CN114128224B - Communication device and communication method - Google Patents

Abstract

The communication device comprises: a transmission unit that transmits information indicating a range of amplification factors in which an amplifier of the apparatus can operate appropriately to other communication apparatuses; a receiving unit that receives, from the other communication device, a sampling sequence of an in-phase component and a quadrature component of an OFDM (orthogonal frequency division multiplexing) signal of an amplification rate and a frequency domain set for the device; and a control unit that transmits a wireless signal to which an amplification factor set for the device based on the sampling sequence is applied.

Description

Communication device and communication method

Technical Field

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

Background

In NR (New Radio) which is a subsequent system of LTE (long term evolution (Long Term Evolution)), a technology that satisfies a requirement such as a high-capacity system, a high data transmission rate, low delay, simultaneous connection of a large number of terminals, low cost, and power saving has been studied (for example, non-patent document 1).

An O-RAN alliance aimed at the development of openness and intellectualization in 5G RANs (radio access networks (Radio Access Network)) is established. Today, many operators and providers alliance O-RAN alliances and discussions about openness are made.

In the O-RAN, a plurality of architectures are studied, and as one of them, an open Fronthaul (frontau) interface that realizes interconnection of baseband processing units and radio units between different vendors is studied. As a functional group in the O-RAN, an O-DU (O-RAN distributed unit (O-RAN Distributed unit)) and an O-RU (O-RAN Radio unit) realized by separating layer 2 functions, baseband signal processing, and Radio signal processing are defined. The forward interface corresponds to the interface between the O-DU and the O-RU.

Prior art literature

Non-patent literature

Non-patent document 1:3GPP TS 38.300 V15.6.0 (2019-06)

Disclosure of Invention

Problems to be solved by the invention

In the O-RAN, the transmission power of an RF signal transmitted from the O-RU to the radio section is set from the O-DU. The O-DU sends the set value of the amplification to the O-RU and the sample value of the signal. However, when the set value of the amplification factor transmitted from the O-DU is not included in the range of the amplification factor at which the power amplifier included in the O-RU can operate properly, there is a concern that: the linearity of the input/output signal of the power amplifier is not maintained, and signal transmission at a power different from that assumed, distortion of the transmission signal waveform, and the like are generated, so that the terminal cannot correctly receive the downlink signal, and the downlink communication cannot be correctly cleared.

The present invention has been made in view of the above-described aspects, and an object of the present invention is to set an appropriate amplification factor for a radio function unit including a power amplifier in a radio communication system.

Means for solving the problems

According to the disclosed technology, there is provided a communication device having: a transmission unit that transmits information indicating a range of amplification factors in which an amplifier of the apparatus can operate appropriately to other communication apparatuses; a receiving unit that receives, from the other communication device, a sampling sequence of an in-phase component and a quadrature component of an OFDM (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing)) signal of an amplification rate and a frequency domain set for the device; and a control unit that transmits a wireless signal to which an amplification factor set for the device based on the sampling sequence is applied.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the disclosed technique, in a wireless communication system, an appropriate amplification factor can be set for a wireless functional unit including a power amplifier.

Drawings

Fig. 1 is a diagram showing an example of the structure of an O-RAN architecture.

Fig. 2 is a diagram showing a configuration example of the gNB 10.

Fig. 3 is a diagram for explaining signals between the O-DU10A and the O-RU 10B.

Fig. 4 is a diagram for explaining an example of a method for determining the transmission power of the O-RU 10B.

Fig. 5 is a timing diagram for explaining signals between the O-DU10A and the O-RU 10B.

Fig. 6 is a diagram for explaining example (1) of setting magnification in the embodiment of the present invention.

Fig. 7 is a diagram for explaining an example (2) of setting the magnification in the embodiment of the present invention.

Fig. 8 is a diagram for explaining example (3) of setting magnification in the embodiment of the present invention.

Fig. 9 is a diagram for explaining an example (4) of setting the magnification in the embodiment of the present invention.

Fig. 10 is a diagram showing an example (1) of a data model in the embodiment of the present invention.

Fig. 11 is a diagram showing an example (2) of a data model in the embodiment of the present invention.

Fig. 12 is a flowchart for explaining an example of a startup procedure in the embodiment of the present invention.

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.

Fig. 14 is a diagram showing an example of a hardware configuration of the base station 10 according to the embodiment of the present invention.

Detailed Description

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.

In carrying out the operation of the wireless communication system of the embodiment of the present invention, the prior art is suitably used. The prior art is, for example, an existing LTE, but is not limited to the existing LTE. The term "LTE" used in the present specification is intended to have a broad meaning including LTE-Advanced and beyond (e.g., NR) unless otherwise specified.

In the embodiments of the present invention described below, terms such as SS (synchronization signal (Synchronization signal)), PSS (Primary SS), SSs (Secondary SS), PBCH (physical broadcast channel (Physical broadcast channel)), and PRACH (physical random access channel (Physical random access channel)) used in conventional LTE are used. For convenience in description, the same signals, functions, and the like may be referred to by other names. Furthermore, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even the signal used in NR is not necessarily expressed as "NR-".

In the embodiment of the present invention, the Duplex (Duplex) scheme may be a TDD (time division Duplex (Time Division Duplex)) scheme, an FDD (frequency division Duplex (Frequency Division Duplex)) scheme, or another scheme (for example, flexible Duplex) scheme.

In the embodiment of the present invention, the "set (configuration)" of the radio parameters and the like may be a specific value set in advance (Pre-configuration), or may be a radio parameter to be notified from the base station 10 or the terminal.

Fig. 1 is a diagram showing an example of the architecture of an O-RAN. As shown in fig. 1, a network architecture has "organization & Automation" as a function for realizing operation management of a network. "orchestration and automation" is, for example, ONAP (open network automation platform (Open Networking Automation Platform)), implementation MANO (management and network orchestration (Management and Network Orchestration)), or NMS (network management system (Network Management System)), or the like. "orchestration and automation" is made up of functional units such as "Design", "Inventory", "Policy", "Configuration" and "RAN Intelligent Controller (RIC) non-RT (RAN Intelligent Controller (RIC) non-RT)".

The network managed by the arrangement and automation via the interface A1 has functional units such as "RAN Intelligent Controller (RIC) near RT (RAN Intelligent Controller (RIC) near-RT)", "Multi-RAT CU protocol stack (Multi-RAT CU Protocol Stack)", "NFVI (network function virtualization infrastructure (Network functions virtualization infrastructure) Platform)", "O-DU (O-RAN distributed Unit (O-RAN Distributed Unit))", "and" O-RU (O-RAN Radio Unit) ".

"RIC near RT" has as an application layer a "third party APP (3 ^rd part APP) "," radio connection Mgmt (Radio Connection Mgmt) "," mobility Mgmt (Mobility Mgmt) "," QoS Mgmt "," interference Mgmt (Interference Mgmt) ", and" Trained Model ", etc. In addition, "RIC near RT" has "Radio network information base (Radio-Network Information Base)". "RIC near RT" is connected with the CU and DU via interfaces E2.

The "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 (Radio Resource Control))" and a protocol "PDCP (packet data convergence protocol (Packet Data Convergence Protocol)) -C", "CU-UP" has a protocol "SDAP (service data adaptation protocol (Service Data Adaptation Protocol))" and a protocol "PDCP-U". The "multi-RAT CU protocol stack" is connected with the "O-DU" via interface F1.

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

The "O-DU" is composed of "RLC (radio link control (Radio Link Control))", "MAC (medium access control (Media Access Control))", "PHY-high". The "O-DU" is connected to the "O-RU" via an interface "Open Front Haul" (Forward) ". The "O-RU" is composed of "PHY-low" and "RF".

Fig. 2 is a diagram showing a configuration example of the gNB 10. As shown in fig. 2, the base station gNB10 is separated into CU10C, O-DU10A and O-RU10B. CU10C includes RRC/SDAP and PDCP. The O-DU10A includes RLC, MAC, and PHY-High. O-RU10B includes PHY-Low & RF. Between the O-DU10A and the O-RU10B, IQ sample strings of an OFDM (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing)) signal of a frequency domain are transmitted and received. The IQ sample string is a sequence of samples of the in-phase component as well as the quadrature component of the complex digital signal.

As shown in fig. 2, PHY-High functions of the O-DU10A in a DL (Downlink) processing flow such as PDSCH (physical Downlink shared channel (Physical Downlink Shared Channel)) are "encoding", "scrambling", "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 (Beam Forming)", "IFFT (inverse fast fourier transform (Inverse Fast Fourier Transform))", "analog transform", "analog BF". In the case where precoding is implemented in the O-RU10B, the O-DU10A does not implement 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 (Physical Uplink Shared Channel)) are "analog BF", "digital transform", "FFT (fast fourier transform (Fast Fourier Transform))" and "digital BF". In the following UL processing flow, the functions of PHY-High included in the O-DU10A are "resource element demapping", "equivalent processing/IDFT/channel estimation", "demodulation", "descrambling", and "decoding".

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

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

The C-plane signal is a signal required for performing various controls related to transmission and reception of the U-plane signal, and notifies information related to radio resource mapping, beamforming, and the like of the U-plane signal, for example. As shown in fig. 3, the C-plane signal is transmitted from the O-DU10A to the O-RU10B in a unidirectional manner. However, in the case of LAA (licensed assisted access using LTE (License-Assisted Access using LTE)), a C-plane signal may also be transmitted from O-RU10B to O-DU10A.

The M-plane signal is a signal required for management of the O-DU10A and the O-RU10B. For example, various hardware capabilities of the O-RU10B are notified from the O-RU10B to the O-DU10A and various settings are notified from the O-DU10A to the O-RU10B via the M-plane signal.

The S-plane signal is a signal required for synchronization control between the O-DU10A and the O-RU10B.

Fig. 4 is a diagram for explaining an example of a method for determining the transmission power of the O-RU10B. The downlink signal transmission power transmitted by the O-RU10B is determined by 1) and 2) below. The desired transmit power is achieved by setting or informing both 1) and 2) by the O-DU 10A.

1) The magnitude of the digital power scaling (DL gain) setting. As shown in fig. 4, the timing at the time of device start-up or the like is set in advance from the O-DU10A to the O-RU10B via the M-plane. The set value of the DL gain is used for level adjustment of a power amplifier provided in the O-RU10B, and the like.

2) The magnitude of the sample values of the digital IQ signal. Each time a DL signal is transmitted via the U-plane, the O-RU10B is notified from the O-DU 10A.

Fig. 5 is a timing diagram for explaining signals between the O-DU10A and the O-RU10B. In step S1, the O-RU10B reports a settable maximum value of DL gain to the O-DU 10A. Next, in step S2, the O-DU10A notifies the O-RU10B of the value set as the DL gain.

Here, regarding the power amplifier provided in the O-RU10B, generally, the range of the amplification factor in which the linearity of the input/output signal is maintained is limited. Therefore, the range of the magnification that can be suitably operated is generally limited. However, in the existing O-RAN specifications, the information notified from the O-RU10B to the O-DU10A is only "the maximum value of settable magnification", and the O-DU10A cannot grasp "the range of magnification in which the operation can be performed appropriately". Thus, there are the following concerns: depending on the value of DL gain set by the O-DU10A, linearity of the input/output signal of the power amplifier cannot be maintained, and distortion of the signal transmission or transmission signal waveform at a power different from that assumed is generated, as a result, the terminal cannot correctly receive the downstream signal, and the downstream communication cannot be correctly dredged. Therefore, the O-DU10A must be able to grasp "the range of the amplification factor for proper operation".

Fig. 6 is a diagram for explaining example (1) of setting magnification in the embodiment of the present invention. The O-RU10B notifies the O-DU10A of information indicating a range of DL gain in which the power amplifier operates properly. Based on this information, the O-DU10A can set a DL gain within a range where the O-RU10B operates appropriately. For example, in step S1 shown in fig. 5, information indicating a range of DL gain in which the power amplifier is properly operated may be notified from the O-RU10B to the O-DU 10A. In addition, information indicating whether to notify the range of DL gain may be notified from O-RU10B to O-DU10A, or information indicating whether to notify the range of DL gain may be notified from O-DU10A to O-RU 10B.

Fig. 6 is an example of information notified of values indicating the upper and lower ends of the range of DL gains that are operating properly. As shown in fig. 6, the O-RU10B may notify the O-DU10A 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 upper limit may be replaced with the maximum value, and the lower end or lower limit may be replaced with the minimum value. The information indicating whether to notify the lower limit value of the DL gain may be notified from the O-RU10B to the O-DU10, or the information indicating whether to notify the lower limit value of the DL gain may be notified from the O-DU10A to the O-RU10B.

Fig. 7 is a diagram for explaining an example (2) of setting the magnification in the embodiment of the present invention. Fig. 7 is an example of information notified of values indicating the upper and lower ends of the range of DL gains that are operating properly. As shown in fig. 7, the O-RU10B may notify the O-DU10A of the difference α based on the upper limit value by setting the upper limit value X and the lower limit value X to X- α of the DL gain. 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 example (3) of setting magnification in the embodiment of the present invention. Fig. 8 is an example of information notified of a range of DL gain indicating proper operation. As shown in fig. 8, the O-RU10B may notify the O-DU10A of the upper limit value of the DL gain and the amplitude 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 amplitude based on the upper limit value.

Fig. 9 is a diagram for explaining an example (4) of setting the magnification in the embodiment of the present invention. Fig. 9 is an example of information notified of a range of DL gain indicating proper operation. As shown in fig. 9, the O-RU10B may notify the O-DU10A of a combination of an upper limit value and a lower limit value of the DL gain. The O-DU10A can set an appropriate DL gain to the O-RU10B based on a combination of an upper limit value and a lower limit value.

For example, the information notified from the O-RU10B to the O-DU10A may include information indicating a range of a plurality of DL gains to be properly operated. According to this information, in the case where the O-RU10B has a plurality of ranges of DL gains that operate properly, the O-DU10A can set the proper DL gain to the O-RU10B.

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

1) Notification per array carrier element (Array carrier element) of O-RU10B

2) Notification per Array carrier (Array carrier) of O-RU10B

3) Notification per Array (Array) of O-RU10B

4) Notification per O-RU10B

The array of 1) to 4) above is constituted by one to a plurality of array elements constituted by one to a plurality of elements emitting electric waves. The methods 1) to 4) described above contemplate controlling the amount of signal flowing in the forward link. 1) is the largest in signal quantity, and the signal quantity is smaller in the order of 2), 3) and 4). For example, when the communication status of the forward transmission is a status in which the amount of signals should be reduced, the notification method of 4) may be used.

Fig. 10 is a diagram showing an example (1) of a data model in 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, it is notified of the M-plane signal. 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", which are expressed in decibel units of decmal 64, that is, a 64-bit width 10-ary floating point format, respectively. The M-plane signal shown in fig. 10 may have an identifier or flag indicating whether or not to notify the lower limit value of the DL gain.

Fig. 11 is a diagram showing an example (2) of a data model in 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 amplitude based on the upper limit value, it is notified of the M-plane signal. In the example shown in fig. 11, the M-plane signal includes an upper limit value "max-gain" and a magnitude "gain-range" with respect to the upper limit value, and is expressed in decibel units of decimal64, that is, in a 64-bit wide 10-system floating point format. The M-plane signal shown in fig. 11 may have an identifier or flag indicating whether or not the range of the DL gain is notified.

Fig. 12 is a flowchart for explaining an example of a startup procedure in the embodiment of the present invention. The procedure (Startup procedure) for establishing an M-plane connection for the O-DU10A and O-RU10B is described in the netcon (network configuration protocol (Network Configuration Protocol)) based client/server model shown in fig. 12. The NETCONF server corresponds to the O-RU10B. The netcon f client is a device that manages an O-RU, and the O-DU10A may also correspond.

As shown in fig. 12, the start-up procedure first performs initialization of the transport layer. Then, the O-RU10B begins to synchronize with the master reference clock. Next, the O-RU10B calls (call) netcon f client, setting up a SSH (Secure Shell) based Secure connection. Netcon f capability discovery may then also be performed and a new management account provided. Next, management based on the netcon f connection is performed, retrieving information of the O-RU10B. Here, the information of the O-RU10B may be retrieved, together with the upper limit value of the DL gain, and the information indicating the range of the DL gain to be properly operated may be notified from the O-RU10B to the O-DU10A, or may be notified separately from the upper limit value of the DL gain. In addition, information indicating a range of DL gains to properly operate can also be notified from the O-RU10B to the O-DU10A through a newly defined procedure.

Next, software management is performed, and CU plane connectivity confirmation between the O-DU10A and the O-RU10B, setting of the U plane, restoration of the delay profile in the O-RU10B, and delay measurement of the CU plane as an option are performed. Fault management and performance measurements are then activated. Subsequently, the state of the O-RU10B including the synchronization information is retrieved. Then, the operating parameters of the O-RU10B are set, and the service becomes available.

According to the above embodiment, in the O-DU10A and the O-RU10B having the structure in which a part of the gNB10 is separated, the O-RU10B notifies the O-DU10A of the range of the appropriate amplification factor corresponding to the power amplifier of the present apparatus, so that the O-DU10A can set the appropriate amplification factor to the O-RU10B.

That is, in the wireless communication system, an appropriate amplification factor can be set for the wireless functional unit including the power amplifier.

(device Structure)

Next, a functional configuration example of the base station 10 that performs the processing and operations described so far will be described. The base station 10 includes the functions of implementing the embodiments described above. However, the base station 10 may have only some of the functions in the embodiments.

< 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 includes a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in fig. 13 is merely an example. The names of the functional distinction and the functional units may be arbitrary as long as the operations according to the embodiments of the present invention can be performed. The gNB10 and the O-DU10A, O-RU10B, CU C may have some or all of the functional units shown in FIG. 13, and the functions described in the embodiments may be realized.

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

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

As described in the embodiment, the control unit 140 performs control related to communication between network nodes or communication with a terminal. The transmitting unit 110 may include a function unit related to signal transmission in the control unit 140, and the receiving unit 120 may include a function unit related to signal reception in the control unit 140.

(hardware construction)

The block diagram (fig. 13) used for the description of the above embodiment shows blocks of functional units. These functional blocks (structural units) are realized by any combination of at least one of hardware and software. The implementation method of each functional block is not particularly limited. That is, each functional block may be realized by using 1 device physically or logically combined, or may be realized by directly or indirectly (for example, by using a wire, a wireless, or the like) connecting 2 or more devices physically or logically separated from each other, and using these plural devices. The functional blocks may be implemented by combining software on the above-described 1 apparatus or the above-described plural apparatuses.

The functions include, but are not limited to, judgment, decision, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcast), notification (notification), communication (communication), forwarding (forwarding), configuration (configuration), reconfiguration (reconfiguration), allocation (mapping), assignment (allocation), and the like. For example, a functional block (structural unit) functioning as a transmission function may also be referred to as a transmission unit (transmitting unit) or a transmitter (transmitter). The implementation method is not particularly limited in any way as described above.

For example, the base station 10 and the like in one embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig. 14 is a diagram showing an example of a hardware configuration of the base station 10 according to an embodiment of the present disclosure. The base station 10 may be configured as a computer device physically 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, CU C and the like may be constituted by hardware shown in fig. 14, similarly to the base station 10.

In the following description, the term "device" may be replaced with a circuit, a device, a unit, or the like. The hardware configuration of the base station 10 may be configured to include one or more of the devices shown in the drawings, or may be configured to not include a part of the devices.

Each function of the base station 10 is realized by causing a specific software (program) to be read into hardware such as the processor 1001 and the storage device 1002, and the processor 1001 performs an operation to control communication by the communication device 1004 or to control one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

The processor 1001, for example, causes an operating system to operate to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: central Processing Unit)) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the control unit 140, the control unit 240, and the like described above may also be implemented by the processor 1001.

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 to 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 embodiment modes can be used. For example, the control unit of the base station 10 shown in fig. 13 may also be accommodated in the storage device 1002 and implemented by a control program operating in the processor 1001. While the above-described various processes are described as being executed by 1 processor 1001, the processes may be executed simultaneously or sequentially by 2 or more processors 1001. The processor 1001 may be mounted in more than 1 chip. In addition, the program may also be transmitted from the network via a telecommunication line.

The storage device 1002 may be a computer-readable recording medium, and may be configured of at least one of a ROM (Read Only Memory), an EPROM (erasable programmable Read Only Memory (Erasable Programmable ROM)), an EEPROM (electrically erasable programmable Read Only Memory (Electrically EPROM)), a RAM (random access Memory (Random Access Memory)), and the like, for example. The storage 1002 may also be referred to as a register, a cache, a main memory (main storage), or the like. The storage device 1002 can store a program (program code), a software module, or the like executable to implement a communication method according to one embodiment of the present disclosure.

The auxiliary storage device 1003 may be a computer-readable recording medium, and may be configured of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible Disc (flexible Disc), an magneto-optical disk (for example, a Compact Disc, a digital versatile Disc, a Blu-ray (registered trademark) Disc), a smart card, a flash memory (for example, a card (card), a stick (stick), a key drive (key drive)), a soft (registered trademark) Disc, a magnetic stripe (stripe), and the like. The storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the auxiliary storage device 1003.

The communication device 1004 is hardware (transmitting/receiving device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like, for example. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplexing (FDD: frequency Division Duplex) and time division duplexing (TDD: time Division Duplex). For example, a transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, and the like may be implemented by the communication device 1004. The transmitting and receiving units may also be physically or logically separately mounted by the transmitting unit and the receiving unit.

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

The processor 1001 and the storage device 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be formed using a single bus or may be formed using a different bus between devices.

The base station 10 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP: digital Signal Processor), an ASIC (application specific integrated circuit (Application Specific Integrated Circuit)), a PLD (programmable logic device (Programmable Logic Device)), and an FPGA (field programmable gate array (Field Programmable Gate Array)), or may be configured to implement a part or all of the functional blocks by the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

(summary of embodiments)

As described above, according to an embodiment of the present invention, there is provided a communication device including: a transmission unit that transmits information indicating a range of amplification factors in which an amplifier of the apparatus can operate appropriately to other communication apparatuses; a receiving unit that receives, from the other communication device, a sampling sequence of an in-phase component and a quadrature component of an OFDM (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing)) signal of an amplification rate and a frequency domain set for the device; and a control unit configured to transmit a wireless signal to which an amplification factor set for the device based on the sampling sequence is applied.

With the above configuration, in the O-DU10A and the O-RU10B having the configuration in which a part of the gNB10 is separated, the O-RU10B notifies the O-DU10A of a range of an appropriate amplification factor corresponding to the power amplifier of the apparatus, and thereby the O-DU10A can set the appropriate amplification factor to the O-RU10B. That is, in the wireless communication system, an appropriate amplification factor can be set for the wireless functional unit including the power amplifier.

The information indicating the range of the amplification factor may include an upper limit value of the amplification factor and a lower limit value of the amplification factor, or an upper limit value of the amplification factor and an amplitude based on 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 present apparatus.

The information indicating the range of the magnification may include a plurality of ranges of the magnification. According to this configuration, when there are a plurality of appropriate amplification factor ranges corresponding to the power amplifier of the present apparatus, the O-RU10B can notify the O-DU10A of the plurality of amplification factor ranges.

The transmitting unit may transmit information indicating the range of the amplification factor to the other communication apparatus for each antenna of the communication apparatus or for each communication apparatus. With this structure, the O-RU10B can control the amount of signal flowing in the forward transmission.

Further, according to an embodiment of the present invention, there is provided a communication device including: a receiving unit that receives, from another communication apparatus, information indicating a range of an amplification factor at which an amplifier of the other communication apparatus can operate appropriately; a control unit configured to determine an amplification factor set for the other communication apparatus based on information indicating a range of the amplification factor; and a transmitting unit configured to transmit, to the other communication apparatus, a sampling sequence of an in-phase component and a quadrature component of the determined amplification and frequency-domain OFDM (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing)) signal.

With the above configuration, in the O-DU10A and the O-RU10B having the configuration in which a part of the gNB10 is separated, the O-RU10B can set the appropriate amplification factor to the O-RU10B by notifying the O-DU10A of the appropriate amplification factor range corresponding to the power amplifier of the present apparatus. That is, in the wireless communication system, an appropriate amplification factor can be set for the wireless functional unit including the power amplifier.

In addition, according to an embodiment of the present invention, there is provided a communication method performed by a communication apparatus, including: a transmission step of transmitting information indicating a range of an amplification factor at which an amplifier of the apparatus can operate appropriately to other communication apparatuses; a reception step of receiving, from the other communication device, a sampling sequence of an in-phase component and a quadrature component of an OFDM (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing)) signal of an amplification rate and a frequency domain set for the device; and a control step of transmitting a wireless signal to which an amplification factor set for the device based on the sampling sequence is applied.

With the above configuration, in the O-DU10A and the O-RU10B having the configuration in which a part of the gNB10 is separated, the O-RU10B notifies the O-DU10A of the range of the appropriate amplification factor corresponding to the power amplifier of the present apparatus, and thus the O-DU10A can set the appropriate amplification factor to the O-RU10B. That is, in the wireless communication system, an appropriate amplification factor can be set for the wireless functional unit including the power amplifier.

(supplement of the embodiment)

While the embodiments of the present invention have been described above, the disclosed invention is not limited to the embodiments, and those skilled in the art will understand various modifications, changes, substitutions, and the like. For the purpose of promoting the understanding of the present invention, specific numerical examples have been described, however, these numerical values are merely examples, and any suitable values may be used unless otherwise specified. The distinction between items in the above description is not essential in the present invention, and two or more items described in the items may be used in combination as necessary, and items described in one item may be applied to items described in other items (unless contradiction arises). The boundaries of functional units or processing units in the functional block diagrams do not necessarily correspond to the boundaries of physical components. The operations of the plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components. The processing procedures described in the embodiments may be replaced with a sequence of processing unless contradiction arises. For ease of processing the description, the base station 10 is illustrated using a functional block diagram, however, such means may also be implemented by hardware, by software or by a combination thereof. Software that is operated by a processor provided with the base station 10 may also be stored in Random Access Memory (RAM), flash memory, read Only Memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), a removable disk, a CD-ROM, a database, a server, or any other suitable storage medium according to embodiments of the present invention.

In addition, the notification of information is not limited to the manner/embodiment described in the present disclosure, and may be performed using other methods. For example, the notification of the information may be implemented by physical layer signaling (e.g., DCI (downlink control information (Downlink Control Information)), UCI (uplink control information (Uplink Control Information))), higher layer signaling (e.g., RRC (radio resource control (Radio Resource Control)) signaling, MAC (medium access control (Medium Access Control)) signaling, broadcast information (MIB (master information block (Master Information Block)), SIB (system information block (System Information Block))), other signals, or a combination thereof.

The various modes/embodiments described in the present disclosure can also be applied to at least one of LTE (long term evolution (Long Term Evolution)), LTE-a (LTE-Advanced), upper 3G, IMT-Advanced, 4G (fourth generation mobile communication system (4 th generation mobile communication system)), 5G (fifth generation mobile communication system (5 th generation mobile communication system)), FRA (future Radio access (Future Radio Access)), NR (New Radio)), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra mobile broadband (Ultra Mobile Broadband)), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand)), bluetooth (registered trademark), systems utilizing other appropriate systems, and next generation systems extended based on them. Further, a plurality of systems may be applied in combination (for example, a combination of 5G and at least one of LTE and LTE-a).

The processing procedures, timings, flows, and the like of the embodiments and the embodiments described in the present specification may be replaced in order as long as they are not contradictory. For example, elements of the various steps are presented in an exemplary order with respect to the methods described in this disclosure, and are not limited to the particular order presented.

In the present specification, the specific operation performed by the base station 10 may be performed by an upper node (upper node) thereof, as the case may be. Obviously, in a network composed of one or more network nodes (network nodes) having the base station 10, various operations performed for communication with the terminal can be performed by at least 1 of the base station 10 and other network nodes (for example, MME or S-GW, etc. may be considered, but are not limited thereto) other than the base station 10. In the above, the case where other network nodes than the base station 10 are one is exemplified, however, the other network nodes may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information, signals, and the like described in the present disclosure may be output from a higher layer (upper layer) (or from a lower layer (lower layer)) to a lower layer (or higher layer). Or may be input and output via a plurality of network nodes.

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

The determination in the present disclosure may be performed by a value (0 or 1) expressed in 1 bit, may be performed by a true or false value (boolean): true (true) or false (false)), or may be performed by a comparison of numerical values (e.g., a comparison with a specific value).

Whether software is referred to as software, firmware, middleware, microcode, hardware description language, or by other names, should be construed broadly to mean instructions, instruction sets, code segments, program code, programs, subroutines, software modules, applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may also be transmitted and received via a transmission medium. For example, in the case where software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.), at least one of the wired and wireless technologies is included in the definition of transmission medium.

Information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

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

The term "system" and "network" as used in this disclosure may be used interchangeably.

The information, parameters, and the like described in the present disclosure may be expressed using absolute values, relative values from specific values, or corresponding other information. For example, radio resources may also be indicated by an index.

The names used for the above parameters are not limiting names at any point. Further, the numerical expression and the like using these parameters may be different from those explicitly disclosed in the present disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and thus the various names assigned to these various channels and information elements are not limiting names at any point.

In the present disclosure, terms such as "Base Station", "radio Base Station", "Base Station apparatus", "fixed Station", "NodeB", "eNodeB (eNB)", "gndeb (gNB)", "access Point", "transmission Point (Transmisson Point)", "Reception Point (Reception Point)", "transmission Reception Point (transmission/Reception Point)", "cell", "sector", "cell group", "carrier", "component carrier", and the like can be used interchangeably. A base station is sometimes referred to by the terms macrocell, microcell, femtocell, picocell, and the like.

The base station can accommodate one or more (e.g., three) cells. In the case of a base station accommodating multiple cells, the coverage area of the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small base station for indoor use (remote radio head (RRH: remote Radio Head)), the term "cell" or "sector" refers to a part or the entirety of the coverage area of at least one of the base station and the base station subsystem that is in communication service in that coverage area.

In the present disclosure, terms such as "Mobile Station", "User terminal", "User Equipment (UE), and" terminal "can be used interchangeably.

A mobile station is sometimes referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand-held set, user agent, mobile client, or several other appropriate terms.

At least one of the base station and the mobile station may be referred to as a transmitting apparatus, a receiving apparatus, a communication apparatus, 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 mobile body may be a vehicle (e.g., an automobile, an airplane, etc.), a mobile body that moves unmanned (e.g., an unmanned aerial vehicle, an autopilot, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station further includes means that does not necessarily move during the communication operation. For example, at least one of the base station and the mobile station may be an IoT (internet of things (Internet of Things)) device such as a sensor.

In addition, the base station in the present disclosure may be replaced with a user terminal. For example, the embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals (for example, also referred to as D2D (Device-to-Device)), V2X (Vehicle-to-evaluation), or the like. In this case, the terminal may have the function of the base station 10. Further, the language of "upstream" and "downstream" may be replaced with a term (e.g., "side") corresponding to the communication between terminals. For example, the uplink channel, the downlink channel, etc. may be replaced with a side channel.

Likewise, the user terminal in the present disclosure may be replaced with a base station. In this case, the base station may have the function of the user terminal.

The terms "determining" and "deciding" used in the present disclosure sometimes include various operations. "determining", "determining" can include, for example, determining, calculating, processing, deriving, investigating, searching in a table, a database, or another data structure, and confirming that "determining" is performed. Further, "determining" or "deciding" can include considering "determining" or "deciding" a reception (e.g., receiving information), a transmission (e.g., transmitting information), an input (input), an output (output), or an access (e.g., accessing data in a memory), or the like. Further, "determining" and "deciding" can include considering that "determining" and "deciding" are performed on solving (resolving), selecting (selecting), selecting (setting), establishing (establishing), comparing (comparing), and the like. That is, "judging" and "determining" can include considering that "judging" and "determining" are performed on any operation. Further, "judgment (decision)" may be replaced with "assumption", "expected", "regarded as" and the like.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or coupling between 2 or more elements, and can include 1 or more intervening elements between two elements that are "connected" or "coupled" to each other. The combination or connection of the elements may be physical, logical, or a combination thereof. For example, "connected" may also be replaced by "connected". As used in the disclosure, 2 elements can be considered to be "connected" or "joined" to each other using at least one of one or more of wires, cables, and printed electrical connections, and as several non-limiting and non-exhaustive examples, are "connected" or "joined" to each other using electromagnetic energy or the like having wavelengths in the wireless frequency domain, the microwave region, and the optical (both visible and invisible) region.

The Reference Signal can also be simply referred to as RS (Reference Signal), and may also be referred to as Pilot (Pilot) or the like according to the applied standard.

The description of "based on" as used in the present disclosure does not mean "based only on" unless otherwise explicitly stated. In other words, the expression "based on" means both "based on" and "based on" at least.

Any reference to elements using references to "first," "second," etc. in this disclosure is not intended to limit the amount or order of such elements in general. These designations can be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed, or that in some form the first element must precede the second element.

The "component" in the configuration of each device described above may be replaced by "unit", "circuit", "apparatus", or the like.

In the present disclosure, when "including", and variations thereof are used, these terms are meant to be inclusive in the same sense as the term "comprising". Further, the term "or" as used in this disclosure does not refer to a logical exclusive or.

In the present disclosure, where articles such as "a", "an", and "the" in english are added by translation, the case where a noun following these articles is plural form may also be included in the present disclosure.

In the present disclosure, the term "a and B are different" may also mean that "a and B are different from each other". In addition, the term also means that "A and B are respectively different from C". Terms such as "separate," coupled, "and the like may also be construed as" different.

The embodiments described in the present disclosure may be used alone, in combination, or switched with execution. Note that the notification of specific information (for example, notification of "X") is not limited to explicit notification, and may be performed implicitly (for example, notification of no specific information).

The present disclosure has been described in detail above, but it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present disclosure, which is determined based on the description of the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not intended to be in any limiting sense.

10. Base station

10A O-DU

10B O-RU

10C CU

110. Transmitting unit

120. Receiving unit

130. Setting unit

140. Control unit

1001. Processor and method for controlling the same

1002. Storage device

1003. Auxiliary storage device

1004. Communication device

1005. Input device

1006. Output device

Claims (6)

1. A communication device, comprising:

a transmission unit that transmits information indicating a range of amplification factors in which an amplifier of the apparatus can operate appropriately to other communication apparatuses;

A receiving unit that receives, from the other communication device, a sampling sequence of an in-phase component and a quadrature component of an OFDM (orthogonal frequency division multiplexing) signal of an amplification rate and a frequency domain set for the device; and

and a control unit that transmits a wireless signal to which an amplification factor set for the device based on the sampling sequence is applied.

2. The communication device of claim 1, wherein,

the information indicating the range of the magnification includes an upper limit value of the magnification and a lower limit value of the magnification, or an upper limit value of the magnification and an amplitude with reference to the upper limit value of the magnification.

3. The communication device of claim 1, wherein,

the information indicating the range of the magnification includes a plurality of the ranges of the magnification.

4. The communication device of claim 1, wherein,

the transmitting unit transmits information indicating the range of the amplification factor to each antenna of the communication apparatus or each communication apparatus to the other communication apparatus.

5. A communication device, comprising:

a receiving unit that receives, from another communication apparatus, information indicating a range of an amplification factor at which an amplifier of the other communication apparatus can operate appropriately;

A control unit configured to determine an amplification factor set for the other communication apparatus based on information indicating a range of the amplification factor; and

and a transmitting unit configured to transmit the determined sampling sequences of an in-phase component and a quadrature component of an OFDM (orthogonal frequency division multiplexing) signal in the amplification and frequency domain to the other communication apparatus.

6. A communication method, performed by a communication device:

a transmission step of transmitting information indicating a range of an amplification factor at which an amplifier of the apparatus can operate appropriately to other communication apparatuses;

a reception step of receiving, from the other communication device, a sampling sequence of an in-phase component and a quadrature component of an OFDM (orthogonal frequency division multiplexing) signal of an amplification rate and a frequency domain set for the device; and

and a control step of transmitting a wireless signal to which an amplification factor set for the device based on the sampling sequence is applied.