JPS6062254A - Vehicle dynamic monitoring method - Google Patents

Abstract

PURPOSE:To improve the reception rate of mobile data and to shorten a polling time by allowing a mobile station to answer by combining a peculiar time slot and a time slot based upon movement together, and also sending an answer suspension command signal from a base station when collected data attains to a specific quantity. CONSTITUTION:An operation part 27 is operated at the base station to send a polling signal which indicates a specific area. This signal is inputted to the antenna 18 of the mobile station 1 and received 20, and the signal is demodulated 2 and sent to a controller 8. The time slot determining circuit 14 of the controller 8 adds the peculiar time slot and time slot based upon the movement, and the resulting signal is sent to a mobile data generating circuit 11 through a gate 10. This circuit 11 sends the vehicle number data signal and mobile data signal of a vehicle from an antenna 18 through a data modulator 16 and a transmitter 17 according to a specific time slot. The data signal of the mobile station is received by a movement data receiver 24 through the antenna 23 of the base station 2 and the vehicle number and movement are displayed on a display device 25.

Description

[Detailed Description of the Invention] The present invention collects data on the dynamics of mobile stations (wireless taxis, etc.) by polling from the base station (e.g., empty cars, rental taxis, forwarding 5 closed stations, emergencies, premium charges, etc.). In a vehicle dynamic detection method that displays information on a CRT and manages it by issuing dispatch commands from the base station based on the information, polling time is The present invention relates to a vehicle dynamic monitoring method that shortens the time required.

Conventionally, the (+) semi-automatic method (manual setting method) and (2) distributed transmission method are mainly known as methods for monitoring vehicle dynamics particularly for taxis.

(1) As shown in Figure 2, the business area of semi-automatic taxis is divided into several to several tens of blocks (A), (B), etc., and numbers are assigned to each block. When a customer orders a ride, the base station presses the corresponding district button. Then, a district-specific polling signal is emitted. This signal is received by all mobile stations (taxi radios), but among them, if the driver has pressed the button for that area, it matches the polling signal, and the car is empty, the mobile station will send the taxi to the taxi. The number calls.

The base station receives this information, displays it, and issues a dispatch order from there.

(2) Distributed transmission method As above, the business area is divided as shown in Figure 2, and each divided block (A) (B)... has a sign boss in the center) (a) (b)... (small transmitter).

When vehicle (1) enters point (A1) of district (A) from outside the business area, it memorizes the position group signal from (a) (the nearest sign boss) and even if it passes point (A2), District (
Hold the position group signal of A). Next, when you move to point (B1) in district (B) of another signpost (b), the memory of the position group signal of the previous signpost (a) is erased and you move to the new signpost) (a). Memorize the signal.

In this way, each time vehicle (1) moves, vehicle (1)
Store the position group signals of (a) (b)... (the nearest sign boss). Here, when a dispatch order is received,
When a base station sends out a polling signal specifying a region, vehicles (1) within the region send back their vehicle numbers and dynamic data (vacant, rental, forwarding, etc.). The base station receives this information, displays it, and issues a dispatch order from there. When the vehicle leaves the business area from point (A2), the stored position group signal is erased at point (C1) after a certain period of time (for example, one minute).

As mentioned above, if you specify the relevant district and poll,
Vehicles in the area will return their vehicle numbers and dynamic data, but there are many vehicles in the area.

If these respond all at once, signal collision will occur, and the base station will not be able to obtain correct information.

As a countermeasure to this problem, as shown in Figure 1, all vehicles were
By dividing each device into groups and setting time slots to which response times (to ~ 1.t, ~ 2...) with unique time differences are assigned sequentially to each group, and when polling signals are received, these Usually, a method is used to prevent signal collision (interference) due to simultaneous calls by responding in a time slot.

However, during times of congestion, there may be multiple vehicles in the same area divided into groups, and if they make calls at the same time due to base station polling, interference will occur, which will reduce the collection rate of dynamic data. The problem was that it got worse.

In order to solve the above-mentioned problems, the present applicant provides a unique time slot for each mobile station and a time slot set according to the polling dynamics of the mobile station (for example, priority response order). A method has been proposed in which these two time slots are combined to increase the number of time slots for response, thereby reducing interference in the same unique time slot and preventing a drop in reception rate.

However, there is a problem in that as the number of time slots increases, the polling time becomes longer.

Therefore, in order to prevent the polling time from increasing using the method described above, the present invention checks the number of collected data at regular intervals, and when a certain requirement (a certain amount) is satisfied, immediately issues a response stop command. It is designed to shorten the polling time by emitting a signal.

Hereinafter, the method according to the present invention will be explained based on the drawings.

First, time slots unique to mobile stations and time slots based on dynamics will be explained.

■ As already explained with reference to Fig. 1, the unique time slot of a mobile station is 5 to 1 time slot for all vehicles under management.
Group 0 units and set a time difference for each group. For more details, for example, the total number of vehicles is 50,
Assuming that each group is divided into 5 units, (10
tL+1) car, (rL=0.1.2...) that is 1
．． 11.21.31.41. All car numbers are shown in Figure 1 (b)
has a time slot of % tO~, such that (to
Car number n+2), that is, car number 2.12.22.32°42, is shown in Figure 1 (C). The time slots are as follows: (xon+3) car, (10rL+4)
Car number... - Car number Ion is shown in Figure 1 (d) (e).
...12 to 8 like (f). t, ~41"7L~1~
It has rL time slots.

■ Next, time slots depending on the dynamics of the mobile station will be explained. Mobile station dynamic data includes empty cars, rental runs, forwarding, closed stations, emergencies, extra charges, etc., and when a car becomes empty in a certain area or enters a certain area empty, a timer counts the empty time. There is a waiting time caused by This waiting time is, for example, 10 to 15 minutes (as shown in Figure 3).
The vehicle with the dynamic state A) is given the first priority response order. Similarly, vehicles with a waiting time of 5 to 10 minutes (dynamic B) are given second place, and vehicles with a waiting time of 0 to 5 minutes (dynamic C) are given third place.
give rank A time slot is set for each of the dynamic data A, B, and C. As shown in FIG. 4, this time slot is the time (1, , -rL ) with a time interval longer than T, ~2. T2-9. Set it like...

Above 1. Set two time slots as in II,
When the station is crowded, only the method I is used to respond to polling, but when the station is crowded, methods 2 and 3 are combined to respond to polling, as shown in FIG. For example, if there is polling from the base station at time of To, then T
, ~2 is the time period in which vehicles belonging to dynamic A (for example, first in response ranking) respond, hereinafter T2~. Dynamics B
(2nd place), T3 to 4゛ or dynamic C (m3 place).

If the response ranking is set in this way, in the same district,
Even if several vehicles with the same unique time slot enter, the dynamics (
If the priority responses) are different, interference will not occur and the reception rate will improve.

However, if this method is adopted, although the reception rate is improved, the number of time slots increases by a multiple of the number of dynamics, so there is a problem that the polling time becomes longer.

In the present invention, when a base station receives a response signal based on a combination of two time slots in a polling signal,
This base station checks the number of collected data at fixed intervals, specifically every time the dynamics change, and every time the priority response order changes, and when the collected data satisfies a fixed quantity, it immediately issues a response stop request. This is a method in which a signal is issued to cause the mobile station to stop responding from then on. If this method is used,
Polling time can be greatly shortened while avoiding interference.

FIG. 6 is a block diagram of an apparatus implementing the method of the invention. In FIG. 6, (1) is a mobile station, (2) is a base station, and (3) is a sign post for each district.

The mobile station (1) has an antenna (
An antenna (5) that receives the position group signal emitted from the
), receiver (6), and data demodulator (power).

This data demodulator (power is also coupled to the timer reset circuit (9), game) (lot) and the dynamic data generation circuit (11) in the controller (8). The timer reset circuit (9) is connected to the time slot determination circuit (14) via a timer (13).

The input side of the time slot determination circuit (14) includes a unique time slot setting circuit (28) for setting a unique time slot of the mobile station, a polling order setting circuit (29), and the taximeter (t2). ) is connected to the output side, and the dynamic data generation circuit (10) is connected to the dynamic data generation circuit (10), which closes after a certain period of time (for example, 1 minute) after the position group signal from the sign post (3) can no longer be received. 11). A vehicle number setting circuit (15) for setting a vehicle number for each vehicle by a switch is coupled to the input side of this dynamic data generation circuit 01). On the output side of this dynamic data generation circuit (11), a data modulator θ
6) is coupled to the transmitting/receiving antenna α■ to the base station (2) via the transmitter 0'7), and a microphone is coupled to the transmitter a'7). A receiver (20) for audio signals and polling data signals from the base station (2) is still coupled to the antenna θ (to), and the audio signal is sent to the speaker (
21) and the data signal is sent to a data demodulator (23), two of which are coupled to a time slot determination circuit (14) and a dynamic data generation circuit.

The base station (2) is provided with a receiving antenna (231) and a transmitting antenna (23a) for communicating with the mobile station (1). Among these, the receiving antenna (231 is the receiver 04).
A display device such as a CRT (2 phrases and a data number check circuit (,S[]) are coupled through the CRT, and this data check circuit C30) is coupled to a polling transmitter (26), and this polling transmitter (ll! 6) is connected to an operation unit (2γ1) consisting of a keyboard, etc., for performing operations such as specifying a district, and the receiving antenna (23a).

Next, the operation of the above configuration will be explained.

Assuming that the taxi (1) comes within the reception range of a certain area, it receives the position group signal of the sign post (3), demodulates this data and sends it to the controller (8).

The dynamic data generation circuit 01) in this controller (8) includes:
A car number data signal from the car number setting circuit (C) and a dynamic data signal from the taxi note (12) are constantly input.

Here, at the base station (2), operate the operation unit (27) to
A polling signal is sent to a specific area. This polling signal, for example, as shown in FIG. 7(a),
100 bits for data start, 8 pits for data confirmation, 4 bits for specifying mode (empty car, rental run, forwarding, etc.), 2 bits for setting polling order, 16 bits for district code, 4 bits for checking. It consists of

Here, it is assumed that the polling signal specifies a response mode during congestion, switching, and a response mode based on a combination of a mobile station-specific time slot and a dynamic time slot. This polling signal enters the antenna of the mobile station (1), is received by the receiver (20), is demodulated by a data demodulator (2 signals), and is sent to the controller (8).

In the time slot determination circuit (I4) of the controller (8),
The unique time slot and the dynamic time slot are added to the dynamic data generation circuit (game) (10).
11). For example, in FIG. 4, if the mobile station whose unique time slot is t2 to S is empty and has the first priority response order, dynamic time slot 1. ~
This is the time slot at the position indicated by the symbol (P) between the two. Also, if the car is empty and the priority response order is 3rd, the code (2) in the dynamic time slots T3 to T4
It will be delayed to the position shown in . From the dynamic data generation circuit α1), the vehicle number data signal of the vehicle and the dynamic data signal are transmitted to the data modulator (16) and the transmitter a'7) according to the time slot determined as described above.
and is emitted from the antenna (18). This mobile station (
As shown in Figure 7 (1), the data signal in 1) is 100 bits for data start, 8 bits for data confirmation, 4 bits for mode specification, 16 bits for district code, and 16 bits for car number. It consists of 12 bits and 4 bits for checking. This data signal is sent to the antenna of the base station (2) (through the edge) to the dynamic data receiver (24).
, and the Toban and the current state are displayed on the display device (2). At this time, the display device fig. (25) shows the response order shown in FIG. The data of one mobile station (1) that responded is displayed in sequence.
At the base station (2), the collected data is checked by the data number check circuit C30 every time the dynamic state (priority response 11) changes, specifically every time T2 + "'3..." in Fig. 4. For example, when the collected data satisfies a certain quantity at 13:00, an output is output from the data quantity check circuit C30), and a response stop command signal is issued to each mobile station from the polling transmitter C26).The mobile station ( When this signal is received in 1), it is sent to the controller (8) via the receiver (20) and the data demodulator (2). In the controller (8), the polling order setting circuit (2) is cleared, and The dynamic data generation circuit α1) stops responding to dynamic data and vehicle number data.

As described above, the present invention increases the total number of time slots by combining the unique time slot of the mobile station and the dynamic time slot, thereby eliminating most of the interference and transmitting dynamic data. In addition to greatly improving the reception rate, when the base station collects a certain amount of data, it issues a response stop command signal and stops the mobile station from responding, eliminating unnecessary responses and shortening polling time. It is something.

[Brief explanation of the drawing]

Figure 1 is an illustration of the case where mobile stations are divided into groups, that is, unique time slots, Figure 2 is an illustration of the distributed transmission method, and Figure 3 is an illustration of the waiting time divided into fixed time intervals and priority response order set. FIG. 4 is an explanatory diagram of the case where a response is made by a combination of two time slots, and FIG.
FIG. 6 is a block diagram of a device for implementing the method of the present invention, and FIG. 7 is a diagram of a polling signal. (1) Mobile station, (2) Base station, (3)
,,・Sign post, (9)・Timer reset circuit,
(II)...Dynamic data generation circuit, (I2)...Taxi meter, (+3)...Timer, (+4+:
・・Time slot determination circuit, (+5) ・・Car number setting circuit, (25)・・Table: g<% llq, (2+9・
... Polling transmitter, (28) ... Unique time slot setting circuit, (3f1 + ... Data number check circuit. Patent applicant General Co., Ltd. 1 ゛ Agent Patent attorney Shun Furusawa - ° 1: 4 Patent Attorney Kano --, J Figure 1 Figure 2 Figure 1 Aggression C Kasuwhip B Motion 5A - Samurai Yukaku Punishment (Public) Figure 4 Figure 5

Claims (1)

[Scope of Claims] (1) A method for sequentially collecting dynamic data of mobile stations in a region by polling a region from a base station by providing time slots for responses from each mobile station, comprising: A unique time slot for each mobile station and a time slot set according to the dynamics at the time of polling of the mobile station are provided, and these two time slots are combined to respond, and the base station checks the number of collected data and meets certain requirements. A vehicle dynamic monitoring method in which a response stop command signal is issued when the above conditions are satisfied to cause a mobile station to stop responding from then on. (2. In claim 1, the time slot set according to the dynamics of the mobile station during polling is
A vehicle dynamic monitoring method in a mobile station, in which the waiting time after the mobile station becomes vacant is set based on a priority response order, which is divided into predetermined time intervals. (3) The method for monitoring vehicle dynamics according to claim 1 or 2, wherein the number of data collected at the base station is checked at every time slot set according to the dynamics.