Control device, control method, and program

Abstract

Provided is a control device comprising: a calibration execution unit that transmits and receives a calibration signal between a first antenna device and a second antenna device that perform coordinated control, identifies a phase shift between the first antenna device and the second antenna device, and causes adjustment for reducing the phase shift to be performed; and an adjustment unit that estimates, on the basis of time information about when the calibration was executed and the identified phase shift, the phase shift during a period until the next calibration is executed after the calibration execution unit has executed the calibration between the first antenna device and the second antenna device, and performs adjustment for reducing the estimated phase shift. The control device can execute RAN control and AI processing (including RAN control AI processing such as a RAN intelligent controller (RIC), and non-RAN control AI processing).

Claims

1. A control device comprising: a calibration execution unit that performs calibration by sending calibration signals of radio waves with a preset phase between a first antenna device and a second antenna device that perform coordinated control, thereby identifying a phase difference between the first antenna device and the second antenna device, and causing at least one of the first antenna device and the second antenna device to perform adjustments to reduce the phase difference; and an adjustment unit that, based on the time information of the calibration performed and the phase difference identified in the calibration, estimates the phase difference between the first antenna device and the second antenna device after the calibration execution unit has performed the calibration between the first antenna device and the second antenna device, and performs adjustments to reduce the estimated phase difference between the first antenna device and the second antenna device.

2. The control device according to claim 1, further comprising: a learning data storage unit that stores learning data including time information of the calibration performed between the first antenna device and the second antenna device, and the phase shift identified in the calibration; and a learning model generation unit that uses a plurality of the learning data to generate a learning model that takes at least time information as input and outputs the phase shift, wherein the adjustment unit estimates the phase shift between the first antenna device and the second antenna device by using the learning model.

3. The control device according to claim 2, wherein the learning model generation unit generates the learning model by further inputting the position information of the first antenna device and the position information of the second antenna device.

4. The control device according to claim 2 or 3, wherein the learning data storage unit stores the learning data which further includes environmental information indicating the environment of the first antenna device and the environment of the second antenna device when the calibration was performed, and the learning model generation unit generates the learning model which further takes the environmental information as input.

5. The control device according to claim 4, wherein the environmental information includes information on the temperature of the hardware of the first antenna device and the temperature of the hardware of the second antenna device.

6. The control device according to any one of claims 2 to 5, wherein the learning data storage unit stores the learning data, which further includes alarm information generated in the first antenna device and the second antenna device when the calibration is performed, and the learning model generation unit generates the learning model, which further takes the alarm information as input.

7. The control device according to any one of claims 2 to 6, further comprising a model update unit that, when the calibration execution unit performs the calibration, performs estimation of the phase shift using the learning model and updates the learning model using the estimated phase shift and the phase shift identified in the calibration.

8. The control device according to any one of claims 2 to 7, wherein the calibration execution unit performs the calibration for each of a plurality of combinations of two antenna devices from a plurality of antenna devices including the first antenna device and the second antenna device; the learning data storage unit stores learning data for each of the plurality of combinations, including time information of when the calibration was performed and the phase shift identified in the calibration; the learning model generation unit generates the learning model using the plurality of learning data; and the scheduling unit further comprises a scheduling unit that estimates the phase shift for each of the plurality of combinations using the learning model and schedules the calibration for each of the plurality of combinations based on the estimation results.

9. The control device according to claim 8, wherein the scheduling unit prioritizes scheduling the calibration of the combination among the plurality of combinations in which the estimated phase shift is larger.

10. The control device according to claim 8 or 9, wherein the scheduling unit prioritizes scheduling the combination among the plurality of combinations that has a lower estimation accuracy of the phase shift.

11. A control method comprising: a calibration execution step of performing a calibration in which a calibration is performed between a first antenna device and a second antenna device that perform cooperative control, by sending calibration signals of radio waves with a preset phase to each other to identify a phase difference between the first antenna device and the second antenna device, and causing at least one of the first antenna device and the second antenna device to perform an adjustment to reduce the phase difference; and an adjustment step of estimating the phase difference between the time information of the calibration performed and the phase difference identified in the calibration, and performing an adjustment to reduce the estimated phase difference between the first antenna device and the second antenna device after the calibration performed in the calibration execution step and until the next calibration is performed between the first antenna device and the second antenna device.

12. A program for causing a computer to execute the control method described in claim 11.

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