TERMINAL, RADIO COMMUNICATION METHOD AND BASE STATION

Abstract

To properly configure a sequence to be applied to a DMRS and / or a PUCCH in future radiocommunication systems, one aspect of a user terminal of the present invention includes a transmission section that transmits a demodulation reference signal and / or an uplink control channel, and a control section that controls a predetermined sequence to be applied to the demodulation reference signal and / or the uplink control channel, based on at least one symbol index and / or one frequency feature index.

Description

1 / 65 TERMINAL, RADIO COMMUNICATION METHOD AND BASE STATION Technical Field

[001] The present invention relates to a user terminal and a method of radio communication in next-generation mobile communication systems. Fundamentals of the Invention

[002] In the UMTS (Universal Mobile Telecommunications System) network, the Long Term Evolution (LTE) specifications were developed with the aim of further increasing high-speed data rates, providing lower latency, and so forth (see Non-Patent Literature 1). In addition, successor LTE systems are also under study with the aim of achieving additional broadband and increased speed beyond LTE (referred to as, for example, “LTE-A (LTE-Advanced)”, “FRA (Future Radio Access)”, “4G”, “5G”, “5G+ (plus)”, “NR (New RAT (New Radio Access Technology)”, “LTE Rel. 14”, “LTE Rel. 15 (or later versions)” and so forth).

[003] In existing LTE systems (e.g., LTE Rel. 13 or earlier), downlink (DL) and / or uplink (UL) communications are performed using a transmission time interval (TTI) (also referred to as a “subframe” and so on) of 1 ms. This 1 ms TTI is a unit of time for transmitting a channel-encoded data packet, and is a unit of processing in scheduling, link adaptation, retransmission control (HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment)), and so on. The 1 ms TTI includes two slots.

[004] In existing LTE systems, a base radio station demodulates a UL channel (including a UL data channel (e.g., a PUSCH (Channel Petition 870200083801, dated 06 / 07 / 2020, page 10 / 75 2 / 65 Shared Physical Uplink) and / or a UL control channel (e.g., a PUCCH (Physical Uplink Control Channel)), based on the channel estimation results of a demodulation reference signal (DMRS).

[005] In existing LTE systems, a user terminal multiplexes a UL channel and a DMRS and transmits the multiplexed result within the 1 ms TTI. Within the 1 ms TTI, a plurality of DMRSs from different layers of the same user terminal (or from different user terminals) are orthogonally multiplexed through the use of a cyclic offset (CS) and / or orthogonal spreading code (e.g., orthogonal coverage code (OCC)). Citation List Non-Patented Literature

[006] Non-Patent Literature 1: 3GPP TS 36.300 V8. 12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); General Description; Stage 2 (Release 8)” April, 2010. Summary of the Invention Technical Problem

[007] For future radiocommunication systems (e.g., LTE Rel. 14 or Rel. 15, 5G, NR, and so on), the introduction of a TTI (e.g., a TTI shorter than a 1 ms TTI (also referred to as a short TTI, an sTTI, a second TTI, a slot, a mini-slot, and so on)) that has a different time length from the 1 ms TTI (also referred to as a subframe, a first TTI, a slot, and so on) in existing LTE systems is under study.

[008] In existing LTE systems (e.g., LTE Rel. 13 or earlier), the Petition 870200083801, dated 06 / 07 / 2020, p. 11 / 75 3 / 65 Intercellular interference is reduced, causing a base sequence of a DMRS to be skipped to a UL channel (DMRS sequence) per slot within a 1 ms subframe (e.g., sequence group hopping (SGH) (also simply referred to as group hopping), or sequence hopping, and so on).

[009] However, in existing LTE systems, the application of a DMRS sequence hop is controlled on the premise of a 1 ms TTI. On the other hand, in future radio communication systems, DMRS mapping performed using an sTTI unit (e.g., each symbol or each of several symbols), which is shorter than a 1 ms TTI, is under study.

[0010] In future radiocommunication systems, the mapping of a PUCCH (sPUCCH), the application of sequence-based PUCCH (or sequence-based transmission), and so on with the use of one or more symbols are also under study. Therefore, in future radiocommunication systems, how a sequence (or sequence hopping) to be applied to a DMRS and / or a PUCCH is controlled presents a problem.

[0011] The present invention was made in light of such a problem, and has an objective of providing a user terminal and a radiocommunication method that allows the proper configuration of a sequence to be applied to a DMRS and / or a PUCCH in future radiocommunication systems. Solution to the Problem

[0012] One aspect of a user terminal of the present invention includes: a transmission section that transmits a demodulation reference signal and / or an uplink control channel; and a control section that controls a predetermined sequence to be applied to the demodulation reference signal and / or the uplink control channel, based on Petition 870200083801, dated 06 / 07 / 2020, page 12 / 75 4 / 65 at least one symbol index and / or one frequency feature index. Advantageous Effects of the Invention

[0013] According to the present invention, a sequence to be applied to a DMRS and / or PUCCH can be suitably configured in future radiocommunication systems. Brief Description of the Drawings

[0014] FIGS. 1A and 1B are diagrams to show examples of a PUCCH configuration; Figures 2A and 2B are diagrams to show examples of group number indices that correspond to the respective radio features; Figures 3A and 3B are diagrams to show other examples of group number indices that correspond to the respective radio features; Figures 4A and 4B are diagrams to show other examples of group number indices that correspond to the respective radio features; FIG. 5 is a diagram to show an example of CS indices that correspond to the respective radio resources; FIG. 6 is a diagram to show another example of CS indices that correspond to the respective radio resources; FIG. 7 is a diagram to show an example of PUCCH formats to which the present modality is applied; FIG. 8 is a diagram to show an example of a schematic structure of a radiocommunication system according to the present embodiment; FIG. 9 is a diagram to show an example of a general structure of a radio base station according to the present embodiment; FIG. 10 is a diagram to show an example of a functional structure of the radio base station according to the present embodiment; Petition 870200083801, dated 06 / 07 / 2020, page 13 / 75 5 / 65 FIG. 11 is a diagram to show an example of a general structure of a user terminal according to the present embodiment; FIG. 12 is a diagram to show an example of a functional structure of the user terminal according to the present embodiment; and FIG. 13 is a diagram to show an example of a hardware structure of the base radio station and user terminal according to the present embodiment. Description of Modalities

[0015] In existing LTE systems (e.g., LTE Rel. 13 or earlier), two slots are provided within a 1 ms TTI. A DMRS used to demodulate a PUSCH is mapped to one symbol in each slot (two symbols within a 1 ms TTI). As a base sequence of a DMRS (also referred to as a DMRS sequence and so on), for example, a Zadoff-chu (ZC) based sequence is used.

[0016] In existing LTE systems, the number of DMRS sequences is set to 30 or 60, depending on the bandwidth. For example, the number of DMRS sequences is 30 if the bandwidth is equal to or less than five Physical Resource Blocks (PRBs, also referred to as Resource Blocks (RBs), and so on), and is 60 if the bandwidth is equal to or greater than six PRBs.

[0017] In existing LTE systems, if the bandwidth is equal to or less than five PRBs, the 30 DMRS sequences are identified by group numbers (u = 0 to 29) (also referred to as group indices and so on). If the bandwidth is equal to or greater than six PRBs, the 60 DMRS sequences are identified by group numbers (u = 0 to 29) and base sequence numbers (v = 0, 1) (also referred to as sequence indices and so on). Petition 870200083801, dated 06 / 07 / 2020, p. 14 / 75 6 / 65

[0018] If the same DMRS sequences are used between a plurality of user terminals in different cells, the transmission signals from each of the plurality of user terminals interfere with each other. Therefore, to prevent the DMRS sequences from being continuously the same between the plurality of user terminals, the DMRS sequences are skipped at each slot within a 1 ms TTI. For example, in existing LTE systems, two types of hopping schemes (sequential group hopping and sequential hopping) are used.

[0019] In sequential group hopping (SGH, also simply referred to as group hopping), the above group numbers (u) are hopped per slot within a 1 ms TTI. In SGH, the group number (u) of each slot is determined based on a hopping pattern (fgh) and a sequence shift pattern (fss). The hopping pattern and / or sequence shift pattern may be based on a physical cell ID (cell ID) or a virtual cell ID. A user terminal may be informed of a physical cell ID via a sequence number from a synchronization signal (PSS / SSS), and may be informed of a virtual cell ID via RRC signaling. Note that in existing LTE systems, for example, 17 hopping patterns and 30 sequence shift patterns are used.

[0020] In contrast, in a sequence hopping, the above base sequence numbers (v) are skipped per slot within a TTI. The base sequence number (v) of each slot is determined based on a physical cell ID or a virtual cell ID. Sequence hopping is applied when the bandwidth is equal to or greater than six PRBs, and is not used in conjunction with SGH (when SGH is applied, v is set to 0 (v = 0)).

[0021] As described above, in existing LTE systems, to make Petition 870200083801, dated 06 / 07 / 2020, page 15 / 75 7 / 65 random intercellular interference, SGH or sequence hopping can be applied to DMRS sequences.

[0022] Incidentally, for future radiocommunication systems, support for a UL control channel (hereinafter also referred to as a short PUCCH) that has a short duration that is shorter than that of a PUCCH (Physical Uplink Control Channel) format of existing LTE systems (e.g., LTE Rel. 8 to Rel. 13), and / or a UL control channel (hereinafter also referred to as a long PUCCH) that has a long duration that is longer than the short duration are under study.

[0023] The short PUCCH (shortened PUCCH) is mapped to one or more symbols. In the short PUCCH, uplink control information (UCI) and a reference signal (RS) can be time-division multiplexed (TDM), or they can be frequency-division multiplexed (FDM). The RS can be, for example, a demodulation reference signal (DMRS) used to demodulate the UCI.

[0024] As short PUCCH transmission schemes, DMRS-based transmission (or DMRS-based PUCCH) in which a UL signal obtained by TDM / FDM from a DMRS and UCI is transmitted to report the UCI, and sequence-based transmission (or sequence-based PUCCH) in which a UL signal using a code feature associated with a UCI value without the use of a DMRS is transmitted to report the UCI are under study.

[0025] With regard to FIGS. 1A and 1B, DMRS-based transmission and sequence-based transmission will be described.

[0026] FIG. 1A is a diagram to show an example of DMRS-based transmission using two symbols. In this example, a specific bandwidth of the last two symbols within a slot is allocated in a PUCCH. In the PUCCH, a DMRS of a first symbol and a UCI of a second symbol are Petition 870200083801, dated 06 / 07 / 2020, page 16 / 75 8 / 65 multiplexed by TDM.

[0027] FIG. 1B is a diagram to show an example of sequence-based transmission using a symbol. In this example, the same time / frequency resources as those of DMRS-based transmission are allocated to a sequence-based transmission PUCCH. In this case, of the time / frequency resources of DMRS-based transmission, only the first symbol can be used and the second symbol cannot be used.

[0028] For example, the PUCCH of sequence-based transmission can be generated by applying a sequence (e.g., a base sequence) similar to DMRS. In sequence-based transmission, a UL signal is transmitted using code features, each associated with a UCI value. Code features are features that can be used for code division multiplexing (CDM), and can be at least one of a base sequence, a cyclic shift (phase rotation amount), and an OCC (Orthogonal Cover Code).

[0029] In this way, in future radiocommunication systems, it is also assumed that a case will be reached where a PUCCH and / or a DMRS are allocated to each UE per symbol (e.g., per symbol and per PRB). In this case, the allocation of a DMRS and / or a PUCCH to UL per symbol and / or frequency resource is controlled. In contrast, in this case, if a DMRS and / or a PUCCH is generated by applying a sequence considering only one slot unit as in existing LTE systems, intercellular interference and similar interference may be increased.

[0030] Given this, the inventors of the present invention focused on a point where a DMRS and / or a PUCCH is mapped by symbol and / or by frequency feature, and arrived at the idea of ​​controlling a sequence Petition 870200083801, dated 06 / 07 / 2020, p. 17 / 75 9 / 65 predetermined to be applied to a DMRS and / or a PUCCH (for example, determining an index of a predetermined sequence), based on at least one symbol index and / or a frequency feature index, as an aspect of the present invention. It is noted that the frequency feature index can be a feature lock index (PRB) and / or a feature element index (RE). The predetermined sequence can be a base sequence.

[0031] In existing systems, to orthogonalize DMRSs among a plurality of UEs within the same cell, cyclic shift (CS) is applied to predetermined sequences (e.g., base sequences and / or reference signal sequences). The inventors of the present invention focused on a point where a DMRS and / or a PUCCH is mapped by symbol and / or by frequency feature, and arrived at the idea of ​​controlling a CS index to be applied to a predetermined sequence, based on at least one symbol index and / or one frequency feature index, as an aspect of the present invention.

[0032] The present embodiment will be described in detail below. The aspects of the embodiment described below may be applied individually or may be applied in combination. In the present embodiment, a predetermined sequence may be used as at least one of a sequence to be used to generate a PUCCH (e.g., a sequence-based PUCCH and / or a DMRS-based PUCCH), a DMRS sequence for a PUCCH, and a DMRS sequence for a PUSCH. For example, the predetermined sequence may be used as a sequence (e.g., a base sequence) of a predetermined PUCCH format (e.g., PUCCH format 0), a DMRS sequence for a PUCCH, a base sequence of a UCI symbol for a PUCCH, and a DMRS sequence for a PUSCH. As is evident, the predetermined sequence may be applied to Petition 870200083801, dated 06 / 07 / 2020, page 18 / 75 10 / 65 a sequence of other signals and / or channels. The predetermined sequence may be referred to as a base sequence, a reference signal sequence, or a demodulation reference signal sequence.

[0033] In the present embodiment, the jump in predetermined sequences may be the jump of group numbers of predetermined sequences (also referred to as group jump in sequence (SGH), group jump, and so on), and / or jump of base sequence numbers of predetermined sequences (also referred to as sequence jump and so on). The jump of predetermined sequences need only involve the use of different predetermined sequences for each predetermined period (e.g., sTTI), and is not limited to the above SGH and / or sequence jump.

[0034] In the present embodiment, the number of predetermined sequences may be the same as or different from that of existing LTE systems. The predetermined sequence may be identified based on a group number and / or a base sequence number. For example, a UL channel may be a UL data channel (also referred to as sPUSCH, a PUSCH, and so on), and / or a UL control channel (also referred to as sPUCCH, a PUCCH, and so on). In parts of the following description where the generation of a predetermined sequence is not specifically mentioned, the methods (e.g., formulas, and so on) for generating a base sequence (or a DMRS sequence) in existing LTE systems may be applied. (First Aspect)

[0035] With regard to a predetermined sequence to be applied to a PUCCH and / or DMRS, the first aspect describes a jump support configuration based on the symbol level and / or PRB level, as well as the jump at the slot level (e.g., SCG). Petition 870200083801, dated 06 / 07 / 2020, page 19 / 75 11 / 65

[0036] A UE determines an index of a predetermined sequence, using at least one of a symbol index and a frequency feature index. Specifically, the index of a predetermined sequence can be determined by using a formula that includes a symbol index and / or a frequency feature index. The index of a predetermined sequence can be determined based on a group number and a base sequence number (e.g., a formula including a group number and a base sequence number).

[0037] For example, the group number (u) can be defined by a formula that includes a symbol index and / or a frequency feature index (see Formula (1)).

[0038] Formula (1) » = ( / * (.) ++ / ?“(') + / „ )™d30

[0039] Formula (1) is a formula that is used to determine a group number (u) corresponding to slot #ns, a lower frequency feature index (lower PRB and / or RE index) #k to which a PUCCH and / or a PUSCH is mapped, and symbol #1. Here, the group number (u) is defined by using group jump patterns of fghs / ot(ns), fghPRB(k) and fghsimbol° (I), and a sequence shift pattern (fss). Note that a slot index can be a slot index (vertical slot index) that is initialized (ns= 0) at each predetermined period (e.g., 10 ms).

[0040] The group hopping pattern of fghs / ot(ns) includes a slot index, the group hopping pattern of fghPRB(k) includes a frequency feature index (PRB and / or RE), and the group hopping pattern of fghsimbol° (1) includes a symbol index. Note that a formula for the predetermined sequence group number is not limited to Formula (1) above. A formula may not include Petition 870200083801, dated 06 / 07 / 2020, page 20 / 75 12 / 65 a portion of the group jump pattern parameters (e.g., one of fghPRB(k) and fghsymbol(l)). Alternatively, a formula may include another parameter.

[0041] In this way, the group number (u) can be determined based on a jump pattern and a sequence shift pattern. The jump pattern and / or the sequence shift pattern can be based on a physical cell ID (cell ID) or a virtual cell ID. A UE can be informed of a physical cell ID via a sequence number from a synchronization signal (PSS / SSS), and can be informed of a virtual cell ID via RRC signaling.

[0042] By determining the group number (u) (i.e., determining the index of a predetermined sequence) in consideration of a PRB and / or a symbol to which a PUCCH or a DMRS is mapped in the manner described above, the predetermined sequences can be randomized among PRBs and / or among symbols. As a result, even when a PUCCH or a DMRS is mapped by PRB and / or by symbol, intercellular interference can be reduced.

[0043] Enabling and disabling some or all of the group hopping patterns of fghslot(ns), fghPRB(k) and fghsymbol(l) can be configured based on a notification from a base station. As notification from a base station, for example, upper layer signaling (e.g., cell-specific RRC (RRC parameters) signaling, a broadcast signal and / or similar) can be used.

[0044] The following describes a case (Configuration Example 1) where whether all group hopping patterns of fghslot(ns), fghPRB(k) and fghsymbol(l) are applied or not is controlled based on a notification from a base station, and cases (Configuration Examples 2 and 3) where whether a portion of the group hopping patterns are applied or not is controlled based on a Petition 870200083801, dated 06 / 07 / 2020, page 21 / 75 13 / 65 notification from a base station. <Exemplo de Configuração 1>

[0045] Example Configuration 1 illustrates a case where the enabling and disabling of each of the group hopping patterns of fghs / ot(ns), fghPRB(k) and fghsimbol° (I) is controlled based on a notification from a base station. A UE controls whether the hopping patterns at the slot level, symbol level and PRB level are applied or not, based on cell-specific RRC parameters (see Formula (2)).

[0046] Formula (2) )0 if group jump is disabled (yZ,ta-i ,χίίοι *n +2' Ί mod 30se salt0 em8ruP° is enabled Σ_οc\ZPRa*k + i)-2'}mod3Q if group jump is disabled if group jump is enabled '0 f symbol / 1\ _ / symbol xJgh { )~ | Σ,-ο c'XZ5”60'0* / + i) · 2' mod30 if group jump is disabled if group jump is enabled

[0047] Here, Zslot, ZPRB, and zsimbol° can be values ​​defined in advance in a descriptive report (e.g., the scrambling code number), or they can be values ​​reported to an UE from a base station. As an example, Zslot can be 8 (Zslot = 8), ZPRB can be 10 (ZPRB = 10), and zsimbol° can be 12 (zsimbol° = 12). As is evident, the values ​​of Zslot, ZPRB, and zsimbol° are not limited to the values ​​above.

[0048] c(i), c'(i) and c(i) are pseudorandom sequences, and are defined in advance in a descriptive report, using predetermined parameters. Note that, here, the settings (values) of c(i), c'(i) and c(i) to be applied to the respective group jump patterns may be common settings, or they may be different settings. Petition 870200083801, dated 06 / 07 / 2020, page 22 / 75 14 / 65

[0049] The generation of pseudorandom sequences is initialized with Cinic. For example, Cinic is defined by Formula (3) below, and the generation of pseudorandom sequences is initialized (or reset) at each predetermined period (e.g., 10 ms), through the use of Cinic. In this case, the slot index (ns) can also be initialized (ns= 0) at the same timing. Note that the Cinic settings to be applied to the respective group jump patterns can be common settings or different settings. For example, different c(i) can be applied to each of the group jump patterns, and the same cinic can be used for initialization (reset).

[0050] Formula (3)

[0051] In Formula (3), NiDcell is a configurable ID, and a virtual cell ID or a cell ID can be used, for example. Note that the sequence shift pattern (fss) can be determined based on NiDcell. For example, in the predetermined sequence of a PUCCH, the sequence shift pattern can be determined based on a predetermined formula (e.g., fssPUCCH= NiDcellmod30). In the group number, cinic jump patterns + le 30 sequence shift patterns can be used.

[0052] In Formula (2), if each of the group jump patterns of fghs / ot(ns), fghPRB(k) and fghsimbol° (I) is disabled, the values ​​of the jump patterns are 0. On the other hand, if each of the group jump patterns of fghs / ot(ns)zfghPRB(k) and fghsimbol° (I) is enabled, predetermined values ​​are set. In this case, a group number index (predetermined sequence) is determined based on the values ​​of the jump patterns in Petition 870200083801, dated 06 / 07 / 2020, page 23 / 75 15 / 65 groups configured to be enabled.

[0053] FIG. 2A shows an example of group numbers (u) that correspond to the respective radio features when none of the group hopping patterns of fghslot(ns), fghPRB (k) and fghsymbol (l) are applied (fghslot(ns), fghPRB (k), and fghsymbol (l) are disabled). Here, the same group number (here, 9) is applied to each PRB in each symbol in each slot. In this case, the group numbers between slots s, between PRBs and between symbols are the same and, therefore, interference in neighboring cells is more likely to occur.

[0054] FIG. 2B shows an example of group numbers (u) that correspond to the respective radio resources when all group hopping patterns of fghslot(ns), fghPRB(k) and fghsymbol(l) are applied (fghslot(ns), fghPRB(k), and fghsymbol(l) are enabled). In this case, the group numbers are random between slots, between PRBs and between symbols. In this way, the probability of generating interference with neighboring cells can be effectively reduced.

[0055] Note that, for a UE, the configuration (enabling or disabling) of the plurality of group hop patterns of fghslot(ns), fghPRB(k) and fghsymbol(l) can be performed simultaneously, or can be configured separately (independently). When the configuration is performed simultaneously, for example, a base station collectively configures the enabling or disabling of the plurality of group hop patterns of fghslot(ns), fghPRB(k) and fghsymbol(l) for a UE, using one bit. In this case, it is possible to avoid increasing the number of bits required for notification.

[0056] Alternatively, a base station can separately configure the enabling or disabling of the plurality of group hopping patterns of fghslot(ns), fghPRB(k), and fghsymbol(l) for a UE, using different RRC signaling bit fields (or different RRC signaling). In this case, if each of the group hopping patterns of fghslot(ns), fghPRB(k), and fghsymbol(l) is Petition 870200083801, dated 06 / 07 / 2020, page 24 / 75 Whether configured or not, 16 / 65 can be flexibly controlled.

[0057] Note that a combination of predetermined group jump patterns (e.g., fghs / ot(ns) and fghsimbol° (I)) can be configured at the same time, and another group jump pattern (e.g., fghPRB(k)) can be configured independently. The combination of predetermined group jump patterns is not limited to fghs / ot(ns) and fghs'mbol° (I), and can be a combination of fghsimbol° (I) and fghPRB(k), or a combination of fghs / ot(ns) and fghPRB(k). <Exemplo de Configuração 2>

[0058] In Configuration Example 2, the enabling and disabling of predetermined group hopping patterns (e.g., hopping at the time resource level fghs / ot(ns) and fghsymbol°(I)) is controlled based on a notification from a base station. In contrast, a hopping pattern at a frequency resource level (e.g., hopping at the PRB level of fghPRB(k)) is controlled to be applied (or enabled) independently of a notification from a base station (see Formula (4)).

[0059] Formula (4) ( 71^ I ΐΣίοc(Zí / e,*^+ / )-2Jmod30 if group jump is disabled if group jump is enabled c'(Zra*U / )-2' mod 30 fiimWo / jX— / symbol \ V)- c(ZsímWo* / + / )-2' mod30 if group jump is disabled if group jump is enabled

[0060] In Formula (4), if the group jump patterns of fghs / ot(ns) and fghsymbol° (I) are disabled, the values ​​are 0. On the other hand, if the group jump patterns of fghs / ot(ns) and fghsymbol° (I) are enabled, predetermined values ​​will be set. For the group jump pattern Petition 870200083801, dated 06 / 07 / 2020, page 25 / 75 17 / 65 of fghPRB(k), a predetermined value is set independently of a notification from a base station. In other words, a UE determines a group number index (i.e., a predetermined sequence), based on a group hopping pattern configured to be enabled outside of the slot-level and symbol-level group hopping patterns fghslot(ns) and fghsymbol(l), and on a PRB-level group hopping pattern fghPRB(k).

[0061] FIG. 3A shows an example of group numbers (u) that correspond to the respective radio resources when the slot-level and symbol-level group hopping patterns fghslot(ns) and fghsymbol(l) are not applied (fghslot(ns) and fghsymbol(l) are disabled). In this case, the PRB-level group hopping pattern fghPRB(k) is applied and therefore the group numbers (u) are randomized between PRBs. Conversely, the same group number is set between slots if between symbols.

[0062] FIG. 3B shows an example of group numbers (u) that correspond to the respective radio resources when the slot-level and symbol-level group hopping patterns fghslot(ns) and fghsymbol(l) are applied (fghslot(ns) and fghsymbol(l) are enabled). In this case, the group numbers are randomized between slots, between PRBs, and between symbols. In this way, the occurrence of interference with neighboring cells can be effectively reduced.

[0063] By applying the group hopping pattern at the PRB level of fghPRB(k) independently of notification from a base station as described above, randomization of the predetermined sequences can be implemented at least between PRBs. As a result, even when the group hopping pattern(s) at the slot and / or symbol level fghslot(ns) and / or fghsymbol(l) is / are not applied, intercellular interference can be Petition 870200083801, dated 06 / 07 / 2020, page 26 / 75 18 / 65 reduced to a certain degree.

[0064] Note that, for a UE, the configuration (enabling or disabling) of the plurality of group hopping patterns of fghslot(ns) and fghsymbol(l) can be performed simultaneously, or they can be configured separately (independently). If the configuration is performed simultaneously, for example, a base station collectively configures the enabling or disabling of the plurality of group hopping patterns of fghslot(ns) and fghsymbol(l) for a UE, using one bit. In this case, it is possible to avoid increasing the number of bits required for notification.

[0065] Alternatively, a base station can separately configure the enabling or disabling of the plurality of group hopping patterns of fghslot(ns) and fghsymbol(l) for a UE, using different RRC signaling bit fields (or different RRC signaling). In this case, whether each of the group hopping patterns of fghslot(ns) and fghsymbol(l) is configured or not can be flexibly controlled.

[0066] It is observed that Configuration Example 2 illustrates a case where the group hopping pattern at the PRB level fghPRB(k) is applied independently of a notification from a base station, but is not limited to it. For example, the group hopping pattern at the symbol level fghsymbol(l) can be applied independently of a notification from a base station, and whether the group hopping patterns at the slot level and at the PRB level fghslot(ns) and fghPRB(k) are applied or not can be controlled according to a notification from a base station. Alternatively, the group hopping pattern at the slot level fghslot(ns) can be applied independently of a notification from a base station, and the group hopping patterns at the symbol level and at the PRB level fghsymbol(l) and fghPRB(k) are applied or not can be controlled according to a Petition 870200083801, dated 06 / 07 / 2020, p. 27 / 75 19 / 65 notification from a base station.

[0067] Alternatively, the group hopping pattern at the symbol level fghsymbol°(I) may not be applied independently of a base station notification, and the group hopping patterns at the slot level and at the PRB level fghs / ot(ns) and fghPRB(k) are applied or cannot be controlled according to a base station notification. As a result, the same base sequence may be applied to different symbols within the same slot. Therefore, when a PUCCH or a PUSCH of a plurality of symbols is used, the multiplexing capacity of the PUCCH or PUSCH can be increased by applying time-domain OCC between symbols. <Exemplo de Configuração 3>

[0068] In Configuration Example 3, the enabling and disabling of a predetermined group hop pattern (e.g., hop at the fghs / ot(ns) slot) is controlled based on a notification from a base station. In contrast, other group hop patterns (e.g., hop at the symbol level fghsymbol°(I) and hop at the PRB level fghPRB(k)) are controlled to be applied (or enabled) independently of a notification from a base station (see Formula (5)).

[0069] Formula (5) {0 if group jump is disabled c(ZAÍtíi* / <. + í)-2íJmod30 if group jump is enabled = ' ^'“•t + O-SjmodSO z jfrnbtfto x (0 = c(Z*1 + / ) · 2' mod 30

[0070] In Formula (5), if the group jump pattern at slot level of Petition 870200083801, dated 06 / 07 / 2020, page 28 / 75 If 20 / 65 fghslot(ns) is disabled, the value is 0. Conversely, if the group hopping patterns of fghslot(ns) and fghsymbol(l) are enabled, the default values ​​are set. For the group hopping patterns at the symbol level and at the PRB level fghsymbol(l) and fghPRB(k), the default values ​​are set independently of a notification from a base station. In other words, a UE determines a group number index (default sequence) based on the group hopping pattern at the symbol level fghsymbol(l) and the group hopping pattern at the PRB level fghPRB(k).

[0071] FIG. 4A shows an example of group numbers (u) that correspond to the respective radio features when the group hopping pattern at the slot level of fghslot(ns) is not applied (fghslot(ns) is disabled). In this case, the group hopping pattern at the symbol level fghsymbol(l) and the group hopping pattern at the PRB level fghPRB(k) are applied, and therefore the group numbers (u) are random between symbols and between PRBs. On the other hand, the same group number is applied between slots s.

[0072] FIG. 4B shows an example of group numbers (u) that correspond to the respective radio resources when the slot-level group hopping pattern of fghslot(ns) is applied (fghslot(ns) is enabled). In this case, the group numbers are random between slots, between PRBs, and between symbols. In this way, the occurrence of interference with neighboring cells can be effectively reduced.

[0073] By applying the group hopping patterns at the symbol level and at the PRB level fghsymbol(l) and fghPRB(k) independently of a notification from a base station as described above, randomization of the predetermined sequences can be implemented at least between symbols and between PRBs. As a result, even when the hopping pattern in Petition 870200083801, dated 06 / 07 / 2020, page 29 / 75 If the 21 / 65 group at the fghslot(ns) slot level is disabled, intercellular interference can be reduced to some extent.

[0074] It is observed that Configuration Example 3 illustrates a case where the group hop pattern at the symbol level fghsymbol(l) and the group hop pattern at the PRB level fghPRB(k) are applied independently of a notification from a base station, but not limited to that. For example, the group hop pattern at the slot level fghslot(ns) and the group hop pattern at the PRB level fghPRB(k) can be applied independently of a notification from a base station, and whether or not the group hop pattern at the symbol level fghsymbol(l) is applied can be controlled according to a notification from a base station.Alternatively, the group hopping pattern at the fghslot (ns) slot level and the group hopping pattern at the fghsymbol (l) symbol level can be applied independently of a notification from a base station, and whether or not the group hopping pattern at the PRB fghPRB (k) level is applied can be controlled according to a notification from a base station.

[0075] Alternatively, the group hopping pattern at the symbol level fghsymbol(l) cannot be applied independently of a notification from a base station, and whether or not the group hopping pattern at the PRB level fghPRB(k) is applied can be controlled according to a notification from a base station. As a result, the same base sequence can be applied to different symbols within the same slot. Therefore, when a PUCCH or a PUSCH of a plurality of symbols is used, the multiplexing capacity of the PUCCH or PUSCH can be increased by applying time-domain OCC between the symbols. <Variações>

[0076] A configuration (e.g., Formula (1)) is described above in Petition 870200083801, dated 06 / 07 / 2020, p. 30 / 75 22 / 65 The plurality of the group jump patterns of fghs / ot(ns), fghPRB(k) and fghsimbol° (I) is included individually in the group number (u), but is not limited to it. For example, the group number (u) can be defined by using a group jump pattern of fgh (ns) and a sequence shift pattern (fss) (see Formula (6)).

[0077] Formula (6) u = ( / ^)+4)^30

[0078] The fgh (ns) includes at least one or more slot indices (ns), symbol indices (I), and frequency feature indices (PRB and / or RE) (k). The configuration of the fgh (ns) group hopping pattern will be described below, using examples. [Example of fgh (ns) Configuration 1]

[0079] In Configuration Example 1, whether the slot-level hopping pattern, symbol-level hopping pattern, and frequency-level hopping pattern are applied or not are controlled based on a notification from a base station. For example, if the fgh(ns) group hopping pattern is disabled based on a notification from a base station, the value is 0. If the fgh(ns) group hopping pattern is enabled based on a notification from a base station, the value will be set to a predefined value (see Formula (7)).

[0080] Formula (7) θ (cell ... ... \ Σ,ίο ' c(7.celu'° Ν^Ν^η,+Ζ1''10N™ ·Ι + ζ“'υΙ° ·Α + ί)·2'Jmod30 if group jump is disabled if group jump is enabled

[0081] Here, zcell can be a value previously defined in a descriptive report (for example, the scrambling code number), or it can be a value reported to an UE from a base station. As an example, zcell can be 20 (zcell=20). As is evident, the value of zcell Petition 870200083801, dated 06 / 07 / 2020, page 31 / 75 23 / 65 is not limited to the value above. Zcell can be a different value for each group jump or it can be a common value for the group jump.

[0082] NRB corresponds to the number of PRBs and / or REs of a predetermined bandwidth (e.g., a cell bandwidth or a bandwidth configured for a UE) and Nsymbol corresponds to the number of symbols included in a slot or the number of uplink symbols included in a slot. Other parameters (c(i) and similar) may have settings similar to those in Formula (1).

[0083] The predetermined value in the enabling case is determined based on the slot index (ns), the symbol index (l), and the frequency feature index (k). In this case, the group numbers are random between slots, between PRBs, and between symbols. In this way, the probability of generating interference with neighboring cells can be effectively reduced. [Example of fgh (ns) Configuration 2]

[0084] In Configuration Example 2, whether the slot-level hopping pattern and the symbol-level hopping pattern are applied or not are controlled based on a notification from a base station. For example, if the group hopping pattern of fgh(ns) is disabled based on a notification from a base station, the value of fgh(ns) is determined based on the frequency resource index (PRB and / or RE)(k) (see Formula(8)).

[0085] On the other hand, if the fgh(ns) group hopping pattern is enabled based on a notification from a base station, the fgh(ns) value is determined based on the slot index (ns), the symbol index (l), and the frequency resource index (k). Note that the disable case can be expressed by a first configuration value (bit value), and the enable case can be expressed by a second configuration value (value Petition 870200083801, dated 06 / 07 / 2020, page 32 / 75 24 / 65 bit).

[0086] Formula (8) fz cell .... X ** + ί)·2' Imod30 if group jump is disabled Λ»(«.) = ^cell._nul _n +7'u / 0.tv“ . / + / 'u'0.*+ ,·).2'^mod30 if group jump is enabled

[0087] In this case, the group number can be determined by using the frequency resource index (by applying the hopping pattern at the frequency resource level), independently of a notification from a base station. As a result, even when group hopping at the slot level and / or symbol level is not applied, intercellular interference can be reduced to a certain degree.

[0088] Note that Configuration Example 2 illustrates a case where group hopping at the frequency resource level is applied independently of a notification from a base station, but is not limited to that. For example, in Formula (8), the frequency resource index and the symbol index can be interchanged, or the frequency resource index and the slot index can be interchanged.

[0089] Group hopping at the symbol level cannot be applied independently of a notification from a base station. As a result, the same base sequence can be applied to different symbols within the same slot. Therefore, when a PUCCH or a PUSCH of a plurality of symbols is used, the multiplexing capacity of the PUCCH or PUSCH can be increased by applying time-domain OCC between symbols. [Example of fgh (ns) Configuration 3]

[0090] In Configuration Example 3, whether or not the slot-level hopping pattern is applied is controlled based on a notification from a base station. For example, if the group hopping pattern for fgh(ns) is Petition 870200083801, dated 06 / 07 / 2020, page 33 / 75 25 / 65 disabled based on a notification from a base station, the fgh (ns) value is determined based on the frequency feature index (k) and the symbol index (I) (see Formula (9)).

[0091] On the other hand, if the fgh(ns) group hopping pattern is enabled based on a notification from a base station, the fgh(ns) value is determined based on the slot index (ns), the symbol index (I), and the frequency resource index (k). Note that the disable case can be expressed by a first configuration value (bit value), and the enable case can be expressed by a second configuration value (bit value).

[0092] Formula (9) tf cell .... \ c(Zeéua-Nml+ Zcélul° -k+i)·!' jmod30 if group jump is disabled ' Í2^cell~'c(Zcélul°-N^N^-n, +zcélula·ν“·Z+ζ£έωο·*+0·2·)πιοά30 if group jump is enabled

[0093] In this case, the group number can be determined by using the symbol index and the frequency resource index (by applying the hopping pattern at the symbol level and the hopping pattern at the frequency resource level), independently of a notification from a base station. As a result, even when group hopping at the slot level is not applied, intercellular interference can be reduced to a certain degree.

[0094] It is observed that Configuration Example 3 illustrates a case where group hopping at the symbol level and frequency resource level is applied independently of a notification from a base station, but is not restricted to that. For example, in Formula (8), the slot index and frequency resource index can be interchanged, or the slot index and symbol index can be interchanged.

[0095] Group hopping at the symbol level cannot be applied independently of a notification from a base station. As Petition 870200083801, dated 06 / 07 / 2020, page 34 / 75 26 / 65 result, the same base sequence can be applied to different symbols within the same slot. Therefore, when a PUCCH or a PUSCH of a plurality of symbols is used, the multiplexing capacity of the PUCCH or PUSCH can be increased by applying time-domain OCC between the symbols. (Second Aspect)

[0096] With regard to the cyclic shift (CS) to be applied to a predetermined sequence of a PUCCH and / or a DMRS, the second aspect describes a configuration for applying at least one symbol index (CS jump at the symbol level) and / or one frequency feature index (CS jump at the frequency feature level).

[0097] A UE determines that cyclic shifting (CS) is applied to a predetermined sequence, through the use of at least one of a symbol index and a frequency feature index. For example, the CS index is determined based on the jump at the slot level and the symbol level (slot index and symbol index). Alternatively, the CS index may be determined based on the jump at the frequency feature level (PRB and / or RE) (frequency feature index) as well as the jump at the slot level and the symbol level.

[0098] The following describes a case (CS Jump Configuration 1) where CS jumping at slot and symbol levels is performed, and a case (CS Jump Configuration 2) where CS jumping at slot, symbol, and PRB levels is performed, using examples. Note that CS in the second aspect can be applied to a predetermined PUCCH format. For example, for at least one of the PUCCH formats 0, 1, 3, and 4, the cyclic shift described below is applied as a cyclic shift of a base sequence at each symbol. Note that for PUCCH formats 3 and 4, CS can be applied to at least Petition 870200083801, dated 06 / 07 / 2020, p. 35 / 75 27 / 65 minus one DMRS symbol. <Configuração de Salto de CS 1>

[0099] In CS Jump Configuration 1, the CS index jump is performed at the slot level and at the symbol level. For example, a UE determines that a CS index (ct(ns, I)) is to be applied to a predetermined sequence, by using Formula (10) below. Note that Formula (10) is used to determine a CS index that corresponds to slot #nse symbol #1.

[00100] Formula (10) cell . <lula(«s.O = Z,'o , +ZcM°-l+i)-2‘ [<'uta(ws, / ) + n'(Hs)] mod <Ba(ns, / )= 2^--^(^, / ) / ^

[00101] Here, ncscelula(ns, 1) corresponds to a shared CS jump pattern in a cell (e.g., shared in a predetermined UE group). The zcelula can be a value defined in advance in a specification (e.g., the scrambling code number), or it can be a value reported to a UE from a base station. As an example, the Zcelula can be 20 (zcelula= 20). As is evident, the value of zcelula is not limited to the value above. The zcelula can be a different value for each jump in the group or it can be a common value for the jump in the group.

[00102] n'(ns) corresponds to a previously configured value (for example, the initial value of the cyclic offset). For example, n'(ns) can be a value explicitly reported based on a set of PUCCH features configured by a combination of RRC and DCI, a value determined based on a control channel element (CCE) index of a downlink control channel (PDCCH), or a value determined based Petition 870200083801, dated 06 / 07 / 2020, page 36 / 75 28 / 65 in a PRB and / or RE index of a downlink shared channel (PDSCH).

[00103] Nscrb corresponds to the number of subcarriers (or REs) in each PRB and, for example, Nscrbé 12 (Nscrb= 12). NsímbUL corresponds to a UL period (the number of UL symbols) or the number of slots.

[00104] c(i) is a pseudorandom sequence, and is defined in advance in a descriptive report, using a predetermined parameter. The generation of pseudorandom sequences is initialized with cinic. For example, cinic can be determined based on a configurable ID (NIDcell). As NIDcell, a virtual cell ID or a cell ID can be used, and cinic can be equal to NIDcell(cinic = NIDcell). c(i) can be initialized (or reset) at each predetermined period (e.g., 10 ms), through the use of cinic.

[00105] A CS index (e.g., a(ns, l)) actually used by a UE can be determined by the CS index (n'(ns)) configured based on a predetermined method, and the CS jump pattern (nccell(ns, l)) shared in a cell.

[00106] In CS Jump Configuration 1, Formula (10) includes the slot index (ns) and the symbol index (l). Therefore, CS indices are jumped at the slot level and at the symbol level.

[00107] FIG. 5 shows an example of CS indices corresponding to the respective radio resources when CS index hopping is performed at the slot level and at the symbol level. In this case, the CS indices are randomized between slots and between symbols. In this way, the occurrence of interference with neighboring cells can be effectively reduced. <Configuração de Salto de CS 2>

[00108] In the CS 2 jump configuration, the jump of CS indices is Petition 870200083801, dated 06 / 07 / 2020, page 37 / 75 29 / 65 performed at the slot level, symbol level, and frequency feature level (PRB and / or RE). For example, a UE determines a CS index (a(ns, I, k)) to be applied to a predetermined sequence, by using Formula (11) below. Note that Formula (11) is used to determine a CS index corresponding to slot #ns, symbol #1, and a minimum frequency feature index (lowest PRB and / or RE index) #k to which a PUCCH and / or a PUSCH is mapped.

[00109] Formula (11) ___^cell —1 nccilu,° (ns,l,k) = γ._οc(Zcell· Λ'RB- N^b· «s+ Zcellula-N™-1 + Zcellula-k + / )-21na(nj,k)= mod / V™ a(n„l,k)= 2n-na(nt,l,k) / N™

[00110] Here, NRB corresponds to the number of PRBs and / or REs of a predetermined bandwidth (e.g., a cell bandwidth or a bandwidth configured for a UE). Other parameters (zcelle and similar) are similar to those in Formula (10).

[00111] The k that corresponds to a frequency feature index (e.g., PRB index) is added to Formula (11), compared to Formula (10). In other words, in the CS 2 Jump Configuration, Formula (11) includes the slot index (ns), the symbol index (I), and the frequency feature index (k). Therefore, CS indices are skipped at the slot level, symbol level, and frequency feature level.

[00112] FIG. 6 shows an example of CS indices corresponding to the respective radio resources when CS index hopping is performed at the slot level, symbol level, and frequency resource level. In this case, the CS indices are random between slots, between symbols, and between PRBs. Thus, the occurrence of interference with neighboring cells can be effectively... Petition 870200083801, dated 06 / 07 / 2020, page 38 / 75 30 / 65 reduced. <Variações>

[00113] As is the case with sequential hopping (group hopping) illustrated in the first aspect, whether CS hopping is applied or not (enabled or disabled) can also be configured based on a notification from a base station.

[00114] A base station can configure the sequential hop configuration (enabling or disabling) and CS hop configuration for a UE simultaneously, or separately (independently). For example, a base station collectively configures the enabling or disabling of sequential hops and CS hop for a UE, through the use of upper-layer signaling. In this case, it can prevent the number of bits required for notification from increasing.

[00115] Alternatively, a base station can separately configure the enabling or disabling of sequential hopping and CS hopping for a UE, through the use of different higher-layer signaling bit fields (or different higher-layer signaling). In this case, whether sequential hopping and CS hopping are configured or not can be flexibly controlled. <Formato de PUCCH>

[00116] Note that when the present embodiment is applied to a PUCCH, the present embodiment can be applied to a predetermined PUCCH format. An example of PUCCH formats will be described below with reference to FIG. 7. Note that the PUCCH formats to which the present embodiment can be applied are not limited to the configuration described below.

[00117] FIG. 7 shows a plurality of PUCCH formats with various numbers of symbols and / or numbers of UTI bits. Note that the formats Petition 870200083801, dated 06 / 07 / 2020, page 39 / 75 31 / 65 of PUCCH shown in FIG. 7 are merely examples and the contents of PUCCH formats 0 to 4 are not limited to those shown in FIG. 7.

[00118] For example, in FIG. 7, the PUCCH 0 format is a short PUCCH for UCI, including up to 2 bits, and is also referred to as a sequence-based short PUCCH and so on. The short PUCCH propagates UCI including up to 2 bits (e.g., HARQ-ACK and / or SR), using 1 or 2 symbols.

[00119] The PUCCH 1 format is a long PUCCH for UCI, including up to 2 bits. The long PUCCH propagates UCI including up to 2 bits, using 4 to 14 symbols. In the PUCCH 1 format, a plurality of user terminals can be code-division multiplexed (CDM) within the same PRB, through time-domain block spreading using cyclic offset (CS) and / or orthogonal cover code (OCC), for example.

[00120] The PUCCH 2 format is a short PUCCH for UCI, including more than 2 bits. The short PUCCH carries UCI including more than 2 bits, using 1 or 2 symbols.

[00121] The PUCCH 3 format is a long PUCCH for UCI, including more than N bits, and a single user terminal is multiplexed within the same PRB. ON can be a predetermined value (e.g., 2). The long PUCCH carries UCI including more than N bits (or N bits or more), using 4 to 14 symbols. The PUCCH 3 format differs from the PUCCH 4 format described below, in that a plurality of user terminals is not multiplexed within the same PRB. In the PUCCH 3 format, OCC can be applied before DFT spreading.

[00122] The PUCCH 4 format is a long PUCCH for UCI, including more than 2 bits, and a plurality of user terminals can be multiplexed within the same PRB. The long PUCCH carries UCI including more than 2 bits and less than N bits (or up to N bits), using 4 to 14 symbols. In the PUCCH format Petition 870200083801, dated 06 / 07 / 2020, page 40 / 75 32 / 65 4. A plurality of user terminals can be multiplexed by code division within the same PRB, through time-domain block spreading using CS and / or OCC. Alternatively, a plurality of user terminals can be multiplexed using at least one block spreading (frequency domain) before discrete Fourier transform (DFT), frequency division multiplexing (FDM), and comb-type subcarriers. OCC before DFT spreading cannot be applied to the PUCCH 4 format.

[00123] Note that the threshold N for the number of UCI bits only needs to be an integer greater than 3 (or 3 or more). The threshold N can be defined in a descriptive report, or it can be configured by higher-layer signaling (e.g., at least one of the RRC (Radio Resource Control) signals and broadcast information (e.g., MIB (Master Information Block), system information (e.g., SIB (System Information Block), RMSI (Minimum Remaining System Information), and so on)). Alternatively, the threshold N may not be specified.

[00124] The PUCCH 4 format is different from the PUCCH 3 format, so a plurality of user terminals can be multiplexed within the same PRB. Note that the definitions of the PUCCH 3 format and the PUCCH 4 format can be interchanged, or the PUCCH 3 format and the PUCCH 4 format can be defined as the same PUCCH format (e.g., PUCCH 3 format).

[00125] Note that, in FIG. 7, N with different values ​​can be used for the PUCCH 3 format and the PUCCH 4 format. For example, N = 2 can be used in the PUCCH 3 format, and N = 100 can be used in the PUCCH 4 format. (Radio Communication System) Petition 870200083801, dated 06 / 07 / 2020, page 41 / 75 33 / 65

[00126] A radio communication system structure according to an embodiment of the present invention will be described below. In this radio communication system, communication is carried out by means of the use of any of the radio communication methods according to the embodiments of the present invention described above, or a combination thereof.

[00127] FIG. 8 is a diagram to show an example of a schematic structure of a radiocommunication system according to an embodiment of the present invention. A radiocommunication system 1 may adopt carrier aggregation (CA) and / or dual connectivity (DC) to group a plurality of fundamental frequency blocks (component carriers) into one, wherein the system bandwidth in LTE systems (e.g., 20 MHz) constitutes a unit.

[00128] It is noted that radiocommunication system 1 may be referred to as LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), Nova-RAT (Radio Access Technology), or similar, or may be referred to as a system for implementing it.

[00129] The radio communication system 1 includes a base radio station 11 that forms a macrocell C1 with a relatively wide coverage, and base radio stations 12 (12a to 12c) that form small cells C2, which are arranged within the macrocell C1 and are narrower than the macrocell C1. In addition, user terminals 20 are placed in the macrocell C1 and in each small cell C2. The arrangement, number and similarities of each of the cells and user terminals 20 are not limited to those shown in FIG. 8.

[00130] User terminals 20 can connect to the station Petition 870200083801, dated 06 / 07 / 2020, page 42 / 75 34 / 65 radio base 11 as well as radio base stations 12. It is assumed that user terminal 20 uses macro cell C1 and small cells C2 simultaneously, through the use of AC or DC. User terminal 20 can apply AC or DC through the use of a plurality of cells (CCs) (e.g., 5 or fewer CCs, 6 or more CCs).

[00131] Between user terminals 20 and base radio station 11, communication can be carried out using a carrier with a relatively low frequency band (e.g., 2 GHz) and a narrow bandwidth (also referred to as an existing carrier, a legacy carrier, and so on). Meanwhile, between user terminals 20 and base radio stations 12, a carrier with a relatively high frequency band (e.g., 3.5 GHz, 5 GHz, and so on) and a wide bandwidth can be used, or the same carrier used with base radio station 11 can be used. Note that the frequency band structure for use at each base radio station is not limited to these.

[00132] A structure may be employed in which a wired connection (e.g., a CPRI (Common Public Radio Interface) compliant optical fiber, an X2 interface, and so forth) or wireless connection is established between base radio station 11 and base radio stations 12 (or between two base radio stations 12).

[00133] Base radio station 11 and base radio stations 12 are each connected to a higher station device 30, and are connected to a core network 40 through the higher station device 30. Note that the higher station device 30 may be, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and so on, but is not limited to these. In addition, each base radio station 12 may be connected to the station device. Petition 870200083801, dated 06 / 07 / 2020, page 43 / 75 35 / 65 superior 30 via base radio station 11.

[00134] Note that base radio station 11 is a base radio station with relatively wide coverage, and may be referred to as a “macro base station”, a “central node”, an “eNB (eNodeB)”, a “transmit / receive point”, and so forth. In addition, base radio stations 12 are base radio stations with local coverage, and may be referred to as “small base stations”, “micro base stations”, “pico base stations”, “femto base stations”, “HeNBs (Domestic eNodeBs)”, “RRHs (Remote Radio Heads)”, “transmit / receive points”, and so forth. Hereafter, base radio stations 11 and 12 will be collectively referred to as “base radio stations 10”, unless otherwise specified.

[00135] User terminals 20 are terminals to support various communication schemes, such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also stationary communication terminals (fixed stations).

[00136] In radio communication system 1, as radio access schemes, orthogonal frequency division multiple access (OFDMA) is applied in the downlink, and single carrier frequency division multiple access (SC-FDMA) and / or OFDMA is applied in the uplink.

[00137] OFDMA is a multi-carrier communication scheme for achieving communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier. SC-FDMA is a single-carrier communication scheme for mitigating interference between terminals by dividing the system bandwidth into bands formed with one or more contiguous resource blocks per terminal, and allowing a plurality of terminals to use mutually different bands. Note that the schemes Petition 870200083801, dated 06 / 07 / 2020, page 44 / 75 36 / 65 uplink and downlink radio access schemes are not limited to combinations thereof, and other radio access schemes may be used.

[00138] In radio communication system 1, a shared downlink channel (PDSCH (Physical Downlink Shared Channel), which is used by each user terminal 20 on a shared basis, a broadcast channel (PBCH (Physical Broadcast Channel)), L1 / L2 downlink control channels, and so on, are used as downlink channels. User data, higher-layer control information, SIBs (System Information Blocks), and so on are communicated on the PDSCH. In addition, MIBs (Master Information Blocks) are communicated on the PBCH.

[00139] The L1 / L2 downlink control channels include a PDCCH (Physical Downlink Control Channel), an EPDCCH (Enhanced Physical Downlink Control Channel), a PCFICH (Physical Format Control Indicator Channel), a PHICH (Physical Hybrid ARQ Indicator Channel), and so on. Downlink control information (DCI), including PDSCH and / or PUSCH scheduling information, is communicated on the PDCCH, for example.

[00140] Note that scheduling information can be reported in DCIs. For example, DCIs for receiving DL data scheduling can be referred to as a DL assignment, and DCIs for transmitting UL data scheduling can be referred to as a UL grant.

[00141] The number of OFDM symbols to be used for PDCCH is communicated in PCFICH. Transmission confirmation information (e.g., also referred to as retransmission control information, Petition 870200083801, dated 06 / 07 / 2020, page 45 / 75 37 / 65 (a HARQ-ACK, an ACK / NACK, and so on) from a HARQ (Hybrid Automatic Repeat Request) to the PUSCH are communicated on the PHICH. The EPDCCH is frequency division multiplexed with the PDSCH (downlink shared data channel) and used to communicate DCI and so on, like the PDCCH.

[00142] In radio communication system 1, as uplink channels, a shared uplink channel (PUSCH (Physical Uplink Shared Channel)), which is used by each user terminal 20 on a shared basis, an uplink control channel (PUCCH (Physical Uplink Control Channel)), a random access channel (PRACH (Physical Random Access Channel)), and so on are used. User data, higher-layer control information, and so on are communicated on the PUSCH. Downlink radio quality information (CQI (Channel Quality Indicator), transmission confirmation information, escalation request (SR), and so on are communicated on the PUCCH. Through the PRACH, random access preambles to establish connections with cells are communicated.

[00143] In radio communication system 1, as downlink reference signals, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), and so on are communicated. In radio communication system 1, as uplink reference signals, a probing reference signal (SRS), a demodulation reference signal (DMRS), and so on are communicated. Note that the DMRS can be referred to as a user terminal-specific reference signal (User Terminal-Specific Reference Signal). Petition 870200083801, dated 06 / 07 / 2020, page 46 / 75 38 / 65 (EU). The reference signals communicated are not limited to these signals. <Estação rádio base>

[00144] FIG. 9 is a diagram to show an example of a general structure of a base radio station according to an embodiment of the present invention. A base radio station 10 is provided with a plurality of transmit / receive antennas 101, amplification sections 102, transmit / receive sections 103, a baseband signal processing section 104, a call processing section 105 and a communication path interface 106. It is noted that the base radio station 10 can be configured to include one or more transmit / receive antennas 101, one or more amplification sections 102 and one or more transmit / receive sections 103.

[00145] The user data to be transmitted from base radio station 10 to a user terminal 20 on the downlink is entered from the upstation device 30 into the baseband signal processing section 104, via the communication path interface 106.

[00146] In the baseband signal processing section 104, user data undergoes transmission processes, such as a PDCP (Packet Data Convergence Protocol) layer process, splitting and coupling of user data, RLC (Radio Link Control) layer transmission processes, such as RLC (Media Access Control) retransmission control, MAC retransmission control (e.g., a HARQ transmission process), scheduling, transport format selection, channel encoding, an Inverse Fast Fourier Transform (IFFT) process, and a pre-encoding process, and the result is forwarded to each transmit / receive section 103. In addition, downlink control signals also undergo transmission processes, such Petition 870200083801, dated 06 / 07 / 2020, page 47 / 75 39 / 65 as channel encoding and inverse fast Fourier transform, and the result is routed to each transmission / reception section 103.

[00147] The transmission / reception sections 103 convert baseband signals that are pre-coded and output from the baseband signal processing section 104 on a per-antenna basis, to obtain radio frequency bands and transmit the result. The radio frequency signals subjected to frequency conversion in the transmission / reception sections 103 are amplified in the amplification sections 102 and transmitted from the transmission / reception antennas 101. The transmission / reception sections 103 may consist of transmitters / receivers, transmission / reception circuits, or fragments of transmission / reception apparatus, which may be described based on a general understanding of the technical field to which the present invention relates. It is noted that each transmission / reception section 103 may be structured as a transmission / reception section in one entity, or may consist of a transmission section and a reception section.

[00148] However, regarding the uplink signals, the radio frequency signals received at the transmit / receive antennas 101 are amplified in the amplification sections 102. The transmit / receive sections 103 receive the amplified uplink signals from the amplification sections 102. The transmit / receive sections 103 convert the received signals into the baseband signal through frequency conversion and transmit it to the baseband signal processing section 104.

[00149] In the baseband signal processing section 104, the user data included in the incoming uplink signals undergoes a fast Fourier transform (FFT) process, a discrete inverse Fourier transform (IDFT) process, error correction decoding, a MAC retransmission control reception process and Petition 870200083801, dated 06 / 07 / 2020, page 48 / 75 40 / 65 RLC and PDCP layer reception processes, which are forwarded to the higher station device 30 via the communication path interface 106. The call processing section 105 performs call processing (preparing, releasing, and so on) of the communication channels, manages the state of the base radio station 10 and manages radio resources, for example.

[00150] The communication path interface 106 transmits and / or receives signals to and / or from the higher station device 30 through a predetermined interface. In addition, the communication path interface 106 can transmit and / or receive signals (backhaul signaling) with other base radio stations 10 through an inter-base station interface (e.g., a CPRI (Common Public Radio Interface) compliant fiber optic cable and an X2 interface).

[00151] Transmit / Receive Sections 103 receive demodulation reference signals for a UL channel and / or a PUCCH to which a predetermined sequence is applied. Transmit / Receive Sections 103 indicate whether a predetermined group hopping pattern is applied or not (enabled or disabled) by using upper-layer signaling (e.g., cell-specific and / or UE-specific RRC signaling (RRC parameter), a broadcast signal, and so on). Transmit / Receive Sections 103 can indicate whether CS hopping (CS index hopping) is applied or not (enabled or disabled) using upper-layer signaling.

[00152] FIG. 10 is a diagram to show an example of a functional structure of the base radio station according to an embodiment of the present invention. Note that, although this example mainly shows functional blocks belonging to characteristic parts of the Petition 870200083801, dated 06 / 07 / 2020, page 49 / 75 In the current 41 / 65 mode, the base 10 radio station includes other functional blocks that are also necessary for radio communication.

[00153] The baseband signal processing section 104 includes at least one control (scheduler) section 301, a transmission signal generation section 302, a mapping section 303, a received signal processing section 304, and a measurement section 305. Note that these structures need only be included in the baseband radio station 10, and some or all of the structures may not be included in the baseband signal processing section 104.

[00154] The control section (scheduler) 301 controls the entire base radio station 10. The control section 301 may consist of a controller, a control circuit or a control apparatus which may be described based on the general understanding of the technical field to which the present invention relates.

[00155] Control section 301 controls, for example, the signal generation of the transmission signal generation section 302, the signal mapping of the mapping section 303, and so on. Control section 301 controls a signal reception process of the received signal processing section 304, the signal measurement of the measurement section 305, and so on.

[00156] Control section 301 controls the scheduling (e.g., resource allocation) of system information, a downlink data signal (e.g., a signal transmitted on the PDSCH), a downlink control signal (e.g., a signal transmitted on the PDCCH and / or EPDCCH, transmission confirmation information, and so on). Control section 301 controls the generation of a downlink control signal, a downlink data signal, and so on, based on the results that determine whether the retransmission control Petition 870200083801, dated 06 / 07 / 2020, pages 50 / 75 42 / 65 for an uplink data signal is required or not, for example. Control section 301 performs the scheduling control of synchronization signals (e.g., PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)), downlink reference signals (e.g., CRS, CSI-RS, and DMRS), and so on.

[00157] Control section 301 controls the scheduling of an uplink data signal (e.g., a signal transmitted on the PUSCH), an uplink control signal (e.g., a signal transmitted on the PUCCH and / or PUSCH, transmission acknowledgment information, and so on), a random access preamble (e.g., a signal transmitted on the PRACH), an uplink reference signal, and so on.

[00158] Control section 301 controls whether a predetermined group jump pattern is applied or not (enabled or disabled). Control section 301 can control whether CS jumping (CS index jumping) is applied or not (enabled or disabled).

[00159] The transmission signal generation section 302 generates downlink signals (downlink control signals, downlink data signals, downlink reference signals, and so on), based on commands from the control section 301, and transmits the generated downlink signals to the mapping section 303. The transmission signal generation section 302 may consist of a signal generator, a signal generation circuit, or a signal generation apparatus, which may be described based on a general understanding of the technical field to which the present invention relates.

[00160] The transmission signal generation section 302 generates, for example, a DL assignment to notify downlink data assignment information and / or a UL grant to notify information of Petition 870200083801, dated 06 / 07 / 2020, page 51 / 75 43 / 65 uplink data assignment, based on commands from control section 301. Both DL assignment and UL granting are DCI, and follow a DCI format. Downlink data signals are subjected to an encoding process and a modulation process, according to a coding rate, a modulation scheme, and so on that is determined based on channel state information (CSI) from each user terminal 20, for example.

[00161] The mapping section 303 maps the downlink signals generated in the transmission signal generation section 302 to predetermined radio resources, based on commands from the control section 301, and transmits them to the transmission / reception sections 103. The mapping section 303 may consist of a mapper, a mapping circuit, or a mapping apparatus, which may be described based on a general understanding of the technical field to which the present invention relates.

[00162] The received signal processing section 304 performs a receiving process (e.g., demapping, demodulation, decoding, and so on) on the received signals entered from the transmission / reception sections 103. Here, the received signals are, for example, uplink signals transmitted from the user terminal 20 (uplink control signals, uplink data signals, uplink reference signals, and so on). The received signal processing section 304 may consist of a signal processor, a signal processing circuit, or a signal processing apparatus, which may be described based on a general understanding of the technical field to which the present invention relates.

[00163] The received signal processing section 304 transmits decoded information through the reception process to the section of Petition 870200083801, dated 06 / 07 / 2020, page 52 / 75 44 / 65 control 301. For example, when a PUCCH including a HARQ-ACK is received, the HARQ-ACK is sent to control section 301. The received signal processing section 304 sends the received signals and / or the signals after the reception process to measurement section 305.

[00164] Measurement section 305 conducts measurements with respect to received signals. Measurement section 305 may consist of a meter, a measurement circuit, or a measuring apparatus, which may be described based on a general understanding of the technical field to which the present invention relates.

[00165] For example, measurement section 305 can perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, and so on, based on received signals. Measurement section 305 can perform measurements with respect to receive power (e.g., RSRP (Received Reference Signal Power)), receive quality (e.g., RSRQ (Received Reference Signal Quality) and SINR (Signal-to-Noise Ratio)), signal strength (e.g., RSSI (Received Signal Strength Indicator)), channel information (e.g., CSI), and so on. The measurement results can be output to control section 301. <Terminal de Usuário>

[00166] FIG. 11 is a diagram to show an example of a general structure of a user terminal according to an embodiment of the present invention. Each user terminal 20 is provided with a plurality of transmit / receive antennas 201, amplification sections 202, transmit / receive sections 203, a baseband signal processing section 204 and an application section 205. It is noted that the user terminal 20 can be configured to include one or more transmit / receive antennas 201, one or more amplification sections 202 and one or Petition 870200083801, dated 06 / 07 / 2020, page 53 / 75 45 / 65 plus transmission / reception sections 203.

[00167] Radio frequency signals received at the transmit / receive antennas 201 are amplified in the amplification sections 202. The transmit / receive sections 203 receive downlink signals amplified in the amplification sections 202. The transmit / receive sections 203 convert the received signals into baseband signals through frequency conversion and transmit the baseband signals to the baseband signal processing section 204. The transmit / receive sections 203 may consist of transmitters / receivers, transmit / receive circuits, or fragments of transmit / receive apparatus, which may be described based on a general understanding of the technical field to which the present invention relates. It is noted that each transmit / receive section 203 may be structured as a transmit / receive section in one entity, or may consist of a transmit section and a receive section.

[00168] The baseband signal processing section 204 performs, on each incoming baseband signal, an FFT process, error correction decoding, a retransmission control reception process, and so on. Downlink user data is forwarded to application section 205. Application section 205 performs processes related to higher layers above the physical layer and the MAC layer, and so on. Broadcast information, from the downlink data, can also be forwarded to application section 205.

[00169] Meanwhile, uplink user data is inserted from application section 205 to baseband signal processing section 204. Baseband signal processing section 204 performs a retransmission control transmission process (e.g., a Petition 870200083801, dated 06 / 07 / 2020, pp. 54 / 75 46 / 65 HARQ transmission process), channel encoding, pre-encoding, a discrete Fourier transform (DFT) process, an IFFT process, and so on, and the result is forwarded to each transmit / receive section 203. The transmit / receive sections 203 convert the baseband signals emitted from the baseband signal processing section 204 to have radio frequency band and transmit the result. The radio frequency signals subjected to frequency conversion in the transmit / receive sections 203 are amplified in the amplification sections 202 and transmitted from the transmit / receive antennas 201.

[00170] Transmit / Receive Sections 203 transmit demodulation reference signals to a UL channel and / or a PUCCH to which a predetermined sequence is applied. Transmit / Receive Sections 203 receive information related to whether a predetermined group hopping pattern is applied or not (enabled or disabled), through the use of upper-layer signaling (e.g., cell-specific and / or UE-specific RRC signaling (RRC parameter), a broadcast signal, and so on). Transmit / Receive Sections 203 may receive information related to whether CS hopping (CS index hopping) is applied or not (enabled or disabled), through the use of upper-layer signaling.

[00171] FIG. 12 is a diagram to show an example of a functional structure of the user terminal according to an embodiment of the present invention. Note that, although this example mainly shows functional blocks belonging to characteristic parts of the present embodiment, the user terminal 20 includes other functional blocks that are also necessary for radio communication.

[00172] The baseband signal processing section 204 included in the user terminal 20 includes at least one control section 401, a section Petition 870200083801, dated 06 / 07 / 2020, pages 55 / 75 47 / 65 transmission signal generation 402, a mapping section 403, a received signal processing section 404, and a measurement section 405. Note that these structures only need to be included in the user terminal 20, and some or all of the structures may not be included in the baseband signal processing section 204.

[00173] Control section 401 controls the entire user terminal 20. Control section 401 may consist of a controller, a control circuit, or a control device, which may be described based on a general understanding of the technical field to which the present invention relates.

[00174] Control section 401 controls, for example, the signal generation of the transmission signal generation section 402, the signal mapping of the mapping section 403, and so on. Control section 401 controls a signal reception process of the received signal processing section 404, the signal measurement of the measurement section 405, and so on.

[00175] Control section 401 acquires the downlink control signals and downlink data signals transmitted from base radio station 10, via the received signal processing section 404. Control section 401 controls the generation of an uplink control signal and / or an uplink data signal, based on the results that determine whether retransmission control for the downlink control signal and / or the downlink data signal is necessary or not, for example.

[00176] Control section 401 controls a predetermined sequence to be applied to a demodulation reference signal and / or an uplink control channel, based on at least one symbol index and / or frequency feature index. Control section 401 applies at least one of the following: slot-level hopping, symbol-level hopping, and hopping. Petition 870200083801, dated 06 / 07 / 2020, pp. 56 / 75 48 / 65 frequency feature level, for the predetermined sequence.

[00177] For example, control section 401 can control the enabling or disabling of slot-level hopping and symbol-level hopping based on a notification from a base station, and can apply frequency resource-level hopping independently of a notification from a base station. Alternatively, control section 401 can control the enabling or disabling of slot-level hopping based on a notification from a base station, and can apply symbol-level hopping and frequency resource-level hopping independently of a notification from a base station.

[00178] Control section 401 can control the cyclic shift to be applied to a predetermined sequence, based on at least one symbol index and / or one frequency feature index.

[00179] The transmission signal generation section 402 generates uplink signals (uplink control signals, uplink data signals, uplink reference signals, and so on), based on commands from the control section 401, and transmits the generated uplink signals to the mapping section 403. The transmission signal generation section 402 may consist of a signal generator, a signal generation circuit, or a signal generation apparatus, which may be described based on a general understanding of the technical field to which the present invention relates.

[00180] The 402 transmission signal generation section generates, for example, uplink control signals related to transmission confirmation information, channel status information (CSI), and so on, based on commands from the 401 control section. The 402 transmission signal generation section also generates uplink data signals, Petition 870200083801, dated 06 / 07 / 2020, pages 57 / 75 49 / 65 based on a command from control section 401. For example, when downlink control signals reported from base radio station 10 include a UL grant, transmit signal generation section 402 receives a command to generate uplink data signals from control section 401.

[00181] The mapping section 403 maps the uplink signals generated in the transmission signal generation section 402 to radio resources, based on commands from the control section 401, and transmits them to the transmission / reception sections 203. The mapping section 403 may consist of a mapper, a mapping circuit, or a mapping apparatus, which may be described based on a general understanding of the technical field to which the present invention relates.

[00182] The received signal processing section 404 performs a receiving process (e.g., demapping, demodulation, decoding, and so on) on the received signals fed in from the transmission / reception sections 203. Here, the received signals are, for example, downlink signals (downlink control signals, downlink data signals, downlink reference signals, and so on) transmitted from the base radio station 10. The received signal processing section 404 may consist of a signal processor, a signal processing circuit, or a signal processing apparatus, which may be described based on the general understanding of the technical field to which the present invention pertains. Furthermore, the received signal processing section 404 may constitute a receiving section according to the present invention.

[00183] The received signal processing section 404 transmits decoded information through the reception process to the section of Petition 870200083801, dated 06 / 07 / 2020, pages 58 / 75 50 / 65 control 401. The received signal processing section 404 transmits, for example, broadcast information, system information, RRC signaling, DCI and so on to the control section 401. The received signal processing section 404 transmits the received signals and / or the signals after the reception process to the measurement section 405.

[00184] Measurement section 405 conducts measurements in relation to the received signals. Measurement section 405 may consist of a meter, a measurement circuit or a measuring apparatus which may be described based on the general understanding of the technical field to which the present invention relates.

[00185] For example, measurement section 405 can conduct RRM measurement, CSI measurement, and so on, based on the received signals. Measurement section 405 can conduct measurements with respect to received power (e.g., RSRP), reception quality (e.g., RSRQ and SINR), signal strength (e.g., RSSI), channel information (e.g., CSI), and so on. The measurement results can be output to control section 401. <Estrutura de Hardware >

[00186] Note that the block diagrams used to describe the above embodiments show blocks in functional units. These functional blocks (components) can be implemented in arbitrary combinations of hardware and / or software. Furthermore, the method for implementing each functional block is not particularly limited. That is, each functional block can be realized by a fragment of the device that is physically and / or logically aggregated, or it can be realized by directly and / or indirectly connecting two or more physically and / or logically separated device fragments (wired and / or wirelessly, for example) and using this plurality of device fragments.

[00187] For example, a base radio station, a user terminal, and Petition 870200083801, dated 06 / 07 / 2020, pp. 59 / 75 51 / 65 and so on according to an embodiment of the present invention can function as a computer that executes the processes of the radio communication method of the present invention. FIG. 13 is a diagram to show an example of a hardware structure of the base radio station and the user terminal according to an embodiment of the present invention. Physically, the above-described base radio station 10 and the user terminals 20 can each be formed as a computer apparatus that includes a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007, and so on.

[00188] Note that in the following description, the word apparatus can be interpreted as circuit, device, unit, and so on. The hardware structure of the base radio station 10 and the user terminals 20 may be designed to include one or more apparatuses shown in the drawings, or it may be designed to not include some of the apparatuses.

[00189] For example, although only one 1001 processor is shown, a plurality of processors can be provided. Furthermore, processes can be implemented with one processor, or they can be implemented simultaneously, sequentially, or in different ways with one or more processors. Note that the 1001 processor can be implemented with one or more chips.

[00190] Each function of the base radio station 10 and the user terminals 20 is implemented, for example, allowing predetermined software (programs) to be read from the hardware such as the processor 1001 and memory 1002, and allowing the processor 1001 to perform calculations to control communication through the communication device 1004 and to read and / or write data in memory 1002 and storage 1003. Petition 870200083801, dated 06 / 07 / 2020, pages 60 / 75 52 / 65

[00191] Processor 1001 controls the entire computer, for example, by running an operating system. Processor 1001 can be configured with a central processing unit (CPU), which includes interfaces with peripheral devices, control devices, computing devices, a register, and so on. For example, the baseband signal processing section described above 104 (204), the call processing section 105, and so on, can be implemented by processor 1001.

[00192] In addition, processor 1001 reads programs (program codes), software modules, data, and so on from storage 1003 and / or communication device 1004, into memory 1002, and executes various processes accordingly. As for programs, programs are used to enable computers to perform at least some of the operations described above. For example, the control section 401 of each user terminal 20 can be implemented by control programs stored in memory 1002 and operating on processor 1001, and other functional blocks can be implemented in the same way.

[00193] Memory 1002 is a computer-readable recording medium and may consist of, for example, at least one ROM (read-only memory), one EPROM (erasable programmable ROM), one EEPROM (electrically erasable EPROM), one RAM (random access memory), and other suitable storage media. Memory 1002 may be referred to as a register, cache, “main memory (primary storage device),” and so forth. Memory 1002 may store executable programs (program codes), software modules, and / or the like to implement a radio communication method according to an embodiment of the present invention. Petition 870200083801, dated 06 / 07 / 2020, pages 61 / 75 53 / 65

[00194] Storage 1003 is a computer-readable recording medium and may consist of, for example, at least one of a floppy disk, a floppy disk (trademark), a magneto-optical disk (e.g., a compact disc (CD-ROM (Compact Disc ROM) and so on), a digital versatile disk, a Blu-ray disc (trademark), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick and a key drive), a magnetic tape, a database, a server and other suitable storage media. Storage 1003 may be referred to as a secondary storage device.

[00195] The communication device 1004 is a hardware (transmission / reception device) for enabling intercomputer communication via wired and / or wireless networks, and may be referred to as, for example, a “network device”, a “network controller”, a “network card”, a “communication module”, and so forth. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and so forth, in order to perform, for example, frequency division duplexing (FDD) and / or time division duplexing (TDD). For example, the above-described transmission / reception antennas 101 (201), amplifying sections 102 (202), transmission / reception sections 103 (203), communication path interface 106, and so forth, may be implemented by the communication device 1004.

[00196] Input device 1005 is an input device that receives input from outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, and so on). Output device 1006 is an output device that allows sending output outside (e.g., a Petition 870200083801, dated 06 / 07 / 2020, pages 62 / 75 54 / 65 display, a speaker, an LED (Light Emitting Diode) lamp, and so on). Note that the input device 1005 and the output device 1006 can be supplied in an integrated structure (e.g., a touch-sensitive panel).

[00197] Furthermore, these types of devices, including the processor 1001, the memory 1002, among others, are connected by a bus 1007 to communicate information. The bus 1007 can be formed with a single bus, or it can be formed with buses that vary between device fragments.

[00198] Furthermore, the base radio station 10 and the user terminals 20 can be structured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application-Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field-Programmable Gate Array), and so on, and some or all of the functional blocks can be implemented by the hardware. For example, the processor 1001 can be implemented with at least one of these hardware fragments. (Variations)

[00199] Note that the terminology used in this descriptive report and / or in the terminology necessary to understand this descriptive report may be replaced by other terms that convey the same or similar meanings. For example, channels and / or symbols may be replaced by signals (signaling). In addition, signals may be messages. A reference signal may be abbreviated as an RS, and may be referred to as a pilot, a pilot signal, and so on, depending on which standard applies. In addition, a component carrier (CC) may be referred to as a cell, a frequency carrier, a carrier frequency, and Petition 870200083801, dated 06 / 07 / 2020, pp. 63 / 75 55 / 65 and so on.

[00200] Furthermore, a radio frame may consist of one or a plurality of periods (frames) in the time domain. Each one or a plurality of periods (frames) that constitutes a radio frame may be referred to as a subframe. Furthermore, a subframe may consist of one or a plurality of slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) independent of numerology.

[00201] Furthermore, a slot may consist of one or a plurality of symbols in the time domain symbols (Orthogonal Frequency Division Multiplexing), SC-FDMA symbols (Single Carrier Frequency Division Multiple Access), and so on. Additionally, a slot may be a unit of time based on numerology. A slot may include a plurality of mini-slots. Each mini-slot may consist of one or a plurality of symbols in the time domain. A mini-slot may be referred to as a sub-slot.

[00202] A radio frame, a subframe, a slot, a mini-slot, and a symbol all express units of time in signal communication. A radio frame, a subframe, a slot, a mini-slot, and a symbol can each be called by other applicable terms. For example, a subframe may be referred to as a “transmission time interval (TTI)”, a plurality of consecutive subframes may be referred to as a “TTI”, or a slot or a mini-slot may be referred to as a “TTI”. That is, a subframe and / or a TTI may be a subframe (1 ms) in existing LTE, may be a period shorter than 1 ms (e.g., 1 to 13 symbols), or may be a period longer than 1 ms. Note that a unit expressing a TTI may be referred to as a “slot”, a “mini-slot”, and so on instead Petition 870200083801, dated 06 / 07 / 2020, pp. 64 / 75 56 / 65 of a sub-frame.

[00203] Here, a TTI refers to the minimum time-scaling unit in radiocommunication, for example. For instance, in LTE systems, a base radio station scales the allocation of radio resources (such as frequency bandwidth and transmission power that are available to each user terminal) to the user terminal in TTI units. Note that the definition of TTIs is not limited to this.

[00204] TTIs can be transmission time units for channel-encoded data packets (transport blocks), code blocks and / or codewords, or they can be the processing unit in scheduling, link adaptation and so on. Note that when TTIs are given, the time interval (e.g., the number of symbols) to which the transport blocks, code blocks and / or codewords are actually mapped may be shorter than the TTIs.

[00205] Note that, in the case where a slot or a mini-slot is referred to as a TTI, one or more of the TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum scheduling time unit. Furthermore, the number of slots (number of mini-slots) that constitutes the minimum scheduling time unit may be controlled.

[00206] A TTI with a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8 to Rel. 12), a long TTI, a normal subframe, a long subframe, and so on. A TTI that is shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, and so on.

[00207] Note that a long TTI (e.g., a normal TTI, a subframe, and so on) can be interpreted as a TTI with a Petition 870200083801, dated 06 / 07 / 2020, pp. 65 / 75 57 / 65 time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI and so on) can be interpreted as a TTI with a TTI length less than the TTI length of a long TTI and equal to or greater than 1 ms.

[00208] A resource block (RB) is the unit of resource allocation in the time domain and frequency domain, and may include one or a plurality of consecutive subcarriers in the frequency domain. In addition, an RB may include one or a plurality of symbols in the time domain, and may be a slot, a mini-slot, a subframe, or a TTI in length. A TTI and a subframe may each consist of one or a plurality of resource blocks. Note that one or a plurality of RBs may be referred to as a physical resource block (PRB (Physical RB)), a subcarrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, and so on.

[00209] In addition, a feature block can consist of one or a plurality of feature elements (REs). For example, an RE might correspond to a radio feature field of a subcarrier and a symbol.

[00210] Note that the above-described structures of radio frames, subframes, slots, mini-slots, symbols, and so forth are merely examples. For instance, structures such as the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and so forth can be changed in various ways.

[00211] In addition, the information, parameters, and so on Petition 870200083801, dated 06 / 07 / 2020, pages 66 / 75 58 / 65 described in this descriptive report may be represented in absolute values ​​or in relative values ​​in relation to predetermined values, or may be represented in other corresponding information. For example, radio resources may be specified by predetermined indices.

[00212] The names used for parameters and so forth in this descriptive report are not limiting in any respect. For example, since various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), and so forth) and information elements can be identified by any suitable names, the various names assigned to these individual channels and information elements are not limiting.

[00213] The information, signals and / or other elements described in this descriptive report may be represented by the use of any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and so forth, all of which may be referenced through the description contained in this document, may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

[00214] Furthermore, information, signals, and so on can be transmitted from upper layers to lower layers and / or from lower layers to upper layers. Information, signals, and so on can be inserted and / or transmitted through a plurality of network nodes.

[00215] Input and / or output information, signals, and so on can be stored in a specific location (e.g., memory) or can be managed through the use of a table of Petition 870200083801, dated 06 / 07 / 2020, pages 67 / 75 59 / 65 management. The information, signals, and so on to be entered and / or emitted can be overwritten, updated, or appended. The information, signals, and so on that are emitted can be deleted. The information, signals, and so on that are entered can be transmitted to another device.

[00216] The information report is by no means limited to the aspects / modalities described in this descriptive report, and other methods may also be used. For example, the information report may be implemented through the use of physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), higher layer signaling (e.g., RRC (Radio Resource Control) signaling), broadcast information (master information blocks (MIBs), system information blocks (SIBs), and so on), MAC (Media Access Control) signaling, and other signals and / or combinations thereof.

[00217] Note that physical layer signaling can be referred to as “L1 / L2 control information (Layer 1 / Layer 2) (L1 / L2 control signals)”, “L1 control information (L1 control signal)”, and so on. Furthermore, RRC signaling can be referred to as an “RRC message”, and can be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, and so on. Additionally, MAC signaling can be reported using, for example, MAC control elements (MAC CEs).

[00218] Furthermore, the reporting of predetermined information (e.g., reports of “X is valid”) does not necessarily need to be reported explicitly, and may be reported implicitly (e.g., not reporting Petition 870200083801, dated 06 / 07 / 2020, pages 68 / 75 60 / 65 this predetermined information or report another fragment of information).

[00219] Determinations can be made on values ​​represented by a bit (0 or 1), on boolean values ​​representing true or false, or by comparing numeric values ​​(for example, comparison with a predetermined value).

[00220] Software, whether referred to as “software”, “firmware”, “middleware”, “microcode”, or “hardware description language”, or called by other names, should be interpreted 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, execution threads, procedures, functions, and so forth.

[00221] Furthermore, software, commands, information, and so forth can be transmitted and received via communication media. For example, when software is transmitted from a site, server, or other remote sources using wired technologies (coaxial cables, fiber optic cables, twisted-pair cables, digital subscriber lines (DSL), and so forth) and / or wireless technologies (infrared radiation, microwaves, and so forth), these wired and / or wireless technologies are also included in the definition of communication media.

[00222] The terms “system” and “network” used in this document are used interchangeably.

[00223] In this descriptive report, the terms “base station (BS),” “radio base station,” “eNB,” “gNB,” “cell,” “sector,” “cell group,” “carrier,” and “component carrier” may be used interchangeably. A base station may be referred to as a “fixed station,” Petition 870200083801, dated 06 / 07 / 2020, pages 69 / 75 61 / 65 NodeB, “eNodeB (eNB),” “access point,” “transmission point,” “reception point,” “femtocell,” “small cell,” and so on.

[00224] A base station may accommodate one or a plurality of (e.g., three) cells (also referred to as “sectors”). When a base station accommodates a plurality of cells, the entire coverage area of ​​the base station may be partitioned into a plurality of smaller areas, and each smaller area may provide communication services through base station subsystems (e.g., small indoor base stations (RRHs (Remote Radio Heads))). The term “cell” or “sector” refers to part or all of the coverage area of ​​a base station and / or a base station subsystem that provides communication services within this coverage.

[00225] In this descriptive report, the terms “mobile station (MS),” “user terminal,” “user equipment (UE),” and “terminal” may be used interchangeably. A base station may be referred to as a “fixed station,” “NodeB,” “eNodeB (eNB),” “access point,” “transmission point,” “receive point,” “femtocell,” “small cell,” and so forth.

[00226] Depending on a person skilled in the art, a mobile station may be referred to 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”, “portable device”, “user agent”, “mobile client”, “client”, or some other appropriate terms.

[00227] Furthermore, the base radio stations in this descriptive report can be interpreted as user terminals. For example, each aspect / embodiment of the present invention can be applied to a Petition 870200083801, dated 06 / 07 / 2020, pages 70 / 75 62 / 65 configuration in which communication between a base radio station and a user terminal is replaced by communication between a plurality of user terminals (D2D (Device-to-Device)). In this case, the 20 user terminals can have the functions of the 10 base radio stations described above. Furthermore, terms like "uplink" and "downlink" can be interpreted as "lateral". For example, an uplink channel can be interpreted as a lateral channel.

[00228] Similarly, the user terminals in this descriptive report can be interpreted as base radio stations. In this case, base radio stations 10 can have the functions of the user terminals 20 described above.

[00229] The actions described in this descriptive report to be performed by a base station may, in some cases, be performed by higher-level nodes. In a network that includes one or a plurality of network nodes with base stations, it is clear that various operations that are performed to communicate with terminals may be performed by base stations, by one or more network nodes (e.g., MMEs (Mobility Management Entities), by S-GWs (Server Gateways), and so on may be possible, but these are not limiting) in addition to base stations, or combinations thereof.

[00230] The aspects / modalities illustrated in this descriptive report can be used individually or in combinations, which can be switched depending on the implementation mode. The order of processes, sequences, flowcharts, and so on that have been used to describe the aspects / modalities in this document can be reordered as long as no inconsistencies arise. For example, although several methods have been illustrated in this descriptive report with various step components in exemplary orders, the specific orders that are illustrated in this document are by no means limiting. Petition 870200083801, dated 06 / 07 / 2020, pp. 71 / 75 63 / 65

[00231] The aspects / modalities illustrated in this descriptive report can be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New Radio Access), FX (Future Generation Radio Access), GSM (registered trademark) (Global System for Mobile Communications), CDMA 2000, UMB (Ultra-Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (trademark) registered systems), systems that use other suitable methods of radiocommunication and / or state-of-the-art systems that are enhanced based on these.

[00232] The term “based on” (or “based upon”) as used in this descriptive report does not mean “based only on” (or “only based upon”), unless otherwise specified. In other words, the term “based on” (or “based upon”) means both “based only on” and “based at least on” (only based on” and “at least based upon”).

[00233] Reference to elements with designations such as “first,” “second,” and so forth, as used herein, generally does not limit the quantity or order of those elements. These designations may be used in this document only for convenience, as a method of distinguishing between two or more elements. Thus, reference to the first and second elements does not imply that only two elements may be used, or that the first element must precede the second element in any way.

[00234] The term "judge (determine)" as used in this document can encompass a wide variety of actions. For example, "judge (determine)" can be interpreted to mean "make judgments (determinations)." Petition 870200083801, dated 06 / 07 / 2020, pages 72 / 75 64 / 65 regarding calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or some other data structures), ascertaining, and so on. Furthermore, “judging (determining)” can be interpreted to mean making “judgments (determinations)” about receiving (e.g., receiving information), transmitting (e.g., transmitting information), inserting, emitting, accessing (e.g., accessing data in a memory), and so on. Additionally, “judging (determining)” as used in this document can be interpreted to mean making “judgments (determinations)” about resolving, selecting, choosing, establishing, comparing, and so on. In other words, “judging (determining)” can be interpreted to mean making “judgments (determinations)” about some action.

[00235] The terms “connected” and “coupled,” or any variation of these terms used in this document, mean all direct or indirect connections or couplings 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 the elements may be physical, logical, or a combination thereof. For example, “connection” may be interpreted as “access.”

[00236] In this descriptive report, when two elements are connected, the two elements may be considered “connected” or “coupled” to each other through the use of one or more electrical wires, cables and / or printed electrical connections, and, as some non-limiting and non-inclusive examples, through the use of electromagnetic energy with wavelengths in radio frequency regions, microwave regions, optical regions (both visible and invisible), or the like.

[00237] In this descriptive report, the term “A and B are different” may Petition 870200083801, dated 06 / 07 / 2020, pp. 73 / 75 65 / 65 means that "A and B are different from each other." The separate terms, "being coupled," and so on can be interpreted in the same way.

[00238] When terms such as “including,” “comprising,” and variations thereof are used in this descriptive report or in the claims, these terms are intended to be inclusive, similarly to how the term “provide” is used. Furthermore, the term “or” as used in this descriptive report or in the claims is not intended to be an exclusive disjunction.

[00239] Now, although the present invention has been described in detail above, it should be obvious to a person skilled in the art that the present invention is in no way limited to the embodiments described in this document. The present invention can be implemented with various corrections and in various modifications, without departing from the spirit and scope of the present invention as defined by the recitations of the claims. Consequently, the description provided in this document is provided only for the purpose of explaining examples, and should in no way be interpreted as limiting the present invention in any way. Petition 870200083801, dated 06 / 07 / 2020, pp. 74 / 75

Claims

1 / 2 CLAIMS 1. Terminal (20) characterized in that it comprises: a receiving section (203) configured to receive an upper-layer parameter indicating whether group hopping should be enabled or disabled; a control section (401) configured to determine, in a case where group hopping is enabled, a group number of a sequence for a demodulation reference signal for a shared uplink channel based on a symbol index and a slot index; and a transmitting section (203) configured to transmit the demodulation reference signal, wherein the control section (401) is configured to determine the group number based on a pseudorandom sequence c(N+i), and wherein the variable N of the pseudorandom sequence c(N+i) is based on the symbol index and the slot index.

2. A radio communication method characterized in that it comprises: receiving an upper-layer parameter indicating whether group hopping should be enabled or disabled; determining, in a case where group hopping is enabled, a group number of a sequence for a demodulation reference signal for a shared uplink channel based on a symbol index and a slot index; and transmitting the demodulation reference signal, wherein the group number is determined based on a pseudorandom sequence c(N+i), and Petition 870240108275, dated 12 / 18 / 2024, page 12 / 13 2 / 2 wherein the variable N of the pseudorandom sequence c(N+i) is based on the symbol index and the slot index.

3. Base station (10) characterized in that it comprises: a transmitter (103) configured to transmit an upper-layer parameter indicating whether group hopping should be enabled or disabled; and a processor (103) configured to receive a demodulation reference signal for a shared uplink channel, a group number of a sequence for the demodulation reference signal being determined based on a symbol index and a slot index in a case where group hopping is enabled, wherein the group number is determined based on a pseudo-random sequence c(N+i), and wherein the variable N of the pseudo-random sequence c(N+i) is based on the symbol index and the slot index. Petition 870240108275, dated 12 / 18 / 2024, page 13 / 13

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