WO2021019631A1

WO2021019631A1 - Communication device and communication method

Info

Publication number: WO2021019631A1
Application number: PCT/JP2019/029555
Authority: WO
Inventors: 邦彦手島; 義嗣島津; 大輔平塚; アニールウメシュ
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2021-02-04
Also published as: CN114128224A; CN114128224B

Abstract

A communication device comprising: a transmission unit for transmitting, to other communication devices, information that indicates the range of amplification rates that the amplifier of the local device can operate properly; a reception unit for receiving, from the other communication devices, the sampling series of in-phase and orthogonal components of the orthogonal frequency division multiplexed (OFDM) signal of the amplification rate and frequency domain set to the local device; and a control unit for sending out a wireless signal to which the amplification rate set to the local device on the basis of the sampling series is applied.

Description

Communication device and communication method

The present invention relates to a communication device and a communication method in a wireless communication system.

In NR (New Radio) (also called "5G"), which is the successor system to LTE (Long Term Evolution), the requirements are a large-capacity system, high-speed data transmission speed, low delay, and simultaneous operation of many terminals. Techniques that satisfy connection, low cost, power saving, etc. are being studied (for example, Non-Patent Document 1).

The O-RAN Alliance has been established for the purpose of promoting openness and intelligence in 5G RAN (Radio Access Network). Today, many businesses and vendors have joined the O-RAN Alliance and are discussing openness.

In O-RAN, multiple architectures are being discussed, and one of them is an open fronthaul interface that realizes the interconnection between the baseband processing unit and the radio unit between different vendors. .. O-DU (O-RAN Distributed unit) and O-RU (O-RAN Radio unit) that separately realize layer 2 functions, baseband signal processing, and radio signal processing are defined as function groups in O-RAN. ing. The front hall interface corresponds to the interface between O-DU and O-RU.

In O-RAN, the transmission power of the RF signal transmitted from O-RU to the radio section is set from O-DU. The O-DU transmits the set value of the amplification factor and the sample value of the signal to the O-RU. However, if the set value of the amplification factor transmitted from the O-DU is not within the range of the amplification factor that the power amplifier provided in the O-RU can operate properly, the linearity of the input / output signal of the power amplifier becomes There is a concern that the signal is not maintained and the signal is transmitted with a power different from the assumption or the transmission signal waveform is distorted, and as a result, the terminal cannot receive the downlink signal correctly and the downlink communication does not communicate correctly.

The present invention has been made in view of the above points, and an object of the present invention is to set an appropriate amplification factor in a wireless function unit provided with a power amplifier in a wireless communication system.

According to the disclosed technology, a transmitter that transmits information indicating an amplification factor range in which the amplifier of the own device can operate properly to another communication device, and OFDM of the amplification factor and the frequency domain set in the own device. (Orthogonal Frequency Division Multiplexing) A receiving unit that receives sampling sequences of in-phase components and orthogonal components of a signal from the other communication device, and sends out a radio signal to which an amplification factor set in the own device is applied based on the sampling sequence. A communication device having a control unit is provided.

According to the disclosed technology, in a wireless communication system, an appropriate amplification factor can be set in a wireless function unit provided with a power amplifier.

It is a figure which shows the configuration example of the architecture of O-RAN. It is a figure which shows the structural example of gNB10. It is a figure for demonstrating the signal between O-DU10A and O-RU10B. It is a figure for demonstrating an example of the method of determining the transmission power of O-RU10B. It is a sequence diagram for demonstrating the signal between O-DU10A and O-RU10B. It is a figure for demonstrating the example (1) of setting the amplification factor in embodiment of this invention. It is a figure for demonstrating the example (2) of setting the amplification factor in embodiment of this invention. It is a figure for demonstrating the example (3) of setting the amplification factor in embodiment of this invention. It is a figure for demonstrating the example (4) of setting the amplification factor in embodiment of this invention. It is a figure which shows the example (1) of the data model in embodiment of this invention. It is a figure which shows the example (2) of the data model in embodiment of this invention. It is a flowchart for demonstrating the example of the activation procedure in Embodiment of this invention. It is a figure which shows an example of the functional structure of the base station 10 in embodiment of this invention. It is a figure which shows an example of the hardware composition of the base station 10 in embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

Existing technology is appropriately used in the operation of the wireless communication system according to the embodiment of the present invention. However, the existing technology is, for example, an existing LTE, but is not limited to the existing LTE. Further, the term "LTE" used in the present specification shall have a broad meaning including LTE-Advanced and LTE-Advanced and later methods (eg, NR) unless otherwise specified.

Further, in the embodiment of the present invention described below, SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical) used in the existing LTE. Use terms such as random access channel). This is for convenience of description, and signals, functions, etc. similar to these may be referred to by other names. Further, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH and the like. However, even if it is a signal used for NR, it is not always specified as "NR-".

Further, in the embodiment of the present invention, the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other system (for example, Flexible Duplex, etc.). Method may be used.

Further, in the embodiment of the present invention, "configuring" the radio parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the base station 10 or The radio parameter notified from the terminal may be set.

FIG. 1 is a diagram showing a configuration example of the O-RAN architecture. As shown in FIG. 1, the network architecture has "Operation & Automation" as a function for realizing the operation management of the network. "Orchestration & Automation" is, for example, ONAP (Open Networking Automation Platform), and realizes MANO (Management and Network Orchestration), NMS (Network Management System), and the like. "Operation & Automation" is composed of functional parts such as "Design", "Inventory", "Police", "Configuration" and "RAN Inventory Controller (RIC) non-RT".

The networks that are operated and managed via interface A1 by "Orchestration & Automation" are "RAN Intelligent Controller (RIC) near-RT", "Multi-RAT CU Protocol Stack", "NFVI (Network functions virtualization Platform)". -It has functional parts such as "DU (O-RAN Distributed Unit)" and "O-RU (O-RAN Radio Unit)".

"RIC near-RT" has functional parts such as "3rd party APP", "Radio Connection Mgmt", "mobility Mgmt", "QoS Mgmt", "Interference Mgmt" and "Trained Model" as application layers. Further, the "RIC near-RT" has a "Radio-Network Information Base". The "RIC near-RT" is connected to the CU and DU via the interface E2.

"Multi-RAT CU Protocol Stack" is composed of "CU-CP (Control plane)" and "CU-UP (User plane)". "CU-CP" has a protocol "RRC (Radio Resource Control)" and a protocol "PDCP (Packet Data Convergence Protocol) -C", and "CU-UP" is a protocol "SDAP (Service Data Adaptation Protocol)". And has the protocol "PDCP-U". The "Multi-RAT CU Protocol Stack" is connected to the "O-DU" via the interface F1.

"NFVI Platform" is a virtual layer and COTS (commercial off the shelf) platform.

"O-DU" is composed of "RLC (RadioLinkControl)", "MAC (MediaAccessControl)", and "PHY-high". The "O-DU" is connected to the "O-RU" via the interface "Open Front Haul (front hall)". "O-RU" is composed of "PHY-low" and "RF".

FIG. 2 is a diagram showing a configuration example of gNB10. As shown in FIG. 2, the base station gNB10 is separated into CU10C, O-DU10A and O-RU10B. CU10C includes RRC / SDAP and PDCP. O-DU10A includes RLC, MAC and PHY-High. O-RU10B includes PHY-Low & RF. An IQ sample sequence of an OFDM (Orthogonal Frequency Division Multiplexing) signal in the frequency domain is transmitted and received between the O-DU 10A and the O-RU 10B. The IQ sample sequence is a sampling series of in-phase components and orthogonal components of a complex digital signal.

As shown in FIG. 2, the PHY-High functions of the O-DU 10A in the DL (Downlink) processing flow such as PDSCH (Physical Downlink Shared Channel) are "encoding", "scramble", and "modulation". , "Layer mapping", "Precoding" and "Resource element mapping". The PHY-Low & RF functions of the O-RU10B in the subsequent DL processing flow are "precoding", "digital BF (BeamForming)", "IFFT (Inverse Fast Fourier Transform)", "analog transformation", and "analog BF". ". When precoding is performed by O-RU10B, O-DU10A does not perform precoding.

As shown in FIG. 2, the PHY-Low & RF functions of the O-RU10B in the UL (Uplink) processing flow such as PUSCH (Physical Uplink Shared Channel) include "analog BF", "digital conversion", and "FFT". (Fast Fourier Transform) ”,“ Digital BF ”. In the subsequent UL processing flow, the PHY-High functions of the O-DU10A are "resource element demapping", "equivalent processing / IDFT / channel estimation", "demodulation", "declaration" and "decoding". ..

FIG. 3 is a diagram for explaining a signal between O-DU10A and O-RU10B. As shown in FIG. 3, a U-Plane signal, a C-Plane signal, an M-Plane signal, and an S-Plane signal are transmitted and received between the O-DU10A and the O-RU10B via the front hole.

The U-Plane signal is a DL signal transmitted by the O-RU10B to the radio section or a UL signal received from the radio section, and is exchanged by an IQ sample string of a digital IQ signal, that is, an OFDM signal in the frequency domain.

The C-Plane signal is a signal necessary for various controls related to transmission / reception of the U-Plane signal, and for example, notifies information related to radio resource mapping, beamforming, etc. of the U-Plane signal. As shown in FIG. 3, the C-Plane signal is transmitted from the O-DU10A to the O-RU10B in one direction. However, in the case of LAA (License-Assisted Access using LTE), a C-Plane signal may be transmitted from the O-RU10B to the O-DU10A.

The M-Plane signal is a signal necessary for the management of O-DU10A and O-RU10B. For example, the O-RU10B notifies the O-DU10A of various hardware capabilities of the O-RU10B via the M-Plane signal, and the O-DU10A notifies the O-RU10B of various setting values.

The S-Plane signal is a signal required for synchronous control between O-DU10A and O-RU10B.

FIG. 4 is a diagram for explaining an example of a method of determining the transmission power of the O-RU10B. The downlink signal transmission power transmitted by the O-RU10B is determined by the following 1) and 2). By setting or notifying both 1) and 2) of the O-DU10A, the desired transmission power is realized.

1) The magnitude of the digital power scaling (DL gain) setting value. As shown in FIG. 4, the O-DU 10A to the O-RU 10B are set in advance at the timing such as when the device is started via the M-Plane. The DL gain set value is used for adjusting the level of the power amplifier included in the O-RU10B.
2) The size of the sample value of the digital IQ signal. Each DL signal transmission via the U-Plane is notified from the O-DU 10A to the O-RU 10B.

FIG. 5 is a sequence diagram for explaining signals between O-DU10A and O-RU10B. In step S1, the O-RU10B reports to the O-DU10A the maximum configurable DL gain. Subsequently, in step S2, the O-DU 10A notifies the O-RU 10B of the value to be set as the DL gain.

Here, regarding the power amplifier included in the O-RU10B, the range of amplification factor in which the linearity of the input / output signal is generally maintained is limited. Therefore, the range of amplification factors that can be operated properly is generally limited. However, in the current O-RAN specifications, the information notified from the O-RU10B to the O-DU10A is only the "maximum value of the configurable amplification factor", and the O-DU10A has the "appropriately operable amplification factor". I can't figure out the range of. Therefore, depending on the DL gain value set by the O-DU10A, the linearity of the input / output signals of the power amplifier may not be maintained, signal transmission with a power different from the assumption, distortion of the transmission signal waveform, etc. may occur, and as a result, the terminal However, there is a concern that the downlink signal cannot be received correctly and the downlink communication cannot be communicated correctly. Therefore, it is necessary for the O-DU 10A to be able to grasp the "range of amplification factor that operates properly".

FIG. 6 is a diagram for explaining an example (1) of setting the amplification factor in the embodiment of the present invention. The O-RU10B notifies the O-DU10A of information indicating the range of DL gain in which the power amplifier operates properly. Based on this information, the O-DU10A can set the DL gain within the range of appropriate operation for the O-RU10B. For example, in step S1 shown in FIG. 5, information indicating a DL gain range in which the power amplifier operates appropriately may be notified from the O-RU 10B to the O-DU 10A. Information indicating whether or not to notify the DL gain range may be notified from O-RU10B to O-DU10A, and information indicating whether or not to notify the DL gain range may be notified from O-DU10A to O. -The RU10B may be notified.

FIG. 6 is an example in which information indicating the upper and lower end values of the properly operating DL gain range is notified. As shown in FIG. 6, the O-RU 10B may notify the O-DU 10A of the upper limit value and the lower limit value of the DL gain. The O-DU10A can set an appropriate DL gain to the O-RU10B based on the upper limit value and the lower limit value. The upper end or the upper limit may be replaced with the maximum value, and the lower end or the lower limit may be replaced with the minimum value. Information indicating whether or not to notify the lower limit of the DL gain may be notified from the O-RU 10B to the O-DU 10A, and information indicating whether or not to notify the lower limit of the DL gain may be notified to the O-DU 10A. May be notified to O-RU10B.

FIG. 7 is a diagram for explaining an example (2) of setting the amplification factor in the embodiment of the present invention. FIG. 7 is an example in which information indicating the upper and lower end values of the properly operating DL gain range is notified. As shown in FIG. 7, the O-RU 10B may notify the O-DU 10A of the difference α based on the upper limit value with the upper limit value X and the lower limit value of the DL gain as X-α. That is, the O-RU10B may notify the O-DU10A of X and α. The O-DU10A can set an appropriate DL gain to the O-RU10B based on the upper limit value and the lower limit value.

FIG. 8 is a diagram for explaining an example (3) of setting the amplification factor in the embodiment of the present invention. FIG. 8 is an example in which information indicating a properly operating DL gain range is notified. As shown in FIG. 8, the O-RU10B may notify the O-DU10A of the upper limit value of the DL gain and the width based on the upper limit value. The O-DU10A can set an appropriate DL gain to the O-RU10B based on the upper limit value and the width based on the upper limit value.

FIG. 9 is a diagram for explaining an example (4) of setting the amplification factor in the embodiment of the present invention. FIG. 9 is an example in which information indicating a properly operating DL gain range is notified. As shown in FIG. 9, the O-RU 10B may notify the O-DU 10A of the combination of the upper limit value and the lower limit value of the DL gain. The O-DU10A can set an appropriate DL gain to the O-RU10B based on the combination of the upper limit value and the lower limit value.

For example, the information notified from the O-RU10B to the O-DU10A may include information indicating a plurality of appropriately operating DL gain ranges. With this information, the O-DU 10A can set the appropriate DL gain to the O-RU 10B if the O-RU 10B has a plurality of properly operating DL gain ranges.

Further, for example, the method of notifying O-DU10A from O-RU10B may be any of the following methods 1) -4).

1) Notify each O-RU10B Array carrier element 2) Notify each O-RU10B Array carrier 3) Notify each O-RU10B Array 4) Notify each O-RU10B

The Array of 1) -4) above is composed of one or a plurality of Array elements, and the Array element is composed of an element that emits one or a plurality of radio waves. Further, the methods 1) and 4) above are assumed to control the amount of signals flowing through the front hall. 1) has the largest amount of signal, and 2), 3), and 4) decrease in order. For example, when the communication status of the front hall is a situation in which the signal amount should be reduced, the method 4) may be used as the notification method.

FIG. 10 is a diagram showing an example (1) of a data model according to the embodiment of the present invention. FIG. 10 is an example of an M-Plane signal using the data modeling language YANG (Yet Another Next Generation). When the O-RU10B shown in FIG. 6 notifies the O-DU10A of the upper limit value and the lower limit value of the DL gain, the M-Plane signal is notified. In the example shown in FIG. 10, the M-Plane signal includes an upper limit value "max-gain" and a lower limit value "min-gain", and is expressed in decibel unit signal64, that is, a 64-bit wide decimal floating-point format. To. The M-Plane signal shown in FIG. 10 may have an identifier or a flag indicating whether or not to notify the lower limit of the DL gain.

FIG. 11 is a diagram showing an example (2) of a data model according to the embodiment of the present invention. FIG. 11 is an example of an M-Plane signal using the data modeling language YANG. When the O-RU10B shown in FIG. 8 notifies the O-DU10A of the upper limit value of the DL gain and the width based on the upper limit value, the M-Plane signal is notified. In the example shown in FIG. 11, the M-Plane signal includes an upper limit value “max-gain” and a width “gain-range” based on the upper limit value, and each includes a decibel unit signal 64, that is, a 64-bit width decimal floating point number floating. Notated in decimal format. The M-Plane signal shown in FIG. 11 may have an identifier or a flag indicating whether or not to notify the DL gain range.

FIG. 12 is a flowchart for explaining an example of the activation procedure according to the embodiment of the present invention. A procedure (Startup procedure) for establishing an M-Plane connection of O-DU10A and O-RU10B is described in a client-server model based on NETCONF (Network Configuration Protocol) shown in FIG. The NETCONF server supports O-RU10B. The NETCONF client is a device that manages the O-RU, and the O-DU 10A may support it.

As shown in FIG. 12, the startup procedure first executes the initialization of the transport layer. Subsequently, the O-RU10B starts synchronization with the primary reference clock. Subsequently, the O-RU10B calls the NETCONF client to establish a secure connection by SSH (Secure Shell). Subsequently, NETCONF capability discovery may be performed and a new management account may be supplied. Subsequently, management by NETCONF connection is executed, and the information of O-RU10B is searched. Here, the information of the O-RU 10B may be searched, and the information indicating the range of the DL gain that operates appropriately from the O-RU 10B to the O-DU 10A may be notified together with the upper limit value of the DL gain. The upper limit of the DL gain may be notified separately. Information indicating the range of DL gain that operates appropriately from O-RU10B to O-DU10A may be notified by a newly defined procedure.

Software management is then performed to check the CU plane connectivity between the O-DU10A and O-RU10B, set the U plane, recover the delay profile on the O-RU10B, and optionally measure the delay on the CU-plane. .. Subsequently, fault management and performance measurement are enabled. Subsequently, the state of the O-RU 10B including the synchronization information is searched. Subsequently, the operation parameters of the O-RU10B are set, and the service becomes available.

In the O-DU 10A and O-RU 10B configured to separate a part of the gNB 10 according to the above embodiment, the O-RU 10B notifies the O-DU 10A of the appropriate amplification factor range corresponding to the power amplifier of the own device. By doing so, the O-DU10A can set an appropriate amplification factor to the O-RU10B.

That is, in a wireless communication system, an appropriate amplification factor can be set in a wireless function unit provided with a power amplifier.

(Device configuration)
Next, a functional configuration example of the base station 10 that executes the processes and operations described so far will be described. The base station 10 includes a function of carrying out the above-described embodiment. However, the base station 10 may include only some of the functions in the embodiment.

<Base station 10>
FIG. 13 is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention. As shown in FIG. 13, the base station 10 has a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 13 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed. The gNB10, O-DU10A, O-RU10B, and CU10C may have a part or all of the functional parts shown in FIG. 13 and realize the functions described in the examples.

The transmission unit 110 has a function of transmitting a message between network nodes to another network node. Further, the transmission unit 110 may have a function of generating a signal to be transmitted to the terminal side and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from another network node or terminal and acquiring information of, for example, a higher layer from the received signals. In addition, the receiving unit 120 receives a message between network nodes from another network node. Further, the transmission unit 110 may have a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, or the like to the terminal.

The setting unit 130 has a function of storing preset setting information and various setting information to be transmitted to a terminal or a network node. The contents of the setting information are, for example, setting information related to communication between network nodes such as between O-DU and O-RU, setting information for DL transmission or UL reception, and the like.

As described in the embodiment, the control unit 140 controls communication between network nodes or communication with terminals. The function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.

(Hardware configuration)
The block diagram (FIG. 13) used in the description of the above 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 by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , 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. There are broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't. For example, a functional block (constituent unit) that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter). As described above, the method of realizing each of them is not particularly limited.

For example, the base station 10 or the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 14 is a diagram showing an example of the hardware configuration of the base station 10 according to the embodiment of the present disclosure. The base station 10 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. The O-DU10A, O-RU10B, CU10C and the like may be composed of the hardware shown in FIG. 14 like the base station 10.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the base station 10 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 function in the base station 10 is performed by the processor 1001 performing calculations by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controlling or storing the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the device 1002 and the auxiliary storage device 1003.

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like. For example, the above-mentioned control unit 140, control unit 240, and the like may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 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. For example, the control unit 140 of the base station 10 shown in FIG. 13 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-mentioned various processes have been described as being executed by one processor 1001, they 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 storage device 1002 is a computer-readable recording medium, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured. The storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.

The auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu). -It may be composed of at least one of a ray® disk), a smart card, a flash memory (eg, a card, a stick, a key drive), a floppy® disk, a magnetic strip, and the like. The storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 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, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of. For example, the transmission / reception antenna, the amplifier unit, the transmission / reception unit, the transmission line interface, and the like may be realized by the communication device 1004. The transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives 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).

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

Further, the base station 10 includes hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured, and the hardware may realize a part or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.

(Summary of embodiments)
As described above, according to the embodiment of the present invention, the transmitter unit that transmits information indicating the range of the amplification factor at which the amplifier of the own device can operate appropriately to another communication device, and the own device. A receiving unit that receives sampling sequences of in-phase components and orthogonal components of OFDM (Orthogonal Frequency Division Multiplexing) signals in the amplification factor and frequency domain set in the above from the other communication device, and the own device based on the sampling sequence. A communication device including a control unit for transmitting a radio signal to which an amplification factor is applied is provided.

In the O-DU 10A and O-RU 10B having a configuration in which a part of the gNB 10 is separated by the above configuration, the O-RU 10B notifies the O-DU 10A of the appropriate amplification factor range corresponding to the power amplifier of the own device. As a result, the O-DU10A can set an appropriate amplification factor to the O-RU10B. That is, in the wireless communication system, an appropriate amplification factor can be set in the wireless function unit including the power amplifier.

The information indicating the range of the amplification factor may include a width based on the upper limit value of the amplification factor and the lower limit value of the amplification factor, or the upper limit value of the amplification factor and the upper limit value of the amplification factor. With this configuration, the O-RU10B can notify the O-DU10A of the range of the appropriate amplification factor corresponding to the power amplifier of the own device.

The information indicating the amplification factor range may include a plurality of amplification factor ranges. With this configuration, the O-RU 10B can notify the O-DU 10A of a plurality of amplification factor ranges when there are a plurality of appropriate amplification factor ranges corresponding to the power amplifier of the own device.

The transmission unit may transmit information indicating the range of the amplification factor to the other communication device for each antenna of the communication device or for each communication device. With this configuration, the O-RU10B can control the amount of signals flowing through the front hall.

Further, according to the embodiment of the present invention, the receiving unit that receives information indicating the range of the amplification factor at which the amplifier of the other communication device can operate appropriately from the other communication device, and the amplification factor. Based on the information indicating the range, the control unit that determines the amplification factor to be set in the other communication device and the sampling of the in-phase component and the orthogonal component of the OFDM (Orthogonal Frequency Division Multiplexing) signal in the determined amplification factor and frequency domain. A communication device is provided that includes a transmitter that transmits a sequence to the other communication device.

Further, according to the embodiment of the present invention, the transmission procedure for transmitting information indicating the range of the amplification factor at which the amplifier of the own device can operate appropriately to another communication device and the amplification factor set in the own device. And the reception procedure for receiving the sampling sequence of the in-phase component and the orthogonal component of the OFDM (Orthogonal Frequency Division Multiplexing) signal in the frequency domain from the other communication device, and the amplification factor set in the own device based on the sampling sequence are applied. A communication method is provided in which the communication device executes a control procedure for transmitting the radio signal.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, substitutions, and the like. There will be. Although explanations have been given using specific numerical examples in order to promote understanding of the invention, these numerical values are merely examples and any appropriate value may be used unless otherwise specified. The classification of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in combination with another item. It may be applied (as long as there is no contradiction) to the matters described in. The boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. With respect to the processing procedure described in the embodiment, the order of processing may be changed as long as there is no contradiction. Although the base station 10 has been described with reference to functional block diagrams for convenience of processing description, such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor included in the base station 10 according to the embodiment of the present invention includes random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, and the like. It may be stored on a CD-ROM, database, server or any other suitable storage medium.

Further, the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used. RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.

Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), IEEE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, 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 specification 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 10 in the present specification may be performed by its upper node (upper node). In a network consisting of one or more network nodes having a base station 10, various operations performed for communication with a terminal are performed by the base station 10 and other network nodes other than the base station 10 (for example,). , MME, S-GW, etc., but not limited to these). In the above example, the case where there is one network node other than the base station 10 is illustrated, but the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..

The information, signals, etc. described in the present disclosure 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 and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

The determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example). , Comparison with a predetermined value).

Software is an instruction, instruction set, code, code segment, program code, program, subprogram, software module, whether called software, firmware, middleware, microcode, hardware description language, or another name. , Applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, features, etc. should be broadly interpreted.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twist pair, digital subscriber line (DSL: Digital Subscriber Line), 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.

Note that the terms explained 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: Component Carrier) 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.

In addition, 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 explicitly disclosed in this disclosure. Since the 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: Base Station)", "wireless base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB" (GNB) ”,“ access point ”,“ transmission point ”,“ reception point ”,“ transmission / reception point (transmission / reception point) ”,“ cell ”,“ sector ”, Terms such as "cell group," "carrier," and "component carrier" can be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)). Communication services can also be provided by (Remote Radio Head). The term "cell" or "sector" is a part or all of the coverage area of at least one of the base station and the base station subsystem that provides the communication service in this coverage. Point to.

In the present disclosure, terms such as "mobile station (MS: Mobile Station)", "user terminal", "user device (UE: User Equipment)", and "terminal" may be used interchangeably. ..

Mobile stations can be 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, depending on the trader. 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, the 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 the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

Further, the base station in the present disclosure may be read by the user terminal. For example, a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the above. In this case, the terminal may have the function of the base station 10 described above. In addition, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the uplink, downlink, and the like may be read as side channels.

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

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. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that "resolving", "selecting", "choosing", "establishing", "comparing", etc. 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.

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 energies having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.

The phrase "based on" as 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".

Any reference to elements using designations such as "first", "second", etc. 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. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.

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

When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Furthermore, 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 that the nouns following these articles are in the plural.

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".

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with 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.

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 an amendment or modification without departing from the purpose and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of this disclosure is for purposes of illustration only and does not have any restrictive meaning to this disclosure.

10 Base station 10A O-DU
10B O-RU
10C CU
110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims

A transmitter that transmits information indicating the range of amplification factor that the amplifier of the own device can operate properly to other communication devices,
A receiving unit that receives sampling sequences of in-phase components and orthogonal components of OFDM (Orthogonal Frequency Division Multiplexing) signals in the amplification factor and frequency domain set in the own device from the other communication device.
A communication device having a control unit that transmits a radio signal to which an amplification factor set in the own device is applied based on the sampling sequence.
The communication device according to claim 1, wherein the information indicating the range of the amplification factor includes the upper limit value of the amplification factor and the lower limit value of the amplification factor, or the upper limit value of the amplification factor and the upper limit value of the amplification factor.
The communication device according to claim 1, wherein the information indicating the amplification factor range includes a plurality of amplification factor ranges.
The communication device according to claim 1, wherein the transmission unit transmits information indicating the range of the amplification factor for each antenna of the communication device or for each communication device to the other communication device.
A receiver that receives information from the other communication device indicating the range of amplification factor that the amplifier of the other communication device can operate properly.
A control unit that determines the amplification factor to be set in the other communication device based on the information indicating the range of the amplification factor.
A communication device having a transmission unit that transmits a sampling series of in-phase components and orthogonal components of an OFDM (Orthogonal Frequency Division Multiplexing) signal in the determined amplification factor and frequency domain to the other communication device.
A transmission procedure for transmitting information indicating the range of amplification factor that the amplifier of the own device can operate properly to other communication devices, and
A reception procedure for receiving a sampling series of in-phase components and orthogonal components of an OFDM (Orthogonal Frequency Division Multiplexing) signal in the amplification factor and frequency domain set in the own device from the other communication device, and
A communication method in which a communication device executes a control procedure for transmitting a radio signal to which an amplification factor set in the own device is applied based on the sampling sequence.