JP3121431B2 - Data collection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a system in which a base station collects data from mobile stations in a radio system including a radio base station and a plurality of radio mobile stations.

[0002]

BACKGROUND OF THE INVENTION mobile radio system, there is a system for transmitting data between the mobile station F ₁ to F _n as the base station E and a plurality of the FIG. When the system is configured with a single-frequency radio frequency that can be used in such a system, a data collection method as shown in FIG. 5 is generally employed. FIG. 5 shows a time chart of the data collection method by the polling method. The mobile stations F _{1 to} F _n are divided into a plurality of groups in advance, and data is transmitted in what number slot of each group for each mobile station. Decide what to do. That is, a fixed slot is allocated to every mobile station for each group. As shown in FIG. 4, the base station E is a communication control device 4a,
Radio 4b, the path of the antenna 4c, transmits a polling signal P ₁ to call the first group. Mobile stations F _{1 to} F
_n, the polling signal P ₁ is transmitted to the antenna 4
d, The signal is received by the wireless device 4e and passed to the signal processing device 4f. If the signal processing device 4f is set to the _{1st to} 20th car, the signal processing device 4f uses the slot number of its own station and the data d1 to d.
₂₀ is transmitted to the base station E via the radio 4e and the antenna 4j. Data d ₁ to d of the base station E is the mobile station F ₁ to F _20
20 is received by the antenna 4c and the wireless device 4b and passed to the communication control device 4a. The communication control device 4a receives the data d ₁
Performs processing to d _20, transmission data from the base station E side d
a, and transmits the db, it transmits a polling signal P ₂ next call the second group, to collect data d ₂₁ to d ₄₀ of from the same to 21 to 40 car. Base station E and mobile station F
₁ to F _n performs repeatedly collect data by the above, after the base station E is ended polling last group is a way to poll again from the first group,
Data collection of the mobile stations F _{1 to} F _{n and} the mobile station F from the base station E
Transmitting data for the ₁ to F _n.

[0003]

As described above, as described above,
In the conventional method, since a method of allocating a fixed slot in all mobile stations, the mobile station F ₁ to F _n number data acquisition time from the entire mobile station is much becomes long, real-time is lost. Further, since the mobile stations F _{1 to} F _n transmit data in fixed slots, if a transmission error occurs, the data transmission waits until the next slot of the own station comes, and furthermore, real-time transmission is performed. Sex is lost. SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks so that data can be collected from a mobile station at a base station in real time, and congestion of data transmission, that is, the concentration of data transmission is small and the reliability of data transmission is high. To provide a data collection method.

[0004]

According to the present invention, a base station is provided.
And multiple mobile stations, and the base station transmits mobile station data.
In the wireless data collection method for wireless collection, (a) the base
The station periodically transmits an activation signal to each mobile station,
Divided into a predetermined number of multiple slot sections following the start signal
Data transmission for each mobile station in the specified mobile station transmission section
(B) out of all mobile stations, the mobile station
The mobile station whose information is input within the transmission section is transmitted to the mobile station.
The above information is entered among a plurality of slot sections that make up the section.
The base station in the next one slot interval after the input
And (c) the mobile station transmission section of all mobile stations.
The mobile station to which the information has been entered outside or outside the area records the entered information.
Remember, multiple slot sections in the next mobile station communication section
Randomly selected one slot section and selected
Transmitting data to the base station in the slot section, and (d)
Receives data from mobile station that transmitted data to the base station
Said base station returns a response signal to the mobile station,
(E) the mobile station that has transmitted data to the base station,
If a response signal from the station is received and identified, transmission after that
Stop, and if the above response signal cannot be identified,
Until is identified by reception, each subsequent mobile station transmission
One slot is randomly selected from a plurality of slot sections.
Select a lot section, and in the selected slot section
Retry transmission to the base station;
A line data collection scheme is provided. The wireless data collection of the present invention
FIG. 4 illustrates the configuration of a base station and a plurality of mobile stations in a centralized system.
Have been. FIG. 1 shows the above processing of the mobile stations F _{1 to} F _{n according to} the present invention.
FIG. 4 is a configuration diagram of a signal processing device 4f that performs processing , including an input device A for inputting information to be transmitted to the base station E, such as an operation state of the own station.
Activation signal receiving apparatus B which receives the activation signal P to start the data transmission to the mobile station F ₁ to F _n from base station E, and set the transmission slot period by a signal from the activation signal receiving apparatus B (selected Te) data (dx, the data transmitter transmits the dy, etc.) C, the base station E to the transmitted data
Receiving response signals from (ax, ay, etc.) is made up of the response signal receiving apparatus D for receiving. With these device configurations,
Each mobile station performs the above-described processing.

[0005]

DETAILED DESCRIPTION OF THE INVENTION The present invention, to the base station from the mobile station F ₁ to F _n
Focusing on random occurrence of information transmission requests
And there is no fixed slot for each mobile station.
Control all mobile stations to be able to transmit data for a certain period of time.
Periodically sends a start signal to all mobile stations,
The mobile station to which the information has been input receives data in the transmittable state.
Send data to the base station and disable data transmission after the specified time
The mobile station to which the information is input in a state is stored with that information.
Data is sent when the next data can be sent.
Control so that That is, (a) the base station
A start signal is periodically transmitted to the mobile station, and the start signal
Movement divided into a predetermined number of multiple slot sections
Data can be transmitted to each mobile station in the station transmission section
(B) within the mobile station transmission section of all mobile stations.
The mobile station whose information is entered in the mobile station constitutes the mobile station transmission section
When the above information is input among multiple slot sections
Data to the base station in one slot interval following the point
Send. (C) Out of all mobile stations, information outside the mobile station transmission section
The mobile station to which the information has been input stores the input information.
Out of multiple slot sections in the mobile station communication section
Randomly select one slot section and select the selected slot
(D) transmitting data to the base station in the section,
Said data received from the mobile station that transmitted data to the station
The base station returns a response signal to the mobile station . (E) the above
The mobile station that has transmitted data to the base station receives a response from the base station.
When the answer signal is received and identified, the transmission after that is stopped,
If the above response signal cannot be identified, the response signal is
During the period until each mobile station is transmitted.
One slot section at random among a plurality of slot sections
And the base station in the selected slot section
Retry transmission to Referring to FIG. 1, information transmitted from the mobile stations F _{1 to} F _n to the base station is input from the input device A to the data transmission device C. The data transmission device C
Encoded information input from the input device A, if the received activation signal P is at the activation signal receiving apparatus B, the slot District
Set the interval (select) and send the data. The transmission by the data transmission device C is performed in a mobile station transmission section provided for a fixed time after receiving the activation signal P. If the transmission station is out of the mobile station transmission section, the transmission data is stored, and then the startup is performed. When the signal P is received, a slot section is randomly set and transmitted. The response signal receiving device D receives a response signal indicating that the transmitted data has been received by the base station E. If the response signal is received, the data transmitting device C
Signal to stop the next transmission. On the other hand, if the response signal is not received by the response signal receiving device D, no signal is sent to the data transmitting device C, and the data transmitting device C performs data retry transmission.

[0006]

FIG. 2 is a system diagram of a mobile station according to an embodiment of the present invention, and FIG. 3 is a time chart of a data collection method according to the embodiment of the present invention. This will be described below with reference to both figures. Base station E
Transmits an activation signal P for causing the transmitting data to the mobile station F ₁ to F _n. Mobile station F ₁ to F _n receives the activation signal P antenna 4d, in radio 4e, adding the received output to the signal processing signal 4f. The signal processor 4f is a modem 2
a, the received output is demodulated, and a decoding
Pass to g. Decoding unit 2g converts it into data, the control signal identifying unit 2h, as identified with the activation signal P, and generates a slot S ₁ to S _m in slot generation unit 2f.

On the other hand, information to be transmitted to the base station E is input to the input unit 2.
d to the data generation unit 2c
Is converted to data. If the input time of the input information is within the range that can be transmitted in the mobile station transmission section, the data is converted into a code by the coding unit 2b, and the slot time at the input time is converted.
In the next one slot interval, the signal is converted into a modulated signal by the modem 2a, and the data is transmitted to the base station E by the radio 4e and the antenna 4d. The radio 4e is controlled to a transmission state by the slot generation unit 2f and the transmission control unit 2e. The example in FIG. 3 shows that, in the case of the mobile station F _X , when the information kx is input in the slot S ₇ , the data dx is transmitted to the base station in synchronization with the slot S ₈ .

If the information input is outside the mobile station transmission section and cannot be transmitted, the information input from the input unit 2d is stored in the data generation unit 2c after being converted into data. Then, when the next start signal P is received, _one of the slots S _{1 to} S _m is randomly set, and the data dy is transmitted to the base station E in the same manner as described above. In the example of FIG. 3, in the case of the mobile station F _Y , the information ky is input in a section where transmission is not possible, and indicates that data ky is transmitted to the data dy base station in the slot S ₄ of the next transmission section set at random. I have. Note that, when the information input is performed in the last slot of the data transmission section, it is handled in the same manner as when the information input is performed in a range where transmission is not possible.

The response signal identification unit 2i identifies the reception of the response signal ax or ay received at the base station E by the data dx or dy transmitted from the own station, and responds to the data dx or dy transmitted by the own station. If the signal ax or ay is identified, the subsequent transmission of the data dx or dy is stopped. If the response signal ax or ay to the data dx or dy transmitted by the own station cannot be identified, at the time when the next start signal P is received, _one of the slots S _{1 to} S _m is set at random and the data is set. The retry transmission of dx or dy is performed, and the retry transmission is performed a specified number of times until the response signal ax or ay is received. Further, the mobile stations F ₁ to F ₁
Data dd to be transmitted to _n is a response signal ax or ay
Is transmitted, and then the activation signal P is transmitted. Note that, for simplicity, this description is performed by transmitting one data each.

[0010]

As described above, according to the method of the present invention, it is possible to transmit data of a mobile station, for which information needs to be transmitted, in real time, and to confirm reception at a base station by a response signal. Therefore, reliable data transmission becomes possible. Also, since the data transmission section from the base station and the data transmission section from the mobile station are time-divided, data transmission from the base station and data transmission from the mobile station do not become congested. Moreover, since the data transmission of the mobile stations is performed in synchronization with the slot, congestion of data transmission between the mobile stations is reduced as compared with the method of transmitting data at random.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a mobile station according to the present invention.

FIG. 2 is a system diagram of a mobile station according to an embodiment of the present invention.

FIG. 3 is a time chart of a data collection method according to the embodiment of the present invention.

FIG. 4 is a system configuration diagram.

FIG. 5 is a time chart of a conventional data collection method.

[Explanation of symbols]

A input device B activation signal receiving apparatus C data transmitting apparatus D response signal receiving apparatus E base station F ₁ to F _n mobile stations 2a modem 2b coding unit 2c data generation unit 2d input unit 2e transmission control unit 2f slot generation unit 2g decoding part 2h activation signal identifying unit 2i response signal identifying unit 4a communication control device 4b, 4e radio 4c, 4d antenna 4f signal processing device P activation signals ax, ay response signal dd base station transmission data S ₁ to S _m slots kx, ky input information dx, dy mobile station transmission data P _1, P ₂ polling signal d ₁ to d ₄₀ mobile station transmits data da, db base station transmits data

────────────────────────────────────────────────── (5) References JP-A-59-40740 (JP, A) JP-A-60-187154 (JP, A) JP-A-59-165545 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H04B ^7/ 24-7/26 H04Q ⁷ /04-7/38 H04J 3/16

Claims (1)

(57) [Claims] In a wireless data collection system comprising a base station and a plurality of mobile stations, wherein the base station wirelessly collects data of the mobile station, the base station periodically transmits an activation signal to each mobile station.
Then, after the start signal, a predetermined number of slot sections
In the mobile station transmission section divided into
Data transmission is enabled , and information is input within the mobile station transmission section of all mobile stations.
The mobile station that has sent the mobile station
Of the next section of the
In the mobile section, data is transmitted to the base station.
The mobile station stores the input information, and the next mobile station communication section
In one of the slot sections randomly
And select the base section in the selected slot section.
Transmit data to the station and receive data from the mobile station that transmitted data to the base station
The base station returns a response signal to the mobile station, and the mobile station that has transmitted data to the base station transmits the response signal from the base station.
If the response signal is received, the transmission after that is stopped.
If the response signal cannot be identified,
During the period until the mobile station is identified,
One slot at random among a plurality of slot sections
Select a section, and in the selected slot section,
A wireless data collection method characterized by retry transmission to a local station .