reference Figure 8 , the wireless devices 100 and 200 may correspond to Figure 7The wireless devices 100 and 200 of the present invention may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Figure 7 One or more processors 102 and 202 and / or Figure 7 One or more memories 104 and 204. For example, the transceiver 114 may include FIG. Figure 7 One or more transceivers 106 and 206 and / or Figure 7 The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0096] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit (e.g., an audio I / O port, a video I / O port), a drive unit, and a computing unit. The wireless device may be configured in the form of, but not limited to, a robot ( Figure 6 100a), vehicles ( Figure 6 100b-1 and 100b-2), XR devices ( Figure 6 100c), handheld device ( Figure 6 100d), household appliances ( Figure 6 100e), IoT devices ( Figure 6 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 6 400), BS( Figure 6 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0097] exist Figure 8In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory unit 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0098] Fig. 9 A vehicle or an autonomous vehicle applied to the present disclosure is shown. The vehicle or the autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0099] Reference Fig. 9 , the vehicle or autonomous driving vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Figure 8 Block 110 / 130 / 140.

[0100] The communication unit 110 may send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a may enable the vehicle or autonomous vehicle 100 to travel on a road. The drive unit 140a may include an engine, a motor, a power system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100, and include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a depth sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously traveling along a determined path, a technology for traveling by automatically setting a path if a destination is set, and the like.

[0101] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the obtained data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically / periodically obtain the latest traffic information data from the external server and obtain surrounding traffic information data from neighboring vehicles. In the middle of autonomous driving, the sensor unit 140c may obtain vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly obtained data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data based on information collected from the vehicle or autonomous driving vehicle using AI technology, etc., and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0102] Now, V2X or SL communication will be described.

[0103] Fig.10 The radio protocol architecture for SL communication is shown. Specifically, Fig.10(a) shows the user plane protocol stack in NR, Fig.10 (b) shows the control plane protocol stack in NR.

[0104] Hereinafter, a side link synchronization signal (SLSS) and synchronization information will be described.

[0105] As a SL specific sequence, the SLSS may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS). The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS to detect an initial signal and obtain synchronization. In addition, the UE may use the S-PSS and the S-SSS to obtain detailed synchronization and detect a synchronization signal ID.

[0106] The physical sidelink broadcast channel (PSBCH) may be a (broadcast) channel for sending default (system) information that the UE needs to know first before SL signal transmission and reception. For example, the default information may include information related to SLSS, duplex mode (DM), time division duplex (TDD) UL / DL configuration, information related to resource pools, application types related to SLSS, subframe offsets, broadcast information, etc. For example, in order to evaluate the PSBCH performance in NR V2X, the payload size of the PSBCH may be 56 bits, including a 24-bit CRC.

[0107] The S-PSS, S-SSS, and PSBCH may be included in a block format (e.g., SL synchronization signal (SS) / PSBCH block) that supports periodic transmission (hereinafter, the SL SS / PSBCH block is referred to as a sidelink synchronization signal block (S-SSB)). The S-SSB may have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) on the carrier, and the transmission bandwidth may exist within a configured (or pre-configured) SLBWP. For example, the S-SSB may have a bandwidth of 11 RBs. For example, the PSBCH may span 11 RBs. In addition, the frequency position of the S-SSB may be (pre-)configured. Therefore, the UE does not need to perform hypothesis detection on the frequency to discover the S-SSB in the carrier.

[0108] Hereinafter, synchronization acquisition of SL UE will be described.

[0109] In TDMA systems and FDMA systems, accurate time and frequency synchronization is critical. If the time and frequency synchronization is not accurate, the system performance may degrade due to inter-symbol interference (ISI) and inter-carrier interference (ICI) between symbols and subcarriers. This also applies to V2X. In V2X, for time / frequency synchronization, SLSS can be used at the physical layer, and the Master Information Block-Side Link-V2X (MIB-SL-V2X) can be used at the Radio Link Control (RLC) layer.

[0110] Fig.11 Shows the synchronization source or synchronization reference for V2X.

[0111] Reference Fig.11 In V2X, the UE can synchronize directly with the Global Navigation Satellite System (GNSS). Alternatively, the UE can synchronize indirectly with the GNSS through another UE (in or outside the network coverage). If GNSS is configured as the synchronization source, the UE can calculate the direct frame number (DFN) and subframe number using the Coordinated Universal Time (UTC) and the (pre-)configured DFN offset.

[0112] Alternatively, the UE may be synchronized directly with the BS, or may be synchronized with another UE that is synchronized with the BS in time / frequency. For example, the BS may be an eNB or a gNB. For example, when the UE is within the network coverage, the UE may receive synchronization information provided by the BS and may be synchronized directly with the BS. Next, the UE may provide synchronization information to another neighboring UE. If the timing of the BS is configured as a synchronization reference, the UE may follow the cell associated with the corresponding frequency (when the UE is within the cell coverage in frequency) or the primary cell or serving cell (when the UE is outside the cell coverage in frequency) for synchronization and DL measurements.

[0113] The BS (e.g., serving cell) may provide a synchronization configuration for the carrier used for V2X / SL communication. In this case, the UE may follow the synchronization configuration received from the BS. If the UE fails to detect any cell in the carrier used for V2X / SL communication and fails to receive a synchronization configuration from the serving cell, the UE may follow the preset synchronization configuration.

[0114] Alternatively, the UE may be synchronized with another UE that fails to directly or indirectly acquire synchronization information from the BS or GNSS. The synchronization source and preference may be preconfigured for the UE. Alternatively, the synchronization source and preference may be configured through a control message provided by the BS.

[0115] It may be (pre-)configured whether GNSS based synchronization or BS based synchronization is used.In single carrier operation, the UE may derive the UE's transmission timing from the available synchronization reference having the highest priority.

[0116] For example, the UE may select (or reselect) a synchronization reference and obtain synchronization from the synchronization reference. In addition, the UE may perform SL communication (e.g., PSCCH / PSSCH transmission and reception, physical sidelink feedback channel (PSFCH) transmission and reception, S-SSB transmission and reception, reference signal transmission and reception, etc.) based on the acquired synchronization.

[0117] Fig.12 The process of UE performing V2X or SL communication according to the transmission mode is shown. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. For the convenience of the following description, the transmission mode in LTE may be referred to as the LTE transmission mode, and the transmission mode in NR may be referred to as the NR resource allocation mode.

[0118] For example, Fig.12 (a) shows UE operation related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Fig.12 (a) shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to general SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0119] For example, Fig.12 (b) shows UE operation related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Fig.12 (b) shows UE operation related to NR resource allocation mode 2.

[0120] Reference Fig.12 (a), in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS may schedule SL resources to be used for SL transmission of the UE. For example, in step S8000, the BS may send information related to SL resources and / or information related to UE resources to the first UE. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources for reporting SL HARQ feedback to the BS.

[0121] For example, the first UE may receive information related to dynamic grant (DG) resources and / or information related to configuration grant (CG) resources from the BS. For example, the CG resources may include CG type 1 resources or CG type 2 resources. In the present specification, the DG resources may be resources that the BS configures / allocates to the first UE via downlink control information (DCI). In the present specification, the CG resources may be (periodic) resources that the BS configures / allocates to the first UE via DCI and / or RRC messages. For example, in the case of CG type 1 resources, the BS may send an RRC message including information related to the CG resources to the first UE. For example, in the case of CG type 2 resources, the BS may send an RRC message including information related to the CG resources to the first UE, and the BS may send a DCI related to the activation or release of the CG resources to the first UE.

[0122] In step S8010, the first UE may send a PSCCH (e.g., sidelink control information (SCI) or level 1 SCI) to the second UE based on resource scheduling. In step S8020, the first UE may send a PSSCH related to the PSCCH to the second UE (e.g., level 2 SCI, MAC PDU, data, etc.). In step S8030, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., negative acknowledgement (NACK) information or acknowledgement (ACK) information) may be received from the second UE via the PSFCH. In step S8040, the first UE may send / report the HARQ feedback information to the BS via the PUCCH or PUSCH. For example, the HARQ feedback information reported to the BS may include information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the BS may include information generated by the first UE based on a preset rule. For example, the DCI may be a DCI for scheduling the SL. For example, the format of the DCI may include DCI format 3_0 or DCI format 3_1.

[0123] Reference Fig.12(b), in LTE transmission mode 2, LTE transmission mode 4 or NR resource allocation mode 2, the UE may determine the SL transmission resources within the SL resources configured by the BS / network or the pre-configured SL resources. For example, the configured SL resources or the pre-configured SL resources may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by selecting resources by itself within the configured resource pool. For example, the UE may perform a sensing and resource selection (reselection) process to select resources by itself within a selection window. For example, sensing may be performed in units of subchannels. For example, in step S8010, the first UE that has self-selected resources in the resource pool may use the resources to send a PSCCH (e.g., sidelink control information (SCI) or level 1 SCI) to a second UE. In step S8020, the first UE may send a PSSCH related to the PSCCH (e.g., level 2 SCI, MAC PDU, data, etc.) to the second UE. In step S8030, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0124] Reference Fig.12 (a) or Fig.12 (b), for example, the first UE may send SCI to the second UE on the PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., two-level SCIs) to the second UE on the PSCCH and / or PSSCH. In this case, the second UE may decode the two consecutive SCIs (e.g., two-level SCIs) to receive the PSSCH from the first UE. In this specification, the SCI sent on the PSCCH may be referred to as the 1st SCI, the 1st level SCI, or the 1st level SCI format, and the SCI sent on the PSSCH may be referred to as the 2nd SCI, the 2nd SCI, or the 2nd level SCI format. For example, the 1st level SCI format may include SCI format 1-A, and the 2nd level SCI format may include SCI format 2-A and / or SCI format 2-B.

[0125] Reference Fig.12 (a) or Fig.12 (b), in step S8030, the first UE may receive the PSFCH. For example, the first UE and the second UE may determine the PSFCH resource, and the second UE may send HARQ feedback to the first UE on the PSFCH resource.

[0126] Reference Fig.12 (a), in step S8040, the first UE may send SL HARQ feedback to the BS via PUCCH and / or PUSCH.

[0127] Fig.13 Three types of broadcasting in SL communication are shown.

[0128] Specifically, Fig.13 (a) shows broadcast type SL communication, Fig.13 (b) shows unicast type SL communication, Fig.13 (c) shows multicast SL communication. In the case of unicast SL communication, the UE can perform one-to-one communication with other UEs. In the case of multicast SL communication, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL multicast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0129] The hybrid automatic repeat request (HARQ) process will be described below.

[0130] For example, SL HARQ feedback may be enabled for unicast. In this case, in non-code block group (non-CBG) operation, when the receiving UE decodes the PSCCH directed to it and successfully decodes the transport block (TB) related to the PSCCH, the receiving UE may generate a HARQ-ACK. The receiving UE may send a HARQ-ACK to the transmitting UE. Conversely, when the receiving UE fails to decode the TB related to the PSCCH after decoding the PSCCH directed to it, the receiving UE may generate a HARQ-NACK. The receiving UE may send a HARQ-NACK to the transmitting UE.

[0131] For example, SL HARQ feedback may be enabled for multicast. For example, in non-CBG operation, two HARQ feedback options may be supported for multicast.

[0132] (1) Multicast Option 1: When the receiving UE fails to decode the TB related to the PSCCH directed to it after decoding the PSCCH, the receiving UE may send HARQ-NACK to the transmitting UE through the PSFCH. Conversely, when the receiving UE decodes the PSCCH directed to it and successfully decodes the TB related to the PSCCH, the receiving UE may not send HARQ-ACK to the transmitting UE.

[0133] (2) Multicast Option 2: When the receiving UE fails to decode the TB related to the PSCCH directed to it after decoding the PSCCH, the receiving UE may send HARQ-NACK to the transmitting UE through the PSFCH. Conversely, when the receiving UE decodes the PSCCH directed to it and successfully decodes the TB related to the PSCCH, the receiving UE may send HARQ-ACK to the transmitting UE through the PSFCH.

[0134] For example, when multicast option 1 is used for SL HARQ feedback, all UEs performing multicast communication may share PSFCH resources. For example, UEs belonging to the same group may use the same PSFCH resources to send HARQ feedback.

[0135] For example, when multicast option 2 is used for SL HARQ feedback, each UE performing multicast communication may use different PSFCH resources for HARQ feedback transmission. For example, UEs belonging to the same group may use different PSFCH resources to send HARQ feedback.

[0136] In the present disclosure, HARQ-ACK may be referred to as ACK, ACK information, or positive ACK information, and HARQ-NACK may be referred to as NACK, NACK information, or negative ACK information.

[0137] <Positioning>

[0138] Fig.14 An exemplary 5G system architecture that enables positioning for a UE connected to an NG-RAN or E-UTRAN is shown.

[0139] Reference Fig.14 , the AMF may receive a request for location services related to a specific target UE from other entities such as a Gateway Mobile Location Center (GMLC). Alternatively, the AMF may autonomously determine to initiate location services on behalf of a specific target UE. Thereafter, the AMF may send a location service request to a location management function (LMF). Upon receiving the location service request, the LMF may process the location service request and return a processing result including the estimated UE location to the AMF. When the LMF receives a location service request from another entity other than the AMF (e.g., GMLC), the AMF may forward the processing result received from the LMF to the other entity.

[0140] Next-generation evolved Node B (ng-eNB) and gNB are network elements of NG-RAN that can provide measurement results for location estimation. ng-eNB and gNB can measure radio signals for target UEs and send the results to LMF. In addition, ng-eNB can control specific transmission points (TPs), such as remote radio heads or positioning reference signal dedicated (PRS dedicated) TPs for E-UTRA, which support PRS-based beacon systems.

[0141] The LMF is connected to an Enhanced Serving Mobile Location Center (E-SMLC), which enables the LMF to access E-UTRAN. For example, the E-SMLC enables the LMF to use DL measurements obtained by the target UE through signals sent by eNBs and / or PRS TPs only in E-UTRAN to support Observed Time Difference of Arrival (OTDOA), which is one of the positioning methods of E-UTRAN.

[0142] The LMF may be connected to a SUPL Location Platform (SLP). The LMF may support and manage different location services for the target UE. The LMF may interact with a serving ng-eNB or a serving gNB for the target UE in order to obtain location measurements of the UE. For positioning of the target UE, the LMF may determine positioning methods based on the location service (LCS) client type, required quality of service (QoS), UE positioning capabilities, gNB positioning capabilities, and ng-eNB positioning capabilities, and then apply these positioning methods to the serving gNB and / or serving ng-eNB. The LMF may determine additional information, such as the accuracy of the position estimate and the speed of the target UE. The SLP is the Secure User Plane Location (SUPL) entity responsible for positioning via the user plane.

[0143] The UE may measure DL signals through various sources such as NG-RAN and E-UTRAN, different global navigation satellite systems (GNSS), terrestrial beacon systems (TBS), WLAN wireless local area network (WLAN) access points, Bluetooth beacons, and UE atmospheric pressure sensors. The UE may include an LCS application, or the UE may be connected to the LCS application through communication with a connected network or through other applications integrated into the UE. The LCS application may include measurement and calculation functions required to determine the UE position. For example, the UE may include an independent positioning function such as a global positioning system (GPS), so that the UE can report its position independently of the NG-RAN transmission. The independently acquired location information may also be used as supplementary information to the positioning information obtained from the network.

[0144] Fig.15 An example of a network implementation for measuring the UE position is shown.

[0145] When the UE is in the Connection Management Idle (CM-IDLE) state, if the AMF receives a location service request, the AMF may establish a signaling connection with the UE and request the network to trigger the service to assign a specific serving gNB or ng-eNB. Fig.15 The above operation process is not shown in FIG. Fig.15 In the present embodiment, it is assumed that the UE is in connected mode. However, while the positioning process is in progress, the NG-RAN may release the signaling connection due to signaling and data inactivity.

[0146] Reference Fig.15 , the network operation processing for measuring the UE location will be described in detail. In step 1a, a 5GC entity such as a GMLC may send a location service request to a serving AMF to measure the location of a target UE. However, even if the GMLC does not request a location service, the serving AMF may determine in step 1b that a location service is required to measure the location of the target UE. For example, the serving AMF may autonomously determine to provide a location service to measure the UE location for an emergency call.

[0147] Thereafter, in step 2, the AMF forwards the location service request to the LMF. In step 3a, the LMF may initiate a location procedure with the serving ng-eNB and the serving gNB to obtain positioning data or positioning assistance data. Additionally, in step 3b, the LMF may initiate a location procedure for DL ​​positioning with the UE. For example, the LMF may send location assistance data (e.g., assistance data defined in 3GPP TS 36.355) to the UE or obtain a location estimate or location measurement. Step 3b may be performed in addition to step 3a, or step 3b may be performed instead of step 3a.

[0148] In step 4, the LMF may provide a location service response to the AMF. The location service response may include information on whether the UE location is successfully estimated and the estimated UE location. Fig.15 If the process is initiated through step 1b, the AMF may forward the location service response to the 5GC entity (e.g., GMLC). Fig.15 process, the AMF can use the location service response to provide location services related to emergency calls, etc.

[0149] Fig.16 Exemplary protocol layers for supporting LTE Positioning Protocol (LPP) messaging between an LMF and a UE are shown.

[0150] LPP PDUs can be sent in NAS PDUs between AMF and UE. Fig.16 , LPP may terminate between a target device (e.g., a UE in the control plane or a SUPL enabled terminal (SET) in the user plane) and a location server (e.g., a LMF in the control plane or a SUPL location platform (SLP) in the user plane). LPP messages may be transmitted in a transparent PDU format over an intermediate network interface using an appropriate protocol, such as the Next Generation Application Protocol (NGAP) via the Next Generation Control Plane (NG-C) interface, NAS / RRC via the LTE-Uu and NR-Uu interfaces. LPP enables both NR and LTE to be positioned by employing various positioning methods.

[0151] For example, the target device and the location server may exchange capability information, assistance data for positioning, and / or location information between them through LPP. The target device and the location server may exchange error information and / or indicate termination of the LPP process through LPP messages.

[0152] Fig.17 An exemplary protocol layer for supporting NR Positioning Protocol Appendix (NRPPa) PDU transmission between LMF and NG-RAN nodes is shown.

[0153] NRPPa can be used for information exchange between NG-RAN nodes and LMF. Specifically, NRPPa can exchange enhanced cell IDs (E-CIDs) for measurement sent from ng-eNB to LMF, data supporting OTDOA positioning methods, and cell IDs and cell location IDs for NR cell ID positioning methods. Even if there is no information about the relevant NRPPa transactions, the AMF can route NRPPa PDUs based on the routing IDs of the LMFs involved via the NG-C interface.

[0154] The NRPPa procedures for location and data collection can be divided into two types. The first type is a UE-related procedure, which involves the transmission of information about a specific UE (e.g., location measurement data). The second type is a non-UE-related procedure, which involves the transmission of information applicable to NG-RAN nodes and related TPs (e.g., gNB / ng-eNB / TP timing information). These two types of procedures can be supported independently or simultaneously.

[0155] <Positioning method>

[0156] NG-RAN may support the following positioning methods: GNSS, OTDOA, E-CID, air pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS, uplink time difference of arrival (UTDOA), etc. Although any one of these positioning methods may be used for UE positioning, two or more positioning methods may be used for UE positioning.

[0157] (1) Observed Time Difference of Arrival (OTDOA)

[0158] Fig.18 It is a diagram for explaining an OTDOA positioning method according to an embodiment of the present disclosure.

[0159] The OTDOA positioning method uses the time measured by the UE for DL ​​signals received from multiple TPs including eNB, ng-eNB, and PRS-only TPs. The UE uses the location assistance data received from the location server to measure the time of the received DL signals. The location of the UE can be determined based on such measurement results and the geographic coordinates of neighboring TPs.

[0160] A UE connected to a gNB may request a measurement gap to perform OTDOA measurements from a TP. If the UE does not know the SFN of at least one TP in the OTDOA assistance data, the UE may use autonomous gaps to obtain the SFN of the OTDOA reference cell before requesting a measurement gap for performing reference signal time difference (RSTD) measurements.

[0161] Here, RSTD may be defined as the minimum relative time difference between two subframe boundaries received from the reference cell and the measurement cell. That is, RSTD may be calculated as the relative time difference between the start time of the subframe received from the measurement cell and the start time of the subframe from the reference cell that is closest to the subframe received from the measurement cell. The reference cell may be selected by the UE.

[0162] For accurate OTDOA measurement, it is necessary to measure the time of arrival (ToA) of signals received from three or more TPs or BSs distributed geographically. For example, the ToA of each of TP 1, TP 2, and TP 3 may be measured, and the RSTD of TP 1 and TP 2, the RSTD of TP 2 and TP 3, and the RSTD of TP 3 and TP 1 may be calculated based on the three ToA values. A geometric hyperbola is determined based on the calculated RSTD values, and the point where the hyperbola intersects may be estimated as the position of the UE. In this case, the accuracy and / or uncertainty of each ToA measurement may occur, and according to the measurement uncertainty, the estimated position of the UE may be referred to as a specific range.

[0163] (2) E-CID (Enhanced Cell ID)

[0164] In the cell ID (CID) positioning method, the location of the UE can be measured based on the geographic information of the UE's serving ng-eNB, serving gNB and / or serving cell. For example, the geographic information of the serving ng-eNB, serving gNB and / or serving cell can be obtained through paging, registration, etc.

[0165] In addition to the CID positioning method, the E-CID positioning method may also use additional UE measurements and / or NG-RAN radio resources to improve the UE position estimate. Although the E-CID positioning method may partially utilize the same measurement method as the measurement control system on the RRC protocol, additional measurements only for UE position measurement are generally not performed. In other words, no additional measurement configuration or measurement control message is provided for UE position measurement. The UE is not expected to request additional measurement operations only for position measurement, and the UE may report measurement values ​​obtained by a generally measurable method.

[0166] (3) Uplink Time Difference of Arrival (UTDOA)

[0167] UTDOA is a method of determining the UE position by estimating the arrival time of a sounding reference signal (SRS). When calculating the estimated SRS arrival time, the serving cell can be used as a reference cell to estimate the UE position based on the arrival time difference relative to another cell (or BS / TP). To implement UTDOA, the E-SMLC can indicate the serving cell of the target UE and then instruct the target UE to perform SRS transmission. In addition, the E-SMLC can provide the following configurations: periodic / aperiodic SRS, bandwidth, and frequency / group / sequence hopping.

[0168] <Positioning related standards>

[0169] The location request is specified in the 3GPP standard document TS23.273 and is classified into a Network Induced Location Request (NI-LR), a Mobile Terminated Location Request (MT-LR), a Mobile Originated Location Request (MO-LR), an Immediate Location Request, a Deferred Location Request, and the like.

[0170] In addition, in positioning, the target UE and LMF communicate with each other using the LTE Positioning Protocol (LPP) specified in the 3GPP standard document TS 37.355. The NR base station and LMF communicate with each other using the 3GPP standard document TS 38.455NR Positioning Protocol Annex (NRPPa), and the LTE base station and LMF communicate with each other using the LTE Positioning Protocol Annex (LPPa) specified in the 3GPP standard document TS 36.455.

[0171] <LTE Positioning Protocol (LPP) Process of Position Computation Entity>

[0172] As mentioned above, the 3GPP TS 37.355 document describes the LTE Positioning Protocol (LPP) procedures for the Position Computation Entity.

[0173] Fig.19 It is a signal flow diagram of the capability transmission process in the LPP process.

[0174] Specifically, through the capability transfer procedure specified in TS 37.355, targets (eg, UE and server) exchange capability information (capabilities) with each other. The server sends a RequestCapabilities message to the target, and the target responds with a ProvideCapabilities message.

[0175] In the RequestCapabilities message, the capability of sending each supported positioning method is defined. The target sends information about its own capabilities to the server through the ProvideCapabilities message based on the positioning methods supported in the received RequestCapabilities message.

[0176] In the corresponding ProvideCapabilities message, the DL-TDoA method and the DL-AoD method include a positioning mode IE. The positioning mode IE includes whether UE-based or UE-assisted is supported.

[0177] The server provides various information required for each positioning method through the ProvideAssistanceData message.

[0178] The IE of the DL-TDoA and DL-AoD methods includes the NR-PositionCalculationAssistance IE, and the NR-PositionCalculationAssistance IE includes information for UE-based positioning. The target can perform UE-based positioning using the received information.

[0179] The server can start the positioning of the target by forwarding the RequestLocationInformation message. The RequestLocationInformation message includes a LocationInformationType IE. The LocationInformationType IE indicates whether it is a measurement result value (NW-based positioning) or a calculated location (UE-based positioning).

[0180] After positioning measurements, the target informs the server of the result value through the ProvideLocationInformation message. The NR DL-TDoA method and the DL-AoD method include a LocationCoordinates IE in the ProvideLocationInformation message. In the case of UE-based positioning, the calculated location value is loaded into the corresponding IE and sent.

[0181] <SL positioning>

[0182] The NR positioning discussed in 3GPP NR Release 17 only supports network-based Uu positioning and does not support positioning using SL communication. However, it is planned to support SL positioning in 3GPP NR Release 18.

[0183] Uu positioning is a traditional method for position estimation under the connection between the target UE and the BS (gNB / LMF), but SL positioning is a new method for position estimation based on the connection between the target UE and one or more anchor UE.

[0184] To determine the anchor UE in SL positioning, the following process is currently under discussion.

[0185] 1) Through the discovery search process, the target UE exchanges UE capability information with surrounding UEs capable of SL communication (hereinafter referred to as candidate UEs) through SL communication. In this case, basic information such as whether the discovered UE supports SL positioning is exchanged. The anchor UE is determined only when the corresponding UE supports SL positioning.

[0186] 2) After exchanging basic information, the target UE and candidate UEs determine the final anchor UE through negotiation. When negotiation is performed for SL positioning, the anchor UE can be determined only if the request to act as an anchor UE is not rejected during the negotiation process.

[0187] 3) In addition, the anchor UE provides the target UE with information on whether the anchor UE is able to determine its position. The anchor UE can perform absolute positioning only when the anchor UE already knows its position or when the anchor UE is able to measure its position based on Uu positioning.

[0188] <Sidelink Positioning Protocol (SLPP)>

[0189] As described above, the Uu positioning of the prior art uses the LPP protocol, and the LPP session is a one-to-one (point-to-point) communication protocol between the target UE and the LMF. Through the LPP protocol, the target UE receives the information required for positioning through the LMF. The LMF configures the target UE and the base station (gNB) through the LPP protocol and the NRPPa protocol, and allows the positioning operation to be performed. Therefore, the positioning operation in the physical layer performs position measurement through the PRS / SRS with the target UE and the base station (gNB).

[0190] On the other hand, in the sidelink positioning of Release 18, the base station performs a positioning operation by exchanging positioning reference signals with anchor UEs around the target UE.

[0191] In the Sidelink Positioning Protocol (SLPP), a session is established between a target UE and an anchor UE. Here, since the number and required capabilities of the required anchor UEs may vary depending on the positioning method, service purpose, etc., SLPP should support a one-to-many (point-to-multipoint) communication protocol.

[0192] <Positioning Protocol Session>

[0193] An LPP session is used between a location server and a target device to obtain location related measurements or a position estimate or to send supporting data.

[0194] The LPP session uses a one-to-one (point-to-point) communication system between the target UE and the LMF.

[0195] And separate the existing data communication process from the positioning process. In addition, the LPP protocol operates independently, regardless of the RAT and positioning method. That is, the LPP protocol can support all RATs and positioning methods. Currently supports OTDOA (based on LTE signals), A-GNSS, E-CID (based on LTE signals), sensors, TBS, WLAN, Bluetooth, NR E-CID, NR DL-TDOA, NR DL-AoD, NR multi-RTT, etc.

[0196] Usually, one LPP session corresponds to one location request occurring in the LCS client. If there are multiple location requests, multiple LPP sessions are created.

[0197] Each LPP session includes multiple LPP transactions, and one LPP transaction corresponds to one LPP process. Generally, LPP transactions can be sequential or simultaneous. In addition, each LPP transaction is identified by a transaction ID.

[0198] <QoS during positioning>

[0199] Initially configured in the QoS level Location Request (LR) step of the Location Service (LCS). Multiple QoS levels can be configured, but this is limited to the deferred 5GC-MT Location Request processing.

[0200] The QoS level configured above is forwarded through the LPP location information transmission process. Here, the LPP location information transmission process consists of a RequestLocationInformation message and a ProvideLocationInformation message.

[0201] Specifically, RequestLocationInformation includes CommonIEsRequestLocationInformation IE, and CommonIEsRequestLocationInformation IE includes QoS IE, as shown in Table 3 below.

[0202] [Table 3]

[0203]

[0204] In addition, ProvideLocationInformation includes CommonIEsProvideLocationInformation IE, and CommonIEsProvideLocationInformation IE includes QoS IE, as shown in Table 4 below.

[0205] [Table 4]

[0206]

[0207] In addition, QoS IE is defined as shown in Table 5 below.

[0208] [Table 5]

[0209]

[0210] Referring to Table 3 and Table 4, QoS is defined in a common information structure and can be set to only a single value. That is, the current structure can configure only one QoS in one message. In addition, due to these structural limitations, it is difficult to configure QoS for each positioning method.

[0211] Therefore, it is necessary to send a RequestLocationInformation message for QoS change and go through the LPP location information delivery process.

[0212] Therefore, as many LPP location information transmission processes as the number of the multiple QoS levels are required to support the multiple QoS levels.

[0213] In addition, when performing a positioning operation while changing a positioning method, LPP location information transmission processing should be performed based on QoS levels configured differently for each positioning method. When performing a positioning operation due to a change in a positioning method, a delay occurs due to multiple signaling in the current structure.

[0214] Fig. 20 and Fig.21 The following illustrates a positioning process when multiple QoS levels are supported based on the prior art.

[0215] Reference Fig. 20 , it can be seen that a total of three LPP location information transmission processes are performed for all main QoS levels, intermediate QoS levels, and minimum QoS levels to perform the positioning process.

[0216] Next, refer to Fig.21 , the positioning methods of multi-RTT, DL-AoD and DL-TDoA are applied sequentially to perform LPP position information transmission processing (ie, positioning process). If each positioning method requires a different QoS level, repeated QoS IE provision processing is required.

[0217] That is, in the current structure where multiple QoS levels cannot be configured, delays due to multiple signaling occur. Therefore, it is necessary to change the current QoS structure to facilitate rapid positioning.

[0218] Although the names and structures of the procedures and IEs mentioned below are basically based on LPP, they can also be replaced with the names and structures of procedures and IEs performing the same / similar functions regardless of the names in SLPP for SL positioning.

[0219] <First Embodiment>

[0220] In the first embodiment of the present disclosure, a QoS IE (Information Element) structure for supporting multiple QoS levels is proposed, which can effectively use multiple QoS in addition to a structure for configuring a single QoS.

[0221] Through the method proposed in the first embodiment of the present disclosure, multiple QoS parameters can be transmitted as one message. Therefore, signaling overhead can be reduced and delay can be reduced.

[0222] The QoS structure proposed by the first embodiment of the present disclosure is shown in the following Table 6. The number of QoS levels in Table 6 is three, and a primary QoS level, an intermediate QoS level, and a minimum QoS level are described, but the number and names of the QoS levels are only examples.

[0223] [Table 6]

[0224]

[0225] Referring to Table 6, it can be seen that a total of three QoS levels are defined in one QoS IE.

[0226] Fig. 22 The positioning process when supporting multiple QoS levels according to the first embodiment of the present disclosure is shown.

[0227] Reference Fig. 22 , a total of three QoS levels are provided in the RequestLocationInformation message during one LPP location information transfer transaction.

[0228] Information reflecting all three QoS levels may also be provided in response thereto.

[0229] Alternatively, when the positioning corresponding to the main QoS level is successful, ProvideLocationInformation may include the positioning result corresponding to the main QoS level. However, when the positioning corresponding to the main QoS level fails, the positioning corresponding to the intermediate QoS level is performed. When the positioning corresponding to the intermediate QoS level is successful, ProvideLocationInformation may include the positioning result corresponding to the intermediate QoS level. Similarly, when the positioning corresponding to the intermediate QoS level fails, the positioning corresponding to the minimum QoS level is performed. When the positioning corresponding to the minimum QoS level is successful, ProvideLocationInformation may include the positioning result corresponding to the minimum QoS level.

[0230] Fig. 22 It is configured based on LPP messages, but applies to both LPP messages and SLPP messages. In this case, Fig.21 The location server may be an anchor UE at a sidelink location.

[0231] In addition, QoS is described as an example in the first embodiment of the present disclosure, which may be extended to all IEs included in CommonIEsRequestLocationInformation and CommonIEsProvideLocationInformation.

[0232] <Second Embodiment>

[0233] The second embodiment of the present disclosure proposes a QoS IE (Information Element) structure that supports association between multiple QoS levels and positioning methods.

[0234] Through the method proposed in the second embodiment of the present disclosure, multiple QoS parameters can be transmitted as one message. Therefore, signaling overhead can be reduced and delay can be reduced.

[0235] Table 7 below shows the QoS structure supporting association between multiple QoS levels and positioning methods proposed in the second embodiment of the present disclosure.

[0236] [Table 7]

[0237]

[0238] The number of QoS levels in Table 7 is three, and describes the main QoS level, the intermediate QoS level, and the minimum QoS level, but the number and name of the QoS level are only examples. For example, a total of four QoS levels may be included in the QoS IE shown in Table 8 below, and the names of the QoS levels may be respectively called QoS1 to QoS4, and each QoS level may include associated positioning method information.

[0239] [Table 8]

[0240]

[0241] The QoS IE of Table 7 and Table 8 may also include the PositioningMethod IE shown in the following Table 9 for positioning method specification.

[0242] [Table 9]

[0243]

[0244] Referring to Tables 7 to 9 above, in the second embodiment of the present disclosure, multiple QoS levels are configured in the QoS IE, but an IE indicating a positioning method may also be defined in each QoS level IE, thereby associating the QoS level with the positioning method.

[0245] Fig.23 and Fig.24 The positioning process when supporting multiple QoS levels according to the second embodiment of the present disclosure is shown.

[0246] First, refer to Fig.23 , a total of three QoS levels and corresponding positioning methods are provided in the RequestLocationInformation message during one LPP location information delivery process.

[0247] In response, ProvideLocationInformation may provide information reflecting all three QoS levels.

[0248] Alternatively, when positioning is successful using a positioning method corresponding to the primary QoS level, ProvideLocationInformation may include a positioning result corresponding to the primary QoS level.

[0249] However, when positioning fails with the positioning method corresponding to the primary QoS level, positioning is performed with the positioning method corresponding to the intermediate QoS level. If positioning is successful with the positioning method corresponding to the intermediate QoS level, ProvideLocationInformation may include the positioning result corresponding to the intermediate QoS level.

[0250] Likewise, when positioning fails with a positioning method corresponding to an intermediate QoS level, positioning is performed with a positioning method corresponding to a minimum QoS level. When positioning succeeds with a positioning method corresponding to a minimum QoS level, ProvideLocationInformation may include a positioning result corresponding to the minimum QoS level.

[0251] Next, refer to Fig.24 , it can be seen that the QoS level information of each positioning method is provided in RequestLocationInformation and commonRequestLocationInformation. In particular, the positioning method NR-ECID corresponds to QoS1, the positioning method multi-RTT corresponds to QoS2, the positioning method DL-AoD corresponds to QoS3, and the positioning method DL-TDoA corresponds to QoS4.

[0252] The location server may perform a positioning operation through a specific positioning method, and may provide a positioning operation result therefor through ProvideLocationInformation.

[0253] For example, if positioning is successful with the NR-ECID associated with QoS1, ProvideLocationInformation may include the positioning result corresponding to the NR-ECID.

[0254] However, when positioning with the NR-ECID associated with QoS 1 fails, positioning is performed with multi-RTT associated with QoS 2. When positioning with multi-RTT associated with QoS 2 succeeds, ProvideLocationInformation may include a positioning result corresponding to the multi-RTT.

[0255] Likewise, when multi-RTT positioning associated with QoS 2 fails, positioning is performed with DL-AoD associated with QoS 3. When positioning with DL-AoD associated with QoS 3 succeeds, ProvideLocationInformation may include a positioning result corresponding to the DL-AoD.

[0256] Finally, when positioning with DL-AoD associated with QoS 3 fails, positioning is performed with DL-TDoA associated with QoS 4. When positioning with DL-TDoA associated with QoS 4 succeeds, ProviderLocationInformation may include a positioning result corresponding to DL-TDoA.

[0257] The positioning method may be selectively applied according to an instruction, and the start of the positioning operation including the positioning method instruction may be replaced with signaling sent from a lower layer instead of an LPP / SLPP message.

[0258] Fig.23 and Fig.24 It is configured based on LPP messages, but applies to both LPP messages and SLPP messages. In this case, Fig.23 and Fig.24 The location server can be the anchor UE in the sidelink positioning.

[0259] In addition, QoS is described as an example in the second embodiment of the present disclosure. This can be extended to be applicable to all IEs included in CommonIEsRequestLocationInformation and CommonIEsProvideLocationInformation.

[0260] <Third Embodiment>

[0261] The third embodiment of the present disclosure proposes a location message structure that supports association between multiple QoS levels and positioning methods.

[0262] In the case of the first and second embodiments, in order to support the association between multiple QoS levels and positioning methods, multiple QoS levels are defined in the QoS IE, and the association of positioning methods is defined. On the other hand, in the case of the third embodiment of the present disclosure, the location message itself is improved to support the association between multiple QoS levels and positioning methods.

[0263] Specifically, the location message includes RequestLocationInformation and ProvideLocationInformation. In the third embodiment of the present disclosure, it is proposed to configure RequestLocationInformation in Table 3 as shown in Table 10 below and to configure ProvideLocationInformation in Table 4 as shown in Table 11 below.

[0264] [Table 10]

[0265]

[0266] [Table 11]

[0267]

[0268] The QoS IEs of Table 10 and Table 11 follow the configuration of Table 5.

[0269] Referring to Table 10 and Table 11, QoS is independently configured for each positioning method, and based on this, independent application of QoS for each positioning can be achieved by providing RequestLocationInformation only once and receiving ProviderLocationInformation.

[0270] Fig.25 The positioning process when supporting multiple QoS levels according to the third embodiment of the present disclosure is shown.

[0271] Reference Fig.25 , QoS information of each positioning method is provided in RequestLocationInformation, and the location server can perform a positioning operation through a specific positioning method and can provide its positioning operation results through ProvideLocationInformation. The start of the positioning operation including the positioning method instruction can be replaced by signaling sent from the lower layer instead of LPP / SLPP message.

[0272] Fig.25 It is configured based on LPP messages, but applies to both LPP messages and SLPP messages. In this case, Fig.25 The location server can be the anchor UE in the sidelink positioning.

[0273] Fig.26 is a flow chart illustrating a method of performing a positioning process supported with multiple QoS levels according to the present disclosure. In particular, Fig.26 An example is shown of receiving configuration of multiple QoS levels from the perspective of a (anchor) UE and performing position measurement (ie, positioning procedure) based on the received configuration.

[0274] Reference Fig.26 In A05, the (anchor) UE receives a location information request message including information about multiple QoS levels. Here, in the case of Uu positioning, the location information request message is received from the network, and in the case of sidelink positioning, the location information request message is received from the target UE.

[0275] In addition, the multiple QoS levels may consist of a main QoS level, an intermediate QoS level, and a minimum QoS level.

[0276] In addition, the location information request message may include information on a plurality of location measurement methods corresponding to a plurality of QoS levels.

[0277] Next, in A10 , the (anchor) UE transmits a location information message including information on one of the QoS classes and location information related to the one QoS class in response to the location information request message.

[0278] Assuming that the multiple QoS levels consist of a primary QoS level, an intermediate QoS level, and a minimum QoS level, a first location measurement related to the primary QoS level is performed. If the first location measurement fails, a second location measurement related to the intermediate QoS level is performed. In addition, if the second location measurement fails, a third location measurement related to the minimum QoS level is performed. The location measurement result may be provided to the network or the target UE through a location information request message.

[0279] Preferably, the location information request message may separately include information about multiple location measurement methods corresponding to multiple QoS levels. In this case, the UE may receive a message indicating at least one of the multiple location measurement methods, and perform location measurement based on the indicated location measurement method and the QoS level corresponding to the indicated location measurement method. The location measurement result may be provided to the network or the target UE through the location information request message.

[0280] The above-mentioned embodiments are combinations of components and features of the present disclosure in a specific form. Unless otherwise explicitly mentioned, each component or feature should be considered as optional. Each component or feature can be implemented without being combined with other elements or features. In addition, some components and / or features can be combined to implement the embodiments of the present disclosure. The order of operations described in the embodiments of the present disclosure can be rearranged. Some components or features of an embodiment can be included in another embodiment, or components or features can be replaced by related components or features of another embodiment. It is obvious that claims that are not explicitly cited in the attached claims can be combined to form embodiments, or are included as new claims by modification after submission.

[0281] It is obvious to those skilled in the art that within the scope of the features of the present disclosure, the present disclosure can be implemented in various specific forms. Therefore, the above detailed description should not be interpreted restrictively in all aspects, but should be regarded as illustrative. The scope of the present disclosure should be determined by the reasonable interpretation of the attached claims, and all changes within the equivalent scope of the present disclosure are included in the scope of the present disclosure.

[0282] Industrial Applicability

[0283] The present disclosure may be used in a terminal, a base station or other equipment of a wireless mobile communication system.

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method comprising the following steps: receiving a location information request message including information about a plurality of quality of service (QoS) levels; as well as sending a location information message in response to the location information request message, The location information message includes information about one QoS level among the multiple QoS levels and location information related to the one QoS level.

2. The method according to claim 1, wherein: The multiple QoS levels include a primary QoS level, an intermediate QoS level and a minimum QoS level.

3. The method according to claim 2, further comprising the steps of: performing a first location measurement associated with the primary QoS class; Based on the failure of the first location measurement, performing a second location measurement associated with the intermediate QoS level; and Based on the second location measurement failing, performing a third location measurement associated with the minimum QoS level.

4. The method according to claim 1, wherein: The location information request message includes information on a plurality of location measurement methods associated with a plurality of the QoS classes.

5. The method according to claim 4, further comprising the steps of: receiving a message indicating at least one of a plurality of said location measurement methods; as well as Location measurement is performed based on the indicated location measurement method and the QoS level associated with the indicated location measurement method.

6. A user equipment UE in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; as well as at least one computer memory operatively connectable to the at least one processor and storing instructions that, when executed, enable the at least one processor to perform operations comprising: receiving a location information request message including information about a plurality of quality of service (QoS) levels; and sending a location information message in response to the location information request message, The location information message includes information about one QoS level among the multiple QoS levels and location information related to the one QoS level.

7. The UE according to claim 6, wherein: The multiple QoS levels include a primary QoS level, an intermediate QoS level and a minimum QoS level.

8. The UE according to claim 7, the operation further comprising: performing a first location measurement associated with the primary QoS class; performing a second location measurement associated with the intermediate QoS level based on the failure of the first location measurement; as well as Based on the second location measurement failing, performing a third location measurement associated with the minimum QoS level.

9. The UE according to claim 6, wherein: The location information request message includes information on a plurality of location measurement methods associated with a plurality of the QoS classes.

10. The UE according to claim 9, the operation further comprising: receiving a message indicating at least one of a plurality of said location measurement methods; as well as Location measurement is performed based on the indicated location measurement method and the QoS level associated with the indicated location measurement method.

11. A processing device in a wireless communication system, the processing device comprising: at least one processor; as well as at least one computer memory operatively connectable to the at least one processor and storing instructions which, when executed, enable the at least one processor to perform operations for a user equipment (UE), the operations comprising: receiving a location information request message including information about a plurality of quality of service (QoS) levels; and sending a location information message in response to the location information request message, The location information message includes information about one QoS level among the multiple QoS levels and location information related to the one QoS level.

12. A computer-readable storage medium storing at least one program code comprising instructions, which when executed enable at least one processor to perform operations for a user equipment (UE), the operations comprising: receiving a location information request message including information about a plurality of quality of service (QoS) levels; as well as sending a location information message in response to the location information request message, The location information message includes information about one QoS level among the multiple QoS levels and location information related to the one QoS level.

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