JPS6016771B2 - Communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a communication device that automatically changes the arrangement channel depending on the time period.

BACKGROUND ART Conventionally, for example, in business communications, communication frequencies for each time period are determined in advance using a table or the like, and communications are performed in accordance with this. When communicating in this way, if interference occurs, it is necessary to change to a different frequency and communicate, and for this reason the new frequency must be notified.
This may not be communicated to the other party due to interference.
Such a phenomenon is remarkable in shortwave communications. In addition, as the number of communication devices increases, the number of tables for the above-mentioned arrangements between two stations of each communication device needs to be created individually, and the more frequencies used, the more the table becomes even more complicated. This makes it difficult to select a specific frequency. Therefore, the present invention provides a communication device that automatically specifies and changes the communication frequency between two specific stations among a plurality of stations depending on the time zone, and thereby enables communication with the other party using the selected frequency. This is what we are trying to provide.

An example will be described below in which five 40-channel transceivers are used to communicate between two arbitrary stations.

First, Figure 1 shows the overall block diagram, and 1 is a keyboard where you enter the call sign of the person you are trying to call and your call sign by selectively pressing multiple key buttons. The signal is converted into a specific code by the encoding circuit 2.

That is, if different call signs are determined for each of the five transceivers, the code created by the call signs between two of them will be the only code that is different from the code between the other stations. 3 is a channel designation circuit that selects five channels with different priorities for each code and each time period, and uses a storage element such as a ROM.

As shown in FIG. 2, the stored contents of the channels in the vertical axis direction, which are selected by codes, are all different in the same time period. In other words, this figure 2 shows the unique code number determined by the call signs of two specific stations.
A set of channels selected by digital codes (in reality, digital codes) are prioritized in the vertical direction, and a set of similar channels selected for each unit time period is set in the horizontal direction. In this example, A to E are selected sequentially in each cycle. On the other hand, 4 is a pulse generation circuit that receives a standard radio wave and generates a timing pulse, for example, every minute.The signal from this pulse generation circuit 4 is sent to a control circuit 5.

This control circuit 5 sends a time zone selection signal in the horizontal axis direction shown in FIG. 2 to the channel designation circuit 3 every minute.
In other words, for the first minute, the signal for selecting time period A is
For the next minute, the signal for selecting time period B is set to 1.
A signal to select time slots C to B is sent every minute, and after 6 minutes, a signal to select time slot A is sent again, and this process is repeated sequentially. That is, a different set of channels is selected every minute for 5 minutes, and this is then repeated as one cycle. Note that 6 is a reset circuit that is reset so as to send out a signal for selecting time zone A by pressing an internal attached switch (not shown). On the other hand, 7 is a high frequency amplifier having a reception band width of 40 channels of the transceiver, and the carrier signal amplified here is filtered by a filter circuit 8 having a 4M bandpass filter corresponding to each frequency band of the 40 channels. Each channel is selected individually and these four unique signals are sent to the channel selection circuit 9. This channel selection circuit 9 contains five channel signals designated and prioritized by the channel designation circuit 3 described above, and these signals select the corresponding channel among the signals from the filter circuit 8. Five signals are selected according to their priority and sent to one display circuit. Also,
Five channel signals from the channel designation circuit 3 are also sent to the display circuit 1, and the display 10a displays the channels in priority order from the top based on these channel signals.

This display circuit 10' receives the carrier wave signals of five channels selected from the channel selection circuit 9 and given priority as described above, and this signal causes the lamp 10b of the channel in which the carrier wave exists to be turned on. One or more of them lights up. That is, for example, if a carrier wave exists in the first channel, the lamp 10b of the display 10a that displays the first channel lights up,
It indicates that the first channel is currently in use. In the above configuration, in order to synchronize each station of the five transceivers, when they communicate with each other by some method and press the button of the reset circuit 6 at the same time, the communication device of each station receives the standard radio wave and sends a timing pulse. Even if the time slot selection signals from the control circuit 5, which sequentially outputs time slot selection signals based on the pulses from the pulse generating circuit 4 that are generated, are different, the time slot selection signals are output at the same time, and from then on
Every minute, each station synchronizes with 8→C→D→E→A and so on and outputs a time zone control signal. Here, 5
Arrangements are made for two specific stations to communicate at a specific time, and at that time, each of those two stations inputs the call sign of the target station and the other station on the keyboard 1. , the only code determined only by the call signs of those two specific stations will be input from the encoding circuit 2 to the channel designation circuit 3.

Now, assuming that this code is A and the time zone selection signal from the control circuit 5 is A, the channel designation circuit 3 having the memory contents shown in Table 2 selects 1 and A. Five channels, 18, 19, 36, and 37, are designated, and these five channels have a priority order with the left end being the highest priority. The signal of this designated channel is input to the channel selection circuit 9 and also to the display circuit 10', and the channel is displayed on the display 10a according to the priority order.

The channel signal input to the channel selection circuit 9 selects five carrier wave signals of 40 channels from the filter circuit 8, prioritizes them, and displays the lamp 10b of the display circuit 10 according to the presence or absence of the selected carrier wave signal.
Turn on or off.

Therefore, for example, when carrier waves of the 18th channel and the 36th channel among the designated channels are present, the lamp corresponding to that channel is lit.

Therefore, for two specific stations with which communication is desired, the transceiver channels may be sequentially tuned to five stations, ie, the 1st, 18th, . . . 37th stations, according to the display.

In this case, the display lasts for 1 minute, so if the priority is switched every 12 seconds, communication can be performed using any of them. Note that the channel on which the lamp is lit is the channel where the carrier wave exists, and will cause interference, so if there is a channel on either side where the lamp is lit, turn it down. In addition, these first to third
If communication is not possible on channel 7, the time zone selection signal from the control circuit 5 changes after one minute has passed.
B, the channels 9, 10, 27, 28, and 5 are newly designated, and communications are conducted accordingly.

Furthermore, if interference occurs during communication, the same procedure as for starting communication may be performed. Note that the above embodiment is an example in which communication is performed using five 40-channel transceivers, but the present invention is not limited to this, and the present invention can be similarly utilized in the case of a normal communication device.

In this case, the channel may be displayed as a frequency. Further, the timing pulse does not necessarily need to be received from a standard radio wave, and a signal from an ordinary clock may be obtained and used. Furthermore, although the time period is set to be every minute, it may be set to 3 minutes or any other suitable time period, or the time period may be set intermittently so that the child rests for a certain period of time.

Furthermore, the channel designation circuit 3 may be a calculation circuit.

In this case, the coefficients of the calculation formula are changed depending on the signal from the encoding circuit 2 and the time zone selection signal from the control circuit 5.
This specifies the channel. Further, the keyboard is not limited to this, and a crab key may be used, as long as the call sign can be input to the encoding circuit 2 with an appropriate signal. Furthermore, the number of designated channels does not necessarily have to be five, and may be one. In this case, it goes without saying that there is no need for prioritization. Furthermore,
Setting a group of reception channels in a time-division manner by time-divisionally dividing the signal from the channel specifying circuit 3 and operating a local oscillation circuit in the receiving section of the transceiver facilitates the transceiver setting operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the device, and FIG. 2 is an explanatory diagram of the contents stored in the channel designation circuit. 1...keyboard, 2...encoding circuit, 3
...Channel designation circuit, 4...Pulse generation circuit, 5...Control circuit, 6...
Reset circuit, 7... High frequency amplification circuit, 8...
Filter circuit, 9... Channel selection circuit, 1
0...Display circuit. Traditional map Figure 2

Claims (1)

[Claims] 1 A signal from a channel designation circuit that specifies a specific channel using a signal determined by the call signs of the two stations and a time slot selection signal that changes every unit time, and is a channel for communication between two specific stations in that time slot. A communication device that displays or sets.