WO2021090726A1

WO2021090726A1 - Information processing device, information processing method, and program

Info

Publication number: WO2021090726A1
Application number: PCT/JP2020/040146
Authority: WO
Inventors: 天野　浩; 将人小牧; 昌弘渡邉
Original assignee: ソニー株式会社
Priority date: 2019-11-08
Filing date: 2020-10-26
Publication date: 2021-05-14

Abstract

This information processing device comprises: a division unit that divides data outputted from a data output device into a plurality of divided data pieces; a first communication unit that communicates with a data storage device via a first network; a second communication unit that communicates, via a second network, with each of a plurality of transfer devices that communicate with the data storage device via the first network; and a distribution unit that distributes the plurality of divided data pieces to the first communication unit and each of the plurality of transfer devices, in accordance with the communication capability of the first communication unit and each of the plurality of transfer devices.

Description

Information processing equipment, information processing methods, and programs

This disclosure relates to information processing devices, information processing methods, and programs.

In order to efficiently transmit a large amount of data such as moving images, a technique of dividing the data into a plurality of data and transmitting the data to the client device is known. In this technique, when the divided data is transferred to the client device, the data expected to be requested is cached in the transfer device provided in the network. As a result, the time required for data distribution can be shortened.

Japanese Unexamined Patent Publication No. 2017-37411

The amount of data such as moving images is increasing with the increase in definition of images. Therefore, further speeding up in transmission of a large amount of data such as moving images is desired.

The present disclosure provides an information processing device, an information processing method, and a program capable of transferring data at high speed.

The information processing device according to one embodiment of the present disclosure includes a division unit that divides the data output from the data output device into a plurality of division data, and a first communication unit that communicates with the data storage device via the first network. And each of the plurality of transfer devices communicating with the data storage device via the first network, the second communication unit communicating via the second network, the first communication unit and the plurality of. The first communication unit and the distribution unit that distributes the plurality of divided data to each of the plurality of transfer devices are provided according to the communication performance of each of the transfer devices.

Further, in the information processing method according to one embodiment of the present disclosure, the information processing device divides the data output from the data output device into a plurality of divided data, and communicates with the data storage device via the first network. A plurality of transfer devices that communicate with the information processing device via the first communication unit and the second network, and a plurality of transfer devices that communicate with the data storage device via the first network. A process including distributing the plurality of divided data to each of the first communication unit and the plurality of transfer devices is executed according to the respective communication performances of the above.

Further, the program according to one embodiment of the present disclosure is a process of dividing the data output from the data output device into a plurality of divided data in the information processing device, and communicating with the data storage device via the first network. Each of the communication unit 1 and the plurality of transfer devices that communicate with the information processing device via the second network, and the plurality of transfer devices that communicate with the data storage device via the first network. The computer is made to execute a process of distributing the plurality of divided data to each of the first communication unit and the plurality of transfer devices according to the communication performance of the above.

It is a system block diagram which shows an example of the communication system in one Embodiment of this disclosure. It is a block diagram which shows an example of the 1st communication device. It is a figure which shows an example of the device information table. It is a figure which shows an example of a distribution table. It is a figure which shows an example of the data division method. It is a figure which shows an example of the data division method when the new division data is distributed. It is a block diagram which shows an example of the 2nd communication device. It is a block diagram which shows an example of a server. It is a sequence diagram which shows an example of the processing of a communication system at the time of registering a device information. It is a sequence diagram which shows an example of the processing of the communication system when the divided data is transmitted. It is a sequence diagram which shows an example of the processing of the communication system when new division data is distributed after the transmission of division data is completed. It is a sequence diagram which shows an example of the processing of the communication system when the distribution of the divided data fails. It is a sequence diagram which shows an example of the processing of the communication system when the transmission of the divided data fails. It is a flowchart which shows an example of the processing of the 1st communication apparatus. It is a flowchart which shows an example of the processing of the 2nd communication apparatus. It is a flowchart which shows an example of the processing of a server. It is a hardware block diagram which shows an example of the computer which realizes the function of the 1st communication device. It is a hardware block diagram which shows an example of the computer which realizes the function of the 2nd communication device. It is a hardware block diagram which shows an example of the computer which realizes the function of a server. It is a figure which shows another example of the data division method.

The information processing device, the information processing method, and the embodiment of the program will be described in detail below based on the drawings. The disclosed information processing apparatus, information processing method, and program are not limited by the following embodiments.

By the way, a wide area wireless line such as cellular has a wider coverage area than a short distance wireless line such as wireless LAN, so that it can be used in various places. For example, in news coverage, video data taken at an incident site or the like is transmitted to a broadcasting station server using a wide area wireless line. However, since a wide-area wireless line often has a narrower communication band than a short-distance wireless line, it takes time to transmit data. Therefore, it is difficult to quickly transmit data such as moving images taken at the scene of an incident to a server of a broadcasting station. In addition, the amount of data such as moving images is increasing with the recent increase in the definition of images. Therefore, further speeding up in transmission of a large amount of data such as moving images is desired. Therefore, the present disclosure provides a technique capable of transferring data at high speed.

[Configuration of communication system 1]
FIG. 1 is a system configuration diagram showing an example of a communication system 1 according to an embodiment of the present disclosure. The communication system 1 includes a first communication device 20 and a plurality of second communication devices 30-1 to 30-3. In the following, the second communication device 30 will be referred to when the plurality of second communication devices 30-1 to 30-3 are generically referred to without distinction. In the present embodiment, the communication system 1 includes three second communication devices 30, but the number of the second communication devices 30 included in the communication system 1 is not limited to three, and may be two or less. Often, there may be four or more. The first communication device 20 is an example of an information processing device, and the second communication device 30 is an example of a transfer device.

The first communication device 20 and the plurality of second communication devices 30 are portable information communication devices such as smartphones. The first communication device 20 and the plurality of second communication devices 30 are a portable PC (Personal Computer), a PDA (Personal Digital Assistant), or a wearable device having a communication function, as long as they are devices having a communication function. And so on.

The first communication device 20 is connected to the camera 10 via the communication cable 11 and receives data such as moving images and audio generated by the camera 10. The camera 10 is an example of a data output device that outputs data. The camera 10 and the first communication device 20 may be connected by a short-distance wireless line such as a wireless LAN.

The first communication device 20 divides the received data into a plurality of divided data. Then, the first communication device 20 transmits a part of the divided data to the base station 14 via the first network 12. In the present embodiment, the first network 12 is, for example, a wide area wireless line based on the communication standard of the 5th generation mobile communication. The first network 12 may be a wide area wireless line based on other communication standards such as a third generation mobile communication and a fourth generation mobile communication as long as it is a wide area wireless line.

Further, the first communication device 20 transmits a part of the divided data to each of the plurality of second communication devices 30 via the second network 13. In the present embodiment, the second network 13 is a short-range wireless line such as a wireless LAN. As such a wireless LAN, for example, a wireless LAN compliant with a communication standard such as IEEE (Institute of Electrical and Electronics Engineers) 802.11a / b / g / n / ac / ad / ax / ay can be used. If the second network 13 is a short-range wireless line, it is a short-range network based on another communication standard such as Bluetooth (registered trademark), UWB (Ultra Wide Band), or Wireless USB (Universal Serial Bus). It may be a wireless line. The first communication device 20 and each of the second communication devices 30 are connected by a communication cable, and the first communication device 20 transmits divided data to a plurality of second communication devices via the communication cable. It may be transmitted to each of 30.

In the present embodiment, the first communication device 20 transmits the divided data to each of the second communication devices 30 via the second network 13 based on the same communication standard. Not limited to this. For example, the first communication device 20 may transmit divided data to each second communication device 30 via a second network 13 based on a different communication standard. Further, the first communication device 20 is a second network 13 used when transmitting divided data according to the communication status between the first communication device 20 and each of the second communication devices 30. The communication standard may be switched.

Each second communication device 30 receives divided data from the first communication device 20 via the second network 13. Then, the second communication device 30 transmits the received divided data to the base station 14 via the first network 12. In the present embodiment, the first communication device 20 and the plurality of second communication devices 30 transmit the divided data via the first network 12 based on the same communication standard, but the disclosed technology is limited to this. I can't. For example, the first communication device 20 and the plurality of second communication devices 30 may transmit the divided data via the first network 12 based on different communication standards.

The base station 14 receives the divided data transmitted from the first communication device 20 and each of the second communication devices 30, and transfers the received divided data to the server 40 via a third network 15 such as the Internet. Send. The server 40 stores the received plurality of divided data in an internal storage unit, and restores the data before the division by combining the stored plurality of divided data. The server 40 is an example of a data storage device.

In this way, the data output from the camera 10 is divided into a plurality of divided data and distributed to the first communication device 20 and the plurality of second communication devices 30, respectively. Then, the divided data distributed to each of the first communication device 20 and the plurality of second communication devices 30 is transmitted to the server 40 via the first network 12. As a result, the data can be transmitted at a higher communication speed and the data can be transmitted more efficiently than when the data is transmitted by one first communication device 20.

[Configuration of First Communication Device 20]
FIG. 2 is a block diagram showing an example of the first communication device 20. The first communication device 20 includes a communication unit 200, a storage unit 210, a control unit 220, a communication unit 230, and a communication unit 240. The communication unit 200 receives the data output from the camera 10 via the communication cable 11 and stores the received data in the storage unit 210.

The storage unit 210 includes a data storage unit 211, a device information table storage unit 212, and a distribution table storage unit 213. The data storage unit 211 stores the data received by the communication unit 200. The device information table storage unit 212 stores the device information table described later. The distribution table storage unit 213 stores the distribution table described later.

FIG. 3 is a diagram showing an example of the device information table 2120. In the device information table 2120, static information and dynamic information regarding the communication performance of the device are stored in association with the device ID that identifies each device to which the divided data is distributed. In the present embodiment, the devices identified by the device ID are the first communication device 20 and the plurality of second communication devices 30.

As static information regarding communication performance, for example, information about a communication device, information about an OS (Operating System), information about a processor, information about a memory, information about a position detection device, and the like can be considered. As the information about the communication device, for example, the number of antennas, the antenna type (for example, directional antenna / omnidirectional antenna), the compatible communication standard, and the information such as the communication operator in the wide area wireless line can be considered. As the information about the OS, for example, information such as the type and version of the OS can be considered. As the information about the processor, for example, information such as the vendor, model number, and number of clocks of the processor can be considered. As the information related to the memory, for example, information such as the memory type and the data size can be considered. As the information about the position detection device, for example, information such as the type of the position detection device (GPS (Global Positioning System) / wireless LAN / geomagnetism / sound wave / beacon / UWB / RFID (Radio Frequency IDentifier), etc.) can be considered.

Dynamic information about communication performance includes communication performance that changes according to the communication environment. As the dynamic information regarding the communication performance, for example, information about the communication device, information about the processor, information about the memory, information about the position detection device, and the like can be considered. As the information about the communication device, for example, information such as the number of operating antennas, the communication standard in use, the radio wave intensity, the bandwidth, the modulation method, the frequency band, and the throughput can be considered. As the information about the processor, for example, information such as the current number of clocks can be considered. As the information regarding the memory, for example, information such as the current free space of the transmission buffer and the reception buffer can be considered. As the information about the position detection device, for example, information such as the position detection result and the orientation of the antenna can be considered.

FIG. 4 shows an example of the distribution table 2130. In the distribution table 2130, information such as the distribution destination of the divided data and the data size of the divided data is stored in association with the data ID that identifies each divided data. The main body of the divided data identified by the data ID is stored in the data storage unit 211 in association with the data ID. When the divided data is distributed, the identification information of the device to which the divided data is distributed is registered in the distribution destination column in association with the data ID of the divided data, and the data amount of the divided data is the data size column. To be registered in. However, if a problem occurs in the device to which the divided data is distributed, "redistribution" indicating that redistribution is necessary is registered in the distribution destination column. The divided data in which "redistribution" is registered is redistributed to other devices capable of transmitting the divided data.

The communication unit 230 communicates with the server 40 via the first network 12 by performing wireless communication with the base station 14 via the antenna 231 and the first network 12. The communication unit 230 is an example of the first communication unit. The communication unit 240 performs wireless communication with each of the plurality of second communication devices 30-1 to 30-3 via the antenna 241 and the second network 13. The communication unit 240 is an example of the second communication unit.

The control unit 220 has a division unit 221, a distribution unit 222, and a management unit 223. The management unit 223 receives device information from each of the second communication devices 30 via the communication unit 240. The device information includes a device ID and static information regarding communication performance in the device corresponding to the device ID. The management unit 223 extracts the device ID and the static information from the device information, associates the device ID with the extracted device ID, and registers the extracted static information in the device information table 2120. The static information about the communication unit 230 is registered in advance in the device information table 2120.

Further, when the management unit 223 does not receive the reception completion notification within a predetermined time for the divided data transmitted from the distribution unit 222 to the communication unit 230 and each of the second communication devices 30. , The reception failure notification is output to the distribution unit 222. The reception failure notification includes the data ID of the divided data for which the reception completion notification has not been notified.

Further, the management unit 223 receives the transmission completion notification regarding the transmission of the divided data after the divided data is transmitted from the distribution unit 222 to the communication unit 230 and the communication unit 240, and distributes the received transmission completion notification to the division unit 221 and the communication unit 240. Output to unit 222. The transmission completion notification indicates the data ID of the divided data, the device ID of the device to which the divided data is distributed, the dynamic information regarding the communication performance of the device, and whether or not the divided data has been successfully transmitted. Contains information. Further, the management unit 223 extracts the device ID and the dynamic information related to the communication performance from the transmission completion notification, and extracts the dynamic information registered in the device information table 2120 in association with the extracted device ID. Update with dynamic information. It should be noted that the dynamic information regarding the communication performance may be included in the transmission notification described later.

Further, the management unit 223 outputs a transmission failure notification to the distribution unit 222 when an abnormality is detected in the transmission of the divided data after the division data is output from the distribution unit 222 to the communication unit 230 and the communication unit 240. The transmission failure notification includes the data ID of the divided data. For example, the management unit 223 receives a transmission notification from the communication unit 230 or the second communication device 30 at predetermined time intervals between the time when the reception completion notification is received and the time when the transmission completion notification is received. If not, an abnormality in the transmission of divided data is detected. As the abnormality of the transmission of the divided data, for example, a failure of the second communication device 30 or a disconnection of the connection between the second communication device 30 and the base station 14 due to deterioration of the radio wave condition can be considered.

The division unit 221 determines whether or not the amount of received data stored in the data storage unit 211 has reached a predetermined threshold Th1 (for example, several hundred MB) or more. The threshold Th1 is an example of the first threshold. When the amount of received data becomes the threshold Th1 or more, the division unit 221 refers to the device information table 2120 and refers to the communication performance of the first communication device 20 and the plurality of second communication devices 30. To evaluate. For example, the division unit 221 highly evaluates the communication performance as the device has a faster data transmission speed.

Then, as shown in FIG. 5, for example, the division unit 221 divides the received data D stored in the data storage unit 211 into a plurality of division data D1 to D4 according to the evaluation result of the communication performance. FIG. 5 is a diagram showing an example of a data division method. In the present embodiment, the division unit 221 divides the received data D stored in the data storage unit 211 so that the data size becomes larger as the division data is distributed to the devices having a higher evaluation result of the communication performance. Divide into D1 to D4. The divided divided data D1 to D4 are deleted from the received data D. It is not necessary to divide all the received data D as divided data, and for example, a threshold value may be set and divided into divided data D1 to D4 within the threshold value. The threshold value may be the same value as the threshold value Th1 or may be provided with a different threshold value larger than this value.

Each of the divided data D1 to D4 includes a header having identification information of the destination server 40, information indicating the order in the original data, information indicating that it is the last divided data, and the like. .. Further, when the divided data is in a file format, information indicating the end or order may be associated with the file name. The division unit 221 assigns a data ID to each of the division data D1 to D4, and stores the division data D1 to D4 in the data storage unit 211 in association with the data ID. Further, the division unit 221 registers the data distribution destination and data size information in the distribution table 2130 in association with the data ID.

Further, when the division unit 221 receives the transmission completion notification including the information indicating that the transmission is successful from the management unit 223, the data storage unit 221 does not register the information indicating the redistribution in the distribution table 2130. Check the amount of received data stored in 211. Then, as shown in FIG. 6, for example, the division unit 221 determines whether or not the amount of received data D is equal to or greater than a predetermined threshold value Th2 (for example, several tens of MB). The threshold Th2 is an example of a second threshold. FIG. 6 is a diagram showing an example of a data division method when new division data is distributed.

When the data amount of the received data D is less than the threshold Th2, the division unit 221 waits until the data amount of the received data D becomes the threshold Th2 or more. As a result, it is possible to prevent the processing required for the transfer of the divided data from increasing with respect to the amount of data to be transferred due to the data size of the divided data becoming too small.

On the other hand, when the data amount of the received data D is the threshold value Th2 or more, the division unit 221 extracts the device ID of the device for which the transmission of the divided data has been completed from the transmission completion notification. Then, the division unit 221 extracts the static information and the dynamic information corresponding to the extracted device ID from the device information table 2120, and transmits the division data based on the extracted static information and the dynamic information. Evaluate the communication performance of the completed device. Then, the division unit 221 specifies the data size of the division data corresponding to the evaluation result, and divides the new division data D4 for the specified data size from the received data D. The remaining divided data D5 is continuously held in the data storage unit 211 as the received data D.

When the specified data size is larger than the amount of data of the received data D, the division unit 221 uses all of the received data D as new division data and sends the device to the transmission source of the transmission completion notification. Distribute. Further, when the specified data size is larger than the data amount of the received data D, the division unit 221 distributes the divided data until the data amount of the received data D reaches the specified data size. You may wait.

Further, when the division unit 221 receives the transmission completion notification including the information indicating that the transmission is successful from the management unit 223, the division unit 221 refers to the distribution table 2130 and registers the information indicating the redistribution in the distribution destination column. Determine if it is. When the information indicating the redistribution is registered in the distribution destination column, the data storage unit 211 executes the redistribution process.

In the redistribution process, the data ID corresponding to the information indicating the redistribution is extracted from the distribution table 2130, and the divided data corresponding to the extracted data ID is extracted from the data storage unit 211 as the divided data to be redistributed. To. Then, the division unit 221 extracts the device ID of the device for which the transmission of the division data has been completed from the transmission completion notification. Then, the division unit 221 evaluates the communication performance of the device for which the transmission of the division data has been completed based on the static information and the dynamic information corresponding to the extracted device ID, and the data of the division data corresponding to the evaluation result. Identify the size. Then, the data storage unit 211 determines whether or not the specified data size is equal to or larger than the data size of the divided data to be redistributed.

When the specified data size is equal to or larger than the data size of the divided data to be redistributed, the division unit 221 is extracted from the transmission completion notification in the distribution destination column in which the information indicating the redistribution is registered. Register the device ID. As a result, the divided data to be redistributed is redistributed by the distribution unit 222 to the devices whose transmission has been completed. In this way, when an abnormality occurs in communication via any of the devices of the first communication device 20 and the plurality of second communication devices 30, the divided data distributed to the device in which the abnormality has occurred becomes abnormal. Is redistributed to equipment that does not generate.

When the specified data size is smaller than the data size of the divided data to be redistributed, the division unit 221 uses the specified data size from the divided data to be redistributed as new divided data. Subdivide as. Then, the data storage unit 211 assigns a new data ID to each of the new divided data and the remaining divided data in the divided data to be redistributed, and associates the data storage unit 211 with the data ID. Store in. Further, the division unit 221 sets the device ID extracted from the transmission completion notification as the distribution destination, associates it with the data ID of the new division data, and sets the distribution destination and the data size of the new division data in the distribution table 2130. sign up. Further, for the remaining divided data in the divided data to be redistributed, the division unit 221 sets the distribution destination as information indicating redistribution, associates the distribution destination and the data size with the data ID, and sets the distribution table 2130. Register with.

The distribution unit 222 applies the divided data divided by the division unit 221 according to the communication performance of the first communication device 20 and the plurality of second communication devices 30, to the first communication device 20 and the plurality of first communication devices 20. Distribute to each of the two communication devices 30. For example, the distribution unit 222 acquires the divided data from the data storage unit 211, and acquires the distribution destination associated with the data ID of the acquired divided data from the distribution table 2130. Then, the distribution unit 222 outputs the divided data corresponding to the data ID whose distribution destination is the first communication device 20 to the communication unit 230 together with the data ID. Further, the distribution unit 222 outputs the divided data corresponding to the data ID whose distribution destination is the second communication device 30 to the communication unit 240 together with the information indicating the distribution destination and the data ID. The communication unit 240 transmits the divided data and the data ID output from the distribution unit 222 to the second communication device 30 corresponding to the distribution destination via the antenna 241 and the second network 13.

Further, when the distribution unit 222 receives the transmission completion notification including the information indicating that the transmission is successful from the management unit 223, the distribution unit 222 extracts the data ID from the transmission completion notification. Then, the distribution unit 222 deletes the divided data stored in the data storage unit 211 associated with the extracted data ID from the data storage unit 211. Further, the distribution unit 222 deletes the distribution destination and data size information stored in the distribution table 2130 in association with the extracted data ID from the distribution table 2130.

Further, when the distribution unit 222 receives the reception failure notification, the transmission completion notification including the information indicating that the transmission has failed, or the transmission failure notification from the management unit 223, the distribution unit 222 extracts the data ID from these notifications. Then, the distribution unit 222 registers the information indicating the redistribution in the distribution destination stored in the distribution table 2130 in association with the extracted data ID.

[Configuration of Second Communication Device 30]
FIG. 7 is a block diagram showing an example of the second communication device 30. The second communication device 30 includes a communication unit 300, a storage unit 310, a communication unit 320, and a control unit 330. The communication unit 300 performs wireless communication with the first communication device 20 via the antenna 301 and the second network 13. The communication unit 320 performs wireless communication with the base station 14 via the antenna 321 and the first network 12. The storage unit 310 has a data storage unit 311. The data storage unit 311 stores the divided data in association with the data ID.

The control unit 330 has a management unit 331. When a wireless communication path is established with the first communication device 20 via the second network 13, the management unit 331 transfers the device information of the second communication device 30 to the communication units 300 and the second communication unit 331. It transmits to the first communication device 20 via the network 13. The device information includes the device ID of the second communication device 30 and static information regarding the communication performance of the second communication device 30.

Further, when the management unit 331 succeeds in receiving the divided data and the data ID from the first communication device 20 via the communication unit 300 and the second network 13, the received divided data corresponds to the received data ID. It is attached and stored in the data storage unit 311. Then, the management unit 331 transmits a reception completion notification including the data ID to the first communication device 20 via the communication unit 300 and the second network 13.

Then, the management unit 331 starts transmitting the divided data stored in the data storage unit 311 via the communication unit 320 and the first network 12. From the start of transmission of the divided data to the normal completion of the transmission of the divided data, the management unit 331 sends a transmission notification to the communication unit 300 and the communication unit 300 at predetermined time intervals (for example, 3 seconds). The data is transmitted to the first communication device 20 via the second network 13. The transmission notification includes the device ID of the second communication device 30 and the data ID of the divided data.

Then, when the transmission of the divided data is completed normally, the management unit 331 sends a transmission completion notification including information indicating that the transmission of the divided data is successful via the communication unit 300 and the second network 13. Is transmitted to the communication device 20 of. The transmission completion notification includes the device ID of the second communication device 30, the data ID of the divided data, and the communication performance of the second communication device 30, in addition to the information indicating that the transmission of the divided data has been successful. Contains dynamic information.

If the transmission of the divided data is not completed normally, the management unit 331 sends a transmission completion notification including information indicating that the transmission of the divided data has failed via the communication unit 300 and the second network 13. It transmits to the first communication device 20.

In the present embodiment, the management unit 331 receives new divided data from the first communication device 20 after the transmission of the divided data received from the first communication device 20 is completed. Not limited. For example, the management unit 331 may receive new divided data from the first communication device 20 before the transmission of the divided data received from the first communication device 20 is completed. As a result, when the transmission of the divided data is completed, the management unit 331 can start the transmission of the new divided data more quickly, and the throughput in the data transmission can be improved.

[Configuration of server 40]
FIG. 8 is a block diagram showing an example of the server 40. The server 40 includes a communication unit 400, a storage unit 410, and a control unit 420. The communication unit 400 communicates with the base station 14 via the third network 15. The storage unit 410 has a data storage unit 411. The data storage unit 411 stores the divided data.

The control unit 420 has a management unit 421. When the divided data is received via the communication unit 400, the management unit 421 refers to the header of the received divided data and determines whether or not the divided data is the last divided data. When the received divided data is not the last divided data, the management unit 421 stores the received divided data in the data storage unit 411.

On the other hand, when the received divided data is the last divided data, the management unit 421 includes the received divided data and the divided data stored in the data storage unit 411 in the header of each divided data. Extract the information indicating the order in which they are displayed. Then, the management unit 421 restores the data before the division by combining the divided data based on the information indicating the extracted order. The restored data will be used for broadcasting and the like.

[Processing of the first communication device 20 and the second communication device 30 at startup]
FIG. 9 is a sequence diagram showing an example of processing of the communication system 1 when registering device information. For example, in the first communication device 20 and each of the second communication devices 30, the communication system 1 is illustrated in FIG. 9 at a predetermined timing such as when a program that executes the process according to the present embodiment is started. Start the process.

First, the communication unit 240 of the second communication device 30 and each of the second communication devices 30 execute a connection process for establishing a wireless communication path via the second network 13 (S100). Then, each of the second communication devices 30 transmits the device information to the first communication device 20 via the second network 13 (S101). The device information includes the device ID of each second communication device 30 and static information regarding communication performance.

The management unit 223 of the control unit 220 transmits the information of the server 40 to which the divided data is transmitted to the respective second communication devices 30, and each second communication device 30 communicates with the server 40. The communication state with the server 40 may be measured by transmitting and receiving test packets. Then, each of the second communication devices 30 may include the measured communication state in the device information as a part of the dynamic information regarding the communication performance and transmit it to the first communication device 20.

Next, the communication unit 240 transmits the device information received from each of the second communication devices 30 to the control unit 220 (S102). The management unit 223 of the control unit 220 extracts the device ID and the static information from the device information received from the communication unit 240, associates the device ID with the extracted device ID, and stores the extracted static information. It is registered in the device information table 2120 in 210 (S103). The static information of the first communication device 20 is registered in advance in the device information table 2120.

[Processing at the start of split data transmission]
FIG. 10 is a sequence diagram showing an example of processing of the communication system 1 when the divided data is transmitted.

First, the camera 10 transmits data to the first communication device 20 via the communication cable 11 (S110). The communication unit 200 of the first communication device 20 receives the data transmitted from the camera 10 and stores the received data in the data storage unit 211 of the storage unit 210 (S111).

Then, when the amount of data of the received data stored in the data storage unit 211 becomes the threshold Th1 or more, the division unit 221 refers to the device information table 2120 and refers to the first communication device 20 and the plurality of first communication devices 20. The communication performance of each of the communication devices 30 of 2 is evaluated. Then, the division unit 221 divides the received data stored in the data storage unit 211 into a plurality of division data according to the evaluation result of the communication performance (S112).

Next, the division unit 221 assigns a data ID to each division data, and stores the division data in the data storage unit 211 in association with the data ID. Further, the division unit 221 registers the data distribution destination and data size information in the distribution table 2130 in association with the data ID (S113).

Next, the distribution unit 222 acquires the divided data from the data storage unit 211, and acquires the distribution destination associated with the data ID of the acquired divided data from the distribution table 2130. Then, the distribution unit 222 outputs the divided data corresponding to the data ID whose distribution destination is the first communication device 20 to the communication unit 230 together with the data ID (S114). Further, the distribution unit 222 outputs the divided data corresponding to the data ID whose distribution destination is the second communication device 30 to the communication unit 240 together with the information indicating the distribution destination and the data ID (S115). The communication unit 240 transmits the divided data and the data ID output from the distribution unit 222 to the second communication device 30 corresponding to the distribution destination via the second network 13 (S116).

When the communication unit 230 succeeds in receiving the divided data and the data ID, the communication unit 230 outputs a reception completion notification including the data ID of the received divided data to the control unit 220 (S117). Further, when the management unit 331 of each of the second communication devices 30 succeeds in receiving the divided data and the data ID from the first communication device 20 via the second network 13, the received divided data is received. It is stored in the data storage unit 311 in association with the data ID. Then, the management unit 331 transmits a reception completion notification including the data ID to the first communication device 20 via the communication unit 300 and the second network 13 (S118). The communication unit 240 outputs the reception completion notification received from the second communication device 30 to the control unit 220 (S119).

Next, the communication unit 230 and each of the second communication devices 30 start transmitting the divided data via the first network 12 (S120). Then, the communication unit 230 outputs a transmission notification to the control unit 220 at predetermined time intervals (S121). Each of the second communication devices 30 also transmits a transmission notification to the first communication device 20 at predetermined time intervals (S122). The communication unit 240 outputs the transmission notification received from each of the second communication devices 30 to the control unit 220 (S123).

[Processing when split data transmission is completed]
FIG. 11 is a sequence diagram showing an example of processing of the communication system when new divided data is distributed after the transmission of the divided data is completed. In the example of FIG. 11, the processing of the communication system 1 when the transmission of the divided data is completed in the second communication device 30-1 is shown.

First, when the transmission of the divided data is completed, the second communication device 30-1 transmits a transmission completion notification to the first communication device 20 via the second network 13 (S130). The transmission completion notification indicates the data ID of the divided data, the device ID of the device to which the divided data is distributed, the dynamic information regarding the communication performance of the device, and whether or not the divided data has been successfully transmitted. Contains information. The communication unit 240 outputs the received transmission completion notification to the control unit 220 (S131).

The management unit 223 of the control unit 220 extracts the device ID and the dynamic information related to the communication performance from the transmission completion notification, and associates the extracted device ID with the dynamic information registered in the device information table 2120. Update with the extracted dynamic information (S132). Then, the management unit 223 outputs the received transmission completion notification to the division unit 221 and the distribution unit 222.

Next, when the distribution unit 222 receives the transmission completion notification including the information indicating that the transmission is successful, the distribution unit 222 extracts the data ID from the transmission completion notification. Then, the distribution unit 222 deletes the divided data stored in the data storage unit 211 associated with the extracted data ID from the data storage unit 211. Further, the distribution unit 222 deletes the distribution destination and data size information stored in the distribution table 2130 in association with the extracted data ID from the distribution table 2130 (S133).

Next, the division unit 221 determines whether or not information indicating redistribution is registered in the distribution table 2130 (S134). When the information indicating redistribution is not registered in the distribution table 2130 and the amount of received data stored in the data storage unit 211 is the threshold Th2 or more, the division unit 221 transmits the division data. The device ID of the completed device is extracted from the transmission completion notification. Then, the division unit 221 extracts the static information and the dynamic information corresponding to the extracted device ID from the device information table 2120. Then, the division unit 221 evaluates the communication performance of the device for which the transmission of the division data has been completed based on the extracted static information and the dynamic information, and has received the division data of the data size corresponding to the evaluation result. Divide from data D (S135).

Next, the division unit 221 assigns a data ID to the division data, associates the data ID with the data ID, and stores the division data in the data storage unit 211. Further, the division unit 221 registers the data distribution destination and data size information in the distribution table 2130 in association with the data ID (S136).

Next, the distribution unit 222 outputs the divided data to the communication unit 240 together with the information indicating the distribution destination and the data ID (S137). The communication unit 240 transmits the divided data and the data ID output from the distribution unit 222 to the second communication device 30-1 corresponding to the distribution destination via the second network 13 (S138).

When the second communication device 30-1 succeeds in receiving the divided data and the data ID from the first communication device 20 via the second network 13, the second communication device 30-1 associates the received divided data with the received data ID. Is stored in the data storage unit 311. Then, the second communication device 30-1 transmits a reception completion notification to the first communication device 20 (S139). The communication unit 240 transmits the reception completion notification received from the second communication device 30 to the control unit 220 (S140). Then, the second communication device 30-1 starts transmitting the divided data (S141), and transmits a transmission notification to the first communication device 20 at predetermined time intervals (S142). The communication unit 240 outputs the transmission notification received from the second communication device 30-1 to the control unit 220 (S143).

[Processing when distribution of divided data fails]
FIG. 12 is a sequence diagram showing an example of processing of the communication system 1 when the distribution of the divided data fails. In the example of FIG. 12, processing when the distribution of the divided data from the first communication device 20 to the second communication device 30-1 fails is shown.

First, the control unit 220 outputs the divided data to be distributed to the second communication device 30-1 to the communication unit 240 together with the data ID (S150). The communication unit 240 transmits the divided data together with the data ID to the second communication device 30-1 via the second network 13 (S151). However, for example, when the communication environment between the first communication device 20 and the second communication device 30-1 is poor, the second communication device 30-1 cannot receive the divided data, or the reception completion notification. May not reach the first communication device 20 (S152).

The management unit 223 of the control unit 220 does not receive the reception completion notification from the second communication device 30-1 within a predetermined time for the divided data transmitted to the second communication device 30-1. If so, a reception error is detected (S153). Then, the management unit 223 outputs a reception failure notification including the data ID of the divided data for which the reception completion notification has not been notified to the distribution unit 222.

The distribution unit 222 extracts the data ID from the reception failure notification received from the management unit 223. Then, the distribution unit 222 registers the information indicating the redistribution in the distribution destination stored in the distribution table 2130 in association with the extracted data ID (S154).

Next, when the transmission of the divided data is completed in the second communication device 30-2, the second communication device 30-2 sends a transmission completion notification to the first communication device 20 via the second network 13. Transmit (S155). The communication unit 240 outputs the received transmission completion notification to the control unit 220 (S156).

The management unit 223 of the control unit 220 extracts the device ID and the dynamic information related to the communication performance from the transmission completion notification, and associates the extracted device ID with the dynamic information registered in the device information table 2120. Update with the extracted dynamic information (S157). Then, the management unit 223 outputs the received transmission completion notification to the division unit 221 and the distribution unit 222.

Next, when the distribution unit 222 receives the transmission completion notification including the information indicating that the transmission is successful, the distribution unit 222 extracts the data ID from the transmission completion notification. Then, the distribution unit 222 deletes the divided data stored in the data storage unit 211 associated with the extracted data ID from the data storage unit 211. Further, the distribution unit 222 deletes the distribution destination and data size information stored in the distribution table 2130 in association with the extracted data ID from the distribution table 2130 (S158).

Next, the division unit 221 determines whether or not information indicating redistribution is registered in the distribution table 2130 (S159). Since the information indicating the redistribution is registered in the distribution table 2130 in step S154, the division unit 221 executes the redistribution process.

In the redistribution process, the data ID corresponding to the information indicating the redistribution is extracted from the distribution table 2130, and the divided data corresponding to the extracted data ID is extracted from the data storage unit 211 as the divided data to be redistributed. To. Then, the division unit 221 extracts the device ID of the second communication device 30-2 for which the transmission of the division data is completed from the transmission completion notification. Then, the division unit 221 evaluates the communication performance of the second communication device 30-2 for which the transmission of the division data is completed based on the static information and the dynamic information corresponding to the extracted device ID, and the evaluation result. Specify the data size of the divided data corresponding to. Then, if the specified data size is equal to or larger than the data size of the divided data to be redistributed, the data storage unit 211 displays the transmission completion notification in the distribution destination column in which the information indicating the redistribution is registered. The device ID of the extracted second communication device 30-2 is registered.

The distribution unit 222 outputs the divided data corresponding to the data ID whose distribution destination is the second communication device 30-2 to the communication unit 240 together with the data ID (S160). The communication unit 240 transmits the divided data together with the data ID to the second communication device 30-2 via the second network 13 (S161). As a result, when an abnormality occurs in the communication via the second communication device 30-1, the divided data distributed to the second communication device 30-1 in which the abnormality has occurred does not have an abnormality. It is redistributed to the communication device 30-2 of 2.

[Processing when transmission of divided data fails]
FIG. 13 is a sequence diagram showing an example of processing of the communication system 1 when transmission of divided data fails. In the example of FIG. 13, the processing when the transmission of the divided data from the second communication device 30-1 to the server 40 fails is shown.

First, the control unit 220 outputs the divided data to be distributed to the second communication device 30-1 to the communication unit 240 together with the data ID (S170). The communication unit 240 transmits the divided data together with the data ID to the second communication device 30-1 via the second network 13 (S171). When the reception of the divided data is completed, the second communication device 30-1 transmits a reception completion notification to the first communication device 20 via the second network 13 (S172). The communication unit 240 outputs the reception completion notification received from the second communication device 30-1 to the control unit 220 (S173).

Next, the second communication device 30-1 starts transmitting the divided data via the first network 12 (S174). However, for example, when the communication environment between the second communication device 30-1 and the base station 14 is poor, the wireless communication path between the second communication device 30-1 and the base station 14 is cut off. A communication disconnection occurs between the second communication device 30-1 and the server 40. If the communication environment between the first communication device 20 and the second communication device 30-1 deteriorates after the transmission of the divided data is started, the second communication device 30-1 will be used. The transmission notification may not reach the first communication device 20.

The management unit 223 of the control unit 220 receives a transmission notification from the second communication device 30-1 at predetermined time intervals between the time when the reception completion notification is received and the time when the transmission completion notification is received. If not, a transmission error of the second communication device 30-1 is detected (S175). Then, the management unit 223 outputs a transmission failure notification including the data ID of the divided data in which the transmission error is detected to the distribution unit 222.

The second communication device 30-1 sends a transmission completion notification to the first communication device 20 including information indicating that the transmission of the divided data has failed when the communication with the server 40 is interrupted. You may send it. The management unit 223 also detects a transmission error of the second communication device 30-1 even when a transmission completion notification including information indicating that the transmission of the divided data has failed is received from the second communication device 30-1. To do.

The distribution unit 222 extracts the data ID from the transmission failure notification received from the management unit 223. Then, the distribution unit 222 registers the information indicating the redistribution in the distribution destination stored in the distribution table 2130 in association with the extracted data ID (S176). Hereinafter, the same processing as the processing after step S155 described with reference to FIG. 12 is executed. As a result, when an abnormality occurs in the communication via the second communication device 30-1, the divided data distributed to the second communication device 30-1 in which the abnormality has occurred does not have an abnormality. It is redistributed to the communication device 30-2 of 2.

[Processing of the first communication device 20]
FIG. 14 is a flowchart showing an example of processing of the first communication device 20. For example, the first communication device 20 starts the process illustrated in FIG. 14 at a predetermined timing such as when a program that executes the process illustrated in FIG. 14 is started.

First, the communication unit 240 executes a connection process for establishing a wireless communication path via the second network 13 with each of the second communication devices 30 (S200). Then, the management unit 223 collects device information from each of the second communication devices 30 via the communication unit 240 and the second network 13 (S201). Then, the management unit 223 extracts the device ID and the static information from the device information, associates the extracted device ID with the extracted device ID, and registers the extracted static information in the device information table 2120 in the storage unit 210. ..

Next, the communication unit 200 starts receiving the data output from the camera 10 via the communication cable 11, and stores the received data in the storage unit 210 (S202). Then, the division unit 221 determines whether or not the amount of data of the received data stored in the data storage unit 211 has reached the threshold value Th1 or more (S203). When the amount of received data is less than the threshold Th1 (S203: No), the process shown in step S203 is executed again.

When the amount of received data exceeds the threshold Th1 (S203: Yes), the division unit 221 refers to the device information table 2120 and refers to the first communication device 20 and the plurality of second communication devices 30. Evaluate the communication performance of each of the above. Then, the division unit 221 divides the received data stored in the data storage unit 211 into a plurality of division data according to the evaluation result of the communication performance (S204). If the received data contains information indicating the end, the information indicating the end is added to the header of the divided data. Step S204 is an example of the process of dividing.

Next, the division unit 221 assigns a data ID to each division data, and stores the division data in the data storage unit 211 in association with the data ID. Further, the division unit 221 registers the data distribution destination and data size information in the distribution table 2130 in association with the data ID (S205).

Next, the distribution unit 222 distributes a plurality of division data divided by the division unit 221 (S206). In step S206, the distribution unit 222 acquires the divided data from the data storage unit 211, and acquires the distribution destination associated with the data ID of the acquired divided data from the distribution table 2130. Then, the distribution unit 222 transmits the divided data corresponding to the data ID whose distribution destination is the first communication device 20 to the communication unit 230 together with the data ID. Further, the distribution unit 222 outputs the divided data corresponding to the data ID whose distribution destination is the second communication device 30 to the communication unit 240 together with the information indicating the distribution destination and the data ID. The communication unit 240 transmits the divided data and the data ID output from the distribution unit 222 to the second communication device 30 corresponding to the distribution destination via the second network 13. As a result, the plurality of divided data divided by the division unit 221 is distributed to the communication unit 230 and each of the second communication devices 30. Step S206 is an example of the process of distribution.

Next, the management unit 223 determines whether or not a reception error has been detected (S207). The management unit 223 determines whether or not a reception error has been detected by determining whether or not the reception completion notification has been received within a predetermined time after the divided data is distributed. When a reception error is detected (S207: Yes), the management unit 223 transmits a reception failure notification to the distribution unit 222. Then, the distribution unit 222 executes the process shown in step S209.

On the other hand, when a reception error is not detected (S207: No), the management unit 223 determines whether or not a transmission error has been detected (S208). For example, when the management unit 223 does not receive the transmission notification at predetermined time intervals between the reception of the reception completion notification and the reception of the transmission completion notification, the management unit 223 fails to transmit the divided data. A transmission error is detected when a transmission completion notification containing information indicating that the data has been sent is received. When a transmission error is detected (S208: Yes), the management unit 223 transmits a transmission failure notification to the distribution unit 222.

Then, the distribution unit 222 extracts the data ID from the reception failure notification or the transmission failure notification. Then, the distribution unit 222 registers the information indicating the redistribution in the distribution destination stored in the distribution table 2130 in association with the extracted data ID (S209). Then, the process shown in step S207 is executed again.

When a transmission error is not detected (S208: No), the management unit 223 determines whether or not a transmission completion notification including information indicating that the divided data has been successfully transmitted has been received (S210). If the transmission completion notification including the information indicating that the divided data has been successfully transmitted has not been received (S210: No), the process shown in step S207 is executed again.

When a transmission completion notification including information indicating that the divided data has been successfully transmitted is received (S210: Yes), the management unit 223 extracts the device ID and the dynamic information regarding the communication performance from the transmission completion notification. Then, the management unit 223 updates the dynamic information registered in the device information table 2120 in association with the extracted device ID with the extracted dynamic information (S211). Then, the management unit 223 outputs the received transmission completion notification to the division unit 221 and the distribution unit 222.

Next, the distribution unit 222 extracts the data ID from the transmission completion notification, and deletes the divided data stored in the data storage unit 211 in association with the extracted data ID from the data storage unit 211 (S212). .. Further, the distribution unit 222 deletes the distribution destination and data size information stored in the distribution table 2130 in association with the extracted data ID from the distribution table 2130.

Next, the division unit 221 determines whether or not information indicating redistribution is registered in the distribution table 2130 (S213). When the information indicating the redistribution is registered in the distribution table 2130 (S213: Yes), the division unit 221 executes the above-mentioned redistribution process (S214). Then, by executing the process shown in step S206 again, the divided data to be redistributed is redistributed to the device of the transmission source of the transmission completion notification including the information indicating that the transmission was successful. ..

On the other hand, when the information indicating redistribution is not registered in the distribution table 2130 (S213: No), the data amount of the received data stored in the data storage unit 211 in the division unit 221 is the threshold Th2 or more. Whether or not it is determined (S215). When the amount of received data is less than the threshold Th2 (S215: No), the division unit 221 again executes the process shown in step S215.

On the other hand, when the data amount of the received data is the threshold Th2 or more (S215: Yes), the division unit 221 extracts the device ID of the device for which the transmission of the divided data has been completed from the transmission completion notification. Then, the division unit 221 extracts the static information and the dynamic information corresponding to the extracted device ID from the device information table 2120, and transmits the division data based on the extracted static information and the dynamic information. Evaluate the communication performance of the completed device. Then, the division unit 221 specifies the data size of the division data corresponding to the evaluation result, and divides the new division data corresponding to the specified data size from the received data (S216).

Next, the division unit 221 assigns a data ID to the division data, associates the data ID with the data ID, and stores the division data in the data storage unit 211. Further, the division unit 221 registers the data distribution destination and data size information in the distribution table 2130 in association with the data ID (S217). Then, the process shown in step S206 is executed again.

[Processing of the second communication device 30]
FIG. 15 is a flowchart showing an example of processing of the second communication device 30. For example, the second communication device 30 starts the process illustrated in FIG. 15 at a predetermined timing such as when a program that executes the process illustrated in FIG. 15 is started.

First, the communication unit 300 executes a connection process for establishing a wireless communication path via the second network 13 with the first communication device 20 (S300). Then, the management unit 331 transmits the device information of the second communication device 30 to the first communication device 20 via the second network 13 (S301).

Next, the management unit 331 receives the data ID and the divided data from the first communication device 20 via the second network 13, and determines whether or not the data ID and the divided data have been successfully received (S302. ). If the reception of the data ID and the divided data fails (S302: No), the management unit 331 executes the process shown in step S302 again.

On the other hand, when the data ID and the divided data are successfully received (S302: Yes), the management unit 331 stores the received divided data in the data storage unit 311 in association with the received data ID. Then, the management unit 331 transmits a reception completion notification including the data ID to the first communication device 20 via the second network 13 (S303). Then, the management unit 331 starts transmitting the divided data stored in the data storage unit 311 via the communication unit 320 and the first network 12 (S304).

Next, the management unit 331 transmits a transmission notification to the first communication device 20 via the second network 13 at predetermined time intervals (S305). Then, the management unit 331 determines whether or not the transmission of the divided data is completed (S306). When the transmission of the divided data is completed normally (S306: Yes), the management unit 331 sends a transmission completion notification including information indicating that the transmission of the divided data is successful to the first via the second network 13. It is transmitted to the communication device 20 (S307). Then, the process shown in step S302 is executed again.

On the other hand, when the transmission of the divided data is not completed (S306: No), the management unit 331 determines whether or not the communication with the server 40 via the base station 14 is continued (S308). When communication with the server 40 is continued (S308: Yes), the process shown in step S305 is executed again. On the other hand, when the communication with the server 40 is interrupted (S308: No), the management unit 331 sends a transmission completion notification including information indicating that the transmission of the divided data has failed via the second network 13. Is transmitted to the first communication device 20 (S309). Then, the second communication device 30 ends the process shown in this flowchart.

[Processing of server 40]
FIG. 16 is a flowchart showing an example of processing by the server 40. For example, the server 40 starts the process illustrated in FIG. 16 at a predetermined timing such as when a program that executes the process illustrated in FIG. 16 is started.

First, the management unit 421 determines whether or not the divided data has been received via the third network 15 (S400). When the divided data is not received (S400: No), the process shown in step S400 is executed again.

On the other hand, when the divided data is received (S400: Yes), the management unit 421 refers to the header of the received divided data and determines whether or not the divided data is the last divided data (S401). When the received divided data is not the last divided data (S401: No), the management unit 421 stores the received divided data in the data storage unit 411 (S402), and executes the process shown in step S400 again. To do.

On the other hand, when the received divided data is the last divided data (S401: Yes), the management unit 421 receives the received divided data and the divided data stored in the data storage unit 411, respectively. Extract the information indicating the order contained in the header of. Then, the management unit 421 restores the data before the division by combining the divided data based on the information indicating the extracted order (S403). Then, the server 40 ends the process shown in this flowchart.

[hardware]
FIG. 17 is a hardware configuration diagram showing an example of a computer 2000 that realizes the function of the first communication device 20. The computer 2000 includes an interface circuit 2001, a memory 2002, a processor 2003, a radio circuit 2004, and a radio circuit 2005.

The interface circuit 2001 is an interface for performing wired communication with the camera 10. The interface circuit 2001 realizes the function of the communication unit 200.

The wireless circuit 2004 performs processing such as modulation and up-conversion on the signal output from the processor 2003 according to a wireless communication method predetermined in the first network 12, and transfers the processed signal to space via the antenna 231. Radiate. Further, the wireless circuit 2004 performs processing such as down-conversion and demodulation on the signal received via the antenna 231 according to a wireless communication method predetermined in the first network 12, and outputs the processed signal to the processor 2003. To do. The wireless circuit 2004 realizes the function of the communication unit 230.

The wireless circuit 2005 performs processing such as modulation and up-conversion on the signal output from the processor 2003 according to a wireless communication method predetermined in the second network 13, and transfers the processed signal to space via the antenna 241. Radiate. Further, the wireless circuit 2005 performs processing such as down-conversion and demodulation on the signal received via the antenna 241 according to a wireless communication method predetermined in the second network 13, and outputs the processed signal to the processor 2003. To do. The wireless circuit 2005 realizes the function of the communication unit 240.

The memory 2002 is, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), an SSD (Solid State Drive), or the like, and for example, a program or data for realizing each function of the first communication device 20. Stored. The processor 2003 is a CPU (Central Processing Unit), a DSP (Digital Signal Processor), etc., and by executing a program read from the memory 2002, for example, each function of the division unit 221 and the distribution unit 222, and the management unit 223 is executed. To realize.

Although the computer 2000 illustrated in FIG. 17 is provided with one antenna 231 and one antenna 241 each, two or

more antennas

231 and 241 may be provided respectively. Further, the antenna 231 and the antenna 241 may be realized by one common antenna.

Further, all the programs, data, etc. in the memory 2002 do not necessarily have to be stored in the memory 2002 from the beginning. For example, a program, data, or the like is stored in a portable recording medium such as a memory card inserted into the first communication device 20, and the processor 2003 acquires the program, data, or the like from such a portable recording medium and executes the program or data. You may do so. Further, the processor 2003 acquires and executes the program or the like from another computer or server device that stores the program or data via a wireless communication line, a public line, the Internet, a LAN, a WAN, or the like. May be good.

FIG. 18 is a hardware configuration diagram showing an example of a computer 3000 that realizes the function of the second communication device 30. The computer 3000 includes a wireless circuit 3001, a memory 3002, a processor 3003, and a wireless circuit 3004.

The wireless circuit 3001 performs processing such as modulation and up-conversion on the signal output from the processor 3003 according to a wireless communication method predetermined in the second network 13, and transfers the processed signal to space via the antenna 301. Radiate. Further, the wireless circuit 3001 performs processing such as down-conversion and demodulation on the signal received via the antenna 301 according to a wireless communication method predetermined in the second network 13, and outputs the processed signal to the processor 3003. To do. The wireless circuit 3001 realizes the function of the communication unit 300.

The wireless circuit 3004 performs processing such as modulation and up-conversion on the signal output from the processor 3003 according to a wireless communication method predetermined in the first network 12, and transfers the processed signal to space via the antenna 321. Radiate. Further, the wireless circuit 3004 performs processing such as down-conversion and demodulation on the signal received via the antenna 321 according to a wireless communication method predetermined in the first network 12, and outputs the processed signal to the processor 3003. To do. The wireless circuit 3004 realizes the function of the communication unit 320.

The memory 3002 is, for example, a RAM, a ROM, an SSD, or the like, and for example, a program, data, or the like for realizing each function of the second communication device 30 is stored. The processor 3003 is a CPU, a DSP, or the like, and realizes, for example, the function of the management unit 331 by executing the program read from the memory 3002.

Although the computer 3000 illustrated in FIG. 18 is provided with one antenna 301 and one antenna 321 each, two or

more antennas

301 and 321 may be provided respectively. Further, the antenna 301 and the antenna 321 may be realized by one common antenna.

Further, all the programs, data, etc. in the memory 3002 do not necessarily have to be stored in the memory 3002 from the beginning. For example, a program, data, or the like is stored in a portable recording medium such as a memory card inserted into the second communication device 30, and the processor 3003 acquires the program, data, or the like from such a portable recording medium and executes the program or data. You may do so. Further, the processor 3003 acquires and executes the program or the like from another computer or server device that stores the program or data via a wireless communication line, a public line, the Internet, a LAN, a WAN, or the like. May be good.

FIG. 19 is a hardware configuration diagram showing an example of a computer 4000 that realizes the function of the server 40. The computer 4000 has an interface circuit 4001, a memory 4002, and a processor 4003.

The interface circuit 4001 is an interface for performing wired communication with the third network 15. The interface circuit 4001 realizes the function of the communication unit 400.

The memory 4002 is, for example, a RAM, a ROM, an SSD, an HDD (Hard Disk Drive), or the like, and for example, a program or data for realizing each function of the server 40 is stored. The processor 4003 is a CPU, a DSP, or the like, and realizes, for example, the function of the management unit 421 by executing the program read from the memory 4002.

Further, all the programs, data, etc. in the memory 4002 do not necessarily have to be stored in the memory 4002 from the beginning. For example, a program, data, or the like is stored in a portable recording medium such as a memory card inserted in the server 40, and the processor 4003 acquires the program, data, or the like from such a portable recording medium and executes the program or data. Good. Further, the processor 4003 acquires and executes the program or the like from another computer or server device that stores the program or data via a wireless communication line, a public line, the Internet, a LAN, a WAN, or the like. May be good.

The embodiment has been described above. As described above, the first communication device 20 in the present embodiment includes a division unit 221, a communication unit 230, a communication unit 240, and a distribution unit 222. The division unit 221 divides the data output from the camera 10 into a plurality of division data. The communication unit 230 communicates with the server 40 via the first network 12. The communication unit 240 communicates with each of the plurality of second communication devices 30 communicating with the server 40 via the first network 12 via the second network 13. The distribution unit 222 distributes a plurality of divided data to each of the communication unit 230 and the plurality of second communication devices 30 according to the communication performance of each of the communication unit 230 and the plurality of second communication devices 30. As a result, the data output from the camera 10 can be transferred to the server 40 at high speed.

Further, in the above-described embodiment, the communication performance includes the communication performance that changes according to the communication environment. As a result, the divided data can be distributed according to the communication environment, and the data output from the camera 10 can be transferred to the server 40 at high speed.

Further, in the above-described embodiment, the first communication device 20 includes a data storage unit 211 that stores data output from the camera 10. The division unit 221 divides the data when the amount of data stored in the data storage unit 211 becomes equal to or greater than a predetermined first threshold value. As a result, it is possible to prevent the processing required for the transfer of the divided data from increasing with respect to the amount of data to be transferred due to the data size of the divided data becoming too small.

Further, in the above-described embodiment, the division unit 221 has a data size of divided data distributed to devices having higher communication performance according to the communication performance of the respective devices of the communication unit 230 and the plurality of second communication devices 30. Divide the received data so that The distribution unit 222 distributes the divided data divided according to the communication performance to each of the communication unit 230 and the plurality of second communication devices 30. As a result, the data output from the camera 10 can be transferred to the server 40 at high speed.

Further, in the above-described embodiment, the communication unit 240 receives a transmission completion notification indicating that the transmission of the divided data is successful from the second communication device 30. The division unit 221 divides the divided data having a data size according to the communication performance of the second communication device 30 that has transmitted the transmission completion notification from the data. The distribution unit 222 distributes the divided data divided by the division unit 221 to the second communication device 30 that has transmitted the transmission completion notification via the communication unit 240. As a result, the divided data can be distributed to the devices whose transmission is completed earlier according to the actual communication speed.

Further, in the above-described embodiment, the division unit 221 distributes to the device in which the abnormality has occurred when an abnormality occurs in communication via any of the devices in the communication unit 230 and the plurality of second communication devices 30. The divided data that has been created is redistributed to the equipment in which no abnormality has occurred. As a result, the data output from the camera 10 can be more reliably transferred to the server 40.

Further, in the above-described embodiment, the division unit 221 distributes to the device in which the abnormality has occurred when an abnormality occurs in communication via any of the devices in the communication unit 230 and the plurality of second communication devices 30. The divided data that has been divided is subdivided. For example, the division unit 221 subdivides the divided data distributed to the device in which the abnormality has occurred into a data size according to the communication performance of the device in which the abnormality has not occurred. The distribution unit 222 redistributes the subdivided divided data to the communication unit 230 or the second communication device 30 in which no abnormality has occurred. As a result, when the divided data distributed to the device in which the abnormality has occurred is redistributed to other devices, it is suppressed that the divided data having a data size exceeding the communication performance is distributed.

[Other]
The technique disclosed in the present application is not limited to the above-described embodiment, and many modifications can be made within the scope of the gist thereof.

For example, in the above embodiment, the data output from the camera 10 is divided into divided data having a data size according to the communication performance of each device of the communication unit 230 and the plurality of second communication devices 30. The disclosed technology is not limited to this. As another form, for example, as shown in FIG. 20, the division unit 221 may divide the received data D into divided data having a predetermined data size (for example, several MB). FIG. 20 is a diagram showing another example of the data division method. Then, the distribution unit 222 may determine the number of divided data to be distributed to each of the first communication device 20 and the plurality of second communication devices 30 according to the evaluation result of the communication performance. In this case, the distribution unit 222 determines the number of the divided data so that a large amount of the divided data is distributed to the device having a high evaluation result of the communication performance. Even in this way, the data output from the camera 10 can be transferred to the server 40 at high speed.

Further, in this case, when an abnormality occurs in communication via any device of the communication unit 230 and the plurality of second communication devices 30, an abnormality occurs in the divided data distributed to the device in which the abnormality has occurred. It is redistributed so that the number of divided data is divided according to the communication performance of the devices that have not been used. As a result, when the divided data distributed to the device in which the abnormality has occurred is redistributed to other devices, it is suppressed that the divided data having a data size exceeding the communication performance is distributed.

Further, in the above-described embodiment, when the distribution unit 222 receives the transmission completion notification including the information indicating that the transmission is successful, the distribution unit 222 distributes the new divided data to the device of the transmission source of the transmission completion notification. However, the disclosed technology is not limited to this. For example, the distribution unit 222 distributes new divided data to each of the communication unit 230 and the plurality of second communication devices 30 without waiting for a request from each of the communication unit 230 and the plurality of second communication devices 30. You may try to do so. As a result, when the remaining amount of the memory of the first communication device 20 is low, the divided data can be distributed to each device even if the transmission of the divided data is not completed in each device. The remaining amount of memory of the communication device 20 of 1 can be increased. Further, since the divided data can be distributed to each device during the period when the processor usage rate is low, the processing load of the first communication device 20 can be leveled. Further, since the divided data can be distributed to each of the second communication devices 30 during the period when the traffic of the second network 13 is low, the occurrence of congestion of the second network 13 can be reduced.

Further, in the above-described embodiment, the data output from the camera 10 is divided into divided data having a data size according to the communication performance of the respective devices of the communication unit 230 and the plurality of second communication devices 30, and each of them is divided. It is distributed to the equipment, but the disclosed technology is not limited to this. As another form, the dividing unit 221 divides the received data into divided data having a predetermined data size, and the communication unit 230 and the plurality of second communication devices 30 are used regardless of the communication performance of each device. The divided data may be distributed one by one to each of the above. Even in this case, in the device having high communication performance, the transmission of the divided data is completed in a short time, and the new divided data is distributed. As a result, a device having high communication performance can transmit more divided data than a device having low communication performance. Therefore, the data output from the camera 10 can be transferred to the server 40 at high speed.

Further, in the above-described embodiment, when the data amount of the received data becomes the threshold Th1 or more, the received data has been received according to the communication performance of each device of the communication unit 230 and the plurality of second communication devices 30. The data is divided and distributed to each device. However, the disclosed technology is not limited to this. For example, if the data amount of the received data is the threshold Th2 or more, the divided data of the data size according to the communication performance of the device capable of transmitting the divided data is divided from the received data and distributed to the device. You may. For example, the device that has transmitted the transmission completion notification including the information indicating that the transmission has been successful is a device that can transmit the divided data. Further, when there are a plurality of devices capable of transmitting the divided data, the divided data to be distributed to the devices having high communication performance may be preferentially divided and distributed from the received data.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is also clear from the claims that the form with such modifications or improvements may also be included in the technical scope of the invention.

The following configurations also belong to the technical scope of the present disclosure.
(1)
A partition unit that divides the data output from the data output device into multiple partition data,
A first communication unit that communicates with the data storage device via the first network,
Each of the plurality of transfer devices that communicate with the data storage device via the first network, and a second communication unit that communicates with the data storage device via the second network.
Information including the first communication unit and a distribution unit that distributes the plurality of divided data to each of the first communication unit and the plurality of transfer devices according to the communication performance of each of the first communication unit and the plurality of transfer devices. Processing equipment.
(2)
The information processing device according to (1) above, wherein the communication performance includes a communication performance that changes according to a communication environment.
(3)
A storage unit for storing the data output from the data output device is provided.
The divided portion is
The information processing apparatus according to (1) or (2) above, which divides the data when the amount of the data stored in the storage unit becomes equal to or more than a predetermined first threshold value.
(4)
The divided portion is
According to the communication performance of each device of the first communication unit and the plurality of transfer devices, the data is divided so that the data size becomes larger as the divided data is distributed to the devices having higher communication performance.
The distribution unit
The information processing device according to any one of (1) to (3), wherein the divided data divided according to the communication performance is distributed to each of the first communication unit and the plurality of transfer devices.
(5)
The divided portion is
The data is divided into a plurality of the divided data having a predetermined data size, and the data is divided into a plurality of the divided data.
The distribution unit
According to the communication performance of each device of the first communication unit and the plurality of transfer devices, the device having higher communication performance distributes a larger amount of the divided data to any one of (1) to (3). The information processing device described.
(6)
The distribution unit
From (1), which distributes the new divided data to each of the first communication unit and the plurality of transfer devices without waiting for a request from each of the first communication unit and the plurality of transfer devices. The information processing apparatus according to any one of (5).
(7)
The second communication unit is
A transmission completion notification indicating that the transmission of the divided data is completed is received from the transfer device, and the transmission is completed.
The divided portion is
The divided data of the data size according to the communication performance of the transfer device that transmitted the transmission completion notification is divided from the data, and the data is divided.
The distribution unit
The information processing device according to (1) or (2), wherein the divided data divided by the dividing unit is distributed to the transfer device that has transmitted the transmission completion notification via the second communication unit.
(8)
A storage unit for storing the data output from the data output device is provided.
The divided portion is
When the second communication unit receives the transmission completion notification indicating that the transmission of the divided data is successful, the amount of the data stored in the storage unit is equal to or higher than a predetermined second threshold value. If there is, the information processing device according to (7) above, which divides divided data having a data size according to the communication performance of the transfer device that has transmitted the transmission completion notification from the data.
(9)
The distribution unit
When an abnormality occurs in communication via any of the first communication unit and the plurality of transfer devices, the divided data distributed to the first communication unit or the transfer device in which the abnormality has occurred is transferred to the divided data. The information processing device according to any one of (1) to (8), which is redistributed to the first communication unit or the transfer device in which no abnormality has occurred.
(10)
The divided portion is
When an abnormality occurs in communication via any of the first communication unit and the plurality of transfer devices, the data of the divided data distributed to the first communication unit or the transfer device in which the abnormality has occurred. The size is subdivided into data sizes according to the communication performance of the first communication unit or the transfer device in which no abnormality has occurred.
The distribution unit
The information processing device according to (9), wherein the subdivided data is redistributed to the first communication unit or the transfer device in which no abnormality has occurred.
(11)
The divided portion is
The data is divided into the divided data having a predetermined data size, and the data is divided into the divided data.
The distribution unit
According to the communication performance of the first communication unit and the plurality of transfer devices, the higher the communication performance is, the more the divided data is distributed, and the first communication unit and the plurality of transfer devices are distributed. When an abnormality occurs in the communication via any of the above, the divided data distributed to the first communication unit or the transfer device in which the abnormality has occurred is transferred to the first communication unit or the first communication unit in which the abnormality has not occurred. The information processing device according to (9) above, which redistributes the divided data in a number corresponding to the communication performance of the transfer device.
(12)
Information processing device
Dividing the data output from the data output device into multiple divided data and
A first communication unit provided in the information processing device that communicates with the data storage device via the first network, and a plurality of transfer devices that communicate with the information processing device via the second network. The plurality of divided data are distributed to each of the first communication unit and the plurality of transfer devices according to the communication performance of each of the plurality of transfer devices communicating with the data storage device via the first network. An information processing method that executes processing including things.
(13)
For information processing equipment
The process of dividing the data output from the data output device into multiple divided data,
A first communication unit provided in the information processing device that communicates with the data storage device via the first network, and a plurality of transfer devices that communicate with the information processing device via the second network. The plurality of divided data are distributed to each of the first communication unit and the plurality of transfer devices according to the communication performance of each of the plurality of transfer devices communicating with the data storage device via the first network. A program that executes the processing to be performed.

1 Communication system 10 Camera 11 Communication cable 12 First network 13 Second network 14 Base station 15 Third network 20 First communication device 200 Communication unit 210 Storage unit 211 Data storage unit 212 Equipment information table Storage unit 2120 Equipment Information table 213 Distribution table Storage unit 2130 Distribution table 220 Control unit 221 Division unit 222 Distribution unit 223 Management unit 230 Communication unit 231 Antenna 240 Communication unit 241 Antenna 30 Second communication device 300 Communication unit 301 Antenna 310 Storage unit 311 Data storage unit 320 Communication unit 321 Antenna 330 Control unit 331 Management unit 40 Server 400 Communication unit 410 Storage unit 411 Data storage unit 420 Control unit 421 Management unit 2000 Computer 3000 Computer 4000 Computer

Claims

A partition unit that divides the data output from the data output device into multiple partition data,
A first communication unit that communicates with the data storage device via the first network,
Each of the plurality of transfer devices that communicate with the data storage device via the first network, and a second communication unit that communicates with the data storage device via the second network.
Information including the first communication unit and a distribution unit that distributes the plurality of divided data to each of the first communication unit and the plurality of transfer devices according to the communication performance of each of the first communication unit and the plurality of transfer devices. Processing equipment.
The information processing device according to claim 1, wherein the communication performance includes a communication performance that changes according to a communication environment.
A storage unit for storing the data output from the data output device is provided.
The divided portion is
The information processing apparatus according to claim 1, wherein when the amount of data stored in the storage unit exceeds a predetermined first threshold value, the data is divided.
The divided portion is
According to the communication performance of each device of the first communication unit and the plurality of transfer devices, the data is divided so that the data size becomes larger as the divided data is distributed to the devices having higher communication performance.
The distribution unit
The information processing device according to claim 1, wherein the divided data divided according to the communication performance is distributed to each of the first communication unit and the plurality of transfer devices.
The divided portion is
The data is divided into a plurality of the divided data having a predetermined data size, and the data is divided into a plurality of the divided data.
The distribution unit
The information processing device according to claim 1, wherein a larger amount of the divided data is distributed to the device having higher communication performance according to the communication performance of each device of the first communication unit and the plurality of transfer devices.
The distribution unit
The first aspect of claim 1, wherein the new divided data is distributed to each of the first communication unit and the plurality of transfer devices without waiting for a request from each of the first communication unit and the plurality of transfer devices. Information processing equipment.
The second communication unit is
Upon receiving the transmission completion notification indicating that the transmission of the divided data was successful, the transfer device receives the transmission completion notification.
The divided portion is
The divided data of the data size according to the communication performance of the transfer device that transmitted the transmission completion notification is divided from the data, and the data is divided.
The distribution unit
The information processing device according to claim 1, wherein the divided data divided by the dividing unit is distributed to the transfer device that has transmitted the transmission completion notification via the second communication unit.
A storage unit for storing the data output from the data output device is provided.
The divided portion is
When the second communication unit receives the transmission completion notification indicating that the transmission of the divided data is successful, the amount of the data stored in the storage unit is equal to or higher than a predetermined second threshold value. If there is, the information processing device according to claim 7, wherein the divided data having a data size corresponding to the communication performance of the transfer device that transmitted the transmission completion notification is divided from the data.
The distribution unit
When an abnormality occurs in communication via any of the first communication unit and the plurality of transfer devices, the divided data distributed to the first communication unit or the transfer device in which the abnormality has occurred is transferred to the divided data. The information processing device according to claim 1, wherein the information processing device is redistributed to the first communication unit or the transfer device in which no abnormality has occurred.
The divided portion is
When an abnormality occurs in communication via any of the first communication unit and the plurality of transfer devices, the divided data distributed to the first communication unit or the transfer device in which the abnormality has occurred is divided into data. The data size is subdivided according to the communication performance of the first communication unit or the transfer device in which no abnormality has occurred.
The distribution unit
The information processing device according to claim 9, wherein the subdivided data is redistributed to the first communication unit or the transfer device in which no abnormality has occurred.
The divided portion is
The data is divided into the divided data having a predetermined data size, and the data is divided into the divided data.
The distribution unit
According to the communication performance of the first communication unit and the plurality of transfer devices, the higher the communication performance is, the more the divided data is distributed, and the first communication unit and the plurality of transfer devices are distributed. When an abnormality occurs in the communication via any of the above, the divided data distributed to the first communication unit or the transfer device in which the abnormality has occurred is transferred to the first communication unit or the first communication unit in which the abnormality has not occurred. The information processing device according to claim 9, wherein the information processing device redistributes the divided data in a number corresponding to the communication performance of the transfer device.
Information processing device
Dividing the data output from the data output device into multiple divided data and
A first communication unit provided in the information processing device that communicates with the data storage device via the first network, and a plurality of transfer devices that communicate with the information processing device via the second network. The plurality of divided data are distributed to each of the first communication unit and the plurality of transfer devices according to the communication performance of each of the plurality of transfer devices communicating with the data storage device via the first network. An information processing method that executes processing including things.
For information processing equipment
The process of dividing the data output from the data output device into multiple divided data,
A first communication unit provided in the information processing device that communicates with the data storage device via the first network, and a plurality of transfer devices that communicate with the information processing device via the second network. The plurality of divided data are distributed to each of the first communication unit and the plurality of transfer devices according to the communication performance of each of the plurality of transfer devices communicating with the data storage device via the first network. A program that executes processing.