JP6395567B2 - Communication system and communication method - Google Patents

Description

  The present invention relates to a technique for connecting a user apparatus to a network using a relay apparatus.

  There is a technique for connecting a user device to a network using a relay device. Japanese Patent Application Laid-Open No. 2004-151867 discloses a gateway that cannot communicate directly with a base station, but has a communication terminal having a wireless LAN (Local Area Network) communication interface, connected to the base station in a cellular manner, and connected to the communication terminal through a wireless LAN. A technique for connecting to a network provided by a base station via a relay device is disclosed.

JP 2012-124603 A

  By the way, when the relay device communicates with the user device, for example, by wireless LAN, the upper limit of the number of user devices that can be connected at the same time (hereinafter referred to as “upper limit of the number of connections”) is determined by the settings and product specifications is there. The upper limit of the number of connections is often increased as the bandwidth of communication performed by the relay device with the network is larger. When comparing a relay device (for example, an access point) connected to a network by wired communication and a relay device (for example, a mobile router) connected to a network by wireless communication, it is common that the bandwidth of wireless communication is smaller than that of wired communication Therefore, the mobile router tends to have a smaller upper limit on the number of connections than the access point.

  Here, for example, in a school, assuming that each class shares user devices for the number of students in one class, there are multiple classrooms to be used. It is desirable to use a connecting relay device. However, in that case, as described above, the upper limit of the number of connections tends to be small, and a plurality of relay devices may be required. In that case, since it is troublesome to set the user device connected to each relay device every time, it is conceivable to use a fixed combination of the relay device and the user device. Then, for example, 10 user devices should be connected to each relay device, but only 5 devices are connected to a certain relay device due to student absence or the like, and the wireless communication bandwidth of the relay device is made effective. It can happen that it cannot be used.

  Therefore, the present invention has an object to effectively use a band of wireless communication performed by each relay device with a network when a user device is connected to the network using a plurality of relay devices connected to the network by wireless communication. .

  In order to achieve the above object, the present invention provides a function of performing first wireless communication with a network having a wireless communication interface, and each of the user devices and second devices up to a first number of user devices. A plurality of first relay devices having a function of performing wireless communication and a function of performing wired communication, and each of the user devices and the first number up to a second number of user devices greater than the first number. A second relay device having a function of performing two wireless communication and a function of performing wired communication, and a third relay device in which the plurality of first relay devices and the second relay device are connected by wire, A third relay device having a function of transmitting data transmitted from the second relay device to the plurality of first relay devices and transmitting the data to the plurality of first relay devices, wherein the second relay device is equal to or less than the second number of users. The second wireless communication from the device Therefore, the transmitted data group is received and transmitted to the third relay device, and the third relay device transmits the data received from the second relay device in a distributed manner to the plurality of first relay devices. A communication system is provided in which each of the plurality of first relay devices transmits data received from the third relay device to a destination of the data via the network.

Further, each of the plurality of first relay devices transmits data transmitted by the second wireless communication from the first number or less of user devices in a non-connected state where the first relay devices are not connected to the third relay device. May be transmitted to the destination of the data by performing the first wireless communication with the network.
Further, each of the plurality of first relay devices is connected to the third relay device by a wire by being attached to a connector connected to the third relay device by a wire, and when the first relay device is detached from the connector, It may be determined that the connection has been disconnected.

Further, the second relay device transmits a radio wave including identification information for identifying its own device, and each of the plurality of first relay devices is in a state of not receiving from a state of receiving the radio wave including the identification information. It may be determined that the disconnection state has occurred.
Further, each of the plurality of first relay devices measures the position of its own device, and when the measured position is not included in the range from the state included in the predetermined range, It may be determined that the connection has been disconnected.

  The present invention also includes a function of performing first wireless communication with a network having a wireless communication interface, and a function of performing second wireless communication with each user device up to a first number of user devices. A plurality of first relay devices having a function of performing wired communication, and a function of performing the second wireless communication with each of the user devices up to a second number of user devices greater than the first number. And a second relay device having a function of performing wired communication, and a third relay device in which the plurality of first relay devices and the second relay device are connected by wire, and transmitted from the second relay device The second relay device of a communication system comprising a third relay device having a function of distributing and transmitting received data to the plurality of first relay devices from the second number or less of user devices. By 2nd wireless communication A first step of receiving the transmitted data group and transmitting it to the third relay device, and the third relay device distributing the data received from the second relay device to the plurality of first relay devices And a third step in which each of the plurality of first relay devices transmits data received from the third relay device to a destination of the data via the network. Provide a method.

  ADVANTAGE OF THE INVENTION According to this invention, when connecting a user apparatus to a network using multiple relay apparatuses connected with a network by radio | wireless communication, the band of the radio | wireless communication which each relay apparatus performs with a network can be utilized effectively.

Diagram showing overall configuration of communication system Diagram showing functional configuration of mobile router Diagram showing functional configuration of access point Diagram showing functional configuration of load balancing router The figure showing the functional composition of user equipment The figure showing an example of the operation | movement procedure which each apparatus of a communication system performs The figure showing the external appearance of the connection apparatus of 2nd Embodiment Diagram showing functional configuration of mobile router Diagram showing overall configuration of communication system The figure showing the functional composition of the mobile router of a modification

[1] First Embodiment FIG. 1 shows an overall configuration of a communication system 1. The communication system 1 is a system for connecting a user device to a network using a relay device. As the user device, a device having a wireless communication function such as a tablet terminal or a notebook computer is used. In the present embodiment, a case will be described in which tablet terminals corresponding to the number of students (for example, 30 students) of one class in a school are used by students as user devices and shared among a plurality of classes. The communication system 1 includes a plurality of mobile routers 10, an access point 20, a load distribution router 30, a plurality of user devices 40, a network 2, and a storage device 4.

  The network 2 is a system that mediates data exchange between devices. The network 2 is a network including a mobile communication network, and has a base station 3 that forms the mobile communication network. The base station 3 serves as an interface for wireless communication (in this case, mobile communication) for the network 2. The network 2 includes the Internet. By connecting the user device 40 to the network 2, it is possible to request information published on the Internet and services provided by a server device connected to the Internet from the user device 40. Provided.

  Communication performed when the user device 40 is connected to the network 2 will be described. Each of the plurality of user devices 40 performs wireless communication (hereinafter referred to as “wireless LAN communication”) based on the wireless LAN standard with the access point 20. The access point 20 is connected to the load distribution router 30 by wire, and performs wired communication with the load distribution router 30. The load distribution router 30 is connected to a plurality of mobile routers 10 by wire, and performs wired communication with each of the plurality of mobile routers 10. The plurality of mobile routers 10 perform mobile communication with the network 2. By performing these communications, the user device 40 connects to the network 2 and exchanges data via the network 2. Mobile communication is an example of the “first wireless communication” in the present invention, and wireless LAN communication is an example of the “second wireless communication” in the present invention.

  The storage device 4 is a device in which a plurality of mobile routers 10, access points 20, and load distribution routers 30 are stored. The storage device 4 has wheels, so that the entire device can be pushed and moved easily between classrooms. The storage device 4 has a user device storage unit 5. The user device storage unit 5 forms a space in which a plurality of user devices 40 (30 tablet terminals in the present embodiment) can be stored, and the user device stored in the space is fixed or a fixed user device. It has a function of charging.

Next, the detailed configuration of each device will be described.
Each of the plurality of mobile routers 10 is a relay device that relays communication between devices connected to its own device, and is an example of the “first relay device” in the present invention.
FIG. 2 shows a functional configuration of the mobile router 10. The mobile router 10 has a mobile communication function 11, a wired communication function 12, and a wireless LAN communication function 13.

  The mobile communication function 11 is a function for performing mobile communication with the network 2. The wired communication function 12 is a function for performing wired communication with a device (in this embodiment, the load distribution router 30) that is connected to the own device through a wired connection. The mobile communication function 11 and the wired communication function 12 exchange data with each other. As a result, the mobile router 10 communicates between a device that communicates using the mobile communication function 11 (base station 3 shown in FIG. 1) and a device that communicates using the wired communication function 12 (load distribution router 30 shown in FIG. 1). Relay communications.

  The wireless LAN communication function 13 is a function for performing wireless LAN communication. The mobile communication function 11 and the wireless LAN communication function 13 exchange data with each other. As a result, the mobile router 10 relays communication between a device (base station 3 shown in FIG. 1) that performs communication using the mobile communication function 11 and a device that performs communication using the wireless LAN communication function 13. The wireless LAN communication function 13 can be switched between valid and invalid according to the setting of the mobile router 10.

  When the wireless LAN communication function 13 is enabled, the wireless LAN communication function 13 periodically transmits a radio wave including, for example, its own device SSID (Service Set Identifier) so that it can be connected to the communication partner, Wireless LAN communication is performed by connecting to a communication device (for example, the user device 40) that has performed connection processing conforming to the standard. On the contrary, when the wireless LAN communication function 13 is disabled, this radio wave is not transmitted and is not connected to other communication devices. In the present embodiment, the wireless LAN communication function 13 is disabled.

  Further, even when the wireless LAN communication function 13 is enabled, an upper limit of the number of communication partners that can be connected simultaneously is determined. This upper limit is hereinafter referred to as “the upper limit of the number of connections”, and in this embodiment, the upper limit of the number of connections is determined as “10” in each of the mobile routers 10. For example, if the communication partner is the user device 40, the wireless LAN communication function 13 performs wireless LAN communication with each user device 40 with 10 user devices 40 as the upper limit.

Similar to the mobile router 10, the access point 20 is a relay device that relays communication between devices connected to its own device, and is an example of the “second relay device” in the present invention.
FIG. 3 shows a functional configuration of the access point 20. The access point 20 has a wireless LAN communication function 21 and a wired communication function 22. The wireless LAN communication function 21 is a function for performing wireless LAN communication with the user device 40. The wired communication function 12 is a function for performing wired communication with a device (in this embodiment, the load distribution router 30) that is connected to the own device through a wired connection. The wireless LAN communication function 21 and the wired communication function 22 exchange data with each other. Thereby, the access point 20 is connected between a device that communicates with the wireless LAN communication function 21 (user device 40 shown in FIG. 1) and a device that communicates with the wired communication function 22 (load distribution router 30 shown in FIG. 1). Relay communications.

  In the wireless LAN communication function 21, the upper limit of the number of connections is determined similarly to the wireless LAN communication function 13, and an upper limit that is larger than the upper limit of the number of connections of the wireless LAN communication function 13 is determined. In the present embodiment, the upper limit of the number of connections of the wireless LAN communication function 21 is determined to be “30”. That is, the wireless LAN communication function 21 performs wireless LAN communication with each user device 40 with the upper limit being 30 user devices 40. Note that the upper limit of the number of connections of the wireless LAN communication functions 13 and 21 is not limited to that described above, and various numbers may be determined. In that case, the upper limit of the number of connections of the wireless LAN communication function 13 (this is referred to as “first number”) and the upper limit of the number of connections of the wireless LAN communication function 21 (this is referred to as “second number”) were compared. Sometimes the second number only needs to be larger than the first number.

Similar to the mobile router 10 and the like, the load distribution router 30 is a relay device that relays communication between devices connected to its own device, and is an example of the “third relay device” in the present invention.
FIG. 4 shows a functional configuration of the load distribution router 30. The load distribution router 30 has a wired communication function 31 and a data distribution function 32. The wired communication function 31 is a function for performing wired communication with a device connected to the own device by wire and relaying communication between these devices. As described above, a plurality of mobile routers 10 and access points 20 are connected to the load distribution router 30 by wire, and the wired communication function 31 relays communication between the plurality of mobile routers 10 and the access points 20. To do.

  The wired communication function 31 temporarily supplies the data transmitted from the access point 20 to the data distribution function 32. The data distribution function 32 performs a process of distributing the data supplied from the wired communication function 31 to each of the plurality of mobile routers 10. For example, the data distribution function 32 distributes data in units of packets, but is not limited thereto, and in units of data, or in units of nodes (data from the same user device 40 is distributed to the same mobile router 10). Or In addition, the data distribution function 32 may always distribute data to each mobile router 10 at an equal or constant ratio, or may distribute data according to the situation of the mobile router 10.

  In short, the data distribution function 32 distributes data using a well-known technique used in various devices called a load balancer and a load distribution device. The data distribution function 32 supplies the data distributed to each mobile router 10 to the wired communication function 31 in association with the destination of the data (for example, IP (Internet Protocol) address or URL (Uniform Resource Locator)). The wired communication function 31 transmits the data and the destination to the mobile router 10 that is the distribution destination. As described above, the wired communication function 31 and the data distribution function 32 cooperate to realize a function of distributing and transmitting data transmitted from the access point 20 to the plurality of mobile routers 10. Each mobile router 10 at the distribution destination transmits the data transmitted by the wired communication function 31 to the destination associated therewith by the mobile communication function 11.

The user device 40 is used by a user (school students in the present embodiment) and is connected to the network 2 to provide the user with information and services published on the Internet, for example.
FIG. 5 shows a functional configuration of the user device 40. The user device 40 has a wireless LAN communication function 41 and a UI (User Interface) function 42.

  The wireless LAN communication function 41 is a function that performs wireless LAN communication with a relay device that performs wireless LAN communication such as the mobile router 10 and the access point 20. The wireless LAN communication function 41 performs wireless LAN communication with the access point 20 in this embodiment. The wireless LAN communication function 41 exchanges data with the UI function 42. The UI function 42 is a function that provides a user interface such as accepting user operations, displaying images, and outputting sound. A user accesses the Internet using the UI function 42 to acquire public information or use a service.

  In summary, the data transmitted by the user device 40 to a device connected to the network 2 (for example, a Web page server device) is processed as follows. First, the access point 20 receives a data group transmitted from 30 user apparatuses 40 by wireless LAN communication and transmits it to the load distribution router 30. The load distribution router 30 distributes data received from the access point 20 to a plurality of mobile routers 10 and transmits the data. Each of the plurality of mobile routers 10 transmits the data received from the load distribution router 30 to the destination of the data via the network 2.

A procedure of a series of operations performed by each device included in the communication system 1 in the above-described processing in which data is distributed and transmitted will be described.
FIG. 6 illustrates an example of an operation procedure performed by each device of the communication system 1. FIG. 6 shows one of the plurality of user devices 40. First, the user device 40 transmits data such as an HTTP (Hypertext Transfer Protocol) request to the access point 20 in response to a user operation or the like (step S11: operation performed by the wireless LAN communication function 41 shown in FIG. 5). When the access point 20 receives data from the user device 40 in step S11 (operation performed by the wireless LAN communication function 21 shown in FIG. 3), the access point 20 transmits the data to the load balancing router 30 (step S12: wired communication function 22). Action to be performed).

  When the load distribution router 30 receives data from the access point 20 in step S12 (operation performed by the wired communication function 31 shown in FIG. 4), the load distribution router 30 performs processing to distribute the data to the plurality of mobile routers 10 (step S13: Operation performed by the data distribution function 32), the distributed data is transmitted to each mobile router 10 (steps S21, S31, S41: operations performed by the wired communication function 31). When each mobile router 10 receives data from the load distribution router 30 (operation performed by the wired communication function 12 shown in FIG. 2), each mobile router 10 transmits the data to the destination of the data via the network 2 (steps S22, S32, S42). : Operation performed by the mobile communication function 11).

  As described above, the communication system 1 transmits data from the plurality of user devices 40 to the network 2 using the relay devices such as the access point 20, the load distribution router 30, and the plurality of mobile routers 10. The number of user devices 40 that transmit data to the access point 20 is the upper limit of the number of connections of the access point 20 in this embodiment (30 in this embodiment), but is not limited thereto. The number may be smaller than the upper limit (that is, 29 or less).

  In the present embodiment, a plurality of user devices 40 are connected to the mobile router 10 via the access point 20 and the load distribution router 30, but when connected to the mobile router 10 without going through these, the following problems Occurs. For example, it is assumed that ten user devices 40 are connected to the three mobile routers 10 described above. In this case, since it is troublesome to set the user device 40 connected to each mobile router 10 every time, it is conceivable that the combination of the mobile router 10 and the user device 40 is fixedly used. In that case, for example, when only five mobile routers 10 are connected due to student absence or the like, the mobile router 10 only relays communication of the five user devices 40, so there is a margin in bandwidth. However, since the mobile router 10 to which the user device 40 is connected is fixed, the user device 40 connected to another mobile router 10 cannot use the bandwidth generated as the margin. That is, in this case, the band of wireless communication performed by the mobile router 10 with the network 2 cannot be used effectively.

  In the present embodiment, since the access point 20 whose upper limit of the number of connections is equal to or greater than the number of user devices 40 is used, the setting of the relay device to which the user device 40 is connected can be fixed in the same manner as the assumed case described above. There is no need to change the settings. The data group transmitted from the plurality of user devices 40 to the access point 20 is transmitted to each mobile router 10 so that the load is distributed by the load distribution router 30. Therefore, for example, even if the number of user devices 40 to be used is reduced, there is a margin only in the band of wireless communication that a certain mobile router 10 performs with the network 2, and the band of other mobile routers 10 becomes full. Nothing happens. According to the present embodiment, when the user apparatus 40 is connected to the network 2 using a plurality of relay apparatuses that are connected to the network by wireless communication, such as the mobile router 10, each of the relay apparatuses is connected to the network 2. The band of the wireless communication to be performed can be used effectively.

  In the present embodiment, one access point 20 performs wireless LAN communication with a plurality of user devices 40. For example, when two or more access points 20 perform wireless LAN communication in the same classroom, the radio waves transmitted from each other interfere with each other, leading to deterioration of the radio wave state, and wireless LAN communication tends to become unstable. Since there is only one access point 20, no such interference occurs, and stable wireless LAN communication can be realized by preventing deterioration of the radio wave condition.

[2] Second Embodiment Hereinafter, a second embodiment of the present invention will be described focusing on differences from the first embodiment. In the first embodiment, the plurality of mobile routers 10 are used only in a state where they are connected to the load distribution router 30 by wire. The mobile router is also used in the “connection state”.

A specific mode in which the mobile router is connected to the load distribution router 30 by wire will be described. The mobile router is connected to the load distribution router 30 in a wired manner by being mounted on a connection device (so-called cradle) having a connector for performing charging and wired connection.
FIG. 7 shows the appearance of the mobile router 10a and the connection device 6 of the second embodiment. The connection device 6 includes a connector 8 that is connected to the load distribution router 30 via a cable 7 in a wired manner.

  FIG. 7A shows a state before the mobile router 10 a is attached to the connector 8. In this state, the mobile router 10a is not connected to the load distribution router 30. The mobile router 10a is mounted on the connection device 6 and attached to the connector 8 as shown in FIG. 7B, so that the mobile router 10a is connected to the load distribution router 30 by wire (hereinafter referred to as “connection state”). )become.

  FIG. 8 shows a functional configuration of the mobile router 10a. The mobile router 10a has a control function 14 in addition to the functions shown in FIG. The control function 14 is realized by a CPU (Central Processing Unit) executing a program stored in a ROM (Read Only Memory) or the like using a RAM (Random Access Memory) as a work area. The control function 14 performs control to disable the wireless LAN communication function 13 if the own apparatus is in a connected state, and to enable the wireless LAN communication function 13 if not connected.

  To give a specific example, the mobile router 10a is placed on the connection device 6 and used in a connected state when students as users are in the classroom, but when the students take a class outside the classroom, the connection device 6 6 is used in a disconnected state. The unconnected mobile router 10a is carried by a teacher to a place where classes are taken, for example. At that time, the access point 20 is left in the classroom while being stored in the storage device 4 shown in FIG. 1, and the radio waves of the access point 20 do not reach the user device 40. At this time, since the mobile router 10a is enabled by the operation of the control function 14 described above, the user device 40 is connected to the mobile router 10a to perform wireless LAN communication. The state at this time is shown in FIG.

  FIG. 9 shows the overall configuration of the communication system 1a of the present embodiment. Each user device 40 has a mobile router 10a to be connected in advance, for example, and is connected to the set mobile router 10a. At that time, each mobile router 10a is set to be connected to the user device 40 that is equal to or less than the upper limit of the number of connections (the first number described above, for example, 10). As described above, in this embodiment, when each of the plurality of mobile routers 10a is not connected, the data transmitted from the user devices 40 below the upper limit of the number of connections of the own device by wireless LAN communication is transmitted to the network 2. Mobile communication is performed with the data and transmitted to the destination of the data. Each mobile router 10a determines that the mobile device 10a is disconnected when its own device is detached from the connector 8 by the operation of the control function 14 shown in FIG. 8, and performs the operation in such a disconnected state.

  When the mobile router 10 a is taken out from the storage device 4 and moved, the mobile router 10 a is removed from the connection device 6. In the present embodiment, the removal enables the wireless LAN communication function 13 so that the user device 40 is connected to the network 2 only through the mobile router 10a as shown in FIG. . The act of removing the mobile router 10a from the connection device 6 is always performed when the mobile router 10a is carried. Therefore, according to the present embodiment, the user apparatus 40 is connected to the network 2 without being connected to the network 2 via the access point 20 and the load distribution router 30 without requiring any special operation by the user. It is possible to switch to the state to be performed.

[3] Modified Examples Each of the above-described embodiments is merely an example of the embodiment of the present invention, and may be modified as follows. Moreover, you may implement each embodiment mentioned above and each modification shown below, combining each as needed.

[3-1] Judgment of unconnected state In the second embodiment, the mobile router determines the unconnected state based on the state of attachment to the connector 8 shown in FIG. For example, the mobile router 10a shown in FIG. 9 or the like may make this determination based on whether or not a radio wave transmitted from the access point 20 is received.

  The access point 20 transmits radio waves including, for example, the above-described SSID as identification information for identifying its own device. The mobile router 10a determines that the mobile router 10a is in a disconnected state when it enters a state where it does not receive a radio wave including this identification information. In this case, it is not determined that the mobile router 10a is disconnected immediately after the mobile router 10a is removed from the connector 8, and the mobile router 10a is disconnected when it is carried to a position where the radio waves of the access point 20 do not reach. Will be judged. As a result, the user apparatus 40 cannot be connected to the network 2 for a while after the movement is started. For example, the user can be directed not to look at the user apparatus 40 during the movement.

In addition, the mobile router may determine the non-connection state based on the position of the own device, for example.
FIG. 10 shows a functional configuration of the mobile router 10b of this modification. The mobile router 10b has a positioning function 15 in addition to the functions shown in FIG. The positioning function 15 measures the latitude and longitude representing the position of the own device by using, for example, GPS (Global Positioning System) technology. The positioning function 15 measures the position of its own device periodically (for example, every minute) and supplies position data indicating the measured position to the control function 14. The control function 14 is disconnected when, for example, the position indicated by the supplied position data, that is, the measured position of the own device is not included in the range from the state included in the predetermined range. Judge that it is in a state.

  The mobile router 10b stores range data indicating the latitude and longitude ranges when the position of its own device is included in the predetermined range described above. The control function 14 makes this determination based on the range indicated by the range data. As the predetermined range, for example, a range indicating the school building, a range indicating the school site including the school yard, and the like are determined. In this case, it is determined that the user apparatus 40 is still connected at the place defined as the predetermined range, and the user apparatus 40 cannot connect to the network 2. In this way, by using the position of the own device, it is possible to specifically determine a place to be directed so that the user does not look at the user device 40.

  Needless to say, the user (for example, a school teacher) may determine whether the wireless LAN communication function 13 is enabled or disabled by manually operating the mobile router 10 by determining the connection state and the non-connection state. .

[3-2] Network Although the network includes the Internet in the embodiment, it is not limited to this. For example, instead of the Internet, a closed network that can be connected via a mobile communication network (for example, a network used only by a specific company or organization) may be included. Also in this case, communication between the user device 40 and the device connected to the closed network is relayed by the communication system.

[3-3] Wireless Communication In the embodiment, mobile communication is performed as the first wireless communication and wireless LAN communication is performed as the second wireless communication. However, the present invention is not limited to this. For example, satellite communication may be performed as the first wireless communication instead of the mobile communication, or Bluetooth (registered trademark) may be performed as the second wireless communication instead of the wireless LAN communication. In short, wireless communication in which the network has an interface may be performed as the first wireless communication, and wireless communication in which the user apparatus has a function may be performed as the second wireless communication.

[3-4] Category of the Invention The present invention can be understood as a communication system including relay devices such as a plurality of mobile routers, access points, and load distribution routers. As in the embodiment, the communication system may include the network 2, the plurality of user devices 40, and the storage device 4, or these may have an external configuration. The present invention can also be understood as a communication method for realizing processing performed by each device included in the communication system.

DESCRIPTION OF SYMBOLS 1 ... Communication system, 2 ... Network, 3 ... Base station, 4 ... Storage apparatus, 5 ... User apparatus storage part, 6 ... Connection apparatus, 8 ... Connector, 10 ... Mobile router, 11 ... Mobile communication function, 12, 22 , 31 ... Wired communication function, 13, 21, 41 ... Wireless LAN communication function, 14 ... Control function, 15 ... Positioning function, 20 ... Access point, 30 ... Load distribution router, 32 ... Data distribution function, 40 ... User device, 42 ... UI function.

Claims (6)

A function of performing first wireless communication with a network having a wireless communication interface, a function of performing second wireless communication with each user device up to the first number of user devices, and a function of performing wired communication A plurality of first relay devices comprising:
A second relay device having a function of performing the second wireless communication with each of the user devices up to a second number of the user devices greater than the first number, and a function of performing a wired communication;
A third relay device in which the plurality of first relay devices and the second relay device are connected by wire, and data transmitted from the second relay device is distributed to the plurality of first relay devices. A third relay device having a function of transmitting,
The second relay device receives a data group transmitted by the second wireless communication from the second or less number of user devices and transmits the data group to the third relay device;
The third relay device transmits the data received from the second relay device in a distributed manner to the plurality of first relay devices,
Each of the plurality of first relay devices transmits the data received from the third relay device to the destination of the data via the network ,
A communication system in which the plurality of first relay devices perform the first wireless communication in accordance with the same communication standard . Each of the plurality of first relay devices receives data transmitted by the second wireless communication from the first number or less of user devices in a non-connected state that is not connected to the third relay device, The communication system according to claim 1, wherein the first wireless communication is performed with the network and transmitted to a destination of the data. Each of the plurality of first relay devices is connected to the third relay device in a wired manner by being attached to a connector connected to the third relay device in a wired manner, and is disconnected when removed from the connector The communication system according to claim 2, wherein it is determined that a state has been reached. The second relay device transmits radio waves including identification information for identifying the device,
4. The communication system according to claim 2, wherein each of the plurality of first relay devices determines that the disconnection state is established when the radio wave including the identification information is changed from being received to being not received. 5. Each of the plurality of first relay devices measures the position of its own device, and when the measured position is not included in the range from the state included in the predetermined range, the disconnection The communication system according to any one of claims 2 to 4, wherein the communication system is determined to be in a state. A function of performing first wireless communication with a network having a wireless communication interface, a function of performing second wireless communication with each user device up to the first number of user devices, and a function of performing wired communication A plurality of first relay devices comprising:
A second relay device having a function of performing the second wireless communication with each of the user devices up to a second number of the user devices greater than the first number, and a function of performing a wired communication;
A third relay device in which the plurality of first relay devices and the second relay device are connected by wire, and data transmitted from the second relay device is distributed to the plurality of first relay devices. A communication system comprising a third relay device having a function of transmitting,
A first step in which the second relay device receives a data group transmitted by the second wireless communication from the second or less number of user devices and transmits the data group to the third relay device;
A second step in which the third relay device transmits the data received from the second relay device in a distributed manner to the plurality of first relay devices;
A third step in which each of the plurality of first relay devices transmits data received from the third relay device to a destination of the data via the network;
A communication method in which the plurality of first relay devices perform the first wireless communication according to the same communication standard .

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