Control device, program, and system

Abstract

Provided is a control device including: a weather forecast data acquisition unit that acquires, for each of a plurality of wireless devices disposed on the ground, weather forecast data that forecasts a weather between a wireless device among the plurality of wireless devices and a wireless device among the plurality of wireless devices that is able to establish an optical wireless communication connection; a communication association information reception unit that receives, from each of the plurality of wireless devices, communication association information associated with a communication of the wireless device; a switching determination unit that determines whether to switch a connection destination of the optical wireless communication connection of the wireless device based on the weather forecast data between the wireless device and the wireless device among the plurality of wireless devices that establishes the optical wireless communication connection; and a connection destination selection unit that, in response to the switching determination unit determining to switch the connection destination of the optical wireless communication connection of the wireless device, selects the connection destination of the optical wireless communication connection of the wireless device based on the weather forecast data and the communication association information of each of the plurality of wireless devices.

Description

TECHNICAL FIELD

[0001] The present application relates to a control device, a program, and a system. BACKGROUND

[0002] In Patent Literature 1, a HAPS (High Altitude Platform Station) is described that relays communication between a gateway mounted on a mobile body and a terminal on the ground to provide a wireless communication service to the terminal by establishing a feeder link with the gateway and a service link with the terminal.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent No. 7129538 SUMMARY

[0006] According to an embodiment aspect of the present application, a control device is provided. The control device can include a weather forecast data acquisition section that acquires, for each of a plurality of wireless devices provided on the ground, weather forecast data that forecasts a weather between a wireless device and a wireless device with which the wireless device can establish an optical wireless communication connection among the plurality of wireless devices. The control device can include a communication association information reception section that receives, from each of the plurality of wireless devices, communication association information associated with communication of the wireless device. The control device can include a switching determination section that determines whether to switch a connection destination of an optical wireless communication connection of the wireless device based on the weather forecast data between the wireless device and a wireless device with which the wireless device has established an optical wireless communication connection among the plurality of wireless devices. The control device can include a connection destination selection section that, in response to the switching determination section determining to switch the connection destination of the optical wireless communication connection of the wireless device, selects, based on the weather forecast data and the communication association information of each of the plurality of wireless devices, a connection destination of the optical wireless communication connection of the wireless device and a connection destination of an optical wireless communication connection of another wireless device among the plurality of wireless devices for which the connection destination of the optical wireless communication connection needs to be switched. The control device can include a wireless device control section that causes the plurality of wireless devices to switch the connection destination of the optical wireless communication connection based on a selection result of the connection destination selection section.

[0007] In the control device, the connection-destination selection section can select, as the connection destination of the optical wireless communication connection of the one wireless device, a wireless device that satisfies a predetermined good-weather condition with the one wireless device among a plurality of wireless devices that the one wireless device can establish an optical wireless communication connection with, based on the weather forecast data between the one wireless device and the wireless device.

[0008] In either control device, the communication-association-information reception section can receive the communication-association information including operation rate information indicating a rate of a period in which a wireless device was in normal operation in a predetermined period, and the connection-destination selection section can select, as the connection destination of the optical wireless communication connection of the one wireless device, a wireless device having the highest operation rate among a plurality of wireless devices that satisfy the good-weather condition with the one wireless device, based on the weather forecast data.

[0009] In any of the control apparatuses, the communication-related information receiving section can receive the communication-related information including available bandwidth information indicating a bandwidth available to the wireless device in optical wireless communication, and the connection destination selecting section can select, in a case where a plurality of the wireless devices for which the weather prediction data satisfies the good-weather condition exist, a wireless device for which a bandwidth available is widest among the plurality of the wireless devices for which the weather prediction data satisfies the good-weather condition as the connection destination of the optical wireless communication connection by the one wireless device. In any of the control apparatuses, the communication-related information receiving section can receive the communication-related information including action rate information indicating a rate of a period in which a wireless device has been in action in a predetermined period, and the connection destination selecting section can select, among a plurality of the wireless devices for which the one wireless device can establish an optical wireless communication connection, a wireless device for which the weather prediction data between the one wireless device and the wireless device satisfies a predetermined good-weather condition as the connection destination of the optical wireless communication connection by the one wireless device, and in a case where a plurality of the wireless devices for which the weather prediction data satisfies the good-weather condition exist, can select a wireless device for which an action rate is lowest among the plurality of the wireless devices for which the weather prediction data satisfies the good-weather condition as the connection destination of the optical wireless communication connection by the one wireless device. In any of the control apparatuses, the communication-related information receiving section can receive the communication-related information including transmitter maximum output power information indicating a maximum output power of a transmitter mounted on a wireless device, and the connection destination selecting section can select, among a plurality of the wireless devices for which the one wireless device can establish an optical wireless communication connection, a wireless device for which the weather prediction data between the one wireless device and the wireless device satisfies a predetermined good-weather condition as the connection destination of the optical wireless communication connection by the one wireless device, and in a case where a plurality of the wireless devices for which the weather prediction data satisfies the good-weather condition exist, can select a wireless device for which a maximum output power of the transmitter mounted on the wireless device is highest among the plurality of the wireless devices for which the weather prediction data satisfies the good-weather condition as the connection destination of the optical wireless communication connection by the one wireless device.

[0010] In any of the control apparatuses, the wireless device control section can cause the one wireless device that switches the connection destination of the optical wireless communication connection to establish a radio wave communication connection between the one wireless device and a wireless device among the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection. In any of the control apparatuses, the communication association information reception section can receive the communication association information of the one wireless device including allocation bandwidth information indicating a bandwidth allocated to communication between the one wireless device and a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched, and the communication association information of the one wireless device including allocation bandwidth information indicating a bandwidth allocated to communication between the one wireless device and a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched, and the control apparatus can further include an establishment determination section that determines whether or not to cause the one wireless device to establish a radio wave communication connection based on the communication association information of the one wireless device before the connection destination of the optical wireless communication connection is switched and the communication association information of the one wireless device after the connection destination of the optical wireless communication connection is switched, and the wireless device control section can cause the one wireless device to establish a radio wave communication connection between the one wireless device and the wireless device with which the one wireless device is able to establish a radio wave communication connection in response to the establishment determination section determining to cause the one wireless device to establish a radio wave communication connection, and the establishment determination section can determine to cause the one wireless device to establish a radio wave communication connection when the bandwidth allocated to communication between the one wireless device after the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device and the bandwidth allocated to communication between the one wireless device before the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device is narrower than a predetermined bandwidth threshold.In any of the control apparatuses, the communication association information receiving section can receive: the communication association information of the one wireless device including reception signal strength information indicating a reception signal strength of a signal received by the one wireless device from a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device, before a change in the connection destination of the optical wireless communication connection; and the communication association information of the one wireless device including reception signal strength information indicating a reception signal strength of a signal received by the one wireless device from a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device, after the change in the connection destination of the optical wireless communication connection, the control apparatus can further include an establishment determination section that determines whether or not to cause the one wireless device to establish a radio wave communication connection, based on the communication association information of the one wireless device before the change in the connection destination of the optical wireless communication connection and the communication association information of the one wireless device after the change in the connection destination of the optical wireless communication connection, the wireless device control section can cause the one wireless device to establish a radio wave communication connection between the one wireless device and the wireless device with which the one wireless device can establish a radio wave communication connection, in response to the establishment determination section determining to cause the one wireless device to establish a radio wave communication connection, and the establishment determination section can determine to cause the one wireless device to establish a radio wave communication connection, in a case where the reception signal strength of the signal received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the change in the connection destination of the optical wireless communication connection is lower than a predetermined reception signal strength threshold, compared to the reception signal strength of the signal received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the change in the connection destination of the optical wireless communication connection.In any of the control apparatuses, the communication-related information receiving section can receive: the communication-related information of the one wireless device including delay information indicating a delay of communication between the one wireless device and a wireless device that is a connection destination of optical wireless communication connection of the one wireless device before a connection destination of the optical wireless communication connection is switched; and the communication-related information of the one wireless device including delay information indicating a delay of communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched, and the control apparatus can further include an establishment determination section that determines whether or not the one wireless device is to establish a radio wave communication connection based on the communication-related information of the one wireless device before the connection destination of the optical wireless communication connection is switched and the communication-related information of the one wireless device after the connection destination of the optical wireless communication connection is switched, and the wireless device control section can cause the one wireless device to establish the radio wave communication connection between the one wireless device and the wireless device with which the one wireless device is able to establish the radio wave communication connection in response to the establishment determination section determining that the one wireless device is to establish the radio wave communication connection, and the establishment determination section can determine that the one wireless device is to establish the radio wave communication connection when the delay of communication between the one wireless device after the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device is longer than a predetermined delay threshold than the delay of communication between the one wireless device before the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device.In any of the control apparatuses, the communication-related information receiving section can receive: the communication-related information of the one wireless device including jitter information indicating variation, i.e., jitter, of delay per unit time of communication between the one wireless device and a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched; and the communication-related information of the one wireless device including jitter information indicating variation, i.e., jitter, of delay per unit time of communication between the one wireless device and a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched, the control apparatus can further include an establishment determination section that determines whether or not the one wireless device is to establish a radio wave communication connection based on the communication-related information of the one wireless device before the connection destination of the optical wireless communication connection is switched and the communication-related information of the one wireless device after the connection destination of the optical wireless communication connection is switched, the wireless device control section can cause the one wireless device to establish a radio wave communication connection between the one wireless device and the wireless device with which the one wireless device is able to establish a radio wave communication connection in response to the establishment determination section determining that the one wireless device is to establish a radio wave communication connection, and the establishment determination section can determine that the one wireless device is to establish a radio wave communication connection when the jitter of communication between the one wireless device after the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device is greater than a predetermined jitter threshold than the jitter of communication between the one wireless device before the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device.In any of the control apparatuses, the communication association information receiving section can receive: the communication association information of the one wireless device including error rate information indicating a ratio of error data in data received by the one wireless device from a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device, before the connection destination of the optical wireless communication connection is switched; and the communication association information of the one wireless device including error rate information indicating a ratio of error data in data received by the one wireless device from a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device, after the connection destination of the optical wireless communication connection is switched, the control apparatus can further include an establishment determination section that determines whether or not the one wireless device is to establish a radio wave communication connection, based on the communication association information of the one wireless device before the connection destination of the optical wireless communication connection is switched and the communication association information of the one wireless device after the connection destination of the optical wireless communication connection is switched, the wireless device control section can cause the one wireless device to establish a radio wave communication connection between the one wireless device and the wireless device with which the one wireless device can establish a radio wave communication connection, in response to the establishment determination section determining that the one wireless device is to establish a radio wave communication connection, and the establishment determination section can determine that the one wireless device is to establish a radio wave communication connection, in a case where the error rate of data received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined error rate threshold, compared to the error rate of data received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched.In any of the control apparatuses, the communication association information receiving section can receive: the communication association information of the one wireless device including packet loss rate information indicating a ratio of data packets lost among data packets transmitted by the one wireless device to a wireless device that is a connection destination of the optical wireless communication connection of the one wireless device before a connection destination of the optical wireless communication connection is switched; and the communication association information of the one wireless device including packet loss rate information indicating a ratio of data packets lost among data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched, the control apparatus can further include an establishment determination section that determines whether or not the one wireless device is to establish a radio wave communication connection based on the communication association information of the one wireless device before the connection destination of the optical wireless communication connection is switched and the communication association information of the one wireless device after the connection destination of the optical wireless communication connection is switched, the wireless device control section can cause the one wireless device to establish a radio wave communication connection between the one wireless device and the wireless device with which the one wireless device is able to establish a radio wave communication connection in response to the establishment determination section determining that the one wireless device is to establish a radio wave communication connection, and the establishment determination section can determine that the one wireless device is to establish a radio wave communication connection when the packet loss rate of data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined packet loss rate threshold value compared to the packet loss rate of data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched.

[0011] In any of the control apparatuses, the communication association information receiving section can receive: the communication association information of the one wireless device including packet loss rate information indicating a ratio of data packets lost among data packets transmitted by the one wireless device to a wireless device that is a connection destination of the optical wireless communication connection of the one wireless device before a connection destination of the optical wireless communication connection is switched; and the communication association information of the one wireless device including packet loss rate information indicating a ratio of data packets lost among data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched, the control apparatus can further include an establishment determination section that determines whether or not the one wireless device is to establish a radio wave communication connection based on the communication association information of the one wireless device before the connection destination of the optical wireless communication connection is switched and the communication association information of the one wireless device after the connection destination of the optical wireless communication connection is switched, the wireless device control section can cause the one wireless device to establish a radio wave communication connection between the one wireless device and the wireless device with which the one wireless device is able to establish a radio wave communication connection in response to the establishment determination section determining that the one wireless device is to establish a radio wave communication connection, and the establishment determination section can determine that the one wireless device is to establish a radio wave communication connection when the packet loss rate of data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined packet loss rate threshold value compared to the packet loss rate of data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched.

[0012] In any of the control apparatuses, the communication association information receiving section can receive, after a connection destination of the optical wireless communication connection is switched, the communication association information of the one wireless device including allocation bandwidth information indicating a bandwidth allocated to communication between the one wireless device and a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device, the establishment determination section can determine to cause the one wireless device to establish the radio wave communication connection in a case where the bandwidth allocated to the communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is narrower than a predetermined bandwidth threshold. In any of the control apparatuses, the communication association information receiving section can receive, after a connection destination of the optical wireless communication connection is switched, the communication association information of the one wireless device including reception signal strength information indicating a reception signal strength of a signal received by the one wireless device from a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device, the establishment determination section can determine to cause the one wireless device to establish the radio wave communication connection in a case where the reception signal strength of the signal received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is lower than a predetermined reception signal strength threshold. In any of the control apparatuses, the communication association information receiving section can receive, after a connection destination of the optical wireless communication connection is switched, the communication association information of the one wireless device including delay information indicating a delay of communication between the one wireless device and a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device, the establishment determination section can determine to cause the one wireless device to establish the radio wave communication connection in a case where the delay of the communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is longer than a predetermined delay threshold. In any of the control apparatuses, the communication association information receiving section can receive, after a connection destination of the optical wireless communication connection is switched, the communication association information of the one wireless device including jitter information indicating jitter of a delay per unit time of communication between the one wireless device and a wireless device that is the connection destination of the optical wireless communication connection of the one wireless device, the establishment determination section can determine to cause the one wireless device to establish the radio wave communication connection in a case where the jitter of the communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is greater than a predetermined jitter threshold.In any of the control apparatuses, the communication-related information receiving section can receive, from the one wireless device, communication-related information of the one wireless device including error rate information indicating a ratio of error data in data received by the one wireless device from a wireless device that is a connection destination of optical wireless communication connection of the one wireless device after a connection destination of the optical wireless communication connection is switched, and the establishment determination section can determine that the one wireless device is to establish a radio wave communication connection in a case where the error rate of data received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined error rate threshold. In any of the control apparatuses, the communication-related information receiving section can receive, from the one wireless device, communication-related information of the one wireless device including packet loss rate information indicating a ratio of data packets lost in data packets transmitted by the one wireless device to a wireless device that is a connection destination of optical wireless communication connection of the one wireless device after a connection destination of the optical wireless communication connection is switched, and the establishment determination section can determine that the one wireless device is to establish a radio wave communication connection in a case where the packet loss rate of data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined packet loss rate threshold.

[0013] In any of the control apparatuses, the connection destination selection section can further select, from the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection, a connection destination of a radio wave communication connection of the one wireless device on the basis of the weather forecast data between the one wireless device and each of the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection and the communication-related information of each of the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection, and the wireless device control section can cause the one wireless device to establish a radio wave communication connection between the one wireless device and a wireless device selected by the connection destination selection section as the connection destination of the radio wave communication connection of the one wireless device.

[0014] In any of the control apparatuses, the wireless device control section can cause the one wireless device to use a plurality of transceivers mounted on the one wireless device for establishing an optical wireless communication connection, to establish the optical wireless communication connection between the one wireless device and the wireless device selected as the connection destination of the optical wireless communication connection by the connection destination selection section, thereby causing the one wireless device to switch the connection destination of the optical wireless communication connection, in a case where the one wireless device is capable of using the plurality of transceivers for communication with the wireless device selected as the connection destination of the optical wireless communication connection by the connection destination selection section.

[0015] The control apparatus can further include a learning data holding section that holds learning data including the weather forecast data between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection among the plurality of wireless devices and reception signal strength information indicating a reception signal strength of a signal received by the one wireless device from the wireless device with which the one wireless device has established the optical wireless communication connection during a prediction period of the weather forecast data, and a model generation section that generates, by machine learning, an inference model that infers a reception signal strength of a signal received by the one wireless device from the wireless device with which the one wireless device has established the optical wireless communication connection during a prediction period of weather forecast data between the one wireless device and the wireless device using a plurality of the learning data held in the learning data holding section as training data, and the switching determination section can determine to switch the connection destination of the optical wireless communication connection of the one wireless device in a case where the reception signal strength of the signal received by the one wireless device from the wireless device with which the one wireless device has established the optical wireless communication connection during the prediction period of the weather forecast data is inferred from the weather forecast data between the one wireless device and the wireless device using the inference model generated by the model generation section and the inferred reception signal strength is lower than a predetermined reception signal strength threshold value.

[0016] According to an embodiment aspect of the present invention, there is provided a program for causing a computer to function as the control apparatus.

[0017] According to an embodiment aspect of the present invention, there is provided a system. The system can include the control apparatus. The system can include the plurality of wireless devices.

[0018] Note that the above summary is not intended to list all essential features of the present invention. Also, sub-combinations of these feature groups can also be additional inventions. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 An example of the system 10 is schematically shown.

[0020] Figure 2 An example of a communication network composed of a plurality of wireless devices is schematically shown.

[0021] Figure 3 Another example of a communication network composed of a plurality of wireless devices is schematically shown.

[0022] Figure 4 is a diagram for illustrating an example in which the control device 100 causes a wireless device to switch a connection destination of an optical wireless communication connection.

[0023] Figure 5 is a diagram for illustrating another example in which the control device 100 causes a wireless device to switch a connection destination of an optical wireless communication connection.

[0024] Figure 6 is a diagram for illustrating another example in which the control device 100 causes a wireless device to switch a connection destination of an optical wireless communication connection.

[0025] Figure 7 An example of a functional configuration of the control device 100 is schematically shown.

[0026] Figure 8 is a diagram for illustrating an example in which the control device 100 determines whether to switch a connection destination of an optical wireless communication connection of a wireless device.

[0027] Figure 9 is a diagram for illustrating an example of a processing flow of the control device 100.

[0028] Figure 10 is a diagram for illustrating another example of a processing flow of the control device 100.

[0029] Figure 11 An example of a hardware configuration of a computer 1200 that functions as the control device 100 is schematically shown. DETAILED DESCRIPTION

[0030] In a case where a wireless transmission line is established between the ground surfaces using high-frequency electromagnetic waves such as laser light and millimeter waves, the wireless transmission line is sometimes difficult to maintain depending on weather conditions. Therefore, in order to improve the operation rate of a wireless transmission network constructed by a plurality of wireless transmission lines, it is necessary to dynamically avoid adverse weather such as rain that adversely affects the wireless transmission network. The system 10 according to the present embodiment adopts, for example, a mechanism of acquiring weather forecast data that forecasts weather of an area including the wireless transmission network, setting priorities in advance for each candidate transmission path of the wireless transmission network based on the acquired weather forecast data, and switching to a candidate transmission path having the highest priority, where the wireless transmission network is constructed by a plurality of wireless stations each having a plurality of optical wireless transmission lines provided on ground surfaces.

[0031] Hereinafter, the present application will be described through embodiments of the application, but the following embodiments do not limit the application covered by the claims. In addition, the combination of features described in the embodiments is not necessarily all required for the solution of the application.

[0032] Figure 1 An example of the system 10 is schematically illustrated. The system 10 can include a control device 100. The system 10 can include a plurality of wireless devices provided on ground surfaces. In Figure 1 In the present embodiment, an example in which the system 10 includes four wireless devices, i.e., a wireless device 210, a wireless device 220, a wireless device 230, and a wireless device 240 is illustrated. The number of wireless devices included in the system 10 is not limited to four, and can be another number. The system 10 can include a weather data server 500.

[0033] The control device 100 controls the plurality of wireless devices respectively. The control device 100 controls the plurality of wireless devices respectively, for example, by transmitting a control signal to each of the plurality of wireless devices via a network 20.

[0034] The network 20 can include a core network provided by a communication carrier. The core network, for example, complies with a 5G (5th Generation) communication system. The core network can also comply with a 6G (6th Generation) communication system and a mobile communication system thereafter. The core network can also comply with a 3G (3rd Generation) communication system. The core network can also comply with an LTE (Long Term Evolution) communication system. The network 20 can also include the Internet. The network 20 can also include a wire.

[0035] The wireless devices form a wireless communication area and provide a wireless communication service to a communication terminal in the wireless communication area. In Figure 1In the example, one example in which the wireless device 210 provides the wireless communication service to the communication terminal 300, and the wireless device 240 provides the wireless communication service to the communication terminal 400 is illustrated.

[0036] The wireless device is connected to the network 20, for example, via a mobile body communication connection. By the wireless device being connected to the network 20 via the mobile body communication connection, in an area in which a communication infrastructure such as an optical fiber is not sufficiently laid, it is possible to set up the wireless device at a low cost, compared to a case in which a new communication infrastructure is laid. The wireless device is connected to the network 20, for example, via an Internet connection. The wireless device can also be connected to the network 20 via a wired connection.

[0037] The control device 100 constructs, for example, a communication network constituted by a plurality of wireless devices. In the example, one example in which the control device 100 constructs a communication network constituted by the wireless device 210, the wireless device 220, the wireless device 230, and the wireless device 240 is illustrated. Figure 1

[0038] The communication network is constructed, for example, in an area in which a communication infrastructure is not sufficiently laid. The communication network is constructed, for example, in an area in which a backup of a communication path of the network 20 is required. The communication network can also be constructed in any other area.

[0039] The communication network includes, for example, a mesh network. The communication network can also include a network of any other topology.

[0040] The control device 100 constructs, for example, the communication network by causing each of the plurality of wireless devices to establish an optical wireless communication connection between wireless devices with which each of the plurality of wireless devices is able to establish an optical wireless communication connection. The control device 100 causes, for example, the wireless devices to establish the optical wireless communication connection by controlling transceivers mounted on the wireless devices for establishing the optical wireless communication connection. The transceiver has, for example, a laser that outputs an optical signal, and a photodetector that detects laser light.

[0041] The control device 100 controls, for example, the orientation of the transceiver. The control device 100 controls, for example, the orientation of the transceiver by controlling a gimbal on which the transceiver is mounted. The control device 100 can also control the orientation of the transceiver in any other way.

[0042] The control device 100 controls, for example, the orientation of the transceiver mounted on the wireless device so that the laser of the transceiver mounted on the wireless device irradiates an optical signal toward the transceiver mounted on a wireless device with which the wireless device is able to establish an optical wireless communication connection. The control device 100 controls, for example, the orientation of the transceiver mounted on the wireless device so that the photodetector of the transceiver mounted on the wireless device receives an optical signal irradiated from the transceiver mounted on a wireless device with which the wireless device is able to establish an optical wireless communication connection.

[0043] In the example, one example in which the wireless device 210 provides the wireless communication service to the communication terminal 300, and the wireless device 240 provides the wireless communication service to the communication terminal 400 is illustrated. Figure 1 ​The diagram illustrates an example where control device 100 establishes an optical wireless communication connection between wireless device 210 and wireless device 220 by controlling transceiver 212 of wireless device 210 and transceiver 222 of wireless device 220 respectively; establishes an optical wireless communication connection between wireless device 220 and wireless device 230 by controlling transceiver 224 of wireless device 220 and transceiver 234 of wireless device 230 respectively; establishes an optical wireless communication connection between wireless device 230 and wireless device 240 by controlling transceiver 232 of wireless device 230 and transceiver 242 of wireless device 240 respectively; and establishes an optical wireless communication connection between wireless device 240 and wireless device 210 by controlling transceiver 244 of wireless device 240 and transceiver 214 of wireless device 210 respectively.

[0044] Communication terminals 300 and 400 can be any type of communication terminal if they can utilize wireless communication services provided by wireless devices. For example, communication terminals 300 and 400 can be mobile phones such as smartphones, tablets, and wearable devices. Communication terminals 300 and 400 can also be PCs (Personal Computers). Communication terminals 300 and 400 can be IoT (Internet of Things) terminals. Communication terminals 300 and 400 can include all devices belonging to the IoE (Internet of Everything).

[0045] Communication terminal 300 communicates with communication terminal 400, for example, via a communication network consisting of multiple wireless devices. Figure 1 In the illustrated communication network, the communication terminal 300 communicates with the communication terminal 400 via, for example, a mobile communication connection between the communication terminal 300 and the wireless device 210, an optical wireless communication connection between the wireless device 210 and the wireless device 240, and a mobile communication connection between the wireless device 240 and the communication terminal 400.

[0046] Control device 100 receives, for example, communication association information associated with communication between multiple wireless devices from each of the multiple wireless devices via network 20. Control device 100 periodically receives communication association information between the multiple wireless devices from each of the multiple wireless devices.

[0047] The communication-related information includes, for example, operation rate information indicating an operation rate that is a ratio of a period in which the wireless device has been normally operated to a predetermined period. The communication-related information includes, for example, available bandwidth information indicating a bandwidth that the wireless device can use in the optical wireless communication. The communication-related information includes allocation bandwidth information indicating a bandwidth allocated to communication between the wireless device and a wireless device that is a connection destination of the optical wireless communication connection of the wireless device. The communication-related information includes, for example, action rate information indicating an action rate that is a ratio of a period in which the wireless device has performed an action to a predetermined period. The communication-related information includes, for example, connection destination information indicating a wireless device that is a connection destination of the optical wireless communication connection of the wireless device. The communication-related information includes, for example, received signal strength information indicating a received signal strength (Received Signal Stength Indicator: RSSI) of a signal received by the wireless device from a wireless device that is a connection destination of the optical wireless communication connection of the wireless device. The communication-related information includes, for example, delay information indicating a delay of communication between the wireless device and a wireless device that is a connection destination of the optical wireless communication connection of the wireless device. The communication-related information includes, for example, jitter information indicating a jitter that is a variation of the delay per unit time of communication between the wireless device and a wireless device that is a connection destination of the optical wireless communication connection of the wireless device. The communication-related information includes, for example, error rate information indicating an error rate that is a ratio of error data in data received by the wireless device from a wireless device that is a connection destination of the optical wireless communication connection of the wireless device. The communication-related information can also include a packet loss rate information indicating a packet loss rate that is a ratio of lost data packets in data packets transmitted by the wireless device to a wireless device that is a connection destination of the optical wireless communication connection of the wireless device.

[0048] The control device 100 receives, for example, weather data of a region including a predetermined range of set positions of a plurality of wireless devices. The control device 100 receives, for example, weather data of the region from a weather data server 500 that manages the weather data via the network 20.

[0049] The weather data includes, for example, rainfall data indicating a rainfall amount per unit time. The weather data includes, for example, snowfall data indicating a snowfall amount per unit time. The weather data includes cloud base height data indicating a cloud base height of a cloud. The weather data includes, for example, visibility data indicating a visibility. The weather data includes, for example, humidity data indicating a humidity. The weather data includes, for example, air temperature data indicating an air temperature. The weather data includes, for example, atmospheric pressure data indicating an atmospheric pressure. The weather data includes, for example, wind speed data indicating a wind speed. The weather data can also include wind direction data indicating a wind direction.

[0050] The control device 100, for example, acquires weather forecast data that forecasts the weather of the area. The control device 100, for example, forecasts the weather of the area on the basis of weather data received from the weather data server 500, thereby acquiring the weather forecast data.

[0051] The control device 100, in a case where it is directly connected to at least one of the plurality of wireless devices that constitute the communication network, can also transmit a control signal to the wireless device via the communication network without via the network 20. In Figure 1 In the illustrated communication network, for example, in a case where the control device 100 that is directly connected to the wireless device 210 transmits a control signal to the wireless device 230, the control device 100 transmits the control signal to the wireless device 230 via the direct communication connection between the control device 100 and the wireless device 210, the optical wireless communication connection between the wireless device 210 and the wireless device 220, and the optical wireless communication connection between the wireless device 220 and the wireless device 230.

[0052] Figure 2 One example of a communication network constituted by a plurality of wireless devices is schematically shown. As illustrated in Figure 2 The wireless devices 210 to 290 each of which is equipped with two transceivers can be configured in a lattice shape. The lattice interval is, for example, about 1 to 10 km.

[0053] Figure 2 The illustrated communication network establishes optical wireless communication connections between the wireless device 210 and the wireless device 220, between the wireless device 210 and the wireless device 240, between the wireless device 220 and the wireless device 230, between the wireless device 240 and the wireless device 270, between the wireless device 250 and the wireless device 260, between the wireless device 250 and the wireless device 280, between the wireless device 260 and the wireless device 290, and between the wireless device 270 and the wireless device 280.

[0054] The control device 100, for example, acquires weather forecast data that forecasts the weather of the area. The control device 100, for example, forecasts the weather of the area on the basis of weather data received from the weather data server 500, thereby acquiring the weather forecast data. Figure 2 The illustrated communication network of the area. The control device 100 determines whether to switch the connection destination of the optical wireless communication connection of each of the wireless devices 210 to 290 on the basis of the acquired weather forecast data. The control device 100, for example, determines to switch the connection destination of the optical wireless communication connection of the wireless device in a case where the weather forecast data indicates that the weather between the wireless devices where the optical wireless communication connection is established is weather that adversely affects the optical wireless communication. Here, assuming that the control device 100 determines to switch the connection destination of the optical wireless communication connection of the wireless device 250 and the wireless device 260 because the weather forecast data indicates that the rain cloud 50 adversely affects the optical wireless communication connection between the wireless device 250 and the wireless device 260, the description will be continued.

[0055] For example, in response to a determination that the optical wireless communication connection between wireless device 250 and wireless device 260 needs to be switched, control device 100 selects the connection destination of the optical wireless communication connection of wireless device 250 from among wireless devices 210 to wireless devices 290, from which wireless device 250 can establish an optical wireless communication connection. Here, it is assumed that wireless device 250 can establish optical wireless communication connections with wireless device 220, which is adjacent to wireless device 250 to the north, wireless device 240, which is adjacent to wireless device 250 to the west, wireless device 260, which is adjacent to wireless device 250 to the east, and wireless device 280, which is adjacent to wireless device 250 to the south, and the description will continue.

[0056] Control device 100 selects the connection destination of the optical wireless communication connection of wireless device 250, for example, based on weather forecast data and the communication association information of wireless devices 220, 240, 260, and 280. Control device 100 selects the connection destination of the optical wireless communication connection of wireless device 250 in a manner that avoids the adverse effects of rain clouds 50 on the optical wireless communication. Here, we will continue the explanation assuming that control device 100 selects wireless device 220.

[0057] like Figure 2 As shown, wireless device 220 has established optical wireless communication connections with both wireless devices 210 and 230, utilizing its two transceivers. Therefore, in response to selecting wireless device 220 as the connection destination for the optical wireless communication connection of wireless device 250, control device 100 selects to disconnect the optical wireless communication connection from the optical wireless communication connection between wireless devices 210 and 220 and the optical wireless communication connection between wireless device 220 and 230. Here, we will continue the explanation assuming that control device 100 selects the optical wireless communication connection between wireless devices 210 and 220.

[0058] Subsequently, the control device 100 can select the connection destination for the optical wireless communication connection of wireless device 260 from among wireless devices 210 to 290, where wireless device 260 is capable of establishing an optical wireless communication connection. Here, we will continue the explanation assuming that wireless device 260 can establish an optical wireless communication connection with wireless device 230, which is adjacent to wireless device 260 to the north, wireless device 250, which is adjacent to wireless device 260 to the west, and wireless device 290, which is adjacent to wireless device 260 to the south.

[0059] The control device 100 selects a connection destination of the optical wireless communication connection of the wireless device 260, for example, based on weather forecast data and communication association information of each of the wireless device 230, the wireless device 250, and the wireless device 290. The control device 100 selects a connection destination of the optical wireless communication connection of the wireless device 260, for example, in a manner to avoid adverse effects of the rain cloud 50 on the optical wireless communication. Here, it is assumed that the control device 100 selects the wireless device 230, and the description will be continued.

[0060] The control device 100 causes the plurality of wireless devices to switch the connection destination of the optical wireless communication connection based on the above selection result. Specifically, as follows.

[0061] The control device 100 causes the wireless device 210 to switch the connection destination of the optical wireless communication connection so that the connection destination of the optical wireless communication connection of the wireless device 210 becomes the wireless device 240 from the wireless device 220 and the wireless device 240. The control device 100 causes the wireless device 220 to switch the connection destination of the optical wireless communication connection so that the connection destination of the optical wireless communication connection of the wireless device 220 becomes the wireless device 230 and the wireless device 250 from the wireless device 210 and the wireless device 230. The control device 100 causes the wireless device 230 to switch the connection destination of the optical wireless communication connection so that the connection destination of the optical wireless communication connection of the wireless device 230 becomes the wireless device 220 and the wireless device 260 from the wireless device 220. The control device 100 causes the wireless device 250 to switch the connection destination of the optical wireless communication connection so that the connection destination of the optical wireless communication connection of the wireless device 250 becomes the wireless device 220 and the wireless device 280 from the wireless device 260 and the wireless device 280. The control device 100 causes the wireless device 260 to switch the connection destination of the optical wireless communication connection so that the connection destination of the optical wireless communication connection of the wireless device 260 becomes the wireless device 230 and the wireless device 290 from the wireless device 230 and the wireless device 290. Thus, the control device 100 reconfigures the communication network exemplified in Figure 2

[0062] Figure 3 Another example of a communication network configured by a plurality of wireless devices is schematically shown. Figure 3 The communication network exemplified in Figure 2

[0063] Figure 3 ​​The illustrated communication network establishes optical wireless communication connections between the wireless device 210 and the wireless device 240, between the wireless device 220 and the wireless device 230, between the wireless device 220 and the wireless device 250, between the wireless device 230 and the wireless device 260, between the wireless device 240 and the wireless device 270, between the wireless device 250 and the wireless device 280, between the wireless device 260 and the wireless device 290, and between the wireless device 270 and the wireless device 280.

[0064] In wireless communication, the higher the frequency of electromagnetic waves, the faster the communication speed. For example, the communication speed of electric wave communication is about 100 Mbps, and the communication speed of optical wireless communication, which is higher in frequency than electric wave communication, is about 1 Gbps or more. Furthermore, unlike electric wave communication, optical wireless communication can be used in unlicensed. However, as a whole, the higher the frequency of electromagnetic waves, the more susceptible to adverse effects such as scattering and attenuation caused by water molecules, and thus optical wireless communication is more susceptible to adverse effects caused by water molecules than electric wave communication. In view of the above, it is desirable to improve the operation rate of a communication network by dynamically avoiding adverse effects on optical wireless communication caused by bad weather such as rain and fog while using optical wireless communication.

[0065] In view of this, according to the system 10 according to the present embodiment, the control device 100 determines whether to switch the connection destination of the optical wireless communication connection of one of the plurality of wireless devices based on weather forecast data of the area including the communication network constituted by the plurality of wireless devices. In response to determining to switch the connection destination of the optical wireless communication connection of one of the plurality of wireless devices, the control device 100 selects the connection destination of the optical wireless communication connection of one of the plurality of wireless devices and the connection destination of the optical wireless communication connection of the other of the plurality of wireless devices for which the connection destination of the optical wireless communication connection needs to be switched based on the weather forecast data and the communication association information of the plurality of wireless devices, and causes the plurality of wireless devices to switch the connection destination of the optical wireless communication connection. In a case where the weather forecast data indicates weather that adversely affects optical wireless communication, the wireless devices can be caused to switch the connection destination of the optical wireless communication connection, and thus the system 10 according to the present embodiment can improve the operation rate of the communication network by dynamically avoiding adverse effects on optical wireless communication caused by bad weather while using optical wireless communication.

[0066] Figure 4 is a diagram for explaining one example of the control device 100 causing the wireless devices to switch the connection destination of the optical wireless communication connection. It is assumed that Figure 4 The wireless devices illustrated in FIG. 8 are equipped with an antenna for establishing electric wave communication in addition to a transceiver.

[0067] Figure 4(A) of FIG. 1 schematically illustrates one example of a communication network constituted by the wireless device 210, the wireless device 220, the wireless device 230, and the wireless device 240. Figure 4 The communication network illustrated in (A) of FIG. 1 establishes optical wireless communication connections between the wireless device 210 and the wireless device 240, between the wireless device 220 and the wireless device 230, and between the wireless device 230 and the wireless device 240.

[0068] The control device 100 determines whether to switch the connection destination of the optical wireless communication connection of each of the wireless devices 210 to 240, for example, on the basis of weather forecast data of the area including the communication network. Figure 4 The control device 100 determines whether to switch the connection destination of the optical wireless communication connection of each of the wireless devices 210 to 240, for example, on the basis of weather forecast data of the area including the communication network. Here, it is assumed that the weather forecast data indicates that the rain cloud 50 adversely affects the optical wireless communication connection between the wireless device 210 and the wireless device 240, and thus the control device 100 determines to switch the connection destination of the optical wireless communication connection of the wireless device 210 from the wireless device 240 to the wireless device 220, and the description will be continued.

[0069] The control device 100 adds a communication path of radio wave communication to the communication network, for example, in a case where the control device 100 switches the connection destination of the optical wireless communication connection of the wireless device constituting the communication network. The radio wave communication is, for example, millimeter wave communication. The radio wave communication is, for example, microwave communication. The radio wave communication can also be wireless communication of another arbitrary frequency band. The control device 100 determines the communication path of the radio wave communication to be added to the communication network, for example, on the basis of weather forecast data of the area including the communication network.

[0070] The control device 100 establishes a radio wave communication connection by controlling an antenna mounted on one of the wireless devices, for example, in order to add the determined communication path of the radio wave communication to the communication network. The control device 100 can control the antenna mounted on the wireless device as well as a transceiver mounted on the wireless device.

[0071] Figure 4 (B) of FIG. 1 schematically illustrates another example of a communication network constituted by the wireless device 210, the wireless device 220, the wireless device 230, and the wireless device 240. Figure 4 The communication network illustrated in (B) of FIG. 1 is a communication network after the communication network illustrated in (A) of FIG. 1 is reconfigured by the control device 100 in order to avoid adverse effects of the rain cloud 50 on optical wireless communication. Figure 4 The communication network illustrated in (B) of FIG. 1 is a communication network after the communication network illustrated in (A) of FIG. 1 is reconfigured by the control device 100 in order to avoid adverse effects of the rain cloud 50 on optical wireless communication.

[0072] Figure 4 The communication network illustrated in (B) of FIG. 1 establishes optical wireless communication connections between the wireless device 210 and the wireless device 220, between the wireless device 220 and the wireless device 230, and between the wireless device 230 and the wireless device 240. Furthermore,Figure 4 The communication network illustrated in (B) establishes radio communication connections between wireless devices 210 and 220, between wireless devices 220 and 230, and between wireless devices 230 and 240.

[0073] Figure 4 (C) schematically illustrates another example of a communication network consisting of wireless devices 210, 220, 230 and 240. Figure 4 The communication network illustrated in (C) is reconfigured by control device 100 to avoid the adverse effects of rain cloud 50 on optical wireless communication. Figure 4 The communication network following the communication network illustrated in (A).

[0074] Figure 4 The communication network illustrated in (C) establishes optical wireless communication connections between wireless devices 210 and 220, between wireless devices 220 and 230, and between wireless devices 230 and 240. Furthermore, Figure 4 The communication network illustrated in (C) establishes a radio communication connection between wireless device 210 and wireless device 240.

[0075] according to Figure 4 In the system 10 of one embodiment shown, the control device 100 adds a radio wave communication path to the communication network when switching the connection destination of the optical wireless communication connection of one of the multiple wireless devices constituting the communication network. For example, like Figure 5 Similar to the communication network exemplified in (B), the control device 100 adds a radio wave communication path that is the same as the communication path of the optical wireless communication included in the communication network. The control device 100 may also add a radio wave communication path that is different from the communication path of the optical wireless communication included in the communication network. In particular, in frequency bands lower than the wavelength regions of radio wave communication and infrared light, compared to optical wireless communication, it is less susceptible to attenuation caused by water molecules. Therefore, even in severe weather conditions that negatively affect optical wireless communication but not radio wave communication, the control device 100 can also... Figure 5 As illustrated in (C), radio wave communication paths are added to areas where severe weather conditions prevent the use of optical wireless communication. Figure 5 The system 10 shown in one embodiment can further improve the operating efficiency of the communication network by combining optical wireless communication and radio wave communication.

[0076] Figure 5 This is an illustrative diagram illustrating another example of how the control device 100 switches the connection destination of the optical wireless communication connection of a wireless device. Assuming...Figure 5 The wireless device is wiredly connected to the repeater. Note that the repeater can have the same function as the wireless device. The repeater can be an example of the wireless device.

[0077] Figure 5 (A) of FIG. 10 schematically illustrates an example of the optical wireless communication connection between the wireless device 210 and the wireless device 230. The control device 100 determines whether to switch the optical wireless communication connection between the wireless device 210 and the wireless device 230, for example, based on the weather forecast data between the wireless device 210 and the wireless device 230. Here, it is assumed that the control device 100 determines to switch the optical wireless communication connection between the wireless device 210 and the wireless device 230 because the weather forecast data indicates that the rain cloud 50 adversely affects the optical wireless communication connection between the wireless device 210 and the wireless device 230, and the description will be continued.

[0078] The control device 100 selects the communication path from the wireless device 210 to the wireless device 230 in response to the determination to switch the optical wireless communication connection between the wireless device 210 and the wireless device 230. The control device 100 selects the communication path from the wireless device 210 to the wireless device 230, for example, based on the weather forecast data of the area including the predetermined range of the setting position of the wireless device 210 and the setting position of the wireless device 230. Here, it is assumed that the control device 100 selects the communication path via the repeater 215 wiredly connected to the wireless device 210 and the repeater 235 wiredly connected to the wireless device 230 as the communication path from the wireless device 210 to the wireless device 230, and the description will be continued.

[0079] The control device 100 controls the repeater 215 and the repeater 235, respectively, in response to the control device 100 selecting the communication path via the repeater 215 and the repeater 235 as the communication path from the wireless device 210 to the wireless device 230, to establish the optical wireless communication connection between the repeater 215 and the repeater 235. The control device 100 can control the repeater in the same manner as the case where the control device controls the wireless device to establish the optical wireless communication connection between the wireless devices.

[0080] Figure 5 (B) of FIG. 10 schematically illustrates another example of the communication path from the wireless device 210 to the wireless device 230. In Figure 6In (B) of FIG. 10, one example of a communication path connecting between the wireless device 210 and the wireless device 230 via the repeater 215 and the repeater 235 is illustrated, by way of a wired connection between the wireless device 210 and the repeater 215, an optical wireless communication connection between the repeater 215 and the repeater 235, and a wired connection between the repeater 235 and the wireless device 230. Thereby, it is possible to avoid adverse effects of the rain cloud 50 on communication between the wireless device 210 and the wireless device 230.

[0081] According to Figure 6 The system 10 according to the embodiment illustrated in FIG. 1 1 is configured to switch a communication path between the wireless devices via a repeater connected by a wired connection to the wireless devices, by the control device 100, to avoid adverse effects of adverse weather on communication between the wireless devices. Figure 6 The system 10 according to the embodiment illustrated in FIG. 1 1 is configured to further improve the operation rate of the communication network by combining optical wireless communication and wired communication.

[0082] Figure 6 (B) of FIG. 12 is a diagram for explaining another example in which the control device 100 causes the wireless devices to switch a connection destination of an optical wireless communication connection. Figure 6 (A) of FIG. 13 schematically illustrates another example of a communication network configured of the wireless device 210, the wireless device 220, the wireless device 230, and the wireless device 240. Figure 6 The communication network illustrated in (A) of FIG. 13 establishes optical wireless communication connections between the wireless device 210 and the wireless device 220, between the wireless device 220 and the wireless device 230, between the wireless device 230 and the wireless device 240, and between the wireless device 240 and the wireless device 210.

[0083] The control device 100 switches a communication path between the wireless devices via a repeater connected by a wired connection to the wireless devices, for example, on the basis of information including Figure 6Based on the weather forecast data of the area of ​​the communication network illustrated in (A), determine whether to switch the connection destination of the optical wireless communication connection of each of the wireless devices 210 to 240. Here, assuming that weather forecast data indicates that rain cloud 50 adversely affects the optical wireless communication connection between wireless device 210 and wireless device 220, and rain cloud 55 adversely affects the optical wireless communication connection between wireless device 230 and wireless device 240 and the optical wireless communication connection between wireless device 240 and wireless device 210, the control device 100 determines to switch the connection destination of the optical wireless communication connection of wireless device 210 from wireless device 220 and wireless device 240 to wireless device 230, switch the connection destination of the optical wireless communication connection of wireless device 220 from wireless device 210 and wireless device 230 to wireless device 230, switch the connection destination of the optical wireless communication connection of wireless device 230 from wireless device 220 and wireless device 240 to wireless device 210 and wireless device 220, and switch the connection destination of the optical wireless communication connection of wireless device 240 from wireless device 210 and wireless device 230 to no connection destination, the explanation will continue.

[0084] Figure 6 (B) schematically illustrates another example of a communication network consisting of wireless devices 210, 220, 230 and 240. Figure 7 The communication network illustrated in (B) is reconfigured by control device 100 to avoid the adverse effects of rain clouds 50 and 55 on optical wireless communication. Figure 8 The communication network following the communication network illustrated in (A).

[0085] As in Figure 8 As illustrated in (B), the control device 100 switches the connection destination of the optical wireless communication connection of the wireless device 210 from the wireless devices 220 and 240 to the wireless device 230 by enabling the wireless device 210 to establish an optical wireless communication connection between the wireless device 210 and the wireless device 230 using the transceiver 212 and transceiver 214 mounted on the wireless device 210. Figure 9 The system 10 of the embodiment shown can maximize the effective use of the wireless device's communication resources by enabling the wireless device to establish one optical wireless communication connection by using multiple transceivers for one optical wireless communication connection, where the wireless device can use multiple transceivers for one optical wireless communication connection.

[0086] Figure 10An example of a functional configuration of the control device 100 is schematically shown. The control device 100 is provided with an information holding section 102, a condition setting section 104, a weather forecast data acquisition section 106, a communication association information reception section 107, a communication association information prediction section 108, a wireless device control section 109, a switching determination section 110, a connection destination selection section 112, an establishment determination section 116, a learning data holding section 118, a model generation section 120, a model holding section 122, and a model acquisition section 124. Note that the control device 100 does not necessarily have to include all of these configurations.

[0087] The information holding section 102 holds various information. The information holding section 102, for example, holds setting position information indicating a setting position of a wireless device.

[0088] The information holding section 102, for example, holds performance information indicating a performance of a wireless device. The performance information, for example, includes MCS information indicating an MCS (Modulation and Channel Coding Scheme) of the wireless device. The performance information, for example, includes transceiver number information indicating a number of transceivers mounted on the wireless device. The number of transceivers is, for example, two. The number of transceivers can be one or more than three. The performance information, for example, includes transmitter maximum output power information indicating a maximum output power of a transmitter. The performance information, for example, includes antenna number information indicating a number of antennas mounted on the wireless device. The number of antennas is, for example, two. The number of antennas can be one or more than three. The performance information, for example, includes antenna maximum output power information indicating a maximum output power of an antenna. The performance information can also include repeater information indicating a repeater connected to the wireless device by wire.

[0089] The information holding section 102, for example, includes candidate communication path information indicating a candidate communication path of a communication network constituted by a plurality of wireless devices. The information holding section 102, for example, includes a plurality of pieces of candidate communication path information.

[0090] The condition setting section 104 sets various conditions. The condition setting section 104 can hold the set various conditions to the information holding section 102.

[0091] The condition setting section 104, for example, sets a switching determination condition that is a condition for determining whether to switch a connection destination of an optical wireless communication connection of one wireless device among a plurality of wireless devices. The switching determination condition, for example, includes that weather forecast data between the one wireless device and a wireless device among the plurality of wireless devices with which the one wireless device has established an optical wireless communication connection satisfies a severe weather condition.

[0092] The adverse weather condition for example includes that a predicted rainfall amount per unit time between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection is higher than a predetermined rainfall amount threshold in a prediction period of the weather prediction data. The adverse weather condition for example includes that a predicted snowfall amount per unit time between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection is higher than a predetermined snowfall amount threshold in the prediction period of the weather prediction data. The adverse weather condition for example includes that a cloud base height of a cloud generated between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection is lower than a predetermined cloud base height threshold in the prediction period of the weather prediction data.

[0093] The adverse weather condition for example includes that a predicted visibility between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection is shorter than a predetermined visibility threshold in the prediction period of the weather prediction data. The adverse weather condition for example includes that a predicted humidity between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection is higher than a predetermined humidity threshold in the prediction period of the weather prediction data. The adverse weather condition for example includes that a variation amount of a predicted air temperature between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection is larger than a predetermined air temperature variation amount threshold in the prediction period of the weather prediction data.

[0094] The adverse weather condition for example includes that a predicted air pressure between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection is lower than a predetermined air pressure threshold in the prediction period of the weather prediction data. The adverse weather condition for example includes that a predicted wind speed between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection is larger than a predetermined wind speed threshold in the prediction period of the weather prediction data. The adverse weather condition can also include that a turbulent flow is generated between the one wireless device and the wireless device with which the one wireless device has established the optical wireless communication connection in the prediction period of the weather prediction data.

[0095] The handover determination condition includes, for example, that the received signal strength of a signal received by the one wireless device from a wireless device that is a connection destination of the optical wireless communication connection of the one wireless device is lower than a predetermined first received signal strength threshold during a period in which the received signal strength is predicted. The handover determination condition includes, for example, that the delay of communication between the one wireless device and a wireless device that is a connection destination of the optical wireless communication connection of the one wireless device is longer than a predetermined first delay threshold during a period in which the delay is predicted. The handover determination condition includes, for example, that the jitter of communication between the one wireless device and a wireless device that is a connection destination of the optical wireless communication connection of the one wireless device is larger than a predetermined first jitter threshold during a period in which the jitter is predicted. The handover determination condition includes, for example, that the error rate of data received by the one wireless device from a wireless device that is a connection destination of the optical wireless communication connection of the one wireless device is higher than a predetermined first error rate threshold during a period in which the error rate is predicted. The handover determination condition can also include that the packet loss rate of a data packet transmitted by the one wireless device to a wireless device that is a connection destination of the optical wireless communication connection of the one wireless device is higher than a predetermined first packet loss rate threshold during a period in which the packet loss rate is predicted.

[0096] The condition setting unit 104 sets, for example, a first connection destination selection condition that is a condition for selecting a connection destination of the optical wireless communication connection of the one wireless device from among a plurality of wireless devices. The first connection destination selection condition includes, for example, that the weather prediction data between the one wireless device and a wireless device that is a connection destination of the optical wireless communication connection of the one wireless device among a plurality of wireless devices with which the wireless device can establish an optical wireless communication connection satisfies a first good weather condition.

[0097] The first good weather condition includes, for example, that the predicted rainfall per unit time between the one wireless device and a wireless device with which the one wireless device can establish an optical wireless communication connection is lower than a predetermined rainfall threshold during a period in which the weather prediction data is predicted. The first good weather condition includes, for example, that the predicted snowfall per unit time between the one wireless device and a wireless device with which the one wireless device can establish an optical wireless communication connection is lower than a predetermined snowfall threshold during a period in which the weather prediction data is predicted. The first good weather condition includes, for example, that the cloud base height of clouds generated between the one wireless device and a wireless device with which the one wireless device can establish an optical wireless communication connection is higher than a predetermined cloud base height threshold during a period in which the weather prediction data is predicted.

[0098] The first good weather condition includes, for example, that the predicted visibility between the one wireless device and the wireless device with which the one wireless device is able to establish an optical wireless communication connection is longer than a predetermined visibility threshold during the prediction period of the weather prediction data. The first good weather condition includes, for example, that the predicted humidity between the one wireless device and the wireless device with which the one wireless device is able to establish an optical wireless communication connection is lower than a predetermined humidity threshold during the prediction period of the weather prediction data. The first good weather condition includes, for example, that the amount of change in the predicted air temperature between the one wireless device and the wireless device with which the one wireless device is able to establish an optical wireless communication connection is smaller than a predetermined air temperature change amount threshold during the prediction period of the weather prediction data.

[0099] The first good weather condition includes, for example, that the predicted air pressure between the one wireless device and the wireless device with which the one wireless device is able to establish an optical wireless communication connection is higher than a predetermined air pressure threshold during the prediction period of the weather prediction data. The first good weather condition includes, for example, that the predicted wind speed between the one wireless device and the wireless device with which the one wireless device is able to establish an optical wireless communication connection is smaller than a predetermined wind speed threshold during the prediction period of the weather prediction data. The first good weather condition can also include that no turbulence occurs between the one wireless device and the wireless device with which the one wireless device is able to establish an optical wireless communication connection during the prediction period of the weather prediction data.

[0100] The first connection destination selection condition includes, for example, a condition for selecting a connection destination of the optical wireless communication connection of the one wireless device from among a plurality of wireless devices whose weather prediction data satisfy the first good weather condition in a case where there are a plurality of wireless devices whose weather prediction data satisfy the first good weather condition. The first connection destination selection condition includes, for example, selecting a wireless device whose operation rate is the highest among the plurality of wireless devices whose weather prediction data satisfy the first good weather condition as the connection destination of the optical wireless communication connection of the one wireless device. The first connection destination selection condition includes, for example, selecting a wireless device whose available bandwidth is the widest among the plurality of wireless devices whose weather prediction data satisfy the first good weather condition as the connection destination of the optical wireless communication connection of the one wireless device. The first connection destination selection condition includes, for example, selecting a wireless device whose operation rate is the lowest among the plurality of wireless devices whose weather prediction data satisfy the first good weather condition as the connection destination of the optical wireless communication connection of the one wireless device. The first connection destination selection condition includes, for example, selecting a wireless device whose operation rate is the highest among the plurality of wireless devices whose weather prediction data satisfy the first good weather condition as the connection destination of the optical wireless communication connection of the one wireless device. The first connection destination selection condition includes, for example, selecting a wireless device whose maximum output power of a transmitter mounted thereon is the highest among the plurality of wireless devices whose weather prediction data satisfy the first good weather condition as the connection destination of the optical wireless communication connection of the one wireless device.

[0101] The first connection destination selection condition includes, for example, a condition that gives priority to a wireless device, among the plurality of wireless devices, for which the weather forecast data satisfies the first good weather condition, in which the MCS is the same as the one wireless device, as the connection destination of the optical wireless communication connection of the one wireless device. The first connection destination selection condition includes, for example, a condition that gives priority to a wireless device, among the plurality of wireless devices, for which the weather forecast data satisfies the first good weather condition, in which the number of optical wireless communication connections established is less than the number of transceivers mounted, as the connection destination of the optical wireless communication connection of the one wireless device. The first connection destination selection condition can include a condition that gives priority to a relay device, among the plurality of wireless devices, for which the weather forecast data satisfies the first good weather condition, as the connection destination of the optical wireless communication connection of the one wireless device.

[0102] The condition setting unit 104 sets, for example, an establishment determination condition that is a condition for determining whether to cause the one wireless device, for which the connection destination of the optical wireless communication connection is switched among the plurality of wireless devices, to establish a radio wave communication connection with a wireless device that is capable of establishing a radio wave communication connection with the one wireless device. Note that the wireless device that is capable of establishing a radio wave communication connection with the one wireless device can be the same as or different from the wireless device that is capable of establishing an optical wireless communication connection with the one wireless device.

[0103] The establishment determination condition includes, for example, a condition that the bandwidth allocated to the communication between the one wireless device after the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device is narrower than a predetermined first bandwidth threshold. The establishment determination condition includes, for example, a condition that the bandwidth allocated to the communication between the one wireless device after the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device is narrower than a predetermined second bandwidth threshold compared to the bandwidth allocated to the communication between the one wireless device before the connection destination of the optical wireless communication connection is switched and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device.

[0104] The establishment determination condition includes, for example, a condition that the received signal strength of the signal received by the one wireless device after the connection destination of the optical wireless communication connection is switched from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device is lower than a predetermined second received signal strength threshold. The establishment determination condition includes, for example, a condition that the received signal strength of the signal received by the one wireless device after the connection destination of the optical wireless communication connection is switched from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device is lower than a predetermined third received signal strength threshold compared to the received signal strength of the signal received by the one wireless device before the connection destination of the optical wireless communication connection is switched from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device.

[0105] The establishment determination condition includes that a delay of communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is longer than a predetermined second delay threshold. The establishment determination condition includes that a delay of communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is longer than a predetermined third delay threshold compared to a delay of communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched.

[0106] The establishment determination condition includes that a jitter of communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is larger than a predetermined second jitter threshold. The establishment determination condition includes that a jitter of communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is larger than a predetermined third jitter threshold compared to a jitter of communication between the one wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched.

[0107] The establishment determination condition includes that an error rate of data received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined second error rate threshold. The establishment determination condition includes that an error rate of data received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined third error rate threshold compared to an error rate of data received by the one wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched.

[0108] The establishment determination condition includes that a packet loss rate of data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined second packet loss rate threshold. The establishment determination condition can include that the packet loss rate of data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device after the connection destination of the optical wireless communication connection is switched is higher than a predetermined third packet loss rate threshold compared to the packet loss rate of data packets transmitted by the one wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the one wireless device before the connection destination of the optical wireless communication connection is switched.

[0109] The condition setting unit 104 sets a second connection destination selection condition that is a condition for selecting the connection destination of the wireless communication connection of the one wireless device from among the plurality of wireless devices. The second connection destination selection condition includes, for example, that the weather forecast data between the one wireless device and the wireless device with which the one wireless device can establish a wireless communication connection among the plurality of wireless devices with which the one wireless device can establish a wireless communication connection as the connection destination of the wireless communication connection of the one wireless device satisfies a predetermined second good weather condition.

[0110] The second good weather condition can be a condition of the same kind as the first good weather condition related to various data included in the weather forecast data. The second good weather condition is, for example, the same condition as the first good weather condition. The second good weather condition can be a different condition from the first good weather condition. The second good weather condition is, for example, a more lenient condition than the first good weather condition.

[0111] The second connection destination selection condition can include a condition for selecting the connection destination of the wireless communication connection of the one wireless device from among the plurality of wireless devices for which the weather forecast data satisfies the second good weather condition in a case where the plurality of wireless devices for which the weather forecast data satisfies the second good weather condition exist. The second connection destination selection condition can include a condition that is the same as the condition for selecting the connection destination of the optical wireless communication connection of the one wireless device from among the plurality of wireless devices for which the weather forecast data satisfies the first good weather condition in a case where the plurality of wireless devices for which the weather forecast data satisfies the first good weather condition exist.

[0112] The weather forecast data acquisition section 106 acquires weather forecast data of a region including a predetermined range of a setting position of a wireless device indicated by the setting position information of the wireless device stored in the information storage section 102. The weather forecast data acquisition section 106, for example, acquires, for each of a plurality of wireless devices, weather forecast data that predicts weather between a wireless device of the plurality of wireless devices and a wireless device of the plurality of wireless devices with which the wireless device is able to establish an optical wireless communication connection. The weather forecast data acquisition section 106 can store the acquired weather forecast data in the information storage section 102.

[0113] The weather forecast data acquisition section 106, for example, receives weather data, predicts weather based on the received weather data, and thereby acquires weather forecast data. The weather forecast data acquisition section 106, for example, receives weather data from the weather data server 500. The weather forecast data acquisition section 106 can also receive weather data from a weather observation device mounted on a wireless device or a weather observation device disposed around a wireless device. The weather observation device, for example, includes a precipitation gauge. The weather observation device, for example, includes a snowfall gauge. The weather observation device, for example, includes a cloud base height gauge. The weather observation device, for example, includes a visibility meter. The weather observation device, for example, includes a hygrometer. The weather observation device, for example, includes a thermometer. The weather observation device, for example, includes a barometer. The weather observation device, for example, includes a wind speed and direction meter. The weather observation device, for example, includes a turbulence measuring device. The weather observation device can also include an optical camera. The weather forecast data acquisition section 106 can also acquire weather forecast data by receiving weather forecast data from the weather data server 500.

[0114] The communication association information reception section 107 receives communication association information of a wireless device. The communication association information reception section 107, for example, receives communication association information from each of a plurality of wireless devices. The communication association information reception section 107 can store the received communication association information in the information storage section 102.

[0115] The communication association information reception section 107, for example, receives communication association information of a wireless device before a connection destination of an optical wireless communication connection of the wireless device is switched. The communication association information reception section 107, for example, receives communication association information of the wireless device after the connection destination of the optical wireless communication connection of the wireless device is switched.

[0116] The communication association information prediction section 108 predicts communication association information of a wireless device. The communication association information prediction section 108, for example, predicts communication association information of each of a plurality of wireless devices. The communication association information prediction section 108 can store the predicted communication association information of the wireless device in the information storage section 102.

[0117] The communication association information prediction unit 108, for example, predicts the communication association information of one of a plurality of wireless devices before the plurality of wireless devices construct a communication network. The communication association information prediction unit 108, for example, predicts the communication association information of the one wireless device after the plurality of wireless devices construct a communication network.

[0118] The communication association information prediction unit 108, for example, predicts the communication association information of one of a plurality of wireless devices before the plurality of wireless devices construct a communication network. The communication association information prediction unit 108, for example, predicts the communication association information of the one wireless device after the plurality of wireless devices construct a communication network.

[0119] The communication association information prediction unit 108, for example, predicts the communication association information of one of a plurality of wireless devices before the plurality of wireless devices construct a communication network. The communication association information prediction unit 108, for example, predicts the communication association information of the one wireless device after the plurality of wireless devices construct a communication network.

[0120] The communication association information prediction section 108 can also predict the communication association information of the one wireless device based on the communication association information of the one wireless device received by the communication association information reception section 107. The communication association information prediction section 108, for example, predicts the reception signal strength of the one wireless device based on the reception signal strength of the one wireless device indicated by the reception signal strength information included in the communication association information of the one wireless device. The communication association information prediction section 108, for example, predicts the delay of the one wireless device based on the delay of the one wireless device indicated by the delay information included in the communication association information of the one wireless device. The communication association information prediction section 108, for example, predicts the jitter of the one wireless device based on the jitter of the one wireless device indicated by the jitter information included in the communication association information of the one wireless device. The communication association information prediction section 108, for example, predicts the error rate of the one wireless device based on the error rate of the one wireless device indicated by the error rate information included in the communication association information of the one wireless device. The communication association information prediction section 108 can also predict the packet loss rate of the one wireless device based on the packet loss rate of the one wireless device indicated by the packet loss rate information included in the communication association information of the one wireless device.

[0121] The wireless device control section 109 controls the plurality of wireless devices respectively. The wireless device control section 109, for example, controls the plurality of wireless devices respectively by transmitting control signals to the plurality of wireless devices respectively via the network 20.

[0122] The control signal, for example, includes a transceiver direction control signal that controls the orientation of a transceiver mounted on the wireless device. The transceiver direction control signal, for example, includes an emission direction control signal that controls the emission direction of an optical signal emitted by a laser. The transceiver direction control signal can also include a light-receiving surface direction control signal that controls the direction of a light-receiving surface of a photodetector. The control signal includes an antenna direction control signal that controls the orientation of an antenna mounted on the wireless device. The antenna direction control signal, for example, includes an emission direction control signal that controls the emission direction of an electric wave signal emitted by the antenna. The antenna direction control signal can also include a power-receiving surface direction control signal that controls the direction of a power-receiving surface of the antenna.

[0123] The wireless device control section 109, for example, controls each of the plurality of wireless devices to construct a communication network constituted by the plurality of wireless devices. The wireless device control section 109, for example, controls each of the plurality of wireless devices to construct a communication network that uses one of the plurality of candidate communication paths indicated by the plurality of candidate communication path information held in the information holding section 102 as a communication path.

[0124] The wireless device control section 109 selects the one candidate communication path from among the plurality of candidate communication paths, for example, based on the weather forecast data acquired by the weather forecast data acquisition section 106. The wireless device control section 109 counts, for example, the number of weather in which the severe weather condition stored in the information storage section 102 is satisfied among the weather between the two wireless devices that establish the optical wireless communication connection, for each of the plurality of candidate communication paths, based on the weather forecast data, and selects the candidate communication path in which the counted number is the smallest as the one candidate communication path.

[0125] The switch determination section 110 determines whether to switch the connection destination of the optical wireless communication connection of one wireless device among the plurality of wireless devices. The switch determination section 110 determines whether to switch the connection destination of the optical wireless communication connection of the one wireless device, for example, based on the weather forecast data between the one wireless device and the wireless device among the plurality of wireless devices with which the one wireless device establishes the optical wireless communication connection, which is acquired by the weather forecast data acquisition section 106. The switch determination section 110 determines to switch the connection destination of the optical wireless communication connection of the one wireless device, for example, in a case where the weather forecast data satisfies the switch determination condition stored in the information storage section 102.

[0126] The switch determination section 110 determines whether to switch the connection destination of the optical wireless communication connection of the one wireless device, for example, based on the communication association information of the one wireless device received by the communication association information reception section 107. The switch determination section 110 determines to switch the connection destination of the optical wireless communication connection of the one wireless device, for example, in a case where the communication association information of the one wireless device satisfies the switch determination condition.

[0127] The switch determination section 110 can also determine whether to switch the connection destination of the optical wireless communication connection of the one wireless device, based on the communication association information of the one wireless device predicted by the communication association information prediction section 108. The switch determination section 110 determines to switch the connection destination of the optical wireless communication connection of the one wireless device, for example, in a case where the communication association information of the one wireless device satisfies the switch determination condition.

[0128] The connection-destination selection section 112 selects the connection destination of the optical wireless communication connection of the one wireless device and the connection destination of the optical wireless communication connection of the other wireless device that needs to switch the connection destination of the optical wireless communication connection among the plurality of wireless devices in response to the switch-determination section 110 determining to switch the connection destination of the optical wireless communication connection of the one wireless device. The connection-destination selection section 112 selects the connection destination of the optical wireless communication connection of the one wireless device and the connection destination of the optical wireless communication connection of the other wireless device, for example, on the basis of the weather forecast data of the respective plurality of wireless devices acquired by the weather forecast data acquisition section 106. The connection-destination selection section 112 selects the connection destination of the optical wireless communication connection of the one wireless device and the connection destination of the optical wireless communication connection of the other wireless device, for example, on the basis of the communication association information of the respective plurality of wireless devices received by the communication association information reception section 107. The connection-destination selection section 112 selects the connection destination of the optical wireless communication connection of the one wireless device and the connection destination of the optical wireless communication connection of the other wireless device, for example, on the basis of the communication association information of the respective plurality of wireless devices predicted by the communication association information prediction section 108. The connection-destination selection section 112 can also select the connection destination of the optical wireless communication connection of the one wireless device and the connection destination of the optical wireless communication connection of the other wireless device on the basis of the performance information of the respective plurality of wireless devices held in the information holding section 102.

[0129] The connection-destination selection section 112 selects the connection destination of the optical wireless communication connection of the one wireless device, for example, in a manner that the connection destination of the optical wireless communication connection of the one wireless device satisfies the first connection-destination selection condition held in the information holding section 102. The connection-destination selection section 112 selects the connection destination of the optical wireless communication connection of the other wireless device, for example, in a manner that the connection destination of the optical wireless communication connection of the other wireless device satisfies the first connection-destination selection condition held in the information holding section 102.

[0130] The wireless device control section 109 can cause the plurality of wireless devices to switch the connection destination of the optical wireless communication connection on the basis of the selection result of the connection-destination selection section 112. The wireless device control section 109 causes the one wireless device to establish the optical wireless communication connection between the one wireless device and the wireless device selected as the connection destination of the optical wireless communication connection of the one wireless device using the plurality of transceivers in a case where the one wireless device mounting the plurality of transceivers is able to use the plurality of transceivers for communication with the wireless device selected as the connection destination of the optical wireless communication connection of the one wireless device by the connection-destination selection section 112, thereby causing the one wireless device to switch the connection destination of the optical wireless communication connection.

[0131] The wireless device control section 109 can cause the one wireless device that switches the connection destination of the optical wireless communication connection to establish a radio wave communication connection between the one wireless device and a wireless device among the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection, in response to the switching determination section 110 determining to switch the connection destination of the optical wireless communication connection of the one wireless device. The wireless device control section 109 can cause another wireless device among the plurality of wireless devices to establish a radio wave communication connection between the other wireless device and a wireless device among the plurality of wireless devices with which the other wireless device is able to establish a radio wave communication connection, in response to the switching determination section 110 determining to switch the connection destination of the optical wireless communication connection of the one wireless device.

[0132] The connection destination selection section 112 selects the connection destination of the radio wave communication connection of the one wireless device, for example, from among the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection. The connection destination selection section 112 selects the connection destination of the radio wave communication connection of the one wireless device, for example, based on the weather prediction data acquired by the weather prediction data acquisition section 106 between the one wireless device and each of the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection. The connection destination selection section 112 selects the connection destination of the radio wave communication connection of the one wireless device, for example, based on the communication association information received by the communication association information reception section 107 of each of the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection. The connection destination selection section 112 selects the connection destination of the radio wave communication connection of the one wireless device, for example, based on the communication association information predicted by the communication association information prediction section 108 of each of the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection. The connection destination selection section 112 can also select the connection destination of the radio wave communication connection of the one wireless device based on the performance information of each of the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection, which is held in the information holding section 102. The connection destination selection section 112 selects the connection destination of the radio wave communication connection of the one wireless device, for example, in a manner in which the connection destination of the radio wave communication connection of the one wireless device satisfies the second connection destination selection condition held in the information holding section 102.

[0133] The connection destination selection section 112 can also select the connection destination of the radio wave communication connection of the other wireless device from among the plurality of wireless devices with which the other wireless device is able to establish a radio wave communication connection. The connection destination selection section 112 can select the connection destination of the radio wave communication connection of the other wireless device from among the plurality of wireless devices with which the other wireless device is able to establish a radio wave communication connection in the same manner as when selecting the connection destination of the radio wave communication connection of the one wireless device from among the plurality of wireless devices with which the one wireless device is able to establish a radio wave communication connection.

[0134] The wireless device control section 109 can cause the one wireless device to establish a wave communication connection between the one wireless device and a wireless device that is selected by the connection destination selection section 112 as a connection destination of the wave communication connection for the one wireless device. The wireless device control section 109 can also cause the other wireless device to establish a wave communication connection between the other wireless device and a wireless device that is selected by the connection destination selection section 112 as a connection destination of the wave communication connection for the other wireless device.

[0135] The establishment determination section 116 determines whether to cause one wireless device of the plurality of wireless devices to establish a wave communication connection. The establishment determination section 116, for example, determines whether to cause the one wireless device to establish a wave communication connection in response to the switch determination section 110 determining to switch the connection destination of the optical wireless communication connection of the one wireless device. The wireless device control section 109 can cause the one wireless device to establish a wave communication connection between the one wireless device and a wireless device that the one wireless device is able to establish a wave communication connection with, in response to the establishment determination section 116 determining to cause the one wireless device to establish a wave communication connection.

[0136] The establishment determination section 116 determines whether to cause the one wireless device to establish a wave communication connection, for example, based on the communication association information of the one wireless device after the connection destination of the optical wireless communication connection is switched, which is received by the communication association information reception section 107. The establishment determination section 116 can also determine whether to cause the one wireless device to establish a wave communication connection based on the communication association information of the one wireless device before the connection destination of the optical wireless communication connection is switched, which is received by the communication association information reception section 107. The establishment determination section 116 determines to cause the one wireless device to establish a wave communication connection, for example, in a case where the communication association information of the one wireless device after the connection destination of the optical wireless communication connection is switched satisfies the establishment determination condition that is held in the information holding section 102.

[0137] The establishment determination section 116 determines whether to cause the one wireless device to establish a wave communication connection, for example, based on the communication association information of the one wireless device after the connection destination of the optical wireless communication connection is switched, which is predicted by the communication association information prediction section 108. The establishment determination section 116 can also determine whether to cause the one wireless device to establish a wave communication connection based on the communication association information of the one wireless device before the connection destination of the optical wireless communication connection is switched, which is predicted by the communication association information prediction section 108. The establishment determination section 116 determines to cause the one wireless device to establish a wave communication connection, for example, in a case where the communication association information of the one wireless device after the connection destination of the optical wireless communication connection is switched satisfies the establishment determination condition.

[0138] In a case where the connection destination of the optical wireless communication connection of one of the plurality of wireless devices is switched, the control device 100 does not cause the one wireless device to establish the radio wave communication connection in a case where the communication quality of the one wireless device after the switch is not reduced, and causes the one wireless device to establish the radio wave communication connection in a case where the communication quality of the one wireless device after the switch is reduced. Thus, the control device 100 can maintain the communication quality of the communication network even when the connection destination of the wireless device is switched, while reducing the power consumption of the entire system.

[0139] The learning data storage 118 stores learning data. The learning data, for example, includes the weather forecast data acquired by the weather forecast data acquisition unit 106, the weather forecast data between one of the plurality of wireless devices and the wireless device with which the one wireless device establishes the optical wireless communication connection, and the reception signal strength information received by the communication association information reception unit 107, which indicates the reception signal strength of the signal received by the one wireless device from the wireless device with which the one wireless device establishes the optical wireless communication connection during the prediction period of the weather forecast data.

[0140] The model generation unit 120 generates an inference model that infers the reception signal strength of the signal received by one of the plurality of wireless devices, by machine learning. The model generation unit 120, for example, uses the plurality of learning data stored in the learning data storage 118 as training data, and generates an inference model that infers the reception signal strength of the signal received by the one wireless device from the wireless device with which the one wireless device establishes the optical wireless communication connection during the prediction period of the weather forecast data, based on the weather forecast data between the one wireless device and the wireless device with which the one wireless device establishes the optical wireless communication connection, by machine learning. The model generation unit 120 can store the generated inference model in the model storage 122.

[0141] The model acquisition unit 124 acquires an inference model that infers the reception signal strength of the signal received by one of the plurality of wireless devices. The model acquisition unit 124, for example, acquires the same inference model as the inference model generated by the model generation unit 120. The model acquisition unit 124 can store the acquired inference model in the model storage 122.

[0142] The switching determination unit 110 can also determine whether to switch the connection destination of the optical wireless communication connection of one of the plurality of wireless devices using the inference model held in the model holding unit 122. The weather prediction data acquisition unit 106, for example, infers the received signal strength of the signal received by the one wireless device from the wireless device with which the one wireless device has established an optical wireless communication connection, during the prediction period of the weather prediction data acquired by the weather prediction data acquisition unit 106, using the inference model, and determines that the connection destination of the optical wireless communication connection of the one wireless device is to be switched in a case where the inferred received signal strength is lower than the first received signal strength threshold.

[0143] Figure 11 is a diagram for explaining one example of the process flow of the control device 100. Here, the state in which the communication network composed of the plurality of wireless devices has been constructed is explained as the start state. ​ In the illustrated graph, the horizontal axis is the time, and the vertical axis is the received signal strength (dBm).

[0144] The switching determination unit 110 determines whether to switch the connection destination of the optical wireless communication connection of one of the plurality of wireless devices based on the received signal strength of the signal received by the one wireless device from the wireless device with which the one wireless device has established an optical wireless communication connection, which is predicted by the communication association information prediction unit 108. Here, the explanation will be continued on the assumption that the communication association information prediction unit 108 predicts the received signal strength of the one wireless device at the period during the predetermined prediction period from the time t=t0 based on the weather prediction data acquired by the weather prediction data acquisition unit 106 between the one wireless device and the wireless device with which the one wireless device has established an optical wireless communication connection.

[0145] For example, in a case where the communication association information prediction unit 108 predicts the received signal strength of the one wireless device to be in the prediction pattern 1, the switching determination unit 110 determines that the connection destination of the optical wireless communication connection of the one wireless device is not to be switched because the received signal strength of the one wireless device during the prediction period is higher than the received signal strength threshold. For example, in a case where the communication association information prediction unit 108 predicts the received signal strength of the one wireless device to be in the prediction pattern 2, the switching determination unit 110 determines that the connection destination of the optical wireless communication connection of the one wireless device is to be switched because the received signal strength of the one wireless device during the prediction period is lower than the received signal strength threshold.

[0146] ​ is a diagram for explaining one example of the process flow of the control device 100. Here, the state in which the communication network composed of the plurality of wireless devices has been constructed is explained as the start state.

[0147] In step (sometimes, the step is omitted and described as S.) 102, the control device 100 acquires various information of each of the plurality of wireless devices. For example, the weather forecast data acquisition section 106 acquires weather forecast data that predicts weather of a wireless device among the plurality of wireless devices and a wireless device with which the wireless device is able to establish an optical wireless communication connection. For example, the communication association information prediction section 108 predicts a received signal strength of a signal received by the wireless device from the wireless device with which the wireless device has established an optical wireless communication connection, based on the weather forecast data acquired by the weather forecast data acquisition section 106.

[0148] In S104, the handover determination section 110 determines whether the received signal strength of the wireless device is lower than the received signal strength threshold value held in the information holding section 102 during a prediction period in which the communication association information prediction section 108 predicts the received signal strength of the wireless device in S102. In a case where the handover determination section 110 determines that the received signal strength of the wireless device is lower than the received signal strength threshold value during the prediction period, S106 is entered. In a case where the handover determination section 110 determines that the received signal strength of the wireless device is higher than the received signal strength threshold value during the prediction period, S118 is entered.

[0149] In S106, the connection destination selection section 112 determines whether there is a wireless device with which the wireless device is able to establish an optical wireless communication connection, which satisfies a good weather condition held in the information holding section 102, among the wireless devices with which the wireless device is able to establish an optical wireless communication connection, which is acquired by the weather forecast data acquisition section 106 in S102. In a case where the connection destination selection section 112 determines that there is a wireless device with which the wireless device is able to establish an optical wireless communication connection, which satisfies the good weather condition, S108 is entered. In a case where the connection destination selection section 112 determines that there is no wireless device with which the wireless device is able to establish an optical wireless communication connection, which satisfies the good weather condition, S112 is entered.

[0150] In S108, the connection destination selection section 112 selects a connection destination of the optical wireless communication connection of the wireless device from among the wireless devices with which the wireless device is able to establish an optical wireless communication connection, which satisfies the good weather condition, determined in S106. The connection destination selection section 112 selects a connection destination of the optical wireless communication connection of the other wireless device, which needs to switch a connection destination of an optical wireless communication connection, among the plurality of wireless devices, in response to the selection of the connection destination of the optical wireless communication connection of the wireless device. In S110, the wireless device control section 109 causes the plurality of wireless devices to switch the connection destination of the optical wireless communication connection, based on the selection result of the selection made by the connection destination selection section 112 in S108.

[0151] In S112, the connection-destination selection section 112 selects, among the wireless devices with which the one wireless device can establish the optical wireless communication connection, the wireless device for which the weather forecast data acquired by the weather forecast data acquisition section 106 in S102 is the best. In S114, the switch determination section 110 determines whether to switch the connection destination of the optical wireless communication connection of the one wireless device, based on the selection result of the selection made by the connection-destination selection section 112 in S112. For example, in a case where the connection-destination selection section 112 selects, in S112, the wireless device with which the one wireless device does not establish the optical wireless communication connection, the switch determination section 110 determines to switch the connection destination of the optical wireless communication connection of the one wireless device. For example, in a case where the connection-destination selection section 112 selects, in S112, the wireless device with which the one wireless device establishes the optical wireless communication connection, the switch determination section 110 determines not to switch the connection destination of the optical wireless communication connection of the one wireless device. In a case where the switch determination section 110 determines to switch the connection destination of the optical wireless communication connection of the one wireless device, the processing proceeds to S116. In this case, the connection-destination selection section 112 selects, in response to the switching of the connection destination of the optical wireless communication connection of the one wireless device, the connection destination of the optical wireless communication connection of the other wireless device among the plurality of wireless devices for which the connection destination of the optical wireless communication connection needs to be switched. In a case where the switch determination section 110 determines not to switch the connection destination of the optical wireless communication connection of the one wireless device, the processing proceeds to S118.

[0152] In S116, the wireless device control section 109 causes the plurality of wireless devices to switch the connection destination of the optical wireless communication connection, based on the selection result of the selection made by the connection-destination selection section 112 in S112 and S114. In S118, the wireless device control section 109 causes the plurality of wireless devices to maintain the connection destination of the optical wireless communication connection.

[0153] In S120, the control device 100 determines whether the end instruction is acquired. In a case where the control device 100 determines that the end instruction is not acquired, the processing returns to S102. In a case where the control device 100 determines that the end instruction is acquired, the processing of the control device 100 ends.

[0154] ​ is a diagram for explaining another example of the processing flow of the control device 100. Here, the state in which the communication network composed of the plurality of wireless devices is constructed is explained as the start state.

[0155] In S202, the control device 100 acquires various information. For example, the weather forecast data acquisition section 106 acquires weather forecast data that forecasts weather of an area including the installation locations of the plurality of wireless devices. For example, the communication association information reception section 107 receives the operation rate information of the wireless devices from the plurality of wireless devices respectively. For example, the communication association information reception section 107 receives the available bandwidth information of the plurality of wireless devices from the plurality of wireless devices respectively.

[0156] For example, the communication association information prediction section 108 predicts the communication quality of the communication path of the communication network. The communication association information prediction section 108 predicts the average operation rate of the communication path, for example, based on the operation rates of the plurality of wireless devices respectively indicated by the operation rate information of the plurality of wireless devices respectively received by the communication association information reception section 107, and thereby predicts the communication quality of the communication path. The communication association information prediction section 108 can also predict the average available bandwidth of the communication path based on the available bandwidths of the plurality of wireless devices respectively indicated by the available bandwidth information of the plurality of wireless devices respectively received by the communication association information reception section 107, and thereby predicts the communication quality of the communication path.

[0157] In S204, the switching determination section 110 determines whether the communication path is affected by the adverse weather based on the weather forecast data acquired by the weather forecast data acquisition section 106 in S202. For example, in a case where there are two wireless devices that have established the optical wireless communication connection and the weather between the wireless devices satisfies the adverse weather condition saved in the information saving section 102 among the plurality of wireless devices, the switching determination section 110 determines that the communication path is affected by the adverse weather. In a case where the switching determination section 110 determines that the communication path is affected by the adverse weather, S206 is entered. In a case where the switching determination section 110 determines that the communication path is not affected by the adverse weather, S216 is entered.

[0158] In S206, the communication association information prediction section 108 predicts the communication quality of the candidate communication path indicated by the candidate communication path information saved in the information saving section 102. The communication association information prediction section 108 predicts the average operation rate of the candidate communication path when the communication path is switched to the candidate communication path, for example, based on the operation rates of the plurality of wireless devices respectively indicated by the operation rate information of the plurality of wireless devices respectively received by the communication association information reception section 107 in S202, and thereby predicts the communication quality of the candidate communication path. The communication association information prediction section 108 can also predict the average available bandwidth of the candidate communication path when switched to the candidate communication path based on the available bandwidths of the plurality of wireless devices respectively indicated by the available bandwidth information of the plurality of wireless devices respectively received by the communication association information reception section 107 in S202, and thereby predicts the communication quality of the candidate communication path.

[0159] In S208, the switching determination section 110 determines whether there is a candidate communication path in which the communication quality improves when the communication path is switched to the candidate communication path. For example, in a case where the communication quality of the candidate communication path predicted by the communication association information prediction section 108 in S206 is higher than the communication quality of the communication path predicted by the communication association information prediction section 108 in S202, the switching determination section 110 determines that there is a candidate communication path in which the communication quality improves. In a case where the switching determination section 110 determines that there is a candidate communication path in which the communication quality improves, the process proceeds to S210. In a case where the switching determination section 110 determines that there is no candidate communication path in which the communication quality improves, the process proceeds to S216.

[0160] In S210, the connection destination selection section 112 determines whether to prioritize the operating rate of the wireless devices to select the communication path from the candidate communication paths in which the communication quality improves, which are determined by the switching determination section 110 in S208. In a case where it is determined to prioritize the operating rate of the wireless devices to select the communication path, the process proceeds to S212. In a case where it is determined not to prioritize the operating rate of the wireless devices to select the communication path, the process proceeds to S214.

[0161] In S212, the connection destination selection section 112 selects, as the communication path, the candidate communication path in which the average operating rate is the highest among the candidate communication paths in which the communication quality improves, which are determined by the switching determination section 110 in S208. The wireless device control section 109 causes the plurality of wireless devices to switch the communication path to the candidate communication path in which the average operating rate is the highest.

[0162] In S214, the connection destination selection section 112 selects, as the communication path, the candidate communication path in which the average available bandwidth is the widest among the candidate communication paths in which the communication quality improves, which are determined by the switching determination section 110 in S208. The wireless device control section 109 causes the plurality of wireless devices to switch the communication path to the candidate communication path in which the average available bandwidth is the widest.

[0163] In S216, the wireless device control section 109 causes the plurality of wireless devices to maintain the communication path. In S218, the control apparatus 100 determines whether the end instruction is acquired. In a case where the control apparatus 100 determines that the end instruction is not acquired, the process returns to S202. In a case where the control apparatus 100 determines that the end instruction is acquired, the process of the control apparatus 100 ends.

[0164] ​An example of a hardware configuration of a computer 1200 functioning as the control device 100 is shown schematically. A program installed in the computer 1200 can cause the computer 1200 to function as one or more "parts" of the device related to the embodiments described above, or can cause the computer 1200 to perform operations associated with the device or the one or more "parts" related to the embodiments described above, and / or can cause the computer 1200 to perform the processing or the stages of the processing related to the embodiments described above. Such a program can be executed by the CPU 1212 to cause the computer 1200 to perform certain operations associated with some or all of the blocks of the flowcharts and block diagrams described in this specification.

[0165] The computer 1200 according to the present embodiment includes the CPU 1212, the RAM 1214, and the graphics controller 1216, which are connected to each other through the host controller 1210. The computer 1200 further includes the communication interface 1222, the storage device 1224, the DVD drive 1226, and the IC card drive as input and output units, which are connected to the host controller 1210 via the input and output controller 1220. The DVD drive 1226 can be a DVD-ROM drive, a DVD-RAM drive, or the like. The storage device 1224 can be a hard disk drive, a solid state drive, or the like. The computer 1200 further includes the ROM 1230 and the keyboard 1242 as conventional input and output units, which are connected to the input and output controller 1220 via the input and output chip 1240.

[0166] The CPU 1212 acts in accordance with a program stored in the ROM 1230 and the RAM 1214, thereby controlling the units. The graphics controller 1216 acquires image data generated by the CPU 1212 in a frame buffer or the like provided in the RAM 1214 or in itself, and causes the image data to be displayed on the display device 1218.

[0167] The communication interface 1222 communicates with other electronic devices via a network. The storage device 1224 stores programs and data used by the CPU 1212 in the computer 1200. The DVD drive 1226 reads programs or data from a DVD-ROM 1227 or the like, and provides them to the storage device 1224. The IC card drive reads programs and data from an IC card, and / or writes programs and data to the IC card.

[0168] The ROM 1230 stores a boot program or the like executed by the computer 1200 at the time of activation, and / or a program dependent on the hardware of the computer 1200. The input and output chip 1240 can also connect various input and output units to the input and output controller 1220 via a USB port, a parallel port, a serial port, a keyboard port, a mouse port, or the like.

[0169] The program is provided through a computer-readable storage medium such as the DVD-ROM 1227 or an IC card. The program is read from the computer-readable storage medium, installed in the storage device 1224, the RAM 1214, or the ROM 1230, which are examples of the computer-readable storage medium, and executed by the CPU 1212. The information processing described in these programs is read by the computer 1200, bringing about cooperation between the program and the various types of hardware resources described above. An apparatus or a method can be constituted by implementing the operation or processing of information according to the use of the computer 1200.

[0170] For example, when communication is performed between the computer 1200 and an external device, the CPU 1212 can execute a communication program loaded into the RAM 1214 and issue an instruction of communication processing to the communication interface 1222 according to the processing described in the communication program. The communication interface 1222 reads transmission data stored in a transmission buffer area provided in the RAM 1214, the storage device 1224, a recording medium such as the DVD-ROM 1227 or an IC card, under the control of the CPU 1212, and transmits the read transmission data to a network or writes reception data received from a network into a reception buffer area provided on a recording medium, and the like.

[0171] Further, the CPU 1212 can read all or a necessary part of a file or a database stored in the storage device 1224, the DVD drive 1226 (the DVD-ROM 1227), an external recording medium such as an IC card, to the RAM 1214, and perform various types of processing on the data on the RAM 1214. The CPU 1212 can then write the processed data back to the external recording medium.

[0172] Various types of programs, data, tables, and various types of information such as databases can be saved in a recording medium and subjected to information processing. The CPU 1212 can perform various types of processing on data read from the RAM 1214, including various types of operations, information processing, condition judgments, condition branching, unconditional branching, search / replacement of information, and the like described throughout the present disclosure and specified by an instruction sequence of a program, and write the results back to the RAM 1214. Further, the CPU 1212 can search for information in a file, a database, or the like in a recording medium. For example, in a case where a plurality of entries each having a first attribute value associated with a second attribute value of a second attribute are saved in a recording medium, the CPU 1212 can search for an entry that matches a condition in which a first attribute value of the first attribute is specified from the plurality of entries, read the second attribute value saved in the entry, and thereby acquire the second attribute value of the second attribute associated with the first attribute that satisfies a condition prescribed in advance.

[0173] The programs or software modules described above can be stored in a computer-readable storage medium on or near the computer 1200. Furthermore, a recording medium such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet can be used as the computer-readable storage medium, whereby the programs are provided to the computer 1200 via the network.

[0174] The blocks in the flowcharts and block diagrams in the present embodiment can represent stages of processing that perform operations or "parts" of apparatuses that have roles of performing operations. The specific stages and "parts" can be installed by dedicated circuits, programmable circuits supplied in conjunction with computer-readable instructions stored on a computer-readable storage medium, and / or processors supplied in conjunction with computer-readable instructions stored on a computer-readable storage medium. The dedicated circuits can include digital and / or analog hardware circuits, and can include integrated circuits (ICs) and / or discrete circuits. The programmable circuits can include, for example, reconfigurable hardware circuits such as field programmable gate arrays (FPGAs) and programmable logic arrays (PLAs), which include logical and, logical or, logical exclusive or, logical and not, logical or not, and other logical operations, flip-flops, registers, and memory elements.

[0175] The computer-readable storage medium can include any tangible device that can store instructions for execution by an appropriate device, and as a result, the computer-readable storage medium having instructions stored therein is a product including a product that can execute to create a unit for performing the operations specified in the flowcharts or block diagrams. As examples of the computer-readable storage medium, electronic storage media, magnetic storage media, optical storage media, electromagnetic storage media, semiconductor storage media, and the like can be included. As more specific examples of the computer-readable storage medium, floppy disks (registered trademark), magnetic disks, hard disks, random access memories (RAMs), read-only memories (ROMs), erasable programmable read-only memories (EPROMs or flash memories), electrically erasable programmable read-only memories (EEPROMs), static random access memories (SRAMs), compact discs read-only memories (CD-ROMs), digital versatile discs (DVDs), Blu-ray (registered trademark) discs, memory sticks, integrated circuits (ICs), and the like can be included.

[0176] The computer-readable instructions can include any one of assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state-setting data, or source code or object code described in any combination of one or more programming languages, including an object-oriented programming language such as Smalltalk (registered trademark), JAVA (registered trademark), C++, and the like, and a conventional procedural programming language such as "C" programming language or the like.

[0177] The computer readable instructions can be provided to a processor or programmable circuitry of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor or other programmable circuitry, implement the functions of the flowchart or block diagram block or blocks. As used in this disclosure, the term "processor" encompasses an electronic processor, processing unit, microprocessor, digital signal processor, controller, microcontroller, or the like.

[0178] The above-described embodiments are merely illustrative for the present application and the technical scope of the present application is not limited to the scope of the above-described embodiments. Various changes or modifications can be made to the above-described embodiments by those skilled in the art. Such changes or modifications are also included in the technical scope of the present application. It is apparent that the technical scope of the present application can be expressed by the matter described in the claims, the matter equivalent thereto, and the matter that is a combination of the matter described in the claims and the matter equivalent thereto.

[0179] The order of execution of the processes of the devices, systems, programs, and methods shown in the claims, the specification, and the drawings is not particularly recited as "before," "subsequent to," or the like, and, furthermore, it should be noted that the processes can be executed in any order as long as the output of the preceding processes is not used in the subsequent processes. With regard to the flow of the processes in the claims, the specification, and the drawings, even if the processes are described using "first," "next," and the like for convenience, it does not mean that the processes must be executed in that order.

[0180] Explanation of Reference Numerals

[0181] 10: system, 20: network, 50: rain cloud, 55: rain cloud, 100: control device, 102: information holding section, 104: condition setting section, 106: weather forecast data acquisition section, 107: communication association information reception section, 108: communication association information prediction section, 109: wireless device control section, 110: switching determination section, 112: connection destination selection section, 116: establishment determination section, 118: learning data holding section, 120: model generation section, 122: model holding section, 124: model acquisition section, 210: wireless device, 212: transceiver, 214: transceiver, 215: repeater, 220: wireless device, 222: transceiver, 224: transceiver, 230: wireless device, 232: transceiver, 234: transceiver, 235: repeater, 240: wireless device, 242: transceiver, 244: transceiver, 250: wireless device, 260: wireless device, 270: wireless device, 280: wireless device, 290: wireless device, 300: communication terminal, 400: communication terminal, 500: weather data server, 1200: computer, 1210: host controller, 1212: CPU, 1214: RAM, 1216: graphics controller, 1218: display device, 1220: input / output controller, 1222: communication interface, 1224: storage device, 1226: DVD drive, 1227: DVD-ROM, 1230: ROM, 1240: input / output chip, 1242: keyboard.

Claims

1. A control device comprising: The meteorological forecast data acquisition unit acquires meteorological forecast data for each of the multiple wireless devices located on the ground, predicting the weather between one of the multiple wireless devices and the wireless device that can establish an optical wireless communication connection with that one of the multiple wireless devices. The communication association information receiving unit receives communication association information related to the communication of the wireless devices from each of the plurality of wireless devices, including operation rate information representing the operation rate, wherein the operation rate is the ratio of the period during which the wireless devices operate normally within a predetermined period. The switching determination unit determines, based on the weather forecast data between the wireless devices that have established an optical wireless communication connection with the wireless device and one of the plurality of wireless devices, whether to switch the connection destination of the optical wireless communication connection of the wireless device. The connection destination selection unit, in response to the handover determination unit determining that the connection destination of the optical wireless communication connection of the one wireless device is to be switched, selects the connection destination of the optical wireless communication connection of the one wireless device, as well as the connection destination of the optical wireless communication connection of other wireless devices among the plurality of wireless devices that need to switch the connection destination of the optical wireless communication connection, based on the weather forecast data and the communication association information of each of the plurality of wireless devices. as well as The wireless device control unit, based on the selection result of the connection destination selection unit, causes the plurality of wireless devices to switch the connection destination of their optical wireless communication connections. The connection destination selection unit selects the wireless device among the multiple wireless devices capable of establishing an optical wireless communication connection with the wireless device whose weather forecast data meets predetermined good weather conditions as the connection destination of the optical wireless communication connection of the wireless device. If there are multiple wireless devices whose weather forecast data meets the good weather conditions, the connection destination selection unit selects the wireless device with the highest operating rate among the multiple wireless devices whose weather forecast data meets the good weather conditions as the connection destination of the optical wireless communication connection of the wireless device.

2. A control device comprising: The meteorological forecast data acquisition unit acquires meteorological forecast data for each of the multiple wireless devices located on the ground, predicting the weather between one of the multiple wireless devices and the wireless device that can establish an optical wireless communication connection with that one of the multiple wireless devices. The communication association information receiving unit receives communication association information associated with the communication of the wireless devices from each of the plurality of wireless devices, including available bandwidth information, wherein the available bandwidth information represents the bandwidth that the wireless devices can utilize in optical wireless communication; The switching determination unit determines, based on the weather forecast data between the wireless devices that have established an optical wireless communication connection with the wireless device and one of the plurality of wireless devices, whether to switch the connection destination of the optical wireless communication connection of the wireless device. The connection destination selection unit, in response to the handover determination unit determining that the connection destination of the optical wireless communication connection of the one wireless device is to be switched, selects the connection destination of the optical wireless communication connection of the one wireless device, as well as the connection destination of the optical wireless communication connection of other wireless devices among the plurality of wireless devices that need to switch the connection destination of the optical wireless communication connection, based on the weather forecast data and the communication association information of each of the plurality of wireless devices. as well as The wireless device control unit, based on the selection result of the connection destination selection unit, causes the plurality of wireless devices to switch the connection destination of their optical wireless communication connections. The connection destination selection unit selects, from among the multiple wireless devices capable of establishing an optical wireless communication connection with the wireless device, the wireless device whose weather forecast data with the wireless device meets predetermined good weather conditions as the connection destination for the optical wireless communication connection of the wireless device. If there are multiple wireless devices whose weather forecast data meets the good weather conditions, the connection destination selection unit selects, from among the multiple wireless devices whose weather forecast data meets the good weather conditions, the wireless device with the widest available bandwidth as the connection destination for the optical wireless communication connection of the wireless device.

3. A control device comprising: The meteorological forecast data acquisition unit acquires meteorological forecast data for each of the multiple wireless devices located on the ground, predicting the weather between one of the multiple wireless devices and the wireless device that can establish an optical wireless communication connection with that one of the multiple wireless devices. The communication association information receiving unit receives communication association information related to the communication of the wireless devices from each of the plurality of wireless devices, including action rate information representing the action rate, wherein the action rate is the ratio of the period during which the wireless devices performed an action within a predetermined period. The switching determination unit determines, based on the weather forecast data between the wireless devices that have established an optical wireless communication connection with the wireless device and one of the plurality of wireless devices, whether to switch the connection destination of the optical wireless communication connection of the wireless device. The connection destination selection unit, in response to the handover determination unit determining that the connection destination of the optical wireless communication connection of the one wireless device is to be switched, selects the connection destination of the optical wireless communication connection of the one wireless device, as well as the connection destination of the optical wireless communication connection of other wireless devices among the plurality of wireless devices that need to switch the connection destination of the optical wireless communication connection, based on the weather forecast data and the communication association information of each of the plurality of wireless devices. as well as The wireless device control unit, based on the selection result of the connection destination selection unit, causes the plurality of wireless devices to switch the connection destination of their optical wireless communication connections. The connection destination selection unit selects the wireless device among the multiple wireless devices capable of establishing an optical wireless communication connection with the wireless device whose weather forecast data meets the predetermined good weather conditions as the connection destination of the optical wireless communication connection of the wireless device. If there are multiple wireless devices whose weather forecast data meets the good weather conditions, the connection destination selection unit selects the wireless device with the lowest operation rate among the multiple wireless devices whose weather forecast data meets the good weather conditions as the connection destination of the optical wireless communication connection of the wireless device.

4. A control device comprising: The information storage unit stores performance information representing the performance of the wireless device, including transmitter maximum output power information representing the maximum output power of the transmitter mounted on the wireless device. The weather forecast data acquisition unit acquires weather forecast data for each of the multiple wireless devices located on the ground, predicting the weather between one of the multiple wireless devices and the wireless device that can establish an optical wireless communication connection with the one of the multiple wireless devices. The communication association information receiving unit receives communication association information associated with the communication of each of the plurality of wireless devices. The switching determination unit determines, based on the weather forecast data between the wireless devices that have established an optical wireless communication connection with the wireless device and one of the plurality of wireless devices, whether to switch the connection destination of the optical wireless communication connection of the wireless device. The connection destination selection unit, in response to the handover determination unit determining that the connection destination of the optical wireless communication connection of the one wireless device is to be switched, selects the connection destination of the optical wireless communication connection of the one wireless device, as well as the connection destination of the optical wireless communication connection of other wireless devices among the plurality of wireless devices that need to switch the connection destination of the optical wireless communication connection, based on the weather forecast data and the communication association information of each of the plurality of wireless devices. as well as The wireless device control unit, based on the selection result of the connection destination selection unit, causes the plurality of wireless devices to switch the connection destination of their optical wireless communication connections. The connection destination selection unit selects, from among the multiple wireless devices capable of establishing an optical wireless communication connection with the wireless device, the wireless device whose weather forecast data with the wireless device meets predetermined good weather conditions as the connection destination for the optical wireless communication connection of the wireless device. If there are multiple wireless devices whose weather forecast data meets the good weather conditions, the connection destination selection unit selects, from among the multiple wireless devices whose weather forecast data meets the good weather conditions, the wireless device with the highest maximum output power of the transmitter mounted on the wireless device as the connection destination for the optical wireless communication connection of the wireless device.

5. A control device comprising: The meteorological forecast data acquisition unit acquires meteorological forecast data for each of the multiple wireless devices located on the ground, predicting the weather between one of the multiple wireless devices and the wireless device that can establish an optical wireless communication connection with that one of the multiple wireless devices. The communication association information receiving unit receives communication association information associated with the communication of each of the plurality of wireless devices. The switching determination unit determines, based on the weather forecast data between the wireless devices that have established an optical wireless communication connection with the wireless device and one of the plurality of wireless devices, whether to switch the connection destination of the optical wireless communication connection of the wireless device. The connection destination selection unit, in response to the handover determination unit determining that the connection destination of the optical wireless communication connection of the one wireless device is to be switched, selects the connection destination of the optical wireless communication connection of the one wireless device, as well as the connection destination of the optical wireless communication connection of other wireless devices among the plurality of wireless devices that need to switch the connection destination of the optical wireless communication connection, based on the weather forecast data and the communication association information of each of the plurality of wireless devices. as well as The wireless device control unit, based on the selection result of the connection destination selection unit, causes the plurality of wireless devices to switch the connection destination of their optical wireless communication connections. The wireless device control unit enables the wireless device that switches the connection destination of the optical wireless communication connection to establish a radio communication connection between the wireless device and the multiple wireless devices, where the wireless device is capable of establishing a radio communication connection.

6. The control device according to claim 5, wherein, The communication association information receiving unit also receives the communication association information of the wireless device after switching the connection destination of the optical wireless communication connection. The control device further includes an establishment determination unit, which determines whether to enable the wireless device to establish a radio wave communication connection based on the communication association information of the wireless device after switching the connection destination of the optical wireless communication connection. The wireless device control unit, in response to the establishment determination unit's determination that the wireless device should establish a radio communication connection, enables the wireless device to establish a radio communication connection between the wireless device and the wireless devices that are capable of establishing a radio communication connection.

7. The control device according to claim 6, wherein, The communication association information receiving unit receives the communication association information of the wireless device, including allocated bandwidth information, after switching the connection destination of the optical wireless communication connection. The allocated bandwidth information indicates the bandwidth allocated for communication between the wireless device and the wireless device that serves as the connection destination of the optical wireless communication connection of the wireless device. If the bandwidth allocated for communication between a wireless device after switching the connection destination of the optical wireless communication connection and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device is narrower than a predetermined bandwidth threshold, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

8. The control device according to claim 6, wherein, The communication association information receiving unit receives the communication association information of the wireless device, including received signal strength information, after switching the connection destination of the optical wireless communication connection. The received signal strength information indicates the received signal strength of the signal received by the wireless device from the wireless device that serves as the connection destination of the optical wireless communication connection of the wireless device. If, after switching the connection destination of the optical wireless communication connection, the received signal strength of the signal received by the wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the wireless device is lower than a predetermined received signal strength threshold, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

9. The control device according to claim 6, wherein, The communication association information receiving unit receives the communication association information of the wireless device, including delay information, after switching the connection destination of the optical wireless communication connection. The delay information indicates the communication delay between the wireless device and the wireless device that serves as the connection destination of the optical wireless communication connection of the wireless device. If the communication delay between a wireless device after switching the connection destination of an optical wireless communication connection and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device is longer than a predetermined delay threshold, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

10. The control device according to claim 6, wherein, The communication association information receiving unit receives the communication association information of the wireless device, including jitter information, after switching the connection destination of the optical wireless communication connection. The jitter is the variation in the delay per unit time of communication between the wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device. If the jitter in the communication between the wireless device after switching the connection destination of the optical wireless communication connection and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device is greater than a predetermined jitter threshold, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

11. The control device according to claim 6, wherein, The communication association information receiving unit receives, after switching the connection destination of the optical wireless communication connection, the communication association information of the wireless device, including error rate information representing the error rate, wherein the error rate is the ratio of erroneous data in the data received by the wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the wireless device. If the error rate of data received by a wireless device from the wireless device that is the connection destination of the optical wireless communication connection after switching the connection destination of the optical wireless communication connection is higher than a predetermined error rate threshold, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

12. The control device according to claim 6, wherein, The communication association information receiving unit receives the communication association information of the wireless device after switching the connection destination of the optical wireless communication connection, which includes packet loss rate information representing the packet loss rate. The packet loss rate is the ratio of data packets lost in data packets sent by the wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the wireless device. If the packet loss rate of a data packet sent by the wireless device to the wireless device that is the connection destination of the optical wireless communication connection after switching the connection destination of the optical wireless communication connection is higher than a predetermined packet loss rate threshold, the establishment determination unit determines to enable the wireless device to establish a radio wave communication connection.

13. The control device according to claim 5, wherein, The communication-related information receiving unit receives: The communication association information of a wireless device, which includes allocated bandwidth information indicating the bandwidth allocated for communication between the wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device; as well as The communication association information of a wireless device after switching the connection destination of an optical wireless communication connection includes bandwidth allocation information indicating the bandwidth allocated for communication between the wireless device and the wireless device that serves as the connection destination of the optical wireless communication connection of the wireless device. The control device further includes an establishment determination unit, which determines whether to enable the wireless device to establish a radio wave communication connection based on the communication association information of the wireless device before the connection destination of the switched optical wireless communication connection and the communication association information of the wireless device after the connection destination of the switched optical wireless communication connection. In response to the establishment determination unit's determination that a wireless device should establish a radio communication connection, the wireless device control unit enables the wireless device to establish a radio communication connection between the wireless device and other wireless devices capable of establishing such a connection. If the bandwidth allocated for communication between the wireless device after the connection destination of the switched optical wireless communication connection and the wireless device at the connection destination of the optical wireless communication connection of the wireless device is narrower than the bandwidth allocated for communication between the wireless device before the connection destination of the switched optical wireless communication connection and the wireless device at the connection destination of the optical wireless communication connection of the wireless device, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

14. The control device according to claim 5, wherein, The communication-related information receiving unit receives: The communication association information of a wireless device, which includes received signal strength information representing the received signal strength of a signal received by the wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, before switching the connection destination; as well as The communication association information of a wireless device after switching the connection destination of the optical wireless communication connection includes received signal strength information representing the received signal strength of signals received by the wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the wireless device. The control device further includes an establishment determination unit, which determines whether to enable the wireless device to establish a radio wave communication connection based on the communication association information of the wireless device before the connection destination of the switched optical wireless communication connection and the communication association information of the wireless device after the connection destination of the switched optical wireless communication connection. In response to the establishment determination unit's determination that a wireless device should establish a radio communication connection, the wireless device control unit enables the wireless device to establish a radio communication connection between the wireless device and other wireless devices capable of establishing such a connection. If the received signal strength of a signal received by a wireless device from the wireless device that is the connection destination of the optical wireless communication connection after switching the connection destination of the optical wireless communication connection is lower than the received signal strength of a signal received by the wireless device from the wireless device that is the connection destination of the optical wireless communication connection before switching the connection destination of the optical wireless communication connection, and is lower than a predetermined received signal strength threshold, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

15. The control device according to claim 5, wherein, The communication-related information receiving unit receives: The communication association information of a wireless device, which includes delay information indicating the communication delay between the wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, before switching the connection destination; as well as The communication association information of a wireless device after switching the connection destination of the optical wireless communication connection includes delay information representing the communication delay between the wireless device and the wireless device that serves as the connection destination of the optical wireless communication connection of the wireless device. The control device further includes an establishment determination unit, which determines whether to enable the wireless device to establish a radio wave communication connection based on the communication association information of the wireless device before the connection destination of the switched optical wireless communication connection and the communication association information of the wireless device after the connection destination of the switched optical wireless communication connection. In response to the establishment determination unit's determination that a wireless device should establish a radio communication connection, the wireless device control unit enables the wireless device to establish a radio communication connection between the wireless device and other wireless devices capable of establishing such a connection. If the communication delay between a wireless device after switching the connection destination of an optical wireless communication connection and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device is longer than a predetermined delay threshold compared to the communication delay between a wireless device before switching the connection destination of the optical wireless communication connection and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

16. The control device according to claim 5, wherein, The communication-related information receiving unit receives: The communication association information of a wireless device prior to switching the connection destination of an optical wireless communication connection includes jitter information representing the variation of the delay per unit time in communication between the wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, i.e., jitter information. as well as The communication association information of a wireless device after switching the connection destination of an optical wireless communication connection includes jitter information representing the variation of the delay per unit time in communication between the wireless device and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, i.e., jitter information. The control device further includes an establishment determination unit, which determines whether to enable the wireless device to establish a radio wave communication connection based on the communication association information of the wireless device before the connection destination of the switched optical wireless communication connection and the communication association information of the wireless device after the connection destination of the switched optical wireless communication connection. In response to the establishment determination unit's determination that a wireless device should establish a radio communication connection, the wireless device control unit enables the wireless device to establish a radio communication connection between the wireless device and other wireless devices capable of establishing such a connection. If the jitter of the communication between the wireless device after switching the connection destination of the optical wireless communication connection and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device is greater than a predetermined jitter threshold compared with the jitter of the communication between the wireless device before switching the connection destination of the optical wireless communication connection and the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, the establishment determination unit determines that the wireless device should establish a radio wave communication connection.

17. The control device according to claim 5, wherein, The communication-related information receiving unit receives: The communication association information of a wireless device, which includes error rate information (i.e., the ratio of erroneous data in the data received by the wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the wireless device) before switching the connection destination of the optical wireless communication connection of the wireless device; as well as The communication association information of a wireless device after switching the connection destination of the optical wireless communication connection includes error rate information, which represents the ratio of erroneous data in the data received by the wireless device from the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, i.e., the error rate. The control device further includes an establishment determination unit, which determines whether to enable the wireless device to establish a radio wave communication connection based on the communication association information of the wireless device before the connection destination of the switched optical wireless communication connection and the communication association information of the wireless device after the connection destination of the switched optical wireless communication connection. In response to the establishment determination unit's determination that a wireless device should establish a radio communication connection, the wireless device control unit enables the wireless device to establish a radio communication connection between the wireless device and other wireless devices capable of establishing such a connection. If the error rate of data received by a wireless device from the wireless device that is the connection destination of the optical wireless communication connection after switching the connection destination of the optical wireless communication connection is higher than the error rate of data received by a wireless device from the wireless device that is the connection destination of the optical wireless communication connection before switching the connection destination of the optical wireless communication connection, and is higher than a predetermined error rate threshold, the establishment determination unit determines to establish a radio wave communication connection for the wireless device.

18. The control device according to claim 5, wherein, The communication-related information receiving unit receives: The communication association information of a wireless device before switching the connection destination of the optical wireless communication connection includes packet loss rate information, which represents the ratio of lost data packets in the data packets sent by the wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, i.e., the packet loss rate. as well as The communication association information of a wireless device after switching the connection destination of the optical wireless communication connection includes packet loss rate information, which represents the ratio of lost data packets in the data packets sent by the wireless device to the wireless device that is the connection destination of the optical wireless communication connection of the wireless device, i.e., the packet loss rate. The control device further includes an establishment determination unit, which determines whether to enable the wireless device to establish a radio wave communication connection based on the communication association information of the wireless device before the connection destination of the switched optical wireless communication connection and the communication association information of the wireless device after the connection destination of the switched optical wireless communication connection. In response to the establishment determination unit's determination that a wireless device should establish a radio communication connection, the wireless device control unit enables the wireless device to establish a radio communication connection between the wireless device and other wireless devices capable of establishing such a connection. If the packet loss rate of data packets sent by the wireless device to the wireless device that is the connection destination of the optical wireless communication connection after switching the connection destination of the optical wireless communication connection is higher than the packet loss rate of data packets sent by the wireless device to the wireless device that is the connection destination of the optical wireless communication connection before switching the connection destination of the optical wireless communication connection, and is higher than a predetermined packet loss rate threshold, the establishment determination unit determines to establish a radio communication connection for the wireless device.

19. The control device according to any one of claims 5 to 18, wherein, The connection destination selection unit further selects the connection destination for the radio communication connection of the first wireless device from among the multiple wireless devices to which the first wireless device can establish radio communication connections, based on the meteorological forecast data between the first wireless device and each of the multiple wireless devices to which the first wireless device can establish radio communication connections, and the communication association information of each of the multiple wireless devices to which the first wireless device can establish radio communication connections. The wireless device control unit enables the wireless device to establish a radio communication connection between the wireless device and the wireless device selected by the connection destination selection unit as the radio communication connection destination of the wireless device.

20. A control device comprising: The meteorological forecast data acquisition unit acquires meteorological forecast data for each of the multiple wireless devices located on the ground, predicting the weather between one of the multiple wireless devices and the wireless device that can establish an optical wireless communication connection with that one of the multiple wireless devices. The communication association information receiving unit receives communication association information associated with the communication of each of the plurality of wireless devices. The switching determination unit determines, based on the weather forecast data between the wireless devices that have established an optical wireless communication connection with the wireless device and one of the plurality of wireless devices, whether to switch the connection destination of the optical wireless communication connection of the wireless device. The connection destination selection unit, in response to the handover determination unit determining that the connection destination of the optical wireless communication connection of the one wireless device is to be switched, selects the connection destination of the optical wireless communication connection of the one wireless device, as well as the connection destination of the optical wireless communication connection of other wireless devices among the plurality of wireless devices that need to switch the connection destination of the optical wireless communication connection, based on the weather forecast data and the communication association information of each of the plurality of wireless devices. as well as The wireless device control unit, based on the selection result of the connection destination selection unit, causes the plurality of wireless devices to switch the connection destination of their optical wireless communication connections. When a wireless device equipped with multiple transceivers for establishing an optical wireless communication connection is able to use the multiple transceivers for communication with a wireless device that is selected by the connection destination selection unit as the connection destination of the optical wireless communication connection of the wireless device, the wireless device control unit causes the wireless device to use the multiple transceivers to establish an optical wireless communication connection between the wireless device and the wireless device that is selected as the connection destination of the optical wireless communication connection of the wireless device, thereby causing the wireless device to switch the connection destination of the optical wireless communication connection.

21. The control device according to any one of claims 1 to 5 and 20, wherein, The control device also includes: The learning data storage unit stores learning data, which includes weather forecast data between the wireless device and the wireless devices that have established an optical wireless communication connection with the wireless device among the plurality of wireless devices, and received signal strength information indicating the received signal strength of the signal received by the wireless device from the wireless device that has established an optical wireless communication connection with the wireless device during the forecast period of the weather forecast data. as well as The model generation unit uses multiple learning data stored in the learning data storage unit as training data to generate an inference model through machine learning. The inference model infers the received signal strength of the signal received by the wireless device from the wireless device with which it has established an optical wireless communication connection during the forecast period of the weather forecast data, based on weather forecast data between the wireless device and the wireless devices among the plurality of wireless devices that have established an optical wireless communication connection with the wireless device. The handover determination unit uses the inference model generated by the model generation unit to infer the received signal strength of the signal received by the wireless device from the wireless device with which the wireless device has established an optical wireless communication connection during the forecast period of the weather forecast data, based on the weather forecast data between the wireless device and the wireless device with which the wireless device has established an optical wireless communication connection. If the inferred received signal strength is lower than a predetermined received signal strength threshold, the handover determination unit determines to switch the connection destination of the optical wireless communication connection of the wireless device.

22. A computer program product comprising a program for enabling a computer to function as a control device as claimed in any one of claims 1 to 5 and 20.

23. A control system, comprising: The control device according to any one of claims 1 to 5 and 20; and The aforementioned multiple wireless devices.

Images