JPS5927634A - Wide range mobile radio calling system - Google Patents

Abstract

PURPOSE:To call out a mobile station with the same callout discriminating code even if the mobile station is positioned at the outside of a service area of a specific radio base station, by calling out the mobile station from the radio base station indicated with the content of a home memory outputted from a home station exchange. CONSTITUTION:When dialing a special number from a telephone set 22, an exchange 21 confirms an idle state of a register 23 and returns a dial tone. The code having the same content as that of an ID code recording section is transmitted with the operation of the telephone set 22. The exchange 21 records the said content to the register 23 and transmits the announce of the end of registration from a talkie 25 to the telephone set 22. The content of the register 23 is added with a station number of the own station and the result is transmitted to a home station exchange 18. The home station exchange 18 rewrites the recording of a home memory 19 with the transmitted information. When dialing a calling discriminating code PID from a telephone set 17, the home station exchange 18 refers to the home memory 19 to transmit the information to the other exchange station 21 and the discriminating symbol from the radio base station 20.

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.

In the conventional radio paging system, the receiver of the mobile station is
The disadvantage is that only specific frequencies corresponding to the service area of a specific radio base station can be received and cannot be used in other service areas.

Therefore, users who move over a wide area need to be paged by a different receiver and with a different call identification code for each service area.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional drawbacks and provide a wide area mobile radio paging system that allows a mobile station to be called using the same call identification code number even when the mobile station is located outside the service area of a specific radio base station. To do □There are certain things.

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. A specific σ) wireless base station service that includes a memory that stores its own call identification code, base station identification code, etc., and a code checker that checks the contents of the memory and the output code of the decoder. A mobile station that can be determined whether it is located outside or outside the area or within the service area of a different base station, and exchange of the mobile station's call identification code and the base station identification code corresponding to the service area in which the mobile station is located or the area. It has a home memory capable of storing station numbers, channel numbers, etc., and the mobile station's call identification code and its base station identification code or its base station identification code sent from any telephone in another service area via the exchange in the service area. a home exchange that updates the contents of the home memory with an exchange number and a channel number, and the call to the mobile station is made from a radio base station instructed by the contents of the home memory output by the home exchange. The method is characterized in that the mobile station is called.

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 one embodiment of the present invention, and FIG. 2 is a block diagram showing 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 the frequency synthesizer 3, and a decoder 5 that decodes the received signal of the receiver 4. a level determiner 6 for determining the reception level of the receiver 4; a level drop indicator 7 for indicating that the reception level has fallen below a certain level based on the output of the level determiner 6; Base station identification code S
A code determiner 8 that checks the ID and the call identification code PID with a code stored in the memory 9, a memory 9 for storing the call identification code PID, the base station identification code SID, etc., and the code identifier program. 11, a frequency synthesizer 13 that changes the oscillation frequency by operating the frequency setting button 12, and a channel indicator 1 that displays the channel number corresponding to the oscillation frequency of the frequency synthesizer 13.
4, and an ID that stores the above channel number, call identification code PID, and a secret code number, etc., if necessary.
The code recording section 16 and the ID from the ID code recording section 16.
It is equipped with an ID code sending methane 15 for sending out a code, etc.

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 wave.The output signal of the receiver 4 is as follows.

The decoded code is decoded by the decoder 5, and the decoded code is sent to the sign determiner 8.
The code stored in the memory 9 is compared with the code stored in the memory 9. Call identification code PID and base station identification code SID
When both match, a ringing tone is generated from the speaker 10. Of course, when the base station identification codes SID match and the call identification codes PID differ, neither side operates. but,
When the base station identification codes SID are different, the display pump 11 is lit. 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, and when it 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 setup button 12, the frequency synthesizer 1
Change the oscillation frequency of 3 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 the ID code sending button 15 is pressed, the ID code recording section 16 and the corresponding base station identification code being received from the decoder are output and stored in the memory 9.
The corresponding code will also be updated. The ID code storage unit 16 stores a call identification code PID and the channel number i.
In addition, a password number is also stored, and its output signal is sent out as a sound from the speaker 1o.

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. Exchange 18.21
It is of course possible to connect via long-distance 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 exchange 18 checks the home memo IJ19 to confirm the call identification code, and then dials the base station identification code SID and the call identification code PID from the wireless base station l. On the other hand, the exchange 21 connected to another radio base station 2o is equipped with a register 23, a second dial tone transmitter 24 and a talkie 25, and When a special number (for example, 123) is dialed from any telephone (for example, a public telephone) 22 connected to the exchange 21, a cylinder 2 dial tone is returned after checking that the register 23 is empty. Then, by operating the telephone 22, a code having the same content as the ID code recording section 16 is sent out. The code may be sent by dialing the telephone 22, but is it possible to bring the transmitter of the telephone 22 into close contact with the speaker 10 of the mobile station 2 and press the ID code sending button 15? Therefore, it can also be sent. When the I and D code sending button 15 is pressed, the output code of the decoder 5 and the corresponding code of the ID code recording section 16 are stored in the memory 9. 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. And register 23
The contents are sent to the home exchange 18 with the station number of the own station attached thereto. The home exchange 18 rewrites the record in the home memory 19 using the sent information. When rewriting the above,
For example, it is desirable to confirm the secret code using a secret code or the like, which is transmitted by operating the telephone 22 or by storing it in advance in the ID code recording unit 161. The home memory may be rewritten by directly connecting the telephone 22 to the home memory 19. From now on, when dialing the call identification code PID from any telephone 17, the home exchange 18
home memory] 9 and transfer the information to other exchanges 2.
1, and the wireless base station 20 sends its own base station identification code S.
ID and call identification code PID are sent. Since the memory 9 of the mobile station 2 has already been updated, both of the above identification codes SID are used.

PID matches, and a ring tone is generated from the speaker 10. Communication between the exchanges 18 and 21 can be made using existing toll lines and/or exchange networks, and a base station identification code is added to the radio waves sent from each base station, and the exchange system is as described above. By just making some changes, it is possible to realize nationwide mobile radio calling without interfering with conventional services.

As described above, the present invention can be applied to radio waves transmitted from a base station.
Transmits a call identification code and base station identification code,
The mobile station is configured to be able to receive any channel, and is configured to identify that it has been called by comparing the received call identification code and base station identification code. Even when located in the home office, it is possible to receive a calling service from any telephone in the area by updating the contents of the memory of the home exchange via the exchange in the area. 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 a part of the exchange system and adding and reproducing the identification code of the base station to the radio waves transmitted by 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 invention, and FIG. 2 is a block diagram showing an exchange system between a specific radio base station and another radio base station 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... Code judger, 9... Memory,
10... Speaker, 11... Display lamp,
12...Frequency setting button, 13...Frequency non-seizer, 14...Channel indicator,
15...■D code sending button: ノ, 16...I
I) Code recording section, 17.22...telephone, 1
8... Home station exchange, 19... Home memory, 20... Radio base station, 21... Exchange,
23...1/sister, 24...2nd dial toe:/tora, yri, 25...talkie-1SID.
...Base station identification code, PID...Call identification code. Applicant Nippon Telegraph Telephone Public Corporation Agent Patent Attorney Jumi 1) Toshi Mune Figure 1 (1 1 1' L --------m-----==- Figure 2 et al./2

Claims (1)

[Claims] 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, call identifier. It has a built-in memory for storing base station identification codes, etc., and a code checker for comparing the contents of the memory 1) with the output code of the decoder. Stores a mobile station that can be determined to be located within a service area, a call identification code of the mobile station, a base station identification code corresponding to the service area where the mobile station is located, or an 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 through the exchange in the service area and a home exchange that updates the contents of the home memory, and the calling of the mobile station is characterized in that the mobile station is called from a wireless base station instructed by the contents of the home memory output by the home exchange. Wide area mobile radio paging system.