JP2005167850A - Data communication network converter and data communication network conversion method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that communication using mobile phones is not available in an under-populated area where an enough number of base stations for mobile phones are not installed, though possible communicating means even out of the service area are disclosed in an area which is fully equipped with base stations for mobile phones. <P>SOLUTION: A radio communication technique is applied to a bus location system which is already nearing practical use in a heavy traffic area. Data communication in the under-populated area having a non-sensitive area where radio wave of a base station for mobile phones (mobile base station 9) does not reach is made possible by a mobile station (bus 30) which can establish communication with mobile phones and radio communication, a relay server (10) of radio communication and a relay station (20). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a data communication network converter of a wireless communication system that enables wireless communication even in an area where a mobile phone base station cannot receive radio waves.

  In recent years, high-speed and high-quality data communication has been realized in a mobile phone terminal such as a mobile phone, and a technology applying mobile computing technology has been put into practical use. For example, data communication of a mobile phone is applied to a PDA mobile terminal or a car, and various information providing services are provided in addition to Internet mail and Internet Web. There is also an information provision service on a shared bus, which is a general public service. This information providing service is an operation information providing service using a bus location system that can inform a user waiting for a bus at a bus stop or the like due to traffic congestion. In addition, since the bus route covers a wide area, it is necessary to provide it across a wide service area, so that the mobile phone terminal can be used outside the service area of the registered mobile communication company, Other mobile telecommunications carriers covering areas outside the service area have been engaged in voice communication connection mediation and services for connecting to the Internet, so-called roaming.

  However, in order to ensure access security, it has been impossible to provide an information providing service provided only within the service area outside the service area. Therefore, a technique for connecting a mobile communication carrier outside the service area using a dedicated line as shown in Patent Document 1 and providing a service provided only within the service area outside the service area is disclosed.

  In addition, as shown in Patent Document 2, a signal received from a wireless base station in a public mode is converted into a private mode and relayed to a handset of a mobile phone terminal, and relayed to a private mode. A technology that enables communication between a radio and a radio base station is also disclosed. However, in a depopulated area where the population decline and the increase in the population ratio of the elderly are constant, there is a mobile phone insensitive area, and it is not possible to secure enough users. None of the above services are provided.

JP 2003-47055 A Japanese Patent Laid-Open No. 11-55752

  In this way, in areas where mobile phone base stations are fully equipped, means of communication are disclosed even outside the service area. However, if mobile phone base stations are not installed in depopulated areas, There is a problem that communication using a telephone cannot be used. Further, the method of relaying a mobile phone in a public mode and a private mode using a mobile phone or the like has a problem that a communication service area that covers a depopulated area cannot be secured.

  The present invention has been made for such a conventional problem, and is a data communication network converter of a wireless communication system that enables wireless communication even in an area where a radio wave of a mobile phone base station does not reach.

  In order to solve the above-described problems, the present invention provides a wireless communication network having a transmission rate different from that of a mobile communication network in order to perform data communication between a mobile station passing through an insensitive area of mobile communication and a fixed station of mobile communication. Data communication network converters that perform data conversion and data transmission, perform protocol conversion according to each protocol, convert data from data converters, data from wireless communication networks and mobile communication networks It is characterized by comprising a data accumulator for accumulating, a batch transmission means for transmitting the accumulated data in batches, and a real-time transmission means for transmitting highly urgent data in real time.

  The data communication network converter according to the present invention further comprises a relay server for connecting the mobile communication network and the wireless communication network, and a relay station for expanding the service area of the wireless communication network as necessary. And

  Furthermore, in the data communication network converter according to the present invention, the data accumulator accumulates position information from the GPS positioning device possessed by the mobile station and status information of the mobile station, and is necessary among the accumulated data. The data is transmitted by the batch transmission means.

  Furthermore, in the data communication network converter according to the present invention, the data accumulator temporarily stores information from the fixed station and transmits the information to the mobile station by the real-time transmission means.

  The present invention performs data conversion and data transmission by a mobile communication network and a wireless communication network having a transmission rate different from that of a mobile communication network in order to perform data communication between a mobile station passing through a mobile communication insensitive area and a mobile communication fixed station. In the data communication network conversion method to be performed, a data conversion step for converting the protocol according to each protocol and converting the data, a data storage step for storing data from the wireless communication network and the mobile communication network, and the stored data Are transmitted to the fixed station in batches, and a real-time transmission step of transmitting highly urgent data in real time.

  Further, in the data communication network conversion method according to the present invention, the data storage step stores the position information from the GPS positioning device of the mobile station and the status information of the mobile station, and is necessary among the stored data. Data is transmitted by the batch transmission step.

  Furthermore, in the data communication network conversion method according to the present invention, the data accumulation step temporarily stores information from the fixed station and transmits the information to the mobile station by the real-time transmission step.

  In the present invention, a mobile station that passes through a mobile communication insensitive area and a fixed station for mobile communication are connected to each other by connecting a wireless communication network having different transmission speeds to the mobile communication network to perform data conversion and data transfer. In a data communication network conversion system including a data communication network converter that performs transmission and the mobile station that communicates with a wireless communication network, the mobile station includes a mobile communication device that communicates with a mobile communication network, and a mobile object. A radio that communicates with a wireless communication network installed in a communication insensitive area, a GPS positioning device for measuring the current position, and a mobile communication network from the current position and pre-stored map information of a communicable area And a switching means for switching a radio communication network.

  The present invention is applied as a wireless communication technology of a bus location system that has already been put into practical use in a traffic-congested area, and in a depopulated area having a dead area where the radio wave of the mobile phone base station does not reach, it is moved with the mobile phone base station by a relay server. There is an effect of enabling communication with a station.

  Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

1. Overall Configuration FIG. 1 is an overall system configuration diagram showing the overall system configuration of a wireless communication system according to a first embodiment of the present invention. The overall configuration will be described with reference to FIG. In the first embodiment, the area indicated by the dotted line is the mobile phone service area 41, the mobile base station 9 that provides the service is installed at the center, and the management station 40 of the bus location system that communicates with the mobile base station 9 and the mobile phone There is a relay server 10 that connects a telephone communication network and a private wireless communication network and converts data. In the mobile phone service area 41, the mobile base station 9 and the mobile phones (1a, 1c) can communicate with each other. In the private wireless communication service area 42, the mobile phone communication network converted by the relay server 10 is used. Data communication. Furthermore, there is a relay station 20 for extending the private wireless communication network.

  Next, each configuration of the management station 40, the relay server 10, the relay station 20, and the bus 30 will be described. The management station 40 has a communication PC 8 for packet data communication (hereinafter referred to as data communication) connected to the mobile phone network 16, and performs data communication from the communication PC 8 to the bus 30 moving in the mobile phone dead zone. A transmission wave transmitted from the antenna of the mobile base station 9 through the mobile phone network 16 connected to the communication PC 8 and a dedicated line (not shown) is received by the antenna 7a of the mobile phone 1a of the relay server 10 and converted by the mobile phone 1a. The data is input to the controller 2 of the relay server 10.

  The controller 2 of the relay server 10 converts the data from the mobile phone 1a into a self-supported wireless communication protocol and sends it to the wireless device 3a. The wireless device 3a transmits the transmission wave from the antenna 6a to the relay station 20 or the bus 30. The transmitted transmission wave is received by the antenna 6 b of the relay station 20, and the received transmission wave is converted into data by the wireless device 3 b and sent from the wireless device 3 b to the controller 21. Further, the controller 21 transmits a transmission wave to the bus 30 moving in the private wireless communication service area in the area in charge of the relay station 20 via the wireless device 3b and the antenna 6b '.

  The bus 30 includes a GPS positioning device 5 for acquiring a current position, an antenna 6c and a wireless device 3c for private wireless communication, an antenna 7c and a mobile phone 1c for communicating while moving in a mobile phone communication service area. , An input / output terminal 32 for displaying information such as operation status input and boarding reservation information display, and a controller 31 for controlling them.

  FIG. 2 is a schematic configuration diagram of a bus location system using a mobile phone service that moves between a mobile phone service area and a mobile phone insensitive area according to the first embodiment of the present invention. A wireless system in the bus location system will be described with reference to FIG.

  The bus 30a is operated on an operation route that moves from the mobile phone insensitive area A to the mobile phone insensitive area B from the management station 40 where the bus center is located, and returns to the management station 40. The management station 40 manages the bus operation, receives the current position information from the bus 30a, the operation status, and the like by mobile phone data communication, and transmits boarding reservations, operation commands, etc. to the bus 30a. If the bus 30a is moving in the mobile phone service area, data can be transmitted / received by mobile phone data communication. However, on the route beyond the relay server (10a, 10b) of the private wireless communication network, it becomes a mobile phone insensitive area. . In this area, the cellular phone data communication is converted by the relay server (10a, 10b), and the bus (30a, 30b) is switched to the private wireless communication to transmit / receive data.

  Further, when the bus 30a moves from the mobile phone insensitive area A to the mobile phone service area, the bus 30a switches to mobile phone data communication and transmits / receives data. Further, when moving to the mobile phone insensitive area B, the bus 30b switches to the self-operated wireless communication. At first, the relay server 10b relays, but when the bus 30b further moves and enters the mobile phone insensitive area B. Data is transmitted / received via the relay station 20b and the relay server 10b.

  FIG. 3 is a configuration diagram showing the configuration of the relay server 10 that converts the mobile phone service into the private wireless communication service in the first embodiment of the present invention. The relay server 10 is installed on a utility pole, a disaster prevention radio tower, or the like with good visibility on a bus route. In such a place, the radio wave transmission environment is good and it is easy to secure the power supply. Further, the relay server 10 includes a mobile phone 1 for mobile communication, a wireless device 3 for private wireless communication, and a communication controller 17 for a relay server for controlling them. The antenna 7 of the mobile phone 1 is a telephone pole 15. Installed at a high position and connected to the mobile phone 1. The mobile phone 1 is connected to the computer 11 via the interface 13, and the antenna 6 of the wireless device 3 for private wireless communication is similarly installed at a high position of the utility pole 15 and connected to the wireless device 3. The wireless device 3 is connected to the computer 11 via the 2400 bps modem 12. The computer 11 is connected to the database 4 for recording communication contents, and can also record contents transmitted / received by wireless communication and contents transmitted / received by a mobile phone. The computer 11 controls the relay server 10. Further, the power supply 14 of these devices is supplied from a power line.

  FIG. 4 is a configuration diagram showing the configuration of the relay station 20 for expanding the private wireless communication service area in the first embodiment of the present invention. The relay station 20 is used when a service area cannot be secured by the relay server 10 alone, and is configured of a wireless device 3 and a communication controller 18 for wireless communication. The relay station 20 relays self-contained wireless communication, and has a configuration of the wireless device 3, the wireless device antenna 6, the 2400 bps modem 12, and the computer 11. The antenna 6 and the wireless device 3 are connected, the wireless device 3 is connected to a 2400 bps modem 12 for data conversion, and the 2400 bps modem 12 and the computer 11 are further connected. Similarly, the power supply 14 of these devices is supplied from a power line.

2. Data Transmission / Reception Next, the data communication speed of cellular phone data communication will be described. Mobile phone data communication is provided by trademarks such as DoPa (registered trademark of NTT DoCoMo) and CPA (registered trademark of KDDI), and the service area is almost the same as the call area of mobile phones. By using this line network, a general TCP / IP connection can be used between the bus 30 and the management station 40 as a dedicated LAN (intranet). The communication speed is 9600 bps or 28,800 bps in the DoCoMo DoPa network, and 9600 bps in the KDDI CPA network or the maximum uplink 64 kbps / downlink 144 kbps.

  The amount of data from the bus 30 to the management station 40 is suppressed to about 80 bits, but in actual communication, an error correction code is added to this, so the data length is further increased to about 160 bits. Further, the amount of data from the management station 40 to the bus 30 is about 40 bits, and since an error correction code is added, it becomes about 120 bits when a synchronization signal is added.

  In general, a bus location system using cellular phone data communication transmits data with a minimum amount of data necessary to suppress a communication charge and with as much interval as possible. In the management station 40, the position is corrected by a prediction technique based on the traveling state of the bus 30, and the bus 30 transmits data every bus stop or every minute. Of course, the communication interval may be narrowed every 30 seconds according to the moving distance, or the interval may be widened every 2 minutes.

2.1 Data transmission rate of private wireless communication network The wireless communication data transmission method used in private wireless communication uses the MSK method and has a data transfer rate of 2,400 bps. However, the effective speed is about 1,000 bps due to error correction or the like. As described above, the communication speed is different between the section of the cellular phone communication network and the section of the private wireless communication network, and the disparity is at least four times and at most about 55 times. The priority of the data is determined, and the data that needs to be transmitted in real time and the data that can be transmitted in batches are transmitted in the idle time such as when the bus is parked waiting for a signal.

2.2 Relay Server and Relay Station The relay server 10 is in the data communication service area of the mobile phone communication network, and the relay station 20 is installed outside the mobile phone service. Since the radio wave used for the relay has a higher linearity as the frequency is higher, a band (150 MHz) lower than a band with a higher frequency (380 MHz) was used in a place where the topography is complicated. In addition, the relay server 10 and the relay station 20 are installed along the road along which the radio station can be easily installed and the power supply can be easily secured. In addition, the relay station 20 has a function of mutual conversion from a cellular phone communication protocol to a private wireless communication protocol.

  Next, the flow of data relay processing will be described. There are two types of communication operations. One is a polling operation and a downlink message transmission operation. Each relay station 20 centering on the relay server 10 has its own station ID, group number ID, and the like. Note that communication from the relay server 10 to the relay station 20 and the bus 30 is in the downlink direction, and communication from the bus 30 or the relay station 20 to the relay server 10 is in the uplink direction.

(1) Polling Operation FIG. 9 is a schematic diagram showing a flow of polling operation for private wireless communication in the first embodiment of the present invention. First, the polling operation will be described. The polling operation is an operation in which a synchronization signal is sequentially transmitted from the relay server 10 to the relay station 20 and the bus 30 using time slots, and information is received as a response to the polling operation.

(I) Transmission operation of synchronization signal When the synchronization signal is transmitted from the relay server 10 and the relay station 20 receives the synchronization signal from a predetermined upper station, the relay station 20 transfers it to the lower station. Each relay station 20 stores how many relay stations 20 exist below its own station, and waits for a time for the lower station to transfer the synchronization signal. At the timing when the lowest relay station 20 completes transmission of the synchronization signal, the relay server 10 and each relay station 20 wait for a response from the bus 30.

(Ii) Response operation from the bus When the bus 30 receives the synchronization signal from the relay server 10 and each relay station 20, the lowest relay station is synchronized by the relay station ID and the group number ID included in the synchronization signal. The timing for completing the signal transmission is obtained. A response signal is transmitted in the time slot of the ID number of the own station with reference to the obtained timing. The received relay station 20 transmits the response signal and the relay signal from the bus 30 to the upper station, and the signal relayed by each relay station 20 is transmitted to the relay server 10. The relay server 10 determines whether it is a polling target vehicle (bus 30) from the received information. In the case of the target vehicle, if it is data to be reported in real time, the data is sent to the management station 40 via the mobile phone network 16. In response, other data is recorded in the database 4 and responds in response to a request from the management station 40.

(2) Downlink Message Transmission Operation FIG. 10 is a schematic diagram showing the flow of the downlink message transmission operation of private wireless communication in the first embodiment of the present invention. The downlink message transmission operation is a transmission operation performed when data cannot be transmitted within a limited time frame. Normally, transmission is performed within a time frame that can be transmitted by the bus 30, but in the downlink message operation, the transmission partner is set first, and the relay station 20 and the relay server 10 communicate with only the specific bus 30.

3. Flow of Relay Process There are roughly four relay processes of the relay server 10, including (1) relay start process (2) operation status transmission process (3) boarding reservation transmission process (4) relay end process. The relay process will be described below.

3.1 Relay Start Process FIG. 5 shows each of the management station 40, the relay server 10, and the bus 30 in the relay start process when moving from the mobile phone service area to the private wireless communication service area in the first embodiment of the present invention. It is a flowchart which shows the flow of a process. In this process, the fact that the bus 30 has entered the mobile phone service area and the private wireless communication service area is switched by comparing the position information by the GPS positioning device 5 with the switching position information stored in the controller 31 in advance. It relates to processing.

  First, the current position is acquired from the GPS positioning device 5 in order to confirm the position of the bus 30 in step S1. Next, in step S2, the current location information, the map information stored in the memory (not shown) of the controller 21, the mobile phone communication service area, and the service area information of private wireless communication are used in two service providing areas. If it is determined that there is a predetermined switching position, communication is started in the time slot determined for each bus 30 in step S3 and a connection request to the private wireless communication network is transmitted to the relay server. 10 to request.

  The relay server 10 that has received the connection request in step S7 first stores the wireless ID, route ID, bus identification ID, and the like of the bus 30 (not shown), and receives the connection request in step S7. Next, relaying is started in step S8. In step S9, the wireless status (step S4), current position (step S5), boarding record (step S6), etc. sent from the bus 30 periodically are recorded. Then, in step S 10, a “relay start” is transmitted to the management station 40 for notifying that the mobile phone data transmission addressed to the bus 30 will be transmitted to the relay server 10 from the relay connection request of the bus 30 in the future. In step S11, the management station 40 recognizes that the mobile phone communication on the bus 30 by the relay server 10 has been relayed by private wireless communication, and stores that subsequent communication is transmitted to the relay server 10.

3.2 Operation Status Transmission Processing FIG. 6 shows the management station 40 and relay in the operation status transmission processing for transmitting the operation status to the management station 40 from the bus at the time of moving to the private wireless communication service area in the first embodiment of the present invention. 4 is a flowchart showing a flow of each process of the server 10 (including the relay station 20) and the bus 30. This process relates to a process of transmitting information on the bus 30 to the management station 40 while the bus 30 is moving in the private wireless communication service area. Since the data transmission speeds of the private wireless communication network and the mobile phone communication network are different as described above, the relay server 10 usually responds by reading from the management station 40, but it is urgent and real-time. In this process, data to be transmitted is determined from a priority table (not shown) and transmitted. The operation status transmission from the bus 30 as a real-time report will be described with reference to FIG.

  Steps S21 to S23 are periodic processes. In step S21, the position information of the bus 30 is acquired from the GPS positioning device 5, and the current position, the map stored in advance, and the radio to be selected from the service area information of the mobile phone and the private wireless communication are determined. In step S22, the information is transmitted to the relay server 10 in the same manner. In step S23, the information on the passengers on the bus is transmitted to the relay server 10 as a boarding record. The relay server 10 records the information in the database 4 in step S25. Thereafter, in step S24, the bus 30 transmits the operation status “vehicle failure” from the bus to the relay server in order to transmit that the vehicle failure has occurred to the management station 40. In step S26, the relay server 10 receives the operation status, determines that it is a predetermined real-time transmission item, and transmits the operation status “vehicle failure” to the management station in step S27. Next, in order for the management station 40 to receive the operation status “vehicle failure” transmitted in step S29 and call the current position of the bus 30 and boarding records, the information recorded by the relay server 10 in step S30 is recorded. In step S28, the relay server 10 acquires bus information. This is the end of the operation status transmission process.

3.3 Boarding reservation transmission processing FIG. 7 shows the management station 40 in the boarding reservation transmission processing for transmitting a boarding reservation from the management station 40 to the bus 30 when traveling in the private wireless communication service area according to the first embodiment of the present invention. 4 is a flowchart showing the flow of each process of the relay server 10 and the bus 30. This process is a boarding reservation process in which information for reserving a boarding is transmitted from the management station 40 to the bus 30 at the stop. First, the management station 40 confirms the position of the relay server 10 in step S39 in order to confirm the status of the bus 30, and acquires necessary information from the database in step S36. The information read at this time is information transmitted by the bus 30 to the relay server by executing the processing from step S31 to step 33. The information is the current position and radio selection determination (step S31) by the GPS positioning device 5 and the measured current position is transmitted to the relay server (step S32). Next, in step S40, "ride reservation" is transmitted to the bus. When the relay server 10 receives this “boarding reservation”, it determines that it is a predetermined real-time transmission item in step S 37, and transmits the “boarding reservation” to the bus 30. The bus 30 receives the transmitted “reservation reservation”, and displays “reservation reservation” on the input / output terminal in step S34. The boarding reservation process is thus completed.

3.4 Relay End Process FIG. 8 shows the management station 40 and relay server 10 (also the relay station 20 in the relay end process) when moving from the private wireless communication service area to the mobile phone service area in the first embodiment of the present invention. 2 is a flowchart showing the flow of each process of the bus 30. This process illuminates the position information obtained by the GPS positioning device 5 and the switching position information stored in advance in the controller 31 that the bus 30 has entered the service area that also receives mobile phone data communication from the private wireless communication service area. In addition, the present invention relates to switching processing for switching from self-operated wireless communication to mobile phone communication.

  Normally, the management station 40 acquires the current position, boarding status, etc. of the bus 30 to the relay server 10 about every 3 minutes, but the bus 30 moves and the position information by the GPS positioning device 5 and the controller 31 are acquired. In step S41, the current position is transmitted to the relay server 10 in step S42, and the boarding record is transmitted in step S43. The transmitted information is stored in the database 4 of the relay server 10 in step S46. The bus 30 further transmits a disconnection request for private wireless communication to the relay server 10 in step S44.

  In step S47, the relay server 10 receives the transmitted disconnection request, and the relay server 10 ends the relay processing in step S48, and the relay station 10 sends a “relay end” notification that ends the relay in step S49. Send to. The management station 40 receives the transmitted relay end, executes the last data read in step S53, reads the necessary data in step S50 to acquire the database information of the relay server 10, and ends the service of the private wireless communication network Then, normal cellular phone data communication is resumed. Thereafter, the bus 30 performs data communication every minute using cellular phone communication. The above is the flow of relay processing in the first embodiment. In this embodiment, the information on the bus 30 stored in the relay server 10 is periodically read from the management station 40. However, even if the relay server 10 periodically transmits the information to the management station 40, the control is preferably performed. Needless to say.

4). Other Information Providing Service Using Data Communication Network Converter In the first embodiment of the present invention, the information providing service for making a boarding reservation for the moving bus 30 has been described, but the first embodiment is applied. A second embodiment of the information providing service will be described below.

4.1 Bus location information provision service In a depopulated area where the number of buses 30 is small and the interval between flights is long, it is necessary to wait at a bus stop early so that the bus 30 is not missed. By providing information by using a computer connected to the Internet by providing Web information on the current location of the bus 30 acquired by the management station 40, even under hot summer weather, snowfall in winter, and other bad weather conditions, Without waiting for a long time at the bus stop, it becomes possible to wait in the waiting room of a house, a store, a hospital, etc. with peace of mind until the bus arrives just before.

4.2 Bus getting-on / off information notification service This service notifies a designated e-mail address that kindergarteners and elderly people got on and off the bus 30. Since it is possible to check at any time whether kindergarteners and elderly people get on and off the bus at their destination, it is possible to deliver peace of mind to their families. Also, when you leave for the bus stop, you can meet without delay if you use the “bus location information service” bus approach notification. In addition, as an application of this service, it is also possible to provide a service for notifying a recipient of a small quantity cargo when a small quantity of cargo is transported using the bus 30.

4.3 Reception service such as hospital consultation from the bus Persons far away from the hospital will be delayed in the reception order even if they visit the first bus in the morning. However, it will be improved if the "hospital consultation reception service" from the bus 30 enables the reception procedure in the hospital reservation system in cooperation with the bus.

4.4 Various information transmission services between the bus and the operation management office When an emergency situation occurs on the bus 30, the crew can notify the management station 40 that manages the operation by pressing the “emergency button”. Thus, the safety of passengers and passengers can be ensured. Furthermore, if a plurality of buttons are prepared and various information such as a delay of the bus 30 and an accident are transmitted, the bus user can be provided with accurate bus 30 operation information. Furthermore, in the demand bus operated by the operation request, when there is a demand request from the user of the bus 30, this system can be used to respond by contacting the crew of the bus 30 from the management station 40.

1 is an overall system configuration diagram illustrating a schematic system configuration of an entire wireless communication system according to a first embodiment of the present invention. 1 is a schematic configuration diagram of a bus location system using a mobile phone service that moves between a mobile phone service area and a mobile phone insensitive area in the first embodiment of the present invention. It is a block diagram which shows the structure of the relay server which converts the mobile telephone service in the 1st Embodiment of this invention into a private wireless communication service. It is a block diagram which shows the structure of the relay station for expanding the private radio communication service area in the 1st Embodiment of this invention. 5 is a flowchart showing the flow of each process of a management station, a relay server, and a bus in a relay start process when moving from a mobile phone service area to a private wireless communication service area in the first embodiment of the present invention. It is a flowchart which shows the flow of each process of a management station, a relay server, and a bus | bath in the operation condition transmission process which transmits an operation condition to the management station from the bus | bath at the time of the private wireless communication service area movement in the 1st Embodiment of this invention. It is a flowchart which shows the flow of each process of a management station, a relay server, and a bus | bath in the boarding reservation transmission process which transmits the reservation of boarding to the bus from the management station at the time of the self-operated wireless communication service area movement in the 1st Embodiment of this invention. . 6 is a flowchart showing the flow of each process of the management station, the relay server, and the bus in the relay end process when moving from the private wireless communication service area to the mobile phone service area in the first embodiment of the present invention. It is the schematic diagram which showed the flow of the polling operation | movement of the private wireless communication in the 1st Embodiment of this invention. It is the schematic diagram which showed the flow of the downlink message transmission operation | movement of the private wireless communication in the 1st Embodiment of this invention.

Explanation of symbols

  1 mobile phone, 2 controller, 3 radio, 4 database, 5 GPS positioning device, 6 radio antenna, 7 mobile phone antenna, 8 communication PC, 9 mobile base station, 10 relay server, 11 computer, 12 modem , 13 interface, 14 power supply, 15 utility pole, 16 mobile phone network, 17, 18 communication controller, 20 relay station, 21 controller, 30 bus, 31 controller, 32 input / output terminal, 40 management station, 41 mobile phone service Region, 42 Private wireless communication service region.

Claims (8)

Data communication for data conversion and data transmission by connecting a wireless communication network with different transmission speeds to a mobile communication network so that a mobile station passing through a mobile communication insensitive area and a fixed station for mobile communication communicate with each other. In the network converter,
A data converter that converts the protocol according to each protocol and converts the data,
A data accumulator for accumulating data from the wireless communication network and the mobile communication network;
Batch transmission means for transmitting the accumulated data in batches;
Real-time transmission means to transmit highly urgent data in real time,
A data communication network converter characterized by comprising: The data communication network converter according to claim 1,
A relay server connecting the mobile communication network and the wireless communication network;
A relay station for expanding the service area of the wireless communication network if necessary;
A data communication network converter characterized by comprising: In the data communication network converter according to claim 1 or 2,
The data accumulator accumulates position information from the GPS positioning device of the mobile station and status information of the mobile station, and transmits necessary data among the accumulated data by the batch transmission means. Data communication network converter. The data communication network converter according to any one of claims 1 to 3,
The data storage network converter, wherein the data accumulator temporarily stores information from the fixed station and transmits the information to the mobile station by the real-time transmission means. A data communication network that performs data conversion and data transmission between a mobile communication network and a wireless communication network having a transmission rate different from that of a mobile communication network in order to perform data communication between a mobile station passing through a mobile communication insensitive area and a mobile communication fixed station. In the conversion method,
A data conversion process for converting data according to each protocol and converting the data,
A data storage process for storing data from the wireless communication network and the mobile communication network;
A batch transmission step of batch-transmitting the accumulated data to the fixed station;
Real-time transmission process to transmit highly urgent data in real time,
A data communication network conversion method comprising: In the data communication network conversion method according to claim 5,
The data storage step stores position information from a GPS positioning device of the mobile station and state information of the mobile station, and transmits necessary data among the stored data through the batch transmission step. Data communication network conversion method. In the data communication network conversion method according to claim 5 or 6,
In the data storage network conversion method, the data storage step temporarily stores information from the fixed station and transmits the information to the mobile station by the real-time transmission step. Data for data conversion and data transmission by connecting a wireless communication network of different transmission speed to the mobile communication network for data communication between a mobile station passing through a mobile communication insensitive area and a fixed station for mobile communication In a data communication network conversion system including a communication network converter and the mobile station communicating with a wireless communication network,
The mobile station includes a mobile communication device that communicates with a mobile communication network;
A wireless device that communicates with a wireless communication network installed in a mobile communication insensitive area;
GPS positioning device to measure the current position,
Switching means for switching between the mobile communication network and the wireless communication network from the current position and the map information of the communicable area stored in advance,
A data communication network conversion system comprising the mobile station including:

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