JPS6345136B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a selective calling system that allows an arbitrarily selected combination of a plurality of slave stations to be simultaneously called with a simple operation.

A system in which a selection button corresponding to a slave station is provided on a master station and a desired slave station is called and communicated with by operating the selection button, and a system in which a plurality of slave stations are called simultaneously are already known. It is also known to enable selective calling for each slave station group. In such selective calling for each slave station group, the slave stations that make up the group are determined in advance, but if it is necessary to call all specific slave stations across multiple groups, , a selection button corresponding to a slave station must be operated, and if there are many called stations, the operation becomes complicated and there is a risk of erroneous operation.

SUMMARY OF THE INVENTION An object of the present invention is to enable selective calling for slave stations, selective calling for slave station groups, and selective calling for combinations of slave stations within different groups with a simple operation. be. Examples will be described in detail below.

As shown in Figure 1, the master station CT and slave stations RT1~
RTn is connected via a wireless line, and when the master station CT calls and communicates with a selected slave station, the master station CT is provided with selection buttons SB corresponding to each of the slave stations RT1 to RTn. The selection signal transmitted from the master station CT by operating the selection button SB generally uses a tone signal, but it is of course possible to use a digital signal. The slave stations RT1 to RTn are, for example, the second
As shown in the figure, the signal received by the antenna ANT is demodulated by the receiving unit RCV, and in addition to the detection circuit DET and the amplification unit AMP, the detection circuit DET detects whether or not the own slave station is receiving a call. For example, when a tone signal is used, the detection circuit DET can be configured with a narrowband filter, a level detection circuit, and the like.

When the detection circuit DET detects that the own slave station is receiving a call, the amplifier unit AMP is activated,
Amplify the message from the master station CT and use the speaker SP
to drive. When each slave station RT1 to RTn is installed outdoors, broadcasting can be performed by a slave station selected from the master station CT.

When the radio system described above is applied to a municipal disaster prevention administrative radio system, one or more slave stations will be placed in each region within the municipality, and the master station will
CT selection buttons are placed together for each region, and by providing a selection button that simultaneously calls slave stations within a region, selective calling for each slave station and selective calling for each region can be performed with a single operation. Can be done. However, when selectively calling specific slave stations within each area, such as fire stations, river stations, etc., it is necessary to operate the selection buttons for the number of those specific slave stations. Therefore, the present invention makes it possible to call even such a specific slave station with a single operation of the selection button.

The selection buttons on the master station CT are provided, for example, as shown in FIG. Each selection button, X1 to Xm, is a selection button for selecting a combination of specific slave stations. For example, by operating selection button B, the slave stations called by operating selection buttons B1 to Bn are called all at once, and by operating selection button C, the slave stations called by operating selection buttons C1 to Cn are called all at once. All stations are called at once.

The selection button X1 is, for example, A1, A2, C1, D.
3, combination of E2, E3, selection button X2 is A2, B
The combination of 1, C2, C3, E1, selection button X2 is
It shows the combinations of An, B2, D1, D2, E1, etc., and the combinations of the selection buttons X1 to Xm and slave stations are determined and set in advance.

Figure 4 is a block diagram of the main parts of the master station CT.
SB1 to SBl are selection buttons A to E, A1 shown in Figure 3.
~En, and X1~Xm are the selection buttons X shown in Figure 3.
1 to Xm. Also, MEM is a memory that stores the above-mentioned specific slave station combinations, INF is an interface circuit, CONT is a control section, SSG is a selection signal generation section,
DSP is a display section, and S is a transmission section. Each selection button has a light emitting element L such as a light emitting diode or a lamp,
Light is emitted by operating the selection button, and this light emission control means may be configured to use, for example, a contact point when the selection button is pressed, or to apply a control signal from the control unit CONT to the selection buttons SB1 to SBl as shown in the figure. Can be done.

For example, when you operate selection button X1, memory MEM
The information corresponding to the selection buttons A1, A2, C1, D3, E2, and E3 is read out and added to the interface circuit INF. The interface circuit INF applies the same signal to the control unit CONT as when the selection buttons A1, A2, C1, D3, E2, E3 are operated, and the selection signal generation unit SSG applies the same signal to the selection buttons A1, A2, C1, D
For example, a selection signal for a slave station of a department related to fire department corresponding to E3, E2, and E3 is generated, and is modulated at a predetermined frequency and transmitted from the transmitter S.

Also, the light emitting parts L of the operated selection button X1 and combination selection selection buttons A1, A2, C1, D3, E2, and E3
emits light to confirm the selective call, and the display unit DSP displays the arrangement of the slave stations, so that the slave station selectively called can be displayed and confirmed based on information from the control unit CONT. That is, A1, A2, C1, D3, E2 on the display section CONT,
E3 is displayed by a light emitting diode or the like.

Furthermore, the control unit CONT can have a logical configuration in which the operation signals of the selection buttons SB1 to SBl are encoded and added to the selection signal generation unit SSG.
has a configuration that generates a selection signal by a combination of tone signals or the like in accordance with the code signal, and the transmission section S transmits the selection signal. Also, audio signals from a microphone, tape recorder, etc. are modulated and transmitted from the transmitter S, and can be received and broadcast by a called slave station.

The above embodiment shows one-way communication from the master station CT to the slave station, but the slave station has a transmission function,
Of course, it is also possible to add a receiving function to the master station to perform bidirectional communication, and the slave stations can include not only fixed stations but also mobile stations. Of course, a semiconductor memory can be used as the memory MEM, but it is also possible to use means for setting slave station combinations using a pin board or the like. Moreover, it can be applied not only to a wireless system but also to a wired system in which each slave station is connected by wire.

As explained above, the present invention provides "slave station selection buttons A1 to En corresponding to slave stations, and group selection buttons A1 to En corresponding to slave station groups."
~E, combination selection buttons X1 to Xm corresponding to combinations of slave stations in different slave station groups, storage means storing slave station combinations such as memory MEM, and selection signal generation controlled by control unit CONT; A unit SSG or the like is provided in the master station CT, and by operating the combination selection buttons X1 to Xm, the combination information of the slave stations is read from the storage means, and a selection signal is output based on this combination information to selectively call the slave stations. Therefore, it is possible to selectively call various combinations of slave stations with a single operation of the combination selection button, and it is possible to easily selectively call a plurality of slave stations in a desired combination from among a large number of slave stations. Become something you can do. Therefore, when applied to the above-mentioned municipal disaster prevention administrative radio system, there is an advantage that selective calling is facilitated when broadcasting for each area or calling broadcasts to specific types of calls scattered within each area, such as fire department related departments.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a wireless system consisting of a master station and a plurality of slave stations, FIG. 2 is a block diagram of the main parts of the slave station, and FIG. 3 is an explanatory diagram of a selection button according to an embodiment of the present invention.
FIG. 4 is a block diagram of essential parts of a master station according to an embodiment of the present invention. CT is the master station, RT1 to Rn are slave stations, A1 to En are slave station selection buttons, A to E are group selection buttons, X1 to Xm are combination selection buttons, MEM is memory, INF is interface circuit, CONT is control section, DSP is the display section, SSG
is a selection signal generator, S is a transmitter, and L is a light emitting element.

Claims (1)

[Claims] 1 In a method in which a master station selectively calls a slave station for communication, the master station has a slave station selection button corresponding to the slave station, a group selection button corresponding to a slave station group, and a slave station in a different slave station group. a combination selection button corresponding to the combination, a storage means for storing the combination of the slave stations, and a selection signal generating means; read out the combination information of the slave stations from the storage means by operating the combination selection button; A selective calling system characterized in that a selection signal is output from the selection signal generating means based on the combination information to selectively call a slave station.