WO2019038832A1 - User equipment and wireless communication method - Google Patents

Abstract

A user equipment according to an aspect of the present disclosure is characterized by comprising: a control unit that performs a control of mapping upstream control information onto some consecutive subcarriers in one resource block; and a transmission unit that transmits the mapped upstream control information. According to the aspect of the present disclosure, even if the PUCCHs of a plurality of UEs share the same resource block, degradation of reception quality can be suppressed.

Description

User terminal and wireless communication method

The present disclosure relates to a user terminal and a wireless communication method in a next-generation mobile communication system.

In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) has been specified for the purpose of further high data rates, low delays, etc. (Non-Patent Document 1). In addition, LTE-A (LTE Advanced, LTE Rel. 10, 11, 12, 13) has been specified for the purpose of further increasing the capacity and upgrading the LTE (LTE Rel. 8, 9).

LTE successor system (for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Also referred to as Rel. 14 or 15).

In an existing LTE system (for example, LTE Rel. 8-13), downlink (DL: Downlink) and / or uplink using a subframe of 1 ms (also referred to as transmission time interval (TTI) etc.) Communication of the link (UL: Uplink) is performed. The subframe is a transmission time unit of one channel-coded data packet, and is a processing unit such as scheduling, link adaptation, and retransmission control (HARQ: Hybrid Automatic Repeat reQuest).

Further, in the existing LTE system, the user terminal (UE: User Equipment) is configured to use an uplink control channel (for example, PUCCH (Physical Uplink Control Channel)) and / or an uplink data channel (for example, PUSCH (Physical Uplink Shared Channel)). Uplink control information (UCI) is transmitted using this. The configuration (format) of the uplink control channel is also called PUCCH format or the like.

In NR, PUCCH (PUCCH of a different format) different from PUCCH specified in the existing LTE system (for example, LTE Rel. 8-13) is considered.

For example, a PUCCH configuration for mapping modulation symbols on a subcarrier-by-subcarrier basis has been considered to correspond to a large capacity payload. Also, it is considered that PUCCHs of multiple UEs share the same resource block.

On the other hand, the UL signal received at the receiving side (base station) may be deviated from the original subcarrier position due to the influence of the Doppler effect (Doppler shift) due to the movement of the UE, the phase noise of the oscillator, and the like.

Depending on the PUCCH resource mapping method, inter-UE interference occurs due to the influence of this deviation. In this case, the PUCCH reception quality may be degraded and the communication throughput may be reduced.

Thus, the present disclosure has an object to provide a user terminal and a wireless communication method capable of suppressing degradation in reception quality even when PUCCHs of a plurality of UEs share the same resource block.

A user terminal according to an aspect of the present disclosure includes: a control unit that performs control to map uplink control information to a part of continuous subcarriers in one resource block; and a transmission unit that transmits the mapped uplink control information. It is characterized by having.

According to an aspect of the present disclosure, degradation of reception quality can be suppressed even when PUCCHs of multiple UEs share the same resource block.

1A and 1B are diagrams showing an example of PUCCH resource mapping of multiple UEs. FIG. 2 is a diagram illustrating an example of a received signal in which PUCCH interference occurs. FIG. 3A is a diagram illustrating an example of PUCCH resource mapping in an embodiment, and FIG. 3B is a diagram illustrating an example of a received signal when subcarrier positions of the transmission signal in FIG. 3A are shifted. FIG. 4 is a diagram illustrating another example of PUCCH resource mapping in one embodiment. FIG. 5 is a diagram showing an example of PUCCH resource mapping in the modification. FIG. 6 is a diagram showing another example of PUCCH resource mapping in the modification. FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 8 is a diagram showing an example of the entire configuration of a wireless base station according to an embodiment. FIG. 9 is a diagram showing an example of a functional configuration of a wireless base station according to an embodiment. FIG. 10 is a diagram showing an example of the entire configuration of a user terminal according to an embodiment. FIG. 11 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment. FIG. 12 is a diagram illustrating an example of a hardware configuration of a wireless base station and a user terminal according to an embodiment.

In NR, PUCCH (PUCCH of a different format) different from PUCCH specified in the existing LTE system (for example, LTE Rel. 8-13) is considered.

UL control channel (hereinafter also referred to as short PUCCH) having a short duration shorter than the PUCCH (Physical Uplink Control Channel) format of the existing LTE system (for example, LTE Rel. 8-13) and / or the short It is considered to support a UL control channel (hereinafter, also referred to as a long PUCCH) longer than a period.

A short PUCCH (short PUCCH) has a predetermined number of symbols (eg, 1, 2 or 3 symbols) in a certain subcarrier spacing (SCS: Sub-Carrier Spacing).

In short PUCCH, uplink control information (UCI) and reference signal (RS) may be time division multiplexed (TDM) or frequency division multiplexed (FDM) ) May be. RS may be, for example, a demodulation reference signal (DMRS: DeModulation Reference Signal) used for demodulation of UCI.

In addition, UCI includes scheduling request (SR: Scheduling Request), retransmission control information (Hybrid Automatic Repeat reQuest-Acknowledge) (HARQ-ACK (Hybrid-ACK), and ACK / NACK (DL-data channel (PDSCH: Physical Downlink Shared Channel)) (Also referred to as negative ACK), etc., may include at least one of channel state information (CSI) and other information.

The SCS of each symbol of the short PUCCH may be the same as or higher than the SCS of a symbol for a data channel (hereinafter, also referred to as a data symbol). The data channel may be, for example, a Physical Downlink Shared Channel (PDSCH), a Physical Uplink Shared Channel (PUSCH), or the like.

The short PUCCH may be referred to as a higher (large, wide) SCS (eg, 60 kHz) PUCCH. A time unit in which one short PUCCH is transmitted may be called a short TTI.

In short PUCCH, a multicarrier waveform (for example, a waveform based on cyclic prefix OFDM (CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing) may be used, or a single carrier waveform (for example, DFT-spread OFDM (DFT- S-OFDM: Discrete Fourier Transform (Orthogonal Frequency Division Multiplexing) -based waveform) may be used.

The waveform may be called a transmission method, a multiplexing method, a modulation method, an access method, a waveform method, or the like. Also, the waveform may be characterized by applying or not applying DFT precoding (spreading) to the OFDM waveform. For example, CP-OFDM may be referred to as a waveform (signal) to which DFT precoding is not applied, and DFT-S-OFDM may be referred to as a waveform (signal) to which DFT precoding is applied. Also, "waveform" may be read as "waveform signal", "signal according to waveform", "waveform of signal", "signal" or the like.

On the other hand, long PUCCHs are arranged across symbols in a slot to improve coverage and / or transmit more UCI than short PUCCHs. For example, a long PUCCH may be configured using 7 symbols or 14 symbols.

In the long PUCCH, UCI and RS (for example, DMRS) may be TDM or FDM. In the long PUCCH, frequency hopping may be applied for each predetermined period (for example, mini (sub) slot) in the slot. When intra-slot frequency hopping is applied, one or two symbols of DMRS are preferably mapped to one hop.

A long PUCCH may be referred to as a lower (smaller, narrower) SCS (eg, 15 kHz) PUCCH. A time unit in which one long PUCCH is transmitted may be called a long TTI.

The long PUCCH may be configured with the same number of frequency resources as the short PUCCH, or to obtain a power amplification effect, the number of frequency resources (for example, one or two physical resource blocks (PRB: Physical) may be smaller than that of the short PUCCH. (Resource Block)). Also, the long PUCCH may be arranged in the same slot as the short PUCCH.

In long PUCCH, a single carrier waveform (eg, DFT-S-OFDM waveform) may be used, or a multi-carrier waveform (eg, CP-OFDM waveform) may be used.

By the way, regarding long PUCCH, in order to correspond to a large-capacity payload, mapping of a modulation symbol for every subcarrier is examined. The UCI bits may be encoded, scrambled, modulated, DFT precoded and mapped to symbols for UCI. The order of processing is not limited to this.

For example, in a 14-symbol long PUCCH, it is assumed that 2 symbols are used for DMRS and the remaining 12 symbols are used for UCI transmission. Also, PUCCH resource is 1 PRB.

In this case, 12 (symbols) × 12 (subcarriers) = 144 symbols (DFT-S-OFDM symbols, CP-OFDM symbols, etc.) can be used for UCI. A QPSK (Quadrature Phase Shift Keying) modulation signal may be mapped to each symbol. Note that the signal to be mapped is not limited to the QPSK modulation signal.

Also, it is considered that PUCCHs of multiple UEs share the same PRB. For example, it is considered to multiplex PUCCHs of multiple UEs in one PRB. It is considered to use FDM and / or Code Division Multiplexing (CDM) for this multiplexing.

1A and 1B are diagrams showing an example of PUCCH resource mapping of multiple UEs. FIG. 1A shows an example in which 2 UEs (UE1 to UE2) are FDM in 1 PRB, and FIG. 1B shows an example in which 4 UEs (UE1 to UE4) are FDM in 1 PRB.

When multiple UEs are FDM in one PRB, as shown in FIGS. 1A and 1B, it is proposed that the resources of each UE be mapped to subcarriers in a comb shape. For example, the resource of UE1 is mapped every two subcarriers in FIG. 1A and every four subcarriers in FIG. 1B.

The UE may be notified of information on PUCCH (UCI) frequency resources from the base station. The information may include, for example, information on a PRB index, a starting subcarrier index in a PRB, a subcarrier period, and the like.

The information on the frequency resource may be notified from the base station to the UE by higher layer signaling, physical layer signaling (for example, downlink control information (DCI)), or a combination thereof.

For upper layer signaling, for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling (for example, MAC control element (MAC CE (Control Element)), etc. may be used.

However, PUCCH interference between UEs may occur when mapping resources of multiple UEs into a subcarrier shape of a comb.

FIG. 2 is a diagram illustrating an example of a received signal in which PUCCH interference occurs. This example shows an example in which 2 UEs (UE1 to UE2) are FDM in 1 PRB, as in FIG. 1A. In this example, the UCI of UE1 is mapped to the subcarrier corresponding to the even subcarrier index and transmitted, but the subcarrier position to which the UCI of UE2 is mapped is deviated by about one subcarrier from the original subcarrier position. It overlaps with (subcarriers corresponding to odd subcarrier indexes).

As described above, a signal received at the reception side (base station) may be deviated from the original subcarrier position under the influence of the Doppler effect (Doppler shift) due to the movement of the UE, the phase noise of the oscillator, and the like. When UCI resources of multiple UEs are subcarrier mapped in a comb shape, all UCI resources in a PRB are affected by this deviation. When inter-UE interference occurs, reception quality may be degraded and communication throughput may be reduced.

Therefore, the present inventors have conceived of a UCI mapping method capable of suppressing the influence of interference even when UCI modulation signals are observed on the receiving side in a shifted manner.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to the embodiments may be applied alone or in combination.

Although an example in which one PRB is configured by 12 subcarriers will be shown below, the number of subcarriers constituting the PRB is not limited to this. Further, the configuration of each embodiment may be applied also when the UE performs PUCCH transmission using a plurality of PRBs.

(Wireless communication method)
In one embodiment, the UCI resources of a given UE in one PRB are mapped to consecutive subcarriers rather than comb teeth (discontinuous subcarriers). A resource that a predetermined UE in one PRB does not use for UCI mapping may be used for UCI mapping of another UE. That is, UCI resources of each UE are mapped together.

In other words, the subcarrier to which a predetermined UE maps UCI in one PRB is controlled such that at least one of the adjacent subcarriers is not a subcarrier to which another UE maps UCI.

FIG. 3A is a diagram illustrating an example of PUCCH resource mapping in an embodiment, and FIG. 3B is a diagram illustrating an example of a received signal when subcarrier positions of the transmission signal in FIG. 3A are shifted.

FIG. 3A shows an example in which 2 UEs (UE1-UE2) are FDM in one PRB as in FIG. 1A. In FIG. 3A, the resources of UE1 are mapped to subcarriers # 0 to # 5, and the resources of UE2 are mapped to subcarriers # 6 to # 11.

Even when the UCI of UE 1 deviates from the original subcarrier position by about one subcarrier, as shown in FIG. 3B, the occurrence of interference is only subcarrier # 6. Compared to the case where interference occurs in all UCI resources (FIG. 2), the influence of the interference can be largely suppressed.

FIG. 4 is a diagram illustrating another example of PUCCH resource mapping in one embodiment. FIG. 4 shows an example in which 4 UEs (UE 1 to UE 4) are FDM in 1 PRB as in FIG. 1B. In this example, the resources of the UEs 1-4 are mapped to subcarriers # 0 to # 2, # 3 to # 5, # 6 to # 8 and # 9 to # 11, respectively. Also in the case of FIG. 4, as in the example shown in FIGS. 3A and 3B, even if there is a Doppler shift, interference between UEs can be suppressed.

The UE may be notified of information on PUCCH (UCI) frequency resources from the base station. The information may include, for example, information on PRB index, starting subcarrier index in PRB, number of subcarriers in PRB, number of multiplexed UEs, and the like. The UE may determine UCI resources in one PRB based on the notified information.

The information on the frequency resource may be notified from the base station to the UE by higher layer signaling (eg, RRC signaling, broadcast information), physical layer signaling (eg, DCI), or a combination thereof.

For example, when the notified number of multiplexed UEs is 4, the UE judges that the number of UCI subcarriers contained in one PRB is 3 (= 12/4), and the notified starting subcarrier index (eg, 0) The UCI modulation signal may be transmitted using three subcarriers on the basis of.

According to the embodiment described above, it is possible to suppress inter-UE interference even when, for example, the observed subcarrier of the UCI signal deviates in the receiver due to fluctuation of the propagation path.

<Modification>
In the above-mentioned embodiment, although one UE demonstrated the example which maps UCI on a group of continuous subcarriers in 1 PRB, subcarrier mapping is not restricted to this.

FIG. 5 is a diagram showing an example of PUCCH resource mapping in the modification. FIG. 5 shows an example in which 2 UEs (UE1-UE2) are FDM in one PRB as in FIG. 1A.

In this example, in one PRB, one UE maps UCI using multiple sets of one group of consecutive subcarriers. For example, UE1 maps UCI to a set of subcarriers # 0 to # 2 and a set of subcarriers # 6 to # 8. According to this configuration, compared to the case where interference occurs in all UCI resources (FIG. 2), the influence of the interference can be suppressed. In addition, PUCCH resource allocation can be flexibly controlled.

Guard subcarriers may be provided on one or both of the consecutive subcarriers to which the UCI is assigned. A guard subcarrier is a subcarrier which does not map a signal, and may be called a non-transmission subcarrier or the like.

FIG. 6 is a diagram showing another example of PUCCH resource mapping in the modification. FIG. 6 shows a case where guard subcarriers (subcarriers # 0 and # 5 for UE1 and subcarriers # 6 and # 11 for UE2) are provided at both ends of continuous subcarriers of each UE in the example of FIG. 3A. Equivalent to.

The information on the frequency resource of PUCCH (UCI) described above may include information on the presence or absence of guard subcarriers, the number of guard subcarriers, the position of guard subcarriers, and the like. In FIG. 6, the PUCCH resource configuration of each UE is set to be the same (the same setting of guard subcarriers, etc.), but the PUCCH resource configuration of each UE may be different.

By using a guard subcarrier, the influence of the subcarrier position shift can be suppressed more suitably.

The embodiments described above may be applied to long PUCCH or may be applied to short PUCCH. Also, the UCI payload to be transmitted is not limited to a large capacity payload. For example, the transmitted UCI payload may be up to 2 bits of payload.

In the above-described embodiment, DMRS may be mapped to at least one of a group of consecutive UCI subcarriers. Moreover, the above-mentioned embodiment is DMRS based transmission (it may be called DMRS-based transmission, DMRS-based PUCCH, etc.) which notifies UCI by transmitting DM and ULI which carried out DMDM and UCI by TDM and / or FDM. Although it assumed and demonstrated, it is not restricted to this.

For example, in the above-described embodiment, sequence-based transmission (sequence-based transmission, sequence-based PUCCH, etc.) for notifying UCI by transmitting a UL signal using a resource associated with the value of UCI without using DMRS. May be applied).

The UE and / or the base station do not apply CDM in consecutive subcarriers to which UCI is allocated in the above-described embodiment (for example, in the case of DFT-S-OFDM subcarriers, orthogonal spreading before application of DFT processing of a transmission signal) Not be performed). According to this configuration, since the UE and / or the base station may assume that FDM is applied in one PRB, an increase in processing load can be suppressed.

(Wireless communication system)
Hereinafter, the configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present disclosure.

FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The radio communication system 1 applies carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are integrated. can do.

The wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G. It may be called (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology) or the like, or may be called a system for realizing these.

The radio communication system 1 includes a radio base station 11 forming a macrocell C1 with a relatively wide coverage, and radio base stations 12 (12a to 12c) disposed in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. And. Moreover, the user terminal 20 is arrange | positioned at macro cell C1 and each small cell C2. The arrangement, the number, and the like of each cell and the user terminal 20 are not limited to the aspect illustrated in the drawing.

The user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 simultaneously uses the macro cell C1 and the small cell C2 using CA or DC. Also, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (for example, 5 or less CCs, 6 or more CCs).

Communication can be performed between the user terminal 20 and the radio base station 11 using a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth carrier (also called an existing carrier, legacy carrier, etc.). On the other hand, between the user terminal 20 and the radio base station 12, a carrier having a wide bandwidth in a relatively high frequency band (for example, 3.5 GHz, 5 GHz, etc.) may be used. And the same carrier may be used. The configuration of the frequency band used by each wireless base station is not limited to this.

Also, the user terminal 20 can perform communication in each cell using time division duplex (TDD) and / or frequency division duplex (FDD). Also, in each cell (carrier), a single numerology may be applied, or a plurality of different numerologies may be applied.

Numerology may be communication parameters applied to transmission and / or reception of a certain signal and / or channel, for example, subcarrier spacing, bandwidth, symbol length, cyclic prefix length, subframe length , TTI length, number of symbols per TTI, radio frame configuration, filtering process, windowing process, etc. may be indicated.

The wireless base station 11 and the wireless base station 12 (or between the two wireless base stations 12) are connected by wire (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface, etc.) or wirelessly It may be done.

The radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30. The upper station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto. Further, each wireless base station 12 may be connected to the higher station apparatus 30 via the wireless base station 11.

The radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like. Also, the radio base station 12 is a radio base station having local coverage, and is a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), transmission and reception It may be called a point or the like. Hereinafter, when the radio base stations 11 and 12 are not distinguished, they are collectively referred to as the radio base station 10.

Each user terminal 20 is a terminal compatible with various communication schemes such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).

In the radio communication system 1, orthogonal frequency division multiple access (OFDMA) is applied to the downlink as a radio access scheme, and single carrier frequency division multiple access (SC-FDMA: single carrier) to the uplink. Frequency Division Multiple Access and / or OFDMA is applied.

OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers) and data is mapped to each subcarrier to perform communication. SC-FDMA is a single carrier transmission that reduces interference between terminals by dividing the system bandwidth into a band configured by one or continuous resource blocks for each terminal, and a plurality of terminals use different bands. It is a system. The uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.

In the radio communication system 1, a downlink shared channel (PDSCH: Physical Downlink Shared Channel) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, etc. are used as downlink channels. Used. User data, upper layer control information, SIB (System Information Block), etc. are transmitted by the PDSCH. Also, a MIB (Master Information Block) is transmitted by the PBCH.

The downlink L1 / L2 control channel includes PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) and the like. Downlink control information (DCI) including scheduling information of PDSCH and / or PUSCH is transmitted by PDCCH.

In addition, scheduling information may be notified by DCI. For example, DCI scheduling DL data reception may be referred to as DL assignment, and DCI scheduling UL data transmission may be referred to as UL grant.

The number of OFDM symbols used for PDCCH is transmitted by PCFICH. Delivery confirmation information (for example, also referred to as retransmission control information, HARQ-ACK, and ACK / NACK) of HARQ (Hybrid Automatic Repeat reQuest) for the PUSCH is transmitted by the PHICH. The EPDCCH is frequency division multiplexed with a PDSCH (downlink shared data channel), and is used for transmission such as DCI, similarly to the PDCCH.

In the radio communication system 1, as uplink channels, an uplink shared channel (PUSCH: Physical Uplink Shared Channel) shared by each user terminal 20, an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) or the like is used. User data, upper layer control information, etc. are transmitted by PUSCH. Also, downlink radio quality information (CQI: Channel Quality Indicator), delivery confirmation information, scheduling request (SR: Scheduling Request) and the like are transmitted by the PUCCH. The PRACH transmits a random access preamble for establishing a connection with a cell.

In the radio communication system 1, as a downlink reference signal, a cell-specific reference signal (CRS: Cell-specific Reference Signal), a channel state information reference signal (CSI-RS: Channel State Information-Reference Signal), a demodulation reference signal (DMRS: DeModulation Reference Signal, positioning reference signal (PRS), etc. are transmitted. Further, in the wireless communication system 1, a measurement reference signal (SRS: Sounding Reference Signal), a demodulation reference signal (DMRS), and the like are transmitted as uplink reference signals. In addition, DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal). Also, reference signals to be transmitted are not limited to these.

(Wireless base station)
FIG. 8 is a diagram showing an example of the entire configuration of a wireless base station according to an embodiment. The radio base station 10 includes a plurality of transmitting and receiving antennas 101, an amplifier unit 102, a transmitting and receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106. Note that each of the transmitting and receiving antenna 101, the amplifier unit 102, and the transmitting and receiving unit 103 may be configured to include one or more.

User data transmitted from the radio base station 10 to the user terminal 20 by downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.

The baseband signal processing unit 104 performs packet data convergence protocol (PDCP) layer processing, user data division / combination, RLC layer transmission processing such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) for user data. Control) Transmission processing such as retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc. It is transferred to 103. Further, transmission processing such as channel coding and inverse fast Fourier transform is also performed on the downlink control signal and transferred to the transmission / reception unit 103.

The transmission / reception unit 103 converts the baseband signal output from the baseband signal processing unit 104 for each antenna into a radio frequency band and transmits the baseband signal. The radio frequency signal frequency-converted by the transmitting and receiving unit 103 is amplified by the amplifier unit 102 and transmitted from the transmitting and receiving antenna 101. The transmission / reception unit 103 can be configured of a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on the common recognition in the technical field according to the present disclosure. The transmitting and receiving unit 103 may be configured as an integrated transmitting and receiving unit, or may be configured from a transmitting unit and a receiving unit.

On the other hand, for the uplink signal, the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102. The transmitting and receiving unit 103 receives the upstream signal amplified by the amplifier unit 102. The transmission / reception unit 103 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 104.

The baseband signal processing unit 104 performs Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing, and error correction on user data included in the input upstream signal. Decoding, reception processing of MAC retransmission control, and reception processing of RLC layer and PDCP layer are performed, and are transferred to the higher station apparatus 30 via the transmission path interface 106. The call processing unit 105 performs call processing (setting, release, etc.) of the communication channel, state management of the radio base station 10, management of radio resources, and the like.

The transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface. Also, the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from the other wireless base station 10 via an inter-base station interface (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface). May be

The transmitting / receiving unit 103 receives, from the user terminal 20, UCI subjected to FDM with another user terminal 20 in one PRB. The transmitting and receiving unit 103 may transmit, to the user terminal 20, information related to PUCCH (UCI) frequency resources.

FIG. 9 is a diagram illustrating an example of a functional configuration of a wireless base station according to an embodiment of the present disclosure. In addition, in this example, the functional block of the characteristic part in this embodiment is mainly shown, and it may be assumed that the wireless base station 10 also has another functional block required for wireless communication.

The baseband signal processing unit 104 at least includes a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these configurations may be included in the wireless base station 10, and some or all of the configurations may not be included in the baseband signal processing unit 104.

A control unit (scheduler) 301 performs control of the entire radio base station 10. The control unit 301 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present disclosure.

The control unit 301 controls, for example, generation of a signal in the transmission signal generation unit 302, assignment of a signal in the mapping unit 303, and the like. Further, the control unit 301 controls reception processing of a signal in the reception signal processing unit 304, measurement of a signal in the measurement unit 305, and the like.

The control unit 301 schedules (for example, resources) system information, downlink data signals (for example, signals transmitted on PDSCH), downlink control signals (for example, signals transmitted on PDCCH and / or EPDCCH, delivery confirmation information, etc.) Control allocation). Further, the control unit 301 controls generation of the downlink control signal, the downlink data signal, and the like based on the result of determining whether the retransmission control for the uplink data signal is necessary or not.

The control unit 301 controls scheduling of synchronization signals (for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal), downlink reference signals (for example, CRS, CSI-RS, DMRS) and the like.

The control unit 301 may use an uplink data signal (for example, a signal transmitted on PUSCH), an uplink control signal (for example, a signal transmitted on PUCCH and / or PUSCH, delivery confirmation information, etc.), a random access preamble (for example, PRACH). Control the scheduling of transmitted signals, uplink reference signals, etc.

The control unit 301 may control the user terminal 20 to transmit information for mapping uplink control information (UCI) to a part of continuous subcarriers in one resource block (one PRB). Here, at least one of the subcarriers adjacent to the continuous subcarriers may be controlled such that the other user terminal 20 is not a subcarrier to which UCI is mapped.

The control unit 301 may control reception processing (decoding, demodulation, and the like) of UCI transmitted from the user terminal 20.

The transmission signal generation unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal or the like) based on an instruction from the control unit 301, and outputs the downlink signal to the mapping unit 303. The transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on the common recognition in the technical field according to the present disclosure.

The transmission signal generation unit 302 generates, for example, DL assignment for notifying downlink data allocation information and / or UL grant for notifying uplink data allocation information, based on an instruction from the control unit 301. DL assignment and UL grant are both DCI and follow DCI format. Also, coding processing and modulation processing are performed on the downlink data signal according to a coding rate, a modulation method, and the like determined based on channel state information (CSI: Channel State Information) and the like from each user terminal 20.

Mapping section 303 maps the downlink signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the mapped downlink signal to transmission / reception section 103. The mapping unit 303 can be configured from a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present disclosure.

The reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 103. Here, the reception signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20. The received signal processing unit 304 can be configured from a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present disclosure.

The reception signal processing unit 304 outputs the information decoded by the reception process to the control unit 301. For example, when the PUCCH including the HARQ-ACK is received, the HARQ-ACK is output to the control unit 301. Further, the reception signal processing unit 304 outputs the reception signal and / or the signal after reception processing to the measurement unit 305.

The measurement unit 305 performs measurement on the received signal. The measuring unit 305 can be configured from a measuring device, a measuring circuit, or a measuring device described based on the common recognition in the technical field according to the present disclosure.

For example, the measurement unit 305 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, and the like based on the received signal. The measurement unit 305 may use received power (for example, reference signal received power (RSRP)), received quality (for example, reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)). , Signal strength (e.g., received signal strength indicator (RSSI)), channel information (e.g., CSI), and the like. The measurement result may be output to the control unit 301.

(User terminal)
FIG. 10 is a diagram showing an example of the entire configuration of a user terminal according to an embodiment. The user terminal 20 includes a plurality of transmitting and receiving antennas 201, an amplifier unit 202, a transmitting and receiving unit 203, a baseband signal processing unit 204, and an application unit 205. Note that each of the transmitting and receiving antenna 201, the amplifier unit 202, and the transmitting and receiving unit 203 may be configured to include one or more.

The radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202. The transmitting and receiving unit 203 receives the downlink signal amplified by the amplifier unit 202. The transmission / reception unit 203 frequency-converts the received signal into a baseband signal and outputs the result to the baseband signal processing unit 204. The transmission / reception unit 203 can be configured of a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on the common recognition in the technical field according to the present disclosure. The transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.

The baseband signal processing unit 204 performs reception processing of FFT processing, error correction decoding, retransmission control, and the like on the input baseband signal. The downlink user data is transferred to the application unit 205. The application unit 205 performs processing on a layer higher than the physical layer and the MAC layer. Moreover, broadcast information may also be transferred to the application unit 205 among downlink data.

On the other hand, uplink user data is input from the application unit 205 to the baseband signal processing unit 204. The baseband signal processing unit 204 performs transmission processing of retransmission control (for example, transmission processing of HARQ), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, etc. It is transferred to 203. The transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it. The radio frequency signal frequency-converted by the transmitting and receiving unit 203 is amplified by the amplifier unit 202 and transmitted from the transmitting and receiving antenna 201.

The transmitting and receiving unit 203 transmits the UCI mapped by the mapping unit 403 described later to the radio base station 10. The transmission / reception unit 203 may receive, from the radio base station 10, information on frequency resources of PUCCH (UCI).

FIG. 11 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment. In addition, in this example, the functional block of the characteristic part in this embodiment is mainly shown, and it may be assumed that the user terminal 20 also has another functional block required for wireless communication.

The baseband signal processing unit 204 included in the user terminal 20 at least includes a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations may be included in the user terminal 20, and some or all of the configurations may not be included in the baseband signal processing unit 204.

The control unit 401 controls the entire user terminal 20. The control unit 401 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present disclosure.

The control unit 401 controls, for example, generation of a signal in the transmission signal generation unit 402, assignment of a signal in the mapping unit 403, and the like. Further, the control unit 401 controls reception processing of signals in the reception signal processing unit 404, measurement of signals in the measurement unit 405, and the like.

The control unit 401 acquires the downlink control signal and the downlink data signal transmitted from the radio base station 10 from the reception signal processing unit 404. The control unit 401 controls the generation of the uplink control signal and / or the uplink data signal based on the result of determining the necessity of the retransmission control for the downlink control signal and / or the downlink data signal.

The control unit 401 may perform control to map uplink control information (UCI) on some continuous subcarriers in one resource block (1 PRB).

Here, at least one of the subcarriers adjacent to the continuous subcarrier may not be a subcarrier to which another user terminal 20 maps UCI. The control unit 401 may determine the continuous subcarriers such that at least one end in the frequency direction is not adjacent to a subcarrier to which another user terminal 20 maps UCI. The control unit 401 may make the determination based on the information notified from the radio base station 20.

Preferably, subcarriers included in the continuous subcarriers are determined so as not to overlap in frequency with subcarriers to which another user terminal 20 maps UCI.

The number of consecutive subcarriers may be determined based on the number of user terminals 20 that are frequency division multiplexed (FDM) in the 1 PRB. The number of the user terminals 20 may also include the own terminal.

The control unit 401 may perform control to map UCI using a plurality of sets of partial continuous subcarriers in the 1 PRB.

When the control unit 401 acquires various types of information notified from the radio base station 10 from the received signal processing unit 404, the control unit 401 may update parameters used for control based on the information.

The transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal or the like) based on an instruction from the control unit 401, and outputs the uplink signal to the mapping unit 403. The transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit or a signal generation device described based on the common recognition in the technical field according to the present disclosure.

The transmission signal generation unit 402 generates, for example, an uplink control signal related to delivery confirmation information, channel state information (CSI), and the like based on an instruction from the control unit 401. Further, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, when the downlink control signal notified from the radio base station 10 includes a UL grant, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal.

Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the uplink signal to transmission / reception section 203. The mapping unit 403 can be configured from a mapper, a mapping circuit, or a mapping device described based on the common recognition in the technical field according to the present disclosure.

The reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 203. Here, the reception signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, or the like) transmitted from the radio base station 10. The received signal processing unit 404 can be configured from a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present disclosure. Further, the received signal processing unit 404 can configure a receiving unit according to the present disclosure.

The reception signal processing unit 404 outputs the information decoded by the reception process to the control unit 401. The received signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, the reception signal processing unit 404 outputs the reception signal and / or the signal after reception processing to the measurement unit 405.

The measurement unit 405 performs measurement on the received signal. The measuring unit 405 can be configured from a measuring device, a measuring circuit, or a measuring device described based on the common recognition in the technical field according to the present disclosure.

For example, the measurement unit 405 may perform RRM measurement, CSI measurement, and the like based on the received signal. The measurement unit 405 may measure reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), channel information (for example, CSI), and the like. The measurement result may be output to the control unit 401.

(Hardware configuration)
The block diagram used for the explanation of the above-mentioned embodiment has shown the block of a functional unit. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block may be realized using one physically and / or logically coupled device, or directly and / or two or more physically and / or logically separated devices. Or it may connect indirectly (for example, using a wire communication and / or radio), and it may be realized using a plurality of these devices.

For example, a wireless base station, a user terminal, and the like in an embodiment of the present disclosure may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 12 is a diagram illustrating an example of a hardware configuration of a wireless base station and a user terminal according to an embodiment. The above-described wireless base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007 and the like. Good.

In the following description, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the figure, or may be configured without including some devices.

For example, although only one processor 1001 is illustrated, there may be a plurality of processors. Also, the processing may be performed by one processor, or the processing may be performed by one or more processors simultaneously, sequentially or using other techniques. The processor 1001 may be implemented by one or more chips.

Each function in the radio base station 10 and the user terminal 20 is calculated by causing the processor 1001 to read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the communication device 1004 is performed. This is realized by controlling communication, and controlling reading and / or writing of data in the memory 1002 and the storage 1003.

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.

Also, the processor 1001 reads a program (program code), a software module, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, or may be realized similarly for other functional blocks.

The memory 1002 is a computer readable recording medium, and for example, at least at least a read only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), or any other suitable storage medium. It may be configured by one. The memory 1002 may be called a register, a cache, a main memory (main storage device) or the like. The memory 1002 may store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to an embodiment.

The storage 1003 is a computer readable recording medium, and for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM), etc.), a digital versatile disk, Blu-ray® disc), removable disc, hard disc drive, smart card, flash memory device (eg card, stick, key drive), magnetic stripe, database, server, at least one other suitable storage medium May be configured by The storage 1003 may be called an auxiliary storage device.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like to realize, for example, frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured. For example, the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, and the like) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between devices.

Also, the radio base station 10 and the user terminal 20 may be microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), etc. Hardware may be included, and part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Modification)
The terms described in the present specification and / or the terms necessary for the understanding of the present specification may be replaced with terms having the same or similar meanings. For example, the channels and / or symbols may be signaling. Also, the signal may be a message. The reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot (Pilot), a pilot signal or the like according to an applied standard. Also, a component carrier (CC: Component Carrier) may be called a cell, a frequency carrier, a carrier frequency or the like.

Also, the radio frame may be configured by one or more periods (frames) in the time domain. Each of the one or more periods (frames) that constitute a radio frame may be referred to as a subframe. Furthermore, a subframe may be configured by one or more slots in the time domain. The subframes may be of a fixed time length (e.g., 1 ms) independent of the neurology.

Furthermore, the slot may be configured by one or more symbols in the time domain (such as orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, etc.). Also, the slot may be a time unit based on the neurology. Also, the slot may include a plurality of minislots. Each minislot may be configured by one or more symbols in the time domain. Minislots may also be referred to as subslots.

A radio frame, a subframe, a slot, a minislot and a symbol all represent time units when transmitting a signal. For radio frames, subframes, slots, minislots and symbols, other names corresponding to each may be used. For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as a TTI, and one slot or one minislot may be referred to as a TTI. May be That is, the subframe and / or TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be. The unit representing TTI may be called a slot, a minislot, etc. instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the radio base station performs scheduling to assign radio resources (frequency bandwidth usable in each user terminal, transmission power, etc.) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit of a channel encoded data packet (transport block), a code block, and / or a codeword, or may be a processing unit such as scheduling and link adaptation. Note that, when a TTI is given, the time interval (eg, the number of symbols) in which the transport block, the code block, and / or the codeword is actually mapped may be shorter than the TTI.

If one slot or one minislot is referred to as TTI, one or more TTIs (ie, one or more slots or one or more minislots) may be the minimum time unit of scheduling. In addition, the number of slots (the number of minislots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, or the like. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, or the like.

Note that a long TTI (for example, a normal TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms, and a short TTI (eg, a shortened TTI, etc.) is less than the TTI length of long TTI and 1 ms. It may replace with TTI which has the above TTI length.

A resource block (RB: Resource Block) is a resource allocation unit in time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. Also, an RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length. One TTI and one subframe may be respectively configured by one or more resource blocks. Note that one or more RBs may be a physical resource block (PRB: Physical RB), a subcarrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, etc. It may be called.

Also, a resource block may be configured by one or more resource elements (RE: Resource Element). For example, one RE may be one subcarrier and one symbol radio resource region.

The above-described structures such as the radio frame, subframe, slot, minislot and symbol are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB The number of subcarriers, as well as the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be variously changed.

Also, the information, parameters, etc. described in the present specification may be expressed using absolute values, may be expressed using relative values from predetermined values, or other corresponding information. May be represented. For example, radio resources may be indicated by a predetermined index.

The names used for parameters and the like in the present specification are not limited names in any respect. For example, since various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable names, various assignments are made to these various channels and information elements. The name is not limited in any way.

The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips etc that may be mentioned throughout the above description may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of

Also, information, signals, etc. may be output from the upper layer to the lower layer and / or from the lower layer to the upper layer. Information, signals, etc. may be input / output via a plurality of network nodes.

The input / output information, signals and the like may be stored in a specific place (for example, a memory) or may be managed using a management table. Information, signals, etc. input and output can be overwritten, updated or added. The output information, signals and the like may be deleted. The input information, signals and the like may be transmitted to other devices.

The notification of information is not limited to the aspects / embodiments described herein, and may be performed using other methods. For example, notification of information may be physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling, other signals, or a combination thereof.

The physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like. Also, RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like. Also, MAC signaling may be notified using, for example, a MAC control element (MAC CE (Control Element)).

In addition, notification of predetermined information (for example, notification of "being X") is not limited to explicit notification, but implicitly (for example, by not notifying the predetermined information or other information Notification may be performed).

The determination may be performed by a value (0 or 1) represented by one bit, or may be performed by a boolean value represented by true or false. , Numerical comparison (for example, comparison with a predetermined value) may be performed.

Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.

Also, software, instructions, information, etc. may be sent and received via a transmission medium. For example, software may use a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or a wireless technology (infrared, microwave, etc.), a website, a server These or other wired and / or wireless technologies are included within the definition of the transmission medium, as transmitted from a remote source, or other remote source.

The terms "system" and "network" as used herein are used interchangeably.

As used herein, “base station (BS: Base Station)”, “radio base station”, “eNB”, “gNB”, “cell”, “sector”, “cell group”, “carrier” and “component” The term "carrier" may be used interchangeably. A base station may also be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, femtocell, small cell, and so on.

A base station may accommodate one or more (e.g., three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small base station for indoor use (RRH: Communication services may also be provided by the Remote Radio Head, where the term "cell" or "sector" refers to part or all of the coverage area of a base station and / or a base station subsystem serving communication services in this coverage. Point to.

As used herein, the terms "mobile station (MS)," user terminal "," user equipment (UE) "and" terminal "may be used interchangeably. .

The mobile station may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, by those skilled in the art. It may also be called a terminal, a remote terminal, a handset, a user agent, a mobile client, a client or some other suitable term.

Also, the radio base station in the present specification may be replaced with a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a wireless base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device). In this case, the user terminal 20 may have a function that the above-described radio base station 10 has. Moreover, the wordings such as "up" and "down" may be read as "side". For example, the upstream channel may be read as a side channel.

Similarly, a user terminal herein may be read at a radio base station. In this case, the radio base station 10 may have a function that the above-described user terminal 20 has.

In the present specification, the operation supposed to be performed by the base station may be performed by its upper node in some cases. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be a base station, one or more network nodes other than the base station (eg, It is apparent that this can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc. but not limited thereto or a combination thereof.

Each aspect / embodiment described in this specification may be used alone, may be used in combination, and may be switched and used along with execution. Moreover, as long as there is no contradiction, you may replace the order of the processing procedure of each aspect / embodiment, sequence, flowchart, etc. which were demonstrated in this specification. For example, for the methods described herein, elements of the various steps are presented in an exemplary order and are not limited to the particular order presented.

Each aspect / embodiment described in the present specification includes 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), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802 .20, UWB (Ultra-Wide Band), Bluetooth (registered trademark) And / or systems based on other suitable wireless communication methods and / or extended next generation systems based on these.

The phrase "based on", as used herein, does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

Any reference to an element using the designation "first", "second" and the like as used herein does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be taken or that the first element must somehow precede the second element.

The term "determining" as used herein may encompass a wide variety of operations. For example, “determination” may be calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data) A search on structure), ascertaining, etc. may be considered as "determining". Also, "determination" may be receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (access) It may be considered as "determining" (eg, accessing data in memory) and the like. Also, “determination” is considered to be “determination” to resolve, select, choose, choose, establish, compare, etc. It is also good. That is, "determination" may be considered as "determining" some action.

As used herein, the terms "connected", "coupled", or any variation thereof, refers to any direct or indirect connection between two or more elements or It means a bond and can include the presence of one or more intermediate elements between two elements "connected" or "connected" to each other. The coupling or connection between elements may be physical, logical or a combination thereof. For example, "connection" may be read as "access".

As used herein, when two elements are connected, using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-exclusive examples, the radio frequency domain It can be considered as "connected" or "coupled" with one another using electromagnetic energy or the like having wavelengths in the microwave region and / or the light (both visible and invisible) regions.

As used herein, the term "A and B are different" may mean "A and B are different from each other". The terms "leave", "combined" and the like may be interpreted similarly.

As used herein and in the appended claims, when "including", "comprising", and variations thereof are used, these terms as well as the term "comprising" are inclusive. Intended to be Further, it is intended that the term "or" as used herein or in the claims is not an exclusive OR.

Although the present invention has been described above in detail, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modifications and changes without departing from the spirit and scope of the present invention defined based on the description of the claims. Therefore, the description in the present specification is for the purpose of illustration and does not provide any limiting meaning to the present invention.

Claims (5)

1. A control unit that performs control to map uplink control information to a part of continuous subcarriers in one resource block;
   And a transmitter configured to transmit the mapped uplink control information.
2. The user terminal according to claim 1, wherein the control unit determines the consecutive subcarriers such that the other user terminal includes a subcarrier whose at least one end is not adjacent to a subcarrier to which uplink control information is mapped.
3. The user terminal according to claim 1 or 2, wherein the number of consecutive subcarriers is determined based on the number of user terminals to be frequency division multiplexed in the one resource block.
4. The user terminal according to any one of claims 1 to 3, wherein the control unit performs control of mapping the uplink control information by using a plurality of sets of partial continuous subcarriers in the one resource block.
5. A wireless communication method of a user terminal, comprising
   Performing control to map uplink control information to a part of continuous subcarriers in one resource block;
   Transmitting the mapped uplink control information.
   

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