KR20020079115A - Mobile communication terminal compatible with local area communications - Google Patents

Abstract

PURPOSE: A cellular phone performing multilateral local area communication is provided to periodically switch a switch module between a cellular phone mode and a radio mode by a control signal of a controller, to share a predetermined frequency between users, thereby enabling multilateral local area communication. CONSTITUTION: The first switch(sw1) performs conversion between a cellular phone mode and a radio mode. The second switch module(sw2) performs a transceiving conversion in the radio mode. The first switch(sw1) and the second switch(sw2) are coupled between a cellular phone transceiving module(10) and a radio transceiving module(20). The cellular phone transceiving module(10) is coupled with the first switch module(sw1) through the first interface(72) and a duplexer. The radio transceiving module(20) is coupled with the first switch module(sw1) through the second switch module(sw2) and the second interface(74). An antenna(ANT) is coupled with the first switch module(sw1) for transceiving signals. The first switch module(sw1) is shared in the cellular phone mode and the radio mode. The first interface(72) is arranged after the duplexer for the cellular phone transceiving module(10). The second interface(74) is arranged after the second switch module(sw2) for the radio transceiving module(20).

Description

Mobile communication terminal compatible with local area communications}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone device, and more particularly, to a mobile phone terminal capable of making a direct call by synchronizing frequencies between users in a short distance.

For example, in areas with poor phone sensitivity or poor call sensitivity, such as islands or mountainous areas, where calls are very poor, or where calls are congested, instead of making calls through a base station like a typical cell phone, Likewise, it is efficient to make a direct call without passing through a base station by using a predetermined separate frequency among users. It is also very cost effective if there is a direct call between users at close range.

Therefore, in recent years, a method for performing both functions by adding a function such as a walkie-talkie to a mobile phone or a portable device of a wireless phone has been studied.

Conventional radio-cordless telephone apparatuses are invented by Shim Sang-kyu and filed by Daewoo Electronics Co., Ltd. and published on June 26, 1997, Patent Publication No. 1997-0031733 "Wireless integrated telephone", or invented by Kang Hoon Korean Patent Publication No. 1998-0069086 entitled "Phone-to-Device Calling Device and Method thereof" filed by October 26, 1998, which was invented by Kim Hyang-gon and filed by Samsung Electronics. Patent Publication No. 2001-0011052 published on May 15, 2001, discloses a portable radio device in a wireless telephone. In addition, a conventional radio-compatible mobile phone is disclosed in Patent Publication No. 2000-0075280 "Wireless-Mobile Device", which was invented by Kim Nam-hoon and filed by Samsung Electronics and published on December 15, 2000.

The conventional radiotelephone device is to add a function such as a walkie-talkie to the mobile unit in a landline telephone having a fixed part and a moving part so that it can be used for both general phones and walkie-talkie. By adding functions such as radio to the terminal, it can be used for both mobile phones and radios.

However, the above prior arts are all configured to switch between a cellular phone mode (or a radiotelephone mode) and a radio mode only by a predetermined switching action, and manual operation is required to change to another mode while using one mode. In need. Thus, for example, even when a call comes to the corresponding terminal while operating in the radio mode, the terminal cannot recognize the call. On the contrary, even when a radio call signal is received to the corresponding terminal while operating in the mobile phone mode (or wireless telephone mode), the terminal receives the call. Could not be recognized.

Accordingly, an object of the present invention is to provide a cellular phone having a function of clarifying the priority between the cellular phone mode and the radio mode, and when the cellular phone call is received while operating in the radio mode, it automatically switches to the cellular phone mode. It is done.

In addition, an object of the present invention is to provide a mobile phone that the call acquisition function implemented in the mobile phone terminal can be performed even in the radio mode.

In addition, an object of the present invention is to provide a mobile phone capable of making a direct call by synchronizing frequencies with each other when there are no mobile phone calls.

In addition, an object of the present invention is to provide a mobile phone that can communicate in a mobile phone mode and a walkie-talkie mode with a single antenna.

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

2 is a control flowchart of a mobile phone according to a preferred embodiment of the present invention.

3 is a functional summary according to the input state of the mode switch key.

The present invention includes a cellular phone transmission / reception module operating in a cellular phone mode, a radio transceiver module operating in a radio mode, and a switch module for switching between cellular phone mode and a radio mode. The transceiver module also includes its own switch module for switching between transmission and reception.

The switch module of the present invention can be periodically switched between the cellular phone mode and the radio mode, the switching period is adjustable. The switch module of the present invention is periodically switched during operation in the radio mode to search for the arrival of the mobile phone call, and automatically switches the mobile phone from the radio mode to the mobile phone mode when the mobile phone call is captured. The switch module of the present invention is controlled by a controller included in the mobile phone.

The mobile phone transmission / reception module is a transmission / reception module suitable for existing mobile communication systems such as, for example, CDMA, GSM, AMPS, and IMT2000 communication systems, and may be implemented using existing mobile phone transmission / reception modules suitable for each communication method.

The transceiver module is a transceiver module suitable for a general conventional radio system including a living radio system such as an FRS system or an industrial radio system, that is, a conventional direct communication radio system that communicates directly without passing through a base station. It can be implemented using modules.

The cellular phone transmission / reception module and the transceiver module of the present invention are coupled to the switch module through appropriate matching devices, and through this, it is possible to process both cellular phone communication and radio mode communication with a single antenna.

The present invention further includes a keypad, input means such as a microphone, output means such as a display and a speaker, storage means such as a memory, frequency generating means such as an oscillator, and signal processing means such as a modulator.

Hereinafter, with reference to the accompanying drawings in accordance with a preferred embodiment of the present invention will be described. Among the components of the present invention, components that are well known in the related art are minimized.

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

The cellular phone transmission and reception module 10 and the transceiver transceiver module 20 of the present invention are coupled to the controller 40 through the modulator 30, respectively. Modulator 30 is also coupled to microphone 32, earphone 34, and speaker 36. Controller 40 is also coupled with keypad 52, display 54, memory 56, first and second oscillators 62, 64.

Between the cellular phone transmission / reception module 10 and the radio transceiver module 20, the first switch module sw1 of the present invention for switching between the cellular phone mode and the radio mode and the second switch of the present invention for transmitting / receiving switching in the radio mode. The module sw2 is coupled. The cellular phone transmission / reception module 10 is coupled to the first switch module sw1 through the duplexer DPX and the first matching device 72, and the transceiver module 20 is connected to the second switch module sw2 and the second matching device. It is coupled to the first switch module sw1 via the device 74. An antenna ANT for transmitting and receiving signals is coupled to the first switch module sw1.

The first switch module sw1 is shared in the cellular phone mode and the walkie talkie mode, and in the case of the cellular phone transmit / receive module 10, the first matching device is disposed after the duplexer DPX. By arranging the second matching device after the module sw2, both modes of communication can be performed through the single antenna ANT.

The controller 40 controls each of the above components. The first switch module sw1 for switching between the cellular phone transmission / reception module 10 and the transceiver transceiver module 20 of the present invention, and the second switch module sw2 for switching between transmission and reception in the radio mode. The control action of the controller 40 for the other components except for the control action for the operation may be made in a conventional manner.

In the preferred embodiment of the present invention, one microphone 32, one low power earphone 34, and one high power speaker 36 are used, and the microphone 32 and the earphone 34 operate modes of a mobile phone and a radio. Is controlled according to. The speaker 36 is used in the walkie-talkie mode, and the user can arbitrarily select and use the cellular phone mode.

The cellular phone transmission / reception module 10 operating at the frequencies f1, f2, f3, and f4 generated by the first oscillator 62 performs the cellular phone mode, and operates at the frequencies f5, f6, f7 made by the second oscillator 64. The transceiver module 20 performs a transceiver mode. The frequencies f1 and f2 are generated by the first oscillator 62 and controlled by the controller 40 to be used for transmission in the cellular phone transmission / reception module 10, and the frequencies f3 and f4 are also generated by the first oscillator and It is controlled by the controller 40 and used for reception in the cellular phone transmission / reception module 10. The frequency f5 is generated by the second oscillator 64 and controlled by the controller 40 to be used for transmission in the transceiver transceiver module 20, and the frequencies f6 and f7 are also generated by the second oscillator 64 and It is controlled by the controller 40 and used for reception in the transceiver transceiver module 20. The tone modulator (TONE) of the transceiver module 20 allows to secure more channels than pre-allocated channels in the transceiver mode. Signal processing procedures in the above-described mobile phone transmission / reception module 10, radio transceiver module 20, tone modulator (TONE), and the like are well known in the art.

The mobile phone transmission / reception module 10 of the present invention may operate in an existing communication system such as, for example, CDMA, GSM, AMPS, IMT2000 type communication system, in which case the operation of the mobile phone transmission / reception module 10 is basically Is the same as a typical mobile phone in a communication system.

When the user presses the SEND key through the keypad 52 when the mobile phone (ie, mobile station) is called, the mobile phone transmits an outgoing message to the base station through the access channel, and the receiving base station transmits to the mobile phone through the paging channel. A channel assignment message is sent to assign a call channel and transmit the telephone number to the MTSO. While the mobile switching center completes the call setup, the cellular phone receives the base station signal on the forward call channel and begins transmission on the reverse call channel. When the base station recognizes the mobile phone on the reverse call channel, the base station sends a confirmation message indicating that the call channel is completely initialized. Since the first call packet is transmitted from the mobile phone to the base station, the call is started. The first switch sw1 of the present invention is switched between the cellular phone transmission / reception module 10 and the radio transceiver module 20 to select a cellular phone mode and a radio mode. When operating in the mobile phone mode, terminals a and 의 of the first switch sw1 are connected to activate the mobile phone transmission / reception module 10 to enable communication between the mobile phone terminal and the base station. During operation in the cellular phone mode, the first switch sw1 is controlled to be locked until the cellular phone mode is terminated by the user. The keypad 52 of the cellular phone terminal may be provided with a mode switch key, and the first control signal CTL1 is applied to the first switch sw1 from the controller 40 by a user's switch key operation.

When the communication system receives the call, the base station where the mobile phone is located calls the mobile phone by generating a call signal including a call message through the paging channel. Upon receiving the call signal, the mobile phone automatically transmits and responds to a call response message through the access channel, and the base station transmits a channel assignment message to the mobile phone through the paging channel to allocate the call channel. The subsequent operation is similar to the case of call.

The first switch sw1 of the present invention is switched between a, b, c, and d in accordance with the synchronization time of the communication system in order to perform the above-mentioned call operation even when operating in the radio mode. That is, the first switch sw1 is periodically switched for the first time to enter the radio mode and / or after all the time to operate in the radio mode. This switching action is effected by the first control signal CTL1 from the controller 40. For example, when the system synchronization in the mobile phone is made at intervals of 2 seconds, the first switch sw1 switches about 80 ms from c, d to a, b once every 2 seconds and then returns to c, d again. This time period may be given by the communication system or selected through settings in the mobile phone. That is, the user can adjust the time period for call search according to his or her call trend. For example, a user who frequently uses the radio mode may set a longer period of time. In addition, a large number of users may set this time period if, for example, in a mountainous area, the radio mode call is advantageous in terms of quality and cost over the cell phone mode call. That is, the time period can be adjusted according to the frequency of use or importance of the cellular mode and the radio mode.

The paging channel of the CDMA communication system has a slot mode. In the slot mode, a message of a specific mobile phone (i.e., mobile station) is transmitted only through a designated slot at a predetermined predetermined time. The initial registration process allows the mobile phone to specify the slot to be used by the base station. These slots occur at least once every 2 seconds, up to every 128 seconds. The mobile station using the slot mode can reduce power by turning off the power at a time other than the designated slot. The mobile station may receive only some of the slots by command of slots in the paging channel. In particular, the switching period of the switching module of the present invention may be determined by this slot mode.

The first switch (SW1) continuously switches and checks the mobile phone message during all the times of transmission and reception in the radio mode. Therefore, when the mobile phone is called during the call in the radio mode, the switch is automatically switched to the mobile phone mode. Going through. From the moment it is automatically switched to the mobile phone mode, the call in the radio mode is temporarily suspended, and at the same time, the user can instruct the user to use the mobile phone mode by using the mode switch key of the keypad 52 after detecting an alarm such as an error tone. have. According to the user's instructions, the first switch sw1 is fixed after being connected to the positions a and b so that the call can be made in the future mobile phone mode. Of course, the user may instruct the user to continue using the radio mode by using the mode switch key of the keypad 52. At this time, the first switch sw1 is connected to the positions c and d so that the call can be made in the radio mode in the future. If there is a cell phone call during a call in the walkie-talkie mode, the above operation is repeated.

The second switch SW2 of the present invention is used in the radio mode and operates by the second control signal CT2 from the controller 40. The second switch sw2 is connected to a, b at the time of transmission and c, d at the time of reception. The keypad 52 of the cellular phone terminal may be separately provided with a transceiver transmit / receive key, and the second control signal CTL2 is applied to the second switch sw2 from the controller 40 by a user's manipulation key.

The mobile phone transmission / reception module 10 of the mobile phone terminal of the present invention is designed to meet the specifications of the existing mobile phone terminal to enable communication with existing mobile phone terminals, and the transceiver module of the mobile phone terminal of the present invention 20 It can be designed to meet the radio standards of the radio, for example, to enable communication with existing FRSs.

2 is a control flowchart of a mobile phone according to a preferred embodiment of the present invention.

When the power key is pressed through the keypad 52 of the cellular phone, the controller 40 of the cellular phone maintains the standby state of the cellular phone in step 100 and proceeds to step 110 in which the mode switching key of the keypad 52 is in a walkie-talkie mode. Check to see if it indicates a conversion. When the controller 40 receives the switch key signal for switching to the radio mode, the controller 40 proceeds to step 120 to perform an initial operation in the radio preparation mode. Proceed to perform normal mobile phone functions.

When the switchover signal to the transceiver mode is received, a preparation step for the transceiver mode is performed. That is, in step 120, the controller 40 applies the first control signal CTL1 to the first switch sw1 to connect a and b of the first switch sw1 to maintain the mobile phone mode. The second control signal CTL2 is applied to the second switch sw2 to set the transceiver initial mode to the reception mode. Subsequently, in step 130, the call signal from the mobile phone base station is examined, and if there is a call, the process proceeds to step 140 to perform a call processing function in the mobile phone mode. However, in both cases, since the first switch sw1 is connected to a and b, it can be regarded as substantially the same mode.

If there is no call in step 130, the process proceeds to step 300, and the transceiver mode is set by connecting c and d of the first switch sw1. At this time, the controller 40 supplies power to the transceiver transceiver module 20 by applying the first control signal CTL1 to the first switch sw1. That is, in step 300, c and d of the first switch are connected to supply power to the transceiver transceiver module 20. Although the second switch sw2 has already been described as being connected to c and d in the radio preparation mode of step 120, the second switch sw2 may be connected to c and d using the second control signal CTL2 in step 300.

In the radio mode, the keypad 52 may be used to select a transmission / reception frequency channel and a tone channel for transmission and reception in the radio mode.

When the transceiver mode is set in step 300, the control unit 40 checks whether a transmission / reception switch key signal is received in step 310, and when the transmission key signal is received, proceeds to step 320 to enter the transceiver transmission mode. If the transmission key signal is not received, go to step 400 to select whether to end the radio mode.

In operation 320, a and b of the second switch sw2 are connected to each other by the second control signal CTL2 from the controller 40 to perform a radio transmission mode. In the radio transmission mode, a signal generated by the mobile phone is transmitted through the antenna ANT via the second switch sw2, the second matching device, and the first switch. In step 330, when the transmission / reception key signal is received, when the transmission key is turned off, the process proceeds to step 340, where c and d of the second switch are connected, and the process returns to step 310. That is, it proceeds to the radio reception mode again.

On the contrary, if the transmission key signal is not received in step 310, the process proceeds to step 400. In step (400), the controller 40 checks whether the mode switch key signal of the keypad 52 is received. When the radio mode end signal is received, the controller 40 proceeds to step 410 to connect a and b of the first switch 1. Exit the walkie-talkie mode and enter the standby mode of the mobile phone (100). If the radio mode end signal is not received in step 400, the process proceeds to step 300 to the radio initial reception mode.

When entering the transceiver initial reception mode in step 300, the controller 40 generates the first control signal CTL1 periodically and periodically switches the first switch sw1 to switch to the instantaneous mobile phone mode. The timer performs a timer interrupt function to check whether a mobile call is reached. This timer interrupt function is performed continuously while the radio mode is active, ensuring that the handset's call signal is accurately identified at every handset system timing.

3 is a table summarizing an output state and its function according to the input state of each mode switch key.

As shown in FIG. 3, the cellular phone operates in a mobile phone mode, that is, in a state where the radio power is turned off. Even if the radio is turned on, if the SEND key is pressed, the device immediately goes into the mobile phone call mode. If the transceiver is powered on and the cellular phone transmit key is not pressed, the radio will automatically switch between the transceiver transmit and receive mode and the cellular search mode, depending on whether the slot is active or not. X in FIG. 3 indicates a state of Don't Care indicating that the operation is performed regardless of whether it is On or Off.

According to the present invention, in a region where a phone call cannot be made or a call is very poor due to low sensitivity of a call or an area where a call is congested, such as a island area or a mountain area, a predetermined separate frequency is shared between users, such as a radio, without passing through a base station. A mobile phone capable of short-range multi-party communication with which a direct call can be provided is provided.

In particular, the priority between the mobile phone mode and the radio mode of the present invention is clearly clarified, and when the mobile phone call is received while operating in the radio mode, and has a function to automatically switch to the mobile phone mode, such call capture function Can be performed in both cellular mode and walkie-talkie mode. In addition, since the present invention can communicate in a mobile phone mode and a walkie-talkie mode with a single antenna, it results in a simplified and cost-saving effect of the mobile phone terminal configuration.

On the other hand, the mobile phone terminal of the present invention can be used as a mobile phone and a mobile phone, as well as a conventional radio and a common radio frequency band is designed to use the communication of the mobile phone terminal of the same type as well as the existing radio. .

Claims (15)

A mobile phone transceiver module, a radio transceiver module, a switch module coupled between the mobile phone transceiver module and the radio transceiver module, for switching between a mobile phone mode in which the mobile phone transceiver module operates and a radio mode in which the radio transceiver module operates, and A multifunction terminal comprising a controller connected to a switch module and controlling an operation of the switch module. And the switch module can be periodically switched between the cellular phone mode and the transceiver mode by a control signal from the controller. The method of claim 1, And the switch module periodically switches while the multifunction terminal is operating in the walkie-talkie mode, thereby searching for the arrival of a mobile phone call. The method of claim 3, The switch module multi-function terminal, characterized in that for switching the operation mode of the multi-function terminal from the radio mode to the mobile phone mode when the mobile phone call is reached. The method of claim 1, The mobile phone transmitting and receiving module is a multi-function terminal, characterized in that suitable for a CDMA, GSM, AMPS or IMT2000 mobile communication system. The method of claim 1, The radio transceiver module is a multi-function terminal, characterized in that suitable for a radio system for direct communication including a household radio and an industrial radio. The method of claim 4, wherein And wherein the switch module is periodically switched between the cellular phone transceiver module and the transceiver transceiver module while the multifunction terminal is operating in the radio mode, periodically searching for the arrival of a mobile phone call. The method according to any of the preceding claims, And the controller applies a periodic control signal to the switch module to periodically search for the paging channel transmitted from the base station. The method of claim 7, wherein The switch module is a multifunction terminal, characterized in that operating in a cycle of about 2 seconds to 128 seconds. The method according to any one of claims 1 to 6, Multi-function terminal, characterized in that the operation period of the switch module can be set through the initial registration procedure. Cell phone transmission and reception module for mobile communication using a base station, a radio transceiver module for direct communication without using a base station, a cell phone mode and the transceiver module operating between the mobile phone transceiver module and the transceiver module and the mobile phone transceiver module operates A multifunction terminal comprising a switch module for switching between radio modes and a controller connected to the switch module to control an operation of the switch module. The switch module includes a first switch sw1 for switching between the cellular phone mode and the radio mode, and a second switch sw2 for switching between a transmission mode and a reception mode in the radio mode. The first switch is controlled by a first control signal from the controller and the second switch is controlled by a second control signal from the controller, And the first switch can be periodically switched between the cellular phone mode and the transceiver mode by a control signal from the controller. The method of claim 10, The controller generates a first control signal in response to a user's command input to the multifunction terminal to switch between a cellular phone mode and a radio mode, and a second control signal in response to another command of the user input to the multifunction terminal. Generating a switchover between the transmission mode and the reception mode in the radio mode. The method according to claim 10 or 11, wherein The mobile phone transmission and reception module is suitable for a CDMA communication system, The controller applies a periodic control signal to the switch module to periodically search for the paging channel transmitted from the base station using the slot mode of the CDMA system, The periodic control signal is a multi-function terminal, characterized in that generated once every two to 128 seconds. A mobile phone transceiver module, a radio transceiver module, a switch module coupled between the cellular phone transceiver module and the radio transceiver module for switching between a mobile phone mode in which the mobile phone transceiver module operates and a radio mode in which the radio transceiver module operates, and In the method of mode switching in the transmitting and receiving device comprising a controller connected to the switch module to control the operation of the switch module, The controller applying a periodic control signal to the switch module to search for a paging channel transmitted from a base station; Periodically switching between the radio transceiver module and the cellular phone transceiver module in response to the control signal; And If it is detected through the search of the paging channel by the periodic switching that the mobile phone call signal has been reached, the controller controls the switch module to be connected to the mobile phone transmission and reception module to operate in the mobile phone mode Mode switching method of the transmitting and receiving device comprising a. The method of claim 13, The mobile phone transmission and reception module is suitable for a CDMA, GSM, AMPS or IMT2000 mobile communication system, the radio module is suitable for a living radio or industrial radio communication system, And the step of searching for the paging channel by the controller is a step of searching for a paging channel using the slot mode of the paging channel of the mobile communication system. The method according to claim 13 or 14, The switching of the switch module periodically switching is a mode switching method of the transmission and reception apparatus, characterized in that for performing switching once every two to 128 seconds.