JP2007295133A - Communication system and communication control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system and a communication control method capable of setting stepwise communication limit to be placed on wireless communication apparatuses connected via repeaters. <P>SOLUTION: A management server S for storing identification information of wireless communication apparatuses 1A to 1F under the control of repeaters 2A to 2D stores a first blacklist for inhibiting communication across repeaters 2A to 2D. A wireless communication apparatus 1A whose identification code is written in the first blacklist is banned from making communication with other wireless communication terminals 1C to 1F across the plural repeaters 2A to 2D. The repeaters 2A to 2D store a second blacklist for inhibiting return communication. The wireless communication apparatus 1F whose identification code is written in the first black list and the second black list of the repeater 2D is also banned for making return communication in the repeater 2D. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication system and a communication control method.

  There is a system that allows wireless terminals to communicate with each other via a repeater that is a repeater. In the case of a specific low-power communication system, the range (several hundred meters to several kilometers) that can be covered by a single repeater is narrow, so even if a malicious terminal is stolen by a malicious person, the jamming wave via the repeater The reach is narrow and the damage is relatively small.

  However, when a plurality of repeaters are connected by wire and the range covered by the plurality of repeaters increases, the number of wireless terminals under the control of the plurality of repeaters also increases and the damage increases. Therefore, technology that disables communication of wireless terminals registered in the blacklist by registering wireless terminals that may generate jamming and functions of wireless terminals that may generate jamming A method of stopping is conceivable.

Patent Document 1 below discloses a communication system using a black list. Patent Document 2 discloses a method for stopping the function of a wireless terminal.
Japanese Patent Application Laid-Open No. 07-23460 Japanese Patent Laid-Open No. 10-23540

  In the communication system of Patent Document 1, when the device number of an unauthorized non-subscriber terminal is registered as a visitor blacklist in each exchange, and when the exchange receives a call request from the terminal, it first searches in the visitor blacklist If the number corresponding to the terminal exists in the visitor blacklist, the connection is disconnected. If the number that matches the terminal that sent the call request is not in the visitor's black list, the roaming process determines whether it is an unauthorized non-subscriber terminal from the black list at the roaming stage. If so, it is registered in the exchange's visitor blacklist.

  In the communication system of Patent Document 2, when a line use prohibition request signal is transmitted from a wireless terminal to another specific wireless terminal, the storage unit of the specific wireless terminal stores that the line use prohibition request signal has been received. Thereafter, the function of transmitting and receiving stops.

  In the technique of the above-mentioned Patent Document 1, an unauthorized non-subscriber terminal number is registered in the visitor blacklist of the exchange (relay station), and the unauthorized non-subscriber terminal is disconnected. However, even if it is an unauthorized non-participating terminal or the like, there are cases where it is desired to enable communication with other terminals accommodated in the same switching center. Communication with other subordinate terminals is not possible.

  In addition, in order to determine whether the terminal is an unauthorized non-participating terminal, it is necessary to perform a two-stage determination, that is, a determination based on a visitor's black list for a switching center and a determination based on a black list for a home station.

  In the communication system of Patent Document 2 described above, the function of a specific wireless terminal is completely stopped using a line use prohibition request signal, and therefore communication between the specific wireless terminal and all other terminals cannot be performed. Also, if the line use prohibition request signal is abused, there is a risk that the function of a normal wireless terminal will stop.

  An object of this invention is to provide the communication system and communication control method which can implement | achieve communication restrictions in steps according to the grade of a radio | wireless terminal.

In order to achieve the above object, a communication system according to the first aspect of the present invention provides:
A plurality of repeaters installed in different areas and connected to each other, each storing identification information of subordinate wireless terminals in the arranged areas, and connected to the plurality of repeaters, And a management server for grasping position information indicating which relay device the subordinate radio terminal is subordinate to, and each repeater stores communication between the subordinate radio terminals in each repeater. Relaying using the identification information, and performing communication between the subordinate radio terminal and the radio terminal subordinate to another repeater, the location information of the radio terminal subordinate to the other repeater is A communication system that receives a communication with a management server and relays based on the position information,
The management server
First storage means for storing information of a first designated wireless terminal designated in advance among wireless terminals under the plurality of repeaters;
Communication between the first designated wireless terminal and a wireless terminal under the control of another repeater that does not have the first designated wireless terminal is based on information stored in the first storage means. A first prohibition means to prohibit;
It is characterized by providing.

In addition, each said repeater is
Second storage means for storing information of a second designated wireless terminal designated in advance among subordinate wireless terminals;
Communication between the second designated wireless terminal and a wireless terminal other than the second designated wireless terminal among the plurality of wireless terminals under the plurality of repeaters is stored in the second storage means. And a second prohibition unit that prohibits based on the received information.

In order to achieve the above object, a communication control method according to a second aspect of the present invention includes:
A plurality of repeaters installed in different areas and connected to each other, each storing identification information of subordinate wireless terminals in the arranged areas, and connected to the plurality of repeaters, And a management server for grasping position information indicating which relay device the subordinate radio terminal is subordinate to, and each repeater stores communication between the subordinate radio terminals in each repeater. Relaying using the identification information, and performing communication between the subordinate radio terminal and the radio terminal subordinate to another repeater, the location information of the radio terminal subordinate to the other repeater is A communication control method for receiving via communication with a management server and relaying based on the location information,
A first storage process for storing, in the management server in advance, information on a designated first designated wireless terminal among wireless terminals under the plurality of repeaters;
Communication between the first designated wireless terminal and a wireless terminal under the control of another repeater that does not have the first designated wireless terminal is prohibited based on the information stored in the first storage process. A first prohibition process to
It is characterized by including.

In each of the repeaters, a second storage process for storing information of a second designated wireless terminal designated in advance among subordinate wireless terminals;
In each repeater, communication between the second designated wireless terminal and a wireless terminal other than the second designated wireless terminal among the plurality of wireless terminals under the plurality of repeaters is performed by the second repeater. And a second prohibition process that is prohibited based on the information stored in the storage process.

  According to the present invention, even in the first designated wireless terminal in which information is stored in the first storage means and communication with a wireless terminal under another relay is prohibited, the same relay Communication with a subordinate radio terminal can be enabled.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a configuration diagram showing a radio communication system 10 according to an embodiment of the present invention.
For example, as shown in FIG. 1, the radio communication system 10 includes repeaters 2A, 2B, 2C, and 2D that are a plurality of repeaters. The repeaters 2A and 2B are connected to the network N via the hub 3A, and the repeaters 2C and 2D are connected to the network N via the hub 3B. The wireless communication system 10 includes a plurality of wireless terminals 1A, 1B, 1C, 1D, 1E, and 1F. A management server S is connected to the network N via the hub 3A.

  The network N is, for example, a LAN (Local Area Network). The network N may be a circuit switching network, a packet switching network, the Internet, or a private line network. Further, the network N is not limited to a wired line, and may be a wireless communication network such as a wireless LAN.

  In the wireless communication system 10, communication between the wireless communication devices 1 (1A to 1F) is performed via the repeater 2 (2A, 2B, 2C, 2D). For example, the wireless communication devices 1A and 1B in FIG. 1 communicate via the repeater 2A. Further, in the wireless communication system 10, the wireless communication devices 1 belonging to different communication ranges (repeater areas) of the repeaters 2 are subordinate, and communication between the subordinate wireless communication devices 1 is performed via the network N. For example, the wireless communication devices 1A and 1D communicate via the repeater 2A, the network N, and the repeater 2C.

  Wireless communication devices (hereinafter abbreviated as slave units) 1A to 1F communicate wirelessly with repeaters 2A to 2D under their control. Communication from slave units 1A to 1F to repeaters 2A to 2D is referred to as uplink, and transmission from repeater 2 to slave unit 1 is referred to as downlink. The uplink and downlink are transmitted simultaneously on different frequencies, for example. The uplink and downlink may be transmitted twice in a time division manner.

  In one repeater 2, the number of channels that can be simultaneously communicated with the uplink and the downlink as one set is 1 or 2 or more. The number of simultaneous communication channels depends on the configuration of the repeater 2. In addition, although subunit | mobile_unit 1A-1F is described like the mobile station in FIG. 1, the case of a fixed station is included. When the number of simultaneous communication channels of the repeater 2 is one set, the communication of the slave unit 1 is half-duplex communication. If the number of simultaneous communication channels of the repeater 2 is two or more and the slave unit 1 can transmit and receive at the same time, a configuration for performing full-duplex communication is also possible.

FIG. 2 is a block diagram illustrating a configuration example of the slave unit 1.
When the handset 1 shown in FIG. 2 functions as a transmitter, the handset 1 transmits a voice signal based on a call sound of a user who uses the handset 1 or a data signal for data communication toward the receiver of the repeater 2. On the other hand, when the handset 1 functions as a receiver, the handset 1 receives an audio signal based on a call sound transmitted to the handset 1 via the repeater 2 or a data signal for data communication.

  As shown in FIG. 2, the slave unit 1 includes an antenna 11A, a transmission / reception switching unit 11, a transmission unit 12, a baseband processing unit 13, an amplification and A / D converter (hereinafter, referred to as an antenna 11A). , A / D converter) 14 and a microphone 15. The subunit | mobile_unit 1 is also provided with the receiving part 16, the baseband process part 17, the D / A conversion and amplifier (henceforth a D / A conversion part) 18, and the speaker 19 in order to implement | achieve a reception function. ing.

  The subunit | mobile_unit 1 is further provided with the controller 20 which controls each part, the time measuring part 25 which measures reception time, the display part 26 which displays communication modes etc., and the operation part 27 which inputs settings, such as a communication mode.

  The controller 20 controls the operation of the child device 1. The controller 20 includes, for example, a CPU (central processing unit) 21, an I / O (input / output device) 22, a ROM (read only memory) 24, a RAM (read / write memory) 23, and an internal bus (not shown) for connecting them. ).

  The controller 20 is connected via the I / O 22 to a timer unit 25, a display unit 26, and an operation unit 27 for measuring the switching timing of the reception mode. In order to avoid the complexity of FIG. 2 and to facilitate understanding, signal lines from the controller 20 to each unit are omitted, but the controller 20 includes a transmission / reception switching unit 11, a transmission unit 12, and baseband processing units 13 and 17. The A / D conversion unit 14, the reception unit 16, and the D / A conversion unit 18 are connected via the I / O 22, and the start and end of those processes and the control of the processing contents are performed.

  A control program for the controller 20 to control the operation of the child device 1 is stored in the ROM 24. And when cordless handset 1 is used as a transmitter, controller 20 controls cordless handset 1 to function as a transmitter. Further, the operation in which the baseband processing unit 13 outputs data for data communication to the transmission unit 12 is performed under the control of the controller 20.

  The RAM 23 of the controller 20 stores data for generating a communication frame transmitted from the child device 1. For example, the RAM 23 is data for forming a header portion of a communication frame, and includes a preamble, a synchronization word (hereinafter referred to as SW), a radio information channel (hereinafter referred to as RI), and low-speed associated control. Stores channel information (Slow Associated Control CHannel: hereinafter referred to as SACCH) and parameter information (Parameter Information CHannel: hereinafter referred to as PICH).

  The controller 20 is connected to, for example, a USB (Universal Serial Bus) interface, and data of an external device connected to the USB interface is input to the controller 20. It is also possible to connect a personal computer as an external device to the USB interface and control the slave unit 1 by this personal computer.

  The timer unit 25 can use, for example, a subtraction counter that subtracts a counter value by a clock pulse and generates an interrupt output when the counter value becomes zero. When a certain value is set in the counter, a predetermined time can be measured by counting the set number of clock pulses and interrupting the CPU 21.

  The display unit 26 is composed of a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), an LED (Light Emission Diode), or the like, and is a repeater that designates the slave unit 1 or designates the repeater 2 to be called. The calling mode of the designated mode, the status of the slave unit 1 or repeater 2 of the transmission destination, and other information of the slave unit 1 are displayed.

  The operation unit 27 corresponds to an input unit for inputting condition information regarding the operation of the child device 1. The operation unit 27 is provided with various operation keys. That is, when the user operates the operation key of the operation unit 27 of the child device 1 and inputs the operation condition, the child device 1 can be operated based on the input.

  The contents of the operation on the operation unit 27 are detected by the controller 20. That is, the controller 20 detects the type of the operated operation key and the content of the operation on the operation key. Then, the contents input by the operation key are determined. And the controller 20 controls the subunit | mobile_unit 1 so that operation | movement according to the content input by the operation part 27 may be performed.

  Depending on the content of the operation of the operation key, the content input by the operation is displayed on the display unit 26. For example, when the call repeater selection for selecting the repeater 2 that activates the call is set by the operation unit 27, a list of the repeaters 2 that activate the call is displayed on the display unit 26. In addition, the status of the repeater 2 that activated the call is displayed. Further, the display unit 26 displays a notification of the operating state of the child device 1 to the user, a message that prompts the user to input by the operation unit 27, and the like.

  Here, a block when the subunit | mobile_unit 1 functions as a transmitter is demonstrated. The call sound by the user of the handset 1 is converted into an audio signal by the microphone 15, and this audio signal is input to the A / D converter 14. The audio signal input to the A / D converter 14 is amplified by an amplifier and then converted into a digital signal by audio A / D conversion. The digitally converted signal is input to the baseband processing unit 13. The baseband processing unit 13 adds a preamble, a frame synchronization signal (FS), control information (CCH), PICH, etc. to the digital data, assembles it into a communication frame, and outputs it to the transmission unit 12. In the PICH, the identification code (ID) of the slave unit 1 is incorporated as an originating ID, and the identification code of the destination slave unit 1 is incorporated as a destination ID.

  The transmitter 12 has a modulation function for modulating the input signal. In the example of the handset 1, as a method for the transmission unit 12 to modulate a signal, GMSK (Gaussian filtered Minimum Shift Keying), PSK (Phase Shift Keying), QAM (Quadrature Amplitude Modulation), FSK (Frequency Shift Keying), or the like is used. Used. The transmission unit 12 performs a process of modulating the input audio signal and data signal using these modulation methods.

  The transmission unit 12 outputs the signal subjected to the modulation process to the transmission / reception switching unit 11. When the slave unit 1 functions as a transmitter, the transmission / reception switching unit 11 is formed with a circuit that guides the signal input from the transmission unit 12 to the antenna 11A. And the signal input into the transmission / reception switching part 11 is output to the antenna 11A, and is transmitted to the receiver of the repeater 2 which becomes the other party of the subunit | mobile_unit 1 from the antenna 11A.

  The baseband processing unit 13 assembles various control signals in order to execute the communication protocol. The operation of the baseband processing unit 13, the start and end of transmission by the transmission unit 12, the selection of the frequency, and the like are performed by control of the controller 20. The setting of the preamble and SW length, the contents of RI, SACCH, and PICH is performed under the control of the controller 20.

  Next, a block when the subunit | mobile_unit 1 functions as a receiver is demonstrated. A call signal, a voice signal for call sound, or a data signal for data communication is transmitted from the transmitter of the repeater 2 to the slave unit 1 as a receiver. The signal transmitted to the subunit | mobile_unit 1 comprises the communication frame.

  The antenna 11 </ b> A receives a radio signal transmitted to the child device 1. The radio signal received by the antenna 11 </ b> A is input to the receiving unit 16 via the transmission / reception switching unit 11. The transmission / reception switching unit 11 is formed with a circuit for guiding the signal received by the antenna 11A to the receiving unit 16 when the slave unit 1 functions as a receiver.

  The receiving unit 16 has a tuning function for selecting and receiving radio waves of a specific frequency. In the receiver 16, the frequency band of the received radio signal is set by the controller 20. Then, the reception signal of the frequency channel set in the receiving unit 16 is input to the receiving unit 16 from the antenna 11A through the transmission / reception switching unit 11.

  The signal received by the receiving unit 16 is input to the baseband processing unit 17, and each piece of information is extracted by the baseband processing unit 17 and transmitted to the controller 20. When the identification code (ID) of the handset 1 is extracted as the destination ID in the PICH in the call signal, the controller 20 starts communication.

Next, the configuration of the repeater 2 will be described.
FIG. 3 is a block diagram illustrating a configuration example of the repeater 2.
The repeater 2 shown in FIG. 3 has a transmission function and a reception function. The reception function receives a signal transmitted by the slave unit 1 via the uplink. The transmission function transmits a signal received by the receiver or a signal received from the network N on the downlink.

  The repeater 2 includes an antenna 30S, a transmission unit 32, a baseband processing unit 33, and an input unit 34 in order to realize a transmission function as shown in FIG. The repeater 2 also includes an antenna 30R, a receiving unit 36, a baseband processing unit 37, and an output unit 35 in order to realize a receiving function. Furthermore, a network interface (hereinafter referred to as a network I / F) 38 is provided that transmits a received signal to another repeater 2 via the network N and receives a signal from the other repeater 2 via the network N. Yes.

  The repeater 2 includes a controller 40 that controls each unit, a display unit 46 that displays a communication mode, and an operation unit 47 that inputs settings such as a communication mode.

  The controller 40 controls the operation of the repeater 2. The controller 40 includes, for example, a CPU (central processing unit) 41, an I / O (input / output device) 42, a ROM (read only memory) 44, a RAM (read / write memory) 43, and an internal bus (not shown) for connecting them. ).

  A timer unit 45, a display unit 46, and an operation unit 47 are connected to the controller 40 via the I / O 42. In order to avoid the complexity of FIG. 3 and to facilitate understanding, signal lines from the controller 40 to each unit are omitted, but the controller 40 includes a transmission unit 32, baseband processing units 33 and 37, a reception unit 36, It is connected to the input unit 34, the output unit 35, and the network I / F 38 via the I / O 42, and controls the start and end of those processes and the processing contents.

  A control program for the controller 40 to control the operation of the repeater 2 is stored in the ROM 44. Then, the controller 40 performs control to transmit the call signal from the transmission unit or to transmit the call activation signal to the network N based on the call activation signal received from the uplink. Further, the controller 40 controls to transmit a call signal from the transmission unit in response to the call activation signal received from the network N. Information for these controls is stored in the RAM 43.

Data for generating a communication frame transmitted by the repeater 2 is stored in the RAM 43 of the controller 40. For example, the RAM 43 stores information such as a preamble, SW, RI, SACCH, and PICH, which are data for configuring the header portion of the communication frame.
Further, the RAM 43 stores identification information of the subordinate slave units 1 and also stores a black list described later. The identification information of the subordinate slave units 1 is used when the repeater 2 relays communication between the subordinate slave units 1, and loopback communication between the subordinate slave units 1 is performed. The black list is composed of identification information given from the management server S when the repeater 2 is turned on, for example, and communication of the slave unit 1 corresponding to this identification code is prohibited.

  The display unit 46 includes a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), or an LED (Light Emission Diode), and information such as a communication status in which the repeater 2 is communicating with the slave unit 1 or the network N. Is displayed.

  The operation unit 47 is input means for inputting condition information regarding the operation of the repeater 2. The operation unit 47 is provided with various operation keys. That is, when the operator operates the operation key of the operation unit 47 of the repeater 2 and inputs an operation condition, the repeater 2 can perform an operation based on the input. For example, an online operation mode connected to the network N, a stand-alone operation mode not connected to the network N, and the like are selected.

Next, a configuration example of the management server S will be described.
FIG. 4 is a block diagram illustrating a configuration example of the management server S.
The management server S connects, for example, a CPU (central processing unit) 51, an I / O (input / output device) 52, a ROM (read only memory) 54, a RAM (read / write memory) 53, a network I / F 55, and the like. An internal bus (not shown) is provided.

  A display unit 56 and an operation unit 57 are connected to the management server S via the I / O 52. A network I / F 55 is connected to the network N via the hub 3A.

  A control program for controlling the management server S is stored in the ROM 54. Information for controlling the wireless communication system 10 is stored in the RAM 53.

FIG. 5 is a diagram showing the contents stored in the RAM 53.
The RAM 53 stores a subordinate information table indicating the subordinate slave units 1 for each repeater 2. This subordinate information table is updated by periodically updating with each repeater 2.

The RAM 53 further stores two types of black lists BL1 and BL2. The black lists BL1 and BL2 are configured with identification codes indicating the child device 1 and the like that have been stolen.
The black lists BL1 and BL2 may be input by the administrator using the operation unit 57, or may be input from a computer (not shown) via the network N using a WEB browser.

  The blacklist BL1 is for preventing communication from being relayed through the plurality of repeaters 2. The black list BL2 is for prohibiting return communication at each repeater 2. For example, as shown in FIG. 5, the slave unit 1 </ b> F in which the identification code is written in both the black lists BL <b> 1 and BL <b> 2 is prohibited from both communication across the repeater 2 and return communication at the repeater 2. As shown in FIG. 5, the slave unit 1A in which the identification code is written only in the black list BL1 is prohibited from communicating across the repeater 2, but the return communication with the repeater 2 is possible. If the identification code is written in the black list BL2, the identification code is transmitted as the black list registered slave unit 1 to the repeater 2 under the slave unit 1 corresponding to the identification code, and stored in the RAM 43 of the repeater 2 Written to the blacklist.

  Further, the black list stored in the RAM 53 may be one type instead of the two types of black lists BL1 and BL2. In this case, the identification level of the slave unit 1 that prohibits communication is stored in association with a restriction level that indicates whether communication via the plurality of repeaters 2 is prohibited or whether return communication is prohibited at each repeater 2. . The identification code of the slave unit 1 having a restriction level for prohibiting the loopback communication at each repeater 2 is extracted from the black list, and the blacklist registered slave unit is added to the repeater 2 under the slave unit 1 corresponding to the identification code. The identification code is transmitted as 1 and written in the black list of the RAM 43 of the repeater 2.

  The display unit 56 includes a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), or an LED (Light Emission Diode), and displays information such as a communication status during communication.

  The operation unit 57 is provided with various operation keys. That is, the operator can cause the management server S to perform an operation based on the input by operating the operation keys of the operation unit 47 to input various conditions and the like.

Next, operations of the repeater 2 and the management server S will be described.
The antenna 30 </ b> R of the repeater 2 receives a radio signal transmitted to the repeater 2. The radio signal received by the antenna 30R is input to the receiving unit 36. The receiving unit 36 has a tuning function for selecting and receiving radio waves of a specific frequency. In the receiving unit 36, the frequency band of the received radio signal is set by the controller 40.

  The signal received by the receiving unit 36 is input to the baseband processing unit 37, and each piece of information is extracted by the baseband processing unit 37 and transmitted to the controller 40. The call activation signal is received, and the arrival ID and the calling ID are extracted from the call activation signal.

  When the ID of the slave unit 1 under the repeater 2 is extracted as the originating ID, the controller 40 checks the black list in the RAM 43, and if the ID of the slave unit 1 is indicated in the black list, the controller 40 Discard. If the ID of the child device 1 is not shown in the black list, it is determined whether the destination ID is the subordinate child device 1 or not. If the ID of the slave unit 1 under the repeater 2 is the destination ID, the controller 40 checks the black list in the RAM 43, and if the ID of the slave unit 1 is indicated in the black list, the transmission destination is unknown. Is transmitted to the transmission source child device 1, and if the ID of the child device 1 is not indicated in the black list, transmission of a call signal to the child device 1 is started.

  When the destination ID is not the slave unit 1 under the subordinate but the slave unit 1 under the control of the other repeater 2, the controller 40 of the repeater 2 makes an inquiry by presenting the destination ID and the calling ID to the management server S.

  The management server S detects whether or not an identification code corresponding to the destination ID or the calling ID is included in the black list BL1. When the identification code corresponding to the caller ID is included in the blacklist BL1, the management server S notifies the inquirer repeater 2 that the response is abnormal. The repeater 2 that has received the “response abnormality” notification from the management server S determines that the child device 1 under its control as the transmission source is the child device 1 registered in the blacklist BL1, and transmits a communication frame. Discard.

When the identification code corresponding to the destination ID is included in the black list BL1, and the identification code corresponding to the calling ID is not included in the black list BL1, the management server S sends the “transmission destination” to the repeater 2 as the inquiry source. Notify ". The repeater 2 that has received the notification of “transmission destination unknown” from the management server S notifies the slave unit 1 under its control as the transmission source of “transmission destination unknown”.
When the RAM 53 stores one type of black list, it checks whether the incoming ID or outgoing ID is a restriction level that prohibits communication through the plurality of repeaters 2 and performs the same operation as described above. .

  When the destination ID and the source ID are not included in the black list BL1, the management server S detects the repeater 2 under the slave unit 1 corresponding to the destination ID from the subordinate information table, and determines the destination network address. The repeater 2 is notified together with information indicating that “response is normal”. The repeater 2 that has received them attaches a network address to the signal received by the receiving unit 36 and transmits the signal to another repeater 2.

When the received signal is transmitted to another repeater 2, it is transmitted to the hubs 3A and 3B and the network N via the output unit 35 and the network I / F 38.
When the signal received by the receiving unit 36 is wirelessly transmitted to the communication range of the repeater 2, data is sent from the baseband processing unit 37 to the baseband processing unit 33. The baseband processing unit 33 adds a preamble, SW, RI, etc. to the data, assembles it into a transmission frame, and outputs it to the transmission unit 32.

  The transmitter 32 has a modulation function for modulating the input signal. In the example of the handset 1, as a method for the transmission unit 32 to modulate a signal, GMSK (Gaussian filtered Minimum Shift Keying), PSK (Phase Shift Keying), QAM (Quadrature Amplitude Modulation), FSK (Frequency Shift Keying), or the like is used. Used. The transmission unit 32 performs a process of modulating the input audio signal and data signal using these modulation methods.

  The transmission unit 32 outputs the signal subjected to the modulation process to the antenna 30S and transmits the signal to the receiver of the slave unit 1 from the antenna 30S.

  The baseband processing unit 33 assembles various control signals in order to execute the communication protocol. The operation of the baseband processing unit 33, the start and end of transmission of the transmission unit 32, selection of the frequency, and the like are performed under the control of the controller 40. The setting of the preamble and SW length, the contents of RI, SACCH, and PICH is performed under the control of the controller 40.

  From the signals received from the network N and the hubs 3A and 3B via the network I / F 38, data is extracted at the input unit 34 and sent to the controller 40. When signals received from the network N and the hubs 3 </ b> A and 3 </ b> B are transmitted to the communication area of the repeater 2, data received by the network I / F 38 is sent from the input unit 34 to the baseband processing unit 33. The baseband processing unit 33 assembles a transmission signal and transmits it from the transmission unit 32.

  When the call activation signal is received from the network N and the hubs 3A and 3B via the network I / F 38, and the ID of the slave unit 1 under the repeater 2 is included as the destination ID, the controller 40 The transmission of the calling signal to the handset 1 is started.

  As described above, in the wireless communication system 10 according to the present embodiment, the blacklists BL1 and BL2 can be used to limit communication between the slave units 1 in stages. That is, in addition to the slave unit 1 that can communicate with all the other slave units 1, the slave unit 1 that is prohibited from communication and the slave unit 1 that can perform loopback communication using the repeater 2 are set. be able to.

It is a block diagram which shows the radio | wireless communications system which concerns on embodiment of this invention. It is a block diagram which shows the structural example of a subunit | mobile_unit. It is a block diagram which shows the structural example of a repeater. It is a block diagram explaining the structural example of a management server. It is a figure which shows the memory content of RAM of a management server.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A-1F Wireless communication apparatus 2, 2A-2D Repeater 3A, 3B Hub N Network S Management server 11 Transmission / reception switching part 12, 32 Transmission part 13,33 Baseband process part 16,36 Reception part 17,37 Baseband process Unit 20, 40 Controller 21, 41, 51 CPU
22, 42, 52 I / O
23, 43, 53 RAM
24, 44, 54 ROM
25 Timekeeping section 27, 47, 57 Operation section 34 Input section 35 Output section 38, 55 Network I / F

Claims (4)

A plurality of repeaters installed in different areas and connected to each other, each storing identification information of subordinate wireless terminals in the arranged areas, and connected to the plurality of repeaters, And a management server for grasping position information indicating which relay device the subordinate radio terminal is subordinate to, and each repeater stores communication between the subordinate radio terminals in each repeater. Relaying using the identification information, and performing communication between the subordinate radio terminal and the radio terminal subordinate to another repeater, the location information of the radio terminal subordinate to the other repeater is A communication system that receives a communication with a management server and relays based on the position information,
The management server
First storage means for storing information of a first designated wireless terminal designated in advance among wireless terminals under the plurality of repeaters;
Communication between the first designated wireless terminal and a wireless terminal under the control of another repeater that does not have the first designated wireless terminal is based on information stored in the first storage means. A first prohibition means to prohibit;
A communication system comprising: Each repeater is
Second storage means for storing information of a second designated wireless terminal designated in advance among subordinate wireless terminals;
Communication between the second designated wireless terminal and a wireless terminal other than the second designated wireless terminal among the plurality of wireless terminals under the plurality of repeaters is stored in the second storage means. A second prohibition means for prohibition based on the received information,
The communication system according to claim 1, wherein each communication system is provided. A plurality of repeaters installed in different areas and connected to each other, each storing identification information of subordinate wireless terminals in the arranged areas, and connected to the plurality of repeaters, And a management server for grasping position information indicating which relay device the subordinate radio terminal is subordinate to, and each repeater stores communication between the subordinate radio terminals in each repeater. Relaying using the identification information, and performing communication between the subordinate radio terminal and the radio terminal subordinate to another repeater, the location information of the radio terminal subordinate to the other repeater is A communication control method for receiving via communication with a management server and relaying based on the location information,
A first storage process for storing, in the management server in advance, information on a designated first designated wireless terminal among wireless terminals under the plurality of repeaters;
Communication between the first designated wireless terminal and a wireless terminal under the control of another repeater that does not have the first designated wireless terminal is prohibited based on the information stored in the first storage process. A first prohibition process to
The communication control method characterized by including. A second storing process for storing information of a second designated wireless terminal designated in advance among subordinate wireless terminals in each of the repeaters;
In each repeater, communication between the second designated wireless terminal and a wireless terminal other than the second designated wireless terminal among the plurality of wireless terminals under the plurality of repeaters is performed by the second repeater. A second prohibition process prohibited based on the information stored in the storage process of
The communication control method according to claim 3, further comprising:

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