WO2021261199A1 - Communication device - Google Patents

Abstract

This communication device comprises a control unit for mapping signals belonging to two or more information sources in one symbol time of a single carrier system, and a transmission unit for transmitting a signal in which the signals belonging to two or more information sources are mapped.

Description

Communication device

The present disclosure relates to a communication device that executes wireless communication, particularly a communication device that executes signal communication by a single carrier method.

The 3rd Generation Partnership Project (3GPP) specifies the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and next-generation specifications called Beyond 5G, 5G Evolution or 6G. We are also proceeding with the conversion.

In 3GPP Release 15, OFDM (Orthogonal Frequency Domain Multiplexing) is used for downlink signals, and SC-FDMA (Single Carrier Frequency Division Multiple Access) is used for uplink signals (and side link signals). SC-FDMA may be simply referred to as a single carrier system.

In the next-generation specifications, the use of high frequency bands exceeding 52.6 GHz and the expansion of coverage areas including the sky, sea, and space (ultra-coverage expansion) are being considered. In such a usage scene, it is assumed that coverage or power efficiency is more important than frequency utilization efficiency, and further studies on the use of the single carrier method described above are required.

Therefore, the following disclosure was made in view of such a situation, and an object is to provide a communication device capable of appropriately executing signal communication by a single carrier method.

One aspect of the present disclosure is a communication device, in which a control unit that maps signals belonging to two or more information sources and signals belonging to the two or more information sources are mapped in one symbol time of a single carrier system. The gist is to provide a transmitter for transmitting the signal.

One aspect of the present disclosure is a communication device, which belongs to a receiving unit that receives a signal to which signals belonging to two or more information sources are mapped in one symbol time of a single carrier system, and a receiving unit belonging to the two or more information sources. The gist is to provide a control unit for demapping the signal.

FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10. FIG. 2 is a diagram showing a frequency range used in the wireless communication system 10. FIG. 3 is a diagram showing a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10. FIG. 4 is a functional block configuration diagram of the UE 200. FIG. 5 is a functional block configuration diagram of the communication device 300 (transmitting side). FIG. 6 is a functional block configuration diagram of the communication device 400 (reception side). FIG. 7 is an example of mapping of signals belonging to two or more information sources. FIG. 8 is an example of mapping of signals belonging to two or more sources. FIG. 9 is a flow chart showing the operation of the communication device 300. FIG. 10 is a flow chart showing the operation of the communication device 400. FIG. 11 is an example of mapping of two or more control signals according to the modification example 1. FIG. 12 is a diagram showing an example of the hardware configuration of the communication device 300 and the communication device 400.

Hereinafter, embodiments will be described based on the drawings. The same functions and configurations are designated by the same or similar reference numerals, and the description thereof will be omitted as appropriate.

[Embodiment]
(1) Overall Schematic Configuration of Wireless Communication System FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the embodiment. The wireless communication system 10 is a wireless communication system according to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN20, and a terminal 200 (hereinafter, UE200)).

The wireless communication system 10 may be a wireless communication system according to a method called Beyond 5G, 5G Evolution or 6G.

NG-RAN20 includes a radio base station 100A (hereinafter, gNB100A) and a radio base station 100B (hereinafter, gNB100B). The specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.

The NG-RAN20 actually contains multiple NG-RANNodes, specifically gNB (or ng-eNB), and is connected to a core network (5GC, not shown) according to 5G. In addition, NG-RAN20 and 5GC may be simply expressed as "network".

GNB100A and gNB100B are radio base stations according to 5G, and execute wireless communication according to UE200 and 5G. gNB100A, gNB100B and UE200 are Massive MIMO (Multiple-Input Multiple-Output) and multiple component carriers (CC) that generate beam BM with higher directivity by controlling radio signals transmitted from multiple antenna elements. ) Can be bundled and used for carrier aggregation (CA), and dual connectivity (DC) for simultaneously communicating with two or more transport blocks between the UE and each of the two NG-RAN Nodes.

In addition, the wireless communication system 10 supports a plurality of frequency ranges (FR). FIG. 2 shows the frequency range used in the wireless communication system 10.

As shown in FIG. 2, the wireless communication system 10 corresponds to FR1 and FR2. The frequency bands of each FR are as follows.

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

SCS may be interpreted as numerology. Numerology is defined in 3GPP TS38.300 and corresponds to one subcarrier interval in the frequency domain.

Furthermore, the wireless communication system 10 also supports a higher frequency band than the FR2 frequency band. Specifically, the wireless communication system 10 corresponds to a frequency band exceeding 52.6 GHz and up to 114.25 GHz. Such a high frequency band may be referred to as "FR2x" for convenience.

To solve this problem, when using a band exceeding 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-) with a larger Sub-Carrier Spacing (SCS) S-OFDM) may be applied.

FIG. 3 shows a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10.

As shown in FIG. 3, one slot is composed of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). The SCS is not limited to the interval (frequency) shown in FIG. For example, 480 kHz, 960 kHz, etc. may be used.

Further, the number of symbols constituting one slot does not necessarily have to be 14 symbols (for example, 28, 56 symbols). In addition, the number of slots per subframe may vary from SCS to SCS.

The time direction (t) shown in FIG. 3 may be referred to as a time domain, a symbol period, a symbol time, or the like. Further, the frequency direction may be referred to as a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP: BandwidthPart), or the like.

(2) Functional block configuration of the wireless communication system Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block configuration of UE200 will be described.

FIG. 4 is a functional block configuration diagram of UE200. As shown in FIG. 4, the UE 200 includes a radio signal transmission / reception unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, a coding / decoding unit 250, a data transmission / reception unit 260, and a control unit 270. ..

The radio signal transmission / reception unit 210 transmits / receives a radio signal according to NR. The radio signal transmission / reception unit 210 corresponds to Massive MIMO, a CA that bundles a plurality of CCs, and a DC that simultaneously communicates between the UE and each of the two NG-RAN Nodes.

The amplifier unit 220 is composed of PA (Power Amplifier) / LNA (Low Noise Amplifier) and the like. The amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. Further, the amplifier unit 220 amplifies the RF signal output from the radio signal transmission / reception unit 210.

The modulation / demodulation unit 230 executes data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB100 or other gNB). Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-S-OFDM) may be applied to the modulation / demodulation unit 230. Further, the DFT-S-OFDM may be used not only for the uplink (UL) but also for the downlink (DL).

The control signal / reference signal processing unit 240 executes processing related to various control signals transmitted / received by the UE 200 and processing related to various reference signals transmitted / received by the UE 200. The

Specifically, the control signal / reference signal processing unit 240 receives various control signals transmitted from the gNB 100 via a predetermined control channel, for example, control signals of the radio resource control layer (RRC). Further, the control signal / reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel.

The control signal / reference signal processing unit 240 executes processing using a reference signal (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).

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

In addition to DMRS and PTRS, the reference signal may include ChannelStateInformation-ReferenceSignal (CSI-RS), SoundingReferenceSignal (SRS), and PositioningReferenceSignal (PRS) for location information.

Further, the channel includes a control channel and a data channel. Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel), Random Access Radio Network Temporary Identifier (RA-RNTI), Downlink Control Information (DCI), and Physical Broadcast Channel (PBCH) etc. are included.

The data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel). Data means data transmitted over a data channel. The data channel may be read as a shared channel.

The coding / decoding unit 250 executes data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB100 or other gNB).

Specifically, the coding / decoding unit 250 divides the data output from the data transmission / reception unit 260 into predetermined sizes, and executes channel coding for the divided data. Further, the coding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230, and concatenates the decoded data.

The data transmission / reception unit 260 executes transmission / reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmitter / receiver 260 is a PDU / SDU in multiple layers (such as a medium access control layer (MAC), a wireless link control layer (RLC), and a packet data convergence protocol layer (PDCP)). Assemble / disassemble the. Further, the data transmission / reception unit 260 executes data error correction and retransmission control based on the hybrid ARQ (Hybrid automatic repeat request).

The control unit 270 controls each functional block constituting the UE 200. For example, the control unit 270 may execute control to receive a signal including an OFDM-applied symbol (hereinafter, OFDM symbol) as a downlink signal, and may execute a control to which SC-FDMA is applied (hereinafter, SC-). Control to transmit a signal including FDMA symbol) as an uplink signal may be executed. In the embodiment, the control unit 270 may execute control to receive a signal including the SC-FDMA symbol as a downlink signal.

(3) Single carrier method The single carrier method (SC-FDMA method) according to the embodiment will be described below. In the prior art, signals belonging to one source are mapped in one symbol time of the single carrier system. On the other hand, in the embodiment, signals belonging to two or more information sources are mapped in one symbol time of the single carrier system. In the following, the explanation will be continued focusing on the SC-FDMA method. SC-FDMA according to an embodiment may be applied to an uplink signal or a downlink signal.

(3.1) Communication device (sender)
FIG. 5 is a functional block configuration diagram of the communication device 300 (transmitting side) according to the embodiment. For example, gNB100 is used as the communication device 300 for the downlink signal, and UE200 is used as the communication device 300 for the uplink signal. As shown in FIG. 5, the communication device 300 includes a multiplexer 320, a DFT unit 330, a mapping unit 340, an IFFT unit 350, a CP addition unit 360, and a transmission unit 370.

The multiplexer 320 multiplexes the signal sequences acquired from two or more information sources 310 (information source 310A and information source 310B in FIG. 5). Specifically, the multiplexer 320 applies time division multiplexing to signal sequences obtained from two or more sources 310. The signal sequence may be a sequence of modulated signals.

In the embodiment, the multiplexer 320 constitutes a control unit that time-divisions multiplexes data belonging to two or more information sources 310 before mapping to one symbol is executed. Taking UE200 shown in FIG. 4 as an example, the multiplexer 320 may be composed of a modulation / demodulation unit 230 and a control unit 270.

The DFT unit 330 applies DFT (Discrete Fourier Transform) to the signal sequence obtained by time-division multiplexing, and converts the signal sequence in the time domain into the signal sequence in the frequency domain.

The mapping unit 340 maps the signal sequence obtained by the DFT in one symbol time of the single carrier system. Specifically, when a single carrier is composed of two or more subcarriers (for example, 12 subcarriers), the mapping unit 340 maps the signal obtained by the DFT to each subcarrier. Here, since the signal sequence obtained by the DFT is a signal sequence in which signals belonging to two or more information sources 310 are time-division-multiplexed, the signal sequence mapped to the subcarrier by the mapping unit 340 is one. Includes signals belonging to two or more sources 310 in symbol time.

In the embodiment, the mapping unit 340 constitutes a control unit that maps signals belonging to two or more information sources 310 in one symbol time of the single carrier system. Taking UE200 shown in FIG. 4 as an example, the mapping unit 340 may be composed of a modulation / demodulation unit 230 and a control unit 270.

The IFFT unit 350 applies IFFT (Inverse Fast Fourier Transform) to the signal sequence acquired from the mapping unit 340, and converts the signal sequence in the frequency domain into the signal sequence in the time domain.

CP addition unit 360 adds CP (Cyclic Prefix) to the beginning of the signal output from IFFT unit 350 (hereinafter, SC-FDMA symbol).

The transmission unit 370 transmits a signal to which CP is added as a transmission signal.

In the embodiment, the transmission unit 370 constitutes a transmission unit that transmits a signal to which signals belonging to two or more information sources 310 are mapped. Taking the UE 200 shown in FIG. 4 as an example, the transmission unit 370 may be configured by the radio signal transmission / reception unit 210.

(3.2) Communication device (reception side)
FIG. 6 is a functional block configuration diagram of the communication device 400 (reception side) according to the embodiment. For example, the UE 200 is used as the communication device 400 for the downlink signal, and the gNB 100 is used as the communication device 400 for the uplink signal. As shown in FIG. 6, the communication device 400 includes a receiving unit 410, a CP removing unit 420, a DFT unit 430, a demapping unit 440, an IFFT unit 450, and a demultiplexer unit 460.

The receiving unit 410 receives the signal transmitted from the communication device 300.

In the embodiment, the receiving unit 410 constitutes a receiving unit that receives a signal to which signals belonging to two or more information sources 470 (corresponding to the information source 310 shown in FIG. 5) are mapped in one symbol time of the single carrier system. do. Taking UE200 shown in FIG. 4 as an example, the receiving unit 410 may be configured by the radio signal transmitting / receiving unit 210.

The CP removing unit 420 removes the CP from the signal received by the receiving unit 410.

The DFT unit 430 applies DFT (Discrete Fourier Transform) to the signal sequence from which the CP has been removed, and converts the signal sequence in the time domain into the signal sequence in the frequency domain.

The demapping unit 440 demapping the signal sequence obtained by the DFT. Specifically, when a single carrier is composed of two or more subcarriers (for example, 12 subcarriers), the demapping unit 440 demaps the signal sequence mapped to each subcarrier. Since the signal sequence obtained by DFT is a signal sequence in which signals belonging to two or more information sources 470 are time-division-multiplexed, the signal sequence demapped to subcarriers is two or more in one symbol time. Includes signals belonging to source 470.

In the embodiment, the demapping unit 440 constitutes a control unit that demaps signals belonging to two or more information sources 470. Taking UE200 shown in FIG. 4 as an example, the demapping unit 440 may be composed of a modulation / demodulation unit 230 and a control unit 270.

The IFFT unit 450 applies IFFT (Inverse Fast Fourier Transform) to the signal sequence acquired from the demapping unit 440, and converts the signal sequence in the frequency domain into the signal sequence in the time domain.

The demultiplexer 460 separates the signal sequence obtained from the IFFT unit 450 into two or more information sources 470 (information source 470A and information source 470B in FIG. 6). Specifically, the demultiplexer 460 applies time division multiplexing to the signal sequence obtained from the IFFT unit 450. The signal sequence may be a sequence of modulated signals.

(3.3) Mapping Example Hereinafter, a mapping example according to the embodiment will be described with reference to FIG. 7. FIG. 7 illustrates a case where an information source A and an information source B exist as information sources. As shown in FIG. 7, the signal belonging to the information source A is a signal sequence such as 00, 11,…, 01, 10,…,…, and the signal belonging to the information source B is 11, 00,…, 10,. It is a signal sequence such as 01,…,…. As for these signal sequences, the signal sequence may be a sequence of signals after modulation.

As described above, the signals belonging to the information source A and the information source B are multiplexed by time division multiplexing (TDM) and then mapped to each subcarrier. In other words, the signals belonging to Source A and Source B are time-division-multiplexed before mapping to one symbol is performed. FIG. 7 illustrates a case where signals belonging to information source A and information source B are alternately mapped in the time domain. As described above, in the embodiment, signals belonging to two or more information sources are mapped within one symbol time.

When the single carrier is composed of two or more subcarriers, the signal belonging to the information source A may be mapped to all the subcarriers, or may be mapped to the subcarriers assigned to the information source A. good. Similarly, the signal belonging to the information source B may be mapped to all the subcarriers, or may be mapped to the subcarriers assigned to the information source B.

Furthermore, FIG. 7 illustrates a case where there are two information sources and the signals belonging to the information sources are alternately mapped in the time domain. However, the embodiments are not limited to this.

For example, as shown in FIG. 8, information source A, information source B, and information source C may exist as information sources. As shown in FIG. 8, in one symbol time, the signal belonging to the information source A is mapped, the signal belonging to the information source B is mapped, the signal belonging to the information source B is mapped, and then the signal belonging to the information source C is mapped. May be mapped. In other words, in one symbol time, the signals belonging to each source may be continuously mapped in the time domain.

(4) Communication method The communication method according to the embodiment will be described below.

First, the process of transmitting a signal in the SC-FDMA system will be described with reference to FIG.

As shown in FIG. 9, in step S10, the communication device 300 multiplexes the signals belonging to two or more information sources 310 in a time division manner.

In step S11, the communication device 300 applies the DFT to the time-division-multiplexed signal.

In step S12, the communication device 300 maps the signal to which the DFT is applied to the subcarrier. Specifically, the communication device 300 maps signals belonging to two or more information sources 310 to one symbol.

In step S13, the communication device 300 applies the IFFT to the signal mapped to the subcarrier.

In step S14, the communication device 300 adds a CP to the signal to which the IFFT is applied.

In step S15, the communication device 300 transmits the signal to which the CP is added as a transmission signal.

Second, the process of receiving a signal in the SC-FDMA system will be described with reference to FIG.

As shown in FIG. 10, in step S20, the communication device 400 receives the signal to which the CP is added as a reception signal. The received signal includes a signal to which signals belonging to two or more information sources 310 are mapped in one symbol time.

In step S21, the communication device 400 removes the CP from the signal received from the communication device 300.

In step S22, the communication device 400 applies the DFT to the signal from which the CP has been removed.

In step S23, the communication device 400 demaps the signal to which the DFT is applied to each subcarrier. The signal to which the DFT is applied includes signals belonging to two or more sources 470.

In step S24, the communication device 400 applies the IFFT to the signal demapped to each subcarrier.

In step S25, the communication device 400 separates signals belonging to two or more information sources from the signal to which IFFT is applied.

(5) Actions and Effects In the embodiment, the communication device 300 transmits a signal to which signals belonging to two or more information sources 310 are mapped in one symbol time. The communication device 400 receives a signal to which signals belonging to two or more information sources 470 are mapped in one symbol time. According to such a configuration, communication resources can be efficiently used even in a case where a signal belonging to one information source does not require one symbol time.

In the embodiment, when the signal belonging to one information source 310 is a signal addressed to one UE200, the signal belonging to two or more information sources 310 may be mapped to the downlink signal in one symbol time. With such a configuration, sparse mapping is realized in the time domain for one UE200 (information source), the time that one UE200 should monitor in one symbol time is reduced, and the processing load of the UE200 is reduced. To.

[Change example 1]
Hereinafter, modification 1 of the embodiment will be described. The differences from the embodiments will be described below.

In modification 1, the communication device 300 maps two or more control signals in one symbol time. Two or more control signals may be considered to be two or more sources 310.

Specifically, as shown in FIG. 11, one slot is composed of 14 symbols. As described above, the number of symbols constituting one slot does not necessarily have to be 14 symbols (for example, 28, 56 symbols).

Here, two or more control signals (control signal A and control signal B in FIG. 11) are mapped in one symbol time. For example, the control signal may be an SS (Synchronization Signal) / PBCH (Physical Broadcast Channel) block. That is, two or more SS / PBCH blocks may be mapped in one symbol time. SS may include PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal).

In change example 1, two or more control signals (for example, SS / PBCH block) are mapped in one symbol time. According to such a configuration, the shortest period in which the control signal appears can be shortened, and the processing using the control signal (for example, precursor switching) can be speeded up.

[Change example 2]
Hereinafter, modification 2 of the embodiment will be described. The differences from the embodiments will be described below.

In the second modification, the communication device 300 may map signals belonging to two or more information sources 310 in one symbol time when a predetermined condition is satisfied.

For example, the predetermined condition may be that the frequency band is equal to or higher than the threshold value. That is, the communication device 300 maps signals belonging to one information source in one symbol time in the first frequency band (for example, frequency bands of 52.6 GHz or less, FR1 and FR2), and is higher than the first frequency band. In the second frequency band (for example, frequency band exceeding 52.6 GHz, FR2x), signals belonging to two or more information sources may be mapped in one symbol time.

Furthermore, the predetermined conditions may be applied to the downlink signal. That is, the communication device 300 maps the signals belonging to one information source to the downlink signal in the first frequency band in one symbol time, and the downlink signal in the second frequency band higher than the first frequency band. Signals belonging to two or more sources may be mapped in one symbol time.

For example, the predetermined condition may be that the SCS is equal to or higher than the threshold value. That is, when the SCS is the first bandwidth, the communication device 300 maps the signals belonging to one information source in one symbol time, and when the SCS is the second bandwidth wider than the first bandwidth. In addition, signals belonging to two or more information sources may be mapped in one symbol time.

Furthermore, the predetermined conditions may be applied to the downlink signal. That is, the communication device 300 maps the signal belonging to one information source in one symbol time to the downlink signal in which the SCS has the first bandwidth, and the SCS has a second bandwidth wider than the first bandwidth. Signals belonging to two or more sources may be mapped to a downlink signal in one symbol time.

For example, the predetermined condition may be that the communication device 300 is required to have a transmission power lower than the threshold value. For example, when the communication device 300 maps a signal belonging to one information source in one symbol time when the first power is required as the transmission power, the second power lower than the first power is required as the transmission power. If so, signals belonging to more than one source may be mapped in one symbol time.

Furthermore, the predetermined conditions may be applied to the downlink signal. That is, when the communication device 300 requests the first power as the transmission power of the downlink signal, the communication device 300 maps the signal belonging to one information source in one symbol time, and the first power is used as the transmission power of the downlink signal. Signals belonging to more than one source may be mapped in one symbol time when lower second power is required.

For example, the predetermined condition may be that the communication device 300 is required to have a coverage area wider than the threshold value. For example, when the first coverage area is required as the coverage area, the communication device 300 maps the signals belonging to one information source in one symbol time, and the second coverage area is wider than the first coverage area as the coverage area. When an area is required, signals belonging to more than one source may be mapped in one symbol time.

Furthermore, the predetermined conditions may be applied to the downlink signal. That is, when the communication device 300 requests the first coverage area as the coverage area of the downlink signal, the communication device 300 maps the signal belonging to one information source in one symbol time, and sets the first coverage area of the downlink signal. When a second coverage area wider than the coverage area is required, signals belonging to two or more sources may be mapped in one symbol time.

The predetermined condition may be that the communication type is mMTC (massive Machine Type Communication). For example, the communication device 300 maps signals belonging to one source in one symbol time when the communication type is not mMTC, and two or more in one symbol time when the communication type is mMTC. Signals belonging to the source may be mapped.

Furthermore, the predetermined conditions may be applied to the downlink signal. That is, the communication device 300 maps signals belonging to one information source in one symbol time when the communication type of the downlink signal is not mMTC, and one when the communication type of the downlink signal is mMTC. Signals belonging to more than one source may be mapped in symbol time.

[Other embodiments]
Although the contents of the present invention have been described above according to the embodiments, it is obvious to those skilled in the art that the present invention is not limited to these descriptions and can be modified and improved in various ways.

In the embodiment, the case where the information sources of the signals mapped in one symbol time are two or three is illustrated. However, the embodiments are not limited to this. The information source may be 4 or more.

The block configuration diagram (FIG. 4) used in the description of the above-described embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't. For example, a functional block (configuration unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter). In each case, as described above, the realization method is not particularly limited.

Further, the above-mentioned communication device 300 and communication device 400 (the device) may function as a computer that processes the wireless communication method of the present disclosure. FIG. 12 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 12, the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the device may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.

Each functional block of the device (see FIG. 4) is realized by any hardware element of the computer device or a combination of the hardware elements.

In addition, each function in the device is such that the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, and controls the communication by the communication device 1004, or the memory. It is realized by controlling at least one of reading and writing of data in 1002 and storage 1003.

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 peripheral devices, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. Further, the various processes described above may be executed by one processor 1001 or may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. Storage 1003 may be referred to as auxiliary storage. The recording medium described above may be, for example, a database, server or other suitable medium containing at least one of the memory 1002 and the storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.

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 an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

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

Furthermore, the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), ApplicationSpecific IntegratedCircuit (ASIC), ProgrammableLogicDevice (PLD), and FieldProgrammableGateArray (FPGA). The hardware may implement some or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.

Further, the notification of information is not limited to the embodiment / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (eg Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (eg RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block)). (MIB), System Information Block (SIB)), other signals or combinations thereof. RRC signaling may also be referred to as an RRC message, eg, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.

Each aspect / embodiment described in the present disclosure includes LongTermEvolution (LTE), LTE-Advanced (LTE-A), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), FutureRadioAccess (FRA), NewRadio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UltraMobile Broadband (UMB), IEEE802.11 (Wi-Fi (registered trademark)) , IEEE802.16 (WiMAX®), IEEE802.20, Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least one of the next-generation systems extended based on them. It may be applied to one. In addition, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

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

In some cases, the specific operation performed by the base station in this disclosure may be performed by its upper node (upper node). In a network consisting of one or more network nodes having a base station, various operations performed for communication with the terminal are the base station and other network nodes other than the base station (eg, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information and signals (information, etc.) can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information may be stored in a specific location (for example, memory) or may be managed using a management table. The input / output information may be overwritten, updated, or added. The output information may be deleted. The input information may be transmitted to another device.

The determination may be made by a value represented by 1 bit (0 or 1), by a true / false value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The information, signals, etc. described in this disclosure 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 referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

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

Further, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those expressly disclosed in this disclosure. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in any respect limited names. is not it.

In this disclosure, "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "Access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "cell group", " Terms such as "carrier" and "component carrier" may be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

A base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a remote radio for indoor use). Communication services can also be provided by Head: RRH).

The term "cell" or "sector" refers to a part or all of the coverage area of at least one of the base station providing communication services in this coverage and the base station subsystem.

In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "user equipment (UE)", and "terminal" may be used interchangeably. ..

Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read as a mobile station (user terminal, the same shall apply hereinafter). For example, communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the mobile station may have the functions of the base station. Further, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the upstream channel, the downstream channel, and the like may be read as a side channel.

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

The wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe.

The subframe may be further composed of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

The numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel. Numerology includes, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval: TTI), number of symbols per TTI, wireless frame configuration, transmission / reception. It may indicate at least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like.

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

The slot may include a plurality of mini slots. Each minislot may be composed of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. The minislot may consist of a smaller number of symbols than the slot. PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may use different names corresponding to each.

For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as TTI, and one slot or one minislot may be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. May be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units. The definition of TTI is not limited to this.

TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

TTI with a time length of 1 ms may be called normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. 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, a slot, and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) may be read as a TTI less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

The resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in RB may be the same regardless of numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs include a physical resource block (Physical RB: PRB), a sub-carrier group (Sub-Carrier Group: SCG), a resource element group (Resource Element Group: REG), a PRB pair, an RB pair, and the like. May be called.

Further, the resource block may be composed of one or a plurality of resource elements (ResourceElement: RE). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

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

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal may also be abbreviated as Reference Signal (RS) and may be referred to as a pilot (Pilot) depending on the applied standard.

The statement "based on" used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

The "means" in the configuration of each of the above devices may be replaced with a "part", a "circuit", a "device", or the like.

Any reference to elements using designations such as "first" and "second" as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.

When "include", "including" and variations thereof are used in the present disclosure, these terms are as inclusive as the term "comprising". Is intended. Moreover, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include the plural nouns following these articles.

The terms "determining" and "determining" used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). It may include (eg, searching in a table, database or another data structure), ascertaining as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as "judgment" or "decision". In addition, "judgment" and "decision" are considered to be "judgment" and "decision" when the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as amendments and modifications without departing from the spirit and scope of the present disclosure as determined by the description of the scope of claims. Therefore, the description of this disclosure is for purposes of illustration and does not have any limiting meaning to this disclosure.

10 Radio communication system 20 NG-RAN
100 gNB
200 UE
210 Radio signal transmission / reception unit 220 Amplifier unit 230 Modulation / demodulation unit 240 Control signal / reference signal processing unit 250 Coding / decoding unit 260 Data transmission / reception unit 270 Control unit 300 Communication device 310 Information source 320 Multiplexer 330 DFT unit 340 Mapping unit 350 IFFT unit 360 CP addition part 370 Transmission part 400 Communication device 410 Reception part 420 CP removal part 430 DFT part 440 Demapping part 450 IFFT part 460 Demultiplexer 470 Information source 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

Claims (5)

1. A control unit that maps signals belonging to two or more information sources in one symbol time of the single carrier method.
   A communication device including a transmission unit for transmitting a signal to which signals belonging to the two or more information sources are mapped.
2. The communication device according to claim 1, wherein the control unit maps two or more control signals in the one symbol time.
3. The communication device according to claim 1 or 2, wherein the control unit multiplexes signals belonging to the two or more information sources by time division before mapping to the one symbol is executed.
4. The control unit according to any one of claims 1 to 3, wherein the control unit executes a process of mapping signals belonging to the two or more information sources in the one symbol time when a predetermined condition is satisfied. The communication device described.
5. A receiver that receives a signal to which signals belonging to two or more information sources are mapped in one symbol time of the single carrier system.
   A communication device including a control unit for demapping signals belonging to the two or more information sources.
   

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