Terminal and base station

Abstract

A technique is provided that enables a terminal to properly receive a reference signal for positioning. [Solution] A terminal is provided with a transmitter that transmits terminal capability information indicating that a measurement gap for positioning using a downlink reference signal can be set and that indicates that a MAC-CE requesting the measurement gap can be transmitted, and that includes information indicating the measurement gap in the MAC-CE and transmits it, and a receiver that receives the reference signal in the measurement gap.

Description

[Technical Field]

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

[0002] The 3GPP (3rd Generation Partnership Project) is currently studying a wireless communication system called 5G or NR (New Radio) (hereinafter referred to as "NR") in order to achieve even larger system capacity, even faster data transmission speeds, and even lower latency in wireless sections. Various wireless technologies and network architectures are being studied for 5G to meet the requirements of achieving a throughput of 10 Gbps or more while keeping latency in wireless sections to 1 ms or less.

[0003] Furthermore, studies are underway on positioning, which uses reference signals, etc. One positioning method, for example, is one in which a terminal receives downlink (DL) reference signals (DL-PRS (Positioning Reference Signal)) from multiple base stations and performs positioning based on the time difference between the reception timings, etc. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.331 V16.5.0 (2021-06) Summary of the Invention [Problem to be solved by the invention]

[0005] In Rel-16 NR, a terminal receives a reference signal using a Measurement Gap (MG) for DL ​​positioning and performs positioning. Rel-16 NR specifies that a terminal transmits an MG request (specifically, LocationMeasurementInfo) to a base station by RRC signaling (Non-Patent Document 1).

[0006] Since RRC signaling has a large delay, MG requests using low-delay signaling are being studied to reduce the delay.

[0007] Specifically, "Option 1: MG request from LMF (Location Management Function) to base station via NRPAa message" and "Option 2: MG request from terminal to base station via UCI or UL MAC CE" have been proposed. However, terminal operation for Option 1 and Option 2 is not clear. As a result, there is a possibility that the terminal will not be able to properly receive reference signals for positioning.

[0008] The present invention has been made in view of the above points, and has an object to provide a technique that enables a terminal to properly receive a reference signal for positioning. [Means for solving the problem]

[0009] According to the disclosed technology, a transmitter transmits terminal capability information indicating that a measurement gap for positioning using a downlink reference signal can be set, the terminal capability information indicating that a MAC-CE requesting the measurement gap can be transmitted, and transmits information indicating the measurement gap by including it in the MAC-CE; a receiver for receiving the reference signal in the measurement gap; A terminal is provided, comprising: [Effects of the Invention]

[0010] According to the disclosed technology, a terminal can properly receive a reference signal for positioning. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 3] 1 is a diagram illustrating a basic operation of a wireless communication system according to an embodiment of the present invention. [Figure 4] FIG. 10 is a diagram for explaining an example of operation in the first embodiment. [Figure 5] FIG. 10 is a diagram for explaining an example of operation in the first embodiment. [Figure 6] FIG. 2 is a diagram for explaining an example of operation in the first embodiment. [Figure 7] FIG. 2 is a diagram for explaining an example of operation in the first embodiment. [Figure 8] FIG. 10 is a diagram for explaining an example of operation in the second embodiment. [Figure 9] FIG. 10 is a diagram for explaining an example of operation in the second embodiment. [Figure 10] FIG. 10 is a diagram for explaining an example of operation in the third embodiment. [Figure 11] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 12] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 13] FIG. 2 is a diagram illustrating an example of a functional configuration of an LMF 30 according to an embodiment of the present invention. [Figure 14] 2 is a diagram illustrating an example of a hardware configuration of a base station 10, a terminal 20, or an LMF 30 according to an embodiment of the present invention. [Figure 15] FIG. 1 is a diagram illustrating an example of a vehicle. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0013] (System Configuration) Fig. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. The core network is also provided with an LMF 30, which is capable of communicating with the base station 10. The LMF 30 may also communicate with the base station 10 via an AMF.

[0014] 1 shows one base station 10 and one terminal 20, this is an example and there may be a plurality of each. For example, there may be a plurality of base stations 10 that are transmission sources of DL-PRS received by the terminal 20.

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

[0016] Base station 10 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with terminal 20. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used.

[0017] The base station 10 transmits a synchronization signal, system information, and the like to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, on the NR-PBCH or PDSCH, and is also called broadcast information. As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 on the DL (Downlink) and receives control signals or data from the terminal 20 on the UL (Uplink). Note that, here, what is transmitted on a control channel such as the PUCCH or PDCCH is called a control signal, and what is transmitted on a shared channel such as the PUSCH or PDSCH is called data, but these names are merely examples. Furthermore, UCI (Uplink Control Information) is transmitted on the PUCCH or PUSCH.

[0018] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the 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. The terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.

[0019] Terminal 20 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with base station 10. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used. Also, a PUCCH-SCell having a PUCCH may be used.

[0020] The LMF 30 is a function that controls communications related to location information services defined in 5GC. The LMF 30 may also be called a location management server or a location management device. As will be described later, the LMF 30 transmits an MG request to the base station 10. However, the device that transmits the MG request to the base station 10 on the network side is not limited to the LMF. A device other than the LMF may also transmit the MG request to the base station 10.

[0021] Fig. 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is implemented. As shown in Fig. 2, a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided. The base station 10A and the base station 10B are each connected to a core network 40. A terminal 20 can communicate with both the base station 10A and the base station 10B.

[0022] A cell group provided by base station 10A, which is an MN, is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is an SN, is called an SCG (Secondary Cell Group). In addition, in a DC, an MCG is composed of one PCell and one or more SCells, and an SCG is composed of one PSCell (Primary SCell) and one or more SCells.

[0023] The processing operations in this embodiment may be executed in the system configuration shown in FIG. 1, in the system configuration shown in FIG. 2, or in any other system configuration.

[0024] (Basic operation example) In this embodiment, terminal 20 receives DL-PRS using a Measurement Gap (MG) for DL ​​positioning.

[0025] The terminal 20 is capable of performing the operations described in the following embodiments, and is also capable of performing the operations specified in Rel-16 NR (Non-Patent Document 1, etc.).

[0026] As an operation specified in Rel-16 NR, terminal 20 transmits an MG request (specifically, LocationMeasurementInfo) by RRC signaling to base station 10. The MG request (LocationMeasurementInfo) includes a carrier (ARFCN, etc.) to be used for measuring DL-PRS, an MG periodicity, an MG time offset, an MG length, etc.

[0027] For example, the base station 10 that receives the MG request transmits the DL-PRS in the MG specified in the MG request, and the terminal 20 receives the DL-PRS in the MG specified in the MG request.

[0028] Furthermore, in this embodiment, as already explained, it is possible to execute either Option 1 or Option 2 below, or both Option 1 and Option 2.

[0029] Option 1: The LMF 30 sends an MG request to the base station 10, for example, by an NRPAa message.

[0030] Option 2: The terminal 20 transmits an MG request to the base station 10 using the UCI or UL MAC CE.

[0031] 3 is a diagram summarizing the above operations. The MG request in option 1 (LMF -> gNB) includes, for example, one or more pieces of information from the MG period, the MG length, the MG offset, and the carrier of the DL-PRS that the terminal 20 (UE) measures in the MG. The MG request may further include more detailed setting information of the DL-PRS.

[0032] In option 1, the base station 10 (gNB) may transmit information included in the MG request received from the LMF 30 to the terminal 20. At this time, the information transmitted from the base station 10 to the terminal 20 may be an instruction to "perform DL-PRS measurement using that information," or may be configuration information for performing DL-PRS measurement. If the information is configuration information for performing DL-PRS measurement, the terminal 20 may transmit an MG request to the base station 10 requesting MG with that configuration information.

[0033] Furthermore, the MG request in option 1 (LMF -> gNB) may include multiple pieces of configuration information. For example, two pieces of configuration information 1 and 2 may be included in the MG request, where configuration information 1 = {MG period 1, MG length 1, MG offset 1, carrier 1} and configuration information 2 = {MG period 2, MG length 2, MG offset 2, carrier 2}. In this case, the base station 10 (gNB) may transmit to the terminal 20 all or part of the multiple pieces of configuration information included in the MG request received from the LMF 30. At this time, the information transmitted from the base station 10 to the terminal 20 may be an instruction to "perform DL-PRS measurement using that configuration information," or may be configuration information for performing DL-PRS measurement. If the configuration information is for performing DL-PRS measurement, the terminal 20 may transmit an MG request to the base station 10 requesting MG with that configuration information.

[0034] The MG request in option 2 (UE -> gNB) includes, for example, one or more pieces of information among the MG period, the MG length, the MG offset, and the carrier of the DL-PRS that the terminal 20 (UE) measures in the MG. The MG request may further include more detailed setting information of the DL-PRS.

[0035] Furthermore, in a step before the MG request in Option 2 (UE -> gNB), one or more pieces of configuration information may be transmitted from the base station 10 to the terminal 20. Each piece of configuration information includes, for example, one or more pieces of information from {MG period, MG length, MG offset, DL-PRS carrier measured by the terminal 20 (UE) in MG}.

[0036] In Option 1 and Option 2, when MG setting information is transmitted from the base station 10 to the terminal 20, a number (index) may be assigned to each of the one or more pieces of setting information to be transmitted. By using this index, the terminal 20 that has received the plurality of pieces of setting information can transmit to the base station 10 an MG request indicating which of the plurality of pieces of setting information to use for DL-PRS measurement.

[0037] (Summary of the Example) Hereinafter, examples of the operation of the terminal 20 related to the above-mentioned options 1 and 2 will be described in Examples 0 to 3. The operation of Examples 0 to 3 is outlined below. Hereinafter, the above-mentioned option 1 will be referred to as an "LMF-initiated MG request", and option 2 will be referred to as a "UE-initiated MG request". Also, "A / B" means "A or B, or A and B". Furthermore, in the following description, for the sake of convenience, regarding communication between the terminal 20 and the base station 10, it is shown that the terminal 20 communicates with one base station 10, but the terminal 20 may also perform the operation described below with each of multiple base stations that are the transmission sources of DL-PRS.

[0038] Example 0 (high level proposal): The terminal 20 requests MG from the base station 10 by RRC / MAC-CE / UCI, and assumes positioning.

[0039] Example 1: When multiple MG configurations are configured in the terminal 20, the terminal 20 requests, for example, one or multiple MG configurations from the base station 10 using RRC / MAC-CE / UCI.

[0040] Example 2: When the terminal 20 supports both an LMF-initiated MG request and a UE-initiated MG request, for example, the terminal 20 simultaneously assumes both of these MG requests.

[0041] Example 3: When both an LMF-initiated MG request and a UE-initiated MG request are set for the terminal 20, the priority of the MG request (MG setting information) applied by the terminal 20 is defined in the specifications, or the priority is set from the base station 10 (network) to the terminal 20. Also, the priority may be notified from the LMF 30 to the terminal 20. Each example will be described in detail below.

[0042] (Example 0) In Example 0, the terminal 20 requests MG from the base station 10 by RRC / MAC-CE / UCI, and assumes positioning. Specifically, for example, when the terminal 20 transmits an MG request for a certain MG to the base station 10 by MAC-CE / UCI, the terminal 20 performs the operation of Option 1 or Option 2 below.

[0043] Option 1: The terminal 20 is only expected to receive the DL-PRS in the requested MG. That is, the base station 10 transmits the DL-PRS in the MG, and the terminal 20 receives the DL-PRS in the MG.

[0044] Option 2: The terminal 20 assumes that it will receive the DL-PRS and other DL signals (e.g., SSB) in the requested MG. That is, the terminal 20 receives the DL-PRS and other DL signals in the MG.

[0045] Whether the terminal 20 implements option 1 or option 2 is defined in the specification, and the terminal 20 may implement either option 1 or option 2 in accordance with the definition.

[0046] Furthermore, information specifying whether terminal 20 implements option 1 or option 2 may be set / updated / specified by base station 10 to terminal 20 via RRC / MAC-CE / DCI. Terminal 20 implements either option 1 or option 2 according to the information.

[0047] Furthermore, the terminal 20 may transmit to the base station 10 capability information (UE capability) indicating whether it supports option 1 or option 2, or whether it supports both.

[0048] Furthermore, it may be assumed that the terminal 20 is configured with an MG that assumes the above option 1 / option 2 (e.g., an MG dedicated to positioning) set by the NW (base station 10) in addition to the MG used for purposes other than positioning.

[0049] An example of an operation sequence in Example 0 is shown in Fig. 4. Fig. 4 shows the case of Option 1. In S1, terminal 20 transmits an MG request to base station 10. As a result, terminal 20 assumes that it will receive only DL-PRS in the requested MG. In S2, terminal 20 receives DL-PRS transmitted from base station 10, and performs positioning in S3.

[0050] Furthermore, for example, the terminal 20 may transmit capability information indicating that the terminal 20 can transmit an MG request using any one or more of RRC, MAC-CE, and UCI to the network.

[0051] Furthermore, for example, the terminal 20 may transmit to the base station 10 capability information indicating that the base station 10 can set configuration information for up to N_MG MGs.

[0052] As N_MGs assumed by the terminal 20, there are, for example, the following options 1 to 4. The terminal 20 assumes one of the options 1 to 4.

[0053] Option 1: Number of existing MGs (MGs requested only by RRC) + number of MGs requested by MAC-CE / UCI.

[0054] Option 2: Number of MGs requested by MAC-CE / UCI.

[0055] Option 3: Number of existing MGs (MGs requested only by RRC) + number of MGs dedicated to positioning set from the network.

[0056] Option 4: The number of MGs dedicated to positioning is set from the network.

[0057] FIG. 5 shows an example of operation when the terminal 20 transmits capability information for notifying the above-mentioned N_MG to the base station 10.

[0058] At S0, terminal 20 transmits capability information including N_MG to base station 10. At S1, base station 10 transmits configuration information of one or more MGs to terminal 20. This number of MGs is equal to or less than N_MG. At S2, terminal 20 transmits an MG request to base station 10. The MG request includes information specifying a certain MG in the configuration information of multiple MGs received at S1.

[0059] In the case of the above Option 1, in S2, the terminal 20 requests MG via RRC to the base station 10, and may also request MG via MAC-CE / UCI. The terminal 20 receives the DL-PRS in S3 and performs positioning in S4.

[0060] According to the embodiment 0, the terminal 20 can make a positioning request with less delay than an MG request using only RRC.

[0061] Example 1 Next, Example 1 will be described. In Example 1, when configuration information of a plurality of MGs (MG configurations) is set in the terminal 20, the terminal 20 requests the base station 10 to set one or more MGs by using RRC / MAC-CE / UCI.

[0062] For example, the terminal 20 may select one MG from among the plurality of MGs set by the base station 10 by using RRC / MAC-CE / UCI, and transmit the configuration information of the selected MG to the base station 10 as an MG request. This configuration information may be an index indicating the configuration information of the specified MG.

[0063] Also, the terminal 20 may select X MGs from among the plurality of MGs (MG config.) set by the base station 10, transmit information indicating the X MGs to the base station 10 as an MG request, and then transmit an MG request specifying Y MGs out of the X MGs to the base station 10 by using MAC-CE (or UCI).

[0064] Y is an integer satisfying 1 < Y < X. Note that Y may be 1. In this example, for example, the MG request by using RRC means notifying the base station 10 of the settings of the X MGs, and the MG request by using MAC-CE (UCI) may be for activating or updating or specifying Y MGs out of the X MGs.

[0065] Also, after transmitting the configuration information of the X MGs to the base station 10 as an MG request, the terminal 20 may transmit an MG request specifying one MG out of the X MGs to the base station 10 by using UCI.

[0066] Furthermore, the terminal 20 may select X MGs from among a plurality of MGs configured by the base station 10, transmit configuration information for the X MGs as an MG request to the base station 10, transmit MG requests specifying Y MGs out of the X MGs to the base station 10 by MAC-CE, and then transmit an MG request specifying one MG out of the Y MGs to the base station 10 by UCI.

[0067] An MG request at the UCI may activate, update or indicate the configuration of one MG.

[0068] Furthermore, the terminal 20 may notify the base station 10 of the values ​​of X and Y (or a range of values) that the terminal 20 supports as capability information.

[0069] After transmitting an MG request to the base station 10, the terminal 20 may assume the operation of option 1 or option 2 below.

[0070] Option 1: The terminal 20 performs measurements corresponding to the MG setting specified by the MG request to the base station 10. For example, the terminal 20 performs measurements of the DL-PRS in the MG according to the MG setting and on the carrier specified in the MG setting.

[0071] Option 2: The terminal 20 performs measurements based on the settings / instructions received from the base station 10 after transmitting an MG request to the base station 10.

[0072] An example of operation in Option 1 above is shown in Figure 6. This shows an example of transmitting an MG request using RRC and MAC-CE. In S101, configuration information for multiple MGs is transmitted from base station 10 to terminal 20. In S102, terminal 20 transmits an MG request including configuration information for X MGs to base station 10 using RRC.

[0073] In S103, the terminal 20 transmits, by MAC-CE, an MG request including setting information for Y MGs out of the X MGs to the base station 10. The Y MGs are activated in S103. In S104, the terminal 20 receives DL-PRS using the activated Y MGs, and performs positioning in S105.

[0074] An example of operation in Option 2 above is shown in Figure 7. In S111, configuration information for multiple MGs is transmitted from the base station 10 to the terminal 20. In S112, the terminal 20 transmits an MG request including configuration information for one or multiple MGs to the base station 10 by RRC / MAC-CE / UCI. This allows the base station 10 to know candidates for MG configuration that the terminal 20 wishes to apply.

[0075] In S113, the base station 10 transmits information on one or more MGs to be applied to the terminal 20. This information is transmitted by RRC / MAC-CE / DCI.

[0076] In S114, the terminal 20 receives the DL-PRS using the MG set / specified in S113, and performs positioning in S115.

[0077] According to the first embodiment, the terminal 20 can select (or determine) a desired MG configuration and notify the base station 10 of it by MAC-CE / UCI.

[0078] Example 2 Next, a description will be given of Example 2. In Example 2, when the terminal 20 supports both an LMF-initiated MG request and a UE-initiated MG request, for example, the terminal 20 simultaneously assumes both of these MG requests. In Example 2, Examples 2-1, 2-2, and 2-3 will be described.

[0079] <Example 2-1: When UE-initiated MG request=enable / disable is set> For example, when UE-initiated MG request=enable (to apply UE-initiated MG request) is set from the base station 10 to the terminal 20, the terminal 20 implements one of the following options 1 to 3. Note that when UE-initiated MG request=disable (to not apply UE-initiated MG request) is set from the base station 10 to the terminal 20, the terminal 20 may implement one of the following options 1 to 3.

[0080] Option 1: The terminal 20 assumes that an LMF-initiated MG request is not made. That is, it assumes that LMF-initiated MG request=disable. Specifically, the terminal 20 can assume that MG setting information related to the LMF-initiated MG request is not set / instructed to the terminal 20 by the base station 10.

[0081] In this case, for example, an LMF-initiated MG request is not transmitted from the LMF 30 to the base station 10. Alternatively, an LMF-initiated MG request may be transmitted from the LMF 30 to the base station 10, and the base station 10 may not transmit, to the terminal 20, the MG setting information instructed by the LMF-initiated MG request.

[0082] Option 2: The terminal 20 assumes that an LMF-initiated MG request is made. That is, it assumes that LMF-initiated MG request=enable. Specifically, the terminal 20 can assume that MG setting information related to the LMF-initiated MG request is set / specified to the terminal 20 by the base station 10.

[0083] In this case, for example, an LMF-initiated MG request is transmitted from the LMF 30 to the base station 10, and the base station 10 transmits to the terminal 20 the MG setting information instructed by the LMF-initiated MG request.

[0084] Option 3: It is assumed that the terminal 20 is configured to enable / disable the LMF-initiated MG request from the base station 10. For example, the terminal 20 receives from the base station 10 setting information indicating whether to enable or disable the LMF-initiated MG request.

[0085] An example of operation in Example 2-1 is shown in Fig. 8. Here, it is assumed that operation of Option 2 is performed. In S201, the base station 10 sets, for example, UE-initiated MG request = enable to the terminal 20. In S202, an MG request (LMF-initiated MG request) is transmitted from the LMF 30 to the base station 10. This MG request includes MG setting information requested / recommended / proposed by the LMF 30.

[0086] In S203, the base station 10 transmits setting information of one or more MGs to the terminal 20. The setting information of one or more MGs includes, for example, setting information of the MG related to the LMF-initiated MG request.

[0087] In S204, the terminal 20 selects, for example, the setting information of one MG from one or more MGs set by the base station 10, and notifies the base station 10 of this as an MG request. In S205, the terminal 20 assumes that there is a DL-PRS in the MG requested in S204, and measures the DL-PRS in S205.

[0088] <Example 2-2: When LMF-initiated MG request = enable / disable is set> For example, when LMF-initiated MG request=enable (to apply an LMF-initiated MG request) is set from the base station 10 to the terminal 20, the terminal 20 implements one of the following options 1 to 3. Note that when LMF-initiated MG request=disable (to not apply an LMF-initiated MG request) is set from the base station 10 to the terminal 20, the terminal 20 may also implement one of the following options 1 to 3.

[0089] Option 1: It is assumed that the terminal 20 does not perform a UE-initiated MG request, that is, it is assumed that UE-initiated MG request = disable.

[0090] Option 2: It is assumed that the terminal 20 makes a UE-initiated MG request, that is, it is assumed that UE-initiated MG request = enable.

[0091] Option 3: It is assumed that the terminal 20 is configured to enable / disable the UE-initiated MG request from the base station 10. For example, the terminal 20 receives from the base station 10 configuration information indicating whether to enable or disable the UE-initiated MG request.

[0092] <Example 2-3> In Example 2-3, the terminal 20 determines an operation after a UE-initiated MG request depending on whether the LMF-initiated MG request is enable or disable. The terminal 20 may determine whether the LMF-initiated MG request is enable or disable based on the enable / disable setting of the UE-initiated MG request as in Example 2-1, or may determine based on the enable / disable setting of the LMF-initiated MG request as in Example 2-2.

[0093] For example, the terminal 20 determines to perform the operation of option 1 in the first embodiment if LMF-initiated MG request=disable, and determines to perform the operation of option 2 in the first embodiment if LMF-initiated MG request=enable.

[0094] An example of operation when LMF-initiated MG request=enable is shown in Fig. 9. In S211, the base station 10 sets, for example, UE-initiated MG request=enable to the terminal 20. In S212, an MG request (LMF-initiated MG request) is transmitted from the LMF 30 to the base station 10. This MG request includes MG setting information requested / recommended / proposed by the LMF 30.

[0095] In S213, one or more pieces of MG setting information are transmitted from the base station 10 to the terminal 20. The one or more pieces of MG setting information include, for example, MG setting information related to the LMF-initiated MG request.

[0096] In S214, the terminal 20 notifies the base station 10 of an MG request. This MG request includes, for example, setting information for the MG proposed by the terminal 20. In S215, for example, the base station 10 transmits to the terminal 20 an instruction to use the MG proposed by the terminal 20. In S215, the base station 10 may instruct the terminal 20 to use an MG setting different from the MG proposed by the terminal 20.

[0097] In S216, the terminal 20 assumes that there is a DL-PRS in the MG set / instructed by the base station 10, and measures the DL-PRS.

[0098] According to the second embodiment, the operation of the terminal 20 that supports both the LMF-initiated MG request and the UE-initiated MG request becomes clear.

[0099] Example 3 In either case of Examples 2-1 and 2-2, in Option 2 and Option 3, there is a possibility that both the MG related to the UE-initiated MG request and the MG related to the LMF-initiated MG request are set in the terminal 20. An example of processing operation in such a case will be described. Below, Examples 3-1 and 3-2 will be described.

[0100] <Example 3-1> When both the MG related to the UE-initiated MG request and the MG related to the LMF-initiated MG request are configured in the terminal 20, for example, the priority of the MG request (MG setting) applied by the terminal 20 is specified in the specifications, and the terminal 20 operates in accordance with the specification.

[0101] For example, if MG1 and MG2 are configured for terminal 20 as the configuration information of MG candidates for a UE-initiated MG request, and MG3 is configured as the configuration information of the MG by an LMF-initiated MG request, and if the specifications stipulate that the "UE-initiated MG request" is to be applied with the highest priority, terminal 20 applies MG1 or MG2. In other words, for example, an MG request specifying MG1 or MG2 is transmitted to base station 10.

[0102] Furthermore, when both the MG related to the UE-initiated MG request and the MG related to the LMF-initiated MG request are configured in the terminal 20, for example, the priority of the MG request (MG configuration) applied by the terminal 20 may be configured (or updated or instructed) to the terminal 20 from the base station 10 (network). The configuration / update / instruction is performed, for example, by RRC / MAC-CE / DCI. Alternatively, the priority may be notified from the LMF 30 to the terminal 20. The notification is performed, for example, by LPP.

[0103] For example, if MG1 and MG2 are configured for terminal 20 as the configuration information of MG candidates for a UE-initiated MG request, and MG3 is configured as the MG configuration information for an LMF-initiated MG request, and if base station 10 configures terminal 20 to apply the "LMF-initiated MG request" with the highest priority, terminal 20 will apply MG3.

[0104] An example of the operation of the embodiment 3-1 will be described with reference to FIG.

[0105] In S301, the base station 10 sets configuration information for a plurality of MGs that are candidates for a UE-initiated MG request, for example, to the terminal 20. In S302, an MG request (LMF-initiated MG request) is transmitted from the LMF 30 to the base station 10. This MG request includes the MG configuration information requested / recommended / proposed by the LMF 30.

[0106] In S303, the base station 10 transmits to the terminal 20 the MG setting information related to the LMF-initiated MG request.

[0107] Here, it is assumed that the specifications stipulate that a UE-initiated MG request is given priority over an LMF-initiated MG request. In S304, the terminal 20 determines that the UE-initiated MG request is given priority. In S305, the terminal 20 selects an MG to be applied from the multiple MGs set in S301, and transmits an MG request specifying that MG to the base station 10. It is assumed that the terminal 20 will perform DL-PRS reception using the MG requested in S305. In S306, the terminal 20 performs DL-PRS reception using the MG requested in S305.

[0108] <Example 3-2> The terminal 20 may determine the priority based on the settings of the MG (for example, PRS type, PRS symbol length, PRS repetition length, priority indicator, config.ID, etc.).

[0109] For example, the terminal 20 determines that an MG in which only DL-PRS Rx is configured has a higher (or lower) priority than other MGs. In this case, when making a high-priority MG request, the terminal 20 transmits an MG request specifying an MG in which only DL-PRS Rx is configured.

[0110] Furthermore, for example, the terminal 20 may determine that, among multiple MG configurations, the MG configuration with the maximum (or minimum) PRS symbol length has a higher priority than other MG configurations. Note that using the PRS symbol length as a parameter used for priority determination is merely an example. Other parameters may also be used for priority determination. Other parameters may include the MG period, the MG length, etc.

[0111] According to the third embodiment, the operation of the terminal 20 that supports both the LMF-initiated MG request and the UE-initiated MG request becomes clear.

[0112] (Other examples and variations) Below, examples (variations) that can be applied to any of Examples 0 to 3 will be described.

[0113] In this embodiment, DL-PRS is used as the DL reference signal used for positioning, but this is just an example, and a DL reference signal different from DL-PRS may be used instead of DL-PRS.

[0114] Furthermore, the MG request in this embodiment is not limited to a signal / message having a function of requesting the application of a certain MG to the base station 10. The MG request may be a signal / message having a function of proposing, recommending, or instructing the base station 10 to apply a certain MG.

[0115] Although the wireless communication system of this embodiment is assumed to be an NR system, the technology according to the present invention is not limited to NR and can be applied to other systems. Furthermore, a plurality of systems may coexist. For example, the technology according to the present invention can be applied to a system in which LTE and NR coexist.

[0116] Furthermore, the "setting information" used in this embodiment may be a number (index) that specifies specific information (for example, a set of MG period, MG length, offset, carrier, etc.).

[0117] Furthermore, the word "request" appearing in this specification may be replaced with "trigger," "activate," "update," "indicate," etc. Furthermore, "gNB" (base station) may be replaced with "TRP," "RP (Reception Point)," etc. Furthermore, "UE-initiated MG" may be replaced with "UE based MG," "UE triggering MG," "UE requesting MG," etc. Furthermore, "LMF-initiated MG" may be replaced with "LMF based MG," "LMF triggering MG," "LMF requesting MG," etc. Furthermore, "assuming" in this specification may be replaced with "determining."

[0118] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10, terminal 20, and LMF 30 (location management device) that execute the processes and operations described above. The base station 10, terminal 20, and LMF 30 include functions for implementing all of the above-described embodiments. However, the base station 10, terminal 20, and LMF 30 may each include only the functions of any of the embodiments.

[0119] <Base station 10> Fig. 11 is a diagram showing an example of the functional configuration of the base station 10. As shown in Fig. 11, 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 Fig. 11 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations related to the embodiment of the present invention. The transmitting unit 110 and the receiving unit 120 may be called a communication unit.

[0120] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals. The transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to the terminal 20. The transmitter 110 and the receiver 120 also communicate with the LMF 30.

[0121] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device, and reads out the information from the storage device as needed. The control unit 140 performs, for example, resource allocation and overall control of the base station 10. Note that the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120. Furthermore, the transmitting unit 110 and the receiving unit 120 may be referred to as a transmitter and a receiver, respectively. Furthermore, the function of the setting unit 130 may be included in the control unit 140.

[0122] <Terminal 20> Fig. 12 is a diagram showing an example of the functional configuration of the terminal 20. As shown in Fig. 12, the 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 Fig. 12 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention. The transmitting unit 210 and the receiving unit 220 may be called a communication unit.

[0123] The transmitter 210 generates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also transmits DL-PRS.

[0124] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device, and reads it out from the storage device as needed. The setting unit 230 also stores setting information that is set in advance. The control unit 240 performs overall control of the terminal 20, etc. The control unit 240 can also perform positioning processing. Note that the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220. The transmitting unit 210 and the receiving unit 220 may also be called a transmitter and a receiver, respectively. The function of the setting unit 230 may also be included in the control unit 240.

[0125] <lmf30> Fig. 13 is a diagram showing an example of the functional configuration of the LMF 30. As shown in Fig. 13, the LMF 30 has a transmitting unit 310, a receiving unit 320, a setting unit 330, and a control unit 340. The functional configuration shown in Fig. 13 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. The transmitting unit 110 and the receiving unit 120 may be called a communication unit.

[0126] The transmitting unit 310 generates a signal to be transmitted to the base station 10 and transmits the signal. The receiving unit 320 receives various signals. The setting unit 330 stores preset setting information and various generated setting information in a storage device and reads it from the storage device as needed. The control unit 340 controls the entire LMF 30. Note that the function unit related to signal transmission in the control unit 340 may be included in the transmitting unit 310, and the function unit related to signal reception in the control unit 340 may be included in the receiving unit 320. Furthermore, the transmitting unit 310 and the receiving unit 320 may be called a transmitter and a receiver, respectively. Furthermore, the function of the setting unit 330 may be included in the control unit 340.

[0127] The terminal 20 and the base station 10 may be configured as the terminals and base stations described in the following sections, for example. (Section 1) a transmitter that transmits information indicating a measurement gap for positioning using a downlink reference signal to a base station using MAC-CE or UCI; a control unit that assumes that the reference signal is received in the measurement gap; A terminal comprising: (Section 2) a receiving unit that receives, from a base station, a plurality of pieces of measurement gap setting information for positioning using a downlink reference signal; a transmitting unit that transmits information specifying one or more pieces of setting information to a base station; A terminal comprising: (Section 3) a control unit that assumes that the reference signal is received in a measurement gap based on the information, or that the reference signal is received based on information received from the base station after transmitting the information. 3. The terminal according to claim 2, further comprising: (Section 4) a receiving unit that receives configuration information indicating that one of a first measurement gap application method that applies a measurement gap based on a request from a terminal to a base station and a second measurement gap application method that applies a measurement gap based on a request from a location management device to a base station is valid; a control unit that assumes that a measurement gap application method other than the measurement gap application method that is set to be valid is not valid; A terminal comprising: (Section 5) a receiving unit that receives first measurement gap configuration information related to a first measurement gap application method that applies a measurement gap based on a request from a terminal to a base station and second measurement gap configuration information related to a second measurement gap application method that applies a measurement gap based on a request from a location management device to a base station; a control unit that determines priorities for the first measurement gap and the second measurement gap based on a rule or setting; A terminal comprising: (Section 6) a receiving unit that receives information indicating a measurement gap for positioning using a downlink reference signal from a terminal using MAC-CE or UCI; a transmitter for transmitting the reference signal in the measurement gap; A base station comprising:

[0128] Any of the configurations described in the above paragraphs provides a technique that enables a terminal to properly receive a reference signal for positioning. Furthermore, paragraph 2 allows a quick measurement gap to be requested. The control unit that performs the assumption of paragraph 1 may instruct the receiving unit to set the reference signal to be received based on the assumption.

[0129] (Hardware configuration) The block diagrams (FIGS. 11 to 13) used in the description of the above embodiments show functional blocks. 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 may be realized using two or more devices that are physically or logically separated and connected directly or indirectly (for example, by wire, wirelessly, etc.). The functional block may be realized by combining software with the one device or the multiple devices.

[0130] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0131] For example, the base station 10, the terminal 20, the LMF 30, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 14 is a diagram illustrating an example of the hardware configuration of the base station 10, the terminal 20, and the LMF 30 according to an embodiment of the present disclosure. The base station 10, the terminal 20, and the LMF 30 described above 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.

[0132] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0133] Each function in the base station 10, terminal 20, and LMF 30 is realized by loading specified software (programs) onto hardware such as the processor 1001, memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and auxiliary memory device 1003.

[0134] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0135] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control units 140, 240, and 340 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0136] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0137] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The secondary storage device 1003 may also be referred to as an secondary storage device. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0138] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0139] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0140] 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 may be configured using different buses between each device.

[0141] Furthermore, base station 10, terminal 20, and LMF 30 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0142] 15 shows an example of the configuration of a vehicle 2001 according to this embodiment. As shown in FIG. 15, the vehicle 2001 includes 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 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example. The functions of the terminal 20 may be mounted on the communication module 2013.

[0143] The drive unit 2002 is configured, for example, by 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 operated by the user.

[0144] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0145] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0146] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing various types of information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information obtained from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001.

[0147] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0148] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0149] 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 an external device. For example, it transmits and receives various information to and from the external device 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, a mobile station, or the like.

[0150] The communication module 2013 transmits, via wireless communication to an external device, a current signal from the current sensor that is input to the electronic control unit 2010. The communication module 2013 also transmits, via wireless communication to an external device, the rotation speed signals of the front and rear wheels acquired by a rotation speed sensor 2022, the air pressure signals of the front and rear wheels acquired by an air pressure sensor 2023, the vehicle speed signal acquired by a vehicle speed sensor 2024, the acceleration signal acquired by an acceleration sensor 2025, the accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, the brake pedal depression amount signal acquired by a brake pedal sensor 2026, the shift lever operation signal acquired by a shift lever sensor 2027, and the detection signals for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 2028, which are input to the electronic control unit 2010.

[0151] The communication module 2013 receives various information (traffic information, traffic signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The communication module 2013 also stores the various information received from the external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the 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, axle 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0152] (Supplementary explanation of the embodiment) Although the 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, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, 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; features described in two or more items may be used in combination as needed, and features described in one item may also apply to features described in another item (unless inconsistent). The boundaries between functional units or processing sections in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10, terminal 20, and LMF 30 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each 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.

[0153] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0154] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), 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), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G) may also be applied.

[0155] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0156] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0157] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0158] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0159] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0160] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0161] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0162] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0163] Note that terms explained 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 a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0164] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0165] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0166] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUSCH, PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0167] In this disclosure, terms such as "base station (BS)," "radio 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.

[0168] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0169] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0170] 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, terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0171] 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, or the mobile body itself. 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 also include devices that do not necessarily move during communication operations. 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.

[0172] Furthermore, a base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0173] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station may be configured to have the functions of the terminal described above.

[0174] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0175] The terms "connected," "coupled," or any variation thereof, refer to 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" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0176] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0177] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0178] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0179] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0180] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0181] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed 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.

[0182] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0183] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0184] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot 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.

[0185] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0186] 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 minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0187] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0188] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0189] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0190] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0191] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0192] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0193] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0194] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0195] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0196] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0197] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0198] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0199] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio 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, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0200] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0201] In the present 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 "coupled" may also be interpreted in the same way as "different."

[0202] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0203] In the present disclosure, an SS block or a CSI-RS is an example of a synchronization signal or a reference signal.

[0204] Although the present disclosure has been described in detail above, it is 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 spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0205] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 30 LMF 310 Transmitter 320 Receiving Unit 330 Settings 340 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device

Claims

1. a transmitter that transmits terminal capability information indicating that a measurement gap for positioning using a downlink reference signal can be set, the terminal capability information indicating that a MAC-CE requesting the measurement gap can be transmitted, and that includes information indicating the measurement gap in the MAC-CE and transmits the information; a receiver for receiving the reference signal in the measurement gap; A terminal comprising:

2. the receiving unit receives configuration information of a plurality of measurement gaps for positioning using a downlink reference signal; the transmitter transmits a MAC-CE requesting one measurement gap among the plurality of measurement gaps. The terminal according to claim 1 .

3. the receiver receives a MAC-CE indicating a measurement gap to be applied; The terminal according to claim 2.

4. The terminal capability information indicates that the terminal can configure multiple measurement gaps for the positioning, and indicates that the terminal can transmit a MAC-CE requesting one of the multiple measurement gaps. The terminal according to claim 2.

5. a receiving unit that receives terminal capability information indicating that a measurement gap for positioning using a downlink reference signal can be set, the terminal capability information indicating that a MAC-CE requesting the measurement gap can be transmitted, and that receives a MAC-CE including information indicating the measurement gap; a transmitter that transmits the reference signal in the measurement gap; A base station comprising:

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