JP2002095048A - Mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a call back to surely arrive at the mobile telephone terminal of a caller, when the call back is made to the caller after the caller makes communication by calling out a specific telephone number of an emergency addressee, etc. SOLUTION: A portable telephone 10, in which a service such as the automatic answering service, incoming call transfer service, etc., can be registered, is connected to a reception base 14 via a base station 11, a mobile telephone exchange 12, and a fixed-network exchange 13. When the user of the portable telephone 10 calls a specific telephone number of a police station, firehouse, etc., and terminates the communication with the police station, firehouse, etc., and the mobile telephone exchange 12 detects the termination of the communication or the state change of the mobile telephone terminal from a call state to a power supply turned-off state, the exchange12 rewrites the service registered in the telephone 10 that makes emergency call to an unregistered state for a fixed period of time only. After terminating the communication, the call back from the reception base 14 is connected to the portable telephone 10, without being connected to the registered service, such as automatic answering service, incoming call transfer service, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system and, more particularly, to a method for responding to a call from an emergency contact such as a police or fire department when an emergency communication is performed using a mobile telephone terminal such as a portable telephone. The present invention relates to a mobile communication system capable of increasing the probability of a response of a mobile telephone terminal.

[0002]

2. Description of the Related Art Cellular phones and PHS (Personal Handyph)
One System) As a result of the number of contracted mobile telephone terminals (mobile telephone devices), such as telephones, having spread beyond the fixed telephones, communication to police and fire departments in the event of an accident (incident) or disaster has been moved. Increasing the number of cases using a mobile phone terminal is increasing. After receiving an emergency call and ending the communication, the police and fire departments call back from the emergency contact to check the location and the situation at the site (meaning a call from the called side to the calling side after disconnection. ). In response to this call back, if the mobile phone terminal owned by the caller was turned off, the call could not be made even if the call was made, and they would have trouble handling emergency situations. Conceivable.

[0003] All mobile telephone terminals operate using a battery as a power source, and the available time has been dramatically improved due to the advancement of battery performance and circuit technology. However, when the remaining amount of the battery becomes low, or when it is customary to turn on the power only at the time of use, the user turns off the power. The power switch is turned off in places where use is prohibited or restricted. In this way, when the power is turned off, the caller's mobile telephone terminal cannot respond to the call back, and thus the emergency transit destinations such as police and fire departments cannot contact the caller.

To solve this problem, Japanese Patent Laid-Open No.
No. 346185 discloses a specific telephone number (110
No., 119, etc.) are stored in the specific telephone number storage means, and the specific telephone number stored in the specific telephone number storage means is compared with the telephone number inputted for making a call, and they match. Sometimes, a lock signal is output from the specific telephone number comparing means, and when the lock signal is received by the power control means, a timer for keeping the power ON is started, and the power OFF is not permitted. This makes it impossible to turn off the power after communicating with the emergency transfer destination such as the police or the fire department. As a result, it becomes possible to respond to the call from the emergency transfer destination such as the police or the fire department.

[0005]

However, according to the conventional mobile communication system, although the success rate of the call back is increased by the continuation of the power-on, the owner of the mobile telephone terminal can answer the answering machine, call transfer, etc. When the service is registered, the call may be received by the answering machine or the call may be transferred to the destination telephone when the call is returned by an emergency call. Also, if the caller of the emergency call turns off the power of the mobile telephone terminal immediately after making the call, there is a problem that the mobile telephone terminal cannot receive a call back.

Therefore, an object of the present invention is to ensure that a call is returned to a mobile telephone terminal of a caller when a call is returned after performing a call operation to a specific telephone number such as an emergency transfer destination. It is an object of the present invention to provide a mobile communication system as described above.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a mobile telephone terminal capable of performing communication by radio waves and registering services such as answering machine and call transfer. In a mobile communication system including a mobile telephone exchange that performs an exchange process according to a call from a telephone terminal, the mobile telephone exchange transmits a specific telephone number such as an emergency contact number from the mobile telephone terminal. After calling and ending the communication, the service of the mobile telephone terminal is detected based on the detection of the end of the communication or the detection of a change from the talk state to the power-off state of the mobile telephone terminal. It is an object of the present invention to provide a mobile communication system characterized in that registration is rewritten from a registered state to an unregistered state, and this state is maintained for a preset time and then returned to the registered state.

[0008] According to this configuration, when the mobile telephone terminal calls a specific telephone number such as a police station or a fire station and terminates the communication, the mobile phone terminal thereafter responds to a call back from the called side such as the police station or the fire station. In order to be connected to the mobile phone terminal without being connected to service registration such as answering machine or call forwarding, the communication is terminated, or the mobile phone terminal is switched from a call state to a power off state. Is detected, the service registration is rewritten from the registered state to the last registered state by the mobile telephone exchange for a certain period of time. This allows police,
The probability that the mobile telephone terminal responds to a call back from the called side such as a fire department can be increased.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a mobile communication system according to the present invention. FIG. 1 shows a mobile communication system according to the present invention. In the following, it is assumed that a mobile telephone is used as a mobile telephone terminal device. The mobile phone 10 can be used by becoming a subscriber in accordance with a contract with a telecommunications carrier, and can be used for other mobile phones, PHS, which is another communication method of a mobile phone terminal, a mobile phone such as a car phone, or a wired phone. A call can be made with a fixed telephone, and the call is made by connecting to the base station 11 by radio waves. A mobile communication exchange 12 is connected to a mobile communication base station 11 (hereinafter, referred to as base station 11), and a fixed network exchange 13 is connected to the mobile communication exchange 12. The fixed network exchange 13 is connected to reception desks 14 for police, fire and the like.

When the user (caller) of the portable telephone 10 dials the emergency call specific number (110 or 119), the call signal is received by the base station 11.
This outgoing radio signal is further transferred to the mobile telephone exchange 12. The mobile communication exchange 12 analyzes a call signal from the base station 11, and passes through the fixed network exchange 13 to a reception desk 1 of a police station or a fire station near the place where the mobile phone 10 originates.
4 is made to receive a “call” of the mobile phone 10. Reception desk 14
Of the emergency call from the mobile communication exchange 12 to the reception desk 14 is confirmed by the receptionist (person in charge). The receptionist communicates with the caller of the mobile phone 10 through the reception desk 14 to make a call necessary for subsequent treatment or a call for acquiring information. In this call, when the caller disconnects the call first, the reception desk 14 has a function of calling back the user of the mobile phone 10.

The general operation of the mobile phone 10 will be described. When a caller (user of the mobile phone 10) terminates an emergency call by the operation of the caller, the mobile phone 1 is activated.
The power supply 0 is automatically turned on for a preset time length. When detecting that the emergency call of the mobile phone 10 has ended, the mobile communication exchange 12 automatically rewrites a part of the service registration from the registered state to the unregistered state for a preset time length. This prevents the power of the mobile phone 10 from being turned off, prevents the incoming call to the answering machine, the transfer to the transfer destination phone, and the like, and the probability of success in returning the called mobile phone 10 Is improved. Therefore, it is possible to improve the delay of police and firefighting activities due to the loss of a call.

FIG. 2 shows a detailed configuration of the portable telephone 10 shown in FIG. The mobile phone 10 includes an antenna 101, a wireless unit 1
02, communication control unit 103, information processing unit 104, ROM
(Read only memory) 105, RAM (random access memory) 106, audio control unit 10
7, microphone 108, speaker 109, LED (light emitting diode) control unit 110, input control unit 111, display control unit 112, LED 113, input unit 114, display unit 11
5, an emergency call detection circuit 116, and a power supply holding circuit 117.

The antenna 101 is a rod antenna which is attached to the upper part of a telephone body (not shown) so as to be able to expand and contract. The radio unit 102 includes a transmission circuit (both not shown),
It includes a receiving circuit and a PLL (phase locked loop) circuit to transmit and receive radio waves. The communication control unit 103 performs reception control and transmission control for the wireless unit 102. The information processing unit 104 performs processing for information and display obtained by input operation and reception. The ROM 105 stores a program for executing a communication (telephone) function and various functions other than communication (an electronic organizer function, a telephone directory function, a recording function, a mail function, a schedule function, a game function, and the like). The RAM 106 stores a telephone number, setting contents, personal information, information acquired by reception, and the like input by the user. The audio control unit 107 processes audio from the microphone 108 as a transmitter and the speaker 1 as a receiver.
09 is performed. The LED 113 is used for lighting when receiving a call or charging, and the lighting control is performed by the LED control unit 11.
Performed by 0. The input control unit 111 includes an input unit 114
Process input from (including numeric keys, symbol keys, function keys, etc.). The display control unit 112 controls the display of the display unit 115 by the liquid crystal.

The emergency call detection circuit 116
Detects that the emergency call has been disconnected by the operation of the end button (or the power-off button) by the user (caller). When receiving the emergency call disconnection information 118 from the emergency call detection circuit 116, the power holding circuit 117
The power is continuously supplied to each unit for a certain period of time. In this state, even if the user performs an operation of turning off the power of the mobile telephone terminal 10, the power cannot be turned off.

FIG. 3 shows a detailed configuration of the mobile telephone exchange 12. The mobile telephone exchange 12 includes a central processing unit 121 as a detecting means, a subscriber data memory 122 as a storing means for storing service registration data 123 (data relating to services such as answering machine and call forwarding), and service registration control. A circuit 124 is provided. The central processing unit 121 detects an end signal of the emergency call from the mobile phone 10 (or a signal indicating a change from the communication state of the emergency call to the power OFF). Service registration control circuit 12
4 executes processing for rewriting the registration data of the service registration data 123 for the mobile phone 10 from a registered state to an unregistered state for a preset time based on an instruction from the central processing unit 121. Subscriber data memory 122
, A semiconductor memory, a hard disk, or the like can be used.

FIG. 4 shows the operation of the mobile communication system of the present invention. FIG. 4 shows a communication procedure between the mobile phone 10 and the reception board 14. In the figure, S represents a step. Next, the operation of the mobile communication system of the present invention will be described with reference to FIGS. When the user of the mobile phone 10 dials (calls) an emergency specific number (110 or 119) from the mobile phone 10 (S20).
1) The call signal is sent to the base station 11 by radio waves. The base station 11 transfers the received calling signal to the mobile telephone exchange 12. In the mobile telephone exchange 12, the central processing unit 121 performs a call signal analysis process,
If the request is an emergency call connection request, the call is made to arrive at the police or fire reception desk 14 via the fixed network exchange 13 (S202). When the receptionist (person in charge) of the reception desk 14 answers (S203), the user of the mobile phone 10 can start a call (S204). After this call ends (S
205), the caller of the emergency call is
When the connection is disconnected by operating the 14 end button (or power OFF button) (S206), the emergency call detection circuit 1
16 detects the disconnection and sends a power holding request signal 118 to the power holding circuit 117. The power holding circuit 117
Upon receiving the power holding request signal 118, the mobile phone 10
Power supply to each part of the
N is set (S207). After the elapse of the set time t, the power can be turned off by the user (S213).

When the mobile telephone exchange 12 detects the disconnection of the call by the central processing unit 121, the service registration control circuit 1
Start 24. When the service registration control circuit 124 is activated, the service registration such as an answering machine service and an incoming call transfer among the service registrations of the subscriber who has transmitted the emergency call stored in the service registration data 123 in the subscriber data memory 122 is started. Is released to bring it into an unregistered state (S208).
Thereafter, when recognizing the elapse of the preset timer time t, the service registration control circuit 124 executes a process of returning the released service registration to the registered state (S214).
This makes it possible to use registered services such as answering machine and call forwarding.

When there is a call back from the reception board 14 within the set time t (= timer time t) (S209),
The call is sent from the fixed network exchange 13 to the mobile telephone exchange 12 →
The mobile phone 10 arrives at the mobile phone 10 via the base station 11 (S210). Since the power of the mobile phone 10 has been kept on and the service registration has not been registered, the mobile phone 10 can be reliably called and the call (S211) can be reached. After the end of the call (S212), the power of the mobile phone 10 can be turned off at the set time t (213). When the timer time t has elapsed, the mobile telephone exchange 12 returns the service from the end registration state to the registration state (S214), and returns to the state before calling the emergency specific number.

In the above embodiment, the subscriber data memory 122 (storage means) secured in the mobile telephone exchange 12 is replaced with a dedicated node outside the mobile telephone exchange 12, and this node and the mobile The configuration may be such that the telephone exchange 12 is connected. This makes it easy to change, expand, or replace the storage means. Furthermore, in the above-described embodiment, a mobile phone is used as a mobile phone terminal device. However, the present invention is not limited to a mobile phone. Telephone, which can be provided with services such as answering machine, call forwarding, etc.
Needless to say, HS phones and car phones are also applicable to the present invention.

[0020]

As is apparent from the above description, according to the mobile communication system of the present invention, the mobile telephone terminal issues an emergency call such as police or fire by a specific telephone number and terminates the communication or When detecting a change from the call state to the power-off state of the mobile telephone terminal, the service registration is rewritten from the registered state to the last registered state by the mobile telephone exchange for a certain period of time. Can be prevented from being connected to the mobile telephone terminal, and the probability that the mobile telephone terminal responds when a call is returned from the other party of the emergency call can be increased.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a mobile communication system according to the present invention.

FIG. 2 is a block diagram showing a detailed configuration of the mobile phone shown in FIG.

FIG. 3 is a block diagram showing a detailed configuration of the mobile telephone exchange shown in FIG. 1;

FIG. 4 is a sequence diagram showing an operation of the mobile communication system of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 mobile phone 11 base station 12 mobile telephone exchange 13 fixed network exchange 14 reception desk 102 wireless unit 103 communication control unit 104 information processing unit 114 input unit 116 emergency call detection circuit 117 power supply holding circuit 121 central processing unit 122 subscriber data memory 123 service registration data 124 service registration control circuit

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Claims (5)

[Claims] A mobile telephone terminal capable of registering services such as answering machine and call transfer while communicating by radio waves, and a mobile unit performing an exchange process in response to a call from the mobile telephone terminal. In a mobile communication system including a telephone exchange, the mobile telephone exchange calls a specific telephone number such as an emergency contact number from the mobile telephone terminal to end communication, and then detects the end of the communication. Or the service registration of the mobile telephone terminal is rewritten from a registered state to an unregistered state based on detection of a change from a call state of the mobile telephone terminal to a power-off state, and this state is set in advance. A mobile communication system characterized by returning to the registered state after holding for a predetermined time. 2. An emergency call detection circuit for detecting disconnection of an emergency call by detecting a call termination operation or power-off operation of the mobile telephone terminal, and wherein the emergency call detection circuit detects an emergency call. 2. The mobile communication system according to claim 1, further comprising a power holding circuit for turning on power supply to each unit in the mobile telephone terminal for a predetermined time upon detecting disconnection. 3. The mobile telephone terminal comprises: a mobile phone;
2. A PHS (Personal Handy Phone System) telephone or a car telephone.
Or the mobile communication system according to 2. 4. The mobile telephone exchange, a storage means for storing service registration data relating to the service registration of the mobile telephone terminal, an emergency call termination signal from the mobile telephone terminal, or Detecting means for detecting that the mobile telephone terminal has been turned off from a call state; and detecting the mobile phone terminal from the call end signal or the power off state by the detecting means, and performing the movement for a preset time. The mobile communication system according to claim 1, further comprising a service registration control circuit for rewriting the service registration data of the mobile phone terminal from a registered state to an unregistered state. 5. The mobile communication system according to claim 4, wherein said storage means is a dedicated node provided separately from said mobile telephone exchange.