Repeater, base station, wireless system, and communication method

Abstract

A repeater comprises: a reception unit that receives control information through a first link used for the exchange of control information between a base station and the repeater; and a control unit that determines, on the basis of the control information, a time resource allocated to the repeater for a second link used for transferring signals between the base station and a terminal.

Description

Repeater and communication method

[0001] The present disclosure relates to a repeater and a communication method.

[0002] Long Term Evolution (LTE) has been specified for Universal Mobile Telecommunication System (UMTS) networks to achieve higher data rates and lower latency. Furthermore, successor systems to LTE are also being considered to achieve even greater bandwidth and speed than LTE. Examples of successor systems to LTE include LTE-Advanced (LTE-A), Future Radio Access (FRA), 5th generation mobile communication system (5G), 5G plus (5G+), Radio Access Technology (New-RAT), and New Radio (NR).

[0003] In 3GPP Rel-18, a study item (SI) on network-controlled repeaters was established (see, for example, Non-Patent Document 1). It was decided that network-controlled repeaters, which differ from conventional amplify-and-forward repeaters, will be studied for beam control, timing control, and power ON / OFF control in downlink-uplink (DL-UL).

[0004] The network-controlled repeater may also be referred to as an NR network-controlled repeater or a smart repeater. Hereinafter, the network-controlled repeater may simply be referred to as a repeater.

[0005] 3GPP TSG RAN Meeting #94e,RP-213700,Electronic Meeting, Dec.6-17,20213GPP TS 38.214 V17.3.0 (2022-09)

[0006] However, there is room for consideration regarding the allocation of time resources in the repeater for the link that transfers signals between the base station and the terminal.

[0007] One aspect of the present disclosure is to provide a repeater and a communication method that can appropriately allocate time resources in the repeater for a link that transfers a signal between a base station and a terminal.

[0008] A repeater according to one aspect of the present disclosure includes a receiving unit that receives control information via a first link used for exchanging the control information between a base station and the repeater, and a control unit that determines, based on the control information, time resources allocated to the repeater in a second link used for transferring signals between the base station and a terminal.

[0009] A communication method according to one aspect of the present disclosure is a communication method for a repeater, which receives control information via a first link used for exchanging control information between a base station and the repeater, and determines, based on the control information, time resources allocated to the repeater in a second link used for transferring signals between the base station and a terminal.

[0010] 1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present disclosure. FIG. 1 is a diagram illustrating an example of FR used in the wireless communication system. FIG. 2 is a diagram illustrating example configurations of radio frames, subframes, and slots used in the wireless communication system. FIG. 3 is a diagram illustrating an example configuration of NCR. FIG. 4 is a diagram illustrating an example of a start symbol S and number of symbols L recognized by a UE as a valid PDSCH allocation. FIG. 5 is a diagram illustrating an example of a start symbol S and number of symbols L recognized by a UE as a valid PUSCH allocation. FIG. 6 is a diagram illustrating Proposal 2.1 - Option 1. FIG. 7 is a diagram illustrating Proposal 2.2. FIG. 8 is a diagram illustrating Proposal 2.2. FIG. 9 is a diagram illustrating PDSCH repetition. FIG. 10 is a diagram illustrating PUSCH repetition type A. FIG. 11 is a diagram illustrating PUSCH repetition type B. FIG. 12 is a diagram illustrating Proposal 4.1 - Option 1. FIG. 13 is a diagram illustrating Proposal 4.1 - Option 2. FIG. 14 is a diagram illustrating repetition and TBoMS. FIG. 15 is a diagram illustrating Proposal 4.2. FIG. 16 is a diagram illustrating available slot count. FIG. 17 is a diagram illustrating Proposal 4.3. FIG. 18 is a diagram illustrating an example of a TDRA table. FIG. 19 is a diagram illustrating multi-PDSCH / multi-PUSCH. FIG. 19 is a diagram illustrating Proposal 5.2. FIG. 19 is a diagram illustrating an example of a TDRA table. While the present disclosure has been described with reference to exemplary embodiments, it is to be understood that the present disclosure is not limited to the disclosed exemplary embodiments and is not to be construed as limiting the scope of the present disclosure.

[0011] Hereinafter, an embodiment according to one aspect of the present disclosure will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present disclosure is applied is not limited to the following embodiment.

[0012] Furthermore, in the embodiments of the present disclosure described below, terms used in 5G NR (New Radio), such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), are used. This is for convenience of description, and similar signals, functions, etc. may be called by other names.

[0013] Furthermore, in the embodiments of the present disclosure, the duplex method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or another method (for example, flexible duplex, etc.).

[0014] Furthermore, in the embodiments of the present disclosure, "configuring" radio parameters and the like may mean that predetermined values ​​are pre-configured, or that radio parameters notified from a base station or a terminal are set.

[0015] <Wireless Communication System> Fig. 1 is a diagram illustrating an example of a wireless communication system 10 according to an embodiment of the present disclosure. The wireless communication system 10 is a wireless communication system conforming to 5G NR, and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20) and a terminal 200 (hereinafter, also referred to as UE (User Equipment) 200).

[0016] The wireless communication system 10 may be a wireless communication system conforming to a system called Beyond 5G, 5G Evolution, or 6G.

[0017] The NG-RAN 20 includes a base station 100 (hereinafter also referred to as a gNB 100). Note that the number of gNBs and UEs is not limited to the example shown in FIG. 1 .

[0018] 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 5GC may be simply referred to as a "network." In the following description, gNB may be replaced with network (NW).

[0019] As an example, the gNB 100 is a base station conforming to 5G, and performs 5G wireless communication with the UE 200. The example shown in FIG. 1 also shows a repeater 300 that relays signals between the gNB 100 and the UE 200. The repeater 300 performs a relay operation, for example, transmitting a signal received from the gNB 100 to the UE 200 and transmitting a signal received from the UE 200 to the gNB 100. Note that "relay" may be replaced with "forward." Furthermore, "operation" may be replaced with "processing," "control," or the like. The repeater 300 considered in NR will be described later.

[0020] The gNB 100 and the UE 200 may support MIMO (Multiple-Input Multiple-Output), which generates more directional beams by controlling radio signals transmitted from multiple antenna elements, carrier aggregation (CA), which bundles and uses multiple component carriers (CC), and dual connectivity (DC), which communicates between the UE and each of two NG-RAN nodes.

[0021] The wireless communication system 10 may support multiple frequency ranges (FR).

[0022] 2 is a diagram showing an example of FRs used in the wireless communication system 10. As shown in Fig. 2, the wireless communication system 10 may support FR1 and FR2. The frequency bands of each FR are, for example, as follows:

[0023] ・FR1: 410MHz ~ 7.125GHz ・FR2: 24.25GHz ~ 52.6GHz

[0024] FR1 may use a sub-carrier spacing (SCS) of 15 kHz, 30 kHz, 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 kHz or 120 kHz (including 240 kHz), and a bandwidth (BW) of 50 to 400 MHz.

[0025] Note that SCS may be interpreted as numerology, which is defined in 3GPP TS 38.300 and corresponds to one subcarrier spacing in the frequency domain.

[0026] Furthermore, the wireless communication system 10 may 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. For convenience, such a high frequency band may be referred to as "FR2x." When using a frequency band exceeding 52.6 GHz, CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) / DFT-S-OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing) with a larger SCS may be applied.

[0027] 3 is a diagram showing an example of the configuration of a radio frame (system frame), subframe, and slot used in the radio communication system 10. As shown in FIG. 3, one slot is composed of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). However, the SCS is not limited to the interval (frequency) shown in FIG. 3. For example, 480 kHz, 960 kHz, etc. may be used as the SCS.

[0028] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, it may be 28 or 56 symbols, etc.) Furthermore, the number of slots per subframe may differ depending on the SCS.

[0029] The time direction (t) shown in Fig. 3 may be called a time domain, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP), etc.

[0030] The gNB 100 transmits control information, configuration information, etc. of the gNB 100 to the UE 200 as a downlink (DL) signal.

[0031] Furthermore, for example, gNB100 receives control information of gNB100, data signals, information regarding the processing capabilities of UE200 (terminal capabilities (information); for example, UE capability), etc. from UE200 as uplink (UL) signals.

[0032] The repeater 300 performs a forwarding operation to forward the DL signal to the UE 200. The repeater 300 also performs a forwarding operation to forward the UL signal to the gNB 100. Note that, hereinafter, the UL signal that the gNB 100 receives from the UE 200 and / or the DL signal that the UE 200 receives from the gNB 100 may be a signal relayed by the repeater 300.

[0033] The UE 200 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module.

[0034] The UE 200 receives a control signal or a data signal from the gNB 100 via DL and transmits a control signal or a data signal to the gNB 100 via UL, thereby utilizing various communication services provided by the wireless communication system 10. The UE 200 also receives various reference signals transmitted from the gNB 100 and performs measurement of propagation path quality based on the reception results of the reference signals.

[0035] Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channel may include a physical downlink shared channel (PDSCH), and the control channel may include a physical downlink control channel (PDCCH). For example, the gNB 100 transmits control information to the UE 200 using the PDCCH, and transmits DL data signals using the PDSCH. Note that the PDSCH is an example of a downlink shared channel, and the PDCCH is an example of a downlink control channel. Note that the PDCCH may be interpreted as downlink control information (DCI), control information, etc. transmitted in the PDCCH.

[0036] The reference signal included in the DL signal may include, for example, at least one of a DMRS (Demodulation Reference Signal), a PTRS (Phase Tracking Reference Signal), a CSI-RS (Channel State Information - Reference Signal), an SRS (Sounding Reference Signal), and a PRS (Positioning Reference Signal) for position information. For example, the reference signals such as the DMRS and the PTRS are used for demodulating the DL data signal and are transmitted using the PDSCH.

[0037] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channel may include a Physical Uplink Shared Channel (PUSCH), and the control channel may include a Physical Uplink Control Channel (PUCCH). For example, the UE 200 transmits control information using the PUCCH and transmits UL data signals using the PUSCH. Note that the PUSCH is an example of an uplink shared channel, and the PUCCH is an example of an uplink control channel. The shared channel may also be called a data channel. Note that the PUSCH or the PUCCH may be interpreted as uplink control information (UCI), control information, etc. transmitted in the PUSCH or the PUCCH.

[0038] The reference signal included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRSRS, and PRS for location information. For example, the reference signal such as DMRS or PTRS is used for demodulating the UL data signal and is transmitted using the PUSCH.

[0039] <About Repeaters> 3GPP Release 18 (Rel-18) includes new considerations regarding network-controlled repeaters in NR. Hereinafter, the network-controlled repeater may be abbreviated as NCR. The NCR may correspond to the repeater 300 in FIG. 1, for example. Hereinafter, the NCR may be referred to as NCR 300.

[0040] Fig. 4 is a diagram showing an example of the configuration of the NCR 300. Fig. 4 also shows the gNB 100 and the UE 200 shown in Fig. 1.

[0041] NCR 300 exists between UE 200 and gNB 100. Note that NCR 300 may or may not exist between UE 200 and gNB 100 in the real space.

[0042] 4, for example, one link (one type) exists between the NCR 300 and the UE 200. The link between the NCR 300 and the UE 200 may be referred to as an access link.

[0043] 4, for example, there are two (two types of) links between the NCR 300 and the gNB 100. Of the two links, the link that exchanges information between the gNB 100 and the NCR 300 may be referred to as a control link or a C-link. Of the two links, the link that relays signals between the gNB 100 and the UE 200 may be referred to as a backhaul link.

[0044] Note that Figure 4 shows an example in which the gNB 100 included in the control link and the gNB 100 included in the backhaul link are the same, but the gNB 100 included in the control link and the gNB 100 included in the backhaul link may be different from each other.

[0045] NCR 300 receives an UL signal addressed to gNB 100 transmitted from UE 200 via an access link. NCR 300 transmits the received UL signal to the destination gNB 100 via a backhaul link. In other words, NCR 300 forwards the UL signal addressed to gNB 100 transmitted from UE 200 to the destination gNB 100.

[0046] The NCR 300 receives a DL signal addressed to the UE 200 transmitted from the gNB 100 via a backhaul link. The NCR 300 transmits the received DL signal to the destination UE 200 via an access link. In other words, the NCR 300 forwards the signal addressed to the UE 200 transmitted from the gNB 100 to the destination UE 200.

[0047] The NCR 300 exchanges side control information (hereinafter, sometimes referred to as SCI) via the control link.

[0048] As shown in FIG. 4, the NCR 300 has two functional entities called NCR-MT and NCR-Fwd.

[0049] The NCR-MT is a functional entity that communicates with the gNB 100 via a control link and enables information exchange with the gNB 100. The information exchange with the gNB 100 may be, for example, transmission and reception of SCI. The control link may be based on the NR Uu interface.

[0050] In NCR-MT, the SCI may include at least information for controlling NCR-Fwd. The SCI may be notified by at least one signaling of RRC (radio resource control), MAC CE (medium access control element), and DCI (downlink control information).

[0051] The NCR-Fwd is a functional entity that forwards signals between the gNB and the UE via the backhaul link and the access link. For example, the NCR-Fwd amplifies and forwards the UL radio frequency (RF) signal. The NCR-Fwd also amplifies and forwards the DL RF signal.

[0052] The NCR-Fwd may be controlled based on the SCI received from the gNB 100. For example, the operation of the NCR-Fwd may be controlled by the NCR-MT that has received the SCI.

[0053] <Agreements on Repeaters> Several agreements have been reached in 3GPP regarding NCR. Four agreements are described below.

[0054] Agreement 1: It is agreed that the time domain resource corresponding to the access link beam is explicitly indicated. For example, it is agreed that the time domain resource corresponding to the access link beam may be determined by the following options:

[0055] Optional: Explicit decision based on explicitly specified time domain resources per beam direction

[0056] It was discussed that the indicated time domain resource may include indications such as a start time unit, a duration, a slot index, and a start and length indicator (SLIV).

[0057] Agreement 2: It was agreed that ON-OFF control of NCR is supported. For example, it was agreed that ON-OFF control information is valid for controlling the operation (or behavior) of NCR-Fwd.

[0058] Agreement 3: It was agreed that DL-UL (TDD) control of NCR-Fwd may be indicated by new signaling. For flexible symbols based on semi-static configurations, e.g., TDD-UL-DL-ConfigCommon and / or TDD-UL-DL-ConfigDedicated, the following options are considered:

[0059] Option 1: NCR-Fwd is assumed to be off or not to transmit flexible symbols. Option 2: NCR-Fwd follows TDD operation as determined by NCR-MT, i.e., the operation of NCR-Fwd is determined by NCR-MT based on Slot Format Indicator (SFI) indication or scheduling received from the gNB. Option 3: NCR-Fwd follows new dynamic side control signaling of DL / UL transmission for NCR-Fwd via flexible symbols.

[0060] Agreement 4: It was agreed that the backhaul link beam of NCR-Fwd may be indicated by new signaling. For example, when adaptive beamforming is applied to the control link and backhaul link, the following options are considered for indicating and determining the backhaul link beam:

[0061] Option 1: The beam of the backhaul link is instructed by new signaling. Option 2: The beam of the backhaul link is determined by a predefined rule.

[0062] Note that in slots and / or symbols where DL reception and UL transmission occur simultaneously on both the control link and the backhaul link, the beam for the backhaul link may be the same as the beam for the control link, otherwise the beam for the backhaul link may follow.

[0063] <Regarding PDSCH Time Domain Resource Allocation> DCI for scheduling PDSCH has a TDRA (Time Domain Resource Assignment or Allocation) field indicating a row index. For example, the terminal refers to a table that associates row indexes with information on time domain resource allocation based on the value of the row index in the TDRA field included in the DCI, and determines the time domain resource (PDSCH) allocated to the terminal. Note that the information on time domain resource allocation may be referred to as a parameter. The table may also be referred to as a list.

[0064] The information included in the table (information related to PDSCH allocation) is notified using higher layer signaling such as RRC. For example, the information included in the table is notified using an information element (IE) such as PDSCH-TimeDomainResourceAllocationList.

[0065] The information included in the table may include, for example, information indicating an offset from the slot in which the DCI is received to the slot in which the PDSCH is allocated. This offset may be referred to as k0.

[0066] The table also includes information indicating the PDSCH mapping type, which may be type A or type B, for example.

[0067] The information included in the table also includes the start symbol S of the PDSCH and the number L of consecutive symbols of the PDSCH. S and L are notified, for example, by the SLIV. The SLIV is indicated, for example, by a value between 0 and 127. The SLIV is calculated based on the following rules.

[0068] if (L-1)≦7then SLIV = 14(L-1)+S else SLIV = 14(14-L+1)+(14-1-S) Where 0<L≦14-S, S = Start Symbol Index, L = Number of Consecutive Symbols

[0069] The terminal derives S and L to be included in the table based on the SLIV notified using higher layer signaling and the above rules, for example.

[0070] Fig. 5 is a diagram showing an example of a start symbol S and number of symbols L recognized by a UE as a valid PDSCH allocation (see Table 5.1.2.1-1 in Non-Patent Document 2). As shown in Fig. 5, the values ​​of S and L recognized as a valid PDSCH allocation may be indicated for at least one of a PDSCH mapping type and a cyclic prefix (CP) length.

[0071] For normal CP, S and L are a valid combination if they satisfy "S0+S+L≦14". For extended CP, S and L are a valid combination if they satisfy "S0+S+L≦12".

[0072] Note that S0 is a reference point for S. In the case of DCI format 1_2, S0 is the start symbol of the PDCCH monitoring opportunity in which DCI is detected. In other cases, "S0=0".

[0073] <Regarding PUSCH time domain resource allocation> DCI for scheduling PUSCH has a TDRA field indicating a row index. The terminal, for example, refers to a table that associates row indexes with information on time domain resource allocation based on the row index value of the TDRA field included in the DCI, and determines the time domain resource (PUSCH) allocated to the terminal.

[0074] The information included in the table (information related to PUSCH allocation) is notified using higher layer signaling such as RRC. For example, the information included in the table is notified using an IE such as PUSCH-TimeDomainResourceAllocationList.

[0075] The information included in the table may include, for example, information indicating an offset from the slot in which the DCI is received to the slot in which the PUSCH is allocated. This offset may be referred to as k2.

[0076] The table also includes information indicating a PUSCH mapping type, which may be, for example, type A or type B.

[0077] The information included in the table also includes the start symbol S of the PUSCH and the number L of consecutive symbols of the PUSCH. S and L are notified, for example, by the SLIV. The SLIV is indicated, for example, by a value between 0 and 127. The SLIV is calculated based on the following rules.

[0078] if (L-1)≦7then SLIV = 14(L-1)+S else SLIV = 14(14-L+1)+(14-1-S) Where 0<L≦14-S, S = Start Symbol Index, L = Number of Consecutive Symbols

[0079] The terminal derives S and L to be included in the table based on the SLIV notified using higher layer signaling and the above rules, for example.

[0080] Alternatively, the start symbol of the PUSCH may be directly indicated by a start symbol field included in the DCI or RRC. The number of consecutive symbols of the PUSCH may be directly indicated by a length field included in the DCI or RRC.

[0081] In the PUSCH, S is set to the start point (first symbol) of the slot as a reference point.

[0082] Fig. 6 is a diagram showing an example of a start symbol S and number of symbols L recognized by a UE as a valid PUSCH allocation (see Table 6.1.2.1-1 in Non-Patent Document 2). As shown in Fig. 6, values ​​of S and L recognized as a valid PUSCH allocation may be indicated for at least one of a PUSCH mapping type and a CP length.

[0083] <Regarding Time Domain Resources of NCR> The NCR-Fwd may be instructed (allocated) by the SCI about time domain resources for the NCR-Fwd. In other words, the NCR may be instructed by the SCI about time domain resources that the NCR can use on the access link and / or the backhaul link. The time domain resources that the NCR can use on the access link and / or the backhaul link may be referred to as applicable time domain resources, for example.

[0084] The applicable time resources of NCR-Fwd may be allocated, for example, to the following signals:

[0085] ・DL Tx beam / UL Rx beam indication in the access link of NCR-Fwd ・DL Rx beam / UL Tx beam indication in the backhaul link of NCR-Fwd ・NCR-Fwd ON-OFF indication ・NCR-Fwd DL-UL (TDD) indication

[0086] In the following, the applicable time domain resource of NCR-Fwd may be referred to as ATDR. In the following, "and / or" may be referred to as " / ". The applicable time domain resource may be rephrased as applicable time domain resource. The time domain resource may be referred to as time resource or resource.

[0087] <Study 1> In 3GPP, when an NCR determines the ATDR of an NCR-Fwd, there is no provision for how to set the SCS / CP of that ATDR (carrier or signal). Therefore, an NCR may not be able to properly forward signals in the ATDR of an NCR-Fwd.

[0088] For example, there is no provision for what SCS to set in the ATDR of the NCR-Fwd in the access link described in Fig. 4 and whether the CP should be set to a normal CP or an extended CP. Also, there is no provision for what SCS to set in the ATDR of the NCR-Fwd in the backhaul link described in Fig. 4 and whether the CP should be set to a normal CP or an extended CP.

[0089] Therefore, for example, in the SCS / CP of the ATDR of the NCR-Fwd, there may be a discrepancy between the SCS / CP recognized by the NCR based on the information held by the NCR-MT and the SCS / CP used by the terminal / base station, and the NCR may not be able to transfer signals properly.

[0090] Therefore, the following Proposal 1 is provided to enable the NCR to properly forward signals.

[0091] <Proposal 1> NCR sets the SCS / CP in the ATDR of NCR-Fwd based on the following Alt.1 to Alt.3. For example, NCR sets the SCS / CP in the ATDR of the access link / backhaul link shown in Figure 4 based on the following Alt.1 to Alt.3.

[0092] <Proposal 1-Alt.1> NCR assumes that the SCS / CP in the ATDR of NCR-Fwd is the same as the SCS / CP in NCR-MT. The word "assume" may be interpreted as "set," "understand," "understand," or "decide."

[0093] For example, if the SCS of the NCR-MT (carrier or signal in the control link) shown in Figure 4 is 15 kHz and the CP is a normal CP, the NCR assumes that the SCS in the ATDR of the NCR-Fwd is 15 kHz and the CP is a normal CP. Note that the NCR may assume that the SCS / CP in the ATDR of the NCR-Fwd are the same as the SCS / CP of the SCI that instructed the allocation of the ATDR of the NCR-Fwd.

[0094] Proposal 1-Alt.1 further provides the following Alt.1-1 to Alt.1-3.

[0095] <Proposal 1-Alt.1-Alt.1-1> If the NCR-MT has multiple serving cells / BWPs, the NCR assumes that the SCS / CP of the NCR-Fwd is the same as one of the serving cells / BWPs of the NCR-MT determined from a predefined rule.

[0096] For example, the NCR assumes that the SCS / CP in the ATDR of the NCR-Fwd is the same as the SCS / CP of the serving cell / BWP with the smallest cell index of the NCR-MT.

[0097] For example, the NCR assumes that the SCS / CP in the ATDR of the NCR-Fwd is the same as the SCS / CP of the serving cell / BWP with the highest cell index of the NCR-MT.

[0098] For example, NCR assumes that the SCS / CP in the ATDR of NCR-Fwd is the same as the SCS / CP of the serving cell / BWP in the initial access, such as the random access of NCR-MT.

[0099] <Proposal 1-Alt.1-Alt.1-2> When an NCR-MT has multiple serving cells / BWPs, the NCR assumes that the SCS / CP of the NCR-Fwd is the same as the serving cell / BWP that received the SCI.

[0100] For example, the NCR-MT of the NCR receives an SCI instructing it to use beam #1 among multiple beams in the DL of the access link in the serving cell with a 15 kHz SCS and a normal CP. In this case, the NCR-Fwd of the NCR transmits beam #1 in the ATDR in the DL of the access link, which is set to a 15 kHz SCS and a normal CP.

[0101] <Proposal 1-Alt.1-Alt.1-3> NCR will assume that the SCS / CP in the DL and UL of the ATDR of NCR-Fwd is the same as the SCS / CP in the DL and UL of NCR-MT.

[0102] For example, if the SCS in the DL of the NCR-MT shown in Figure 4 is 30 kHz and the CP is the normal CP, the NCR assumes that the SCS of the ATDR in the DL of the NCR-Fwd is 30 kHz and the CP is the normal CP.Also, if the SCS in the UL of the NCR-MT shown in Figure 4 is 15 kHz and the CP is the normal CP, the NCR assumes that the SCS of the ATDR in the UL of the NCR-Fwd is 15 kHz and the CP is the normal CP.

[0103] <Proposal 1-Alt.2> The SCS / CP in the ATDR of NCR-Fwd is predefined. For example, the SCS / CP in the ATDR of NCR-Fwd is predefined by the specification.

[0104] For example, 15 kHz is predefined as the SCS in the ATDR of the NCR-Fwd. A normal CP is predefined as the CP in the ATDR of the NCR-Fwd.

[0105] The SCS / CP in the ATDR of NCR-Fwd may be predefined to different values ​​depending on the FR. For example, in FR1, the SCS in the ATDR of NCR-Fwd is predefined to be 15 kHz. For example, in FR2, the SCS in the ATDR of NCR-Fwd is predefined to be 60 kHz.

[0106] <Proposal 1-Alt.3> The SCS / CP in the ATDR of NCR-Fwd is set semi-statically / indicated dynamically in the SCI.

[0107] For example, the SCS / CP of the ATDR in a Synchronization Signal Block (SSB), a PDCCH monitoring occasion, or a UL RACH occasion is semi-statically configured by the SCI of higher layer signaling such as RRC and / or MAC CE. For example, the SCS / CP of the ATDR in a PDSCH / PUSCH is dynamically indicated by the SCI of lower layer signaling such as DCI.

[0108] NCR may apply "Proposal 1-Alt.1" or "Proposal 1-Alt.2" if SCS / CP is not configured / indicated by SCI.

[0109] <Summary of Proposal 1> As explained above, the SCS / CP in the ATDR of the NCR-Fwd is assumed to be the same as the SCS / CP in the NCR-MT. Alternatively, the SCS / CP in the ATDR of the NCR-Fwd is predefined. Alternatively, the SCS / CP in the ATDR of the NCR-Fwd is semi-statically set and / or dynamically indicated in the SCI.

[0110] With this configuration, the NCR can suppress discrepancies between the SCS / CP of the ATDR of the NCR-Fwd and the SCS / CP of the base station / terminal, allowing signals to be transferred appropriately.

[0111] <Study 2> 3GPP does not specify which slot the ATDR of NCR-Fwd is included in (is assigned to or set in). Therefore, NCR may not be able to properly forward signals in the ATDR of NCR-Fwd.

[0112] Therefore, the following proposal 2.1 is provided to enable the NCR to properly forward signals.

[0113] Furthermore, when multiple slots including the ATDR of NCR-Fwd are notified using (via) the SCI, it is important to reduce the overhead of the SCI.

[0114] Therefore, in order to reduce the overhead of SCI, the following proposal 2.2 is provided.

[0115] <Proposal 2.1> Proposal 2.1 assumes that the ATDR of NCR-Fwd is included (assigned or configured) in one slot. The slot in which the ATDR of NCR-Fwd is included is indicated based on the following options 1 and 2.

[0116] <Proposal 2.1 - Option 1> The slot index of the ATDR of the NCR-Fwd is indicated as an offset to the slot carrying the SCI.

[0117] Figure 7 is a diagram explaining Proposal 2.1 - Option 1. As shown in Figure 7, the slot index (number) of the slot carrying the SCI is "#n". In other words, the slot index (number) of the SCI received by the NCR-MT is "#n".

[0118] The SCI carried in the slot with slot index "#n" shall contain "k" as an offset indicating the slot containing the ATDR.

[0119] In this case, the ATDR of NCR-Fwd is included in the slot with slot index "#n+k." For example, "#m" shown in FIG. 7 is "#m=#n+k."

[0120] That is, the NCR determines the slot including the ATDR of the NCR-Fwd based on the slot index of the slot in which the SCI was received and the offset included in the received SCI. For example, the NCR includes the ATDR of the NCR-Fwd in a slot after the offset included in the received SCI from the slot in which the SCI was received.

[0121] <Proposal 2.1 - Option 1 - Variation> In Proposal 1, the SCS of the carrier on which the NCR-MT receives the SCI may differ from the SCS of the carrier on which the NCR-Fwd transmits the SCI. If the SCS of the carrier on which the NCR-MT receives the SCI differs from the SCS of the carrier on which the NCR-Fwd transmits the SCI, the ATDR of the NCR-Fwd is included in the slot with the slot index shown in the following equation (1).

[0122] Here, u_SCI is the SCS (SCS configuration) of the carrier on which NCR-MT received the SCI, and u_Fwd is the SCS (SCS configuration) of the carrier on which NCR-Fwd forwards.

[0123] For example, the NCR includes the ATDR of the NCR-Fwd in the slot of the carrier in which the NCR-Fwd performs forwarding after the slot in which the SCS was received, in the slot of the slot index after the offset notified by the SCI.

[0124] <Proposal 2.1 - Option 2> The slot index of the ATDR of NCR-Fwd is indicated directly as a periodic slot index. The period may be predefined, for example, or the period may be set / indicated using the SCI.

[0125] The period may be in units of slots or subframes. The period may be in units of milliseconds or seconds. When the number of slots in a period is P, the slot index candidate values ​​are 0 to P-1.

[0126] <Summary of Proposal 2.1> As explained above, the slot index of the ATDR of NCR-Fwd is indicated as an offset from the slot that carried the SCI, or the slot index of the ATDR of NCR-Fwd is indicated directly as a periodic slot index.

[0127] This configuration allows the NCR to properly determine the slot to which the ATDR of the NCR-Fwd is assigned, and to properly forward the signal.

[0128] The slot in which the ATDR of NCR-Fwd is set may be indicated using an absolute index such as a physical slot index, instead of an offset.

[0129] <Proposal 2.2> Proposal 2.2 assumes that the ATDR of NCR-Fwd is included in multiple slots.

[0130] Fig. 8 is a diagram illustrating Proposal 2.2. In the example of Fig. 8, the ATDR of NCR-Fwd is included in three slots.

[0131] The multiple slots containing the ATDR of NCR-Fwd are indicated by the SCI. For example, the slots "#x", "#y", and "#z" containing the ATDR shown in Figure 8 are indicated by the SCI of slot "#n".

[0132] The SCI has a list index. The slots including the ATDR of the NCR-Fwd are indicated by the list index included in the SCI. The SCI may be signaled by lower layer signaling such as DCI or higher layer signaling such as MAC CE.

[0133] For example, the NCR refers to a list (table) that associates list indices with multiple slots including the ATDR of the NCR-Fwd based on the list index indicated using the SCI, and determines the slot of the ATDR.

[0134] Fig. 9 is a diagram explaining Proposal 2.2. As shown in Fig. 9, a list associates a list index with a plurality of slot indexes. Based on the list index notified using the SCI, the NCR refers to the list shown in Fig. 9 and determines the slot of the ATDR.

[0135] For example, assume that the NCR is notified of list index "0" using the SCI. In this case, the NCR determines slots with slot indexes "#1," "#4," "#5," and "#8" as slots to which the ATDRs are to be assigned, as shown in the dotted-line box A9a in Fig. 9.

[0136] The list shown in FIG. 9 is notified, for example, using SCI. The SCI may be notified, for example, by higher layer signaling such as RRC. Each slot index of each list may be indicated as Proposal 2-1. For example, the "List of slot index" shown in FIG. 9 may be indicated as Proposal 2-1.

[0137] The SCI may be an SCI for controlling NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL. The ATDR of the NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL is determined based on the list and the list index included in the SCI. A list of multiple slot indexes (slots) obtained using the list is the ATDR of the SCI.

[0138] <Summary of Proposal 2.2> As explained above, the NCR refers to a list that associates list indices with multiple slots to which the ATDR of the NCR-Fwd is assigned, based on the list index notified using the SCI, and determines the slot of the ATDR.

[0139] This configuration reduces the overhead of the SCI. For example, the NCR can determine multiple slots including the ATDR of the NCR-Fwd using a single list index instead of multiple slot indexes, which reduces the overhead of the SCI.

[0140] <Study 3> 3GPP does not specify from which symbol the ATDR of NCR-Fwd should start.

[0141] In addition, there are no restrictions (conditions) on valid combinations of the start symbol and consecutive symbols in the ATDR of NCR-Fwd. Therefore, NCR may not be able to properly forward signals in the ATDR of NCR-Fwd.

[0142] Therefore, the following Proposal 3.1 and Proposal 3.2 are provided to enable the NCR to properly forward signals.

[0143] <Proposal 3.1> When the symbol information in each slot is notified to the NCR, the position of the first symbol of the ATDR of the NCR-Fwd is notified.

[0144] The SLIV (start symbol S and number of consecutive symbols L) of the ATDR of NCR-Fwd is calculated based on the following rules.

[0145] if (L-1)≦7then SLIV = 14(L-1)+S else SLIV = 14(14-L+1)+(14-1-S) Where 0<L≦14-S, S = Start Symbol Index, L = Number of Consecutive Symbols

[0146] That is, the SLIV of the ATDR of NCR-Fwd may use the same rules as the SLIV in the PDSCH and PUSCH of the terminal (see, for example, sec. 5.1.2.1 / sec. 6.1.2.1 in Non-Patent Document 2).

[0147] The reference point of the start symbol S in the ATDR of NCR-Fwd is determined based on options 1 and 2 below.

[0148] <Proposal 3.1 - Option 1> The reference point of the start symbol S in the ATDR of NCR-Fwd shall be the start of the slot. In other words, the reference point of the start symbol S in the ATDR of NCR-Fwd shall be the first symbol of the slot to which the ATDR is assigned. For example, S0=0.

[0149] <Proposal 3.1 - Option 2> The reference point of the start symbol S in the ATDR of NCR-Fwd is the start symbol or the end symbol (last symbol) of the channel (signal) carrying the SCI for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL control. The channel may be, for example, a PDCCH / PDSCH. For example, if the start symbol of the PDCCH (DCI) carrying the SCI is "3", then S0 = 3.

[0150] <Summary of Proposal 3.1> As described above, the start symbol and consecutive number of ATDRs of NCR-Fwd are determined based on a predetermined rule such as SLIV.

[0151] This configuration allows the NCR to determine the start symbol and consecutive number of ATDRs for NCR-Fwd, thereby enabling the signal to be transferred appropriately.

[0152] <Proposal 3.2> NCR uses S and L to set the symbol in the ATDR of NCR-Fwd. The SLIV of the ATDR of NCR-Fwd is calculated based on the rules shown in Proposal 3.1. In Proposal 3.2, NCR determines the following conditions as valid combinations of S and L. In other words, NCR determines that combinations of S and L that satisfy the following conditions are valid combinations of S and L.

[0153] Condition 1: S satisfies "X≦S≦Y".

[0154] Here, X and Y may be predefined values, or a set of candidate values ​​for S may be predefined. Condition 1 may be reused for the tables for PDSCH / PUSCH scheduling in Rel-17 (see, for example, Figures 5 and 6).

[0155] Condition 2: L satisfies "M≦L≦N".

[0156] Here, M and N may be predefined values, or a set of candidate values ​​for L may be predefined. Condition 2 allows the reuse of tables for PDSCH / PUSCH scheduling in Rel-17 (see, for example, Figures 5 and 6).

[0157] Condition 3: S0+S+L satisfies "A≦S0+S+L≦B".

[0158] Here, A and B may be predefined values, or a set of candidate values ​​for "S0+S+L" may be predefined.

[0159] S0 is, for example, the reference point for S described in Proposal 3.1. S0 may be 0. Condition 3 may reuse the restrictions for PDSCH / PUSCH scheduling in Rel-17 (see, for example, Figures 5 and 6). Note that the number of consecutive symbols cannot cross a slot boundary.

[0160] Condition 4: S+L satisfies "J≦S+L≦K".

[0161] Here, J and K may be predefined values. Alternatively, a set of candidate values ​​for "S+L" may be predefined. Condition 4 may be reused for the tables for PDSCH / PUSCH scheduling in Rel-17 (see, for example, Figures 5 and 6).

[0162] <Summary of Proposal 3.2> As explained above, restrictions are placed on the effective combinations of the start symbol and consecutive number of ATDRs in NCR-Fwd.

[0163] This configuration allows the NCR to determine the start symbol and consecutive number of ATDRs for NCR-Fwd, thereby enabling the signal to be transferred appropriately.

[0164] <Study 4.1> In scheduling of PDDCH / PUSCH, repetition of PDDCH / PUSCH is set / indicated.

[0165] 10 is a diagram illustrating the repetition of the PDSCH. When the repetition number is K, the PDSCH is repeated in K consecutive slots.

[0166] For example, when the number of repetitions is "4", the PDSCH is repeated in four consecutive slots with slot numbers "#m", "#m+1", "#m+2", and "#m+3", as shown in Fig. 10. Each repetition in each slot (each hatched portion shown in Fig. 10) has the same start symbol and the same number of symbols.

[0167] There are two types of PUSCH repetition: repetition type A and repetition type B.

[0168] 11 is a diagram illustrating PUSCH repetition type A. In repetition type A, when the number of repetitions is K, the PUSCH is repeated in K consecutive slots.

[0169] For example, when the number of repetitions is "4", as shown in Fig. 11, the PUSCH is repeated in four consecutive slots with slot numbers "#m", "#m+1", "#m+2", and "#m+3". Each repetition in each slot (each hatched portion shown in Fig. 11) has the same start symbol and the same number of symbols. That is, PUSCH repetition type A performs repetitions continuously in slot units.

[0170] 12 is a diagram illustrating PUSCH repetition type B. In repetition type B, the PUSCH is repeated in K*L consecutive symbols when the number of repetitions is K, where L is the number of symbols in each repetition.

[0171] For example, when the repetition number is "4", the PUSCH is repeated four times in 4*L consecutive symbols as shown in Fig. 12. That is, PUSCH repetition type B performs repetition in consecutive symbols.

[0172] In 3GPP, in order to realize coverage extension, repetition is specified for PUSCH / PDSCH, PUCCH, etc., and NCR also needs to operate in accordance with repetition in the ATDR of NCR-Fwd, so the following Proposal 4.1 is provided.

[0173] <Proposal 4.1> NCR sets the ATDR of NCR-Fwd according to the repetition of PUSCH / PDSCH.

[0174] The NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL instructions are applied to the ATDR consisting of K repetitions. In other words, the NCR-Fwd ATDR is applied with K repetitions in K consecutive slots.

[0175] Proposal 4.1 offers the following options 1 and 2:

[0176] <Proposal 4.1 - Option 1> NCR assumes slot-based repetition. K repetitions are performed in K consecutive slots. In other words, repetitions in the ATDR of NCR-Fwd are performed consecutively in slot units.

[0177] Figure 13 is a diagram explaining Proposal 4.1 - Option 1. When the repetition number is K, the ATDR of NCR-Fwd is repeated in K consecutive slots. K is notified to NCR semi-statically / dynamically, for example, using SCI. For example, K is notified to NCR semi-statically / dynamically, using one SCI in slot #n shown in Figure 10.

[0178] For example, when the number of repetitions is "4," as shown in Fig. 13, NCR repeats the ATDR of NCR-Fwd four times in four consecutive slots with slot numbers "#m," "#m+1," "#m+2," and "#m+3." That is, NCR performs repetitions of the ATDR of NCR-Fwd consecutively in slot units. Each repetition in each slot (each hatched portion shown in Fig. 13) has the same start symbol and the same number of symbols.

[0179] The slot of the first repetition may be indicated, for example, in the manner described in proposal 2.1 or proposal 2.2. The S and L of each repetition of each slot may be indicated in the manner described in proposal 3.1 or proposal 3.2.

[0180] <Proposal 4.1 - Option 2> NCR assumes subslot-based repetition. K repetitions are performed over K*L consecutive symbols, where L is the number of symbols in each repetition. In other words, NCR-Fwd ATDR applies K repetitions over K*L consecutive symbols.

[0181] Figure 14 is a diagram explaining Proposal 4.1 - Option 2. The ATDR of NCR-Fwd is repeated in K*L consecutive slots when the repetition number is K. K and L are notified to NCR semi-statically / dynamically using, for example, SCI.

[0182] For example, when the repetition number is "4", as shown in Figure 14, NCR repeats the ATDR of NCR-Fwd four times in 4*L consecutive symbols. That is, NCR performs repetition in the ATDR of NCR-Fwd in consecutive symbols. Each repetition has the same number of symbols.

[0183] The number of symbols L in each repetition may be indicated, for example, in the manner described in proposal 3.1 or proposal 3.2. The first slot of the repetition may be indicated, for example, in the manner described in proposal 2.1 or proposal 2.2. The starting symbol of the repetition may be indicated, for example, in the manner described in proposal 3.1 or proposal 3.2.

[0184] <Summary of Proposal 4.1> As explained above, the NCR performs repetition in the ATDR of the NCR-Fwd based on the information notified using the SCI.

[0185] This configuration allows NCR to achieve coverage extension in the ATDR of NCR-Fwd.

[0186] <Study 4.2> Rel-17 introduced TB processing over multi-slot (TBoMS) to extend the coverage of PUSCH. In TBoMS, one transport block (TB) is transmitted using multiple slots. For example, if the number of slots used to determine the transport block size (TBS) is set / indicated as N, the TB is transmitted over N consecutive slots.

[0187] If repetition is configured / indicated with TBoMS, each repetition consists of N consecutive slots. If the number of repetitions is K, the total number of slots for PUSCH repetition is K*N consecutive slots.

[0188] Figure 15 is a diagram explaining repetition and TBoMS. Figure 15 shows an example where N = 2 and K = 2. For example, one TB is transmitted on the PUSCH in two slots, #m and #m+1 (N = 2). The transmission of the TB is repeated twice, once between #m and #m+1 and once between #m+2 and #m+3 (K = 2).

[0189] When repetition and TBoMS are configured / indicated, the same starting symbol and the same number of symbols are applied to K*N consecutive slots, e.g., each PUSCH in each slot (hatched area in Figure 15) has the same starting symbol and the same number of symbols.

[0190] In 3GPP, TBoMS is specified for PUSCH in order to realize coverage extension, and NCR also needs to operate in accordance with TBoMS in the ATDR of NCR-Fwd, so the following proposal 4.2 is provided.

[0191] <Proposal 4.2> NCR sets the ATDR of NCR-Fwd for K*N consecutive slots, assuming TBoMS of PUSCH.

[0192] The NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL instructions are applied to the ATDR consisting of K repetitions of N consecutive slots. In other words, the NCR-Fwd ATDR applies K repetitions to N consecutive slots.

[0193] The total number of slots in the ATDR of NCR-Fwd is K*N slots. The K*N slots are consecutive, and the same start symbol and the same number of symbols are applied to the consecutive K*N slots.

[0194] 16 is a diagram illustrating Proposal 4.2. When the number of repetitions is K and the number of consecutive slots in TBoMS is N, the ATDR of NCR-Fwd is repeated in N*K consecutive slots.

[0195] Figure 16 shows an example where N = 2 and K = 2. For example, one TB is transmitted in two slots, #m and #m+1 (N = 2). The transmission of the TB is repeated twice, at #m and #m+1 and #m+2 and #m+3 (K = 2). Therefore, the ATDR of NCR-Fwd is allocated to 2 * 2 consecutive slots.

[0196] The slot index of the first slot when repetition and TBoMS are applied to TDRA in NCR-Fwd may be indicated, for example, by the method described in Proposal 2.1 or Proposal 2.2. The start symbol and the number of symbols in each slot when repetition and TBoMS are applied to TDRA in NCR-Fwd may be indicated, for example, by the method described in Proposal 3.1 or Proposal 3.2.

[0197] K is semi-statically / dynamically notified to the NCR using, for example, the SCI. If K is not set / indicated using the SCI, the NCR may determine the value of K to be 1. If K=1 and N≧2, the NCR may interpret that repetition is not applied to the TDRA of NCR-Fwd, and TBoMS is applied.

[0198] N is semi-statically / dynamically notified to the NCR using, for example, the SCI. If N is not set / indicated using the SCI, the NCR may determine the value of N as 1. If K≧2 and N=1, the NCR may interpret that repetition is applied to the TDRA of NCR-Fwd, and TBoMS is not applied.

[0199] K*N may be shown as one parameter.

[0200] <Summary of Proposal 4.2> As described above, the NCR performs repetition and TBoMS in the ATDR of the NCR-Fwd based on the information notified using the SCI.

[0201] This configuration allows the NCR to achieve coverage extension in the ATDR of NCR-Fwd. Note that the NCR may execute TBoMS alone without executing repetition in the ATDR of NCR-Fwd.

[0202] <Study 4.3> In Rel-17, available slot counting was introduced to extend the coverage of PUSCH.

[0203] For example, if at least one symbol in a slot overlaps with a DL symbol, the slot is not used as a slot for PUSCH in repetition / TBoMS.

[0204] Figure 17 is a diagram illustrating the available slot count, showing an example where N=2 and K=2.

[0205] For example, at least one symbol overlaps with a DL symbol in slot #m+1 shown in Fig. 17. In this case, slot #m+1 is not used as a slot for PUSCH in repetition / TBoMS.

[0206] Note that the symbols in slot #m+1 are indicated by the index row of the resource allocation table. The DL symbols are indicated by, for example, the RRC parameters tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated. The DL symbols may be symbols of the SS / PBCH block with an index provided by ssb-PositionsInBurst.

[0207] 3GPP does not specify the available slot count in NCR-Fwd of NCR, so NCR cannot achieve coverage extension in ATDR of NCR-Fwd.

[0208] Therefore, in order for NCR to realize coverage extension in the ATDR of NCR-Fwd, the following proposal 4.3 is provided.

[0209] <Proposal 4.3> The NCR sets the ATDR of the NCR-Fwd for consecutive UL slots, assuming the PUSCH and the available slot count of the PUSCH.

[0210] Assume that the TDRA for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL control is specified as X slots / X symbols. In NCR-Fwd UL operation, if at least one symbol in the specified slot or at least one symbol among the specified symbols overlaps with a DL symbol, the NCR does not count the overlapping slot or symbol in the number of slots or symbols for the NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL ATDR. In other words, the NCR includes the NCR-Fwd ATDR in consecutive UL slots or UL symbols, rather than consecutive slots or symbols.

[0211] Fig. 18 is a diagram illustrating Proposal 4.3. Fig. 18 shows an example where N = 2 and K = 2. K and N are notified to the NCR using, for example, the SCI.

[0212] For example, at least one symbol in slot #m+1 shown in Figure 18 overlaps with a DL symbol. In this case, NCR does not use slot #m+1 as a slot for repetition / TBoMS. For example, as shown by hatching in Figure 18, NCR includes the ATDR of NCR-Fwd in slots "#m+1," "#m+2," "#m+3," and "#m+4."

[0213] The DL symbols may be indicated to the NCR-MT by an RRC parameter such as tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated.

[0214] The DL symbol may be an SSB symbol with an index provided to the NCR-MT by an RRC parameter such as ssb-PositionInBurst.

[0215] The DL symbols may also be symbols of other DL signals / channels of the NCR-MT, such as the PDSCH / PDCCH / CSI-RS of the NCR-MT.

[0216] The DL symbols may be indicated by a new SCI used for TDD (UL / DL) indication for NCR-Fwd operation.

[0217] Although the above description is for UL operation, it also applies to DL operation. For example, in DL operation of NCR-Fwd, if at least one symbol in a designated slot or at least one symbol among the designated symbols overlaps with a UL symbol, the overlapping slot or symbol is not counted in the number of slots or symbols of the NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-DL ATDR. In other words, NCR includes the NCR-Fwd ATDR in consecutive DL slots or DL ​​symbols, not in consecutive slots.

[0218] The UL symbols may be indicated to the NCR-MT by an RRC parameter such as tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated.

[0219] The UL symbols may also be symbols of other UL signals / channels of the NCR-MT, such as PUSCH / PUCCH / SR / PRACH of the NCR-MT.

[0220] The UL symbols may be indicated by a new SCI used for TDD (UL / DL) indication for NCR-Fwd operation.

[0221] The operation of Proposal 4.3 may be enabled by semi-static / dynamic instructions, which may be implemented using the SCI.

[0222] When Proposal 4.3 operation is enabled, K consecutive slots in Proposal 4.1 are replaced with K slots, K UL slots, or K DL slots, and K*L consecutive symbols in Proposal 4.1 are replaced with K*L symbols, K*L UL symbols, or K*L DL symbols.

[0223] When Proposal 4.3 operation is enabled, N consecutive slots in Proposal 4.2 are replaced with N slots, N UL slots, or N DL slots, and K*N consecutive slots in Proposal 4.2 are replaced with K*N slots, K*N UL slots, or K*N DL slots.

[0224] <Summary of Proposal 4.3> As explained above, in UL repetition / TBoMS operation, if a slot or symbol for which an ATDR of NCR-Fwd is set overlaps with a DL symbol, the NCR does not set an ATDR for that slot or symbol. In DL repetition / TBoMS operation, if a slot or symbol for which an ATDR of NCR-Fwd is set overlaps with a UL symbol, the NCR does not set an ATDR for that slot or symbol.

[0225] This configuration allows NCR to properly perform coverage extension in the ATDR of NCR-Fwd.

[0226] <Consideration 5.1> As described above in "PDSCH Time Domain Resource Allocation" and "PUSCH Time Domain Resource Allocation," in the PDSCH / PUSCH scheduling, the TDRA table is configured by higher layer signaling such as RRC. Each row in the TDRA table includes parameters such as a slot index, a start symbol, and the number of symbols. The row index is indicated by the DCI that schedules the PDSCH / PUSCH.

[0227] 3GPP does not specify parameters such as the slot index, start symbol, and number of symbols for the ATDR of NCR-Fwd. Therefore, NCR may not be able to properly forward signals in the ATDR of NCR-Fwd.

[0228] Therefore, the following suggestion 5.1 is provided to enable the NCR to properly forward signals.

[0229] <Proposal 5.1> The NCR is notified of the TDRA table (parameters) for setting the ATDR of NCR-Fwd, such as the start symbol, number of symbols, and repetition, using the SCI. The NCR is instructed to set (allocate) the ATDR of NCR-Fwd using the SCI.

[0230] 19 is a diagram showing an example of a TDRA table. As shown in FIG. 19, the TDRA table for the ATDR of NCR-Fwd has a row index. The TDRA table has a slot index, a start symbol and the number of symbols, a repetition number, and the number of repetition slots, all associated with the row index. The parameters of the TDRA table are notified / configured to the NCR using higher layer signaling such as RRC / MAC CE.

[0231] The TDRA table may include a slot index as described in Proposal 2.1 or Proposal 2.2. The TDRA table may include a start symbol and number of symbols as described in Proposal 3.1 or Proposal 3.2. The TDRA table may include a repetition number as described in Proposal 4.1. The TDRA table may include a slot number for each repetition as described in Proposal 4.2.

[0232] The NCR refers to the TDRA table based on the row index included in the SCI for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL control, and determines the ATDR to which the NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL is assigned. That is, the NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL is applied to the ATDR corresponding to the row index indicated in the SCI. The SCI including the row index for referencing the TDRA table is notified by lower layer signaling such as DCI or higher layer signaling such as RRC / MAC CE.

[0233] Note that the TDRA table may include some of the above parameters, some of which may not be supported, required, or provided (notified / configured).

[0234] The TDRA table may be provided with some of the above parameters. Parameters that are not provided may be directly specified using the SCI. For example, parameters that are not provided may be directly specified using the SCI for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL control. Alternatively, parameters that are not provided may be specified using another SCI different from the SCI for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL control. Alternatively, parameters that are not provided may be predefined, for example, by a specification.

[0235] The parameters of the TDRA table are not limited to the above parameters, and the TDRA table may include other parameters.

[0236] <Summary of Proposal 5.1> As described above, the NCR is provided with a table containing parameters such as the slot index, start symbol, and number of symbols of the ATDR of the NCR-Fwd. The NCR references the table using the notified row index and sets the ATDR of the NCR-Fwd.

[0237] This configuration allows the NCR to properly forward signals in the ATDR of the NCR-Fwd. Furthermore, the NCR references the table using the notified row index to set the ATDR of the NCR-Fwd, reducing the overhead involved in setting the ATDR of the NCR-Fwd.

[0238] <Study 5.2> In B52 (beyond 52 GHz) of Rel-17, multi-PDSCH / multi-PUSCH scheduling was introduced.

[0239] 20 is a diagram illustrating multi-PDSCH / multi-PUSCH. In multi-PDSCH / multi-PUSCH, multiple PDSCH / PUSCH are scheduled by one DCI. For example, as shown in FIG. 20, DCI in slot "#n" schedules PDSCH / PUSCH in multiple slots "#x", "#y", and "#z".

[0240] Each row of the TDRA table has a number of parameters, such as a slot offset, a starting symbol and symbol location, a repetition number, and a mapping type, which are applied to each PDSCH / PUSCH.

[0241] In 3GPP, there are no specifications for technologies such as multi-PDSCH / multi-PUSCH in the ATDR of NCR-Fwd. Therefore, NCR may not be able to forward signals in the ATDR of NCR-Fwd.

[0242] Therefore, the following suggestion 5.2 is provided to enable the NCR to forward signals appropriately.

[0243] <Proposal 5.2> NCR uses one SCI to indicate multiple slots in which the ATDR of NCR-Fwd is set, as well as the start symbol and number of symbols in each of the multiple slots. The SCI is notified by higher layer signaling such as MAC CE or lower layer signaling such as DCI.

[0244] 21 is a diagram illustrating Proposal 5.2. NCR uses one SCI to indicate multiple slots in which the ATDR of NCR-Fwd is set, as well as the start symbol and number of symbols in each of the multiple slots.

[0245] For example, as shown in FIG. 21, the NCR uses one SCI in slot #n to indicate multiple slots "#x", "#y", and "#z" in which the ATDR of the NCR-Fwd is set.

[0246] For example, in slot "#x," the first symbol is designated as the start symbol of the ATDR of NCR-Fwd. Also, in slot "#x," some symbols of slot "#x" are designated as symbols of the ATDR of NCR-Fwd.

[0247] For example, in slot "#y", a symbol in the middle is designated as the start symbol of the ATDR of NCR-Fwd. Also, in slot "#y", some symbols of slot "#y" are designated as symbols of the ATDR of NCR-Fwd.

[0248] For example, in slot "#z," the first symbol is designated as the start symbol of the ATDR of NCR-Fwd. Also, in slot "#z," all symbols of slot "#z" are designated as symbols of the ATDR of NCR-Fwd.

[0249] The TDRA table is used to set the ATDR of NCR-Fwd. For example, the TDRA table is used to set the ATDR in slots "#x", "#y", and "#z" shown in FIG. 21.

[0250] 22 is a diagram showing an example of a TDRA table. As shown in FIG. 22, the TDRA table for ATDR of NCR-Fwd has a row index. The TDRA table has a slot index, a start symbol and the number of symbols, a repetition number, and the number of slots for repetition, which are associated with the row index.

[0251] A plurality of sets of a slot index, a start symbol, a symbol number, a repetition number, and a repetition slot number are associated with one row index. For example, in Fig. 22, four sets are associated with row index "0". The parameters of the TDRA table are notified / configured to the NCR using higher layer signaling such as RRC / MAC CE.

[0252] The TDRA table may include a slot index as described in Proposal 2.1 or Proposal 2.2. The TDRA table may include a start symbol and number of symbols as described in Proposal 3.1 or Proposal 3.2. The TDRA table may include a repetition number as described in Proposal 4.1. The TDRA table may include a slot number for each repetition as described in Proposal 4.2.

[0253] The NCR refers to the TDRA table based on the row index included in the SCI for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL control, and determines the ATDR to which the NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL is assigned. That is, the NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL is applied to the ATDR corresponding to the row index indicated in the SCI. The SCI including the row index for referencing the TDRA table is notified by lower layer signaling such as DCI or higher layer signaling such as RRC / MAC CE.

[0254] As described in Fig. 22, a row index is associated with a plurality of sets of a slot index, a start symbol and the number of symbols, a repetition number, and the number of repetition slots. As a result, a plurality of slots are set in the ATDR of NCR-Fwd based on one SCI including a row index (see Fig. 21).

[0255] It should be noted that the multiple slots associated with one row index may or may not be consecutive.

[0256] The TDRA table may include some of the above parameters, some of which may not be supported, required, or provided (advertised / configured).

[0257] The TDRA table may be provided with some of the above parameters. Parameters that are not provided may be directly specified using the SCI. For example, parameters that are not provided may be directly specified using the SCI for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL control. Alternatively, parameters that are not provided may be specified using another SCI different from the SCI for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL control. Alternatively, parameters that are not provided may be predefined, for example, by a specification.

[0258] The parameters of the TDRA table are not limited to the above parameters, and the TDRA table may include other parameters.

[0259] <Summary of Proposal 5.2> As described above, NCR uses one SCI to specify multiple slots in which the ATDR of NCR-Fwd is set, as well as the start symbol and number of symbols in each of the multiple slots.

[0260] This configuration allows the NCR to allocate the ATDR of the NCR-Fwd to multiple slots and forward signals appropriately.In addition, the NCR references the table using the notified row index to set the ATDR of the NCR-Fwd, reducing the overhead of setting the ATDR of the NCR-Fwd.

[0261] <NCR Capability> The NCR may report the following NCR capabilities to the base station as NCR capability.

[0262] - Whether or not to support NCR access link beam control - Whether or not to support NCR backhaul link beam control using new signaling / new SCI - Whether or not to support NCR ON-OFF control using new signaling / new SCI - Whether or not to support NCR DL-UL (TDD) control using new signaling / new SCI - Whether or not to support the ATDR indication method in Proposal 4.1 / Proposal 4.2 / Proposal 4.3 / Proposal 5.2

[0263] Each of the proposals described above may be applied to NCR if the corresponding capability is supported by NCR and / or enabled by higher layer signaling such as RRC.

[0264] <Other> In the above, multiple (different) types of SCI may be supported for NCR-Fwd beam / NCR-Fwd ON-OFF / NCR-Fwd DL-UL. Different options / Alts may be used for different types of SCI.

[0265] Different options / Alts may be used for the ON and OFF instructions of NCR-Fwd. Different options / Alts may be used for the DL and UL instructions of NCR-Fwd. Different options / Alts may be used for the DL beam and UL beam instructions of NCR-Fwd.

[0266] The ATDR may be set for both or either of the backhaul link and the access link of the NCR-Fwd.

[0267] <Configuration of Repeater> Figure 23 is a block diagram showing an example of the configuration of the repeater 300 according to an embodiment of the present disclosure. The repeater 300 includes, for example, a transmitter 101, a receiver 102, and a controller 103. The repeater 300 communicates wirelessly with, for example, the base station 100 and the terminal 200 (see Figure 1). Note that the transmitter 101 and the receiver 102 may be collectively referred to as a communication unit.

[0268] The transmitting unit 101 transmits to the base station 100 an UL signal addressed to the base station 100 that has been received from the terminal 200. The transmitting unit 101 also transmits to the terminal 200 a DL signal addressed to the terminal 200 that has been received from the base station 100. For example, the transmitting unit 101 transmits the UL signal under the control of the control unit 103.

[0269] The receiving unit 102 receives DL signals transmitted from the base station 100. The receiving unit 102 also receives UL signals transmitted from the terminal 200. For example, the receiving unit 102 receives DL signals and UL signals under the control of the control unit 103. Note that the received signals may include signals addressed to the base station 100, signals addressed to the terminal 200, and signals addressed to the repeater 300.

[0270] The control unit 103 controls the overall (communication) operation of the repeater 300 , including the transmission processing in the transmission unit 101 and the reception processing in the reception unit 102 .

[0271] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 101. Also, the control unit 103 outputs, for example, data and control information received from the receiving unit 102 to the upper layer.

[0272] The control unit 103 performs operations other than the transmission and reception described in the above embodiment (note that these operations may be performed by the transmission unit 101 and / or the reception unit 102).

[0273] 23 illustrates a configuration including one each of the transmitter 101, the receiver 102, and the controller 103, but the present disclosure is not limited to this. For example, as described above, the repeater 300 has two functional entities, an NCR-MT that performs communication on the control link and an NCR-Fwd that performs communication on the access link and the backhaul link. Therefore, the repeater 300 may have a receiver, a transmitter, and a controller corresponding to each of the NCR-MT and the NCR-Fwd. The repeater 300 may also have a receiver, a transmitter, and a controller corresponding to each of the communication on the control link, the access link, and the backhaul link.

[0274] The repeater 300 in the present disclosure may be an example of a communication device. The repeater 300 in the present disclosure may be referred to by other names such as a forwarding device or a relay device. The repeater 300 in the present disclosure may be replaced with a terminal 200 (e.g., a UE). For example, the repeater 300 may be considered as a terminal 200 having a forwarding function (or a relay function).

[0275] The receiver 102 receives the SCI via a control link used for exchanging the SCI between the base station 100 and the repeater 300 .

[0276] Based on the SCI received by the receiving unit 102, the control unit 103 determines the ATDR assigned to the repeater 300 (NCR-Fwd) in the access link / backhaul link used to transfer signals between the base station 100 and the terminal 200.

[0277] The control unit 103 may set the SCS / CP of the ATDR to the SCS / CP of the control link. The control unit 103 may set the SCS / CP of the ATDR to a preset SCS / CP. The control unit 103 may determine the SCS / CP of the ATDR based on the SCI.

[0278] The control unit 103 may determine the slot to which the ATDR is assigned based on slot-related information included in the SCI, which may be an offset from the slot of the received SCI or one or more slot indices.

[0279] The control unit 103 may determine the symbol to which the ATDR is assigned based on information included in the SCI regarding the symbol at which the ATDR starts and information regarding the number of symbols in the ATDR.

[0280] Based on the SCI, the control unit 103 may repeatedly allocate one information block across multiple time resource units (slots or multiple symbols) and / or may allocate one information block across multiple time resource units.

[0281] The receiving unit 101 receives a table regarding the allocation of ATDRs, which includes a row index, a start symbol and number of symbols, a repetition number, and the number of slots used for one repetition, and the control unit 103 may refer to the table based on the row index included in the SCI and determine the ATDR.

[0282] The present disclosure has been described above. Note that the division of items in the above description is not essential to the present disclosure, and items described in two or more items may be used in combination as needed, and items described in one item may be applied to items described in another item (unless they are inconsistent).

[0283] <Hardware Configuration, etc.> The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for 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 directly or indirectly connected (e.g., using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or the multiple devices.

[0284] Functions include, but are not limited to, judgment, determination, assessment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, 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 these functions are implemented.

[0285] For example, the repeater according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 24 is a diagram illustrating an example of a hardware configuration of a repeater 300 according to an embodiment of the present disclosure. The repeater 300 described above may be physically 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.

[0286] In the following description, the term "apparatus" may be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the repeater 300 may be configured to include one or more of the apparatuses shown in the figure, or may be configured to exclude some of the apparatuses.

[0287] Each function in the repeater 300 is realized by loading specified software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and storage 1003.

[0288] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 103 may be realized by the processor 1001.

[0289] 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 programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 103 of the repeater 300 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be used for other functional blocks. While the above-described various processes have been described as being executed by a single processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented on one or more chips. The programs may also be transmitted from a network via a telecommunications line.

[0290] 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 executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0291] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0292] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitter 101 and receiver 102 may be realized by the communication device 1004.

[0293] The input device 1005 is an input device (e.g., 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 (e.g., 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 (e.g., a touch panel).

[0294] Furthermore, 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 between each device.

[0295] The repeater 300 may also 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.

[0296] <Notification of Information, Signaling> Notification of information is not limited to the embodiments described in the present disclosure and may be performed using other methods. For example, notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or a combination thereof. Furthermore, 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.

[0297] <Applicable Systems> The embodiments described in the present disclosure are applicable to LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802.34 (WiMAX (registered trademark The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of LTE and / or LTE-A with 5G).

[0298] <Processing Procedures, etc.> The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be rearranged unless inconsistent. 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.

[0299] <Operation of Base Station> In the present disclosure, specific operations 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.

[0300] <Direction of Input / Output> Information, etc. (see <Information, Signal>) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may also be input / output via multiple network nodes.

[0301] <Handling of Input / Output Information, etc.> Input / output information, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, etc. may be overwritten, updated, or added. Output information, etc. may be deleted. Input information, etc. may be sent to another device.

[0302] <Determination method> The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0303] <Variations of Aspects, etc.> Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation. In addition, 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).

[0304] 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.

[0305] <Software> 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.

[0306] 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.

[0307] 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., which 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.

[0308] Note that terms described 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.

[0309] <System, Network> As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0310] <Parameter and Channel Names> Furthermore, the information, parameters, and the like 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.

[0311] 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.

[0312] <Base Station> 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. A base station may also be referred to by terms such as a macrocell, a small cell, a femtocell, and a picocell.

[0313] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a remote radio head (RRH)). The terms "cell" or "sector" refer to part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0314] Mobile Station In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," and the like may be used interchangeably.

[0315] 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.

[0316] <Base Station / Mobile Station> At least one of the base station and the mobile station may be referred to as 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, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It 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 be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0317] Furthermore, a base station in the present disclosure may be read as a terminal. For example, the embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal may be configured to have the functions of the base station described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0318] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station may be configured to have the functions of the terminal described above.

[0319] Fig. 25 shows an example configuration of a vehicle 2001. As shown in Fig. 25, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0320] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0321] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0322] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0323] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 2012 provides various types of multimedia information and multimedia services to the occupants of the vehicle 2001 by using information acquired from external devices via the communication module 2013, etc.

[0324] The information service unit 12 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0325] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0326] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0327] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0328] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021 to 2029 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021 to 2029, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0329] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)).

[0330] Furthermore, the communication module 2013 stores various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, sensors 2021 to 2029, and the like provided in the vehicle 2001.

[0331] <Meaning and Interpretation of Terms> 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 a table, database, or other data structure), ascertaining something that is considered to be a "judging" or "determining," 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 that are considered to be a "judging" or "determining." 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.

[0332] 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.

[0333] <Reference Signal> A reference signal can also be abbreviated as RS (Reference Signal), and may also be called a pilot depending on the applicable standard.

[0334] <Meaning of "based on"> 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."

[0335] "First," "Second" 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 method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0336] <Means> The "means" in the configuration of each device above may be replaced with "section," "circuit," "device," etc.

[0337] Open Format: When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0338] <Time Units such as TTI, Frequency Units such as RB, and Radio Frame Configuration> 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.

[0339] Numerology may be a communication parameter that applies to the transmission and / or reception of a signal or channel, and 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, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0340] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol). A slot may be a time unit based on numerology.

[0341] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0342] 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.

[0343] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0344] 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. Note that the definition of TTI is not limited to this.

[0345] 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.

[0346] 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.

[0347] 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.

[0348] 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 greater than or equal to 1 ms.

[0349] A resource block (RB) is a resource allocation unit in the time domain and the 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 be determined based on numerology.

[0350] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0351] 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, etc.

[0352] 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.

[0353] 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 BWP and numbered within the BWP.

[0354] 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.

[0355] 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."

[0356] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples, and various changes may be made to the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.

[0357] <Maximum Transmit Power> The "maximum transmit power" in the present disclosure may refer to the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0358] Articles 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.

[0359] <"Different"> In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that 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."

[0360] One aspect of the present disclosure is useful in wireless communication systems having repeaters.

[0361] 10 Wireless communication system 20 NG-RAN 100 Base station (gNB) 200 Terminal (UE) 300 Relay device (NCR) 101 Transmitter 102 Receiver 103 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

Claims

1. a receiving unit for receiving downlink control information; a control unit that determines a slot of a time resource for a signal to be transmitted, based on a slot in which the downlink control information is received, using a slot offset indicated by the downlink control information; A repeater having:

2. the control unit refers to a list in which indexes and slot offsets are associated with each other by using the index included in the downlink control information, and determines the slot offset of the time resource. The repeater of claim 1 .

3. the control unit refers to a list in which an index, a start symbol, and the number of symbols are associated with each other by using the index included in the downlink control information, and determines the start symbol and the number of symbols in the slot of the time resource. The repeater of claim 1 .

4. a control unit that determines a slot offset for determining a slot of a time resource for transmitting a signal based on a slot in which the repeater receives downlink control information; a transmitter that transmits the downlink control information for indicating the slot offset to the repeater; A base station having

5. a control unit that determines a slot offset for determining a slot of a time resource for transmitting a signal based on a slot in which the repeater receives downlink control information; a transmitter that transmits the downlink control information for indicating the slot offset to the repeater; a base station having a receiving unit that receives the downlink control information; a control unit that determines a slot of the time resource based on a slot in which the downlink control information is received, using the slot offset indicated by the downlink control information; a repeater having A wireless system having:

6. The repeater, Receives downlink control information; determining a slot of a time resource for a signal to be transmitted based on a slot in which the downlink control information is received, using a slot offset indicated by the downlink control information; Communication method.