JPH0693641B2 - Wireless repeater - Google Patents

Description

The present invention relates to a wireless communication relay device (repeater), and particularly covers a plurality of transmission / reception areas due to different antenna directivities, reception sensitivities, transmission outputs, and the like. The present invention relates to a wireless relay device suitable for relaying.

(B) Conventional Technology As shown in FIG. 2, a conventional wireless relay device (hereinafter referred to as “repeater”) has, for example, a repeater in two areas having different transmission / reception areas, in which a pair of transmitters / receivers are independently configured. Was there.

In the figure, 40 is a first repeater, which is composed of a pair of a first receiver 43 and a first transmitter 44. An antenna duplexer 42 is connected to the transmitting / receiving antenna 41.

The first repeater 40 configured in this manner covers the first transmission / reception area 45 and operates as a relay system for a wireless slave station (not shown) in the first transmission / reception area 45. You can

In the figure, 50 is a second repeater, which is composed of a pair of a second receiver 53 and a second transmitter 54. Reference numeral 52 denotes an antenna duplexer connected to the transmitting / receiving antenna 51.

The second repeater 50 configured in this manner covers the second transmission / reception area 55 and operates as a relay system for a wireless slave station (not shown) in the second transmission / reception area 55. You can

56 is the first sending / receiving area 45 and the second sending / receiving area 55
Are overlapped, and the common transmission of the first and second repeaters 40, 50
This is the reception area.

As described above, in the wireless relay system, each repeater has a pair of transmission / reception systems, and the pair of transmission / reception systems are operated independently of each other.

(C) Problems to be solved by the invention However, in the above-described conventional repeater, since the pair of transmitters / receivers are independently configured, the first transmitter / receiver area 45
Is located in another area, such as the second transmission / reception area
When calling the partner station in 55, it cannot be relayed unless there is a common transmission / reception area 56 with different transmission / reception areas, and the frequency must be set according to the second repeater. There was a flaw.

If the frequency band of the first repeater and the frequency band of the second repeater are different, two radios must be prepared and the radio set to the frequency matching the repeater that covers the position of the other station must be used. Sometimes it didn't.

In addition, there is a drawback in that it is not possible to interrupt and call the partner station during a call or to communicate.

The present invention has been made in view of the above points, and an object thereof is to solve the drawbacks of the related art, to preset a control signal corresponding to a partner station with which communication is to be performed, and to "connect" a switch by a decoder. The present invention is to provide a repeater that can automatically select and communicate with a partner station by turning off or off, and that the demodulation signal mixer can call the partner station even during a call.

(D) Means for Solving the Problem The wireless relay device of the present invention includes a first relay having a first receiver and a first transmitter, a second receiver and a second transmitter. And a first switching means for supplying the demodulated signal of the first receiver to the first transmitter, and the demodulated signal of the second receiver for the first relay. A second switching means for supplying the transmitter, a third switching means for supplying the demodulated signal of the first receiver to the second transmitter, and a demodulated signal of the second receiver for the third signal. Second switching means for supplying to the second transmitter, the first switching means and the third switching means according to a control signal received by the first receiver.
Of the switching means and controls the second switching means and the fourth switching means in accordance with the control signal received by the second receiver.

(E) Action First receiver, first transmitter, transmitting / receiving antenna, first repeater configured with antenna duplexer, and second repeater configured in the same manner as the first repeater When the slave stations in the first repeater transmission / reception area and the second repeater transmission / reception area transmit between these repeaters, these slave stations transmit to the transmission / reception area of the partner station. Control signal (for example, a tone signal such as CTCSS) is preset.

When the receiver side of the repeater receives a transmission signal from the slave station, the filter provided at the output side of the receiver takes out the control signal, and one or more switches operated by a decoder for decoding the control signal. Becomes a "contact point", and the other station can be called and communicated via the transmitter of the target repeater.

That is, the demodulated signal received by the first receiver is turned on by the first decoder to "close" the third switch,
To the second transmitter via the demodulation signal mixer of.

The demodulated signal from the slave station in the first transmission / reception area is transmitted from the second transmitter to call the partner station in the second transmission / reception area.

On the other hand, the transmission signal from the partner station in the second transmission / reception area is received by the second receiver, and the received demodulated signal is turned on by the second decoder to make the second switch "close" to make the first signal. Of the demodulated signal mixer to the first transmitter.

The demodulated signal from the partner station in the second transmission / reception area is the first
Is transmitted from the transmitter of No. 1 to the slave station in the first transmission / reception area and can communicate with the slave station.

In this way, the demodulation signal mixer can send the demodulation signals of the own station (slave station) and the partner station to the transmitter, so that even if the partner station is receiving the call transmission with another station, the partner station Can be called.

(F) Embodiment An embodiment of the wireless relay device according to the present invention will be described with reference to FIG.

FIG. 1 is a block diagram showing a wireless relay device composed of two sets of transmitters and receivers.

In the figure, 1 is a first transmission / reception unit, 2 is a first transmission / reception area (hereinafter simply referred to as an area) which can be operated by the first transmission / reception unit 1, and 3 is a first transmission / reception unit 1. Common antenna for transmitting / receiving, 4 is an antenna duplexer, 5 is a first receiver, 6
Is the first transmitter.

7 is a first filter for extracting a control signal from the output signal of the first receiver 5, 8 is a first decoder for decoding the control signal from the filter 7 and activating a switch corresponding to this control signal, Reference numeral 10 is a first and second switch that performs a "contact" or "disconnection" operation according to an instruction from the decoder, and 11 is a first switch for mixing demodulated signals from the switches 9 and 10.
It is a demodulation signal mixer of.

A first wireless relay device (hereinafter referred to as a repeater) is composed of a first transmission / reception unit 1 and a circuit below the first filter for controlling a demodulated signal, and the second repeater is the same as the first repeater. The second transmission / reception unit 20 and the control unit for the demodulated signal below the second filter 26.

Reference numeral 31 is a common transmission / reception area in which the first area 2 and the second area 21 overlap.

For example, two systems of the first and second systems configured as described above are provided.
Of the wireless slave station A in the first area 2
A case will be described in which (hereinafter, simply referred to as slave station A) calls and communicates with slave station B in second area 21.

The transmission signal transmitted from the slave station A is received by the first receiver 5 via the antenna 3 of the first repeater. The demodulated output signal of the first receiver 5 is supplied to the filter 7 and simultaneously to the first switch 9 and the third switch 28 in the second repeater.

The filter 7 extracts the control signal from the demodulated signal of the first receiver 5 and supplies it to the first decoder 8.

The transmission signal from the slave station A includes the second area of the slave station B.
A control signal for sending an audio signal to 21 is preset, and the control signal supplied to the first decoder 8 is decoded to detect the presence of the control signal.

Having detected the control signal, the first decoder 8 actuates the third switch 28 of the second repeater to "contact" it. Therefore, the demodulated signal of the slave station A is supplied to the second transmitter 24 via the third switch 28 and the second demodulated signal mixer.

The demodulated signal of the slave station A supplied to the second transmitter 24 is
Is transmitted from the transmitter 24 to the second area 21 and can be received by the slave station B.

When the slave station B transmits to the slave station A, the slave station B sets and transmits a control signal for transmitting to the first area 2 of the slave station A in advance. The control signal set by the slave station B is received by the second receiver 23 as described above, and the second filter 23 receives the control signal.
26, through the second decoder 27, the second of the first repeater
The switch 10 is set to “contact”, the first transmitter 6 transmits the signal to the first area 2, and the slave station A can receive the signal.

In this way, by selecting and transmitting a control signal for transmission from the slave station to the area of the partner slave station, the area of the partner slave station can be automatically designated.

Further, when the slave station A calls the partner slave station, the slave station B receives, for example, the transmission of another slave station C in the same second area 21 using the second transmission / reception unit 20. , The fourth decoder 29 is “closed” by the second decoder 27. In this state, the first decoder 8 which has detected the control signal from the slave station A makes the third switch 28 of the second repeater "close" and supplies the demodulated signal of the slave station A to the demodulated signal mixer 30.

The demodulation signal mixer 30 is supplied with the voice from the slave station C and the calling voice signal from the slave station A, and mixes them to generate a second transmitter signal.
Sent to 24.

The slave station B, which receives the transmission signal from the second transmitter 24, can receive the mixed voice signals of the slave station C and the slave station A. Even during communication with the slave station C, the slave station A You can know that there is a call signal.

(G) Effect of the Invention As described above, the wireless relay device according to the present invention has the first relay having the first receiver and the first transmitter, the second receiver and the second transmitter. A second repeater having a transmitter, a first switching means for supplying a demodulated signal of the first receiver to the first transmitter, and a demodulated signal of the second receiver for the first transmitter. Second switching means for supplying the second demodulator to the transmitter, third switching means for supplying the demodulated signal from the first receiver to the second transmitter, and demodulated signal from the second receiver. Fourth switching means for supplying to the second transmitter, controlling the first switching means and the third switching means according to a control signal received by the first receiver, The second switching means and the fourth switching means are controlled in accordance with the control signal received by the second receiver. If the partner station is in the area of the repeater on the local station side, communication can be performed via that repeater, and if the partner station is in the area of another repeater, it is possible to communicate via both repeaters. Can communicate with each other. Further, even when the partner station is communicating with another station via another repeater, it is possible to call via both repeaters. Therefore, the repeater on the local side and another repeater may be installed at the same place or may be installed at separate places.

Further, there is an effect that the power consumption of the slave station can be reduced and the wireless device can be simplified.

Further, there is an effect that a transmission signal can be received from another station during communication, and in particular, a plurality of voices from different areas can be simultaneously heard.

Moreover, it has excellent features such as a simple structure and easy implementation because it can be constructed at low cost.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a wireless relay device according to the present invention. FIG. 2 is a block diagram showing a conventional example. Explanation of main symbols 1: First transmitter / receiver 2: First transmitter / receiver area 3: Shared transmit / receive antenna 4: Antenna duplexer 5: First receiver 6: First transmitter 7: Filter 8: First decoder 9,10: First and second switches 11: Demodulated signal mixer, 31: Common transmission / reception area

Claims (1)

[Claims] 1. A first repeater having a first receiver and a first transmitter, a second repeater having a second receiver and a second transmitter, and the first repeater. Switching means for supplying the demodulated signal of the receiver to the first transmitter, second switching means for supplying the demodulated signal of the second receiver to the first transmitter, and Third switching means for supplying the demodulated signal of the first receiver to the second transmitter, and fourth switching means for supplying the demodulated signal of the second receiver to the second transmitter. Controlling the first switching means and the third switching means in response to a control signal received by the first receiver, and controlling the first switching means and the third switching means in response to the control signal received by the second receiver. A wireless relay device, characterized in that it is configured to control the second switching means and the fourth switching means.