JPH01268230A - Multiple channel selectively calling device - Google Patents

Abstract

PURPOSE:To automatically switch a radio channel to the radio channel automatically calling its own radio equipment when a receiving input declines by constituting a calling ID of a high order group ID and low order Number 4000 ID and assigning plural radio channel numbers and time slots to each group. CONSTITUTION:Radio equipment section 1, a CPU 2 which controls the operation of this device, a signal receiving section 3, and a ROM 4 which stores used channel numbers and calling IDs (group IDs and low order IDs) are provided. Since plural radio channel numbers and time slots are assigned to each group, a new channel can be caught by performing reception by successively switching the channels stored in the ROM 4 when signal reception becomes impossible by a using channel and time slot. Moreover, in case of receiving signals with a switched channel, the channel switching can be made to a proper channel by stopping the reception when the group of a give time slot is not proper.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multi-channel selective calling device that efficiently and individually calls subscribers who move over a wide area.

(Prior Art) Conventionally, in order to use a multi-channel selective calling device in a wide area, the radio channel in the area receiving service is switched to receive the standby signal. It varies. Furthermore, even on the same radio channel, the time slots differ depending on the region, so there are times when the caller ends up waiting in vain where there is no call.

(Problem to be Solved by the Invention) However, if the time slots in which the calling signal is sent out differ depending on the group, the own machine may receive radio waves from an area that is not registered as a service area, and as a result, there will be timeslots where there is no calling. There was a problem where people had to wait unnecessarily and miss important calls.

The present invention is intended to solve such problems, and aims to provide a new multi-channel selective calling device that can automatically call its own device on the radio channel when the reception input decreases. This is the purpose.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a multi-channel switching radio receiver and a signal receiver that receives a calling signal and announces the arrival by displaying an incoming call and sounding a ring tone. A multi-channel selective calling device consisting of a CPU that controls these operations includes a ROM memory that stores the reception channel number assigned to the own machine and the time slot number to which the own machine number is transmitted. , frequency synthesizer and VC for receiving multiple channels given
A local oscillation unit consisting of a group number, a group number determination circuit that takes in the upper m bits of the call ID to determine whether the number belongs to the own group, and a determination signal that determines that the number belongs to the own group, and the above channel A call standby circuit that waits for a call from the device, a call display circuit that detects the call ID of the own device and generates a call display and a ring tone alert, and a control circuit that controls the multi-channel radio receiving device. Ru.

(Function) The present invention operates as follows due to the above-described functional configuration.

(1) Multiple radio channel numbers and time slots are assigned to each group, so when it becomes impossible to receive signals on the channel and time slot being used, the channels stored in the ROM can be switched sequentially. can receive and acquire new channels.

(2) Even if you change the channel and receive the signal,
When a given time slot group is different, reception can be stopped and switched to the correct channel.

(Embodiment) FIGS. 1 to 3 show the configuration of an embodiment of the present invention. FIG. 2 shows an example of grouping of calling numbers (ID). The calling number is 21G=65;
1 to 60,000 of 536 are used.

Now, group number (group ID) 2' = 15 excluding 0000 < 15, and subscriber ID 212 =
All zeros are removed from 4096 (60,000 units are displayed and identified as a combination number of 4,000).

FIG. 1 is a functional block diagram of a multi-channel selective calling device, in which 1 is a radio section, 2 is a CPU that controls the operation of this device, 3 is a signal receiving section, 4 is a channel number to be used and a calling device. ROM for storing (group ID and lower ID), 5 is a ringer reset switch (RS-S
W), 6 is the channel switch (CH-8W), 7
is a multi-stage power switch, 8 is a channel number indicator, 9 is a
10 is a frequency synthesizer, 11 is a power supply battery, 21 is a crystal oscillator for the clock signal of the CPU 2, 31 is a crystal oscillator for the clock signal of the signal receiver 3, and 32 is a ring tone and ring display section; In the signal decoder section, 33 is a driver for the LCD 8, in the call display section 9, 91 is a call buzzer, 92 is an LED (red) that blinks when a call is made, 93
is the area display LED (green). In the power switch 7, ■ is the switch/OFF, ■ is the switch 0N-1, and ■ is the switch OFF.
is switch 0N-2.

Now, according to ROM4, channels 1, 4, 7° 10, 1
There is a device to which 5 channels of 3 are assigned and time slots 1, 13, 10, 7, and 4 are assigned as its own channel and time slot for the above channels.

The call ID of this device is any number from 0000 to 3999. As explained above, 0000-3999
The group ID is 1 (0001), and the lower number is any number from oooo to 3999, for example 2.
It is number 345.

Next, the operation of the above embodiment will be explained based on the flow shown in FIG.

After starting, in step 1 the channel number is read out from the ROM 4 and set in the CPU 2, and in step 2 the standby mode enters the receiving state. In step 3, it is checked whether the frames are synchronized. If the frames are not synchronized, a time count is started, and if the time is less than a second, the process returns to step 2 and the standby mode continues in the receiving state. When a second has elapsed in step 4, the answer is YES and the channel CH is advanced by one in step 5. In step 6, it is checked whether all switching channels have been switched. If all the switching channels have not been switched yet, return to step 2 and repeat the above operation. All channels (5C
When the channel is switched (5 times in the case of H), the channel returns to the first channel. In this case, the vehicle determines that it is in a dead zone and leaves the dead zone. After waiting C minutes in step 8, clear all time counters and number of times counters, and return to step 1 to save the ROM.
Read the channel number from 4.

Next, if frame synchronization is achieved in step 3,
Upon receiving the time slot specified in ROM4, step 1. OA imports m bits from the beginning of the call ID 1,
Step IOB Verifies whether it matches the group signal of its own machine.

If it does not match the signal of your own aircraft group in step 10B, repeat confirmation for b seconds in step 11, and if it still does not match the signal of your own aircraft group, proceed to step IO.
Return to A. When b seconds have elapsed, the answer is YES and the channel advances by one in step 5. If all channels have not been searched, the standby state in step 2 returns to the receiving state.

Next, if the signal matches the signal of the own aircraft group in step IOB, the time slot is set to the time slot currently being received in step 12, and the channel number currently being received is displayed on the CH display 8 in step 13. At the same time, all counters are cleared in step 14, and own aircraft I is cleared in step 15.
D is in the standby state. If there is no signal for your own machine ID, continue waiting for your own machine to receive a call. When your machine ID is called in step 15, select YES and press green L.
It lights up the ED to display the incoming call from your own machine, and also sounds the buzzer. Here, when the reset switch is turned on, the buzzer sound is stopped. Alternatively, when a predetermined period of time elapses in step 17 and a timeout occurs, the operation in step 16 is stopped. When the predetermined time has elapsed, the call is stopped in step 18, and the process returns to step 15 to enter automatic ID standby.

Next, the step IOB determines the group ID of the own device by checking the first m bits of the 16 bits of the call ID, in this case the group is 15, so 24 = 16 excluding 0000 and <15. Become. Call ID is 1-399
The ID of 9 is 000j, the ID of 4000 to 7999 is 00
IDs from 10.56000 to 59999 will be represented by 1111. This is easier than taking in the 12 bits representing 1-3999 and matching them.

(Effects of the Invention) As is clear from the second embodiment, the present invention has the following effects.

(1) Set the call ID to the upper group ID and lower 4,0
By configuring it from ID number 00, the number structure can be simplified.

(2) Since the call ID consists of group ID X4000, the first m bits out of all 16 bits,
For example, group determination can be made by comparing 4 bits (16).

(3) Multiple radio channel numbers and time slots are assigned to each group, so if a signal cannot be received on the channel and time slot being used, the channels stored in the ROM can be switched in sequence. hand,
You can capture new channels assigned to your aircraft.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of the multi-channel selective calling device of the present invention, and FIG. 2 is a functional block diagram of the multichannel selective calling device of the present invention.
FIG. 3, which is a diagram showing the relationship between slots, is an operational flow diagram of the present invention. 3...Signal receiving section, 4...ROM, 8...CH
Number display, 32...Data decoder. Patent applicant Matsushita Electric Industrial Co., Ltd. 3rd START ROM to CH-N. Set up call 21

Claims (1)

[Claims] A multi-channel selective calling device comprising a multi-channel switching radio receiver, a signal receiving unit that receives a calling signal and notifies the incoming call by displaying an incoming call and sounding a ring tone, and a CPU that controls these operations, A local oscillator consisting of a ROM memory that stores the receiving channel number given to the own machine and the time slot number in which the own machine number is transmitted, and a frequency synthesizer and VCO for receiving the given multiple channels. a group number determination circuit that determines whether the number belongs to the own group by taking in the upper m bits of the call ID, and waits for a call to the above channel based on a determination signal that determines that the number belongs to the own group. It is characterized by being comprised of a call standby circuit, a call display circuit that detects the call ID of its own device and generates a call display and a ring tone alert, and a control circuit that controls the multi-channel radio receiving device. Multi-channel selective calling device.