JPH0779194A - Portable telephone set - Google Patents

Abstract

PURPOSE:To provide a portable telephone set in which a clock time built therein is set automatically to the standard time of an area where the portable telephone set is. CONSTITUTION:The portable telephone set incorporating a clock 24 indicating a time is provided with a storage means 22 storing a time difference table by area codes and a control means 26 reading a time difference corresponding to the area code from the storage means 22 based on the received area code and setting the time of the clock 24 based on the time difference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone having a built-in timepiece.

[0002]

2. Description of the Related Art Some conventional portable telephones (including automobile telephones) have a built-in timepiece.

[0003]

[Problems to be Solved by the Invention] When traveling by car or the like in a wide area such as the United States and Europe,
Although the standard time often changes, it is very complicated to adjust the time of the clock built in the mobile phone each time to the standard time of the area.

In view of the above point, the present invention proposes a mobile phone capable of automatically setting the time of a clock incorporated in the mobile phone at the standard time of the area where the mobile phone exists. Is.

Further, according to the present invention, in a mobile phone capable of making a call in a permitted network stored in a subscriber card, the time of a clock built in the mobile phone is set,
It is intended to propose one that can be automatically set at the standard time of the residence area of the user to which the subscriber card is attached.

Further, according to the present invention, in a mobile phone capable of making a call in a permitted network stored in a subscriber card, the time of a clock built in the mobile phone is set to the standard time of the area where the mobile phone exists. It is intended to propose one that can be automatically set, or one that can be automatically set at the standard time of the residence area of the user to which the subscriber card is attached.

[0007]

According to a first aspect of the present invention, in a mobile telephone having a clock 24 for indicating time, a storage means 22 for storing a time difference table for each area code and a transmission / reception from a base station are received. The mobile phone is characterized by further comprising: a control means 26 for reading out the time difference corresponding to the area code from the storage means 22 based on the area code, and setting the time of the clock 24 based on the time difference.

A second aspect of the present invention is a portable telephone having a built-in clock for indicating time 24 and capable of making a call in a permitted network stored in a subscriber card 31, and storing means for storing a time difference table for each area code. 22 and a control means for reading the time difference corresponding to the area code from the storage means 22 based on the user's residence area code stored in the subscriber card 31 and setting the time of the clock 24 based on the time difference. 26 is a mobile phone.

The third aspect of the present invention corresponds to the area code from the storage means 22 based on the area code transmitted and received from the base station by the control means 26 in the mobile phone of the second aspect of the present invention. The mobile phone is characterized in that the time difference is read out and the time of the clock 24 can be set based on the time difference.

[0010]

According to the first aspect of the present invention, the control means 26 reads out the time difference corresponding to the area code from the storage means 22 based on the area code transmitted and received from the base station, and based on the time difference. The time of the clock 24 is set.

According to the second aspect of the present invention, the control means 26 reads out the time difference corresponding to the area code from the storage means 22 based on the area code of the user's residence stored in the subscriber card 31, The time of the clock 24 is set based on the time difference.

According to the third aspect of the present invention, the control means 26 reads the time difference corresponding to the area code from the storage means 22 based on the area code of the user's residence stored in the subscriber card 31, The time of the clock 24 is set based on the time difference, the time difference corresponding to the area code is read from the storage means 22 based on the area code transmitted and received from the base station, and the clock 24 is calculated based on the time difference. Set the time of day.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, a general cellular telephone system will be described with reference to FIG. The user uses the mobile terminal (mobile phone) a, the in-vehicle terminal (car phone) b, etc.
The outgoing call and the incoming call are connected to the base stations (base telephone stations) c and d via the wireless links g and f, respectively. A subscriber card (IC card with built-in CPU) h is attached to the mobile terminal a. Further, the base stations c and d are connected to each other via the base station link e, and are connected to the terminals a and b, or to the base station with which the other party is talking in response to a request from the terminals a and b. Connect and set up a call between terminals. At this time, the base stations c and d
May be in the same country (or state) or may be in different countries (or states). In some cases, different networks are constructed by different operators (business operators) in the same area. Different operators use different codes based on the CCITT standard (International Telegraph and Telephone Consultative Committee standard) and a country code (country, state, etc.) code.

On the other hand, the user joins an arbitrary operator to register. As a user certification method, a subscriber card, that is, a subscriber identification module (SIM: Subscrib
erIdentity Module) (IC card with built-in CPU), and a system using the SIM 107 will be described as an example. The SIM 107 includes a network that can be used by the user at the time of contract, a country code of a registered operator, a network code, and a PIN (Personal Ide).
ntity Number) is stored. This S
The IM 107 is originally prepared for the purpose of using the country code and the network code provided by the base station to determine whether or not the network is permitted to be used by the user and to determine whether or not the connection is possible. It is a thing.

Next, with reference to FIG. 1, a circuit configuration of the mobile phone will be described. First, the receiving system will be described. The reception signal from the antenna 1 is supplied to the bandpass filter 2 through the transmission / reception selector 12 to extract the reception signal within the reception band, and the extracted reception signal is the high frequency amplifier 3
After the gain is adjusted by the
It is mixed with the local oscillation signal from L11 and frequency-converted into a reception signal in the baseband. The PLL 11 includes a crystal resonance element 13, and under the control of the CPU 26, a local oscillation signal for obtaining a reception signal of a target channel is generated, and this is supplied to the mixer 4. The baseband received signal from the mixer 4 is supplied to the A / D converter 5 and converted into a digital signal having a predetermined sampling frequency.

The digital received signal from the A / D converter 5 is supplied to the demodulator 6 and demodulated. The signal from this demodulator 6 is a signal in which data and voice signals are multiplexed. The multiplexed signal is supplied to the audio decoder 7 to be decoded, and the obtained audio signal is amplified by the low frequency amplifier 8 and supplied to the speaker 9 to be uttered to the user. Further, this multiplexed signal is supplied to the decoder 10 and decoded to obtain data for the user such as control data and short message data, and this data is supplied to the CPU 26 through the bus 7 for processing and processed. The data is displayed on the display unit 29 through the I / O 25 according to the user's request.

Next, the transmission system will be described. The voice from the user is picked up by the microphone 28, and the voice 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, the control data from the keyboard 30 and the subscriber card, that is, the subscriber identification module (IC card with CPU) 31 supplied through the I / O 25, the user data such as the short message,
It is processed by the data encoder 21. Encoder 19,
The encoded audio signal and control data from the reference numeral 21, data for the user such as a short message, are supplied to the modulator 18 and modulated, and the modulated signal is supplied to the D / A converter 17 and the baseband. Converted to analog signal.

The modulated signal from the D / A converter 17 is supplied to a bandpass filter 16 for reducing unnecessary radiation for optimization, and then supplied to a mixer 15 to be locally supplied from the PLL 11. It is mixed with the oscillation signal and converted into a high frequency signal. The transmission signal from the mixer 15 is the amplifier 1
After being supplied to the antenna 4 and amplified, it is supplied to the antenna 1 through the transmission / reception selector 12 and transmitted.

Next, control for transmission and reception of the mobile phone 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
A part of 3 is backed up by a power source such as a battery so that data such as user setting values can be saved without being damaged. A real time clock (RTC) (also called a calendar timer, which is an electronic timepiece 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 the manufacturer.

When the user initiates a call using such a mobile phone, the subscriber 25 uses the subscriber card (SI
M) The data stored in 31 is read and I / O2
5 to the CPU 26, and at the same time, the personal identification number data input by the keyboard (KB) 30 is input to the I / O2.
5 is supplied to the CPU 26, the personal identification number is collated with the personal identification number stored in the subscriber identification module (IC card with built-in CPU) 25, and when the user is proved to be a valid user, the result thereof is obtained. Is displayed on the display 28. After that, the data sent from the base station is decoded by the data decoder 10 to obtain the base station country code and the network code, which is obtained by the CPU 26 from the authorized network stored in the subscriber card 31 at the time of contract. Matches the list of
The result is displayed on the display unit 29 via the I / O 25. When the CPU 26 determines that the call can be set, the user inputs the telephone number of the other party by the keyboard 30, and the data of this telephone number is supplied to the CPU 26 via the I / O 25 and processed to be processed by the data encoder. It is written in 21 and transmitted to the base station. The call is set in this way.

Next, the processing procedure of this portable telephone will be described with reference to the flow charts of FIGS. At step ST-1, the power is turned on. In step ST-2, it is determined whether or not the subscriber card (SIM) 31 is set, that is, whether or not the stored content of the subscriber card (SIM) 31 is read and input to the CPU 26. , N
If it is O, a warning is displayed by the display 29 in step ST-20, and the subscriber card 31 is set, that is, the stored content of the subscriber card 31 is prompted 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, and if NO, the process returns to step ST-2.

If YES in step ST-2, in step ST-3, the personal identification number (PIN) entered from the keyboard 30 matches the personal identification number stored in the subscriber card (SIM) 31. Judge whether or not, NO
If so, a warning is displayed on the display unit 29 in step ST-20 to prompt the user to enter a personal identification number, and then in step ST-21, it is determined whether or not the power is off. If YES, step ST-19 Ends, and if NO, returns to step ST-2. In this case, for example, when an incorrect personal identification number is input three times in succession by the keyboard 30, the subscriber card 31 itself can block the subsequent access to avoid theft, and Although this block can be released by another function and by using a different personal identification number, its illustration (illustrated by a flowchart) and description will be omitted here.

If YES in step ST-3, the country code is received in step ST-4, and then the network code is received in step ST-5. This makes it possible to confirm the location where the base station is installed.

This identification code is transmitted from the base station to the terminal, that is,
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 a specific area in a country or a country having a wide land area, and here is 2-byte data. The next NC 402 is a network code, which is a code given to each operator (business operator), and is 2-byte data here. ID40
Reference numeral 3 indicates a subscriber number code for a user and an identification number code for each base station in the case of a base station, which is 4-byte data in this case. Identification code 4 by these codes
04 is configured.

Returning to the flowchart, in order to determine whether the network of the area where the user is present is permitted to the subscriber, the SIM is determined in step ST-6.
(Subscriber card 31) Refer to the permitted network.
FIG. 5 shows an example of the permitted network list. In this example, in the built-in ROM of the subscriber card 31 of SIM107,
For example, it indicates that two networks NC1 and NC2 exist in the same country CC1 at addresses 100Hex and 104Hex and are permitted to be used. or,
The address 108Hex indicates that another network NC3 is permitted by another country CC2.
The address 10CHex indicates that another network NC4 is permitted by another country CC3.

In step ST-7, the received country code and network code are collated with the SIM permitted network list in FIG. 5 to determine whether they match, and if NO, step ST-20 In step ST-21, a warning is displayed on the display unit 29 that there is no available network in the area where the user is present. In step ST-21, it is determined whether or not the power is off.
Return to, and if YES, the end.

If YES in step ST-7, it is determined in step ST-8 whether or not the automatic time adjustment mode is set. If NO in step ST-13, it is determined whether or not there is an incoming call. , YES, an incoming call process is performed in step ST-14, and then a call is made in step ST-17.
If NO in step ST-13, step ST-15
It is determined whether or not there is a call in step ST-17, that is, if the user has performed a telephone number input operation using the keyboard 30, a call processing is performed in step ST-16, and then step ST-17. Make a call. If the incoming call and the outgoing call have ended, or if there is no incoming call or outgoing call, it is determined in step ST-18 whether the power is off or not, and YES.
If so, the process ends in step ST-19, and if NO, the process returns to step ST-13.

If the result of determination in step ST-8 as to whether or not the automatic time difference adjustment mode is set is YES, step ST-
In step 9, it is determined whether the local time mode is set, that is, whether the local time is set somewhere else or the time is set in the area where the user lives. If YES in step ST-9, that is, if the local time of the visited area is set, step ST-9
-11 country code from the base station, eg CC
Depending on one of 1, CC2, CC3, CC4,
A table of the time difference from the Greenwich Mean Time (GMT) corresponding to the country codes CC1, CC2, CC3, CC4 stored in the ROM 22 in advance, for example, the set time of the real time clock (RTC) 24 of the terminal (however, , H represents 1 hour) to select the offset time, ie the time difference. The time difference table stored in the ROM 22 is composed of a 2-byte country code and 1-byte signed time difference data.

If NO in step ST-9, that is,
If it is the time setting of the user's residence area, the country code 401 in the identification code for the user of FIG. 4 stored in the ROM of the user card (SIM) 31 is used,
An offset time, that is, a time difference, from the time difference table of FIG. 6 to the time of the area where the user lives is set.

The offset time, that is, the time difference in the local time setting of the visited area or the time setting of the user's residence area is stored in a specific area of the RAM 23. Next, in step ST-12, based on this offset time, the output data of the real time clock (RTC) 24, that is,
Make software adjustments to the time. This adjusted time is used as a reference time for time display, time stamp automatic call, and the like. After that, the process proceeds to step ST-13 and subsequent steps, 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 set to the time of the area visited by the user who has a mobile phone (car phone). Needless to say, in this mode, when the user is in the living area, the standard time of the living area is automatically set. On the other hand, when not in the local time mode, the time display of the living area depends on the SIM 107.

The mobile phone of this embodiment has 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 having the mobile phone (car phone). When you set a scheduled time and make an automatic call with a mobile phone,
When performing time stamps such as short messages,
Can be set automatically in local time. By entering the country code of the subscriber card in which the country code is stored into the mobile phone, the time in the area where the user lives can be set. Since the time is set by the CPU using the data used in the normal calling and receiving programs, the hardware dedicated to the time setting is unnecessary. Since a simple program for automatic time setting need only be inserted into a program for making and receiving calls of a mobile phone to which a conventional subscriber card system is applied, modification is easy. Even if the user does not own the terminal, that is, the mobile phone (car phone) itself, if the subscriber card is owned, the standard time can be automatically set in the mobile phone with this automatic time adjustment function. Is.

[0033]

According to the first aspect of the present invention described above, it is possible to obtain a mobile phone capable of automatically setting the time of a clock built in the mobile phone at the standard time of the area where the mobile phone exists. I can do it.

According to the second aspect of the present invention described above, in a mobile phone that can make a call in the permitted network stored in the subscriber card, the time of the clock built in the mobile phone is set by the subscriber card. It is possible to obtain what can be automatically set at the standard time of the assigned user's residence area.

According to the above-mentioned third aspect of the present invention, in a mobile telephone which is capable of making a call in the permitted network stored in the subscriber card, the time of the clock built in the mobile telephone indicates the existence of the mobile telephone. It is possible to automatically set the standard time of the area in which the subscriber card is used, or to obtain the standard time of the area where the user who has the subscriber card is present.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of an embodiment of the present invention.

FIG. 2 is a flowchart (part 1) showing the operation of the embodiment.

FIG. 3 is a flowchart showing the operation of the embodiment (No. 2).

FIG. 4 is an explanatory diagram showing a structural example of an identification code.

FIG. 5 is a table diagram showing a SIM-permitted network.

FIG. 6 is a table diagram 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 (3)

[Claims] 1. In a mobile phone having a built-in clock for indicating time, a storage means for storing a time difference table for each area code, and the area from the storage means based on the area code transmitted and received from the base station. A mobile phone, comprising: a control unit that reads out a time difference corresponding to a code and sets the time of the timepiece based on the time difference. 2. In a mobile phone having a built-in time clock and capable of making a call in a permitted network stored in a subscriber card, storage means for storing a time difference table for each area code, and the subscriber card. And a control means for reading out the time difference corresponding to the area code from the storage means based on the stored area code of the user's residence and setting the time of the clock based on the time difference. Mobile phone. 3. The control means reads out the time difference corresponding to the area code from the storage means based on the area code transmitted and received from the base station, and sets the time of the clock based on the time difference. The mobile phone according to claim 2, wherein the mobile phone is capable of being operated.