JP5596660B2 - Wireless communication system and wireless system setting method - Google Patents

Description

  The present invention relates to a flexible wireless system, and more particularly to a wireless communication system and a wireless system setting method using a plurality of wireless systems.

  In IEEE802.11 (for example, refer to Non-Patent Document 1), various information (information related to time synchronization) required for communication by a wireless base station in a BSS (Basic Service Set) composed of a wireless base station and a wireless terminal station. , Periodically transmit downlink notification signals (beacons) for reporting frequency channel information, power management information, QoS information, and the like. The wireless terminal station can establish synchronization with the wireless base station by receiving the beacon.

  In IEEE 802.15.4 (see, for example, Non-Patent Document 2), as an optional function, a super frame obtained by dividing a MAC frame into slots, such as a slot ALOHA, can be used. When using a superframe, information necessary for the router or coordinator to use the superframe (information related to time synchronization, information related to the superframe and beacon transmission period, information related to the slot configuration of the superframe, etc.) is broadcast. For this purpose, a downlink notification signal (beacon) is periodically transmitted. The wireless terminal station can establish synchronization with the parent node (router or coordinator) by receiving the beacon.

IEEE Std 802.11-2007 (p.419-421) IEEE Std 802.15.4-2003 (p.13-28)

  In the wireless method according to the above-described prior art, a method of establishing synchronization between a wireless terminal station and a connection destination (wireless base station, parent node, etc.) of the wireless terminal station is defined. By establishing synchronization, an uplink signal can be transmitted to the connection destination.

  In a flexible wireless system that accommodates a plurality of wireless systems, when accommodating a wireless system that requires the establishment of synchronization as described above, by transmitting a downlink notification signal corresponding to each wireless system to the wireless terminal station, It is necessary to establish synchronization with the connection destination of the wireless terminal station so that the wireless terminal station can transmit an uplink signal to the connection destination.

  However, periodically transmitting downlink notification signals corresponding to all wireless systems accommodated by the flexible wireless base station has a problem of increasing the load of the flexible wireless base station transmitting the notification signals. That is, in order for each base station to transmit a broadcast signal, it is necessary to support each wireless system. When the wireless terminal station of the wireless system is not in the vicinity of the base station, the wireless system is supported. It is itself inefficient and increases the load on the base station. Further, when a wireless terminal station that supports a certain wireless system is not in the vicinity, periodically transmitting a notification signal of the wireless system also increases the load.

  The present invention has been made in view of such circumstances, and its purpose is to reduce the load for transmitting a radio system notification signal and to flexibly support a plurality of radio systems. An object of the present invention is to provide a wireless communication system and a wireless system setting method that can be used.

  The present invention relates to a signal processing apparatus that performs management of a plurality of radio systems and broadcasts a notification signal indicating the radio system, and a base station and a terminal station that transmit and receive data using the same radio system of the plurality of radio systems A radio communication system configured to set one of the plurality of radio systems as a radio system used for data transmission / reception with the terminal station; and A transmission / reception unit that transmits / receives data to / from a terminal station that uses the same wireless method as the wireless method set by the method setting unit, and the signal processing device is a wireless method that is not set in the base station A notification means for notifying the terminal station via the base station, and a synchronization request by a wireless method not set in the base station is received from the terminal station via the base station. An instruction means for instructing the base station to set a radio system corresponding to the synchronization request from the terminal station, and the base station uses the radio system setting means to perform the signal processing. According to an instruction from the instruction means of the apparatus, a radio system corresponding to the synchronization request from the terminal station is set as a radio system used for data transmission / reception with the terminal station.

  In the present invention, the notification means notifies the terminal station of a notification signal indicating a wireless method not set in the base station, and a notification signal indicating a wireless method set by the base station by the wireless method setting means. The terminal station is notified via the base station at a lower frequency than the predetermined time interval.

  In the present invention, when the frequency of communication performed using the wireless method set by the wireless method setting means falls below a predetermined threshold, the base station cancels the wireless method setting. The apparatus further comprises means.

  The present invention uses a method management apparatus that performs management of a plurality of wireless systems and a notification signal indicating a wireless system, a signal processing device, a base station, and the same wireless system among a plurality of wireless systems, A wireless communication system including a terminal station that transmits and receives data to and from the signal processing device via the base station, wherein the signal processing device is one of the plurality of wireless systems, A wireless method setting means for setting as a wireless method used for data transmission / reception with the terminal station, and a terminal station using the same wireless method as the wireless method set by the wireless method setting means via the base station; Transmission / reception means for transmitting / receiving data between the signal management device, the method management device through the signal processing device and the base station, a notification signal indicating a wireless method not set in the signal processing device. Informing means for informing the terminal station, and when receiving a synchronization request by a wireless method not set in the signal processing apparatus from the terminal station via the base station and the signal processing apparatus, to the signal processing apparatus Instruction means for instructing setting of a radio system corresponding to the synchronization request from the terminal station, the signal processing device according to an instruction from the instruction means of the system management apparatus by the radio system setting means The wireless method corresponding to the synchronization request from the terminal station is set as a wireless method used for data transmission / reception with the terminal station.

  According to the present invention, the notification means transmits a notification signal indicating a wireless method not set in the signal processing device, and a notification signal indicating a wireless method set by the wireless method setting means by the signal processing device in the terminal station. The terminal station is notified via the signal processing device and the base station at a lower frequency than the predetermined time interval notified to the terminal.

  According to the present invention, when the frequency of communication performed using the wireless method set by the wireless method setting unit falls below a predetermined threshold, the signal processing device cancels the setting of the wireless method. It further has a release means.

  The present invention is a radio system setting method of a radio communication system composed of a signal processing device and a base station and a terminal station that transmit and receive data using the same radio system among a plurality of radio systems, A notification step in which the signal processing device notifies the terminal station of a notification signal indicating a radio system not set in the base station; and the signal processing device is set in the base station. An instruction step for instructing the base station to set a radio scheme corresponding to the synchronization request from the terminal station when a synchronization request by a non-radio scheme is received from the terminal station via the base station And the base station uses a radio scheme corresponding to the synchronization request from the terminal station for data transmission / reception with the terminal station in accordance with an instruction from the signal processing device in the instruction step. A wireless method setting step for setting as a wireless method, and the base station transmits and receives data to and from a terminal station that uses the same wireless method as the wireless method set for the base station in the wireless method setting step. And a transmission / reception step to be performed.

  The present invention relates to a method management device, a signal processing device, a base station, and a data processing between the signal processing device and the base station via the same wireless method. A radio system setting method of a radio communication system configured with a terminal station that performs transmission and reception, wherein the system management apparatus transmits a notification signal indicating a radio system not set in the signal processing apparatus to the signal processing apparatus An informing step for informing the terminal station via the base station, and a synchronization request by a radio system not set in the signal processing apparatus from the terminal station to the base station and the signal processing apparatus An instruction step for instructing the signal processing device to set a radio system corresponding to the synchronization request from the terminal station, and the signal processing device A wireless method setting step for setting a wireless method corresponding to the synchronization request from the terminal station as a wireless method used for data transmission / reception with the terminal station, according to an instruction from the method management apparatus in A transmission / reception step in which the signal processing device transmits / receives data to / from a terminal station using the same wireless method as the wireless method set in the signal processing device in the wireless method setting step via the base station; It is characterized by including.

  According to the present invention, the signal processing device transmits the notification signal indicating the wireless method that is not set to the subordinate radio base station at low frequency, so that the signal processing device and the base station transmit the notification signal. The load on the occasion can be reduced. Further, since the base station can establish synchronization with a terminal station that has newly entered the wireless communication system, transmission of an uplink signal by the terminal station can be realized. In addition, when the signal processing apparatus receives a radio system signal not set to the base station from the base station, the base station can instruct the base station to set the radio system. When the frequency of communication performed using the set wireless method falls below the threshold value, the wireless method can be canceled, so that a plurality of wireless methods can be flexibly handled.

  In addition, according to the present invention, the method management device transmits the notification signal indicating the wireless method that is not set in the subordinate signal processing device at a low frequency, so in the method management device, the signal processing device, and the base station, The load at the time of transmitting a notification signal can be reduced. Moreover, since the signal processing apparatus can establish synchronization with a terminal station that has newly entered the wireless communication system via the base station, transmission of an uplink signal by the terminal station can be realized. In addition, when the method management device receives a signal of a wireless method that is not set in the signal processing device from the signal processing device, in addition to being able to instruct the signal processing device to set the wireless method, When the frequency of communication performed using the wireless method for which the signal processing device is set falls below the threshold, the wireless method can be canceled, so that a plurality of wireless methods can be flexibly handled.

It is a block diagram which shows the structure of the flexible wireless system in 1st Embodiment of this invention. FIG. 2 is a block diagram illustrating configurations of a signal processing device 2, a flexible wireless base station 3, and a wireless terminal station 4 in the first embodiment. It is a figure explaining operation | movement of the whole flexible wireless system in this 1st Embodiment. 4 is a flowchart illustrating operations of the signal processing device 2, the flexible radio base station 3, and the radio terminal station 4 in the first embodiment. 4 is a flowchart illustrating operations of the signal processing device 2, the flexible radio base station 3, and the radio terminal station 4 in the first embodiment. It is a block diagram which shows the structure of the flexible wireless system in 2nd Embodiment of this invention. It is a block diagram which shows the structure of the system management apparatus 5, the signal processing apparatus 6, the flexible radio base station 7, and the radio | wireless terminal station 8 in this 2nd Embodiment. It is a figure explaining operation | movement of the whole flexible wireless system in this 2nd Embodiment. It is a flowchart explaining operation | movement of each of the system management apparatus 5, the signal processing apparatus 6, the flexible radio base station 7, and the radio | wireless terminal station 8 in this 2nd Embodiment. It is a flowchart explaining operation | movement of each of the system management apparatus 5, the signal processing apparatus 6, the flexible radio base station 7, and the radio | wireless terminal station 8 in this 2nd Embodiment. It is a flowchart explaining operation | movement of each of the system management apparatus 5, the signal processing apparatus 6, the flexible radio base station 7, and the radio | wireless terminal station 8 in this 2nd Embodiment. It is a flowchart explaining operation | movement of each of the system management apparatus 5, the signal processing apparatus 6, the flexible radio base station 7, and the radio | wireless terminal station 8 in this 2nd Embodiment.

  The present invention is a radio communication system and a radio system setting method for reducing the load on a base station in a flexible wireless system. In the flexible wireless system, each flexible wireless base station loads software to support various wireless systems, and can handle a plurality of wireless systems simultaneously. Here, when dealing with a plurality of radio systems, supporting a radio system other than a terminal existing in the service area of the flexible radio base station has a problem of increasing the load on the flexible radio base station. On the other hand, when the flexible wireless base station supports only a limited wireless system, when the wireless terminal station of the other wireless system enters the service area, the wireless terminal station activates the flexible wireless base station. There is a problem that it cannot be detected.

  In the present invention, a signal processing device connected to a flexible radio base station periodically transmits a radio system notification signal (beacon signal) not supported by the flexible radio base station. When a response from the wireless terminal station is received for the notification signal (beacon signal), software for installing the wireless method is distributed to the corresponding flexible wireless base station.

  By adopting such a configuration, the flexible radio base station only needs to support a radio system used with a terminal that is actually communicating, and other radio system radio terminal stations are supported. When entering the service area, this can be detected through a response by a notification signal (beacon signal), and the radio system supported by the flexible radio base station can be updated.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

A. First Embodiment A first embodiment of the present invention will be described.
FIG. 1 is a block diagram showing the configuration of the flexible wireless system in the first embodiment of the present invention. In FIG. 1, the flexible wireless system includes one signal processing device 2 connected to a wired network 1 and a plurality of flexible wireless base stations 3-1 to 3-3 connected to the wired network via the signal processing device 2. N (hereinafter collectively referred to as flexible wireless base station 3) and a plurality of wireless terminal stations 4a-1 to 4a-N, 4b-1 to 4b-N (hereinafter collectively referred to as flexible wireless base stations 3) connected to the flexible wireless base station 3 Wireless terminal station 4).

  In the first embodiment, the signal processing device 2 creates a downlink broadcast signal corresponding to each radio system, and the created broadcast signal is infrequently transmitted to the flexible radio base station 3 under control where the radio system is not installed. Multicast transmission. Each time the flexible radio base station 3 receives a notification signal from the signal processing device 2, the flexible radio base station 3 broadcasts the notification signal to the subordinate radio terminal station 4 and transmits a notification signal corresponding to the installed wireless method. The created notification signal is periodically broadcasted to the subordinate radio terminal station 4. In addition, the said low frequency means that it is a time interval longer than the frequency (periodic) which transmits the alerting | reporting signal corresponding to the installed radio | wireless system, and signal processing apparatus 2 and a flexible radio base What is necessary is just to determine suitably according to the specification, the number, etc. of the station 3 and the radio | wireless terminal station 4. FIG.

  FIG. 2 is a block diagram showing the configuration of the signal processing device 2, the flexible radio base station 3, and the radio terminal station 4 in the first embodiment. In FIG. 2, the signal processing device 2 includes a central processing unit and a storage device, and includes a radio system management unit 20, a broadcast signal creation unit 21, a downlink communication unit 22, an uplink communication unit 23, and a radio system detection unit 24. , A wireless installation signal creation unit 25 and a control unit 26 are provided.

  The radio system management unit 20 manages the radio system installed in each flexible radio base station 3 under the signal processing device 2. The broadcast signal creation unit 21 creates a downlink broadcast signal corresponding to each wireless method. Note that the frequency of creating the downlink notification signal is determined based on the radio system installed in the flexible radio base station 3 under the signal processing apparatus 2 notified from the radio system management unit 20.

  Specifically, a downlink notification signal corresponding to a wireless method that is not installed in the flexible wireless base station 3 is generated at a low frequency. The low frequency is created because the wireless method that is not installed in the flexible wireless base station 3 at that time, that is, the wireless terminal station 4 of the wireless method does not exist around the flexible wireless base station 3, This is because it is not efficient in terms of load to transmit the notification signal of the wireless method in the same manner as the wireless method installed in the flexible wireless base station 3.

  The downlink communication unit 22 transmits a downlink signal to the flexible radio base station 3, and transmits the downlink notification signal created by the notification signal creation unit 21 and the radio scheme installation signal created by the radio scheme installation signal creation unit 25 to the flexible radio. Transmit to the base station 3.

  The uplink communication unit 23 receives an uplink signal from the flexible radio base station 3. The wireless method detection unit 24 detects a wireless method corresponding to the signal received from the flexible wireless base station 3. The wireless system installation signal creation unit 25 creates a signal for installing a wireless system. The wireless method installation signal is generated when the wireless method is not installed in the flexible wireless base station 3 when a wireless method corresponding to the signal received from the flexible wireless base station 3 is detected.

  The control unit 26 controls the radio system that the radio system management unit 20 in the signal processing device 2 should manage. Specifically, when the flexible wireless base station 3 installs the wireless method, the flexible wireless base station 3 is notified that the flexible wireless base station 3 has installed the wireless method, and the flexible wireless base station 3 installs the wireless method. When the base station 3 uninstalls the radio system, the base station 3 notifies the radio system manager 20 that the flexible radio base station 3 has uninstalled the radio system (not installed).

  The flexible radio base station 3 includes a central processing unit and a storage device, and includes a broadcast signal creation unit 30, a downlink communication unit 31, a radio system usage frequency management unit 32, a radio system uninstall unit 33, and a radio system uninstallation complete. A signal creation unit 34, an uplink communication unit 35, and a synchronization establishment unit 36 are provided.

  The broadcast signal creation unit 30 periodically creates a downlink broadcast signal corresponding to the radio system installed in the flexible radio base station 3. The downlink communication unit 31 receives the downlink signal from the signal processing device 2, transmits the downlink signal to the wireless terminal station 4, and creates the notification signal received from the signal processing device 2 and the notification signal creation unit 30. A notification signal is transmitted to the wireless terminal station 4. The radio system usage frequency management unit 32 manages the frequency of communication performed using the radio system installed in the flexible radio base station 3.

  When the frequency of communication performed using the wireless method installed in the flexible wireless base station 3 falls below the threshold, the wireless method uninstaller 33 uninstalls the wireless method. Note that a value predetermined for each embodiment is used as this threshold value, and this value is stored in a predetermined memory area in the wireless method uninstaller 33. When the wireless method uninstallation is completed, the wireless method uninstallation completion signal creation unit 34 creates a wireless method uninstallation completion signal that notifies the completion of the wireless method uninstallation.

  The uplink communication unit 35 receives the uplink signal from the wireless terminal station 4, transmits the uplink signal to the signal processing device 2, and receives the wireless method uninstallation completion signal created by the wireless method uninstallation completion signal creation unit 34. It transmits to the signal processing device 2. When the synchronization establishment unit 36 receives a synchronization establishment request signal from the wireless terminal station 4, the synchronization establishment unit 36 establishes synchronization with the wireless terminal station 4.

  The wireless terminal station 4 includes a central processing unit and a storage device, and includes a downlink communication unit 40, a synchronization establishment request signal creation unit 41, and an uplink communication unit 42. The downlink communication unit 40 receives a downlink signal from the flexible radio base station 3. The synchronization establishment request signal creation unit 41 creates a signal for requesting establishment of synchronization with the flexible wireless base station 3. The synchronization establishment request signal is received when the wireless terminal station 4 that has not established synchronization with the flexible wireless base station 3 receives a notification signal corresponding to the wireless system handled by the wireless terminal station 4 from the flexible wireless base station 3. Created on. The uplink communication unit 42 transmits the uplink signal to the flexible radio base station 3 and transmits the synchronization establishment request signal created by the synchronization establishment request signal creation unit 41 to the flexible radio base station 3.

Next, the operation of the first embodiment will be described.
FIG. 3 is a diagram for explaining the operation of the entire flexible wireless system in the first embodiment. In FIG. 3, it is assumed that the signal processing apparatus 2 manages two types of wireless systems, 802.11 and 802.15.4.

  The signal processing device 2 transmits the notification signal corresponding to 802.15.4 to the flexible radio base station 3a at a low frequency, and transmits the notification signal corresponding to 802.11 to the flexible radio base station 3c. Send infrequently.

  The flexible radio base station 3a periodically transmits a broadcast signal corresponding to 802.11 to the radio terminal stations 4a-1 to 4a-N, and a broadcast signal corresponding to 802.15.4 from the signal processing device 2. The notification signal is transmitted every time a signal is received. The flexible radio base station 3b periodically transmits a notification signal corresponding to 802.11 to the wireless terminal stations 4b-1 to 4b-N, and periodically transmits a notification signal corresponding to 802.15.4. Send. Furthermore, the flexible wireless base station 3c transmits the notification signal to the wireless terminal stations 4c-1 to 4c-N every time a notification signal corresponding to 802.11 is received from the signal processing device 2, and 802. A notification signal corresponding to 15.4 is periodically transmitted.

  4 and 5 are flowcharts for explaining the operations of the signal processing apparatus 2, the flexible radio base station 3, and the radio terminal station 4 in the first embodiment. First, in the signal processing device 2, the wireless method management unit 20 notifies the notification signal creation unit 21 of the wireless method installed in each flexible wireless base station 3 under the signal processing device 2. The notification signal creation unit 21 downloads the downlink corresponding to each radio system based on the information indicating the radio system installed in each flexible radio base station 3 under the signal processing apparatus 2 notified from the radio system management unit 20. Create a notification signal. That is, a notification signal corresponding to a wireless method that is not installed in the flexible wireless base station 3 is generated at a low frequency. The downlink communication unit 22 multicast-transmits the broadcast signal created by the broadcast signal creation unit 21 to the flexible radio base station 3 under the signal processing device 2 that does not have the radio system corresponding to the broadcast signal installed (step). Sc1).

  In the flexible radio base station 3, the broadcast signal creation unit 30 periodically creates a downlink broadcast signal corresponding to the radio system installed in the flexible radio base station 3, and the downlink communication unit 31 is a signal processing device. The broadcast signal received from 2 and the broadcast signal created by the broadcast signal creation unit 30 are broadcasted to the wireless terminal stations 4 under the flexible wireless base station 3 (steps Sc2, Sc3, Sc4).

  In the wireless terminal station 4, the downlink communication unit 40 receives the broadcast signal transmitted from the flexible wireless base station 3 (step Sc5), notifies the received broadcast signal to the synchronization establishment request signal creation unit 41, and establishes synchronization. The request signal creation unit 41 handles a radio system corresponding to the broadcast signal notified from the downlink communication unit 40 by the radio terminal station 4 (YES in step Sc6), and the radio terminal station 4 performs flexible radio communication. When synchronization with the base station 3 is not established (NO in step Sc7), a synchronization request establishment signal is created, and the uplink communication unit 42 flexibly uses the synchronization request establishment signal created by the synchronization establishment request signal creation unit 41. The radio base station 3 is notified (step Sc8). On the other hand, when the wireless terminal station 4 does not handle the wireless method corresponding to the notification signal notified from the downlink communication unit 40 (NO in step Sc6), or the wireless terminal station 4 is connected to the flexible wireless base station 3 Is established (YES in step Sc7), nothing is done and the process returns to step Sc1 or Sc2.

  In the flexible wireless base station 3, the uplink communication unit 35 receives the synchronization establishment request signal transmitted from the wireless terminal station 4 (step Sc9), and the wireless method corresponding to the received synchronization establishment request signal has been installed. In this case (YES in step Sc10), the synchronization establishing unit 36 establishes synchronization with the wireless terminal station 4 that has transmitted the synchronization establishment request signal received in step Sc9 (step Sc17). On the other hand, when the wireless method corresponding to the received synchronization establishment request signal has not been installed (NO in Step Sc10), the uplink communication unit 35 transmits the received synchronization establishment request signal to the signal processing device 2 (Step S10). Sc11).

  In the signal processing device 2, the uplink communication unit 23 receives the synchronization establishment request signal transmitted from the flexible radio base station 3 (step Sc12), and the radio scheme detection unit 24 responds to the received synchronization establishment request signal. The wireless method is detected (step Sc13), the wireless method installation signal creation unit 25 creates an installation signal instructing to install the wireless method for the received synchronization establishment request signal, and the control unit 26 performs the installation. The radio system management unit 20 is notified that the radio system corresponding to the signal is to be installed, and the downlink communication unit 22 transmits the created install signal to the flexible radio base station 3 (step Sc14). The radio system management unit 20 manages that the radio system is installed in the flexible radio base station 3.

  In the flexible wireless base station 3, the downlink communication unit 31 receives a wireless method installation signal from the signal processing device 2 (step Sc15), and installs a wireless method corresponding to the received wireless method installation signal (step Sc16). . Before installing the wireless system, the signal processing device 2 transmits the notification signal corresponding to the wireless system at a low frequency. However, by installing the wireless system, the notification signal is transmitted to the flexible wireless base station 3. Will send periodically. Next, the synchronization establishment unit 36 establishes synchronization with the wireless terminal station 4 that has transmitted the synchronization establishment request signal received in step Sc9 (step Sc17).

  Although not shown in FIG. 3 or FIG. 4 and FIG. 5, the flexible wireless base station 3 may perform the wireless communication when the frequency of communication performed using the installed wireless method falls below a threshold value. The method can be uninstalled.

  That is, in the flexible radio base station 3, the radio system usage frequency management unit 32 notifies the radio system uninstaller 33 of the frequency of communication performed using the radio system installed in the flexible radio base station 3. . The wireless method uninstaller 33 is based on information indicating the frequency of communication performed using the wireless method installed in the flexible wireless base station 3 notified from the wireless method use frequency management unit 32. Uninstall the method. That is, when the frequency falls below the threshold, the radio system is uninstalled. Also, the wireless method uninstallation completion signal creation unit 34 is notified that the wireless method uninstallation has been completed.

  When the wireless method uninstall completion signal generator 34 is notified by the wireless method uninstaller 33 that the wireless method has been uninstalled, the wireless method uninstall completion signal generator 34 generates a signal indicating that the wireless method has been uninstalled. The uplink communication unit 35 notifies the signal processing device 2 of the radio system uninstallation completion signal created by the radio system uninstallation completion signal creation unit 34.

  Further, in the signal processing device 2, the uplink communication unit 23 receives a radio system uninstallation completion signal from the flexible radio base station 3 under the signal processing device 2. When the control unit 26 receives the wireless method uninstallation completion signal from the flexible wireless base station 3, the control unit 26 uninstalls the wireless method corresponding to the wireless method uninstallation completion signal to the wireless method management unit 20. Notify you. The radio system management unit 20 manages that the radio system installed in the flexible radio base station 3 has been uninstalled.

  In the first embodiment described above, the flexible wireless base station 3 transmits the broadcast signal received from the signal processing device 2 to the wireless terminal station 4 without demodulating it, thereby signal processing device 2 -wireless terminal station 4. It is possible to reduce the amount of signal processing necessary for communication between the two.

  In the first embodiment described above, the signal processing device 2 may notify the flexible radio base station 3 of the transmission interval of the notification signal together with the notification signal. As a result, the subsequent transmission of the notification signal can be performed by the flexible radio base station 3, and the load of the signal processing device 2 transmitting the notification signal can be reduced.

  Moreover, in 1st Embodiment mentioned above, it can apply widely to the radio | wireless system which a flexible wireless system accommodates. Therefore, the present invention is not limited to a specific wireless system (for example, 802.11 or 802.15.4) as a usage pattern.

B. Second Embodiment Next, a second embodiment of the present invention will be described.
FIG. 6 is a block diagram showing the configuration of the flexible wireless system in the second embodiment of the present invention. It should be noted that portions corresponding to those in FIG. In FIG. 6, the flexible wireless system includes one method management device 5 connected to the wired network 1 and signal processing devices 6-1 to 6-N (hereinafter referred to as “connected” to the method management device 5 via a wired line). And a plurality of flexible wireless base stations 7a-1 to 7a-N, 7b-1 connected to the wired network via the signal processing devices 6-1 to 6-N. 7b-N (hereinafter collectively referred to as a flexible wireless base station 7) and a plurality of wireless terminal stations 8a-1 to 8a-N, 8b-1 to 8b connected to the flexible wireless base station 7 via wireless lines -N, 8c-1 to 8c-N, 8d-1 to 8d-N (hereinafter collectively referred to as wireless terminal station 8).

  The method management device 5 creates a downlink notification signal corresponding to each wireless method, and multicasts the generated notification signal to the subordinate signal processing devices 6-1 to 6-N in which the wireless method is not installed. It is supposed to send. In other words, in the second embodiment, the method management device 5 creates a downlink notification signal corresponding to each wireless method, and the subordinate signal processing device 6-1 in which the wireless method is not installed is created for the generated notification signal. Multicast transmission at low frequency to ˜6-N. Each time the signal processing devices 6-1 to 6 -N receive the notification signal from the method management device 5, the flexible radio base stations 7 a-1 to 7 a -N, 7 b-1 to 7 b -N subordinate to the notification signal. In addition to transmitting to the mobile station, a notification signal corresponding to the installed wireless method is created, and the created notification signal is periodically transmitted to the subordinate flexible radio base stations 7a-1 to 7a-N and 7b-1 to 7b-N. Will be sent. Note that the low frequency means a longer time interval than the frequency (periodic) of transmitting a notification signal corresponding to the installed wireless method, and the method management device 5 or the signal processing device. 6. It may be determined as appropriate according to the specifications and the number of flexible wireless base stations 7 and wireless terminal stations 8.

  FIG. 7 is a block diagram showing configurations of the method management device 5, the signal processing device 6, the flexible wireless base station 7, and the wireless terminal station 8 in the second embodiment. Here, descriptions of the same functions as those in the first embodiment are omitted, and differences will be described below. In FIG. 7, the method management device 5 is composed of a central processing unit and a storage device, and is included in the signal processing device 2 in the first embodiment, the wireless method management unit 20, the notification signal creation unit 21, and downlink communication. Unit 22, uplink communication unit 23, radio system detection unit 24, radio system installation signal creation unit 25, control unit 26, radio system management unit 50, broadcast signal creation unit 51, downlink communication unit 52, uplink A communication unit 53, a wireless system detection unit 54, a wireless system installation signal creation unit 55, and a control unit 56 are provided.

  The radio system management unit 50 manages the radio system installed in each signal processing device 6 under the system management device 5. The broadcast signal creation unit 51 creates a downlink broadcast signal corresponding to each wireless method. The frequency of creating the downlink notification signal is determined based on the radio system installed in the signal processing apparatus 6 under the system management apparatus 5 notified from the radio system management unit 50. Specifically, a downlink notification signal corresponding to a wireless method that is not installed in the signal processing device 6 is generated at a low frequency.

  The downlink communication unit 52 transmits the downlink signal to the signal processing device 6, and also transmits the downlink notification signal created by the notification signal creation unit 51 and the wireless method installation signal created by the wireless method installation signal creation unit 55. 6 to send. The uplink communication unit 53 receives an uplink signal from the signal processing device 6. The wireless method detection unit 54 detects a wireless method corresponding to the signal received from the signal processing device 6.

  The wireless system installation signal creation unit 55 creates a signal for installing a wireless system. The wireless method installation signal is generated when the wireless method is not installed in the signal processing device 6 when a wireless method corresponding to the signal received from the signal processing device 6 is detected.

  The control unit 56 controls the radio system that the radio system management unit 50 in the system management apparatus 5 should manage. Specifically, when the signal processing device 6 is to install a wireless method, the signal processing device 6 is notified to the wireless method management unit 50 that the signal processing device 6 has installed the wireless method. When the wireless method is uninstalled, the signal processing device 6 notifies the wireless method management unit 50 that the wireless method has been uninstalled (not installed).

  The signal processing device 6 has the same configuration as that of the flexible radio base station 3 in the first embodiment. That is, the signal processing device 6 includes the broadcast signal creation unit 30, the downlink communication unit 31, the radio system usage frequency management unit 32, the radio system uninstall unit 33, and the radio system uninstallation completion that the flexible radio base station 3 includes. Equivalent to the signal preparation part 34, the uplink communication part 35, and the synchronization establishment part 36, the alerting signal preparation part 60, the downlink communication part 61, the radio | wireless system usage frequency management part 62, the radio | wireless system uninstallation part 63, a radio | wireless system uninstallation A completion signal creation unit 64, an uplink communication unit 65, and a synchronization establishment unit 66 are provided. The notification signal creation unit 60 periodically creates a downlink notification signal corresponding to the radio system installed in the signal processing device 6. The downlink communication unit 61 receives the downlink signal from the scheme management device 5 and transmits the downlink signal to the flexible radio base station 7, and the broadcast signal received from the scheme management device 5 and the broadcast signal creation unit 60 create the downlink signal. The broadcast signal is transmitted to the flexible radio base station 7.

  The radio system usage frequency management unit 62 manages the frequency of communication performed using the radio system installed in the signal processing device 6. When the frequency of communication performed using the wireless method installed in the signal processing device 6 falls below the threshold, the wireless method uninstaller 63 uninstalls the wireless method. Note that a value predetermined for each embodiment is used for this threshold, and this value is stored in a predetermined memory area in the wireless system uninstaller 63.

  The wireless method uninstallation completion signal creation unit 64 creates a wireless method uninstallation completion signal for notifying that the wireless method has been uninstalled when the wireless method has been uninstalled. The uplink communication unit 65 receives the uplink signal from the flexible radio base station 7, transmits the uplink signal to the method management apparatus 5, and transmits the radio method uninstall completion signal generated by the radio method uninstall completion signal creation unit 64. Is transmitted to the method management apparatus 5.

  When the synchronization establishing unit 66 receives a synchronization establishment request signal from the wireless terminal station 8 via the flexible wireless base station 7, the synchronization establishing unit 66 establishes synchronization with the wireless terminal station 8 via the flexible wireless base station 7.

  The flexible radio base station 7 includes a downlink communication unit 70 and an uplink communication unit 71. The downlink communication unit 70 receives a downlink signal from the signal processing device 6 and transmits the downlink signal to the wireless terminal station 8. The uplink communication unit 71 receives the uplink signal from the radio terminal station 8 and transmits the uplink signal to the signal processing device 6.

  The wireless terminal station 8 has the same configuration as the wireless terminal station 4 in the first embodiment. That is, the wireless terminal station 8 corresponds to the downlink communication unit 40, the synchronization establishment request signal creation unit 41, and the uplink communication unit 42 included in the wireless terminal station 4, and the downlink communication unit 80, the synchronization establishment request signal. A creation unit 81 and an uplink communication unit 82 are provided. The downlink communication unit 80, the synchronization establishment request signal creation unit 81, and the uplink communication unit 82 have the same functions as the downlink communication unit 40, the synchronization establishment request signal creation unit 41, and the uplink communication unit 42, respectively, and thus description thereof is omitted. To do.

Next, the operation of the second embodiment will be described.
FIG. 8 is a diagram for explaining the operation of the entire flexible wireless system in the second embodiment. In FIG. 8, it is assumed that the method management apparatus 5 manages two types of wireless methods, 802.11 and 802.15.4.

  The system management device 5 transmits an informing signal corresponding to 802.15.4 to the signal processing device 6-2 at a low frequency, and transmits 802.11 notification signals to the signal processing devices 6-3 and 6-4. A notification signal corresponding to is transmitted at a low frequency.

  The signal processing device 6-1 periodically transmits a broadcast signal corresponding to 802.11 to the flexible radio base stations 7 a-1 and 7 a-2, and 802 to the flexible radio base station 7 a-1. .15.4 is periodically transmitted, and the broadcast signal corresponding to 802.15.4 is transmitted to the flexible radio base station 7a-2 at a low frequency. The signal processing device 6-2 periodically transmits a broadcast signal corresponding to 802.11 to the flexible wireless base stations 7b-1 and 7b-2, and supports the method management device 5 to 802.15.4. Each time a notification signal is received, the notification signal is transmitted. The signal processing device 6-3 transmits the notification signal to the flexible radio base stations 7c-1 and 7c-2 every time a notification signal corresponding to 802.11 is received from the method management device 5; A notification signal corresponding to 15.4 is periodically transmitted. The signal processing device 6-4 transmits the notification signal to the flexible radio base stations 7d-1 and 7d-2 every time a notification signal corresponding to 802.11 is received from the method management device 5; A notification signal corresponding to 15.4 is periodically transmitted.

  FIG. 9 to FIG. 12 are flowcharts for explaining the operations of the system management device 5, the signal processing device 6, the flexible radio base station 7, and the radio terminal station 8 in the second embodiment. First, in the method management device 5, the wireless method management unit 50 notifies the notification signal creation unit 51 of the wireless method installed in each signal processing device 6 under the method management device 5. Based on the information indicating the radio system installed in each signal processing device 6 under the system management device 5 notified from the radio system management unit 50, the broadcast signal creation unit 51 is provided for downlink notification corresponding to each radio system. Create a signal. That is, a notification signal corresponding to a wireless method that is not installed in the signal processing device 6 is generated at a low frequency. The downlink communication unit 52 multicast-transmits the broadcast signal created by the broadcast signal creation unit 51 to the signal processing device 6 under the scheme management device 5 that does not install the radio scheme corresponding to the broadcast signal (step Sf1). .

  In the signal processing device 6, the notification signal creation unit 60 periodically creates a downlink notification signal corresponding to the radio system installed in the signal processing device 6, and the downlink communication unit 61 receives the information from the method management device 5. The received notification signal and the notification signal created by the notification signal creation unit 60 are transmitted to the flexible radio base station 7 under the signal processing device 6 (steps Sf2, Sf3, Sf4).

  In the flexible radio base station 7, the downlink communication unit 70 receives the notification signal transmitted from the signal processing device 6 (step Sf5), and broadcasts the received notification signal to the radio terminal stations 8 under the flexible radio base station 7. Transmit (step Sf6).

  In the radio terminal station 8, the downlink communication unit 80 receives the broadcast signal transmitted from the flexible radio base station 7 (step Sf7), notifies the received broadcast signal to the synchronization establishment request signal creation unit 81, and establishes synchronization. The request signal creation unit 81 handles a radio system corresponding to the received notification signal (YES in step Sf8), and the radio terminal station 8 synchronizes with the signal processing device 6 via the flexible radio base station 7. Is not established (NO in step Sf9), a synchronization request establishment signal is created, and the uplink communication unit 82 notifies the flexible radio base station 7 of the synchronization request establishment signal created by the synchronization establishment request signal creation unit 81. (Step Sf10). On the other hand, when the wireless terminal station 8 does not handle a wireless system corresponding to the notification signal notified from the downlink communication unit 80 (NO in step Sf8), or the wireless terminal station 8 uses the flexible wireless base station 7 If the synchronization with the signal processing device 6 is established via (Yes in Step Sf9), the process returns to Step Sf1 or Sf2 without doing anything.

  In the flexible wireless base station 7, the uplink communication unit 71 receives the synchronization establishment request signal transmitted from the wireless terminal station 8 (step Sf11), and transmits the received synchronization establishment request signal to the signal processing device 6 (step Sf11). Sf12).

  In the signal processing device 6, the uplink communication unit 65 receives the synchronization establishment request signal transmitted from the flexible wireless base station 7 (step Sf13), and the wireless method corresponding to the received synchronization establishment request signal has been installed. In this case (YES in step Sf14), the synchronization establishing unit 66 establishes synchronization with the wireless terminal station 8 via the flexible wireless base station 7 that has transmitted the synchronization establishment request signal received in step Sf13 (step Sf21). .

  On the other hand, if the wireless method corresponding to the received synchronization establishment request signal has not been installed (NO in step Sf14), the uplink communication unit 65 transmits the received synchronization establishment request signal to the method management device 5 (step Sf14). Sf15).

  In the method management device 5, the uplink communication unit 53 receives the synchronization establishment request signal transmitted from the signal processing device 6 (step Sf16), and the wireless method detection unit 54 wirelessly transmits the received synchronization establishment request signal. The method is detected (step Sf17), the wireless method installation signal creation unit 55 creates an installation signal instructing to install the wireless method for the received synchronization establishment request signal, and the control unit 56 sends the installation signal. Is notified to the radio system management unit 50, and the downlink communication unit 52 transmits the created install signal to the signal processing device 6 (step Sf18). The radio system management unit 50 manages that the radio system is installed in the signal processing device 6.

  In the signal processing device 6, the downlink communication unit 61 receives a wireless method installation signal from the method management device 5 (step Sf19), and installs a wireless method corresponding to the received wireless method installation signal (step Sf20). Before installing the wireless method, the method management device 5 transmits the notification signal corresponding to the wireless method at a low frequency. However, the signal processing device 6 transmits the notification signal by installing the wireless method. It will be sent regularly. Next, the synchronization establishment unit 66 establishes synchronization with the wireless terminal station 8 via the flexible wireless base station 7 that has transmitted the synchronization establishment request signal received at step Sf13 (step Sf21).

  Although not shown in FIG. 8 or FIG. 9 to FIG. 12, the signal processing device 6 may use the wireless system when the frequency of communication performed using the installed wireless system falls below a threshold value. Can be uninstalled.

  That is, in the signal processing device 6, the wireless method use frequency management unit 62 notifies the wireless method uninstaller 63 of the frequency of communication performed using the wireless method installed in the signal processing device 6. The wireless method uninstaller 63 is based on the information indicating the frequency of communication performed using the wireless method installed in the signal processing device 6 notified from the wireless method use frequency management unit 62. Uninstall. That is, when the frequency falls below the threshold, the radio system is uninstalled. In addition, the wireless method uninstallation completion signal creation unit 64 is notified that the wireless method uninstallation has been completed.

  When notified from the wireless method uninstaller 63 that the wireless method has been uninstalled, the wireless method uninstall completion signal creation unit 64 creates a signal indicating that the wireless method has been uninstalled. The uplink communication unit 65 notifies the method management apparatus 5 of the wireless method uninstallation completion signal created by the wireless method uninstallation completion signal creation unit 64.

  In the method management device 5, the uplink communication unit 53 receives a wireless method uninstallation completion signal from the signal processing device 6 under the method management device 5. When the control unit 56 receives the wireless method uninstallation completion signal from the signal processing device 6, the control unit 56 uninstalls the wireless method corresponding to the wireless method uninstallation completion signal to the wireless method management unit 50. To be notified. The radio system management unit 50 manages that the radio system installed in the signal processing device 6 has been uninstalled.

  In the second embodiment described above, the signal processing device 6 transmits the broadcast signal received from the method management device 5 to the flexible radio base station 7 without demodulating, thereby transmitting the method management device 5 to the radio terminal station 8. It is possible to reduce the amount of signal processing necessary for communication between the two.

  In the second embodiment described above, the flexible radio base station 7 transmits the broadcast signal received from the signal processing device 6 to the radio terminal station 8 without demodulating it, thereby managing the system management device 5 -the radio terminal station 8. It is possible to reduce the amount of signal processing necessary for communication between the two.

  In the second embodiment described above, the method management device 5 may notify the signal processing device 6 of the transmission interval of the notification signal together with the notification signal. As a result, the subsequent notification signal transmission can be performed by the signal processing device 6, and the load of the method management device 5 transmitting the notification signal can be reduced.

  Moreover, in 2nd Embodiment mentioned above, it can apply widely to the radio | wireless system which a flexible wireless system accommodates. Therefore, the present invention is not limited to a specific wireless system (for example, 802.11 or 802.15.4) as a usage pattern.

DESCRIPTION OF SYMBOLS 1 Wired network 2, 6, 6-1 to 6-N Signal processing device 3, 3-1 to 3-N, 7, 7a-1 to 7a-N, 7b-1 to 7b-N, 7c-1 to 7c -2, 7d-1 to 7d-2 Flexible radio base stations 4, 4a-1 to 4a-N, 4b-1 to 4b-N, 4c-1 to 4c-N, 8, 8a-1 to 8a-N, 8b-1 to 8b-N, 8c-1 to 8c-N, 8d-1 to 8d-N, 8e-1 to 8e-N, 8f-1 to 8f-N, 8g-1 to 8g-N, 8h- 1 to 8h-N wireless terminal station 5 system management device 20, 50 wireless system management unit 21, 51 broadcast signal creation unit 22, 52 downlink communication unit 23, 53 uplink communication unit 24, 54 wireless system detection unit 25, 55 Wireless system installation signal creation unit 26, 56 Control unit 30, 60 Notification signal creation unit 31, 61 Downlink Communication unit 32, 62 Radio system usage frequency management unit 33, 63 Radio system uninstall unit 34, 64 Radio system uninstall completion signal creation unit 35, 65 Uplink communication unit 36, 66 Synchronization establishment unit 40, 80 Downlink communication unit 41, 81 Synchronization establishment request signal creation unit 42, 82 Uplink communication unit 70 Downlink communication unit 71 Uplink communication unit

Claims (8)

It is composed of a signal processing device that manages a plurality of radio systems and broadcasts a notification signal indicating the radio system, and a base station and a terminal station that perform data transmission / reception using one of the plurality of radio systems. A wireless communication system,
The base station
A wireless method setting means for setting any one of the plurality of wireless methods as a wireless method used for data transmission / reception with the terminal station;
Transmission / reception means for transmitting / receiving data to / from a terminal station using the same wireless method as the wireless method set by the wireless method setting means,
The signal processing device includes:
Informing means for informing the terminal station via the base station of an informing signal indicating a radio system not set in the base station;
When a synchronization request based on a wireless method not set in the base station is received from the terminal station via the base station, a wireless method corresponding to the synchronization request from the terminal station is transmitted to the base station. An instruction means for instructing setting, and
The base station
The wireless method setting means sets a wireless method corresponding to the synchronization request from the terminal station as a wireless method used for data transmission / reception with the terminal station according to an instruction from the instruction means of the signal processing device. A wireless communication system. The notification means is a predetermined time for notifying the terminal station of a notification signal indicating a radio system not set in the base station and a notification signal indicating a radio system set by the radio system setting means by the base station. The wireless communication system according to claim 1, wherein the terminal station is notified via the base station at a lower frequency than the interval.   The base station further includes a wireless method canceling unit that cancels the setting of the wireless method when the frequency of communication performed using the wireless method set by the wireless method setting unit falls below a predetermined threshold. The wireless communication system according to claim 1, wherein the wireless communication system is a wireless communication system. Management of a plurality of radio systems and a system management apparatus that reports a broadcast signal indicating a radio system, a signal processing apparatus, a base station, and a plurality of radio systems using the same radio system, A wireless communication system configured with a terminal station that transmits and receives data to and from the signal processing device,
The signal processing device includes:
A wireless method setting means for setting any one of the plurality of wireless methods as a wireless method used for data transmission / reception with the terminal station;
Transmission / reception means for transmitting / receiving data to / from a terminal station using the same radio scheme as the radio scheme set by the radio scheme setting means via the base station,
The method management device includes:
Informing means for informing the terminal station via the signal processing device and the base station of an informing signal indicating a radio system not set in the signal processing device;
When a synchronization request by a wireless method not set in the signal processing device is received from the terminal station via the base station and the signal processing device, the synchronization from the terminal station to the signal processing device An instruction means for instructing setting of a wireless method corresponding to the request,
The signal processing device includes:
The wireless method setting means sets a wireless method corresponding to the synchronization request from the terminal station as a wireless method used for data transmission / reception with the terminal station according to an instruction from the instruction means of the method management apparatus. A wireless communication system. The notification means notifies the terminal station of a notification signal indicating a radio system not set in the signal processing apparatus, and a notification signal indicating a radio system set by the radio system setting means by the signal processing apparatus. 5. The wireless communication system according to claim 4, wherein the terminal station is notified via the signal processing device and the base station at a lower frequency than the time interval.   The signal processing device further includes a wireless method release unit for releasing the setting of the wireless method when the frequency of communication performed using the wireless method set by the wireless method setting unit falls below a predetermined threshold. The wireless communication system according to claim 4 or 5, further comprising: A radio system setting method for a radio communication system including a signal processing device and a base station and a terminal station that transmit and receive data using the same radio system of any of a plurality of radio systems,
A notification step in which the signal processing device notifies the terminal station of a notification signal indicating a wireless method not set in the base station;
When the signal processing apparatus receives a synchronization request by a wireless method not set in the base station from the terminal station via the base station, the synchronization request from the terminal station is sent to the base station. An instruction step for instructing setting of a wireless method corresponding to
A radio in which the base station sets a radio system corresponding to the synchronization request from the terminal station as a radio system used for data transmission / reception with the terminal station in accordance with an instruction from the signal processing device in the instruction step A method setting step;
The base station includes: a transmission / reception step for transmitting / receiving data to / from a terminal station that uses the same radio scheme as the radio scheme set for the base station in the radio scheme setting step. Method setting method. A terminal that transmits and receives data to and from the signal processing device via the base station using a method management device, a signal processing device, a base station, and any one of a plurality of wireless methods. A wireless system setting method of a wireless communication system configured with a station,
A notification step of notifying the terminal station via the signal processing device and the base station of a notification signal indicating a wireless method not set in the signal processing device, the method management device;
When the method management device receives a synchronization request by a wireless method not set in the signal processing device from the terminal station via the base station and the signal processing device, the signal processing device, An instruction step for instructing setting of a wireless method corresponding to the synchronization request from the terminal station;
The signal processing device sets a wireless method corresponding to the synchronization request from the terminal station as a wireless method used for data transmission / reception with the terminal station according to an instruction from the method management device in the instruction step. A wireless method setting step;
A transmission / reception step in which the signal processing device transmits / receives data to / from a terminal station using the same wireless method as the wireless method set in the signal processing device in the wireless method setting step through the base station. A wireless system setting method comprising: and.

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