JP3371160B2 - Mobile phone - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone having a built-in timepiece. 2. Description of the Related Art Some conventional portable telephones (including automobile telephones) have a built-in clock for indicating time. [0003] When traveling by car or the like in a wide area such as the United States and Europe,
The standard time often changes, but it is very complicated to adjust the time of the clock built in the mobile phone each time to the local standard time. [0004] The object of the present invention is to set the mode
The clock time is the local standard time or the area where the user lives.
Mobile phones that can be automatically updated to standard time
To provide. The time difference table for each area code is stored in the storage means.
Is stored in advance and the area code
Is set to automatic time zone adjustment mode when
Is set to the automatic time difference adjustment mode.
Is set to the local time mode.
Is determined. As a result of the judgment,
When set to the interim mode,
Reads the time difference corresponding to the received area code
The time on the clock is based on the time difference
Is automatically updated. If
If the earth mode is not set,
Is a user who has been read from an IC card in advance
Read the time difference corresponding to the area code, and
The time of the above clock is automatically set to the standard time of the area where the user lives.
It is set so that it is automatically updated. [0010] Depending on the mode setting, the time of the clock
Or the standard time of your area
It is set so that it is automatically updated. That is, automatic
Set to time zone adjustment mode and set to local time mode
If so, it corresponds to the received region code
Based on the time difference, the time on the clock automatically changes to the local standard time.
While it is set to update, it is set to the automatic time difference adjustment mode,
If the local mode is not set, the IC card
From the user-resident area code read in advance from
Based on the corresponding time difference, the time on the clock is
It is set to be automatically updated at the quasi-time. Embodiments of the present invention will be described below in detail with reference to the drawings. First, a general cellular telephone system will be described with reference to FIG. The user uses a mobile terminal (mobile phone) a or an in-vehicle terminal (automobile phone) b,
Outgoing and incoming calls are connected to base stations (base telephone stations) c and d via wireless links g and f, respectively. A subscriber card (IC card with a built-in CPU) h is attached to the portable terminal a. Further, the base stations c and d are connected to each other via a base station link e, and are connected to the terminals a and b, or in response to a request from the terminals a and b, to the base station where the communication partner is located. Connect and set up a call between devices. At this time, base stations c and d
May be in the same country (or state), for example, or in different countries (or states). Such networks may be constructed separately by different operators (operators) within the same area. Different networks of operators are identified by codes based on CCITT standards (International Telegraph and Telephone Consultative Committee standards) and with country codes (codes for countries, states, etc.) added thereto. On the other hand, a user subscribes to an arbitrary operator to perform registration. Subscriber card (C
An example of a system using a Subscriber Identity Module (SIM) as the PU built-in IC card) h will be described. CPU of this subscriber card h
Has a network that can be used by the user at the time of contract, the country code, network code, and PIN (Personal Identity Number) of the registered operator.
(PIN) is stored. This subscriber card h
Is originally provided for the purpose of judging whether or not the network is permitted to be used by the user by using the country code and network code provided by the base station, and determining whether or not connection is possible. It is. Next, the circuit configuration of the portable telephone will be described with reference to FIG. First, the receiving system will be described. The reception signal from the antenna 1 is supplied to the band-pass filter 2 through the transmission / reception selector 12 to extract the reception signal within the reception band.
After the gain has been adjusted by the
The signal is mixed with the local oscillation signal from L11 and frequency-converted into a received signal in the baseband. The PLL 11 includes the crystal resonance element 13, and generates a local oscillation signal that can obtain a reception signal of a target channel under the control of the CPU 26, and supplies the local oscillation signal to the mixer 4. The baseband received signal from the mixer 4 is supplied to an A / D converter 5 and converted into a digital signal having a predetermined sampling frequency. The digital reception signal from the A / D converter 5 is supplied to a demodulator 6 and demodulated. The signal from the demodulator 6 is a signal in which the data and the audio signal are multiplexed. The multiplexed signal is supplied to an audio decoder 7 and decoded, and the obtained audio signal is amplified by a low-frequency amplifier 8 and supplied to a speaker 9 to be output to a user. The multiplexed signal is supplied to the decoder 10 and decoded to obtain data for the user such as control data and short message data. The data is supplied to the CPU 26 via the bus 7 for processing, and the data is supplied to the user. The data is displayed on the display 29 via the I / O 25 in response to a user request. Next, the transmission system will be described. The sound from the user is collected by the microphone 28, and the sound signal is supplied to the amplifier 20 and amplified, and then supplied to the encoder 19 to be converted into a digital signal. On the other hand, C
Under the control of the PU 26, control data supplied from the keyboard 30 and the subscriber card (IC card with a built-in CPU) {subscriber identification module (SIM)} 31 supplied through the I / O 25, and data to the user such as a short message are: Are processed by the data encoder 21. The data for the user such as the encoded audio signal and the control data and the short message from the encoders 19 and 21 are supplied to the modulator 18 and modulated, and the modulated signal is supplied to the D / A converter 17. To a baseband analog signal. The modulated signal from the D / A converter 17 is supplied to a band-pass filter 16 for reducing unnecessary radiation and is optimized, and then supplied to a mixer 15 for localization from a PLL 11. It is mixed with an oscillating signal and converted to a high frequency signal. The transmission signal from the mixer 15 is the amplifier 1
After being supplied to the antenna 4 and amplified, the signal is supplied to the antenna 1 through the transmission / reception selector 12 and transmitted. Next, control of transmission and reception of the portable telephone will be described. A program that causes the CPU 26 to operate for transmission and reception control is stored in the ROM 22 in advance. Temporary data such as data processed by the CPU 26 is stored in the RAM 23. RAM2
Part 3 is backed up by a power source such as a battery, and data such as user setting values is stored without being damaged. A real-time clock (RTC) (also referred to as a calendar timer, an electronic clock having a function of indicating the current time) 24 is set to an appropriate standard time at the time of shipment of a mobile phone by a manufacturer. When a user initiates a call using such a mobile phone, the I / O 25 uses a subscriber card (SI
M) The data stored in 31 is read and I / O2
5 to the CPU 26, and the personal identification number data inputted by the keyboard (KB) 30 to the I / O2
The password is supplied to the CPU 26 through the password 5, and the password is compared with the password stored in the subscriber card (SIM) 31. If the password is proved to be a valid user, the result is displayed on the display 9 Will be displayed. Thereafter, the data transmitted from the base station is decoded by the data decoder 10 to obtain a base station country code and a network code, which are stored in the subscriber card (SIM) 31 by the CPU 26 at the time of contract. And the result is compared with the list of I /
It is displayed on the display 29 via O25. And C
If it is determined by the PU 26 that the call can be set, the user inputs the other party's telephone number by using the keyboard 30, and the data of this telephone number is transmitted to the CPU 26 via the I / O 25.
And written to the data encoder 21,
Sent to the base station. In this way, a call is set. Next, the processing procedure of the portable telephone will be described with reference to the flowcharts of FIGS. In step ST-1, the power is turned on. In step ST-2, it is determined whether or not the subscriber card (SIM) 31 has been set, that is, whether or not the stored content of the subscriber card (SIM) 31 has been read and input to the CPU 26. , N
If O, a warning is displayed on the display 29 in step ST-20 to prompt the user to set the subscriber card 31, that is, to input the stored contents of the subscriber card 31 to the CPU 26,
Next, in step ST-21, it is determined whether or not the power is off. If YES, the process ends in step ST-19. If NO, the process returns to step ST-2. If "YES" in the step ST-2, the personal identification number (PIN) input from the keyboard 30 matches the personal identification number stored in the subscriber card (SIM) 31 in a step ST-3. Judge whether or not there is no
If so, a warning is displayed on the display 29 at step ST-20 to prompt the input of a password, and then it is determined at step ST-21 whether or not the power is off. If YES, step ST-19 is performed. , And if NO, the process returns to step ST-2. In this case, for example, if an incorrect password is entered three times consecutively by the keyboard 30, the subscriber card 31 itself can block subsequent access to avoid plagiarism, and The release of this block can be released by another function using another password, but its illustration (illustration by a flowchart) and its explanation are omitted here. If YES in step ST-3, a country code is received in step ST-4, and then a network code is received in step ST-5. Thereby, the location where the base station is installed can be confirmed. This identification code is transmitted from the base station to the terminal, ie,
It is broadcast to a mobile phone through a specific data channel, and confirmation is generally performed as a process before a call. Here, an example of the structure of the identification code will be described with reference to FIG. CC 401 indicates a country code, which is a code for each specific area in a country or a country having a large land area, and is 2-byte data here. The next NC 402 is a network code, which is a code assigned to each operator (operator), and is 2-byte data here. ID40
Numeral 3 indicates a subscriber number code for a user and an identification number code for each base station for a base station, which is 4-byte data here. With these codes, the identification code 4
04 is configured. Returning to the flowchart, in step ST-6, the SIM in the area where the user is located is determined in order to determine whether the subscriber has been authorized.
(Subscriber card 31) Refers to the permission network.
FIG. 5 shows an example of the permitted network list. This example shows that two networks NC1 and NC2 exist in the same country CC1 at addresses 100Hex and 104Hex in the internal ROM of the subscriber card 31, and use thereof is permitted. Also, the address 108
Hex is in another country CC2 and another network NC
3 indicates that it is permitted. Address 10C
Hex indicates that another network NC4 is permitted in yet another country CC3. In step ST-7, the received country code and network code are checked against the permitted network list in the SIM shown in FIG. 5 to determine whether or not they match. Displays a warning on the display 29 that no network can be used in the area where the user is located, and in step ST-21, it is determined whether the power is off or not.
And if YES, the process ends. If YES in step ST-7, it is determined whether or not an automatic time adjustment mode is set in step ST-8, and if NO, it is determined whether or not there is an incoming call in step ST-13. If YES, the call reception process is performed in step ST-14, and then the call is performed in step ST-17.
If NO in step ST-13, step ST-15
It is determined whether or not there is a call, and if YES, that is, if the user has performed a telephone number input operation using the keyboard 30, a call process is performed in step ST-16 and then step ST-17. Make a call with. If the incoming and outgoing calls have ended, or if there is no incoming or outgoing call, it is determined in step ST-18 whether or not the power is off, and YES
If so, the process ends at step ST-19, and if NO, the process returns to step ST-13. If it is determined in step ST-8 whether or not the mode is the automatic time difference adjustment mode, and if the result of step ST-8 is YES, step ST-
In step 9, it is determined whether the mode is the local time mode, that is, whether the local time is set in some other visited area or the time is set in the user's residence area. If YES in step ST-9, that is, if the local time is set in the visited area, step ST
At −11, a country code from the base station, for example, CC
1, CC2, CC3, depending on any of CC4,
The set time of the real-time clock (RTC) 24 of the terminal is stored in advance in the ROM 22, for example, as a time difference table with respect to Greenwich Mean Time (GMT) corresponding to the country codes CC1, CC2, CC3, and CC4 as shown in FIG. , H denote one hour) to select the offset time, ie, the time difference. The time difference table stored in the ROM 22 includes a 2-byte country code and 1-byte signed time difference data. If NO in step ST-9, that is,
If the time is set in the residence area of the user, the country code 401 in the user identification code of FIG. 4 stored in the ROM of the user card (SIM) 31 is used.
The offset time to the time of the area where the user resides, that is, the time difference is set from the time difference table of FIG. The offset time in setting the local time of the visited area or the time setting of the user's residence area, that is, the time difference, is stored in a specific area of the RAM 23. Next, in step ST-12, based on the offset time, output data of the real-time clock (RTC) 24, that is,
Perform software adjustment of time. The adjusted time is used as a reference time for time display, time stamp automatic call, and the like. Thereafter, the process proceeds to steps after step ST-13, but since these steps have already been described, the description thereof will be omitted. As described above, the real-time clock (R
In the local time mode, the time of (TC) 24 is the time setting of an area visited by a user having a mobile phone (car phone). Of course, in this mode, when the user is in the resident area, it is needless to say that the time is automatically set to the standard time of the resident area. On the other hand, when the mode is not the local time mode, the time display of the residence area depending on the subscriber card (SIM) 31 is performed. According to the portable telephone of this embodiment, there are the following advantages. The time of the clock built in the mobile phone is automatically set to the local time of the area visited by the user with the mobile phone (car phone). Depending on the mobile phone, set the scheduled time and automatically call,
When performing a time stamp such as a short message,
Automatically set to local time. By inputting the country code of the subscriber card in which the country code is stored into the mobile phone, it is possible to set the time of the residence area of the user. Since the time is set by the CPU using the data used in the normal calling and receiving programs, hardware dedicated to time setting is not required. Since it is only necessary to insert a simple program for automatic time setting into a program for calling and receiving a mobile phone to which the conventional subscriber card system is applied, the modification is easy. Even if the user does not own the terminal, that is, the mobile phone (car phone) itself, but has the subscriber card, the mobile phone having the automatic time adjustment function can automatically set the standard time. It is. As described above, as described above, whether the mode is set or not is determined.
Depending on the time of the clock, the local standard time or the user
Mobile phone that can be automatically updated to the standard time of your area
You get a talker. [0034]

[Brief description of the drawings] FIG. 1 is a block diagram showing a circuit configuration according to an embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the embodiment (part 1). FIG. 3 is a flowchart showing the operation of the embodiment (part 2); FIG. 4 is an explanatory diagram showing an example of the structure of an identification code. FIG. 5 is a table showing a SIM permission network. FIG. 6 is a table showing an example of a time difference table. FIG. 7 is an explanatory diagram showing a cellular telephone system. [Explanation of symbols] 22 ROM 23 RAM 24 Real Time Clock (RTC) 25 I / O 26 CPU 29 Display 30 keyboard 31 Subscriber Card

Claims (1)

(57) met [Claims 1. A mobile phone ing a built-in clock indicating time, a storage unit different time difference table region code that is pre-stored, regional from the base station Automatic time difference adjustment when code is received
Mode is set, and the automatic time difference
If set to local time mode,
A judgment is made as to whether or not the setting has been made.
If the local time mode is set,
From the storage means, the time difference corresponding to the received area code
And reads the time of the clock based on the time difference.
While updating automatically to the standard time, the above local mode
If not set to IC
User-resident area code read from the card in advance
The time difference corresponding to the time difference, and based on the time difference,
The total time is automatically updated to the standard time of the area where the user lives.
Mobile phone and Teisu Ru control means is formed by provided.