KR20000054231A - Telephone using Internet and communication method - Google Patents

Abstract

PURPOSE: A method for performing communication of a telephone based on the internet is provided to call without using a sound card of a computer and to easily connect the telephone with the computer using a universal serial bus(USB), by using a jack of the telephone without connecting a speaker and a headset to a back side of the computer, and by replacing functions of the sound card. CONSTITUTION: A method for performing communication of a telephone based on the internet comprises the steps of: if data is not transmitted, setting up the data as a stand-by mode; if an identify replay(IRP) is received, generating a pipeline between a computer and the telephone to transmit the data; and deciding whether an error is generated to adjust a size of a packet.

Description

Internet-based phone and communication method {Telephone using Internet and communication method}

The present invention relates to an Internet-based telephone and a communication method having an Internet phone and a general telephone function. The present invention relates to an Internet-based telephone and a communication method that can be conveniently connected to a computer using a USB device and more conveniently use the Internet phone and a regular phone. It is about.

Internet phone is a field that attracts a lot of attention around the world because it can make voice calls for free. It can be divided into two types: hardware based internet phone and PC based software internet phone.

Hardware-based Internet phones are expensive due to the combination of hardware and network devices that can implement Internet phones in the phone.

In the case of PC-based software internet phones, various free software services such as PC-to-PC and PC-to-phone (Dial-pad, Wowcall, and other VoIP) have been provided. It is a trend.

In the case of PC-based software internet phones, a full duplex sound card must be installed in the PC for use, and a headset is required, which brings considerable economic burden and inconvenience in using such as price and sound card installation and headset connection.

In addition, the biggest problem is that in using a PC-based software Internet phone, the transmission uses a PC-based software Internet phone, and reception and some transmissions require the use of a regular phone.

Accordingly, the present invention has been made in view of the above problems, and provides a method for PC users to install the device more conveniently using a universal serial bus (USB).

By using USB isochronous transfers, you can use an internet phone without a full duplex sound card in the computer body, and also use a PC peripheral and communication method that can be used as a regular phone. to provide.

In addition, in using a PC-based Internet phone program such as a dial pad, a program for automatically accessing a site and logging in without a browser is provided.

1 is a schematic system configuration diagram of a multifunctional telephone according to an embodiment of the present invention.

Figure 2 is a detailed system configuration of the multifunction telephone according to an embodiment of the present invention.

Figure 3 is a flow chart for explaining the flow of data transmission of the multifunction telephone according to an embodiment of the present invention.

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

110a, 110b: public switched telephone network 112: telephone

114: Computer 116: Internet Network

201: USB Software 203: Speaker Driver

205: microphone driver 207: speaker pipe

209: microphone pipe 211: speaker

213: Hardware for USB Communication

215: microphone

In order to achieve the above object, according to an embodiment according to an aspect of the present invention,

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

1 shows a schematic system diagram of a multifunctional telephone according to an embodiment of the present invention.

The public telephone switching network 110a is connected to the telephone, so that the public telephone can be used through the public telephone switching network 110a, and also to the public telephone switching network 110b through the computer 114 using the Internet network 116. Since it is connected to the public switched telephone network (110b) through the Internet network 116 using a PC-based Internet phone software, so that you can use a regular phone, mobile phone, etc., through the Internet network 116 and voice chat The same PC-to_PC call can be used.

In the present invention, the speaker portion may replace the audio function of the sound card.

The bridge diode serves to rectify the incoming signal from the public switched telephone network, and the switch unit is operated by a hook switch and connects the speech network to the public switched telephone network. The speech network amplifies and transmits the Tx and Rx signals. The microphone and speaker serve as input / output terminals of the handset or headset.

The keypad and dialer provide the function of dialing in the same way as a conventional telephone. The part is responsible for the general telephone function.

The USB module is responsible for setting up, maintaining, and managing USB cable connections when it receives an interrupt from the computer. The A / D converter converts the analog signal from the microphone into a digital signal for USB transmission, and the D / A converter converts the digital signal from the USB cable into an analog signal and sends it to the speaker.

The control unit performs the overall control role of the system of the present invention, and the memory unit is a space for storing the control program and data.

This is the part for using a PC-based Internet phone using USB communication.

2 is a detailed system configuration of the multi-function phone according to an embodiment of the present invention.

The speaker pipe 207 supporting the Rx connecting the speaker driver 203 and the speaker stage and the microphone pipe 209 supporting the Tx connecting the microphone driver 205 and the microphone stage are respectively set for data transmission. Done.

The creation, termination, and management of pipes for which actual data transmission takes place is undertaken by the USB module and control unit of the telephone and the client program and driver of the host (computer).

In the case of telephone applications, it is necessary to use the isochronous transmission method, which is one of the USB standard methods, because voice data must be transmitted in real time without transmission delay. The characteristic of the isochronous transmission method is used in a method that emphasizes real-time, and does not retransmit for error correction to ensure real-time.

Data packet is composed of Packet ID (PID), data, and CRC. In case of isochronous transmission method, even if an error occurs, error cannot be corrected through retransmission, so the receiving side detects the error through CRC after receiving the data. If possible, adjust the size of the data packet to reduce the error.

Since the data received from the hardware part for USB communication of the phone through the pipe is in digital form, it is converted into analog form and sent to the speaker terminal. Likewise, the analog data input from the micro device is used for USB communication of the phone for USB communication. Is converted to digital form.

Figure 3 shows a flow chart for explaining the flow of data transmission of the multifunction telephone according to an embodiment of the present invention.

If there is no data transfer, the USB phone is in standby mode. When an I / O Request Packet (IRP) occurs, computer software and telephones form pipes and transmit data.

In case of isochronous data transmission method, there is no method to correct error and it is sensitive to delay. Therefore, if error occurs after checking error of transmitted data using CRC, the receiver receives the fact that an error occurred. Inform the user of the error occurrence by changing the size of the data packet.

According to the present invention made as described above, it is possible to make a phone call even if the computer is not provided with a sound card, and by replacing the function of the sound card, it is easier and easier to use the jack of the phone without the inconvenience of connecting the speaker and the headset behind the computer. It can be connected conveniently.

Claims (3)

If there is no data transmission, setting the data to the standby mode; If IRP reception occurs, create a pipe between the computer and the phone and transfer the data Communication method of the Internet-based telephone comprising a. The method of claim 1, Adjusting the size of the data packet by determining whether there is an error Communication method of the Internet-based telephone further comprising. A telephone that is connected to a computer using a USB cable and can use both a regular telephone and a telephone through the computer; A computer connected to the telephone and connected to a public switched telephone network using an internet network to control voice data in response to a request for transmission and reception by a user Internet-based telephone comprising a.