Terminal, wireless communication system, and wireless communication method

Abstract

This terminal transmits an uplink signal via an uplink and controls the transmission timing of the uplink signal. The terminal sets a timing value of the uplink signal on the basis of a reference signal referred to at the transmission of the uplink signal.

Description

[Technical Field]

[0001] The present disclosure relates to a terminal, a wireless communication system, and a wireless communication method. [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP) has developed specifications for the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)), and is also developing specifications for the next generation, known as Beyond 5G, 5G Evolution, or 6G.

[0003] For example, in 3GPP Release 15 and Release 16 (NR), a terminal (User Equipment, UE) can execute control to shift the start positions of radio frames in uplink (UL) and downlink (DL) (see Non-Patent Document 1). Specifically, the UE can change the transmission timing of an UL frame based on a Timing Advance (TA) value.

[0004] In addition, for next-generation specifications such as 6G, the introduction of reflectors (RIS: Reconfigurable Intelligent Surface) that can be attached to walls or window glass to control the reflection or transmission of radio waves to form areas while improving various wireless performance, and wireless communication using even more transmitting and receiving points (Multi-TRP) are being considered (Non-Patent Document 2). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 38.211 V16.6.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical channels and modulation (Release 16), 3GPP, June 2021 [Non-patent document 2] NTT Docomo, "Docomo 6G White Paper 3.0 Edition," [online], February 2021, Internet<URL:https: / / www.nttdocomo.co.jp / corporate / technology / whitepaper_6g / > Summary of the Invention

[0006] When RIS or Multi-TRP is introduced, it is expected that the number of line-of-sight (LOS) paths will increase in each section from TRP (which may include UE) to RIS to TRP. For example, by passing through RIS, the possibility of there being a path with a large delay but sufficient received power increases.

[0007] However, since the timing value (TA value) used to adjust the uplink transmission timing is fixed to one value within the same cell, there may be cases where it is not possible to cope with an increase in paths resulting in LOS.

[0008] Therefore, the following disclosure has been made in consideration of such circumstances, and aims to provide a terminal, a wireless communication system, and a wireless communication method that can set appropriate timing values ​​even when the number of LOS paths increases.

[0009] One aspect of the present disclosure is a terminal (UE 200) that includes a transmitter (radio signal transmitter / receiver 210) that transmits an uplink signal via an uplink, and a controller (controller 270) that controls the transmission timing of the uplink signal, and the controller sets different timing values ​​for each of the multiple uplink signals transmitted within the same cell.

[0010] One aspect of the present disclosure is a terminal (UE200) that includes a transmitter (radio signal transceiver 210) that transmits an uplink signal via an uplink, and a control unit (control unit 270) that controls the transmission timing of the uplink signal, and the control unit sets a different timing value for each destination of the uplink signal or for each transmission panel that transmits the uplink signal.

[0011] One aspect of the present disclosure is a terminal (UE 200) that includes a transmitter (radio signal transmitter / receiver 210) that transmits an uplink signal via an uplink, and a controller (controller 270) that controls the transmission timing of the uplink signal, and the controller sets different timing values ​​for each time resource.

[0012] One aspect of the present disclosure is a wireless communication system (wireless communication system 10) including a terminal and a wireless base station, wherein the terminal includes a transmitter (wireless signal transceiver 210) that transmits an uplink signal via an uplink and a controller (controller 270) that controls the transmission timing of the uplink signal, the wireless base station includes a receiver that receives the uplink signal, and the controller sets different timing values ​​for each of the multiple uplink signals transmitted within the same cell.

[0013] One aspect of the present disclosure is a wireless communication method that includes a step of transmitting an uplink signal via an uplink and a step of controlling the transmission timing of the uplink signal, wherein in the controlling step, different timing values ​​are set for each of the uplink signals transmitted within the same cell.

[0014] One aspect of the present disclosure is a terminal (UE 200) that includes a transmitter (radio signal transmitter / receiver 210) that transmits an uplink signal via an uplink, and a controller (controller 270) that controls the transmission timing of the uplink signal, and the controller sets the timing value of the uplink signal based on a reference signal that is referenced in the transmission of the uplink signal.

[0015] One aspect of the present disclosure is a terminal (UE 200) that includes a transmitter (radio signal transmitter / receiver 210) that transmits an uplink signal via an uplink, and a controller (controller 270) that controls the transmission timing of the uplink signal, and the controller sets the timing value of the uplink signal based on a spatial relationship with the uplink signal.

[0016] One aspect of the present disclosure is a terminal (UE 200) that includes a transmitter (radio signal transmitter / receiver 210) that transmits an uplink signal via an uplink, and a controller (controller 270) that controls the transmission timing of the uplink signal, and the controller sets the timing value of the uplink signal based on the content of downlink control information.

[0017] One aspect of the present disclosure is a wireless communication system (wireless communication system 10) including a terminal and a wireless base station, wherein the terminal includes a transmitter that transmits an uplink signal via an uplink and a control unit (control unit 270) that controls the transmission timing of the uplink signal, and the control unit sets a timing value of the uplink signal based on a reference signal that is referenced in transmitting the uplink signal.

[0018] One aspect of the present disclosure is a wireless communication method including a step of transmitting an uplink signal via an uplink and a step of controlling the transmission timing of the uplink signal, wherein in the controlling step, a timing value of the uplink signal is set based on a reference signal that is referenced in the transmission of the uplink signal. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a diagram showing the overall schematic configuration of a wireless communication system 10. As shown in FIG. [Figure 2] FIG. 2 is a diagram illustrating an example of a path configuration between the UE 200 and a transmission / reception point (TRP). [Figure 3] FIG. 3 is a diagram showing an example of the configuration of a radio frame, a subframe, and a slot used in the radio communication system 10. As shown in FIG. [Figure 4] Figure 4 is a functional block diagram of gNB100 and UE200. [Figure 5] FIG. 5 is a diagram showing an example of setting the TA value. [Figure 6] FIG. 6 is a diagram illustrating an example of correspondence between index, TA value, and PUCCH spatial relation according to the first operation example. [Figure 7] FIG. 7 is a diagram illustrating an example of a method for determining a TA value according to the second operation example. [Figure 8] FIG. 8 is a diagram illustrating an example of a method for determining a TA value according to the third operation example. [Figure 9] FIG. 9 is a diagram illustrating an example of a method for determining a TA value according to the fourth operation example. [Figure 10] FIG. 10 is a diagram illustrating an example of a method for determining a TA value according to the fifth operation example. [Figure 11] FIG. 11 is a diagram illustrating an example of the configuration of a path between the UE 200 and a transmission / reception point (TRP) according to the sixth operation example. [Figure 12] FIG. 12 is a diagram showing an example of the hardware configuration of gNB100 and UE200. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are used to designate the same functions or configurations, and descriptions thereof will be omitted as appropriate.

[0021] (1) Overall configuration of the wireless communication system 1 is a schematic diagram of the overall configuration of a wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system conforming to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20) and a terminal 200 (User Equipment 200, hereinafter, UE 200).

[0022] The wireless communication system 10 may be a wireless communication system conforming to a system called Beyond 5G, 5G Evolution, or 6G.

[0023] The NG-RAN 20 includes a radio base station 100 (hereinafter, gNB 100). Note that the specific configuration of the radio communication system 10, including the number of gNBs and UEs, is not limited to the example shown in FIG.

[0024] The NG-RAN 20 actually includes multiple NG-RAN nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). The NG-RAN 20 and the 5GC may also be simply referred to as a "network."

[0025] The gNB 100 is a radio base station that complies with NR and performs NR-compliant radio communication with the UE 200. The gNB 100 and the UE 200 are capable of supporting Massive MIMO, which generates a more directional beam (BM) by controlling radio signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which aggregates and uses multiple component carriers (CCs), and Dual Connectivity (DC), which simultaneously communicates between the UE and multiple NG-RAN nodes.

[0026] The wireless communication system 10 supports FR1 and FR2. The frequency bands of each FR (Frequency Range) are as follows:

[0027] FR1: 410 MHz to 7.125 GHz FR2: 24.25 GHz~52.6 GHz FR1 may use a Sub-Carrier Spacing (SCS) of 15, 30, or 60 kHz and a bandwidth (BW) of 5 to 100 MHz. FR2 is a higher frequency than FR1, and may use an SCS of 60 or 120 kHz (including 240 kHz) and a bandwidth (BW) of 50 to 400 MHz.

[0028] Furthermore, the wireless communication system 10 may also support a frequency band higher than the FR2 frequency band. Specifically, the wireless communication system 10 may support a frequency band exceeding 52.6 GHz up to 114.25 GHz. FR2 may also include FR2-1 (24.25 to 52.6 GHz) and FR2-2 (52.6 to 71 GHz).

[0029] Alternatively, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM) with a larger Sub-Carrier Spacing (SCS) may be applied. Furthermore, DFT-S-OFDM may be applied not only to the uplink (UL) but also to the downlink (DL).

[0030] 2 shows an example of the configuration of a path between the UE 200 and a transmission / reception point (TRP). As shown in FIG. 2, the wireless communication system 10 may include multiple transmission / reception points (TRPs), specifically, a TRP 101, a TRP 102, and a RIS 300. Note that the number of TRPs and RISs included in the wireless communication system 10 is not particularly limited. The TRP 101 and the TRP 102 (which may be interpreted as the gNB 100) can form a cell C1. The cell C1 may be a serving cell of the UE 200.

[0031] The TRP101 and TRP102 may be interpreted as components of the gNB100. The TRP101 and TRP102 may be installed in different geographical locations. The TRP101 and TRP102 may be interpreted as synonymous with an antenna device, an antenna panel, a transmitting panel, a panel, etc. The TRP101 and TRP102 can form a beam BM (see FIG. 1) directed in a predetermined direction. The UE200 may also have multiple transmitting panels.

[0032] RIS300 (Reconfigurable Intelligent Surface) can be interpreted as a type of reflector that can be attached to a wall or window glass to control the reflection or transmission of radio waves to form an area and improve various wireless performances. RIS300 can be used for distributed antenna deployment (Multi-TRP), which distributes and deploys multiple antenna devices, and for improving wireless performance. In addition to being a reflector, the RIS300 may also be called a battery-less device, metamaterial functional device, IRS (Intelligent Reflecting Surface), smart repeater, etc.

[0033] The RIS 300 may also have the following functions, for example.

[0034] (UE function) Reception function for signals transmitted from radio base stations (e.g., DL (downlink) signals, SSB (SS Block), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), DM-RS (DeModulation Reference Signal), PT-RS (Phase Tracking Reference Signal), CSI-RS (Channel Status Information Reference Signal), RIS-dedicated signals) This may include receiving information regarding the metamaterial functionality as follows:

[0035] - Signal transmission function to radio base stations (e.g., UL (uplink) signals, PRACH (Random Access Channel Preamble), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Control Channel), DM-RS, PT-RS, SRS (Sounding Reference Signal), RIS-dedicated signals) This may include transmitting information regarding the metamaterial functionality described below.

[0036] -Frame synchronization function with wireless base stations (Metamaterial function) Reflection functions (e.g. phase changes) of signals transmitted by the radio base station or UE Beam control functions (e.g., TCI (Transmission Configuration Indication)-state, QCL (Quasi Co Location) control functions, beam selection and application, spatial filter / precoding weight selection and application) Power modification functions for signals transmitted from a radio base station or UE (e.g. power amplification) Furthermore, "receive and transmit" or "relay" in the RIS 300 may mean that the following predetermined function A is executed, but the data is transmitted without executing the following predetermined function B.

[0037] A: A phase shifter is applied, but B: No compensation circuit (e.g., amplifier, filter) is used.

[0038] A: A phase shifter and compensation circuit are applied, but B: no frequency conversion is performed.

[0039] The RIS 300 may amplify the amplitude when the phase is changed. "Relay" may mean transmitting a received signal as is without performing processing at the layer 2 / 3 level, transmitting a received signal as is at the physical layer, or transmitting a received signal as is without signal interpretation (in which case, a phase change or amplitude amplification may be performed).

[0040] FIG. 3 shows an example of the configuration of a radio frame, a subframe, and a slot used in the radio communication system 10. In FIG.

[0041] As shown in Figure 3, one slot consists of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). Note that the number of symbols constituting one slot does not necessarily have to be 14 symbols (e.g., 28 or 56 symbols). The number of slots per subframe may differ depending on the SCS. Furthermore, the SCS may be wider than 240 kHz (e.g., 480 kHz or 960 kHz as shown in Figure 2).

[0042] The time direction (t) shown in Fig. 3 may be called a time domain, a time resource, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a frequency resource, a resource block, a subcarrier, a BWP (Bandwidth part), etc.

[0043] (2) Functional block configuration of wireless communication system Next, a functional block configuration of the wireless communication system 10 will be described. Specifically, a functional block configuration of the UE 200 will be described. FIG. 4 is a functional block configuration diagram of the gNB 100 and the UE 200.

[0044] As shown in FIG. 4, UE 200 includes a radio signal transmitting / receiving unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, an encoding / decoding unit 250, a data transmitting / receiving unit 260, and a control unit 270.

[0045] It should be noted that Fig. 4 shows only the main functional blocks relevant to the description of the embodiment, and that the UE 200 (gNB 100) has other functional blocks (e.g., a power supply unit, etc.). Fig. 4 shows the functional block configuration of the UE 200, and for the hardware configuration, please refer to Fig. 12.

[0046] The radio signal transmitting and receiving unit 210 transmits and receives radio signals conforming to NR. The radio signal transmitting and receiving unit 210 can support Massive MIMO, which generates a more directional beam by controlling radio (RF) signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which aggregates and uses multiple component carriers (CCs), and Dual Connectivity (DC), which simultaneously communicates between a UE and two NG-RAN nodes.

[0047] The radio signal transceiver 210 transmits an uplink signal via an uplink (UL) and receives a downlink signal via a downlink (DL). In this embodiment, the radio signal transceiver 210 may constitute a transmitter that transmits the uplink signal via the uplink.

[0048] Specifically, the radio signal transceiver 210 can transmit and receive radio frames, subframes, slots, and symbols shown in Fig. 2. The radio frames may include UL frames and DL frames. Furthermore, the uplink signals may include various UL channels (e.g., PUSCH / PUCCH).

[0049] Radio signal transceiver 210 can transmit a UL frame with the start position of the UL frame (for example, the position of Slot #0) shifted from the start position of the DL frame. The shift between the start position of the UL frame and the start position of the DL frame is called Timing Advance (TA), and the amount of this shift (time difference) may be called a TA value (timing value).

[0050] The amplifier unit 220 is configured by a PA (Power Amplifier) / LNA (Low Noise Amplifier), etc. The amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. The amplifier unit 220 also amplifies the RF signal output from the radio signal transmission / reception unit 210.

[0051] The modem unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (e.g., gNB 100). The modem unit 230 may apply Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM). Furthermore, DFT-S-OFDM may be used not only for uplink (UL) but also for downlink (DL).

[0052] The control signal / reference signal processor 240 performs processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200 .

[0053] Specifically, the control signal / reference signal processor 240 receives various control signals, for example, control signals of a radio resource control layer (RRC), transmitted via a predetermined control channel from the gNB 100. The control signal / reference signal processor 240 also transmits various control signals to the gNB 100 via a predetermined control channel.

[0054] The control signal / reference signal processor 240 performs processing using reference signals (RS) such as a Demodulation Reference Signal (DMRS) and a Phase Tracking Reference Signal (PTRS).

[0055] DMRS is a reference signal (pilot signal) known between the base station and the terminal for estimating the fading channel used for data demodulation. PTRS is a terminal-specific reference signal for estimating phase noise, which is an issue in high frequency bands.

[0056] In addition to the DMRS and PTRS, the reference signals may include a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information.

[0057] The channels include a control channel and a data channel. The control channels may include a PDCCH (Physical Downlink Control Channel), a PUCCH (Physical Uplink Control Channel), a RACH (Random Access Channel, Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI)), a Physical Broadcast Channel (PBCH), etc.

[0058] Furthermore, the data channel includes a PDSCH (Physical Downlink Shared Channel), a PUSCH (Physical Uplink Shared Channel), etc. Data may refer to data transmitted via a data channel.

[0059] Furthermore, the control signal and reference signal processor 240 can transmit, to the network, capability information (UE Capability Information) indicating the capability of the UE 200. In particular, in this embodiment, the control signal and reference signal processor 240 can transmit, to the network, capability information of the UE 200 related to the setting of a TA value (timing value). In this embodiment, the control signal and reference signal processor 240 may constitute a transmitter that transmits, to the network, the capability information of the terminal related to the setting of the timing value.

[0060] Specifically, control signal and reference signal processing unit 240 may include in the capability information whether multiple TA values ​​can be applied within a cell (serving cell or TAG (Timing Advance Group)), the types of parameters that can be used to determine the TA value, the maximum value of the configurable TA value, etc. The method of reporting the capability information will be described later.

[0061] The encoding / decoding unit 250 performs data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB100 or another gNB).

[0062] Specifically, the encoding / decoding unit 250 divides the data output from the data transmitting / receiving unit 260 into pieces of a predetermined size, performs channel coding on the divided data, decodes the data output from the modem unit 230, and concatenates the decoded data.

[0063] The data transmitter / receiver 260 transmits and receives Protocol Data Units (PDUs) and Service Data Units (SDUs). Specifically, the data transmitter / receiver 260 assembles and disassembles PDUs / SDUs in multiple layers (such as a Medium Access Control layer (MAC), a Radio Link Control layer (RLC), and a Packet Data Convergence Protocol layer (PDCP)). The data transmitter / receiver 260 also performs data error correction and retransmission control based on Hybrid Automatic Repeat Request (Hybrid ARQ).

[0064] The control unit 270 controls each functional block constituting the UE 200. In particular, in this embodiment, the control unit 270 controls the transmission timing of an uplink signal.

[0065] Specifically, the control unit 270 can set different TA values ​​(timing values) for multiple uplink signals transmitted within the same cell (for example, cell C1 (see FIG. 2)).

[0066] The multiple uplink signals may be interpreted as line-of-sight (LOS) paths from UE 200 to TRP 101 or TRP 102 shown in Fig. 2. Here, the LOS path may include uplink signals relayed (reflected) by RIS 300 (or other structures such as buildings). The uplink signals may be interpreted as (uplink) radio frames, subframes, slots, symbols, etc.

[0067] "Within the same cell" may be interpreted as within the same serving cell, or in a narrower sense, as within the same TAG. That is, the control unit 270 may set different TA values ​​for multiple uplink signals (radio frames, etc.) transmitted within the same serving cell (or the same TAG).

[0068] A TAG may be interpreted as a group identified by TAG identification information (TAG ID) and associated with a specific TA value. In this embodiment, multiple different TA values ​​may be set within a TAG (i.e., the same TAG ID). Alternatively, multiple TAG IDs may be assigned to one cell, and multiple TA values ​​may be set to one cell.

[0069] Furthermore, the control unit 270 can set the TA value of the uplink signal based on a reference signal (RS) referenced in transmitting the uplink signal. Specifically, the control unit 270 may determine the TA value of the uplink signal based on the state of RSs that have the same or similar spatial relation. Alternatively, the control unit 270 may determine the TA value of the uplink signal based on the state of RSs referenced when calculating the distance attenuation of the uplink signal. Alternatively, the control unit 270 may determine the TA value of the uplink signal based on the state of RSs referenced when calculating (setting) a precoder. Specific examples of RSs used in determining the TA value will be described later.

[0070] Furthermore, the control unit 270 may set the TA value of the uplink signal based on a spatial relation with the uplink signal. That is, the control unit 270 may determine the TA value of the uplink signal based on the spatial relation between the uplink signal and a predetermined RS, rather than the state of the RS. The spatial relation may mean, for example, that the UE 200 can transmit an uplink signal (specifically, a PUCCH, etc.) using the same beam BM as the beam BM used to receive the corresponding downlink signal.

[0071] The control unit 270 may determine the TA value of the uplink signal based on a TCI (Transmission Configuration Indication) state set as a quasi-collocation (QCL) and an RS that is a spatial relation with the uplink signal, or based on the QCL.

[0072] Furthermore, the control unit 270 may set the TA value of the uplink signal based on the content of Downlink Control Information (DCI) or the channel (PDCCH) on which the DCI is received. Specifically, the control unit 270 may set the TA value of the uplink signal based on the content of DCI received from the network (gNB100) or the channel (PDCCH) on which the DCI is received.

[0073] The control unit 270 may set a different TA value based on the content of a specific field included in the DCI, for example, for each pool index of a control resource set (CORESET), for each DMRS port, or for each SRS resource indicator (SRI). Alternatively, the control unit 270 may set the TA value based on the value of a dedicated bit field included in the DCI.

[0074] Furthermore, the control unit 270 may set a different TA value for each destination of the uplink signal or for each transmission panel that transmits the uplink signal. Specifically, the control unit 270 may set a different TA value depending on the TRP (TRP101 or TRP102) that is the destination of the uplink signal. Alternatively, the control unit 270 may set a different TA value depending on the transmission panel (antenna panel) of the UE 200 that transmits the uplink signal.

[0075] Furthermore, the control unit 270 may set a different TA value for each time resource. Specifically, the control unit 270 may set a different TA value for each predetermined time (or period). The predetermined time (period) may be, for example, the periodicity of an SSB (SS / PBCH Block) composed of a synchronization signal (SS) and a downlink physical broadcast channel (PBCH), a repetition period of a time division duplex (TDD) pattern, a predetermined number of radio frames, slots, or symbols, etc. Alternatively, the time resource to which an uplink signal is allocated may be used as a reference.

[0076] (3) Operation of the wireless communication system Next, a description will be given of the operation of the wireless communication system 10. Specifically, a description will be given of the operation relating to setting (determining) the TA value when many LOS paths exist due to the introduction of the RIS 300 and multiple TRPs (Multi-TRP).

[0077] (3.1) Prerequisites and Issues Fig. 5 shows an example of setting the TA value. As shown in Fig. 5, the UE 200 can apply TA that shifts the start positions of frames (radio frames) between the UL and DL.

[0078] In this embodiment, the TA value is N TA / N TA,offset / N TA + N TA,offset / (N TA + N TA,offset )T c In the conventional 3GPP specifications (such as TS38.211), N is used for each TAG. TA , N per serving cell TA, offset However, in this embodiment, as described above, multiple TA values ​​with different values ​​can be set even in the same TAG and / or the same serving cell. TAindicates the amount of timing adjustment notified in the MAC CE or RA Response, and N TA,offset is N TA Also, T c is a variable, (N TA + N TA,offset ) to T c For example, Tc may be set to 0.509 ns.

[0079] As described above, when the RIS 300 and multiple TRPs (Multi-TRPs) are introduced, the number of LOS paths may also increase. In particular, when transmitting and receiving highly directional signals amplified / reflected by the RIS 300, etc., there is a possibility that the signals may have sufficient received power despite the large delay.

[0080] However, in the conventional 3GPP specifications, the TA value that can be applied by the UE 200 is specific to the TAG, and therefore different TA values ​​cannot be applied in the same cell (which may be interpreted as a serving cell). Therefore, it may not be possible to include all of the multiple paths in the cyclic prefix (CP) length.

[0081] In the following operation example, such a problem is solved, and the UE 200 sets a TA value corresponding to transmission via multiple paths within the same cell.

[0082] (3.2) Example of operation Below, operation examples 1 to 7 regarding setting of a TA value corresponding to transmission over multiple paths within the same cell will be explained.

[0083] (3.2.1) Example 1 In this operation example, the UE 200 may set a plurality of TA values ​​in the same cell. Fig. 6 shows an example of the correspondence between the index, the TA value, and the spatial relation of the PUCCH according to the first operation example.

[0084] As shown in Fig. 6, different TA values ​​may be associated with Indexes 1 to 3. Specifically, the parameter TA is associated with different values ​​of 3, 5, and 7, and the TA value is TA·16·64 / 2 μ where TA represents a variable, and μ represents the SCS to be applied. TA valueIndex 1 and 3 may be associated with PUCCH-spatial relation info ID 1 and 2, respectively.

[0085] Furthermore, in operation examples 2 to 6 described later, when the UE 200 can set a TA value for each X, the UE 200 may set the TA value as follows: For example, different TA values ​​may be assigned to an index (TA value index), and which TA value index to apply for each X or for each group composed of X may be set in the UE 200 by higher layer signaling (such as RRC).

[0086] In this case, the TA valueIndex may be set for each TAG ID (cell group with the same TA), or the TA valueIndex may be directly associated with the TAG ID.

[0087] Note that "X" is not particularly limited and may be a predetermined time, resource (time, frequency, space), TRP, RIS, number of LOS paths, RS, spatial information including spatial relationship, etc. Furthermore, "may determine a TA value to be applied to an uplink signal for each X" may be interpreted as "may determine a TA value to be applied to an uplink signal for each group composed of X" (same below).

[0088] Additionally, the UE 200 may support at least one of the following options:

[0089] ·(Opt. A): Set the absolute values ​​of multiple TA values.

[0090] When a new TA value is added or an existing TA value is updated, the TA value is set using an absolute value. For example, the UE 200 may receive the absolute value (and the TA value index) of the newly added TA value from the gNB 100 via a MAC Control Element (CE).

[0091] Alternatively, when adding a new TA value or updating an existing TA value, the existing TA value may be referenced. For example, the UE 200 may receive a difference (and a TA value index) between the TA value to be newly added and the existing TA value via the MAC CE from the gNB 100.

[0092] (Opt. B): A standard TA value (default TA value) is determined, and other TA values ​​are determined by the difference from the standard TA value. With this option, TA values ​​can be determined using fewer bits because they are expressed as differences.

[0093] In this case, the reference TA value may be the TA value set by the initial connection (RA Response) or the TA value set by the MAC CE.

[0094] Furthermore, when a new TA value is added or an existing TA value is updated, a difference from a reference TA value may be set. For example, the UE 200 may receive the difference (and the TA value index) between the newly added TA value and the default TA value by the MAC CE from the gNB 100. Here, if it is not set which TA value to apply to the uplink signal to be transmitted, the UE 200 may transmit the uplink signal by applying the reference TA value.

[0095] Furthermore, when multiple different TA values ​​are set, the UE 200 may set / update the TA value according to the following options.

[0096] (Opt. 1): The UE 200 receives a TA command including multiple TA values ​​and sets / updates the TA values.

[0097] For example, UE 200 receives a TA command MAC CE including multiple or all TA values, and multiple TA values ​​are set / updated. This option allows multiple TA values ​​to be set / updated by one MAC CE, which improves resource utilization efficiency and reduces delays.

[0098] (Opt. 2): UE200 receives only a TA command containing one TA value and sets / updates the TA value. For example, UE200 receives a TA command MAC CE containing one TA value, and the TA value is set / updated. This option allows the MAC CE configuration to be limited to one.

[0099] In addition, the UE 200 may deactivate the set TA value. Specifically, the UE 200 can deactivate the TA value by the following options.

[0100] (Opt. 1): When the UE 200 receives a MAC CE that cancels the setting of a specific TA value, the UE 200 deactivates the set TA value. In this case, if a MAC CE that cancels all TA values ​​except the default TA value is specified and the UE 200 receives the MAC CE, the UE 200 may cancel all TA value settings except the default TA value.

[0101] (Opt. 2): When the TA value is updated / set during initial connection, the previously set TA value may be cleared. For example, in a contention-based random access procedure (CBRA), the previously set TA value may be cleared only when the TA value is updated (this example excludes a contention-free random access procedure (CFRA)).

[0102] (3.2.2) Example 2 In this operation example, UE 200 may set the TA value based on a reference signal (RS) referred to in uplink signal transmission. In other words, the TA value may be determined for each RS. Note that, although this operation example and subsequent operation examples may be premised on operations within the same cell (serving cell), the following operation examples including this operation example may not necessarily be limited to within the same cell.

[0103] The UE 200 may determine which TA value to apply for each RS referenced in uplink signal transmission or for each group formed by the referenced RSs, based on specifications by RRC, MAC CE, DCI, or the like.

[0104] Fig. 7 shows an example of a method for determining a TA value according to operation example 2. As shown in Fig. 7, UE 200 may determine the TA value by any of the following methods. However, the method is not necessarily limited to this, and the TA value may be determined by other methods.

[0105] (Opt. 2-1): The UE 200 refers to the RSs that are spatial relations, and applies the TA value set for each of the RSs or for each group consisting of the RSs to the uplink signal.

[0106] According to this option, in cases where the spatial relation info of PUCCH and the spatial relation info of SRS are set to the same RS, but the spatial relations are different but refer to the same RS, multiple TA values ​​can be set with little overhead by setting them for each RS.

[0107] For example, UE 200 may determine the TA value by referring to the RS that serves as the spatial relation when transmitting PUSCH / PUCCH / SRS. UE 200 may also determine the TA value when transmitting an uplink signal to which resources are allocated by referring to the PDCCH to which PUSCH / PUCCH / SRS resources are allocated and the RS that serves as the QCL.

[0108] Furthermore, the UE 200 may determine the TA value by referring to an RS that is a QCL (a relationship in which the same channel property is shared between different antenna ports) that is linked to the RS that is the spatial relation at the time of transmission by a TCI-state, etc. In this case, the UE 200 may determine the TA value by referring to an RS that is linked to a QCL of a specific type.

[0109] The type of QCL may be specified as follows (see Chapter 5.1.5 of 3GPP TS38.214):

[0110] ·QCL-Type A: {Doppler shift, Doppler spread, average delay, delay spread} ·QCL-Type B: {Doppler shift, Doppler spread} ·QCL-Type C: {Doppler shift, average delay} ·QCL-Type D: {Spatial Rx parameter} (Opt. 2-2): The UE 200 may apply, at the time of transmission, a TA value set for each RS or for each group formed by the RSs, based on the RSs referred to when calculating distance attenuation.

[0111] According to this option, since there is a high correlation between distance attenuation and delay time, multiple TA values ​​can be appropriately set. For example, UE 200 may determine the TA value by referring to the RS (e.g., CSI-RS, SSB) that is referenced when calculating distance attenuation for calculating the transmission power when transmitting PUCCH / PUSCH / SRS.

[0112] (Opt. 2-3): The UE 200 may apply, at the time of transmission, a TA value set for each RS or for each group formed by the RSs, based on the RSs referred to when calculating (setting) the precoder.

[0113] This option also supports PUSCH transmission without a spatial relation (non-codebook PUSCH). For example, the UE 200 may determine the TA value by referring to the RS that is used when calculating a precoding matrix for a non-codebook-based SRS during uplink signal transmission.

[0114] (3.2.3) Example 3 In this operation example, the UE 200 may set the TA value based on a spatial relation with the uplink signal. In other words, the TA value may be determined for each spatial relation.

[0115] UE200 may determine which TA value to apply for each QCL relation / TCI-state / spatial relation, or for each group consisting of multiple QCL relations / TCI-state / spatial relations, based on specifications by RRC, MAC CE, DCI, etc.

[0116] Fig. 8 shows an example of a method for determining a TA value according to operation example 3. As shown in Fig. 8, UE 200 may determine the TA value by any of the following methods. However, the method is not necessarily limited to these, and the TA value may be determined by other methods.

[0117] (Opt. 3-1): The UE 200 determines the TA value based on the TCI-state in which the QCL of the RS having the spatial relation with the uplink signal is set.

[0118] According to this option, when specific RSs have a QCL relationship, multiple TA values ​​can be appropriately set because the channel properties of the RSs are the same. In this case, the RS referred to in Operation Example 1 may be applied instead of the "RS that has a spatial relation with the uplink signal."

[0119] (Opt. 3-2): The UE 200 determines the TA value based on the spatial relation with the uplink signal.

[0120] According to this option, the spatial characteristics of the transmitted signal are determined according to the spatial relation, so that multiple TA values ​​can be appropriately set. For example, the UE 200 may determine the TA value by referring to the spatial relation of the uplink signal or the spatial relation of the RS that has a QCL type D relationship with the uplink signal.

[0121] (Opt. 3-3): The UE 200 determines the TA value based on the QCL of the RS that has a spatial relation with the uplink signal.

[0122] According to this option, when specific RSs have a QCL relationship, the channel properties of the RSs are the same, so multiple TA values ​​can be set appropriately. In this case, the RS referred to in Operation Example 1 may be applied instead of the "RS that has a spatial relation with the uplink signal."

[0123] (3.2.4) Example 4 In this operation example, the UE 200 may set the TA value based on downlink control information (DCI). Specifically, the UE 200 may determine the TA value to be applied to the uplink signal based on the setting of the received DCI.

[0124] Fig. 9 shows an example of a method for determining a TA value according to operation example 4. As shown in Fig. 9, UE 200 may determine the TA value by any of the following methods. However, the method is not necessarily limited to these, and the TA value may be determined by other methods.

[0125] (Opt. 4-1): A TA value is set for each CORESET pool index, and when transmitting an uplink signal, UE 200 may determine the TA value based on the pool index of the CORESET to which the DCI that scheduled the uplink signal was transmitted.

[0126] This option allows multiple TA values ​​to be set with little overhead. Note that the UE 200 may determine the TA value based on parameters specified by the DCI.

[0127] (Opt. 4-2): A TA value is set for each DMRS port, and UE 200 may apply the set TA value to the uplink signal when transmitting from the antenna port corresponding to the DMRS port specified by DCI.

[0128] This option allows the TA value to be set for each layer during MIMO transmission.

[0129] (Opt. 4-3): A TA value is set for each SRI (SRS resource indicator), and UE200 may apply the set TA value to the uplink signal when transmitting from the same antenna port as the SRS port of the SRS resource specified by the SRI of the DCI.

[0130] Furthermore, when multiple SRI fields can be configured and a TA value is configured for each SRI field, UE 200 may apply the TA value configured when transmitting from the same antenna port as the SRS port of the SRS resource specified by each SRI field to the uplink signal (this may be intended as Multi-TRP with single DCI). This makes it possible to handle PUSCH transmission that may not involve spatial relation, such as non-codebook type.

[0131] (Opt. 4-4): The UE 200 determines the TA value based on a dedicated bit field in the DCI that indicates the TA value to apply.

[0132] In this case, the UE 200 may determine the TA value for each antenna port from a dedicated bit field and apply a different TA value to each antenna port. This option provides a high degree of freedom and allows the TA value to be set for each MIMO layer.

[0133] (3.2.5) Example 5 In this operation example, the UE 200 may set the TA value depending on the transmission destination of the uplink signal or the transmission panel that transmits the uplink signal. Specifically, the UE 200 may determine the TA value to be applied to the uplink signal depending on the transmission destination (TRP) of the uplink signal or the transmission panel that transmits the uplink signal.

[0134] Fig. 10 shows an example of a method for determining a TA value according to operation example 5. As shown in Fig. 10, UE 200 may determine the TA value by any of the following methods. However, the method is not necessarily limited to these, and the TA value may be determined by other methods.

[0135] (Opt. 5-1): The UE 200 determines the TA value based on the transmission destination of the uplink signal.

[0136] This option makes it possible to appropriately set multiple TA values ​​based on the physical environment. For example, different TA values ​​may be applied depending on the beam BM that UE200 is directed to when transmitting. Furthermore, if UE200 can determine whether an uplink signal passes through RIS300, UE200 may apply different TA values ​​depending on whether the signal passes through RIS300. Furthermore, if UE200 can determine which TRP (panel) it is transmitting to, UE200 may apply different TA values ​​for each TRP (panel).

[0137] (Opt. 5-2): The UE 200 determines the TA value according to the transmission panel.

[0138] This option allows multiple TA values ​​to be appropriately set according to the position of the transmitting panel. For example, the UE 200 may apply a different TA value to each TRP (panel) that transmits an uplink signal.

[0139] (3.2.6) Example 6 In this operation example, the UE 200 may set a TA value for each time resource. For example, the UE 200 may set a TA value for each time resource to which an uplink signal is allocated.

[0140] 11 shows an example of the configuration of a path between UE 200 and a transmission / reception point (TRP) according to operation example 6. When the beams (Beams 1 and 2) of RIS 300 are switched periodically, UE 200 may change the TA value (i.e., set it to a different value) in accordance with the period.

[0141] This operation example has a high affinity with the RIS 300, whose beam changes semi-statically. For example, the UE 200 may set a TA value for each fixed time / period (e.g., SSB periodicity, TDD pattern, a predetermined number of radio frames / slots / symbols, etc.) and apply the set TA value within a section that includes a transmission occasion of the uplink signal.

[0142] In this case, when one transmission occasion overlaps with a plurality of periods in which different TA values ​​are set, the UE 200 may apply one of the following TA values.

[0143] (Opt. 1): TA value corresponding to the first (or last) period in the overlap (Opt. 2): TA value corresponding to the longest overlapping period (Opt. 3): Different TA values ​​for each period within a transmission occasion

[0144] (3.2.7) Example 7 In this operation example, the UE 200 may report the capability information (UE Capability Information) of the UE 200 regarding the setting of the TA value to the network.

[0145] Specifically, the UE 200 may report the following capability information:

[0146] -Can multiple TA values ​​be applied within a cell? -Whether or not each TA value determination method related to operation examples 2 to 6 can be executed, and whether or not options for each operation example are supported The maximum TA value that can be set by the UE200 Maximum TA value per CC / TAG / cell group that can be set by UE 200 The UE 200 may report the above-described capability information, including the supported frequencies (which may be frequency ranges (FR) or bands), by any of the following methods.

[0147] - Support for all frequencies at once (support for UE200) · Availability of each frequency · Availability of each FR (FR1 / FR2 or FR1 / FR2-1 / FR2-2) · Availability for each SCS Furthermore, the UE 200 may report the supported duplex mode in one of the following ways.

[0148] · Compatible with UE200 · Support for each duplex method (TDD / FDD)

[0149] (4) Actions and Effects According to the above-described embodiment, the following advantageous effects can be obtained. Specifically, the UE 200 can set different TA values ​​(timing values) for multiple uplink signals transmitted within the same cell (e.g., cell C1). Therefore, even when the RIS 300 or Multi-TRP is introduced and the number of LOS paths increases, an appropriate TA value can be set for an uplink signal such as a PUSCH transmitted via any of multiple paths.

[0150] In this embodiment, the UE 200 can set the TA value of the uplink signal based on a reference signal (RS) referred to in transmitting the uplink signal. Also, the UE 200 may set the TA value of the uplink signal based on a spatial relation with the uplink signal. Furthermore, the UE 200 In this embodiment, the UE 200 can set a different TA value for each destination of an uplink signal or for each transmission panel that transmits an uplink signal. The UE 200 can also set a different TA value for each time resource. Furthermore, the UE 200 may set the TA value of the uplink signal based on the content of downlink control information (DCI).

[0151] According to such UE 200, since appropriate TA values ​​can be individually set for a plurality of LOS paths, appropriate TA values ​​that fit within the CP can be set even when the number of LOS paths increases.

[0152] (5) Other embodiments Although the embodiments have been described above, it will be obvious to those skilled in the art that the present invention is not limited to the description of the embodiments and that various modifications and improvements are possible.

[0153] For example, in the above-described embodiment, the uplink signal is described as corresponding to a radio frame, a subframe, a slot, a symbol, etc., but as described above, it may also include various UL channels (e.g., PUSCH / PUCCH), and may be interpreted as a data unit transmitted via the UL channel, etc.

[0154] In addition, in the above-described embodiment, an example was described in which the TA value corresponds to the timing value that determines the transmission timing of the uplink signal, but as long as the start timing of the uplink signal and the downlink signal (radio frame) can be recognized from each other, it does not necessarily have to be limited to TA.

[0155] Also, in the above description, "configure," "activate," "update," "indicate," "enable," "specify," and "select" may be interchangeable. Similarly, "link," "associate," "correspond," and "map" may be interchangeable, and "allocate," "assign," "monitor," and "map" may also be interchangeable.

[0156] Furthermore, specific, dedicated, UE-specific, and UE-dedicated may be interchangeable. Similarly, common, shared, group-common, UE-common, and UE-shared may be interchangeable.

[0157] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0158] Furthermore, the block diagram (FIG. 4) used in the description of the above-described embodiment shows 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 a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or the multiple devices with software.

[0159] 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, allocating, 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 each is implemented.

[0160] Furthermore, the above-described gNB100 and UE200 (the device) may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 12 is a diagram showing an example of the hardware configuration of the device. As shown in Fig. 12, the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0161] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the apparatus 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.

[0162] Each functional block of the device (see FIG. 4) is realized by any hardware element of the computer device or a combination of the hardware elements.

[0163] In addition, each function of the device is realized by loading specified software (programs) onto hardware such as processor 1001 and memory 1002, causing processor 1001 to perform calculations, control communication via communication device 1004, and control at least one of reading and writing data in memory 1002 and storage 1003.

[0164] The processor 1001 controls the entire computer by running, for example, an operating system, and may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic unit, a register, and the like.

[0165] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 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-mentioned embodiments. Furthermore, the various processes described above may be executed by one processor 1001, or may 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.

[0166] The memory 1002 is a computer-readable recording medium and may be configured by, for example, 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 memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store a program (program code), a software module, etc., that can execute a method according to an embodiment of the present disclosure.

[0167] Storage 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a Compact Disc ROM (CD-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. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned recording medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0168] 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 called, for example, a network device, a network controller, a network card, or a communication module.

[0169] The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize, for example, at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0170] 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 outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0171] Furthermore, each device such as the processor 1001 and the memory 1002 is connected to 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.

[0172] Furthermore, the device 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, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0173] 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., 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.

[0174] Each aspect / embodiment described in the present disclosure may be applied to at least one of a system using Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, a 4th generation mobile communication system (4G), a 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable system, and a next-generation system extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G) may also be applied.

[0175] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure 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.

[0176] In the present disclosure, a specific operation described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, an MME or an S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0177] Information, signals (information, etc.) 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.

[0178] The input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. The input and output information may be overwritten, updated, or added to. The output information may be deleted. The input information may be sent to another device.

[0179] 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).

[0180] 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).

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0186] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0187] 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., 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.

[0188] In this disclosure, terms such as "base station (BS)," "radio 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.

[0189] A base station can accommodate one or more (e.g., three) cells (also called sectors). 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 services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0190] The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0191] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0192] 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 some other suitable terminology.

[0193] 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 object, or the mobile object itself. The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (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 Internet of Things (IoT) device such as a sensor.

[0194] Furthermore, a base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a mobile station is replaced with communication between multiple mobile stations (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the mobile station may be configured to have the functions of a base station. 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 uplink channel and downlink channel may be read as side channel.

[0195] Similarly, a mobile station in the present disclosure may be interpreted as a base station, in which case the base station may have the functions of a mobile station. 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.

[0196] Numerology may be a communication parameter applied 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 a transceiver in the frequency domain, and specific windowing operations performed by a transceiver in the time domain.

[0197] A slot may consist of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) A slot may be a numerology-based time unit.

[0198] A slot may include multiple minislots. Each minislot may consist of one or more 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.

[0199] 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.

[0200] 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 (e.g., 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.

[0201] 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 radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] The time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. Each TTI, subframe, etc. may be composed of one or more resource blocks.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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."

[0213] The above-described structures of the radio frame, subframe, slot, minislot, and symbol 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, and other configurations can be changed in various ways.

[0214] 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.

[0215] The reference signal may also be abbreviated as Reference Signal (RS), and may also be called a pilot depending on the applicable standard.

[0216] 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."

[0217] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0218] 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 therein or that the first element must precede the second element in some way.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] 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."

[0223] 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]

[0224] 10. Wireless communication systems 20 NG-RAN 100 gNB 101, 102 TRP 200 UE 210 Radio signal transmitter / receiver 220 Amplifier section 230 Modulation and Demodulation Unit 240 Control signal / reference signal processing section 250 Encoding / Decoding Unit 260 Data transmission and reception unit 270 Control Unit 300 RIS 1001 processor 1002 memory 1003 Storage 1004 Communication equipment 1005 Input Device 1006 Output Device 1007 Bus

Claims

1. A transmitter that transmits capability information for applying a plurality of timing values ​​set for each CORESET pool index of a plurality of control resource sets (CORESET) to one serving cell; a receiving unit that receives higher layer signaling that sets a plurality of the timing values ​​that are set for each of the CORESET pool indexes assigned to the one serving cell; a control unit that controls transmission timings of uplink signals toward a plurality of transmission / reception points (TRPs) that form the one serving cell using the timing value set by the higher layer signaling, The transmitter is a terminal that transmits the uplink signal via an uplink.

2. A terminal as described in claim 1, which transmits the uplink signal with a timing value based on the CORESET pool index of the CORESET from which the downlink control information (DCI) that scheduled the uplink signal was transmitted.

3. A step of transmitting capability information for applying a plurality of timing values ​​set for each CORESET pool index of a plurality of control resource sets (CORESET) pool indexes to one serving cell; receiving higher layer signaling for configuring a plurality of the timing values, each of which is configured for each of the CORESET pool indexes assigned to the one serving cell; using the timing value set by the higher layer signaling, controlling a transmission timing of an uplink signal directed to a transmission / reception point (TRP) forming the one serving cell, and transmitting the uplink signal via an uplink; A communication method for a terminal including:

4. A receiving unit that receives capability information of a terminal that applies a plurality of timing values ​​set for each CORESET pool index of a plurality of control resource sets (CORESET) pool indexes to one serving cell; a transmission unit configured to transmit, to the terminal, higher layer signaling for setting a plurality of the timing values ​​set for each of the CORESET pool indexes assigned to the one serving cell; The receiving unit controls the transmission timing of the uplink signal directed to a transmission / reception point (TRP) that forms the one serving cell using the timing value set by the higher layer signaling. A base station that receives the uplink signal from the terminal via an uplink.

5. A communication system including a radio base station and a terminal, The radio base station A receiver for receiving capability information of the terminal that applies a plurality of timing values ​​set for each CORESET pool index of a plurality of control resource sets (CORESET) pool indexes to one serving cell; a transmission unit configured to transmit, to the terminal, higher layer signaling for setting a plurality of the timing values ​​set for each of the CORESET pool indexes assigned to the one serving cell; The terminal a transmitter that transmits capability information of the terminal to the radio base station; a receiving unit for receiving the higher layer signaling; a control unit that controls a transmission timing of an uplink signal toward a transmission / reception point (TRP) that forms the one serving cell using the timing value set by the higher layer signaling; The transmitter transmits the uplink signal via an uplink.

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