JPH01298822A - Radiotelephony equipment - Google Patents

Abstract

PURPOSE:To avoid time-consuming for searching an idle channel by providing an arithmetic means applying a prescribed calculation based on an identification number to a master set and discriminating an idle channel from a talking channel corresponding to the result of the calculation of the arithmetic means. CONSTITUTION:Three idle channels are prepared and the initial idle channel discriminated to be idle is used at talking and two channels are added to the channel discriminated to be an idle channel finally after the talking to assure by three idle channels again. The arithmetic means applying a prescribed calculation based on an identification number given to each slave set 33 so as to discriminate an idle channel is provided to the master set 32, then the idle channel is discriminated to be a talking channel corresponding to the result of the calculation of the arithmetic means based on the identification number. Thus, a problem of a conventional telephone set being a time-consuming searching of the idle channel is avoided, and the idle channel is calculated and discriminated quickly and the communication between the master set 32 and the slave set 33 is started immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radio telephone device, and more particularly to a radio telephone device that determines an empty channel from among a plurality of communication channels between a base unit and a slave unit.

[Conventional technology]

Multi-channel access (MCA) is a well-known method for determining available channels in conventional wireless telephone devices.
There is a method.

In this type of telephone device, if the number of channels is 89, for example, the search for an empty channel from channels 1 to 89 is performed by the base unit once for all slave units.
This is done by starting from channel number and increasing the number of channels in order from channel 2 to channel 3.

[Problem to be solved by the invention]

In this way, in conventional wireless telephone devices, all the base units start searching from the same channel in order, so there is a high probability that other slave units are using each channel while searching for an empty channel. The problem was that it took a long time to search for a channel.

[Means to solve the problem]

The present invention has been made to solve these problems, and the base unit is equipped with a calculation means that performs a predetermined calculation based on the identification number given to each slave unit to determine an empty channel. .

[For production]

The vacant channel is determined to be a communication channel corresponding to the calculation result of the calculation means based on the identification number.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 3 is a block diagram schematically showing a system of a wireless telephone device according to an embodiment of the present invention.

In the figure, a base unit 32 having a handset 31 is wirelessly connected to a slave unit 33, and the base unit 32 is provided with a call button 34 for making a busy call to the slave unit 33. , outside line and doorbell 3
5 is connected.

Further, FIG. 1 is a block diagram showing the circuit configuration of the base unit 32 of the above wireless telephone device, and FIG. 2 is a block diagram showing the circuit configuration of the slave unit 33.

In FIG. 1, the base unit 32 includes a call circuit 1 for the base unit and a call circuit 2 for the slave unit. Both communication circuits 1 and 2 are circuits that convert from 2 wires to 4 wires. A handset (handset 31) 3 equipped with a speaker and a microphone is connected to the 4-wire side of the communication circuit 1, and a wireless transmitting/receiving section 4 is connected to the 4-wire side of the communication circuit 2.

The wireless transmitting/receiving section 4 includes a transmitting section, a receiving section, and a synthesizer part 2.
It consists of a duplexer. Reference numeral 5 denotes an out-of-call detection circuit which extracts the received signal from the wireless transmitting/receiving section 4 and determines that the call is out of range when the signal level falls below a certain value.

Connected to the 2-line side of the base phone call circuit 1 are a switch 6 that connects and disconnects the call loop, a rectifier circuit 8 that rectifies the local current, and a relay 10 that switches between an extension line and an outside line.

Relay 10 is normally held on the extension 19 side, and C
Based on support from the PUI 7, an outside line, that is, a central office line, is connected via a rectifier circuit 8 and a switch 6. Further, a door phone circuit 22 controlled by the CPU 17 is connected to the extension 19 side.

Similarly, the handset communication circuit 2 includes a switch 7 for connecting and disconnecting the communication loop, and a rectifier circuit 9. It is connected to the telephone port vAL via a relay 11 for switching between internal and external lines.

The switch 6.7 is controlled to open and close by the switch control means 12.13.
2.13 to CPU 17 and dialer 14. A signal is input from the music-on-hold circuit 16.

The dialer 14 receives input from a dial key (numeric keypad) 15 provided on the operation unit of the base unit 32 and receives input from the CP1.
This is means for outputting a DP signal or a PB signal based on an input from a dial key in the operation section of the slave unit provided via 7. The hold sound circuit 16 is a means for transmitting hold music based on the input from the hold key 20 provided in the operation section of the base unit and the input from the hold key in the operation unit of the slave unit given via the CPU 17. be.

The tone output circuit 23 outputs a tone signal under the control of the CPU 17 when the busy call button 34 is pressed, and this tone signal is sent to the speaker 2.
4 is emitted as voice, and the communication circuit 2
The mixed signal is mixed with the audio signal from and input to the wireless transmitting/receiving section 4.

Further, the IDROM 21 is a ROM that stores the identification (ID) code of each handset connected wirelessly, and the switch 18 is a hook switch that detects the hook state of the handset 31 of the base unit 32. .

In FIG. 2, the handset 33 includes a wireless transmitting/receiving section 40, a transmitting/receiving section 41 . The output signal from the out-of-call detection circuit 44, which extracts the received signal from the operation unit 42 and CPU 43 and determines that the call is out of range when the signal level falls below a certain value, causes the alarm sound generation unit 45 to detect that the received signal is out of the call range. Notify. The mute circuit 46 mutes the signal from the wireless transmitter/receiver 40 when the received signal is out of the communication range, and the ringer generator 47 outputs a tone ringer signal when an incoming signal arrives at the wireless transmitter/receiver 40. Emits a ringing sound.

Through communication between the wireless transmitting/receiving section 40 and the wireless transmitting/receiving section 4 on the base unit side, the transmitting/receiving section 41 operates as if it were directly connected to the communication circuit 2. In addition, the operation section 4
2 is composed of a dial key, a call key, a call end key, a hold key, etc., and an IDROM 49 stores an ID code given to each handset.
This DROM49 and the IT machine side IDROM2 mentioned above
The ID codes stored in 1 and 1 are similarly configured.

These ID codes are composed of 25 bits, and the lowest 1 bit indicates whether the ID code is an odd number or an even number, and the control channel for each ID code is determined by this even number or odd number. The other 24 bits are pure ID information for identifying each slave device.

The number of channels is 89 in total, and the control channel is allocated to two channels, the 46th channel and the last 89th channel.

Therefore, the number of channels that can be used as speech channels is 87, excluding two control channels.

Next, the operation of this embodiment will be explained below with reference to the flowchart of FIG.

In the figure, first, the base unit 32 determines whether or not it is the initial time of the system settings (step 301), and if it is the initial time, the I/O is controlled by the CPU 17.
The ID code stored in the DROM 21 is read (step 302).

Once the ID code is read, this code is shifted to the right by one bit, excluding the least significant bit containing control channel information, resulting in data having only a 24-bit ID code (step 303).

Next, this 24-bit ID code is divided by 87 (decimal number), which is the number of communication channels mentioned above (step 304).
Furthermore, since the remainder of this division result is 0 to 86 and there is no 0 channel, 1 is added to this remainder to make it 1 to 87, and an empty channel is set (step 305). If the remainder is 45, 2 is added to it to avoid channel 46, which is a control channel (step 306), and the calculation result is set in the empty channel detection area (step 307).

Next, following the process of step 307, or if it is not the initial time in step 301, for the time set by the channel timer based on the calculation result,
An empty channel detection process is performed to determine whether the empty channel obtained by the calculations in the above process is actually empty (step 308), and it is determined whether the empty channel based on the calculation result is actually empty (step 309). ). If the channel is free, set the free channel obtained by this calculation as the actual free channel (step 310). Following this step 310, or if the judgment result in step 309 is that the channel is not free, then: Determine whether 3 free channels have been set (
Step 311).

If 3 channels have not been set, 2 is added to the empty channel detection area (step 312), and the processes from step 301 onwards are repeated, and if 3 channels have been set, 1 is already set. Since the number of channels has been used, 2 is added to the vacant channel detection area (step 313) and the process is ended.

In the above process, normally three free channels are prepared, and during a call, the first free channel determined to be free is used, and after the call, 2 is set to the last channel determined to be free. In addition, three free channels are re-secured.

〔Effect of the invention〕

As explained above, the present invention provides a base unit with calculation means that performs a predetermined calculation based on the identification number given to each slave unit to determine an empty channel. (It is determined that the communication channel corresponds to the calculation result of the calculation means.

Therefore, the conventional problem of taking a long time to search for an empty channel is resolved, and the empty channel is quickly calculated and determined, and communication between the base unit and the slave unit can be started immediately. This has the effect that it is possible to obtain a telephone device that can be used.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the circuit configuration of a base unit according to an embodiment of the present invention, FIG. 2 is a block diagram showing the circuit configuration of a slave unit according to this embodiment, and FIG. 3 is a block diagram showing the circuit configuration of a slave unit according to this embodiment. FIG. 4 is a flowchart for explaining the operation of this embodiment. 1.2...Telephone circuit, 3...Handset, 4°40.
・・Wireless transmitter/receiver unit, 12.13 ・・Selector switch, 1
4...Dialer, 16...Tone on hold circuit, 17.43
...CPU, 21.49...IDROM, 41...
- Transceiver section, L...External line. Patent applicant: Tamura Electric Manufacturing Co., Ltd. Agent: Kazumi Yamakawa (two idiots)

Claims (1)

[Claims] Consisting of a base unit connected to a central office line and a slave unit wirelessly connected to the base unit, calls between the base unit and the slave unit are made after confirming that predetermined identification numbers match each other. , a wireless telephone device configured to perform communication using one communication channel determined to be free among a plurality of communication channels, wherein the base unit is provided with a calculation means for performing a predetermined calculation based on the identification number, and the calculation means of the calculation means A wireless telephone device characterized in that an availability determination is made from a communication channel corresponding to the result.