KR100435391B1 - Internet cordless phone apparatus - Google Patents

Abstract

PURPOSE: An Internet radio telephone device is provided to use an inexpensive an Internet telephone by connecting a Bluetooth interface module and a radio handset with the existing PC. CONSTITUTION: An Internet radio telephone device is formed of a PC(100), a Bluetooth interface module(110), and a radio handset(120). The PC(100) is connected with the Internet for executing an Internet telephone function, and is connected with the Bluetooth interface module(110) by a USB(Universal Serial Bus) port. The Bluetooth interface module(110) is connected with the radio handset(120) by a Bluetooth wireless link, and is connected with the PC(100) by the USB port to relay voice data between the radio handset(120) and the PC(100). The radio handset(120) is in the charge of voice codec processing and user interface processing, and is connected with the Bluetooth interface module(110) by the Bluetooth wireless link for exchanging voice data.

Description

Internet cordless phone apparatus

The present invention relates to a PC (PC) based Internet wireless telephone device using a Bluetooth interface module and a wireless handset.

Internet telephones according to the prior art for making calls using the Internet are as follows, each of which has the following problems.

The first is a form in which the handset and the body are connected by wire similarly to a general telephone. In this prior art, it is inconvenient to use the user close to the body because it is difficult to move the handset.

Secondly, the handset and the PC are connected by a USB port, and the PC is connected to the Internet to perform the Internet telephony protocol function. Similarly, since the connection is made by wire, the user has to use the PC in close proximity.

Thirdly, the wireless handset and the body are connected by a wireless link like a normal cordless phone, and the body is connected to the Internet to perform the Internet telephony protocol function. This is expensive.

In view of these problems of the prior arts, the present invention provides an inexpensive and convenient Internet wireless telephone apparatus.

1 is an overall configuration diagram of an Internet radio telephone apparatus of the present invention.

2 is a block diagram of a Bluetooth interface module of the present invention.

3 is a detailed block diagram of a Bluetooth interface module of the present invention.

4 is a software structural diagram mounted on a ROM of a communication processing and module control unit.

5 is a block diagram of a wireless handset of the present invention.

6 is a detailed block diagram of a wireless handset of the present invention.

7 is a software structure diagram mounted on the ROM of the communication processing and handset control unit.

8 shows an example of an outgoing call connection process for making an Internet phone call using a wireless handset.

9 is a diagram illustrating an example of an incoming call connection process for receiving an Internet phone from an external device using a wireless handset.

10 shows an example of a call release procedure when ending a call.

The present invention for achieving the above object is composed of a PC, a Bluetooth interface module, a wireless handset, the PC is connected to the Internet to handle Internet telephony functions and the Bluetooth interface module is connected to the USB port, the Bluetooth interface module is wireless The handset is connected by Bluetooth wireless link and the PC is connected by USB port to relay voice data between the wireless handset and PC.The wireless handset is responsible for voice codec processing and user interface processing, and the Bluetooth interface module is connected by Bluetooth wireless link. Voice data is exchanged.

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

1 is an overall configuration diagram of an Internet radio telephone apparatus of the present invention.

The Internet wireless telephone apparatus of the present invention is composed of a PC 100, a Bluetooth interface module 110, and a wireless handset 120.

The PC 100 is a conventional PC that can be connected to the Internet for data communication, can exchange data through a USB port, and has a program processing function so that the Internet telephony function can be processed as a program.

The Bluetooth interface module 110 is a fixed device, and includes a communication processing and module control unit 210, a memory unit 220, a real time clock (RTC) unit 230, a Bluetooth RF transceiver unit 240, And a USB connection unit 250. In addition, a Bluetooth wireless link is used to exchange call setup and release, voice coded data, and user interface information with a wireless handset, and is connected to a PC using a USB port to enable data relay between the wireless handset and the PC.

The wireless handset 120 includes a communication processing and handset control unit 310, a user input unit 320, a screen display unit 330, a memory unit 340, a voice processing unit 350, and a Bluetooth RF transceiver unit 360. It consists of. It performs a voice codec function and a user interface function, and establishes and releases calls, transmits and receives voice coded data, and transmits and receives user interface information using the Bluetooth interface module 110 and the Bluetooth wireless link. Therefore, it is possible to make a voice call wirelessly like a normal cordless telephone.

2 is a block diagram of a Bluetooth interface module of the present invention.

The Bluetooth interface module includes a communication processing and module control unit 210, a memory unit 220, a real time clock (RTC) unit 230, a Bluetooth RF transceiver unit 240, and a USB connection unit 250.

The communication processing and module control unit 210 is composed of a high speed processing processor module, a Bluetooth RF transceiver interface module, a Bluetooth baseband processing module, a memory control module, and a general-purpose input / output unit operated by a program, and wireless data with a wireless handset. It performs communication processing function for exchange and communication processing function for data exchange with PC.

Communication processing for wireless data exchange with a wireless handset is implemented using an asynchronous connection less (ACL) link among known Bluetooth standards.

The Bluetooth system defines two types of links: SCO (Synchronous Connection Oriented) and Asynchronous Connection Less (ACL) to support multimedia applications that mix voice and data. Synchronous-connected (SCO) links are usually symmetrical and circuit switched for voice and support point-to-point communications. These links have two consecutive slots (forward and return slots) at regular intervals.

Asynchronous link (ACL) links are either symmetrical or asymmetrical, packet switched, and support point to multipoint communications for bursty data transmission. The master device uses a polling scheme to control Asynchronous Communication. It also exchanges call setup and release messages, voice coded data, and user interface information through an asynchronous link (ACL) link with a wireless handset corresponding to a slave.

In addition, the communication processing and module control unit 210 periodically transmits the date and time information provided by the real time clock (RTC) unit 230 to the wireless handset.

The memory unit 220 includes a flash memory for storing a program to be executed by the communication processing and module control unit 210 or data for long-term storage, and a RAM for storing temporary data.

The real time clock (RTC) unit 230 generates a date and time information and transmits it to the communication processing and module control unit 210 or sets a new date and time information according to a command of the communication processing and module control unit 210. Perform. The date and time information is periodically transmitted to the wireless handset by the communication processing and module controller 210, and the user can reset the date and time information directly through the wireless handset.

The Bluetooth RF transceiver unit 240 transmits a signal output through the Bluetooth RF transceiver interface of the communication processing and module control unit 210 to the wireless handset and transmits a signal received from the wireless handset to the communication processing and module control unit 210. Perform the function of passing.

The USB connection unit 250 performs a data exchange function with a PC using a USB port.

3 is a detailed block diagram of a Bluetooth interface module.

The central processing unit 310 is a 32-bit risk (RISC) processor and has a function of processing a digital signal processing (DSP) instruction. The communication processing and module control unit 210 has 128 Kbytes of internal memory (SRAM, CACHE) 320 and an external memory interface unit 330, so that the flash ROM (340) and the SRAM (SRAM) ( 350 is connected.

The communication processing and module control unit 210 includes various registers, interrupt and timer controllers 360, and a 32 bit GPIO (General Purpose Input Output) unit 370.

The Bluetooth bit controller 380 creates a packet through forward error correction (FEC), header error control (CEC), cyclic redundancy check (CRC), and encryption during data transmission. It is connected to the Bluetooth RF transceiver unit 385 through an RF transceiver interface. Data reception is performed through the reverse process after connecting to the Bluetooth RF transceiver unit 385 through the RF transceiver interface (RF transceiver Interface). The Bluetooth power controller 382 is driven by a phase lock loop (PLL) for controlling transmit and receive power and generating an internal high speed clock.

The communication processing and module control unit 210 is connected to the USB connection unit 250 and is connected to the PC through the USB connection unit.

The LED 390 is connected to the GPIO 370 and controlled by the CPU 310 to display the connection status of the Bluetooth link.

4 is a software structural diagram mounted on a ROM of the communication processing and module control unit.

Bluetooth features include Generic Access Profile (GAP) 410, Service Discovery Profile (SDP) 411, Cordless Telephony Profile (CTP) 412 and Telephony Control Protocol Specification (TCS) 413, Link Management Protocol (LMP). 414, the baseband (BB) / link manage (LM) 415.

The GAP 410 supports the function of generating and releasing a Bluetooth wireless link and a power save mode (PARK), and the SDP 411 checks the service type of a device existing in the Bluetooth network to provide only a cordless telephony service. Has the function to support The CTP 412 satisfies the protocol regarding the operation of the TCS 413 as a profile for providing a cordless telephony service.

The call control message through the TCS 413 is transmitted through the L2CAP 416, which is a link control protocol for the order control and the error recovery function, and the voice packet is also transmitted through the L2CAP 416.

Transcoder 420 is responsible for converting the compression format of the voice data as needed.

The GPIO driver 440 is responsible for controlling the LED, and the USB driver 441 is responsible for the USB connection function.

5 is a block diagram of a wireless handset of the present invention.

The wireless handset includes a communication processing and handset control unit 510, a user input unit 520, a screen display unit 530, a memory unit 540, a voice processing unit 550, and a Bluetooth RF transceiver unit 560.

The communication processing and handset control unit 510 includes a high speed processing processor module, a Bluetooth RF transceiver interface module, a Bluetooth baseband processing module, a memory control module, and a general-purpose input / output unit operating by a program.

In addition, a keypad signal input from the user input unit 520 is processed, text information to be output through the screen display unit 530 is generated, and a voice codec function for compressing and restoring voice data is performed. ), Exchanges voice data, generates various sound data to be output from the voice processor 550, and transmits the voice data to the voice processor 550, and performs a communication processing function for exchanging wireless data with a Bluetooth interface module.

The voice codec function for compressing and decompressing voice data is implemented using G.723.1 or G.729, which are well-known international standards. Communication processing for wireless data exchange with a Bluetooth interface module is implemented using an asynchronous connectionless (ACL) link among known Bluetooth standards. It exchanges call setup and release messages, voice coded data and user interface information through an asynchronous link (ACL) link with a Bluetooth interface module corresponding to a master. In addition, the date and time information is periodically received from the Bluetooth interface module.

The user input unit 520 includes a keypad and a driving element, and when a user presses the keypad, the user input unit 520 transmits a corresponding signal to the communication processing and handset control unit 510 through a general-purpose input / output unit of the communication processing and handset control unit 510. . The keypad includes number buttons, call buttons and other menu selection buttons.

The screen display unit 530 is composed of an LCD for displaying text and a driving element. The screen display unit 530 includes a phone number, a caller ID, a phone book information, date and time information, and a function selected by a user. Performs a display function such as processing status.

The memory unit 540 includes a flash memory for storing data that needs to be stored for a long time, such as a program or a phone book to be executed by the communication processing and handset controller 510, and a RAM for storing temporary data.

The voice processing unit 550 converts the digital voice data and the various sound data transmitted from the communication processing and the handset control unit 510 into analog signals and outputs them through a speaker, and converts the analog voice signals received from the microphone into digital data. To perform the communication processing and transfer to the handset control unit 510.

The Bluetooth RF transceiver unit 560 transmits a signal output through the Bluetooth RF transceiver interface of the communication processing and handset control unit 510 to the Bluetooth interface module wirelessly and receives a signal received from the Bluetooth RF transceiver unit of the Bluetooth interface module. Performs a function of communication processing and transfer to the handset control unit 510.

6 is a detailed block diagram of a wireless handset of the present invention.

The central processing unit (CPU) 610 is a 32-bit risk (RISC) processor and has a function of processing digital signal processing (DSP) instructions. The communication processing and handset control unit 510 has an internal memory (SRAM, CACHE) 611 of 128 Kbytes, and has an external memory interface 612 so that a flash ROM (620) and an SRAM (SRAM) ( 630 is connected.

The communication processing and handset control unit 510 includes various registers, an interrupt and a timer controller 613, and a 32 bit GPIO (General Purpose Input Output) unit 614.

The Bluetooth bit controller 615 creates a packet through forward error correction (FEC), header error control (CEC), cyclic redundancy check (CRC), and encryption during data transmission. It is connected to the Bluetooth RF transceiver unit 640 through the RF transceiver I / F. Data reception is performed through the reverse process after connecting to the Bluetooth RF transceiver unit 640 through an RF transceiver interface (RF transceiver I / F).

Bluetooth's power controller 616 is driven by a PLL for controlling transmit and receive power and generating an internal high speed clock.

In addition, it performs PCM codec processing function using digital signal processing (DSP) function and is connected to an external analog device (A / D converter, D / A converter) 650 through PCM codec IF unit 617, The speaker will be driven. The digital signal processing (DSP) function is used to encode the voice signal input from the microphone into G.723.1 or G.729 voice data, and decode the received G.723.1 or G.729 voice data to output to the speaker.

The user interface keypad 660 and LCD 670 are connected to the GPIO unit 614 and are responsible for key input and output of information. The keypad checks the state of the input key to the GPIO unit 614 every 10 msec, and determines that the correct key is pressed when the same key is pressed three or more times. The LCD 670 in charge of displaying user information is connected to the GPIO unit 614 and controlled by the CPU 610.

7 is a software structural diagram mounted on the ROM of the communication processing and handset control unit.

The Bluetooth features include Generic Access Profile (GAP) 710, Service Discovery Profile (SDP) 711, Cordless Telephony Profile (CTP) 712 and Telephony Control Protocol Specification (TCS) 713, Link Management Protocol (LMP). 714, BB (Baseband) / LM (Link Manage) (715).

The GAP 710 supports the function of creating and releasing a Bluetooth wireless link and a power save mode (PARK), and the SDP 711 checks the service type of a device existing in the Bluetooth network so that only a cordless telephony service is available. Has the function to provide. The CTP 712 satisfies the protocol regarding the operation of the TCS 713 as a profile for providing a cordless telephony service.

The TCS 713 establishes and releases calls and transmits and receives G.723.1 or G.729 voice packets. The call control message through the TCS 713 is transmitted through the L2CAP 716, which is a link control protocol for order control and error recovery, and the packets of the G.723.1 or G.729 voice codec 722 are also L2CAP (716). Send and receive via The GPIO driver 720 is responsible for controlling the keypad and the LCD, and the PCM driver 721 is responsible for providing voice data to the G.723.1 or G.729 voice encoder and outputting decoded PCM data to the speaker. do.

The system control software 730 performs system management functions such as Bluetooth profile, protocol, user information, password management, and user selection function.

8 is a diagram illustrating an example of an outgoing call connection process for making an Internet phone call using a wireless handset.

When the user presses the other party's phone number using the wireless handset, a setup message is transmitted to the Bluetooth interface module (810). Upon receiving the setup message, the Bluetooth interface module transmits a connection request message to the PC (820), and the PC, which has received the connection request message, transmits a dialup request message to the other party to call through the Internet network (821). The wireless handset that has sent the dial-up request message receives a call progress message from the Bluetooth interface module (830). When receiving the call message from the other party (839), and transmits the call progress message to the Bluetooth interface module (840), and receives the Bluetooth interface module transmits a call (ALERT) message to the wireless handset (850). In addition, when the PC receives a dial-up completion message from the other party (859), it transmits a connection completion message to the Bluetooth interface module (860), and the Bluetooth interface module receiving the connection completion message transmits a connection message to the wireless handset (870). ). When the wireless handset receives the connection message, a CONNECT ACKNOWLEDGE message is transmitted to the Bluetooth interface module (880), and the Bluetooth interface module receiving the connection response message transmits a connection completion message to the PC to prepare for the call (881). ). Thereafter, the voice data is exchanged, thereby making a voice call (890).

All messages used in the outgoing call connection process between the Bluetooth interface module and the wireless handset are exchanged through an asynchronous link (ACL) link.

The communication between the PC and the counterpart phone is made according to an Internet telephony protocol of known H.323 or Session Initiation Protocol (SIP).

9 is a diagram illustrating an example of an incoming call connection process for receiving an Internet phone from an external device through a wireless handset.

Receiving a dial-up request message from the called party by the PC; Upon receiving a dial-up request message (909), the device transmits a connection request message to the Bluetooth interface module (910), and the Bluetooth interface module receiving the connection request message transmits a setup message to the wireless handset (920). The wireless handset receiving the setup message sends an alert message to the Bluetooth interface module (930), the Bluetooth interface module receiving the call message sends a call progress message to the PC (940), and receives a call progress message. One PC sends a busy message to the other party (941).

The wireless handset then sends a connection message to the Bluetooth interface module (950), the Bluetooth interface module receiving the connection message sends a connection complete message to the PC (960), and the PC receiving the connection complete message dials in to the other party. The completion message is transmitted (961). After the PC transmits the connection completion message to the other party, the device transmits a connection completion message to the Bluetooth interface module (962), and the wireless handset receives a CONNECT ACKNOWLEDGE message sent by the Bluetooth interface module receiving the connection completion message. Call preparation is made (970). Thereafter, voice data is exchanged to make a voice call (980).

All messages used in the incoming call connection process between the Bluetooth interface module and the wireless handset are exchanged through an asynchronous link (ACL) link.

The communication between the PC and the counterpart phone is made according to an Internet telephony protocol of known H.323 or Session Initiation Protocol (SIP).

10 is a diagram illustrating an example of a call release procedure when ending a call.

When the call is disconnected from the wireless handset while the voice call is in progress, a DISCONNECT message is transmitted to the Bluetooth interface module (1010), and the Bluetooth interface module receiving the disconnect message transmits a release request message to the PC (1020), and the release request is received. Upon receiving the message, the PC transmits a disconnect request message to the other party (1030). Subsequently, when the PC receives a disconnection completion message from the other party (1040), it transmits a release completion message to the Bluetooth interface module (1050), and the Bluetooth interface module receiving the release completion message sends a RELEASE message to the wireless handset. The wireless handset that has received a call release message (1060) and responds with a RELEASE COMPLETE message is released (1070).

All messages used in the call release process between the Bluetooth interface module and the wireless handset are exchanged through an asynchronous link (ACL) link.

The communication between the PC and the counterpart phone is made according to an Internet telephony protocol of a known H.323 method or Session Initiation Protocol (SIP) method.

Meanwhile, the above-described embodiments of the present invention can be written as a program that can be executed in a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium.

The computer-readable recording medium may include a magnetic storage medium (eg, ROM, floppy disk, hard disk, etc.), an optical reading medium (eg, CD-ROM, DVD, etc.) and a carrier wave (eg, Internet transmission). Storage media such as

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to this embodiment and various modified embodiments are possible without departing from the spirit of the present invention.

As described above, by providing a PC-based Internet wireless telephone apparatus using a Bluetooth interface module and a wireless handset, since the user can make Internet wireless telephone calls with the wireless handset, the user can freely move while making a call. It is possible to use a Bluetooth interface module and a wireless handset connected to a conventional PC has the advantage of cheaper than using an expensive standalone Internet phone.

Therefore, it can be usefully used as an economical and convenient Internet telephone means in hotels and offices with a PC.

Claims (10)

A Bluetooth interface device connected to a PC connected to the Internet and connected to a wireless handset via a Bluetooth wireless method to enable an Internet wireless telephone, A communication processing and module control unit for transmitting a voice packet received from the wireless handset to a PC and transmitting a voice packet received from the PC to the wireless handset; And an RF transceiver unit for transmitting a voice packet output from the communication processing and module control unit to the wireless handset and transmitting a voice packet from the wireless handset to the communication processing and module control unit. Bluetooth interface device. The Bluetooth interface device of claim 1, wherein the connection between the PC and the Bluetooth interface device is performed by a USB method. 2. The Bluetooth interface device of claim 1, wherein the wireless communication between the Bluetooth interface device and the wireless handset is performed through an Asynchronous Link (ACL) link as defined by the Bluetooth standard. In a wireless handset for an Internet wireless telephone device connected to a Bluetooth interface device connected to a PC connected to the Internet in a Bluetooth wireless manner, A communication processing and handset control unit for performing communication processing and user interface processing required for exchanging voice packets with the Bluetooth interface device; A voice processor converting the digital voice data transmitted from the communication process and the handset control unit into an analog signal and outputting the analog voice signal; And And an RF transceiver unit for transmitting a voice packet of the communication processing and handset control unit to the Bluetooth interface device and receiving a voice packet from the Bluetooth interface device and transmitting the voice packet to the communication processing and handset control unit. Wireless handset for the device. 5. The wireless handset of claim 4, wherein the wireless communication between the Bluetooth interface device and the wireless handset is performed via an Asynchronous Link (ACL) link as defined by the Bluetooth standard. The wireless handset of claim 4, further comprising a user input unit for transmitting a corresponding signal to the communication processing and handset control unit when the user presses the keypad. 7. The wireless handset of claim 6, further comprising a screen display for displaying the telephone number pressed by the user. A processing method of a Bluetooth interface device for an Internet wireless telephone device connected to a PC connected to the Internet and connected to a wireless handset via a Bluetooth wireless method to enable Internet wireless telephone, A communication process and module control step of transmitting a voice packet received from the wireless handset to a PC and transmitting a voice packet received from the PC to the wireless handset; And an RF transceiver step of transmitting the voice packet output in the communication processing and module control step to the wireless handset and transmitting the voice packet from the wireless handset to the communication processing and module control step. Method of processing a Bluetooth interface device for a device. In the method of processing a wireless handset for an Internet wireless telephone device connected to a Bluetooth interface device connected to a PC connected to the Internet in a Bluetooth wireless manner, A communication process and a handset control step of performing a communication process and a user interface process necessary for exchanging voice packets with the Bluetooth interface device; A voice processing step of converting the digital voice data transmitted in the communication processing and the handset control step into an analog signal and outputting it to a speaker, converting the voice signal from the microphone into digital voice data and transmitting the digital voice data to the communication processing and handset control step; And an RF transceiver step of transmitting the voice packet of the communication processing and the handset control step to the Bluetooth interface device, receiving the voice packet from the Bluetooth interface device, and transmitting the voice packet to the communication processing and the handset control step. Method of processing wireless handset for Internet wireless telephone device. 10. The method of claim 9, further comprising a user input step of transmitting a corresponding signal to the communication processing and handset control step when the user presses the keypad.