JPH0281532A - Answerback system - Google Patents

Abstract

PURPOSE:To avoid the momentary effect of a radio line and to obtain a highly reliable data by providing a detection section detecting the presence of an answer signal from a slave station to a master station and allowing only a slave station whose answer signal is missing to apply answerback operation again automatically. CONSTITUTION:An answer signal designated from slave stations 3-5 receiving an answer request signal from a master station 1 is returned in a radio wave 2. A transmitter-receiver 6 of the master station 1 receives the radio wave via an antenna 7, the output is processed by a data processing section 9 and a detection section 12 detects the absence of the answer signal of each slave station. If there is any missing in the answer signal, a number of an object slave station is outputted to an answer request setting section 8 to apply answerback operation only to a slave station whose answer signal is missing automatically. Thus, the missing of data due to momentary disturbance of a radio line being a transmission line is prevented to obtain a highly reliable data.

Description

[Detailed Description of the Invention] [Field of Industrial Application] Hontakuma is an answerback (answer request and response) used by a broadcast radio (public relations radio) master station to monitor the status of slave stations.
It is related to.

[Conventional technology]

Figure 3 is a block diagram showing a conventional answerback system. In the figure, (1) is the master station, (3)
(4) and (5) are slave stations, the number of which is arbitrary, and communication with the master station is carried out using inorganic radio waves (2).

Figure 4 is a detailed block diagram of the master station (1) in Figure 3. In the figure, (6) is a transceiver for emitting radio waves, (7) is an antenna, and (8) is a A setting unit sets an answer request to the slave station, (9) a data processing unit that processes an answer signal from the slave station, (10 is a data display unit, and αυ is a data recording unit.

Next, the operation will be explained. From master station (1) to slave station (3)
(4) When an answerback request is made for (5), the signal is supplied from the setting unit (8) to the transmitter/receiver (6), converted to inorganic radio waves (2), and sent to the receiver via the aerial vehicle (7). Bureau (3
) (,4) t5). The slave station receiving the radio wave 211Jl sends back an answer signal to the master station (1) in the time sequence shown in FIG. 5 in accordance with the order specified by the master station. In the master station (1), the received answer signal is processed by the data processing section (9), and then displayed on the display section tJI and recorded on the recording section ση.

[Problem to be solved by the invention]

The conventional answerback method was configured as described above, so as the number of slave stations increases, the time it takes to receive the answer signals from all slave stations becomes longer, so the non-meter wave is affected by external interference such as interference. There was a problem that the data of the slave station whose answer return time was specified would be lost at the time when radio interference such as noise occurred, resulting in a loss of reliability for all data. .

The present invention has been made to solve the above-mentioned problems, and by preventing data loss due to instantaneous disturbances in the wireless line that is the transmission path, reliable data can be obtained. The purpose is to obtain an answer-back method.

[Means to solve the problem]

The answer-back method according to the present invention allows a slave station that does not receive an answer at the time specified by the master station (a slave station that has lost an answer) to retry again or again (to answer at a different time). This prevents data loss due to wireless line deterioration over time.

[Effect]

The answer bank method according to the present invention is based on the answer bank system of the present invention.
By detecting the presence or absence of omissions, if there is a omission II + 1, an answerback is sent only to the target slave station. If there is an omission 1' or no 1', it is displayed and the recording can be started. .

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, (1) is a master station, (6) is a transmitter/receiver for the master station, (7) is an antenna, (8) is an answer request setting unit, (
9) is a data processing section, (10 is a display section, αυ is a recording section, and (6) is a detection section that detects all data omissions in the data of the data processing section.

Next, the operation will be explained. Answer from master station (1)
The slave station that received the request signal (3) returns an answer according to the time sequence shown in Figure 2 specified from the standard (5) as a radio wave (2).The master station sends this radio wave to the antenna (7). The output is processed by the data processing unit (9), and the detection unit detects the arrival of the answer of each slave station, and if there is a disqualification, the number of the target slave station is sent. It outputs to the answer request setting section (8) and automatically performs an answer-back operation only to the slave station where the answer is missing. If the answer continues to be missed, the data is displayed and recorded after repeating the set number of times. If there is no missing answer in the detection unit (6), a data output OK signal is output from the detection unit port to the data processing unit (9), and the data from all the slave stations' answer backs is displayed on the display unit QO. and recorded in the recording section αη.

〔Effect of the invention〕

As described above, according to the present invention, the master station is provided with a detection unit that detects the presence or absence of an answer signal from a slave station, and when there is a dropout, only the dropped slave station automatically performs the answerback operation again. I made it possible to do so, so no! This has the effect of avoiding the instantaneous influence of a single line and obtaining highly reliable data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an answer-back method according to an embodiment of the present invention, FIG. 2 is a diagram showing the time sequence of FIG. 1, and FIG. 3 is a block diagram showing an outline of the conventional answer-bank method. FIG. 4 is a detailed diagram of FIG. 3, and FIG. 5 is a diagram showing a conventional time sequence. In the figure, (2) indicates a detection section. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] In the answer-back method, in which a slave station is automatically activated in response to an answer request from a broadcast radio master station consisting of one master station and multiple slave stations, and the status of the slave stations is monitored by the master station, An answer back system characterized in that when an answer is not received, the master station automatically retries the unanswered slave station.