JP2016019181A - Radio communication system, radio base station device, radio terminal device and data distribution device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable effective use of short-range radio communication while suppressing power consumption.SOLUTION: A radio base station device includes: a first base station communication unit which performs radio communication with a radio terminal device; a second base station communication unit which performs radio communication whose communication speed is faster and communicable range is shorter compared to those of the radio communication of the first base station communication unit, with the radio terminal device; a third base station communication unit which performs radio communication of a communicable distance equivalent to or shorter than the communicable distance of the second base station communication unit, with the radio terminal device; and a base station control unit which permits the second base station communication unit to perform radio communication with the radio terminal device, when the third base station communication unit receives, from the radio terminal device, identification information for identifying the radio terminal device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radio communication system, a radio base station apparatus, a radio terminal apparatus, and a data distribution apparatus.

  Wireless LAN is widely used as a means for transferring data at high speed, and with the spread of the wireless LAN, the number of terminals equipped with the wireless LAN has increased, and traffic through the wireless LAN has also increased (Non-patent Document 1). . Wireless LAN uses CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) as a multiple access method (Non-Patent Document 2). Therefore, when the number of terminals connected to the radio base station and traffic increase, there arises a problem that the throughput decreases. In addition to the 2.4 GHz band and 5 GHz band conventionally used in wireless LAN, it has been reported that a 60 GHz band is newly used (Non-patent Document 3).

  When the number of terminals that connect to a wireless base station using a wireless LAN and perform data transfer increases, the throughput decreases. Alternatively, even when the number of terminals connected to the radio base station is small, other radio base stations that use the same frequency band or the same channel are operated in the vicinity, or Bluetooth (registered trademark) that uses the same frequency band. ) And ZigBee (registered trademark) and other systems (Non-Patent Documents 4 and 5) are operated in the vicinity, the throughput is reduced.

  Here, the problem described above when performing data transmission / reception using a wireless LAN will be described using the technique described in Non-Patent Document 6 as an example. As described in Non-Patent Document 6, a case where conference participants gather in a conference room and materials are distributed to the conference participants using a wireless LAN is taken as an example. Since conference participants try to obtain documents using a wireless LAN, when there are a large number of conference participants or other wireless base stations around the conference room or other devices using the same frequency band When the system is used, the effective throughput is greatly lowered due to the influence of the reduction of communication opportunities and interference by CSMA / CA. In such a case, there may occur a problem that the material distribution is not completed by a desired time.

  To solve this problem, high-speed communication is realized using a frequency band to which a wide band is allocated, and short-range wireless communication that can limit the number of terminals that can simultaneously communicate by narrowing the communication area. Realization can solve the problem. On the other hand, when a wireless communication method in which the communication distance is limited to a close area is applied to a terminal (for example, a smartphone or a PDA), communication is attempted if the communication partner device and the terminal are in a communicable state. Since it is necessary to install the terminal at a position close to the partner apparatus, the terminal may not be used at a position where the user can easily operate the terminal. At this time, it is difficult for the user to operate the terminal while maintaining a state where the communication partner apparatus and the terminal can communicate. As a technique for such a case, there is a technique described in Patent Document 1.

  In the technique described in Patent Document 1, the wireless mode is switched using the position estimation of the terminal. For example, when the position of a terminal is estimated using a mobile terminal network and GPS, the position error may be 300 m or more (Non-Patent Document 7). Alternatively, a plurality of position estimation methods using radio waves of a wireless LAN have been proposed, but it is difficult to perform highly accurate position estimation even using radio waves of a plurality of wireless LAN radio base stations (non- Patent Document 8). In the method of switching the radio mode using these position estimations, a radio using short-range radio communication by detecting a distance of several centimeters to several tens of centimeters from a radio base station at which short-range radio communication can be used. Difficult to switch to mode.

  Alternatively, if the second wireless mode for performing short-range wireless communication is always operated, it is possible to receive a signal transmitted from the wireless base station and switch the wireless mode to the second wireless mode. However, in this case, it is necessary to always operate the second wireless mode, which increases power consumption in the terminal. In particular, in a portable terminal that supplies power using a battery or the like, there is a problem that when the power consumption increases, the usable time of the terminal is shortened.

Japanese Patent No. 5411068

"Document 1-4 Current Status of Wireless LAN", [online], March 23, 2012, Ministry of Internal Affairs and Communications, Wireless LAN Business Study Group (1st), [Search June 23, 2014], Internet < URL: http://www.soumu.go.jp/main_content/000152595.pdf> Masahiro Morikura, Shuji Kubota [supervised], "Revised Third Edition 802.11 High-Speed Wireless LAN Textbook", Impress R & D, March 2008 "Multi-gigabit, low latency connectivity. Coming in 2015", [online], Wi-Fi Alliance, [Search June 23, 2014], Internet <URL: http://www.wi-fi.org/ discover-wi-fi / wigig-certified> "Bluetooth Special Interest Group Official Member Website", Bluetooth SIG, Inc., [Search June 23, 2014], Internet <URL: https://www.bluetooth.org/ja-jp> "ZigBee Alliance Official Homepage", ZigBee Alliance, [Search June 23, 2014], Internet <URL: http://www.zigbee.org/> "Paperless Conference SmoothMeeting using iPad Tablet", NEC Nets SCI Inc., [Search June 23, 2014], Internet <URL: http://www.nesic.co.jp/solution/sp/sm.html > “Positioning method”, NTT DOCOMO, Inc. [Search June 23, 2014], Internet <URL: https://www.nttdocomo.co.jp/service/safety/search/usage/gps/> Yusuke Nitta, Shigeyoshi Ohno, “Comparative study of location estimation methods using wireless LAN access points”, Bulletin of Vocational Ability Development University, No. 41A, March 2012

  In view of the above circumstances, an object of the present invention is to provide a wireless communication system, a wireless base station device, a wireless terminal device, and a data distribution device that enable effective use of short-range wireless communication while suppressing power consumption. Yes.

  One aspect of the present invention is a wireless communication system including a wireless base station device and one or more wireless terminal devices, wherein the wireless base station device performs wireless communication with the wireless terminal device. A second base station communication unit that performs wireless communication with the wireless terminal device at a higher communication speed than the wireless communication of the first base station communication unit and a short communicable distance; and the second base station A third base station communication unit that performs wireless communication with the wireless terminal device at a communication distance equal to or shorter than a communicable distance of the communication unit, the first base station communication unit, and a second base A base station control unit that controls a station communication unit and a third base station communication unit, and the wireless terminal device includes: a first terminal communication unit that performs wireless communication with the first base station communication unit; The first terminal communication unit can perform wireless communication with the wireless base station device. A second terminal communication unit that communicates with the second base station communication unit and communicates wirelessly with the second base station communication unit, and consumption during standby and communication from the first terminal communication unit and the second terminal communication unit A third terminal communication unit that transmits identification information to the third base station communication unit when power is small and is located within a communicable distance of the third base station communication unit, and the base station control unit includes: When the third base station communication unit detects the proximity of the wireless terminal device by receiving the identification information, the wireless communication with the wireless terminal device is permitted to the second base station communication unit. Is a wireless communication system.

  One aspect of the present invention is the wireless communication system, wherein the wireless base station device is key information transmitted from the first base station communication unit to the wireless terminal device, and the second base station. The communication unit further includes a storage unit that stores key information used for wireless communication with the second terminal communication unit and the identification information of the wireless terminal device in association with each other. When the identification information is acquired via the base station communication unit, the key information corresponding to the acquired identification information is read from the storage unit, and the read key information is set in the second base station communication unit. The second base station communication unit performs connection authentication or encryption of transmission / reception data using the key information set by the base station control unit, and the second terminal communication unit transmits the first terminal communication unit. Whether the terminal communication unit is the first base station communication unit And performing encryption of the received authentication or receiving data connection using the key information.

  According to another aspect of the present invention, in the above wireless communication system, the base station control unit identifies the second terminal communication unit of each of the wireless terminal devices via the first base station communication unit. A node identifier is acquired, and wireless communication with the second terminal communication unit indicated by the acquired node identifier is permitted to the second base station communication unit.

  One aspect of the present invention is the wireless communication system, wherein the wireless terminal device determines whether or not the wireless terminal device is located within a communicable distance of the third base station communication unit. The determination is made based on the output of the communication unit, and when the own device is not located within the communicable distance of the third base station communication unit, the second terminal communication unit is stopped, and the own device stops the third base station. The second terminal communication unit is activated when it is located within a communicable distance of the station communication unit.

  One embodiment of the present invention is characterized in that, in the above wireless communication system, the second base station communication unit does not perform wireless communication simultaneously with the plurality of second terminal communication units.

  One embodiment of the present invention is a radio base station apparatus in a radio communication system including a radio base station apparatus and one or more radio terminal apparatuses, wherein the first base station performs radio communication with the radio terminal apparatus. A second base station communication unit that performs wireless communication with the wireless terminal device at a higher communication speed than the wireless communication of the first base station communication unit and a short communicable distance; and the second base station A third base station communication unit for performing wireless communication with the wireless terminal device at a communication distance equal to or shorter than a communicable distance of the communication unit; and the third base station communication unit is the wireless terminal device And a base station control unit that permits the second base station communication unit to perform radio communication with the radio terminal device when receiving identification information for identifying the radio terminal device. It is a station device.

  One embodiment of the present invention is a wireless terminal device in a wireless communication system including a wireless base station device and one or more wireless terminal devices, wherein the first terminal communication performs wireless communication with the wireless base station device. Wireless communication with the wireless base station device, and the first terminal communication unit wirelessly communicates with the wireless base station device. The second terminal communication unit that performs radio communication with the radio base station device when in communication, and a communicable distance that is equal to or shorter than the communicable distance of the second terminal communication unit, When the wireless base station device is located within a communicable distance with less power consumption during standby and communication than the first terminal communication unit and the second terminal communication unit, identification information is transmitted to the wireless base station device. 3 Terminal communication part A wireless terminal apparatus comprising: a.

  One embodiment of the present invention is a data distribution device that distributes data to a mobile terminal device including a second terminal communication unit and a third terminal communication unit, the data and the data distribution target A storage unit that stores the identification information stored in the third terminal communication unit of the mobile terminal device and the node identifier of the second terminal communication unit in association with each other, and the second terminal communication unit and the wireless communication The mobile terminal device is provided with a second base station communication unit that performs communication, a third base station communication unit that acquires the identification information from the third terminal communication unit, and the third base station communication unit When the identification information is acquired from the third terminal communication unit, data and a node identifier corresponding to the identification information are detected from the storage unit, and addressed to the second terminal communication unit indicated by the detected node identifier. , Detecting the detected data A data distribution apparatus and a control unit for transmitting to the station the communication unit.

  According to the present invention, the second base station communication unit and the second terminal communication are triggered by wireless communication with a short communicable distance between the third base station communication unit and the third terminal communication unit and low power consumption. Because the wireless communication with the communication unit is fast, the period for operating the second terminal communication unit in the wireless terminal device can be shortened, and the short-range wireless communication can be effectively used while suppressing the power consumption. become. Further, before the second base station communication unit and the second terminal communication unit perform wireless communication, information for identifying each other device by wireless communication between the first base station communication unit and the first terminal communication unit When the control information including the above is exchanged, the second base station communication unit and the second terminal communication unit can start wireless communication as soon as communication is possible. In this case, the second terminal communication communicated by the second base station communication unit by using the exchanged control information and the identification information used by the third base station communication unit and the third terminal communication unit. The number of parts can be limited to one or a predetermined number or less.

It is a block diagram which shows the structure of the radio | wireless communications system in 1st Embodiment. It is a sequence diagram which shows the operation example of the radio | wireless communications system in 1st Embodiment. It is a figure which shows an example of the information which the memory | storage part 15 of the wireless base station apparatus 10 in 1st Embodiment memorize | stores. It is a flowchart which shows the communication processing which the wireless base station apparatus 10 in 1st Embodiment performs. It is a sequence diagram which shows operation | movement of the modification 1 of the radio | wireless communications system of 1st Embodiment. It is a sequence diagram which shows operation | movement of the modification 2 of the radio | wireless communications system of 1st Embodiment. It is a figure which shows an example of the information which the memory | storage part 15 memorize | stores in the modification 2 of 1st Embodiment. 10 is a flowchart showing a communication process performed by a radio base station apparatus 10 in Modification 2. It is a block diagram which shows the structure of the radio | wireless communications system in 2nd Embodiment. It is a figure which shows an example of the reservation screen of the meeting room in the reservation terminal device 104 of 2nd Embodiment. It is a figure which shows an example of the meeting information memorize | stored in the data storage part 103 of 2nd Embodiment. It is a figure which shows an example of the delivery information memorize | stored in the memory | storage part 15 of 2nd Embodiment. It is a flowchart which shows the delivery process which the data delivery apparatus 110 in 2nd Embodiment performs. It is a sequence diagram which shows the operation example of the radio | wireless communications system in 2nd Embodiment.

  Hereinafter, a radio communication system, a radio base station apparatus, a radio terminal apparatus, and a data distribution apparatus according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram illustrating a configuration of a wireless communication system according to the first embodiment. As shown in the figure, the wireless communication system of the first embodiment includes a wireless base station device 10, one or a plurality of wireless terminal devices 20 (20-1 to 20-n), and an authentication server 30. Prepare. The radio base station apparatus 10 and the authentication server 30 are connected to be communicable.

  The radio base station apparatus 10 includes a first base station communication unit 11, a second base station communication unit 12, an RFID reader 13, a base station control unit 14, and a storage unit 15. The first base station communication unit 11 performs wireless communication with a plurality of wireless terminal devices 20 using a predetermined frequency band. The first base station communication unit 11 performs wireless communication with a plurality of wireless terminal devices 20 based on, for example, a standard defined in a wireless LAN.

  The second base station communication unit 12 performs wireless communication with a plurality of wireless terminal devices 20 using a predetermined frequency band. The communication speed of the second base station communication unit 12 is faster than the communication speed of wireless communication performed by the first base station communication unit 11 with the wireless terminal device 20. Further, the distance at which the second base station communication unit 12 can wirelessly communicate with the wireless terminal device 20 is shorter than the distance at which the first base station communication unit 11 can wirelessly communicate with the wireless terminal device 20.

  The RFID reader 13 as the third base station communication unit detects an electromagnetic induction type RFID tag and performs wireless communication with the detected RFID tag. The distance at which the RFID reader 13 can wirelessly communicate with the RFID tag is shorter than the distance at which the second base station communication unit 12 can wirelessly communicate with the wireless terminal device 20, or substantially the same distance. That is, the relationship between the communicable distances D1, D2, and D3 of the first base station communication unit 11, the second base station communication unit 12, and the RFID reader 13 is D1> D2 ≧ D3.

  The frequency band used by the RFID reader 13 for wireless communication with the RFID tag is different from the frequency band used by the first base station communication unit 11 and the second base station communication unit 12 for wireless communication. The RFID reader 13 transmits a signal requesting a response to the RFID tag continuously or periodically, and detects the RFID tag located in an area where it can communicate.

  The base station control unit 14 controls the first base station communication unit 11, the second base station communication unit 12, and the RFID reader 13. The base station control unit 14 stores the information acquired through the first base station communication unit 11, the second base station communication unit 12, and the RFID reader 13 and the information acquired from the authentication server 30 in the storage unit 15. . In addition, the base station control unit 14 uses the information stored in the storage unit 15 to control the first base station communication unit 11, the second base station communication unit 12, and the RFID reader 13.

  Each of the plurality of wireless terminal devices 20 includes a first terminal communication unit 21, a second terminal communication unit 22, an RFID tag 23, and a terminal control unit 24. The first terminal communication unit 21 performs radio communication with the first base station communication unit 11 included in the radio base station device 10. The second terminal communication unit 22 performs radio communication with the second base station communication unit 12 included in the radio base station device 10. The speed of the radio communication performed by the second terminal communication unit 22 with the second base station communication unit 12 of the radio base station apparatus 10 is the first terminal communication unit 21 of the first radio base station apparatus 10. It is faster than the speed of wireless communication performed with the base station communication unit 11. Further, the distance at which the second terminal communication unit 22 can wirelessly communicate with the second base station communication unit 12 of the radio base station apparatus 10 is such that the first terminal communication unit 21 is the first base station of the radio base station apparatus 10. It is shorter than the distance that can be wirelessly communicated with the communication unit 11.

  The RFID tag 23 as the third terminal communication unit is an electromagnetic induction type RFID tag. The RFID tag 23 stores RFID information that can be uniquely identified. The plurality of wireless terminal devices 20 can be uniquely identified by the RFID information stored in the RFID tag 23 provided in each. The RFID tag 23 performs wireless communication with the RFID reader 13 included in the wireless base station device 10. Is the distance at which the RFID tag 23 can wirelessly communicate with the RFID reader 13 of the wireless base station device 10 shorter than the distance at which the second terminal communication unit 22 can wirelessly communicate with the second base station communication unit 12 of the wireless base station device 10? Is almost the same. Further, the power consumption of the RFID tag 23 is smaller than the power consumption during standby and communication of the first terminal communication unit 21 and the second terminal communication unit 22. When receiving a signal requesting a response from the RFID reader 13, the RFID tag 23 transmits a response signal including the stored RFID information to the RFID reader 13.

  The terminal control unit 24 controls the first terminal communication unit 21, the second terminal communication unit 22, and the RFID tag 23.

  The authentication server 30 performs mutual authentication information for determining whether or not the connection request received by the wireless base station device 10 from the wireless terminal device 20 is encrypted, and encryption processing in wireless communication between the wireless base station device 10 and the wireless terminal device 20. The key information used, the RFID information associated with the key information, and the identification information of the wireless terminal device 20 are stored in advance. The first base station communication unit 11 of the radio base station apparatus 10 and the first terminal communication unit 21 of the radio terminal apparatus 20 perform encrypted radio communication by sharing key information. In addition, the second base station communication unit 12 of the radio base station device 10 and the second terminal communication unit 22 of the radio terminal device 20 perform encrypted radio communication by sharing key information.

Upon receiving an inquiry from the radio base station apparatus 10, the authentication server 30 responds based on the stored information. For example, when receiving an inquiry including identification information of the wireless terminal device 20 from the wireless base station device 10, the authentication server 30 transmits a response including key information corresponding to the identification information to the wireless base station device 10. As a protocol between the authentication server 30 and the radio base station apparatus 10, for example, the Radius protocol described in Reference Document 1 may be used.
[Reference 1] Jonathan Hassell (Author), Axense Technology (translation), "RADIUS-User Authentication Security Protocol", O'Reilly Japan, March 2009

  Here, the operation of the wireless communication system in the first embodiment will be described. FIG. 2 is a sequence diagram illustrating an operation example of the wireless communication system according to the first embodiment. In the following description, wireless communication in which the first base station communication unit 11 and the first terminal communication unit 21 are used is referred to as a wireless mode A. The wireless communication in which the second base station communication unit 12 and the second terminal communication unit 22 are used is referred to as a wireless mode B.

  When the wireless terminal device 20 is located in a communicable area of the first base station communication unit 11 included in the wireless base station device 10, the first base station communication unit 11 of the wireless base station device 10 and the wireless terminal device 20 Mutual authentication is performed to determine whether or not connection is possible in the wireless mode A using the first terminal communication unit 21 (step S11).

  In the mutual authentication (connection / authentication) in step S11, for example, the base station control unit 14 of the radio base station apparatus 10 authenticates whether or not the identification information transmitted from the radio terminal apparatus 20 is stored in the authentication server 30. This is done by inquiring the server 30. The base station control unit 14 uses the key information included in the response to the inquiry in the wireless communication in the wireless mode A and the wireless mode B. The key information used in the wireless mode A and the key information used in the wireless mode B may be the same key information or different key information. Alternatively, key information may not be used in wireless communication in the wireless mode A.

  In addition, for example, the first base station communication unit 11 of the radio base station device 10 periodically detects whether or not the radio terminal device 20 is located in a communicable region of the first base station communication unit 11. This is performed by receiving a connection request from the first terminal communication unit 21 of the wireless terminal device 20 based on the beacon signal transmitted to the terminal. Alternatively, the first terminal communication unit 21 of the wireless terminal device 20 receives the connection request transmitted to the wireless base station device 10.

  In the radio base station apparatus 10, the first base station communication unit 11 transmits a signal requesting radio terminal information to the radio terminal apparatus 20 after authentication in the radio mode A (step S12). Here, the wireless terminal information is information including RFID information stored in the RFID tag 23 included in the wireless terminal device 20 and identification information for uniquely identifying the wireless terminal device 20.

  In the wireless terminal device 20, the terminal control unit 24 reads the RFID information stored in the RFID tag 23 when the first terminal communication unit 21 receives a signal requesting wireless terminal information from the wireless base station device 10. The terminal control unit 24 outputs information including the read RFID information and identification information for identifying the device itself to the first terminal communication unit 21. The first terminal communication unit 21 transmits wireless terminal information including information output from the terminal control unit 24 to the wireless base station apparatus 10 as a response (step S13).

  In the radio base station apparatus 10, the first base station communication unit 11 receives the radio terminal information transmitted by the radio terminal apparatus 20. The base station control unit 14 stores the identification information and RFID information of the wireless terminal device 20 included in the received wireless terminal information in association with the key information used in the wireless mode A and the wireless mode B acquired in step S11. 15 is stored. (Step S14). When the wireless terminal information or the like is stored in the storage unit 15, the first base station communication unit 11 stores information indicating that the storage of the wireless terminal information is completed and the keys for the wireless mode A and the wireless mode B A completion signal including the information is transmitted to the wireless terminal device 20 (step S15).

  In the wireless terminal device 20, when the first terminal communication unit 21 receives the completion signal, the terminal control unit 24 sets the wireless mode B key information included in the completion signal in the second terminal communication unit 22. 2 is activated (step S20). Here, the activation of the second terminal communication unit 22 is a state in which the second terminal communication unit 22 can start radio communication with the second base station communication unit 12 of the radio base station apparatus 10.

  When the wireless terminal device 20 comes close to the wireless base station device 10, the RFID reader 13 detects the RFID tag 23 provided in the wireless terminal device 20 in the wireless base station device 10 (step S21). The base station control unit 14 collates whether the RFID information of the RFID tag 23 detected by the RFID reader 13 and the identification information and key information associated with the RFID information are stored in the storage unit 15 (step) S22).

  The base station control unit 14 reads the wireless mode B key information associated with the RFID information from the storage unit 15. The base station control unit 14 sets the read key information in the second base station communication unit 12 and activates the second base station communication unit 12 (step S23). By setting the key information, the second base station communication unit 12 can perform wireless communication with the wireless terminal device 20 corresponding to the key information. At this time, the second base station communication unit 12 cannot perform wireless communication with the other wireless terminal device 20 because the key information of the wireless mode B of the other wireless terminal device 20 is not set. Both the second base station communication unit 12 included in the wireless base station device 10 and the second terminal communication unit 22 included in the wireless terminal device 20 are activated to enable connection and authentication in the wireless mode B. Become. That is, the base station control unit 14 permits the second base station communication unit 12 to perform wireless communication with the wireless terminal device 20 corresponding to the identification information or key information.

  When the wireless terminal device 20 is located in a communicable area of the second base station communication unit 12 provided in the wireless base station device 10, the second base station communication unit 12 of the wireless base station device 10 and the wireless terminal device 20 Mutual authentication is performed to determine whether or not connection is possible in the wireless mode B using the second terminal communication unit 22 (step S24).

  After mutual authentication, the second base station communication unit 12 of the radio base station device 10 and the second terminal communication unit 22 of the radio terminal device 20 perform radio communication with each other, whereby the radio base station device 10 and the radio terminal Transmission / reception of data in the wireless mode B with the device 20 is performed (step S25). In the wireless terminal device 20, when the transmission / reception of the data in the wireless mode B is completed, the terminal control unit 24 stops the second terminal communication unit 22 (step S26). The stop of the second terminal communication unit 22 is either a state where the second terminal communication unit 22 does not transmit or receive, or a state where power supply to the second terminal communication unit 22 is stopped. Also good.

  FIG. 3 is a diagram illustrating an example of information stored in the storage unit 15 of the radio base station apparatus 10 according to the first embodiment. The identification information of the wireless terminal device 20, the wireless mode A key information, the wireless mode B key information, and the RFID information are associated with each wireless terminal device 20 and stored in the storage unit 15.

  The identification information of the wireless terminal device 20 is obtained by the base station control unit 14 from the wireless terminal device 20 via the first base station communication unit 11 in the mutual authentication or reception of the wireless terminal information in the first base station communication unit 11. get. The key information for the wireless mode A and the key information for the wireless mode B are acquired from the authentication server 30 by the base station control unit 14 when the first base station communication unit 11 performs mutual authentication with the wireless terminal device 20 in step S11. To do. The RFID information is acquired by the base station control unit 14 from the wireless terminal information received by the first base station communication unit 11. The base station control unit 14 stores the acquired information in the storage unit 15 in association with each other as shown in FIG. The key information may be randomly generated by the radio base station apparatus 10 instead of being acquired from the authentication server 30, or may be acquired using another known method.

The wireless base station device 10 uses the wireless mode A key in the mutual authentication by the first base station communication unit 11, the request and response of wireless terminal information, and the transmission and reception of messages with the wireless terminal device 20 in the transmission and reception of the completion signal Information and wireless mode B key information. In the wireless terminal device 20, the terminal control unit 24 sets the key information of the wireless mode A received from the wireless base station device 10 by the first terminal communication unit 21 in the first terminal communication unit 21 and also receives the received wireless The mode B key information is set in the second terminal communication unit 22. The radio base station apparatus 10 may use 3-communication AKE using a digital signature described in Reference 2 as a protocol for notifying the radio terminal apparatus 20 of key information in the radio mode B.
[Reference 2] Tatsuaki Okamoto, “Key Exchange: Birth and Development of Modern Cryptography”, IEICE Fundamental / Boundary Society Fundamental Reviews Vol.1 No.4, 2007

  FIG. 4 is a flowchart illustrating communication processing performed by the radio base station apparatus 10 according to the first embodiment. When the communication process is started and the wireless terminal device 20 is located in a communicable area of the first base station communication unit 11, the first base station communication unit 11 transmits the first terminal communication unit 21 of the wireless terminal device 20. Mutual authentication is performed between the two (step S101).

  The base station control unit 14 determines whether or not the first base station communication unit 11 has succeeded in mutual authentication (step S102). If the mutual authentication is not successful (step S102: NO), the base station control unit 14 ends the communication process. When the mutual authentication is successful (step S102: YES), the first base station communication unit 11 is an RFID tag included in the wireless terminal device 20 through wireless communication with the first terminal communication unit 21 of the wireless terminal device 20. 23 is acquired, and the key information used by the second base station communication unit 12 is notified to the wireless terminal device 20 (step S103).

  When the RFID reader 13 detects the RFID tag 23 provided in the wireless terminal device 20 (step S104), the base station control unit 14 stores the RFID information of the RFID tag 23 detected by the RFID reader 13 in the storage unit 15. The key information of the wireless mode B corresponding to the wireless terminal device 20 is searched (step S105).

  The base station control unit 14 determines whether or not the wireless mode B key information corresponding to the detected wireless terminal device 20 exists in the storage unit 15 (step S106). When there is no wireless mode B key information (step S106: NO), the base station control unit 14 ends the communication process. When the wireless mode B key information exists (step S106: YES), the base station control unit 14 reads the key information from the storage unit 15, and sets the read key information in the second base station communication unit 12. At the same time, the second base station communication unit 12 is activated (step S107).

  The second base station communication unit 12 performs mutual authentication with the second terminal communication unit 22 of the wireless terminal device 20 using the set key information, and transmits and receives data (step S108). When the second base station communication unit 12 finishes data transmission / reception with the wireless terminal device 20, the base station control unit 14 ends the communication process.

  According to the wireless communication system in the first embodiment described above, the wireless terminal device 20 activates the second terminal communication unit 22 after wireless communication with the wireless base station device 10 is enabled in the wireless mode A. As a result, the power consumption by the second terminal communication unit 22 can be suppressed as compared with the case where the second terminal communication unit 22 is always operated. Thereby, the power consumption in the wireless mode B can be reduced, and when the power of the wireless terminal device 20 is requested by a battery or the like, the time during which the wireless terminal device 20 can operate can be extended. In addition, when the transmission / reception of data in the wireless mode B is completed, the wireless terminal device 20 can further suppress power consumption by the second terminal communication unit 22 by stopping the second terminal communication unit 22. In addition, when the electromagnetic induction method is used for the RFID reader 13 and the RFID tag 23, the communicable distance between the RFID reader 13 and the RFID tag 23 is limited. Therefore, the radio base station apparatus 10 and the radio terminal can be connected at an accurate distance. The proximity to the device 20 can be detected, and the wireless mode B can be used appropriately.

(Modification 1)
Here, different operations of the wireless communication system in the first embodiment will be described as a first modification. FIG. 5 is a sequence diagram illustrating a different operation example of the wireless communication system according to the first embodiment. The difference between the operation example illustrated in FIG. 5 and the operation example illustrated in FIG. 2 is that the condition determination process (step S33) is performed when the process of starting the second wireless communication unit (step S33) is performed in the operation of the wireless terminal device 20. S32) is provided. In each process shown in FIG. 5, the same step number is assigned to the same process as the process shown in FIG. 2, and the description of the process is omitted.

  In the wireless terminal device 20, when the first terminal communication unit 21 receives the completion signal transmitted from the wireless base station device 10 in step S15, the terminal control unit 24 stores the radio mode B key information included in the completion signal. 2 is set in the terminal communication unit 22 (step S31).

  The terminal control unit 24 determines whether or not the RFID tag 23 has received a signal requesting a response (RFID signal) from the RFID reader 13 (step S32). When the RFID signal is received (step S32: YES), the terminal control unit 24 activates the second terminal communication unit 22 (step S33).

  When the RFID signal is not received (step S32: NO), the terminal control unit 24 ends the process without activating the second terminal communication unit 22. In this case, the second base station communication unit 12 of the radio base station apparatus 10 does not perform mutual authentication and does not perform data transmission / reception because there is no mutual authentication target.

  When the wireless terminal device 20 completes the transmission and reception of data in the wireless mode B, the terminal control unit 24 determines whether or not the RFID tag 23 has received an RFID signal (step S34). When the RFID signal is not received (step S34: NO), the terminal control unit 24 stops the second terminal communication unit 22 (step S26). When the RFID signal is received (step S34: YES), the terminal control unit 24 does not stop the second terminal communication unit 22 and maintains the operation state for further data transmission / reception and the like.

  As described above, the radio terminal apparatus 20 transmits an RFID transmitted from the RFID reader 13 of the radio base station apparatus 10 in the vicinity of the radio base station apparatus 10 after completing the procedure with the radio base station apparatus 10 in the radio mode A. When the signal is detected by the RFID tag 23, the second terminal communication unit 22 is activated. By using the detection by the RFID tag 23 whose power consumption in the standby state is close to 0 to activate the second terminal communication unit 22, the power consumption in the wireless mode B can be limited during communication, and the wireless terminal device 20 The power consumption can be reduced.

  In addition, the wireless terminal device 20 stops the wireless mode B when the RFID signal detection failure that can perform proximity detection at a more accurate distance after completion of data transmission / reception in the wireless mode B is performed. The activation state of B can be limited when the wireless base station device 10 is close to the wireless base station device 10, and the power consumption of the wireless terminal device 20 can be reduced.

(Modification 2)
Further, a different operation of the wireless communication system in the first embodiment will be described as a second modification. FIG. 6 is a sequence diagram illustrating still another operation example of the wireless communication system according to the first embodiment. The difference between the operation example illustrated in FIG. 6 and the operation example illustrated in FIG. 2 is that the wireless terminal device 20 transmits the wireless terminal information including the MAC address of the own device to the wireless base station device 10, and the wireless The base station device 10 restricts wireless communication in the wireless mode B using the MAC address of the wireless terminal device 20. Corresponding to this difference, the operation example shown in FIG. 6 has step S41 and step S42 instead of step S13 and step S14 in FIG. 2, and further includes step S43 between step S22 and step S23 in FIG. Have. Here, the MAC address included in the wireless terminal information by the wireless terminal device 20 is a MAC address assigned in advance to the second terminal communication unit 22. In addition, in each process shown in FIG. 6, the same step number is attached | subjected to the process same as the process shown in FIG. 2, and the description is abbreviate | omitted.

  In the wireless terminal device 20, when the first terminal communication unit 21 receives information requesting wireless terminal information from the wireless base station device 10, the terminal control unit 24 receives the RFID information stored in the RFID tag 23, 2. Read out the MAC address previously assigned to the terminal communication unit 22 of the second. The terminal control unit 24 outputs information including the read RFID information, MAC address, and identification information to the first terminal communication unit 21. The first terminal communication unit 21 transmits wireless terminal information including information output from the terminal control unit 24 to the wireless base station apparatus 10 as a response (step S41).

  In the radio base station apparatus 10, the first base station communication unit 11 receives the radio terminal information transmitted by the radio terminal apparatus 20. The base station control unit 14 associates the identification information, RFID information, and MAC address of the wireless terminal device 20 included in the received wireless terminal information with the key information used in the wireless mode A and wireless mode B acquired in step S11. Is stored in the storage unit 15 (step S42).

  The base station control unit 14 reads the MAC address associated with the RFID information from the storage unit 15. The base station control unit 14 registers the read MAC address in the second base station communication unit 12 so that the second base station communication unit 12 receives a signal from the wireless terminal device 20 corresponding to the MAC address. Set (step S43). The base station control unit 14 performs control to cause the second base station communication unit 12 to perform MAC address filtering.

  FIG. 7 is a diagram illustrating an example of information stored in the storage unit 15 in the second modification of the first embodiment. The identification information of the wireless terminal device 20, the wireless mode A key information, the wireless mode B key information, the RFID information, and the MAC address are associated with each wireless terminal device 20 and stored in the storage unit 15. Information regarding each wireless terminal device 20 is obtained by the base station control unit 14 in the mutual authentication in the first wireless communication unit, the request and response of the wireless terminal information, and the transmission and reception of messages with the wireless terminal device 20 in the transmission and reception of the completion signal Acquired and stored in the storage unit 15.

  FIG. 8 is a flowchart illustrating communication processing performed by the radio base station apparatus 10 in the second modification. The difference between the communication process shown in FIG. 8 and the communication process shown in FIG. 4 is that the communication process shown in FIG. 8 has a process for handling the MAC address of the wireless terminal device 20. Corresponding to this difference, the operation example shown in FIG. 8 includes step S303 instead of step S103 in FIG. 4, and further includes steps S305 to S307 between step S104 and step S105 in FIG. In the communication process shown in FIG. 8, the same step number is assigned to the same process as the process shown in FIG. 4, and the description thereof is omitted.

  When the mutual authentication is successful in the determination in step S102 (step S102: YES), the first base station communication unit 11 performs wireless communication with the first terminal communication unit 21 of the wireless terminal device 20 in the wireless communication. The RFID information of the RFID tag 23 provided in the terminal device 20 and the MAC address of the second terminal communication unit 22 are acquired. In addition, the first base station communication unit 11 notifies the wireless terminal device 20 of key information used by the second base station communication unit 12 (step S303).

  When the RFID reader 13 detects the RFID tag 23 provided in the wireless terminal device 20 (step S104), the base station control unit 14 stores the RFID information of the RFID tag 23 detected by the RFID reader 13 in the storage unit 15. The MAC address corresponding to the wireless terminal device 20 is searched (step S305).

  The base station control unit 14 determines whether or not the MAC address corresponding to the wireless terminal device 20 detected by the RFID reader 13 exists in the storage unit 15 (step S306). When the MAC address does not exist (step S306: NO), the base station control unit 14 ends the communication process. When the MAC address exists (step S306: YES), the base station control unit 14 reads the MAC address from the storage unit 15, sets the read MAC address in the second base station communication unit 12, and performs wireless communication. Register as a target (step S307).

  As described above, in the radio base station apparatus 10, by using the MAC address filter of the second base station communication unit 12, the signal (packet) of the radio terminal apparatus 20 in which the MAC address is registered is received, A signal from the wireless terminal device 20 whose MAC address is not registered is not accepted. By using the MAC address filter, it is possible to prevent the unregistered wireless terminal device 20 from performing wireless communication with the wireless base station device 10 using the wireless mode B. It is possible to suppress a decrease in communication speed of wireless communication using the two base station communication units 12.

  According to the wireless communication system of the first embodiment and the wireless communication system in the modification, wireless communication is performed in the wireless mode A by the first base station communication unit 11 and the first terminal communication unit 21 having a long communicable distance. Necessary authentication or the like is performed, and the RFID reader 13 and the RFID tag 23 having a short communicable distance are used to detect that the wireless terminal device 20 is close to the wireless base station device 10. The terminal communication unit 22 is activated. As a result, the proximity of the wireless terminal device 20 to the wireless base station device 10 is detected while maintaining a communicable state between the wireless base station device 10 and the wireless terminal device 20 realized in the wireless mode A with a low communication speed. Thus, it is possible to switch to wireless communication in the wireless mode B having a high communication speed. Further, since the second terminal communication unit 22 having a high communication speed is detected after the proximity of the wireless terminal device 20 to the wireless base station device 10 is detected, the power consumption of the wireless terminal device 20 is reduced and the standby time is long. Can be realized.

  In the wireless communication system according to the first embodiment and the wireless communication systems in the modifications thereof, one or predetermined key information for the wireless mode B set in the second base station communication unit 12 of the wireless base station device 10 is used. Or less than Thereby, the number of the radio | wireless terminal apparatuses 20 with which the radio base station apparatus 10 performs radio | wireless communication via the 2nd base station communication part 12 can be limited, and increase of the radio | wireless terminal apparatuses 20 of communication object in radio | wireless mode B It is possible to avoid a significant decrease in communication speed due to. Similarly, in the second modification, the MAC address set in the second base station communication unit 12 may be one or a predetermined number or less. When the communication object of the second base station communication unit 12 is one wireless terminal device 20, data can be transmitted and received without interruption of wireless communication with the wireless terminal device 20.

  In addition, in the wireless communication system of the first embodiment and the wireless communication system in each of the modifications, the configuration in which the key information is used for data encryption has been described. However, the second base station communication unit 12 and the second terminal The communication unit 22 may be used for connection authentication, or may be used for both data encryption and authentication.

  Further, in the wireless communication system of the first embodiment and the wireless communication system in each of the modifications, the wireless base station in the response (step S13 or step S41) performed by the wireless terminal device 20 after connection / authentication in the wireless mode A The RFID information may not be included in the information transmitted to the device 10. In this case, the authentication server 30 stores the identification information and RFID information of each wireless terminal device 20 in association with each other in advance, and the base station control unit 14 performs RFID information of the wireless terminal device 20 during connection / authentication in the wireless mode A. To get.

(Second Embodiment)
FIG. 9 is a block diagram illustrating a configuration of a wireless communication system according to the second embodiment. The wireless communication system of the second embodiment distributes conference materials used in a conference to conference participants by wireless communication. As shown in FIG. 9, the wireless communication system includes a conference room management system 101, a reservation terminal device 104, a data distribution device 110, and a plurality of portable terminal devices 120 (120-1 to 120-n). The reservation terminal device 104 and the data distribution device 110 are communicably connected to the conference room management system 101. The data distribution device 110 is provided for each conference room 200 managed by the conference room management system 101 and is connected to a gate 201 installed at the entrance of the conference room 200. In the wireless communication system shown in FIG. 9, one conference room 200 is shown, but there may be a plurality of conference rooms 200. In that case, the data distribution device 110 is provided in the wireless communication system for each conference room 200.

  The conference room management system 101 includes a control unit 102 and a data storage unit 103. The control unit 102 receives conference information input by the user or operator operating the reservation terminal device 104, and stores the received conference information in the data storage unit 103. The conference information includes, for example, a conference room number that identifies the conference room 200 to be used, a start time and an end time of the conference to be held, group information indicating a group that divides the conference participants participating in the conference, and a conference to be distributed in the conference Participant information identifying the material and meeting participants is included. The control unit 102 notifies the conference information to the data distribution device 110 provided in the conference room 200 where the conference is held.

  The data distribution apparatus 110 corresponds to the radio base station apparatus 10 in the first embodiment. The data distribution device 110 includes a first base station communication unit 11, a second base station communication unit 12, an RFID reader 13, a base station control unit 114, and a storage unit 15. In the data distribution apparatus 110, the same components as those in the radio base station apparatus 10 are denoted by the same reference numerals, and the description thereof is omitted. The base station control unit 114 receives the conference information from the conference room management system 101 and causes the storage unit 15 to store distribution information obtained by extracting information used for distribution of the conference material from the received conference information. Based on the distribution information, the base station control unit 114 controls the second base station communication unit 12 and the RFID reader 13 to transmit the conference material to the mobile terminal device 120. The base station control unit 114 controls the opening / closing of the gate 201 based on the RFID information acquired by the RFID reader 13.

  The portable terminal device 120 corresponds to the wireless terminal device 20 in the first embodiment. Each conference participant owns the mobile terminal device 120. The mobile terminal device 120 includes a first terminal communication unit 21, a second terminal communication unit 22, an RFID tag 23, a terminal control unit 124, and a storage unit 125. In the mobile terminal device 120, the same components as those in the wireless terminal device 20 are denoted by the same reference numerals, and description thereof is omitted. The storage unit 125 stores conference material transmitted from the data distribution device 110. The conference material is, for example, a document, a graph, a chart, an image, or the like, and is a file that can be viewed or edited by application software.

  FIG. 10 is a diagram illustrating an example of a conference room reservation screen in the reservation terminal device 104 according to the second embodiment. The reservation screen includes a conference room number for identifying a conference room, a start time and an end time of the conference time, group information indicating a group into which conference participants are divided, conference materials distributed in the conference, and the conference A field for inputting a group to which the document is to be distributed, participant information indicating a conference participant, and a group to which the conference participant belongs is provided.

  For the participant information, RFID information stored in the RFID tag 23 of the mobile terminal device 120 of each conference participant is used. That is, in the wireless communication system according to the second embodiment, the conference participant is identified using the RFID information of the mobile terminal device 120 possessed by the conference participant.

  The organizer or operator of the conference operates the reservation terminal device 104, the conference room number, the conference start time and end time, the group information, the conference information, the group information indicating the distribution target, and the conference participants Information and group information of conference participants are set. The reservation terminal device 104 transmits conference information including information set by the organizer or the operator to the conference room management system 101. When the conference room management system 101 receives the conference information from the reservation terminal device 104, the control unit 102 stores the conference information in the data storage unit 103.

  FIG. 11 is a diagram illustrating an example of conference information stored in the data storage unit 103 according to the second embodiment. The conference information stored in the data storage unit 103 is stored separately for each conference room 200. The conference managed by the conference room management system 101 is assigned a conference ID for uniquely identifying the conference. In the data storage unit 103, the conference information is stored in association with the conference ID. As shown in FIG. 11, the conference information includes a conference ID, conference time start time and end time, conference material, group, participant information (RFID information), and MAC address.

  Since the MAC address is not included in the information input in the reservation terminal device 104, the control unit 102 acquires it and associates it with the participant information and adds it to the conference information. For example, the control unit 102 stores the RFID information in the management server that stores in advance the correspondence between the RFID information of each portable terminal device 120, the MAC address assigned to the second terminal communication unit 22, and the conference participants. It is obtained by making an inquiry using as a key. Alternatively, the conference room management system 101 may store in advance the correspondence between the RFID information of each portable terminal device 120, the MAC address assigned to the second terminal communication unit 22, and the conference participant.

  For example, a meeting held in the conference room “001” will be described. The conference held in the conference room “001” and having the conference ID 0001 has a start time “10:00 on February 24” and an end time “11:00 on February 24”. Is. In the meeting with the meeting ID “0001”, meeting materials A, B, and C are distributed.

  For the conference material A, the mobile terminal devices 120 of conference participants belonging to the groups “0001-1” and “0001-2” are registered as distribution destinations. The group “0001-1” includes conference participants having the mobile terminal devices 120 corresponding to the RFID information “111aaa”, “111aab”, and “111abc”. A conference participant having the mobile terminal device 120 corresponding to the RFID information “222aaa” and “222aab” belongs to the group “0001-2”.

  For the conference material B, the mobile terminal devices 120 of the conference participants belonging to the participant group “0001-1” are registered as distribution destinations. For the conference material C, the mobile terminal devices 120 of the conference participants belonging to the participant group “0001-2” are registered as distribution destinations. In this way, it is possible to perform settings for delivering different conference materials to conference participants who participate in the same conference according to the group to which the conference participants belong.

  FIG. 12 is a diagram illustrating an example of distribution information stored in the storage unit 15 of the second embodiment. The storage unit 15 of the data distribution device 110 stores distribution information including information necessary for distribution of the conference material extracted from the conference information transmitted from the conference room management system 101. The timing at which the conference information is transmitted from the conference room management system 101 to the data distribution apparatus 110 is the timing at which the registration of the conference information in the conference room management system 101 is completed, or a certain time before the conference start time. When the base station control unit 114 of the data distribution device 110 receives the conference information from the conference room management system 101, a conference to be held in the conference room 200 associated with the own device among the conferences included in the conference information. Extract information. Based on the extracted information, the base station control unit 114 distributes a meeting time, a meeting participant, and a MAC address in association with each meeting material distributed in a meeting held in the meeting room 200 corresponding to the own device. Information is generated, and the generated distribution information is stored in the storage unit 15.

In the example shown in FIG. 12, for the conference material A, the conference start time “February 24th 10:00” and the end time “February 24th 11:00”, and the RFID information “111aaa” and “111aab”. , “111abc”, “222aaa” and “222aab”, and MAC addresses “11: 11: 11: AA: AA: AA”, “11: 11: 11: AA: AA: BB”
“11: 11: 11: AA: BB: CC”, “22: 22: 22: AA: AA: AA”, and “22: 22: 22: AA: AA: BB” are associated with each other.

  In the example shown in FIG. 12, the conference material A is distributed to the mobile terminal devices 120 having the RFID information “111aaa”, “111aab”, “111abc”, “222aaa”, and “222aab” in accordance with the conference information shown in FIG. Is set to be. The conference material B is set to be distributed to the portable terminal devices 120 of the RFIDs “111aaa”, “111aab”, and “111abc”. The conference material C is set to be distributed to the portable terminal devices 120 having the RFIDs “222aaa” and “222aab”.

  In addition, without including the start time and end time of the conference in the distribution information stored in the storage unit 15, the base station control unit 114 inquires the conference room management system 101 about the start time and end time of the conference corresponding to each conference material. Thus, the start time and end time of the conference may be acquired each time.

  FIG. 13 is a flowchart illustrating distribution processing performed by the data distribution apparatus 110 according to the second embodiment. In the data distribution device 110, when the RFID reader 13 detects the RFID tag 23 of the mobile terminal device 120 (step S401), the base station control unit 114 determines whether or not the RFID information of the RFID tag 23 is stored in the storage unit 15. Is determined (step S402).

  When the RFID information is not stored (step S402: NO), the base station control unit 114 ends the distribution process. When RFID information is stored (step S402: YES), the base station control unit 114 determines whether or not the current time is within the holding time of the meeting corresponding to the RFID information (step S403).

  When the current time is not within the holding time (step S403: NO), the base station control unit 114 ends the distribution process. When the current time is within the holding time (step S403: YES), the base station control unit 114 reads the MAC address associated with the RFID information from the storage unit 15. The base station control unit 114 registers the read MAC address in the second base station communication unit 12 so that the second base station communication unit 12 receives a signal from the mobile terminal device 120 corresponding to the MAC address. Setting is performed (step S404).

  The second base station communication unit 12 performs a wireless communication connection with the mobile terminal device 120 including the second terminal communication unit 22 with the registered MAC address (step S405). The base station control unit 114 determines whether or not the second base station communication unit 12 has been connected to the mobile terminal device 120 (step S406).

  When the connection cannot be made (step S406: NO), the base station control unit 114 proceeds with the process to step S409. When the connection is established (step S406: YES), the base station control unit 114 determines whether or not the conference material associated with the RFID information exists in the storage unit 15 (step S407).

  When there is no associated conference material (step S407: NO), the base station control unit 114 proceeds with the process to step S409. When there is an associated conference material (step S407: YES), the base station control unit 114 reads the associated conference material from the storage unit 15. The base station control unit 114 outputs the read conference material to the second base station communication unit 12, and transmits the conference material to the mobile terminal device 120 having the registered MAC address (step S408).

  When the transmission of the conference material ends, the base station control unit 114 opens the gate 201 installed at the entrance / exit of the conference room 200 for a certain period of time, and participates in the conference having the mobile terminal device 120 of the RFID tag 23 detected in step S401 The person enters the conference room 200 (step S409), and the distribution process is terminated.

  FIG. 14 is a sequence diagram illustrating an operation example of the wireless communication system according to the second embodiment. In the conference room management system 101, when the control unit 102 receives the conference information from the reservation terminal device 104, the control unit 102 stores and registers the conference information in the data storage unit 103 (step S51). Based on the conference information stored in the data storage unit 103, the control unit 102 transmits the conference information of the conference held in each conference room 200 to each data distribution device 110 corresponding to the conference room 200 and notifies the data. (Step S52).

  In the data distribution apparatus 110, when the base station control unit 114 receives the conference information from the conference room management system 101, the base station control unit 114 generates distribution information from the conference information and stores it in the storage unit 15 (step S53).

  When the RFID reader 13 of the data distribution device 110 detects the RFID tag 23 of the mobile terminal device 120, such as when a conference participant goes to the conference room 200 with the mobile terminal device 120 (step S54), in the mobile terminal device 120 The terminal control unit 124 is notified that the RFID tag 23 has wirelessly communicated with the RFID reader 13. Upon receiving the notification from the RFID tag 23, the terminal control unit 124 activates the second terminal communication unit 22 (step S61).

  When the data distribution apparatus 110 notifies the base station control unit 114 of the RFID information of the RFID tag 23 detected by the RFID reader 13 (step S54), the base station control unit 114 stores the RFID information in the storage unit 15. It is determined whether or not the current time is within the holding time of the conference in which the conference participant corresponding to the RFID information participates (step S55).

  When the RFID information is not stored or the current time is not within the holding time (step S55: NO), the base station control unit 114 ends the processing of the detected RFID tag 23 for the portable terminal device 120. When the RFID information is stored and the current time is within the holding time (step S55: YES), the base station control unit 114 performs a wireless communication connection with the mobile terminal device 120 of the detected RFID tag 23. The second base station communication unit 12 is controlled (step S56). At this time, the second terminal communication unit 22 of the mobile terminal device 120 performs connection upon receiving a connection request from the second base station communication unit 12 of the data distribution device 110.

  In the data distribution device 110, the base station control unit 114 determines whether or not the second base station communication unit 12 can connect to the mobile terminal device 120 and whether there is conference material to be distributed to the mobile terminal device 120. A determination is made (step S57). If the connection cannot be made or there is no conference material to be distributed, the base station control unit 114 advances the process to step S59. When there is conference material that can be connected and distributed (step S57: YES), the base station control unit 114 reads the conference material to be distributed to the mobile terminal device 120 of the detected RFID tag 23 from the storage unit 15, and stores the conference material. Output to the second base station communication unit 12. The second base station communication unit 12 transmits the conference material to the mobile terminal device 120 and transfers the conference material (step S58).

  In the portable terminal device 120, when the second terminal communication unit 22 receives the conference material from the data distribution device 110 (step S58), the terminal control unit 124, after the reception of the conference material is completed, the second terminal communication unit 22 is stopped (step S62).

  In the data distribution device 110, when the second base station communication unit 12 completes the transmission of the conference material, the base station control unit 114 opens the gate 201 for a certain period of time and has the mobile terminal device 120 of the detected RFID tag 23. A conference participant enters the conference room 200 (step S59).

  In the wireless communication system according to the second embodiment described above, the terminal control unit 124 of the mobile terminal device 120 is triggered by the RFID tag 23 performing wireless communication with the RFID reader 13 of the data distribution device 110. 2 terminal communication unit 22 is activated. By using the detection by the RFID tag 23 whose power consumption in the standby state is close to 0 to activate the second terminal communication unit 22, the power consumption for receiving the conference material can be limited at the time of communication. The power consumption of the terminal device 120 can be reduced. Further, the wireless terminal device 20 can reduce the power consumption of the mobile terminal device 120 by stopping the second terminal communication unit 22 after the reception of the conference material is completed.

  The wireless base station device, the wireless terminal device, the data distribution device, and the mobile terminal device in the above-described embodiment may be realized by a computer. In that case, it is realized by recording a program for realizing each component included in each device on a computer-readable recording medium, causing the computer system to read and execute the program recorded on the recording medium. Also good. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” is a program that dynamically holds a program for a short time, like a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory inside a computer system serving as a server or a client in that case may be included and a program held for a certain period of time. Further, the program may be for realizing a part of the above-described constituent elements, and may be realized by combining the above-described constituent elements with a program already recorded in a computer system. It may be realized by using hardware such as PLD (Programmable Logic Device) or FPGA (Field Programmable Gate Array).

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

  It can also be applied to applications where effective use of near field communication is indispensable while suppressing power consumption.

DESCRIPTION OF SYMBOLS 10 ... Wireless base station apparatus 11 ... 1st base station communication part 12 ... 2nd base station communication part 13 ... RFID reader 14, 114 ... Base station control part 15 ... Memory | storage part 20, 20-1, 20-n ... Wireless terminal device 21 ... first terminal communication unit 22 ... second terminal communication unit 23 ... RFID tag 24, 124 ... terminal control unit 30 ... authentication server 101 ... conference room management system 102 ... control unit 103 ... data storage unit 104 ... Reservation terminal device 110 ... Data distribution device 120, 120-1, 120-n ... Mobile terminal device 125 ... Storage unit 200 ... Conference room 201 ... Gate

Claims (8)

A wireless communication system comprising a wireless base station device and one or more wireless terminal devices,
The wireless base station device
A first base station communication unit that performs wireless communication with the wireless terminal device;
A second base station communication unit that performs wireless communication with the wireless terminal device at a higher communication speed than a wireless communication of the first base station communication unit and a short communicable distance;
A third base station communication unit that performs wireless communication with the wireless terminal device at a communicable distance equal to or shorter than the communicable distance of the second base station communication unit;
A base station control unit that controls the first base station communication unit, the second base station communication unit, and the third base station communication unit;
The wireless terminal device
A first terminal communication unit that performs wireless communication with the first base station communication unit;
A second terminal communication unit capable of communicating when the first terminal communication unit is capable of wireless communication with the wireless base station device and performing wireless communication with the second base station communication unit;
If the power consumption during standby and communication is smaller than the first terminal communication unit and the second terminal communication unit and is located within the communicable distance of the third base station communication unit, the identification information is stored in the third base A third terminal communication unit for transmitting to the station communication unit,
The base station controller
When the third base station communication unit detects the proximity of the wireless terminal device by receiving the identification information, the second base station communication unit is permitted to perform wireless communication with the wireless terminal device. A wireless communication system. The wireless communication system according to claim 1, wherein
The wireless base station device
Key information transmitted from the first base station communication unit to the wireless terminal device and used by the second base station communication unit for wireless communication with the second terminal communication unit, and the wireless terminal device A storage unit that stores the identification information in association with each other,
The base station controller
When the identification information is acquired via the third base station communication unit, the key information corresponding to the acquired identification information is read from the storage unit, and the read key information is read from the second base station communication unit. Set to
The second base station communication unit is
Performs connection authentication or encryption of transmission / reception data using the key information set by the base station control unit,
The second terminal communication unit
The wireless communication system, wherein the first terminal communication unit performs connection authentication or encryption of transmission / reception data using the key information received from the first base station communication unit. The wireless communication system according to claim 2,
The base station controller
Obtaining a node identifier for identifying the second terminal communication unit of each of the wireless terminal devices via the first base station communication unit;
A wireless communication system, wherein wireless communication with the second terminal communication unit indicated by the acquired node identifier is permitted for the second base station communication unit. In the radio | wireless communications system as described in any one of Claims 1-3,
The wireless terminal device
It is determined based on the output of the third terminal communication unit whether the own device is located within the communicable distance of the third base station communication unit, and the own device is connected to the third base station communication unit. The second terminal communication unit is stopped when it is not located within the communicable distance, and the second terminal communication unit is activated when the own apparatus is located within the communicable distance of the third base station communication unit A wireless communication system, characterized in that In the radio | wireless communications system as described in any one of Claims 1-4,
The second base station communication unit is
A wireless communication system, wherein wireless communication is not performed simultaneously with the plurality of second terminal communication units. A radio base station apparatus in a radio communication system comprising a radio base station apparatus and one or more radio terminal apparatuses,
A first base station communication unit that performs wireless communication with the wireless terminal device;
A second base station communication unit that performs wireless communication with the wireless terminal device at a higher communication speed than a wireless communication of the first base station communication unit and a short communicable distance;
A third base station communication unit that performs wireless communication with the wireless terminal device at a communicable distance equal to or shorter than the communicable distance of the second base station communication unit;
When the third base station communication unit receives identification information for identifying the wireless terminal device from the wireless terminal device, the base that permits the second base station communication unit to perform wireless communication with the wireless terminal device A radio base station apparatus comprising: a station control unit. A wireless terminal device in a wireless communication system comprising a wireless base station device and one or more wireless terminal devices,
A first terminal communication unit for performing wireless communication with the wireless base station device;
The wireless base station device performs wireless communication with a higher communication speed and a shorter communicable distance than the wireless communication of the first terminal communication unit, and the first terminal communication unit is in wireless communication with the wireless base station device. A second terminal communication unit that performs wireless communication with the wireless base station device,
It is a communicable distance that is equal to or shorter than the communicable distance of the second terminal communication unit, and power consumption during standby and communication from the first terminal communication unit and the second terminal communication unit And a third terminal communication unit that transmits identification information to the radio base station device when the radio base station device is located within a communicable distance. A data distribution device for distributing data to a mobile terminal device comprising a second terminal communication unit and a third terminal communication unit,
A storage unit for storing the data and the identification information stored in the third terminal communication unit of the mobile terminal device to which the data is distributed and the node identifier of the second terminal communication unit in association with each other;
A second base station communication unit that performs wireless communication with the second terminal communication unit;
A third base station communication unit that obtains the identification information from the third terminal communication unit;
When the third base station communication unit obtains the identification information from the third terminal communication unit provided in the mobile terminal device, the data and the node identifier corresponding to the identification information are detected from the storage unit, A data distribution device comprising: a control unit that transmits the detected data to the second base station communication unit addressed to the second terminal communication unit indicated by the detected node identifier.

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