JPH0371820B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a communication device having multiple communication channels.

Prior Art FIG. 2 is a block diagram showing a conventional example. 1 is a receiving antenna, 2 is a receiving section, 3 is a transmitting antenna, 4 is a transmitting section, 5 is a channel control section, 6 is a receiving buffer for storing received data of the receiving section 2, and 7 is a predetermined identification code stored therein. I have an ID,
8 is a comparator that detects a match between the data in the receiving buffer 6 and the identification code in the ID buffer 7; 9 is an ID
A transmission buffer is used when transmitting the identification code of the buffer; 10 is an empty channel detecting section for detecting that a communication channel for calling is unused; and 11 is a calling instruction signal generating device.

Now, when the operator presses a paging switch (not shown in FIG. 2) at the calling station, the paging instruction signal generator 11 instructs the empty channel detection section 10 to detect an unused channel.

Then, when the receiving section 2 receives the communication channel specified by the channel control section 5 and the empty channel detecting section 10 determines that this communication channel is unused, the empty channel detecting section 10 detects the ID.
The buffer 7 is instructed to transmit the identification code, and the identification code is continuously transmitted from the transmitter 4 via the transmission buffer 9. On the other hand, the station on the called side sequentially scans all communication channels specifying the channel control section 5. Reception data detected by the reception unit 2 in each communication channel is stored in the reception buffer 6. When the comparator 8 detects a match between the identification code of the ID buffer 7 and the received data of the receiving buffer 6, it instructs the channel control section 5 to scan the communication channel. A communication channel is established through the above processing procedure.

Problems to be Solved by the Invention However, when the distance between communicating stations is extremely short, if a paging signal with a selectivity higher than the selectivity of the adjacent channel of the receiving section is input to the receiving section, the communication channel near the calling station There were cases where the identification code was detected on the communication channel and the communication channels did not match, which was a problem.

Furthermore, the following problem occurs. When different groups with different identification codes are communicating over a very short distance, even if a calling station in the same group transmits an identification code, non-linear distortion of the high frequency amplifier and mixer in the receiving section of the called station will occur. According to
There was a problem in that cross-modulation and intermodulation occurred, and the calling station detected the identification code on a communication channel other than the communication channel to which it was transmitting the identification code, and the communication channel was not established.

In view of the above points, it is an object of the present invention to match the communication channel of a calling station and the communication channel of a called station with a simple configuration and at high speed under any conditions.

Means for Solving the Problems The present invention includes a transmitting section, a receiving section, a means for storing an identification code and communication channel information detected by the receiving section, a means for storing a predetermined identification code, and a means for storing a predetermined identification code. means for specifying the communication channels of the receiving section and the transmitting section; first comparison means for detecting a match between the identification code in the received data and a predetermined identification code; a second comparing means for detecting a match between received data and an input channel; and means for specifying the communication channel based on a detection signal of the first comparing means and a detection signal of the second comparing means. It is provided with a control means for controlling, and a means for transmitting an identification code and communication channel information in the transmission data at the time of transmission.

Example FIG. 1 shows the configuration of an embodiment of the present invention.

Here, the same parts as in the conventional example shown in FIG. 2 are given the same numbers and the description thereof will be omitted. 12 and 13 are first and second reception buffers that respectively store reception data detected by the reception unit 2;
13 stores an identification code, and 13 stores communication channel information. 14 is a first comparator that detects a match between the data in the reception buffer 12 and the identification code of the ID buffer 7; 15 is a second comparator that detects a match between the data in the reception buffer 13 and the communication channel data in the channel control unit 5; 16 is a control section 17 and 18 that controls the channel control section 5 based on the detection signals of the comparators 14 and 15.
are first and second transmission buffers, respectively, and the first transmission buffer 17 receives the identification code of the ID buffer 7 based on the instruction from the empty channel detection section 10, and the second transmission buffer 18 receives the identification code from the channel control section 5. It stores the data of the transmission channel instructed by, that is, the data on which channel to transmit.

First, the operation of the calling station will be explained. When the operator presses a paging switch (not shown in FIG. 1), a paging instruction signal output from the paging instruction signal generator 11 instructs the empty channel detection section 10 to detect an unused channel. When the empty channel detector 10 determines that the current communication channel specified by the channel control unit 5 is unused, the empty channel detector 10 instructs the ID buffer 7 to transfer the identification code to the transmission buffer 17. At the same time, the empty channel detector 10 instructs the channel control section 5 to transfer communication channel information to the transmission buffer 18.
In response to this instruction, the identification code and communication channel information stored in the transmission buffers 17 and 18 are continuously transmitted from the transmission section 4.

On the other hand, the operation of the called station will be explained. The communication channels instructed by the channel control section 5 are sequentially scanned, and the reception data detected by the reception section 2 is sequentially stored in reception buffers 12 and 13. A receiving buffer 1 in which the comparator 14 detects a match between the data in the receiving buffer 12 in which identification data is stored and the identification data in the ID buffer 7 and in which communication channel information is stored.
When the comparator 15 detects a match between the data of No. 3 and the communication channel information of the channel control section 5, the control section 16 judges the above state and transmits the communication channel information of the channel control section 5.
instructs to stop updating the channel. Through the above processing, a correct communication channel is established.

In communication channels other than the communication channel used by the calling station, due to the above-mentioned problem of selectivity of the receiving unit 2 at short distances and cross-modulation/intermodulation phenomena caused by communication of different adjacent groups with different identification codes. , the data of the receiving buffer 12 and the identification code of the ID buffer 7 are transferred to the comparator 14.
If a match is detected, the comparator 15 determines that the data in the reception buffer 13 and the communication channel information in the channel control section 5 do not match. The control section 16 detects the above-mentioned state in which the communication channel information does not match even though the identification code is detected, and instructs the channel control section 5 to set the communication channel information of the reception buffer 13. Through the above processing, the calling station moves directly to the communication channel being used, and a correct communication channel is established.

When many different groups with different identification codes communicate over many communication channels in a short distance, due to the above-mentioned cross-modulation and intermodulation phenomena, the calling station is using only one communication channel for calling.
To detect an identification code called by one's partner in many communication channels, despite the fact that the other party is a person. In the conventional example, it is extremely difficult to detect a true communication channel, but according to the present invention, it is possible to directly search for a true communication channel using received communication channel information instead of sequentially searching.

The functional blocks other than the receiving section 2 and transmitting section 4 described above can be very easily realized by a microcomputer, but they can also be realized by a logic circuit or the like.

Effects of the Invention As described above, the present invention includes a transmitter, a receiver, a means for storing an identification code and communication channel information detected by the receiver, a means for storing a predetermined identification code, and a receiver for storing a predetermined identification code. means for specifying a communication channel of the transmitter; first comparison means for detecting a match between the identification code in the received data and a predetermined identification code; a second comparison means for detecting a match between the data and the input channel;
comprising means for controlling means for specifying the communication channel based on the detection signal of the first comparison means and the detection signal of the second comparison means; and means for transmitting the identification code and the communication channel information. Therefore, under any conditions, the communication channel of the calling station can be matched with the communication channel of the called station with a simple configuration and at high speed, and this has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the communication device of the present invention, and FIG. 2 is a block diagram showing a conventional example. 2... Receiving unit, 4... Transmitting unit, 5... Channel control unit, 7... ID buffer, 10... Empty channel detection unit, 11... Calling instruction signal generator, 12, 13... Receiving buffer, 14,15...
... Comparator, 16 ... Control section, 17, 18 ... Transmission buffer.

Claims (1)

[Claims] 1. A transmitting section, a receiving section, means for storing the identification code and communication channel information detected by the receiving section, a storage means for storing a predetermined identification code, and a communication channel of the receiving section and the transmitting section. a first comparing means for detecting a match between the identification code in the received data and the predetermined identification code; a second comparison means for detecting a match; a control means for controlling the means for specifying the communication channel based on the detection signal of the first comparison means and the detection signal of the second comparison means; A communication device comprising means for transmitting communication channel information indicating the identification code and the channel at that time.