JP5870170B1 - Relay system, relay method, and computer program - Google Patents

Abstract

To determine a data transmission destination in a relay destination AP. A relay system includes a lower level relay device that communicates with a communication device, and a higher level relay device that relays communication between the lower level relay device and a plurality of networks. The lower level relay device is a communication device. An addition unit for adding network identifier information to transmission data including data transmitted from the network, and a transmission unit for transmitting transmission data to which network identifier information is added to an upper level relay device. Based on the information of the network identifier added to the transmission data transmitted from the lower level relay device, the transmission destination of the transmission data is determined, and the transmission data is controlled according to the control of the transmission control unit and the transmission control unit. And a transmission unit that transmits the message to a transmission destination. [Selection] Figure 2

Description

  The present invention relates to wireless LAN relay technology.

  Conventionally, a method of performing wireless communication between APs in a wireless LAN (Local Area Network; for example, Wi-Fi (registered trademark) (Wireless Fidelity)) has been proposed (for example, see Patent Document 1). For example, WDS (Wireless Distribution System) has been proposed as a technique for performing wireless communication between APs. With this WDS technology, the AP operates in the infrastructure mode, and can perform wireless communication between the APs while communicating with the communication terminal belonging to the AP. Therefore, it is possible to connect a repeater to a place where radio waves do not reach.

  However, the frequency band used for communication with the communication terminal (hereinafter referred to as “communication frequency band”) and the frequency band used for wireless communication between APs (hereinafter referred to as “relay frequency band”) are the same. In the case of the frequency band, the AP cannot use the same frequency band at the same time. Therefore, data transmission is performed by sequential processing, and the throughput of the AP decreases. In order to solve such a problem, conventionally, a plurality of wireless chips of different types of frequency bands (for example, 2.4 GHz band and 5 GHz band) are mounted on the AP, and between APs in a frequency band different from the communication frequency band. Relay processing is performed.

JP 2009-303170 A

  However, when a frequency band different from the communication frequency band is used, data for each SSID (Service Set Identifier) divided in the communication frequency band is collected into one. Therefore, when a frequency band different from the communication frequency band is used for the relay processing, there is a problem that the relay destination AP cannot determine which SSID data is relayed. Therefore, there is a demand for a technique that can determine the data transmission destination in the relay destination AP. Such a problem is not limited to the case where a frequency band different from the communication frequency band is used for the relay processing, and even when the same frequency band as the communication frequency band is used for the relay processing, wireless communication that cannot be relayed for each SSID. This is a problem that occurs between APs having chips.

  In view of the above circumstances, an object of the present invention is to provide a technique capable of determining a data transmission destination in a relay destination AP.

  One aspect of the present invention is a relay system including a lower relay apparatus that communicates with a communication apparatus, and an upper relay apparatus that relays communication between the lower relay apparatus and a plurality of networks, the lower relay An apparatus includes an addition unit that adds network identifier information to transmission data including data transmitted from the communication device, and a transmission unit that transmits transmission data to which the network identifier information is added to the higher-level relay device; The upper relay apparatus determines a transmission destination of the transmission data based on information of the network identifier added to the transmission data transmitted from the lower relay apparatus, and controls transmission of the transmission data A relay system comprising: a transmission control unit; and a transmission unit that transmits the transmission data to a transmission destination according to the control of the transmission control unit.

  One aspect of the present invention is the relay system described above, wherein the transmission control unit removes the added network identifier information before transmitting the transmission data, and the transmission unit includes the network identifier information. The transmission data from which is removed is transmitted to the transmission destination.

  One aspect of the present invention is the relay system described above, wherein the adding unit adds information on a network identifier used for connection by a communication device that is a transmission source of the data to the transmission data.

  One aspect of the present invention is a relay method in a relay system including a lower relay device that communicates with a communication device, and an upper relay device that relays communication between the lower relay device and a plurality of networks, An adding step in which the lower relay apparatus adds network identifier information to transmission data including data transmitted from the communication apparatus; and the lower relay apparatus transmits transmission data to which the network identifier information is added to the upper data. A transmission step of transmitting to a relay device; and the higher-level relay device determines a transmission destination of the transmission data based on information of the network identifier added to the transmission data transmitted from the lower-level relay device, and the transmission A transmission control step for controlling the transmission of data, and the higher-level relay apparatus performs the preceding control according to the control in the transmission control step. A transmission step of transmitting the transmission data to the transmission destination, a relay method having.

  One aspect of the present invention provides a relay system including a lower relay apparatus that communicates with a communication apparatus and an upper relay apparatus that relays communication between the lower relay apparatus and a plurality of networks. A computer program for operating a corresponding first computer and a second computer corresponding to the higher-level relay device, the transmission data including data transmitted from the communication device to the first computer An adding step for adding information on the network identifier; and a transmission step for transmitting the transmission data to which the information on the network identifier is added to the higher-level relay device, and causing the second computer to execute the lower-level relay device. The transmission based on the information of the network identifier added to the transmission data transmitted from A computer program for determining a data transmission destination and executing a transmission control step for controlling transmission of the transmission data and a transmission step for transmitting the transmission data to the transmission destination according to the control in the transmission control step It is.

  According to the present invention, it is possible to determine the data transmission destination in the relay destination AP.

It is a figure which shows the system configuration | structure of the relay system 100 in this invention. 3 is a schematic block diagram illustrating a functional configuration of a lower relay apparatus 10. FIG. It is a figure which shows the specific example of a child identification information database. 3 is a schematic block diagram showing a functional configuration of a higher-level relay device 20. FIG. It is a figure which shows the specific example of a parent identification information database. It is a figure showing the specific example of the frame format of the information addition frame in this invention. 4 is a flowchart showing a flow of processing of a lower relay apparatus 10. 3 is a flowchart showing a processing flow of a higher-level relay device 20. FIG. 6 is a sequence diagram illustrating a processing flow of the relay system 100.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a system configuration of a relay system 100 according to the present invention. The relay system 100 of the present invention includes a lower relay device 10 and an upper relay device 20. Communication devices 30-1 to 30 -N (N is an integer of 2 or more) are connected to the lower relay device 10. The lower relay apparatus 10 and the upper relay apparatus 20 are connected to be communicable by the WDS function.
In the following description, the communication devices 30-1 to 30-N will be described as the communication device 30 unless otherwise distinguished.

  The lower relay apparatus 10 is a wireless LAN access point. The lower relay apparatus 10 performs communication relay processing between the upper relay apparatus 20 and the communication apparatus 30 by WDS connection. A plurality of SSIDs (Service Set Identifiers) (network identifiers) are set in the lower relay apparatus 10. Further, the lower relay apparatus 10 can perform communication using a plurality of frequency bands (for example, 2.4 GHz band and 5 GHz band).

  The upper relay device 20 is a wireless LAN access point. The upper relay apparatus 20 performs a relay process between the lower relay apparatus 10 and the SSID NW 50 (50-1 to 50-n (n is an integer of 2 or more)). For example, the upper relay device 20 receives transmission data transmitted from the lower relay device 10, and selects a network (for example, any one of the SSID NWs 50-1 to 50-n) as a transmission destination of the received transmission data. Determine. Then, the upper relay device 20 transmits the transmission data to the destination network via the network 40. Further, the upper relay apparatus 20 can perform communication using a specific frequency band (for example, 2.4 GHz band or 5 GHz band).

The communication device 30 is configured using an information processing device such as a smartphone, a tablet device, a mobile phone, a notebook computer, a personal computer, or a game machine. The communication device 30 communicates with the lower relay device 10. For example, the communication device 30 transmits the transmission data to the lower relay device 10.
The network 40 may be a network configured in any way. For example, the network 40 may be configured using the Internet.
The SSID NW 50 is a network that provides individual services for each SSID.

FIG. 2 is a schematic block diagram illustrating a functional configuration of the lower relay apparatus 10.
The lower relay apparatus 10 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus, and executes a relay program. By executing the relay program, the lower level relay device 10 functions as a device including the wireless chip 101, the identification unit 102, the identification information storage unit 103, the SSID information addition unit 104, the wireless chip 105, and the communication control unit 106. Note that all or part of each function of the lower level relay apparatus 10 may be realized using hardware such as an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). . The relay program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. Further, the relay program may be transmitted / received via a telecommunication line.

The wireless chip 101 is an IC chip for wireless LAN. The wireless chip 101 makes a specific frequency band (for example, 2.4 GHz band) available as a communication frequency band. The wireless chip 101 functions as the first communication unit 1011. The first communication unit 1011 performs communication with the communication device 30. For example, the first communication unit 1011 receives transmission data from the communication device 30.
The identification unit 102 identifies the SSID that the communication device 30 that is the transmission source of the transmission data received by the first communication unit 1011 uses for connection.

The identification information storage unit 103 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The identification information storage unit 103 stores a child identification information database. The child identification information database is composed of records including identification information (hereinafter referred to as “identification information records”).
The SSID information adding unit 104 adds information of the SSID identified by the identifying unit 102 (hereinafter referred to as “SSID information”) to the transmission data received by the first communication unit 1011.

The wireless chip 105 is an IC chip for wireless LAN. The wireless chip 105 can use a frequency band (for example, 5 GHz band) different from the wireless chip 101 as a relay frequency band. The wireless chip 105 functions as the second communication unit 1051. The second communication unit 1051 performs communication with the upper relay device 20. The second communication unit 1051 transmits, for example, transmission data to which SSID information is added (hereinafter referred to as “information addition frame”) to the higher-level relay device 20.
The communication control unit 106 controls communication of the first communication unit 1011. For example, the communication control unit 106 is stored in the identification information storage unit 103 and the identification information (for example, the MAC address of the communication device 30) of the communication device 30 that is the transmission destination of the data received by the second communication unit 1051. Based on the child identification information database, the first communication unit 1011 is controlled to transmit data to the transmission destination.

  FIG. 3 is a diagram showing a specific example of the child identification information database. The child identification information database has a plurality of identification information records 60. The identification information record 60 has STA_MAC, SSID, and time stamp values. The value of STA_MAC represents the MAC address of the communication device 30 that is the transmission data transmission source. The SSID value represents a network identification name used for connection by the communication device 30 identified by the STA_MAC in the same identification information record 60. The time stamp represents the time at which the lower relay apparatus 10 received the transmission data from the communication apparatus 30 identified by the STA_MAC of the same identification information record 60.

  In the example shown in FIG. 3, a plurality of STA_MACs are recorded in the child identification information database. In FIG. 3, the identification information record 60 recorded at the top of the child identification information database has an STA_MAC value of “AAA”, an SSID value of “SSID1”, and a timestamp value of “YY / MM / D1”. It is. That is, the SSID used for connection by the communication device 30 identified by the STA_MAC “AAA” is “SSID1”, and the time when the lower level relay device 10 receives the transmission data from the communication device 30 is “YY / MM”. / D1 ".

FIG. 4 is a schematic block diagram showing the functional configuration of the upper relay device 20.
The upper relay device 20 includes a CPU, a memory, an auxiliary storage device, and the like connected by a bus, and executes a relay program. By executing the relay program, the higher-level relay device 20 functions as a device including the wireless chip 201, the reading unit 202, the identification information storage unit 203, the transmission control unit 204, the wireless chip 205, and the communication control unit 206. Note that all or part of the functions of the higher-level relay device 20 may be realized using hardware such as an ASIC, PLD, or FPGA. The relay program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. Further, the relay program may be transmitted / received via a telecommunication line.

The wireless chip 201 is an IC chip for wireless LAN. The wireless chip 201 makes a specific frequency band (for example, 5 GHz band) available as a relay frequency band. The wireless chip 201 functions as the first communication unit 2011. The first communication unit 2011 communicates with the lower relay apparatus 10. The first communication unit 2011 receives an information addition frame from, for example, the lower relay apparatus 10.
The reading unit 202 reads the information addition frame received by the first communication unit 2011. Specifically, the reading unit 202 acquires SSID information from the information addition frame.

The identification information storage unit 203 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The identification information storage unit 203 stores a parent identification information database. The parent identification information database is composed of identification information records.
The transmission control unit 204 controls communication of the wireless chip 205. Based on the SSID information acquired by the reading unit 202, the transmission control unit 204 causes the SSID NW 50 corresponding to the SSID specified by the SSID information to transmit the transmission data from which the SSID information is removed.

The wireless chip 205 is an IC chip for wireless LAN. The wireless chip 205 enables communication using a specific frequency band (for example, 5 GHz band). The wireless chip 205 functions as the second communication unit 2051. The second communication unit 2051 transmits transmission data to a network that is a transmission destination according to the control of the transmission control unit 204. The second communication unit 2051 receives data addressed to the communication device 30 via the network 40.
The communication control unit 206 controls communication of the first communication unit 2011. For example, the communication control unit 206 transmits data to the lower-level relay apparatus 10 that is a relay destination of data based on the data received by the second communication unit 2051 and the parent identification information database stored in the identification information storage unit 203. Let

  FIG. 5 is a diagram showing a specific example of the parent identification information database. The parent identification information database has a plurality of identification information records 70. The identification information record 70 has values of STA_MAC, AP_MAC, SSID information, and time stamp. The value of STA_MAC represents the MAC address of the communication device 30 that is the transmission data transmission source. The value of AP_MAC represents the MAC address of the lower relay apparatus 10 that is the transmission source of the information addition frame. The value of the SSID information represents the SSID added to the information addition frame from the lower relay apparatus 10 identified by the AP_MAC of the same identification information record 70. The time stamp value represents the time at which the higher-level relay device 20 has received the information addition frame from the lower-level relay device 10 identified by the AP_MAC of the same identification information record 70.

  In the example shown in FIG. 5, a plurality of STA_MACs are recorded in the parent identification information database. In FIG. 5, the identification information record 70 recorded at the top of the parent identification information database has an STA_MAC value of “AAA”, an AP_MAC value of “CCC”, an SSID information value of “SSID1”, and a time stamp. The value is “YY / MM / D3”. That is, the SSID used for connection by the communication device 30 identified by the STA_MAC “AAA” is “SSID1”, and the time when the information addition frame is received from the lower level relay device 10 identified by the AP_MAC “CCC” is “ YY / MM / D3 ″ is indicated.

FIG. 6 is a diagram showing a specific example of the frame format of the information addition frame in the present invention.
The information addition frame has fields for storing frame control, duration, first address, second address, third address, sequence control, fourth address, SSID information, and payload values. Two fields of ToDS (To Distribution System) and FromDS (To Distribution System) are stored in the frame control field. In the ToDS field, a value indicating whether the receiving station is a base station (for example, the lower relay apparatus 10 or the upper relay apparatus 20) or a communication terminal (communication apparatus 30) is stored. For example, when the receiving station is a base station, “1” is stored in the ToDS field. For example, when the receiving station is a communication terminal, “0” is stored in the ToDS field. In the FromDS field, a value indicating whether the transmitting station is a base station or a communication terminal is stored. For example, when the transmitting station is a base station, “1” is stored in the FromDS field. For example, when the transmitting station is a communication terminal, “0” is stored in the FromDS field.

The duration field stores information on the scheduled period of using radio waves. The scheduled period represents time required for frame transmission.
In the field for storing the four values of the first address to the fourth address, different values are stored depending on the use status such as WDS and infrastructure mode. The values stored in the four fields are, for example, RA (Receiver Address), TA (Transmitter Address), DA (Destination Address), SA (Source Address), and BSSID (Basic Service Set Identifier). The value of RA represents the MAC address of the next transfer destination base station. The value of TA represents the MAC address of the transfer source base station. The value of DA represents the destination MAC address. The value of SA represents the source MAC address. The value of BSSID represents a number for identifying the BSS.

The sequence control field stores information on the sequence number of data to be transmitted or fragment number when fragmented.
In the SSID information field, information on the SSID used for connection by the communication device 30 that is the transmission data transmission source is stored. The SSID information field is added by the SSID information adding unit 104 of the lower level relay apparatus 10.
The payload field mainly stores data that the user operating the communication terminal wants to transmit.

FIG. 7 is a flowchart showing a processing flow of the lower level relay apparatus 10.
The identification unit 102 determines whether transmission data is received via the first communication unit 1011 (step S101). When the transmission data is not received (step S101—NO), the lower relay apparatus 10 ends the process.
On the other hand, when the transmission data is received (step S101—YES), the identification unit 102 identifies the SSID used for connection by the communication device 30 that is the transmission data transmission source. The identifying unit 102 outputs the identified SSID information to the SSID information adding unit 104. The SSID information adding unit 104 adds the SSID information output from the identifying unit 102 to the transmission data (step S102). By this processing, an information addition frame is generated. The second communication unit 1051 transmits the information addition frame to the upper relay device 20 (step S103).

FIG. 8 is a flowchart showing the flow of processing of the higher-level relay device 20.
The first communication unit 2011 receives the information addition frame transmitted from the lower relay apparatus 10 (step S201). The reading unit 202 reads the received information addition frame (step S202). Specifically, the reading unit 202 acquires the SSID information and the MAC address information of the communication device 30 from the information addition frame. The reading unit 202 associates the time information when the information addition frame is received, the MAC address of the lower level relay device 10 that is the transmission source of the information addition frame, the acquired SSID information, and the MAC address information of the communication device 30. And recorded in the identification information storage unit 203 (step S203).

  The transmission control unit 204 removes the SSID information from the information addition frame (step S204). Thereafter, the transmission control unit 204 controls the second communication unit 2051 to transmit transmission data to a network (SSID NW50) corresponding to the SSID specified by the SSID information. The second communication unit 2051 performs transmission data distribution processing according to the control of the transmission control unit 204 (step S205). Specifically, the second communication unit 2051 transmits the transmission data to the network that is the transmission destination of the transmission data.

FIG. 9 is a sequence diagram illustrating a processing flow of the relay system 100.
In the relay system 100 in the description of FIG. 9, the number of communication devices belonging to the lower relay device 10 is one (communication device 30). The communication device 30 is connected to the lower level relay device 10 using SSID2.
The communication device 30 transmits the transmission data to the lower relay device 10 (step S301). The first communication unit 1011 of the lower relay apparatus 10 receives the transmission data transmitted from the communication apparatus 30 (step S302). The identification unit 102 identifies the SSID used for connection by the communication device 30 that is the transmission source of the received transmission data. By this processing, the identification unit 102 acquires SSID information (for example, SSID 2). Further, the identification unit 102 acquires information on the MAC address of the communication device 30 from the transmission data. Further, the identification unit 102 also acquires time information when the transmission data is received. The identification unit 102 records the acquired information in association with the child identification information database stored in the identification information storage unit 103 (step S303). If the MAC address of the communication device 30 included in the acquired information is already recorded before recording information in the child identification information database, the identification unit 102 overwrites the information recorded in advance with the acquired information. To update the child identification information database. However, when the acquired information matches the information recorded in advance in the child identification information database in specific items (STA_MAC and SSID), the identification unit 102 does not update the child identification information database.

  The identification unit 102 outputs the transmission data and the SSID information to the SSID information addition unit 104. The SSID information adding unit 104 adds the output SSID information (for example, SSID 2) to the transmission data (step S304). By this processing, an information addition frame is generated. Thereafter, the second communication unit 1051 transmits the generated information addition frame to the higher-level relay device 20 (step S305).

  The first communication unit 2011 of the upper relay device 20 receives the information addition frame transmitted from the lower relay device 10 (step S306). The first communication unit 2011 outputs the received information addition frame to the reading unit 202. The reading unit 202 acquires SSID information (for example, SSID2), the MAC address of the transmission source communication device 30 and the MAC address of the lower level relay device 10 of the transfer source from the received information addition frame. Further, the reading unit 202 also acquires information on the time when the information addition frame is received. The reading unit 202 records the acquired information in association with the parent identification information database stored in the identification information storage unit 203 (step S307). If the MAC address of the communication device 30 included in the acquired information is already recorded before the information is recorded in the parent identification information database, the reading unit 202 overwrites the information recorded in advance with the acquired information. To update the parent identification information database. However, when the acquired information matches information recorded in advance in the parent identification information database in specific items (STA_MAC, AP_MAC, and SSID information), the reading unit 202 does not update the parent identification information database.

  The reading unit 202 outputs the information addition frame to the transmission control unit 204. The transmission control unit 204 removes the SSID information from the output information addition frame and outputs it to the second communication unit 2051 (step S308). The transmission control unit 204 controls the second communication unit 2051 to transmit the transmission data from which the SSID information is removed from the information addition frame, to the network (SSID NW50-2) corresponding to the SSID (for example, SSID2) specified by the SSID information. ). The second communication unit 2051 transmits the transmission data to the SSID NW 50-2 according to the control of the transmission control unit 204 (step S309).

  The second communication unit 2051 of the higher-level relay device 20 receives data from the SSID NW 50-2 (Step S310). Second communication unit 2051 outputs the received data to communication control unit 206. The communication control unit 206 determines a data transfer destination based on the output data and the parent identification information database stored in the identification information storage unit 203. Specifically, first, the communication control unit 206 reads the parent identification information database stored in the identification information storage unit 203. Next, the communication control unit 206 selects the identification information record 70 corresponding to the SSID of the network that is the transmission source of the received data among the identification information records 70 that constitute the read parent identification information database. Then, the communication control unit 206 determines the address information recorded in the AP_MAC item of the selected identification information record 70 as the data transfer destination lower level relay apparatus 10. The first communication unit 2011 transmits data to the determined lower level relay apparatus 10 (step S311).

  The second communication unit 1051 of the lower relay apparatus 10 receives data from the upper relay apparatus 20. Second communication unit 1051 outputs the received data to communication control unit 106. The communication control unit 106 determines a data transmission destination based on the output data and the child identification information database stored in the identification information storage unit 103. Specifically, first, the communication control unit 106 reads a child identification information database stored in the identification information storage unit 103. Next, the communication control unit 106 selects the identification information record 60 corresponding to the MAC address of the communication device 30 that is the transmission destination of the received data among the identification information records 60 that constitute the read child identification information database. . And the communication control part 106 acquires the information of SSID currently recorded on the item of SSID of the selected identification information record 60. FIG. The communication control unit 106 controls the first communication unit 2011 to transmit data to the communication device 30 that uses the SSID indicated by the acquired SSID information. The 1st communication part 2011 transmits data to the communication apparatus 30 according to control of the communication control part 206 (step S312).

  According to the relay system 100 configured as described above, the data transmission destination can be determined by the relay destination AP (upper relay apparatus 20). Specifically, the lower relay apparatus 10 adds SSID information indicating the SSID used for connection by the communication apparatus 30 to the transmission data. Based on the SSID information added by the lower relay apparatus 10, the upper relay apparatus 20 can grasp which SSID is used to transmit the transmitted data. Therefore, it becomes possible to determine the data transmission destination in the relay destination AP (upper relay apparatus 20).

  Further, in the present invention, before the upper relay device 20 transmits the transmission data to the network corresponding to the SSID, the SSID information added by the lower relay device 10 is removed from the header of the information addition frame. Therefore, data that is unnecessary information (SSID information) added to other devices (devices other than the lower relay device 10 and the upper relay device 20) is not transmitted to the other devices. Therefore, it is possible to reduce the possibility that another device that has received the transmission data cannot correctly decode the transmission data due to the addition of the SSID information.

  Further, conventionally, with respect to the problem that it is not possible to determine which SSID data is relayed in the relay destination AP, it is possible to create and associate an SSID similar to the communication frequency band in the relay frequency band. It was done. However, since the number of SSIDs generated is limited depending on the performance of the wireless chip, there is a problem that the SSID cannot be used for other services. On the other hand, in the relay system 100 according to the present invention, the lower relay apparatus 10 adds SSID information indicating the SSID used for connection by the communication apparatus 30 to the transmission data and transmits it to the upper relay apparatus 20 that is the relay destination. Therefore, it is not necessary to create an SSID similar to the communication frequency band in the relay frequency band (frequency band used between the lower relay apparatus 10 and the upper relay apparatus 20). Therefore, the consumption of SSID in the relay frequency band can be minimized.

<Modification>
In the present embodiment, the configuration in which the relay system 100 includes one lower level relay device 10 is shown, but the relay system 100 may be configured to include a plurality of lower level relay devices 10.
Further, in the present embodiment, the case where different frequency bands are used for the relay frequency band and the communication frequency band has been described as an example, but the relay system 100 according to the present invention has the same frequency in the relay frequency band and the communication frequency band. This is applicable even when a band is used. For example, the relay system 100 according to the present invention can also be applied to communication between APs having wireless chips that cannot be relayed for each SSID.

In the present embodiment, the low-order relay device 10 is configured to generate the information addition frame every time transmission data is received from the communication device 30. However, the present invention is not limited to this. For example, the lower relay apparatus 10 may add the SSID information only to the transmission data received first after connection from the communication apparatus 30 when the SSID used for connection by the communication apparatus 30 changes. In this case, when the identification unit 102 newly records information or updates information in the child identification information database stored in the identification information storage unit 103, in addition to transmission data and SSID information, New connection information indicating that the connection is secure is output to the SSID information adding unit 104. When the new connection information is output, the SSID information adding unit 104 adds the SSID information to the transmission data. On the other hand, when the new connection information is not output, the SSID information adding unit 104 does not add the SSID information to the transmission data.
With this configuration, the lower relay apparatus 10 does not need to add SSID information every time transmission data is received. Therefore, the processing load on the lower relay apparatus 10 can be reduced.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Lower relay apparatus, 20 ... Upper relay apparatus, 30 ... Communication apparatus, 40 ... Network, 50 (50-1-50-n) ... SSID NW, 101 ... Wireless chip, 1011 ... 1st communication part, 102 ... Identification 103: Identification information storage unit, 104 ... SSID information addition unit, 105 ... Wireless chip, 1051 ... Second communication unit, 106 ... Communication control unit, 201 ... Wireless chip, 2011 ... First communication unit, 202 ... Reading unit , 203 ... Identification information storage unit, 204 ... Transmission control unit, 205 ... Wireless chip, 2051 ... Second communication unit, 206 ... Communication control unit

Claims (6)

A relay system comprising a lower relay device that communicates with a communication device, and an upper relay device that relays communication between the lower relay device and a plurality of networks,
The lower relay device is
An adding unit for adding information of a network identifier to transmission data including data transmitted from the communication device;
A transmission unit that transmits transmission data to which the information of the network identifier is added to the higher-level relay device;
With
The upper relay device is
A transmission control unit that determines a transmission destination of the transmission data based on information of the network identifier added to the transmission data transmitted from the lower-level relay device, and controls transmission of the transmission data;
A transmission unit that transmits the transmission data to a transmission destination according to the control of the transmission control unit;
Equipped with a,
The transmission control unit removes the added network identifier information before transmitting the transmission data,
And the transmission unit, the relay system that transmits transmission data information of the network identifier has been removed to the destination. A relay system comprising a lower relay device that communicates with a communication device, and an upper relay device that relays communication between the lower relay device and a plurality of networks,
The lower relay device is
An adding unit for adding information of a network identifier to transmission data including data transmitted from the communication device;
A transmission unit that transmits transmission data to which the information of the network identifier is added to the higher-level relay device;
With
The upper relay device is
A transmission control unit that determines a transmission destination of the transmission data based on information of the network identifier added to the transmission data transmitted from the lower-level relay device, and controls transmission of the transmission data;
A transmission unit that transmits the transmission data to a transmission destination according to the control of the transmission control unit;
Equipped with a,
The adding unit relay system that adds information of the network identifier the a data transmission source communication device is used for connection to the transmission data. A relay method in a relay system comprising: a lower relay device that communicates with a communication device; and an upper relay device that relays communication between the lower relay device and a plurality of networks,
An adding step in which the lower-level relay device adds network identifier information to transmission data including data transmitted from the communication device;
The lower relay device transmits transmission data to which the network identifier information is added to the upper relay device; and
A transmission control step in which the upper relay apparatus determines a transmission destination of the transmission data based on information of the network identifier added to the transmission data transmitted from the lower relay apparatus, and controls transmission of the transmission data When,
The upper relay device transmits the transmission data to a transmission destination according to the control in the transmission control step;
I have a,
In the transmission control step, before the transmission data is transmitted, the information of the added network identifier is removed,
In the transmitting step, the relay method to transmit data information network identifier has been removed that sends to the destination. A relay method in a relay system comprising: a lower relay device that communicates with a communication device; and an upper relay device that relays communication between the lower relay device and a plurality of networks,
An adding step in which the lower-level relay device adds network identifier information to transmission data including data transmitted from the communication device;
The lower relay device transmits transmission data to which the network identifier information is added to the upper relay device; and
A transmission control step in which the upper relay apparatus determines a transmission destination of the transmission data based on information of the network identifier added to the transmission data transmitted from the lower relay apparatus, and controls transmission of the transmission data When,
The upper relay device transmits the transmission data to a transmission destination according to the control in the transmission control step;
I have a,
A relay method in which, in the adding step, information of a network identifier used for connection by a communication device that is a transmission source of the data is added to the transmission data . As a relay system comprising a lower relay device that communicates with a communication device, and an upper relay device that relays communication between the lower relay device and a plurality of networks, a first computer corresponding to the lower relay device, and A computer program for operating a second computer corresponding to the upper relay device,
For the first computer,
An adding step of adding network identifier information to transmission data including data transmitted from the communication device;
A transmission step of transmitting transmission data to which the information of the network identifier is added to the higher-level relay device;
And execute
For the second computer,
A transmission control step of determining a transmission destination of the transmission data based on information of the network identifier added to the transmission data transmitted from the lower relay apparatus, and controlling transmission of the transmission data;
In accordance with the control in the transmission control step, a transmission step of transmitting the transmission data to a transmission destination;
Was executed,
In the transmission control step, before the transmission data is transmitted, the information of the added network identifier is removed,
Wherein in the transmission step, transmitting to order the computer program transmission data information of the network identifier has been removed to the destination. As a relay system comprising a lower relay device that communicates with a communication device, and an upper relay device that relays communication between the lower relay device and a plurality of networks, a first computer corresponding to the lower relay device, and A computer program for operating a second computer corresponding to the upper relay device,
For the first computer,
An adding step of adding network identifier information to transmission data including data transmitted from the communication device;
A transmission step of transmitting transmission data to which the information of the network identifier is added to the higher-level relay device;
And execute
For the second computer,
A transmission control step of determining a transmission destination of the transmission data based on information of the network identifier added to the transmission data transmitted from the lower relay apparatus, and controlling transmission of the transmission data;
In accordance with the control in the transmission control step, a transmission step of transmitting the transmission data to a transmission destination;
Was executed,
Wherein in adding step, the data addition to because of a computer program information network identifier which is the source communication device is used for connection to the transmission data.

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