JP2014007590A - Radio communication system, radio terminal device, base station device, and communication control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly limit a radio terminal which can connect to a network.SOLUTION: A radio terminal device comprises a position information acquisition unit and a transmission unit. The position information acquisition unit acquires position information indicating a position of the radio terminal device. The transmission unit attaches the position information to connection request for requesting connection with a network, and transmits the connection request with the position information to a base station device. The base station device comprises a storage unit, a reception unit, and a connection control unit. The storage unit stores a communication permissible range for a position indicated by position information in which communication between the network and the radio terminal device is permitted. The reception unit receives the connection request transmitted from the radio terminal device. The connection control unit determines whether the position of the radio terminal device indicated by the position information attached to the received connection request is in the communication permissible range, if the position of the radio terminal device indicated by the position information is in the communication permissible range, transmits a connection permission response for permitting connection with the network to the radio terminal device, and if the position of the radio terminal device indicated by the position information is out of the communication permissible range, cancels transmission of the connection permission response.

Description

  The present invention relates to a wireless communication system, a wireless terminal device, a base station device, and a communication control method.

  With the spread of wireless terminal devices (hereinafter referred to as “wireless terminals”) capable of data communication with a network called a wireless local area network (LAN), wireless LAN communication spots are being prepared. A wireless LAN base station apparatus (hereinafter referred to as “base station”) called an access point is installed at each communication spot of the wireless LAN. The base station provides a connection to the wireless LAN. The wireless terminal performs connection to the wireless LAN through such a base station.

  Conventionally, when a wireless terminal enters a radio wave reach from a base station, an SSID (Service Set Identifier) included in a beacon signal transmitted from the base station, and an SSID preset in the wireless terminal Authentication (authentication processing) is performed to determine whether or not the two match. Only the wireless terminal for which the authentication process has been established is permitted to connect to the wireless LAN, and thereafter, data communication between the wireless LAN and the wireless terminal is started.

JP 2011-130076 A

  However, in the above-described conventional technology, there is a possibility that the connection from the wireless terminal to the wireless LAN is permitted as long as the wireless terminal enters the radio wave reach from the base station. For example, authentication processing is performed when the wireless terminal enters the radio wave reach from the base station, and when this authentication processing is successful, connection from the wireless terminal to the wireless LAN is permitted. In this case, the number of wireless terminals that can be connected to the wireless LAN may increase without limit. An excessive increase in the number of wireless terminals that can be connected to the wireless LAN is not preferable from the viewpoint of maintaining the security of the wireless LAN.

  The disclosed technology has been made in view of the above, and provides a wireless communication system, a wireless terminal device, a base station device, and a communication control method capable of appropriately limiting wireless terminals that can be connected to a network. With the goal.

  The radio | wireless communications system which this application discloses has the base station apparatus which provides the connection to a network, and the radio | wireless terminal apparatus which connects to the said network via the said base station apparatus in one aspect. The wireless terminal device includes a position information acquisition unit and a transmission unit. The position information acquisition unit acquires position information indicating the position of the wireless terminal device. The transmitting unit adds the position information to a connection request for requesting connection to the network, and transmits the request to the base station apparatus. The base station apparatus includes a storage unit, a receiving unit, and a connection control unit. The storage unit stores a communication allowable range that is a range of the position information in which communication between the network and the wireless terminal device is permitted. The receiving unit receives the connection request transmitted from the wireless terminal device. The connection control unit determines whether the position information added to the received connection request belongs to the communication allowable range, and the position of the wireless terminal device based on the position information is within the communication allowable range. If it belongs, a connection permission response permitting connection to the network is returned to the wireless terminal device, and if the position of the wireless terminal device based on the location information does not belong to the communication allowable range, the connection Cancel reply of permission response.

  According to one aspect of the wireless communication system disclosed in the present application, it is possible to appropriately limit wireless terminals that can be connected to the network.

FIG. 1 is a diagram illustrating a configuration example of a wireless communication system according to the present embodiment. FIG. 2 is a diagram illustrating a configuration example of a wireless terminal in the present embodiment. FIG. 3 is a diagram illustrating an example of the format of a connection request frame and a data request frame. FIG. 4 is a diagram illustrating a configuration example of the base station in the present embodiment. FIG. 5 is a diagram illustrating an example of information on the allowable communication range stored in the storage unit. FIG. 6 is a sequence diagram illustrating a processing procedure of a communication allowable range registration process performed by the wireless communication system according to the present embodiment. FIG. 7 is a sequence diagram illustrating a processing procedure of communication processing before connection by the wireless communication system according to the present embodiment. FIG. 8 is a sequence diagram illustrating a processing procedure of post-connection communication processing by the wireless communication system according to the present embodiment. FIG. 9 is a hardware configuration diagram of the wireless terminal. FIG. 10 is a hardware configuration diagram of the base station.

  Embodiments of a wireless communication system, a wireless terminal device, a base station device, and a communication control method disclosed in the present application will be described below in detail with reference to the drawings. The disclosed technology is not limited by this embodiment.

  FIG. 1 is a diagram illustrating a configuration example of a wireless communication system according to the present embodiment. As illustrated in FIG. 1, the wireless communication system according to the present embodiment includes wireless terminals 10 a and 10 b, a base station 20, and a network 30. The network 30 is a communication network constructed by a plurality of computers or the like, and is a wireless LAN, for example.

  The base station 20 is installed at each communication spot of the network 30 and provides a connection to the network 30 to the wireless terminals 10a and 10b.

  The wireless terminals 10 a and 10 b connect to the network 30 via the base station 20. For example, when the radio terminals 10 a and 10 b enter the radio wave arrival range 21 from the base station 20, the radio terminals 10 a and 10 b transmit a connection request for requesting connection to the network 30 to the base station 20. According to the wireless LAN specification of IEEE 802.11, the connection request is defined as Probe Request. Below, when not distinguishing each of radio | wireless terminal 10a, 10b in particular, these are collectively called "radio | wireless terminal 10."

  The wireless terminal 10 acquires position information indicating the position of the wireless terminal 10. In the present embodiment, the wireless terminal 10 acquires the position coordinates of the wireless terminal 10 as position information using a GPS (Global Positioning System) function or the like. Then, the wireless terminal 10 adds position coordinates to the connection request and transmits a connection request with the position coordinates added to the base station 20.

  On the other hand, the base station 20 stores in advance in a predetermined storage unit information on a communication allowable range 22 that is a range of position coordinates in which communication between the network 30 and the wireless terminal 10 is allowed. The communication allowable range 22 is set to a range narrower than the radio wave reachable range 21 from the base station 20, for example. The base station 20 receives the connection request transmitted from the wireless terminal 10. The base station 20 determines whether or not the position coordinates added to the received connection request belong to the communication allowable range 22 stored in the predetermined storage unit.

  When the position coordinates belong to the communication allowable range 22, the base station 20 returns a connection permission response for permitting connection to the network 30 to the wireless terminal 10. On the other hand, when the position coordinates do not belong to the communication allowable range 22, the base station 20 stops returning the connection permission response. In the example shown in FIG. 1, since the position coordinates indicating the position of the wireless terminal 10a belong to the communication allowable range 22, the base station 20 returns a connection permission response to the wireless terminal 10a. On the other hand, since the position coordinates indicating the position of the wireless terminal 10b do not belong to the communication allowable range 22, the base station 20 stops returning the connection permission response to the wireless terminal 10b. According to the wireless LAN specification of IEEE 802.11, the connection permission response is defined as Probe Response.

  As described above, in the wireless communication system according to the present embodiment, the communication allowable range 22 in which the base station 20 stores the position coordinates of the wireless terminal 10 added to the connection request received from the wireless terminal 10 in a predetermined storage unit in advance. If it does not belong to the category, the response of the connection permission response is canceled. For this reason, even when the radio terminal 10 enters the radio wave reachable range 21 from the base station 20, the base station 20 determines from the radio terminal 10 if the position coordinates of the radio terminal 10 do not belong to the communication allowable range 22. Connection to the network 30 can be rejected. Thereby, it is possible to avoid an excessive increase in the number of wireless terminals that can be connected to the network 30.

  Next, the configuration of the wireless terminal 10 shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a diagram illustrating a configuration example of a wireless terminal in the present embodiment. As illustrated in FIG. 2, the wireless terminal 10 includes a wireless control unit 101, an external I / F control unit 102, a position information acquisition unit 103, and a signal transmission unit 104. In addition, the wireless terminal 10 includes an antenna connected to the wireless control unit 101.

  The radio control unit 101 controls radio communication between the radio terminal 10 and the base station 20. The radio control unit 101 receives an instruction to transmit the position coordinates of the radio terminal 10 from the base station 20 via the antenna. The wireless control unit 101 outputs an instruction to transmit the received position coordinates to the position information acquisition unit 103.

  In addition, the wireless control unit 101 receives an input of the position coordinates of the wireless terminal 10 from the position information acquisition unit 103, and transmits the received position coordinates to the base station 20 via the antenna.

  In addition, the wireless control unit 101 receives an input of a connection request from the signal transmission unit 104. Radio control section 101 transmits the accepted connection request to base station 20 via the antenna.

  In addition, the wireless control unit 101 receives a reply of the connection permission response from the base station 20 via the antenna. Radio control section 101 outputs the received connection permission response to signal transmission section 104.

  In addition, the wireless control unit 101 receives an input of a data request from the signal transmission unit 104. The data request is a signal that the wireless terminal 10 requests the base station 20 to transmit data after the connection to the network 30 is established. According to the wireless LAN specification of IEEE 802.11, the connection request is defined as PS-Poll (Power Save-Poll). The radio control unit 101 transmits the accepted data request to the base station 20 via the antenna.

  The external I / F control unit 102 controls wired communication between the wireless terminal 10 and the external device. The external I / F control unit 102 receives an instruction to transmit the position coordinates of the wireless terminal 10 from the base station 20 via a cable (not shown) such as a LAN cable. The external I / F control unit 102 outputs an instruction to transmit the received position coordinates to the position information acquisition unit 103.

  In addition, the external I / F control unit 102 receives an input of the position coordinates of the wireless terminal 10 from the position information acquisition unit 103 and transmits the received position coordinates of the wireless terminal 10 to the base station 20 via a cable.

  The position information acquisition unit 103 acquires position coordinates indicating the position of the wireless terminal 10 (hereinafter referred to as “position coordinates of the wireless terminal 10” as appropriate). For example, the position information acquisition unit 103 includes a GPS function that can acquire position information from a GPS (Global Positioning System) satellite, and acquires the position coordinates of the wireless terminal 10 using this GPS function. Further, for example, the position information acquisition unit 103 can also acquire the position information of the wireless terminal 10 using the position information received from a predetermined input unit operated by the user. The position information acquisition unit 103 outputs the acquired position coordinates of the wireless terminal 10 to the signal transmission unit 104. As the position information, other information indicating the position of the wireless terminal 10 such as a distance and direction from an arbitrary reference point can be used in addition to the position coordinates.

  Further, the position information acquisition unit 103 receives the connection request transmission timing from the signal transmission unit 104. The position information acquisition unit 103 acquires the position coordinates of the wireless terminal 10 at a timing before the transmission timing of the received connection request, and outputs the acquired position coordinates of the wireless terminal 10 to the signal transmission unit 104.

  Further, the position information acquisition unit 103 receives the transmission timing of the data request from the signal transmission unit 104. The position information acquisition unit 103 acquires the position coordinates of the wireless terminal 10 at a timing prior to the transmission timing of the received data request, and outputs the acquired position coordinates of the wireless terminal 10 to the signal transmission unit 104.

  The position information acquisition unit 103 also acquires the position coordinates of the wireless terminal 10 even when an instruction to transmit the position coordinates received from the base station 20 is received from the wireless control unit 101. In this case, the position information acquisition unit 103 outputs the acquired position coordinates of the wireless terminal 10 to the wireless control unit 101 together with identification information that uniquely identifies the wireless terminal 10 (hereinafter referred to as “terminal ID: Identifier”). To do.

  The position information acquisition unit 103 also acquires the position coordinates of the wireless terminal 10 when receiving an instruction to transmit the position coordinates received from the base station 20 from the external I / F control unit 102. In this case, the position information acquisition unit 103 outputs the acquired position coordinates of the wireless terminal 10 to the I / F control unit 102 together with the terminal ID.

  The signal transmission unit 104 generates various signals used for communication between the wireless terminal 10 and the network 30. For example, the signal transmission unit 104 generates a connection request for requesting a connection to the network 30 or a data request for requesting the base station 20 to transmit data after the connection to the network 30 is established.

  In addition, the signal transmission unit 104 receives an input of the position coordinates of the wireless terminal 10 from the position information acquisition unit 103 at the timing of transmission of the connection request. The signal transmission unit 104 adds the received position coordinates of the wireless terminal 10 to the generated connection request. The signal transmission unit 104 further adds the terminal ID of the wireless terminal 10 to the generated connection request. Then, the signal transmission unit 104 periodically outputs a connection request to which the position coordinates of the wireless terminal 10 and the terminal ID are added to the wireless control unit 101. The signal transmission unit 104 is an example of a transmission unit.

  In addition, the signal transmission unit 104 receives an input of the position coordinates of the wireless terminal 10 from the position information acquisition unit 103 at the timing of transmitting the data request. The signal transmission unit 104 adds the received position coordinates of the wireless terminal 10 to the generated data request. The signal transmission unit 104 further adds a terminal ID to the generated data request. Then, the signal transmission unit 104 periodically outputs a data request to which the position coordinates of the wireless terminal 10 and the terminal ID are added to the wireless control unit 101.

  FIG. 3 is a diagram illustrating an example of the format of a connection request frame and a data request frame. The same format is used for the connection request and data request frames. As illustrated in FIG. 3, the signal transmission unit 104 adds X-Point, Y-Point, and Z-Point as the position coordinates of the wireless terminal 10 to the Data field of the connection request or the data request. X-Point indicates the X coordinate of the wireless terminal 10, Y-Point indicates the Y coordinate of the wireless terminal 10, and Z-Point indicates the Z coordinate of the wireless terminal 10. Furthermore, the signal transmission unit 104 adds a terminal ID to the Data field of the connection request or data request. The format shown in FIG. 3 has fields of FrameControl, Duration / ID, Address1, Address2, Address3, SequenceControl, Address4, and FSC in addition to the Data field. The FrameControl field indicates the type of frame. When the value set in the FrameControl field is “0x0400”, it indicates that the frame is a connection request (Probe Request). When the value set in the FrameControl field is “0x1600”, this indicates that the frame is a data request (PS-Poll).

  Next, the configuration of the base station 20 shown in FIG. 1 will be described with reference to FIG. FIG. 4 is a diagram illustrating a configuration example of the base station in the present embodiment. As shown in FIG. 4, the base station 20 includes a radio control unit 201, an external I / F control unit 202, a storage unit 203, a connection control unit 204, a communication allowable range acquisition unit 205, and a communication allowable range registration. Part 206. In addition, the base station 20 has an antenna connected to the radio control unit 201.

  The radio control unit 201 controls radio communication between the radio terminal 10 and the base station 20. The wireless control unit 201 receives an instruction to transmit the position coordinates of the wireless terminal 10 from the communication allowable range acquisition unit 205. The wireless control unit 201 transmits an instruction to transmit the received position coordinates of the wireless terminal 10 to the wireless terminal 10 via the antenna.

  Further, the wireless control unit 201 receives the position coordinates and the terminal ID of the wireless terminal 10 from the wireless terminal 10 via the antenna. The wireless control unit 201 outputs the received position coordinates and terminal ID of the wireless terminal 10 to the communication allowable range acquisition unit 205.

  In addition, the wireless control unit 201 receives a connection request to which the position coordinates of the wireless terminal 10 and the terminal ID are added from the wireless terminal 10 via the antenna. The wireless control unit 201 outputs the received connection request to the connection control unit 204. The wireless control unit 201 is an example of a receiving unit.

  In addition, the wireless control unit 201 receives an input of a connection permission response from the connection control unit 204. The wireless control unit 201 transmits the accepted connection permission response to the wireless terminal 10 via the antenna.

  In addition, the wireless control unit 201 receives a data request to which the position coordinates and the terminal ID of the wireless terminal 10 are added from the wireless terminal 10 via the antenna. The wireless control unit 201 outputs the received connection request to the connection control unit 204.

  The external I / F control unit 202 controls wired communication between the base station 20 and the external device. The external I / F control unit 202 receives an instruction to transmit the position coordinates of the wireless terminal 10 from the communication allowable range acquisition unit 205. The external I / F control unit 202 transmits the received instruction to transmit the position coordinates of the wireless terminal 10 to the wireless terminal 10 via a cable (not shown) such as a LAN cable.

  Further, the external I / F control unit 202 receives the position coordinates of the wireless terminal 10 and the terminal ID from the wireless terminal 10 via a cable. The external I / F control unit 202 outputs the received position coordinates and terminal ID of the wireless terminal 10 to the communication allowable range acquisition unit 205.

  The storage unit 203 is a storage device such as a memory or a hard disk. The storage unit 203 stores information on a communication allowable range that is a range of position coordinates in which communication between the network 30 and the wireless terminal 10 is allowed. FIG. 5 is a diagram illustrating an example of information on the allowable communication range stored in the storage unit. As illustrated in FIG. 5, the storage unit 203 stores information on a communication allowable range in association with a terminal ID that is identification information of the wireless terminal 10. In other words, the storage unit 203 stores information on a communication allowable range that is different or the same for each wireless terminal 10. In the example illustrated in FIG. 5, the storage unit 203 stores information on the allowable communication range for each wireless terminal 10. For example, in the first row of the storage unit 203, the communication allowable range corresponding to the wireless terminal 10 whose terminal ID is “ID1” is (X, Y, Z) = (x11, y11, z11), (x12, y12, z12). ), (Z11, z12, z13),... Further, for example, the second line of the storage unit 203 indicates that the communication allowable range corresponding to the wireless terminal 10 whose terminal ID is “ID2” is (X, Y, Z) = (x21, y21, z21), (x22, y22, z22), (z21, z22, z23),... The information on the allowable communication range stored in the storage unit 203 is registered by the allowable communication range registration unit 206 described later.

  The connection control unit 204 receives the connection request received from the wireless terminal 10 from the wireless control unit 201. The connection control unit 204 determines whether or not the position coordinates of the wireless terminal 10 added to the connection request belong to the communication allowable range stored in the storage unit 203. Specifically, the connection control unit 204 first extracts the position coordinates and the terminal ID of the wireless terminal 10 added to the connection request. Subsequently, the connection control unit 204 searches the storage unit 203 using the extracted terminal ID, that is, the terminal ID of the wireless terminal 10 that is the transmission source of the connection request, as a key, and sets the communication allowable range corresponding to the terminal ID. Then, it is determined whether or not the extracted position coordinates of the wireless terminal 10 belong.

  Then, when the position coordinates of the wireless terminal 10 added to the connection request belong to the communication allowable range stored in the storage unit 203, the connection control unit 204 wirelessly transmits a connection permission response that permits connection to the network 30. Output to the control unit 201. As a result, authentication processing and network connection processing are performed between the wireless terminal 10 that has received the connection permission response and the base station 20, and a connection from the wireless terminal 10 to the network 30 is established. Since the authentication process and the network connection process are the same as those conventionally performed, the description thereof is omitted. On the other hand, if the position coordinate of the wireless terminal 10 added to the connection request does not belong to the communication allowable range stored in the storage unit 203, the connection control unit 204 stops returning a connection permission response to the wireless terminal 10. To do. Thereby, the connection from the wireless terminal 10 to the network 30 is rejected.

  In the example of FIG. 1, since the position coordinate of the wireless terminal 10a added to the connection request belongs to the communication allowable range stored in the storage unit 203, the connection control unit 204 sends a connection permission response to the wireless terminal 10a to the wireless control unit. To 201. On the other hand, in the example of FIG. 1, since the position coordinate of the wireless terminal 10b added to the connection request does not belong to the communication allowable range stored in the storage unit 203, the connection control unit 204 returns a connection permission response to the wireless terminal 10b. Cancel reply.

  In addition, the connection control unit 204 receives a data request received from the wireless terminal 10 from the wireless control unit 201. The connection control unit 204 determines whether the coordinate position of the wireless terminal 10 added to the data request belongs to the communication allowable range stored in the storage unit 203. Specifically, the connection control unit 204 first extracts the position coordinates and terminal ID of the wireless terminal 10 added to the data request. Subsequently, the connection control unit 204 searches the storage unit 203 using the extracted terminal ID, that is, the terminal ID of the wireless terminal 10 that is the transmission source of the data request as a key, and sets the communication allowable range corresponding to the terminal ID. Then, it is determined whether or not the extracted position coordinates of the wireless terminal 10 belong.

  Then, when the position coordinates of the wireless terminal 10 added to the data request belong to the allowable communication range stored in the storage unit 203, the connection control unit 204 continues the connection from the wireless terminal 10 to the network 30. On the other hand, the connection control unit 204 disconnects the connection from the wireless terminal 10 to the network 30 when the position coordinate of the wireless terminal 10 added to the data request does not belong to the communication allowable range stored in the storage unit 203. To do.

  In the example of FIG. 1, the connection control unit 204 continues the connection from the wireless terminal 10a to the network 30 because the position coordinate of the wireless terminal 10a added to the data request belongs to the communication allowable range stored in the storage unit 203. To do. On the other hand, in the example of FIG. 1, it is assumed that the wireless terminal 10 a has moved outside the communication allowable range 22. In this case, the connection control unit 204 disconnects the connection from the wireless terminal 10a to the network 30 because the position coordinate of the wireless terminal 10a added to the data request does not belong to the communication allowable range stored in the storage unit 203. To do.

  The communication allowable range acquisition unit 205 acquires a communication allowable range. Specifically, the communication allowable range acquisition unit 205 outputs an instruction to transmit the position coordinates of the wireless terminal 10 to the wireless control unit 201. For example, the communication allowable range acquisition unit 205 outputs an instruction to transmit the position coordinates of the wireless terminal 10 to a plurality of coordinate points (for example, 8 points forming a vertex of a cube) to the wireless control unit 201. The communication allowable range acquisition unit 205 acquires the communication allowable range by sequentially receiving, from the wireless control unit 201, the position coordinates of the wireless terminal 10 transmitted from the wireless terminal 10 for a plurality of coordinate points. Further, the communication allowable range acquisition unit 205 receives a terminal ID associated with the position coordinates of the wireless terminal 10 from the wireless control unit 201. Then, the allowable communication range acquisition unit 205 outputs the acquired combination of allowable communication range and terminal ID to the allowable communication range registration unit 206.

  The allowable communication range registration unit 206 registers the allowable communication range acquired by the allowable communication range acquisition unit 205 in the storage unit 203. Specifically, the allowable communication range registration unit 206 receives a combination of the allowable communication range and the terminal ID from the allowable communication range registration unit 206. Then, the allowable communication range registration unit 206 registers the combination of the allowable communication range and the terminal ID in the storage unit 203. Accordingly, the communication allowable range registration unit 206 can register information on the communication allowable range that differs for each wireless terminal 10 in the storage unit 203. For this reason, it becomes possible to set a different communication allowable range for each owner of the wireless terminal 10, and the degree of freedom in setting the communication allowable range can be improved.

  Next, with reference to FIGS. 6-8, the flow of a process of the radio | wireless communications system which concerns on a present Example is demonstrated. FIG. 6 is a sequence diagram illustrating a processing procedure of a communication allowable range registration process performed by the wireless communication system according to the present embodiment. In FIG. 6, a processing procedure from when the base station 20 instructs the wireless terminal 10 to transmit position coordinates until the base station 20 registers the communication allowable range will be described.

  As illustrated in FIG. 6, the base station 20 transmits an instruction to transmit position coordinates to the wireless terminal 10 (step S101). For example, the base station 20 transmits to the wireless terminal 10 an instruction to transmit the position coordinates of the wireless terminal 10 by a plurality of coordinate points (for example, 8 points forming a vertex of a cube).

  The wireless terminal 10 receives an instruction to transmit position coordinates from the base station 20 (step S102). The wireless terminal 10 acquires the position coordinates of the wireless terminal 10 (step S103). For example, the wireless terminal 10 acquires the position coordinates of the wireless terminal 10 using the GPS function. The wireless terminal 10 transmits the acquired position coordinates of the wireless terminal 10 to the base station 20 (step S104).

  The base station 20 receives the position coordinates of the wireless terminal 10 from the wireless terminal 10 (step S105). For example, the processes of steps S103 to S105 are repeatedly executed until the base station 20 receives the position coordinates of the wireless terminal 10 corresponding to a plurality of coordinate points (for example, eight points forming a vertex of a cube). The base station 20 acquires the communication allowable range by sequentially receiving the position coordinates of the wireless terminal 10 transmitted from the wireless terminal 10 for a plurality of coordinate points (step S106). At this time, the base station 20 receives a terminal ID associated with the position coordinates of the wireless terminal 10 from the wireless terminal 10. The base station 20 registers the acquired communication allowable range and terminal ID combination in the storage unit 203 (step S107).

  FIG. 7 is a sequence diagram illustrating a processing procedure of communication processing before connection by the wireless communication system according to the present embodiment. In FIG. 7, a processing procedure until the wireless terminal 10 tries to connect to the network 30 after the processing illustrated in FIG. 6 will be described. In the following description, it is assumed that the connection request transmission timing comes periodically.

  As illustrated in FIG. 7, the wireless terminal 10 acquires the position coordinates of the wireless terminal 10 at a timing prior to the connection request transmission timing (step S <b> 201). When the connection request transmission timing arrives, the wireless terminal 10 generates a connection request, and adds the position coordinates of the wireless terminal 10 acquired in step S201 to the generated connection request (step S202). At this time, the wireless terminal 10 further adds a terminal ID to the generated connection request. The wireless terminal 10 transmits a connection request to which the position coordinates of the wireless terminal 10 and the terminal ID are added to the base station 20 (step S203).

  The base station 20 receives the connection request to which the position coordinates and the terminal ID of the wireless terminal 10 are added from the wireless terminal 10 (Step S204). The base station 20 extracts the position coordinates of the wireless terminal 10 added to the connection request (step S205). At this time, the base station 20 extracts the terminal ID added to the connection request. The base station 20 determines whether or not the extracted position coordinates of the wireless terminal 10 belong to the communication allowable range stored in the storage unit 203 (step S206). Specifically, the base station 20 searches the storage unit 203 using the extracted terminal ID, that is, the terminal ID of the wireless terminal 10 that is the transmission source of the connection request, as a key, and the communication allowable range corresponding to the terminal ID. Whether the extracted position coordinates of the wireless terminal 10 belong or not is determined.

  When the position coordinates of the wireless terminal 10 belong to the communication allowable range stored in the storage unit 203 (step S206; Yes), the base station 20 sends a connection permission response permitting connection to the network 30 to the wireless terminal 10. A reply is made (step S207). As a result, authentication processing and network connection processing are performed between the wireless terminal 10 that has received the connection permission response and the base station 20, and connection from the wireless terminal 10 to the network 30 is established (step S208).

  On the other hand, when the position coordinates of the wireless terminal 10 do not belong to the communication allowable range stored in the storage unit 203 (step S206; No), the base station 20 stops returning the connection permission response to the wireless terminal 10. (Step S209), the process ends. Thereby, the connection from the wireless terminal 10 to the network 30 is rejected.

  FIG. 8 is a sequence diagram illustrating a processing procedure of post-connection communication processing by the wireless communication system according to the present embodiment. In FIG. 8, after the connection from the wireless terminal 10 to the network 30 is established in the process of FIG. 7 (steps S206 in FIG. 7; Yes, S207, S208), the wireless terminal 10 requests the base station 20 to transmit data. The processing procedure up to will be described. In the following description, it is assumed that the transmission timing of the data request comes periodically.

  As illustrated in FIG. 8, the wireless terminal 10 acquires the position coordinates of the wireless terminal 10 at a timing before the transmission timing of the data request (Step S301). When the transmission timing of the data request arrives, the wireless terminal 10 generates a data request, and adds the position coordinates of the wireless terminal 10 acquired in step S301 to the generated data request (step S302). At this time, the wireless terminal 10 further adds a terminal ID to the generated data request. The wireless terminal 10 transmits a data request to which the position coordinates of the wireless terminal 10 and the terminal ID are added to the base station 20 (step S303).

  The base station 20 receives the data request to which the position coordinates and the terminal ID of the wireless terminal 10 are added from the wireless terminal 10 (step S304). The base station 20 extracts the position coordinates of the wireless terminal 10 added to the data request (step S305). At this time, the base station 20 extracts the terminal ID added to the data request. The base station 20 determines whether or not the extracted position coordinates of the wireless terminal 10 belong to the communication allowable range stored in the storage unit 203 (step S306). Specifically, the base station 20 searches the storage unit 203 using the extracted terminal ID, that is, the terminal ID of the wireless terminal 10 that is the transmission source of the data request as a key, and the communication allowable range corresponding to the terminal ID. Whether the extracted position coordinates of the wireless terminal 10 belong or not is determined.

  When the position coordinates of the wireless terminal 10 belong to the communication allowable range stored in the storage unit 203 (step S306; Yes), the base station 20 continues the connection from the wireless terminal 10 to the network 30 (step S307). .

  On the other hand, when the position coordinates of the wireless terminal 10 do not belong to the communication allowable range stored in the storage unit 203 (step S306; No), the base station 20 disconnects the connection from the wireless terminal 10 to the network 30. (Step S308), the process ends.

  As described above, in the wireless communication system according to the present embodiment, the wireless terminal 10 acquires the position coordinates of the wireless terminal 10. The wireless terminal 10 adds the acquired position coordinates of the wireless terminal 10 to the connection request for requesting connection to the network 30 and transmits a connection request to which the position coordinates of the wireless terminal 10 are added to the base station 20. The base station 20 receives the connection request transmitted from the wireless terminal 10, and determines whether or not the position coordinates of the wireless terminal 10 added to the connection request belong to the communication allowable range stored in the storage unit 203. When the position coordinates of the wireless terminal 10 belong to the communication allowable range, the base station 20 returns a connection permission response permitting connection to the network 30 to the wireless terminal 10, and the position coordinates of the wireless terminal 10 are within the communication allowable range. If not, the connection permission response is not returned. For this reason, even when the radio terminal 10 enters the radio wave reachable range from the base station 20, the base station 20 transmits the network 30 to the network 30 if the position coordinates of the radio terminal 10 do not belong to the communication allowable range. Connection to can be refused. Thereby, it is possible to avoid an excessive increase in the number of wireless terminals that can be connected to the network 30. As a result, according to the wireless communication system of the present embodiment, the wireless terminals that can be connected to the network can be appropriately restricted, and the security of a network such as a wireless LAN can be improved.

  In the present embodiment, the wireless terminal 10 further adds the position coordinates of the wireless terminal 10 to the data request for requesting data from the base station 20 after the connection to the network 30 is established. A connection request to which is added is transmitted to the base station 20. The base station 20 receives the data request transmitted from the wireless terminal 10, and determines whether the position coordinates of the wireless terminal 10 added to the data request belong to the communication allowable range stored in the storage unit 203. The base station 20 continues to connect to the network 30 when the position coordinates of the wireless terminal 10 belong to the communication allowable range, and to the network 30 when the position coordinates of the wireless terminal 10 do not belong to the communication allowable range. Disconnect the connection. For this reason, even after the connection from the wireless terminal 10 to the network 30 is established, the base station 20 moves from the wireless terminal 10 to the network 30 when the position coordinates of the wireless terminal 10 do not belong to the communication allowable range. Can be disconnected. As a result, according to the wireless communication system of the present embodiment, wireless terminals once connected to the network can be appropriately restricted, and the security of a network such as a wireless LAN can be further improved.

  In this embodiment, the storage unit 203 in the base station 20 stores the communication allowable range in the storage unit 203 in association with the terminal ID of the wireless terminal 10. The base station 20 is a wireless terminal added to the received connection request or data request within the communication allowable range corresponding to the terminal ID that is the connection request transmission source or the data request transmission source stored in the storage unit 203. It is determined whether 10 pieces of position information belong. Thereby, the base station 20 can set different communication allowable ranges for each owner of the wireless terminal 10, and can determine whether the communication allowable range belongs for each owner of the wireless terminal 10. As a result, according to the wireless communication system of the present embodiment, the wireless terminals that can be connected to the network can be individually restricted for each owner of the wireless terminal. For example, the security of the network such as a wireless LAN is the owner of the wireless terminal. Each can be managed individually.

  Further, in this embodiment, the base station 20 acquires the communication allowable range from the wireless terminal 10 and registers the acquired communication allowable range in its own storage unit 203. For this reason, according to the radio | wireless communications system of a present Example, the freedom degree of the setting of a communication permissible range can be improved.

[Hardware configuration]
Next, with reference to FIG.9 and FIG.10, the hardware constitutions of the radio | wireless terminal and base station which concern on the said Example are demonstrated. FIG. 9 is a hardware configuration diagram of the wireless terminal. FIG. 10 is a hardware configuration diagram of the base station.

  As shown in FIG. 9, the wireless terminal according to the present embodiment includes a memory 501, a processor 502, an antenna 503, an RF (Radio Frequency) circuit 504, and an external I / F 505. The memory 501, the RF circuit 504, and the external I / F 505 are each connected to the processor 502. The antenna 503 is connected to the RF circuit 504.

  The memory 501 is a storage device. The memory 501 stores various programs that realize processing by the wireless control unit 101, the external I / F control unit 102, the position information acquisition unit 103, the signal transmission unit 104, and the like illustrated in FIG.

  The RF circuit 504 communicates with the base station 20 via the antenna 503. For example, the function of the wireless control unit 101 illustrated in FIG. 2 is realized by the RF circuit 504, the processor 502, and the memory 501.

  The external I / F 505 communicates with the base station 20 via a cable (not shown) such as a LAN cable. For example, the function of the external I / F control unit 102 illustrated in FIG. 2 is realized by the external I / F 505, the processor 502, and the memory 501.

  In addition, the processor 502 and the memory 501 realize functions such as the position information acquisition unit 103 and the signal transmission unit 104 illustrated in FIG. 2, for example.

  For example, the processor 502 reads out various programs stored in the memory 501 and generates processes for realizing various functions on the memory 501. The processor 502 performs various processes by executing processes generated on the memory 501 together with the respective units.

  Further, the base station according to the present embodiment includes a memory 601, a processor 602, an antenna 603, an RF circuit 604, and an external I / F 605, as shown in FIG. The memory 601, the RF circuit 604, and the external I / F 605 are each connected to the processor 602. The antenna 603 is connected to the RF circuit 604.

  The memory 601 is a storage device and realizes the function of the storage unit 203 illustrated in FIG. 4, for example. In addition, the memory 601 stores various programs that realize processing by the wireless control unit 201, the external I / F control unit 202, the connection control unit 204, the communication allowable range acquisition unit 205, the communication allowable range registration unit 206, and the like illustrated in FIG. Is remembered.

  The RF circuit 604 communicates with the wireless terminal 10 via the antenna 603. For example, the functions of the wireless control unit 201 illustrated in FIG. 4 are realized by the RF circuit 604, the processor 602, and the memory 601.

  The external I / F 605 communicates with the base station 20 via a cable (not shown) such as a LAN cable. For example, the function of the external I / F control unit 202 illustrated in FIG. 4 is realized by the external I / F 605, the processor 602, and the memory 601.

  In addition, the processor 602 and the memory 601 realize functions such as the connection control unit 204, the communication allowable range acquisition unit 205, and the communication allowable range registration unit 206 illustrated in FIG.

  For example, the processor 602 reads various programs stored in the memory 601 and generates processes for realizing various functions on the memory 601. The processor 602 performs various processes by executing processes generated on the memory 601 together with the respective units.

10, 10a, 10b Wireless terminal 20 Base station 30 Network 101 Wireless control unit 102 External I / F control unit 103 Position information acquisition unit 104 Signal transmission unit 201 Wireless control unit 202 External I / F control unit 203 Storage unit 204 Connection control unit 205 communication allowable range acquisition unit 206 communication allowable range registration unit

Claims (7)

A wireless communication system having a base station device that provides a connection to a network and a wireless terminal device that connects to the network via the base station device,
The wireless terminal device
A position information acquisition unit that acquires position information indicating the position of the wireless terminal device;
A transmission unit that adds the location information to a connection request for requesting connection to the network and transmits the request to the base station device, and
The base station device
A storage unit that stores a communication allowable range that is a range of the position information in which communication between the network and the wireless terminal device is allowed;
A receiving unit for receiving the connection request transmitted from the wireless terminal device;
It is determined whether or not the position information added to the received connection request belongs to the communication allowable range, and when the position of the wireless terminal device based on the position information belongs to the communication allowable range, A connection permission response permitting connection to the network is returned to the wireless terminal device, and when the position of the wireless terminal device based on the position information does not belong to the communication allowable range, a response of the connection permission response is returned. A wireless communication system comprising: a connection control unit for canceling. The transmission unit further adds the position information to a data request for requesting the base station apparatus to transmit data after connection to the network is established, and adds the data request to which the position information is added to the base station. Regularly send to the device,
The receiving unit receives the data request transmitted from the wireless terminal device;
The connection control unit determines whether or not the position information added to the received data request belongs to the communication allowable range stored in the storage unit, and the wireless terminal device based on the position information When the position belongs to the communication allowable range, the connection to the network is continued. When the position of the wireless terminal device based on the position information does not belong to the communication allowable range, the connection to the network is established. The wireless communication system according to claim 1, wherein the wireless communication system is disconnected. The storage unit stores the communication allowable range in association with identification information of the wireless terminal device,
The connection control unit receives the connection received in the communication allowable range corresponding to the identification information of the wireless terminal device that is the transmission source of the connection request or the transmission source of the data request stored in the storage unit The wireless communication system according to claim 1 or 2, wherein it is determined whether or not the position of the wireless terminal device belongs based on the request or the position information added to the data request. The base station device
A communication allowable range acquisition unit for acquiring the communication allowable range;
The wireless communication system according to claim 1, further comprising: a communication allowable range registration unit that registers the acquired communication allowable range in the storage unit. A wireless terminal device in a wireless communication system, comprising: a base station device that provides connection to a network; and a wireless terminal device that connects to the network via the base station device,
A position information acquisition unit that acquires position information indicating the position of the wireless terminal device;
A wireless terminal device comprising: a transmission unit that adds the location information to a connection request for requesting connection to the network and transmits the request to the base station device. The base station apparatus in a wireless communication system including a base station apparatus that provides connection to a network and a wireless terminal apparatus that connects to the network via the base station apparatus,
A storage unit that stores a communication allowable range that is a range of the position information in which communication between the network and the wireless terminal device is allowed;
A receiving unit that receives a connection request transmitted from the wireless terminal device and requests connection to the network;
It is determined whether the position information added to the received connection request belongs to the communication allowable range stored in the storage unit, and the position of the wireless terminal device based on the position information is the communication allowable range If the position of the wireless terminal device based on the position information does not belong to the communication allowable range, the connection permission response for permitting connection to the network is returned to the wireless terminal device. A base station apparatus comprising: a connection control unit that cancels a connection permission response. A communication control method executed by a wireless communication system including a base station device that provides a connection to a network and a wireless terminal device that connects to the network via the base station device,
The wireless terminal device is
Obtaining location information indicating the location of the wireless terminal device;
Adding the location information to a connection request for requesting connection to the network, and transmitting to the base station device,
The base station apparatus including a storage unit that stores a communication allowable range that is a range of the position information in which communication between the network and the wireless terminal device is allowed,
Receiving the connection request transmitted from the wireless terminal device;
Determining whether the location information included in the received connection request belongs to the communication allowable range stored in the storage unit;
When the position of the wireless terminal device based on the position information belongs to the communication allowable range, a connection permission response permitting connection to the network is returned to the wireless terminal device, and the wireless terminal based on the position information A communication control method comprising: canceling a reply of the connection permission response when the position of the device does not belong to the communication allowable range.

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