KR20000042768A - Method for implementing cellular phone - Google Patents

Abstract

PURPOSE: A method for implementing a complex cellular phone is provided to reduce charges and to optimize benefits of each mobile communication, by performing telephone services of a cordless telephone-second generation) system when subscribers call local codes, and by operating a personal communications service(PCS) system and the complex cellular phone when the subscribers call long-distance calls in areas out of the CT-2 services. CONSTITUTION: A complex cellular phone comprises a transmission only cellular phone unit, a reception/transmission digital cellular phone unit, and a controller. The transmission only cellular phone unit has a radio frequency(RF) unit of a transmission only cellular phone. The transmission only cellular phone unit performs communication by using a frequency channel allocated in the transmission only cellular phone, when callers transmit calls in areas within transmission services. The reception/transmission digital cellular phone unit has a RF unit of a reception/transmission digital cellular phone only. The reception/transmission digital cellular phone performs communication by using a frequency channel allocated in the reception/transmission cellular phone in regions out of the transmission services. The controller controls mode conversions of the transmission only cellular phone unit and the reception/transmission digital cellular phone, and controls the cellular phone units, so that communication can be performed through the mode-converted cellular phone units. A method for implementing the complex cellular phone comprises the steps of: if a mode is transferred into a transmission only cellular phone mode, driving the RF unit of the transmission only cellular phone to check whether the mode is within one of the transmission services areas; if so, performing a transmitting call by using the allocated frequency channel; if the mode is out of the transmission services areas, transferring the mode into a reception/transmission digital cellular phone mode, and driving the RF unit of the reception/transmission digital cellular phone to perform the transmitting call, by using the allocated frequency channel of the reception/transmission digital cellular phone; and if the mode is standing-by or receives the transmitting call, driving the reception/transmission digital cellular phone.

Description

Composite mobile phone and its implementation method

The present invention relates to a composite mobile phone which is a combination of a mobile phone exclusively for outgoing calls and a digital mobile phone capable of incoming / outgoing calls, and in particular, a complex configuration of a cordless telephone-2nd generation (CT-2) and a personal communications service (PCS) or The present invention relates to a composite cellular phone consisting of a composite structure of a CT-2 and a digital CDMA cellular and a method of implementing the same.

In general, a mobile communication terminal is currently performing a wireless communication network service by CT-2, cellular, and PCS to each system, and each of the mobile communication terminals has a unique characteristic to secure a subscriber. Looking at the characteristics of each of the mobile communication terminal;

CT-2 is a pedestrian-oriented one-way communication system that operates at a frequency of about 900 MHz. Since there is no handoff function, the CT-2 can communicate only within a limited range centered on a base station. Inexpensive, low call charge, low cost, small size, low cost, easy to disseminate, and has the characteristics that are suitable for the densely populated urban area rather than village area to increase the effectiveness of the system construction.

Cellular (especially digital CDMA cellular) is a two-way wireless communication method capable of incoming and outgoing calls, operating at a frequency of about 1.5 GHz and capable of roaming and handoff. There is an expensive disadvantage compared to other mobile communication terminals.

PCS is a personal mobile communication service that is similar to the existing phone service and cellular mobile communication service, and the call charge is also intermediate between them, so it can be used freely like a mobile phone and can be used freely in terms of call charges. Currently operating at a frequency of about 1.8GHz, it is a mobile communication system for the next generation mobile communication FPLMTS (Future Public Land Mobile Telecommunication System).

As described above, each of CT-2, cellular, and PCS has its own unique characteristics. However, each mobile communication is incompatible with the service, so the selected mobile communication can receive only the service operated by each system. This is a very unreasonable phenomenon for the user of the mobile communication terminal. Because in terms of communication rates, CT-2 is the lowest price compared to regular phone charges, PCS is about halfway between cellular and regular phone rates, and cellular is the most expensive. It is said that PCS or cellular which can be called / outgoed is more excellent than CT-2. If the PCS or cellular user can use the CT-2 in the service right at the outgoing call, the user will be able to use the telephone service at a low cost, but until now, such a complex terminal and service have not been provided. Therefore, there is a disadvantage in that an expensive call fee must be paid even when making a local call using a PCS or a cellular terminal.

Accordingly, an object of the present invention is to provide a composite cellular phone and a method of implementing the same, in which a user of a PCS and a cellular terminal can receive a telephone service using CT-2 when calling within a CT-2 service right to solve the above problems. In providing.

The present invention to achieve the above object; An outgoing cell phone unit having a radio frequency unit dedicated to an outgoing cell phone and performing communication using a frequency channel assigned to the outgoing cell phone when transmitting within a service right of the outgoing cell phone; An incoming / outgoing digital cellular telephone unit for performing communication using a frequency channel assigned to the incoming / outgoing digital cellular phone when the incoming or outgoing call is provided in an out-of-area area or an out-of-service area of the outgoing-only cellular phone with a radio frequency unit; In the implementation method of the composite mobile phone comprising a control unit for controlling the mode switching to the mobile phone unit and the incoming / outgoing digital mobile phone unit, and the communication via the mode-changed mobile phone unit, the call-only call when switching to the call-only phone mode Mobile phone dedicated to the transmission by driving a dedicated radio frequency unit of the mobile phone A process of checking whether the service right is in the service right, a process of performing an outgoing call using a frequency channel allocated to the call-only only if the call-only service right is within, and an operation mode when the call-only service right is not received. Converting to a digital cellular phone mode and driving a radio frequency unit dedicated to the incoming / outgoing digital cellular phone to perform an outgoing call using a frequency channel assigned to the incoming / outgoing digital cellular phone unit; Characterized in that the process of driving the outgoing digital mobile phone unit.

1 is a block diagram of a composite mobile phone in which CT-2 and PCS are combined

2 is a block diagram of a composite cellular phone in which CT-2 and digital CDMA cellular are combined;

3 is an operation control flowchart of a CT-2 and a PCS / digital CDMA cellular composite mobile phone.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as much as possible even if they are displayed on different drawings. In addition, in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention, such as specific processing flows. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

The present invention is particularly implemented in the embodiment of the present invention, in order to implement a composite mobile phone that is a combination of a mobile phone and a digital phone capable of incoming / outgoing calls, CT-2 (Cordless Telephone-2nd Generation) and PCS (Persnal Communications Service: Personal) It is a complex mobile phone composed of a combination of a communication service) and a composite mobile phone composed of a combination of CT-2 and digital CDMA cellular, and a method of controlling the operation of the mobile phone using the same. Described through the drawings;

1 is a block diagram of a composite cellular phone in which CT-2 and PCS are combined.

The composite mobile phone illustrated in FIG. 1 is composed of a CT-2 mobile phone unit, a PCS mobile phone unit, a common unit used in common, and a main control unit that collectively controls each component unit.

The CT-2 mobile phone unit controls the CT-2 radio frequency (RF) unit 20 when operating as the CT-2 mobile phone to communicate with a base station dedicated to CT-2 and a frequency channel dedicated to CT-2. It is composed of a CT-2 control unit 30 in charge of performing, and a CT-2 radio frequency unit 20. Here, the CT-2 radio frequency unit 20 includes a transmission / reception separator, a receiver, a transmitter, a frequency synthesizer, and a signal processor. The frequency synthesizer generates a frequency for designating a transmission / reception channel of the transmitter and the receiver under the control of the CT-2 controller 30. In addition, the transmission / reception splitter separates a radio signal to be transmitted or received, and serves as a transmission / reception separation that is transmitted to the antenna, the antenna matching unit 10 and the reception unit. The receiver outputs the radio signal separated from the transmission and reception separation unit by filtering and low noise amplification, and converts the frequency into a signal processor. The transmitter converts a signal input from the signal processor to a frequency converter and outputs the signal to the transceiver. The signal processor operates under the control of the CT-2 controller 30, demodulates the digital signal input through the receiver, converts the digital signal into an analog voice signal, and transmits the analog voice signal through the speaker. In addition, the signal processing unit digitally converts the input analog voice signal, modulates it into a digital signal, and outputs the digital signal. The signal processor includes a tone generator and generates a tone through a buzzer under the control of the CT-2 controller. The CT-2 mobile phone unit is controlled to be driven by the main control unit 50, and the CT-2 control unit 30 transmits and receives a voice call and data related signals with the main control unit 50 when driven by the CT-2 mobile phone. The main controller 50 is connected to the memory 60, the keypad 70, the display unit 80, the voice processing unit 90, the microphone MIC, and the speaker SPK.

In addition, the PCS mobile phone unit controls the PCS RF unit 40 and the PCS RF unit 40 to perform communication using a frequency channel dedicated to the PCS base station and PCS when operating as the PCS mobile phone, the overall operation of the composite mobile phone It consists of a main control unit 50 to control the. The PCS RF unit 40 outputs a radio signal input through the antenna to a demodulator (not shown) after signal processing such as filtering, and the demodulator demodulates the input high frequency signal into an original signal. )

The antenna matching unit 10 receives the radio signals of different frequency bands of the CT-2 and the PCS transmitted and received through the antenna ANT, separates them, and matches them with the corresponding radio frequency units. Transmits the wireless signal through the antenna.

As the common part, the keypad 70 is composed of numeric keys and function keys for various dialing and outputs the corresponding key data to the main control part 50 by external operation, most of which is user operation, according to the present invention. And a key for selecting the CT-2 mode and the PCS mode. The display unit 80 receives various display data from the main control unit 50 and displays the corresponding contents. The memory 60 includes a ROM for storing a program required for the CT-2 and the PCS operation, and a RAM for temporarily storing data generated during the execution of the program. The voice processing unit 90 is connected to a microphone and a speaker, and processes the voice signal input and output through the microphone MIC and the speaker SPK.

As described above, in the composite mobile phone including the CT-2 mobile phone unit and the PCS mobile phone unit, when one of the radio frequency units is being driven, the other radio frequency unit is turned off. When the mobile phone is driven using the radio frequency unit 20 dedicated to the CT-2, first, it is checked whether the CT-2 transmission service right is within the CT-2 and then the CT using the CT-2 dedicated frequency channel at the time of transmission. -2 communicate with the base station; Since the CT-2 is exclusively outgoing, it operates in the PCS mode during the standby state or the incoming call, and operates in the PCS mode in the region outside the CT-2 service area or the suburban region. The CT-2 and PCS mode selection may be selected by the user using a mode selection key provided in the keypad 70, or switched to the CT-2 mode at the time of transmission to check the CT-2 electric field strength and press CT-2. Program to check whether the area within the service right to control the outgoing by operating the CT-2 mode in the CT-2 service area, and control the outgoing by driving the PCS mode in the out-of-CT or out-of-town area In accordance with the control of the main controller 50 may be.

As another embodiment according to the present invention, FIG. 2 is a block diagram of a composite cellular phone in which CT-2 and digital CDMA cellular are combined.

The composite mobile phone shown in FIG. 2 is composed of a CT-2 mobile phone unit, a digital CDMA cellular mobile phone unit, a common unit used in common, and a main control unit for overall control of each component.

The CT-2 mobile phone unit controls the CT-2 radio frequency (RF) unit 20 when operating as the CT-2 mobile phone to communicate with a base station dedicated to CT-2 and a frequency channel dedicated to CT-2. It is composed of a CT-2 control unit 30 in charge of performing, and a CT-2 radio frequency unit 20. Here, the CT-2 radio frequency unit 20 is the same as the configuration described with reference to FIG. 1 and the operation is the same. The CT-2 mobile phone unit is controlled to be driven by the main controller 150, and the CT-2 controller 30 transmits and receives a voice call and data related signal with the main controller 150 when driven by the CT-2 mobile phone. The main controller 150 is connected to the memory 160, the keypad 170, the display unit 180, the voice processor 190, the microphone MIC, and the speaker SPK.

In addition, a digital CDMA cellular (hereinafter, abbreviated as "CDMA") cellular phone unit is a digital CDMA cellular (abbreviated as "CDMA") RF unit that communicates with a CDMA base station and a CDMA dedicated frequency channel when operating as the CDMA cellular phone. 140 and the main control unit 150 to control the CDMA RF unit 140, and to control the overall operation of the composite mobile phone. The CDMA RF unit 140 outputs a radio signal input through the antenna to a demodulator (not shown) after signal processing such as filtering, and the demodulator demodulates the input high frequency signal into an original signal. )

The antenna matching unit 110 receives the radio signals of different frequency bands of the CT-2 and the CDMA transmitted and received through the antenna ANT, separates them, and matches them with the corresponding radio frequency units. Transmits the wireless signal through the antenna.

As the common part, the keypad 170 is composed of numeric keys and function keys for various dialing, and outputs the corresponding key data to the main control part 50 by external operation, most of which is a user's operation, according to the present invention. And a key for selecting the CT-2 mode and the CDMA mode. The display unit 180 receives various display data from the main controller 50 and displays corresponding contents. The memory 160 includes a ROM for storing a program required for the CT-2 and the CDMA operation, and a RAM for temporarily storing data generated during the execution of the program. The voice processing unit 190 is connected to a microphone and a speaker, and processes the voice signal input and output through the microphone MIC and the speaker SPK.

As described above, in the composite mobile phone including the CT-2 mobile phone unit and the CDMA mobile phone unit, when one radio frequency unit is being driven, the other radio frequency unit is turned off. When the mobile phone is driven using the radio frequency unit 20 dedicated to the CT-2, first, it is checked whether the CT-2 transmission service right is within the CT-2 and then the CT using the CT-2 dedicated frequency channel at the time of transmission. -2 communicate with the base station; Since the CT-2 is exclusively outgoing, it operates in a CDMA mode when in a standby state or an incoming call, and operates in the CDMA mode in an area outside the CT-2 service area or in an out-of-town area. The CT-2 and CDMA mode selection may be selected by the user using a mode selection key provided in the keypad 170. When the user is outgoing, the CT-2 mode is switched to check the CT-2 electric field strength. Program to control the origination by operating the CT-2 mode in the CT-2 service right by checking whether the area within the service right, and the CDMA mode in the out-of-the-country or out-of-town area of the CT-2 service. In accordance with the control of the main controller 150 may be.

In FIG. 1 and FIG. 2, the CT-2 mode communicates with the base station of the CT-2 system, and the PCS mode communicates with the base station of the PCS system. When operating in cellular mode, communication with the digital CDMA cellular system must be performed, so that the combined cellular phone must be registered with each system to operate separately with the two systems. That is, in the case of the combined mobile phone of CT-2 and PCS, the CT-2 system must be registered with a unique CT-2 terminal number, and the PCS system must be registered with a unique PCS terminal number.

3 is a flowchart illustrating the operation of the CT-2 and the PCS / CDMA composite mobile phone. This will be described in detail the implementation method of the composite mobile phone according to the present invention. In the description of the composite cellular phone implementation method, the configuration will be described with reference to FIGS. 1 and 2.

The main controller 50 or 150 operates in the PCS / CDMA mode, which is capable of both incoming and outgoing calls in the standby mode, and operates in the mode change A flow when the CT-2 mode changeover is selected by the user in step 300. When the main controller 50 or 150 applies the driving signal to the CT-2 controller 30 in the step, the CT-2 controller 30 executes the CT-2 mode program stored in the memory 60 or 160. Drive. The CT-2 controller 30 proceeds to step 312 to check the electric field strength of the CT-2 frequency received through the antenna. Thereafter, in step 313, the CT-2 controller 30 detects the area within the CT-2 service area by checking the electric field strength of the CT-2 frequency, and proceeds to step 314. Otherwise, the CT-2 controller 30 proceeds to the outside of the CT-2 service area. Next, the flow proceeds to step 321 of the B flow which will be described below. The CT-2 controller 30 applies the data for the serial process to the main controller 50 or 150, and the main controller 50 or 150 is applied by the signal applied from the CT-2 controller 30. Perform outgoing control. If it is determined in step 313 that the area within the CT-2 service right, the main control unit 50 or 150 proceeds to step 314 to drive the CT-2 radio frequency unit 20 to the CT-2 control unit 30. Command to turn off the drive of the PCS / CDMA radio frequency unit. Thereafter, the main controller 50 or 150 controls the outgoing call through the CT-2 control unit 30 and the CT-2 radio frequency unit 20 using a frequency channel dedicated to the CT-2 base station and the CT-2. In step 316, when the call ends, the CT-2 radio frequency unit 20 is turned off and the PCS / CDMA radio frequency unit 40 or 140 is driven to switch to the standby mode.

The flow of A is when the composite mobile phone operates in the CT-2 mode for exclusive use of the call, and the call is made. In the area within the CT-2 service area, that is, the downtown area, the CT-2 system is serviced and the rate is low. To perform a CT-2 call.

On the other hand, the B flow is a case where the composite mobile phone operates in the PCS and CDMA mode, a control flow that operates in the standby mode, incoming calls, or outside the CT-2 service area or suburban area.

Detailed description of the B flow; In step 321, when the CT-2 transmission is terminated or in the standby mode, the main controller 50 or 150 proceeds to step 322 in which the CT-2 control unit 30 transmits the CT-2 radio frequency unit 20. Instructs drive off, and controls the PCS / CDMA radio frequency unit 40 or 140 to drive. The CT-2 control unit 30 then checks the driving off of the CT-2 radio frequency unit 20. Then, the main controller 50 or 150 proceeds to step 323 to control the incoming / outgoing call using the dedicated frequency channel with the PCS / digital CDMA cellular base station through the PCS / CDMA radio frequency unit 40 or 140. In step 324, when the call ends, the PCS / CDMA radio frequency unit 40 or 140 is driven to perform standby mode switching as the PCS / CDMA mode.

On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, various modifications are of course possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention is a composite mobile phone composed of CT-2, PCS, CT-2 and Cellular, and can perform a telephone service by CT-2 during local calls, thereby obtaining the effect of cost reduction, and in the suburban area or CT. -2 Outside the service area, PCS or cellular can operate to take advantage of each mobile communication.

Claims (6)

In composite phones, A transmission-only mobile phone unit having a radio frequency unit dedicated to an outgoing mobile phone and performing communication by using a frequency channel assigned to the outgoing mobile phone when making a call within a service right of the outgoing mobile phone; Incoming / outgoing digital device that uses a frequency channel assigned to the outgoing / outgoing digital cell phone when incoming or outgoing in the out-of-area area or out-of-service area of the outgoing-only cell phone with a radio frequency unit exclusively for incoming / outgoing digital cell phone. Mobile phone section, And a control unit configured to control mode switching to the outgoing-only mobile phone unit and the incoming / outgoing digital mobile phone unit, and to control communication through the mode-switched mobile phone unit. The method of claim 1, The outgoing-only mobile phone is a composite mobile phone, characterized in that Citi-2 (CT-2). The method of claim 1, The incoming / outgoing digital mobile phone is a composite mobile phone, characterized in that a personal communication service (PCS). The method of claim 1, And the incoming / outgoing digital mobile phone is a digital code division multiple access (CDMA) cellular phone. A calling-only cell phone unit having a radio frequency unit dedicated to an outgoing-only cell phone and performing communication using a frequency channel assigned to the outgoing-only cell phone when calling within the outgoing service right of the outgoing-only cell phone; An incoming / outgoing digital cellular telephone unit for performing communication using a frequency channel assigned to an incoming / outgoing digital cellular phone when an incoming or outgoing call is provided in an out-of-town area or an out-of-service area of the outgoing dedicated mobile phone, In the implementation method of the composite mobile phone consisting of a control unit for controlling the mode switching to the mobile phone unit and the incoming / outgoing digital mobile phone unit, the communication is made via the mode-changed mobile phone unit, When switching to the outgoing-only cell phone mode, driving a dedicated radio frequency unit of the outgoing-only cell phone to check whether the outgoing-only cell phone is in the service right; Performing the outgoing call using the frequency channel allocated to the outgoing only service when the outgoing service right is within the service right; If the call-only service is out of the service mode, the operation mode is switched to the incoming / outgoing digital cell phone mode to drive a radio frequency unit dedicated to the incoming / outgoing digital cell phone to make an outgoing call using a frequency channel assigned to the incoming / outgoing digital cell phone part. To perform the process, Method of implementing a composite mobile phone, characterized in that the process of driving the incoming / outgoing digital mobile phone unit when waiting and incoming. The method of claim 5, And when one of the call-only phone unit and the incoming / outgoing digital phone unit is driven, performs another process of turning off the other phone unit.