KR20050068273A - System and method for providing p2p based pda2pda, pda2tv, tv2tv video ip phone service over the system with internetworking the mobile communication network, the internet, and catv network - Google Patents

Abstract

The present invention relates to a method and system for providing a peer-to-peer based PDA2PDA, PDA2TV, TV2TV video IP phone service in a system interworking with a mobile communication network, an Internet network, a CATV network, and a system interworking with a mobile communication network, the Internet network, and a CATV network. From: Video IP phone client installed on a PDA with a wireless LAN card or CDMA modem, and a video IP phone client installed on a set-top box that provides two-way service connected to a PDA or interactive TV. Registering the IP address and port number to be used by the web client or each client, the IP Binder registers the caller IP list information to the client installed in the set-top box connected to the PDA and the interactive TV held by the transceiver. An IP Binding step; Establishing a PDA2PDA, PDA2TV, TV2TV video IP phone TCP / IP connection in a peer-to-peer manner; Transmitting and receiving A / V data to and from RTP / UDP / IP through an MPEG2 A / V codec to provide a video voice call between a sender and a receiver; And a TCP / IP disconnection step of terminating the end-to-end call of PDA2PDA, PDA2TV, TV2TV video IP phone. Therefore, PDA2PDA video IP phone video call is possible through peer-to-peer method in mobile communication network, and while watching existing A / V broadcasting signal on interactive TV connected to set-top box, PDA2TV, TV2TV video IP phone service is provided through data broadcasting channel. It can provide 1: 1 video call.

Description

System and Method for providing P2P based PDA2PDA, PDA2TV, TV2TV video IP phone service over the peer-to-peer based PDA2PDA, PDA2TV, TV2TV video IP phone service over the system interworking with mobile communication network, Internet network, CATV network system with internetworking the mobile communication network, the Internet, and CATV network}

The present invention relates to a system and method for providing a PDA2PDA, PDA2TV, TV2TV video IP phone service based on peer-to-peer (P2P: Peer to Peer) in a system interworking with a mobile communication network, an Internet network, a CATV network, and in particular, a CDMA modem or a wireless network. Peer-to-peer PDA2PDA Video IP Phone service is possible between PDA equipped with LAN card through IMT-2000 mobile communication network and 1: 1 video call is possible. By using an interactive TV connected to a set-top box (STB) that provides two-way service in an interlocked system, 1: 1 video call is made through interactive PDA2TV and TV2TV video IP phone service through data broadcasting channel in addition to the existing A / V broadcasting signal. The present invention relates to a peer-to-peer (P2P) based PDA2PDA, PDA2TV, and TV2TV video IP phone service providing system and method in a system interworking with a mobile communication network, an Internet network, and a CATV network.

Recently, with the development of web-based video conferencing technology, the video conferencing technology of 1: 1 or 1: N method has been researched and developed in mobile communication networks such as IMT-2000, and according to the scenario of convergence of broadcasting and communication, Interactive TVs connected to a set top box (STB) providing interactive TV services in conjunction with the Internet and CATV networks are emerging as information and communication contents of the future.

1A is a block diagram of a CTI based video conferencing system using a conventional H.323, FIG. 1B is a CTI based video conferencing system component using a conventional H.323, and FIG. 1C is a CTI based video transmission client using a conventional H.323. Display the screen.

FIG. 1A is a CTI-based videoconferencing system using a conventional H.323, and a videoconferencing system using H.323 in a conventional internet network uses a unique medium called the Internet for voice and video transmission. CTI (Computer Telephony) through huge internet network by using reliability and fixed bandwidth, which is an advantage of data transmission in public switched telephone network, as a medium for transmitting voice and various data processing capacity in computer Integration) system based video conferencing system.

It conforms to ITU-T's H.323 protocol stack, but provides video conferencing by incorporating the public telephone network called PSTN into the Internet, including video that was optional in the H.323 protocol stack. In contrast, by using separate transmission media to transmit voice and video data separately, it is a system that reduces the load on the network and also transmits the audio data to be transmitted accurately in the actual meeting. Complementing the inability to provide a satisfactory service for multimedia users because the quality of service (QoS), which is the biggest disadvantage of the Internet, is not guaranteed, it reduces network load by using two different transmission media and also provides important voice information. It can be transmitted reliably.

The hardware needed to implement an audio conference requires a voice processing board that can process voice and a switching board that can distribute calls to telephone stations. The voice processing board is responsible for processing incoming phone signals and converting the analog voice of the phone into a digital form that can be processed by a computer in real time. In addition, the role of the switching board is to switch the call received from the telephone line to each station in the voice processing board. Once a person wants to join a meeting, they dial one of a number of phones connected to the CTI server. Or, a number of lines are bundled into one phone number and the main phone is called. Once the call comes to the CTI server, the server program on the CTI server picks up the call and connects to an unused (idle) phone or waits for another call to start the meeting. There may be three cases in the voice conference method. First, the conference mode between external calls, the second conference mode, and finally the conference between external calls.

The image transmission protocol is composed of the existing ITU-T H.323 protocol as it is, but using only the portion of the image transmission of the H.323 protocol. The image compression codec uses H.261, which presupposes the camera signal of the current TV. This system uses the QCIF (Quater Common Intermediate Format) method to reduce the size of the image data to be transmitted and reduce the bandwidth occupancy. First, in order to transmit an image, a video capture board and a camera must be installed, and a client program is executed in the client computer as shown in FIG. 1C, which can capture, compress, and transmit an image.

Referring to FIG. 1B, through a separate transmission of multimedia consisting of a video conferencing server equipped with a client computer 14 comprising a video 12 video camera and a telephone 16 and a voice processing board 20 and a NIC 22. In the CTI video conferencing system, analog audio data input through the telephone 16 and digital video data input through the video 12 camera are not collected and transmitted to a single medium, but rather separated into two different media, namely, Network traffic is distributed by separately transmitting through the telephone network 18 for voice data and the Internet 24 for image data. When voice data through the telephone 16 is continuously detected by the voice detection unit of the client computer 14, image data from the video 12 camera is also continuously transmitted in proportion to this, i.e., the caller 16 If you do not speak through the handset, the voice detection unit of the client computer 14 detects it and transmits the input image data from the video 12 camera as a still image, and the caller calls the handset of the telephone 16. In the case of continuous speech through the voice detection unit of the client computer 14 detects this and transmits the image data at a variable transmission rate. The delay time of the voice data reaching the destination through the telephone network 18 is much shorter than the image data reaching through the Internet 24, so that the voice is based on the voice data from the voice conference server 36 or the MCU 34. The data is transferred in synchronization with the image data.

Recently, T-Contents such as TV home shopping, home banking, and TV2Web using T-Commerce using digital data broadcasting channels in an interactive TV connected to a set-top box (STB) providing interactive service Digital data broadcasting provides active internet information retrieval and electronic commerce functions as well as broadcasting program related information and weather information such as weather, news and traffic through the broadcasting network.

Currently, the world standard is adopted as ATSC-DASE in the US and DVB-MHP in Europe, and US ATSC-DASE (Advanced Television Systems Committee-Digital TV Application Software Environment) is the standard for data broadcasting service in terrestrial broadcasting. ) And ATVEF (Advanced TV Enhanced Forum) have proposed the use of Java and HTML / xHTML, and DASE-2 has been confirmed following DASE-1, and European DVB-MHP (Digital Video Broadcasting-Multimedia Home Platform) Is being studied.

In the US ATSC standard, MPEG-2 is adopted as the video signal and Dolby AC-3 is adopted as the audio signal. Signal multiplexing follows the transport layer defined by MPEG-2.

Data broadcasting service based on DASE (Digital TV Application Software Environment) consists of a combination of an application written in DASE Java API and a declarative application written in HTML.

In Europe, Digital Video Broadcasting (DVB) has been selected as the digital broadcasting standard by the European Telecommunication Standardization Institute (ETSI), and transmission systems for satellite (DVB-S), terrestrial (DVB-T) and cable (DVB-C) channels. In this case, IP (Internet Protocol) content is packetized in MPEG-2 transport stream format and transmitted through this channel. In the European market, data bi-directional services are categorized into three groups: weather channels, information-oriented channels such as EPG (Electronic Program Guide), which allows you to display TV program schedules and program searches via remote control, electronic commerce including home banking, and stocks. Provide services connected to investment channels.

For example, T-Commerce installed a set-top box (STB) that provides two-way service to an existing TV, connected to a cable network, and received an interactive T-Contents service through a data broadcasting channel, in addition to receiving an existing A / V broadcasting signal. In other words, Internet TV (Internet TV) method which provides various additional services such as TV2Web internet information search and TV home shopping and home banking, and a method using interactive digital TV that supports data broadcasting are proposed.

However, at present, PDA2PDA video conferencing has not yet been developed through mobile communication network such as IMT-2000 between PDA (Pocket-PC) equipped with CDMA modem or wireless LAN card. In the interactive TV, which is a connected TV, there is a problem that PDA2TV video conferencing service is not provided through a data broadcasting channel in addition to receiving an A / V broadcasting signal from an existing broadcasting channel.

The present invention has been proposed in order to solve the problems of the prior art, and an object of the present invention is a system interworking with a mobile communication network, an Internet network, a CATV network, and a PDA equipped with a CDMA modem or a wireless LAN card, such as IMT-2000. Peer-to-peer PDA2PDA Video IP Phone service through mobile communication network enables 1: 1 video call, and set-top box that provides two-way service in the system interworking with mobile communication network, Internet network and CATV network. Interactive peer-to-peer (P2P) type PDA2TV, TV2TV video IP phone through data broadcasting channel in addition to existing A / V broadcasting signal by using interactive TV that can provide interactive service through remote control or key input of TV connected to STB) It provides peer-to-peer based PDA2PDA, PDA2TV, TV2TV video IP phone service provision system in system linked with mobile communication network, Internet network, CATV network which provides 1: 1 video call as a service.

Another object of the present invention is to provide a peer-to-peer-based PDA2PDA, PDA2TV, and TV2TV video IP phone service providing system in a system interworking with a mobile communication network, an Internet network, and a CATV network, which are particularly suitable for performing the above method.

In order to achieve the object of the present invention, the present invention is a system linked to a mobile communication network, Internet network, CATV network: Peer-to-peer method for mounting a wireless LAN card or CDMA modem for PDA2PDA, PDA2TV, TV2TV video IP phone service DB of IP Binder in video IP phone client (client2) installed in one PDA (Pocket-PC) and video IP phone client (client1) installed in set-top box (STB) providing interactive service connected to the PDA or interactive TV. Register the registration information, the IP address and port number to be used by the web client or each client (client1, client2), the IP Binder sets the caller's IP list information to the PDA and the set-top connected to the interactive TV. A subscription and IP binding step of providing the client installed in the box STB; End-to-end of PDA2PDA, PDA2TV, TV2TV video IP phone with peer-to-peer method of sending and receiving CONNECT REQUEST, ACK, CONNECT message by IP address and port number of sender and receiver through session manager for 1: 1 video call session management Establishing a TCP / IP connection; After establishing the TCP / IP connection, transmitting / receiving audio / video (A / V) data to the RTP / UDP / IP through the MPEG2 A / V codec to provide a video voice call between the sender and the receiver. Transmitting and receiving video and audio data; And a TCP / IP disconnection step for terminating the end-to-end call of the peer-to-peer (P2P) PDA2PDA, PDA2TV, TV2TV video IP phone after the data transmission and reception. It provides peer-to-peer based PDA2PDA, PDA2TV, and TV2TV video IP phone service providing method in system linked with CATV network.

In order to achieve another object of the present invention, the present invention can connect to a web client via a WWW server through the Internet network, and manages the subscription information, IP address and port number, and billing information for the paid service IP Binder including a database to manage; A PDA (Pocket-PC) equipped with a CDMA modem to be connected to a mobile communication network, a PDA (Pocket-PC) equipped with a wireless LAN card wirelessly connected to an AP (Access Point) of a wireless LAN connected to the Internet network, and MPEG-2 video codec and MPEG2 audio codec installed in set-top box (STB) that provides interactive service connected to interactive TV and for compressing and decompressing video and voice of sender and receiver captured from webcam and microphone for PDA or TV. Provides a peer-to-peer based PDA2PDA, PDA2TV, and TV2TV video IP phone service providing system in a system interworking with a mobile communication network, an internet network, and a CATV network, comprising PDA2PDA, PDA2TV, and TV2TV video IP phone clients using do.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. This embodiment is not intended to limit the scope of the invention, but is merely illustrative.

2 is a diagram illustrating a network system in which a CATV network, an Internet network, and a mobile communication network are interworked for the present invention.

The present invention provides a PDA (Pocket-PC) 22 equipped with a CDMA modem or a wireless LAN card 21 in a mobile communication network such as an IMT-2000 network, and a wireless LAN card communicating with an AP connected to an IP network. Provides PDA2PDA video IP phone service of P2P (Peer To Peer) method between the installed PDAs 22, and provides bidirectional service in a system interworking with CATV network 100, Internet network 200, and mobile communication network 300. The interactive TV (1) transmits signals transmitted from a plurality of program providers (PPs) through a remote controller or a key input unit of an interactive TV 1 connected to a set top box (STB) 2 provided. Peer-to-peer (P2P) PDA2TV, a TV interactive service that provides 1: 1 video voice call while watching existing TV A / V broadcast signals through data broadcasting channels, in addition to existing A / V broadcast signals provided by It is to provide TV2TV video IP phone service.

At this time, the Internet network 200 and the mobile communication network 300 for interworking is interworked by the IWF 2 (Inter Working Function) 227, which is a gateway for interworking with the http protocol and the IMT-2000 / WAP / ME protocol, The CATV network 100 using the DOCSIS protocol and the Internet network 200 using the http protocol are interworked with the CMTS equipment 147, and the CATV network 100 and the mobile communication network 300 are DOCSIS protocol and IMT-. It is interworked by IWF 1 137, which is a gateway interworking with 2000 / WAP / ME protocol. The CMTS device 147 is a device for converting cable modem data into data packets for transmitting and receiving data. From the interactive TV in the home to the CMTS equipment 150 uses DOCSIS protocol, and the Internet network in the CMTS equipment 150 uses an IP protocol.

Referring to FIG. 3, a plurality of encoders for receiving A / V broadcast signals of a plurality of broadcast channels from a head end system of a CATV broadcasting station for carrying out the present invention to a CATV broadcasting station H / E (Head Sender) ( 37) a mux 47 that tunes channels for a plurality of encoded A / V broadcast signals to provide a selected A / V broadcast signal, a combiner 57 that sums frequencies; An up-converter 67 for raising the frequency band, an optical transmitter 77 for transmitting an RF signal as an optical signal, and a CATV network that is a node for distributing the optical signal to local subscribers. Conversation with multiple optical network units (ONUs) (127) for connecting optical and coaxial cables, and up to hundreds of subscribers, and set-top boxes (STBs) for two-way service in apartments or homes In the type TV 1, the viewer controls the While watching the existing A / V broadcasting signal, select PDA2TV, TV2TV video IP phone service on T-Contents menu screen to provide 1: 1 video call service using interactive video IP phone through data broadcasting channel on interactive TV. IP address and port number input by IP Binder which provides caller list information connecting IP address and port number of sender and receiver to peer to peer between PDA2PDA, PDA2TV, TV2TV video IP phone client (Client1, Client2) Provide 1: 1 video conferencing in a (P2P) manner.

At the same time, A / V broadcasting program provided from program provider (PP) receives unidirectional A / V broadcasting signal except for interactive elements such as news, drama, show, movie, quiz, etc. Provides PDA2TV video IP phone service from the T-content of an interactive TV connected to a set-top box (STB) providing an interactive service through a broadcast channel, and transmits the PDA 22 or the interactive TV while watching an existing broadcast. (1) Automatically pop-up PDA2TV and TV2TV video IP phone clients on the interactive TV screen from the set-top box (STB) when an internet video call is received. Provides interactive PDA2TV and TV2TV Video Phone Service.

Referring to FIG. 4A, a peer-to-peer (P2P) based video IP phone service system according to the present invention can connect to a web client via a WWW server through an internet network, and the membership information, IP address, and port number. And IP Binder including a database for managing billing information for paid services,

A PDA (Pocket-PC) 22 equipped with a CDMA modem 21 to be connected to a mobile communication network, and a PDA equipped with a wireless LAN card wirelessly connected to an AP (Access Point) of a wireless LAN connected to the Internet network. PC) 22 and PDA2PDA, PDA2TV, and TV2TV video IP phone clients of the P2P method installed in the memory of the set-top box (STB) 2 providing the interactive service connected to the interactive TV 1 (client1, client2). It is composed of In this case, the set-top box (STB) providing the interactive service with the PDA uses the same Windows CE operating system for protocol compatibility, and the PDA2PDA, PDA2TV, using an embedded visual C ++ (eVC ++ 3.0 or higher) programming tool Program TV2TV video IP phone client.

Mobile IPv4 or Mobile IPv6 protocol including Home Agent (HA) or Foreign Agent (FA) to provide mobility of mobile terminal such as PDA or Pocket-PC MN (Mobile Node) module is mounted on the PDA.

The set top box (STB) 2 is provided with an interactive service, and is equipped with a video IP phone client application program including an MPEG2 video codec and an audio codec, and connected to an MPEG2 video codec to input and output video data to and from the interactive TV. It includes an NTSC encoder and an NTSC decoder, and in the MEPG2 audio codec, A / D conversion is performed on the voice input by the microphone from the interactive TV 1, and is input to the MEPG2 audio codec to be compressed to RTP / UDP / IP. When transmitting the voice to the speaker of the interactive TV, the compressed voice signal received by the RTP / UDP / IP is restored by the MEPG2 audio codec to convert the voice to the speaker of the interactive TV after D / A conversion. Is output.

4b illustrates a protocol stack for PDA2PDA, PDA2TV, and TV2TV video IP phone services of a P2P method through an interworking network with a mobile communication network, an internet network, and an optical CATV network according to the present invention.

The set-top box (STB) 2 that provides an interactive service connected to the PDA (Pocket-PC) and the interactive TV (1) in which the P2P type PDA2PDA, PDA2TV, and TV2TV video IP phone clients are installed is identical to that of Windows CE. The video codec and the audio codec used in the present invention using the operating system, and for compressing and restoring the video and voice of the sender and receiver captured from webcam and microphone for PDA or TV, are MPEG2 video codec and MPEG2 audio codec or MPEG4 A. The / V codec is available, and it is compatible with Microsoft's Windows Media codec. PDA2PDA, PDA2TV, TV2TV Video Compressed and reconstructed video and voice, which are IP phone call data, are transmitted / received through the RTP / UDP / IP protocol through interworking network with mobile communication network, Internet network and CATV network. It is output through a PDA or the interactive TV screen and a speaker.

At this time, after the IP address and port number registration process with IP Binder, after recognizing the caller IP address and port number between the transceiver and the receiver, the PDA2PDA, PDA2TV, TV2TV video IP phone client of the sender and receiver in a P2P method (client1 After setting TCP / IP connection of PDA2PDA, PDA2TV, TV2TV video IP phone by session manager by matching source IP address and port number and destination IP address and port number for session establishment, client2) After the 1: 1 video IP phone video call through RTP / UDP / IP for the 1: 1 video voice call between the receiver and the receiver, the PDA2PDA, PDA2TV, TV2TV video IP phone client of the sender and receiver The video IP phone call ends after a TCP / IP disconnection step.

4C illustrates a P2P type PDA2PDA, PDA2TV, and TV2TV video IP phone service primitives according to the present invention.

A client (client2) installed in a PDA (Pocket-PC) equipped with a wireless LAN card or a CDMA modem for service of PDA2PDA, PDA2TV, TV2TV video IP phone by peer-to-peer (P2P) method, and the PDA or interactive TV (1 Video ID phone client (client1) installed in STB (Set Top Box) (2) that provides two-way service connected to) from DB of IP Binder to member ID, password, user name, address, resident for paid service Registration information including number, contact information, IP address, port number to be used by the web client or each video IP phone client (client1, client2), the IP Binder the caller IP List information that the transceiver holds the said A subscription and IP binding step of providing a PDA and a video IP phone client installed in the interactive TV;

CONNECT REQUEST, ACK to connect TCP / IP socket by inputting IP address and port number of sender and receiver through Session Manager in PDA2PDA, PDA2TV, TV2TV video IP phone client for 1: 1 video call session management TCP / IP connection setting step of PDA2PDA, PDA2TV, TV2TV video IP phone by 3-Way Handshake for sending and receiving CONNECT message;

After the TCP / IP connection is established, audio / video is transmitted to RTP / UDP / IP through MPEG2 A / V codec to provide video voice call between PDA2PDA, PDA2TV, TV2TV video IP phone between sender and receiver. (A / V) video and audio data transmission and reception step of transmitting and receiving data; And

After the data transmission and reception, TCP / IP disconnection step for ending the end-to-end call of the peer-to-peer (P2P) PDA2PDA, PDA2TV, TV2TV video IP phone.

4d is a flowchart illustrating a method for providing a peer-to-peer based video IP phone service in a system interworking with a mobile communication network, an internet network, and a CATV network according to the present invention.

If registration information, IP address and port number to be used by the IP Binder is registered through the Internet client or the mobile communication network through the web client or the PDA client (step S1), the IP Binder is a name, an IP address, a port. The caller IP list information including the number is provided to the PDA and the interactive TV held by the transceiver (step S2).

After user authentication (step S3), one of three types of PDA2PDA, PDA2TV, and TV2TV video IP phone service is selected in a peer-to-peer (P2P) manner (step S4).

For example, if the PDA2PDA video IP phone service is selected, the IP address and port number of the sender and receiver can be entered through the session manager in the PDA2PDA, PDA2TV, and TV2TV video IP phone clients for 1: 1 video session management. TCP / IP connection is established by 3-Way Handshake to send and receive CONNECT REQUEST, ACK, and CONNECT messages to connect the TCP / IP socket (step S5).

After the TCP / IP connection is established, the MPEG2 A is transmitted between the sender and the receiver by buffering and receiving buffering video, voice, and text data for providing a video voice call on a PDA2PDA, PDA2TV, TV2TV video IP phone. Transmit / receive audio / video (A / V) data, i.e., sender and receiver video and audio data, which transmit and receive via RTP / UDP / IP via the / V codec (step S6).

After transmitting and receiving the video and audio data, the TCP / IP connection for terminating the end-to-end call of the peer-to-peer (P2P) PDA2PDA, PDA2TV, TV2TV video IP phone is released (step S7). ).

In step S4, if the PDA2TV or TV2TV video IP phone service is selected, the STB and the interactive TV capable of two-way service are turned on, and if it is turned on, the receiver receives a video call signal. A message indicating that a video IP phone call is received on the screen of the interactive TV 1 together with a telephone call to the speaker of the interactive TV 1 so as to be recognized is visually and visually displayed on the TV screen (step S8). If the video IP phone answers the call by operating the remote control or key input unit of the interactive TV (step S9), the receiver receives the existing one-way A / V broadcast and communicates with the sender through the data broadcast channel. Steps S5, S6, and S7 are performed for TCP / IP connection of the video IP phone, and the video IP phone client installed in the PDA and PDA or PDA and TV in a peer-to-peer manner. You can make a 1: 1 video voice call.

Similarly, each video IP phone client is installed in a set-top box (STB) providing an interactive service, so that a 1: 1 video voice call can be made in a peer-to-peer manner in an interactive TV connected to the STB.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below. Or it may be modified.

As described above, a peer-to-peer (P2P) based PDA2PDA, PDA2TV, and TV2TV video IP phone service providing system and method in a system interworking with a mobile communication network, an Internet network, and a CATV network according to the present invention include a CDMA modem or a wireless LAN. Peer-to-peer PDA2PDA Video IP Phone service is possible between PDA equipped with card through mobile communication network such as IMT-2000. 1: 1 video call is possible, and mobile communication network, internet network and CATV network interwork. PDA2TV, TV2TV video IP phone by selecting T-Contents through data broadcasting channel in addition to receiving existing A / V broadcasting signal through remote control or key input unit in interactive TV connected to set-top box (STB) that provides two-way service in advanced system The service has the effect of providing 1: 1 video voice call while watching the other party's video.

1A is a block diagram of a CTI-based video conferencing system using a conventional H.323.

1B is a CTI based video conferencing system component using conventional H.323.

Figure 1c is a CTI-based image transmission client screen using a conventional H.323.

2 is a diagram illustrating a network system interworking a mobile communication network, an Internet network, and an optical CATV network.

3 is a block diagram of an H / E system of a CATV broadcasting station for the present invention.

Figure 4a is a configuration diagram of a peer-to-peer (P2P) based video IP phone service system according to the present invention.

Figure 4b is a protocol stack for PDA2PDA, PDA2TV, TV2TV video IP phone service of the P2P method through an interworking network with a mobile communication network, Internet network, optical CATV network according to the present invention.

Figure 4c is a P2P method PDA2PDA, PDA2TV, TV2TV video IP phone service primitive according to the present invention.

4d is a flowchart illustrating a method for providing peer-to-peer based PDA2PDA and PDA2TV video IP phone services in a system interworking with a mobile communication network, an internet network, and a CATV network according to the present invention.

<Explanation of symbols for main parts of drawing>

1: TV 2: Set Top Box (STB)

3: PC 4: cable modem

17: Satellite antenna 27: Broadcast program provider (PP)

21: CDMA modem, wireless LAN card 22: PDA (Pocket-PC)

37: encoder 47: mux

57: Combiner 67: Up-converter

77: Optical Transmitter (OT) 87: CMTS Equipment

97: optical receiver (OR) 127: ONU

137: IWF 1 227: IWF 2

100: CATV network 147: CMTS equipment

200: Internet network 300: Mobile communication network

Claims (4)

In a system interworking with mobile communication network, Internet network, CATV network: Video IP phone client (client2) installed in PDA (Pocket-PC) equipped with wireless LAN card or CDMA modem for peer-to-peer, PDA2PDA, PDA2TV, TV2TV video IP phone service, and connected to the PDA or interactive TV Register the membership information, IP address and port number to be used by the web client or each client (client1, client2) from the video IP phone client (client1) installed in the set-top box (STB) that provides the interactive service. Then, the IP Binder member registration step of providing the caller IP List information to the client installed in the set-top box connected to the PDA and the interactive TV held by the transceiver; PDA2PDA, PDA2TV, Peer-to-Peer (P2P) method to send / receive CONNECT REQUEST, ACK, CONNECT messages by IP address and port number of sender and receiver through session manager for 1: 1 video call session management. Establishing a TCP / IP connection of the TV2TV video IP phone; After establishing the TCP / IP connection, transmitting / receiving audio / video (A / V) data to the RTP / UDP / IP through the MPEG2 A / V codec to provide a video voice call between the sender and the receiver. Transmitting and receiving video and audio data; And And a TCP / IP disconnection step for terminating end-to-end call of the peer-to-peer (P2P) PDA2PDA, PDA2TV, TV2TV video IP phone after the data transmission and reception. Peer-to-peer-based PDA2PDA, PDA2TV, and TV2TV video IP phone service provision in a system linked with a network. The method of claim 1, The PDA2PDA video IP phone service P2P (Peer To Peer) type PDA2PDA video IP phone service between PDA (Pocket-PC) equipped with CDMA modem in mobile communication network and PDA equipped with wireless LAN card communicating with AP (Access Point) connected to IP network and, Interactive from a broadcast sender through a remote control or key input unit of an interactive TV connected to a set-top box (STB) providing an interactive service in a system interworking with a CATV network 100, an internet network 200, and a mobile communication network 300 In addition to the existing A / V broadcasting signals provided by TVs, mobile communication networks, Internet networks, and CATVs, which provide PDA2TV and TV2TV video IP phone services of peer-to-peer (P2P) type TV interactive services through data broadcasting channels. Peer-to-peer-based PDA2PDA, PDA2TV, TV2TV video IP phone service providing system connected to the network. The method of claim 2, The PDA2TV, TV2TV video IP phone service is A / V broadcast program provided from a program provider (PP) of a CATV network receives a unidirectional A / V broadcast signal transmitted from a broadcast sender on the interactive TV connected to a set top box (STB) providing a bidirectional service. ; And In the process of watching the unidirectional A / V broadcasting signal on the interactive TV, the video IP phone client installed in the PDA equipped with the CDMA modem or the wireless LAN card is connected to the CATV network via the mobile communication network or the interactive TV. When the TCP / IP connection setting message of the video IP phone is received, the message is displayed interactively on the screen informing the user of the call connection attempt, and the telephone notification sound is provided so that the receiver automatically operates the remote control or the key input unit. Pops up the video IP phone client to a specific location on the screen of the interactive TV and establishes a TCP connection through a data broadcasting channel, and uses video and voice using RTP / UDP / IP for 1: 1 video voice call between sender and receiver. Mobile communication network which provides PDA2TV, TV2TV video IP phone service through data transmission and reception of TCP / IP connection Peer-to-peer-based PDA2PDA, PDA2TV, TV2TV video IP phone service providing method in connection with Internet, CATV network. An IP Binder including a database (DB) capable of connecting to a web client via a WWW server through an Internet network, managing the membership information, IP address and port number, and managing billing information for a paid service; A PDA (Pocket-PC) equipped with a CDMA modem to be connected to a mobile communication network, a PDA (Pocket-PC) equipped with a wireless LAN card wirelessly connected to an AP (Access Point) of a wireless LAN connected to the Internet network, and Installed in a set-top box (STB) that provides interactive services connected to an interactive TV, MPEG-2 video codec / audio codec for compressing and restoring video and audio of senders and receivers captured from webcam and microphone for PDA or TV. Peer-to-peer-based PDA2PDA, PDA2TV, and TV2TV video IP in systems linked to mobile communication networks, Internet networks, and CATV networks, comprising PDA2PDA, PDA2TV, and TV2TV video IP phone clients that use the MPEG4 video codec / audio codec. Phone service provision system.