JPH0385928A - Data collection system - Google Patents

Abstract

PURPOSE:To attain data collection with real time performance by sending a data resulting from input information stored corresponding to a slot number processed at random through the said slot number after the reception of a polling signal and sending input information within a prescribed number of slots after the reception of the polling signal through a succeeding slot. CONSTITUTION:Switch information from an operation display device 4 is stored in a signal processing circuit section 11, while a polling signal from a base station is demodulated by a demodulation circuit 9, coded and discriminated further by a decoding circuit section 10 and fed to the signal processing circuit section 11. The signal processing circuit section 11 matches the slot timing to the polling signal and when the information input point of time is within a prescribed slot after the reception of the polling signal, the signal is sent in the succeeding slot to the slot with the information input. When the information input point of time is at the outside of a prescribed slot, a prescribed number of slots is processed at random and the result is stored, and the signal is sent through a slot whose number is obtained from random processing in prescribed slots after the reception of the polling signal. Thus, data collection with real time performance is attained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a system in which a base station and a large number of mobile stations are connected via a wireless link, and data transmission is performed between the base station and the mobile stations. This relates to a method for collecting mobile station data.

[Summary of the invention]

In a system where a base station and a large number of mobile stations are connected via wireless lines, if the base station attempts to collect data from all mobile stations sequentially, the data collection time increases as the number of mobile stations increases. becomes long, and real-time performance is lost.

The present invention aims to provide a data collection method with high real-time performance when the number of mobile stations is extremely large but the number of calls from each mobile station is relatively small. A mode is provided in which information is stored in correspondence with the numbers obtained by randomizing the numbers of a certain number of slots.

The data accumulated in this mode will be stored after receiving the polling signal.
The data is transmitted in the slots of the above numbers, and for information such as switch inputs input within a certain number of slots after receiving the boring signal, the data is transmitted in the slot following the input.

[Conventional technology]

Figure 2 shows the conventional data collection method.

Base station mode A is a mode in which data is transmitted from the base station to the mobile station, and mode B is a mode in which the base station collects data from the mobile station. In other words, line control of the wireless line is performed by the base station, and if there is data to be transmitted to the base station, the base station transmits the data, and when there is no data to be transmitted, ε the activation signal P is sent to collect the data of the mobile station. Transmit data, start up the mobile station, and collect data 〇The method of collecting data from the mobile station is to provide a dedicated slot for each mobile station, group several to several dozen mobile stations together into a block, and (
In FIG. 2, the number of machines accommodated in one block is 10.

) Data is collected one by one in block units by starting data collection.

When the base station completes data collection for one block, it sends its own data to the mobile station again, and when it is finished, it starts collecting data for the next block, cycling through the blocks and collecting the mobile station's data. collect.

Note that the mobile station stores information such as switch inputs,
Sends data to the base station using its own dedicated slot. Furthermore, the slots of the mobile stations are synchronized by the data collection activation signal P, and the timing of the slots of each mobile station is the same.

[Problem to be solved by the invention]

Conventionally, a base station collects data from a mobile station using the method described above, but it has a drawback of 9th order σ).

(1) Because each mobile station has a dedicated slot.

As the number of mobile stations increases, data collection time increases and real-time performance is lost.

(2) Since the mobile station transmits data in its own dedicated slot, if a transmission error occurs, the mobile station will not be able to transmit data until the next dedicated slot.
Furthermore, real-time performance is lost.

The present invention attempts to solve these drawbacks and realize real-time data collection. [Means for Solving the Problems] Fig. 1 shows a data collection method of the present invention. In the figure, the base station mode is the same as the conventional method (A is a mode in which data is transmitted from the base station to the mobile station, and mode B is a mode in which the base station collects data from the mobile station.The present invention The newly established mobile station mode C is a mode in which information such as switch inputs is stored on the mobile station side, and mode D is a mode in which information such as switch input is stored on the mobile station side.

This is the mode in which data is actually sent. In mode D, in addition to transmitting the data of the information accumulated in mode C, the data of the information input during the period of mode D is transmitted in the slot numbered next to the input slot number i. Note that the slots of each mobile station in mode D are synchronized by the data collection activation signal P and have the same timing as in the conventional system.

Unlike conventional systems, each mobile station does not have a dedicated data transmission slot, but any mobile station can transmit data in any slot.

Information in mode C is stored by randomizing slot numbers in mode D (slot 1 to slot 10 in FIG. 1), and data is transmitted in mode D slots with those numbers.

On the other hand, in mode A of the base station, an answerback signal is transmitted to the mobile station that has collected data.

As described above, in the system of the present invention, information such as switch input of the mobile station is transmitted in slots with randomized numbers in the data transmission mode of the mobile station.

Then, when there is no answerback signal for data collection from the base station, the slot number is randomized again and transmitted in the next mode D.

[Effect]

As a result, each mobile station receives information input at its own station.

It is now possible to transmit a boring signal within a fixed slot after receiving it from the base station, and the base station can collect data with high real-time performance.

〔Example〕

FIG. 3 shows an embodiment of the mobile station device of the present invention.

It is shown and explained in FIG. Incidentally, FIG. 3 shows the equipment configuration of the entire mobile station, and FIG. 4 shows the system of the main parts of the signal processing device.

In FIG. 3, an operation display 4 is used for inputting and outputting information, and has a display such as a switch or an LCD. Also, antenna 1. Radio 2 sends and receives signals to and from the base station (σ)
The signal processing device 3 processes signals from the operation display 4 and signals from the base station.

Explain the operation. Switch information input from the operation display 4 is stored in signal processing bags # and 3. - On the other hand, a polling signal from the base station is received by the antenna 1° and the radio device 2, and is input to the signal processing device 3. When the signal processing device 3 determines the polling signal, the signal processing device 3 transmits the accumulated information signal to the radio device 2. It is transmitted to the base station via antenna l. In addition,
Switch information is information that is input by turning on the switch when, for example, a mobile station passes a predetermined point. In FIG. is an input/output terminal with the operation display 4.

Explain the operation. The switch information input through the operation display 4 is input to the signal processing circuit section 11 via the input/output terminal 8 and the input/output circuit section 15, and is stored therein.

On the other hand, a polling signal &l[U! The signal is transmitted from the IM 2 via the signal input terminal 5 and is demodulated into a 1 0 baseband signal by the demodulation circuit section 9 , the code is read by the decoding circuit section 10 , and the signal is applied to the signal processing circuit section 11 . The signal processing circuit unit 11 identifies the received polling signal. Signal processing circuit unit] 1 matches the slot timing to this polling signal, so that the information input time such as switch input is set to a certain slot (81) after receiving the polling signal.
10 slots in the figure), that is, during the mode D period, the signal is transmitted in the slot next to the slot in which the switch information is input.

In addition, if the information input time such as switch input is outside a fixed slot, that is, during mode C, -constant slot numbers are randomized and accumulated, and 9 slot numbers in a fixed slot after the polling signal received next are stored. It operates to transmit a signal in the slot numbered by the randomization. The 10 baseband signals from the signal processing circuit section 11 are converted into codes by the encoding circuit section 13, converted into analog signals by the modulation circuit section 12, and then applied to the radio device via the signal output terminal 6. Further, the signal processing circuit unit 11 sends an activation signal to a control circuit 14 that starts transmission of the radio device, and sends a transmission control signal to the radio device 2 via the signal output terminal 7. Note that the analog signal and the transmission control signal are synchronized with the slot timing and are cycled once.

When the signal sent to the base station is received by the base station.

Since the reception answerback signal is transmitted, it is received through the same route as described above, and the switch information stored in the signal processing circuit section 11 is cleared.

If the answerback signal is not received even after a certain period of time has elapsed, the slot number is blanked/dumbed and the signal is transmitted again in the same manner as described above, and the process is repeated.

〔Effect of the invention〕

As explained above, according to the method of the present invention.

Even if the number of mobile stations increases, the data collection time can be shortened, and real-time data collection can be realized.

[Brief explanation of drawings]

FIG. 1 is a time chart for explaining the data collection method of the present invention, FIG. 2 is a time chart for explaining the conventional data collection method, and FIG. 3 is the configuration of a mobile station device according to an embodiment of the present invention. 4 are system diagrams of a signal processing device according to an embodiment of the present invention. l: antenna, 2: radio, 3: signal processing device. 4: Operation display, 5, 6.7: Connection terminal with radio equipment. 8: Connection terminal with operation display, 9: Demodulation circuit section. 10: decoding circuit section, 11: signal processing circuit section, 12: modulation circuit section, 13: encoding circuit section, 14: control circuit section, 15: input/output circuit section. Figure 1, Figure 2, Figure 3, Figure 4

Claims (1)

[Claims] 1. A base station and many mobile stations are connected via a wireless link, the base station transmits a polling signal, and the mobile station has a fixed number of slots in which the timing of each mobile station is matched by the base station's polling signal. In a method in which data is transmitted in synchronization with the slot and the data is collected at the base station, the mobile station side receives data from outside the fixed number of slots for transmitting data and the last slot among the fixed number of slots. For information input, the numbers of the above-mentioned fixed number of slots are randomized and accumulated as data of the number obtained, and after receiving the polling signal, the accumulated data is transmitted in the slot of the above-mentioned number, and after receiving the polling signal, A data collection method characterized in that when information is input within a certain number of slots excluding the last slot, the data is transmitted in the slot following the input slot.