JPS62105544A - Data transmission system - Google Patents

Abstract

PURPOSE:To transmit accurate data by sending the number of times of successive data transmission to the opposite station by utilizing the frequency of a tone signal and making the number of times of successive data transmission judged on a transmission and a reception side. CONSTITUTION:When transmission from equipment A to equipment B is performed, transmitted waves from the A and B are received firstly and a reception part 4 detects the intensity of an electric field from B through a transmission/reception common device. A control part 6 controls an encoder so as to increase or decrease the number of times of successive data transmission according to whether the received electric field is intense or not, thereby generating a data signal. Further, a toner signal generation part is also controlled to output a toner signal of frequency corresponding to the number of times of successive transmission before the data signal of the encoder 5, so that the signal is transmitted to the equipment B through a transmission part 3 and the transmission/reception common device 2. The equipment B detects the frequency of the toner signal by a tone detector 18 and sends the number of times of successive data transmission corresponding the frequency to a decoder 17. The decoder 17 receives data corresponding to the number of successive transmission automatically on the basis of it and analyzes the data. Transmission from the equipment B to the equipment A is the same. Consequently, accurate data transmission is performed through this constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system for transmitting and receiving data signals using a wireless transceiver.

[Conventional technology]

Conventionally, when transmitting and receiving data signals with a wireless transceiver, and when changing the number of consecutive data transmissions depending on the strength of the electric field between the stations transmitting and receiving data, the received electric field strength detection obtained by the receiver was used. The number of times the data is sent is determined based on the signal, the data encoder composes and sends the data signal, and at the same time, the side that receives the data signal also detects the received electric field strength and determines the number of consecutive times the data is sent. It controlled the decoder.

[Problem that the invention seeks to solve]

In the conventional data transmission system described above, information on the number of consecutive transmissions is sent to the data decoder using a received field strength detection signal, so the relationship between the field strength and the number of consecutive transmissions must be obtained through experiments in advance as data. Furthermore, if there is a difference in the timing of detecting the received electric field on the data signal sending side and the detection timing on the data signal receiving side, and the electric field strength suddenly changes, the number of continuous transmissions determined by each control circuit may be different. There are drawbacks that make a difference.

[Means for solving problems]

The data transmission wireless transceiver system of the present invention includes a tone signal generating section that generates a tone signal of a frequency corresponding to the number of consecutive transmissions of the data signal to be transmitted, and outputs it before the data signal output from the data encoder; The device includes a tone detection unit that detects the frequency of a tone signal from a transmission wave received from a wireless transceiver on the side and sends the number of continuous transmissions of a data signal corresponding to this frequency to a data decoder.

In this way, by sending the number of consecutive data transmissions to the other station using the frequency t2 of the tone signal, there is no difference in the number of consecutive data transmissions determined by the sending and receiving sides, and accurate data transmission is possible. can be done.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the data transmission system of the present invention.

The data transmission system of this embodiment includes a wireless transmitter/receiver mA and a wireless transmitter/receiver B. The wireless transceiver A (B) is
The antenna 1 (11), the transmitter 3 (13), the duplexer 2 (12), the data encoder 5 (15), and the data decoder 7 (17) receive the data signal and transmit the received electric field. A receiving section 4 (14) detects the intensity and generates a detection signal, and a control section 6 (
1B) and a tone signal of a frequency corresponding to the number of consecutive transmissions of the data signal to be transmitted.
A tone signal generator 9 (1θ) outputs before the data signal output from 5) and a wireless transceiver B (A
) is provided with a tone detection section 8 (18) that detects the frequency of the tone signal received from the source and sends the number of continuous transmissions of the data signal corresponding to this frequency to the data decoder 7 (+7).

Next, the operation of this embodiment will be described for the case where a data signal is transmitted from wireless transceiver A to wireless transceiver B.

% When transmitting a data signal from wire transceiver A to radio transceiver B, radio transceiver 41! At A, first, a transmission wave from a wireless transceiver B is received by an antenna l, and is inputted to a receiving section 4 through a duplexer 2. In the receiving section 4, the wireless transceiver B
Detects the electric field strength from and sends a detection signal to the control unit 6.

In accordance with the first detection signal, the control unit 6 decreases the number of consecutive data transmissions when the received electric field strength is strong, and increases the number of consecutive data transmissions when the received (S) electric field strength is weak. A control signal is sent to the data encoder 5. In the data encoder 5, a data signal is formed by the control signal from the control unit 6.Furthermore, the control signal powered from the control unit 16 is also input to the tone signal generation unit 9, The signal generator 9 outputs a tone signal with a frequency corresponding to the number of continuous transmissions before the data signal output from the data encoder.The tone signal and the data signal are sent from the transmitter 3 through the duplexer 2 to the antenna 1 to the wireless transceiver. Sent to B.

In the wireless transceiver B, the transmitted wave from the wireless transmitter/receiver A is received by the antenna 11, and transmitted through the duplexer 12 to the receiver 14.
is input to. The receiving section 14 demodulates the received wave and outputs it to the data decoder 17 as well as to the tone detecting section 18 which detects the frequency of the tone signal sent to the data signal. The tone detection unit 18 sends the number of times of data transport according to the frequency of the tone signal to the data decoder 17 as a control signal. The data decoder 17 automatically receives data according to the number of continuous transmissions based on the control signal sent from the tone detection section 18, and analyzes the data.

Similarly, when transmitting a data signal from radio transceiver B to radio transceiver A, in radio transceiver B, the control unit 14 obtains a signal obtained by detecting the electric field strength from radio transceiver A, which is obtained by the receiving unit 14. The control unit 16 determines the number of consecutive transmissions based on No. 4g that detects the electric field strength from the wireless transceiver A, and the data encoder 15 configures data, and a tone signal with a frequency corresponding to the number of consecutive transmissions is sent to the tone signal generator. It is output from I9 and sent before the data signal. These signals are sent from the transmitter 13 through the transmitter/receiver duplexer 12 and from the antenna 11 .

In the wireless transceiver A, the received wave is demodulated by the receiving section 4, and the data decoder 7 receives the data by the number of consecutive transmissions according to the frequency of the tone signal detected by the tone detecting section 8, and analyzes the data.

〔Effect of the invention〕

As explained above, in the present invention, by transmitting the number of consecutive data transmissions to the other station using the frequency of the tone signal, the number of consecutive data transmissions determined by the sending side and the receiving side does not differ. This has the effect of allowing accurate data transmission.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the data transmission wireless transceiver system of the present invention. ], 11... Antenna, 2.12...
・・Sending/receiving device. 3.13... Transmission section, 4.14...
...Receiving section. 5.15...Data encoder. 6.16...Control unit. 7.17...Data decoder. 8.18...Tone detection section. 9.18...Tone signal generator. Patent Applicant: Japan; $ Denki Co., Ltd. Antenna Iris (Chupengei Image Ju A No. 1. Antenna Wireless Connection Machine B 1 Fig.

Claims (1)

[Claims] The number of consecutive transmissions is determined based on the reception field strength detection signal obtained by the receiver, the data encoder composes and sends a data signal, and the side receiving the data signal also determines the number of continuous transmissions based on the reception field strength detection signal. In a data transmission system in which data signals are sent and received between wireless transmitters and receivers, which determines the number of consecutive transmissions of data to be transmitted and controls a data decoder, a tone signal with a frequency corresponding to the number of consecutive transmissions of data signals to be transmitted is used. a tone signal generator that generates a tone signal and outputs it before the data signal output from the data encoder; and a tone signal generator that detects the frequency of the tone signal from the transmission wave received from the wireless transceiver of the other party and generates a data signal according to the frequency. What is claimed is: 1. A data transmission system comprising: a tone detection section that transmits the number of consecutive transmissions to a data decoder.