Information processing device, radio base station, program, and information processing method

Abstract

Provided is an information processing device which is mounted on a radio base station that is a control target of a RAN control function for controlling a RAN function by executing AI processing (RAN Intelligent Controller (RIC)) and the like. The information processing device: generates a plurality of subcarrier signals by respectively subcarrier-modulating a plurality of pieces of user data that are to be transmitted to the outside; generates a plurality of pieces of signal waveform information corresponding to the plurality of subcarrier signals by performing inverse Fourier transform on the plurality of subcarrier signals individually; corrects at least one subcarrier signal among the plurality of subcarrier signals on the basis of the plurality of pieces of signal waveform information such that a signal waveform of a composite signal generated from the plurality of pieces of user data changes more continuously; and generates a composite signal by performing inverse Fourier transform collectively on the plurality of subcarrier signals including the at least one corrected subcarrier signal.

Claims

1. An information processing device comprising: a user data acquisition unit that acquires a plurality of user data to be transmitted externally; a subcarrier signal generation unit that generates a plurality of subcarrier signals by subcarrier modulating each of the plurality of user data; a signal waveform information generation unit that generates a plurality of signal waveform information corresponding to the plurality of subcarrier signals by individually performing an inverse Fourier transform on the plurality of subcarrier signals; a correction unit that corrects at least one of the plurality of subcarrier signals based on the plurality of signal waveform information so that the signal waveform of the composite signal generated from the plurality of user data becomes more continuous; and a composite signal generation unit that generates the composite signal by performing an inverse Fourier transform on the plurality of subcarrier signals, including the at least one subcarrier signal corrected by the correction unit, all at once.

2. The information processing apparatus according to claim 1, wherein the correction unit corrects the at least one subcarrier signal that satisfies predetermined EVM (Error Vector Magnitude: EVM) conditions.

3. The information processing apparatus according to claim 1 or 2, wherein the correction unit corrects at least one subcarrier signal so that the peak-to-average power ratio (PAPR) of the composite signal satisfies predetermined PAPR conditions.

4. The information processing apparatus according to any one of claims 1 to 3, wherein the correction unit further corrects the at least one subcarrier signal based on the modulation scheme of the subcarrier modulation of each of the plurality of user data.

5. The information processing apparatus according to claim 4, wherein, if there are two or more subcarrier signals that can be corrected among the plurality of subcarrier signals, the correction unit preferentially selects a subcarrier signal that is subcarrier modulated with a modulation scheme that has fewer bits per symbol among the two or more correctable subcarrier signals as the subcarrier signal to be corrected, and corrects the selected subcarrier signal to correct at least one subcarrier signal.

6. The information processing apparatus according to any one of claims 1 to 5, wherein the correction unit corrects the at least one subcarrier signal by correcting the phase of the at least one subcarrier signal.

7. The information processing apparatus according to any one of claims 1 to 5, wherein the correction unit corrects the at least one subcarrier signal by correcting the amplitude of the at least one subcarrier signal.

8. The information processing apparatus according to any one of claims 1 to 5, wherein the correction unit corrects the at least one subcarrier signal by correcting both the phase and amplitude of the at least one subcarrier signal.

9. Information processing apparatus according to any one of claims 1 to 8, comprising: a learning data storage unit that stores learning data including a plurality of user data to be transmitted externally, signal correction amount data indicating a signal correction amount obtained by correcting at least one subcarrier signal among a plurality of subcarrier signals obtained by subcarrier modulating each of the plurality of user data contained in the input data, the plurality of learning data stored in the learning data storage unit as training data, and a model generation unit that generates a decision model by machine learning to determine a signal correction amount to correct at least one subcarrier signal among a plurality of subcarrier signals obtained by subcarrier modulating each of the plurality of user data contained in the input data, the plurality of user data to be transmitted externally, such that the PAPR of the composite signal generated from the plurality of user data contained in the input data becomes smaller, and the correction unit determines a signal correction amount to correct the at least one subcarrier signal from the input data, the plurality of user data, using the plurality of learning data stored in the learning data storage unit as training data, and corrects the at least one subcarrier signal according to the determined signal correction amount.

10. A wireless base station comprising an information processing device according to any one of claims 1 to 9, and an antenna that outputs radio waves for transmitting the composite signal.

11. A program, when executed by a computer, that causes the computer to function as an information processing device according to any one of claims 1 to 9.

12. An information processing method performed by a computer, comprising: a user data acquisition step of acquiring a plurality of user data to be transmitted to an external source; a subcarrier signal generation step of generating a plurality of subcarrier signals by subcarrier modulating each of the plurality of user data; a signal waveform information generation step of generating a plurality of signal waveform information corresponding to the plurality of subcarrier signals by individually performing an inverse Fourier transform on the plurality of subcarrier signals; a correction step of correcting at least one of the plurality of subcarrier signals based on the plurality of signal waveform information so that the signal waveform of the composite signal generated from the plurality of user data becomes more continuous; and a composite signal generation step of generating the composite signal by performing an inverse Fourier transform on the plurality of subcarrier signals, including the at least one subcarrier signal corrected in the correction step, all at once.

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