JP3970723B2 - Mobile communication system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile communication system having a mobile communication terminal such as a mobile phone, PHS (personal handy-phone system), or PDA (personal digital assistants), and more particularly, a radio wave transmission restriction mode for stopping an automatic radio wave transmission function. The present invention relates to a mobile communication system having a mobile communication terminal provided.
[0002]
[Prior art]
Mobile communication terminals such as mobile phones, PHS, and PDAs have come into widespread use as communication communication means on the move. However, since this type of mobile communication terminal emits relatively strong electromagnetic waves, it is said that there is a risk of adverse effects on various electronic devices. For this reason, particularly when a mobile communication terminal is in a communicable state in a hospital or an aircraft, that is, when radio waves are transmitted from the mobile communication terminal, a medical device, a computer in a hospital, or a computer in a cockpit May cause malfunction. Therefore, in hospitals and airplanes, it is necessary to stop radio waves from the mobile communication terminal, and make announcements and requests to turn off the power switch of the mobile communication terminal to prevent various adverse effects from occurring. Yes.
[0003]
[Problems to be solved by the invention]
By the way, the present portable communication terminal is not only a communication function but also a multifunctional portable communication terminal having various functions such as a game function, a music function, an electronic mail function, and a photo function. For this reason, when the power switch of the mobile communication terminal is turned off, there arises an inconvenience that various kinds of functions cannot be used. For example, there has been a problem that a downloaded game cannot be played, downloaded music data can be played back, and received image data (photos and videos) cannot be played back.
[0004]
There is also a problem that functions other than the communication function such as reading an incoming e-mail, registering a telephone number, and checking a schedule cannot be used. Furthermore, even if there is a call when the power switch is off, the user of this terminal cannot know that the call has been made, and accesses the switching node (switching office) or the switching node that there has been an incoming request. It was not stored in a possible node device (base station). For this reason, it was naturally impossible to know who was called.
[0005]
Therefore, the present invention has been made to solve the above problems, and even if the radio wave transmission restriction mode is set so as not to emit radio waves from the mobile communication terminal, other game functions, music functions, A mobile communication system that can use various functions such as photo functions, and functions other than communication functions such as reading incoming e-mails, registering phone numbers, and checking schedules. The purpose is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the mobile communication system of the present invention stops the automatic radio wave transmission function. Can use functions other than the radio wave transmission function It has a portable communication terminal equipped with a radio wave transmission restriction mode. When the user sets the mobile communication terminal to the radio wave transmission restriction mode, the mobile communication terminal can perform location registration even if it detects that a location registration operation associated with the location registration area change is necessary. Location registration request signal non-transmission means for preventing radio wave transmission and an incoming response signal not to be transmitted to an exchange node or a node device accessible to the exchange node even when a call is detected Notify the call on the display unit or vibration device of the terminal Call response non-sending means , An exchange node or a node device accessible to the exchange node Mobile communication terminal In the normal mode other than the radio wave transmission restriction mode, the mobile phone is provided with an incoming call history information storage means for storing the incoming call request in the storage device as incoming call history information when there is no return of an incoming response signal from Mobile communication It is characterized in that the incoming call history information storage means can be accessed from the terminal.
[0007]
In this way, when the mobile communication terminal detects a call, if the terminal does not send an incoming response signal, radio waves are not emitted from the terminal. For example, a medical device or a computer in a hospital And the computer in the cockpit can be prevented from malfunctioning. In this case, the call is notified to the owner of the terminal by the display unit or the vibration device of the terminal. For this reason, for example, the owner of the terminal in the hospital can contact the called party on a public telephone, etc., or by going out of the hospital and canceling the radio wave transmission restriction mode of the terminal, It becomes possible to contact the called party directly by the portable communication terminal.
[0008]
It also uses various functions such as game functions, music functions, photo functions, and functions other than communication functions such as reading incoming e-mails, registering phone numbers, and checking schedules. However, since radio waves are not radiated, the convenience of this type of mobile communication terminal is greatly improved. Also, when there is no incoming response signal from the mobile communication terminal, the incoming call history of the exchange node (switching station) or the node device (base station) that can access the switching node is received as incoming call history information. While being stored in a storage device, the mobile communication terminal can access this incoming call history information.
[0009]
Therefore, in the normal mode that is not the radio wave transmission restriction mode, the mobile communication terminal accesses the storage device of the switching node (switching station) or a node device (base station) that can access the switching node, and stores the incoming call history information. Can be taken out from. Further, in the radio wave transmission restriction mode, even if it is detected that the mobile communication terminal needs a location registration operation associated with the location registration area change, do not perform radio wave transmission for location registration. Yes. As a result, it is possible to prevent medical devices, computers in hospitals, and computers in the cockpit from causing malfunctions.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram schematically showing a schematic configuration of the mobile communication system of the present invention. FIG. 2 is a block diagram illustrating a configuration example of the mobile communication terminal. FIG. 3 is a flowchart showing the location registration operation of the mobile communication terminal, and FIG. 4 is a flowchart showing the call operation of the mobile communication terminal. FIG. 5 is a flowchart showing the processing operation for storing the incoming call history of the exchange node (exchange office). FIG. 6 is a sequence diagram showing an operation of reading a history of incoming calls in response to an incoming inquiry from a mobile communication terminal.
[0011]
1. Mobile communication system
Below, schematic structure of the mobile communication system of this Embodiment is demonstrated based on FIG. The mobile communication system according to the present embodiment includes a mobile communication terminal (mobile phone) 10 (indicated by 10a, 10b, and 10c in FIG. 1), for example, a radio base station (BS: Base Station) 21. (In FIG. 1, 21a, 21b, and 21c are shown) and a mobile telephone network 22 is connected to a switching center (MSC: Mobile Swtching Center; also referred to as switching node) 23. The switching center (MSC) 23 is provided with an HLR (Home Lacation Register) 24. The HLR 24 stores an in-network database that manages location information, subscriber data, and the like of all mobile phones 10 in the mobile telephone network.
[0012]
Here, when the mobile communication terminal (mobile phone) 10 compares the cell number of the cell in which the mobile communication terminal (mobile phone) is stored and the broadcast cell number, the mobile communication terminal (mobile phone) 10 becomes inconsistent The mobile terminal sends a location registration signal into the network. Receiving this, the base station 21 of the cell sends a location registration signal to the switching center (MSC) 23. The switching center (MSC) 23 converts the position registration signal into position information that can be routed and stores it in the HLR 24. That is, the cell number of the cell A is stored in the position information column stored in the HLR 24 in the mobile phone 10a belonging to the cell A. For example, when the mobile phone 10a moves from the cell A to the cell B, the mobile phone 10a is re-registered in the cell B as described above, and when the mobile phone 10a moves from the cell B to the cell C, the mobile phone 10a Is re-registered in cell C.
[0013]
The switching center (switching node) MSC 23 includes a service center 25 that provides various services to the mobile phone 10, a mail server 26 that stores mail, an answering machine 27 that stores an answering message, An incoming call history storage device 28 that stores an incoming call history for each mobile phone is connected to a billing information management server 29 that stores billing data for call charges for each mobile phone. Here, the service center 25 is provided with a service database in which various information service data such as registered user information, traffic information, weather forecasts, and news are stored.
[0014]
Further, the mail server 26 stores mail for each mobile phone, and the answering machine 27 stores a message for each mobile phone that has contracted the answering service. The incoming call history storage device 28 stores the incoming call history for each mobile phone so that it can respond to incoming calls from the mobile phone. The billing information management server 29 stores billing data for call charges for each mobile phone, and the memory area stores billing data for usage charges for specific functions for each mobile phone or each administrator base station.
[0015]
As shown in FIG. 2, the mobile communication terminal (mobile phone) 10 includes an antenna ANT, a central processing unit (CPU) 11, a ROM (Read Only Memory) / RAM (Random Access Memory) 12, Display unit 13, key input unit 14, reception unit 15 and transmission unit 16, synthesizer 17, signal processing unit 18, microphone (MIC) 18a, speaker (SP) 18b, vibrator 18c, and internal bus (Hereinafter simply referred to as “bus”) 19. Here, the CPU 11 is a system control unit that controls the operation of each unit of the mobile phone 10 by executing a telephone function program, and indicates an elapsed time during the operation or generates a timer interrupt at a specific time interval. A timer is provided.
[0016]
In the ROM / RAM 12, the ROM stores various telephone function programs for transmission processing and reception processing executed by the CPU 11, and programs such as automatic transmission processing for automatic transmission to a set destination. In the RAM, the telephone number of the other party to be automatically transmitted, the location information of the fetched own machine, the user setting data storage area, the work area of the CPU 11 and the like are set. The display unit 13 includes a display drive circuit and a display screen. The key input unit 14 includes a keyboard, and the input keys are displayed on the display screen. Each of these functional blocks exchanges data and commands via the bus 19.
[0017]
The antenna ANT is connected to the reception unit 15 and the transmission unit 16, and a synthesizer 17 is connected to the reception unit 15 and the transmission unit 16. The receiving unit 15 and the transmitting unit 16 are connected to the CPU 11 via the signal processing unit 18 and the bus 19. The signal processing unit 18 includes an audio codec circuit and a channel codec circuit. The audio codec circuit decodes a received signal or an audio signal and compresses an input transmission signal into an audio signal. The channel codec circuit performs data compression / decompression processing and scramble / descrambling processing. For example, if the received signal is data, the channel codec circuit performs descrambling processing and decompression processing of the data supplied to the channel codec circuit. And the reproduced data is output.
[0018]
In the mobile phone 10 configured as described above, when the user operates the key input unit 14 to set the radio wave transmission restriction mode, the CPU 11 controls the display unit 13 in response to this to display the display ( (Not shown) that the radio wave transmission restriction mode is set. At the same time, the CPU 11 sends a control signal to the transmitter 16 via the bus 19 and the signal processor 18 so as not to send a location registration request signal. As a result, the location registration request signal is not transmitted from the antenna ANT via the transmitter 16, and location registration is not performed. Further, even if the CPU 11 detects a call, it sends a control signal to the transmitter 16 so as not to send a call response signal (incoming radio status report signal). Thereby, even if the mobile phone 10 detects a call, it does not emit radio waves.
[0019]
Here, if the radio wave transmission restriction mode is not set, the CPU 11 executes an incoming call process in response to an incoming call of the other party. That is, the CPU 11 controls the signal processing unit 18 to output a ringing tone or ringing tone such as a ringing melody from the speaker 18b, or operates the vibrator 18c to make the user recognize the incoming call. The user recognizes “There is an incoming call (incoming call)” from the ringing tone and inputs an incoming call operation using the key input unit 14. Therefore, the connection state is established, and the CPU 11 executes a call process. That is, the voice signal of the other party is received by the antenna ANT, and the voice signal of the other party is output from the speaker 18 b via the receiving unit 15 and the signal processing unit 18.
[0020]
On the other hand, the user's voice signal is input from the microphone 18 a and transmitted from the antenna ANT via the signal processing unit 18 and the transmission unit 16. Further, the user can input a desired telephone number of the other party using the key input unit 14. When the user inputs a telephone number, in response to this, the CPU 11 controls the display unit 13 to display the telephone number on a display (not shown) of the display unit. Subsequently, when the user instructs a call using the key input unit 14, the CPU 11 executes a call process. When the connection state is established, the CPU 11 executes the above-described call processing.
[0021]
Also, in the mobile communication terminal (mobile phone) 10, an incoming e-mail notification from the mail server 26 is received by the antenna ANT, and is taken into the CPU 11 via the receiving unit 15, the signal processing unit 18 and the bus 19. Therefore, the CPU 11 executes incoming call processing in response to the incoming call notification. Specifically, the CPU 11 controls the signal processing unit 18 to output an e-mail ringing tone or ringing melody from the speaker 18b. The CPU 11 can also control the display unit 13 to display a message such as “There is a message” on the display of the display unit 13. In response to this, the user can operate the key input unit 14 to access the mail server 26 and receive an e-mail.
[0022]
Specifically, an e-mail received by the antenna ANT is once taken into the CPU 11 through the receiving unit 15, the signal processing unit 18 and the bus 19, and stored in the RAM 12 from the CPU 11 through the bus 19. When the user operates the key input unit 14 to instruct the display of the e-mail, the CPU 11 reads out the e-mail stored in the RAM 12, controls the display unit 13, and displays the e-mail on the display of the display unit 13. The text is displayed. If the user operates the key input unit 14 to instruct deletion of the e-mail after displaying the text of the e-mail, the e-mail stored in the RAM 12 is deleted.
[0023]
On the other hand, when the user operates the key input unit 14 to input a message text or a desired e-mail address and executes a call operation, the mobile phone 10 accesses the mail server 26 and transmits an e-mail. Can do. That is, an e-mail can be transmitted to a desired partner. In this embodiment, only exchange of e-mail is shown as data transmission / reception, but music data is received (downloaded) or a message input from the mobile phone 10 is transmitted to the radio base station 14 or the mobile phone network 22. It can also be transmitted to a facsimile via a fixed telephone network (not shown).
[0024]
Further, the mobile phone 10 includes a timer (not shown), and the CPU 11 controls the display unit 13 based on time information output from the timer, and displays a calendar (date), time, and the like on the display of the display unit 13. can do. When the user operates the key input unit 14 to instruct display of the schedule, the CPU 11 reads data corresponding to the schedule stored in the RAM 12 in response to this, controls the display unit 13, and displays the display unit 13. The schedule screen appears on the display. When the schedule screen is displayed, the user can input a schedule or the like using the key input unit 14. When a schedule or the like is input and the schedule is updated, the CPU 11 stores the updated schedule data in the RAM 12. Thereafter, such operations and the like are repeatedly executed.
[0025]
Further, the mobile phone 10 includes a playback circuit (not shown) and an interface (not shown) to which headphones are connected, and the playback circuit and interface are connected to the CPU 11 via the bus 19. The interface is connected to a memory card that can be attached to and detached from the mobile phone 10. Accordingly, when the user instructs playback using the key input unit 14, the CPU 11 gives a playback instruction to the playback circuit in response to this, reads out the music data stored in the memory card, and the playback circuit plays back the music data. And output to the headphones.
[0026]
2. Operation of mobile communication system
(1) Incoming operation of mobile communication terminal (mobile phone)
Next, the operation of the mobile communication system configured as described above will be described based on the flowcharts of FIGS. 3 and 4 are flowcharts showing processing operations executed by the CPU 11 of the mobile phone 10. A program for executing this processing operation is stored in advance in the ROM of the ROM / RAM 12 of the mobile phone 10. FIG. 5 is a flowchart showing the processing operation executed by the CPU of the switching center (MSC) 23. A program for executing this processing operation is stored in advance in the ROM of the switching center (MSC) 23.
[0027]
First, when the mobile phone 10 is turned on, the CPU 11 starts processing operation, and in step S30, the cell number of the cell in which the own device is located is notified. The cell number is collated to determine whether or not the cell numbers match. Here, if the cell number memorize | stored in the own machine and the cell number alert | reported from the base station 11 correspond, CPU11 will determine with "Yes" in step S30, and step S38 (refer FIG. 4). Proceed to If the cell numbers do not match, the location registration process needs to be executed, and the process proceeds to step S32.
[0028]
In step S32, it is determined whether or not the radio wave transmission restriction mode is set. Here, if the user has previously set the radio wave transmission restriction mode, “Yes” is determined in step S32 and the process returns to step S30. That is, if it is determined that the radio wave transmission restriction mode is set, the CPU 11 sends a control signal to the sending unit 16 via the bus 19 and the signal processing unit 18 so as not to send a location registration request signal. As a result, the location registration request signal is not transmitted from the antenna ANT via the transmitter 16, and location registration is not performed.
[0029]
On the other hand, if the user has not set the radio wave transmission restriction mode, “No” is determined in step S32, and the process proceeds to step S34, where the CPU 11 sends a control signal to the transmission unit 16 via the bus 19 and the signal processing unit 18. And a location registration request signal is sent out. The base station 21 of the cell that has received the location registration request signal sends the location registration request signal to the switching center (MSC) 23. The switching center (MSC) 23 converts the position registration request signal into position information that can be routed, and stores the position information in the HLR 24.
[0030]
That is, for example, the cell number of the cell A is stored in the position information column stored in the HLR 24 in the mobile phone 10a belonging to the cell A. As a result, the switching center (MSC) 23 transmits a location registration acceptance signal to the mobile phone 10 (for example, 10a) via the base station 21 (for example, 21a). As a result, the receiving unit 16 of the mobile phone 10 receives the position registration acceptance signal via the antenna ANT and sends it to the CPU 11 via the signal processing unit 18 and the bus 19. The registration is completed and the process returns to step S30.
[0031]
In this state, when the switching center (MSC) 23 detects an incoming call to the mobile phone 10 (for example, 10a), the switching center (MSC) 23 passes through the base station 21 (for example, 21a) to the mobile phone 10 (for example, 21a). A paging (calling) signal is transmitted to 10a). As a result, when the receiving unit 16 of the mobile phone 10 receives this call signal via the antenna ANT and sends it to the CPU 11 via the signal processing unit 18 and the bus 19, the CPU 11 receives the call signal and receives step S38. It determines with "Yes" and progresses to step S40. If the switching center (MSC) 23 does not detect an incoming call to the mobile phone 10 (for example, 10a), the receiving unit 16 of the mobile phone 10 does not receive the calling signal. Returning to, the incoming call waiting state (standby state) is entered.
[0032]
Next, in step S40, it is determined whether or not the radio wave transmission restriction mode is set. Here, if the user has previously set the radio wave transmission restriction mode, “Yes” is determined in this step S40, and the process proceeds to step S42. In step S42, since the radio wave transmission restriction mode is set, the CPU 11 sends a control signal to the transmission unit 16 via the bus 19 and the signal processing unit 18, and a signal for a call response (incoming radio state). Report signal) is not sent. As a result, the switching center (MSC) 23 cannot receive the incoming radio state report signal via the base station 21 (for example, 21a), and thus the connection state is not established. In this case, as will be described later, the switching center (MSC) 23 stores the incoming call information in the incoming call history storage device 28 so that it can respond to an incoming call inquiry from the mobile phone 10 (for example, 10a) later. Yes.
[0033]
In step S42, the CPU 11 controls the signal processing unit 18 and the display unit 13 at the same time as not sending the incoming radio state report signal. Here, by controlling the signal processing unit 18, the vibrator 18 c is driven to notify the user of an incoming call, and the display unit 13 is controlled to display a message such as “There is an incoming call” on the display unit 13. Will be. Thereby, the user can recognize “there is an incoming call (incoming call)”, but in this case, since it is set to “radio wave transmission restriction mode”, an incoming operation is performed using the key input unit 14. The process returns to step S30 again, and the standby state is continued.
[0034]
On the other hand, if the user has not set the radio wave transmission restriction mode, “No” is determined in step S40, and the process proceeds to step S44, where the CPU 11 sends a control signal to the transmission unit 16 via the bus 19 and the signal processing unit 18. And an incoming radio state report signal for executing a normal incoming operation is sent out, and the process proceeds to step S46. As a result, a normal incoming call operation is executed. When the switching center (MSC) 23 receives the incoming radio status report signal via the base station 21 of the cell, the switching center (MSC) 23 An authentication request signal is transmitted, and based on this authentication request signal, the CPU 11 transmits an authentication response signal. Further, the switching center (MSC) 23 sends a level measurement request signal, and in response to this, the CPU 11 sends a level measurement response signal.
[0035]
The switching center (MSC) 23 sends a radio channel designation signal and a SETUP signal. In response to this, the CPU 11 sends an ALERT signal and a CONN signal. As a result, the switching center (MSC) 23 sends a CONNACK signal to establish a connection state between the mobile phone 10 (for example, 10a) and the base station 21 (for example, 21a), and the CPU 11 executes a call process. That is, the voice signal of the other party is received by the antenna ANT, and the voice signal of the other party is output from the speaker 18 b via the receiving unit 15 and the signal processing unit 18. On the other hand, the user's voice signal is input from the microphone 18 a and transmitted from the antenna ANT via the signal processing unit 18 and the transmission unit 16.
[0036]
When the user hooks off while the CPU 11 is executing the call process, the CPU 11 detects a hook-off signal from the key input unit 14, executes the call end process in step S48, and returns to step S30 again. Then, when the standby state is continued and the call signal is received again (there is an incoming call), the above-described operation is repeated.
[0037]
(2) Incoming call recording operation of switching center (MSC)
Here, if the user has previously set the radio wave transmission restriction mode, “Yes” is determined in step S40 described above, and a signal (incoming radio status report signal) for answering the call is transmitted in step S42. Will not. As a result, the switching center (MSC) 23 cannot receive the incoming radio state report signal via the base station 21 (for example, 21a), and thus the connection state is not established. The processing operation of the CPU (not shown) of the switching center (MSC) 23 in this case will be described based on the flowchart of FIG.
[0038]
First, when the switching center (MSC) 23 detects an incoming call to the mobile phone 10 (for example, 10a), the CPU (not shown) of the switching center (MSC) 23 starts a processing operation, and in step S50, the base station A paging (calling) signal is transmitted to the mobile phone 10 (for example, 10a) via 21 (for example, 21a). Here, if the mobile phone 10 is not set to the radio wave transmission restriction mode, the mobile phone 10 transmits an incoming radio state report signal. For this reason, the switching center (MSC) 23 receives the incoming radio state report signal via the base station 21 (for example, 21a). Therefore, “Yes” is determined in step S52, and normal incoming operation is performed in step S54. Then, the process returns to step S50 to enter the incoming call waiting state.
[0039]
On the other hand, when the mobile phone 10 is set to the radio wave transmission restriction mode, the mobile phone 10 operates so as not to transmit the incoming radio state report signal. For this reason, since the switching center (MSC) 23 cannot receive the incoming radio state report signal via the base station 21 (for example, 21a), it is determined as “No” in step S52, and this incoming call information is determined in step S56. Is stored in the incoming call history storage device 28. This makes it possible to respond to an incoming call inquiry from the mobile phone 10 (for example, 10a) later. Next, after the incoming call information is stored, the process returns to step S50 to enter the incoming call waiting state.
[0040]
(3) Reading incoming record history
Next, an operation for reading a history of incoming records in response to an inquiry about incoming calls from the mobile phone 10 (for example, 10a) will be described with reference to the sequence diagram of FIG. Here, when the mobile phone 10 (for example, 10a) dials a specific dial number (B number) in order to know whether or not there is an incoming call when the radio wave transmission restriction mode is set, the mobile phone 10 An outgoing radio status report message, a SETUP (call setting) message, and a dial number are transmitted to the switching center (MSC) 23 via the station 21 (for example, 21a).
[0041]
In response to this, the switching center (MSC) 23 sends a CALLPROC (call setting acceptance) message and an authentication request message to the mobile phone 10 via the base station 21 (for example, 21a). Then, the cellular phone 10 sends an authentication response message to the switching center (MSC) 23 via the base station 21 (for example, 21a) in response to the authentication request message. As a result, the switching center (MSC) 23 transmits a connection request message to the incoming call history storage device 28, and then transmits a level measurement request message to the mobile phone 10 via the base station 21 (for example, 21a). When the mobile phone 10 receives the level measurement request message, the mobile phone 10 transmits a level measurement response message.
[0042]
When the mobile phone 10 transmits the level measurement response message, the switching center (MSC) 23 sends a radio channel designation message and an ALERT (call) message to the mobile phone 10 via the base station 21 (for example, 21a). At this time, when the switching center (MSC) 23 receives the connection response message from the incoming call history storage device 28, the switching center (MSC) 23 sends a CONN (response) message to the mobile phone 10 via the base station 21 (for example, 21a). Send it out. Based on this CONN (response) message, the mobile phone 10 sends a CONNACK (response confirmation) message. As a result, the connection between the mobile phone 10 and the switching center (MSC) 23 is established, and the mobile phone 10 can retrieve the incoming call history stored in the incoming call history storage device 28 from the incoming call history storage device 28.
[0043]
【The invention's effect】
As described above, in the present invention, when the mobile communication terminal 10 is set to the radio wave transmission restriction mode, even if the mobile communication terminal 10 detects a call, it does not return an incoming response signal. It is possible to prevent the malfunction of the computer in the hospital or the computer in the cockpit. In this case, the call is notified to the user of the terminal 10 by the display unit 13 or the vibration device (vibrator) 18c of the terminal 10. For this reason, for example, the user of the terminal 10 in the hospital can contact the called party on a public telephone, etc., or by exiting the hospital and canceling the radio wave transmission restriction mode of the terminal 10 Thus, it becomes possible to contact the called party directly by the mobile communication terminal 10.
[0044]
It also uses various functions such as game functions, music functions, photo functions, and functions other than communication functions such as reading incoming e-mails, registering phone numbers, and checking schedules. However, since radio waves are not radiated, the convenience of this type of portable communication terminal 10 is remarkably improved. Further, when there is no return of an incoming response signal from the mobile communication terminal 10, the fact that there has been an incoming request is stored in the storage device 28 of the exchange node (switching center) 23 as incoming call history information. The mobile communication terminal 10 can access the history information. For this reason, in the normal mode that is not the radio wave transmission restriction mode, the mobile communication terminal 10 can access the storage device 28 of the exchange node (exchange station) 23 and retrieve the incoming call history information from the storage device 28.
[0045]
In the above-described embodiment, the example in which the storage device 28 for storing the incoming call history information is provided in the switching node (switching station) 23 has been described, but such a storage device 28 is provided in the switching node (switching station) 23. Instead of providing, it may be provided in the base station (node device that can access the exchange node) 21.
In the above-described embodiment, an example of a mobile communication system using only a mobile phone as a mobile communication terminal has been described. However, the mobile communication terminal is not limited to a mobile phone, and a personal handy-phone system (PHS). It is obvious that the present invention can also be applied to a mobile communication system having a plurality of types of portable communication terminals such as PDAs (personal digital assistants).
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a schematic configuration of a mobile communication system of the present invention.
2 is a block diagram illustrating a configuration example of the mobile communication terminal in FIG. 1. FIG.
FIG. 3 is a flowchart showing a location registration operation of the mobile communication terminal.
FIG. 4 is a flowchart showing a calling operation of the mobile communication terminal.
FIG. 5 is a flowchart showing a processing operation for storing an incoming history of a switching node (switching center).
FIG. 6 is a sequence diagram showing an operation of reading a history of incoming records in response to an inquiry about incoming calls from a mobile communication terminal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Mobile phone, 11 ... CPU, 12 ... ROM / RAM, 13 ... Display part, 14 ... Key input part, 15 ... Reception part, 16 ... Reception part, 17 ... Synthesizer, 18 ... Signal processing part, 18a ... Microphone, 18b ... Speaker, 18c ... Vibrator, 19 ... Internal bus, 21 ... Base station (BS), 22 ... Mobile telephone network, 23 ... Switching office (MSC), 24 ... HLR, 25 ... Service center, 26 ... Mail server, 27 ... answering machine 28 ... incoming call history storage device 29 ... billing information management server

Claims (1)

A mobile communication system having a portable communication terminal equipped with a radio wave transmission restriction mode that can be used for functions other than the radio wave transmission function to stop the automatic radio wave transmission function,
When the user sets the mobile communication terminal to the radio wave transmission restriction mode, the mobile communication terminal is used for location registration even when it detects that a location registration operation is required in association with a location registration area change. Location registration request signal non-transmission means for preventing radio wave transmission, and even when a call is detected, the incoming call response signal is not transmitted to the switching node or a node device accessible to the switching node. Call response non-sending means for notifying the call on the display unit of the terminal or the vibration device,
The switching node or the node device that can access the switching node stores the incoming call history information in the storage device as the incoming call history information when there is no return of the incoming call response signal from the mobile communication terminal. A storage means,
A mobile communication system , wherein the incoming call history information storage means can be accessed from the mobile communication terminal in a normal mode that is not a radio wave transmission restriction mode.

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