JPS5839129A - Empty car response system for taxi radio machine - Google Patents

Abstract

PURPOSE:To grasp accurately numbers of empty cars, by calling the empty cars from a base station with an aural signal and encoding response signals in the empty cars and transmitting response signals time-differentially from the empty cars. CONSTITUTION:A base station calls empty cars with an aural signal, and a polling signal is transmitted when a press button is turned off at the end of calling. When a mobile station receives the polling signal, a timer is operated by the fall of this signal. Operating times t1-t7 of timers are different in mobile stations. When a response button is depressed in the mobile station to respond to the call signal, a signal obtained by encoding the car number of the mobile station is transmitted to the base station just when a corresponding time-out of operating times t1-t7 of timers is elapsed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an empty vehicle response system in a taxi radio device that enables efficient dispatch of wireless taxis.

In general, in the dispatch service of wireless vehicles, a base station communication center calls multiple vacant vehicles scattered in a required area using voice signals, requests a voice response (vehicle number) from the vacant vehicles, and The method used was to select an appropriate vehicle from among these multiple vehicles and issue instructions for dispatch.

However, according to this method, since the response to notify the car number from an empty car is made by voice, the dispatch staff at the base station communication center is burdened with having to distinguish between the car numbers of multiple cars without making mistakes. In particular, when multiple empty cars respond at almost the same time, it is difficult to hear the car number correctly due to mutual audio interference.

Another disadvantage is that the calls must be repeated.

Therefore, one object of the present invention is to eliminate the above-mentioned conventional drawbacks, provide a time difference for responses for each taxi-radio device of a mobile station, and encode the response signals, so that multiple responses can be generated at the same time. Avoids interference and is easy to use in base station communication stations.

The object of the present invention is to provide an empty car response system in a taxi radio device that can accurately display and record an empty car number.

According to the present invention, in a taxi radio that includes a receiving section and a transmitting section and communicates with a base station, the receiving section receives a voice call signal from the base station and polling corresponding thereto. Receive a signal.

and means for detecting a polling signal therein.

Based on the time point at which the detection of the port IJ signal ends,
Taxi as a mobile station - A timer that operates for a predetermined period for each radio, and by pressing a response button at any time within the operation period of the timer, the corresponding mobile station There is obtained an empty car response system characterized by comprising means for encoding the car number of and transmitting the encoded car number through the transmitter.

Next, an example of an empty vehicle response system according to the present invention will be described in detail with reference to two drawings.

FIG. 1 is a block diagram showing the configuration of a base station radio in an embodiment to which the present invention is applied, and FIG. 2 is a time chart for explaining the operation of the base station radio in FIG. Referring to these figures, the signal a of the circuit and the delay circuit 2
, a signal e delayed by time τ is generated, and O
It is added to the input of R gate 3. In OR gate 3, 2
The two inputs are logically summed and the output thereof is given to the transmission controller 4. The transmission controller 4 drives the transmitter 5 with its control output f while being supplied with the output of the OR gate 3. While the transmitting device 5 is being driven, a modulated voice wave generated by the micro to call an empty car is transmitted from the antenna 9 to the mobile station at two frequencies F1. The call has ended.

When the press button 1 is released, the press release detection circuit 7 detects that the press button 1 is released, and the polling signal generation circuit 8 is driven by the output pulse C thereof. The polling signal d obtained from the polling signal generation circuit 8 is sent to the mobile station via the transmitter 5.
Since the switching signal d must be given to the transmitter 5 within the time that the transmitter 5 is under drive control, it has a shorter time width Td than the delay time τ generated in the delay circuit 2 described above. There must be. On the other hand, the response signal from the mobile station received at frequency F2 from antenna 1o is transmitted to receiver 11.
The signal is then demodulated and applied to a decoder/display device 12 connected to its output side. The decoder/indicator 12 is
When response No. 5 containing the encoded car number is given from the receiver 11, it is decoded and displayed on the display. Alternatively, you can record it if necessary. Note that if the received wave is audio, it can be heard through the speaker 13 connected to the output side of the receiver 11.

FIG. 3 is a block diagram showing the configuration of a mobile station radio in an embodiment to which the present invention is applied, and FIG. 4 is a time chart for explaining the operation of the mobile station radio in FIG. Referring to these figures, when the receiving section 23 receives the voice paging signal and the subsequent polling signal sent from the base station via the antenna 21 and the duplexer 22, the paging signal among these signals is is heard by the speaker 24 connected to the output side, and the pooling signal is detected by the polling signal detection circuit 25.

This detected polling signal is applied to the first timer 26, starting it. The first timer 26 is set to operate only for a predetermined period for each radio device of the mobile station. The method for determining this period will be discussed later.

In this example, for convenience of explanation, the operation period is assumed to be t.

During this period t, a high level output as seen in the waveform 51 is taken out from the first 'timer' 26,
It is applied to one input of AND gate 27. on the other hand,
In order to respond to the base station because the mobile station is empty, if the response button 28 is pressed within the operating period of the first timer 26,
The signal j is applied to the second timer 29 to start it. The second timer 29 has an operating period equal to the operating period t of the first cardiac timer 26, but is set to be slightly longer. Therefore, a high level output as seen in waveform k is obtained on the output side of the second timer 29. This output is applied to the other input of the AND gate 27 and is ANDed with the previously added output l of the first timer 26.

The output t of the AND gate 27 is led to a car number signal generation circuit 30, and this circuit is driven by the pulse m generated at the fall of the signal t. By the operation of the car number signal generation circuit 30, one output provides a digitized car number signal to the transmitter 31 during the period shown by the waveform n, and the other output is applied to the control voltage generation circuit 32. Car number signal generation circuit 30
The control voltage generating circuit 32 that receives the operation output generates a control signal 0 for driving the transmitting section, and supplies this to the transmitting/receiving controller 34 via the OR gate 33. When the transmission/reception controller 34 receives the control signal from the OR gate 33.

The operation of the receiving section 23 is stopped and the transmitting section 31 is driven instead. As a result, the transmitter 31.

The vehicle number signal of the own mobile station is sent to the antenna 2 using the transmission frequency F2.
1 to the base station. Note that for voice calls, the f-res button 35 and microphone 36 are used as in the past.

In the above embodiment, the configuration and operation of the mobile station radio equipment have been explained, but in reality, there are often multiple empty mobile stations in the required area called from the base station. The figure is 1 example.

This figure shows the relationship between each timer setting and response time when there are seven empty mobile stations. As can be seen from this figure, mobile stations 1 to 7 have the operating periods of the first timer 26 of their radios set to be slightly different from t to t7, and therefore the timing of the boring signal received from the base station is Using the lower point as a reference, the timers 26 of the mobile stations 1 to 7 start operating at the same time, but the end points of their operations are staggered. In this way, even if each mobile station presses the response button inconsistently at the time indicated by the black frame in Figure 9, the car number signal will not be sent out until the end of each timer operation, so the base station will not be able to send the car number signal. Responses from mobile station 1 to mobile station 7 will be received in order,
It is possible to grasp the response status of empty vehicles without mutual interference.

Note that the operation of the response button is valid only within the timer operation period after receiving the polling signal.

This can be easily understood from the time chart in Figure 4. For example, assuming that the number of empty cars gathered in the required area is about 10 to 20, the timer's operating period is approximately 1 to 20, with the shortest period t.
It is determined within 2 seconds, and thereafter it is set to become longer in increments of 0.2 to 0.4 seconds.

In the example shown in Figure 5, the number of target mobile stations for one base station is within 10, but if the total number of mobile stations is significantly large, there may be individual Is it possible to set a time difference?

Alternatively, all mobile stations may be divided into several groups to several dozen groups, and time differences may be set for the mobile stations within each of these divided groups. In this case, in order to specify the group of mobile stations from the base station, ;f? A method is adopted in which a group code is included in an IJ signal and sent out, and the mobile stations of the corresponding group receive and identify the signal. If such a method is used, there will be multiple mobile stations with the same timer operation period, but since calls from the base station are made by specifying an area, the answering mobile station will be different. The number is smaller, and therefore the probability of response signals colliding at the base station is smaller. In addition, the boring signal referred to in the above explanation is a signal that is attached after the voice call signal from the base station and This name is given to a signal used to align the starting points for generating a response signal in a mobile station, so the name does not matter as long as it serves the same purpose. In addition, the above figures 1 and 3
Although a two-frequency breathtalk type radio device is used in fil of the figure, it goes without saying that it can also be applied to a single-frequency breathtalk type radio device.

As is clear from the above description, according to the two aspects of the present invention, a time difference is provided for responses for each radio.

By encoding the response signal, the vacant vehicle number can be displayed instantly and accurately at the base station communication center.

This makes it possible to use the already collected response status for requests that occur within a short period of time, which not only saves labor in dispatch operations, but also enables efficient dispatch processing. The effect obtained in this respect is significant.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a base station radio in an embodiment to which the present invention is applied, FIG. 2 is a time chart for explaining the operation of the base station radio in FIG. 1, and FIG. 4 is a block diagram showing the configuration of a mobile station radio in an embodiment to which the present invention is applied; FIG. 4 is a time chart for explaining the operation of the mobile station radio in FIG. 3;
The figure is a time chart showing the relationship between timer settings and response times in a plurality of mobile stations. In the figure, 1t35 is a press button, 2 is a delay circuit,
3.33 is OR dart, 4.34 is transmitting/receiving controller, 5,3
1 is a transmitter, 6.36 is a microphone, 7 is a press disconnection detection circuit, and 8 is a polling signal generation circuit. 9.10.21 is the antenna, 11.23 is the receiving section. 12 is a decoder/display device, 13.24 is a speaker. 22 is a duplexer, 25 is a polling signal detection circuit, 2
6.29 is a timer, 27 is an AND gate. 28 is a response button, 30 is a car number signal generation circuit, and 32 is a control voltage generation circuit. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. In a taxi-radio device that includes a receiving section and a transmitting section and communicates with a base station, the receiving section receives a voice paging signal from the base station and a subsequent polling signal; means for detecting a polling signal from a source;
Taxi as a mobile station - A timer that operates for a predetermined period for each radio, and by pressing a response button at any time within the operation period of the timer, the corresponding mobile station an empty vehicle response system, comprising means for encoding a vehicle number of the vehicle and transmitting the encoded vehicle number through the transmitter.