CN111213423B - User terminal and wireless communication method - Google Patents

Abstract

Interference between uplink data signals and uplink control signals transmitted by different user terminals is suppressed. The user terminal for wireless communication with the wireless base station includes: a receiving unit configured to receive resource information indicating radio resources of uplink control signals transmitted by other user terminals; a mapping unit that maps the uplink data signal to a radio resource different from the radio resource indicated by the resource information; and a transmitting unit that transmits the uplink data signal mapped to the radio resource.

Description

User terminal and wireless communication method

Technical field

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

Background technique

In the UMTS (Universal Mobile Telecommunications System) network, Long Term Evolution (LTE: Long Term Evolution) has become a norm for the purpose of further high-speed data rates, low latency, etc. (Non-Patent Document 1). In addition, for the purpose of further widening the bandwidth and increasing the speed of LTE, a follow-up system to LTE is also being studied. Among the subsequent systems of LTE, there are, for example, called LTE-A (LTE-Advanced), FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G+ (5G plus), New (New)-RAT (Radio Access Technology) systems.

existing technical documents

non-patent literature

Non-patent document 1: 3GPP TS 36.300 v13.4.0, "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 13)," June 2016

Contents of the invention

Invent the problem to be solved

However, currently in 5G, there is no regulation on the transmission method or resource allocation in an environment where uplink data signals sent by a certain user terminal and uplink control signals sent by other user terminals coexist. Therefore, if a certain user terminal transmits an uplink data signal and another user terminal transmits an uplink control signal in the same resource, there is a concern that signal interference may occur.

Therefore, an object of the present invention is to provide a technology for suppressing interference between uplink data signals and uplink control signals transmitted by different user terminals.

Means used to solve problems

The user terminal of the present invention is a user terminal that performs wireless communication with a wireless base station, and has: a receiving unit that receives resource information indicating wireless resources of uplink control signals sent by other user terminals; and a mapping unit that maps the uplink data signals to the corresponding uplink data signals. The wireless resources represented by the resource information are different wireless resources; and a sending unit is configured to send the uplink data signal mapped to the wireless resource.

Effect of the invention

According to the present invention, interference between uplink data signals and uplink control signals sent by different user terminals can be suppressed.

Description of drawings

FIG. 1 is a diagram showing a structural example of the wireless communication system according to the first embodiment.

FIG. 2 is a diagram illustrating an example of UL bandwidth of a user terminal.

FIG. 3 is a diagram illustrating an example of interference between a UL control signal and a UL data signal.

FIG. 4 is a diagram illustrating an example of allocation of UL data signals to user terminals.

FIG. 5 is a diagram explaining an operation example of the wireless communication system.

FIG. 6 is a diagram showing a block configuration example of a wireless base station.

FIG. 7 is a diagram showing a block structure example of a user terminal.

FIG. 8 is a diagram explaining an example of puncturing processing.

FIG. 9 is a diagram illustrating an example of adjustment of the coding rate.

FIG. 10 is a flowchart showing an example of the transmission operation of the UL data signal by the user terminal.

FIG. 11 is a diagram explaining an operation example of the wireless communication system according to the second embodiment.

FIG. 12 is a diagram showing an example of bands allocated to UL data signals and UL control signals.

FIG. 13 is a diagram explaining an operation example of the wireless communication system according to the third embodiment.

FIG. 14 is a table showing an example of the relationship between the number of RBs allocated to the UL data signal, the number of RBs allocated to the UL control signal, and correction values.

FIG. 15 is a diagram showing an example of the hardware configuration of a wireless base station and a user terminal according to the embodiment.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(first embodiment)

FIG. 1 is a diagram showing a structural example of the wireless communication system according to the first embodiment. As shown in FIG. 1 , a wireless communication system includes a wireless base station 1 and user terminals 2 and 3 .

The wireless base station 1 is a wireless base station to which New-RAT is applied. The wireless base station 1 has, for example, several dozen to several hundred antennas, and performs wireless communication with the user terminals 2 and 3 in a high frequency band (for example, a frequency band of 5 GHz or higher). The wireless base station 1 controls the amplitude and phase of the signal using multiple antennas to form a directional beam, and transmits and receives signals with the user terminals 2 and 3 . The user terminals 2 and 3 are, for example, mobile phones, smart phones, or tablet terminals.

The wireless base station 1 is connected to a core network (not shown). The core network may also include higher-level devices such as MME (Mobility Management Entity), S-GW (Serving Gateway), or P-GW (Pakcet Data network Gateway). .

Furthermore, the wireless base station 1 may be separated into, for example, an extension station that performs wireless communication with the user terminals 2 and 3, and a BBU (BaseBand processing unit) that controls the extension station, so as to communicate with the C-RAN (centralized RAN). Radio access network (Centralized Radio Access Network) or advanced C-RAN correspondence. Furthermore, only two user terminals 2 and 3 are shown in FIG. 1 , but in this embodiment, there may be three or more user terminals.

FIG. 2 is a diagram illustrating an example of UL (Up Link) bandwidth of user terminals 2 and 3 . The bandwidth W1a shown in FIG. 2 represents the transmittable bandwidth in the UL of the user terminal 2. The bandwidth W1b indicates the transmittable bandwidth in the UL of the user terminal 3 .

In 5G UL, in order to achieve high speed and large capacity, research is being conducted on transmitting data over broadband. Furthermore, in 5G UL, it is assumed that the bandwidth capable of communication differs for each user terminal 2 or 3 . For example, as shown by the bandwidths W1a and W1b, it is assumed that the user terminals 2 and 3 have different transmittable bandwidths in the UL.

FIG. 3 is a diagram illustrating an example of interference between a UL control signal and a UL data signal. The bandwidth W2a shown in FIG. 3 shows an example of the bandwidth allocated to the UL data signal of the user terminal 2. The UL data signal may be, for example, PUSCH (Physical Uplink Shared Channel).

The bandwidth W2b shows an example of the bandwidth allocated to the UL control signal of the user terminal 3. The UL control signal may be, for example, PUCCH (Physical Uplink Control Channel).

Furthermore, the bandwidth W1b represented by a dotted line represents the transmittable bandwidth in the UL of the user terminal 3 explained in FIG. 2 .

In a single carrier basis such as DFT-s-OFDM (Discrete Fourier Transform-Spread Orthogonal Frequency Division Multiplexing), for example, as shown in the bandwidth W2a, W2b, the UL data signal and the UL Control signals are assigned to consecutive bands. In the case of OFDM, in order to simplify the control of resource allocation and achieve low PAPR (Peak to Average PowerRation), UL data signals and UL control signals are also allocated to a continuous band or multiple continuous bands. band area.

As explained in FIG. 2 , it is assumed that the communicable bandwidth in 5G UL differs for each user terminal 2 or 3 . Furthermore, it is assumed that the UL data signal is transmitted over a wide band in order to achieve high speed and large capacity. Therefore, the UL data signal transmitted by the user terminal 2 and the UL control signal transmitted by the user terminal 3 may interfere (collide).

For example, in the example of FIG. 3 , the bandwidth W2a of the UL data signal allocated to the user terminal 2 is wider than the transmittable bandwidth W1b of the user terminal 3 . Furthermore, the UL control signal of the user terminal 3 is transmitted using the bandwidth W2b within the bandwidth W1b. Therefore, the bandwidth W2a of the UL data signal transmitted by the user terminal 2 sometimes overlaps with the bandwidth W2b allocated for the transmission of the UL control signal of the user terminal 3. Therefore, the UL data signal transmitted by the user terminal 2 and the UL control signal transmitted by the user terminal 3 may interfere with each other.

Furthermore, in LTE, the bands at both ends of the system band are used for transmitting the UL control signal. For example, in LTE, the UL control signal is transmitted in the bands at both ends of the bandwidth W1b shown in FIG. 3 . Even if the bands at both ends of the bandwidth W1b are used, this band overlaps with the bandwidth W2a of the UL data signal of the user terminal 2. Therefore, the UL control signal of the user terminal 3 may interfere with the UL data signal of the user terminal 2 .

Therefore, the user terminal 2 does not allocate the UL data signal in the band (radio resource) of the UL control signal transmitted by the other user terminal 3 .

FIG. 4 is a diagram explaining an example of allocation of UL data signals of the user terminal 2. The bandwidth W3a shown in FIG. 4 shows an example of the bandwidth allocated to the UL data signal of the user terminal 2. Bandwidth W3b shows an example of the bandwidth allocated to the UL control signal of user terminal 3.

As shown by the bandwidth W3a, the user terminal 2 that transmits the UL data signal does not allocate the UL data signal in a band that overlaps with the bandwidth of the UL control signal of the user terminal 3 shown by the bandwidth W3b. Therefore, interference between the UL data signal of the user terminal 2 and the UL control signal of the user terminal 3 is suppressed.

FIG. 5 is a diagram explaining an operation example of the wireless communication system. Processing S1 shown in FIG. 5 shows an example of processing by the wireless base station 1 shown in FIG. 1 . Process S2 shows an example of processing by the user terminals 2 and 3 .

The radio base station 1 periodically notifies the user terminals 2 and 3 of the resource information of the UL control signal (S1a).

The resource information includes information on the band used by the user terminals 2 and 3 to transmit UL control signals. For example, the resource information may also include information about the bandwidth W3b shown in FIG. 4 .

The resource information (band information of the UL control signal) is common (identical) between the user terminals 2 and 3 . When the user terminals 2 and 3 transmit UL control signals, the UL control signals are allocated to the bands included in the received resource information and are transmitted to the wireless base station 1 . That is, the user terminals 2 and 3 allocate UL control signals to the band notified from the wireless base station 1 and transmit them to the wireless base station 1 .

The radio base station 1 notifies the user terminals 2 and 3 of the resource information of the UL control signal at intervals of several tens of milliseconds, for example. The radio base station 1 may change the band included in the resource information of the UL control signal.

The radio base station 1 uses the DL control information to notify the user terminals 2 and 3 of information indicating whether other user terminals transmit UL control signals (S1b).

The DL control information may be DCI (Downlink Control Information), for example. For example, when the user terminal 3 transmits a UL control signal and the user terminal 2 transmits a UL data signal, the DCI transmitted to the user terminal 2 includes information indicating that the other user terminal 3 transmits the UL control signal. Furthermore, for example, when the user terminal 2 transmits a UL control signal and the user terminal 3 transmits a UL data signal, the DCI transmitted to the user terminal 3 includes information indicating that the other user terminal 2 transmits the UL control signal. Furthermore, information indicating whether other user terminals transmit UL control signals may be reported to the user terminals 2 and 3 using a predetermined bit (for example, 1 bit) of the DCI, for example.

Processing examples of the user terminals 2 and 3 will be described. The user terminals 2 and 3 receive the resource information notified from the wireless base station 1, and set the band of the UL control signal included in the received resource information to a mapping unit (for example, see FIG. 7) as will be described later (for example, see FIG. 7) ( S2a).

When transmitting the UL control signal, the mapping unit maps the UL control signal to the set band. For example, when the resource information notified from the radio base station 1 includes the band information of the bandwidth W3b shown in FIG. 4 , the mapping units of the user terminals 2 and 3 map the UL control signal to the bandwidth W3b shown in FIG. 4 .

Here, the case where the user terminal 2 transmits the UL data signal to the radio base station 1 and the user terminal 2 transmits the UL control signal to the radio base station 1 will be described.

The user terminal 2 determines whether other user terminal 3 transmits a UL control signal from the DL control information transmitted by the radio base station 1 (S2b). For example, the user terminal 2 refers to a predetermined 1 bit of DCI to determine whether the other user terminal 3 transmits the UL control signal.

When the other user terminal 3 transmits the UL control signal, the user terminal 2 does not allocate the UL data signal in the resource information (band of the UL control signal) notified from the radio base station 1 (S2c). For example, as shown in the bandwidth W3a of FIG. 4 , the user terminal 2 does not allocate the UL data signal in the band overlapping with the bandwidth W3b to which the UL control signal is allocated.

Through the above processing, the user terminals 2 and 3 can suppress interference between the UL data signal and the UL control signal transmitted by other user terminals and transmit it to the wireless base station 1 .

Furthermore, in the above description, the user terminal 2 transmits the UL data signal to the radio base station 1 and the user terminal 2 transmits the UL control signal to the radio base station 1, but the reverse is also true. That is, the processing in the case where the user terminal 3 transmits the UL data signal to the radio base station 1 and the user terminal 2 transmits the UL control signal to the radio base station 1 is also the same as the above-mentioned process.

FIG. 6 is a diagram showing an example of the block structure of the wireless base station 1. As shown in FIG. 6 , the wireless base station 1 has a control unit (scheduler) 21 , a transmission signal generation unit 22 , a coding/modulation unit 23 , a mapping unit 24 , an RF transmission unit 25 , and an antenna 26 .

The control unit 21 performs scheduling of DL data signals, DL control signals, and the like. The DL data signal may be, for example, PDSCH (Physical Downlink Shared Channel). The DL control signal may be, for example, PDCCH (Physical Downlink Control Channel).

Furthermore, the control unit 21 schedules the resource information of the UL control signal notified to the user terminals 2 and 3 . The resource information may also be provided by, for example, RRC (Radio Resource Control), S1 connection setting, MIB (Master Information Block), SIB (System Information Block), RA response ( RA response), paging (Paging) message, etc. are notified to the user terminals 2 and 3. Furthermore, when the resource information is not notified, the user terminals 2 and 3 may use the resource information determined in advance in the specification or the last set resource information.

The transmission signal generation unit 22 generates a DL signal (including a DL data signal, a DL control signal, resource information of a UL control signal, etc.). For example, the DL control signal includes DCI including scheduling information generated by the control unit 21 and the like. The transmission signal generation unit 22 outputs the generated DL signal to the encoding/modulation unit 23 .

The encoding/modulation unit 23 performs encoding processing and modulation processing on the DL signal. The encoding/modulation unit 23 outputs the encoded/modulated DL signal to the mapping unit 24 .

The mapping unit 24 maps the DL signal output from the encoding/modulation unit 23 to radio resources based on the scheduling of the control unit 21 .

The RF transmission unit 25 performs transmission processing such as up-conversion and amplification on the DL signal output from the mapping unit 24, and transmits it to the user terminal 2 from the plurality of antennas 26.

Furthermore, although not shown in FIG. 6 , the wireless base station 1 has a reception processing unit that processes UL data signals, UL control signals, and the like transmitted from the user terminals 2 and 3 . For example, the radio base station 1 has a demapping unit, a channel estimation unit, a demodulation/decoding unit, and the like.

Furthermore, in FIG. 6 , description of structural units for generating signal waveforms (for example, IFFT processing unit, CP addition unit, CP removal unit, FFT processing unit, etc.) is omitted. Furthermore, in FIG. 6 , description of structural units (for example, precoding units, etc.) for implementing MIMO processing is omitted.

FIG. 7 is a diagram showing an example of the block structure of the user terminal 2. As shown in FIG. 7 , the user terminal 2 has an antenna 31, an RF transmission and reception unit 32, a demapping unit 33, a channel estimation unit 34, a demodulation/decoding unit 35, a transmission signal generation unit 36, a coding/modulation unit 37, and a mapping unit. Unit 38. Furthermore, the user terminal 3 also has the same block structure example as in FIG. 7 , and its description is omitted.

The DL signal transmitted by the wireless base station 1 and received by one or a plurality of antennas 31 is input to the RF transmitting and receiving unit 32 . The RF transmitting and receiving unit 32 performs reception processing such as amplification and down-conversion on the input DL signal. The RF transmitting and receiving unit 32 outputs the reception-processed DL signal to the demapping unit 33 .

The demapping unit 33 separates (demaps) the DL control signal from the DL signal output by the RF transmission and reception unit 32 . Furthermore, the demapping unit 33 separates the DL data signal destined for itself from the DL signal output by the RF transmitting and receiving unit 32 based on the scheduling information (DL radio resource allocation information) output from the demodulation/decoding unit 35 . Furthermore, the demapping unit 33 separates the resource information of the UL control signal from the DL signal output by the RF transmission and reception unit 32 .

The DL control signal demapped by the demapping unit 33 is input to the channel estimation unit 34 . Channel estimation unit 34 estimates the channel state of the DL based on the reference signal included in the input DL control signal. Channel estimation unit 34 outputs the estimated channel state of the DL to demodulation/decoding unit 35 .

The channel state of the DL estimated by the channel estimation unit 34 is input to the demodulation/decoding unit 35 . Furthermore, the DL control signal, DL data signal, resource, etc. demapped by the demapping unit 33 are input to the demodulation/decoding unit 35 . Demodulation/decoding unit 35 demodulates and decodes the resource information of the DL control signal, DL data signal, and UL control signal demapped by demapping unit 33 based on the channel state estimated by channel estimation unit 34 .

Transmission signal generation unit 36 generates a UL signal including a UL data signal and a UL control signal.

The UL signal output from the transmission signal generation unit 36 is input to the encoding/modulation unit 37 . Furthermore, the MCS (Modulation and Coding Scheme) information of the UL output from the demodulation/decoding unit 35 is input to the encoding/modulation unit 37 . Encoding/modulation section 37 performs encoding processing and modulation processing on the UL signal output from transmission signal generation section 36 based on the input MCS information of UL.

Furthermore, when the timing of transmitting the UL data signal to the wireless base station 1 overlaps with the timing of transmitting the UL control signal by the other user terminal 3 , the encoding/modulation unit 37 performs puncturing processing on the UL data signal and adjusts the coding rate. One of the processed. The puncturing process and the coding rate adjustment process are explained below.

The UL signal that has been encoded and modulated by the encoding/modulation unit 37 is input to the mapping unit 38 . Furthermore, the UL scheduling information demodulated and decoded by the demodulation/decoding unit 35 is input to the mapping unit 38 . Mapping unit 38 maps the UL signal input from encoding/modulation unit 37 to a predetermined radio resource (UL resource) based on the UL scheduling information input from demodulation/decoding unit 35 .

Furthermore, the resource information of the UL control signal demodulated and decoded by the demodulation/decoding unit 35 is input (set) to the mapping unit 38 . When mapping the UL control signal to the radio resource, the mapping unit 38 maps the UL control signal to the radio resource based on the set resource information.

Furthermore, when the DCI includes information indicating that the other user terminal 3 transmits the UL control signal, the mapping unit 38 does not map the UL data signal to the radio resource in the band to which the UL control signal is mapped.

Furthermore, the user terminal 2 can also send the UL signal to the wireless base station 1 through DFT-s-OFDM. In this case, the DFT unit is inserted in the previous stage of the mapping unit 38 , and the IFFT unit is inserted in the subsequent stage of the mapping unit 38 . Furthermore, the user terminal 2 may also send the UL signal to the wireless base station 1 through OFDM. In this case, mapping unit 38 maps the UL signal to the radio resources of one or more consecutive bands. Furthermore, the user terminal 2 may also have a structural unit (for example, a precoding unit, etc.) for implementing MIMO processing.

FIG. 8 is a diagram explaining an example of puncturing processing. The bandwidths W4a and W4b shown in FIG. 8 represent the bands allocated to the UL data signal of the user terminal 2.

The bandwidth W4c shown by the dotted line represents the band allocated to the UL control signal. The user terminal 3 uses the bandwidth W4c to transmit the UL control signal.

It is assumed that the bandwidths W4a and W4b correspond to, for example, 48 RB of the radio resource, and the bandwidth W4c corresponds to, for example, 2 RB of the radio resource.

In this case, encoding/modulation section 37 generates a UL data signal having a size of 50 RB according to the MCS information.

The mapping unit 38 maps the UL data signal generated by the encoding/modulation unit 37 to radio resources. At this time, the mapping unit 38 punctures the 2RB amount allocated to the UL control signal from the UL data signal to be mapped. In the case of FIG. 8 , mapping unit 38 punctures RBs (2 RB amounts) at positions corresponding to the bandwidth W4c from the mapped UL data signal of 50 RBs. That is, the mapping unit 38 maps the UL data signal to the radio resource so as to avoid the band in which other user terminals 3 map the UL control signal.

Through this process, the user terminal 2 can suppress interference between the UL data signal and the UL control signal of the user terminal 3, and can suppress a decrease in the error rate of the UL control signal and a decrease in the error rate of the UL data signal. Furthermore, encoding/modulation section 37 may puncture RBs (2 RB amounts) at positions corresponding to the bandwidth W4c from the generated UL data signal of 50 RBs.

FIG. 9 is a diagram illustrating an example of adjustment of the coding rate. In FIG. 9 , the same parts as in FIG. 8 are assigned the same reference numerals. As in FIG. 8 , it is assumed that the bandwidths W4a and W4b correspond to, for example, 48 RBs of radio resources, and the bandwidth W4c corresponds to, for example, 2 RBs of radio resources.

Encoding/modulation section 37 generates a UL data signal having a size of 48 RB corresponding to bandwidths W4a and W4b. For example, as shown in FIG. 9 , encoding/modulation unit 37 generates 48 RB amount of UL data signal D3 (size xRB of D1 + size yRB of D2 = 48 RB of size of D3).

When generating the UL data signal D3, the encoding/modulation section 37 adjusts the encoding rate of the UL data signal D3 so that an amount of the UL data signal corresponding to the bandwidth W4c (an amount of 2 RB) is included in the UL data signal D3. For example, the encoding/modulation unit 37 increases the encoding rate of the UL data signal D3.

The mapping unit 38 maps the UL data signal D3 with the adjusted coding rate to wireless resources. At this time, mapping unit 38 does not map the UL data signal D3 to the radio resource to which the UL control signal is mapped. That is, the mapping unit 38 maps the UL data signal to the radio resource so as to avoid the band in which other user terminals 3 map the UL control signal.

Through this processing, interference between the UL data signal of the user terminal 2 and the UL control signal of the user terminal 3 can be suppressed, and a decrease in the error rate of the UL control signal and a decrease in the error rate of the UL data signal can be suppressed.

Furthermore, the encoding/modulation unit 37 may switch the puncturing process and the coding rate adjustment process according to external control. Furthermore, the encoding/modulation unit 37 may have only one function of puncturing processing and coding rate adjustment processing.

FIG. 10 is a flowchart showing an example of the transmission operation of the UL data signal by the user terminal 2. It is assumed that the user terminal 2 receives resource information periodically notified from the wireless base station 1 .

The control unit (not shown in FIG. 7 ) of the user terminal 2 determines whether there is a UL data signal transmitted to the wireless base station 1 (step S11). When it is determined that there is no UL data signal transmitted to the wireless base station 1 (NO in S11), the control unit ends the process of this flowchart.

On the other hand, when it is determined that there is a UL data signal transmitted to the wireless base station 1 (YES in S11), the control unit determines whether the other user terminal 3 transmits a UL control signal (step S12). For example, the control unit refers to a predetermined bit of the DCI to determine whether the other user terminal 3 transmits the UL control signal.

When it is determined that the other user terminal 3 has not transmitted the UL control signal (NO in step S12), the control unit proceeds to step S14.

When the process proceeds to step S14, the user terminal 2 performs normal transmission processing (step S14). For example, the coding/modulation unit 37 performs coding/modulation processing on the UL data signal according to the MCS information, and the mapping unit 38 maps the UL data signal to wireless resources based on the UL scheduling information. The UL data signal mapped to the radio resource is transmitted to the radio base station 1 via the RF transmission and reception unit 32 .

On the other hand, if it is determined in step S12 that the other user terminal 3 transmits the UL control signal (YES in step S12), the control unit proceeds to step S13.

When puncturing is performed, the encoding/modulation unit 37 performs encoding/modulation on the UL data signal. The mapping unit 38 maps the encoded/modulated UL data signal to wireless resources. At this time, the mapping unit 38 punctures the signal corresponding to the radio resource to which the UL control signal is allocated (step S13).

On the other hand, when performing the coding rate adjustment process, coding/modulation section 37 increases the coding rate so that the UL data signal is mapped to radio resources other than the radio resources equivalent to the UL control signal. Then, the mapping unit 38 maps the UL data signal encoded/modulated in the encoding/modulation unit 37 to the radio resource. At this time, mapping unit 38 does not map the UL data signal in the radio resources allocated to the UL control signal (step S13). The RF transmitting and receiving unit 32 transmits the UL data signal mapped to the radio resource to the radio base station 1 (step S13).

As explained above, the RF transmission and reception unit 32 of the user terminal 2 receives the resource information of the UL control signal transmitted by the other user terminal 3 . The mapping unit 38 maps the UL data signal to the wireless resource, and the RF transmitting and receiving unit 32 wirelessly transmits the UL data signal to the wireless base station 1 . Then, when the DCI includes information indicating the transmission of the UL control signal by the other user terminal 3 , the mapping unit 38 maps the UL data signal to a radio in a band different from the band of the UL control signal indicated by the resource information. resource. Through this processing, the user terminal 2 can suppress interference between the UL data signal and the UL control signal.

(Second Embodiment)

In the first embodiment, the radio base station 1 notifies the user terminals 2 and 3 of the resource information of the UL control signal through RRC, MIB, SIB, RA response, paging message, etc. In the second embodiment, the radio base station 1 notifies the user terminals 2 and 3 of the resource information of the UL control signal using the DL control information.

Furthermore, in the second embodiment, when the user terminal 2 transmits a UL data signal and the other user terminal 3 transmits a UL control signal, the radio base station 1 allocates discontinuous radio resources to the user terminal 2 . When receiving the allocation information of discontinuous wireless resources, the user terminal 2 determines that the other user terminal 3 is transmitting the UL control signal, performs one of puncturing processing and coding rate adjustment processing, and transmits the UL data signal to Wireless base station 1. On the other hand, when receiving continuous radio resource allocation information, the user terminal 2 determines that the other user terminal 3 has not transmitted the UL control signal, does not perform puncturing processing and coding rate adjustment processing, and converts the UL data to The signal is sent to wireless base station 1. Hereinafter, differences from the first embodiment will be described.

FIG. 11 is a diagram explaining an operation example of the wireless communication system according to the second embodiment. Processing S21 shown in FIG. 11 shows an example of processing by the wireless base station 1 shown in FIG. 1 . Process S22 shows an example of processing by the user terminals 2 and 3 .

Resource information (information on the band of the UL control signal) is set individually for each user terminal 2 and 3 . That is, the resource information may be different in each of the user terminals 2 and 3, and may be the same in the user terminals 2 and 3. For example, the resource information may be changed every time DCI is transmitted.

The following describes a case where the user terminal 2 transmits a UL data signal and the user terminal 3 transmits a UL control signal.

When the user terminal 3 does not transmit the UL control signal, the radio base station 1 allocates band-continuous radio resources to the UL data signal of the user terminal 2 (S21). Furthermore, when the user terminal 3 transmits the UL control signal, the radio base station 1 allocates wireless resources with discontinuous bands to the UL data signal of the user terminal 2 (S21). The allocation information of radio resources may be notified using DCI, for example.

Here, the case where the user terminal 2 transmits the UL data signal to the radio base station 1 and the user terminal 3 transmits the UL control signal to the radio base station 1 will be described.

If the radio resource allocation of the UL data signal notified by DCI is continuous, the user terminal 2 determines that the other user terminal 3 has not transmitted the UL control signal, and does not perform puncturing processing or coding rate adjustment processing (S22) . On the other hand, when the allocation of radio resources for the UL data signal notified by DCI is discontinuous, the user terminal 2 determines that another user terminal 3 is transmitting the UL control signal, and performs puncturing processing or coding rate adjustment processing. (S22).

FIG. 12 is a diagram showing an example of bands allocated to UL data signals and UL control signals. The bandwidth W5a shown in FIG. 12 represents the band of the UL data signal allocated to the user terminal 2. The information about the bandwidth W5a is notified from the wireless base station 1 to the user terminal 2 through DCI, for example.

The bandwidth W5b indicates the band of the UL control signal allocated to the user terminal 3. The information about the bandwidth W5b is notified from the wireless base station 1 to the user terminal 3 through DCI, for example.

When the UL control signal of the user terminal 3 is allocated to the radio resource as indicated by the bandwidth W5b, the allocation of radio resources for the UL data signal of the user terminal 2 becomes discontinuous as indicated by the bandwidth W5a. For example, the UL data signal of the user terminal 2 is allocated to wireless resources discontinuously so as not to interfere with the UL control signal of the user terminal 3 .

When the UL data signal of the user terminal 2 is allocated to radio resources discontinuously, the encoding/modulation unit 37 performs one of puncturing processing or coding rate adjustment processing as explained in FIGS. 8 and 9 . Then, the mapping unit 38 maps the UL data signal to a wireless resource in a band different from the band indicated by the resource information.

As described above, the resource information is set individually in the user terminals 2 and 3 and is included in the DCI including the uplink scheduling information. When the scheduling information included in the DCI includes information indicating that the radio resources of the UL data signal are discontinuous, mapping unit 38 maps the UL data signal to radio resources in a band different from the band indicated by the resource information. Through this processing, the user terminal 2 can suppress interference between the UL data signal and the UL control signal. Moreover, UL control information can be allocated to wireless resources more flexibly.

(Third Embodiment)

In the third embodiment, even when other user terminals 3 do not transmit the UL control signal, when the transmission timing of the UL data signal overlaps with the transmission timing allocated to other user terminals 3, the UL data signal is transmitted. The user terminal 2 of the data signal also maps the UL data signal to a radio resource different from the radio resource indicated by the resource information. Differences from the first embodiment will be described below.

FIG. 13 is a diagram explaining an operation example of the wireless communication system according to the third embodiment. An example of radio resources of the user terminal 2 is shown in FIG. 13 .

Radio resources A1 to A3 shown in FIG. 13 represent radio resources to which UL control signals can be allocated. That is, when transmitting the UL control signal, the user terminal 3 allocates the UL control signal to the radio resources A1 to A3 and transmits the UL control signal. Furthermore, if there is no UL control signal to be transmitted to the radio base station 1 at the timing of the radio resources A1 to A3, the user terminal 3 does not transmit the UL control signal.

As described in the first embodiment, the radio base station 1 notifies the user terminals 2 and 3 of the resource information of the UL control signal through, for example, RRC, S1 connection setting, MIB, SIB, RA response, paging message, etc. Therefore, the user terminal 2 can recognize the radio resources A1 to A3 of the UL control signal transmitted by the other user terminal 3 . Furthermore, since the resource information is common to the user terminals 2 and 3, the user terminal 2 also uses the radio resources A1 to A3 when transmitting the UL control signal. Furthermore, when the resource information is not notified, the user terminals 2 and 3 may use the resource information determined in advance in the specification or the last set resource information.

Even if the other user terminal 3 does not transmit the UL control signal at the transmission timing of the radio resources A1 to A3 allocated based on the resource information, the transmission timing of the UL data signal overlaps with the transmission timing of the radio resources A1 to A3. In the case of , the mapping unit 38 of the user terminal 2 also maps the UL data signal to the radio resource in a band different from the band indicated by the resource information.

For example, it is assumed that the other user terminal 3 transmits the UL control signal in the radio resource A2, but does not transmit the UL control signal in the radio resources A1 and A3. In this case, the UL control signal is not transmitted at the transmission timing T1 that overlaps with the transmission timing of the radio resource A1, but the mapping unit 38 allocates the UL data signal to radio resources other than the radio resource A1. Furthermore, at the transmission timing T2 that overlaps with the transmission timing of the radio resource A2, the mapping unit 38 allocates the UL data signal to radio resources other than the radio resource A2. Furthermore, at the transmission timing T3 that overlaps with the transmission timing of the radio resource A3, the UL control signal is not transmitted, but the mapping unit 38 allocates the UL data signal to radio resources other than the radio resource A3.

Coding/modulation section 37 performs either puncturing processing or coding rate adjustment processing at transmission timings T1 to T3. Through this process, the user terminal 2 can suppress a decrease in the throughput of the UL data signal at the transmission timings T1 to T3.

Furthermore, encoding/modulation section 37 does not perform puncturing processing or coding rate adjustment processing at timings other than transmission timings T1 to T3.

As described above, even when the other user terminal 3 does not transmit the UL control signal, when the transmission timing of the UL data signal overlaps with the transmission timing allocated to the other user terminal 3, the user terminal 2 The mapping unit 38 also maps the UL data signal to a wireless resource different from the wireless resource indicated by the resource information. Through this processing, the user terminal 2 can suppress interference between the UL data signal and the UL control signal.

Furthermore, in the above description, it is assumed that the resource information is notified to the user terminals 2 and 3 through RRC, MIB, or SIB, etc., but the resource information may also be notified to the user terminals 2 and 3 through DCI or the like.

(Fourth Embodiment)

When the UL control signal is transmitted, the radio resource of the UL data signal is reduced by the amount of the band of the UL control signal. In the fifth embodiment, the user terminal 2 that transmits the UL data signal increases the power spectral density of the radio resource to which the UL data signal is allocated.

The RF transmission and reception unit 32 of the user terminal 2 determines the transmission power of the UL data signal based on the following equation (1), for example.

P _PUSCH ＝10log ₁₀ (M _PUSCH )+P _{O_PUSCH} +α·PL+Δ _TF (TF(i))+f(i) (1)

Here, P _PUSCH is the transmission power of the RF transmission and reception unit 32 . M _PUSCH is the number of RBs allocated to the wirelessly transmitted UL data signal. P _{O_PUSCH} is the target received power when the propagation loss is set to 0. α is a weight coefficient of fractional TPC (Transmission Power Control (TPC)). PL is a measured value of propagation loss. Δ _TF (TF(i)) is the offset in timing TF(i) that depends on the MCS (modulation/coding scheme). f(i) is the correction value at timing i based on TPC or extended TPC.

The number of RBs allocated to the UL data signal is set to 50RB. When puncturing is 2 RBs (the number of RBs allocated to the UL control signal is 2 RBs), if M _PUSCH is set to 50 RBs, RF transmitting and receiving unit 32 can increase the power spectral density of the UL data signal.

RF transmission and reception unit 32 may correct the transmission power of the UL data signal shown in equation (1) based on the number of RBs allocated to the UL data signal and the number of RBs allocated to the UL control signal.

FIG. 14 is a table showing an example of the relationship between the number of RBs allocated to the UL data signal, the number of RBs allocated to the UL control signal, and correction values. For example, the number of RBs allocated to the UL data signal is set to 25, and the number of RBs allocated to the UL control signal is set to 2. In this case, the correction value X becomes 0.3 according to the table shown in FIG. 14 .

The following equation (2) represents an equation including the correction value X.

P _PUSCH ＝10log ₁₀ (M _PUSCH )+P _{O_PUSCH} +α·PL+Δ _TF (TF(i))+f(i)+X (2)

Equation (2) has a correction term X relative to Equation (1). The correction term X is obtained from the table shown in FIG. 14 . Furthermore, the table shown in FIG. 14 may be stored in a storage unit (not shown in FIG. 7 ) of the user terminal 2, or may be notified through S1 connection setting, MIB, SIB, RA response, paging message, or the like. By introducing the correction term X, the RF transmitting and receiving unit 32 can perform power control taking ACLR (Adjacent Channel Leakage Ratio) into consideration.

As described above, even if the RBs of the UL data signal are reduced by the RB amount of the UL control signal, the RF transmitting and receiving unit 32 determines the transmission power of the UL data signal using the number of RBs of the UL data signal before the RBs are reduced. Through this process, the throughput of the user terminal 2 is improved.

Furthermore, RF transmission and reception unit 32 corrects the determined transmission power based on the number of RBs allocated to the UL data signal and the number of RBs allocated to the UL control signal. Through this processing, RF transmitting and receiving unit 32 can perform power control taking ACLR into consideration.

Furthermore, the above-described transmission power control can be applied to the first to fourth embodiments.

Each embodiment has been described above.

(hardware structure)

In addition, the block diagrams used in the description of the above embodiments represent blocks of functional units. These functional blocks (structural units) are implemented by any combination of hardware and/or software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block may be implemented by one device that is physically and/or logically coupled, or it may be implemented by two or more devices that are physically and/or logically separated, directly and/or indirectly (for example, using Wired and/or wireless) connections are implemented using these multiple devices.

For example, each device of the wireless communication system in one embodiment of the present invention can function as a computer that performs the processing of the present invention. FIG. 15 is a diagram showing an example of the hardware configuration of a wireless base station and a user terminal according to an embodiment of the present invention. Each of the devices described above can 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.

In addition, in the following description, the word "device" can be replaced with a circuit, a device, a unit, etc. The hardware configuration of the wireless base station and the user terminal may be configured to include one or more of the devices shown in the figures, or may be configured not to include some of the devices.

For example, only one processor 1001 is shown in the figure, but there may be multiple processors. In addition, the processing may be executed by one processor, or the processing may be executed by more than one processor simultaneously, sequentially, or using other methods. In addition, the processor 1001 may be implemented by one or more chips.

Each function in each device is realized, for example, by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and causing the processor 1001 to perform calculations and control communication via the communication device 1004, or Controls the reading and/or writing of data in the memory 1002 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing device (Central Processing Unit (CPU: Central Processing Unit)) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the above block example is implemented by processor 1001.

In addition, the processor 1001 reads programs (program codes), software modules, or data from the storage 1003 and/or the communication device 1004 to the memory 1002, and performs various processes based on them. As the program, a program that causes the computer to execute at least part of the operations described in the above embodiments is used. For example, the functional blocks constituting at least part of each device can be realized by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks can also be realized in the same way. The various processes described above are executed by one processor 1001, but they may also be executed by two or more processors 1001 simultaneously or sequentially. The processor 1001 may also be implemented by more than one chip. Furthermore, the program can also be sent from the network via electrical communication lines.

The memory 1002 is a computer-readable recording medium, and may also be composed of, for example, a ROM (ReadOnly Memory), an EPROM (Erasable Programmable ROM), or an EEPROM (Electrically Erasable Memory). It is composed of at least one of programming read-only memory (Electrically EPROM) and RAM (Random Access Memory). The memory 1002 may also be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store executable programs (program codes), software modules, and the like for implementing each device according to an embodiment of the present invention.

The storage 1003 is a computer-readable recording medium, and may be, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard drive, a flexible disk, an optical disk (for example, a compact disk, It is composed of at least one of a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a "floppy (registered trademark)" disk, a magnetic tape, or the like. The storage 1003 may also be called an auxiliary storage device. The above-mentioned storage medium may also be, for example, a database including the memory 1002 and/or the storage 1003, a server, or other appropriate media.

The communication device 1004 is hardware (transmitting and receiving equipment) used for 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, etc.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. In addition, the input device 1005 and the output device 1006 may have an integrated structure (for example, a touch panel).

In addition, each device such as the processor 1001 or the memory 1002 is connected through a bus 1007 for information communication. The bus 1007 may be configured as a single bus or may be configured as different buses between devices.

In addition, each device may include a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (field It is composed of hardware such as Programmable Gate Array (FieldProgrammable Gate Array), and part or all of each functional block can also be implemented by this hardware. For example, the processor 1001 may also be implemented by at least one of these hardware.

(Notification of information, signaling)

In addition, notification of information is not limited to the manner/implementation described in this specification, and may be performed by other methods. For example, the information may be notified through physical layer signaling (for example, DCI (Downlink Control Information)), UCI (Uplink Control Information (Uplink Control Information))), higher layer signaling (for example, RRC (Radio Resource Control (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (Master Information Block (MIB: MasterInformation Block), SIB (System Information Block) ), etc.), other signals, or a combination thereof. In addition, RRC signaling may be called an RRC message, for example, it may also be an RRC Connection Setup (RRCConnection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, etc.

(Adaptive system)

Each method/implementation described in this specification can also be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access (Future Radio Access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802 .20. UWB (Ultra-WideBand), Bluetooth (registered trademark), systems utilizing other appropriate wireless communication methods and/or next-generation systems expanded based on them.

(Processing steps, etc.)

In addition, the order of the processing procedures, timings, flowcharts, etc. of each mode/implementation described in this specification may be reversed as long as there is no contradiction. For example, regarding the method described in this specification, elements of various steps are presented in an exemplary order and are not limited to the specific order presented.

(Operation of base station)

In this specification, a specific operation performed by a base station (wireless base station) may also be performed by its upper node (upper node) depending on the situation. It goes without saying that in a network composed of one or more network nodes having a base station, various operations performed for communicating with a terminal can be performed by the base station and/or other network nodes other than the base station. (For example, MME (Mobility Management Entity) or S-GW (Serving Gateway), etc. are thought of, but are not limited to them). The above example illustrates the case where there is one other network node other than the base station, but it may also be a combination of multiple other network nodes (for example, MME and S-GW).

(direction of input and output)

Information, signals, etc. can be output from a higher layer (or lower layer) to a lower layer (or higher layer). It can also be input and output via multiple network nodes.

(Processing of input and output information, etc.)

Input and output information, etc. can be stored in a specific area (for example, a memory) or managed using a management table. Information input and output can also be overwritten, updated or added. Outputted information, signals, etc. can also be deleted. Input information, signals, etc. can also be sent to other devices.

(Measure to judge)

The determination can be made by a value represented by 1 bit (0 or 1), by a true or false value (boolean: true or false), or by a comparison of numerical values (e.g. , compared with the specified value).

(software)

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, shall be construed broadly to mean instructions, instruction set, code, code segment, program code, program, subroutine Program, software module, application, software application, software package, routine, subroutine, object, executable file, thread of execution, procedure, function, etc.

In addition, software, instructions, etc. may be sent and received via transmission media. For example, where the Software is delivered from a website, server, or other remote source using wired technology such as coaxial cable, fiber optic cable, twisted pair, and Digital Subscriber Line (DSL), and/or wireless technology such as infrared, microwave, etc., These wired and/or wireless technologies are included in the definition of transmission medium.

(information, signal)

The information, signals, etc. described in this specification may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that can be mentioned throughout the above description can also be composed of voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or they represented by any combination of .

In addition, terms described in this specification and/or terms necessary for understanding this specification may be replaced with terms having the same or similar meaning. For example, channels and/or symbols can also be signals (signaling). Additionally, signals can also be messages. In addition, a component carrier (CC) may also be called a carrier frequency, a cell, etc.

("System", "Network")

The words "system" and "network" used in this manual are used interchangeably.

(name of parameter, channel)

In addition, the information, parameters, etc. described in this specification may be expressed using absolute values, may be expressed using relative values with respect to predetermined values, or may be expressed using other corresponding information. For example, wireless resources can also be indicated by indexes.

The names used for the above-mentioned parameters, etc. are not limiting names at any point. Furthermore, formulas using these parameters may differ from those explicitly disclosed in this specification. For example, various channels (for example, PUCCH, PDCCH, etc.) and information elements (for example, TPC, etc.) can be identified by any preferred names, so various channels and information elements are assigned various The name is not limiting in any way.

(base station)

A base station (radio base station) can accommodate one or more (for example, three) cells (also called sectors). In the case where a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also be configured through a base station subsystem (for example, a small base station for indoor use (long-range wireless Remote Radio Head (RRH: Remote Radio Head) to provide communication services. Terms such as "cell" or "sector" refer to part or all of the coverage area of a base station and/or base station subsystem that performs communication services within its coverage area. Furthermore, the terms "base station", "eNB", "cell", and "sector" are used interchangeably in this specification. A base station is sometimes also called a fixed station (fixed station), NodeB, eNodeB (eNB), or access point. Terms such as access point, femtocell, small cell, etc.

(terminal)

User terminals are sometimes also referred to by those skilled in the art as mobile stations, subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communications devices, remote devices, mobile subscriber stations, access terminals, Mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, UE (User Equipment), or some other appropriate term.

(Meaning and explanation of terms)

The terms "determining" and "determining" used in this specification may include various operations. For example, "judging" and "deciding" may also include judging, calculating, computing, processing, deriving, investigating, and looking up. (For example, retrieval in tables, databases or other data structures), confirmation (ascertaining), etc. are deemed to be "judgments" and "decisions". In addition, "judgment" and "decision" may also include receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (accessing). ) (for example, accessing data in memory) is deemed to have made a "judgment" or "decision". In addition, "judgment" and "decision" may also include "resolving", selecting, choosing, establishing, comparing, etc. as "judgment", "Decide". That is, "judgment" and "decision" may also include treating any operation as "judgment" or "decision".

The terms "connected", "coupled" or any variations thereof refer to all direct or indirect connections or couplings between two or more elements, which can be included in the mutual "connection" Or when there is one or more intermediate elements between two "coupled" elements. The coupling or connection between elements can be physical, logical, or a combination thereof. As used in this specification, two elements may be considered to be "connected" or "coupled" to each other through the use of more than one wire, cable, and/or printed electrical connection, and as certain non-limiting and non-limiting As a general example, two elements are "connected" or "coupled" to each other by using electromagnetic energy such as electromagnetic energy having wavelengths in the wireless frequency domain, the microwave domain, and the light (both visible light and invisible light) range.

The reference signal can also be called RS (Reference Signal) for short, or it can also be called pilot (Pilot) based on the applied standard. Furthermore, the correction RS may also be called TRS (Tracking RS), PC-RS (Phase Compensation RS), PTRS (Phase Tracking RS), or Additional RS (Additional RS). ). Furthermore, the RS for demodulation and the RS for correction may be called in other ways corresponding to each other. Furthermore, the RS for demodulation and the RS for correction may be specified with the same name (for example, demodulation RS).

The expression "based on" used in this specification does not mean "based solely on" unless otherwise expressly stated. In other words, the description "based on" means both "based on" and "based on at least".

The "part" in the structure of each device described above may be replaced with "unit", "circuit", "device", etc.

Whenever "include", "including" and their variations are used in this specification or claims, these terms are the same as the term "comprising" and are meant to be inclusive. Furthermore, the term "or" used in this specification or the claims does not mean logical exclusive-OR.

A wireless frame can also be composed of one or more frames in the time domain. One or more frames in the time domain may also be called subframes, time units, etc. Furthermore, a subframe may also be composed of one or more time slots in the time domain. Furthermore, the time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA (Single Carrier-FDMA)) in the time domain. FrequencyDivision Multiple Access)) code elements, etc.).

Wireless frames, subframes, time slots, and symbols all represent time units when transmitting signals. Wireless frames, subframes, time slots, and symbols may also be called other names corresponding to each other.

For example, in the LTE system, the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each mobile station) to each mobile station. The minimum time unit of scheduling can also be called transmission time interval (TTI (Transmission Time Interval)).

For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, and one time slot may be called a TTI.

A resource unit is a resource allocation unit in the time domain and frequency domain, and may also include one or more continuous subcarriers (subcarriers) in the frequency domain. In addition, the time domain of the resource unit may contain one or more symbols, and may also be 1 time slot, 1 subframe or 1 TTI length. 1TTI and 1 subframe may each be composed of one or more resource units. Furthermore, the resource unit may be called a resource block (PRB: Physical RB), a physical resource block (PRB: PhysicalRB), a PRB pair, an RB pair, a scheduling unit, a frequency unit, or a subband. Furthermore, a resource unit may be composed of one or more REs. For example, 1RE only needs to be a smaller unit of resource (for example, the smallest resource unit) than the resource unit used as the resource allocation unit, and is not limited to the name RE.

In addition, the above-mentioned structure of the radio frame is just an example. The number of subframes included in the radio frame, the number of time slots included in the subframe, the number of symbols and resource blocks included in the time slot, and the number of The number of subcarriers included in a resource block can be varied variously.

In the present disclosure as a whole, where articles are appended by translation, for example, as in English a, an, and the, these articles include plural articles unless it is indicated that these articles are evident from the context that is not the case. indivual.

(Deformation of form, etc.)

Each of the methods/embodiments described in this specification can be used individually, in combination, or switched with execution. In addition, notification of predetermined information (for example, notification of "X") is not limited to being performed explicitly, and may be performed implicitly (for example, notification of the predetermined information is not performed).

The present invention has been described in detail above. However, it will be obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and modified modes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description in this specification is for the purpose of illustrating the invention and does not have any limiting meaning on the present invention.

Industrial availability

One aspect of the invention is useful for mobile communication systems.

Label description

1 wireless base station

2, 3 user terminals

21 control unit

22 Transmit signal generation unit

23 Coding/Modulation Unit

24 mapping units

25 RF transmitting unit

26, 31 antenna

32 RF sending and receiving unit

33 Demapping unit

34 channel estimation unit

35 demodulation/decoding unit

36 Transmit signal generation unit

37 Coding/Modulation Unit

38 mapping units

Claims (5)

1. A user terminal that performs wireless communication with a wireless base station and has: A receiving unit that receives downlink control signals and resource information representing wireless resources of uplink control signals sent by other user terminals; The control unit determines whether the other user terminal sends the uplink control signal based on the downlink control signal; A mapping unit, when the other user terminal sends the uplink control signal, maps the uplink data signal to a radio resource different from the radio resource indicated by the resource information; and A sending unit, configured to send the uplink data signal mapped to wireless resources. 2. User terminal as claimed in claim 1, It also has a processing unit that performs puncturing processing on the uplink data signal by puncturing the signal allocated to the wireless resource indicated by the resource information, and adjusts the coding rate so that the uplink data signal is mapped One of the processes of wireless resources other than the wireless resources indicated by the resource information. 3. The user terminal according to claim 1 or 2, Each user terminal receives the individually set resource information, When the uplink scheduling information includes information indicating that the radio resources of the uplink data signal are discontinuous, the mapping unit maps the uplink data signal to a radio resource different from the radio resource indicated by the resource information. resource. 4. The user terminal according to claim 1 or 2, Even if the other user terminal does not transmit the uplink control signal, the transmission timing of the uplink data signal coincides with the transmission timing of the uplink control signal assigned to the other user terminal. Next, the mapping unit also maps the uplink data signal to a radio resource different from the radio resource indicated by the resource information. 5. A wireless communication method, which is a wireless communication method for a user terminal that performs wireless communication with a wireless base station, in which method, receiving downlink control signals and resource information indicating wireless resources of uplink control signals sent by other user terminals, Based on the downlink control signal, determine whether the other user terminal sends the uplink control signal, When the other user terminal sends the uplink control signal, map the uplink data signal to a radio resource different from the radio resource indicated by the resource information, The uplink data signal mapped to the wireless resource is sent.