KR0133218B1 - Cellular phone having multi-handset - Google Patents

Abstract

The present invention relates to a cellular phone and includes a plurality of handsets for performing radio transmission and reception through a low frequency radio wave and a cellular phone so as to perform communication using each handset in each seat of a vehicle or an office in a confined space. will be.

The present invention converts the high-frequency signals transmitted and received through the cellular phone into a weak radio wave that does not cause electromagnetic damage to the human body, thereby making calls with the handset smaller and lighter through a wireless channel, thereby providing convenience in use, and a small space. In the office of the phone, using a number of handsets with a unique number and password set to provide efficiency in use.

Multi-channel access eliminates the interference of radio waves and serves as a simple radio switching system to provide a secure call for many people.

Description

Wireless multi-handset for cell phones

1 is a block diagram of a typical cellular phone.

2 (a) and (b) are block diagrams illustrating a cellular phone module and a multi-handset according to the present invention.

* Explanation of symbols for main parts of the drawings

100: remote transmitter and receiver 200A to 200N: handset

210A to 210N: remote transceiver 220A to 220N: CPU

230A to 230N: Keypad 240A to 240N: Voice Processing

250A to 250N: display unit

TECHNICAL FIELD The present invention relates to a cellular phone. In particular, the cellular phone includes a plurality of handsets for transmitting and receiving through a wireless channel to perform good communication using each handset in each seat of a vehicle or an office in a confined space. It relates to a wireless multi-handset of one cell phone.

As can be seen in FIG. 1 of the accompanying drawings, a conventional general cellular phone includes a duplexer (1) for transmitting and receiving a high frequency radio signal of 800 MHz with a cell site side through an antenna ANT, and a cell site. A receiving unit 2 for receiving an incoming signal and a call message of a specific counterpart authorized, a transmitting unit 3 for transmitting a specific counterpart call signal and a transmission message to the cell site through the duplexer 1 for requesting a call connection; A frequency synthesizer (4) which synthesizes a carrier to a transmission voice signal, extracts a carrier from the received voice signal, and detects only a pure voice signal and a data signal; and a central processing unit (5) which controls the overall operation of the use of a cellular phone. And a first memory unit 6 storing operation program data according to the use of the cellular phone, and a second storing processing data transmitted and received such as location registration from the cell site. The memory unit 7, the third memory unit 8 for storing data such as Korean characters, special characters, telephone numbers, and the like, with the ten keys 0 to 9 and predetermined function keys, provide general key signals for use. A keypad 9 for input, a display unit 10 for displaying an operation state according to the use of a cellular phone, a modulated transmit voice signal to be transmitted to the cell site, and a demodulated receive voice signal applied from the cell site And a speaker SPK and a microphone MIC as a speech processing unit 11 and a handset means for processing.

As stated above, cell phones are used only by cell phones. In order to use them in transportation or confined space offices, they must be moved to the location of the cell phones. There is a need to have a lot of expense when installing a cell phone in each seat in the office.

In addition, since cellular phones transmit and receive through high frequency in the 800MHz band, frequent users may be fatally damaged by the high frequency, and if the cellular phone is not directly carried or stored in a place where it is difficult to use immediately, the incoming call will be immediately received. There is a problem that the call cannot be secured, and the office cannot smoothly make a call when the voice area of the partial wave is transmitted from the cell site.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to add a remote transmitting / receiving means using a low frequency to a cellular phone, and having the remote transmitting and receiving means and a plurality of handsets capable of transmitting and receiving through a wireless channel. Low frequency communication eliminates damage to the human body caused by radio waves and makes it possible to make convenient calls using handsets provided in their seats in narrow office spaces, and without carrying a cell phone directly. It is possible to respond quickly to an incoming call signal.

It is another object of the present invention to provide a high quality call service by using a handset after installing a cellular phone in a window, etc., where the amount of attenuation of radio waves is low when the office is a shade area of partial radio waves from the cell site.

A feature of the present invention for achieving the above object is a multi-handset device of a cellular phone having a cell phone and a plurality of handsets, wherein the cell phone is a low frequency by processing high-frequency radio signals transmitted and received with the cell site A first remote transmission unit for communicating with a radio signal; The multi-handset includes a first remote transceiver and a second remote transceiver for transmitting and receiving data signals and voice signals using a low frequency by a radio channel, a keypad unit for supplying a key signal for a call, and the cellular phone. A display for displaying an overall usage state of the voice signal, a voice processor for processing and demodulating the voice signal transmitted and received through the second remote transceiver, and analyzing a data signal applied through the keypad or the second remote transceiver; And a CPU that reads a password and controls an operation for call formation.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen in the figure further includes a remote transmitter and receiver 100 for transmitting and receiving voice signals and data signals in a narrow space through the low-frequency wireless channel of the general cellular phone described above.

The multihand set 200A to 200N includes a remote transceiver 210A to 210N, a CPU 220A to 220N, a keypad unit 230A to 230N, an audio processing unit 240A to 240N, a display unit 250A to 250N, and a song. A receiver is provided, and the remote transceiver 210A to 210N transmits and receives a data signal and a call voice signal through a wireless channel with the remote transmitter and receiver 100 of the cellular phone. At this time, it uses a weak radio wave to minimize harmful electromagnetic radiation of human body, and does not affect surrounding communication devices, and operates in a multi-channel access method to prevent cross talks among multiple people using different handsets. The CPUs 220A to 220N select a channel not used in another handset among multiple channels to compare and analyze a unique number and a password in a data signal transmitted and received during a call through the handset, and to prevent crosstalk. Control the overall behavior of the process. Keypad sections 230A-230N generate an overall key signal for use of handsets 200A-200N via cellular phones. The voice processing units 240A to 240N modulate and demodulate the voice signals transmitted and received through the remote transmission and reception units 210A to 210N according to the control signals of the CPUs 220A to 220N. The display units 250A to 250N display the overall operation according to the use, such as the operating state and the alarm state of the cellular phone.

Referring to the operation of the present invention having a function as described above are as follows.

If the user of the first handset 200A tries to connect the cellular phone with the wireless channel by inputting a unique number and a password through a predetermined key of the keypad 230A to make a call through the relay of the cellular phone, the CPU 220A A predetermined channel occupancy request signal is output to the remote transceiver 210A side in accordance with the applied key signal. At this time, the remote transceiver 210A accesses the entire channel according to the applied channel occupancy request signal, selects a callable channel that is not used by another handset, connects to the cellular phone, and displays the state through the CPU 220A. It is displayed on the display part 250A side. Then, when the user drives the transmission key inputting the other party's telephone number to which the user wants to make a call connection through the keypad unit 230A, the CPU 220A stacks the other party's telephone number to be applied and then remotely transmits / receives the signal 210A according to the transmission key signal. When the cellular phone is connected to the transmission / reception unit 100 through), the remote transmission / reception unit 100 of the cellular phone converts the applied signal into a signal for high-frequency transmission, and then applies it to the transmission unit through a central processing unit for transmission means. Connect the call through.

At this time, the voice signal received at the high frequency from the cell site is converted into a low frequency voice signal by the central processing unit of the cellular phone and then the remote transceiver 210A of the first handset 200A through the remote transceiver 100. Received via a low-frequency radio channel assigned to. When the remote transceiver 210A of the first handset 200A applies the received voice signal to the voice processor 240A according to the control signal of the CPU 220A, the voice processor 240A receives the control signal of the CPU 220A. After demodulating to analog signal, output through speaker (SPK) to user.

In addition, the user's transmission analog voice signal input to the microphone (MIC) is modulated into a digital signal through the voice processing unit 240A and then the remote transceiver 100 of the cellular phone to the wireless channel assigned through the remote transceiver 210A When transmitting to the mobile phone remote transmission and reception unit 100 converts the low frequency voice signal received from the first handset 200A to a high frequency through the central processing means and transmits to the cell site through the transmission means.

In addition, when the incoming signal is applied from the cell site side, the central processing unit of the cellular phone analyzes the applied data signal, analyzes the unique number and secret number of the handset 200A to 200N to be called, and then the remote transceiver unit ( Data received through 100 is analyzed to detect whether the corresponding handset 200A-200N is in use. If the handset 200A to 200N that the called party wants to talk to is in use, the cellular phone sends a signal indicating that the handset 200A to 200N to which the call is requested is in use and cannot be connected. Detect set request 200A ~ 200N and call request, and if the other party who applied the incoming signal is able to connect with handset 200A ~ 200N that wants to talk, convert the received data to low frequency and access the talkable channel. Send to the handset 200A to 200N side. The user of the handsets 200A to 200N drives a predetermined key of the capping unit 230A in response to the ringing tone to form a communication path.

As described above, the present invention converts the high-frequency signals transmitted and received through the cellular phone into a weak radio wave that does not cause electromagnetic damage to the human body, thereby making a call with a small, light weighted multiple handsets through a wireless channel. And reliability is provided, and it is efficient to use by using multiple handsets assigned unique numbers and passwords in a small space office, and by using multiple access wireless channels, it serves as a simple wireless switching system. Provide security.

In addition, the cellular phone is placed in the area where the attenuation of the radio wave is small in the shaded area of the radio wave, and the quality of the call is improved by maintaining a good communication sensitivity through the call through the handset.

Claims (2)

In a multi-phone handset apparatus of a cellular phone having a cell phone and a plurality of handsets, the cell phone includes a first remote transceiver which processes high frequency radio signals transmitted and received with a cell site and communicates with low frequency radio signals. To; The multi-handset includes a first remote transceiver and a second remote transceiver for transmitting and receiving data signals and voice signals using a low frequency by a radio channel, a keypad unit for supplying a key signal for a call, and the cellular phone. A display unit displaying an overall usage state of the voice signal, a voice processor for processing and demodulating the voice signal transmitted and received through the second remote transceiver, and analyzing a data signal applied through the keypad unit or the second remote transceiver; And a CPU that reads a password and controls an operation for call formation. The cellular phone according to claim 1, wherein the first remote transceiver and the multi-handset of the cellular phone use a multi-channel access scheme to prevent interference with occupied channels of other handsets. Multi handset.