JP6343490B2 - Wireless communication system, wireless access point, portable terminal, and position information acquisition method - Google Patents

Description

  The present invention relates to a wireless communication system, a wireless access point, a portable terminal, and a position information acquisition method.

  2. Description of the Related Art Conventionally, a method of using radio waves received from GPS satellites is known as a method for a mobile terminal to recognize the current position. However, the accuracy of the position that can be recognized using GPS is about 10 to 100 m, and there is a problem that the position cannot be recognized indoors where radio waves from the satellite do not reach.

  Therefore, a method for recognizing the position of a mobile terminal that can communicate with the access point based on the strength of the radio wave received from the access point for Wi-Fi wireless communication has been proposed. For example, in the system described in Patent Document 1, a position estimation table that associates the position of a mobile terminal with the radio wave intensity of each access point received at the position is stored in the server. The portable terminal can acquire information indicating the estimated position based on the information in the position estimation table by transmitting the identification information and the radio wave intensity of the access point that transmitted the received radio wave to the server.

  Patent Document 2 discloses an access point for reporting an SSID including position information. The access point dynamically changes the SSID according to the priority order to which the mobile terminal should be connected.

JP 2012-7971 A JP2012-191615A

  By the way, in recent years, the number of movable access points is increasing. Examples of the movable access point include an access point that can be wirelessly connected to a base station of a mobile phone network and can be carried by an individual, or an access point mounted on a movable vehicle such as a train or bus. .

  In the method described in Patent Document 1, it is not assumed that the access point moves. Therefore, if the access point moves to a position different from the position of the access point indicated by the position estimation table, the mobile terminal misplaces the position. There was a case to recognize. For example, when a user who owns an access point whose position is assumed to be Osaka in the position estimation table moves to Tokyo with the access point, the mobile terminal that received the radio wave from the access point in Tokyo Had the problem of misrecognizing the current location as Osaka.

  In addition, since the access point described in Patent Document 2 reports the SSID including the position information, when such an access point exists nearby, the mobile terminal determines the position based on the position information included in the SSID. Can be estimated. However, since the name of the access point to be connected to the terminal is constantly changed, there is a possibility that the terminal may lose sight of the name of the access point as the connection target, and there is an access point near the mobile terminal that can report the SSID including the location information If not, there is a problem that the mobile terminal cannot estimate the position.

  Therefore, even when the access point moves, the present invention secures a stable connection between the terminal and the access point based on the radio wave received from the access point, and then positions the mobile terminal with high accuracy. The purpose is to be able to estimate.

  A wireless communication system according to a first aspect of the present invention is a wireless communication system comprising a mobile terminal and a movable mobile access point capable of wireless communication with the mobile terminal, wherein the mobile access point is A position information acquisition unit that acquires movement position information indicating a current position, and a transmission unit that transmits movement notification information including movable information indicating that movement is possible. A receiving unit that receives the mobile broadcast information from an access point and receives fixed broadcast information that does not include the movable information from a fixed access point other than the mobile access point; and the receiving unit receives the mobile broadcast information When the moving position information of the moving access point is acquired by the first method, and the receiving unit receives the fixed notification information Comprises an acquisition unit which acquires a fixed position information indicating a position of the fixed access point in the second method, the.

  The acquisition unit acquires, for example, the movement position information from the mobile access point when the reception unit receives the movement notification information, and the fixed unit when the reception unit receives the fixed notification information. The fixed position information is acquired from an external device storing the position information of the access point.

  In the mobile terminal, the position information selected based on the radio wave intensity of the movement notification information and the radio wave intensity of the fixed notification information among the plurality of movement position information and the fixed position information acquired by the acquisition unit. You may further provide the position estimation part which estimates a present position based on it.

  The transmission unit may transmit first movement notification information including the identification information of the mobile access point and the movable information and second movement notification information including the movement position information as the movement notification information. Good. The acquisition unit of the portable terminal may acquire the movement position information included in the second movement notification information when detecting the movable information included in the first movement notification information. Moreover, the said acquisition part may request | require the said movement position information from the said mobile access point, if the said movement alerting | reporting information is received.

  The portable terminal further includes a storage unit that stores the moving position information in association with the mobile access point, and stores the fixed position information in association with the fixed access point, and the acquisition unit When the movement position information is acquired, the movement position information stored in the storage unit in association with the movement access point may be updated.

  The wireless access point according to the second aspect of the present invention is a wireless access point capable of wireless communication with a mobile terminal, and indicates that the position information acquisition unit acquires position information indicating the current position and is movable. A transmission unit that transmits movement notification information including movable information to the portable terminal. The transmission unit may transmit first movement notification information including identification information of the wireless access point and the movable information, and second movement notification information including the position information as the movement notification information.

  The mobile terminal according to the third aspect of the present invention receives broadcast information including movable information indicating that it is movable from a movable mobile access point, and a fixed access point other than the mobile access point Receiving the fixed notification information not including the movable information from, and when the reception unit receives the movement notification information, to acquire the movement position information of the mobile access point in a first method, An acquisition unit that acquires fixed position information indicating a position of the fixed access point by a second method when the receiving unit receives the fixed notification information;

  The acquisition unit acquires the movement position information from the mobile access point when the reception unit receives the movement notification information, and the fixed access point when the reception unit receives the fixed notification information. The fixed position information may be acquired from an external device that stores the position information. In addition, the mobile terminal is selected from the plurality of the movement position information and the fixed position information acquired by the acquisition unit based on the radio wave intensity of the movement notification information and the radio wave intensity of the fixed notification information. May further include a position estimation unit that estimates the current position.

  In the position information acquisition method according to the fourth aspect of the present invention, a movable mobile access point capable of wireless communication with a mobile terminal is movable and a procedure for acquiring movement position information indicating a current position is movable. Transmitting the mobile broadcast information including the movable information indicating the mobile location information, and when the mobile terminal receives the mobile broadcast information, the mobile location information of the mobile access point is obtained by the first method. When a fixed notification information not including the movable information is received from a fixed access point other than the mobile access point and a fixed position information indicating the position of the fixed access point is acquired by the second method Follow the steps.

  According to the present invention, even when the access point moves, the position of the mobile terminal can be estimated with high accuracy based on the radio wave received from the access point.

It is a figure which shows the structure of the radio | wireless communications system which concerns on 1st Embodiment. It is a figure which shows the structure of mobile AP and a portable terminal. It is a figure which shows an example of the positional information table which the memory | storage part has memorize | stored. It is a figure which shows the communication sequence in a radio | wireless communications system. It is a figure which shows the communication sequence which concerns on 2nd Embodiment. It is a figure which shows the structure of the radio | wireless communications system which concerns on 3rd Embodiment. It is a figure which shows the structure of the radio | wireless communications system which concerns on 4th Embodiment.

<First Embodiment>
[Outline of Wireless Communication System S]
FIG. 1 is a diagram illustrating a configuration of a wireless communication system S according to the first embodiment. The wireless communication system S includes a mobile AP1 (mobile AP1-1, mobile AP1-2), a fixed AP2 (fixed AP2-1, fixed AP2-2), a mobile terminal 3, and a location information server 4. The mobile AP 1, the fixed AP 2, and the mobile terminal 3 can transmit and receive data to and from the location information server 4 via a network N such as a mobile phone communication line, a Wi-Fi wireless communication line, and the Internet.

  The mobile AP 1 is an access point for Wi-Fi wireless communication. The mobile AP 1 is an access point installed in a vehicle such as a movable train / bus, for example, and its position changes as the vehicle moves. When the mobile AP 1 is installed in a train, the mobile AP 1 can acquire position information from the train position management system and notify the mobile terminal 3 of the acquired position information. In this specification, the position information notified to the mobile terminal 3 by the mobile AP 1 is referred to as “movement position information”.

  The mobile AP 1 transmits broadcast information (for example, a beacon) including an SSID (Service Set Identifier) that is information for identifying the mobile AP 1 at a predetermined timing. The broadcast information includes movable information indicating that the mobile AP 1 is a movable access point. In the present specification, the notification information transmitted by the mobile AP 1 is referred to as “movement notification information”. Details of the movement notification information will be described later.

  The fixed AP 2 is an access point for Wi-Fi wireless communication. The fixed AP 2 is an access point installed at a predetermined location, and its position does not change. The fixed AP 2 transmits, at a predetermined timing, broadcast information that includes an SSID that is information for identifying the fixed AP 2 and does not include movable information. In the present specification, the broadcast information transmitted by the fixed AP 2 is referred to as “fixed broadcast information”.

  The mobile terminal 3 is, for example, a smartphone or a tablet. The mobile terminal 3 can communicate with the mobile AP 1 and the fixed AP 2 via the Wi-Fi wireless communication line, and can communicate with the location information server 4 via the mobile phone communication line, the mobile phone base station, and the network N. is there. The portable terminal 3 acquires the position information of the mobile AP 1 from the nearby mobile AP 1. In addition, the mobile terminal 3 acquires the location information of the nearby fixed AP 2 from the location information server 4. The mobile terminal 3 can estimate the current position of the mobile terminal 3 based on the acquired position information of the mobile AP 1 and the position information of the fixed AP 2.

  The location information server 4 is a server that manages location information of the fixed AP 2. The location information server 4 receives the SSID of the fixed AP 2 and the location information from the fixed AP 2 and stores the SSID of the fixed AP 2 and the location information in association with each other. The location information server 4 may receive the SSID and location information of the fixed AP 2 from the mobile terminal 3 that has received the notification information transmitted by the fixed AP 2, and store the received SSID and location information in association with each other. In this specification, the position information of the fixed AP 2 that the position information server 4 transmits to the mobile terminal 3 is referred to as “fixed position information”.

[Configuration of Mobile AP 1 and Portable Terminal 3]
FIG. 2 is a diagram illustrating the configuration of the mobile AP 1 and the mobile terminal 3.
The mobile AP 1 includes a storage unit 11, a position information acquisition unit 12, a mobile radio unit 13, a Wi-Fi radio unit 14, and a control unit 15. The storage unit 11 includes a ROM and a RAM. The storage unit 11 stores a program executed by the control unit 15. The storage unit 11 temporarily stores the position information acquired by the position information acquisition unit 12.

  The position information acquisition unit 12 acquires position information transmitted from the vehicle position management system mounted on the vehicle where the mobile AP 1 is installed. The vehicle position management system can transmit position information indicating the position specified based on the travel distance after leaving the station to the mobile AP 1. When the position information acquisition unit 12 can acquire position information from the vehicle position management system, the position information can be acquired even in an area where a radio wave from a GPS satellite does not reach, such as in a tunnel.

  The mobile wireless unit 13 is a wireless module that transmits and receives radio waves for communicating with a base station of a mobile phone network. The mobile AP 1 transmits and receives data to and from the base station via the mobile radio unit 13 when accessing the Internet.

  The Wi-Fi wireless unit 14 is a wireless module that transmits and receives radio waves for communicating with the mobile terminal 3 via a Wi-Fi wireless communication line. The Wi-Fi wireless unit 14 transmits a radio wave carrying data transmitted by the transmission unit 152. In addition, the Wi-Fi wireless unit 14 receives radio waves transmitted from the mobile terminal 3.

  The control unit 15 is a CPU, for example. The control unit 15 performs overall control of the function of the mobile AP 1 by executing the program stored in the storage unit 11. The control unit 15 functions as a notification information generation unit 151, a transmission unit 152, and a reception unit 153.

  The notification information generation unit 151 generates notification information to be transmitted to the mobile terminal 3. The notification information generation unit 151 generates movement notification information including the SSID of the mobile AP 1 and the movable information indicating that the mobile AP 1 is movable.

  The movement notification information is composed of, for example, two types of movement notification information. The first movement notification information includes a predetermined character string “mob *” as the movable information indicating that the mobile AP 1 is movable, such as “mob * 123456”. Further, the first movement notification information includes “123456” that is identification information unique to the movement AP1 following the character string. “Mob *” indicates that the second movement notification information starting with “mob” includes movement position information. The second movement notification information includes a predetermined character string “mob” indicating movement position information indicating latitude and longitude, and movement position information, such as “mob_N35.3929_E139.4428”. It consists of

  The transmission unit 152 transmits the movement notification information including the movable information generated by the notification information generation unit 151. For example, the transmission unit 152 transmits the movement notification information at a timing when the position of the mobile AP 1 has changed more than a predetermined distance after transmitting the previous movement notification information. The transmission unit 152 may transmit the first movement notification information at a predetermined time interval and may transmit the second movement notification information at a time interval larger than the time interval. The transmission unit 152 may transmit the movement notification information at a time interval determined based on the movement speed.

  The receiving unit 153 receives data from the mobile terminal 3 via the Wi-Fi wireless unit 14. When the reception unit 153 receives data from the mobile terminal 3, the mobile AP 1 transmits to the base station via the mobile radio unit 13 or via the Wi-Fi radio unit 14 according to the content of the received data. A response message is transmitted to the mobile terminal 3.

Next, the configuration of the mobile terminal 3 will be described.
The portable terminal 3 includes a display unit 31, a storage unit 32, a mobile wireless unit 33, a Wi-Fi wireless unit 34, and a control unit 35. The display unit 31 is a display. When the mobile terminal 3 receives the notification information from the mobile AP 1 or the fixed AP 2, the mobile terminal 3 can display the SSID included in the notification information on the display unit 31.

  The storage unit 32 includes a ROM and a RAM. The storage unit 32 stores a program executed by the control unit 35. Further, the storage unit 32 stores movement position information that is position information of the mobile AP1 in association with the movement AP1, and stores fixed position information that is position information of the fixed AP2 in association with the fixed AP2. Specifically, the storage unit 32 stores a position information table in which the SSIDs of the mobile AP 1 and the fixed AP 2 and the latitude / longitude information of the mobile AP 1 and the fixed AP 2 are associated with each other.

  FIG. 3 is a diagram illustrating an example of the position information table stored in the storage unit 32. In the position information table, “position information ID” indicating an information number in the position information table, “SSID” of the mobile AP1 and fixed AP2, and whether the AP corresponding to the position information ID is the mobile AP1 or the fixed AP2 “Movement / fixed” information, “RSSI (Received Signal Strength Indicator)” indicating the strength of radio waves received from the mobile AP1 and the fixed AP2, and “position information” indicating the positions of the mobile AP1 and the fixed AP2 are associated with each other.

  Returning to FIG. 2, the mobile wireless unit 33 is a wireless module that transmits and receives radio waves for communication with a base station of a mobile phone network. The Wi-Fi wireless unit 34 is a wireless module that transmits and receives radio waves for communicating with the mobile AP 1 and the fixed AP 2 via the Wi-Fi wireless communication line.

  The control unit 35 is a CPU, for example. The control unit 35 comprehensively controls the functions of the mobile terminal 3 by executing the program stored in the storage unit 32. The control unit 35 functions as a transmission unit 351, a reception unit 352, an acquisition unit 353, and a position estimation unit 354.

  The transmission unit 351 transmits a message to the location information server 4 via the mobile wireless unit 33. For example, the transmission unit 351 transmits a message requesting the location information of the fixed AP 2 that has received the notification information to the location information server 4. Further, the transmission unit 351 transmits a message to the mobile AP 1 and the fixed AP 2 via the Wi-Fi wireless unit 34. For example, the transmission unit 351 transmits an HTTP (Hyper Text Transfer Protocol) message necessary for accessing the Internet to the mobile AP1 and the fixed AP2, or transmits a message requesting location information to the mobile AP1. To do.

  The receiving unit 352 receives location information from the location information server 4 via the mobile radio unit 33. Further, the receiving unit 352 receives the movement notification information from the mobile AP 1 and receives the fixed notification information from the fixed AP 2 via the Wi-Fi wireless unit 34. Further, the receiving unit 352 receives position information from the mobile AP 1.

  The acquisition unit 353 acquires the movement position information of the mobile AP 1 by the first method when the reception unit 352 receives the movement notification information. Specifically, when the acquisition unit 353 detects the movable information “mob *” included in the first movement notification information transmitted by the mobile AP 1, the movement position included in the second movement notification information. Get information. For example, when “mob * 123456” is received as the first movement notification information, the acquisition unit 353 starts with “mob” because the received notification information includes “mov *” that is movable information. 2nd movement alerting | reporting information "mob_N35.3929_E139.4428" is received.

  On the other hand, when the receiving unit 352 receives the fixed notification information, the acquiring unit 353 acquires the fixed position information indicating the position of the fixed AP 2 by the second method. Specifically, the acquisition unit 353 acquires the fixed position information of the fixed AP 2 from the position information server 4 when the reception unit 352 receives the fixed notification information.

  The acquisition unit 353 acquires the movement position information included in the movement notification information when the reception unit 352 receives movement notification information from the mobile AP 1 with a radio field strength stronger than a predetermined threshold, and the acquired movement position information Then, the data is stored in the storage unit 32 in association with the SSID of the mobile AP 1. Further, when the receiving unit 352 receives the fixed notification information from the fixed AP 2 with a radio field strength stronger than a predetermined threshold, the acquiring unit 353 sends a position information request including the SSID of the fixed AP 2 to the position information server 4. Send. When the receiving unit 352 receives the fixed position information corresponding to the transmitted SSID from the position information server 4, the acquiring unit 353 stores the received fixed position information in the storage unit 32 in association with the SSID of the fixed AP 2.

  Based on the position information selected based on the radio wave intensity of the movement notification information and the radio wave intensity of the fixed notification information among the plurality of movement position information and fixed position information acquired by the acquisition unit 353, the position estimation unit 354 Estimate the position. Specifically, the position estimation unit 354 estimates the position indicated by the movement position information of the mobile AP 1 that transmitted the movement notification information as the current position when the RSSI when the movement notification information is received is larger than a predetermined threshold. . Similarly, the position estimation unit 354 estimates the position indicated by the fixed position information of the fixed AP 2 that transmitted the fixed notification information as the current position when the RSSI when the fixed notification information is received is larger than a predetermined threshold.

  For example, the position estimation unit 354 has a RSSI larger than −60 dBm when the RSSI when the mobile broadcast information and the fixed broadcast information are received is the state indicated by the position information table in FIG. 3 and the threshold is −60 dBm. It is estimated that the current position is north latitude 35.3929 degrees and east longitude 139.4428 indicated by the movement position information (N35.3929 E139.4428) corresponding to the position information ID02.

  When there are a plurality of moving position information and fixed position information corresponding to RSSI larger than a predetermined threshold, the position estimating unit 354 estimates the current position based on the plurality of moving position information and fixed position information. For example, when the threshold value in the position information table of FIG. 3 is −65 dBm, the position estimation unit 354 averages the moving position information and the fixed position information corresponding to the position information ID02, ID04, and ID06 whose RSSI is larger than −65 dBm. Is used to estimate the current position.

  The position estimation unit 354 may estimate the current position by calculating a weighted average value based on the RSSI size. That is, the position estimation unit 354 uses the weight of the movement position information corresponding to ID02 having the largest RSSI of −50 dBm, the fixed position information corresponding to ID04 having the RSSI of −60 dBm, and the movement position information corresponding to ID06. An average value is calculated by setting it larger than the weight. By doing in this way, the position estimation unit 354 can estimate the current position at a position close to the position of the mobile AP1 having a higher received radio wave intensity, and thus can improve the estimation accuracy of the current position.

  The position estimation unit 354 may preferentially use position information corresponding to an SSID with a small amount of RSSI variation within a predetermined period among a plurality of movement position information and fixed position information, and may estimate the current position. Good. For example, when the RSSI of the radio wave received from the fixed AP 2 corresponding to the fixed position information changes in a short time, it is considered that the mobile terminal 3 is moving. In such a case, when the RSSI fluctuation amount of the radio wave received from the mobile AP 1 corresponding to the specific movement position information is smaller than a predetermined value, the mobile terminal 3 moves in the vehicle in which the mobile AP 1 is installed. It is thought that there is. Therefore, the position estimation unit 354 can improve the estimation accuracy of the current position by estimating the current position based on the movement position information whose RSSI fluctuation amount is smaller than a predetermined value.

[Communication Sequence in Wireless Communication System S]
FIG. 4 is a diagram showing a communication sequence in the radio communication system S.
The mobile AP 1 broadcasts the mobile notification information at a predetermined timing. Specifically, the first movement notification information “mob * 123456” including the movable information and the second movement notification information “mob_N35.3929_E139.4428” including the movement position information are broadcast.

  Receiving the movement notification information “mob * 123456”, the portable terminal 3 stores the SSID “123456” included in the received movement notification information in the storage unit 32 (S1). Subsequently, the mobile terminal 3 receives the movement position information “mob_N35.3929_E139.4428” starting from the character string “mod” corresponding to the predetermined character string “mod *” included in the movement notification information.

  If the RSSI when the movement position information is received is larger than the predetermined threshold (S2), the portable terminal 3 stores the received movement position information “N35.3929 E139.4428” in the storage unit 32. When the movement position information corresponding to the movement AP1 is already stored in the storage unit 32, the portable terminal 3 updates the latest movement position information. If the RSSI when the mobile position information is received is equal to or less than a predetermined threshold, the mobile terminal 3 determines that the received mobile position information has low accuracy and does not store the mobile position information in the storage unit 32.

  In parallel with the operation in which the mobile AP 1 transmits the movement notification information, the fixed AP 2 broadcasts the fixed notification information at a predetermined timing. When the RSSI when the fixed location information is received is larger than a predetermined threshold (S4), the mobile terminal 3 extracts the SSID included in the received fixed notification information and sends a location information request including the extracted SSID to the location information. Send to server 4. The location information server 4 transmits the fixed location information stored in association with the SSID received from the mobile terminal 3 to the mobile terminal 3. The portable terminal 3 stores the received fixed position information in the storage unit 32 (S5). In S4, when the RSSI when the fixed position information is received is equal to or less than the predetermined threshold value, the mobile terminal 3 does not transmit a position information request and waits until another moving position information or fixed position information is received. .

  When the user activates the application using the position information, the mobile terminal 3 estimates the current position with reference to the movement position information and the fixed position information stored in the storage unit 32 (S6). For example, when the route search application is activated, the mobile terminal 3 searches the display unit 31 for an optimum route based on the estimated current position and the destination input by the user.

[Effect in the first embodiment]
As described above, in the wireless communication system S according to the first embodiment, the mobile AP 1 transmits the movement notification information including the movable information to the mobile terminal 3. When the received notification information is the movement notification information received from the movable mobile AP 1, the mobile terminal 3 acquires the movement position information indicating the position of the mobile AP 1 from the mobile AP 1, and the received notification information is In the case of the fixed notification information received from the fixed AP 2 that cannot move, the fixed position information indicating the position of the fixed AP 2 is acquired from the position information server 4. By doing in this way, even if the mobile terminal 1 moves the mobile AP 1 and the location information stored in the location information server 4 does not indicate the latest location, the mobile terminal 1 can accurately Movement position information indicating the position can be acquired. And the portable terminal 3 can estimate a present position with high precision by estimating a present position based on the acquired movement position information.

  Further, by using the first movement notification information and the second movement notification information as the movement notification information, the portable terminal 3 can acquire the position information of the mobile AP 1 without transmitting a request for position information. An increase in power consumption of the terminal 3 can also be suppressed.

  Furthermore, by using the first movement notification information and the second movement notification information, the mobile AP 1 notifies the mobile terminal 3 according to the present embodiment of the movement position information while communicating with the conventional mobile terminal. be able to. Specifically, since the first mobile notification information has a format equivalent to that of conventionally used notification information, when the conventional mobile terminal receives the first movement notification information, it recognizes that the SSID is “mob * 123456”. . On the other hand, when the mobile terminal 3 according to the present embodiment receives the first movement notification information, the mobile terminal 3 recognizes that the SSID is “123456” and the second movement notification information should be received. it can. As described above, by using the first movement notification information and the second movement notification information, the mobile terminal 3 according to the present embodiment can accurately determine the current position without affecting the conventional mobile terminal. Can be estimated.

<Second Embodiment>
FIG. 5 is a diagram illustrating a communication sequence according to the second embodiment. In the communication sequence illustrated in FIG. 4, the mobile AP 1 transmits the movement notification information including the movement position information without receiving a request from the mobile terminal 3. On the other hand, the communication sequence shown in FIG. 5 differs from the communication sequence shown in FIG. 4 in that the mobile AP 1 does not transmit the movement position information until it receives a request from the portable terminal 3.

  The mobile AP 1 broadcast-transmits movement notification information in which a predetermined flag bit is set to a predetermined value as the movable information. The portable terminal 3 stores the SSID included in the received movement notification information in the storage unit 32 (S11). Here, when the portable terminal 3 has not received the fixed notification information of the fixed AP 2 (S12), the mobile terminal 3 transmits a movement position information request to the mobile AP 1. For example, the portable terminal 3 requests LCI (Location Configuration Information) defined in IEEE802.11k. In S2, when the mobile terminal 3 has received the fixed notification information of the fixed AP 2 and can acquire the fixed location information by making a location information request to the location information server 4, the mobile terminal 3 Do not request location information.

  The mobile AP 1 transmits the movement position information to the mobile terminal 3 when receiving the movement position information request. The mobile AP 1 stores the received movement position information in the storage unit 32 in association with the SSID (S3). The subsequent operation is equivalent to the communication sequence shown in FIG.

[Effects of Second Embodiment]
The mobile AP 1 according to the second embodiment transmits the movement position information in response to receiving a request from the mobile terminal 3. Accordingly, since the mobile AP 1 can reduce the frequency of transmitting the movement position information as compared with the first embodiment, the power consumption of the mobile AP 1 can be reduced.

<Third Embodiment>
FIG. 6 is a diagram illustrating a configuration of a wireless communication system S according to the third embodiment. The wireless communication system S according to the present embodiment is the same as the wireless communication system S shown in FIG. 1 in that a location notification AP5 and a data communication AP6 installed in the vehicle R communicate with the mobile terminal 3 instead of the mobile AP1. Different. In the first embodiment, the mobile AP 1 relays when the mobile terminal 3 accesses the Internet, and provides position information to the mobile terminal 3. On the other hand, the location notification AP 5 provides location information without relaying data communication when the mobile terminal 3 accesses the Internet. The data communication AP 6 is a conventional access point, and relays when the mobile terminal 3 accesses the Internet.

  The location notification AP5 has the same function as the mobile AP1 except that the data communication of the mobile terminal 3 is not relayed. In this way, by installing the position notification AP5 for providing the movement position information in the vehicle R, the mobile terminal can be used without removing or modifying the data communication AP6 conventionally installed in the vehicle R. 3 can provide movement position information.

<Fourth Embodiment>
FIG. 7 is a diagram illustrating a configuration of a wireless communication system S according to the fourth embodiment. The radio communication system S according to the present embodiment can receive RFID from a plurality of RFID transmitters 8 (8-1 to 8-n, where n is an integer) installed in the tunnel T instead of the mobile AP1. The mobile AP 7 is different from the radio communication system S shown in FIG. 1 in that the mobile AP 7 communicates with the mobile terminal 3.

  The mobile AP 7 stores position information in the storage unit 11 in advance in association with a plurality of RFID transmitters 8. The position information acquisition unit 12 of the mobile AP 7 receives the radio wave transmitted by the RFID transmitter 8 and identifies which RFID transmitter 8 of the plurality of RFID transmitters 8 is receiving the radio wave. When the mobile AP 7 specifies the RFID transmitter 8 that has received the radio wave, the mobile AP 7 estimates the current position by referring to the storage unit 11 and recognizing the position of the specified RFID transmitter 8. By doing in this way, position information can be notified to the portable terminal 3 even in a place where radio waves from GPS satellites do not reach, such as in a tunnel.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. In particular, the specific embodiments of the distribution / integration of the devices are not limited to those illustrated above, and all or a part thereof may be added in arbitrary units according to various additions or according to functional loads. It can be configured functionally or physically distributed and integrated.

1 Mobile AP
2 Fixed AP
3 Mobile terminal 4 Location information server 5 Location notification AP
6 Data communication AP
7 Mobile AP
8 RFID transmitter 11 Storage unit 12 Position information acquisition unit 13 Mobile radio unit 14 Radio unit 15 Control unit 31 Display unit 32 Storage unit 33 Mobile radio unit 34 Radio unit 35 Control unit 151 Notification information generation unit 152 Transmission unit 153 Reception unit 351 Transmission unit 352 Reception unit 353 Acquisition unit 354 Position estimation unit S Wireless communication system

Claims (12)

A wireless communication system comprising a mobile terminal and a movable mobile access point capable of wireless communication with the mobile terminal,
The mobile access point is
An RFID (Radio Frequency Identifier) transmitter that transmits an RFID, and a storage unit that associates and stores position information indicating the position of the RFID transmitter;
A position information acquisition unit that estimates a current position indicated by movement position information based on a position of the RFID transmitter indicated by the position information associated with the received RFID ;
A transmission unit for transmitting movement notification information including movable information indicating that it is movable;
Have
The portable terminal is
A receiving unit for receiving the mobile broadcast information from the mobile access point and receiving the fixed broadcast information not including the movable information from a fixed access point other than the mobile access point;
A terminal storage unit that stores the moving position information in association with the moving access point, and stores the fixed position information in association with the fixed access point;
When the receiving unit receives the mobile broadcast information, the mobile location information of the mobile access point is acquired by the first method, and when the receiving unit receives the fixed broadcast information, the second method When acquiring the fixed position information indicating the position of the fixed access point and acquiring the movement position information from the moving access point, the moving position information stored in the terminal storage unit in association with the moving access point is obtained. An acquisition unit to be updated ;
Comprising
Wireless communication system. The acquisition unit
When the receiving unit receives the movement notification information, the movement position information is acquired from the moving access point,
When the receiving unit receives the fixed notification information, the fixed position information is acquired from an external device that stores the position information of the fixed access point.
The wireless communication system according to claim 1. Based on the position information selected based on the radio field intensity of the movement notification information and the radio field intensity of the fixed notification information among the plurality of movement position information and the fixed position information acquired by the acquisition unit, the current position is determined. A position estimation unit for estimation;
The wireless communication system according to claim 1 or 2. The transmission unit transmits first movement notification information including identification information of the mobile access point and the movable information, and second movement notification information including the movement position information as the movement notification information.
The radio | wireless communications system of any one of Claim 1 to 3. The acquisition unit acquires the movement position information included in the second movement notification information when detecting the movable information included in the first movement notification information.
The wireless communication system according to claim 4. When the acquisition unit receives the movement notification information, the acquisition unit requests the movement position information from the mobile access point.
The radio | wireless communications system of any one of Claim 1 to 3. A wireless access point capable of wireless communication with a mobile terminal,
A storage unit that associates and stores RFID transmitted by the RFID transmitter and position information indicating the position of the RFID transmitter;
A position information acquisition unit that estimates a current position indicated by movement position information based on a position of the RFID transmitter indicated by the position information associated with the received RFID ;
A transmission unit that transmits movement notification information including movable information indicating that the portable terminal is movable;
Having
Wireless access point. The transmission unit transmits first movement notification information including identification information of the wireless access point and the movable information, and second movement notification information including the position information as the movement notification information.
The wireless access point according to claim 7 . The mobile broadcast information including the mobile information indicating that the mobile is movable is received from the mobile access point that is movable, and the fixed broadcast information not including the mobile information is received from a fixed access point other than the mobile access point. A receiving unit for receiving;
A terminal storage unit that stores the moving position information in association with the moving access point, and stores the fixed position information in association with the fixed access point;
When the receiving unit receives the mobile notification information, the mobile unit obtains moving position information indicating the position of the mobile access point by the first method, and when the receiving unit receives the fixed notification information, When the fixed position information indicating the position of the fixed access point is acquired by the method, and the moving position information is acquired from the moving access point, the moving position stored in the terminal storage unit in association with the moving access point An acquisition unit for updating information ;
Comprising
Mobile device. The acquisition unit
When the receiving unit receives the movement notification information, the movement position information is acquired from the moving access point,
When the receiving unit receives the fixed notification information, the fixed position information is acquired from an external device that stores the position information of the fixed access point.
The mobile terminal according to claim 9 . Based on the position information selected based on the radio field intensity of the movement notification information and the radio field intensity of the fixed notification information among the plurality of movement position information and the fixed position information acquired by the acquisition unit, the current position is determined. A position estimation unit for estimation;
The mobile terminal according to claim 9 or 10 . A movable mobile access point that can communicate wirelessly with a mobile device
A procedure for storing the RFID transmitted by the RFID transmitter in association with the position information indicating the position of the RFID transmitter;
Estimating the current position indicated by the movement position information based on the position of the RFID transmitter indicated by the position information associated with the received RFID ;
A procedure for transmitting movement notification information including movable information indicating that it is movable;
Run
The mobile terminal is
A procedure for acquiring the movement position information of the mobile access point by a first method when the movement notification information is received;
Storing the moving position information in association with the moving access point, and storing the fixed position information in association with the fixed access point;
When fixed notification information not including the movable information is received from a fixed access point other than the mobile access point, the fixed access information indicating the position of the fixed access point is acquired by the second method, and the mobile access point Acquiring the movement position information from the procedure , updating the movement position information stored in association with the movement access point ,
Run the
Location information acquisition method.

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