JP2001218251A - Forward base selection method and forward base selection system during wireless response - Google Patents

Abstract

(57) Abstract: A forward base selection method and a forward base selection system for selecting a forward base station by utilizing mobile station reception data to which GPS data has been added and forward base station map data capable of optimal reception. Aim for the proposal. A mobile station system transmits mobile station data such as a vehicle ID and latitude / longitude data by wireless transmitting / receiving means, and a plurality of forward base station systems receive the mobile station data and establish a dedicated line. The headquarters system 3 receives mobile station data from one or a plurality of forward base station systems 2 in parallel, and the data separating means 33 extracts vehicle ID data and longitude / latitude data from the received data. And the vehicle position calculating means 34
Calculates and outputs the current position data from the latitude and longitude data, and the base station selecting means 35 selects a forward base station capable of optimal reception based on the current position and the map data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AVM system for communicating voice and data with a large number of mobile stations (vehicles) via a plurality of forward base station systems, and a forward response in a wireless response of a wide area wireless system. The present invention relates to a base selection method, and more particularly, to a forward base selection method and a forward base selection system for selecting a forward base station using a forward base station map capable of optimal reception.

[0002]

2. Description of the Related Art A wide-area communication system according to the prior art is:
As shown in a part of the schematic configuration diagram of the forward base selection system at the time of wireless response of the present invention shown in FIG.
2 and C3, and relays wireless communication between the mobile station system and the base station antennas 20, 20 ',
20 ″, a plurality of forward base station systems 2, a dedicated line 5 for communication connection between the forward base station systems 2 and the headquarters, a mobile station system 1 via the forward base station system 2, voice and data, etc. It is composed of a headquarters system 3 and the like that perform communication of a plurality of GPSs shown in FIG.
Some functions of the mobile station system and some functions of the headquarters system are not included. The operation will be described using a distribution map of mobile stations and forward base stations according to the conventional technique shown in FIG.
FIG. 6 shows a plurality of vehicles C1, C equipped with a mobile station system.
2, C3,... And the distribution of the base station antennas 20A, 20B, 20C of the forward base station system 2 are displayed on a map. In this figure, the zone where each base station antenna can transmit and receive is the range of the ellipses Z1, Z2 and Z3. The shaded portion indicates an area where the vehicle can operate (airy).

[0005] It means that the zone in which the forward base station antenna 20A can transmit and receive is Z1, the zone in which the forward base station antenna 20B can transmit and receive is Z2, and the zone in which the forward base station antenna 20C can transmit and receive is Z3. on the other hand,
The vehicle C1 belongs to any of the zones Z1, Z2, and Z3 and can communicate with three forward base stations simultaneously. Vehicle C2 is Z
It belongs to both zones 1 and Z3 and can communicate with two forward base stations simultaneously. The vehicle C3 belongs to only the zone Z2 and can communicate with only one forward base station. When the vehicle C3 transmits the communication data to which the vehicle ID is added, the communication data is received only by the forward base station antenna 20B and is relayed and transmitted to the headquarters system 3 via the dedicated line 5. When the reception is completed, the headquarters system 3 sends a message indicating the completion of the reception to the corresponding vehicle C3 from the forward base station antenna 20B via the dedicated line 5. When the vehicle C1 transmits the communication data to which the vehicle ID is added, the communication data is simultaneously received by three forward base stations having the forward base station antennas 20A, 20B, and 20C. The received data is simultaneously relay-transmitted to the headquarters system 3 via the dedicated line 5. The headquarters system 3 sequentially stores the three reception data in the reception data storage means corresponding to each of the forward base stations, and sequentially performs the reception completion process stepwise for each of the three forward base stations (in the order of 20A, 20B, and 20C). Do) For this reason, a message of completion of reception is transmitted three times to the same vehicle C1, which requires a long radio occupation time. During this time, reception from other mobile stations is not possible, and a wide area having a large number of forward base station systems is not available. There is a problem that smooth wireless communication of the communication system is hindered.

[0004]

SUMMARY OF THE INVENTION In view of the above-described problems, the present invention relates to a wide-area wireless system for communicating voice and data with a large number of mobile stations via a plurality of forward base station systems. In the forward base selection method at the time of wireless response, the forward base selection method and forward base selection for selecting the forward base station using the mobile station reception data added with the GPS data and the map data of the forward base station capable of optimal reception The aim is to propose a system.

[0005]

SUMMARY OF THE INVENTION A mobile station system for a large number of vehicles operating in a wide area, a plurality of forward base station systems for relaying wireless communication with the mobile station system, and a plurality of forward base station systems. An AVM system or a base station for wireless response of a wide-area wireless system, comprising a dedicated line for communication connection with the headquarters and a headquarters system for communicating with a mobile station system via a forward base station system such as voice and data. In the selection method, a wireless transmission / reception means for performing wireless communication of voice, data, and the like with a forward base station system, a GPS unit for receiving signals from a plurality of GPS and calculating and outputting longitude and latitude data, and storing a vehicle ID of the vehicle I / F that interfaces with a handset that performs input and output of voice communication with the data storage unit that is being operated, an operation terminal that operates the device, and the like.
A mobile station system having an extended function unit comprising F means, a base station antenna for wirelessly transmitting / receiving a forward base, a wireless transmitting / receiving means for wirelessly transmitting / receiving to / from the mobile station system via the base station antenna, and a dedicated line Forward base station system having line transmitting / receiving means for connecting to a headquarters system via a communication line, communication I / F means for communicating I / F with a dedicated line, and communication control means for controlling communication with the forward base station system Data separating means for separating vehicle ID data and longitude / latitude data from data received from the forward base station system, vehicle position calculating means for calculating and outputting vehicle position data from the longitude / latitude data, and Base station selecting means for selecting a forward base station capable of optimally receiving a radio signal from a mobile station system; With the headquarters system having a data storage means for storing map data and the like of the base station,
The mobile station system receives signals from a plurality of GPSs, computes and outputs longitude and latitude data, and transmits mobile station data such as a vehicle ID and longitude and latitude data by wireless transmission / reception means to receive a plurality of mobile station data. The forward base station system receives the mobile station data and relays it to the headquarters system via a dedicated line, and the headquarters system receives the mobile station data relayed from one or more forward base station systems in parallel, The data storage means temporarily stores the data as reception data, the data separation means separates vehicle ID data and longitude / latitude data from the reception data, the vehicle position calculation means calculates and outputs the current position data of the vehicle from the longitude / latitude data, The station selection means selects a forward base station capable of optimal reception based on the current position data and the map data.

[0006] A combination table of the forward base station and the latitude and longitude data capable of optimal reception, wherein the map data stored in the data storage means is in an area data format divided into a plurality of communication areas capable of receiving the base station data. And a map in a polygon data format combining the forward base station and latitude and longitude data capable of optimal reception, or critical map data combining a forward base station capable of optimal reception and a real map. I do.

The data storage means additionally stores a table of areas and advance base stations capable of optimal reception.

The communication control means is additionally provided with a reception data error check means for detecting a reception data error due to interference or radio wave transmission failure, and a retransmission command means for issuing a retransmission command to the mobile station system. Added a function to send a retransmission command to the mobile station system when the error check means detects a reception data error, and to send a reception completion information to the mobile station system when reception is completed without detecting an error in the reception data. Install, add the function to send the next transmission command to the mobile station system after the reception of the received data is completed, and install the polling format transmission command to all the mobile station systems in the receivable area. Add a polling transmission command function, or
An area data transmission function for transmitting the area-divided map data stored in the data storage means to the mobile station system is additionally installed.

In the base station selecting means, the same reception data discriminating function for discriminating the reception data at the same mobile station (same vehicle) and at the same time is additionally installed, or the same reception data stored in the data storage means is checked. Among them, a function to delete received data from other than the forward base station capable of optimal reception is additionally installed.

The dedicated line is a public line such as a telephone or ISDN, a wireless communication unit such as UHF or microwave, or an optical communication unit using an optical cable.

A mobile station system for a large number of vehicles that performs communication operation in a wide area, a plurality of forward base station systems for relaying wireless communication with the mobile station system, and a plurality of forward base station systems and a headquarters for communication connection. Advancing base selection system for wireless response, such as AVM system or wide area wireless system, consisting of a dedicated line and a headquarters system that communicates voice and data with the mobile station system via the advancing base station system. A wireless transmitting / receiving unit having a wireless transmitting / receiving unit and a vehicle antenna for performing wireless communication of voice and data with the base station system, a GPS antenna for receiving GPS signals from a plurality of GPSs, and demodulating GPS data from the received GPS signals It has a GPS receiver and a latitude and longitude calculator that calculates and outputs latitude and longitude data of the current position of the vehicle from the GPS data. GPS unit and vehicle ID of vehicle
Communication that controls communication between a data storage means having a vehicle ID memory that stores the data, a handset that performs input / output of voice communication, an operation terminal that operates an apparatus, and the like, an I / F means that performs I / F and a wireless transmission / reception means A mobile station system having an extended function unit or the like constituted by communication control means having a control unit; a base station antenna for wirelessly transmitting / receiving a forward base; and a radio for wirelessly transmitting / receiving to / from the mobile station system via the base station antenna A communication base station system having transmission / reception means, a line transmission / reception means for connecting to a headquarters system via a dedicated line, and a communication I / O unit having a plurality of line transmission / reception units for communicating with a plurality of forward base station systems via a dedicated line / F means, a communication control unit having a communication control unit for controlling communication with the forward base station system, and a reception completion transmitting unit for transmitting completion of reception A vehicle ID data separating unit for separating vehicle ID data from received data from the forward base station system, a latitude / longitude data separating unit for separating latitude / longitude data, and a voice data separating / superimposing unit for separating and superimposing voice data. , A vehicle position calculating unit having a vehicle position calculating unit for calculating and outputting vehicle position data from longitude and latitude data, an area determining unit for determining an area where a vehicle is located based on the vehicle position data, and a mobile station system Base station selecting means having a base station selecting section for selecting a forward base station capable of optimal reception of a radio signal from a receiving data memory for storing received data and map data of the forward base station capable of optimal reception And a headquarters system having data storage means having a map data memory for storage.

The GPS unit has a map data memory for storing map data, a display image generator for generating a display image based on the map data and the latitude and longitude data, and an area division for the data storage means of the extended function unit. A map additional information memory that stores data and map additional information such as a vehicle ID is additionally installed.

[0013] A retransmission determination unit for determining a retransmission command and performing retransmission control is additionally installed in the extended function unit.
Alternatively, a transmission permission requesting unit for requesting transmission permission via the forward base station system and a transmission permission determining unit for receiving transmission permission from the headquarters system and performing transmission control determination are additionally provided.

[0014] An area data for transmitting area division map data stored in data storage means to the mobile station system, in which a reception data error check unit for performing error check of reception data is additionally installed in the communication control means of the headquarters system. Add a transmission unit, add a retransmission command unit that sends a retransmission command when an error occurs in received data, and issue a polling type transmission command to all mobile station systems in the receivable area A polling command unit is additionally provided, or an area data transmitting unit for transmitting the area division map data stored in the data storage unit is additionally provided in the mobile station system.

An area division map data memory storing and registering an area division map divided into communication areas capable of receiving base station data is additionally installed in the data storage means of the headquarters system. A polygon data memory that stores and registers polygon data that combines advance base stations capable of optimal reception and latitude and longitude data is additionally installed. Addition of a critical map memory storing and registering a critical map combining an advance base station capable of optimal reception and an actual map, or a table of areas and advance base stations capable of optimal reception Is additionally installed.

In the communication control means of the headquarters system, a movement prediction calculation unit for predicting and calculating the future position of the vehicle moving near the boundary of the area is additionally installed.

In the base station selecting means of the headquarters system, an identical reception data discriminating unit for identifying reception data at the same mobile station (same vehicle) and at the same time is additionally installed, or
A reception data erasure unit for erasing reception data from other than the forward base station capable of optimal reception among the same reception data stored in the data storage means is additionally installed.

[0018]

FIG. 1 is a schematic system configuration diagram of an embodiment of a forward base selection system at the time of wireless response according to the present invention. FIG. 2 is a block diagram of a main part of an embodiment of the headquarters system according to the present invention. FIG. 3 is a block diagram of a main part of an embodiment of the mobile station system according to the present invention. The configuration of the forward base selection system and the operation of the forward base selection method at the time of wireless response according to the present invention will be schematically described with reference to FIG. The forward base selection system at the time of wireless response according to the embodiment includes a wireless transmitting / receiving means 12 for performing wireless communication such as voice and data with the forward base station system 2, and receives signals from a plurality of GPSs G 1, G 2, and G 3, GPS unit 11, which computes and outputs vehicle C1, C2, C3. . . And a handset for inputting and outputting voice communication with a data storage means storing the vehicle ID of the vehicle and an operation terminal for operating the device.
A mobile station system 1 having an extended function unit 4 composed of I / F means for performing / F, base station antennas 20, 20 ′ and 20 ″ for wirelessly transmitting and receiving a forward base, and moving via the base station antenna Wireless transmitting / receiving means 21 for performing wireless transmission / reception with the station system 1 and the headquarters system 3 via the dedicated line 5
A forward base station system 2 having a line transmitting / receiving means 22 for connecting to a line, a communication I / F means 31 for performing a communication I / F with a dedicated line, a communication control means 32 for performing a communication control control with the forward base station system 2, Data separating means 33 for separating and superimposing vehicle ID data, latitude and longitude data, voice data and the like from data received from the base station system 2, vehicle position calculating means 34 for calculating and outputting vehicle position data from latitude and longitude data, vehicle position data Base station selecting means 35 for selecting a forward base station capable of optimally receiving a radio signal from the mobile station system 1 based on the data, and storing data such as received data and map data of the forward base station capable of optimal reception. Means 3
6 and the like.

The mobile station system 1 has a plurality of GPS
1, G2, and G3, and calculates and outputs longitude / latitude data, and transmits mobile station data such as a vehicle ID and longitude / latitude data through the wireless transmission / reception means 12 so that the mobile station data can be received in a plurality of forward directions. The base station system 2 receives the mobile station data and relays the data to the headquarters system 3 via the dedicated line 5. The headquarters system 3 temporarily stores the mobile station data relayed from one or more forward base station systems 2 as received data in the data storage means 36 while receiving the data in parallel. The data separating means 33 separates vehicle ID data, latitude and longitude data, audio data, and the like from the received data. The vehicle position calculating means 34 calculates and outputs the current position data of the vehicle from the latitude and longitude data, and the base station selecting means 35 selects a forward base station capable of optimal reception based on the current position data of the vehicle and the map data, Connect to receive. In this case, the reception of the relay reception data from the unselected forward base station system is stopped, and the forward base station system is placed in a standby state for receiving from other vehicles.

The leased line 5 can be a public line such as a telephone or ISDN, a wireless communication means such as UHF or microwave, or an optical communication means using an optical cable, depending on the basic conditions of the region where the system is constructed. .

The configuration and operation of the mobile station system according to the present invention will be described in detail with reference to FIG. The mobile station system 1 according to the embodiment includes a wireless transmission / reception unit 12b for performing wireless communication of voice data and vehicle ID data with a forward base station system (2 in FIG. 1), a wireless transmission / reception unit 12 having a vehicle antenna 12a, and the like. GPS GPS from G1, G2, G3
A GPS unit 11 having a GPS antenna 10 for receiving a signal, a GPS receiving section 11a for demodulating GPS data from the received GPS signal, and a latitude / longitude calculation section 11b for calculating / outputting the longitude / latitude data of the current position of the vehicle from the GPS data. An I / F unit 15 for I / F with a data storage means 14 having a vehicle ID memory 14a storing a vehicle ID of the vehicle, a handset 18b for inputting and outputting voice communication, an operation terminal 18a for operating the apparatus, and the like. And an extended function unit 4 including a communication control unit 13 having a communication control unit 13a for performing communication control of the wireless transmission / reception unit 12.

Further, the extended function unit includes a retransmission determination unit 13 that determines a retransmission command and controls retransmission.
d, a transmission permission requesting unit 13b for requesting transmission permission to the headquarters system 3 via the forward base station system 2, a transmission permission determining unit 13c for receiving transmission permission from the headquarters system 3 and performing transmission control determination are added. is set up.

The wireless transceiver 12 b of the mobile station system 1
Are based on the communication control of the communication control unit 13a, based on the vehicle antenna 12a and the base station antenna (20, 20 ', 2 in FIG. 1).
0 ”), the voice data is previously stored in the vehicle ID memory 1 with the wireless transmitting / receiving means 21 of the forward base station system 2.
Wireless transmission is performed by adding vehicle ID data, time data, latitude and longitude data, etc. stored and registered in 4a.

The audio data is obtained by inputting / outputting, via an I / F section, data obtained by performing analog modulation / demodulation or digital modulation / demodulation of a voice signal input / output by the handset 18b, and is used as a standard in general wireless communication means. .

The latitude and longitude data includes a plurality of GPS G1,
The GPS signals from G2 and G3 are received by the GPS antenna 10, and the GPS receiver 11a demodulates the GPS data, and then the latitude and longitude calculator 11b calculates and outputs the latitude and longitude of the current position of the vehicle from the GPS data. is there.

The GPS unit 11 according to the embodiment further includes a map data memory 11 d storing map data, a display image generation unit 11 c for generating a display image based on the map data and the latitude and longitude data, and the like. , General G
It constitutes a PS navigation device. Further, a map additional information memory 14c for storing map additional information such as area data and vehicle ID is additionally installed in the data storage means 14 of the extended function unit 4, and the GPS navigation information includes area data and vehicles of nearby vehicles. The ID data and the like are additionally displayed to provide the driver with information on where in the communication area.

A detailed configuration of the headquarters system will be described with reference to FIG. The headquarters system 3 of the embodiment has a communication I / O having a plurality of line transmission / reception units 31A, 31B, 31C for communicating with a plurality of forward base station systems 2 via the dedicated line 5.
F means 31, communication control means 32 having a communication control section 32a for performing communication control with the forward base station system 2 and a reception completion transmitting section 32c for transmitting completion of reception, and a vehicle based on data received from the forward base station system 2. A data separating unit 33 having a vehicle ID data separating unit 33a for separating ID data, a latitude and longitude data separating unit 33b for separating latitude and longitude data, and a voice data separating and superimposing unit 33d for separating and superimposing voice data; Vehicle position calculating means 34 having a vehicle position calculating unit 34a for calculating and outputting vehicle position data from the vehicle, an area determining unit 35a for determining an area where the vehicle is located based on the vehicle position data, and optimal reception of a radio signal from the mobile station system 1. Base station selecting means 35 having a base station selecting section 35b for selecting a forward base station 2 capable of performing
It is standardized by a data storage means 36 having a reception data memory 36a for storing reception data and a map data memory 36b for storing map data of a forward base station capable of optimal reception.

Further, the map data memory 36b stores and registers in the data storage means 36 an area division map divided into communication areas capable of receiving base station data, the advanced base station capable of optimal reception and the latitude and longitude data. A latitude / longitude table 36c storing and registering a combination table with a polygon data memory 36d storing and registering polygon data obtained by combining advanced base stations capable of optimal reception and latitude / longitude data, an advanced reception capable of optimal reception A critical map memory 36e for storing and registering a critical map combining a base station and an actual map, a base station table 36f for storing and registering a table of areas and forward base stations capable of optimal reception are additionally provided. I have.

Further, the communication control means 32 includes a reception data error check section 32 b for performing an error check on the reception data, and the area data for transmitting the area-divided map data stored in the data storage means 33 to the mobile station system 1. A transmission unit (not shown), a retransmission instruction unit 32e for transmitting a retransmission instruction when an error occurs in received data, and a polling instruction unit for issuing a polling type transmission instruction to all mobile station systems in the receivable area. 32f, etc. are additionally provided.

Further, the base station selecting means 35 includes an identical reception data discriminator 35 c for identifying reception data at the same mobile station (same vehicle) and at the same time, and a reception data memory 36.
A reception data deletion unit 35d for deleting reception data from other than the forward base station capable of optimal reception among the same reception data stored in a is additionally provided.

FIG. 4 shows “the distribution map of mobile stations and forward base stations in the forward base station selection method at the time of wireless response according to the present invention”, and FIG. The detailed operation will be described with reference to FIG. FIG. 4 shows a plurality of vehicles C1 and C1 on which the mobile station system 1 is mounted, as described in the related art.
2, C3,... And the distribution of the base station antennas 20A, 20B, 20C of the forward base station system 2 are displayed on a map. In this figure, the zone where each base station antenna can transmit and receive is the range of the ellipses Z1, Z2 and Z3. The shaded portion indicates an area where the vehicle can operate (airy).
The difference from the display according to the prior art is that the small areas A1, A2, A3, A4,. . . . . Is divided into In each of the small areas, an advance base station that exclusively transmits and receives is set in advance.

The forward base station antenna 20A is located in area 1
A1, area 2 A2, area 3 A3, and area 4 A4, and forward base station antenna 20B
6, Area 9 A9, Area 10 A10, Area 11
A11, area 12 A12, and forward base station antenna 20C cover area 5 A5, area 7 A7, and area 8 A8. The map data representing these settings is stored and registered in a predetermined memory or table of the data storage means 36.

The reception data of the forward base station systems 2, 2 ′, 2 ″ transmitted via the dedicated line 5 is transmitted to the line transmitting / receiving sections 31 A, 31 corresponding to each forward base station system.
B, 31C perform reception demodulation ST1, ST1 ', ST1 ". The reception-demodulated mobile station data is temporarily stored in the reception data memory 35a, and is temporarily stored ST4, ST4', ST4".
At the same time, the reception data error check section 32b performs an error tick of the reception data error check, detects ST2 a reception data error due to interference between a plurality of mobile station systems and a radio wave propagation failure, issues a reception stop command, and re-executes a reception stop command. A retransmission command ST3 is issued to the transmission command section.

Under the condition that normal reception continues, the data separation unit 33 outputs the vehicle ID at the head of the reception data.
Data, latitude and longitude data, time data, and the like are preferentially separated ST5 and input to the vehicle position calculation unit 34a. The area determining unit 35a and the vehicle position calculating unit 34a calculate and output the running area of the vehicle ST6, and are further stored and registered in the map data memory 36b, the latitude and longitude table 36c, the polygon data memory 36d, the critical map memory 36e, and the like. The base station selection unit 35b performs a comparison operation based on the present map data, and selects a forward base station to be received based on the comparison operation result in ST7.

The same received data discriminating unit 35c receives the vehicle ID data of the received data in another received data memory area,
A comparison operation is performed on time data and the like, and the presence or absence of the same received data is detected ST8. When the same received data is detected, the received data is erased from the received data memory 36a ST9, and a stop command of the receiving operation of the forward base station is issued.

In a state where the same received data is not detected, the reception is continued, the ST10 received data is additionally stored, and the end command of the message is continuously detected. When the end command of the message is detected ST11, the formal registration of the reception data temporarily stored in the reception data memory 36a, the reception completion transmission command to the reception completion transmission unit 32c, and the transmission command unit 3
A control command is issued such as a transmission permission command to the mobile station on standby in 2d and a start of reception processing of the next vehicle (mobile station).

The structure of the transmission data transmitted from the mobile station is as follows: a header, vehicle ID data, latitude and longitude data, time data, and the like are arranged at the head, followed by message data and voice data, and finally transmitted. End data indicating the end of the data is added. The processing of detecting the reception data error, selecting the reception forward base station, and detecting the presence / absence of the same reception data is executed during the head period of the transmission data, and thereafter, the normal transmission / reception state is continued. When the normal transmission / reception period starts, the process of selecting the next receiving forward base station is started.

The voice data and the image data are not stored in the reception data memory 36 a in principle.
The voice data separation / superposition unit 33d exchanges the data with the voice communication unit 6 to which the voice data separation / superposition unit 33d is externally connected.
The voice communication means 6 is a voice input means such as a microphone,
It is composed of audio output means such as a speaker, audio transmission / reception control means, and the like, and normal audio transmission / reception is performed. Further, a facsimile or an image transmission device may be additionally provided.

The additionally installed area data transmission unit (not shown) transmits the area data to the mobile station system 1 from various map data stored and registered in the data storage unit 36 in the mobile station. This area data is received and registered in the data storage means (14 in FIG. 3) of the above-mentioned extended function unit (4 in FIG. 3).

[0040]

The present invention is embodied as described above, and has the following effects. The mobile station system receives signals from a plurality of GPSs, computes and outputs longitude and latitude data, and transmits mobile station data such as vehicle ID data and longitude and latitude data by wireless transmission / reception means so that mobile station data can be received. The forward base station system receives mobile station data and relays it to the headquarters system via a dedicated line, and the headquarters system receives the mobile station data relayed from one or more forward base station systems in parallel. , The data is temporarily stored as reception data in the data storage means, the data separation means separates the vehicle ID data and latitude and longitude data from the reception data, the vehicle position calculation means calculates and outputs the current position data of the vehicle from the latitude and longitude data, The base station selecting means performs a radio response for selecting a forward base station capable of optimal reception based on vehicle position data and map data. Proposal of the forward base selection method and the forward base selection system came out.

[Brief description of the drawings]

FIG. 1 is a schematic system configuration diagram of an embodiment of a forward base selection system at the time of wireless response according to the present invention.

FIG. 2 is a main part block diagram of an embodiment of a headquarters system according to the present invention.

FIG. 3 is a main part block diagram of an embodiment of a mobile station system according to the present invention.

FIG. 4 is a distribution map of a mobile station and a forward base station in the forward base station selection method at the time of wireless response according to the present invention.

FIG. 5 is an operation flowchart of selecting a forward base station at the time of wireless response according to the present invention;

FIG. 6 is a distribution map of a mobile station and a forward base station according to the related art.

[Explanation of symbols]

A1, A2, A3, A4, A5 Area C1, C2, C3 Vehicle G1, G2, G3 GPS 1 Mobile station system 2 Forward base station system 3 Headquarters system 4 Extended function unit 5 Dedicated line 6 Voice communication means 10 GPS antenna 11 GPS Unit 11a GPS receiving unit 11b Latitude and longitude calculating unit 11c Display image generating unit 11d Map data memory 11e GPS display unit 12 Wireless transmitting / receiving unit 12a Vehicle antenna 12b Wireless transmitting / receiving unit 13, 23 Communication control unit 13a Communication control unit 13b Transmission permission requesting unit 13c Transmission permission determination unit 13d Retransmission determination unit 14 Data storage means 14a Vehicle ID memory 14c Map additional information memory 15 I / F unit 18a Operation terminal 18b Handset 20, 20 ', 20 ", 20A, 20B, 20C Base station antenna 21 Wireless Sending and receiving Means 22 Line transmission / reception means 31 Communication I / F means 31A, 31B, 31C Line transmission / reception section 32 Communication control section 32a Communication control section 32b Reception data error check 32c Reception completion transmission section 32d Transmission command section 32e Retransmission command section 32f Polling command section 33 Data separation means 33a Vehicle ID data separation part 33b Latitude / latitude data separation part 33c Transmission time data separation part 33d Audio data separation / superposition part 34 Vehicle position calculation means 34a Vehicle position calculation part 34b Movement prediction calculation part 35 Base station selection means 35a Area determining unit 35b Base station selecting unit 35c Same received data discriminating unit 35d Received data erasing unit 36 Data storage means 36a Received data memory 36b Map data memory 36c Coordinate and latitude table 36d Polygon data memory 36e Critical map Memory 36f base station table

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 10, 2000 (2000.2.1
0)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Hirotaka Ariga 1116, Suenaga, Takatsu-ku, Kawasaki F-term in Fujitsu General Limited (reference) 5K067 AA14 BB26 BB36 DD17 DD30 DD53 DD54 DD57 EE02 EE10 EE16 EE23 EE33 EE37 EE45 EE53 FF03 FF05 FF16 FF23 GG07 HH07 HH22 HH23 HH25 JJ56 JJ72 KK15

Claims (33)

[Claims] 1. A mobile station system for a large number of vehicles that performs communication operation in a wide area, a plurality of forward base station systems for relaying wireless communication with the mobile station system, a plurality of forward base station systems, and a headquarters system. (Automatic Vehicle Monitorin) comprising a dedicated line for communicatively connecting the mobile station system and a headquarters system for communicating with the mobile station system via the forward base station system, such as voice and data.
g) In a method of selecting a forward base at the time of wireless response of a system or a wide area wireless system, a wireless transmitting / receiving means for performing wireless communication such as voice and data with the forward base station system, and a plurality of GPS (Global Pos.
a GPS unit that receives signals from the vehicle and a data set that stores and outputs vehicle ID (number) of the vehicle, and a handset and a device that performs input and output of voice communication. A mobile station system having an extended function unit composed of an operation terminal or the like performing an operation and an I / F means for interfacing (hereinafter referred to as I / F); a base station antenna for wirelessly transmitting / receiving a forward base station; A radio transmission / reception unit for performing radio transmission / reception with the mobile station system via the base station antenna, a forward base system having a line transmission / reception unit for connecting to the headquarters system via the dedicated line, Communication I / F means for performing communication I / F; communication control means for performing communication control control with the forward base station system; A data separating unit for separating the vehicle ID data and the latitude and longitude data from the received data of the vehicle, a vehicle position calculating unit for calculating and outputting vehicle position data from the longitude and latitude data, and the mobile station based on the vehicle position data. Base station selecting means for selecting a forward base station capable of optimal reception of a radio signal from the system,
A headquarters system having data storage means for storing the received data and map data of a forward base station capable of optimal reception, and the mobile station system receives signals from a plurality of GPSs and stores longitude and latitude data. While calculating and outputting, mobile station data such as the vehicle ID and latitude and longitude data is transmitted by the wireless transmitting / receiving means, and a plurality of forward base station systems capable of receiving the mobile station data receive the mobile station data, The headquarters system relays the data to the headquarters system via the dedicated line, and the headquarters system temporarily receives the mobile station data relayed from one or more forward base station systems as reception data in the data storage means. The data separation means separates the vehicle ID data and the latitude and longitude data from the received data, The vehicle position calculating means calculates and outputs the current position data of the vehicle from the latitude and longitude data, and the base station selecting means selects a forward base station capable of optimal reception based on the current position data and the map data. A method for selecting a forward base at the time of wireless response. 2. The area data format according to claim 1, wherein the map data stored in said data storage means is divided into a plurality of communication areas (area divisions) capable of receiving said base station data. Method of selecting a forward base when responding to a wireless response. 3. The wireless response according to claim 1, wherein the map data stored in the data storage means is in a combination table format of the forward base station and the latitude and longitude data capable of optimal reception. How to select a forward base. 4. The map data stored in said data storage means is a map in a polygon (polygon) data format in which said forward base station capable of optimal reception and said longitude / latitude data are combined. The method for selecting a forward base at the time of wireless response according to claim 1. 5. The wireless response according to claim 1, wherein the map data stored in the data storage means is critical map data obtained by combining the forward base station capable of optimal reception and a real map. Time advance base selection method. 6. The forward base selection method at the time of wireless response according to claim 1, wherein a table of said area and said forward base station capable of optimal reception is additionally stored in said data storage means. 7. The communication control means further includes a reception data error check means for detecting a reception data error due to interference or a radio wave transmission failure, and a retransmission command means for issuing a retransmission command to the mobile station system. When the reception data error check means detects a reception data error,
The method of claim 1, further comprising transmitting a retransmission command to the mobile station system. 8. The communication control unit further includes a function of transmitting reception completion information to the mobile station system when reception is completed without detecting an error in the reception data. 3. The forward base selection method at the time of wireless response according to 1. 9. The wireless communication system according to claim 1, wherein a function of transmitting a next transmission command to said mobile station system after completion of reception of received data is additionally provided in said communication control means. How to select the forward base when answering. 10. The communication control means according to claim 1, further comprising a polling transmission command function for transmitting a polling transmission command to all mobile station systems located in the receivable area. Forward base selection method at the time of wireless response. 11. The communication control unit further includes an area data transmission function for transmitting the area-divided map data stored in the data storage unit to the mobile station system. 3. The forward base selection method at the time of wireless response according to 1. 12. The radio communication system according to claim 1, wherein the base station selecting means is additionally provided with a same reception data discriminating function for discriminating reception data at the same mobile station (same vehicle) and at the same time. How to select the forward base when answering. 13. The base station selecting means may further include a function of deleting received data from other than the forward base station capable of optimal reception among the same received data stored in the data storage means. The method according to claim 1, wherein the forward base is selected at the time of wireless response. 14. The dedicated line is connected to a telephone or ISDN (In
2. The method for selecting a forward base at the time of wireless response according to claim 1, wherein the method is a public line such as an integrated Services Digital Network). 15. The forward base selection method at the time of wireless response according to claim 1, wherein the dedicated line is wireless communication means such as UHF or microwave. 16. The method according to claim 1, wherein the dedicated line is an optical communication unit using an optical cable. 17. A mobile station system for a large number of vehicles that performs communication operation in a wide area, a plurality of forward base station systems for relaying wireless communication with the mobile station system, a plurality of forward base station systems, and a headquarters system. And a headquarters system that communicates with the mobile station system via the forward base station system, such as voice and data, during an AVM system or a wide area wireless system. A forward base selection system, a wireless transmitting / receiving unit having a vehicle antenna and a wireless transmitting / receiving unit for performing wireless communication of voice, data, and the like with the forward base station system; a GPS antenna for receiving GPS signals from a plurality of GPSs; GPS from the GPS signal
A GPS unit having a GPS receiver for demodulating data, a latitude and longitude calculator for calculating and outputting the latitude and longitude data of the current position of the vehicle from the GPS data, and a vehicle I of the vehicle.
Communication control between the data storage means having a vehicle ID memory storing D, a handset for performing input / output of voice communication, an operation terminal for operating the apparatus, and the like, and an I / F means for performing I / F and the wireless transmission / reception means. A mobile station system having an extended function unit comprising a communication control unit having a communication control unit for performing communication, a base station antenna for performing wireless transmission / reception of a forward base, and a wireless communication with the mobile station system via the base station antenna. A forward base station system having wireless transmitting / receiving means for performing transmission / reception, a line transmitting / receiving means for connecting to the headquarters system via the dedicated line, and a plurality of communication base stations for communicating with the plurality of forward base station systems via the dedicated line A communication I / F unit having a line transmitting / receiving unit, a communication control unit for controlling communication with the forward base station system, and transmitting completion of reception Communication control means having a reception completion transmission unit, a vehicle ID data separation unit for separating the vehicle ID data from the reception data from the forward base station system, a latitude and longitude data separation unit for separating latitude and longitude data, and voice data A data separation unit having an audio data separation / superposition unit that separates and superimposes, a vehicle position calculation unit having a vehicle position calculation unit that calculates and outputs vehicle position data from the longitude and latitude data, and A base station selecting unit having an area determining unit for determining an area where the vehicle is located, a base station selecting unit for selecting a forward base station capable of optimally receiving a radio signal from the mobile station system, and the like, and storing the received data. A reception data storage unit and a data storage unit having a map data memory for storing map data of a forward base station capable of optimal reception. A forward base selection system comprising a headquarters system. 18. A map data memory for storing map data in the GPS unit, a display image generating unit for generating a display image based on the map data and the latitude and longitude data, and a data storage for the extended function unit. 18. The forward base selection system according to claim 17, wherein a map additional information memory storing map additional information such as the area data and the vehicle ID is additionally installed in the means. 19. The forward base selection system according to claim 17, wherein a retransmission determination unit that determines a retransmission command and performs retransmission control is additionally installed in the extended function unit. 20. A transmission permission requesting unit for requesting the extended function unit to transmit via the forward base station system, receiving a transmission permission from a headquarters system, and making a transmission control determination. 18. The forward base selection system according to claim 17, further comprising: 21. A communication control means of the headquarters system,
18. A reception data error check unit for performing an error check of reception data is additionally provided.
4. The advance base selection system according to 1. 22. The communication control means of the headquarters system,
18. The forward base selection system according to claim 17, wherein an area data transmission unit for transmitting the area division map data stored in the data storage unit to the mobile station system is additionally installed. 23. The communication control means of the headquarters system,
18. The forward base selection system according to claim 17, further comprising a retransmission command unit for transmitting a retransmission command when an error occurs in received data. 24. The communication control means of the headquarters system,
18. The forward base selection system according to claim 17, wherein a polling command unit for issuing a polling type transmission command is additionally installed in all mobile station systems in the receivable area. 25. The communication control means of the headquarters system,
18. The forward base selection system according to claim 17, wherein an area data transmission unit for transmitting the area-divided map data stored in the data storage unit is additionally installed in the mobile station system. 26. An area division type map data memory storing and registering an area division map divided into communication areas in which the base station data can be received is additionally installed in the data storage means of the headquarters system. The forward base selection system according to claim 17, wherein: 27. A latitude and longitude table in which a combination table of said forward base station capable of optimal reception and latitude and longitude data is stored and registered in said data storage means of said headquarters system. Item 18. The forward base selection system according to Item 17. 28. A data storage means of the headquarters system further comprising a polygon data memory for storing and registering polygon data obtained by combining the advance base station data capable of optimal reception and the latitude and longitude data. The advance base selection system according to claim 17, characterized in that: 29. A data storage means of the headquarters system, further comprising a critical map memory storing and registering a critical map obtained by combining the forward base station data capable of optimal reception and an actual map. The forward base selection system according to claim 17, wherein: 30. The base station table additionally storing, in the data storage means of the headquarters system, a table of the area and a table of the forward base station capable of optimal reception. 4. The advance base selection system according to 1. 31. The communication control means of the headquarters system,
18. The forward base selection system according to claim 17, further comprising a movement prediction calculation unit that predicts and calculates a future position of the vehicle moving near the boundary of the area. 32. The base station selecting means of the headquarters system further includes an identical reception data discriminator for identifying reception data at the same mobile station (same vehicle) and at the same time. An advance base selection system as described. 33. A reception data erasing unit for erasing, from the same reception data stored in the data storage unit, reception data from other than the forward base station capable of optimal reception, in the base station selection unit of the headquarters system. 18. The forward base selection system according to claim 17, further comprising: