JP2017182576A - Communication system, server apparatus, device apparatus and server load distribution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent instantaneous load concentration on a server and increase the permitted number of accesses of a device.SOLUTION: A communication system is configured by using a device group which periodically transmits transmission cycle set information indicating a prescribed cycle and required data as transmission data to a server at a predetermined cycle and a server which successively accumulates the transmission data that is transmitted from each device. Upon receiving the transmission data that is transmitted from each device, the server acquires the transmission cycle set information and assumes the estimated next reception time of the device on the basis of the received time of the transmission data and the transmission cycle set information. Furthermore, if the assumed estimated reception time is the same as the estimated next reception time of other devices, the server notifies any of relevant devices of an instruction for setting an adjustment value to be added to the transmission cycle set information retained by that device, and the device having received the instruction for setting the adjustment value from the server transmits next transmission data at the timing when the adjustment value is added to the transmission cycle set information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication system including a server device and a large number of device devices that access the server device via a packet switching network.

  Many communication systems (computer systems) have a mechanism in which data is periodically transmitted from a large number of devices to a server, and the server collects data.

  Such a mechanism is described in Patent Document 1 or 2, for example.

  The communication system described in Patent Literature 1 includes a plurality of terminals and servers, and sets and stores operation timings for communicating (connecting) with the servers in each terminal, and each terminal and server are stored in each terminal. Necessary data is exchanged based on the communication timing. In addition, a mechanism is also disclosed in which the server sets operation timing related to the terminal to each terminal via the network while connected to the terminal. The communication system of this document is used to collect data from a terminal connected to a water meter and a gas meter using a mobile communication system (PHS (Personal Handy-phone System) system). Further, Patent Document 1 intends to extend the operating time of each terminal (power saving by stopping the communication function), but the line utilization rate is low due to the line switching system.

  On the other hand, Patent Document 2 discloses a communication system having a system configuration of a packet communication method for downloading correction software to a mobile communication terminal. This communication system is a communication system composed of many terminals and a distribution server, and discloses a mechanism for preventing each user from simultaneously updating (updating) terminals. Specifically, when the distribution server notifies each terminal of a notification that informs the user whether or not each terminal is updated, an icon that determines the display timing of an icon (update notification icon) that notifies the user of the occurrence of the update. The startup time is managed for each terminal. Each terminal displays an update notification icon at the notified icon activation time to prompt the user to update. By distributing the icon display timing for each user, as a result, the time period during which each user updates his / her terminal is dispersed. However, whether or not the update timing is actually dispersed depends on the update operation of each user.

JP 2000-134144 A JP 2007-310659 A

  Patent Document 1 is suitable for managing data having a long transmission interval such as data transmitted from a water meter or a gas meter, but considers a system that periodically transmits data at short time intervals. Absent. For this reason, Patent Document 1 does not consider a problem in the case where a large amount of data from a large number of terminals are transmitted simultaneously.

  Patent Document 2 only discloses a method for providing correction software to the terminal from the server side, and does not describe problems or the like when data is simultaneously transmitted from a plurality of terminals to the server side.

  Recently, communication systems such as M2M (Machine to Machine) and IoT (Internet of Things) that process data from a large number of devices such as cameras and sensors by a server or the like are attracting attention. In such a communication system, it is considered that the server is required to process data from many devices without omission.

  There is a concern that the more devices such as cameras and sensors, the more data from the devices are transmitted to the server at the same time.

  On the other hand, servers often do not necessarily need to process data from various devices in real time. On the other hand, the data from the device may be used almost in real time by the server for monitoring and searching periodically and periodically.

  In such a communication system, it is considered necessary to take measures so that transmission timings of a large number of devices do not overlap as much as possible.

  If the number of devices placed under server management is further increased, the number of devices accessing the server at the same time will increase sequentially even if the timing at which each device transmits the required data is adjusted by operating the setting information. As a result, it is necessary to increase the server allowable processing capacity (communication amount, recording, calculation, etc.). If this countermeasure is neglected, data loss occurs when the server allowable processing capacity is exceeded.

  For this reason, in order to allow the number of simultaneous accesses of further devices, a mechanism for fundamentally suppressing such an instantaneous load on the server by adjusting the transmission timing of required data of the device group is required.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a communication system configured to prevent instantaneous load concentration on a server and to increase the allowable access number of devices.

  A communication system according to an embodiment of the present invention includes a device group that periodically transmits transmission period setting information indicating the predetermined period and required data to a server as transmission data for each predetermined period, and is transmitted from each device. A server that sequentially stores the transmitted data, the server acquires the transmission cycle setting information when receiving the transmission data transmitted from each device, and sets the reception time and transmission cycle of the transmission data. Based on the information, assume the next estimated reception time of the device, and if the assumed reception time is the same as the next estimated reception time of another device, The device that has received an instruction to set an adjustment value to be added to the transmission cycle setting information held by the device and received the instruction to set the adjustment value from the server, The Seichi when it is time plus the transmission cycle setting information, and transmits the next transmission data.

  In the communication system according to an embodiment of the present invention, before uploading / downloading file data, a device group that transmits at least a start time associated with upload / download to a server and a device group requested by each device A server that accepts upload / download, and when the server receives the spare information transmitted from each device, the server obtains a start time included in the spare information, and the requested upload time of the device Assuming a download time, and if the assumed upload time / download time is the same as the upload time / download time of another device, the scheduled upload held by that device in any of the corresponding devices Add to time / scheduled download time A device that notifies an instruction to set an integer value and receives an instruction to set an adjustment value from the server executes upload / download when the adjustment value is added to the upload time / download time. It is characterized by that.

  The server apparatus according to an embodiment of the present invention provides transmission data transmitted from any of a group of devices that periodically transmit transmission cycle setting information indicating the predetermined cycle and required data as transmission data for each predetermined cycle. When receiving the transmission data, the required data of each transmission data is sequentially accumulated, the transmission cycle setting information is acquired, and the next estimated reception time of the device is obtained based on the reception time of the transmission data and the transmission cycle setting information. If the assumed estimated reception time is the same as the next estimated reception time of another device, the adjustment value to be added to the transmission period setting information held by that device is added to any of the corresponding devices. Is generated, and a command for setting the generated adjustment value is notified to any of the corresponding devices.

  Before uploading / downloading file data, the server device according to an embodiment of the present invention transmits the preliminary information indicating at least the start time associated with the upload / download from any of the device groups that transmit to the server. When the preliminary information is received, the start time included in the preliminary information is acquired, the requested upload time / download time of the device is assumed, and the assumed upload time / download time is determined by other devices. If it is the same time as the upload time / download time, a command to set an adjustment value to be added to the scheduled upload time / scheduled download time held by the device is notified to any of the corresponding devices. To do.

  A device apparatus according to an embodiment of the present invention collects necessary data to be transmitted to a server every predetermined period, and periodically transmits transmission period setting information indicating the predetermined period together with the necessary data as transmission data to the server. And when receiving an instruction to set an adjustment value to be added to transmission cycle setting information from the server, the adjustment value is added to the transmission cycle setting information to manage the predetermined cycle and transmit the next transmission data It is characterized by timing.

  Before uploading / downloading file data, the device apparatus according to an embodiment of the present invention transmits preliminary information indicating at least a scheduled start time associated with the upload / download to the request destination server, and from the server When an instruction for setting an adjustment value to be added to the upload / download scheduled start time is received, the adjustment value is added to the upload / download scheduled start time to measure the timing for executing the upload / download.

  In the server load distribution method according to an embodiment of the present invention, the server receives, from each device group, transmission cycle setting information indicating the predetermined cycle for each predetermined cycle and required data as transmission data. The required data is sequentially accumulated, the transmission cycle setting information of each transmission data is sequentially acquired, and the next estimated reception time of the device is assumed based on the received transmission data reception time and the transmission cycle setting information. If the assumed estimated reception time is the same as the next estimated reception time of another device, an instruction to set an adjustment value to be added to the transmission cycle setting information held by that device is sent to any of the corresponding devices. A command for generating and setting the generated adjustment value is notified to any of the corresponding devices.

  In the server load distribution method according to an embodiment of the present invention, before the server uploads / downloads the file data, the server transmits any of the device groups that transmit the preliminary information indicating at least the start time associated with the upload / download to the server. The preliminary information transmitted from the device is received, the start time included in the preliminary information is acquired, the requested upload time / download time of the device is assumed, and the assumed upload time / download time is If it is the same as the upload time / download time of another device, notify any of the corresponding devices an instruction to set an adjustment value to be added to the scheduled upload time / scheduled download time held by the device. It is characterized by that.

  According to the present invention, it is possible to provide a communication system configured to prevent instantaneous load concentration on a server and to increase the allowable access number of devices.

It is the schematic which shows the communication system 1 of 1st Embodiment. 2 is a functional block diagram showing a configuration of a server 10 of the communication system 1. FIG. 2 is a functional block diagram illustrating a configuration of a device 20 of the communication system 1. FIG. 3 is an explanatory diagram illustrating a relationship among components related to transmission data transmission timing adjustment of each device 20 of the communication system 1. FIG. 3 is an explanatory diagram visually showing a device information table stored in a storage unit 13 of the server 10. FIG. 3 is an example flowchart showing the operation of the server 10. 3 is an example flowchart illustrating the operation of the device 20. It is the schematic which shows the communication system 1 of 2nd Embodiment. It is an example of the flowchart which showed operation | movement of server 10 '. It is the example of a flowchart which showed operation of device 20 '.

  Embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic diagram illustrating a communication system 1 according to an embodiment. As shown in FIG. 1, the communication system 1 includes a server 10 for storing and managing data, and a number of devices 20 (device 1 to device N in the figure). The server 10 and each device 20 can communicate via a network (packet communication). The network configuration is not particularly limited. Communication infrastructures such as Wi-Fi (registered trademark), LAN (Local Area Network), and mobile communication may be used in appropriate combination.

  FIG. 2 is a functional block diagram illustrating the configuration of the server 10 of the communication system 1. The server 10 takes out necessary data from the transmission data notified from each device 20 at each timing and stores and manages it. However, description of this part is omitted. The type and amount of required data are not particularly limited.

  As shown in FIG. 2, the server 10 includes a data reception unit 11, a reception data analysis unit 12, a storage unit 13, a reception time calculation unit 14, a data reception time adjustment unit 15, and a control information transmission unit 16. It comprises. Each component is configured to operate as follows.

  The data receiving unit 11 sequentially receives transmission data from each device 20.

  The reception data analysis unit 12 analyzes the content of the received data and extracts required data and setting information. In this setting information, a cycle set to transmit transmission data to the transmission source device 20 is described. That is, the setting information includes transmission cycle setting information.

  In the storage unit 13, the transmission data group (required data group) of each device 20 and the setting information (transmission cycle setting information) of each device 20 are distinguished and stored. At this time, the contents of the setting information of each device are recorded in the device information table. Although not particularly limited, the server 10 (reception data analysis unit 12) may identify a transmission source device using a device ID (Device Identification) included in a header of transmission data or the like. Instead of the device ID, an IP address (Internet Protocol Address) or other identification code may be used.

  The reception time calculation unit 14 calculates the next data reception time from the reception time of the transmission data from each device 20 and the period of the setting information (transmission period setting information) transmitted by the device 20.

  The data reception time adjustment unit 15 confirms the calculated next data reception time of a certain device 20 and the next estimated reception time of all the remaining devices. Then, if the calculated next reception time is the same as the next estimated reception time of another device, the data reception time adjustment unit 15 sets a transmission cycle held by the device in any of the corresponding devices. A command for setting an adjustment value to be added to the information (control information including the adjustment value) is generated.

  The control information transmission unit 16 transmits the generated control information to one of the corresponding devices. This adjusts the overlapping timing of the transmission times of all devices 20 and the device 20 being processed.

  In conjunction with these configurations, the server 10 sequentially acquires the setting information used by the device 20 from each of them, and is necessary to suppress the concentration of the load based on the setting information notified from each device 20. The device 20 is notified of an adjustment value for adjusting the transmission timing. By notifying this adjustment value, the data transmission timing of each device 20 is changed little by little. As a result, the timing at which the server 10 receives a large amount of data transmitted from a large number of devices 20 is slightly shifted and distributed, and the amount of reception timing load at each time point can be reduced.

  FIG. 3 is a functional block diagram illustrating a configuration of the device 20 of the communication system 1. Each device 20 generates required data of transmission data to be notified at each timing, but the description of this part is omitted.

  As shown in FIG. 3, the device 20 includes a control information reception unit 21, a reception control information analysis unit 22, a storage unit 23, a periodic timer monitoring unit 24, a data collection unit 25, and a data transmission unit 26. It has. Each component is configured to operate as follows.

  The control information receiving unit 21 receives control information (including adjustment values and transmission cycles as necessary) from the server 10.

  The reception control information analysis unit 22 analyzes the received control information, extracts adjustment values and transmission cycles, and registers them in the storage unit 23.

  The storage unit 23 stores and manages input setting information (including adjustment values and transmission cycles).

  The cycle timer monitoring unit 24 manages the transmission timing of the collected data (device transmission data, required data).

  The data collection unit 25 also generates collection data (required data) to be transmitted to the server 10 in parallel with the processing operations of the above components. The data collection unit 25 may operate according to the specified timing.

  The cycle timer monitoring unit 24 adjusts the transmission timing of the collected data (device transmission data, required data).

  The data transmission unit 26 transmits the collected data and setting information to the server 10 in association with each other.

  The setting information input unit 27 receives input of setting information from the outside (user or other device) and registers it in the storage unit 23. The control information is registered from the server 10 via the control information receiving unit 21.

  When these configurations are linked, each device 20 receives the control value including the adjustment value from the server 10, acquires the adjustment value from the server 10 by the reception control information analysis unit 22, and stores the adjustment value in the storage unit 23. Then, each device 20 transmits the next transmission data using the periodic timer monitoring unit 24 according to the registered setting information. Each device 20 transmits the next transmission data according to the setting information registered in the periodic timer monitoring unit 24 when the control information including the adjustment value is not received from the server 10.

  FIG. 4 is an explanatory diagram showing the relationship of each component related to transmission data transmission timing adjustment of each device 20 of the communication system 1.

  Each device 20 refers to the setting information and periodically transmits necessary data to the server 10 at intervals defined by the transmission cycle setting information. At this time, each device 20 transmits setting information (at least transmission cycle setting information) together with required data to the server 10 as transmission data. This setting information is assumed to be set by the user of each device 20 and the service vendor used by the user.

  The server 10 acquires transmission cycle setting information of each device 20 from each reception data received by the data reception unit 11. Then, the server 10 refers to the time when the reception data is received from each device 20 in the reception time calculation unit 14, estimates the time when the transmission data arrives from the device, and sets the estimated data transmission time in the device management table. Record.

  Next, in the data reception time adjustment unit 15, the server 10 refers to the estimated data transmission time of the other device 20 described in the table (described when receiving transmission data of the other device 20 as in the above method). Then, it searches for another device 20 that transmits data at the same time.

  When there is a device that transmits data at the same time, the server 10 sends control information (adjustment value) for instructing the corresponding device 20 to finely adjust the next transmission time via the control information transmission unit 16. To send.

  In the device 20, when the control information is received by the control information receiving unit 21, the received information analysis unit 22 acquires the content (adjustment value) of the control information and registers it in the setting information.

  In this way, the device 20 that has received a command for setting a data transmission timing change instruction (adjustment value) from the server 10 finely adjusts the timing of the next data transmission determined by the data transmission period registered in the control information. To do.

  As a result, by adjusting the transmission time of required data of some devices 20 according to an instruction from the server 10, the time at which the server 10 receives data is adjusted so as not to overlap. As a result, local concentration of communication of each device 20 on the server 10 is autonomously reduced.

  FIG. 5 is an explanatory diagram visibly showing a device information table stored in the storage unit 13 of the server 10.

The server 10 registers the periodic interval, the reception time, and the calculated next data reception time in the device information table from the device ID for identifying each device 20 and the setting information received from the device 20. At this time, an adjustment value is assigned when a value in which the estimated next reception time in the figure overlaps is calculated. The registration of the device information table is updated together with the storage of required data every time data is received from each device 20.
This mechanism autonomously prevents the occurrence of an instantaneous load on the server 10.

  Next, an example of an operation flowchart of each device that realizes the method of adjusting the data transmission timing of the access device by the server 10 will be described with reference to FIGS.

  FIG. 6 is a flowchart illustrating the operation of the server 10.

  When the server 10 receives the transmission data from each device (S101), the server 10 acquires the device ID, the reception time, and the transmission cycle setting information of the device from the received control information and stores them in the device information table (S102). Next, the server 10 calculates the predicted next reception time from the reception time and the transmission cycle setting information (S103). Next, the server 10 refers to the device information table and checks whether there is a device that transmits data at the same time (S104). If there is a device that transmits data at the same time (YES in S105), the server 10 calculates an adjustment value of the cycle time set for the device 20 (S106). Finally, the server 10 transmits the determined adjustment value as control information to the device 20 that adjusts the transmission cycle (S107).

  FIG. 7 is a flowchart illustrating the operation of the device 20.

  When the data transmission time comes according to the setting information (S201), the device 20 confirms the presence or absence of an adjustment value corresponding to the transmission (S202) before transmitting the transmission data (required data). Next, the device 20 associates the collected or generated transmission data (required data) with the setting information including the transmission cycle, and transmits it to the server 10 (S203). In addition, the device 20 constantly monitors whether setting information including an adjustment value is received from the server 10 (S204). If control information is received from the server 10 (if the control information includes an adjustment value), the next transmission time is adjusted (S205). At this time, the server 10 does not change the transmission cycle, deletes the adjustment value after the transmission of the next transmission data, and continues data transmission according to the original transmission cycle. When setting information including a transmission cycle is received as control information from the server 10 or another device, the device 20 updates the setting information and operates in the future using the transmission cycle.

Here, an example of adjusting the data reception time is shown. If the next reception times of the device 20-1 and the device 20-2 overlap, the server 10 (data reception time adjustment unit 15) changes the next reception time of the device 20-2. Since the reception times of the device 20-2 and the device 20-3 overlap as a result of the change, the reception time of the device 20-3 is further changed. The difference from the original transmission time is stored as an adjustment value in the device information table for a predetermined period.

_______________________
Data transmission time adjustment example 1:
Device 20-1 Next reception time A
Device 20-2 Next reception time A ⇒ A '
Device 20-3 Next reception time C
Device 20-4 Next reception time D
...
* The next reception times of the device device 20-1 and the device 20-2 overlap.
⇒ Adjust the reception time of device 20-2 to A '
_______________________

_______________________
Data transmission time adjustment example 2:
Device 20-1 Next reception time A
Device 20-2 Next reception time A ⇒ A '
Device 20-3 Next reception time A'⇒ A ''
Device 20-4 Next reception time D
...
* The next reception times of the device device 20-1 and the device 20-2 overlap.
⇒ Adjust the reception time of device 20-2 to A '
⇒ Device device 20-2 The next reception time of device 20-3 overlaps.
⇒ Adjust the reception time of device 20-3 to A ''
_______________________

  As described above, in the communication system 1, each device 20 can dynamically adjust the data transmission timing dynamically by the cooperation of the server 10 and each device 20. This suppresses the concentration of transmissions of the devices 20 with respect to the server 10 at the same time. For this reason, instantaneous load concentration of the server 10 can be prevented, and as a result, the number of devices under management can be increased at the same time. In addition, the information processing that is additionally performed by the present invention in each apparatus requires a very low amount of computation. For this reason, it becomes realizable, without affecting the substantial capability of the server 10 or the device 20.

  Next, another embodiment will be described.

[Second Embodiment]
FIG. 8 is a schematic diagram illustrating the communication system 2 according to the second embodiment. The difference between the communication system 2 of the second embodiment and the first embodiment is that the first embodiment is an operation in which each device periodically transmits data, whereas the second embodiment This is an operation in which each device irregularly transmits and receives data (upload / download).

  The server 10 ′ and the device 20 ′ can be constructed with the same configuration as the server 10 and the device 20 of the first embodiment. On the other hand, the server 10 ′ and the device 20 ′ notify the scheduled upload / download execution time before actual file download / download. When executing the load adjustment process, the server 10 'notifies the device 20' of an instruction for setting an adjustment value to be added to the scheduled upload time / scheduled download time. In the following description, it will be described that the server 10 ′ corresponds to a protocol such as FTP and HTTP, and each device 20 ′ downloads files from the server 10 ′ irregularly.

  FIG. 9 is a flowchart illustrating the operation of the server 10 '.

  When the server 10 'receives the scheduled download execution time from the arbitrary device 20' as preliminary information (S301), the server 10 'stores the device ID for identifying the device 20' and the scheduled download time in the device information table (S302).

  Next, the server 10 'calculates a predicted execution time from the reception time and the scheduled download time (S303). Note that the server 10 ′ obtains the scheduled download time using the reception time when the scheduled download time is expressed in minutes or the like. On the other hand, when the scheduled download time is expressed as the time itself, the server 10 'obtains the scheduled download time using the received time as it is.

  Next, the server 10 checks whether there is a device that downloads data at the same time with reference to the device information table (S304). If there is a device that downloads data at the same time (YES in S305), the server 10 'calculates an adjustment value for the execution time set in the corresponding device 20' (S306). Finally, the server 10 'transmits control information (adjustment value setting command) including the determined adjustment value to the device 20' that adjusts the execution cycle (S307).

  FIG. 10 is a flowchart illustrating the operation of the device 20 '.

  When receiving a download request (S401), the device 20 'checks whether there is an adjustment value set in the download destination (S402) before downloading. By providing this confirmation step, there is no restriction on the operation of the device 20 'for other servers. On the other hand, when the device 20 ′ has already received the adjustment value from the download destination (server 10 ′), the device 20 ′ operates according to the adjustment value.

  Next, the device 20 'transmits preliminary information indicating the download execution time to the server 10' (S403). Next, the device 20 ′ determines whether or not the setting information including the adjustment value is received from the server 10 ′ (S404), and if the control information including the adjustment value is received from the server 10 ′, the download execution time is set. After the adjustment, download is executed (S405). On the other hand, the device 20 ′ determines whether or not the setting information including the adjustment value is received from the server 10 ′ (S404). If the device 20 ′ does not receive the adjustment value from the server 10 ′, the device 20 ′ downloads without adjusting the download execution time. Execute (S405).

  By providing the configuration described in this embodiment, the communication system can be configured to prevent the instantaneous load concentration on the server and increase the allowable access number of the device with respect to the download. The same applies to uploading, and it is only necessary to provide a configuration in which preliminary information including scheduled upload items is received from the device in advance and the scheduled execution time is adjusted with an adjustment value as necessary. Thus, the communication system can be configured to prevent the instantaneous load concentration on the server for uploading and to increase the allowable access number of the device.

  The first embodiment and the second embodiment can be appropriately combined and operated, and the combined communication system prevents instantaneous load concentration on the server for periodic communication and irregular communication. Thus, it is possible to increase the allowable access number of the device. It is desirable that the adjustment value be managed separately for uploading, downloading, and periodic communication.

  Further, in the above description, the data reception time adjustment unit 15 of the first embodiment performs the load of the data transmission time by generating the adjustment value when a predetermined amount of estimated processing load / estimated simultaneous access number / band capacity is exceeded. An adjustment process may be performed. In this case, the load adjustment process at the data transmission time by generating the adjustment value may be stopped when a predetermined amount of estimated processing load / estimated simultaneous access number / band power is below. At this time, the predetermined amount of estimated processing load and the predetermined amount of estimated simultaneous access may be set corresponding to the server capability. Further, the predetermined amount of bandwidth capacity may be set corresponding to the upper and lower bandwidths that can be used by the server.

  In the second embodiment, the description of the corresponding component part is omitted, but it may be determined whether or not to execute the load adjustment process also at the time of upload / download. In other words, for a small number of simultaneous accesses, the operation is performed in the same manner as before without using an adjustment value, and the load adjustment process is executed when it is possible to estimate the occurrence of a certain processing load. By constructing the server function in this way, it is possible to obtain a configuration that can further increase the number of managed servers with respect to the server processing capacity.

  Note that each unit of the communication system may be realized by appropriately combining hardware and software. At this time, this program may realize each unit in cooperation with functions provided by software such as an operating system, a microprogram, and a driver, as necessary.

  The program data expanded in the memory appropriately includes an execution instruction group, a code group, a table file, content data, and the like that cause the processor to operate as one or more of the above-described units.

  Further, this program may be recorded non-temporarily on a recording medium and distributed. The program recorded on the recording medium is read into the memory via wired, wireless, or the recording medium itself, and operates a processor or the like.

  In this specification, the recording medium includes storage media, memory devices, storage devices, and the like having similar terms. Examples of this recording medium include an optical disk, a magnetic disk, a semiconductor memory device, a hard disk device, and a tape medium. The recording medium is desirably non-volatile. The recording medium may be a combination of a volatile module (for example, RAM: Random Access Memory) and a nonvolatile module (for example, ROM: Read Only Memory).

  It should be noted that the present invention has been described by exemplifying embodiments. However, the specific configuration of the present invention is not limited to the above-described embodiment, and modifications within a range not departing from the gist of the present invention are included in the present invention. For example, changes such as separation / merging of block configurations and replacement of procedures in the above-described embodiments and / or examples are free as long as they satisfy the gist of the present invention and the functions described, and the above description limits the present invention. is not.

  According to the present invention, it is possible to provide a communication system configured to prevent instantaneous load concentration on a server and to increase the allowable access number of devices.

In addition, a part or all of the above-described embodiments can be described as follows. Note that the following supplementary notes do not limit the present invention.
[Appendix 1]
A server and a plurality of devices that periodically and periodically transmit data to the server, the server overlapping in time between the periodically and periodically transmitted data from the plurality of devices A communication system comprising means for controlling the reception timing from the device so as not to occur.

[Appendix 2]
The means for receiving the data transmitted periodically and periodically and calculating the next reception timing of the data is calculated if the reception timing is the same as the data transmitted periodically and periodically of other devices. A server having means for transmitting the adjusted timing adjustment value included in the control information.

[Appendix 3]
The above additional server including means for receiving data transmitted periodically and periodically from a plurality of devices and storing the next reception timing of each device for each device.

[Appendix 4]
A device comprising means for adjusting the transmission timing of data periodically and periodically transmitted according to control information including a timing adjustment value calculated by a server.

[Appendix 5]
A plurality of devices that periodically transmit the transmission cycle setting information indicating the predetermined cycle and the required data to the server as transmission data for each predetermined cycle;
A server for sequentially storing transmission data transmitted from each device;
Including
When the server receives the transmission data transmitted from each device, the server acquires the transmission cycle setting information, and based on the reception time of the transmission data and the transmission cycle setting information, the next estimated reception time of the device When the assumed estimated reception time is the same as the next estimated reception time of another device, an adjustment value to be added to the transmission cycle setting information held by the device is set to any of the corresponding devices. Notify the command to set,
A device that receives an instruction to set an adjustment value from the server transmits the next transmission data when the adjustment value is added to the transmission cycle setting information.

[Appendix 6]
Before uploading / downloading the file data, a plurality of devices for transmitting preliminary information indicating at least a start time associated with the upload / download to the server;
A server that accepts the upload / download requested from each device;
Including
When the server receives the spare information transmitted from each device, the server acquires the start time included in the spare information, assumes the requested upload time / download time of the device, and assumes the assumption If the upload time / download time is the same as the upload time / download time of another device, set the adjustment value to be added to the scheduled upload time / scheduled download time held by that device to any of the corresponding devices To notify
A communication system, wherein a device that receives an instruction to set an adjustment value from the server executes upload / download when the adjustment value is added to the upload time / download time.

[Appendix 7]
A communication system according to the above-mentioned appendix,
The server generates a predetermined amount of estimated processing load / estimated simultaneous access number / adjustment value added to transmission cycle setting information / adjusted value added to scheduled upload time / adjusted value added to scheduled download time when bandwidth surplus is exceeded. Initiate a load adjustment process for any or a combination of
Either a predetermined amount of estimated processing load / estimated simultaneous access count / adjustment value to be added to transmission cycle setting information / adjustment value to be added to scheduled upload time / adjustment value to be added to scheduled download time A communication system characterized by stopping the load adjustment process of the combination.

[Appendix 8]
When receiving transmission data transmitted from any of a group of devices that periodically transmit the transmission period setting information indicating the predetermined period and the required data as transmission data for each predetermined period,
In addition to accumulating the required data of each transmission data sequentially,
Obtaining the transmission cycle setting information;
Based on the reception time of the transmission data and the transmission cycle setting information, assuming the next estimated reception time of the device,
If the assumed estimated reception time is the same as the next estimated reception time of another device, a command to set an adjustment value to be added to the transmission cycle setting information held by that device in any of the corresponding devices Produces
Notify the command to set the generated adjustment value to any of the corresponding devices,
The server apparatus characterized by the above-mentioned.

[Appendix 9]
Before uploading / downloading file data, when receiving the preliminary information transmitted from any of the device groups that transmit at least the start time associated with the upload / download to the server,
The start time included in the preliminary information is acquired, the requested upload time / download time of the device is assumed, and the assumed upload time / download time is the same as the upload time / download time of other devices. If it is, notify the instruction to set an adjustment value to be added to the scheduled upload time / scheduled download time held by that device to any of the corresponding devices.
The server apparatus characterized by the above-mentioned.

[Appendix 10]
A server device as described in the above supplementary note,
When the server apparatus exceeds a predetermined amount of estimated processing load / estimated simultaneous access number / band capacity, an adjustment value to be added to the transmission cycle setting information / an adjustment value to be added to the scheduled upload time / an adjustment value to be added to the scheduled download time Initiate any or a combination of load balancing processes by generation,
Either a predetermined amount of estimated processing load / estimated simultaneous access count / adjustment value to be added to transmission cycle setting information / adjustment value to be added to scheduled upload time / adjustment value to be added to scheduled download time A server device characterized by stopping the load adjustment process of the combination.

[Appendix 11]
Collecting necessary data to be transmitted to the server every predetermined period, and periodically transmitting transmission period setting information indicating the predetermined period together with the necessary data to the server as transmission data;
When receiving an instruction to set an adjustment value to be added to the transmission cycle setting information from the server, add the adjustment value to the transmission cycle setting information to manage the predetermined cycle and measure the timing of transmitting the next transmission data. A device device.

[Appendix 12]
Before uploading / downloading the file data, sending at least preliminary information indicating the scheduled start time associated with the upload / download to the requested server,
When an instruction for setting an adjustment value to be added to the scheduled upload / download start time is received from the server, the adjustment value is added to the scheduled upload / download start time to measure the timing for executing the upload / download. Device device.

[Appendix 13]
The server
From each device group, the transmission cycle setting information and the required data indicating the predetermined cycle for each predetermined cycle are received as transmission data,
In addition to accumulating the required data of each transmission data sequentially,
Obtain the transmission cycle setting information of each transmission data sequentially,
Based on the received transmission data reception time and transmission cycle setting information, assuming the next estimated reception time of the device,
If the assumed estimated reception time is the same as the next estimated reception time of another device, a command to set an adjustment value to be added to the transmission cycle setting information held by that device in any of the corresponding devices Produces
Notify the command to set the generated adjustment value to any of the corresponding devices,
A server load balancing method.

[Appendix 14]
The server
Before uploading / downloading the file data, receiving the preliminary information transmitted from any of the devices that transmit the preliminary information indicating at least the start time associated with the upload / download to the server,
The start time included in the preliminary information is acquired, the requested upload time / download time of the device is assumed, and the assumed upload time / download time is the same as the upload time / download time of other devices. If it is time, notify any of the corresponding devices an instruction to set an adjustment value to be added to the scheduled upload time / scheduled download time held by the device.
A server load balancing method.

[Appendix 15]
A server load balancing method as described above, wherein
The server generates a predetermined amount of estimated processing load / estimated simultaneous access number / adjustment value added to transmission cycle setting information / adjusted value added to scheduled upload time / adjusted value added to scheduled download time when bandwidth surplus is exceeded. Initiate a load adjustment process for any or a combination of
Either a predetermined amount of estimated processing load / estimated simultaneous access count / adjustment value to be added to transmission cycle setting information / adjustment value to be added to scheduled upload time / adjustment value to be added to scheduled download time A server load distribution method characterized by stopping the load adjustment process of the combination.

1, 2 Communication system 10, 10 'Server 11 Data receiving unit (data receiving means)
12 Received data analysis unit (Received data analysis means)
13 Storage unit (storage means)
14 Reception time calculation unit (reception time calculation means)
15 Data reception time adjustment unit (data reception time adjustment means)
16 Control information transmission part (control information transmission means)
20, 20 'device 21 control information receiving unit (control information receiving means)
22 Reception control information analysis unit (Reception control information analysis means)
23 storage unit (storage means)
24 periodic timer monitoring unit (periodic timer monitoring means)
25 Data collection unit (data collection means)
26 Data transmission unit (data transmission means)

Claims (10)

A plurality of devices that periodically transmit the transmission cycle setting information indicating the predetermined cycle and the required data to the server as transmission data for each predetermined cycle;
A server for sequentially storing transmission data transmitted from each device;
Including
When the server receives the transmission data transmitted from each device, the server acquires the transmission cycle setting information, and based on the reception time of the transmission data and the transmission cycle setting information, the next estimated reception time of the device When the assumed estimated reception time is the same as the next estimated reception time of another device, an adjustment value to be added to the transmission cycle setting information held by the device is set to any of the corresponding devices. Notify the command to set,
A device that receives an instruction to set an adjustment value from the server transmits the next transmission data when the adjustment value is added to the transmission cycle setting information. Before uploading / downloading the file data, a plurality of devices for transmitting preliminary information indicating at least a start time associated with the upload / download to the server;
A server that accepts the upload / download requested from each device;
Including
When the server receives the spare information transmitted from each device, the server acquires the start time included in the spare information, assumes the requested upload time / download time of the device, and assumes the assumption If the upload time / download time is the same as the upload time / download time of another device, set the adjustment value to be added to the scheduled upload time / scheduled download time held by that device to any of the corresponding devices To notify
A communication system, wherein a device that receives an instruction to set an adjustment value from the server executes upload / download when the adjustment value is added to the upload time / download time. A communication system according to claim 1 and / or a communication system according to claim 2,
The server generates a predetermined amount of estimated processing load / estimated simultaneous access number / adjustment value added to transmission cycle setting information / adjusted value added to scheduled upload time / adjusted value added to scheduled download time when bandwidth surplus is exceeded. Initiate a load adjustment process for any or a combination of
Either a predetermined amount of estimated processing load / estimated simultaneous access count / adjustment value to be added to transmission cycle setting information / adjustment value to be added to scheduled upload time / adjustment value to be added to scheduled download time A communication system characterized by stopping the load adjustment process of the combination. When receiving transmission data transmitted from any of a group of devices that periodically transmit the transmission period setting information indicating the predetermined period and the required data as transmission data for each predetermined period,
In addition to accumulating the required data of each transmission data sequentially,
Obtaining the transmission cycle setting information;
Based on the reception time of the transmission data and the transmission cycle setting information, assuming the next estimated reception time of the device,
If the assumed estimated reception time is the same as the next estimated reception time of another device, a command to set an adjustment value to be added to the transmission cycle setting information held by that device in any of the corresponding devices Produces
Notify the command to set the generated adjustment value to any of the corresponding devices,
The server apparatus characterized by the above-mentioned. Before uploading / downloading file data, when receiving the preliminary information transmitted from any of the device groups that transmit at least the start time associated with the upload / download to the server,
The start time included in the preliminary information is acquired, the requested upload time / download time of the device is assumed, and the assumed upload time / download time is the same as the upload time / download time of other devices. If it is, notify the instruction to set an adjustment value to be added to the scheduled upload time / scheduled download time held by that device to any of the corresponding devices.
The server apparatus characterized by the above-mentioned. The server device according to claim 4 and / or the server device according to claim 5,
When the server apparatus exceeds a predetermined amount of estimated processing load / estimated simultaneous access number / band capacity, an adjustment value to be added to the transmission cycle setting information / an adjustment value to be added to the scheduled upload time / an adjustment value to be added to the scheduled download time Initiate any or a combination of load balancing processes by generation,
Either a predetermined amount of estimated processing load / estimated simultaneous access count / adjustment value to be added to transmission cycle setting information / adjustment value to be added to scheduled upload time / adjustment value to be added to scheduled download time A server device characterized by stopping the load adjustment process of the combination. Collecting necessary data to be transmitted to the server every predetermined period, and periodically transmitting transmission period setting information indicating the predetermined period together with the necessary data to the server as transmission data;
When receiving an instruction to set an adjustment value to be added to the transmission cycle setting information from the server, add the adjustment value to the transmission cycle setting information to manage the predetermined cycle and measure the timing of transmitting the next transmission data. A device device. Before uploading / downloading the file data, sending at least preliminary information indicating the scheduled start time associated with the upload / download to the requested server,
When an instruction for setting an adjustment value to be added to the scheduled upload / download start time is received from the server, the adjustment value is added to the scheduled upload / download start time to measure the timing for executing the upload / download. Device device. The server
From each device group, the transmission cycle setting information and the required data indicating the predetermined cycle for each predetermined cycle are received as transmission data,
In addition to accumulating the required data of each transmission data sequentially,
Obtain the transmission cycle setting information of each transmission data sequentially,
Based on the received transmission data reception time and transmission cycle setting information, assuming the next estimated reception time of the device,
If the assumed estimated reception time is the same as the next estimated reception time of another device, a command to set an adjustment value to be added to the transmission cycle setting information held by that device in any of the corresponding devices Produces
Notify the command to set the generated adjustment value to any of the corresponding devices,
A server load balancing method. The server
Before uploading / downloading the file data, receiving the preliminary information transmitted from any of the devices that transmit the preliminary information indicating at least the start time associated with the upload / download to the server,
The start time included in the preliminary information is acquired, the requested upload time / download time of the device is assumed, and the assumed upload time / download time is the same as the upload time / download time of other devices. If it is time, notify any of the corresponding devices an instruction to set an adjustment value to be added to the scheduled upload time / scheduled download time held by the device.
A server load balancing method.

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