KR20020052024A - Mobile station capable of using two mobile communication service - Google Patents

Abstract

PURPOSE: A terminal apparatus capable of doing two mobile communication services is provided to use selectively two numbers of a cellular phone by using one terminal, thereby capable of securing an additional subscriber in a mobile service providing company. CONSTITUTION: When an RF signal is inputted, a plurality of IF transmitters/receivers(100,200) convert the RF signal into an IF signal by using a local frequency, simultaneously perform a down-conversion as baseband signals of audio and video and then transmit the signal and also, when the baseband signal of audio and video are received, perform an up-conversion as IF signals, simultaneously converts the signal into RF signals again by using the local frequency and thereafter transmit the signals. When the RF signals are received, an RF receiving unit(400) performs a low noise amplification of the signal, simultaneously a filtering function and thereafter transmits the signals to the plurality of IF transmitters/receivers(100,200). When RF signals are inputted from the plurality of IF transmitters/receivers(100,200), respectively, an RF transmission unit(300) amplifies the gain of the RF signals and then transmits the signals. When the RF signal is inputted through the base station via an antenna, a duplexer(500) passes the RF signal on to the RF receiving unit(400) and also, when the RF signal is inputted from the RF transmission unit(300), passes the RF signal on to the antenna.

Description

Terminal equipment capable of two mobile communication services {MOBILE STATION CAPABLE OF USING TWO MOBILE COMMUNICATION SERVICE}

The present invention relates to a terminal device capable of two mobile communication services, and more specifically, to each mobile phone number transmitted from a base station independently using two mobile station modems (MSMs). The present invention relates to a terminal device capable of two mobile communication services.

As is well known, with the increasing importance of privacy, the number of mobile subscribers using both work and personal phones is increasing. However, CDMA (Code Division Multiple Access) terminals so far have only one mobile phone number. Inevitably, they had to carry two separate CDMA handsets for the two mobile phone numbers, or used two in-company numbers, such as the two-number service provided by service providers.

However, the current terminal cannot select one of the service numbers provided, and only communicates with the base station's telephone number at one time and uses the same kind of service when communicating with the base station. Even if two mobile phone numbers are set in one terminal, there is a problem that transmission / reception is impossible for the number of the two numbers that is not communicating with the base station.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to secure additional subscribers in a mobile phone service provider by selectively using two mobile phone numbers using one terminal. It is possible to provide a terminal device capable of two mobile communication services that can contribute to the increase in profitability and the manufacturer's sales.

In order to achieve the above object, the two mobile communication service terminal apparatuses, when receiving an RF signal, modulates the IF signal using a local frequency and down-converts the baseband signal of voice and video while transmitting the RF signal. A plurality of IF transmitters / receivers for converting the baseband signals into IF signals when they receive audio and video baseband signals and modulating them back to RF signals using local frequencies;

An RF receiver for amplifying low noise upon receiving an RF signal and simultaneously filtering the RF signal and transmitting the filtered RF signal to the IF transmitter / receiver;

An RF transmitter that amplifies and transmits gains of the RF signals when the respective RF signals are input from the plurality of IF transmitters / receivers; And

When receiving an RF signal from the base station through the antenna to pass the RF signal to the RF receiver, while receiving an RF signal from the RF transmitter comprises a duplexer for passing to the antenna.

1 is a functional block diagram showing an internal configuration of a terminal device capable of two mobile communication services according to an embodiment of the present invention;

FIG. 2 is a functional block diagram illustrating a detailed configuration of a first transmitting / receiving unit among two mobile communication serviceable terminal devices according to FIG. 1;

FIG. 3 is a functional block diagram illustrating a detailed configuration of a second transmitting / receiving unit among two mobile communication serviceable terminal devices according to FIG. 1;

4 is a functional block diagram illustrating a detailed configuration of an RF transmitter of two mobile communication services according to FIG. 1;

FIG. 5 is a functional block diagram illustrating a detailed configuration of an RF receiver of two mobile communication services according to FIG. 1;

6A is a functional block diagram illustrating a detailed configuration of an IF transmitter of a first IF transmitter / receiver according to FIG. 2;

6B is a functional block diagram illustrating a detailed configuration of an IF transmitter of a second IF transmitter / receiver according to FIG. 3;

FIG. 7A is a functional block diagram illustrating a detailed configuration of an IF receiver of a first IF transmitter / receiver according to FIG. 2;

FIG. 7B is a functional block diagram illustrating a detailed configuration of an IF receiver of the second IF transmitter / receiver according to FIG. 3.

<Explanation of symbols for the main parts of the drawings>

100: first IF transmitter / receiver 200: second IF transmitter / receiver

300: RF transmitter 400: RF receiver

500: duplexer

Hereinafter, two mobile communication service terminals according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a functional block diagram of a terminal device capable of two mobile communication services according to an embodiment of the present invention, and the terminal device capable of two mobile communication services according to an embodiment of the present invention includes a plurality of IF (Intermediate Frequence). ) Includes a transmitter / receiver 100, 200, an RF (Radio Frequence) transmitter 300, an RF receiver 400, and a Duplexer 500.

When the plurality of IF transmitters / receivers 100 and 200 receive RF signals from the RF receiver 400, they are modulated into IF signals using local frequencies and then down-converted to baseband signals for transmission to a microphone or receiver. On the other hand, when the baseband signal is received from the microphone or the receiver, the baseband signal is up-converted to the IF signal and simultaneously modulated into the RF signal using the designated local frequency and transmitted to the RF transmitter 300. 2 and 3, the MSM 110, 210, IF transmitters 120 and 220, IF receivers 130 and 230, and PLL (Phase Locked Loop) 140 and 240 are included. do.

In addition, the MSMs 110 and 210 mounted in the plurality of IF transmitters and receivers 100 and 200 convert the IF signals into audio and video signals when they receive baseband signals from the IF receivers 130 and 230. While transmitting to a microphone or a receiver and receiving audio and video signals from the microphone or receiver, the audio and video signals are converted into baseband signals and output to the IF transmitters 120 and 220, and the IF signals are output to a designated RF signal. It is responsible for transmitting the PLL data for modulation to the PLL, respectively. At this time, the PLL data of the MSM (110, 210) contains the unique frequency of the company that performs each mobile communication service.

In addition, the IF transmitters 120 and 220 mounted in the plurality of IF transmitters and receivers 100 and 200 up-convert the baseband signals into IF signals, respectively, from the MSMs 110 and 210, and simultaneously localize the IF signals. It mixes with frequency and modulates it into a designated RF signal and transmits them to the RF transmitter 300, respectively, and as shown in FIG. 6, IF transferrs 121 and 221 and IF SAW (Surface Acoustic Wave Filter). ) Filters 122, 222, and up mixers 123, 223.

IF transformers 121 and 221 mounted in the IF transmitters 120 and 220 receive baseband signals from the MSMs 110 and 210, respectively, and up-convert the IF bands to the IF signals. 122 and 222, respectively.

In addition, the IF SAW filters 122 and 222 mounted in the IF transmitters 120 and 220 respectively compensate for the damaged gain of the up-converted IF signal after receiving the IF signals from the IF transferrs 121 and 221, respectively. It plays a role.

In addition, the up mixers 123 and 223 mounted in the IF transmitters 120 and 220 receive IF signals from the IF SAW filters 122 and 222, respectively, and simultaneously designate local frequencies specified by the PLLs 140 and 240, respectively. Each input is modulated into an RF signal and then transmitted to the RF transmitter 300.

In addition, IF receivers 130 and 230 mounted in the plurality of IF transmitters / receivers 100 and 200 receive an RF signal from the RF receiver 400 and mix the RF signal with a specified local frequency to modulate the IF signal. Thereafter, the IF signal is down-converted to a baseband voice signal and then transmitted to the MSMs 110 and 210, respectively, as shown in FIG. 7, an IF receiver 131 and an IF. SAW filter 132, and Down Mixer 133.

The down mixer 133 mounted in the IF receivers 130 and 230 receives RF signals from the RF receiver 400 and modulates them into IF signals after receiving specified local frequencies from the PLLs 140 and 240. To the MSM 110 and 210, respectively.

In addition, the IF SAW filter 132 mounted in the IF receivers 130 and 230 compensates for the damaged gain of the modulated IF signal after receiving the IF signal from the down mixer 133, respectively.

IF receivers 131 mounted in the IF receivers 130 and 230 receive IF signals from the IF SAW filter 132, respectively, down convert the IF signals into baseband signals to the MSM 110 and 210. Each plays a role.

When the PLLs 140 and 240 mounted in the plurality of IF transmitters and receivers 100 and 200 receive the PLL data from the MSMs 110 and 210, respectively, the PLLs 140 and 240 transmit corresponding local frequencies to the IF transmitters 120 and 200, respectively. 220) and the IF receiver 130 and 230, respectively.

In addition, the RF transmitter 300 amplifies and transmits gains of the RF signals when receiving the RF signals from the plurality of IF transmitters / receivers 100 and 200, respectively, as shown in FIG. RF SAW filters 310, 330, a driver amplifier 320, and a power amplifier 340.

The plurality of RF SAW filters 310 and 330 mounted in the RF transmitter 300 compensate for the damaged gain after receiving RF signals from the plurality of IF transmitters / receivers 100 and 200, respectively.

In addition, the drive amplifier 320 mounted in the RF transmitter 300 amplifies the gain of the RF signal received from the SAW filter 310 and transmits the gain to the RF SAW filter 330.

In addition, the power amplifier 340 mounted in the RF transmitter 300 receives the RF signal from the drive amplifier 320 through the RF SAW filter 330 and amplifies the power amplifier 340 so as to enable long-distance transmission. 500).

In addition, when the RF receiver 400 receives an RF signal through an antenna, the RF receiver 400 performs low noise amplification and filtering and transmits the filtered signals to the plurality of IF transmitter / receivers, as shown in FIG. 5. 410, an RF SAW filter 420.

The LNA 410 mounted in the RF receiver 400 receives an RF signal from the duplexer 500 and amplifies low noise to transmit the RF signal to the RF SAW filter 420.

In addition, the RF SAW filter 420 mounted in the RF receiver 400 serves to compensate for the impaired gain of the RF signal amplified from the LNA 410.

The duplexer 500 passes the RF signal to the RF receiver 400 when the RF signal is received from the base station through the antenna, and passes the RF signal to the antenna when the RF signal is received from the RF transmitter 300. do.

Next, an operation process of two mobile communication serviceable terminal devices having the above configuration will be described with reference to FIG. 1.

PCS mobile service companies such as 016, 018, and 019 each have different channels, and the terminal mixes unique frequencies with RF and IF signals to recognize different channels. The call is made through the channel. In addition, the two MSMs process a call service using each paging signal in one terminal to connect a call with a base station of each mobile communication service company.

Initially, the MSM 110, 210 transmits PLL data for the frequency of a designated mobile telecommunications service provider channel to the PLL to prepare for call allocation and call from a base station.

Then, when the call is allocated from the base station, the duplexer 500 receives the RF signal from the base station through the antenna and passes the RF signal to the RF receiver 400, and at the same time the channel information to the MSM (110, 210) Send it. At this time, the information transmitted to the MSM (110, 210) is the channel information of each mobile communication service company when the call is assigned.

Then, when the RF receiver 400 receives an RF signal from the duplexer 500, the RF receiver 400 amplifies and filters the low noise, and transmits the filtered RF signals to the plurality of IF transmitters / receivers 110 and 210.

Hereinafter, an operation process of the above-described RF receiver 400 will be described in detail with reference to FIG. 4.

First, the LNA 410 receives the RF signal from the duplexer 500 and then amplifies the low noise to transmit the RF signal to the RF SAW filter 420.

Then, the RF SAW filter 420 compensates for the impaired gain of the RF signal amplified from the LNA 410 and transmits it to the plurality of IF transmitters / receivers 100 and 200.

Subsequently, when the plurality of IF transmitters / receivers 100 and 200 receive an RF signal from the RF SAW filter 420, the plurality of IF transmitters / receivers 100 and 200 modulate an IF signal using a local frequency, and then modulate the IF signal into a baseband signal to obtain voice and video signals. Display to terminal user.

Hereinafter, an operation process of the plurality of IF transmitter / receivers 100 and 200 described above will be described in detail with reference to FIGS. 2 and 3.

First, IF receivers 130 and 230 mounted in the plurality of IF transmitters / receivers 100 and 200 receive RF signals from the RF receiver 400, mix them with designated local frequencies, modulate them into IF signals, and then Downconverting to a band voice signal and transmitting to the MSM 110 and 210, respectively.

Hereinafter, an operation process of the above-described IF receivers 110 and 210 will be described in detail with reference to FIG. 5.

First, the down mixers 133 and 233 mounted in the IF receivers 110 and 210 receive an RF signal from the RF receiver 400 and receive a specified local frequency from the PLLs 140 and 240 and then IF. Downconverting the signal to the IF SAW filter 132 and 232, respectively.

In addition, the IF SAW filters 132 and 232 mounted in the IF receivers 110 and 210 compensate for the damaged gain of the down-converted IF signal after receiving the IF signal from the down mixers 133 and 233. The data is transmitted to the IF receivers 131 and 231, respectively.

First, when the IF receivers 131 and 231 mounted in the IF receivers 110 and 210 receive an IF signal from the IF SAW filters 132 and 232, the IF signal is modulated into a baseband signal to thereby modulate the MSM 110. And 210, respectively.

Then, when the MSMs 110 and 210 mounted in the plurality of IF transmitters / receivers 100 and 200 receive baseband signals from the IF receivers 130 and 230, the baseband signals are restored to audio and video. Display each to the terminal user.

For example, if the 016 channel is referred to as the first MSM 110 and the 018 channel is referred to as the second MSM 210, the terminal recognizes the 016 channel when the designated call of 016 is allocated to the duplexer 500. Only the first MSM 110 may receive a baseband signal to display voice and video to a terminal user, and the second MSM 210 that recognizes the 018 channel may receive the 018 channel frequency even when an RF signal corresponding to the 016 channel is received. Since there is no baseband signal for this, information received through channel 016 cannot be received.

On the other hand, when a call is connected and transmitted through channel 016, the first IF transmitter / receiver 100 receives a baseband signal of voice and video from a terminal user and IF modulates the baseband signal and then modifies the 016 unique local frequency. By using the modulated RF signal again to be transmitted to the RF transmitter 300.

Hereinafter, the operation of the above-described first IF transmitter / receiver 100 will be described in detail with reference to FIG. 2.

First, the MSM 110 receives audio and video from a terminal user, converts the audio and video into a baseband signal, outputs the same to the IF transmitter 120, and modulates the IF signal into a designated RF signal. Is transmitted to the PLL.

Then, the IF transmitter 120 receives the baseband voice signal from the MSM 110 and up-converts the IF signal into an IF signal, mixes it with a 016 intrinsic local frequency, modulates it into a specified RF signal, and simultaneously transmits the RF signal to the RF transmitter 300 To send.

Hereinafter, the operation of the above-described IF transmitter 120 will be described in detail with reference to FIG. 6.

First, the IF transferr 121 receives a baseband signal from the MSM 110 and modulates the baseband signal into an IF signal and transmits the baseband signal to the IF SAW filter 122.

Then, the IF SAW filter 122 receives the IF signal from the IF transferr 121 and compensates for the impaired gain of the signal converted into the IF signal and transmits it to the up mixer 123.

Subsequently, the up mixer 123 receives an IF signal from the IF SAW filter 122 and at the same time receives a 016 uniquely designated local frequency from the PLL 140 and up-converts the RF signal to the RF transmitter 300. To send.

Then, when the RF transmitter 300 receives an RF signal from the first IF transmitter / receiver 100, the RF transmitter amplifies and transmits the gain of the RF signal.

Hereinafter, the operation of the above-described RF transmitter 300 will be described in detail with reference to FIG. 4.

First, the RF SAW filter 310 compensates for a damaged gain after receiving an RF signal from the first IF transmitter / receiver 100 and transmits it to the drive amplifier 320.

Then, the drive amplifier 320 amplifies the gain of the RF signal received from the SAW filter 310 and transmits it to the RF SAW filter 330.

Subsequently, the RF SAW filter 330 receives the RF signal from the drive amplifier 320 and compensates for the damaged gain and then transmits it to the power amplifier 340.

Then, the power amplifier 340 receives the RF signal from the drive amplifier 320 through the RF SAW filter 330 and amplifies the long distance transmission to be transmitted to the duplexer 500.

Subsequently, when the duplexer 500 receives the RF signal from the RF transmitter 300, the duplexer 500 transmits the RF signal to the 016 base station through an antenna.

As described above, according to the terminal device capable of two mobile communication services according to the present invention, the mobile phone service provider can additionally secure subscribers, thereby increasing the profitability and increasing the manufacturer's sales. In addition, a user using a mobile communication can reduce the cost of purchasing a terminal by using two mobile communication services with a single terminal without purchasing two terminals, and can selectively use each mobile communication service as needed. Excellent effects can be obtained.

Claims (6)

When RF signal is input, it modulates into IF signal using local frequency and down-converts to baseband signal of audio and video and transmits it.By receiving the baseband signal of audio and video, the baseband signal is converted into IF signal. A plurality of IF transmitting / receiving units for converting the RF signal using the local frequency at the same time as the up-converter and transmitting the RF signal; An RF receiver for amplifying low noise upon receiving an RF signal and simultaneously filtering the RF signal and transmitting the filtered RF signal to the IF transmitter / receiver; An RF transmitter that amplifies and transmits gains of the RF signals when the respective RF signals are input from the plurality of IF transmitters / receivers; And Passing the RF signal through the antenna from the base station to pass the RF signal to the RF receiver, while receiving the RF signal from the RF transmitter comprises a duplexer for passing through the antenna, characterized in that two mobile communication services Device. The method of claim 1, The plurality of IF transmitter / receivers include: a plurality of PLLs each outputting local frequencies corresponding thereto after receiving PLL data; When the baseband signal is received, the baseband signal is converted into an audio and video signal and transmitted to the microphone or receiver, respectively.When the audio and video signal is input from the microphone or receiver, the audio and video signal is converted into the baseband signal. An MSM which transmits PLL data to the PLL, respectively for transmitting and simultaneously modulating an IF signal into a designated RF signal; An IF transmitter for converting the baseband signal from the MSM into an IF signal, up-converting the baseband signal into an IF signal, mixing the local band signal with a local frequency, and modulating each of the baseband signals into a designated RF signal; And Receiving the RF signal from the RF receiver, each of the two mobile communication services comprising an IF receiver for mixing with a specified local frequency, modulated into an IF signal, down-converted back to a baseband signal and transmitted to the MSM, respectively. Available terminal device. The method of claim 1, The RF transmitter may include: a plurality of RF SAW filters configured to compensate for a damaged gain after receiving RF signals from the plurality of IF transmitters and receivers, respectively; A drive amplifier for amplifying and transmitting the gain of the RF signal received from the SAW filter; And And a power amplifier for amplifying and transmitting the RF signal from the drive amplifier to enable long-distance transmission. The method of claim 1, The RF receiver may include: an LNA that receives an RF signal from the duplexer and then amplifies and transmits the low signal; And And two RF SAW filters for compensating for the corrupted gain of the RF signal amplified from the LNA. The method of claim 2, The IF transmitter may include: an IF transferr configured to up-convert the baseband signal to an IF signal when the baseband signal is received from the MSM; An IF SAW filter for receiving an IF signal from the IF transformer and compensating for the damaged gain of the up-converted IF signal and outputting the same; And And an up mixer that receives an IF signal from the IF SAW filter and simultaneously modifies an RF signal after receiving a specified local frequency from the PLL and transmits the RF signal to the RF transmitter. . The method of claim 2, The IF receiver may include: a down mixer that receives an RF signal from the RF receiver and simultaneously modulates an IF signal after receiving a specified local frequency from the PLL; An IF SAW filter that receives the IF signal from the down mixer and simultaneously compensates for the damaged gain of the modulated IF signal; And And receiving an IF signal from the IF SAW filter and converting the IF signal into a baseband signal and transmitting the MS signal to the MSM.