JPS6083450A - Collecting method of dynamic state data - Google Patents

Abstract

PURPOSE:To collect dynamic state data at a high speed by varying and setting the number of time slots for the next time by a vehicle dynamic state display device on the basis of a calculated reception rate. CONSTITUTION:When a base station 2 sends a polling signal, area by area, the rate of the reception of a response from each mobile station 1 is calculated. Consequently, the number of divisions of time slots of the mobile station 1 is determined and indicated in the next polling. Numbers of time slots are given to mobile stations 1 in case of their congestion to decrease the probability of simultaneous calling among mobile stations, and a response is made while plural time slots are put together into the same time slot unless mobile stations are in the congestion state, thereby collecting dynamic state data at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention enables mobile stations (
Polling from the base station is used in a vehicle dynamic display device that collects empty vehicle data from dynamic data of radio taxis, etc., displays it on a display device such as a CRT, and issues a dispatch command from the base station based on the data. Depending on whether the proportion of responses from mobile stations (base station reception rate) is above or below a certain rate, the time slot for each mobile station is divided into multiple sections (multi-slots) or sub-sections based on polling from the base station. The present invention relates to a dynamic data collection method for each mobile station in which the mobile station is switched to a small slot.

In general, a distributed transmission method is mainly adopted as a vehicle dynamic detection method for wireless taxis.

As shown in Figure 2, the business area is divided into several to several tens of blocks (A), (B), etc., and a sign post is placed in the center of each divided block (A), (B), etc. (Small transmitter) (a) (b) Set... Vehicle (1)
When enters point (A1) of district (A) from outside the business area, it memorizes the position group signal from the nearest sign post (a),
Even if you pass point (A2), you will remain in the area (A2) for a certain period of time.
) holds the position group signal. Next, when moving to point (B1) in another district (B), the memory of the position group signal of the previous sign post (a) is erased and the new sign post (b)
The position group signal of is stored. In this way, each time vehicle (1) moves, vehicle (1) returns to the nearest sign post (
Position group signals a), (b), and so on are stored. When a vehicle allocation order is received, the base station sends out a polling signal specifying the district, and the vehicles (1) in the district 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 (1) leaves the business area from point (B2), the stored position group signal is erased at point (C1) after a certain period of time.

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 against this problem, as shown in Fig. 1, in response to polling signals, a group of 10 vehicles (10n + 1
), (Ion + 2), . . . Sequentially unique response times (1, , L□-2, . . . set in advance on a time-sharing basis)
) to prevent signal collisions (interference) caused by simultaneous calls.

However, even if the response time (time slot) of the mobile station to polling from the base station is 0.3 seconds, if there are, for example, 30 time slots, it will take approximately 30 seconds for the entire mobile station to collect data at the base station. It takes 10 seconds. In addition, when the response order is fixed, there are problems such as interference because multiple vehicles with the same response time, that is, the same time slot, gather in the same area6.Furthermore, if the response order is fixed, the order ( As a result, vehicles with earlier time slots were dispatched more quickly, making it impossible to issue average dispatch orders.

Therefore, in order to solve the above-mentioned problems, the present applicant has proposed that when a vehicle enters a specific area and receives the position group signal of the sign post in that area, the position group signal and the taxi meter are A timer is activated by the AND output with the signal when the signal is reached, and the time that the vehicle is in a waiting state in the area is counted, and this waiting time is polled with a time difference based on a certain period of time. (Characteristic curve in Figure 3)
1) or (■)) have already been proposed. To explain this Figure 3 in more detail, the horizontal axis shows the waiting time in a certain area. During this waiting time, when an empty car enters a certain district (A), it receives the position group signal of the sign post (a) of that district (A), and from that time the waiting time starts counting. If you enter the taxi in a state other than empty, the waiting time starts counting when the taxi meter reaches the car. The vertical axis indicates response priority. In this Figure 3, (■) is the time slot (priority order) setting curve for busy times, and (IF) is the time slot (priority order) curve for quiet times.
This is a setting curve. Of these, the time slot setting curve (1) during congestion will be explained first.

When taxis are crowded, there are 2 to 2 empty taxis.
In most cases, the vehicle will be in a rental state in 4 minutes. Therefore,
In the first setting curve (1) in Figure 3, the waiting time is 3 minutes to 3 minutes.
Minutes and 30 seconds is set as the standard time, and when the waiting time is shorter than that, the priority setting interval for responses to polling signals is increased by finer time intervals, for example 30 seconds, and when the waiting time is longer than the standard time, the corresponding Set priority setting interval to 1
Increase the time in sequence like minutes, 1 minute 30 seconds, 2 minutes, 3 minutes, etc.

As for the response priority, the standard time of 3 minutes to 3 minutes and 30 seconds is placed first, followed by 3 minutes and 30 seconds to 4 minutes and 30 seconds in second place, 2 minutes and 30 seconds to 3 minutes in third place, and so on. 4 minutes and 30 seconds to 5 minutes and io seconds is set in 4th place, 5 minutes to 2 minutes and 30 seconds in 5th place, etc., and so on alternately on the left and right around the reference time. If the waiting time exceeds a certain period of time, for example 15 minutes, there will be almost no empty cars, so all cars with a waiting time of 15 minutes or more will be parked at the 15th bus stop.
rank.

Next, the time slot setting curve (TI) during off-peak hours will be explained. During off-peak times, many vehicles remain empty and have long waiting times. Further, from the standpoint of taxi management, it may be desirable to give the taxi with the longest waiting time the highest response priority. In order to achieve this purpose, in the second setting curve (II), the response priority cylinder is set to 1 when the waiting time is 14 to 15 minutes, and thereafter, as the waiting time decreases by 1 minute, it is ranked 2nd, 3rd place,... set as 6, but 15
All items that have passed 2 minutes will be ranked 16th.

Whether it is the unique priority (time slot) shown in the first place, or the priority (1) (II) based on waiting time shown in Figure 3, Since it only determines the priority order, the base station collects data regardless of the reception rate of the base station based on calls from mobile stations, that is, the ratio of the number of responses received. Therefore, regardless of the size of the mobile station, the time required for collecting dynamic data at the base station is the same, and the number of responses may be extremely small, especially during off-peak hours. When the number of responding machines is small, it is not possible to shorten the time required for data collection.

The present invention was made in order to solve such a problem.The present invention calculates the reception rate of the past several times, and if the reception rate is above a certain level, the time slot of the mobile station is multi-divided. If so, the data can be collected at high speed when the reception rate is below a certain rate by making the response be made by dividing the time slot into small parts.

Hereinafter, the method of the present invention will be explained based on FIGS. 4 to 6. In FIG. 4(a), it is assumed that at 2 o'clock a certain area is specified and a polling signal is emitted in the congestion mode. In this busy mode, as shown in FIG. 4(b), data is collected based on the time-divided priorities (time slots) of mobile stations No. 1 to No. 16. The base station (2) collects data during this period and calculates the reception rate.

That is, the ratio of the number of received responses to the expected number of responses (mobile station time slot) 16 specified at the time of polling transmission is calculated. The reception rate is calculated by integrating this data collection twice. For example, this reception rate is 50%
If the mobile station exceeds the number, for example, it is determined that the empty mobile station is congested, and data collection is continued in the congested mode. If the reception rate is, for example, 25 to 50%, it is determined that the mode is normal mode, and the expected number of responses (time slots of the mobile station) is switched to eight. In other words, as shown in Fig. 4(c), the mobile station priorities are set as 1, 2.3, 4, etc., and a new priority is set as 1.2. Collect data.

If the reception rate is 0 to 25%, it is determined that it is a quiet mode, and the scheduled number of responses (time slots of the mobile station) is switched to four. In other words, as shown in Fig. 4(d), the mobile station priorities are set as 1 to 4.5 to 8, etc., and a new priority order of 1.2, etc. is set. Collect data.

Specifically, if each time slot is 0.3 seconds,
If the priority is number 16, it will be number 16 even in busy mode, and it will take 4.8 seconds to collect data once. If this becomes normal mode, it will be No. 8 and it will take 2.4 seconds, and if it goes to off-season mode, it will be No. 4 and it will take 1.2 seconds. Therefore, it is possible to collect effective data efficiently, and it is possible to give uniform dispatch orders to the entire army.

FIG. 5 is a block diagram of an apparatus for implementing the method of the present invention, and this FIG. 5 explains the case where time slots are set based on waiting time as shown in FIG. 3. In FIG. 5, (1) is a mobile station, (2) is a base station, and (3) is a sign post for each district (A), (B), etc.

The mobile station (1) has an antenna (
An antenna (5) that receives the position group signal emitted from the
), receiver (6), data demodulator (7), controller (8)
Equipped with etc. The data demodulator (7) is also coupled to a timer reset circuit (9), a priority determination circuit (14), a game h(1,0) and a dynamic data generation circuit (11) in the controller (8). has been done. a taximeter (12) is coupled to said timer reset circuit (9);
This timer reset circuit (9) is coupled to the priority determining circuit (14) via a timer (13). This priority determination circuit (J4) determines the priority based on the first characteristic curve (1) in FIG.
The priority order based on the characteristic curve (TI) is set in advance. This priority determining circuit (I4) divides into 16, 8, 4, etc. according to instructions from the base station (2).
It is coupled to a response time slot determination circuit (28) for determining in which mode of the split to respond.

Further, the response time slot 1 decision circuit (28) is connected to the dynamic data generation circuit (11) via the gate (lO), which closes after a certain period of time after the position group signal from the sign post (3) can no longer be received. combined. A car number setting circuit (15) for setting a car number using a switch for each car number is connected to the input side of the dynamic data generation circuit (11).

The output side of this dynamic data generation circuit (11) includes a data modulator (16), a transmitter (17), and a transmission/reception changeover switch (
29) to the base station (2).
8), and the transmitter (17) also has a microphone (19).
) are combined. A receiver (20) for receiving audio signals and polling signals from the base station (2) is also coupled to the transmission/reception switch (29), the audio signal is sent to the speaker (21), and the data signal is sent to the speaker (21). The data is sent to the demodulator (22).

This data demodulator (22) is connected to the dynamic data generation circuit (11).
) and the response time slot determining circuit (28).

The base station (2) is provided with a receiving antenna (23) and a transmitting antenna (23a) for communicating with the mobile station (1). Of these, the receiving antenna (23) is the receiver (24).
) is connected to a slot data reception recording unit (30) and a reception data processing circuit (31), of which the reception data processing circuit (31) is connected to a display device (25) such as a CRT. Said slot 1-data reception recording section (3
0) is a reception rate calculation circuit (32) and a reception rate accumulation circuit (3
3), through the congestion level determination circuit (34), the response slots 1 to 3
It is coupled to a mode indication circuit (35). Further, this response slot mode instruction circuit (35) is coupled to the reception rate calculation circuit (32), and is also coupled to the transmission polling data modulator (36) together with the operation section (27). This transmission polling data modulator (36) is coupled to the slot data reception and recording section (30) and the transmitter (26), and the transmitter (26) is coupled to the transmitting antenna (23).
a).

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

Assuming that a taxi (1) enters the receiving area of a certain area, the position group signal of the sign post (3) is transmitted to the receiver (6).
), the data demodulator (7) demodulates this data, and sends a signal to the timer reset circuit (9), gate (10), dynamic data generation circuit (11), and priority determination circuit (14). send. If a car enters the area with an empty car, the signal 9 from the sign post (3) is received, and if the car becomes empty after entering the area, the tough meter (12) will indicate that the car is empty. At the same time, the timer reset circuit (9) is activated and the timer (13) measures a new waiting time.

Based on this waiting time, the priority determining circuit (14)
Time slots are set according to either of the setting curves (1) and (u) in FIG. Specifically, for example, a curve (
In the case based on I), immediately after the waiting time subsides, the priority is 13th, and as the waiting time elapses, the priority is 13 every 30 seconds.
1.9.7.5.3 and the first in 3 minutes to 3 minutes 30 seconds
2.4.6.8.10
．． It has been moved down to 12.14, and those that have passed for more than 15 minutes will be ranked 15th in the ranking. In addition, in the case based on curve (II), the priority is 15th immediately after the waiting time is counted, and the priority is increased to 14, 13, 12, etc. every minute, and the waiting time is 14 to 15 minutes. Those that last more than 15 minutes will be ranked first, and all those that have been running for more than 15 minutes will be ranked 16th.

Here, the base station (2) operates the operation unit (27) to emit a polling signal specifying a specific area and response slot mode. This polling signal is 1, for example, in FIG.
), 100 bits are used to start the data, 8 bits are used to confirm the data, and the dynamic mode (empty car, rental car,
4 bits for specifying (forwarding, etc.), 2 bits for specifying response time slot mode, 16 bits for district code.
It consists of 4 bits for checking.

Note that the busy mode, normal mode, and off-peak mode are set using the 2 pins for specifying the response time slot mode. This polling signal is transmitted to the antenna (18) of the mobile station (1).
), is received by the receiver (20), and is sent to the demodulator (22).
The signal is demodulated and sent to the response slower l-determining circuit (28) and the dynamic data generating circuit (11). On the other hand, in the mobile station (1), the standby time output from the timer circuit (13) is sent to the open side and the priority order determination circuit (t4), and in this priority order determination circuit (14), (1) of FIG. Or (II), the priority changes at a predetermined time interval and the output is sent to the response slot determination circuit (28). The response time slot is determined by instructions based on the polling signal. In the case where the number of response time slots is instructed to be 16 by an instruction from the base station (2),
If the vehicle has had a waiting time of 2 minutes and 10 seconds, the priority determining circuit (14) will rank it 5th in the characteristic curve (1),
It ranks 13th when the characteristic curve is (n).

Here, when it is assumed that the number of response time slots is designated as 8, the number of response time slots is increased to 3rd place for characteristic curve (1) and 7th place for characteristic curve (II). Furthermore, when the number of response time slots is designated as 4 and is assumed to be 1), the number is moved up to the first place when the characteristic curve (1) is reached, and to the fourth place when the characteristic curve is A11 (II).

With the response time slot determined in this way, the dynamic data generation circuit (11) of the mobile station (1) where the area designation by the Bolin signal and the position group signal from the sign post (3) match. Vehicle dynamic data, mainly car number data and empty car data, are sent to a data modulator (
16) and is emitted from the antenna (18) via the transmitter (17). The data signal of this mobile station (1) is shown in Fig. 6 (
As shown in b), 100 bits are used to start the data, 8 bits are used to confirm the data, 4 bits are used to specify the dynamic mode, 16 bits are used for the district code, 12 bits are used for the car number, and 4 bits are used for checking. It is configured. This data signal is sent to the antenna (23) of the base station (2).
The vehicle number and movement are received by the dynamic data receiver (24) and processed by the received data processing circuit (31), and displayed on the display device (25).

At the same time, the received data is stored in the slot data reception recording section (30).
The signal is then sent to the reception rate calculation circuit (32). This reception rate calculation circuit (32) also inputs a mode signal to slot 1 indicating the designated number of expected responses, so the mobile station (1)
The reception rate is calculated based on the outgoing calls.

For example, if the number of designated time slots is 16 and the number of received data is 7, -Z-xlOO=43.75% is calculated.

b This reception rate is sent to the next integration circuit (33) and is integrated, for example, for two times.

Next, if the number of designated time slots is 16 and the number of received data is 5, the reception rate is -Lx too = 31.
25b%, which is also integrated by the integration circuit (33).

Since the accumulated average value is 37.5%, the congestion level can be determined based on this output! ! 8 (34), the degree of congestion is determined.

If the average reception rate is 50 to 100% as congested, 25 to less than 50% as normal, and 0 to less than 25% as quiet, the congestion degree judgment circuit (34) outputs a switching signal to normal mode (8 divisions). Then, a signal for instructing the mobile station (1) to divide the time slot into eight is output from the response slot mode instruction circuit (35). If the average reception rate is less than 0 to 25%, a signal is further output for instructing the time slot 1- of the mobile 5 station (1) to be divided into four.

As described above, the next response slot mode is determined based on the past two average reception rates.

In the two consecutive examples, the initial priority of the mobile station (1) was determined by the method based on the waiting time as shown in FIG. The present invention can also be applied to a time slot determined by a unique time slot set in advance. In this case, there is no need to calculate the waiting time in advance.
Circuit (9) and timer (13) are removed. The output of the taximeter (12) is then sent directly to the priority determination circuit (14) as shown by the dotted line, and this outputs the priority determination circuit (14) in which priorities are set according to unique time slots. It is in a state.

In addition, 1) In the first embodiment, the example of dividing the tie 11 slot of the mobile station is 16.8.4, and the number of times of integration of the reception rate is 2, but it is of course not limited to this. It is.

As mentioned above, when the base station polls each area, the tree invention calculates the reception rate received in response from each mobile station, and then calculates the number of time slot divisions for the mobile station for the next polling. As a result, when mobile stations are busy, the chances of simultaneous calls between mobile stations are reduced by giving multiple time slots to mobile stations, and when mobile stations are not busy, multiple time slots 1
By collectively responding to the same time slot 1-, dynamic data can be collected at high speed. It also has the effect of uniformly distributing vehicle dispatch orders to all troops.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of unique time slots during polling, Fig. 2 is an explanatory diagram of the distributed transmission method, Fig. 3 is an explanatory diagram of the response priority setting characteristic curve, and Fig. 4 is an explanatory diagram of data collection using tree invention. FIG. 5 is a block diagram for implementing the method according to the present invention, and FIG. 6 is an explanatory diagram of a polling signal. (1)...mobile station, (2)...base station, (3)...
Sign post, (9)...Timer reset circuit, (1
1)...dynamic data generation circuit, (12)...taxi
Meter, (13)...Timer, (14)...Priority (
time slot) determination circuit, (j5)...car number setting circuit, (25)...display device, (26)...transmitter, (27) operation unit, (28)...response time slot Determination circuit, (30)...Slot data reception recording section, (
32)...Reception rate calculation circuit, (33)...Reception rate integration circuit, (34)...Congestion level determination circuit, (35)...
Response slot mode indication circuit (36)...Transmission polling data modulator.

Claims (1)

[Claims] (1) In a method of collecting dynamic data for each mobile station at a base station based on polling from the base station, the number of time slots of the mobile station specified in the polling signal from the base station; The reception rate is calculated based on the number of mobile station responses based on the polling signal, and the number of mobile station time slots specified in the next polling signal is variably set based on the calculated reception rate. Characteristic dynamic data collection method. (2. The dynamic data collection method described in claim 1, in which the reception rate is calculated based on the average value of several responses received immediately before from the mobile station. (3) Claim 1 In paragraph 2 or paragraph 2, the time slot of the mobile station is set by operating a timer based on the position group signal of the sign post by district and the signal when the taxi meter becomes empty, which the mobile station receives. A dynamic data collection method in which the waiting time at a mobile station is counted and setting is made based on this waiting time. (4) In claim 1 or 2, the time slot of the mobile station is A dynamic data collection method that is fixedly set in advance for each mobile station.