JPS58146147A - Radio relaying system - Google Patents

Abstract

PURPOSE:To attain multistage relaying with carriers of the same frequency, by providing a recording and reproducing means for a relay station and transmitting signals by giving a time difference between a relay stations of each stage, in the relaying of multistage. CONSTITUTION:In a transmission station 1, a transmission signal (signal from a microphone 11) is superimposed on a selection signal P1 and transmitted 4a from a transmitter 14. In a relay station 2a, a recorder 24 is made to the recording state through the reception of a selection signal P1 for the recording of the reception signals. When the transmission of a transmission station 1 is finished and the selection signal P1 is lost, the recorder 24 stops recording, rewinds tapes automatically and reproduces the content of recording from the position of start of recording. While the recorder is under reproduction, a transmitter 26 of the relay station 2a is started and transmits 4b the content of reproduction of the recorder 24.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wireless relay system that performs broadcasting or broadcast communication using 14-carrier frequencies.

In general, in wireless communications, when attenuation due to mountains etc. is large, or when the communication area is wide and the radio waves cannot reach directly, it is common to relay the radio waves through a place where the waves can easily pass through. It is true.

FIGS. 1 and 2 show relay systems that have been used in the past. In Figure 1, (1) is a transmitting station, (2
) is a relay station, (March) is a receiving station, (4) is a radio wave (for 4 stations in China), and (5) is a radio wave (for a receiving station). Furthermore, the communication distance is long and the radio waves are attenuated. If it is large, it cannot be handled by a relay station, and it is necessary to install multiple middle 4 stations.Also, if the communication range is narrow and the radio waves cannot reach all the stations directly from the transmitting station, 49 shown in the multi-stage medium #-example in Figure 2, it is necessary to select method 2 in which the relay station sequentially relays from the relay station to the next medium-stage station.

In FIG. 82, (1) is a transmitting station, (2a),
(21)) is a relay station, (3a), (3b) is a receiving station,
(5a), (5b) are radio waves (for receiving station), (48)
is 4 waves (for relay station (2a)), and (4b) is a radio wave (for relay station (4)).

In Figure 1, the 4 waves (4) of the transmitting station +11 are received by the middle and stray stations (2), and the relay station (2) amplifies the missed signal to the control level and transmits the radio wave (5) with a 1g signal. , Kamenami (5) is received by the receiving station (3).

In addition, in the case of Figure 1 and J2, the transmitting station (11L: t4 wave (4a) is received by the relay station (2a), and the relay station (2a
) amplifies the received radio wave and generates a radio wave (51L)t (41
)), and the radio wave (5a) is received by the receiving station (31L). On the other hand, the radio wave (4b) is received by the relay station (2b), the relay station (2b) transmits the radio wave (5b), and the radio wave (5b) is received by the receiving station (3b). Furthermore, if necessary, the relay station (2b) sends out radio waves (4c) and relays them sequentially through multiple stages as described above.

The conventional multi-stage relay system is configured as described above, but in this case, radio waves (4a)s (0)p (4a)...
If ・ is a carrier wave of the same frequency, the transmitter station [1] transmits nine radio waves (dull), and the relay station (mu) transmits radio waves (dull).
Upon reception of , 4 waves (sen) are transmitted. The radio wave (4b) enters the relay station (2b) and is also received by the relay station (抛), so that the radio wave (dull) and (4b) are received at the same time. This causes problems such as oscillation, suppression, and continuous relay due to simultaneous reception. To counter this, we can either use different radio waves from radio waves (mu) and radio waves (4b), or we can take technical measures to set radio waves (4b) to a value that does not pose a problem to radio waves (censor), but the former The latter increases the number of radio waves used, which is counter to effective utilization, while the latter has the disadvantage of being difficult to implement technically.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and in applications such as broadcasting or broadcast communication where the content received at a receiving station can tolerate some time difference depending on the region, the radio waves of multiple relay stations (for relays) ) is not transmitted at the same time, but with a time difference, to prevent simultaneous reception of radio waves.This enables multi-stage relaying on the same radio wave without requiring any technical measures, and aims to utilize radio waves effectively. It is something that can be done.

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

In FIG. 3, (11 is a transmitting station, (2a)? (+) is an intermediate station, (3a), (3b) is a receiving station, (4a),
(41)) is a radio wave (for relay stations), (5aL (51)
) is 4 waves (for receiving station) 114 is transmitter 1H, (13')
, (x3b) is the selection signal oscillator, (11) is the microphone, 0 is the transmission activation switch, (ma), (2
1b) is a receiver, (22a), (22b) is a selection signal receiver, Shun is a relay, (Z5a), (23b), (
23c) is the breaker contact, the trout is the recorder, ■ is the relay, (
25a) is the a4E device contact, - is the transmitter (for relay station),
(2Ba) and (28b) are transmission + fi (for receiving station), 4 is a relay, and (29a) is a hot junction for all.

The functions of each configuration are transmitter (+Xun, Ni), (2Ba),
(28b) is for transmitting modulated radio waves, and the transmission is activated by the switch O, contact (25a), (23a)
, (29a) is activated. Modulation is done by microphone (
1. Modulate the audio output signal from the receiver (alIL), (nb) or recorder.

Receiver (21aL (211)), (3oa), (
3ob) receives modulated nine radio waves and demodulates them. The selection signal generator (13a), (L5b) generates lPx by the selection signal receiver (m), (221)).

This is the ninth one that detects P2 and identifies radio waves (4aL (41) <for relay stations). Note that the selection signals Pi and Pit are low-frequency signals that are superimposed on the audio signal and sent to the transmitter H', and then to the selection signal receiver (H', 22).
a), (22b) are the selection signals PH, P during reception output
Detect g. The I&Sound machine (C) records and plays back the communication content, and while the relay I wire contact (23a) is closed,
Make a recording. Further, when the contact (23a) is opened, the recording is automatically rewound and playback starts from the recording start position, and the recorded content is played back until it stops at the recording end position. The relay) is driven when the recorder is in operation (recording/playback).

Relay (to), @ is selection signal receiver (zaaL (wing b)
) is driven while detecting a signal.

Now, when broadcasting or broadcast communication is performed using the microphone (11), the sound is transmitted by the microphone (11). By closing the transmission start switch rJ, the selection signal oscillator (13a) is activated. The selection signal P is superimposed on the electrical signal of the microphone (11) and added to the transmitter 04, and the radio wave (
4a) (for relay station) is transmitted. The radio wave (4a) is received by the receiver (21a) and sent to the selection signal receiver (22a).
) detects the selection signal P1, and if the selection signal P1 is present in the output, the relay block is driven. When the contact point (23a) of the 5-ring electric device 4 closes, the recorder starts recording, and the reception 4! l! (21a) Record the output audio signal.

On the other hand, during this time, the contacts (reed) of the relay close,
As the transmitter (28a) starts transmitting, the audio signal output from the receiver (21a) is added to the transmission input of the transmitter (2&) and converted into an audio signal by the transmitter (28a) II4. Radio wave (5a) C for receiving station) is transmitted. The radio wave (5a) is received by the receiver (bubble), thereby forming a relay line between the transmitting station (11) and the relay station ('') and the receiving station (3a).Next, this communication ends and the transmission is completed. By returning the power of the start switch α, the transmitter (1) stops transmitting, the transmission of radio waves (4a) also stops, and the selection signal Pl is also turned off by the transmission switch O, so the selection signal receiver (22a)
) is no longer detected, and ) is restored to the relay. When the relay contact (23a) returns, recording by the recorder (c) is stopped, and the recording is automatically rewound to play back the recorded content from the recording start position. Playback stops when all recorded content has been played, returns to the original recording start position, and prepares for the next recording. When the recorder is in playback mode, the recorder outputs DC output, which drives the relay () and closes the contact (25a) of the relay (the relay), causing the transmitter () to transmit (). d activation is performed, and the selection signal oscillator (13b) is activated by the contact (25a) to generate the selection signal P.
Output II. The selection signal PlI and the output of the recorder are superimposed and added to the transmitter to transmit a modulated radio wave (4b) (for use as a prayer station for China). Note that the contact (23b) remains open while the selection receiver (22a) detects the selection signal Pl so that the transmission of the transmitter (to the transmitter) is activated only when the recorder is in the playback state. During this time, the recorder ■ is in the recording state. Further, when the selection signal PIO is no longer detected, the circuit is closed, and the contact point (25a) of the relay 4 configures the playback state of the recorder and activates the transmitter 4. The friend radio wave (4b) transmitted from the transmitter) is received by the receiver (mb), and the selection signal pH in the reception output is the selection signal reception aI
(221)) and drives the g-can (2). The transmission of the transmitter (28b) is activated by the sensor contact (29a), and the reception output of the receiver (21b) is input to the transmitter (281)) to transmit the variable aim wave (5b). . The radio wave (5b) is received by the receiver (3C1'b) and sent to the transmitting station (1) and the relay station <2! L)t (
21)) A relay line for the receiving station (3b) is configured.

In the above embodiment, broadcasting or broadcast communication is performed using a microphone (11), but the communication content may be transmitted using audio signals or other coded data from a device other than the microphone (11). It can be anything.

As described above, according to the present invention, relay stations can receive and transmit the same radio wave with a time difference, thereby enabling relaying without increasing the number of radio waves used. Furthermore, by superimposing a selection signal on the relay wave, it is possible to identify the transmitted wave and the received wave, and it is possible to prevent unnecessary relay due to interference during transmission and reception.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of relaying showing the general concept of relaying, FIG. 2 is a conceptual diagram of relaying in the case of multi-stage relaying, and Diagram M3 is a structural layer of a wireless relay device according to an embodiment of the present invention. In the figure, (1) is a transmitting station, (2a), (2b) is a central a station, and (3a). (3b) is a receiving station, (13a), (ub) is a selection signal transmitter, (23a), (23b) is a selection signal receiver,
(Foundation) is Recording dA. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Makoto Kuzuno - Figure 1

Claims (1)

[Claims] In multi-stage repeating using carrier waves of the same frequency, there is a means for temporarily storing the received contents in each relay station, and a means for reproducing the received recorded contents and transmitting them to the next relay station after the reception storage is completed. An S-line relay system characterized in that a transmitting means is provided, and a time difference is provided between the transmitting and receiving operations of each of the membrane relay stations.