JPH1132111A - Telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To universally use this system in various regions by controlling an oscillating means so as to output a needed frequency signal in accordance with identification information of a used region and a communication provider and performing setting change of processing that is needed for sending and receiving processing. SOLUTION: Frequency information that is different in each operation region where a communication system that corresponds to a portable telephone 1 is usable is registered, e.g. as a region frequency table on an ROM 15. When the telephone 1 that is usually used in Japan is taken to any of three regions of the United States, Korea and Hong Kong to be used, a controlling part 11 sets the frequency division ratio of a frequency synthesizer 4 and an oscillator 9 so that, for instance, a frequency fL1 may be 978.4 to 1003.77 MHz and that a frequency fL3 may be 154.24 MHz. In the case of a display language change mode with initialization, the part 11 performs switch setting of a display language in accordance with a discriminated region. Thus, the setting change of processing that is needed for sending and receiving processing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone device which can be generally used in various regions / countries.

[0002]

2. Description of the Related Art In recent years, portable telephones capable of communicating by radio have become widespread. Since this mobile phone is small and lightweight, it is easy to carry around.
It is possible to store it in a bag or pocket when going out, etc., and if it is within the service area supported by the carrier contracted by the user, you can talk on the go. ing.

[0003] When a mobile phone is taken out of the country and used, it is used outside the service area of the telecommunications carrier with which the user has a direct contract. But by signing a roaming agreement to get access to telecommunications services,
The user can use the mobile phone through the telecommunications carrier in that country as if he were in the country.

[0004]

By the way, as a communication system of such a portable telephone, for example, GSM (Global System for Mobile communicati
on) system, and IS-95 (Interim Standard95) in the United States, Asia (for example, Korea, Hong Kong, etc.), etc.
Base CDMA (Code Division Multiple Access)
A scheme has been introduced.

[0005] For example, the United States, which has introduced the CDMA system,
Since the same method is used in each region in Asia,
Basically, the same mobile phone can be used. Therefore, by entering into the roaming contract, the user can bring his / her own mobile phone outside the home country and use it as it is. However, even if the same communication method is introduced, if the assigned frequency band or communication protocol is different, it is necessary to rent a mobile phone compatible with the country's frequency band when leaving the country, and eventually The inconvenience is that you cannot use your own mobile phone.

[0006] From the viewpoint of a manufacturer of a portable telephone, even if a device compatible with the same system is manufactured,
It is necessary to manufacture a plurality of types of models having specifications corresponding to frequency bands corresponding to destinations. further,
Regarding the display of various data (telephone numbers, names, and the like) registered in the mobile phone, it is necessary to manufacture a plurality of models having specifications capable of displaying a language corresponding to each language.

[0007] As described above, different frequencies are assigned by countries and regions, and even by telecommunications carriers.
Due to differences in communication protocols and languages used in different regions, it is difficult to manufacture universally usable mobile telephone devices between countries, and there is a problem that mobile telephone devices cannot be used effectively. Was.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a telephone device that can be used in various areas. For this purpose, the telephone device oscillates and outputs various frequency signals used for transmission / reception processing, and oscillates with variable oscillation output frequency and frequency information used for transmission / reception processing corresponding to the identification information of the region or the communication carrier. And a oscillating means for outputting a necessary frequency signal based on the frequency information of the storage means in accordance with the identification information of the use area or the communication carrier, and And control means for changing setting of processing required for transmission / reception processing according to the identification information of the user. In other words, even if the frequency is set differently for each region or communication carrier used, it can be used in each region by switching it, and the communication protocol can be changed if necessary.

[0009] Further, identification information of a region or a communication carrier to be used can be input by a user through input means.
As a result, the user makes an input according to the region to be used, so that the telephone device is set in a state according to the region and the like, and becomes usable. Furthermore, by providing a determination unit for determining the identification information of the area or the communication carrier where the telephone device is used from the received information, it is possible to automatically cope with each area without the user inputting the area or the like. Telephone equipment can be provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to an example in which the present invention is applied to, for example, a cellular type portable telephone. FIG. 1 is a block diagram showing a main part of the mobile phone according to the embodiment. In the mobile phone 1 shown in this figure, a radio wave received by an antenna A is configured by a reception power amplification unit 3a, a mixer 3b, an IF amplification unit 3c, a demodulation unit 3d, and the like via an antenna sharing unit 2. Is supplied to the receiving unit 3 (shown by a broken line).

The high-frequency signal amplified by the reception amplifier 3a is mixed with the local frequency fL1 from the frequency synthesizer 4 by the mixer 3b to be an intermediate frequency signal. The frequency synthesizer unit 4 is capable of selecting a frequency for transmission / reception in order to enable communication via an arbitrary channel allocated to the communication system configured by the mobile phone 1. It is configured. The frequency synthesizer unit 4 will be described later in detail. The intermediate frequency signal output from the mixer 3b is supplied to an IF (Intermediate frequency)
The gain is controlled by c and demodulated to a baseband signal by the demodulation unit 3d. At this time, demodulation processing is performed using the demodulation frequency fL2 from the oscillator 6. The demodulated baseband signal is supplied to a reception signal processing unit 5a constituting the baseband processing unit 5. The reception signal processing unit 5a performs necessary reception signal processing, and is supplied to the reception unit 7 to output audio.

On the other hand, as for the configuration and operation of the transmission system, for example, a user's voice input by the transmission section 8 is subjected to required signal processing by the transmission signal processing section 5b of the baseband signal processing section 5 and transmitted. The signal is supplied to the modulation section 10a of the section 10. Here, the quadrature modulation frequency f from the oscillator 9
The modulation process is performed by L3. And the mixer 10
b, the local frequency fL from the frequency synthesizer unit 4
1 and a high-frequency signal (radio frequency signal), which is amplified by the transmission power amplifier 10c. The amplified high-frequency signal is transmitted and output from the antenna A via the antenna duplexer 2.

The control unit 11 controls, for example, the frequency synthesizer 4 and the baseband processing unit 5 according to an operation signal supplied from the operation unit 12. The operation unit 12 is operated by a numeric key capable of inputting a destination telephone number or the like, a jog shuttle capable of selectively reading various data such as a telephone number registered in the RAM 13 in advance, or the like. It is configured. Operation unit 12
The information such as the telephone number input by the
Can be displayed on the display unit 14 by the control of. In addition, the display unit 14 can display an image in a local language in which the mobile phone 1 is used. The switching of the language in the display operation when the used area changes will be described later.

In the ROM 15, different frequency information is registered in, for example, an area frequency table for each operation area where the communication system corresponding to the mobile phone 1 is usable. When the user uses the mobile phone 1 in a certain area, the user selects a frequency band corresponding to the area by the operation unit 12 and drives the frequency synthesizer unit 4 and the like according to the frequency. The mobile phone 1 can be used. In addition,
The region selection signal read from the region frequency table is
The frequency switching control signal Cs is supplied to the frequency synthesizer 11 via the controller 11. The frequency that differs for each region will be described later. Further, the ROM 15 stores character information corresponding to various local languages in which the mobile phone 1 may be used.

The RAM 13 stores, for example, data input by a user using the operation unit 12 and instructing registration. For example, the telephone number and name of the other party with which the user frequently calls are registered in the RAM 13. By using the registered telephone number data, the control unit 11 can perform, for example, automatic dial operation control for calling according to a user's selection operation.

Next, the frequency synthesizer 4 will be described with reference to FIG. The radio frequency output fL1 of the frequency synthesizer unit 4 shown in FIG.
led Oscillator) 21. An output signal from an output terminal of the VCO 21 is supplied to a programmable frequency divider 23 via a prescaler 22. The frequency division ratio of the programmable frequency divider 23 is set based on the frequency switching control signal Cs supplied from the control unit 11 shown in FIG. The frequency-divided signal is supplied to one terminal of the phase comparator 26 as an output signal fr1.

The other terminal of the phase comparator 26 has T
CXO (Temperature Compensated Crystal Oscillato
r) An output signal fr2 output from 24 and divided by the reference frequency divider 25 is supplied. Here, the phases of the output signal fr1 and the output signal fr2 are compared, and a phase difference signal corresponding to the difference is output. This phase difference signal is supplied to the charge pump 27
Is converted into an analog output voltage level, and supplied to the control terminal of the VCO 21 via the loop filter 28. According to the output from the loop filter 28, the VCO
The oscillation frequency fL1 of 21 is set and controlled.

The frequency synthesizer unit 4 includes a control unit 1
Outputting a desired frequency as the frequency fL1 by setting the frequency division ratio of the programmable frequency divider 23 and / or the frequency division ratio of the reference frequency divider 25 according to the frequency switching control signal Cs supplied from 1 Can be. Therefore, the control unit 11 switches the frequency division ratio according to the frequency band set according to the region / telecommunication carrier to be used, so that the frequency fL1 is required for the use of the portable telephone in the region / telecommunication carrier. Frequency can be obtained.

The oscillator 6 and the oscillator 9 have substantially the same configuration as that of the frequency synthesizer unit 4, and the control unit 1
1 sets the frequency division ratio so that desired frequencies fL2 and fL
3 can be output. In the case of this example, at least the oscillator 9 is configured to be able to change the frequency fL3.

Next, frequency bands assigned to each region (country) will be described. Each region mentioned here is based on IS-95 (Interim Standard 95) based C
It is assumed that Japan, the United States, South Korea, and Hong Kong adopt the DMA (Code Division Multiple Access) system. FIG. 3 shows transmission frequency bands and reception frequency bands allocated to Japan, the United States, South Korea, and Hong Kong, respectively. FIG. 4 shows the output of the frequency synthesizer unit 4 in the cellular phone 1 used in each region. 3 shows a frequency fL1, a frequency fL2 for the demodulation unit 3d, and a frequency fL3 for the modulation unit 10a.

For example, in Japan, the transmission frequency band is 887-
925 MHz and the reception frequency band is 832 to 870 MHz. In this case, if the first IF in the receiving unit 3 is, for example, 109.8 MHz, the frequency fL1 is 72
2.2 to 760.2 MHz, frequency fL2 is 109.8
MHz and the frequency fL3 are 164.8 MHz.

In the United States, South Korea, and Hong Kong, the transmission frequency band is 824.04 to 848. as shown in FIG.
97 MHz, and the reception frequency band is 869.04-89.
3.97 MHz. In this case, if the first IF in the receiving unit 3 is, for example, 109.8 MHz, the frequency fL1 is 978.84 to 1003.77 MHz, the frequency fL2 is 109.8 MHz, and the frequency fL3 is 154.
2 MHz. As described above, in the three regions of the United States, South Korea, and Hong Kong, the same frequency band is allocated for both transmission and reception, and therefore, from the viewpoint of the frequency for modulation and demodulation, one mobile phone 1 Can be used in common.

However, the transmission /
Since the reception frequency bands are different from those of the three regions, when the user carries the mobile phone 1 and goes out of Japan to any of the three regions, for example, it is possible to perform transmission / reception in the frequency band assigned locally. You need to change the settings to be able to do so. Therefore, in this example, when the mobile phone 1 normally used in Japan is taken out and used in any of the three regions, for example, the frequency fL1 is set to 978.
4 to 1003.77 MHz, frequency fL3 is 154.2
The control unit 11 can set the frequency division ratio of the frequency synthesizer 4 and the oscillator 9 so that the frequency becomes MHz. Therefore, for example, even if the mobile phone 1 used in Japan is brought into a country or region where the allocated frequency band is different, it is possible to change the frequency band used by the mobile phone 1 itself. It is possible to use one mobile phone 1 in each area.

Conversely, when the portable telephone 1 used in any of the three regions is brought into Japan for use, the control unit 11 sets the frequency fL1 to 722.8 to 722.8. 760.2 MHz, transmission frequency fL3 is 1
The frequency division ratio may be set so as to be 64.8 MHz.

As the frequency fL1, fL1 = 7 for Japan
Examples of frequency division ratios for switching between 22.2 MHz and a case where fL1 = 978.84 MHz for the United States / Korea / Hong Kong as the frequency fL1 will be described. TCXO
Assuming that the oscillation frequency ftx10 of 24 is 19.8 MHz, the value of the reference frequency divider 25 is 158 for Japan.
4, and the output signal fr2 = 12.5 KHz. By setting the value of the programmable frequency divider 23 to 57776, the oscillation frequency fL1 becomes 722.2 MHz.
In the case of US / Korea / Hong Kong, the reference frequency divider 25
Is 660, and the output signal fr2 = 30 KHz. Then, the value of the programmable frequency divider 23 is set to 32628.
As a result, the oscillation frequency fL1 = 722.2 MHz.

By the way, as a method of selecting the transmission / reception frequency, for example, when an individual brings the device to another country or region and uses it, the user operates a jog dial or various operation keys provided on the operation unit 12. It should just be possible to set it. For example, when the operation mode state for changing the frequency is set, the selected country or region name (for example, “Nihon”, “America”, “Hong Kong”, etc.) is displayed on the display unit 14 in response to the operation of the jog dial, Assuming that the region selected at that time is designated by the user's selection decision operation, the frequency fL
1. Change the setting of fL3.

For this purpose, the ROM 15 may store information on transmission / reception frequencies and information on the country (region) to which each transmission / reception frequency is assigned, for example, as table data. The transmission / reception frequency is determined in accordance with the region name, and the frequency fL corresponding thereto is determined.
1. Control is performed so that fL3 is obtained. Of course, if necessary, the communication protocol and the display language are changed. Naturally, the user only has to select and set the area to be used without being conscious of the frequency in the area, and the operation of the user is not complicated.

[0028] Also, different transmission /
Because you can set the receiving frequency and ship it,
The mobile phone 1 can be shipped in a state corresponding to a shipping destination (destination). This means that the manufacturer does not need to manufacture a plurality of different models having specifications corresponding to each destination. That is, in the final adjustment stage before shipment after the manufacture of the mobile phone 1, the frequencies fL1 and fL3, the communication protocol in the control software of the control unit 11, and the display on the display 14 are used in accordance with the shipping destination. Language and the like may be set.

Further, in the case of the present embodiment, when the product is shipped from the manufacturer or when the user personally uses the device by taking it to a different region, the portable telephone 1 determines the region or the like and changes the setting automatically. You can also For example, S can be received at the destination or the place of use.
ID (System Identification: Cellular system identifier, area can be identified), NID (Network Identi
fication ... the sub-ID of the system defined by the owner of the SID)
Since the country or region where the mobile phone 1 is located can be determined, the communication protocol and the display unit 1 are determined based on the determination result.
4, the display language can be automatically changed. In addition,
Regarding the display language, for example, in the case of personal use, it is inconvenient if it is automatically changed on the go, so it is not automatically changed, and it may be possible to manually select it, or Automatically changes to
The mode in which the change is prohibited may be set by the user.

FIG. 5 shows a processing example of the control unit 11 of the portable telephone 1 of the present embodiment, and a usage form according to this will be described. It is to be noted that, as a premise of this processing example, the mobile phone 1 is set in a state where frequencies fL1, fL3, a communication protocol, and a display language according to a certain region and a business operator are set as initial settings at the time of shipment. At the time of purchase,
It is assumed that it is in a state where it can be used in the purchased area. At the time of initial setting, it is assumed that the language used for display on the display unit 14 is set to a mode (display language change mode) in which switching is automatically performed in response to a change in the region to be used.

As shown in the flowchart of FIG. 5, when the portable telephone 1 is turned on in step F100, the portable telephone 1 is first transmitted in step F101 from a base station of a communication carrier covering the country or region. Search for the pilot channel as the current signal. Here, if a pilot channel cannot be obtained despite performing a predetermined time search, the frequency band assigned in that country or region is set in the mobile phone 1 at that time. It is determined that it is different from the frequency band. That is, in this case, the power is turned on in an area different from the area to which the receiver is initially set and in an area having a different transmission / reception frequency band, and cannot be used as it is. Therefore, although not shown in the processing of FIG. 5, for example, the display unit 14 notifies the user to change the setting of the frequency band. In response to the notification, the user performs a frequency band setting change operation using, for example, the jog dial of the operation unit 12 as described above, and the control unit 11 changes the frequencies fL1 and fL3 according to the operation. In that case, the frequency fL
1. After the change of fL3 is completed, the search processing of the pilot channel in step F101 may be performed again.

Note that the frequency fL according to the region as described above
1. The change of fL3 is basically performed according to the change operation of the user. However, in order to further improve the operability, the control unit 11 automatically changes the frequencies fL1 and fL3. Is also good. For example, if the mobile phone 1 set for Japan is powered on in the United States (or South Korea or Hong Kong), the pilot channel search cannot be successfully completed in step F101. Here, without waiting for the user's operation, the control unit 11 determines that the mobile phone 1 is currently located in the United States, South Korea or Hong Kong, and sets the frequencies fL1 and fL3 to the frequencies for the United States / South Korea / Hong Kong. Is automatically changed to

As an example of the operation of this embodiment, it is assumed that Japan / US / Korea / Hong Kong is used. Therefore, there are two types of transmission / reception frequency allocation as can be seen from FIGS. 3 and 4. This automatic switching is possible even if it is assumed to be used in an area of a different frequency band. That is, the frequency may be automatically switched sequentially in accordance with the result of the pilot channel search. If the pilot channel is not obtained even if the frequency is switched to the assumed frequency in all areas, it can be determined that the area is out of the usable area.

When the power is turned on in a certain area,
If the settings of the frequencies fL1 and fL3 match the settings of the area (and if they are not out of the usable range), step F
A pilot channel can be obtained at 101,
If a pilot channel can be obtained, the short-period PN (Pseudo-N) transmitted from the base station in step F102
oise: Synchronization of the pseudo-noise code with the short-period PN code on the terminal side, and then receiving the synchronization channel in step F103, base station information (short-period PN code offset amount, etc.), channel configuration, etc. Obtain system broadcast information. The system broadcast information also includes the offset amount of the long period PN, and the
Can be synchronized. Further, in step F104, a paging channel is received, and SID, NID, information necessary for handover, and the like are obtained from the overhead message. Thereby, the mobile phone 1
Can determine with which base station it can communicate.

Mobile phone 1 is used for SI at Paging Chan
By obtaining D and NID, the control unit 11
3 or the ID memory table registered in the ROM 15 can be checked to determine which communication carrier has been connected. If the communication carrier can be determined, the use area (also stored as table data) can be confirmed. In step F105, the communication carrier and the area are thus determined.
It is needless to say that the terminal cannot be used when it is out of the service area or when the terminal cannot be used due to no roaming contract.

If the area can be determined in step F105,
In step F106, it is determined whether or not the display language set on the display unit 14 at that time matches the determined language of the current region. If they match, the process proceeds to step F109. If they do not match, for example, if the display is performed in Korean in the case of currently using in Hong Kong, the process proceeds to step F107. Check the display language mode. This mode check is to check whether or not the display language change mode is to switch the display language according to the region as described above.

For example, in the case of shipment from a manufacturer,
It is preferable that the display language be automatically switched to the language of the region according to the region of the shipping destination. Therefore, the display language change mode is set in the initial setting. When the display language change mode is set as described above, the process proceeds to step F108, and the control unit 11 performs switching setting of the display language according to the determined area. Then, the process proceeds to step F109.

On the other hand, if a certain user considers using the mobile phone 1 in various regions after purchasing it, it may be inconvenient to switch the display language according to the region. Therefore, the user operates the operation unit 12.
It is possible to switch from the display language change mode to the display language fixed mode by the mode operation from. Naturally, the mode state at each point is stored in the register (or the RAM 13) in the control unit 11. In the case of such a display language fixed mode, step F108
The process proceeds to Step F109 without performing the process of.

In Step F109, Step F105
It is determined whether or not an appropriate communication protocol is set as a format for decoding and encoding communication data in accordance with the business entity / region determined in step (1). If a different protocol is set, the control unit 11 sets an appropriate protocol according to the determined company / region in step F110. When the above processing is completed, the mobile phone 1 can be used in the area / communications carrier, and the mobile phone 1 is in a standby state in step F111.

The portable telephone 1 of the present embodiment, which performs the above-described processing, can be used for general purposes in various regions, and has advantages in terms of manufacturing on the manufacturer side and advantages in use on the user side. . That is, the manufacturer can provide a model having the same specifications regardless of the destination area, and the manufacturing efficiency is greatly improved. Further, as shown in the processing of FIG. 5, if the display language and the protocol are automatically set, it is not necessary to perform the setting according to the area of the shipping destination before shipping. As described above, if the frequency can be automatically switched, it is not always necessary to set the frequency.

From the user's point of view, one mobile phone 1 can be used in various regions for general purposes, so that the purchased mobile phone can be used efficiently, and of course, other phones unfamiliar with foreign countries can be used. There is no inconvenience of having to use it. And when using in different regions, you only need to change the region setting at least,
No complicated setting change is required for use. Of course, if the frequency switching is also automated as described above, the user can use it in each area without being conscious of the settings. Also, by setting the display language in the display language fixed mode, there is no inconvenience for the user.

Although the embodiments of the present invention have been described above, it goes without saying that various modifications can be considered as the telephone device of the present invention.

[0043]

As described above, the telephone device according to the present invention can be used in accordance with the identification information of the area of use or the carrier.
The control means controls the oscillating means so that a required frequency signal is output, and changes the setting of processing required for transmission / reception processing. Therefore, it is not necessary for the manufacturer to provide a telephone device having a different specification in each region, and the efficiency of the production can be measured, and for the user, for example, the device can be used as it is when traveling abroad. This has the effect that the familiar telephone device can be used effectively.

The setting of the region and the like can be accurately changed by the user using the input means. Further, by automatically discriminating the area and the like by the discriminating means, there is an effect that the user can use the telephone device in each area without paying particular attention to the area setting and the like.

With respect to the display means capable of displaying the character information, the control means sets the language of the character information to be displayed to the language used in the use area according to the information of the use area. By executing the display operation, for example, when the manufacturer ships, the use environment according to the destination area is set. In addition, since the language of the character information to be displayed can be fixed to a specific language regardless of the region, there is no inconvenience when a certain user continuously uses the language in various regions.

[Brief description of the drawings]

FIG. 1 is a block diagram of a mobile phone according to an embodiment of the present invention.

FIG. 2 is a block diagram of a frequency synthesizer of the mobile phone according to the embodiment;

FIG. 3 is an explanatory diagram of transmission and reception frequencies in various regions.

FIG. 4 is an explanatory diagram of frequency signals used for transmission / reception processing corresponding to various regions.

FIG. 5 is a flowchart of a setting change process according to the embodiment.

[Explanation of symbols]

1 mobile phone, 2 antenna duplexer, 3 receiver, 4
Frequency synthesizer, 5 baseband processor, 6,
Reference Signs List 9 oscillator, 10 transmission unit, 11 control unit, 12 operation unit, 13 RAM, 14 display unit, 15 ROM, 21
VCO, 23 programmable frequency divider, 25 reference frequency divider, 26 phase comparator

Claims (5)

[Claims] 1. An oscillator for oscillating and outputting various frequency signals used for transmission / reception processing, and oscillating means having a variable oscillation output frequency and frequency information used for transmission / reception processing corresponding to identification information indicating a region or a communication carrier. Storage means for storing, in accordance with the identification information, controlling the oscillating means so that a required frequency signal indicated by the frequency information of the storage means is output, and in accordance with the identification information, A telephone device comprising: a control unit that can change a setting of a process required for the telephone device. 2. An input means capable of inputting at least information on a region or a communication carrier using the telephone device as the identification information, wherein the control means responds to the identification information from the input means. And controlling the oscillating means so that a required frequency signal indicated by the frequency information of the storage means is output, and performing setting change of necessary processing for transmission / reception processing. The telephone device as described. 3. An identification means for judging an area or a telecommunications carrier in which the telephone device is used from received information, wherein the control means identifies the use area or the telecommunications carrier determined by the discriminating means. The information processing unit controls the oscillation unit so that a necessary frequency signal indicated by the frequency information of the storage unit is output, and performs setting change of a necessary process for transmission / reception processing. The telephone device according to claim 1. 4. A display means capable of displaying character information, wherein the control means uses a language of the character information to be displayed on the display means in accordance with the identification information in a region where the character information is used. 2. The telephone device according to claim 1, wherein a display operation is executed by setting the language to a certain language. 5. The display device according to claim 1, wherein the control unit fixes the language of the character information to be displayed on the display unit to a specific language irrespective of the identification information in accordance with a mode state set by an operation. 5. The method according to claim 4, wherein
A telephone device according to item 1.