Terminal and positioning method

Abstract

This terminal has: a control unit for assuming inter-bandwidth part (BWP) frequency hopping or intra-BWP frequency hopping to be applied to a signal related to position measurement; a reception unit for receiving the signal related to the position measurement, from a base station, by applying the inter-BWP frequency hopping or the intra-BWP frequency hopping to the signal; and a transmission unit for transmitting, to the base station, information including a result of measurement on the signal related to the position measurement.

Description

[Technical Field]

[0001] The present invention relates to a terminal and a positioning method in a wireless communication system. [Background technology]

[0002] The 3GPP (3rd Generation Partnership Project) is exploring a wireless communication method called 5G or NR (New Radio) (hereinafter referred to as "NR") in order to achieve further increases in system capacity, further increases in data transmission speed, and further decreases in latency in the wireless section. Various wireless technologies and network architectures are being considered to meet the requirements of NR, such as large capacity systems, high-speed data transmission, low latency, simultaneous connection of many terminals, low cost, and low power consumption (for example, Non-Patent Document 1).

[0003] Furthermore, in 3GPP standardization, a new device type (hereinafter also referred to as "RedCapUE") is being considered as a Reduced Capability NR device, which has lower cost and complexity than eMBB (enhanced Mobile Broadband) devices or URLLC (Ultra-Reliable and Low Latency Communications) devices. In addition, to reduce complexity, RedCapUE is being considered to support HD-FDD (Half-Duplex Frequency Division Duplex). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V16.8.0(2021-12) [Non-Patent Document 2] 3GPP TS 38.305 V16.7.0(2021-12) [Non-Patent Document 3] 3GPP TS 38.455 V16.6.0(2021-12) [Non-Patent Document 4] 3GPP TS 37.355 V16.7.0(2021-12) [Non-Patent Document 5] 3GPP TS 23.032 V16.1.0(2021-12) [Non-Patent Document 6] 3GPP TS 38.215 V16.4.0(2020-12) [Non-Patent Document 7] 3GPP TS 38.331 V16.7.0(2021-12) [Non-Patent Document 8] 3GPP TS 38.211 V16.8.0(2021-12) [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In NR, improvements to User Equipment (UE) positioning are being considered. Furthermore, positioning for RedCapUE is being explored. Compared to regular UE, RedCapUE uses a narrower bandwidth, so a decrease in the accuracy of positioning using a reference signal is anticipated.

[0006] The present invention has been made in view of the above points, and aims to enable wideband positioning using a reference signal in a wireless communication system. [Means for solving the problem]

[0007] According to the disclosed technology, the device includes a transmitting unit that transmits to a base station a terminal capability indicating whether or not it supports frequency hopping applied to a positioning signal, a receiving unit that receives parameters necessary for the frequency hopping from the base station, and a control unit that determines the bandwidth to be hopped based on the parameters necessary for the frequency hopping, wherein the receiving unit receives the positioning signal to which the frequency hopping is applied from the base station. The control unit then applies a gap for wireless retuning, which defines a plurality of candidate gap periods, each of which is longer than the gap period set for the high-end terminal.A terminal is provided.

Advantages of the Invention

[0008] According to the disclosed technology, in a wireless communication system, positioning using a reference signal can be performed in a wide band.

Brief Description of the Drawings

[0009] [Figure 1] It is a diagram for explaining a wireless communication system. [Figure 2] It is a diagram showing an example (1) of positioning. [Figure 3] It is a diagram showing an example of measuring DL-RSTD. [Figure 4] It is a diagram showing an example of measuring UL-RTOA. [Figure 5] It is a diagram showing an example (2) of positioning. [Figure 6] It is a diagram showing an example of measuring RTT. [Figure 7] It is a diagram showing an example (1) of frequency hopping in an embodiment of the present invention. [Figure 8] It is a diagram showing an example (2) of frequency hopping in an embodiment of the present invention. [Figure 9] It is a diagram showing an example of frequency hopping on the outer periphery of the BWP of PRS in an embodiment of the present invention. [Figure 10] It is a diagram showing an example (1) of frequency hopping between slots of PRS in an embodiment of the present invention. [Figure 11] It is a diagram showing an example (2) of frequency hopping between slots of PRS in an embodiment of the present invention. [Figure 12] It is a diagram showing an example (1) of frequency hopping within a slot of PRS in an embodiment of the present invention. [Figure 13] It is a diagram showing an example (2) of frequency hopping within a slot of PRS in an embodiment of the present invention. [Figure 14] It is a diagram showing an example (3) of frequency hopping between slots of PRS in an embodiment of the present invention. [Figure 15] This figure shows an example (4) of inter-slot frequency hopping of a PRS in an embodiment of the present invention. [Figure 16] This figure shows an example (3) of in-slot frequency hopping for SRS for positioning in an embodiment of the present invention. [Figure 17] This figure shows an example (4) of in-slot frequency hopping for SRS for positioning in an embodiment of the present invention. [Figure 18] This figure shows an example (1) of frequency hopping within the BWP of a PRS in an embodiment of the present invention. [Figure 19] This figure shows an example (2) of frequency hopping within the BWP of a PRS in an embodiment of the present invention. [Figure 20] This figure shows an example of the functional configuration of the base station 10 in an embodiment of the present invention. [Figure 21] This figure shows an example of the functional configuration of terminal 20 in an embodiment of the present invention. [Figure 22] This figure shows an example of the hardware configuration of a base station 10 or terminal 20 in an embodiment of the present invention. [Figure 23] This figure shows an example of the configuration of a vehicle 2001 in an embodiment of the present invention. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to those described below.

[0011] In the operation of the wireless communication system according to the embodiments of the present invention, existing technologies may be used as appropriate. However, such existing technologies include, for example, existing LTE, but are not limited to existing LTE. Furthermore, the term "LTE" as used herein has a broad meaning that includes LTE-Advanced and LTE-Advanced and later methods (e.g., NR), or wireless LAN (Local Area Network), unless otherwise specified.

[0012] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or any other method (for example, a Flexible Duplex).

[0013] Furthermore, in the embodiments of the present invention, "configuring" wireless parameters may mean that predetermined values ​​are pre-configured, or that wireless parameters notified from the base station 10 or terminal 20 are configured.

[0014] Figure 1 is a diagram illustrating a wireless communication system. The wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20, as shown in Figure 1. Although Figure 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple base stations 10 and terminals 20.

[0015] Base station 10 is a communication device that provides one or more cells and performs wireless communication with terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. In addition, the TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe.

[0016] The base station 10 transmits synchronization signals and system information to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, via NR-PBCH and is also called broadcast information. The synchronization signals and system information may also be called SSB (SS / PBCH block). As shown in Figure 1, the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals using beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via secondary cells (SCell) and primary cells (PCell) using CA (Carrier Aggregation). Furthermore, terminal 20 may communicate via the primary cell of base station 10 and the primary secondary cell group cell (PSCell: Primary SCG Cell) of other base stations 10 using DC (Dual Connectivity).

[0017] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from the base station 10 and performs propagation path quality measurements based on the reception results of these reference signals. Terminal 20 may also be referred to as UE and base station 10 as gNB.

[0018] Furthermore, LTE and NR support carrier aggregation, a feature that uses broadband to secure data resources. Carrier aggregation allows for the securing of broadband data resources by bundling multiple component carriers. For example, by bundling multiple 20MHz bandwidths, a 100MHz bandwidth can be used.

[0019] Furthermore, in 3GPP standardization, a new device type (hereinafter also referred to as "RedCapUE") is being considered as a Reduced Capability NR device, which has lower cost and complexity than eMBB (enhanced Mobile Broadband) devices or URLLC (Ultra-Reliable and Low Latency Communications) devices.

[0020] For example, RedCapUE may have a small maximum supported bandwidth. For instance, in FR1 (Frequency Range 1), RedCapUE may have a maximum bandwidth of 20 MHz during initial access and thereafter. For example, in FR2 (Frequency Range 2), RedCapUE may have a maximum bandwidth of 100 MHz during initial access and thereafter.

[0021] For example, RedCapUE may support a small number of receive branches. For example, RedCapUE may support one or two receive branches. Also, RedCapUE may support a small maximum number of MIMO layers. For example, RedCapUE may support one or two MIMO layers. Also, RedCapUE may support a small number of modulation orders. For example, RedCapUE may optionally support 256QAM (Quadrature amplitude modulation) in FR1.

[0022] Furthermore, RedCapUE is considering supporting HD-FDD (Half-Duplex Frequency Division Duplex) to reduce complexity. In Full-Duplex FDD, the DL carrier and UL carrier are placed on different frequencies and can be transmitted and received simultaneously. On the other hand, in HD-FDD, the DL carrier and UL carrier are placed on different frequencies and cannot be transmitted and received simultaneously, requiring a switching time between DL and UL. HD-FDD eliminates the duplexer and instead uses switches and additional filters.

[0023] Furthermore, the positioning of terminal 20 by LMF (Location Management Function) in the Uu interface of 3GPP release 16 or 17 is performed by the methods 1)-3) shown below (see Non-Patent Documents 2, 3 and 4).

[0024] 1) Method based on DL-TDOA (Time Difference of Arrival) 2) Method based on UL-TDOA 3) Method based on multi-RTT (Round Trip Time)

[0025] Figure 2 shows an example of positioning (1). As shown in Figure 2, the UE's position information may be calculated based on DL-TDOA. Alternatively, the UE's position may be estimated based on DL-RSTD (Received Signal Time Difference), which is measured by the UE using DL radio signals transmitted from multiple NR TRPs. The geographical location of the TRPs and the DL transmission timing at the TRPs may be used for this estimation. In addition to DL-RSTD, the UE's position may also be estimated based on the RSRP (Reference Signal Received Power) of the DL-PRS (Positioning Reference Signal).

[0026] In the DL-TDOA-based method, the location of the UE may be calculated using the following procedure. 1) The gNB sends DL-PRS from each TRP to the UE. 2) The UE reports the measurement result, DL-RSTD, to the GW and / or gNB and / or LMF via LPP (LTE Positioning Protocol). 3) The gNB reports timing information related to TRP to the LMF via NRPPa (NR Positioning Protocol A). 4) Based on the above information reported from the UE and gNB, the LMF calculates the UE location.

[0027] For example, as shown in Figure 2, the delay between the UE and TRP0, the delay between the UE and TRP1, and the delay between the UE and TRP2 may be measured, and the location of the UE may be calculated based on the geographical location of each TRP and the DL transmission timing.

[0028] Figure 3 shows an example of measuring DL-RSTD. Hereafter, "and / or" will also be written as " / ". As shown in Figure 3, DL-RSTD may refer to the time difference measured by the UE between the start of reception of a DL subframe of a reference TRP (TRP0 in Figure 3) and the start of reception of a DL subframe of another TRP. The start of a subframe may be determined by detecting DL-PRS.

[0029] The timing of each TRP transmission does not need to be uniform.

[0030] Regarding the calculation of UE location using DL-TDOA, the information shown in 1)-5) below may be reported from the UE to the GW / gNB / LMF.

[0031] 1) PCI (Physical Cell ID), GCI (Global Cell ID), and TRP-ID in each measurement. 2) DL-RSTD measurement results 3)DL-PRS-RSRP measurement results 4) Time of measurement (time stamp) 5) Each measurement quality Regarding the calculation of UE location using DL-TDOA, the information shown in 1)-6) below may be reported from gNB to LMF.

[0032] 1) PCI, GCI, and TRP-ID of TRP controlled by gNB 2) Timing information of TRP controlled by gNB 3) DL-PRS settings for TRP controlled by gNB 4) Information related to the SSB of the TRP controlled by the gNB, such as SSB time and frequency resources. 5) Information relating to the spatial direction of DL-PRS of TRP controlled by gNB 6) Information relating to the geographical coordinates of TRP controlled by gNB

[0033] DL-RSTD may be defined as the time difference measured by the UE between the start of reception of a DL subframe in a reference TRP and the start of reception of a DL subframe in another TRP. Multiple DL-PRS resources may be used to determine the start of reception of subframes.

[0034] As part of the timing information report related to the TRP controlled by the gNB, the TRP's SFN initialization time may also be reported. The SFN initialization time is the time when SFN0 is started.

[0035] As part of the report of information relating to the geographic coordinates of the TRP controlled by the gNB, a point on an ellipsoid with altitude and an ellipse indicating the range of error may be reported (see Non-Patent Document 5). For example, latitude, longitude, altitude, direction of altitude, range of altitude error, etc., may be reported.

[0036] As shown in Figure 2, the UE's location information may be calculated based on UL-TDOA. Alternatively, the UE's location may be estimated based on UL-RTOA (Relative Time of Arrival), which is measured by the TRPs of multiple NRs (Non-Resonant Radios) on the UL radio signal transmitted from the UE. Other configuration information may be used in this estimation. In addition to UL-RTOA, the UE's location may also be estimated based on the RSRP of the UL-SRS (Sounding Reference Signal).

[0037] In the UL-TDOA-based method, the location of the UE may be calculated using the following procedure. 1) The UE sends SRS to multiple TRPs. 2) gNB reports the geographic coordinates of the measured UL-RTOA and TRP to LMF via NRPPa. 3) Based on the above information reported by gNB, LMF calculates the location of UE.

[0038] For example, as shown in Figure 2, the RTOA from UE to TRP0, the RTOA from UE to TRP1, and the RTOA from UE to TRP2 may be measured, and the UE's position may be calculated based on the geographical location of each TRP and the UL transmission timing.

[0039] Figure 4 shows an example of measuring UL-RTOA. As shown in Figure 4, UL-RTOA may refer to the time difference between the start of reception of the UL subframe containing the TRP's SRS and the RTOA reference time when the UL was transmitted.

[0040] Regarding the calculation of UE locations using UL-TDOA, the information shown in 1)-9) below may be reported from gNB to LMF.

[0041] 1) PCI, GCI, and TRP-ID of TRP controlled by gNB 2) Information related to the SSB of the TRP controlled by the gNB, such as SSB time and frequency resources. 3) Information relating to the geographic coordinates of TRP controlled by gNB 4) Measurement of NCGI (NR Cell Global Identifier) ​​and TRP-ID 5) UL-RTOA 6) UL-SRS RSRP 7) Time of measurement 8) Quality of each measurement 9) Information related to the beam of each measurement

[0042] UL-RTOA may be defined as the time difference between the start of reception of the UL subframe containing the SRS in the TRP and the RTOA reference time when the UL was transmitted. The gNB may report the geographic coordinates of the TRP to the LMF via NRPPa.

[0043] Figure 5 shows an example of positioning (2). As shown in Figure 5, the UE's position information may be calculated based on multiple RTTs. The UE's position may be estimated based on UE / gNB receive-transmit time difference measurements using DL-PRS and UL-SRS. DL-PRS-RSRP and UL-SRS-RSRP may be used for this estimation. The LMF may determine the RTT using UE / gNB receive-transmit time difference measurements.

[0044] In a multi-RTT-based method, the UE's position may be calculated using the following procedure. 1) The gNB sends DL-PRS from each TRP to the UE. 2) The UE sends SRS to multiple TRPs. 3) The UE reports the UE receive-transmit time difference to the GW and / or gNB and / or LMF via LPP. 4) The gNB reports the gNB receive-transmit time difference to the LMF via NRPPa. 5) Based on the above information reported by the UE and gNB, the LMF calculates the location of the UE.

[0045] For example, as shown in Figure 5, the RTT between UE and TRP0, the RTT between UE and TRP1, and the RTT between UE and TRP2 may be measured, and the location of UE may be calculated based on the geographical location of each TRP.

[0046] Figure 6 shows an example of measuring RTT. As shown in Figure 6, the UE receive-transmit time difference may refer to the time difference between when the TRP receives the DL subframe and when it transmits the UL subframe. Also, as shown in Figure 6, the gNB receive-transmit time difference may refer to the time difference between when the TRP receives the UL subframe and when the TRP transmits the DL subframe.

[0047] Regarding the calculation of UE location using multiple RTTs, the information shown in 1)-5) below may be reported from the UE to the GW / gNB / LMF.

[0048] 1) PCI, GCI, and TRP-ID in each measurement 2)DL-PRS-RSRP measurement results 3) UE reception-transmission time difference measurement results 4) Time of measurement 5) Each measurement quality

[0049] Regarding the calculation of UE location by RTT, the information shown in 1)-9) below may be reported from gNB to LMF.

[0050] 1) PCI, GCI, and TRP-ID of TRP controlled by gNB 2) Timing information of TRP controlled by gNB 3) DL-PRS settings for TRP controlled by gNB 4) Information related to the SSB of the TRP controlled by the gNB, such as SSB time and frequency resources. 5) Information relating to the spatial direction of DL-PRS of TRP controlled by gNB 6) Information relating to the geographical coordinates of TRP controlled by gNB 7) NCGI and TRP-ID measurements 8) gNB receive-transmit time difference 9) UL-SRS RSRP 10) UL-AoA (Angle of Arrival), e.g., azimuth angle and elevation angle 11) Time of measurement 12) Measurement Quality 13) Information related to the measurement beam

[0051] For definitions of UE receive-transmit time difference and gNB receive-transmit time difference, please refer to Non-Patent Literature 6. Similar to DL-RSTD, the geographical coordinates of TRP may be reported.

[0052] As described above, positioning using the Uu interface employed positioning methods such as DL-TDOA, UL-TDOA, and multi-RTT, which utilize RSTD, RTOA, and the receive-transmit time difference, respectively, to indicate the propagation delay between the UE and TRP.

[0053] Here, improvements to UE positioning in NR are being considered. Furthermore, positioning for RedCapUE is being considered. In addition, further bandwidth reduction for RedCapUE is being considered.

[0054] Positioning for RedCapUE is currently in the performance evaluation stage, and specific enhancement measures are being considered. For example, positioning accuracy decreases in narrow bandwidths, so ensuring positioning accuracy in narrow bandwidths is required. Also, for example, since available resources are limited in narrow bandwidths, optimization of resource mapping is required. Furthermore, for example, a mapping pattern with a comb structure and RE offset may be adopted. It should be noted that the embodiments of the present invention are not limited to RedCapUE and may be applied to ordinary UEs.

[0055] Therefore, terminal 20 may assume that frequency hopping is applied to the PRS. Terminal 20 may also assume that frequency hopping outside the BWP is applied to the PRS. Terminal 20 may also assume that frequency hopping outside the BWP is applied to the PRS with a measurement gap. Terminal 20 may also assume that frequency hopping outside the BWP is applied to the PRS without a measurement gap. Terminal 20 may also assume that frequency hopping inside the BWP is applied to the PRS. Terminal 20 may also assume that frequency hopping inside the BWP is applied to the PRS with a measurement gap. Terminal 20 may also assume that frequency hopping inside the BWP is applied to the PRS with a measurement gap.

[0056] Furthermore, the embodiments of the present invention are not limited to RedCapUE positioning, but may also be applied to general NR terminal positioning (UE NR positioning).

[0057] Figure 7 shows an example of frequency hopping (1) in an embodiment of the present invention. Figure 7 shows an example of PRS without frequency hopping and an example of PRS with frequency hopping. Due to hardware limitations imposed by size constraints, it is difficult to increase the antenna gain of the RedCapUE.

[0058] Therefore, frequency hopping as shown in Figure 7 may be introduced for RedCapUE. By introducing frequency hopping outside the BWP, the transmission power per RE (Resource Element) can be increased, and measurements can be performed with the same bandwidth as when hopping is not performed. This ensures positioning accuracy. In addition, by introducing frequency hopping within the BWP, measurements can be performed with a reduced bandwidth used for PRS. This allows for resource conservation.

[0059] Figure 8 shows an example of frequency hopping of a PRS in an embodiment of the present invention. Terminal 20 and base station 10 may assume that a hopping pattern is set using SRS defined by the same offset set as a reference to a symbol where the offset k′=0 (see Non-Patent Literature 8) defined by dl-PRS-PointA of the PRS is 0. The parameters related to frequency hopping in Figure 8 are as follows (see Non-Patent Literature 8).

[0060] Dl-PRS-CombSizeN = n6 dl-PRS-NumSymbols = n6 repetitionFactor (R) = n3 RE offset = {0,3,1,4,2,5}

[0061] Based on the above parameters, frequency hopping is set such that the number of subcarriers in the transmit comb is 6, the number of symbols is 6, the number of repeating symbols is 3, and the RE offset is {0,3,1,4,2,5}, as shown in Figure 8. For example, terminal 20 and base station 10 may assume that the same RE offset is set at the source and destination of the hopping, or they may assume that different RE offsets are set.

[0062] For example, a repetition factor (R) is set, and terminal 20 and base station 10 may assume hopping for each R symbol within the offset set defined by k'.

[0063] For example, terminal 20 and base station 10 may assume intra-slot frequency hopping, inter-slot frequency hopping, or a combination of intra-slot and inter-slot frequency hopping. Terminal 20 and base station 10 may also assume that different parameters are set for intra-slot frequency hopping and inter-slot frequency hopping.

[0064] For example, terminal 20 may report the required UE capabilities to the network. Such UE capabilities may include information indicating whether or not it supports hopping. Furthermore, such UE capabilities may include information indicating whether or not it supports intra-slot frequency hopping and / or inter-slot frequency hopping. Furthermore, such UE capabilities may include information indicating whether or not it supports non-BWP frequency hopping.

[0065] Furthermore, the hopping capability or feature group may be defined in combination with the capability related to PRS measurement (with or without a measurement gap).

[0066] For example, terminal 20 may assume that the parameters required for frequency hopping are set, updated, and / or notified from the network by RRC signaling, MAC-CE, and / or DCI. Alternatively, terminal 20 may request the parameters required for frequency hopping from the network.

[0067] The parameters required for the frequency hopping may include at least one of the following: a parameter for determining the hopping destination, the bandwidth for hopping, and the length of the hopping time domain. Default values ​​for the parameters required for the frequency hopping may be specified in the specification or set for each UE.

[0068] For example, terminal 20 may assume that intra-slot frequency hopping and / or inter-slot frequency hopping is explicitly configured from the network, or terminal 20 may implicitly assume hopping behavior through the association of configured parameters. For example, it may be configured as {activate, deactivate}. For example, if the hopping bandwidth is set to be smaller than the PRS bandwidth, terminal 20 may assume that intra-BWP hopping is configured. For example, if the hopping bandwidth is set to be larger than the PRS bandwidth, terminal 20 may assume that extra-BWP hopping is configured.

[0069] Figure 9 shows an example of BWP-out-of-frequency hopping for SRS for positioning in an embodiment of the present invention. As shown in Figure 10, terminal 20 may be assumed to perform BWP-out-of-frequency hopping, which hops outside the frequency domain of the BWP. BWP-out-of-frequency hopping may also refer to an operation that receives PRS in a wideband including outside the BWP temporarily without changing the BWP. By performing BWP-out-of-frequency hopping, positioning can be performed in a wideband including outside the BWP temporarily, thereby improving positioning accuracy.

[0070] For example, frequency hopping outside the BWP may be performed in combination with frequency hopping within the BWP. Frequency hopping within the BWP may also be frequency hopping within the BWP and / or within the RB, details of which will be described later.

[0071] For example, regarding the RF retuning gap time for performing BWP-external PRS measurements with a measurement gap, the terminal 20 and base station 10 may assume the following 1) and 2) shown below. In addition to DL-PRS measurements with a measurement gap, a PRS processing window (PPW) may be set as the RF retuning gap time to support DL-PRS measurements without a measurement gap, assuming PRS reception instead of a measurement gap.

[0072] 1) Rules for setting the RF retuning gap. 1-1) The gap may be set at periodically fixed intervals. The period may be determined by the specifications or set from the network. Intra-slot gaps and inter-slot gaps may be assumed. It may also be assumed that the gap is set at the same time as the measured gap. 1-2) The gap may be set or pre-set only when RF retuning becomes necessary. Information regarding this timing may be requested by terminal 20 when needed, or it may be assumed that it will be notified from the network when needed. Intra-slot gaps and inter-slot gaps may be assumed.

[0073] 2) RF retuning gap setting time. Multiple candidate gap times are defined depending on the UE capability, and the network may configure which one to use. T1 and T2 below may be defined independently of the values ​​set in the SRS.

[0074] 2-1) As an example, in a low-end UE that can only simultaneously listen with a bandwidth of about BWP, a longer gap period T1 may be set for retuning. The gap period T1 does not include the measurement gap period. Also, the longer gap period T1 required for retuning and the measurement gap period T MG The gap period including T MG It may be newly set as ' (including the measurement gap in the RF retuning gap period).

[0075] 2-2) As an example, in a high-end UE where BWP is limited from a power consumption perspective but a wider bandwidth can be simultaneously monitored for RF, a shorter gap period T2 may be set than T1 (gap period T2 does not include the measurement gap). Alternatively, a shorter gap period T2 and a measurement gap period T MG The gap period including this is grouped together as T MG It may be newly set as ' (including the measurement gap in the RF retuning gap period). Alternatively, in the high-end UE, set to no gap and set the measurement gap period T MG You may set only that.

[0076] Note that T1 and T2 mentioned above may be defined independently of the values ​​set for SRS.

[0077] FIG. 10 is a diagram showing an example (1) of inter-slot frequency hopping of PRS in an embodiment of the present invention. FIG. 10 is an example in which inter-slot BWP outer peripheral frequency hopping is set and a gap is periodically set. As described above, the gap period T can be set to any one of {T1, T2, 0}. As shown in FIG. 10, T MG ′ is the length obtained by adding 2T to T MG .

[0078] FIG. 11 is a diagram showing an example (2) of inter-slot frequency hopping of PRS in an embodiment of the present invention. FIG. 11 is an example in which inter-slot BWP outer peripheral frequency hopping is set and a gap is set at a timing when RF re-tuning is required. As described above, the gap period T can be set to any one of {T1, T2, 0}. As shown in FIG. 11, T MG ′ is the length obtained by adding 2T to T MG . The gap period at a timing when RF re-tuning is not required is T MG .

[0079] FIG. 12 is a diagram showing an example (1) of intra-slot frequency hopping of PRS in an embodiment of the present invention. FIG. 12 is an example in which intra-slot BWP outer peripheral frequency hopping is set and a gap is periodically set. As described above, the gap period T can be set to any one of {T1, T2, 0}. As shown in FIG. 12, the overall gap period is T MG ′.

[0080] FIG. 13 is a diagram showing an example (2) of intra-slot frequency hopping of PRS in an embodiment of the present invention. FIG. 14 is an example in which inter-slot BWP outer peripheral frequency hopping is set and a gap is set at a timing when RF re-tuning is required. As described above, the gap period T can be set to any one of {T1, T2, 0}. As shown in FIG. 13, the overall gap period is T MG ′ and includes the portion that does not require re-tuning.

[0081] For example, regarding the RF retuning gap time for performing BWP-external PRS measurements without a measurement gap, the terminal 20 and base station 10 may assume the following 1) and 2) shown below. In addition to DL-PRS measurements with a measurement gap, a PRS processing window (PPW) may be set as the RF retuning gap time to support DL-PRS measurements without a measurement gap, assuming PRS reception instead of a measurement gap.

[0082] 1) Rules for setting the RF retuning gap. 1-1) Gaps may be set at periodically fixed intervals. The interval may be determined by the specifications or set by the network. Gaps within slots and gaps between slots may be assumed. It may also be assumed that the gaps are set at intervals adjacent to the PPW. 1-2) The gap may be set or pre-set only when RF retuning becomes necessary. Information regarding this timing may be requested by terminal 20 when needed, or it may be assumed that it will be notified from the network when needed. Intra-slot gaps and inter-slot gaps may be assumed.

[0083] 2) RF retuning gap setting time. Multiple candidate gap times are defined depending on the UE capability, and the network may configure which one to use.

[0084] 2-1) For example, in a low-end UE that can only simultaneously listen with a bandwidth of about BWP, a longer gap period T1 may be set to allow for retuning.

[0085] 2-2) As an example, in a high-end UE where BWP is limited from a power consumption perspective but a wider bandwidth can be simultaneously monitored in terms of RF, a shorter gap period T2 than T1 may be set. Alternatively, in such a high-end UE, no gap may be set.

[0086] Note that T1 and T2 mentioned above may be defined independently of the values ​​set for SRS.

[0087] Figure 14 shows an example (3) of inter-slot frequency hopping of the PRS in an embodiment of the present invention. Figure 14 shows an example where inter-slot BWP-external frequency hopping is set and a gap is set periodically. As described above, the gap period T can be set to any of {T1, T2, 0}. As shown in Figure 14, PPW may be set for the entire period including the PRS, or it may be set for a period adjacent to the gap period T.

[0088] Figure 15 shows an example (4) of inter-slot frequency hopping of the PRS in an embodiment of the present invention. Figure 15 shows an example in which inter-slot BWP-external frequency hopping is set and a gap is set at the timing when RF retuning is required. As described above, the gap period T can be set to any of {T1, T2, 0}. As shown in Figure 14, PPW may be set to a period adjacent to the PRS or to a period adjacent to the gap period T.

[0089] Figure 16 shows an example (3) of in-slot frequency hopping of the PRS in an embodiment of the present invention. Figure 16 shows an example where in-slot BWP out-of-slot frequency hopping is set and a gap is set periodically. As described above, the gap period T can be set to any of {T1, T2, 0}. As shown in Figure 16, the PPW may be set adjacent to the beginning and end of the overall PRS measurement period.

[0090] Figure 17 shows an example (4) of in-slot frequency hopping of the PRS in an embodiment of the present invention. Figure 17 shows an example where BWP-external frequency hopping between slots is set and a gap is set at the timing when RF retuning is required. As described above, the gap period T can be set to any of {T1, T2, 0}. As shown in Figure 16, PPW may be set adjacent to the beginning and end of the overall PRS measurement period.

[0091] For example, prior scheduling may be carried out as shown in 1)-4) below, taking into consideration the impact on peripheral devices.

[0092] 1) Limit the hopping bandwidth and / or timing to avoid interference. 2) Receive PRS only using the specified PRS resource ID from the network. 3) Other devices may stop transmitting in order to prioritize BWP hopping, or other devices may transmit using only REs that are not being used for hopping. 4) If M (where M is 1 or greater) symbols or more collide with a peripheral terminal signal, either 1) or 2) below may be considered. M may be defined in the specification or notified from the network.

[0093] 1) Drop the received PRS and do not use it for positioning. 2) Request a retransmission of the PRS.

[0094] For example, if there are other signals to be transmitted or received within the BWP at the timing of the retuning gap, priority may be set as shown in 1)-3) below.

[0095] 1) Prioritize other signals and do not perform PRS hopping. 2) Prioritize other signals and perform PRS reception using BWP hopping. PRS reception may be performed with or without a measurement gap. 3) Prioritize PRS, set the RF retuning gap, perform BWP-external hopping, and do not transmit or receive other signals.

[0096] For example, a simple hopping pattern may be set up to take narrowband communication into consideration. For instance, a table showing multiple candidate hopping bandwidths and / or a hopping rule that simplifies processing may be defined, categorized as, for example, normal UE, high-end RedCapUE, and low-end RedCapUE.

[0097] For example, parameter information such as hopping bandwidth may be shared between UL (SRS) and DL (PRS). Positioning accuracy may be corrected in UL positioning and DL positioning (multi-RTT).

[0098] For example, parameters such as hopping bandwidth may be standardized or shared between serving TRPs and non-serving TRPs. This may ensure or correct positioning accuracy between TRPs in multi-RTT and DL-TDOA positioning.

[0099] For positioning without a measurement gap, the PPW setting unit may be set as follows: 1) or 2) below.

[0100] 1) It may be set for each BWP. If set for each BWP, it may be associated with the hopping rule and set to the frequency where PRS reception is expected. 2) It may be set for each hopping bandwidth.

[0101] Figure 18 shows an example (1) of frequency hopping within a BWP for SRS for positioning in an embodiment of the present invention. As shown in Figure 18, terminal 20 may be assumed to perform frequency hopping within the frequency domain of the BWP. SRS may be mapped to only a part of the BWP, and the remaining frequency domain may be covered by hopping, thereby making effective use of resources within the BWP. The example shown in Figure 18 is an example of hopping in RB units within the BWP.

[0102] Figure 19 shows an example (2) of frequency hopping within the BWP of an SRS for positioning in an embodiment of the present invention. The example shown in Figure 19 is an example of hopping in RE units within the RB of the BWP.

[0103] For example, a simple hopping pattern may be set up to take narrowband communication into consideration. For instance, a table showing multiple candidate hopping bandwidths and / or a hopping rule that simplifies processing may be defined, categorized as, for example, normal UE, high-end RedCapUE, and low-end RedCapUE.

[0104] For example, parameter information such as hopping bandwidth may be shared between UL (SRS) and DL (PRS). Positioning accuracy may be corrected in UL positioning and DL positioning (multi-RTT).

[0105] For example, the PPW setting units for positioning without a measurement gap may be set as follows (1)-3).

[0106] 1) You can also set this for each BWP. 2) It may also be set for each RB. If set for each RB, it may be set to the RB associated with the hopping rule and which RB is expected to receive PRS signals. 3) You may also set it for each RE. If you set it for each RE, you may set it to the RE associated with the hopping rule and which is expected to receive PRS.

[0107] Note that "PRS (Positioning Reference Signal)" may be replaced with "DL-PRS," etc.

[0108] Note that "network" may be replaced with "gNB," "TRP," "LMF," etc.

[0109] Note that "MG-less positioning" may be rephrased as "MG-less measurement," "PRS measurement outside MG," etc.

[0110] Note that "RF retuning" may be replaced with "RF switching," "RF adjustment," etc.

[0111] Note that "configured via network" may be interpreted as "configured via RRC signaling," "enable / deactivate / update via MAC-CE," or "indicate via DCI," etc.

[0112] As described above, the terminal 20 can improve its positioning accuracy by performing positioning in a wideband area. Furthermore, the base station 10 can effectively utilize resources within the BWP by frequency hopping a reference signal mapped to a portion of the BWP.

[0113] In other words, in wireless communication systems, positioning using a reference signal can be performed over a wide bandwidth.

[0114] (Device configuration) Next, we will describe an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above. The base station 10 and terminal 20 include functions to implement the embodiments described above. However, the base station 10 and terminal 20 may each have only some of the functions in the embodiments.

[0115] <Base station 10> Figure 20 shows an example of the functional configuration of a base station 10. As shown in Figure 20, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 20 is merely an example. The names of the functional categories and functional units can be anything as long as they can perform the operations according to the embodiment of the present invention.

[0116] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, information from a higher layer. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL reference signals, etc. to the terminal 20.

[0117] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20 in a storage device, and reads it from the storage device as needed. The contents of the setting information include, for example, information related to D2D communication settings.

[0118] As described in the embodiment, the control unit 140 performs processing related to the settings for the terminal 20 to perform D2D communication. The control unit 140 also transmits the scheduling of D2D communication and DL communication to the terminal 20 via the transmission unit 110. The control unit 140 also receives information related to the HARQ response of D2D communication and DL communication from the terminal 20 via the reception unit 120. The signal transmission function unit of the control unit 140 may be included in the transmission unit 110, and the signal reception function unit of the control unit 140 may be included in the reception unit 120.

[0119] <Terminal 20> Figure 21 is a diagram showing an example of the functional configuration of terminal 20. As shown in Figure 21, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 21 is merely an example. Any functional classification and functional unit names are acceptable as long as they can perform the operations according to the embodiment of the present invention.

[0120] The LTE-SL transmission / reception mechanism (module) and the NR-SL transmission / reception mechanism (module) described above may each separately have a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.

[0121] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and acquires signals from higher layers from the received physical layer signals. The receiving unit 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals or reference signals transmitted from the base station 10. For example, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20 as D2D communication, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0122] The setting unit 230 stores various setting information received from the base station 10 or terminal 20 by the receiving unit 220 in its storage device and reads it from the storage device as needed. The setting unit 230 also stores pre-configured setting information. The content of the setting information is, for example, information related to D2D communication settings.

[0123] As described in the embodiment, the control unit 240 controls D2D communication to establish an RRC connection with other terminals 20. The control unit 240 also performs power-saving operations. The control unit 240 also performs HARQ processing for D2D and DL communication. The control unit 240 transmits information related to the HARQ response for D2D and DL communication scheduled from the base station 10 to the base station 10. The control unit 240 may also schedule D2D communication with other terminals 20. The control unit 240 may also autonomously select resources to be used for D2D communication from a resource selection window based on sensing results, or it may perform re-evaluation or preemption. The control unit 240 also performs power-saving processing for D2D communication transmission and reception. The control unit 240 also performs processing related to inter-terminal coordination in D2D communication. The signal transmission function unit of the control unit 240 may be included in the transmission unit 210, and the signal reception function unit of the control unit 240 may be included in the reception unit 220.

[0124] (Hardware configuration) The block diagrams (Figures 20 and 21) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the above one device or the above multiple devices with software.

[0125] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. As mentioned above, the method of implementation is not particularly limited.

[0126] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 22 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0127] In the following explanation, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0128] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0129] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0130] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 20 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 21 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-described processes have been explained as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0131] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0132] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0133] The communication device 1004 is hardware (transceiver / receiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmit / receive antenna, amplifier section, transmit / receive section, transmission path interface, etc., may be implemented by the communication device 1004. The transmit / receive section may be implemented with physically or logically separated transmitting and receiving sections.

[0134] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0135] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0136] Furthermore, the base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0137] Figure 23 shows an example of the configuration of vehicle 2001. As shown in Figure 23, vehicle 2001 comprises a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0138] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0139] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0140] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, front and rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0141] The Information Services Unit 2012 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001. The Information Services Unit 2012 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0142] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0143] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0144] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0145] The communication module 2013 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 2012. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0146] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit, which outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., provided in the vehicle 2001.

[0147] (Summary of the embodiments) As described above, according to the embodiment of the present invention, a terminal is provided having a control unit that assumes BWP (Bandwidth Part) external frequency hopping or BWP internal frequency hopping applied to a signal related to positioning, a receiving unit that receives the signal related to positioning from a base station by applying the BWP external frequency hopping or BWP internal frequency hopping, and a transmitting unit that transmits information including the measurement result of the signal related to positioning to the base station.

[0148] With the above configuration, terminal 20 can improve positioning accuracy through broadband positioning. Furthermore, base station 10 can effectively utilize resources within the BWP by frequency hopping a reference signal mapped to a portion of the BWP. In other words, it can mitigate the degradation of positioning accuracy that occurs when using a reference signal in a wireless communication system.

[0149] When the control unit receives the positioning signal outside the BWP, it may set a gap only at the timing necessary for periodic gaps or wireless retuning. With this configuration, the terminal 20 can improve positioning accuracy by performing positioning over a wideband area.

[0150] The control unit may assume different gap lengths for wireless retuning based on the terminal capabilities. With the above configuration, the terminal 20 can improve its positioning accuracy by performing positioning over a wide bandwidth.

[0151] The control unit may, based on priority, decide whether or not to transmit the positioning signal if the gap for wireless retuning overlaps with other signals. With the above configuration, the terminal 20 can improve positioning accuracy by performing positioning over a wide bandwidth.

[0152] When the control unit assumes frequency hopping within the BWP, it may assume frequency hopping in resource block units or resource element units for the positioning signal. With the above configuration, the terminal 20 can improve positioning accuracy by performing positioning in a wideband.

[0153] Furthermore, according to an embodiment of the present invention, a positioning method is provided in which a terminal performs a control procedure that assumes BWP (Bandwidth Part) out-of-band frequency hopping or BWP in-band frequency hopping applied to a signal related to positioning; a reception procedure that receives the signal related to positioning from a base station by applying the BWP out-of-band frequency hopping or BWP in-band frequency hopping; and a transmission procedure that transmits information including the measurement result of the signal related to positioning to the base station.

[0154] With the above configuration, terminal 20 can improve positioning accuracy through broadband positioning. Furthermore, base station 10 can effectively utilize resources within the BWP by frequency hopping a reference signal mapped to a portion of the BWP. In other words, it can mitigate the degradation of positioning accuracy that occurs when using a reference signal in a wireless communication system.

[0155] (Supplement to the embodiment) While embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0156] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0157] Each aspect / embodiment described in this disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0158] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0159] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0160] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0161] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0162] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0163] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0164] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0165] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0166] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0167] The terms “system” and “network” as used in this disclosure are interchangeable.

[0168] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0169] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0170] In this disclosure, terms such as "Base Station (BS)", "wireless base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0171] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0172] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform information-based control or operation.

[0173] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0174] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0175] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0176] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0177] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0178] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0179] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0180] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0181] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0182] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0183] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0184] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0185] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0186] Numerology may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerology may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0187] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a numerology-based time unit.

[0188] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0189] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0190] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0191] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0192] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0193] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0194] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0195] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0196] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers in an RB may be determined based on numerology.

[0197] Furthermore, the time domain of the RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. Each TTI, subframe, etc., may consist of one or more resource blocks.

[0198] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0199] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0200] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a given numerology within a carrier. These common RBs may be identified by an index of the RBs relative to the carrier's common reference point. A Bandwidth Part (PRB) may be defined and numbered within a BWP.

[0201] A BWP may include a BWP for UL (Ultraviolet Link) and a BWP for DL ​​(Download Link). One or more BWPs may be set for a terminal 20 within a single carrier.

[0202] At least one of the configured BWPs may be active, and terminal 20 does not need to be expected to send or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0203] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0204] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0205] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0206] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0207] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way. [Explanation of Symbols]

[0208] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive Unit 2003 Steering Department 2004 Accelerator pedal 2005 Brake pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 Rotation speed sensor 2023 Pneumatic Sensor 2024 Vehicle Speed ​​Sensor 2025 Accelerometer 2026 Brake Pedal Sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driver Support Systems Department 2031 Microprocessor 2032 memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. A transmitting unit that transmits to a base station the terminal capability indicating whether or not it supports frequency hopping applied to positioning signals, A receiving unit that receives the parameters necessary for the frequency hopping from the base station, The system includes a control unit that determines the bandwidth for hopping based on the parameters required for the frequency hopping, The receiving unit receives the positioning signal to which the frequency hopping is applied from the base station, The control unit is a terminal that applies a gap for radio retuning, wherein multiple candidate gap periods are defined, the gap period set for the low-end terminal being longer than the gap period set for the high-end terminal.

2. A procedure for transmitting to a base station the terminal capability indicating whether or not it supports frequency hopping applied to positioning signals, A procedure for receiving the parameters necessary for the frequency hopping from the base station, A procedure for determining the bandwidth to be used for frequency hopping based on the parameters required for the frequency hopping, A procedure for receiving the positioning signal to which the aforementioned frequency hopping is applied from the base station, A positioning method in which a terminal performs a procedure for applying a gap for radio retuning, wherein multiple candidate gap periods are defined, the gap period set for the low-end terminal being longer than the gap period set for the high-end terminal.

Images