JP6199921B2 - Communication control system, communication control method, and communication control program - Google Patents

Description

  The present invention relates to a communication control system that includes a communication media adapter device that connects a router device to a wireless communication terminal device, and that connects the router device to a predetermined communication network via a wireless line.

  In a network system for connecting a LAN (Local Area Network) to a communication network such as the Internet (hereinafter referred to as “network”) via a wireless line, a router device connected to the LAN and a wireless communication terminal device connected to the network Are communicably connected by a communication media adapter device (hereinafter referred to as “media adapter device”). This media adapter device has a function of converting communication media from LAN to wireless or from wireless to LAN. A technique for efficiently controlling such a network system so as not to cause a communication problem is expected.

  As an example of such a technique, Patent Document 1 discloses a communication system that can easily change the content of traffic control of adapter communication that a router device connects to a predetermined network via a media adapter device and a wireless network operator network. Is disclosed. In this communication system, a router device performs adapter communication connected to a predetermined network via a media adapter device and a wireless network operator network. The wireless communication terminal device changes the value of the parameter related to the adapter communication set in each of the router device and the media adapter device based on the communication state with the wireless network provider network.

  Patent Document 2 discloses a system having a function of reducing a situation in which a router device can automatically connect to a media adapter device and a buffer of the media adapter device cannot hold data. Yes. In this system, the media adapter device adds automatic connection information to an optional part of a packet notified from the media adapter device to the router device when the router device connects to another network via the media adapter device. The router device establishes a connection for buffer control of the media adapter device based on the automatic connection information. The media adapter device notifies the router device of the transmission rate between the media adapter device and another network using a connection for buffer control. Then, the router device determines the communication speed between the router device and the media adapter device based on the notified transmission speed.

  Patent Document 3 discloses a communication device that processes a plurality of IPsec (Security Architecture for Internet Protocol) sessions. This communication apparatus establishes a plurality of IPsec sessions simultaneously with the same IPsec gateway apparatus. The communication apparatus continues communication using a plurality of IPsec sessions even when a key update (Rekey) occurs.

Japanese Patent Laid-Open No. 2014-175691 JP 2012-090148 A JP 2008-092108 A

  For example, in a network system in which a wired LAN is connected to the Internet via a wireless line, the band of the wireless line is generally narrower than the communication band (hereinafter referred to as “band”) of the wired LAN. In addition, in communication services provided by wireless network operators, the maximum communication volume per month is generally set, and when the actual communication volume exceeds this maximum communication volume, the bandwidth that can be communicated is significantly reduced until the end of the month. There are many cases. As a result, the difference between the LAN band and the wireless line band is further expanded. In such a communication environment, when an information processing terminal device connected to a LAN connects to the Internet via a wireless line, the bandwidth of the wireless line becomes a bottleneck. There is a problem that greatly decreases. With the techniques described in Patent Documents 1 to 3, it is difficult to solve this problem.

  The main object of the present invention is to provide a communication control system or the like that solves this problem.

  A communication control system according to an aspect of the present invention includes a plurality of wireless communication terminal devices connectable to a communication network by a wireless line, and a media adapter device connected to the router device and the plurality of wireless communication terminal devices. The media adapter device monitors a state of communication performed by the router device via the first wireless communication terminal device connected to the communication network, and the state of communication satisfies the first condition. In this case, the router device is added to the first wireless communication terminal device by connecting at least any second wireless communication terminal device that is not connected to the communication network to the communication network. A communication path capable of communicating via the second wireless communication terminal device connected to the communication network.

  In another aspect of achieving the above object, a communication control method according to an aspect of the present invention includes a plurality of wireless communication terminal devices connectable to a communication network by wireless lines, a router device, and the plurality of wireless communication terminal devices. In the system comprising the media adapter device connected to the network adapter, the media adapter device monitors a state of communication performed by the router device via the first wireless communication terminal device connected to the communication network. When the communication state satisfies a predetermined condition, the router device is connected to the communication network by connecting at least one of the second wireless communication terminal devices not connected to the communication network to the communication network. The second wireless communication connected to the communication network in addition to the first wireless communication terminal device Building a communicable communication path through the end device.

  In a further aspect of achieving the above object, a communication control program according to an aspect of the present invention is a media adapter connected to a router device and a plurality of wireless communication terminal devices connectable to a communication network by a wireless line. When the state of communication performed by the router device via the first wireless communication terminal device connected to the communication network is monitored and the state of communication satisfies a predetermined condition, the communication network The router device is connected to the communication network in addition to the first wireless communication terminal device by connecting at least one of the second wireless communication terminal devices that are not connected to the communication network. The process which builds the communication path | route which can communicate via said 2nd radio | wireless communication terminal device was performed.

  Furthermore, the present invention can also be realized by a computer-readable non-volatile storage medium storing such a communication control program (computer program).

  The present invention makes it possible to secure a bandwidth necessary for communication between a router device and a predetermined network in a system in which the router device is connected to a predetermined network via a wireless line.

It is a block diagram which shows the structure of the communication control system which concerns on 1st Embodiment of this invention. It is a figure which illustrates the structure of the packet data which the media adapter apparatus which concerns on 1st Embodiment of this invention transmits to a center side router apparatus after https authentication. It is a figure which illustrates the structure of the packet data which the center side router apparatus based on 1st Embodiment of this invention returns with respect to a media adapter apparatus. It is a figure which illustrates the structure of the original header information added as a TCP header, when the media adapter apparatus which concerns on 1st Embodiment of this invention encapsulates ESP data in TCP. It is a flowchart (1/2) which shows the operation | movement in which the communication control system which concerns on 1st Embodiment of this invention constructs | assembles the communication path | route via the radio | wireless communication terminal device for band reservation. It is a flowchart (2/2) which shows the operation | movement which the communication control system which concerns on 1st Embodiment of this invention constructs | assembles the communication path | route via the radio | wireless communication terminal device for band reservation. 4 is a flowchart showing an operation of the media adapter device according to the first embodiment of the present invention expanding or reducing the bandwidth of a wireless line according to a communication state. It is a flowchart which shows the operation | movement which the center side router apparatus based on 1st Embodiment of this invention transmits data with respect to a router apparatus. It is a block diagram which shows the structure of the communication control system which concerns on the modification of 1st Embodiment of this invention. It is a block diagram which shows the structure of the communication control system which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the information processing apparatus which can execute the media adapter apparatus which concerns on each embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a block diagram conceptually showing the structure of the communication control system 1 according to the first embodiment. The communication control system 1 according to the present embodiment includes a media adapter device 10, a wireless communication terminal device 11 for normal use, and wireless communication terminal devices 12-1 to 12-n for securing a band (n is an integer of 1 or more), A router device 13 and a center side router device 14 are provided.

  The router device 13 is connected to, for example, a corporate LAN, and controls the transfer of communication data transmitted and received between the server 16 or client terminal device connected to the corporate LAN and the Internet 16.

  The center side router device 14 is a router device connected to the Internet 16 and installed in, for example, a data center. The router device 13 and the center side router device 14 communicate with each other via the Internet 16.

  The wireless communication terminal device 11 for normal use is a communication terminal device that can be connected to the wireless network provider network 15 by a wireless line. The radio network 15 is connected to the Internet 16. Therefore, the router device 13 and the center side router device 14 can communicate with each other by connecting the wireless communication terminal device 11 for normal use to the wireless network provider network 15. When the router device 13 and the center side router device 14 communicate with each other, the wireless communication terminal device 11 for normal use is a communication path (first established as a communication path via a wireless line by the media adapter device 10 ( Hereinafter, it is a communication terminal device used in a “main line”.

  The bandwidth securing wireless communication terminal devices 12-1 to 12-n are communication terminal devices that can be connected to the wireless network provider network 15 by wireless lines, as in the case of the normal use wireless communication terminal device 11. The radio communication terminal apparatuses 12-1 to 12-n for securing the band increase the band of the radio line when the router apparatus 13 and the center side router apparatus 14 are communicating via the main line. It is a communication terminal device used in a communication path (hereinafter referred to as “bandwidth reserved line”) that is added to the main line as a communication path via a wireless line by the media adapter device 10.

  The media adapter device 10 is connected to the router device 13 by, for example, an Ethernet (registered trademark) (1 Giga bit, 100 Mega bit, etc.) LAN cable. The media adapter device 10 is connected to a wireless communication terminal device 11 for normal use and wireless communication terminal devices 12-1 to 12-n for securing a band.

  When the media adapter device 10 receives a connection request based on PPPoE (Point-to-Point Protocol over Ethernet) from the router device 13, the media adapter device 10 includes a wireless communication terminal device 11 for normal use provided in the wireless network provider network 15. Connect to (not shown). The media adapter device 10 acquires an IP (Internet Protocol) address used by the wireless communication terminal device 11 for normal use from the wireless network provider network 15. The media adapter device 10 constructs the main line by notifying the router device 13 of the acquired IP address. Thereby, the router device 13 can access the Internet 16 via the main line.

  The media adapter device 10 starts monitoring the communication state of the main line after the router device 13 starts communication such as IPsec communication to the center side router device 14 using the main line. For example, after issuing a ping command to the center side router device 14, the media adapter device 10 monitors the state of response from the center side router device 14 (delay time, frequency of occurrence of no response, etc.).

  If the monitoring result is equal to or greater than the threshold, the media adapter device 10 determines that a state in which the bandwidth of the main line communication is insufficient has occurred. The threshold value used when the media adapter device 10 determines that a state in which the communication band is insufficient is hereinafter referred to as a “connection threshold value”. When the monitoring result is equal to or greater than the connection threshold, the media adapter device 10 connects the wireless communication terminal device 12-1 for securing the bandwidth to an access point (not shown) provided in the wireless network provider network 15. The access point to which the wireless communication terminal device 12-1 for securing the band is connected may be the same as the access point to which the wireless communication terminal device 11 for normal use is connected, or the wireless communication terminal device for normal use 11 may be an access point provided in a wireless network operator network provided by a carrier (communication service operator) different from that in FIG. The media adapter device 10 acquires the IP address used by the wireless communication terminal device 12-1 for securing the bandwidth from the wireless network provider network 15. Accordingly, the media adapter device 10 can access the Internet 16 via the wireless communication terminal device 12-1 for securing the band.

  The media adapter device 10 is connected to the center side router device 14 by using https (Hypertext Transfer Protocol Secure) communication using the main line, and receives user authentication by the standard function of https. After receiving the user authentication, the media adapter device 10 transmits the packet data 400 to the center side router device 14 by https communication. A configuration example of the packet data 400 is shown in FIG.

  As illustrated in FIG. 2, the packet data 400 is 128-bit (16 bytes) data. The packet data 400 includes a public key 401 of the media adapter device, a main line IP address 402, a bandwidth reservation hostname 403, and a bandwidth reservation line IP address 405. The public key 401 of the media adapter device is key information published by the media adapter device 10. The main line IP address 402 is an IP address used by the wireless communication terminal device 11 for normal use. The bandwidth reservation hostname 403 is an interface number used by the wireless communication terminal device 11 for normal use. The bandwidth reservation line IP address 405 is an IP address used by the wireless communication terminal device 12-1 for bandwidth reservation.

  The media adapter device 10 receives the packet data 410 returned from the center side router device 14 in response to the packet data 400. A configuration example of the packet data 410 is shown in FIG.

  As illustrated in FIG. 3, the packet data 410 is 128-bit (16 bytes) data. In the packet data 410, the center side router device 14 updates the public key 401 of the media adapter device in the packet data 400 to the public key 411 of the center side router device. The public key 411 of the center side router device is key information published by the center side router device 14. The port number 414 of the packet data 410 is added to the packet data 400 by the center side router device 14. The port number 414 is a port number used as a destination by TCP (Transmission Control Protocol) communication performed via the wireless communication terminal device 12-1 for securing the bandwidth.

  The media adapter device 10 thus constructs a bandwidth reservation line via the wireless communication terminal device 12-1 for bandwidth reservation by transmitting and receiving information to and from the center side router device 14.

  The media adapter device 10 constructs a bandwidth reservation line via the wireless communication terminal device 12-1 for bandwidth reservation, and then transmits control system data included in IPsec communication from the router device 13 to the center side router device 14 to the main line. The main system data included in the IPsec communication is transmitted via the bandwidth reservation line. Control system data is data including Rekey in IPsec communication. The main system data is data including ESP (Encapsulating Security Payload) in IPsec communication.

  The media adapter device 10 embeds unique header information 500 in main body data such as ESP included in the IPsec communication data, and generates TCP packet data encapsulated to the port number 414. A configuration example of the unique header information 500 is shown in FIG.

  As illustrated in FIG. 4, the unique header information 500 is 32-bit (4 bytes) information. The unique header information 500 includes a generation key 501. The generation key 501 is key information generated based on the public key 411 of the center side router device acquired by the media adapter device 10 from the center side router device 14. The media adapter device 10 transmits the generated TCP packet data to the center side router device 14 using a bandwidth securing line via the bandwidth securing wireless communication terminal device 12-1.

  The media adapter device 10 starts communication using the bandwidth securing line via the bandwidth securing wireless communication terminal device 12-1, and then starts monitoring the amount of communication data flowing through the bandwidth securing line. At this point, the media adapter device 10 monitors both the main line and the bandwidth securing line via the bandwidth securing wireless communication terminal device 12-1. When the monitoring result by the media adapter device 10 is equal to or greater than the connection threshold for at least one of the main line and the bandwidth reservation line, the media adapter device 10 is in a state where the bandwidth obtained by adding the bandwidth reservation line to the main line is insufficient Is determined to have occurred. In this case, the media adapter device 10 constructs a bandwidth securing line via the bandwidth securing wireless communication terminal device 12-2 according to the same procedure as the bandwidth securing wireless communication terminal device 12-1.

  The media adapter device 10 constructs a bandwidth reservation line via the wireless communication terminal device 12-2 for bandwidth reservation, and then starts communication using the bandwidth reservation line. The media adapter device 10 starts monitoring the amount of communication data flowing through the bandwidth reservation line. When the monitoring result is equal to or greater than the connection threshold for at least one of the main line and the band securing line using the radio communication terminal apparatuses 12-1 and 12-2 for band securing, the media adapter device 10 A bandwidth securing line is established via the wireless communication terminal device 12-3, and the same processing as that of the wireless communication terminal device 12-2 for securing bandwidth is performed. That is, the media adapter device 10 sequentially constructs a bandwidth reservation line via the wireless communication terminal device 12-i for securing bandwidth (i is an integer from 1 to n) until the shortage of communication bandwidth is resolved. To do.

  In a state where communication is performed using the main line and at least one or more bandwidth securing lines, the media adapter device 10 secures the bandwidth when the monitoring result is equal to or less than the disconnection threshold for any of these lines. Communication using one of the lines is terminated, and the band reserved line is disconnected. Here, the disconnection threshold is a threshold used when the media adapter device 10 determines that one of the bandwidth reservation lines may be disconnected as a result of a margin in the communication band.

  As described above, when the media adapter device 10 constructs a bandwidth reservation line via the wireless communication terminal device 12-i for securing the bandwidth, the center side router device 14 and the packet data 400, 410 is transmitted and received.

  The center side router device 14 confirms the port number 414 and the generation key 501 with respect to the encapsulated TCP packet data received from the media adapter device 10, thereby releasing the capsule and extracting the main system data in IPsec communication. To do. The center side router device 14 performs a process of receiving IPsec communication data for the control system data received via the main line and the main body data received via the bandwidth reservation line.

  When the center side router device 14 transmits data to the router device 13 in a state where any one of the bandwidth reservation lines is established, the center side router device 14 transmits the data via the main line and the established bandwidth reservation line. To do. In this case, the center side router device 14 measures the amount of packet data received per unit time via each of the main line and the bandwidth reservation line. The center side router device 14 distributes the packet data to be transmitted to the router device 13 to each of the main line and the bandwidth reservation line based on the ratio corresponding to the measured value, and transmits the data. For example, the ratio of the amount of packet data received by the center side router device 14 per unit time via the main line and the bandwidth reservation line via the wireless communication terminal device 12-1 for bandwidth reservation is 3: 2. Think about the case. In this case, the center side router device 14 distributes and transmits the packet data to be transmitted to the router device 13 to the main line and the bandwidth reservation line at a ratio of 3: 2.

  When the center side router device 14 performs TCP communication with the router device 13 via the main line and the bandwidth reservation line, the key generated based on the public key 401 of the media adapter device obtained from the media adapter device 10 is used. Send using information.

  Next, with reference to the flowcharts of FIG. 5A and FIG. 5B, the operation (processing) in which the communication control system 1 according to the present embodiment constructs a communication path via the wireless communication terminal device 12-1 for securing the band will be described in detail. explain. The operation of the communication control system 1 establishing a communication path via any one of the wireless communication terminal apparatuses 12-2 to 12-n for securing the band is the same.

  The router device 13 starts IPsec communication with the center side router device 14 using a communication path (main line) via the wireless communication terminal device 11 for normal use (step S101). The media adapter device 10 issues a ping command and monitors the communication state of the main line for the monitoring packet data (step S102). If the communication state does not satisfy the predetermined condition (No in step S103), the process returns to step S102. If the communication state satisfies a predetermined condition (Yes in step S103), the media adapter device 10 issues a connection request to the wireless network provider network 15 via the wireless communication terminal device 12-1 for securing the bandwidth (step). S104).

  The media adapter device 10 obtains the IP address of the wireless communication terminal device 12-1 for securing the bandwidth from the wireless network provider network 15 (step S105). The media adapter device 10 transmits the packet data 400 to the center side router device 14 using the main line (step S106). The center side router device 14 returns the packet data 410 to the media adapter device 10 using the main line (step S107). The media adapter device 10 constructs a communication path (band securing line) via the band securing wireless communication terminal device 12-1 (step S108).

  The media adapter device 10 incorporates the unique header information 500 into the main body data included in the IPsec communication data, and generates TCP packet data encapsulated to the port number 414 (step S109). The media adapter device 10 transmits the generated TCP packet data to the center side router device 14 using the bandwidth reservation line with the IP address of the wireless communication terminal device 12-1 for bandwidth reservation as the transmission source (step). S110).

  The media adapter device 10 transmits the control system data included in the IPsec communication data to the center side router device 14 using the main line (step S111). The center side router device 14 confirms the port number 414 and the generation key 501 for the received TCP packet data, and releases the capsule (step S112). The center side router device 14 performs a process for receiving the IPsec communication data for the main body data and the received control system data (step S113), and the entire process ends.

  Next, with reference to the flowchart of FIG. 6, the operation (processing) in which the media adapter device 10 according to the present embodiment expands or contracts the bandwidth of the wireless line according to the communication state will be described in detail.

  The media adapter device 10 issues a ping command to the center side router device 14 using the main line, and starts monitoring response delay and no response (monitoring 1) (step S201). If the result of monitoring 1 is not equal to or greater than the connection threshold (No in step S202), the process returns to S201. When the result of the monitoring 1 is equal to or greater than the connection threshold (Yes in Step S202), the media adapter device 10 sets 1 to the variable i (i is an integer from 1 to n) (Step S203). The media adapter device 10 constructs a bandwidth reservation line (band reservation line i) via the wireless communication terminal device 12-i for bandwidth reservation (step S204).

  The media adapter device 10 starts monitoring the amount of communication data (monitoring 2) flowing through the bandwidth securing line i (step S205). When the result of at least one of the monitoring 1 and the monitoring 2 is equal to or greater than the connection threshold (Yes in Step S206), the media adapter device 10 sets i + 1 to the variable i (Step S207), and the process returns to S204. If both the results of monitoring 1 and monitoring 2 are less than the connection threshold (No in step S206), the process proceeds to step S208.

  If both the results of monitoring 1 and monitoring 2 are larger than the disconnection threshold (No in step S208), the process returns to step S206. When the result of at least one of the monitoring 1 and the monitoring 2 is equal to or lower than the disconnection threshold (Yes in step S208), the media adapter device 10 ends the communication using the bandwidth reservation line i and disconnects the bandwidth reservation line i. (Step S209). If the value of the variable i is 1 (Yes in step S210), the process returns to step S202. When the value of the variable i is not 1 (No in Step S210), the media adapter device 10 sets i-1 to the variable i (Step S211), and the process returns to Step S202.

  Next, an operation (process) in which the center side router device 14 according to the present embodiment transmits data to the router device 13 will be described in detail with reference to a flowchart of FIG.

  The center side router device 14 checks whether or not the bandwidth reservation lines 1 to i are constructed (step S301). When the bandwidth reservation lines 1 to i are not constructed (No in step S302), the center side router device 14 transmits data to the router device 13 via the main line (step S303).

  When the bandwidth reservation lines 1 to i are constructed (Yes in step S302), the center side router device 14 determines the amount of packet data received per unit time via each of the main line and the bandwidth reservation lines 1 to i. Measurement is performed (step S304). The center side router device 14 distributes the packet data to be transmitted to the router device 13 to each of the main line and the bandwidth reservation lines 1 to i based on the ratio according to the measured value, and transmits the data (step S305). The entire process ends.

  The communication control system 1 according to the present embodiment can secure a bandwidth necessary for communication between the router device and the predetermined network when the router device is connected to the predetermined network via a wireless line. The reason is that the media adapter device 10 connected to the router device 13 monitors the communication state of the communication path (main line) via the wireless communication terminal device 11 for normal use, and the communication state of the main line is predetermined. This is because when the above condition is satisfied, a communication path (bandwidth securing line) is established through at least one of the band securing radio communication terminal apparatuses 12-1 to 12-n.

  For example, in a network system in which a wired LAN is connected to the Internet via a wireless line, the bandwidth of the wireless line is generally narrower than that of the wired LAN. In such a communication environment, when an information processing terminal device connected to a LAN connects to the Internet via a wireless line, the bandwidth of the wireless line becomes a bottleneck. There is a problem that greatly decreases.

  On the other hand, the communication control system 1 according to the present embodiment has a bandwidth as a device for connecting the router device 13 to the Internet 16 via the wireless network operator network 15 in addition to the wireless communication terminal device 11 for normal use. Wireless communication terminal devices 12-1 to 12-n for securing are provided. The media adapter device 10 monitors the communication state of the main line after constructing the main line via the wireless communication terminal device 11 for normal use. If the media adapter device 10 determines that the bandwidth of the main line is insufficient compared to the amount of data transmitted and received by the router device 13 to and from the Internet 16 based on the monitoring result, the wireless communication terminal for securing the bandwidth A bandwidth reservation line through at least one of the devices 12-1 to 12-n is constructed. As a result, the router device 13 can access the Internet 16 in a band obtained by adding a bandwidth securing line to the main line. Therefore, the communication control system 1 according to the present embodiment can avoid the bandwidth of the wireless line becoming a bottleneck.

  In addition, the media adapter device 10 according to the present embodiment monitors the state of communication performed by the router device 13 using the main line and the bandwidth reservation line, and further adds a bandwidth reservation line in real time according to the monitoring result. Or the bandwidth reservation line that is in use is disconnected. That is, the media adapter device 10 can flexibly set the bandwidth of the wireless line. As a result, the communication control system 1 according to the present embodiment can avoid unnecessarily widening the bandwidth of the wireless line, and set the bandwidth of the wireless line to an optimum value based on performance and cost.

  Also, the media adapter device 10 according to the present embodiment, for example, when IPsec communication is performed, inputs control system data such as Rekey included in the IPsec communication data to the main line, and reserves main system data such as ESP. Enter on the line. That is, since the media adapter device 10 allows only control system data to flow through the main line, it is possible to avoid a situation in which the bandwidth is insufficient with respect to the communication path through which the control system data flows. Thereby, the communication control system 1 which concerns on this embodiment can perform IPsec communication stably.

  In the communication control system 1 according to the present embodiment, when the media adapter device 10 connects the wireless communication terminal device 12-i for securing the band to the Internet 16, the wireless communication terminal device 11 and the band for normal use are connected. The IP address used by the securing wireless communication terminal device 12-i and the public key 401 of the media adapter device are transmitted to the center side router device 14. Then, the center side router device 14 transmits the public key 411 of the center side router device and the port number used for communication via the wireless communication terminal device 12-i for securing the band to the media adapter device 10. Thus, the wireless communication terminal device 12-i for securing the band is authenticated. Thereby, the communication control system 1 which concerns on this embodiment can improve the safety | security of communication.

  In the communication control system 1 according to the present embodiment, when the router device 13 performs IPsec communication, the media adapter device 10 adds the public key 411 of the center side router device to the main body data extracted from the IPsec communication data. TCP packet data incorporating the generation key generated based on the base is generated. The media adapter device 10 transmits the TCP packet data to the center side router device 14 through the wireless communication terminal device 12-i for securing the bandwidth. The control system data related to the TCP packet data received by the center side router device 14 via the main line is associated with the main system data based on the generation key included in the TCP packet data received via the bandwidth reservation line. The center side router device 14 performs processing for receiving IPsec communication data based on the control system data and the main system data. In this case, since the IPSec communication is processed as one connection, the router device 13 does not need to have a function of dividing the IPsec communication into a plurality of connections. That is, the communication control system 1 according to the present embodiment can process the IPsec communication performed by the router device 13 having a simple function separately for the main line and the bandwidth reservation line while maintaining one connection. The cost can be reduced.

  Further, when the center side router device 14 replies to the received data, the center side router device 14 generally transmits an amount of data corresponding to the received data amount. And the center side router apparatus 14 transmits / receives, after storing the data to transmit / receive in the buffer provided for every line | wire. Therefore, if the center side router device 14 does not transmit the amount of data corresponding to the received data amount for each line, the buffer used by the own device for that line cannot accept the data, and so-called overflow occurs. There is a risk of it happening. In the communication control system 1 according to the present embodiment, the center side router device 14 receives the data amount of data received via the main line within a predetermined time and the data amount of data received via the individual bandwidth reservation lines. The ratio is calculated. The center side router device 14 distributes data to be transmitted to the router device 13 to the main line and the individual bandwidth reservation lines based on the ratio. As a result, the communication control system 1 according to the present embodiment transmits an amount of data corresponding to the amount of data received for each line, and therefore avoids the occurrence of a communication bottleneck on any line. Can do.

  Furthermore, in the communication control system 1 according to the present embodiment, the wireless communication terminal device 11 for normal use and the wireless communication terminal devices 12-1 to 12-n for securing the band are respectively provided by different carriers. You may connect to the internet 16 via the access point with which a provider network is provided. As a result, the communication control system 1 according to the present embodiment, for example, when a failure occurs in the wireless network provider network provided by one of the carriers, via the wireless network provider network provided by another carrier Since the wireless communication terminal device can be connected to the Internet 16, the availability of the system can be increased.

  Further, in the communication control system 1 according to the present embodiment, when the carrier starts to provide a new wireless communication service, the wireless communication terminal device is replaced or the software that operates the media adapter device is updated. The new wireless communication service can be flexibly dealt with.

<Modification of First Embodiment>
FIG. 8 is a block diagram conceptually showing the configuration of the communication control system 2 according to a modification of the first embodiment. In the following description, configurations that operate in the same manner as in the first embodiment are given the same numbers as in the first embodiment, and description thereof is omitted.

  The communication control system 2 according to the modified example of the present embodiment includes a media adapter device 20, a wireless communication terminal device 11 for normal use, wireless communication terminal devices 12-1 to 12-n for securing bandwidth, a router device 23, and The center side router device 14 is provided.

  The router device 23 is connected to the Internet 16 via a wired line operator network 25 by a wired line. When a failure occurs in the wired line, the router device 23 notifies the media adapter device 20 that a failure has occurred.

  When the media adapter device 20 is notified from the router device 23 that a failure has occurred in the wired line, the media adapter device 20 uses the wireless communication terminal devices 12-1 to 12-n for securing bandwidths as communication paths that substitute for the wired line. A bandwidth reservation line through at least one of the above is constructed. The procedure by which the media adapter device 20 constructs a bandwidth reservation line is the same as in the first embodiment.

  The router device 23 continues to access the Internet 16 by using the bandwidth reservation line constructed by the media adapter device 20.

  In the communication control system 2 according to the present embodiment, even when a failure occurs in the wired line when the router apparatus is connected to the predetermined network via the wired line, the router apparatus is connected to the predetermined network. It can be made accessible continuously. The reason for this is that when the media adapter device 20 connected to the router device 23 is notified by the router device 23 that a failure has occurred in the wired line, the media adapter device 20 is used for securing a bandwidth as a communication path that substitutes for the wired line. This is because a band securing line is established through at least one of the wireless communication terminal apparatuses 12-1 to 12-n.

  The bandwidth of a wired line is generally very wide compared to the bandwidth of a wireless line. Therefore, when the access from the router device 23 to the Internet 16 is switched from the wired line to the wireless line, the communication band may be drastically reduced. The communication control system 2 according to the present embodiment uses a plurality of band securing wireless communication terminal devices from the beginning as a communication path that substitutes for the wired line in order to avoid such a sudden decrease in the band. You may make it construct | assemble the bandwidth reservation line | wire which carried out.

<Second Embodiment>
FIG. 9 is a block diagram conceptually showing the configuration of the communication control system 3 according to the second embodiment.

  The communication control system 3 according to the present embodiment includes a media adapter device 30, a first wireless terminal communication device 31, and second wireless terminal communication devices 32-1 to 32-n.

  The first wireless terminal communication device 31 and the second wireless terminal communication devices 32-1 to 32-n are devices that can be connected to the communication network 36 by wireless lines.

  The media adapter device 30 is connected to the router device 33, the first wireless terminal communication device 31, and the second wireless terminal communication devices 32-1 to 32-n.

  The media adapter device 30 monitors the state of communication performed by the router device 33 via the first wireless communication terminal device 31 connected to the communication network 36. The media adapter device 30 communicates at least one of the second wireless communication terminal devices 32-1 to 32-n not connected to the communication network 36 when the communication state satisfies a predetermined condition. Connect to the network 36. Thus, the media adapter device 30 includes at least one of the second wireless communication terminal devices 32-1 to 32-n in which the router device 33 is connected to the communication network 36 in addition to the first wireless communication terminal device 31. A communication path that can be communicated through is established.

  The communication control system 3 according to the present embodiment can secure a bandwidth necessary for communication between the router device and the predetermined network when the router device is connected to the predetermined network via a wireless line. The reason is that the media adapter device 30 connected to the router device 33 monitors the communication state of the main line via the wireless communication terminal device 31 for normal use, and the communication state of the main line satisfies a predetermined condition. This is because a bandwidth securing line is established via at least one of the bandwidth securing wireless communication terminal devices 32-1 to 32-n.

<Hardware configuration example>
In each of the above-described embodiments, the media adapter devices 10, 20, and 30 shown in FIGS. 1, 8, and 9 can be realized by a dedicated HW (Holdware) (electronic circuit). The media adapter devices 10, 20, and 30 can also be realized by causing a general-purpose HW to execute a software program. An example of the hardware environment in this case will be described with reference to FIG.

  FIG. 10 is a diagram illustrating an exemplary configuration of an information processing apparatus 900 (computer) that can execute the media adapter apparatuses 10, 20, and 30 according to the embodiments of the present invention. 10 is a configuration of a computer (information processing apparatus) capable of realizing the media adapter device 10 shown in FIG. 1, the media adapter device 20 shown in FIG. 8, and the media adapter device 30 shown in FIG. Thus, a hardware environment capable of realizing each function in the above-described embodiment is shown.

The information processing apparatus 900 illustrated in FIG. 10 includes the following as constituent elements.
CPU (Central_Processing_Unit) 901,
ROM (Read_Only_Memory) 902,
RAM (Random_Access_Memory) 903,
-Hard disk (storage device) 904,
A communication interface 905 with an external device,
A reader / writer 908 capable of reading and writing data stored in a recording medium 907 such as a CD-ROM (Compact_Disc_Read_Only_Memory)
-I / O interface 909,
The information processing apparatus 900 is a general computer in which these configurations are connected via a bus 906 (communication line).

  The present invention described using the above-described embodiment as an example supplies a computer program capable of realizing the following functions to the information processing apparatus 900 illustrated in FIG. The function refers to the media adapter devices 10, 20, and 30 in the block configuration diagrams (FIGS. 1, 8, and 9) referred to in the description of the embodiment, or the flowcharts (FIGS. 5A and 5B, FIG. 6 and FIG. 7). The present invention is then achieved by reading the computer program into the hardware CPU 901 for interpretation and execution. The computer program supplied to the apparatus may be stored in a readable / writable volatile memory (RAM 903) or a nonvolatile storage device such as the hard disk 904.

  In the above case, a general procedure can be adopted as a method for supplying the computer program into the hardware. The procedure includes, for example, a method of installing in the apparatus via various recording media 907 such as a CD-ROM, a method of downloading from the outside via a communication line such as the Internet, and the like. In such a case, the present invention can be understood to be configured by a code constituting the computer program or a recording medium 907 in which the code is stored.

  The present invention has been described above using the above-described embodiment as an exemplary example. However, the present invention is not limited to the above-described embodiment. That is, the present invention can apply various modes that can be understood by those skilled in the art within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Communication control system 10 Media adapter apparatus 11 Radio | wireless communication terminal apparatus 12-1 thru | or 12-n for normal use The radio | wireless communication terminal apparatus for band reservation 13 Router apparatus 14 Center side router apparatus 15 Wireless network provider network 16 Internet 2 Communication Control system 20 Media adapter device 23 Router device 25 Cable network operator network 3 Communication control system 30 Media adapter device 31 First wireless communication terminal device 32-1 to 32-n Second wireless communication terminal device 33 Router device 36 Communication Network 400 Packet data 401 Public key of the media adapter device 402 Main line IP address 403 Bandwidth reservation hostname
405 Band reserved line IP address 410 Packet data 411 Public key of center side router device 414 Port number 500 Unique header information 900 Information processing device 901 CPU
902 ROM
903 RAM
904 Hard disk 905 Communication interface 906 Bus 907 Recording medium 908 Reader / writer 909 Input / output interface

Claims (10)

A plurality of wireless communication terminal devices connectable to a communication network by wireless lines;
A media adapter device connected to the router device and the plurality of wireless communication terminal devices;
With
The media adapter device monitors a state of communication performed by the router device via the first wireless communication terminal device connected to the communication network, and the communication state is in a state where a communication band is insufficient. When the condition determined to have occurred is satisfied, the router device is connected to the communication network by connecting at least one second wireless communication terminal device that is not connected to the communication network to the communication network. Establishing a communication path capable of communicating via the second wireless communication terminal device connected to the communication network in addition to the first wireless communication terminal device;
Communication control system. The media adapter device monitors a state of communication performed by the router device via the first wireless communication terminal device connected to the communication network and the one or more second wireless communication terminal devices; As a result of the communication state having a margin in the communication band, if the condition for determining that any of the second wireless terminal devices may be disconnected from the communication network is satisfied, at least one of the above Constructing a communication path by disconnecting the second wireless communication terminal device from the communication network;
The communication control system according to claim 1. When the router device performs IPsec communication, the media adapter device extracts the control system data from the control system data including Rekey, the main system data including ESP packet data, and the IPsec communication data. While inputting to the first wireless communication terminal device, extracting the main body data and inputting to the second wireless communication terminal device,
The communication control system according to claim 1 or 2. A center side router device which is a communication destination of the router device;
The media adapter device has an IP address used by the first and second wireless communication terminal devices when connecting the second wireless communication terminal device to the communication network, and a public key of the media adapter device. Send information to the center side router device,
The center-side router device transmits the public key information of the center-side router device and the port number used for communication via the second wireless communication terminal device to the media adapter device. Authenticating the second wireless communication terminal device;
The communication control system according to claim 3 . When the router device performs IPsec communication with the center side router device, the media adapter device generates the main body data extracted from the IPsec communication data based on the public key information of the center side router device. After generating TCP packet data incorporating the generation key information, the TCP packet data is transmitted to the center router device via the second wireless communication terminal device,
The center side router device includes the main body system included in the TCP packet data based on the generation key information included in the TCP packet data received from the media adapter device via the second wireless communication terminal device. Based on the control system data related to the TCP packet data received via the first wireless communication terminal device, which is associated with the data, and the main system data, the IPsec communication data is received.
The communication control system according to claim 4. The center side router device has a data amount of data received via the first wireless communication terminal device within a predetermined time and a data amount of data received via the individual second wireless communication terminal device. And the data to be transmitted to the router device are distributed to the first wireless communication terminal device and one or more second wireless terminal communication devices based on the ratio,
The communication control system according to claim 4 or 5. The plurality of wireless communication terminal devices can be connected to the communication network via any of a plurality of access points.
The communication control system according to claim 1. When the media adapter device is notified that a failure has occurred in the wired line from the router device connected to the communication network via a wired line, the media adapter device communicates with the second wireless communication terminal device. By connecting to a network, constructing a communication path that replaces the communication path constructed by the wired line,
The communication control system according to claim 1. A plurality of wireless communication terminal devices connectable to a communication network by wireless lines;
A media adapter device connected to the router device and the plurality of wireless communication terminal devices;
In a system comprising:
The media adapter device monitors the state of communication performed by the router device via the first wireless communication terminal device connected to the communication network, and the communication state is in a state where the communication band is insufficient. When the condition determined to have occurred is satisfied, the router device is connected to the communication network by connecting at least one second wireless communication terminal device that is not connected to the communication network to the communication network. Establishing a communication path capable of communicating via the second wireless communication terminal device connected to the communication network in addition to the first wireless communication terminal device;
Communication control method. To the media adapter device connected to the router device and a plurality of wireless communication terminal devices that can be connected to the communication network by wireless lines,
The state of communication performed by the router device via the first wireless communication terminal device connected to the communication network is monitored, and it is determined that the state of communication is in a state where a communication band is insufficient. When the condition is satisfied, the router device connects the first wireless communication device by connecting at least one second wireless communication terminal device that is not connected to the communication network to the communication network. A communication control program for executing processing for establishing a communication path capable of communicating via the second wireless communication terminal device connected to the communication network in addition to the communication terminal device.

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