JP4459762B2 - Integrated broadcast communication system - Google Patents

Description

  The present invention relates to an integrated broadcast communication system in which a plurality of broadcast communication systems installed for disaster prevention administration, for example, in each municipality are integrated.

The broadcast communication system for disaster prevention administration is configured by adding a master station and a plurality of slave stations, or relay stations thereto, for example. The master station is installed in the municipal office, etc., and wirelessly transmits a selection signal and a notification signal to the slave station. Each slave station receives a report signal when a call signal addressed to itself is sent from the master station, and notifies the residents by decoding the received report signal and outputting it loudly from a speaker. There are two types of slave stations: the outdoor type and the door-to-door type. The outdoor type is capable of two-way communication with the master station. On the other hand, the door-to-door type can only receive. The relay station is installed in a place with good visibility such as Yamagami, and the relay wave transmitted from the parent station is frequency-converted into a broadcast wave and transmitted to the child station (for example, see Non-Patent Document 1). .)
“Municipal digital broadcast communication system recommended standard (draft)” Radio Industry March, 2003.

  By the way, in recent years, mergers of municipalities have been actively implemented or studied. When a municipal merger is performed, it is necessary to integrate or change the broadcast communication system between municipalities. However, the broadcast communication system is installed and operated independently for each municipality, and the operation forms such as the radio frequency used between systems and assignment of slave station identification information to each slave station are different.

  Therefore, conventionally, for example, in at least one of the systems to be integrated, a plurality of systems are integrated by changing the radio frequency and operation mode used by the master station and the slave station group. However, such a system change method requires a great amount of labor and time for the change work because the configuration must be changed for each of a large number of slave stations as well as the master station. Above all, in order to make changes to existing equipment, all or part of the system must be temporarily suspended during the change work period. If a disaster occurs suddenly during this period, the system May not function and may interfere with evacuation guidance.

  The present invention has been made paying attention to the above circumstances, and its purpose is to enable integration of a plurality of systems without changing existing equipment, thereby greatly reducing the labor and time required for the change work. Another object of the present invention is to provide an integrated broadcast communication system that can reduce the operation suspension period of the system and maintain high system reliability.

  In order to achieve the above object, the present invention provides a first call signal and a notification from a parent station to a plurality of first slave stations by disposing a master station and a plurality of first slave stations in a first area. A first system for transmitting a signal using a first radio frequency, and a second call signal and a notification signal using a second radio frequency in a second area different from the first area. In an integrated broadcast communication system comprising a second system provided with a plurality of second slave stations for receiving, a conversion device is installed in the first area. In this converter, the first call signal and the notification signal transmitted from the master station of the first system are received by the first radio frequency, and the received first call signal is received by the second Is converted into a call signal. Then, the converted second calling signal and the notification signal received by the first radio frequency are transmitted to the plurality of second slave stations using the second radio frequency. It is a thing.

  Therefore, according to the present invention, the signal destined for the first slave station transmitted from the master station of the first system is converted into a format corresponding to the second system after the description content is converted by the converter. Retransmitted to the second group of slave stations using a radio frequency corresponding to the second system. For this reason, it is not necessary to change the existing facilities such as the master station and the slave station at all in the first and second systems, thereby greatly reducing labor and time required for the change work. Above all, the system operation suspension period associated with system integration can be made extremely short, thereby maintaining high system reliability against sudden disasters.

  Further, the conversion device may be attached to any one of a plurality of first slave stations belonging to the first system or to a relay station. If it does in this way, it will become possible to utilize the receiving means of the 1st paging signal and report signal with which the 1st child station or relay station was equipped as it is, and, thereby, size reduction of the circuit configuration of a converter is simple. Can do.

In short, according to the present invention, a conversion device is provided in the area of the first system, and in this conversion device, the description content of the signal for the first slave station transmitted from the master station of the first system is stored in the second system. Then, re-transmission is performed toward the second slave station group using a radio frequency corresponding to the second system.
Therefore, according to the present invention, it becomes possible to integrate a plurality of systems without changing existing facilities, thereby greatly reducing the labor and time required for the change work and shortening the operation stop period of the system. It is possible to provide an integrated broadcast communication system that can maintain high reliability.

(First embodiment)
FIG. 1 is a schematic configuration diagram showing a first embodiment of an integrated broadcast communication system according to the present invention. The communication system of this embodiment is an integration of the digital broadcast communication system operated by City A and the digital broadcast communication system operated by Town B with the merger of City A and Town B.

  In the area EA of A city, a master station BSA and a plurality of slave stations are arranged. Bidirectional or unidirectional wireless communication is performed between the master station BSA and each slave station directly or via a relay station (not shown). As a radio communication system, for example, a TDMA-TDD (Time Division Multiple Access-Time Division Duplex) system is used, and as a radio frequency, a radio frequency fA assigned in advance to the system of City A is used.

  Other wireless communication methods include FDMA-FDD (Frequency Division Multiple Access-Frequency Division Duplex), CDMA-FDD (Code Division Multiple Access-Frequency Division Duplex), and CDMA-TDD (Code Division Multiple Access-). It is also possible to adopt the Time Division Duplex) method. As a modulation method, a phase modulation method such as QPSK (Quadriphase Phase Shift Keying) is generally used, but a phase amplitude modulation method such as a frequency modulation method or QAM (Quadrature Amplitude Modulation) can also be used. is there.

  The master station BSA is installed in, for example, a municipal office, and includes a console 1 and a wireless device 2. The console 1 has an input interface function for receiving an input of a call instruction and a notification voice when a system operator makes a report to a desired slave station, and an output interface function for outputting a call signal coming from the slave station and reporting it. With. The radio apparatus 2 generates a downlink radio signal modulated by the call signal and the notification signal output from the console 1, and transmits the generated downlink radio signal using the radio frequency fA. Further, it receives and demodulates the uplink radio signal that has arrived from the slave station using the radio frequency fA, and transfers the call signal reproduced by this demodulation to the console 1 in order to notify the system operator.

The slave stations include outdoor communication devices FSA1 to FSAn and indoor communication devices GSA1 to GSAm.
The outdoor-type communication devices FSA1 to FSAn are installed in a school yard, for example. When the call signal arrived from the master station BSA by the downlink radio signal includes the slave station identification information (hereinafter referred to as slave station ID) of the own apparatus, the notification operation state is entered. In this state, the notification signal arriving from the master station BSA by the downlink radio signal is received and demodulated, and the notification sound reproduced by this demodulation is output from the outdoor loudspeaker to the neighboring residents. The outdoor type communication devices FSA1 to FSAn have a transmission function. Then, an uplink radio signal is generated by modulating the call signal input by the residents, and the generated uplink radio signal is transmitted to the master station BSA.

  On the other hand, the indoor communication devices GSA1 to GSAm have only a reception function and are installed in each residence of residents. Hereinafter, this indoor communication device is referred to as a door-to-door receiver. Similarly to the outdoor type communication devices FSA1 to FSAn, the individual receivers GSA1 to GSAm are also informed when the call signal arrived by the downlink radio signal from the master station BSA includes the slave station ID of the own device. Become. In this state, the notification signal arriving from the master station BSA by the downlink radio signal is received and demodulated, and the notification sound reproduced by this demodulation is output from the speaker to the residents in the residence.

  On the other hand, a master station and a plurality of slave stations are arranged in the area of town B as well as city A. However, since the master station BSA in A city also serves as the parent station in B town due to system integration, the master station in B town is not used. The slave station in town B is also composed of outdoor type communication devices FSB1 to FSBk and indoor type communication devices GSB1 to GSB1, and the configuration is the above mentioned A city outdoor type communication devices FSA1 to FSAn and the individual receiver GSA1. ~ Same as GSAm. However, the radio frequency fB different from the above-mentioned A city system is assigned to the B town system, and the outdoor communication devices FSB1 to FSBk and the individual receivers GSB1 to GSB1 in B town are assigned to this B town. The received radio frequency fB is received. As a wireless communication system, the TDMA-TDD system is used in the same manner as the above-mentioned system in the city A.

  A different municipal code is assigned to each of the A city system and the B town system, and a slave station ID is assigned to each slave station of the A city system and each slave station of the B city system. The slave station ID of each system is arbitrarily set by the system administrator for each system.

  By the way, in the integrated broadcast communication system of the first embodiment, the outdoor type communication device (outdoor type slave station) FSAi installed in the area EA in the city A and close to the area EB in the town B is used. A conversion device MS is attached. FIG. 2 is a block diagram showing the configuration of the conversion device MS together with the configuration of the outdoor type communication device FSAi.

  The outdoor-type communication device FSAi includes an antenna 11, a radio unit 12, and a slave station control unit 13, and further includes an output interface 14, an outdoor loudspeaker 15, an input interface 16, and a microphone 17. . The antenna 11 and the radio unit 12 receive and demodulate the downlink radio signal transmitted from the master station BSA, and input the calling signal and the notification signal reproduced by this demodulation to the slave station control unit 13.

  The slave station control unit 13 decodes the input call signal and collates the slave station ID included in the decoded data with the slave station ID held by the own device. When both the slave station IDs coincide with each other, the notification operation state is entered. In this state, the notification signal input from the wireless unit 12 is voice-decoded, and the decoded and reproduced call voice signal is supplied to the output interface 14. The output interface 14 amplifies the supplied call voice signal to a predetermined loudness level and then outputs the loudspeaker from the outdoor loudspeaker 15. Further, the slave station control unit 13 transfers the calling signal and the notification signal input from the wireless unit 12 to the conversion device MS as they are.

  The microphone 17 and the input interface 16 are for inputting the resident's transmission voice, and supply the input transmission signal to the slave station control unit 13. The slave station control unit 13 encodes the supplied transmission signal and outputs it to the radio unit 12. The radio unit 12 generates an uplink radio signal modulated by the encoded transmission signal, and transmits the generated uplink radio signal from the antenna 11 to the master station BS using the radio frequency fA.

  On the other hand, the conversion apparatus MS includes a slave station interface 21, a conversion control unit 22, a storage unit 23, a radio unit 24, an antenna 25, and a maintenance interface 26. The slave station interface 21 is connected to the slave station controller 13 of the outdoor communication device FSAi via a signal cable. Then, the call signal and the notification signal transferred from the slave station control unit 13 are received and temporarily held.

  The storage unit 23 is provided with a municipal code conversion table 23a and a slave station ID conversion table 23b. The municipality code conversion table 23a stores the municipality code CB of the B town system as the conversion destination in association with the municipality code CA of the A city system. In the slave station ID conversion table 23b, the IDs of the slave stations belonging to the B town system as the conversion destination are stored in association with the IDs of the slave stations belonging to the A city system. FIGS. 3 and 4 show examples of stored data of the municipal code conversion table 23a and the slave station ID conversion table 23b, respectively.

  The conversion control unit 22 includes a microcomputer as a main control unit, and includes a call signal conversion function 22a and a signal transmission control function 22b as control functions related to the present invention. All of these control functions are realized by causing a CPU (Central Processing Unit) to execute an application program stored in a program memory (not shown).

  The call signal conversion function 22a takes in the call signal from the slave station interface 21 and decodes it, and the selective call data reproduced by this decoding, that is, the municipal code and the slave station ID, is converted into the municipal code conversion table 23a and the slave station ID. Based on the data stored in the conversion table 23b, the data is converted into the corresponding municipal code and slave station ID of the B town system.

  The signal transmission control function 22b generates a call signal by encoding the municipality code and slave station ID of the B town system converted by the call signal conversion function 22a, and outputs the generated call signal to the radio unit 24. To do. At the same time, the notification signal fetched from the slave station interface 21 is supplied to the radio unit 24 as it is.

  The radio unit 24 generates a radio signal modulated by the calling signal and the notification signal supplied from the conversion control unit 22. The generated radio signal is frequency-converted to a radio frequency fB assigned to the B town system, amplified to a predetermined transmission power level, and transmitted from the antenna 25 to the B town area EB.

  The maintenance interface 26 is connected to a maintenance personal computer (not shown). By using this personal computer for maintenance, for example, it is possible to update the stored data of the municipal code conversion table 23a and the slave station ID conversion table 23b.

Next, the operation of the integrated broadcast communication system configured as described above will be described. FIG. 5 is a flowchart showing the conversion control procedure and control contents of the conversion apparatus MS, which is the main part of this system.
Downlink radio signals transmitted from the master station BSA of the city A system are respectively received by the outdoor communication devices FSA1 to FSAn and the individual receivers GSA1 to GSAm belonging to the city A system. In these outdoor-type communication devices FSA1 to FSAn and door-to-door receivers GSA1 to GSAm, first, the municipality code and the slave station ID included in the received call signal are collated with the municipality code and the slave station ID previously held in the own device. When both codes and both slave station IDs match, a report signal can be received.

  Subsequently, when a notification signal arrives, the notification signal is received and demodulated, decoded, and output from the outdoor loudspeaker and speaker. Thus, notification is made at the slave station selected by the paging signal among the outdoor type communication devices FSA1 to FSAn and the door-to-door receivers GSA1 to GSAm belonging to the A city system.

  On the other hand, the downlink radio signal transmitted from the master station BSA of the system in the city A is also received by the outdoor communication device (outdoor slave station) FSAi. In the outdoor type communication device FSAi, the downlink radio signal transmitted from the master station BSA is received and demodulated by the radio unit 12, and the call signal and the notification signal regenerated by this demodulation are transferred from the slave station control unit 13 to the conversion device MS. Is done.

  When the signal is transferred from the outdoor type communication device FSAi, the conversion device MS first determines whether the transferred signal is a call signal or a notification signal in the conversion control unit 22 in step 6a. If it is a call signal as a result of this determination, the call signal is decoded, and then the process proceeds to step 6b, where the municipal code of A city and the child station ID corresponding to the municipal code and child station ID reproduced by this decoding are reproduced. The ID is read from the municipality code conversion table 23a and the slave station ID conversion table 23b in the storage unit 23. In step 6c, the municipal code and the slave station ID of the A city are replaced with the read municipal code and the slave station ID of the B town.

  By such a conversion process, the municipal code CA of A city is converted into a code CB of B town as shown in FIG. For example, if IDA is received as the slave station ID of A city, this IDA is converted to IDB5 of the corresponding slave station of B town as shown in FIG. Therefore, for example, the slave station ID assigned to the fire brigade in A city is converted into the slave station ID assigned to the fire brigade in town B. Further, the slave station ID assigned to the residents in the A2 area of the A city is converted into the slave station ID assigned to the area adjacent to the A2 area of the B town. Furthermore, the slave station ID assigned to a predetermined manager in City A is converted into a slave station ID of a manager corresponding to the official in B City.

  Subsequently, the conversion device MS generates a call signal by encoding the municipality code and the slave station ID, and outputs the generated call signal to the radio unit 24 in step 6d. At the same time, the report signal fetched from the slave station interface 21 is output to the radio unit 24 as it is. At this time, the notification signal may be decoded and reproduced by the conversion control unit 22 and then re-encoded and output. In this way, when a code error occurs in the notification signal, it is possible to retransmit the code error to the slave station group in town B after correcting the code error in the converter MS.

  When the calling signal and the notification signal are supplied from the conversion control unit 22, the wireless unit 24 generates a wireless signal modulated by these signals. The generated radio signal is frequency-converted to a radio frequency fB assigned to the B town system, amplified to a predetermined transmission power level, and transmitted from the antenna 25 to the B town area EB. At this time, the transmission power level is set to a level at which the downlink radio signal can be received in the entire area EB of B town.

  Therefore, the calling signal and the notification signal transmitted from the conversion device MS are respectively received by the outdoor communication devices FSB1 to FSBk and the door-to-door receivers GSB1 to GSB1 belonging to the B town system. Then, the outdoor communication apparatus or the door-to-door receiver that holds the slave station ID included in the call signal is in a report operation enabled state, and the report signal received in this state is output loudly.

  As described above, in the first embodiment, the conversion device MS is attached to the outdoor type communication device FSAi arranged near the boundary with the town B of the city A. In the conversion device MS, the base station BSA of the city A is provided. Is converted into a call signal corresponding to the town B based on the data of the municipal code conversion table 23a and the slave station ID conversion table 23b, and the converted call signal and the parent station of the city A are converted. A notification signal arriving from BSA is transmitted to area EB in town B using radio frequency fB allocated to the system in town B.

  Therefore, according to the first embodiment, it is not necessary to change the existing facilities such as the master station and the slave station at the time of system integration in the A city and B town systems, thereby greatly reducing the labor and time required for the change work. Can be reduced. Above all, the system operation suspension period associated with system integration can be made extremely short, thereby maintaining high system reliability against sudden disasters.

  Moreover, since the conversion device MS is attached to the existing outdoor communication device FSAi in the city A, the antenna 11 and the radio unit 12 provided in the outdoor communication device FSAi can be used as they are. Therefore, the circuit configuration of the conversion device MS can be easily reduced in size as compared with the case where the conversion device MS is installed independently.

(Second Embodiment)
In the second embodiment of the present invention, an integrated console that supervises a plurality of existing systems is newly provided, and a conversion device is provided between the integrated console and the plurality of existing systems. The integrated call instruction output from the integrated console is converted into call instruction data having contents corresponding to each system, and the converted call instruction data is given to the master station of each system.

  FIG. 7 is a schematic configuration diagram showing a second embodiment of the integrated broadcast communication system according to the present invention. In the figure, an integrated console HS is provided above the C city system and the D city system. The integrated console HS is connected to the master station BSC of the C city system and the master station BSD of the D city system via wired lines. Further, conversion devices MSC and MSD are respectively inserted between the integrated console HS and the master stations BSC and BSD of each system.

  The integrated console HS outputs common call instruction data and report data common to each system. The conversion devices MSC and MSD each have a conversion table, and convert the common integrated call instruction data into call instruction data corresponding to the C city system and D city system, respectively, based on the conversion table. Then, the converted call instruction data and the report data output from the integrated console HS are given to the master station BSC of C city and the master station BSD of D city. The functions of the converters MSC and MSD can be provided in the integrated console HS.

Each of the master stations BSC and BSD is composed of consoles 1C and 1D and radio devices 2C and 2D. The consoles 1C and 1D respectively generate a call signal and a report signal according to the call instruction data and the report data given from the converters MSC and MSD, and the generated call signal and report signal are transmitted to the radio devices 2C and 1C, respectively. Supply to 2D. Each of the radio devices 2C and 2D generates a downlink radio signal modulated by the supplied call signal and notification signal. The generated downlink radio signals are converted into the radio frequency fC assigned to the C city system and the radio frequency fD assigned to the D city system, respectively. Transmission is performed to the slave stations FSC1 to FSCn, FSD1 to FSDk, GSC1 to GSCm, and GSD1 to GSDl existing in the area ED.
The operations of the slave stations FSC1 to FSCn, FSD1 to FSDk, GSC1 to GSCm, and GSD1 to GSDl are the same as those of the slave stations described in the first embodiment.

  Therefore, in accordance with the integrated call instruction data output from the integrated console HS, in each of the C city system and the D city system, the slave stations FSC1 to FSCn, FSD1 to FSDk, GSC1 to GSCm, and GSD1 to GSDl are selectively used. A report is made.

  On the other hand, uplink radio signals transmitted from the outdoor communication devices FSC1 to FSCn and FSD1 to FSDk of the C city system and D city system are received and demodulated by the master stations BSC and BSD, respectively. Then, the transmission signal reproduced by this demodulation is transferred from the master stations BSC and BSD to the integrated console HS via the wired line and the converters MSC and MSD, and is output to the integrated console HS.

  Therefore, according to the second embodiment, as in the first embodiment, it is not necessary to change the existing facilities such as the master station and the slave station at all in the system of C city and D city at the time of system integration. Therefore, the labor and time required for the change work can be greatly reduced. In addition, since the existing master stations BSC and BSD continue to be used in each system, it is possible to eliminate the system downtime associated with system integration, thereby maintaining the system with extremely high reliability against sudden disasters. be able to.

(Other embodiments)
The present invention is not limited to the above embodiments. For example, in the first embodiment, the case where the area EB of B town is covered by one conversion device MS has been described as an example. However, when the area to be covered is large and cannot be covered by one conversion device MS, a plurality of conversion devices may be distributed to a plurality of slave stations belonging to the system of A town.

  Furthermore, in the first embodiment, the case where the conversion device MS is attached to the outdoor communication device FSAi has been described as an example. However, the present invention is not limited to this, and when a relay station exists, a conversion device may be attached to the relay station. In general, since the relay station is installed in a place with good visibility such as Yamagami, it is possible to cover a wide area with a single or a small number of converters by attaching the converter to the relay station.

  Furthermore, in the first embodiment, the case where the conversion device MS is attached to the existing slave station FSAi has been described as an example. However, the present invention is not limited to this, and an independent conversion device or a slave station or relay station incorporating the conversion device function may be manufactured, and these may be newly installed at appropriate positions in the area EA in the city A.

  In the first embodiment, the case where both the call signal determination function 22a and the signal transmission control function 22b are realized by executing an application program has been described as an example. However, all or part of these functions are implemented. You may comprise so that it may implement | achieve by hardware.

  In addition, the number of systems to be integrated, the number of installed conversion devices and their installation positions, configuration, conversion control procedure and control content, conversion table configuration, call signal format and type of data inserted into this call signal, etc. Various modifications can be made without departing from the scope of the present invention.

  In short, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering several different embodiment.

1 is a schematic configuration diagram showing an embodiment of an integrated broadcast communication system according to the present invention. The block diagram which shows the structure of the converter in the system shown in FIG. 1, and an outdoor type | mold communication apparatus. The figure which shows an example of the memory | storage data of the municipality code conversion table provided in the memory | storage part of the converter shown in FIG. The figure which shows an example of the memory | storage data of the sub_station | mobile_unit ID conversion table provided in the memory | storage part of the converter shown in FIG. The figure which shows an example of the relationship between the call signal before conversion, and the call signal after conversion. The flowchart which shows the conversion control procedure and control content by the conversion control part of the converter shown in FIG. The schematic block diagram which shows other embodiment of the integrated broadcast communication system concerning this invention.

Explanation of symbols

  EA ... A city area, EB ... B town area, BSA, BSC, BSD ... master station, FSA1 to FSAi, FSAi, FSB1 to FSBk, FSC1 to FSCn, FSD1 to FSDk ... outdoor communication device, GSA1 to GSAm , GSB1 to GSB1, GSC1 to GSCm, GSD1 to GSDl ... Indoor communication device (door-to-door receiver), MS, MSC, MSD ... Conversion device, HS ... Integrated console, 1 ... Console, 2 ... Master station radio Equipment: 11 ... Antenna of outdoor slave station, 12 ... Radio unit of outdoor slave station, 13 ... Slave station control unit, 14 ... Output interface, 15 ... Outdoor loudspeaker, 16 ... Input interface, 17 ... Microphone, 21 ... Slave station Interface, 22 ... Conversion control unit, 22a ... Call signal conversion function, 22b ... Signal transmission control function, 23 ... Storage unit, 23a ... Municipal code conversion table, 23b ... Child station code conversion table, 24 ... Conversion device Wireless unit of the device, 25 ... antenna of the conversion device, 26 ... maintenance interface.

Claims (3)

A master station provided in a first area and a plurality of first slave stations, wherein a first call signal and a notification signal are transmitted from the master station to the first slave station using a first radio frequency. A first system for transmitting;
A second system comprising a plurality of second slave stations arranged in a second area different from the first area and receiving a second call signal and a notification signal using a second radio frequency When,
A conversion device disposed in the first area,
The converter is
Means for receiving at a first radio frequency a first call signal and a notification signal transmitted from a master station of the first system;
Means for converting the received first paging signal into the second paging signal;
Means for transmitting the converted second call signal and the received notification signal to the plurality of second slave stations using the second radio frequency. Broadcast communication system.   The integrated broadcast communication system according to claim 1, wherein the conversion device is provided in any one of the first slave stations. When the first system further comprises a relay station that relays the first call signal and the notification signal between a master station and a plurality of first slave stations,
The integrated broadcast communication system according to claim 1, wherein the conversion device is provided in the relay station.

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