CN105554199B - Intercommunication call method and smart phone based on smart phone - Google Patents
Intercommunication call method and smart phone based on smart phone Download PDFInfo
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- CN105554199B CN105554199B CN201610087651.8A CN201610087651A CN105554199B CN 105554199 B CN105554199 B CN 105554199B CN 201610087651 A CN201610087651 A CN 201610087651A CN 105554199 B CN105554199 B CN 105554199B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
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- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
The embodiment of the invention discloses intercommunication call methods and smart phone based on smart phone.The intercommunication call method based on smart phone includes: the preset intercom function of baseband chip starting in smart phone；In MCP main call process, the baseband chip is according to the first audio signal, generate the first baseband signal, first baseband signal is modulated into the first radiofrequency signal through modulation /demodulation module in the baseband chip, first radiofrequency signal is emitted after smart phone intermediate power amplifier amplification by antenna in the smart phone；In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is demodulated to the second baseband signal through the modulation /demodulation module, and second baseband signal is demodulated to the second audio signal through the baseband chip.Technical solution provided in an embodiment of the present invention increases intercom function for smart phone, the satisfaction that the user experience is improved.
Description
Technical field
The present invention relates to fields of communication technology, are based especially on the intercommunication call method and smart phone of smart phone.
Background technique
With the continuous development of mobile communication technology, smart phone because its be convenient for carrying and its stronger display effect with it is rich
Rich function, has become indispensable one of the routine use tool of people.Currently, mobile phone is conversed with another mobile phone
It is that call connection is established as transfer by base station, is the call mode of traditional " mobile phone-base station-mobile phone ".
However, existing mobile phone communication method is simpler, it is unable to satisfy user demand, for example, it is out of office to be frequently present of tourist
The case where (on such as mountain or marine) wanders away outside covers even without base station signal, causes since outdoor mobile phone signal quality is very poor
It is not available mobile phone communication, thus is made troubles to user.
Summary of the invention
The purpose of the present invention is to provide intercommunication call methods and smart phone based on smart phone, for smart phone
Intercom function is increased, the satisfaction of user experience is promoted.
On the one hand, the intercommunication call method based on smart phone that the embodiment of the invention provides a kind of, comprising:
Baseband chip starts preset intercom function in smart phone；
In MCP main call process, the first audio signal of the baseband chip foundation, the first baseband signal of generation, described first
Baseband signal is modulated into the first radiofrequency signal through modulation /demodulation module in the baseband chip, described in the first radiofrequency signal warp
After the amplification of smart phone intermediate power amplifier, emitted by antenna in the smart phone；
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is through the modulatedemodulate
Mode transfer block is demodulated to the second baseband signal, and second baseband signal is demodulated to the second audio signal through the baseband chip.
Another aspect, the embodiment of the invention provides a kind of smart phones, including baseband chip, power amplifier and day
Line, the baseband chip are configured with modulation /demodulation module, in which:
The baseband chip starts preset intercom function；
In MCP main call process, the first audio signal of the baseband chip foundation, the first baseband signal of generation, described first
Baseband signal is modulated into the first radiofrequency signal through the modulation /demodulation module, and first radiofrequency signal is through the power amplifier
After amplification, emitted by the antenna；
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is through the modulatedemodulate
Mode transfer block is demodulated to the second baseband signal, and second baseband signal is demodulated to the second audio signal through the baseband chip.
Technical solution provided in an embodiment of the present invention, after starting intercom function by the baseband chip of smart phone,
In MCP main call process, modulation /demodulation module penetrates modulates baseband signals at radiofrequency signal, and by what antenna transmission modulation obtained
Frequency signal；In called process, the radiofrequency signal that modulation /demodulation module receives antenna is demodulated to baseband signal, then by
Baseband chip is by modulation demodulation at audio signal, therefore the present embodiment is that smart phone increases intercom function, is promoted
The satisfaction of user experience.
Detailed description of the invention
Fig. 1 a is the flow diagram for the intercommunication call method based on smart phone that the embodiment of the present invention one provides；
Fig. 1 b is the radio circuit schematic illustration of smart phone in the prior art；
Fig. 2 a is the flow diagram of the intercommunication call method provided by Embodiment 2 of the present invention based on smart phone；
Fig. 2 b is half-duplex interphone circuit realization principle schematic diagram provided by Embodiment 2 of the present invention；
Fig. 3 a is the flow diagram for the intercommunication call method based on smart phone that the embodiment of the present invention three provides；
Fig. 3 b is the full-duplex interphone circuit realization principle schematic diagram that the embodiment of the present invention three provides；
Fig. 4 a is the structural schematic diagram for the smart phone that the embodiment of the present invention four provides；
Fig. 4 b is the circuit theory schematic diagram for the smart phone that the embodiment of the present invention four provides.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 a is the flow diagram for the intercommunication call method based on smart phone that the embodiment of the present invention one provides, the party
Method can be executed by smart phone.As shown in Figure 1a, which includes:
Baseband chip starts preset intercom function in step 11, smart phone.
In the present embodiment, baseband chip is for synthesizing baseband signal to be launched, or to the baseband signal received into
Row decoding, baseband chip can specifically include CPU (Central Processing Unit, central processing unit), modulatedemodulate mode transfer
Block, channel encoder, digital signal processor and interface module.Intercom function refers between mobile phone and mobile phone without passing through
In base station then the call mode of Direct Communication, i.e. the call mode of " mobile phone-mobile phone ", compared with the prior art in " mobile phone-base
Stand-mobile phone " mode, the call cost between the mobile phone being closer is reduced, especially in mobile data network signal matter
It is poor to measure, and when covering even without base station signal, can be realized the call connection between mobile phone, the satisfaction that the user experience is improved.
Step 12, in MCP main call process, the baseband chip generates the first baseband signal according to the first audio signal,
First baseband signal is modulated into the first radiofrequency signal, the first radio frequency letter through modulation /demodulation module in the baseband chip
Number through the smart phone intermediate power amplifier amplification after, emitted by antenna in the smart phone.
After CPU starts intercom function in smart phone, in MCP main call process, baseband chip obtains Mike in mobile phone and adopts
First audio signal is synthesized the first baseband signal by the first audio signal of collection, and by the first base band signal transmission to modulation
Demodulation module, modulation /demodulation module is by the first modulates baseband signals at the first radiofrequency signal, and the first radiofrequency signal is through power amplification
Emitted afterwards by antenna.
As shown in Figure 1 b, smart phone can support a variety of radio frequency bands at present, such as GSM850, GSM900,
PCS1900, DCS1800, Band40, Band41, Band34 and Band39 etc., when smart phone is in intercom mode, mobile phone
The radio frequency band call that smart phone is supported is chosen between mobile phone, that is, the tranmitting frequency of the first radiofrequency signal may belong to
The radio frequency band for stating smart phone support, specifically, modulation /demodulation module can generate setting by different modulation protocols
First radiofrequency signal of radio frequency band.
Step 13, in called process, the antenna receives the second radiofrequency signal, described in the second radiofrequency signal warp
Modulation /demodulation module is demodulated to the second baseband signal, and second baseband signal is demodulated to the second audio through the baseband chip and believes
Number.
In called process, antenna receives the second radiofrequency signal of the antenna transmitting of call opposite end (such as other mobile phones),
Antenna gives the second radio signal transmission to modulation /demodulation module, and modulation /demodulation module is according to preset demodulation agreement by the second radio frequency
Signal is demodulated to the second baseband signal, and subsequent baseband chip is by the second modulation demodulation at the second audio signal.
Similar with the first radiofrequency signal, the tranmitting frequency of the second radiofrequency signal also may belong to what above-mentioned smart phone was supported
Radio frequency band.Therefore, it after the intercom function starting of smart phone, can be supported using smart phone between mobile phone and mobile phone
Radio frequency band is directly conversed, only need to modulation /demodulation module supports modulates baseband signals at mobile phone in MCP main call process radio frequency
Frequency range, received radiofrequency signal can be demodulated to the identifiable base band of baseband chip by modulation /demodulation module in called process
Signal.
Technical solution provided in this embodiment, after the intercom function starting of smart phone, in MCP main call process, base band
For chip for synthesizing baseband signal to be launched, the modulated demodulation module of baseband signal to be launched is modulated into radio frequency to be launched
Signal；In called process, modulation /demodulation module is decoded the radiofrequency signal received, to generate the second base band letter
Number, the second baseband signal is demodulated to the second audio signal through baseband chip.Therefore, the present embodiment is that smart phone increases intercommunication
Machine function, the satisfaction that the user experience is improved.
Second embodiment
The present embodiment provides a kind of new intercommunication correspondent based on smart phone on the basis of the above embodiment 1
Method.Fig. 2 a is the flow diagram of the intercommunication call method provided by Embodiment 2 of the present invention based on smart phone.Such as Fig. 2 a institute
Show, which includes:
Baseband chip starts preset intercom function in step 21, smart phone.
Step 22, in MCP main call process, the baseband chip generates the first baseband signal according to the first audio signal,
First baseband signal is modulated into the first radiofrequency signal, the first radio frequency letter through modulation /demodulation module in the baseband chip
Number power amplification is carried out through the smart phone intermediate power amplifier, and after duplexer in the smart phone, passes through institute
Antenna in smart phone is stated to emit.
Fig. 2 b is half-duplex interphone circuit realization principle schematic diagram provided by Embodiment 2 of the present invention.As shown in Figure 2 b,
The intercom be TDD (Time Division Duplexing, time division duplex) standard, the interphone circuit include baseband chip,
Power amplifier, duplexer and antenna, wherein baseband chip includes modulation /demodulation module.In MCP main call process, Ke Yitong
It crosses duplexer control antenna and transmitting terminal (end TX) is connected, at this time first audio of the baseband chip according to Mike's acquisition in mobile phone
Signal generates the first baseband signal, and the modulated demodulation module of the first baseband signal is modulated into the first radiofrequency signal (such as BAND34 frequency
The radiofrequency signal of section), the first radiofrequency signal is emitted after power amplification by antenna.
Step 23, in called process, the antenna receives the second radiofrequency signal, described in the second radiofrequency signal warp
Duplexer is sent into the modulation /demodulation module and is demodulated to the second baseband signal, and second baseband signal is through the baseband chip
It is demodulated to the second audio signal.
With reference to Fig. 2 b, in called process, antenna can be controlled by duplexer and receives (end RX) conducting, this
When antenna receive the second radiofrequency signal, through duplexer by the second radiofrequency signal (such as radiofrequency signal of BAND34 frequency range) transmit
Modulation /demodulation module is given, the second radiofrequency signal is demodulated to the second baseband signal by modulation /demodulation module, and the second baseband signal is through base
Microarray strip is demodulated to the second audio signal, so that baseband chip can identify the audio signal of opposite end handset emissions.
Technical solution provided in this embodiment is based on existing mobile phone radio frequency hardware circuit scheme, passes through software and protocol layer
Realize easy TDD standard half-duplex intercom, the satisfaction that the user experience is improved, and no increase complete machine additional hardware
Expense, strong applicability are worthy of popularization.
3rd embodiment
The present embodiment provides a kind of new based on smart phone on the basis of above-described embodiment one and embodiment two
Intercommunication call method.Fig. 3 a is the process signal for the intercommunication call method based on smart phone that the embodiment of the present invention three provides
Figure.As shown in Figure 3a, which includes:
Baseband chip starts preset intercom function in step 31, smart phone.
Step 32, in MCP main call process, the baseband chip generates the first baseband signal according to the first audio signal,
First baseband signal is modulated into the first radiofrequency signal, the first radio frequency letter through modulation /demodulation module in the baseband chip
Number power amplification is carried out through the smart phone intermediate power amplifier, and after splitter in the smart phone, by described
Antenna emits in smart phone.
Fig. 3 b is the full-duplex interphone circuit realization principle schematic diagram that the embodiment of the present invention three provides.As shown in Figure 3b,
The interphone circuit includes baseband chip, power amplifier, splitter and antenna, and wherein baseband chip includes modulatedemodulate mode transfer
Block, signal is isolated splitter for transmitting and receiving, guarantees to receive and transmitting can work normally simultaneously, therefore the present embodiment
In intercom be FDD (Frequency Division Duplexing, frequency division duplex) standard.
Specifically, in MCP main call process, first audio signal of the baseband chip according to Mike's acquisition in mobile phone generates the
One baseband signal, the first baseband signal are modulated into the first radiofrequency signal (such as BAND3 through modulation /demodulation module in the baseband chip
The radiofrequency signal of frequency range), first radiofrequency signal carries out power amplification through power amplifier, after splitter, passes through antenna
Transmitting.
Step 33, in called process, the antenna receives the second radiofrequency signal, described in the second radiofrequency signal warp
It is sent into the modulation /demodulation module after splitter and is demodulated to the second baseband signal, second baseband signal is through the baseband chip
It is demodulated to the second audio signal.
With reference to Fig. 3 b, in called process, the second radiofrequency signal that antenna receives (believe by the radio frequency of such as BAND3 frequency range
Number) through splitter sending modulation /demodulation module to, the second radiofrequency signal is demodulated to the second baseband signal by modulation /demodulation module, and
Two baseband signals are demodulated to the second audio signal through baseband chip, so as to identify the audio signal of opposite end handset emissions.
In order to enable splitter can be effectively isolated the first radiofrequency signal and the second radiofrequency signal, first radiofrequency signal
It is different from the frequency range of second radiofrequency signal.For example, according to BAND3 frequency range, then the frequency range of the first radiofrequency signal
For 1710-1785MHz, the frequency range of the second radiofrequency signal is 1805-1880MHz.
Technical solution provided in this embodiment is based on existing mobile phone radio frequency hardware circuit scheme, passes through software and protocol layer
Realize easy FDD standard full-duplex interphone, the satisfaction that the user experience is improved, and no increase complete machine additional hardware
Expense, strong applicability are worthy of popularization.
Fourth embodiment
Fig. 4 a is a kind of structural schematic diagram for smart phone that the embodiment of the present invention four provides, and Fig. 4 b is the embodiment of the present invention
The circuit theory schematic diagram of four smart phones provided.In conjunction with Fig. 4 a and Fig. 4 b, which may include baseband chip, function
Rate amplifier and antenna, the baseband chip are configured with modulation /demodulation module, in which:
The baseband chip starts preset intercom function；
In MCP main call process, the first audio signal of the baseband chip foundation, the first baseband signal of generation, described first
Baseband signal is modulated into the first radiofrequency signal through the modulation /demodulation module, and first radiofrequency signal is through the power amplifier
After amplification, emitted by the antenna；
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is through the modulatedemodulate
Mode transfer block is demodulated to the second baseband signal, and second baseband signal is demodulated to the second audio signal through the baseband chip.
Further, which can also include duplexer, in which:
In MCP main call process, the first audio signal of the baseband chip foundation, the first baseband signal of generation, described first
Baseband signal is modulated into the first radiofrequency signal through the modulation /demodulation module, and first radiofrequency signal is through the power amplifier
Power amplification is carried out, and after the duplexer, is emitted by the antenna.
Further, in called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is through institute
It states the duplexer feeding modulation /demodulation module and is demodulated to the second baseband signal, second baseband signal is through the base band core
Piece is demodulated to the second audio signal.
Further, which can also include splitter, in which: in MCP main call process, the baseband chip
According to the first audio signal, the first baseband signal is generated, first baseband signal is modulated into the through the modulation /demodulation module
One radiofrequency signal, first radiofrequency signal carry out power amplification through the power amplifier, and after the splitter, pass through
The antenna transmitting.
Further, in called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is through institute
It states and is sent into the modulation /demodulation module after splitter and is demodulated to the second baseband signal, second baseband signal is through the base band core
Piece is demodulated to the second audio signal.
Further, first radiofrequency signal is different from the frequency range of second radiofrequency signal.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (12)
1. a kind of intercommunication call method based on smart phone characterized by comprising
The baseband chip of smart phone starts preset intercom function, wherein when the smart phone is in intercom mode,
The radio frequency band that smart phone is supported is chosen between smart phone and smart phone；
In MCP main call process, the baseband chip generates the first baseband signal, first base band according to the first audio signal
Signal is modulated into the first radiofrequency signal through modulation /demodulation module in the baseband chip, and first radiofrequency signal is through the intelligence
After the amplification of mobile phone intermediate power amplifier, emitted by antenna in the smart phone；
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is through the modulatedemodulate mode transfer
Block is demodulated to the second baseband signal, and second baseband signal is demodulated to the second audio signal through the baseband chip；
Wherein, the radio frequency band of first radiofrequency signal is the radio frequency band that the smart phone is supported；The modulation /demodulation
Module generates first radio frequency that radio frequency band is the radio frequency band that the smart phone is supported by corresponding modulation protocol
Signal；The baseband chip includes central processing unit, modulation /demodulation module, channel encoder, digital signal processor and interface
Module.
2. the method according to claim 1, wherein the baseband chip is according to first in MCP main call process
Audio signal, generates the first baseband signal, and first baseband signal is modulated into through modulation /demodulation module in the baseband chip
First radiofrequency signal, first radiofrequency signal pass through the intelligent hand after smart phone intermediate power amplifier amplification
Antenna emits in machine, comprising:
In MCP main call process, the baseband chip generates the first baseband signal, first base band according to the first audio signal
Signal is modulated into the first radiofrequency signal through modulation /demodulation module in the baseband chip, and first radiofrequency signal is through the intelligence
Mobile phone intermediate power amplifier carries out power amplification, and after duplexer in the smart phone, by the smart phone
Antenna transmitting.
3. according to the method described in claim 2, it is characterized in that, the antenna receives the second radio frequency in called process
Signal, second radiofrequency signal are demodulated to the second baseband signal, the second baseband signal warp through the modulation /demodulation module
The baseband chip is demodulated to the second audio signal, comprising:
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is sent through the duplexer
Enter the modulation /demodulation module and be demodulated to the second baseband signal, second baseband signal is demodulated to second through the baseband chip
Audio signal.
4. the method according to claim 1, wherein the baseband chip is according to first in MCP main call process
Audio signal, generates the first baseband signal, and first baseband signal is modulated into through modulation /demodulation module in the baseband chip
First radiofrequency signal, first radiofrequency signal pass through the intelligent hand after smart phone intermediate power amplifier amplification
Antenna emits in machine, comprising:
In MCP main call process, the baseband chip generates the first baseband signal, first base band according to the first audio signal
Signal is modulated into the first radiofrequency signal through modulation /demodulation module in the baseband chip, and first radiofrequency signal is through the intelligence
Mobile phone intermediate power amplifier carries out power amplification, and after splitter in the smart phone, passes through day in the smart phone
Line transmitting.
5. according to the method described in claim 4, it is characterized in that, the antenna receives the second radio frequency in called process
Signal, second radiofrequency signal are demodulated to the second baseband signal, the second baseband signal warp through the modulation /demodulation module
The baseband chip is demodulated to the second audio signal, comprising:
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is sent after the splitter
Enter the modulation /demodulation module and be demodulated to the second baseband signal, second baseband signal is demodulated to second through the baseband chip
Audio signal.
6. according to the method described in claim 4, it is characterized in that, first radiofrequency signal and second radiofrequency signal
Frequency range is different.
7. a kind of smart phone, which is characterized in that including baseband chip, power amplifier and antenna, the baseband chip includes
Central processing unit, modulation /demodulation module, channel encoder, digital signal processor and interface module, in which:
The baseband chip of the smart phone starts preset intercom function, wherein the smart phone is in intercom mould
The radio frequency band that smart phone is supported is chosen when formula, between smart phone and smart phone；
In MCP main call process, the baseband chip generates the first baseband signal, first base band according to the first audio signal
Signal is modulated into the first radiofrequency signal through the modulation /demodulation module, and first radiofrequency signal is amplified through the power amplifier
Afterwards, emitted by the antenna, wherein the radio frequency band of first radiofrequency signal is the radio frequency frequency that the smart phone is supported
Section；It is the radio frequency band that the smart phone is supported that the modulation /demodulation module, which generates radio frequency band by corresponding modulation protocol,
First radiofrequency signal；
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is through the modulatedemodulate mode transfer
Block is demodulated to the second baseband signal, and second baseband signal is demodulated to the second audio signal through the baseband chip.
8. smart phone according to claim 7, which is characterized in that further include duplexer, in which:
In MCP main call process, the baseband chip generates the first baseband signal, first base band according to the first audio signal
Signal is modulated into the first radiofrequency signal through the modulation /demodulation module, and first radiofrequency signal is carried out through the power amplifier
Power amplification, and after the duplexer, emitted by the antenna.
9. smart phone according to claim 8, which is characterized in that
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is sent through the duplexer
Enter the modulation /demodulation module and be demodulated to the second baseband signal, second baseband signal is demodulated to second through the baseband chip
Audio signal.
10. smart phone according to claim 7, which is characterized in that further include splitter, in which: in MCP main call process
In, the baseband chip generates the first baseband signal, first baseband signal is through the modulatedemodulate according to the first audio signal
Mode transfer block is modulated into the first radiofrequency signal, and first radiofrequency signal carries out power amplification through the power amplifier, and through institute
After stating splitter, emitted by the antenna.
11. smart phone according to claim 10, which is characterized in that
In called process, the antenna receives the second radiofrequency signal, and second radiofrequency signal is sent after the splitter
Enter the modulation /demodulation module and be demodulated to the second baseband signal, second baseband signal is demodulated to second through the baseband chip
Audio signal.
12. smart phone according to claim 10, which is characterized in that first radiofrequency signal and second radio frequency
The frequency range of signal is different.
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