KR100351429B1 - An apparatus for detecting and storing of voice packet in internet telephony - Google Patents

Abstract

The present invention configures an Internet phone system on a public network of Ethernet 10/100 Mbps to detect and detect specific packets on a network for preservation and post-verification of voice and video calls in places where voice and video calls are made. A storage system includes an embedded packet detection device for detecting and analyzing network packets, a central processing unit for classifying and storing detected packets, and a storage device for actually storing data.

Description

{An apparatus for detecting and storing of voice packet in internet telephony}

The present invention relates to a system for detecting and storing an internet phone voice packet. More particularly, the present invention relates to a system for detecting and storing internet phone voice packets. It relates to a system that performs a function.

In recent office environments, local area networks (LANs) are more important than public switched telephone networks (PSTNs). LANs and telephone networks are usually composed of independent networks. Therefore, it is required to double the cost of maintaining it. In some cases, this inconvenience is solved by replacing the telephone network with the LAN by a terminal (hereinafter referred to as an Internet phone) capable of operating in the LAN. Recently, with the expansion of data network due to the development of high-speed computer network, the connection with LAN is easily made through TCP / IP-based network, that is, the Internet. Accordingly, voice communication, which is mainly performed through a telephone network, is also performed through an IP (Internet Protocol) network, and an Internet phone service is a representative example.

The Internet phone service transmits voice over a TCP / IP-based network, that is, the Internet, and is much cheaper than using a telephone network, and a protocol set differently for each region and country (ring signal cycle, Depending on the communication method between the exchanges, etc., calls can be made without developing other exchanges, and the network maintenance cost can be cut in half compared to the past, since there is no need to maintain a separate telephone network for voice communication.

In particular, in the existing TCP / IP application services, additional services that can reach the general public are exploding. The general public accesses the Internet through a modem or a dedicated network. Accordingly, a technology for using a telephone over the Internet as well as a web service using a telephone has been developed, which is called an Internet Telephony or a Voice on the Net.

To understand Internet telephony, you need to be able to understand your telephone network, the PSTN. A PSTN is a circuit switched network that provides real-time or synchronized voice communications to guarantee quality of service (QoS). When a call is initiated, a line is established between the calling party and the called party. The PTSN allocates 64 Kbps bidirectional circuits between the two sides to guarantee QoS. It will allocate 64 Kbps until the call ends, whether or not the other party is talking. Because the bandwidth is constant, the phone charge is proportional to distance and time. On the other hand, the Internet is a switching network of packets that can communicate with various QoS such as e-mail or file transfer. Packet-switched networks do not guarantee QoS because they do not fix the path between the sender and the receiver. As a result, internet usage is proportional to bandwidth, not distance and time.

Although the Internet does not guarantee QoS, Internet telephony is a general trend. In other words, Internet phone users will try to use long distance voice communication while accepting some degradation. Internet phone users can now make international calls for local calls. An internet telephony gateway is a device that supports communication with a general telephone user connected to a PSTN. The Internet telephony gateway receives the voice from the PSTN and delivers it to the Internet. On the contrary, it receives the packet from the Internet, converts it to voice, and transmits it to the PTSN. The gateway is connected to the local network for the sender and the receiver, thus minimizing the value of using the PSTN. As a result, the Internet telephony gateway can provide telephone-telephone, telephone-computer, computer-computer communication.

Internet telephones are generally classified into computer-computer, computer-phone and telephone-phone systems. In addition, telephone-computer and web-phone systems are possible. To explain the typical case of the Internet phone, first of all, the computer-computer method, such as VocalTec's Internet Phone, requires that both users connect to a specific server computer and the server computer Provide a directory service that displays a list. At this time, the user selects a call. This method requires a modem (or LAN card), sound card, microphone and speakers in the computer. At the same time, users must be connected via the Internet.

Next, there is a computer-telephone method, in which a computer user connects to a server providing Internet telephone service after running the Internet telephone software. Enter the phone number when the signal is lost from the server. Of course, the user must be assigned an account and password after paying a predetermined telephone card fee from a service provider in advance. Calls are packetized and arrive at the server over the Internet. The call arrives on a server closest to the other party on the Internet. The call is changed back from the server to the regular phone number and forwarded to the other party through the telephone network. The voice sent from the computer is packetized, passed through the Internet, and reproduced as a voice signal when it goes back to the final telephone network. The fee for use is the fee for using the Internet and the telephone network.

The Internet has a problem in that call quality is deteriorated because the real-time service is not guaranteed due to various characteristics such as transmitting data in packets. Therefore, in the case of transmitting voice data through the Internet network, to reduce the packet size by using a codec to compress the voice in order to provide a real-time service while maintaining the characteristics of the voice data to some extent, a technique of transmitting the voice data should be used.

1 shows a connection state of a general Internet phone, and shows data packets between a first and a second computer (1) (2) having a microphone and a speaker, and the first and second computers (1) (2). It consists of a packet network 3 such as a LAN to be transmitted and the Internet. A user who wants to be provided with a service through a packet network such as a LAN or the Internet executes an application for using an Internet phone on the first computer 1 and then makes a call to the other party's IP address. The first computer 1 then converts the telephone request signal of the other party's IP address according to the IP protocol and transmits the corresponding data packet to the packet network 3. Accordingly, the second computer 2 receives and retrieves a data packet through the packet network 3 and informs the user that a call has been made according to the telephone request signal. By doing so, communication between the first and second users using the first and second computers 2 connected to the packet network 3 is performed.

On the other hand, the IP protocol (IP protocol) is provided with the International Telecommunication Union (ITU-T) H.323 as a protocol for voice communication in the IP network, the Q.931 protocol is a protocol for establishing a connection in the H.323 Q.931 is a protocol developed for the Integrated Services Digital Network (ISDN), and these protocols can handle voice processing as well as call processing in the IP terminal itself. Accordingly, based on the protocol (H.323, Q.931) and the Multimedia Internet Protocol System (MIPS) protocol developed for multimedia communication over the Internet, a system capable of delivering voice packets to an IP network (IP terminal, PSTN) With the development of gateways, direct calls can be made directly to IP terminals (terminals) in internal networks that do not go through routers. Communication is also possible.

Here, the PSTN gateway is a device for converting an IP protocol into a PSTN protocol or converting a PSTN protocol into an IP protocol at an end of an IP network, and serves to interconnect a telephone network (PSTN) and an IP network.

In the future, it is expected that existing PSTN-oriented call centers will gradually be replaced by Internet-oriented call centers.

An object of the present invention is to provide a system capable of detecting and storing voice packet data of an Internet phone system.

Another object of the present invention is to provide a system capable of monitoring voice data using an Internet phone.

It is still another object of the present invention to provide a system for easily retrieving call history using an Internet phone by making a database of voice packet relations and logging information.

The feature of the Internet phone voice packet detection and storage system according to the present invention for achieving these objects is installed at the connection point of the internal local area network (LAN) and the external remote network of the public network to detect the Internet phone call information of the network packet A system for storing handset information and actual call content in a database and file unit, comprising: an embedded packet detection device for detecting and analyzing a network packet, and a classification of packets detected by the detection device And a central processing unit (CPU) for outputting a control signal for storage, and a storage device in which data is actually stored by the control signal of the central processing unit.

1 is an exemplary view showing a connection state of a general Internet phone,

2 is an exemplary diagram of an Internet phone configuration to which a voice packet storage and retrieval system according to the present invention is applied.

Hereinafter, a configuration and operation of a voice packet detection and storage system of an Internet phone according to the present invention will be described with reference to the accompanying drawings.

2 is an exemplary view showing the configuration of an Internet phone system to which the voice packet detection and storage system according to the present invention is applied. Packets from Internet phones are delivered from the user's PC connected to the Ethernet via a hub and a router through a remote network, and the other party also passes through the opposite path. At this time, it can be seen that the voice packet detection and storage system 100 according to the present invention is installed at the connection point between the remote network and the internal local area network.

As shown, the voice packet detection and storage system 100 according to the present invention includes an embedded packet detection device 110 for detecting and analyzing a network packet, and the detection device 110. A central processing unit 120 for outputting a control signal for classifying and storing a packet detected by the same; and a storage device for actually storing data by the control signal of the central processing unit 120 (130, 140) is made.

The detector 110 detects a double voice packet by analyzing all packets entering and exiting the internal local area network. In addition, the detected packets are rearranged in time, each packet header information is extracted as separate data, and then the CPU 120 is informed of this. The central processing unit 120 outputs a calculation and control signal for effectively storing the information extracted by the detection unit 110. At this time, the data stored in the storage device is the packet header information analyzed by the central processing unit 120, the indexing information such as the start, end, caller's computer address and voice packet data.

In other words, Internet phone call information is detected in a network packet, and information that can be used as a post-search object such as handset information and actual call content is indexed by a series of conditions and stored in a database and file unit. The storage device used as a storage medium of the information is divided into a primary storage device 130 and a secondary storage device 140, the primary storage device is a general storage device is a hard disk (hard disk) The secondary storage device 140 may be a tape backup device or a DVD-RAM device as a device for back-up.

As described above, transparent e-commerce can be implemented through monitoring of voice packets by using the voice packet storage and retrieval system according to the present invention. The call history can be easily retrieved.

Claims (1)

A system installed at an access point between an internal local area network (LAN) of a public network and an external remote network to detect Internet phone call information in a network packet and store handset information and actual call contents in database and file units; An embedded packet detection device for detecting and analyzing a network packet, A central processing unit (CPU) for outputting a real-time control signal for classifying and storing the packets detected by the detection device into handset information and actual call contents; Voice packet detection and storage system of the Internet phone, characterized in that it comprises a storage device (Storage) is actually stored by the control signal of the central processing unit.