JPH1168652A - Mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system that surely receives (acquires) a plurality of information signals even in the case a plurality of mobile bodies are to send information signals in response to a request signal, by allowing the system to have a control means that permits a transmission means to send an information signal when a reception means receives the request signal and providing the control means with a timing setting means that sets a transmission delay time of the information signal of its own mobile body to transmit the information signal. SOLUTION: A mobile communication device is provided with a reception means P2 that receives a request signal sent from other mobile body P3, a transmission means P4 that sends an information signal to the other mobile body P3, and a control means P5 that allows the transmission means P4 to send the information signal upon the receipt of the request signal by the reception means P2, wherein the control means P5 is provided with a timing setting means P6 that sets a transmission delay time of the information signal of its own mobile body P1 and transits the signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for receiving a request signal transmitted from, for example, another mobile unit (another vehicle), and transmitting the information signal to the own mobile unit (an own vehicle). Replies).

[0002]

2. Description of the Related Art Conventionally, as a device for transmitting a request signal and obtaining necessary information such as position information, vehicle speed information, and congestion information from another responding mobile unit, for example, Japanese Patent Application Laid-Open No. 7-334798 discloses a device. In the route guidance display device of the vehicle-mounted traveling position display device (so-called navigation system), there is a memory for transmitting and receiving traveling locus data of the own vehicle and a memory for storing traveling locus data of another vehicle. And a communication device for transmitting and receiving travel locus data of the own vehicle and other vehicles, and when a subsequent vehicle requests transmission of travel locus data from the preceding vehicle to the preceding vehicle, the preceding vehicle travels to the succeeding vehicle through the communication device. The trajectory data is transmitted (information is provided), and the position and map of the own vehicle and the trajectory of the preceding vehicle are displayed on the display of the following vehicle, so that the following vehicle can be easily tracked. It is an occupied unit.

However, in this conventional device, there is no technical idea of delaying transmission of a response signal (information signal) to a request signal, so that the following problem occurs. That is, when a plurality of mobile units return information signals simultaneously in response to the above-mentioned request signal, only the information signal having a high electric field strength is received by the vehicle (mobile unit) on the information receiving side, or the return signal is exchanged. Therefore, there is a problem that it is difficult to obtain a plurality of necessary information signals properly.

[0004]

According to the first aspect of the present invention, a control means for transmitting an information signal to a transmission signal when a reception signal receives a request signal is provided. The transmission delay time of the information signal is set and the timing setting means for transmitting the information signal ensures that the plurality of information signals are received (obtained) even when a plurality of mobile units try to transmit the information signal in response to the request signal. It is an object of the present invention to provide a mobile communication device capable of performing the following.

According to a second aspect of the present invention, in addition to the object of the first aspect of the present invention, the above-mentioned timing setting means allows the delay time of another information signal and the delay of the information signal of the own mobile unit. An object of the present invention is to provide a mobile communication device that can obtain a plurality of information signals more reliably by setting a delay time so that the time does not match.

According to a third aspect of the present invention, in addition to the object of the first aspect, it is also possible that the delay time of another information signal coincides with the delay time of the information signal of the own mobile unit. By retransmitting the information signal of the mobile unit when it is detected, the information signal can be reliably obtained by retransmission even if the two delay times coincide, ensuring fail-safe. It is an object of the present invention to provide a mobile communication device that can perform the communication.

According to a fourth aspect of the present invention, in addition to the object of the third aspect of the present invention, the transmission timing of the information signal is further delayed by a predetermined time at the time of the retransmission, so that the time of the retransmission is reduced. It is an object of the present invention to provide a mobile communication device capable of reliably obtaining an information signal.

According to a fifth aspect of the present invention, in addition to the object of the first aspect, when it is detected that the transmission timings of another information signal and the information signal of the own mobile unit coincide with each other. By retransmitting the information signal of the own mobile body after the transmission delay time, the information signal can be reliably obtained by retransmission even if the above-mentioned transmission timing coincides, and fail-safe It is an object of the present invention to provide a mobile communication device that can be secured.

According to a sixth aspect of the present invention, in addition to the object of the first aspect of the present invention, by simultaneously setting the transmission delay time in each mobile communication device, it is possible to simultaneously transmit information signals simultaneously. An object of the present invention is to provide a mobile communication device capable of avoiding reception failure due to delivery.

According to a seventh aspect of the present invention, in addition to the object of the first or second aspect of the present invention, the information signal is transmitted a plurality of times by the control means, so that the information signal can be more reliably transmitted. It is an object of the present invention to provide a mobile communication device that can be obtained from a mobile device.

According to an eighth aspect of the present invention, in addition to the object of the seventh aspect, there is provided a transmission intensity changing means for changing a transmission intensity of the transmission means, and the transmission intensity is changed every plural times of transmission. It is an object of the present invention to provide a mobile communication device capable of surely obtaining an information signal from an area where an information signal is desired to be obtained by setting.

According to a ninth aspect of the present invention, in addition to the object of the eighth aspect, the transmission intensity is set randomly for each transmission by the control means, thereby facilitating the setting of the transmission intensity. It is an object of the present invention to provide a mobile communication device capable of realizing communication.

According to a tenth aspect of the present invention, in addition to the object of the first aspect, the delay time is randomly set by the timing setting means, thereby facilitating the setting of the delay time. It is an object of the present invention to provide a mobile communication device that can perform the communication.

[0014]

According to a first aspect of the present invention, there is provided a receiving means for receiving a request signal transmitted from another mobile body, a transmitting means for transmitting an information signal to another mobile body, Control means for causing the transmitting means to transmit the information signal when the receiving means receives the request signal, wherein the control means includes a transmission delay time of the information signal of the own moving body. The mobile communication device is provided with a timing setting means for setting and transmitting the setting.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the timing setting means includes a delay time of another information signal and a delay time of an information signal of the own mobile unit. Is a mobile communication device that sets a delay time so that the values do not match.

According to a third aspect of the present invention, in addition to the configuration of the first aspect, the timing setting means transmits the information signal at the timing set by the timing setting means. A mobile communication device for retransmitting the information signal of the own mobile unit when detecting that the delay time of another information signal matches the delay time of the information signal of the own mobile unit. And

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect of the present invention, there is provided a mobile communication device for further delaying the retransmission by a predetermined time.

According to a fifth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the timing setting means causes the information signal to be transmitted at a timing based on a predetermined rule, When detecting that the transmission timings of the information signal and the information signal of the own mobile unit match, the mobile communication device is configured to retransmit the information signal of the own mobile unit after the transmission delay time. I do.

According to a sixth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the transmission delay time is set in a mobile communication device that is uniquely set for each mobile communication device. There is a feature.

According to a seventh aspect of the present invention, in addition to the configuration of the first or second aspect, the control means is a mobile communication device for transmitting the information signal a plurality of times. Features.

According to an eighth aspect of the present invention, in addition to the configuration of the seventh aspect, the control means includes a transmission intensity changing means for changing the transmission intensity of the transmitting means, and Characterized in that it is a mobile communication device that sets a transmission intensity for each transmission.

According to a ninth aspect of the present invention, in addition to the configuration of the eighth aspect, the control means is a mobile communication device for randomly setting a transmission intensity for each transmission. It is characterized by.

According to a tenth aspect of the present invention, in addition to the configuration of the first aspect, the timing setting means is a mobile communication device for randomly setting the delay time. I do.

[0024]

According to the first aspect of the present invention, as shown in the claim correspondence diagram of FIG. 14, the receiving means P2 of the own mobile unit P1 transmits the request signal transmitted from the other mobile unit P3. And the transmission means P4 transmits the other mobile object P3
The control means P5 transmits the information signal to the receiving means P2.
Transmits the information signal to the transmission means P4 when the request signal is received, and the timing setting means P6 provided in the control means P5 sets the transmission delay time of the information signal of the mobile unit P1 and transmits the information signal. Let it. Therefore, even when a plurality of mobiles P1 and P7 try to send information signals to the request signal, the plurality of information signals can be reliably received (obtained) by setting the delay time by the timing setting means P6. There is an effect that can be done.

According to the invention described in claim 2 of the present invention,
In addition to the effect of the first aspect of the present invention, the timing setting means P6 is provided with another information signal (third party mobile P7).
Is set so that the delay time of the information signal of the own mobile unit P1 does not coincide with the delay time of the information signal of the own mobile unit P1, so that a plurality of information signals can be obtained more reliably on the other mobile unit P3 side. There is an effect that can be.

According to the third aspect of the present invention,
In addition to the effect of the first aspect of the present invention, the timing setting means P6 transmits the information signal at the timing set by the timing setting means P6, and transmits another information signal (third party mobile object P7). When it is detected that the delay time of the information signal of the own mobile unit P1 matches the delay time of the information signal of the own mobile unit P1, the information signal of the own mobile unit P1 is retransmitted. As a result, even if the two delay times coincide with each other, the information signal can be reliably obtained by the retransmission processing (the other mobile unit P3 can reliably receive the information signal), and the fail-safe operation can be performed. There is an effect that can be secured.

According to the invention described in claim 4 of the present invention,
In addition to the effect of the third aspect of the invention, since the information signal is further delayed for a predetermined time at the time of retransmission, the information signal at the time of retransmission can be reliably obtained (received) at the other mobile unit P3 side. There is an effect that can be done.

According to the invention described in claim 5 of the present invention,
In addition to the effect of the first aspect of the present invention, the timing means P6 transmits an information signal at a timing based on a predetermined rule and transmits another information signal (an information signal reference from a third-party mobile P7). ) And the transmission timing of the information signal of the own mobile unit P1 are detected,
The information signal of the own mobile unit P1 is retransmitted after the transmission delay time described above. Therefore, even in the case where the above-described transmission timings coincide with each other, the information signal can be reliably obtained on the other mobile unit P3 side by the retransmission processing after the transmission delay time, and fail-safe is ensured. There is an effect that can be.

According to the invention described in claim 6 of the present invention,
In addition to the effect of the first aspect of the present invention, since the transmission delay time is set uniquely for each mobile communication device, the transmission delay time is caused by the simultaneous transmission of the information signal to another mobile P3. As a result, there is an effect that it is possible to favorably avoid reception failure at the other mobile unit P3.

According to the invention of claim 7 of the present invention,
In addition to the effect of the first or second aspect of the invention, since the control means P5 transmits the information signal a plurality of times, there is an effect that the information signal can be more reliably obtained on the other mobile unit P3 side.

According to the invention described in claim 8 of the present invention,
In addition to the effect of the seventh aspect of the present invention, the control means P5 includes a transmission strength changing means P8 for changing the transmission strength of the transmission means P4, and sets the transmission strength for each of a plurality of transmissions. Area where signal is desired (for example, other mobile object P3)
An information signal can be reliably obtained from an area distant from the area).

According to the ninth aspect of the present invention,
In addition to the effect of the first aspect of the present invention, since the control means P5 randomly sets the transmission intensity for each transmission, there is an effect that the transmission intensity setting can be facilitated.

According to the tenth aspect of the present invention, in addition to the effect of the first aspect, the timing setting means P6 sets the delay time at random, thereby facilitating the setting of the delay time. There is an effect that can be achieved.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. Although the drawing shows a communication device for a mobile object, in FIG. 4, the navigation system configuration of the own vehicle A as the own mobile object, the other vehicle B as the other mobile object, and the third-party vehicle D are the same. The navigation system configuration will be described with reference to FIGS.

In FIG. 1 and FIG. 2, a directional antenna 2 having both directivity and transmission is provided outside the vehicle 1, and a receiving circuit 3 and a transmitting circuit 4 are connected to the antenna 2. The antenna 2 and the receiving circuit 3 constitute a receiving means, and the receiving means uses the request radio signal β from another vehicle B (hereinafter simply referred to as a request signal) (see FIG. 4).
Is configured to be received.

The transmitting means is constituted by the antenna 2 and the transmitting circuit 4, and the transmitting means generates the request signal β.
(See FIG. 4) or an information signal α (see FIG. 4) in response to the request signal β. The above-mentioned receiving circuit 3 and transmitting circuit 4 are provided with a CP as a control means.
U5, the CPU 5 controls the transmission of the information signal α to the transmission circuit 4 and the antenna 2 when the antenna 2 and the reception circuit 3 receive the request signal β.

On the other hand, a GPS receiver 6 is connected to a GPS antenna 6 for receiving radio waves from a GPS satellite (not shown). A vehicle speed sensor 9 as a vehicle speed detecting means is connected to the CPU 5 respectively, and the own vehicle position, traveling direction and speed calculating unit 10 (hereinafter simply abbreviated as a calculating unit) as the own moving body state detecting means formed inside the CPU 5. )
To calculate the position, traveling direction, and traveling speed of the vehicle 1.

Inside the CPU 5, the above-described operation unit 10 is provided.
Transmission / reception signal processing unit 11, random number generation unit 12, timer 1
3 are formed, and the state of the own vehicle A (see FIG. 4) (the traveling direction in detail) and the state of the other vehicle B (see FIG. 4) (the traveling direction in detail) are included in the transmission / reception signal processing unit 11. A transmission prohibition processing unit 14 (prohibiting means) that prohibits the transmission of the information signal α based on the information.

On the input side of the CPU 5, a manual switch 15 for performing various input operations, a route guidance input means 16 such as a joystick for inputting and setting a route guidance route, and a CD-ROM such as a CD-ROM for storing map information. The map memory 17 is connected via an interface.

On the output side of the CPU 5, a navigation screen, various input operation screens, an LCD 18 as display means for displaying the state of the moving body (vehicle speed, air conditioning setting, etc.) in a touch-operable manner, and an informing means And a buzzer 19 are connected via an interface.

The CPU 5 described above stores in the ROM 20 based on various input signals from the GPS receiver 7, the gyro 8, the vehicle speed sensor 9, the receiving circuit 3, the route guidance input means 16, the map memory 17, and the manual switch 15. According to the stored program, the transmission circuit 4, the LCD 18,
The drive of the buzzer 19 is controlled, and the RAM 21 stores necessary data and maps.

FIG. 3 shows an example of the display contents displayed on the LCD 18 described above.
, The own vehicle position a, and the traffic congestion position b as indicated by the white arrow are visually displayed. FIG. 5 shows a data format of a request signal β transmitted from a vehicle on the information receiving side, that is, another vehicle B (see FIG. 4). The request signal β has a start bit 22 and an own vehicle ID bit 23.
, An area designation type bit 24 for designating an area from which an information signal α (see FIG. 6) is to be obtained, an area designation bit 25 for designating a coordinate point and the like, an own vehicle position information bit 26, and an own vehicle traveling direction bit 27. Route guidance path bit 2 which becomes a "1" signal during route guidance and becomes a "0" signal during non-route guidance
8, a route guidance path traveling direction bit 29 including, for example, a road number and a traveling direction of the vehicle, and an end bit 30.

Here, the above-mentioned area designation type bit 24
Is a type bit for specifying an area from which an information signal α (see FIGS. 4 and 6) is to be obtained. For example, a specific area for obtaining an information signal α from a large number of areas defined by thin lines in FIG. 3 is specified. Or a designated type bit for designating within a range of a predetermined radius centering on a pinpoint such as an intersection C, and for designating a specific part of a route guidance destination.

FIG. 6 shows an information signal α (that is, a response signal) returned from the vehicle on the information providing side, that is, the vehicle A (see FIG. 4).
The information signal α includes a start bit 31, a source ID bit 32 (same as the own vehicle ID bit 23 shown in FIG. 5), a time bit 33, and a recognition bit for specifying the information providing vehicle. Vehicle ID bit 34 as
, A position information bit 35, a vehicle speed bit 36, a congestion bit 37 averaging the detected vehicle speed and automatically determined by the CPU 5, a traveling direction bit 38, and an end bit 39.
It is composed of By the way, the GPS receiver 7, the gyro 8, and the vehicle speed sensor 9 shown in FIG. 2 constitute a current position detecting means for detecting the current position of the vehicle A (see FIG. 4).

The CPU 5 shown in FIG. 2 is a control means for transmitting the information signal α to the transmitting circuit 4 and the antenna 2 when the antenna 2 and the receiving circuit 3 of the own vehicle A receive the request signal β from the other vehicle B. is there. In addition, the CPU 5 also functions as timing setting means (see the fifth step S5 in the flowchart shown in FIG. 8) for setting and transmitting the transmission delay time of the information signal α of the vehicle A.

The operation of the thus configured mobile communication device will be described below. First, the storage operation process of the CPU 5 in the vehicle 1 (the other vehicle B in this embodiment) that issues the request signal β will be described with reference to the flowchart of FIG.

In the first step U1, the CPU 5 determines whether or not the GPS signal is received at predetermined time intervals, for example, every 5 seconds, based on the input from the GPS receiver 7, and skips to the fourth step U4 when NO is determined. On the other hand, when the determination is YES, the process moves to the next second step U2. In this second step U2, the CPU 5 calculates the current position based on the received GPS signal, and in the next third step U3, the CPU 5 stores the calculated current position in the RAM 21.

Next, in a fourth step U4, the CPU 5 determines whether or not a predetermined short time, for example, 3 seconds, has elapsed. When the determination is NO, the CPU 5 skips to the eighth step U8, while YES
When the determination is made, the process proceeds to the next fifth step U5. This fifth
In step U5, the CPU 5 calculates the vehicle speed V based on the input from the vehicle speed sensor 9, and in the next sixth step U6, the CPU 5
Numeral 5 calculates the traveling direction based on the input from the gyro 8.

The processing in the fifth and sixth steps U5 and U6 is performed when a GPS signal from a GPS satellite is not sufficiently obtained (for example, when traveling in a tunnel).
This is autonomous navigation processing to supplement this. Next, in a seventh step U7, the CPU 5 obtains the current position from the vehicle speed V and the traveling direction as the above-described calculation results, and stores the three of the vehicle speed V, the traveling direction, and the current position in the RAM 21.

Next, in an eighth step U8, the CPU 5 determines whether or not a predetermined time, for example, one minute has elapsed.
When the determination is S, the process proceeds to the next ninth step U9. In the ninth step U9, the CPU 5 determines that the vehicle speed V is 1.5 km, for example.
/ h is determined, and if the determination is NO, the process proceeds to the thirteenth step U13. If the determination is YES, the process proceeds to the next tenth step U10.

In the tenth step U10, the CPU 5 determines whether or not the determination of V <1.5 Km / h has continued for a predetermined number of times, for example, five times or more.
13 and if YES, the next eleventh step U
Move to 11. The ninth and tenth steps U9, U
Since there is a possibility that an error is possibly included in the determination based on the predetermined value of 1.5 km / h and the five times at 10, smoothing control is performed.

In the above-mentioned thirteenth step U13, the CPU 5
In step U11, the CPU 5 determines whether the determination of V <1.5 Km / h is a predetermined number of times, for example, five consecutive times. That is, the process in the eleventh step U11 is for smoothing the process. When the NO determination is made in the eleventh step U11 (for example, six or more consecutive times), the fourteenth step U11
The process skips to step S14 and moves to the next twelfth step U12 when YES is determined.

In the twelfth step U12, the CPU 5 responds to the determination that V <1.5 km / h has been made five times,
It is determined that there is a traffic jam and stored in the RAM 21. In other words, this corresponds to setting the status bit 37 in FIG. Next, in a fourteenth step U14, the CPU 5 determines whether or not the return signal (information signal α) set by the request signal β has been received. Sometimes the next fifteenth step U1
Move to 5.

In this fifteenth step U15, the CPU 5 determines whether or not a transmission signal from another vehicle (this signal is a transmission signal from another vehicle that does not respond to the request signal) is received. When the determination is YES, the first
The process proceeds to step U16, and to the seventeenth step U17 when the determination is NO.

In the above-mentioned sixteenth step U16, the CPU 5
Stores the data of the received signal in the RAM 21 and
In step U17, the CPU 5 determines whether or not there is data in the RAM 21 for a predetermined time, for example, five minutes or more. When the determination is NO, the process returns. On the other hand, when the determination is YES, the process shifts to the eighteenth step U18. In the eighteenth step U18, the CPU 5 clears the data in the RAM 21 five minutes or more ago.

In short, the processing in the flowchart of FIG. 7 is to update and store all the received information in the RAM 21. Based on the sequentially updated data, for example, the traffic congestion position b as shown by a white arrow in FIG. , The own vehicle position a can be visually displayed. Next, a signal return process on the information providing side (the host vehicle A side) will be described with reference to the flowchart shown in FIG.

In the first step S1, the CPU 5 determines that the vehicle A
(See FIG. 4) determines whether a request signal β from another vehicle B has been received, and returns when the determination is NO.
When the determination is YES, the process proceeds to the next second step S2. In the second step S2, the CPU 5 determines whether or not a reply is possible, that is, whether or not to return the information signal α. Next, in a third step S3, the CPU 5 determines whether or not a reply is possible. When the determination is NO, the CPU 5 returns to the first step S1, while when the determination is YES, the CPU 5 proceeds to the next fourth step S4.

In the fourth step S4, the CPU 5 creates a return signal (information signal α). At the time of this creation, if the request signal β includes an ID stored in the RAM 21 (see the own vehicle ID bit 23 in FIG. 5), the ID of the own vehicle A
(See vehicle ID bit 34 in FIG. 6) is also inserted into the return signal (information signal α).

Next, in a fifth step S5, the CPU 5 sets the timing (return timing of the return signal) and the intensity (electric field intensity of the return signal), respectively, and
A return signal (information signal α) is returned to another vehicle B via the antenna 2. Fifth step S of the main routine shown in FIG.
5 corresponds to the subroutine of each embodiment shown in FIGS. 9, 10, 11, and 12, and therefore, the timing setting and return signal transmission processing will be described below with reference to FIGS.

First, the flowchart of FIG.
2, 3, 4, 10) will be described with reference to FIG. In the first step S11, the CPU 5 starts monitoring reception of a return signal (other information signal d) by the third-party vehicle D (see FIG. 4).

Next, in a second step S12, the CPU 5 starts counting by the timer 13, and in the next third step S13
Then, the CPU 5 creates a random coefficient r1. Then the fourth
In step S14, the CPU 5 calculates a return timing T1 (corresponding to a transmission delay time) by multiplying the random coefficient r1 by a predetermined value t.

Next, in a fifth step 15, the CPU 5 determines whether or not the count value of the timer 13 has reached the return timing T1 = r1 × t, and returns when the determination is NO, while returns to the sixth when the determination is YES. Move to step S16. In the sixth step S16, the CPU 5 transmits a return signal (information signal α) to the other vehicle B at a predetermined electric field intensity.

Next, in a seventh step S17, the CPU 5 determines whether or not a return signal (other information signal d) by the third-party vehicle D has been received within a predetermined time, for example, about 1 second.
When the determination is NO, the process proceeds to the next eighth step S18, where YE
When the determination is S, the process proceeds to another tenth step S20. In the next eighth step S18, the CPU 5 ends the monitoring of the return signal (other information signal d) by the third party vehicle D, and in the next ninth step S19, the CPU 5 stops counting by the timer 13.

On the other hand, in the above-mentioned tenth step S20, C
PU5 resets the count of the timer 13 and the next first
In one step S21, the CPU 5 creates a random coefficient r2. Next, in a twelfth step S22, the CPU 5 multiplies the random coefficient r2 by a predetermined value t and returns a return timing T2.
(Corresponding to the transmission delay time).

Next, in a thirteenth step S23, the CPU 5 determines whether or not the count value of the timer 13 after the reset has reached the return timing T2 = r2 × t. When the determination is NO, the process returns to the step S23. When the determination is YES, the process proceeds to the above-described sixth step S16, and in this sixth step S16, the CPU 5 retransmits the return signal (information signal α) to the other vehicle B at a predetermined electric field strength.

As described above, according to the first embodiment shown in FIGS. 8 and 9, the antenna 2 and the receiving circuit 3 of the own vehicle A receive the request signal β transmitted from the other vehicle B, and
The transmission circuit 4 transmits the information signal α to the other vehicle B, and the control means (see CPU 5) transmits the information signal α to the antenna 2 and the transmission circuit 4 when the reception circuit 3 receives the request signal β. Is transmitted by the control means (CPU
5) (see FIG. 8).
In step S5), the transmission delay time (see the return timing T1) of the information signal α of the vehicle A is set and transmitted.
Therefore, even when a plurality of vehicles 1 attempt to send the information signal α in response to the request signal β, the other vehicle is set by the setting of the delay time (see the return timing T1) by the timing setting means (see the fifth step S5). On the B side, there is an effect that a plurality of information signals α... Can be reliably received (obtained).

The above-mentioned timing setting means (see the fifth step S5 in FIG. 8) determines the delay time of the other information signal α (see the information signal d from the third-party vehicle D) and the information signal of the own vehicle A. Since the delay time is set so that the delay time α does not coincide with the delay time T1 (see the return timing T1), the other vehicle B can obtain the information signals α, β.

Further, the above-mentioned timing setting means (refer to the fifth step S5 in FIG. 8) outputs the timing set by the timing setting means (the fifth step S15 in FIG. 9).
), The delay time of another information signal (see information signal d from third-party vehicle D) and the delay time of information signal α of own vehicle A (see return timing T1). When a match is detected (seventh step S1
7) (see step S17, S20).
The information signal α of the own vehicle A is retransmitted by the processing of S21, S22, S23, and S16. As a result, even if the two delay times coincide with each other, the information signal α can be reliably obtained (other vehicle B can reliably receive the information signal α) by the signal retransmission processing. This has the effect of ensuring fail-safe.

In addition, since the information signal α is further delayed for a predetermined time (timer = r2 × t) when retransmitting the information signal α, the information signal α at the time of retransmission is reliably obtained (received) on the other vehicle B side. There is an effect that can be.

Further, the above-mentioned timing setting means (see the fifth step S5 in FIG. 8) provides a delay time (return timing T).
1) is set at random using a random coefficient, so that there is an effect that simplification of delay time setting can be achieved.

Next, the flowchart of FIG.
2, 3, 4, 6.10) will be described with reference to FIG. In the first step S31, the CPU
5 starts monitoring reception of a return signal (other information signal d) by the third-party vehicle D (see FIG. 4).

Next, in a second step S32, the CPU 5
The reading of the unique delay timing Ta previously stored in the OM 20 is executed. Next, in a third step S33,
The CPU 5 starts counting by the timer 13, and in the next fourth step S34, the CPU 5 determines whether or not the count value of the timer 13 has reached the inherent delay timing Ta.
At the time of determination, the process returns to step S34, while YE
When the determination is S, the process proceeds to the next fifth step S35.

At the fifth step S35, the CPU 5 returns a return signal (information signal α) to the other vehicle B with a predetermined electric field strength. Next, in a sixth step S36, the CPU 5 determines whether or not a return signal (another information signal d) by the third-party vehicle D has been received within a predetermined time, for example, within about one second.
When the determination is made, the process proceeds to the next seventh step S37, and when the determination is YES, the process proceeds to another ninth step S39.

In the above-described seventh step S37, the CPU 5 determines that there is no simultaneous delivery of a plurality of information signals to the other vehicle B, and monitors the reception of the return signal (the other upper policy d) by the third-party vehicle D. Is completed, and in the next eighth step S38,
The CPU 5 stops counting by the timer 13. On the other hand, in the above-described ninth step S39, the CPU 5 determines that the simultaneous delivery of a plurality of information signals to the
Reset the count of

Next, in a tenth step S40, the CPU 5 creates a random coefficient r2, and in the next eleventh step S41.
Then, the CPU 5 returns the return delay timing (T2 = r2 × t).
Is calculated. That is, the return delay timing T2 is obtained by multiplying the random coefficient r2 by the predetermined value t.

Next, in a twelfth step S42, the CPU 5 determines whether or not the count value of the timer 13 after the reset has reached the return delay timing T2. When the determination is NO, the process returns to the step S42. The process proceeds to the fifth step S35 of the fifth step S3.
At 5, the CPU 5 retransmits the return signal (information signal α) at the predetermined electric field strength.

As described above, according to the second embodiment shown in FIGS. 8 and 10, the antenna 2 of the own vehicle A and the receiving circuit 3 are connected to the other vehicle B.
, The transmitting circuit 4 transmits the information signal α to the other vehicle B, and the control means (see CPU 5) receives the request signal β from the antenna 2 and the receiving circuit 3. At this time, the information signal α is transmitted to the antenna 2 and the transmission circuit 4 described above.
The timing setting means (see the fifth step S5 in FIG. 8) provided in the PU5) sets the transmission delay time (see the inherent delay timing Ta) of the information signal α of the vehicle A and causes the information signal α to be transmitted. Therefore, even when a plurality of vehicles 1 attempt to send the information signal α to the request signal β, the timing setting means (see the fifth step S5) sets the delay time (see the inherent delay timing Ta). On the vehicle B side, there is an effect that a plurality of information signals α can be received (obtained) reliably.

The above-mentioned timing setting means (see the fifth step S5 in FIG. 8) determines the delay time of the other information signal α (see the information signal d from the third-party vehicle D) and the information signal of the own vehicle A. Since the delay time is set so that the delay time α does not coincide with the delay time (see the inherent delay timing Ta), there is an effect that the other vehicle B can obtain the plurality of information signals α more reliably.

Further, the above-mentioned timing setting means (FIG. 8)
The fifth step S5 of FIG. 10 is based on the timing set by the timing setting means (the fourth step S5 of FIG. 10).
The information signal α is transmitted by the timer at Ta (see Ta = 34), the delay time of the other information signal α (see the information signal d from the third-party vehicle D) and the delay time of the information signal α of the own vehicle A (specifically). When it is detected that they match with the delay timing Ta (see the YES determination in the sixth step S36), each of the steps S36, S39, S40, S41, S4 is performed.
2. The information signal α of the vehicle A is retransmitted by the processing of S35. As a result, even in the event that the two delay times coincide with each other, the information signal α can be reliably obtained by the retransmission processing (other vehicle B can reliably receive the information signal α), and the failure occurs. There is an effect that the safe can be secured.

In addition, when the above-mentioned information signal α is retransmitted, it is further delayed by a predetermined time (twelfth step S42).
Timer T2), and transmits the information signal α at the time of retransmission to another vehicle B.
There is an effect that the side can reliably obtain (receive). Moreover, since the above-described transmission delay time (see the inherent delay timing Ta) is set uniquely for each mobile communication device, the transmission delay time (see the inherent delay timing Ta) is different from the transmission of the information signal α to the other vehicle B at the same time. There is an effect that it is possible to satisfactorily avoid reception failure in the car B.

Since the timing setting means (see the fifth step S5 in FIG. 8) randomly sets the delay time using the random coefficient r2, there is an effect that the delay time can be easily set. . Next, referring to the flowchart of FIG.
The processing of the embodiment will be described.

In the first step S51, the CPU 5 returns a signal (another information signal d) from the third-party vehicle D (see FIG. 4).
Start receiving monitoring for. Next, in a second step S52, C
PU 5 transmits a return signal (information signal α) to another vehicle B at a predetermined electric field strength.

Next, in a third step S53, the CPU 5 determines whether or not a return signal (another information signal d) by the third-party vehicle D has been received within a predetermined time, for example, within about one second.
When the determination is O, the process proceeds to the next fourth step S54, and YES
When the determination is made, the process proceeds to another sixth step S56. In the above-described fourth step S54, the CPU 5 ends the reception monitoring of the return signal (other information signal d) by the third-party vehicle D, and the CPU 5 stops counting the timer 13 in the next fifth step S55.

On the other hand, in the above-mentioned sixteenth step S56, C
PU5 receives a delay timing T specific to the vehicle from the ROM 20.
a is read, and the CPU 5 starts counting of the timer 13 in the next seventh step S57. Next, the eighth step S5
In step 8, the CPU 5 determines whether or not the count value of the timer 13 has reached the specific delay timing Ta. When the determination is NO, the process returns to step S58. When the determination is YES, the process proceeds to the second step S52. In the second step S52, the CPU 5 retransmits the return signal (information signal α) to another vehicle B at a predetermined electric field strength.

As described above, according to the third embodiment shown in FIGS. 8 and 11, the timing means (see the fifth step S5 in FIG. 8) transmits the information signal α at a timing based on a predetermined rule. At the same time, when it is detected that the transmission timing of another information signal (illuminated by the information signal d from the third-party vehicle D) and the information signal α of the own vehicle A match (see YES determination in the third step S53). In each step S53,
Own vehicle A by the processing in S56, S57, S58, S52.
Is retransmitted after the transmission delay time (see the timer = Ta in the eighth step S58). Therefore, even in the case where the above-mentioned transmission timings coincide with each other, the information signal α can be reliably obtained on the other vehicle B side by retransmission processing after the transmission delay time, and fail-safe is ensured. There is an effect that can be.

Since the transmission delay time (see inherent delay timing Ta) is set uniquely for each mobile communication device, it is caused by the simultaneous transmission of the information signal α to another vehicle B. Thus, there is an effect that it is possible to satisfactorily avoid reception failure in the other vehicle B. Next, FIG.
2. Each flowchart of FIG. 13 (claims 1, 7, 8, 9)
The processing of the fourth embodiment will be described with reference to FIG.

In the first step S61, the CPU 5 starts counting by the timer 13, and in the next second step S62,
The CPU 5 creates a random coefficient r1. Next, in a third step S63, the CPU 5 calculates a return timing T1. That is, the return timing T1 is obtained by multiplying the random coefficient r1 by the predetermined value t1.

Next, in a fourth step S64, the CPU 5 sets the electric field strength E of the return signal (information signal α). In addition,
This intensity setting process is executed based on a subroutine of FIG. 13 described later. Next, in a fifth step S65, the CPU
5 is the timing at which the count value of the timer 13 is returned (T1 =
(r1 × t1) is determined, and if the determination is NO, the process returns to step S65, while if the determination is YES, the process proceeds to the next sixth step S66.

In the sixth step S66, the CPU 5 transmits a return signal (information signal α) to the other vehicle B at the electric field strength E described above. Next, in a seventh step S67, the CPU 5 stops counting by the timer 13, and proceeds to a next eighth step S68.
Then, the CPU 5 determines whether or not the number of transmissions of the return signal has reached a predetermined number of times, for example, three times. And
If the determination is YES, the process is terminated. On the other hand, if the determination is NO, the process returns to the first step S61 to repeat the above process until the number of transmissions of the return signal (information signal α) reaches a predetermined number.

In the subroutine shown in FIG. 13, in the first step S71, the CPU 5 creates a random coefficient r3, and in the next second step S72, the CPU 5 multiplies the random coefficient r3 by a predetermined value t3 to obtain a return signal strength. Is calculated. As shown in FIGS.
According to the fourth embodiment shown in FIG. 3, the control means (see CPU 5) transmits the information signal α a plurality of times (see the eighth step S68), so that the information signal α is obtained more reliably on the other vehicle B side. There is an effect that can be.

The above-mentioned control means (see CPU 5) includes a transmission strength changing means (see fourth step S64 in FIG. 12) for changing the transmission strength of the antenna 2 and the transmission circuit 4.
Since the transmission intensity (refer to the electric field intensity E) is set for each of a plurality of transmissions, the information signal α can be reliably obtained from an area where the information signal α is desired (for example, an area far from the other vehicle B). is there. Further, the control means (CPU 5
13) randomly sets the transmission intensity for each transmission (see FIG. 13).
The subroutine of (1), the transmission intensity can be easily set.

In the correspondence between the structure of the present invention and the above-described embodiment, the moving body of the present invention corresponds to the vehicle 1 of the embodiment, and similarly, the other moving body corresponds to the other vehicle B, and The moving object corresponds to the vehicle A, the receiving means corresponds to the antenna 2 and the receiving circuit 3, the transmitting means corresponds to the antenna 2 and the transmitting circuit 4, the control means corresponds to the CPU 5, and the timing setting. The means corresponds to the fifth step S5 (see FIG. 8), the other information signal corresponds to the information signal d from the third party vehicle D, and the transmission intensity changing means corresponds to the fourth step S64 (FIG. 12).
The present invention is not limited only to the configuration of the above-described embodiment.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a navigation system for a host vehicle and another vehicle.

FIG. 2 is a control circuit block diagram illustrating a mobile communication device according to the present invention.

FIG. 3 is an explanatory diagram showing an example of a display on an LCD.

FIG. 4 is a diagram illustrating the operation of the mobile communication device according to the present invention.

FIG. 5 is an explanatory diagram showing a data format of a request signal.

FIG. 6 is an explanatory diagram showing a data format of an information signal.

FIG. 7 is a flowchart showing CPU storage operation processing of the information receiving vehicle.

FIG. 8 is a main routine showing a signal returning process of the information providing vehicle.

FIG. 9 is a flowchart showing a first embodiment of a subroutine.

FIG. 10 is a flowchart showing a second embodiment of the subroutine.

FIG. 11 is a flowchart showing a third embodiment of the subroutine.

FIG. 12 is a flowchart illustrating a fourth embodiment of the subroutine.

FIG. 13 is a flowchart showing a random setting process of a return signal strength.

FIG. 14 is a diagram corresponding to claims.

[Explanation of symbols]

 A: own vehicle (own moving object) B: other vehicle (other moving object) α: information signal β: request signal d: other information signal 1: vehicle (moving object) 2: antenna 3: receiving circuit 4: transmitting circuit 5 CPU (control means) S5 timing setting means S64 transmission intensity changing means

Claims (10)

[Claims] 1. A receiving means for receiving a request signal transmitted from another mobile body, a transmitting means for transmitting an information signal to another mobile body, and a transmitting means for receiving the request signal when the receiving means receives the request signal. Control means for transmitting an information signal, wherein the control means comprises a timing setting means for setting a transmission delay time of an information signal of the own moving body and transmitting the information signal. Communication device. 2. The mobile communication apparatus according to claim 1, wherein said timing setting means sets the delay time such that the delay time of another information signal does not coincide with the delay time of the information signal of the own mobile body. 3. The timing setting means transmits the information signal at the timing set by the timing setting means, and the delay time of another information signal coincides with the delay time of the information signal of the own mobile unit. The mobile communication device according to claim 1, wherein when detecting the fact, the information signal of the mobile unit is retransmitted. 4. The mobile communication device according to claim 3, wherein said retransmission is further delayed by a predetermined time. 5. The timing setting means causes the information signal to be transmitted at a timing based on a predetermined rule and, when detecting that the transmission timing of another information signal and the information signal of the own mobile unit coincide with each other. 2. The mobile communication device according to claim 1, wherein the communication device retransmits the information signal of the own mobile device after the transmission delay time. 6. The mobile communication device according to claim 1, wherein the transmission delay time is set uniquely for each mobile communication device. 7. The mobile communication device according to claim 1, wherein said control means causes said information signal to be transmitted a plurality of times. 8. The mobile communication device according to claim 7, wherein said control means includes transmission intensity changing means for changing the transmission intensity of said transmission means, and sets the transmission intensity for each of said plurality of transmissions. 9. The mobile communication device according to claim 8, wherein said control means randomly sets a transmission intensity for each transmission. 10. The mobile communication device according to claim 1, wherein said timing setting means randomly sets said delay time.