JPH048998B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile radio paging system, and more particularly to realizing a wide area mobile radio paging system that allows paging even when a mobile station is located within the service area of another radio base station.

The conventional radio paging system has the drawback that the receiver of the mobile station can only receive a specific frequency corresponding to the service area of a specific radio base station, and cannot use it in other service areas. Therefore, users who move over a wide area need to be paged by different receivers and different call identification codes for each service area.

The purpose of the present invention is to solve the above-mentioned conventional drawbacks and
An object of the present invention is to provide a wide area mobile radio paging system that allows a mobile station to be called using the same paging identification code even when the mobile station is located outside the service area of a specific radio base station.

The calling method of the present invention includes a receiver that can receive any channel by switching a frequency synthesizer, a level determiner that determines the reception level of the receiver, and a decoder that decodes the output signal of the receiver. It has a built-in memory that stores its own call identification code, base station identification code, etc., and a code checker that matches the contents of the memory with the output code of the decoder. A mobile station that can be determined to be located in a service area of a different base station, a call identification code of the mobile station, a base station identification code corresponding to the service area in which the mobile station is located, or an exchange number and channel for the area. It has a home memory capable of storing numbers, etc., and the mobile station's call identification code and its base station identification code or switching center number and its base station identification code or switching center number sent from any telephone in another service area via the exchange in the service area. and a home exchange that updates the contents of the home memory according to a channel number, and when the mobile station is called, the mobile station is sent from a wireless base station indicated by the contents of the home memory output by the home exchange. It is characterized by calling.

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

FIG. 1 is a block diagram showing an example of a mobile station used in an embodiment of the present invention, and FIG. 2 is a block diagram of a specific radio base station (home area station) and other radio base stations in the above embodiment. FIG. 2 is a block diagram showing an exchange system with.

The mobile station 2 shown in FIG. 1 includes an antenna 3,
a receiver 4 whose reception channel is varied depending on the output frequency of a frequency synthesizer 13;
a decoder 5 for decoding received signals of the receiver 4;
a level determiner 6 that determines the reception level of the level determiner 6; a level drop indicator 7 that indicates that the reception level has fallen below a certain level based on the output of the level determiner 6; and a base station identification code decoded by the decoder 5.
a code determiner 8 that compares the SID and the call identification code PID with the code stored in the memory 9;
A memory 9 for storing a paging identification code PID, a base station identification code SID, etc., and a speaker 10 that generates a ringing tone based on a match between the code determiner 8 and the like.
, an indicator lamp 11 that displays the difference between the base station identification code SID, and a frequency synthesizer 13 that changes the oscillation frequency by operating the frequency setting button 12.
and a channel display 1 that displays a channel number corresponding to the oscillation frequency of the frequency synthesizer 13.
4, and the above channel number and call identification code.
It is equipped with an ID code recording section 16 that stores a PID and a secret password number as needed, and an ID code sending button 15 that causes the ID code recording section 16 to send out the ID code and the like.

When the mobile station 2 is located within the service area of a specific radio base station (home area station) 1, the radio base station 1 transmits a call identification code PID and a base station identification code SID to radio waves of a specific frequency. Send. The mobile station 2 receives the radio waves through an antenna 3. Now, since the frequency synthesizer 13 is set to a frequency corresponding to the above radio wave, the receiver 4
receives and amplifies the above radio waves. The output signal of the receiver 4 is decoded by a decoder 5, and the decoded code is compared with a code stored in a memory 9 by a code checker 8. When both the paging identification code PID and the base station identification code SID match, a ringing tone is generated from the speaker 10. Of course, if the base station identification codes SID match and the call identification codes PID differ, nothing will happen. However, when the base station identification codes SID are different, the display lamp 11 is turned on. This allows it to be determined that the mobile station 2 has received radio waves on the same channel in another service area. On the other hand, the reception level of the receiver 4 is determined by the level determiner 6.
When the level is below a certain level, the level drop indicator 7 lights up. The mobile station 2 can refer to these and determine that it is located outside the service area. When the user is located outside the service area, the user can be called by the base station in the service area where the user is currently located by updating the home memory, which will be described later. In that case, by operating the frequency setting button 12, the oscillation frequency of the frequency synthesizer 13 is changed so that radio waves of the corresponding channel can be received. By changing the frequency of the frequency synthesizer 13, the corresponding channel is displayed on the channel display 14, and the channel number in the ID code recording section 16 is also updated. Then, when you press the ID code sending button 15,
The contents of the ID code recording unit 16 and the corresponding base station identification code being received from the decoder are output, and the corresponding code in the memory 9 is updated. Also,
In addition to a call identification code PID and the channel number, the ID code storage section 16 also stores a secret number, and the output signal thereof is sent out as a sound from the speaker 10.

On the other hand, as shown in FIG. 2, a specific radio base station 1 is connected to a home exchange 18, and other radio base stations 20 are connected to an exchange 21 in the area. Of course, the exchanges 18 and 21 can be connected via a toll line or the like. The home exchange 18 includes a home memory 19 for storing the mobile station 2's call identification code PID, receivable channel number, base station identification code or exchange number of the service area of the current location, secret code, etc. ing. Normally, when dialing the call identification code PID from any telephone 17, the home office exchange 18
9 and confirm the call identification code, the wireless base station 1 sends the base station identification code SID and the call identification code PID to call the mobile station 2.

On the other hand, an exchange 21 connected to another radio base station 20 is equipped with a register 23, a trunk 24 for transmitting a second dial tone, and a talkie 25, and is equipped with a register 23, a trunk 24 for transmitting a second dial tone, and a talkie 25. ) 22 and dials a special number (for example, 123), a second dial tone is returned after confirming that the register 23 is empty. Then, a code having the same content as the ID code recording section 16 is sent out by operating the electronic sum machine 22. The code may be sent by dialing the telephone 22, but it is also possible to send the ID code by pressing the ID code sending button 15 with the transmitter of the telephone 22 in close contact with the speaker 10 of the mobile station 2. It can also be sent out. When the ID code sending button 15 is pressed, the memory 9 stores the output code of the decoder 5 and
The corresponding code of the ID code recording section 16 is stored. After recording the above contents in the register 23, the exchange 21 sends an announcement of registration completion to the telephone 22 from the talkie 25. Then, the contents of the register 23 are sent to the home exchange 18 with the station number of the own station added thereto. The home exchange 18 rewrites the record in the home memory 19 using the sent information. When rewriting the information, it is desirable to confirm it using a secret code, for example. The secret code is sent by operating the telephone 22 or by storing it in the ID code recording section 16 in advance. In addition, the home memory can be rewritten using the phone 22.
It may also be possible to perform this by directly connecting to the home memory 19. Thereafter, when dialing the call identification code PID from any telephone 17, the home exchange 18 refers to the home memory 19, sends the information to another exchange 21, and from the radio base station 20 dials the own base station. Identification code SID and call identification code
PID is sent. Since the memory 9 of the mobile station 2 has already been updated, both the identification codes SID and PID match, and a ringing tone is generated from the speaker 10. Since existing toll lines and/or switching networks can be used for communication between exchanges 18 and 21, a base station identification code is added to the radio waves sent from each base station, and the exchange system is configured as described above. By just making some changes to the system, it is possible to realize nationwide mobile radio calling without interfering with conventional services.

As described above, the present invention transmits a radio wave transmitted from a base station with a call identification code and a base station identification code, the mobile station is configured to be able to receive any channel, and the received call identification code and base station identification code are transmitted. Since it is configured to identify that it has been called by checking the station identification code, even if it is located in the service area of another wireless base station, it can be used from any telephone in the area via the exchange in the area. By updating the contents of the home memory provided in the home exchange, it is possible to receive a calling service. In other words, there is an effect that nationwide mobile radio calling can be realized. For this purpose, it is sufficient to make slight changes such as changing part of the switching system and adding the identification code of the base station to the radio waves transmitted from the base station.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a mobile station used in an embodiment of the present invention, and FIG. 2 is a block diagram showing an exchange system between a specific radio base station and other radio base stations in the above embodiment. be. In the figure, 1... Wireless base station, 2... Mobile station, 3
...Antenna, 4...Receiver, 5...Decoder, 6...Level judger, 7...Level drop indicator, 8...Sign judger, 9...Memory, 10...Speaker, 11...Display lamp, 12...For frequency setting Button, 13... Frequency synthesizer, 14... Channel indicator, 15...
ID code sending button, 16...ID code recording section,
17, 22...telephone, 18...home office exchange, 1
9... Home memory, 20... Wireless base station, 21... Exchange, 23... Register, 24... Trunk for second dial tone, 25... Talkie, SID... Base station identification code, PID... Calling identification code.

Claims (1)

[Claims] 1. A receiver that can receive any channel by switching a frequency synthesizer, a level determiner that determines the reception level of the receiver, a decoder that decodes the output signal of the receiver, and its own call identification code; It has a built-in memory that stores base station identification codes, etc., and a code checker that matches the contents of the memory with the output code of the decoder, so that it can be used inside or outside the service area of a specific wireless base station, or for a different base station. It is possible to store mobile stations that can be determined to be located within the area, the mobile station's call identification code, the base station identification code corresponding to the service area where the mobile station is located, or the exchange number and channel number of the area. The call identification code of the mobile station and its base station identification code or switching center number and channel number sent from any telephone in another service area via the exchange in the service area are used to and a home exchange that updates the contents of the memory, and the calling of the mobile station is characterized in that the mobile station is called from a radio base station instructed by the contents of the home memory output by the home exchange. Wide area mobile radio paging system.