Terminal, wireless communication system, and wireless communication method

Abstract

This terminal repeatedly transmits an uplink channel in a specific period greater than or equal to a plurality of slots and controls transmission of the uplink channel. If the specific period is not indicated, the terminal determines the length of the specific period on the basis of the number of transmissions of the uplink channel or the number of slots allocated therefor.

Description

Technical Field

[0001] The present invention relates to a terminal, a wireless communication system, and a wireless communication method that support coverage expansion.

Background Art

[0002] The 3rd Generation Partnership Project (3GPP) is standardizing the 5th generation mobile communication system (also called 5G, New Radio (NR), or Next Generation (NG)), and is also promoting the standardization of the next generation, called Beyond 5G, 5G Evolution, or 6G.

[0003] For example, in 3GPP Release-17, it has been agreed to study coverage enhancement (CE) in NR (Non-Patent Document 1).

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

[0005] As a time-division duplexing (TDD) slot configuration pattern, DDDSU (D: downlink (DL) symbol, S: DL / uplink (UL) or guard symbol, U: UL symbol) is defined. When the S slot is 10D + 2G + 2U, two consecutive symbols (2U) and one slot (14 symbols) in the time direction are used for UL, that is, a plurality of consecutive slots can be used for UL.

[0006] Therefore, in such a case, channel estimation (which may also be referred to as Joint channel estimation) of an uplink channel (UL channel) such as a Physical Uplink Shared Channel (PUSCH) using a demodulation reference signal (DMRS) that may exist in a plurality of slots is being considered.

[0007] In the case of Joint channel estimation of PUSCH, in order for a radio base station (gNB) to perform channel estimation across a plurality of slots, it is necessary to design a period (TDW: Time Domain Window) during which a signal is transmitted while maintaining the continuity of power and phase.

[0008] Therefore, the following disclosure is made in view of such a situation, and an object is to provide a terminal, a wireless communication system, and a wireless communication method that can more efficiently perform channel estimation of an uplink channel such as PUSCH using a DMRS that may exist in a plurality of slots.

[0009] One aspect of the present disclosure includes a transmission unit (radio signal transceiver unit 210) that repeatedly transmits an uplink channel during a specific period of a plurality of slots or more, and a control unit (control unit 270) that controls the transmission of the uplink channel. When the specific period is not indicated, the control unit is a terminal (UE200) that determines the length of the specific period based on the number of transmission times or the number of allocated slots of the uplink channel.

[0010] One aspect of the present disclosure includes a transmission unit that repeatedly transmits an uplink channel during a specific period of a plurality of slots or more, and a control unit that controls the transmission of the uplink channel. The control unit is a terminal that determines a resource block used during hopping in the frequency direction of the uplink channel based on the length of the specific period.

[0011] One aspect of the present disclosure is a terminal including a transmitting unit that repeatedly transmits an uplink channel during a specific period of a plurality of slots or more, and a control unit that controls the transmission of the uplink channel. The control unit determines at least one of a start position or an end position of the specific period based on a resource block used during hopping in a frequency direction of the uplink channel.

[0012] One aspect of the present disclosure is a terminal including a transmitting unit that repeatedly transmits an uplink channel during a specific period of a plurality of slots or more, and a control unit that controls the transmission of the uplink channel. The control unit starts the specific period from a first transmission opportunity of the uplink channel or a timing of a first transmission of the uplink channel.

[0013] One aspect of the present disclosure is a wireless communication system including a terminal and a radio base station. The terminal includes a transmitting unit that repeatedly transmits an uplink channel during a specific period of a plurality of slots or more, and a control unit that controls the transmission of the uplink channel. When the specific period is not indicated, the control unit determines a length of the specific period based on a number of transmissions of the uplink channel or an allocated number of slots. The radio base station includes a receiving unit that receives the uplink channel.

[0014] One aspect of the present disclosure is a wireless communication method including a step in which a terminal repeatedly transmits an uplink channel during a specific period of a plurality of slots or more, and a step in which, when the specific period is not indicated, the terminal determines a length of the specific period based on a number of transmissions of the uplink channel or an allocated number of slots.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are assigned to the same functions and configurations, and the description thereof will be omitted as appropriate.

[0017] (1) Overall schematic configuration of the wireless communication system FIG. 1 is an overall schematic configuration diagram of a wireless communication system 10 according to this embodiment. The wireless communication system 10 is a wireless communication system compliant with 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).

[0018] Note that the wireless communication system 10 may also be a wireless communication system compliant with a system called Beyond 5G, 5G Evolution, or 6G.

[0019] NG-RAN 20 includes a radio base station 100 (hereinafter, gNB 100). Note that the specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG. 1.

[0020] NG-RAN 20 actually includes a plurality of NG-RAN Nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that NG-RAN 20 and 5GC may simply be expressed as "network".

[0021] gNB 100 is a radio base station compliant with NR and performs wireless communication with UE 200 according to NR. gNB 100 and UE 200 can support Massive MIMO that generates a more directional beam by controlling wireless signals transmitted from a plurality of antenna elements, carrier aggregation (CA) that bundles and uses a plurality of component carriers (CCs), and dual connectivity (DC) that enables simultaneous communication between the UE and each of a plurality of NG-RAN Nodes.

[0022] The wireless communication system 10 supports FR1 and FR2. The frequency bands of each FR (Frequency Range) are as follows.

[0023] · FR1: 410 MHz to 7.125 GHz ·FR2: 24.25 GHz to 52.6 GHz In FR1, a Sub - Carrier Spacing (SCS) of 15, 30, or 60 kHz is used, and a bandwidth (BW) of 5 to 100 MHz may be used. FR2 is at a higher frequency than FR1, and an SCS of 60 or 120 kHz (240 kHz may be included) is used, and a bandwidth (BW) of 50 to 400 MHz may be used.

[0024] 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 and up to 114.25 GHz.

[0025] Also, 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).

[0026] Figure 2 shows a configuration example of a radio frame, sub - frame, and slot used in the wireless communication system 10.

[0027] As shown in Figure 2, 1 slot is composed of 14 symbols. The larger (wider) the SCS, the shorter the symbol period (and slot period). Note that the number of symbols constituting 1 slot does not necessarily have to be 14 symbols (for example, 28, 56 symbols). Also, the number of slots per sub - frame may vary depending on the SCS. Furthermore, the SCS may be wider than 240 kHz (for example, as shown in Figure 2, 480 kHz, 960 kHz).

[0028] Note that the time direction (t) shown in FIG. 2 may also be referred to as a time domain, a time domain, a symbol period, or a symbol time. Further, the frequency direction may also be referred to as a frequency domain, a frequency domain, a resource block, a resource block group, a subcarrier, a BWP (Band width part), a subchannel, a common frequency resource, etc.

[0029] The wireless communication system 10 can support coverage enhancement (CE) that expands the coverage of the cell (or a physical channel) formed by the gNB 100. In coverage enhancement, a mechanism for increasing the reception success rate of various physical channels may be provided.

[0030] For example, the gNB 100 can support repeated transmission of the PDSCH (Physical Downlink Shared Channel), and the UE 200 can support repeated transmission of the PUSCH (Physical Uplink Shared Channel).

[0031] In the wireless communication system 10, a time-division duplexing (TDD) slot configuration pattern may be set. For example, DDDSU (D: downlink (DL) symbol, S: DL / uplink (UL) or guard symbol, U: UL symbol) may be defined (see 3GPP TS38.101-4).

[0032] "D" indicates a slot including all DL symbols, and "S" indicates a slot in which DL, UL, and guard symbols (G) are mixed. "U" indicates a slot including all UL symbols.

[0033] In the wireless communication system 10, channel estimation of PUSCH (or PUCCH (Physical Uplink Control Channel)) can be performed using a demodulation reference signal (DMRS) for each slot. Furthermore, channel estimation of PUSCH (or PUCCH) can be performed using DMRSs respectively assigned to a plurality of slots. Such channel estimation may be referred to as Joint channel estimation. Alternatively, it may be referred to by another name, such as cross-slot channel estimation.

[0034] The UE 200 can transmit DMRSs assigned to (spanning) a plurality of slots so that the gNB 100 can perform Joint channel estimation using the DMRSs.

[0035] In the wireless communication system 10, for coverage extension, TB processing over multi-slot PUSCH (TBoMS) that processes a transport block (TB) via PUSCHs assigned to a plurality of slots may be applied.

[0036] In TBoMS, the number of symbols assigned may be the same in each slot, such as the Time Domain Resource Allocation (TDRA) of Repetition type A of PUSCH (described in detail later), or may be different in each slot, such as the TDRA of Repetition type B of PUSCH (described in detail later).

[0037] The TDRA may be interpreted as resource allocation in the time domain of PUSCH defined in 3GPP TS38.214. The TDRA of PUSCH may also be interpreted as being defined by an information element (IE) of the radio resource control layer (RRC), specifically, PDSCH-Config or PDSCH-ConfigCommon.

[0038] Alternatively, the TDRA may be interpreted as resource allocation in the time domain of the PUSCH specified by downlink control information (DCI).

[0039] (2) Functional Block Configuration of the Wireless Communication System Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block configuration of the UE 200 will be described. FIG. 3 is a functional block configuration diagram of the gNB 100 and the UE 200.

[0040] As shown in FIG. 3, the UE 200 includes a radio signal transceiver 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 transceiver unit 260, and a control unit 270.

[0041] Note that in FIG. 3, only the main functional blocks related to the description of the embodiment are shown, and it should be noted that the UE 200 (gNB 100) has other functional blocks (for example, a power supply unit, etc.). Also, FIG. 3 shows the functional block configuration of the UE 200. For the hardware configuration, refer to FIG. 11.

[0042] The radio signal transceiver unit 210 transmits and receives radio signals according to NR. The radio signal transceiver unit 210 can support Massive MIMO that generates a more directional beam by controlling radio (RF) signals transmitted from a plurality of antenna elements, carrier aggregation (CA) that bundles and uses a plurality of component carriers (CC), and dual connectivity (DC) that enables simultaneous communication between the UE and two NG-RAN Nodes respectively.

[0043] Also, the radio signal transceiver unit 210 may transmit a physical uplink shared channel. In this embodiment, the radio signal transceiver unit 210 may constitute a transmitter unit.

[0044] Specifically, the wireless signal transceiver 210 may transmit the PUSCH towards the network (gNB100). The wireless signal transceiver 210 may support the repeated transmission (Repetition) of the PUSCH.

[0045] Multiple types of repeated transmission of the PUSCH may be defined. Specifically, Repetition type A and Repetition type B may be defined. Repetition type A may be interpreted as a form in which the PUSCH allocated within a slot is repeatedly transmitted. That is, the PUSCH is 14 symbols or less, and there is no possibility of being allocated across multiple slots (adjacent slots).

[0046] On the other hand, Repetition type B may be interpreted as the repeated transmission of the PUSCH for which a PUSCH of 15 symbols or more may be allocated. In the present embodiment, it may be allowed to allocate such a PUSCH across multiple slots.

[0047] Also, the wireless signal transceiver 210 may repeatedly transmit the uplink channel (UL channel) during a specific period of multiple slots or more. The uplink channel may include a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH).

[0048] The shared channel may also be called a data channel.

[0049] The specific period of multiple slots or more may be interpreted as a period related to the repetition of the PUSCH (or PUCCH). For example, the specific period may be indicated by the number of repetitions, or may be the time during which a specified number of repetitions are executed. Also, the specific period may be called a Time Domain Window (TDW). The TDW may be interpreted as a period during which the gNB100 transmits a signal while maintaining the continuity of power and phase in order to perform channel estimation across multiple slots.

[0050] Alternatively, the wireless signal transceiver unit 210 may repeatedly transmit the UL channel a specific number of times. Specifically, the wireless signal transceiver unit 210 may repeatedly transmit the PUSCH (or PUCCH) a plurality of times.

[0051] The specific period and / or the specific number of times may be indicated by signaling from the network (which may be a higher layer of RRC or a lower layer such as DCI, the same applies hereinafter), or may be preset in the UE 200.

[0052] The amplifier unit 220 is composed of a PA (Power Amplifier) / LNA (Low Noise Amplifier), etc. The amplifier unit 220 amplifies the signal output from the demodulation and modulation unit 230 to a predetermined power level. Also, the amplifier unit 220 amplifies the RF signal output from the wireless signal transceiver unit 210.

[0053] The demodulation and modulation unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (such as gNB 100). In the demodulation and modulation unit 230, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM) may be applied. Also, DFT-S-OFDM may be used not only for the uplink (UL) but also for the downlink (DL).

[0054] The control signal / reference signal processing unit 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.

[0055] Specifically, the control signal / reference signal processing unit 240 receives various control signals transmitted from the gNB 100 via a predetermined control channel, for example, control signals of the Radio Resource Control (RRC) layer. Also, the control signal / reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel.

[0056] The control signal / reference signal processing unit 240 performs processing using reference signals (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).

[0057] DMRS is a reference signal (pilot signal) known between the base station and the terminal for each terminal to estimate the fading channel used for data demodulation. PTRS is a reference signal for each terminal for the purpose of estimating phase noise, which is a problem in high frequency bands.

[0058] Note that the reference signals may include, in addition to DMRS and PTRS, Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for location information.

[0059] Also, the channels include a control channel and a data channel. The control channel may include Physical Downlink Control Channel (PDCCH), Physical Uplink Control Channel (PUCCH), Random Access Channel (RACH, including Downlink Control Information (DCI) with Random Access Radio Network Temporary Identifier (RA-RNTI)), and Physical Broadcast Channel (PBCH).

[0060] In addition, the data channels include a Physical Downlink Shared Channel (PDSCH), a Physical Uplink Shared Channel (PUSCH), etc. The data may mean the data transmitted via the data channel.

[0061] In addition, the control signal / reference signal processing unit 240 may transmit the UE200's capability information regarding the allocation of the Physical Uplink Shared Channel (PUSCH) to the network. In this embodiment, the control signal / reference signal processing unit 240 may constitute a transmission unit that transmits the capability information.

[0062] Specifically, the control signal / reference signal processing unit 240 can transmit UE Capability Information regarding the allocation of the PUSCH (which may include Repetition) to the gNB100. Details of the UE Capability Information will be described later.

[0063] The encoding / decoding unit 250 performs data segmentation / concatenation and channel coding / decoding, etc. for each predetermined communication destination (gNB100 or another gNB).

[0064] Specifically, the encoding / decoding unit 250 divides the data output from the data transmission / reception unit 260 into a predetermined size and performs channel coding on the divided data. Also, the encoding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230 and concatenates the decoded data.

[0065] The data transmission / reception unit 260 performs transmission and reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmission / reception unit 260 performs assembly / disassembly of PDU / SDU in a plurality of layers (such as Medium Access Control layer (MAC), Radio Link Control layer (RLC), and Packet Data Convergence Protocol layer (PDCP)). Also, the data transmission / reception unit 260 performs error correction and retransmission control of data based on Hybrid automatic repeat request (Hybrid ARQ).

[0066] The control unit 270 controls each functional block constituting the UE 200. In particular, in this embodiment, the control unit 270 controls the transmission of UL channels, specifically, PUSCH and PUCCH.

[0067] Specifically, the control unit 270 can hop the UL channel in the frequency direction in units of a specific period of a plurality of slots or more. Hopping of the UL channel in the frequency direction may be referred to as frequency hopping, and frequency hopping in units of a specific period of a plurality of slots or more may be referred to as inter-slot frequency hopping. Note that hopping may mean that the frequency resources to be used change. Specifically, it may mean that subcarriers, resource blocks, resource block groups, or BWPs change.

[0068] Also, the control unit 270 may hop the UL channel in the frequency direction in units of a specific number indicating the number of repeated transmissions of the UL channel. Specifically, the control unit 270 may perform frequency hopping every predetermined number of Repetitions, in other words, in units of the number of repeated transmissions (Repetition number) of the specified UL channel.

[0069] When joint channel estimation in gNB 100 is applied, if the transmissions of UL channels (PUSCH and PUCCH) overlap (which may also be expressed as a collision), when allocating resources for the UL channel (which may also be repetition of the UL channel), specifically, at the timing of DCI reception, a frequency hopping pattern (hopping pattern) using allocatable resources that avoid overlap may be determined.

[0070] Alternatively, when the transmissions of UL channels (PUSCH and PUCCH) overlap, at the first repetition of the UL channel, specifically, at the transmission timing of the first repetition, a hopping pattern using allocatable resources that avoid overlap may be determined.

[0071] Also, the control unit 270 may set a hopping pattern regarding the repetition of the UL channel as described above based on signaling from the network.

[0072] The control unit 270 may determine the allocation of DMRS transmitted on the UL channel, specifically, on the PUSCH, based on the repetition state of the PUSCH, that is, the number of repetitions, the repetition period, etc.

[0073] Specifically, the control unit 270 may transmit the same symbol (OFDM symbol) for DMRS every predetermined number of repetitions. Also, the control unit 270 may set the symbols (OFDM symbols) for DMRS to be used respectively every predetermined number of repetitions.

[0074] Further, when a specific period of more than a plurality of slots (hereinafter referred to as TDW) described above is not indicated, the control unit 270 may determine the length of the TDW based on the number of transmissions or the number of allocated slots of the UL channel. The length (time length) of the TDW may be defined by the number of slots, the number of symbols, etc., or may be defined by a specific time. The UL channel may mean the PUSCH, but the PUCCH may also be included.

[0075] The control unit 270 may determine a resource block (RB) used at the time of hopping in the frequency direction of the UL channel (PUSCH and / or PUCCH, the same hereinafter) based on the length of the TDW. Note that the RB may be a resource block group (RBG), a subcarrier, a BWP, or the like.

[0076] Alternatively, the control unit 270 may determine at least one of the start or end positions of the TDW based on the resource block used at the time of hopping in the frequency direction of the UL channel. The start / end position of the TDW may be indicated by a slot, but if it is in the time direction, it may be indicated according to other criteria such as a symbol.

[0077] Further, the control unit 270 may start the TDW from the first transmission occasion of the UL channel or the timing of the initial transmission of the UL channel. Note that the TDW may be a Configured TDW or an Actual TDW (details will be described later).

[0078] Also, the functions related to the transmission / reception and control of the DMRS described above may also be provided in the gNB 100. For example, the gNB 100 (radio signal transmission / reception unit 210) may constitute a reception unit that receives a UL channel repeatedly transmitted from the UE 200 within a specific period. The radio signal transmission / reception unit 210 of the gNB 100 may receive a UL channel hopped in the frequency direction in units of the specific period.

[0079] In addition, gNB100 (radio signal transceiver unit 210) may receive a UL channel (e.g., PUSCH) that is repeatedly transmitted a specific number of times from UE200, that is, Repetition is executed. In this case, gNB100 (radio signal transceiver unit 210) may receive the UL channel that has hopped in the frequency direction in units of the specific number of times.

[0080] gNB100 (control unit 270) may constitute a control unit that performs joint channel estimation of a UL channel (e.g., PUSCH) assigned to a plurality of slots using DMRS assigned to the plurality of slots.

[0081] gNB100 (control unit 270) may perform joint channel estimation of the UL channel (e.g., PUSCH) assigned to the plurality of slots using DMRS assigned to the plurality of slots.

[0082] In addition, gNB100 (control unit 270) may perform (joint channel estimation) of the UL channel in the initial access of UE200, specifically, in the random access procedure, using DMRS assigned to a plurality of slots.

[0083] (3) Operation of the radio communication system Next, the operation of the radio communication system 10 will be described. Specifically, the operation related to channel estimation of the uplink channel for the purpose of coverage performance will be described.

[0084] (3.1) Premise As described above, joint channel estimation may be interpreted as a technique for performing channel estimation based on DMRS (assigned) existing in a plurality of slots.

[0085] Also, the TDW (Time Domain Window) may be interpreted as the interval during which the UE transmits signals while maintaining the continuity of power and phase in order to enable Joint channel estimation by the radio base station (gNB).

[0086] Specifically, in the TDW, in order to maintain the continuity of the phase of the transmitted signal (channel), the following conditions may be satisfied.

[0087] · The modulation order is the same.

[0088] · The frequency band to which resources are allocated is the same.

[0089] · The same beam is applied during transmission.

[0090] · The signal is transmitted by applying the same value of Timing Advance (TA).

[0091] Thereby, the gNB can apply Joint channel estimation within the TDW.

[0092] Figure 4 shows an example of the TDW setting. Specifically, Figure 4 shows an example in which PUSCH is repeatedly transmitted in 4 slots and the TDW spans 2 slots.

[0093] Configured TDW and Actual TDW may be defined for the TDW. Specifically, they may be defined as follows.

[0094] · Configured TDW · Start position: The start position of the first Configured TDW is the first PUSCH transmission. The start positions of other Configured TDWs follow that of the first Configured TDW. Also, the start positions of other Configured TDWs may be determined before the first PUSCH transmission.

[0095] ·End position: It shall be the position where the set length Window length (L) has elapsed from the start point. If an event occurs, Configured TDW may be terminated.

[0096] ·Actual TDW ·It is the section where the UE actually transmits while maintaining the continuity of power and phase.

[0097] ·A plurality of Actual TDWs may be included within one Configured TDW.

[0098] ·If an event occurs, Actual TDW is terminated, and whether Actual TDW restarts within the same Configured TDW is determined according to the UE capability.

[0099] The events may include semi-static events (Event A) and dynamic events (Event B). The semi-static events may be interpreted as events that affect the determination of Configured TDW, and the dynamic events may be interpreted as events that affect the determination of Actual TDW.

[0100] Figure 5 shows an example of the configuration of Configured TDW and Actual TDW. As shown in Figure 5, a plurality of Actual TDWs may be included within one Configured TDW. Also, as shown in Figure 5, when colliding with one High priority (HP) PUSCH of the events, Actual TDW may be terminated.

[0101] Figure 6 shows an example of the length (Window length) of Configured TDW. Specifically, Figure 6 shows examples where the Window length of Configured TDW is 7 (slots) and the Window length of Configured TDW is 8 (slots).

[0102] Here, considering the case where the Window length is not explicitly specified (not explicitly indicated) and Joint channel estimation is applied, a default value for the Window length may be provided.

[0103] Also, when the value of the Window length is determined based on a single-valued RRC parameter, depending on the TDRA of the allocated PUSCH, the lengths may be different between Configured TDWs.

[0104] Here, when the TDW is long, power / frequency calibration / TA update may be delayed. When the gain of Joint channel estimation is the same, it is desirable to make the TDW length as short as possible. For this reason, when there are multiple Configured TDWs, it is desirable that the lengths of the Configured TDWs be equal so as not to create a section where the update is delayed.

[0105] That is, in Joint channel estimation of UL channels such as PUSCH, in order for the gNB to perform channel estimation across multiple slots, it is necessary to design the period (TDW) during which signals are transmitted while maintaining the continuity of power and phase.

[0106] Therefore, it is considered necessary to examine the following matters.

[0107] · Method for determining the default length of Configured TDW · Enhanced frequency hopping pattern determination method and method for determining Configured TDW when applying the determination method · Start position of Configured TDW for CG-PUSCH

[0108] (3.2) Operation example Below, an operation example based on the above-mentioned examination matters will be described.

[0109] (3.2.1) Operation Example 1 In this operation example, the method for determining the default TDW length (window length) will be described. If the window length is not explicitly specified by the network, the UE 200 may determine the window length as follows.

[0110] · (Opt 1): Determine based on UE capability For example, the maximum value of the TDW reported by the UE 200 (which may also be referred to as the maximum duration) may be determined as the window length.

[0111] · (Opt 2): Determine based on the number of repetitions of PUSCH transmission or the number of slots to which resources are allocated For example, the number of slots to which PUSCH resources are allocated may be determined as the window length. In this case, instead of the number of slots to which resources are allocated, it may be the "number of symbols to which resources are allocated" or the "number of symbols between the first transmission occasion and the last transmission occasion".

[0112] (Opt 1) and (Opt 2) can improve the gain of joint channel estimation with a long TDW.

[0113] · (Opt 3): Determine based on UE capability and the number of repetitions of PUSCH transmission or the number of slots to which resources are allocated For example, if the number of slots to which resources are allocated ≤ maximum duration, the maximum duration may be determined as the window length.

[0114] Also, when the number of slots with resources allocated > maximum duration, the window length may be determined as window length = ceiling((the number of slots with resources allocated) / (variable X)). In this case, variable X may be a value determined by a predetermined rule, or may be determined as X = ceiling((the number of slots with resources allocated) / (maximum duration)). In this case, instead of the number of slots with resources allocated, it may be the "number of symbols with resources allocated" or the "number of symbols between the first transmission occasion and the last transmission occasion".

[0115] (Opt 3) can determine the window length so that the difference in length between Configured TDWs is reduced.

[0116] Figure 7 shows an example of determining the TDW length (window length) according to Operation Example 1. Specifically, in Figure 7, in (Opt 3), an example where maximum duration = 7 slots is shown. Here, when PUSCH is repeatedly transmitted 8 times, X = ceiling(8 / 7) = 2, and window length = ceiling(8 / 2) = 4 may be determined.

[0117] Note that Operation Example 1 may also be applied not only to PUSCH but also to PUCCH transmission.

[0118] (3.2.2) Operation Example 2 In this operation example, the operations related to enhanced frequency hopping will be described.

[0119] (3.2.2.1) Operation Example 2-1 UE200 may determine the resource blocks (RBs) to be used for transmission when applying frequency hopping (FH) based on the Configured TDW.

[0120] For example, the UE 200 may determine the value of the starting RB for each slot / repetition when FH is applied based on the Configured TDW.

[0121] Specifically, when the frequency is hopped in the slot / repetition where the Configured TDW starts, the frequency may be changed based on the following formula.

[0122]

Number

[0123] FIG. 8 shows an example of frequency hopping according to Operation Example 2-1. Specifically, FIG. 8 shows an example where the window length = 2 and the order of Configured TDW ≧ Frequency hopping pattern determination.

[0124] In the example of FIG. 8, since frequency hopping is performed for each Configured TDW, a high gain of joint channel estimation can be expected.

[0125] (3.2.2.2) Operation Example 2-2 The UE 200 may determine the start / end position of each Configured TDW based on the allocated RB when FH is applied.

[0126] For example, the UE 200 may determine the start position of each Configured TDW based on each slot / repetition where the frequency is hopped when FH is applied. Specifically, the UE 200 may determine the start / end position of each Configured TDW as follows.

[0127] · (Opt 1): Start the Configured TDW from the slot where the frequency is hopped For example, when frequency hopping is performed at an odd or even slot number, Configured TDW may be started in accordance with the timing.

[0128] FIG. 9 shows an example of frequency hopping according to Operation Example 2-2. Specifically, FIG. 9 shows an example in which frequency hopping is performed at odd slot numbers with duration per hop = 2.

[0129] In the example of FIG. 9, since the order of determination is Frequency hopping pattern ≧ Configured TDW, when duration per hop is the same, regardless of the PUSCH transmission start position, frequency hopping occurs at the same timing, making multiplexing between UEs easy.

[0130] ·(Opt 2): Start Configured TDW in the repetition where frequency hopping occurs For example, the frequency may be changed based on the following formula.

[0131]

Equation

[0132] Note that nX1 indicates the slot number in (Opt 1) and the index of repetition or nominal repetition in (Opt 2). nX3 indicates the duration per hop.

[0133] Note that Operation Examples 2-1 and 2-2 may be applied not only to PUSCH but also to PUCCH transmission. Also, instead of Configured TDW, Actual TDW may be applied.

[0134] (3.2.3) Operation Example 3 In this operation example, the operation regarding the PUSCH transmission timing of UE200 during the repeated transmission of Configured Grant (CG)-PUSCH will be described.

[0135] Here, regarding the Initial transmission timing of UE200, it is assumed that the RV (Redundancy Version) sequence {0,0,0,0} or {0,3,0,3} is selected, and when startingFromRV0 is on, PUSCH initial transmission is possible in the transmission occasion corresponding to RV = 0 (see Section 6.1.2.3.1 of 3GPP TS38.214).

[0136] Also, UE200 may set the transmission end timing of CG-PUSCH as any of the following.

[0137] · Completion of the specified number of repeated transmissions set for UE200 · Completion of transmission at the last transmission occasion within Period P · Duplication of transmission with the PUSCH of the same HARQ process scheduled by DCI format 0_0, 0_1, 0_2 · Receiving a DCI with the DFI (Downlink Feedback Information) flag in DCI format 0_1 and detecting an ACK in the corresponding HARQ process UE200 may determine the start position of the Configured TDW of CG-PUSCH as follows.

[0138] · (Opt 1): Start the Configured TDW from the first transmission occasion (within the Period (see Figure 10)) In this case, the Configured TDW may be started from the start position of the slot where the first transmission occasion exists, or may be started from the first symbol of the transmission occasion.

[0139] Also, in this case, the start position may be determined for any of the slot / symbol / transmission occasion determined to be transmittable based on parameters such as the TDD pattern (tdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationDedicated) and the SSB position (ssb-PositionsInBurst).

[0140] ·(Opt 2): Start Configured TDW from Initial transmission In this case, the Configured TDW may be started from the initial transmission where the UE200 actually transmits the PUSCH. Also, the UE200 may start the Configured TDW from the slot start position of the initial transmission, or may start the Configured TDW from the first symbol of the initial transmission.

[0141] FIG. 10 shows an example of determining the start position of the Configured TDW according to Operation Example 3. Specifically, FIG. 10 shows an example (Opt 1, Opt 2) in which the PUSCH is repeatedly transmitted within the period P with the window length = 4.

[0142] UE 200 can start an initial transmission from the slot (RV 0) shaded with diagonal lines. As described above, in the case of (Opt 1), the Configured TDW may be started from the first transmission occasion, and in the case of (Opt 2), the Configured TDW may be started from the Initial transmission.

[0143] Also, in the case of (Opt 2), UE 200 may notify gNB 100 of information indicating which transmission occasion is the initial transmission by any of the following methods.

[0144] ·(Opt A): Multiplex Uplink Control Information (UCI) on the PUSCH and notify whether it is an initial transmission by the UCI In this case, UE 200 may notify whether joint channel estimation with the previous slot is possible (whether the TDW condition is satisfied) by the UCI, and based on the notification, may also notify gNB 100 of information indicating which transmission occasion corresponds to the initial transmission.

[0145] ·(Opt B): Notify whether it is an initial transmission based on the DMRS port and / or DMRS resource of the PUSCH to be transmitted In this case, UE 200 may notify whether joint channel estimation with the previous slot is possible (whether the TDW condition is satisfied) by the DMRS port and / or DMRS resource, and based on the notification, may also implicitly notify gNB 100 of information indicating which transmission occasion corresponds to the initial transmission.

[0146] Also, the UE 200 may determine whether to apply (Opt 1) or (Opt 2) based on the parameters set by the RRC.

[0147] (3.2.4) Operation Example 4 In this operation example, the operations related to the notification of UE capability will be described. The UE 200 may report the following content to the network as UE Capability Information regarding the TDW.

[0148] · Applicability of each operation example · Applicability of the option (Opt) of each operation example The UE 200 may report regarding the supported frequency (either FR or band) by any of the following methods.

[0149] · Supportability for all frequencies at once (supportability as a UE) · Supportability for each frequency · Supportability for each of FR1 / FR2 · Supportability for each SCS Also, the UE 200 may report regarding the supported multiplexing scheme by any of the following methods.

[0150] · Supportability as a UE · Supportability for each multiplexing scheme (TDD / FDD)

[0151] (4) Function and Effect According to the above-described embodiments, the following functions and effects can be obtained. According to the gNB 100 and the UE 200 according to the above-described operation examples 1 to 4, even when Joint channel estimation of the UL channel is applied, an appropriate TDW can be set. Therefore, the gNB 100 can accurately execute Joint channel estimation in the TDW for transmitting a signal while maintaining the continuity of power and phase.

[0152] That is, according to the gNB 100 and the UE 200, channel estimation of an UL channel such as a PUSCH using DMRS that may exist in a plurality of slots can be executed more efficiently.

[0153] (5) Other embodiments As described above, the content of the present invention has been described along with the examples. However, it is obvious to those skilled in the art that the present invention is not limited to these descriptions, and various modifications and improvements are possible.

[0154] For example, in the above-described embodiment, the demodulation reference signal (DMRS) used for channel estimation of the PUSCH (or PUCCH) has been described. However, any other reference signal may be used as long as it is a reference signal used for channel estimation of a physical channel such as the PUSCH (or PUCCH).

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

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

[0157] In addition, the block configuration diagram (FIG. 3) used in the description of the above-described embodiments shows blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the realization method of each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly connected (for example, using wired, wireless, etc.), and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0158] Functions include, but are not limited to, judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, regarded as, notification (broadcasting), notification (notifying), communication (communicating), forwarding, configuration (configuring), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment (assigning), etc. For example, a functional block (component) that functions as transmission is called a transmitting unit or a transmitter. As described above, the realization method is not particularly limited.

[0159] Furthermore, the above-described gNB 100 and UE 200 (the device) may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 11 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 11, 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, and the like.

[0160] In the following description, the term "device" can be read as a circuit, device, unit, etc. The hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without including some devices.

[0161] Each functional block of the device (see Figure 3) is realized by any hardware element of the computer device or a combination of the hardware elements.

[0162] Also, each function in the device is realized by loading a predetermined software (program) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication by the communication device 1004, or control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0163] The processor 1001 controls the entire computer by operating, for example, an operating system. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, etc.

[0164] Also, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program for causing the computer to execute at least a part of the operations described in the above embodiments is used. Furthermore, the above various processes 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 mounted by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

[0165] The memory 1002 is a computer-readable recording medium and may be constituted by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 can store a program (program code), software module, etc. capable of executing the method according to an embodiment of the present disclosure.

[0166] The storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, optical discs such as Compact Disc ROM (CD-ROM), hard disk drives, flexible disks, magneto-optical disks (e.g., compact discs, digital versatile discs, Blu-ray (registered trademark) discs), smart cards, flash memories (e.g., cards, sticks, key drives), floppy (registered trademark) disks, magnetic strips, etc. The storage 1003 may also be referred to as an auxiliary storage device. The above-described recording medium may be, for example, a database, server, or other appropriate medium including at least one of the memory 1002 and the storage 1003.

[0167] The communication device 1004 is hardware (a transmission / reception device) for performing communication 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, network controller, network card, communication module, etc.

[0168] The communication device 1004 may be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0169] The input device 1005 is an input device that receives external input (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED lamp, etc.). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

[0170] Also, each device such as the processor 1001 and the memory 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 for each device.

[0171] 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), a Field Programmable Gate Array (FPGA), etc., 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 hardware.

[0172] Also, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and other methods may be used. For example, the notification of information may be implemented by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or combinations thereof. Also, 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, etc.

[0173] 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, 4th generation mobile communication system (4G), 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), other suitable systems, and next-generation systems extended based thereon. Also, a plurality of systems may be combined (e.g., a combination of at least one of LTE and LTE-A and 5G) and applied.

[0174] The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be reordered as long as there is no contradiction. For example, regarding the methods described in the present disclosure, the elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0175] Specific operations assumed to be performed by a base station in the present disclosure may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with a terminal can clearly be performed by at least one of the base station and other network nodes other than the base station (for example, but not limited to, MME or S-GW, etc.). Although the case where there is one other network node other than the base station is exemplified above, a combination of a plurality of other network nodes (for example, MME and S-GW) may also be possible.

[0176] Information, signals (such as information) can be output from an upper layer (or lower layer) to a lower layer (or upper layer). They may also be input and output via a plurality of network nodes.

[0177] 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 can be overwritten, updated, or appended. The output information may be deleted. The input information may be transmitted to other devices.

[0178] The determination may be made based on a value represented by 1 bit (0 or 1), or may be made based on a Boolean value (true or false), or may be made by comparing numerical values (for example, comparison with a predetermined value).

[0179] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched and used during execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to being explicitly performed, and may be performed implicitly (for example, by not performing the notification of the predetermined information).

[0180] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc., whether called software, firmware, middleware, microcode, a hardware description language, or by any other name.

[0181] Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, when software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cables, optical fiber cables, twisted pairs, Digital Subscriber Line (DSL), etc.) and wireless technologies (such as infrared rays, microwaves, etc.), at least one of these wired technologies and wireless technologies is included within the definition of the transmission medium.

[0182] The information, signals, etc. described in the present disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0183] In addition, with regard to the terms described in this disclosure and the terms necessary for understanding this disclosure, they 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). Also, a signal may be a message. Also, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

[0184] The terms "system" and "network" used in this disclosure are used interchangeably.

[0185] Also, the information, parameters, etc. described in this disclosure may be represented using absolute values, relative values from a predetermined value, or corresponding other information. For example, a radio resource may be indicated by an index.

[0186] The names used for the above-described parameters are not limiting in any way. Furthermore, mathematical formulas and the like using these parameters may be different from those explicitly disclosed in this disclosure. Since various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting in any way.

[0187] In the present 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. The base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0188] A base station can accommodate one or more (e.g., three) cells (also referred to as sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each of these smaller areas can also provide communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0189] The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of a base station that provides communication services in this coverage and a base station subsystem.

[0190] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" may be used interchangeably.

[0191] 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 term.

[0192] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves unmanned (e.g., a drone, a self-driving vehicle, etc.), or a robot (humanoid or unmanned). Note that at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0193] Also, the base station in the present disclosure may be read as a mobile station (user terminal, the same hereinafter). For example, for a configuration in which communication between the base station and the mobile station is replaced with communication between a plurality of mobile stations (which may also be referred to as, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the base station may be configured as functions of the mobile station. Also, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (e.g., "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0194] Similarly, the mobile station in the present disclosure may be read as a base station. In this case, the functions of the mobile station may be configured as functions of the base station.

[0195] The wireless frame may be composed of one or more frames in the time domain.

[0196] In the time domain, each of the one or more frames may be called a subframe. The subframe may further be composed of one or more slots in the time domain.

[0197] The subframe may have a fixed time length (e.g., 1 ms) that does not depend on numerology.

[0198] Numerology may be communication parameters applied to at least one of transmission and reception of a certain signal or channel. Numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame configuration, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the time domain, etc.

[0199] The slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. The slot may be a time unit based on numerology.

[0200] The slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, the mini-slot may be called a sub-slot. The mini-slot may be composed of a smaller number of symbols than the slot. The PDSCH (or PUSCH) transmitted in a time unit larger than the mini-slot may be called PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the mini-slot may be called PDSCH (or PUSCH) mapping type B.

[0201] The radio frame, sub-frame, slot, mini-slot, and symbol all represent time units when transmitting signals. Different names corresponding to each of them may also be used.

[0202] For example, one sub-frame may be called a transmission time interval (TTI), a plurality of consecutive sub-frames may be called TTI, or one slot or one mini-slot may be called TTI. That is, at least one of the sub-frame and TTI may be the sub-frame (1 ms) in the existing LTE, or a period shorter than 1 ms (e.g., 1 - 13 symbols), or a period longer than 1 ms. Note that the unit representing TTI may be called a slot, mini-slot, etc. instead of a sub-frame.

[0203] Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used at each user terminal) to each user terminal in units of TTI. Note that the definition of TTI is not limited to this.

[0204] The TTI may be a transmission time unit such as a channel-coded data packet (transport block), code block, codeword, etc., or may be a processing unit such as scheduling and link adaptation. When the TTI is given, the time interval (e.g., the number of symbols) in which a transport block, code block, codeword, etc. are actually mapped may be shorter than the TTI.

[0205] In addition, when one slot or one mini-slot is called a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit of scheduling. Also, the number of slots (mini-slots) constituting the minimum time unit of the scheduling may be controlled.

[0206] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI shorter than the normal TTI may be called a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini-slot, sub-slot, slot, etc.

[0207] Note that the long TTI (e.g., normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and the short TTI (e.g., shortened TTI, etc.) may be read as a TTI having a TTI length less than that of the long TTI and not less than 1 ms.

[0208] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of consecutive subcarriers in the frequency domain.

[0209] The number of subcarriers included in an RB may be the same regardless of the numerology, for example, it may be 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0210] Also, the time domain of an RB may include one or more symbols, and may be the length of 1 slot, 1 mini-slot, 1 sub-frame, or 1 TTI. 1 TTI, 1 sub-frame, etc. may each be composed of one or more resource blocks.

[0211] Note that one or more RBs may be referred to as Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0212] Also, a resource block may be composed of one or more Resource Elements (RE). For example, 1 RE may be a radio resource area of 1 subcarrier and 1 symbol.

[0213] A Bandwidth Part (BWP) (which may also be called a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (common RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. A PRB is defined within a certain BWP and may be numbered within that BWP.

[0214] The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). For a UE, one or more BWPs may be set within one carrier.

[0215] At least one of the configured BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that terms such as "cell" and "carrier" in the present disclosure may be read as "BWP".

[0216] The structures such as the radio frames, sub-frames, slots, mini-slots, and symbols described above are merely examples. For example, the number of sub-frames included in a radio frame, the number of slots per sub-frame or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of sub-carriers included in an RB, as well as the number of symbols within a TTI, symbol length, Cyclic Prefix (CP) length, etc. can be changed in various ways.

[0217] The terms "connected" and "coupled", or any variations thereof, mean any direct or indirect connection or coupling between two or more elements, and can 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 can be physical, logical, or a combination of these. For example, "connected" may be read as "accessed". As used in the present disclosure, two elements can be considered to be "connected" or "coupled" to each other using at least one of one or more electric wires, cables, and printed electrical connections, and also, as some non-limiting and non-exhaustive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region, and optical (both visible and invisible) region.

[0218] The reference signal can also be abbreviated as Reference Signal (RS) and may be called a Pilot depending on the applicable standard.

[0219] As used in this disclosure, the recitation "based on" does not mean "based only on" unless otherwise specified. In other words, the recitation "based on" means both "based only on" and "based at least on".

[0220] In the configuration of each of the above devices, the "means" may be replaced with "section", "circuit", "device", etc.

[0221] Any reference to an element using designations such as "first", "second", etc. used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Therefore, a reference to a first and a second element does not mean that only two elements may be employed there or that the first element must precede the second element in any way.

[0222] In this disclosure, when terms such as "include", "including" and their variations are used, these terms are intended to be inclusive in the same manner as the term "comprising". Further, the term "or" used in this disclosure is not intended to be an exclusive disjunction.

[0223] In this disclosure, for example, when articles are added by translation, such as a, an and the in English, this disclosure may include that the nouns following these articles are in the plural form.

[0224] As used in this disclosure, the terms "determining" and "deciding" may encompass a wide variety of operations. "Determining" and "deciding" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or another data structure), ascertaining, and considering something as having been "determined" or "decided". Also, "determining" and "deciding" may include considering something as having been "determined" or "decided" after receiving (e.g., receiving information), transmitting (e.g., transmitting information), inputting, outputting, accessing (e.g., accessing data in a memory), etc. Further, "determining" and "deciding" may include considering something as having been "determined" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. That is, "determining" and "deciding" may include considering that some operation has been "determined" or "decided". Also, "determining (deciding)" may be read as "assuming", "expecting", "considering", etc.

[0225] In this disclosure, the term "A and B are different" may mean that "A and B are different from each other". Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may be interpreted in the same way as "different".

[0226] FIG. 12 shows a configuration example of the vehicle 2001. As shown in FIG. 12, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right 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.

[0227] The drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.

[0228] The steering unit 2003 includes at least a steering wheel (also called a handwheel), and is configured to steer at least one of the front wheels and the rear wheels based on an operation of the steering wheel operated by a user.

[0229] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2027 provided in the vehicle are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0230] Signals from various sensors 2021 to 2028 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front or rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front or 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, a depression amount signal of the accelerator pedal obtained by an accelerator pedal sensor 2029, a depression amount signal of the brake pedal obtained by a brake pedal sensor 2026, an operation signal of the shift lever obtained by a shift lever sensor 2027, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028, and the like.

[0231] The information service unit 2012 is composed of various devices for providing various information such as driving information, traffic information, and entertainment information, such as a car navigation system, an audio system, speakers, a television, and a radio, and one or more ECUs for controlling these devices.

[0232] The information service unit 2012 uses the information acquired from an external device via a communication module 2013 or the like to provide various multimedia information and multimedia services to the passengers of the vehicle 1.

[0233] The driving assistance system unit 2030 is composed of various devices for providing functions for preventing accidents and reducing the driving load of the driver, such as a millimeter-wave radar, 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., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, and one or more ECUs for controlling these devices. Further, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize a driving assistance function or an autonomous driving function.

[0234] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 1 via a communication port. For example, the communication module 2013 transmits and receives data to and from the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the left and right front wheels 2007, the left and right rear wheels 2008, the axle 2009, the microprocessor 2031 and the memory (ROM, RAM) 2032 in the electronic control unit 2010, and the sensors 2021 to 2028 provided in the vehicle 2001 via the communication port 2033.

[0235] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it transmits and receives various information via wireless communication with external devices. 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.

[0236] The communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication. In addition, the communication module 2013 also transmits, via wireless communication to an external device, the rotational speed signals of the front and rear wheels acquired by the rotational speed sensor 2022, the air pressure signals of the front and rear wheels acquired by the air pressure sensor 2023, the vehicle speed signal acquired by the vehicle speed sensor 2024, the acceleration signal acquired by the acceleration sensor 2025, the depression amount signal of the accelerator pedal acquired by the accelerator pedal sensor 2029, the depression amount signal of the brake pedal acquired by the brake pedal sensor 2026, the operation signal of the shift lever acquired by the shift lever sensor 2027, and the detection signals for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028, etc., which are input to the electronic control unit 2010.

[0237] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle. In addition, the communication module 2013 stores the various information received from the external device in the 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, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the left and right front wheels 2007, the left and right rear wheels 2008, the axle 2009, the sensors 2021 - 2028, etc. provided in the vehicle 2001.

[0238] As described above in detail, it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented in modified and changed forms without departing from the spirit and scope of the present disclosure defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes only and has no restrictive meaning for the present disclosure.

Description of Reference Numerals

[0239] 10 Wireless communication system 20 NG-RAN 100 gNB 200 UE 210 Wireless signal transceiver 220 Amplifier section 230 Modulation / demodulation section 240 Control signal / reference signal processing section 250 Encoding / decoding section 260 Data transceiver 270 Control section 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus 2001 Vehicle 2002 Driving section 2003 Steering section 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Left and right front wheels 2008 Left and right rear wheels 2009 Axle 2010 Electronic control unit 2012 Information service section 2013 Communication module 2021 Current sensor 2022 Rotation speed sensor 2023 Air pressure sensor 2024 Vehicle Speed Sensor 2025 Acceleration Sensor 2026 Brake Pedal Sensor 2027 Shift Lever Sensor 2028 Object Detection Sensor 2029 Accelerator Pedal Sensor 2030 Driving Assistance System Unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication Port

Claims

1. A transmitting unit that transmits capability information including the maximum value of a Time Domain Window (TDW) which is a period of multiple slots or more, and repeatedly transmits an uplink channel in the TDW; A terminal comprising a control unit that determines the length of the TDW based on the capability information and the number of transmissions or the number of allocated slots of the uplink channel when the length of the TDW is not indicated from the network.

2. A wireless communication system including a terminal and a radio base station, wherein the terminal has a transmitting unit that transmits capability information including the maximum value of a Time Domain Window (TDW) which is a period of multiple slots or more, and repeatedly transmits an uplink channel in the TDW; comprises a control unit that determines the length of the TDW based on the capability information and the number of transmissions or the number of allocated slots of the uplink channel when the length of the TDW is not indicated from the network, and the radio base station is a wireless communication system comprising a receiving unit that receives the uplink channel.

3. A step in which a terminal transmits capability information including the maximum value of a Time Domain Window (TDW) which is a period of multiple slots or more, and repeatedly transmits an uplink channel in the TDW; A wireless communication method including a step in which the terminal determines the length of the TDW based on the capability information and the number of transmissions or the number of allocated slots of the uplink channel when the length of the TDW is not indicated from the network. ​

Images