JPS5890835A - Method and apparatus for communication of mobile body - Google Patents

Abstract

PURPOSE:To prevent the collision of communication of cars in a plurality of car tracks, by providing a car number transmitter at each car line, discriminating the track number on the car on which it runs, and detecting a vacant line signal corresponding to the discriminated track number. CONSTITUTION:An inlet section of a communication zone is provided with track number transmitters 11-13 at each car track. The track number of the track is discriminated with a signal from the transmitters 11-13 on a car, a specific vacant track signal is received from a transmitter-receiver 5 on road based on the car track number and the transmission/reception of a message is done with the transceiver 5 on road based on the vacant track signal. The discrimination of the car track number can optically be read on the car for characters, graphs and patterns displayed on a road.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a mobile transceiver mounted on a mobile body such as a car to perform communication between an on-vehicle transceiver and a road transceiver installed on the road and having a local communication area. The present invention relates to a body communication method and device. More specifically, for example, a transmitting/receiving antenna for a roadside transmitter/receiver is installed on the road, and communication is possible between the onboard transmitter/receiver and the roadside transmitter/receiver only during the period when the vehicle passes along the antenna. The destination, vehicle type, vehicle identification number, etc. are sent to the on-road transceiver, and the on-road transceiver also sends optimal route information,
This method aims to make the flow of vehicles smoother by sending various information such as safe driving information, public car priority information, and emergency information to the on-vehicle transceiver.

With this type of communication method for mobile objects, even on multi-lane roads with heavy traffic, communication can be easily carried out between all vehicles equipped with an on-vehicle transceiver and the on-road transceiver. It is hoped that this will be possible.

In order to achieve this goal, it is relatively easy to bury so-called loop antennas with a narrow communication area in the road surface to prevent two or more cars from entering the communication area at the same time. can do. However, since this loop antenna is buried in the road surface, it is often cut off during road construction, which poses many problems in terms of system maintenance.

In order to solve such system maintenance problems, it is conceivable to use a ferrite coil antenna installed on the road in an overhead type or side firing type instead of directly buried in the road surface. However, the problem with this ferrite coil antenna is that when the communication area is expanded, two or more cars enter the area at the same time, and the signals from the on-vehicle transceivers of these cars collide. That's a problem.

The present invention relates to a communication method that prevents collisions of multiple signals even if the communication area is expanded.As a method to avoid this collision, the on-road transmitter/receiver side transmits signals from the vehicle-mounted transmitter/receiver. There is already an idle line control technology that immediately stops signal transmission from other in-vehicle transceivers when a signal transmission is detected, and is used in car telephones and the like.

In this method, when a signal from the on-board transceiver is detected, a transmission prohibition pattern is sent out, and in other cases, an empty line pattern is sent out, and the on-board transceiver uses this pattern to determine whether the channel is free or not. This method detects and calls only when there is free time.

However, even with this method, collisions cannot be avoided if multiple vehicle-mounted transceivers attempt to start transmitting at the same time. In such a case, there is no response from the on-road transceiver, so the vehicle-mounted transceiver retries the transmission several times, and if it still does not work, the user can try again to avoid a collision. I have to. However, in local mobile communications, communications must be completed within a short period of time (several hundred milliseconds), and there is not much time available for retrying to avoid collisions.

Therefore, there is a need to use techniques that avoid collisions from the beginning.

The present invention has been made in order to solve the above-mentioned problems.A lane number transmitter is provided for each lane, the lane number in which the vehicle is traveling is identified by an in-vehicle transceiver, and this identified The present invention relates to a communication method for avoiding collisions by detecting empty line signals corresponding to lane numbers.

A first embodiment of the present invention will be described below with reference to the drawings.

First, the principle of the present invention will be explained based on FIGS. 1 to 4. In FIG. 1 showing the configuration of the communication system of the present invention and its relationship with roads, (1) is, for example, two lanes in one direction (1).
(1), one lane in the other direction (2), and a vehicle (2) traveling on this vehicle traffic road (1).
) is equipped with an on-vehicle transceiver (3) and an on-vehicle antenna (4). Further, a roadside transmitter/receiver (5) and a roadside antenna (6) such as a ferrite coil antenna connected thereto are provided on the shoulder of the vehicle traffic route (1), and a communication area ( 7) covers three lanes (1) (H) (110) as shown by dotted lines, and the directions in which vehicles can travel are indicated by arrows. Immediately in front of the direction are narrower lanes, each with individual lanes (1) (H) ([[another communicable area covering only D (8) /9) Ql and as identification information of the driving lane. For example, a simple battery-powered lane number transmitter aυ0 for transmitting an identification signal.
203 is buried in the road surface.

The on-road transmitter/receiver (5) and the vehicle-mounted transmitter/receiver 13) communicate, for example, using a message composed of multiple bits as shown in FIG. 2(1) as a transmission unit.
The modulation method is, for example, as shown in (2) in the same figure, using AM modulation in which each bit corresponds to the presence or absence of a signal, and other methods such as AM modulation, FM modulation, phase modulation, etc. You can also use .

Next, the principle operation according to the present invention will be explained in the transmission signals shown in FIG. 3(1) to TI, T7. T, is the driving lane (I) (1)
The idle line signals M1 to MI6 corresponding to the M1 to M16 signals (GO) indicate messages composed of a plurality of bits.

If the communicable area covers n lanes, the vacant line signal sequentially transmits n identifiable vacant line signals T, ~Tn based on differences in bit strings included in the vacant line signal. Send to. This embodiment shows the case of three lanes, so for example, the empty line signal T corresponding to lane (I)
, is 0101...01. The vacant line signal T corresponding to the lane (H) is 1111...11. The vacant line signal T corresponding to lane (2) repeatedly transmits three types of vacant line signals Tl + TI + Tm that can be identified by transmitting a bit string such as 011011...011.

Note that the vacant line signal can also include common information that is desired to be transmitted to all on-vehicle transceivers in addition to the lane specifying information.

Immediately before the communicable area (7), for example, a simple battery-powered lane number transmitter αυ (12 lanes is connected to the road surface), which covers one lane (I) ([) (to), However, these lane number transmitters aυα SH03 are embedded in lane number (I) 0101...01.lane (0101...01.
Regarding 1), 1111...11. Regarding lane (2), a continuous lane identification signal of 011011...011 is transmitted.

Immediately before a vehicle (hereinafter referred to as an equipped vehicle) (2) equipped with an on-board transceiver that is communicating and enters the communicable area (7), one of the lane number transmitters aυa or αken transmits a message. The vehicle recognizes the lane in which it is traveling by receiving the lane identification signal by the on-vehicle transmitter/receiver (3). The in-vehicle transceiver (3) that has recognized the lane reaches the communicable area (7) and receives the vacant line signal TI transmitted from the road transceiver (5).
* T1+ Transmission of messages from the in-vehicle transceiver (3) to the on-road transceiver (5) is temporarily suspended until an empty lane signal corresponding to the recognized lane is recognized from within the TI. When the reception of the corresponding idle line signal is completed, the in-vehicle transmitter/receiver (3) transmits the message.

After transmitting the vacant line signal, the roadside transceiver (5) waits for a message from the on-vehicle transceiver (3), but if the message does not come, after a certain period of time it transmits the vacant line signal corresponding to the lane in turn. do. If a message comes, it receives it and sends a response message according to the received message. This transmission/reception procedure may be performed multiple times.

When the transmission/reception procedure is completed, the roadside transceiver (5) returns to the state of transmitting the vacant line signal again, and transmits the vacant line signal corresponding to the next lane in turn.

Figure 3 (2) shows message communication when the vehicle (2) equipped with the vehicle enters the communication area # (1) while driving in the lane (1); Car (2) is in lane (1)
) and entered the communication area (7) from the front.
Figure (4) shows the message communication procedure when the equipped vehicle (2) enters the communicable area (7) while traveling in the lane (to). Figure 3 (5) shows the lane (■) (I
) (This shows the message communication procedure when three vehicles (2) equipped with #1 enter the communication area (7) of IID at the same time. Here, M6 is the vehicle-mounted transmitter/receiver ( 3
), and similarly M,. is M,
, Ml, are response messages corresponding to M1□, respectively.

When the in-vehicle transmitter/receiver (3) completes the prescribed procedure and completes normal communication, the in-vehicle transmitter/receiver (3) stops the reception function for a distance sufficient to pass through the communication area (7). It is possible to prevent unnecessary reception of necessary idle line signals and other messages.

If an erroneous message (M,...) is discovered during message communication as shown in Figure 3 (6),
To operate to recover from an error by receiving an empty line signal corresponding to the own lane that appears next without stopping the reception function, and then retrying message communication.

In order to identify the lane, K is not based on the lane number transmitter 0υas as shown in FIGS. 1 and 4, but is a pattern IJ4 on the road surface that is different for each lane as identification information of the driving lane, as shown in FIG. 5, for example. QS (Draw HJ and select the vehicle equipped with it (
2) passes over this, an optical lane identification device αη using a well-known photoelectric element as shown in Fig. 9 detects the pattern Q.
4) The lane may be recognized by reading Q5Ql.

Next, specific configuration examples of the lane number transmitter ++1) (I2 H1 on-vehicle transceiver (3) and on-road transceiver (5) will be described with reference to FIGS. 6, 7, and 8.

As shown in FIG. 6, the lane number transmitter QL)n2) is composed of an antenna (6), a transmitter QL single lane number generator, and 11 batteries (A). As shown in Figure 7, the in-vehicle transceiver (3) demodulates the radio waves received by the in-vehicle antenna (4) into digital signals, or conversely transforms them into digital signals and transmits them via the in-vehicle antenna (4). A transmitting/receiving unit QD that transmits as radio waves, a communication control unit (2) that performs serial/parallel conversion of data, a microprocessor (c) that processes received data and transmitted data, and stores programs and necessary data to control this. ROM (Read Only Memory) (Foundation) and RAM (Random Access Memory) (2!9, lane number storage part (to) which is a part of RAM, display part, destination code, request code, etc.) It consists of a manual setting device (to), a display section for these, an interface circuit between the manual setting device (to) and a microprocessor (to), and a power source (to) that obtains the various necessary voltages from the car's on-board battery. The communication control unit (2) may be built into a microprocessor or may be a standalone circuit. αη is an optical lane identification device used to optically identify lanes. Specifically, as shown in Fig. 9, a light emitting unit (31a) that illuminates the road surface (1) in order to read the identification information of the driving lane drawn on the road surface (1) and the light reflected from the road surface (1). It consists of a light receiving section (31b) that receives the light.
b) is coupled to said interface circuit.

As shown in FIG. 8, the on-road transceiver (5) includes a transceiver section (having almost the same function as the transceiver section Qυ of the on-vehicle transceiver (3)), a serial/parallel converter, and a microprocessor-1.
It consists of a ROMm, a RAMM, a modem unit for data transmission with a central computer, a communication control section, and a power source. And in the transmitting/receiving section),
A roadside antenna (6) made of a ferrite coil antenna or the like having a transmission output that covers a predetermined number of lanes is provided.

The ROMs 24) and 24) store various control programs depending on the type of the in-vehicle transceiver (3) and on-road transceiver (5), respectively, and these control programs perform the communication operations described above. It is something to do.

The serial/parallel converter (2) may be built into the microprocessor (2), or may be a separate circuit.

Figures 10 and 11 show the on-road transceiver (5) shown in Fig. 8 and the on-vehicle transceiver (3) shown in Fig. 7, respectively.
), and the operations of the on-road transceiver (5) and the vehicle-mounted transceiver (3) will be described below based on this flowchart.

As shown in FIG.
), it transmits one vacant line signal (T,) corresponding to lane (I), and enters the receiving state at (1,). If no message is received from the in-vehicle transmitter/receiver (3) even after the specified idle line signal period of 11 hours has passed (timeout t1 state)
To do so, proceed to (-,) and transmit one vacant line signal σ, corresponding to lane (1), and (already in the receiving state. Below, if there is no message from the on-vehicle transceiver (3) Similarly, after a period of 11 hours (a,), a vacant line signal (T,) corresponding to lane (2) is transmitted, and at (a6), the signal is in the receiving state.
Thereafter, this cycle is repeated, resulting in a situation as shown in FIG. 3 (1) described above.

In (-,), (-,) or (m6), when a message arrives ("?) -('to) t or (
Otori 1. ) to receive the message, and after receiving it, (”
a) Check whether there are any errors in , ("o) t or ("ta), and if there are no errors, (check).

If a response message is sent to a message received at (,,,) or (-,,) and an error is discovered -
immediately proceed to the next step (-,), (-,) or (a□). This operation is then repeated. on the other hand,
As shown in FIG. 11, when the in-vehicle transceiver (3) is activated, it first sets the lane number ■ in the lane number storage section (to) of the RAM@ in (b,). The reason for the lane number ■ is to enable communication even without a lane number identification signal when there is only one lane.

Next, in (b,), the reception state is entered, and in the next (b,), in the case of multiple single lanes, the lane identification signal immediately before the communicable area for the original message communication is transferred to the lane identification signal in the case of one lane. waits for reception of a free line signal. Here, the lane identification signals are of the same frequency in order to use a common transmitter and receiver, but
In order to distinguish it from an empty line signal, if the pit sea fence for each lane and the pit sea fence for each lane identification signal are the same as shown in Figure 12 m (2), the number of turns should be As shown in FIG. 12(1), there are far more lane identification signals than empty line signals as shown in FIG. 12(2). Of course, they may be distinguished by making the bit siege of the trigger and the bit siege of the lane identification signal completely different.

When a signal is received at (b,), the content is deleted at (b,). If it is a lane identification signal, the lane number in which the driver is passing is recognized based on the content of the pit sea fence, and the number is determined at (b,). Reset to N (ba) to enter the receiving state again and wait for reception of an idle line signal.If an idle line signal cannot be received after a certain period of time (time error)
, is considered to be a failure or damage to the on-road transceiver (5), so return to the first step (b,). When an empty line signal is received in (b,), it is checked in (b,) whether it is an empty line signal corresponding to the lane number. If the signal received at <ha is an idle line signal, that is, if the result in (b,) is NO, the process similarly proceeds to (b,). If a signal other than the vacant line signal corresponding to the lane number is received in (b8), return to (b6),
Until the vacant line mark/number corresponding to the lane number is received (b
,)~(b,), manipulate the sea fences back. If it is a vacant line signal corresponding to the lane number, the process proceeds to (be) and transmits a message. Once the message has been sent (
b. ) Wait for reception of a response message from the roadside transceiver (5) to the message sent to the destination. (b
,, ), and check whether the message is correct. If it is correct, communication has been completed, so do not make any unnecessary movements until it passes through the communicable area (force). bn) to stop the receiving function, and then return to the first step (bt).If no message is received at (bu) and an open line signal is received, return to step (b,), and if the message is incorrect If so, go back to step (b6) to retry. If no reception is received after 1 time in (bt.), it is a failure of the on-road transceiver (5), so go back to the first step (bl). Thereafter, the above operation is repeated.

The operating procedure of the in-vehicle transmitter/receiver (3) shown in Figure 11 is the same as the frequency used for original message communication and empty lane signals when recognizing lanes using lane identification signals from the road surface (1). This is an example of a case where the lane identification signal is also used as the frequency, but the lane identification signal may use a different frequency, or may use light instead of radio waves. If light is used, the optical lane identification device aη shown in FIG. 9 will be used.

Next, a second embodiment of the present invention will be described in detail.

In this second embodiment, the basic configuration shown in FIGS. 1 and 2 is the same as that of the first embodiment. The specific configuration will be explained in detail with reference to FIGS. 14 and 15, but in this second embodiment, as shown in FIG.
) The vacant line signal α, ) (F's) α, ) transmitted from ) has a different frequency for each lane (I) value) Q10. In other words, in the case of Fig. 13 (1), the on-vehicle transmitter/receiver (3)
This shows that there is no communication with the lane I.
The lane number transmitter 09 corresponding to lane #1 transmits an empty line signal of frequency (), the lane number transmitter a corresponding to lane ■ sends an empty line signal of frequency (F,), and the lane number transmitter corresponding to lane 11Nc transmits an empty line signal of frequency (F,). Aircraft 03 continuously transmits idle line signals for each frequency island.

Figure 13 (2) shows the case where the on-road transceiver (5) is expected to have the function of communicating with the on-vehicle transceivers (3) of three vehicles (2), and the on-vehicle transceiver recognizes the lane ■. machine (3
) shows the communication status with When lane ■ is recognized, the in-vehicle transmitter/receiver (3) tunes its transmitting/receiving function to frequency (F,), receives the vacant line signal at that frequency (F,), and sends a message at frequency α,). do. Frequency (Fl
), the roadside transceiver (5) returns a response message at frequency σ, ). During this time, the vacant line signals of other frequencies (Ft, (I's)) continue to be transmitted. Figure 13 (3) shows the three equipped vehicles that have recognized lane ■, lane ■, and lane ■, respectively. In-vehicle transceiver (3) of car (2)
This shows a situation where the two communicated at the same time. in this case,
The on-road transceiver (5) has a function that allows it to simultaneously communicate with the on-vehicle transceiver (3) of the three on-board vehicles (2). )
It becomes possible to complete communication independently for each.

Next, specific configuration examples of the in-vehicle transceiver (3) and the on-road transceiver (5) for realizing the operation of the second embodiment described above are shown in FIGS. 14 and 15.

As shown in Fig. 14, the on-vehicle transmitter/receiver (3) receives the frequency ("I) CF2 received via the on-vehicle antenna (4).
) α, ) and demodulate it into a digital signal, or conversely, convert it into a digital signal -
A transmitting/receiving unit (transmission) that modulates the frequency (Fl) (F,) (F,) and transmits it as a radio wave via the on-vehicle antenna (4) on a carrier of one frequency selected from the radio waves of the frequency (F,) (F,).
, a communication control unit (b) that performs serial/parallel conversion of data, a microprocessor (6) that processes received data and transmitted data and controls the frequency of the transmitting and receiving unit, and a program and necessary data for controlling this. ROM and RAM to store Lane number storage part-1 display part which is part of HlRAM (b), manual setting device (b) for inputting destination code, request code, etc., these display parts and manual It consists of an interface circuit between the setting device and the microprocessor, and a power source that obtains the various voltages required from the car's on-board battery. The device is an optical lane identification device for reading and maintaining lane markings drawn on the road surface, and as shown in Figure 9, it consists of a light emitting part (31a) that illuminates the road surface (1) and a light emitting section (31a) that illuminates the road surface (1). It consists of a light receiving section (31b) that receives reflected light from.

On-road transmission/reception* (5) is a transmitting/receiving unit (50×5
1 x 52), a serial/parallel converter (53 x 54) (55), which has exactly the same function as shown in Fig.
), ROM (57), RAM (58), and a modulation/demodulation device (59) for transmitting data with a central computer, etc.
), a communication control unit ('o), and a power supply (61).

The ROMs (43) and (57) store various control programs depending on the type of on-vehicle transmitter/receiver #(3) and on-road transmitter/receiver (5), and these control programs perform the communication operations as described above. It is something.

16 and 17 are operation flowcharts of the on-road transceiver (5) shown in FIG. 15 and the nine-curved transceiver (3) shown in FIG. ) and the operation of the on-vehicle transceiver (3) will be explained.

As shown in Fig. 16, when the roadside transceiver (5) is started by turning on the power, the frequency α corresponding to lane I, the frequency α corresponding to lane Similarly to the description of the first embodiment, when no vehicle (2) is approaching, the idle line signal continues to be transmitted intermittently. The situation is as shown in FIG. 13 (1). For example, when a vehicle (2) recognizes lane I and enters, it receives a message with the frequency of ) at step (C8), and if there is no error, the message is sent at step (C,). Send. This is the state shown in FIG. 13(2).

3 lanes (T) (1) The microprocessor (56) is programmed to perform parallel processing even if three vehicles (2) enter from the QID at the same time, so each vehicle can transmit and receive data in parallel. From the point of view of the sentry, processing is done completely in parallel.

On the other hand, as shown in Fig. 17, when the in-vehicle transmitter/receiver (3) is started, it first sets the lane number (■ in the lane number storage section) with (fl), so that the frequency of the transmitter/receiver section - changes to the lane number. The step (fl) is set to "F" corresponding to (2). The (fl) step is provided to enable communication even without a lane identification signal when there is only one lane.

Next, at ('2), the vehicle waits for a lane identification signal in the case of multiple lanes, and waits for an empty line signal at the frequency of ) in the case of one lane.

If an idle line signal arrives at (f3), a message is immediately received at frequency (F,) at CfT>.

When a lane identification signal is received at (f,), it is set in the lane number storage section - at ('I+), and the frequency of the transceiver (5) is set to the corresponding frequency according to the contents.

Next, in step (f6), an idle line signal of the set frequency is waited for.

If the idle line signal cannot be received even after a certain period of time t, it is assumed that a failure has occurred and the process returns to the first step (fl). When an idle line signal can be received at (f7), a message is immediately transmitted at ('a), and at (f9) a response message from the on-road transceiver (5) is waited for. In case of failure it will time out and the first step (fl)
However, normally messages can be received, so in that case, lock the reception with fl, stop the communication function for a certain period of time, and then return to the first step (fl). , repeat the operation again.

If the message from the equipped vehicle (2) is not correctly transmitted to the roadside transceiver (5), the response message cannot be received.
An idle line signal is received again. In that case, send the message again.

As mentioned above, the first
Example on-road transceiver (5) and vehicle-mounted transceiver (3)
The operating procedure is that the transmitting and receiving frequencies may be the same or different, but both require mutual communication, the transmitting and receiving frequencies are constant, each communication is processed serially, and the message communication is one Special processing in the case of 1 lane and completed in 1 time,
Partial relief in case of lane identification signal failure, various error determinations,
This is an example of a case having an idle line signal reception lock function.

On the other hand, the operating procedures of the on-road transceiver (5) and the on-vehicle transceiver (3) of the second embodiment shown in FIGS. 16 and 17 require mutual communication, and each lane has a different frequency. However, the same frequency is used for transmission and reception, message communication is completed in one time, and special processing in the case of one lane, partial relief in the case of lane identification signal failure, various error judgments, and empty line signal reception are possible. This is an example of a case with a lock function. However, the present invention is not limited to these examples, and various other changes are possible. Further, the lane identification function is not limited to methods using radio waves or light, but may also be possible using ultrasonic waves.

As described above, the present invention provides a method for performing transmission and reception between a roadside transceiver installed on the road and an in-vehicle transceiver mounted on a car only during a period when a coughing car passes within a communicable area of the roadside transceiver. The in-vehicle transmitter/receiver waits for the driving lane classification function, and immediately before entering the communicable area, uses the driving lane identification function to identify the lane number in which the car is traveling, and determines whether multiple vehicles are in the communicable area at the same time. When the vehicle enters the vehicle, the identified lane number is used to correctly complete transmission and reception with a plurality of vehicles. Therefore, even if the communicable area covers a large number of lanes, reliable communication operations are guaranteed for all vehicle-mounted transceivers that enter the communicable area at the same time.

[Brief explanation of drawings]

The figures show an embodiment of the mobile communication method according to the present invention.
2) are a bit string signal waveform diagram and a modulation waveform diagram of a message or single line identification signal, respectively, FIG. 3 is a time chart of a lane identification signal and a message during operation of the first embodiment of the present invention, and FIG. 4 is a lane identification signal. Fig. 5 is an explanatory diagram of lane identification using light, Fig. 6 is a block diagram of a lane identification signal transmitter, and Fig. 7 is a block diagram of the first embodiment of an on-vehicle transceiver. , FIG. 8 is a block diagram of the first embodiment of the on-road transceiver, FIG. 9 is an explanatory diagram of the optical lane identification device, FIG. 10 is a flowchart explaining the operation of the on-road transceiver in the first embodiment, and FIG. Figure 11 is the first
FIG. 12 is a flowchart explaining the operation of the in-vehicle transceiver in the embodiment. FIG. 12 is an explanatory diagram of the distinction between a lane identification signal and an empty line signal. FIG. FIG. 14 is a block diagram of the on-vehicle transceiver of the second embodiment, FIG. 15 is a block diagram of the on-road transceiver of the second embodiment, and FIG. 16 is a flowchart explaining the operation of the on-road transceiver of the second embodiment. Figure 17 is the 21st!
It is a flow chart explaining operation of an in-vehicle transceiver of an example. (1)...Vehicle traffic route, (2)...Automobile (equipped vehicle), (3)...Vehicle-mounted transceiver, (4)...Vehicle-mounted antenna, (5)...Road transceiver , (6)...Road antenna, (7)...Communication area, (8)(9)4.
...Communication area, (laQRI0'3...Vehicle transmitter/receiver, (1) (1) Q[)...Lane. Fig. 6 Fig. 7 Fig. 7 Floor 8 Fig. center copy, -ya Fig. 12 Fig. 13 Fig. 14 Fig. 15 Fig. center 1N buoy No. 16 wJ No. 17 Figure procedural amendment (voluntary) December 25, 1982 Mr. Haruki Shimada, Commissioner of the Japan Patent Office, Incident Indication, 1982, Patent No. 1, No. 187745, 2, Title of Invention: 1 Communication Method and Apparatus 3, Person Making Amendment, Relationship with the Case, Applicant 4, Agent Person B, @TE (by DFJ 3m, yo.) Change the text ``Prohibition of transmission'' on page 5, line 12 of the detailed statement of correction to ``Prohibition of transmission''.

Claims (6)

[Claims] (1) A method in which communication is possible between a roadside transceiver installed on the road and an in-vehicle transceiver mounted on a mobile body only during a period when the mobile body passes within a communicable area of the roadside transceiver, The vehicle-mounted transceiver receives driving lane identification information transmitted for each driving lane immediately before entering the communicable area, and then the driving lane identification information is recognized by the driving lane identification function of the vehicle-mounted transceiver. A communication method for a mobile body, characterized in that a specific idle line signal is received from a roadside transceiver based on the above, and this idle line signal is used as a standard for sending and receiving messages. (2) The identification information of the driving lane is the characters displayed on the road,
2. A communication method for a mobile object according to claim 1, characterized in that a driving lane is identified by optically reading this information, rather than from a figure or a pattern. (3) The driving lane identification information consists of weak radio waves transmitted from a driving lane identification transmitter buried in the road, and the driving lane can be identified by receiving these weak radio waves with an in-vehicle transceiver of a mobile object. A communication method for a mobile body according to claim 1, characterized in that: (4) The communication method for a mobile body according to claim 1, wherein the idle line signal is a pulse signal having a different bit string, which is sequentially and intermittently transmitted over a predetermined time interval. (5) A mobile communication method according to claim 1, wherein the idle line signals are pulse signals having different frequencies. (6) In a device that enables communication between a roadside transceiver installed on the road and a vehicle-mounted transceiver mounted on a moving object only during a period when the moving object passes within the communicable area of the roadside transceiver. , a lane number transmitter for transmitting an identification signal unique to the driving lane for each driving lane immediately before entering the communication area; A transmitter/receiver module that performs modulation and demodulation, a microprocessor that processes transmitted and received data, a communication control unit that is built into the microprocessor or is provided independently and that performs serial/parallel conversion of data, and a control program for the microprocessor, necessary data, and lane numbers. What is claimed is: 1. A mobile communication device characterized by comprising a memory for storing.