JP2000252842A - Vehicle state notice system and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle state notice system that surely informs a base station about information detected by a sensor which is provided to a vehicle with a simple configuration. SOLUTION: Base stations BA-BC are installed around an urban area in base station zones ZA-ZC, and the base stations BA-BC conduct repeated transmission of the same message data. The base stations BA-BC have receivers RA-RC. A reception repeater PR is installed in a small/medium communication zone in the inside of the urban area and in a suburb. When the output from an on-vehicle mobile terminal is low and transmission to a base station directly is difficult, the reception repeater RR relays via the Internet network 20. Let frequencies in a frequency band of 25 kHz be f1, f2, f3, f4 respectively, the frequency band for the frequencies f1-f3 be used for 'outgoing data transmission' from the base stations BA-BC to the mobile terminal, and the frequency band including the frequency f4 be used for 'incoming communication' from the mobile terminal to a host base station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system (communication system) for enabling communication with a mobile terminal, and particularly to an environment in which mobile communication is affected by multipath, fading, etc. due to buildings or the like. Using a communication method that enables highly-reliable communication of relatively simple information communication such as short message communication, reports the information detected by the onboard sensor to the base station or the management center connected to the base station. Method (reporting system). The present invention also relates to a report system (communication system) that enables effective use of frequency in the above-described communication and the like.

[0002]

2. Description of the Related Art Conventionally, an automobile (vehicle) is provided with various sensors, and much of the information sensed / acquired (detected) by these sensors is displayed on a panel or the like in a driver's seat and displayed to a driver. The state is shown. In addition, in Germany, in the event of a car accident,
A system has been put to practical use that can report the acquired information to an emergency center using a mobile phone or satellite communication and quickly respond to the accident. At present, there is a demand for a system for reporting the state of a vehicle obtained from a sensor provided to the vehicle to a service center that provides services according to the state of the vehicle.
For example, when an accident occurs, a report is sent to the emergency center to promptly respond to the accident, and if a failure occurs, a report is sent to a contractor or organization that repairs the vehicle failure and the failure is reported. A prompt response is desired.

[0003] Therefore, a mobile communication system that is optimal for making these reports is desired. Until now, various communication systems (communication systems) have been proposed for communicating information with a mobile terminal. Hereinafter, a communication method related to the communication method included in the present invention will be exemplified. (1) SMR (Specialized Mobile Radio) communication method:
This communication method is a method in which a base station is installed at the center of one area (zone) to enable communication in a service area of a large zone. However, this communication method requires a frequency in a wide frequency band to enable communication with a large number of users in a large zone.

(2) Cellular communication system: This communication system divides a service area zone into small zones (cells) to form a set of a large number of small zones as a whole, and transmits and receives at different frequencies for each small zone. And a large number of base stations are arranged as a whole to enable communication in a service area of a large zone. In the cellular system, since the frequency band is different for each cell, the distance is large in a large zone, and the frequency of the same frequency band can be used between cells where interference does not become a problem. The frequency band may be narrower than the above frequency band. However, since the frequency between adjacent cells that can interfere with each other is different from that between adjacent cells, a wider frequency band is required if not as much as the SMR method.

[0005]

When transmitting information detected and acquired by a sensor provided in an automobile, a huge number of satellite communications or mobile phones affected by the surrounding environment are used. There is a possibility that the system cannot be used for automobiles that are used. That is, when the communication line to be used is occupied or in an environment with poor communication conditions, there is a problem that a desired report cannot be made. Also,
Conventional communication systems including the above-described communication systems have the following problems.

Various mobile information communications currently applied, such as the above-mentioned SMR communication system and cellular communication system, have a disadvantage that a wide frequency band is required. The available frequency band is limited, and the use of broadband frequencies is also limited. For example, in information communication such as a simple message, the frequency use of the SMR communication system and the cellular system is not economical. Particularly, in the conventional communication system, communication such as voice communication and telephone is mainly performed, and communication of message data and data is handled in a subordinate manner.

[0007] Further, in mobile communications, especially in urban areas, there is a problem that communication is affected by communication obstacles such as multipath and fading caused by buildings. As a countermeasure against multipath, fading, and the like, a diversity system and the like have been tried, but if such a system is adopted, a problem that equipment prices rise will be encountered. Especially when communicating with mobiles, multipath,
Since the situation of communication failures such as fading always changes, countermeasures are not easy. Particularly in simple message data communication, there is a desire to reduce the price of equipment (equipment). However, if measures are taken against multipath and fading, the equipment price tends to rise. Unless such measures are taken from the viewpoint of price maintenance, the bit error of the received data becomes high, so that not only accurate communication cannot be performed, but also communication failure occurs in some cases.

In a multi-channel communication system such as a cellular communication system, in the case of small output, there is an example in which the output of a multi-channel transmitter is unified by one amplifier and output using a wideband amplifier. However, in general, a combiner that includes an output is used, and a circuit such as a duplex filter that separates a transmission frequency and a reception frequency is used to eliminate interference between channels. However, when such signal processing is performed, signal loss occurs, and the disadvantage that the antenna output is significantly reduced is encountered. If the power is increased to overcome this, it becomes necessary to increase the withstand voltage of the electronic circuit of the circuit or to take various other measures, which complicates the circuit and increases the price.

Further, the Internet (INTERNE
T) The use of a communication system has been attempted in a hurry, but the compatibility with the Internet communication system is used in the form of adding the Internet system on the system configuration or in relation to the telephone number system. Connecting to an Internet communication system is not appropriate from the perspective of efficient connection of the communication system.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides a vehicle state reporting device that can more reliably report information detected by a sensor provided in a vehicle to a base station with a simple configuration. It is.

[0011]

In order to solve the above-mentioned problems, the present invention is characterized by a communication system between a mobile terminal mounted on a vehicle and a base station.

[0012] The vehicle state notification device of the present invention includes a first range in which communication with a mobile terminal is possible, and a second range in which communication with mobile terminals in the vicinity of the first range is possible. A plurality of base stations communicable in the first range and mutually communicable with each other are provided around the first range, and one of the base stations is connected to the first base station. The base station transmits downlink message data at a narrow band frequency, and the other base station that has received the message data transmits the received message data at the received frequency, and transmits a transmission signal from the original base station and another base station. From the mobile terminal that has received the vehicle message using the communication method of transmitting the upstream message data to the base station using the second narrowband frequency different from the transmission of the downstream message data. A device, comprising: Connected to one or more state detectors for detecting the state of the vehicle, the data indicating the state of the vehicle detected by the state detector is designated by a center that manages the data, and a second narrow band frequency is used. It is characterized by being transmitted as message data.

According to the present invention, transmission of downlink message data from the base station is performed in a first narrow band, for example, 6.2.
It is performed at a frequency of 5 kHz. Upon receiving this downlink message data, the other base stations transmit the received message data at the received frequency. As described above, since the same message data is transmitted from a plurality of base stations, the mobile terminal can receive receivable data and a diversity effect can be obtained, so that the effects of multipath and fading can be reduced. The mobile terminal that has received the message data sends outbound message data to the base station at a frequency in a band different from the first narrow band. As described above, frequencies of different bands are used for transmission of downlink message data and transmission of uplink message data. Also, in this transmission method, no complicated communication protocol is used. That is, it is possible to reliably report the state of the vehicle detected by the state detector with a simple configuration. Also,
The data indicating the state of the vehicle detected by the state detector is sent to a center that manages (uses) the data, and the center that receives the data performs an appropriate service according to the state of the vehicle. be able to.

[0014] The vehicle condition reporting device may further include a storage device, and may store data output from the condition detector. Therefore, data indicating the state of the vehicle can be stored and held like a flight recorder in an aircraft.

The state detector includes a storage unit for storing the individual identification information, and outputs the individual identification information.
Or, to detect the engine speed and output the engine speed, or to detect the engine oil temperature and output the engine oil temperature, or to detect the engine oil amount and output the engine oil amount Or, detects the exhaust gas temperature and outputs the exhaust gas temperature, or detects the current shift number of the transmission and outputs the shift number, or detects the transmission oil amount of the transmission and detects the transmission oil amount. Output, or detecting the transmission oil temperature of the transmission and outputting the transmission oil temperature, or detecting the rotation speed of each drive shaft included in the transmission and outputting the rotation speed, or battery voltage And outputs the battery voltage, or
Either detecting the state of the plug spark and outputting good / bad state of the plug spark, or detecting the generator voltage and outputting the generator voltage, or detecting the cooling water temperature and detecting the cooling water temperature Or the cooling water amount is detected and the cooling water amount is output, or the cooling fan rotation speed is detected and the cooling fan rotation speed is output, or the cooling water flow rate is detected and the cooling water flow amount is detected. Output the flow rate, or
Detecting the brake oil temperature and outputting the brake oil temperature, or detecting the brake oil amount and outputting the brake oil amount, or detecting the fuel amount and outputting the fuel amount, or Detecting the state of the injector and outputting good / bad state of the fuel injector, or detecting the intake air flow rate and outputting the intake air flow rate, or detecting the vehicle speed and outputting the vehicle speed Or
Alternatively, the operation time of the braking operation is detected and the operation time is output, or the number of braking operations of the braking operation is detected and the operation frequency is output, or the operation state of the steering is detected and the operation state is output. To, or to detect the road that has been passed and output the route, or to detect the current position and output the current position, or to detect the operation time and output the operation time, or Whether the operation state of the wiper is detected and the operation state is output, or the on / off state of the light is detected and the on / off state is output.
Alternatively, whether the collision of the vehicle body is detected and the magnitude of the impact accompanying the collision is detected and the magnitude of the impact is output, or the collision direction is detected while the collision of the vehicle body is detected and the collision direction is output. Or, detecting the collision of the vehicle body and detecting the collision position and outputting the collision position, or detecting the operation of the airbag and outputting the state of the airbag, or any of the other It has a function.

Here, the state detector is a sensor which detects the above-mentioned various states of the automobile and outputs the predetermined output. The individual identification information includes a vehicle number, a vehicle verification number, a land transportation station registration number, and the like.

[0017] At least one of the plurality of base stations is connected to a wired communication network by wire, and is connected to the wired communication network, and receives a transmission signal from a mobile terminal within the communicable range to receive the wired signal. Providing reception relay means for relaying to a base station connected to the wired communication network via a communication network, and reception relay means for receiving transmission data from the mobile terminal,
Data received via the wired communication network is communicated to a base station by wire.

When the mobile terminal cannot perform upstream message data transmission from the mobile terminal directly to the base station, for example, when the output of the mobile terminal is low or when the communication condition is not good, And transmits it via a wired communication network, for example, an Internet communication network, to a base station connected to the Internet communication network. As a result, communication is possible without being affected by multipath and fading even when the mobile terminal is located at an arbitrary place. That is, in any zone, such as an urban area with many buildings and a suburb with few buildings, bit errors are small and uniform communication (reporting) becomes possible.

The present invention further provides a base station which has transmitted the downlink messages, monitors the transmission status of these messages, and transmits the next downlink message data when transmitting the next downlink message data. The message data is transmitted at a third narrowband traffic number different from that of the first base station, and the other base station that has received the message data transmits the received message data at the received frequency. The mobile terminal that has received the transmission signal from the base station may transmit the upstream message data to the base station using the second narrowband frequency different from the transmission of the downstream message data. Good.

Thus, the previous transmission of the downlink message data uses a frequency in a band different from that of the transmission of the current downlink message data. Since message data is transmitted at different frequencies in such a time-shifted state, no interference occurs. Although two narrow band frequencies are used, since one band frequency is narrow, it does not become a wide band as a whole. That is, effective use of the frequency band can be achieved, and communication can be performed in a narrow frequency band.

In the present invention, a subscriber terminal is connected to the wired communication network by wire, and message data from the subscriber terminal is connected to the wired communication network via the wired communication network. It may be transmitted as a downlink message from the base station. Thus, message data can be transmitted from the subscriber terminal.

Specifically, the narrow band frequency is 6.25.
kHz.

More specifically, the wired communication network may include an Internet communication network. As a result, the Internet system is incorporated into the wired line, and the existing communication system, data processing system, and communication device can be diverted, the system configuration becomes relatively inexpensive, and the system can be operated easily. In addition, it is possible to prevent a report from being impossible due to the limitation of the number of lines such as telephone lines.

According to the vehicle state notification method of the present invention, a first range in which communication with a mobile terminal can be performed, and a second range in which communication with mobile terminals in the vicinity of the first range can be performed. A communication method in which a plurality of base stations communicable in the first range and capable of wireless communication with each other are provided around the first range to communicate with each other. Of 1
The first base station transmits downlink message data at the first narrowband frequency, and the other base stations that have received the message data transmit the received message data at the received frequency to detect one or more vehicle states. When the vehicle state notification device connected to the state detector receives transmission signals from the original base station and other base stations, the data indicating the state of the vehicle detected by the state detector is converted to the data. A center to be managed is designated and transmitted as upstream message data using a second narrowband frequency different from the transmission of the downstream message data.

[0025] In the vehicle status reporting method, at least one of the plurality of base stations may be connected to a wired communication network by wire, connected to the wired communication network by wire, and transmitted from the mobile terminal to the communicable range. Receiving relay means for receiving a signal and relaying to a base station connected to the wired communication network via the wired communication network when performing communication, receiving relay means for receiving transmission data from a mobile terminal; May perform wired communication of data received via the wired communication network to a base station.

Further, the present invention is a recording medium for recording a vehicle state notification program in a vehicle state notification device,
A procedure for acquiring data indicating the state of the vehicle detected by the state detector, a procedure for storing the data in a storage device, and a center for managing the data, and a step in which the base station transmits the data. And transmitting the message data as message data using a second narrow-band frequency different from the first narrow-band frequency. As described above, the program for realizing the functions of the vehicle information reporting device in the computer is recorded on the recording medium, and the program is read from the recording medium to the computer, whereby the vehicle information reporting device can be easily realized using the computer.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of an embodiment of a vehicle state notification system using the vehicle state notification device of the present invention. FIG. 2 is a diagram illustrating a connection relationship between the base station and the receiver illustrated in FIG. A mobile terminal (mobile terminal) as a vehicle information notification device is mounted on a vehicle.

First, an outline of the vehicle information reporting system of the present embodiment will be described with reference to FIGS. In the present embodiment, various sensors (state detectors) are attached to the vehicle together with the mobile terminal. When the message data of the vehicle state detection request is sent from the service center (FIG. 9 :), the mobile terminal mounted on the vehicle acquires the data detected by the sensor (FIG. 9 :), and the data indicating the acquired vehicle state. To the base station (FIG. 9:
). Then, the data sent to the base station is sent to a service center that performs a predetermined service connected to the base station, and is analyzed and used (FIG. 9 :).

For example, individual identification information (including a vehicle number, a vehicle verification number, a land transportation station registration number, etc.) and data indicating an engine and other states can be utilized by an automobile dealer or an automobile manufacturer. Further, data indicating the current position of the vehicle and the like can be used in a road public corporation and the like. Further, the data indicating the individual identification information, the current position of the vehicle, and the state of each device of the vehicle can be used by a repair company or the police who repairs the vehicle, and can be promptly dealt with in the event of a vehicle failure or accident. In addition, the mobile terminal is provided with a storage device and stores data on the state of the vehicle detected by various sensors, so that it can be used for verification at the time of an accident, vehicle inspection, and the like.

Next, a communication system between the mobile terminal and the service center will be described. The service center is connected to a center device CENT described later, or includes a subscriber terminal 27 described later and communicates with a mobile terminal via a wired communication network such as the Internet.

In FIG. 1, a circular area indicated by a bold line at the center is an urban area, and a circular area indicated by a broken line including the urban area is called a base station area (base station zone). In this example, three base station zones ZA to ZC are provided,
Base stations BA to BC are installed around the city in these base station zones ZA to ZC, respectively. The base stations BA to BC have receivers RA to RC, respectively. Base station BA ~
The BCs are responsible for respective areas in the city area, and are capable of wireless communication within a circular area (zone) indicated by a broken line. The city area is, for example, an area in which a large number of high-rise buildings and the like are present and where a communication failure such as multipath and fading is highly likely to occur.

The outside of the city area surrounded by a thick circle is a suburban area. A base station zone, eg, base station zone ZA,
It straddles both urban and suburban areas. The mobile terminal mounted on the vehicle can move to any place in the city and suburbs,
Communication is possible in the communication area. Small and medium communication zones are defined in urban and suburban areas.
In these small / medium communication zones, receiving repeaters RR are installed. The receiving repeater RR relays when the output from the small mobile terminal is low and it is difficult to directly transmit to the base station. That is, since the output of the small mobile terminal is low, the receiving repeater receives the transmission data and transmits it to the base station via the Internet network 20 by wire, so that the mobile terminal can freely transmit the data via the base station. Can be sent to the destination. However, in the case of a mobile terminal having a high output, the signal can be directly transmitted to a nearby base station without passing through a receiving repeater.

Referring to FIG. 2, the configuration and connection relationship of the communication system illustrated in FIG. 1 will be described. As mentioned above,
Each base station BA, BB, BC has a receiver R
It has A, RB and RC. Each of the receivers RA, RB, and RC has a receiving antenna. Each base station BA,
BB and BC have transmission antennas. Base station BA
A central unit CENT is disposed near the telephone line, and a wired line, for example, a dedicated line, a PSTN (Public System Telephony)
e Network), ISDN, etc.
It is connected to an Internet network 20 as a wired communication network via a TN and a provider. In FIG. 2, an asterisk (*) mark indicates a provider of Inuichi Net.

In the connection relationship of the communication system illustrated in FIG. 2, the Internet network 20 is connected to the center device CENT connected to the base station BA by a wire through the PSTN, and also receives a relay RR through a provider. Is connected to The receiving repeater is also connected to the Internet network 20.
It is connected to the. Thereby, the Internet network 20
, The receiving repeater RR and the base station BA can be connected by wire. Not all of the base stations need to be connected to the Internet network 20, but at least one base station is connected to the Internet network 20 by wire. In the present embodiment, the base station BA is connected to the transmission circuit 2 by wire. All the receiving repeaters are connected to the Internet network 20. The reason is that, since one base station can be wirelessly communicated with another base station, if one base station is connected to the Internet network 20, data reception from the Internet network 20 can be communicated between the base stations. This is because the device receives and transmits the received data to another communication device via the Internet network 20.

FIG. 3 shows base stations BA to BC, receiving repeater R
R is a configuration diagram of a mobile terminal (terminal). Each of the base stations illustrated in FIG. 3 includes a transmitter TX including an antenna (antenna) 1, a transmission circuit 2, and a modulator 3, and a reception device R including a reception antenna 6 and a receiver 7. As will be described later, the transmission circuit 2 uses a plurality of channel frequencies, and therefore has a circuit for selecting the channel frequencies. The base station BA has a data processing device / memory 4 and a line interface (I /
F) The center device CENT composed of 5 is connected.
Although a detailed configuration will be described later with reference to FIG.
The NT is further connected to the Internet 20 via a wired line 22 and an Internet provider 26. As described above, the configuration of the base stations BA to BC does not require a special circuit, and an existing circuit can be used. Therefore, the configuration of the base station is simple.

In this embodiment, the Internet network 20 is used because there is an advantage that the system configuration is simplified because no exchange is used. Therefore, the communication network is not limited to the Internet network 20 as long as the communication network meets the purpose.

The mobile terminal P sending the message includes the antenna 8, the transmission sharing unit 9, the data processing device / display operation unit 1.
0, a receiver 11, and a battery 19 for powering these circuits. The mobile terminal P is connected to various sensors mounted on the vehicle, and acquires data output from these sensors. Then, the message is transmitted further including the acquired data and an identifier (specified separately) for designating a service center that manages and uses the data.

The receiving repeater RR includes the antenna 12 and the receiver 1
3. Data processing device / memory 14, and line I / F
15 Each of the receiving repeaters RR has a line I /
It is connected to the wired line 23 and the Internet provider 28 via F15, and is connected to the Internet network 20. Thus, the configuration of the receiving repeater is also simple.

The subscriber terminal 27 is also connected to the Internet 20 via the wired line 21 and the Internet provider 26. As a result, the data from the subscriber terminal 27 is transmitted to the base station B via the Internet network 20.
A is transmitted to A, enabling wireless communication to another base station and transmission to a mobile terminal.

FIG. 4 shows the center device CENT illustrated in FIG.
FIG. The center device CENT has the data processing device / memory 4 and the line interface (I / F) 5 as described above. The line I / F 5 is a receiving repeater that receives message data from the subscriber terminal 27 and message data from the mobile terminal via the Internet network 20, the wired lines 22A and 22B, and the Internet providers 27A and 27B. Receive data. These received data are output to the data processing device / memory 4. The data processing device / memory 4 has a first data processing device 41 and a second data processing device 42.

The data processing device / memory 4 stores the “downstream message sequence” from the subscriber terminal 27 located between the first data processing device 41 and the second data processing device 42. A first memory 431 for storing, a second memory 432 for storing incoming confirmation data from the subscriber terminal 27, and a third memory for storing transmission confirmation data to be transmitted from the mobile terminal P to the subscriber terminal 27. 433. These memories 431 and 433 are first-in first-out (FTFO) type memories, and output data input first from the first data processing device 41 to the second data processing device 42 first. Therefore, data from the first data processing device 41 is temporarily stored in these memories as a data string, and is output to the second data processing device 42.

In FIG. 4, the memory is illustrated as being divided into first to third memories. However, these memories may be integrated into one memory device, or may be configured as an independent and separate structure as illustrated. You can also.

The first data processing device 41 has a line I / F
Signal processing is performed not only on data received from the receiver 5 but also on data received from the receiver 7 in the same manner as described above.

The second data processing device 42 includes a memory 43
Is transmitted to the modulator 3 via the transmission circuit 2 and the antenna (antenna) 1 as a "down message".

With reference to FIGS. 1 to 4, basic operations of the transmitter TX, the center device CENT, and the receiving device RR will be described. The first data processing device 41 located upstream of the flow of message data has a line interface (I / F) 5.
And a line interface (I / F) 5
Are transmitted from a mobile terminal from a first Internet provider 27A connected to the Internet 20 via a wired line 22A and from a second Internet provider 27B connected to the Internet 20 via a wired line 22B, respectively. Message and subscriber terminal 27
Receive messages from.

The first data processing device 41 processes the message from the terminal and the message from the subscriber terminal 27 received by the line interface (I / F) 5 and processes the messages from the first to the first according to the contents. Third memory 431, 43
Go out to 3. The first data processing device 41 also receives data received by the reception antenna 6 and transmitted from the receiver 7, and processes data received by the reception antenna 6 in the same manner as data received from the Internet network 20. Then, the data is sorted and output to the first and third memories 431 to 433.

The second data processing device 42 includes first, third
, And output to the modulator 3 in the transmitter TX, and the data modulated by the modulator 3 is transmitted to the transmission circuit 2 and the antenna (antenna).
1 to the zone illustrated in FIG.

FIG. 5 is a diagram illustrating a method of using the channel frequency. In the field of existing mobile radio communications, V
In HF and UHF, channel frequency allocation is 2
5 kHz, 12.5 kHz, etc. are used. In the United States, 25 kHz is used for the time being,
Narrowing to 12.5 kHz is in progress. Also, 1
Narrowing the bandwidth to 6.25 kHz, which is half the frequency of 2.5 kHz, is a subject of research as a theme in the near future. In other frequency bands except for the 220 MHz frequency band, the practical use of a single channel or narrowing is The actual communication system and communication method in which the system is used with adjacent banded channels are not known.

In this example, the conventional 25 kHz frequency band is divided into four quarters of 6.25 kHz to narrow the frequency band. These frequency bands are respectively represented by f
1, f2, f3 and f4, the frequency bands f1 to f3 are used for “downlink data transmission” from the base station to the mobile terminal, and the frequency band f4 is transmitted from the mobile terminal to the higher-order base station. Used for "uplink communication". In the present embodiment,
The data from the subscriber terminal 27 is transmitted to the Internet network 20.
To the base station BA, and the data is transmitted to the base station B.
The data transmitted from A to any mobile terminal is also referred to as “downlink data”. As described above, by dividing 25.5 kHz into four bands and using them in a narrow band, they can be used as the frequencies of four channels, and the frequency band of one channel becomes the frequency band of four channels. Can be achieved.

According to the FCC of the United States, a plan to use a frequency of 6.25 KHz from 512 MHz or lower in 2005 as a measure for narrowing the band, and such a flow of frequency utilization is the same in other countries. It is. Therefore, the above-described use form in which the frequency is narrowed is in conformity with a future communication plan.

FIG. 6 is a diagram illustrating the relationship between the base stations and the channel arrangement, illustrating the relationship between the frequency bands f1 to f3 used for communication between the base stations. Although the case where a plurality of base stations are provided is illustrated in the above-described embodiment, the use form of the channel frequency in the case of a single base station is illustrated in Table 1.

[0052]

[Table 1]

When the base station first performs "downlink data transmission" using the frequency f1, the same message data is transmitted to another at the frequency f1 at which the data was received. When the mobile terminal operating at frequency f1 receives the data transmission, it transmits answerback at channel frequency f4.
The answer back transmission is received by the receiving repeater and transmitted to the base station BA via the Internet 20 as answer back.

The base station that performs the primary “downlink message” transmits using the next frequency f2. When the mobile terminal operating at the frequency f2 receiving the data receives the data transmission, it transmits answerback at the channel frequency f4. The answer back transmission is received by the receiving repeater and transmitted to the base station BA via the Internet 20 as answer back.

The base station that performs the next "downlink message" transmits using the next frequency f3. When the mobile terminal operating at the frequency f3 receiving the data receives the data transmission, it transmits an answer back at the channel frequency f4. The answer back transmission data is received by the receiving repeater and transmitted to the base station BA via the Internet network 20 as answer back. The answer back transmission is received by the receiving repeater and transmitted to the base station BA via the Internet 20 as answer back.

Further, the base station which performs the next "downlink message" returns to the original state and transmits using the frequency f1. The mobile terminal receiving the data transmits answer-back transmission at frequency f4. This transmission / reception operation is repeated.

As shown in the illustrated example, Table 2 illustrates the use form of the channel frequency when a plurality of base stations are installed.

[0058]

[Table 2]

When the base station BA first performs "downlink data transmission" using the frequency f1, the other base stations receiving the data transmit the same message data to the other at the same frequency f1 as the reception. . All receiving base stations repeat this transmission / reception operation. When the mobile terminal operating at frequency f1 receives the data transmission, it transmits answerback at channel frequency f4. The answer back transmission is received by the receiving repeater and transmitted to the base station BA via the Internet 20 as answer back.

The base station that performs the next “downlink message”
Transmit using the next frequency f2. The base station that has received the data transmits the same message data to the other at the same frequency f2 as received. This transmission / reception operation is repeated. When the mobile terminal operating at frequency f2 receives the data transmission, it transmits answerback at channel frequency f4. The answer back transmission is received by the receiving repeater and transmitted to the base station BA via the Internet network 20 as an answer pack.

The base station that performs the next "downlink message" transmits using the next frequency f3. The base station that has received the data transmits the same message data to the other at the same frequency f3 as received. This transmission / reception operation is repeated. When the mobile terminal operating at frequency f3 receives the data transmission, it transmits answerback at channel frequency f4. The answer back transmission is received by the receiving repeater and transmitted to the base station BA via the Internet 20 as answer back.

The base station that performs the next “downlink message” returns to the original state and transmits using the frequency f1. The base station that has received the data transmits the same message data to the other at the same frequency f1 as received. This transmission / reception operation is repeated.

As described above, in the present embodiment, the channel frequency is switched at a different time every time a downlink message is transmitted. Therefore, even when the zone is close and the message is transmitted continuously, there is no mutual interference and no interference. Does not occur. Further, in the present embodiment, unlike the method using a pair channel such as the SMR system, since transmission is performed for each channel, there is no mutual interference, a combiner or the like is not required, and the circuit configuration can be simple. Further, in the present embodiment, since the channel frequency is used in one antenna, communication can be performed efficiently without a combined loss. Further, in the present embodiment, since the same message is repeatedly transmitted, data can be received substantially without being affected by multipath, fading and the like. In this embodiment, no complicated communication protocol is provided between the base stations and between the base station and the mobile terminal or the mobile terminal (reception repeater) base station, and the receiving device responds. Only. Therefore, since the communication protocol is simple, circuits such as a transmitter and a receiver are also simplified.

FIG. 7 is a diagram illustrating the relationship between the mobile terminal and the channel wave number. The mobile terminal uses only the uplink frequency f4. Normally, the transmission output of the mobile terminal is low, so that interference is unlikely to occur in different zones even when transmitting at the same frequency f4 in different zones. Also, if one frequency f4 is used, reception by the receiving repeater becomes easy. Therefore, in the present embodiment, one frequency f4 is commonly used for uplink message data transmission. Needless to say, a plurality of uplink frequencies can be set in a state where a usable frequency band is allocated to uplink messages, or where communication volume and frequency of communication are extremely high.

Hereinafter, the operation of the embodiment of the present invention will be described. The message data is transmitted from the base station BA at the frequency f1. That is, certain data is modulated by the modulator 3, and the modulated data is transmitted to the air via the transmission circuit 2 and the antenna (antenna) 1. The message data transmitted from the base station BA is received by the receiver RB of the base station BB near the base station BA. That is, the base station BB
Modulates the message received at the same frequency f1 by the modulator 3 and immediately transmits it to the air via the transmission circuit 2 and the antenna (antenna) 1. The message data transmitted from the base station BB is received by the receiver RC of the base station BC near the base station BB. The base station BC has the same frequency f1
Immediately send the received message. That is, the base station BC modulates the message received at the same frequency f1 by the modulator 3 and transmits it to the transmission circuit 2 and the antenna (antenna) 1
Via air immediately. The base station BA monitors transmission data from the base stations BB and BC and confirms that its own base station can receive the message data transmitted by itself.

As illustrated in FIG. 1, zones configured as a small zone or a middle zone are defined in an urban area and a suburb, and a receiving repeater is appropriately installed in these small and middle zones. The receiving repeaters RR arranged in these small / medium zones receive the transmission radio wave of the f4 channel transmitted from the mobile terminal.

As illustrated in FIG. 3, in the relay receiver RR installed in the small / middle zone, the data received by the antenna 12 reaches the receiver 13, where it is demodulated, and The data is stored in the memory in the order of reception, is collected into a fixed amount of data packets, is signal-compressed, is subjected to TCP / IP header processing on the Internet, and is then wired via the line I / F 15. 23 to the Internet provider 28 of the Internet network 20,
Is sent to the center device CENT via the.

The data received by the center device CENT is:
As illustrated in FIGS. 3 and 4, the first and third memories 43 are provided for each data type by the first data processing device 41 in the data processing device / memory 4 via the line I / F 5.
1, 433 and their memories 431, 433
Is stored. Further, the data packet is decomposed in the first data processing device 41, error correction check,
Processing such as deletion of duplicated data is performed, and confirmation of the incoming call is sent to the memory sender, in this example, data to be backed to the mobile terminal P and data to be sent to the subscriber terminal 27 or another mobile terminal P. Each of the memories 431 is in turn.
433, and make a queue.

As illustrated in FIG. 3, the subscriber terminal 27
The message data is transmitted from the subscriber terminal 27 to the mobile terminal P via the wired line 21 connecting the subscriber terminal 27 and the Internet network 20 to the Internet provider 26.
Is transmitted to the Internet network 20 via the Internet provider 26, and transmitted to the center device C via the Internet provider 27 and the wired line 22.
Sent to ENT. Such message data is stored in the memories 431 to 433 of the data processing device / memory 4 of the center device CENT, and waits in a queue for a downlink message.
It is transmitted to the mobile terminal P via the transmitter TX. When transmitting a downlink message from the subscriber terminal 27 to the mobile terminal P, the mobile terminal P may also collectively send some incoming confirmation messages to the downlink message and transmit it.

As described above, these message data are repeatedly transmitted by the base stations BA to BC.

By repeatedly transmitting the same message data from a plurality of base stations in this manner, reliable message transmission becomes possible. Therefore, in any zone such as an urban area with many buildings and a suburban area with few buildings, bit errors are reduced and uniform communication becomes possible.
Such repeated transmission of the same message data results in a diversity effect, and a stable and highly reliable communication system with few bit errors can be established.

In the above-described embodiment, since the Internet system is incorporated in the wired line, the existing communication system, data processing system, and communication device can be used. As a result, the system configuration is relatively inexpensive and the system operation is easy.

As described above, among the four channels of the frequency of 25.5 kHz in the narrow band of 6.25 kHz, f1 to f3 are used for downlink data transmission and f4 is used for uplink data transmission. The use of the channel depends on the situation,
Can be set arbitrarily. For example, f
1 and f2, and f3 and f4 can be used for uplink data transmission. Further, the frequency band is not limited to 25.5 kHz, and may be used by dividing a wider frequency band into a large number of channels into a narrow band of 6.25 kHz. In addition, one narrow band can be used without being limited to 6.25 kHz. In the example described above, since the theme is to transmit message data, the narrow band is set to 6.2.
It was set to 5 kHz.

The implementation of the vehicle condition reporting device and the vehicle condition reporting method of the present invention is not limited to the above-described embodiment, but may take various modified forms. Although the preferred embodiment has been described with reference to the above-described illustration, the preferred embodiment of the present invention has described the system configuration including the Internet network 20, the receiving repeater and the subscriber terminal 27 and the operation thereof. However, there is no need for a device connected by these wired lines. Conversely, other devices can be added to the illustrated device configuration. Such modifications are readily made by those skilled in the art.

Further, a program for causing a computer to realize the functions of the vehicle state notification device of the present invention is recorded on a computer-readable recording medium, and the program recorded on this recording medium is read by a computer system and executed. By doing so, a vehicle state notification device may be realized. Further, a program for causing a computer to realize the communication function of the base station or the mobile terminal is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read and executed by the computer. Thereby, a base station or a mobile terminal may be realized.

Note that the "computer system" here includes an OS and hardware such as peripheral devices. The “computer system” also includes a homepage providing environment (or a display environment) if a WWW system is used. Also,
"Computer readable recording medium" means a floppy disk, a magneto-optical disk, a ROM, a CD-ROM.
And a storage device such as a hard disk built in a computer system. Further, "computer-readable recording medium" refers to a communication line for transmitting a program through a network such as the Internet or a communication line such as a telephone line for a short time, such as a communication line.
It also includes those that dynamically hold programs and those that hold programs for a certain period of time, such as volatile memories in computer systems serving as servers and clients in that case. Further, the above-mentioned program may be for realizing a part of the above-mentioned functions, and may be for realizing the above-mentioned functions in combination with a program already recorded in the computer system.

[0077]

As described above, according to the present invention, it is possible to reliably report the vehicle state with a simple configuration. That is, according to the present invention, each time a downlink message is transmitted, the channel frequency is switched at a different time, and the same data is transmitted repeatedly. There is no interference and no interference. As a result, a diversity effect can be provided, and a stable and reliable reporting system with little bit error can be established in any zone such as an urban area with many buildings and a suburb with few buildings. Also, data indicating the state of the vehicle detected by the state detector,
Since the notification is sent to the center that manages the data, the data can be utilized in the center that performs various services, and the optimum service can be provided.

According to the present invention, a notification system capable of efficiently using a frequency is provided. Further, according to the present invention, since transmission is performed for each channel, there is no mutual interference, a combiner or the like is not required, and the circuit configuration can be simple. Furthermore, according to the present invention, since the channel frequency is used for one antenna, communication (reporting) can be performed efficiently without a combined loss.

According to the present invention, an existing communication system, data processing system, and communication device can be used by incorporating a wired communication network such as the Internet. As a result, the system configuration is relatively inexpensive and the system operation is easy.

In the present invention, no complicated communication protocol is provided between the base stations and between the base station and the mobile terminal or the mobile terminal (reception repeater) base station. The device only responds. Since the communication protocol is simple, circuits such as a transmitter and a receiver are also simplified.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of a vehicle state notification system using a vehicle state notification device of the present invention.

FIG. 2 is a diagram illustrating a connection relationship between a transmitter, a receiver, and the like illustrated in FIG. 1;

FIG. 3 shows base stations BA to BC, a receiving repeater RR,
FIG. 2 is a configuration diagram of a mobile terminal.

FIG. 4 is a configuration diagram of a center device.

FIG. 5 is a diagram illustrating a method of using a channel frequency.

FIG. 6 is a diagram illustrating the relationship between the base station and the channel arrangement, illustrating the relationship between frequency bands f1 and f3 used for communication between the base stations.

FIG. 7 is a diagram illustrating a relationship between a mobile terminal and a channel frequency.

FIG. 8 is a diagram illustrating an outline of a vehicle state notification system according to the embodiment.

FIG. 9 is a diagram illustrating a response between the vehicle information notification device and a service center.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 antenna (antenna) 2 transmission circuit (transmitter) 3 modulator 4 data processing device / memory (data processing / memory) 5 line interface (I / F) 6 reception antenna 7 receiver 8 Antenna 9 ... Common transmission unit (transmission sharing unit) 10 ... Data processing device / display operation unit (data processing display operation unit) 11 ... Receiver 12 ... Antenna 13 ... Receiver 14 ... Data processing device / memory (data processing / memory) 15) Line I / F 19 ... Battery 20 ... Internet network 21-23 ... Wired line 26-28 ... Internet provider 27 ... Subscriber terminal 30 ... Car (vehicle) 31 ... Sensor (state detector) 32 ... Vehicle state Reporting devices 33a, 33b: base station 34: service center (management center)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H180 AA01 BB05 CC12 EE08 FF10 FF13 5K060 CC04 CC12 CC13 DD04 EE05 HH31 LL16 PP01 5K067 AA22 AA42 BB03 DD13 DD28 EE02 EE10 EE16 FF13 FF23 HH22 JJ12 LL05

Claims (4)

[Claims] 1. A communicable range including a first range in which communication with a mobile terminal is possible and a second range in which communication with mobile terminals in the vicinity of the first range are possible. A plurality of base stations communicable in the first range and mutually communicable with each other are provided around the first range, and a downlink message is transmitted from one of the base stations at a frequency of a first narrow band. A mobile terminal that transmits data, the other base station that has received the message data transmits the received message data at the received frequency, and the mobile terminal that has received transmission signals from the original base station and the other base station A vehicle status reporting device that uses a communication method for transmitting upstream message data to a base station using a second narrowband frequency different from the above-described downstream message data transmission, One or more states that detect the state Is connected to the output device,
A vehicle state report, wherein data indicating the state of the vehicle detected by the state detector is transmitted as message data using a second narrowband frequency by designating a center that manages the data. apparatus. 2. The vehicle state notification device according to claim 1, wherein the vehicle state notification device further includes a storage device, and stores data output from the state detector. 3. A communicable range including a first range in which communication with the mobile terminal is possible and a second range in which communication with mobile terminals in the vicinity of the first range is possible. In a communication method in which a plurality of base stations communicable in the first range and capable of wireless communication with each other are provided around the first range to perform communication, one of the base stations to the first The base station transmits downlink message data at a narrow band frequency, and the other base station that has received the message data transmits the received message data at the received frequency and connects to one or more state detectors that detect the state of the vehicle. When receiving the transmission signals from the original base station and other base stations, the designated vehicle state reporting device specifies data indicating the state of the vehicle detected by the state detector and a center that manages the data. And the down message above The second, which is different from the transmission of Jideta
A vehicle status notification method, wherein the message is transmitted as uplink message data using a narrow band frequency. 4. A recording medium on which a vehicle state notification program is recorded in a vehicle state notification device, a procedure for acquiring data indicating a state of the vehicle detected by a state detector, and storing the data in a storage device. And a procedure of designating a center that manages the data and transmitting the data as message data using a second narrowband frequency different from the first narrowband frequency transmitted by the base station. A computer-readable recording medium that records a vehicle state notification program to be executed by a computer.