KR100341089B1 - System architecture and link control method to make the user of remote terminal access internet through the MPEG-2 based broadcasting network - Google Patents

Abstract

The present invention relates to a broadcasting / communication integrated system and a connection control method capable of accessing the Internet in an MPEG-2 digital broadcasting network. The present invention relates to a broadcasting / communication integrated system for providing an Internet access service based on an MPEG-2 digital broadcasting network. A service gateway system that is connected to a broadcasting network access terminal device and a broadcasting system having capability to control communication, independently communicates with each terminal device, and generates a certain range of random numbers in a channel setting request and transmits them to the service gateway. Provided are a broadcasting / communication integrated system and a connection control method capable of internet access in an MPEG-2 digital broadcasting network comprising a user terminal block.

Description

System architecture and link control method to make the user of remote terminal access internet through the MPEG-2 based broadcasting network}

The present invention relates to a broadcasting / communication integrated system and a connection control method capable of accessing the Internet in an MPEG-2 digital broadcasting network. Particularly, the present invention relates to a specific user terminal apparatus through a digital broadcasting network conforming to the MPEG-2 standard while using minimal resources. The present invention relates to a broadcasting / communication integrated system and a connection control method capable of internet access in an MPEG-2 digital broadcasting network for enabling communication with a host of an internet network.

In the field of digital broadcasting technology, technologies for expanding transmission capacity and compressing transmission information have been developed for efficient transmission of a large amount of information. Recently, technologies for integrating a broadcasting network and a communication network have been actively progressed. A broadcasting network is a network that simultaneously transmits information to all users using a receiving terminal device, and can be used simultaneously by many subscribers.

The use of the Internet requires a separate address for the Internet, which is not sufficient for all tens of thousands or hundreds of thousands of subscribers in a broadcast network. In addition, the number of receiving devices for configuring the return channel will also be enormously expensive to secure as many as the number of subscribers, which will eventually burden the service costs of the subscribers.

In order to provide an interactive information communication service in a digital broadcasting network, a logical bidirectional point-to-point communication channel between a transmitting station of a broadcasting station and a specific receiving terminal device is required. In the broadcasting network, a large number of receiving terminal devices are separately installed and used. However, since only a few users use the interactive communication service, only a small number of logical point-to-point communication channels are used. It can provide an interactive information and communication service through. Of these subscribers, only a few maintain a point-to-point channel when necessary. To this end, allocating fixed resources to all subscribers is inefficient, and some resources are impossible to allocate to all. Thus, it is efficient to allow the subscriber to request a connection when needed and to maintain it only while the subscriber is using it.

In the digital broadcasting network, MPEG-2 is used as a standard method for real-time compression, multiplexing, transmission, and reconstruction of information.In the MPEG-2 transport stream used for transmission, transmission units are classified into packets of 188 bytes, and packet identifiers are used. Using the PID, programs of different channels are transmitted to a receiving terminal device, and a logical channel is formed between a broadcasting station and a receiving terminal station using a PID to identify a transmitted program. In order to provide interactive information and communication service in digital broadcasting network, it is necessary to configure individual logical two-way point-to-point individual communication channel between a transmitting device of a broadcasting station and a receiving device of a specific terminal. As a configuration method, a PID may be allocated exclusively to individual users or a same PID may be assigned to multiple users and a logical channel may be repartitioned using an internal packet address.

DSM-CC Multi-Protocol Encapsulation method using private section is provided as standard to provide Internet access service through MPEG-2 transmission network, but it cannot provide logical connection method between return channel and channel for broadcasting network. It only shows how to send datagrams by appending the address of the Media Access And Control (MAC) layer to the Private Section. In this method, a limited number of PIDs are to be shared by all subscribers who want to communicate, and as the number of subscribers increases, the amount of data received and received by the terminal increases greatly.

Accordingly, the present invention configures a point-to-point communication channel through a broadcasting network and sets up a communication channel capable of bidirectional communication using a return channel, through which the user of the terminal apparatus requests, sets, maintains, and terminates a communication channel. It is an object of the present invention to provide a broadcast / communication integrated system and a connection control method that can access the Internet in an MPEG-2 digital broadcasting network for accessing the Internet through a service such as the above.

In order to achieve the above object, a broadcast / communication integrated system capable of accessing the Internet in an MPEG-2 digital broadcasting network according to the present invention is connected to a broadcasting network access terminal apparatus and a broadcasting system having a transmission / reception capability based on the MPEG-2 digital broadcasting network. It is characterized in that it comprises a service gateway system for controlling the communication, and performs communication independently from each terminal device, and a user terminal block for generating a certain range of random numbers when the channel setting request is transmitted to the service gateway; .

In addition, the connection control method of the broadcast / communication system that can access the Internet in the MPEG-2 digital broadcasting network according to the present invention for achieving the above object requires a connection to the service gateway as the user selects the Internet application program of the terminal station. And if the subscriber authentication is successful by authenticating the subscriber at the service gateway, the requesting terminal allocates a transmission / reception channel, and checks whether network resource allocation is possible in the allocated transmission / reception channel. Notifying the terminal station of the failure, and the terminal station receiving the announcement announces the connection failure to the user, and if the network resources can be allocated to the allocated transmission and reception channel, it is possible to initialize and receive the return channel receiver of the service gateway Informing the terminal station that the connection is successful; The terminal station receiving the success message initializes the return channel, initializes the reception channel through the broadcasting network, and then broadcasts the successful connection to the user, and the user of the terminal station communicates with hosts on the Internet through an application program. Performing communication; when the user interrupts the application program to request disconnection; the terminal station requests to disconnect from the service gateway; and the service gateway releases the broadcast channel related resources and the return channel receiving device. And notifying the terminal station of the disconnection, and the terminal station receiving the disconnection releases the transmission channel and releases the reception broadcast channel, and then informs the user of the completion of the disconnection.

1 is a structural diagram of a broadcasting / communication integrated system having internet access according to the present invention;

2 is a structural diagram of a communication control apparatus in a service gateway system according to the present invention;

3 is a flow chart for explaining the process according to the user connection and message transmission of the service gateway system according to the present invention.

4 is a structural diagram of a communication control device in a user terminal block according to the present invention;

5 is a flow chart for explaining a process according to user access and message transmission of a user terminal block according to the present invention.

6 is a structural diagram of a protocol stack applied to the present invention.

7 is a view for explaining the structure of a control message applied to the present invention.

8 is a view for explaining a connection control process of the Internet access channel according to the present invention.

9 is a diagram for explaining a state of a terminal station according to a connection control procedure.

10 (a) and 10 (b) are diagrams for explaining the request message format and the response message format.

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

110: service gateway system 120: MPEG-2 digital broadcasting network

130: user terminal block 140: return channel

150: broadcast program 160: the Internet

170: multimedia server 111: broadcast control device

112: broadcast transmission device 113: communication control device

114: receiving device 131: application software

132: communication control device 133: receiving device

134: transmitting device

In the broadcasting network, a large number of receiving terminal devices are individually installed and used. In reality, only a few of the users who use the interactive communication service at any moment can provide the communication service. In order to allocate a point-to-point communication channel to all of a plurality of terminal devices connected to a broadcasting network, many channel identifiers are required. However, if you do not specify a channel identifier for communication to a terminal device that does not actually use or require communication, and assign a channel identifier only to the terminal device that requires communication, a small number of channel identifiers may be used. Individual communication channels can be configured.

In such an environment, after calculating the number of virtual channels based on the service bandwidth of each subscriber from the bandwidth for data communication in the digital broadcasting network using a small number of subscribers using the Internet at the same time among the plurality of subscribers using the broadcasting network, Given that connected users do not consistently use the bandwidth, they can be multiplied by a certain ratio to determine the maximum number of concurrent users. The present invention relates to a connection control procedure for allocating, maintaining, and retrieving a logical channel for subscribers' access to the Internet, which is configured in a multi-level aggregation form, to maintain the connection of an interactive Internet channel through an MPEG-2 digital broadcasting network. It's a way.

In order to provide an internet access service using a broadcasting network, the present invention provides a service that is connected between a broadcasting network access terminal apparatus having a transmission / reception capability and a broadcasting system to control communication and independently perform communication with each terminal apparatus. It consists of a gateway. The service gateway and the terminal station dynamically operate the non-fixed common channel and the non-fixed terminal station identifier so that the allocation information of the individual transport channel can be protected from malicious information stealing. This method avoids repeatedly providing the same type of information necessary for the analysis of information for malicious information stealing.

To this end, the terminal device generates a predetermined range of random numbers and transmits them to the service gateway when the channel setting request is made. The service gateway uses the random number sent by the terminal device as an address of a packet transmitted to the terminal device. When the terminal device remembers the random number sent by the terminal device and receives the information from the service gateway, the terminal device finds its own by comparing the address included in the packet. The common signaling channel for establishing a connection between the terminal device and the service gateway is determined by TID information included in a random number presented by the terminal station upon connection request. The service gateway manages the available individual channels and allocates interactive individual channels with the terminal device upon request from the terminal device, and transmits the configuration information to the terminal device through the common signaling channel of PID / TID presented by the terminal device. To pass. Individual channel information managed by the service gateway includes a PID / TID for communication traffic transmission, a PID / TID for control, an IP address, a receiver for a return channel, and related information.

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

1 is a structural diagram of a broadcast / communication integrated system having Internet access according to the present invention.

As shown, including the service gateway system 110, the MPEG-2 digital broadcasting network 120, the user terminal 130, the return channel 140, the broadcast transmitter 112, the terminal receiver 133, A point-to-point communication channel component using a broadcasting network composed of a terminal transmitter 134 and a central station receiver 114, a broadcast program 150 of an original purpose of a broadcasting network, an input device, and a multimedia server 170 for high-speed multimedia service. It consists of.

The service gateway system 110 includes a broadcasting station 111 for multiplexing and controlling a broadcast program and a communication channel, and a central station communication for controlling the reception through the conversation (return) channel 140 and the transmission through the broadcast network 120. The control device 113 is included. In addition, the user terminal includes a terminal communication control device 132 for interfacing different communication media or channels of the broadcasting network 120 and the return channel 140 with the communication application software 131 as a bidirectional communication channel.

2 is a structural diagram of a communication control apparatus in a service gateway system according to the present invention, and shows functional blocks for providing an Internet access service through an MPEG-2 digital broadcasting network.

Referring to the operation of each block, the return channel interface block 280 is combined with the return channel network terminator to receive all signals from the user terminal, and separates the control signal and the user data from the received signals and packetizes the user data. Perform the function. The connection control block 250 receives the connection establishment and disconnection request transmitted through the return channel interface block 28 and thus sets and terminates the communication path for the user terminal. In addition, it manages the information on the allocation, maintenance and termination of the individual channel for the user's communication, and performs the validation of the common channel presented by the user, while related to the individual channel allocation through the transmission control block 240 Provide information to the user terminal device. Also, the user data packet received from the return channel interface block 280 is transmitted to the information server or the existing Internet 160 through the switch 290. The user authentication block 260 determines whether the user of the user terminal is an allowed user in the process of establishing the connection of the user terminal. The switch block 290 sends the user data packet input via the connection control block 250 to the multimedia information server via the information server interface block 230 according to the destination address, or via the communication network interface block 210. To send to the Internet (160). In addition, the switch block 290 transmits a data packet input from the multimedia information server or the Internet 160 via the communication network interface block 210 to the user terminal connected to the broadcasting network via the transmission control block 240. The information server interface block 230 converts the user data packet into a protocol used by the multimedia information server and transmits it, and converts the protocol used by the multimedia information server into a packet form such as user data and transmits it to the switch block 290. Perform the function. The protocol to convert becomes a lower layer protocol below the network layer. Similarly, the communication network interface block 210 converts and transmits a user data packet to a protocol used by a connected communication network for connection to the Internet 160, and converts a protocol of the communication network into a packet form such as user data to switch block 290. It performs the function of transferring to. The protocol to convert becomes a lower layer protocol below the network layer. The proxy block 220 performs a connection with a host on the Internet on behalf of a terminal in order to improve transmission quality of WWW, FTP, etc. among Internet access services, and transmits the result to the terminal. The transmission control block 240 analyzes the user packet address and performs a conversion function of embedding the packet into a logical link for the assigned user terminal of the broadcasting network. In this process, the user packet is partitioned to fit the MPEG transmission stream packet, and the packet identifier (PID) and the table identifier (TID), which are logical channel control information of the transmission stream, are filled with those allocated to the corresponding user terminal during connection establishment. It is sent on the broadcasting network. The broadcast network interface block 270 outputs the MPEG transmission stream packet generated in the transmission control block 240 to the broadcast transmission device according to the interface standard of the broadcast transmission device 112.

3 is a flowchart illustrating a process according to a user connection and a message transmission of a service gateway system according to the present invention.

When the user message is received through the return channel interface 280 (310), the following process is performed according to the type of the received user message.

If the received user message is a message to be relayed to a communication network or delivered to a multimedia information server (311, 312), the received message is reconstructed to generate a packet (313) and converted to a frame suitable for the network to be relayed (314). In operation 315, the mobile station transmits the data to the communication network or the multimedia information server.

If the received user message is a cancellation message (316), the assigned transmission channel is terminated and the connection information is initialized (317), a packet including a cancellation confirmation message is generated (318), and then the transmission frame is synthesized (329). This is transmitted (330).

If the received message is a connection request message (319), authentication is performed through the user authentication block 260 (320), and the validity of the authenticated user is determined (321), and if it is not an authorized user, a rejection message. Generates an MPEG transport stream packet including the 324 and transmits it to the user terminal device through the transmission control block 240, and assigns a logical channel on the MPEG broadcast channel to be used by the user terminal to the authorized user (322). Information is registered, a connection confirmation packet is generated (323), an MPEG transport stream packet including the connection confirmation packet is generated (329) and transmitted to the user (330).

When the multimedia data packet is received from the communication network or the multimedia information server through the switch block 290 (325), the packet header is analyzed (326), the destination address is checked, and the logical channel on the MPEG broadcast channel used by the terminal corresponding to the destination address is checked. After finding the packet identifier which is the channel information (327), the multimedia data packet is divided into a size suitable for the size of the MPEG transport stream packet to generate the MPEG transport stream packet, the packet identifier is added (328), and then transmitted to the broadcasting network. The packets are synthesized into frames (329) and transmitted through the broadcast network interface 270 (330).

4 is a structural diagram of a communication control device in a user terminal block according to the present invention.

Looking at the operation of each functional block, the user terminal 130 is connected to the service gateway system 110 through the conversation channel transmission block (134, 414) and the broadcast reception block (133, 415). The connection control block 412 controls the establishment, maintenance, and termination of the connection so that the user terminal can be connected to the service gateway system 110 to form a bidirectional communication channel through the broadcast network and the conversation channel. The connection control block 412 receives information necessary for maintaining a bidirectional communication channel from the service gateway system 110 to perform reception channel setting of the broadcast reception block 415 and initialization of the protocol processing block 411. In addition, the connection control block 412 maintains and manages initialization information for network connection of the talk channel transmission block 414. The communication channel interface block 413 provides a standard device drive interface to the protocol processing block 411 to enable interworking with the service gateway system 110 through various standard protocol processing blocks. The communication channel interface block 413 performs a communication function of the connection control block 412, the conversation channel transmission block 414, and the broadcast reception block 415. In some cases, the broadcast receiving block 415 may be installed and operated outside the computer system, which is a terminal station equipment, so that the role of the communication channel interface block 413 may be different. The application software 410 is connected to the protocol processing block 411 through a standard API. The message of the application software is delivered to the talk channel block through the protocol processing block. In the reverse direction, the MPEG transport stream packet received at the broadcast reception block 415 is restored to the state before being split at the service gateway system 110 and transmitted to the protocol processing block 411 through the communication channel interface block 413. . The received packet processed in the protocol processing block 411 is delivered to the application software through the standard API. In some cases, the broadcast reception channel may need to be changed according to the application software. In this case, the application software may request the connection control block 412 to change the channel setting.

5 is a flowchart illustrating a process according to user access and message transmission of a user terminal block according to the present invention.

The user terminal 160 connects to the service gateway system 110 through the conversation channel transmission interface 134 and 414 to connect to the service gateway system 110.

If the user message is a connection establishment request (510), a connection termination request (511), and an application software message (512), the user terminal reconfigures the message to fit the conversation channel transmission frame format according to the message size. (513), and transmits to the chat channel (514).

When connection confirmation information is received from the service gateway system to the user terminal block (515), the connection control block 412 analyzes the connection confirmation message received from the service gateway (516), and if successful, initializes the broadcast reception channel. A bidirectional communication channel is established (517), and in case of failure, the failure reason is reported to the user (521).

If the message received from the service gateway system to the user terminal block is a control information message (518), a disconnection message is received (519), the bidirectional channel is terminated (520), and the fact is reported to the user (521). ).

If the message received from the service gateway system to the user terminal block is multimedia data (522), the multimedia data is extracted from the MPEG transport stream and reconfigured to the state before splitting (523). The reconstructed packet is processed 524 in the protocol processing block and then forwarded to the application software via the standard API (525).

The common channel hiding using random numbers may use a plurality of common channels that can be commonly used by the service gateway and the user terminal, and may use a method in which only one TID is used as a random number. This method designates a common channel that can be received by the user terminal itself when requesting the connection of the user terminal, and is used only temporarily for receiving a connection confirmation message and channel information. When multiple user terminals simultaneously request the same channel, there is a possibility of requesting the same channel. Therefore, additional address information for identifying the terminal is used in addition to the common channel information. This is to prevent the request channel from overlapping, and since this alone cannot completely eliminate the duplication, the user information is identified using the account information. Account information is encrypted to prevent exposure.

The connection control block of the service gateway uses the proposed common channel when the user terminal requests a connection when generating a connection confirmation packet, and transmits the information on the broadcasting network transmission channel for the point-to-point communication channel configuration to be used by the user terminal through the transmission control block. To pass. If there is no available point-to-point configuration channel or there is an error in the user information, the connection impossible message is transmitted using the common channel suggested by the terminal in the same way as the connection confirmation.

The reception of control information 518 and the reception of user data 522 for disconnection are performed using a point-to-point communication channel configured by the user terminal and the service gateway by using channel information obtained at the time of connection request.

6 is a structural diagram of a protocol stack applied to the present invention.

This is a protocol for showing the state of protocol conversion performed by each function module in the communication control device 113 when the multimedia server 610 and the user terminal 650 are connected to the Internet protocol through the service gateway system 110. Stack structure.

The broadcasting network interface 630 analyzes an Internet address and plays a role of loading the same on the unicast channel A1 in the broadcasting network with the corresponding user terminal 650. On the other hand, the return channel interface 640 serves to reconstruct the IP datagram from the individual subscriber station received from the return channel A2. In addition, the switch 620 connects the broadcasting network interface 630 and the multimedia server 610.

FIG. 7 is a diagram for explaining the structure of a control message applied to the present invention, and illustrates a method of configuring a unicasting channel A1 for transmitting an IP datagram through an MPEG-2 broadcasting network.

The IP packet 710 is treated as one Private Section (PS) 720, and the PS 720 is identified by a PID (Program Identifier) 731 and a TID (Table Identifier) 721. The PS 720 is divided into transport streams (TSs) 730, which are transport units, and may be distinguished from the start and end of the PSs by the PUSI (Payload Unit Start Indication, 732) of the consecutive TS 730 header parts. have. A PSUI 732 of 1 indicates the start of a new PS 720. Private Section Length (722) indicates the actual length of an IP datagram. This shows the length of the stuffing bytes 733 of the last TS.

8 is a view for explaining a connection control process of the Internet access channel according to the present invention.

When the user selects (801) the terminal station's Internet application, the terminal station requests (802) the connection to the service gateway. The service gateway examines the subscriber (803), and if the subscriber authentication succeeds, the service gateway allocates network resources that the requesting terminal can use as a transmission / reception channel (804). Check if the network resource allocation is possible (805), if not, notifies the terminal station that the connection has failed (806), and the terminal station receiving the announcement broadcasts the connection failure to the user (807). If the allocation is possible, the return channel receiver of the service gateway is initialized to enable reception (808). At the same time, it informs the terminal station that the connection is successful (809), when the terminal station receives it, initializes the return channel (810), and initializes the reception channel through the broadcast network (811). The user is then notified that the connection was successful (812).

In this state, the user of the terminal station can freely communicate with hosts on the Internet through the application program (813). If the user stops the application program and wants to disconnect (814), the terminal station requests to disconnect (815) to the service gateway, and the service gateway releases the broadcast channel related resources (816). In addition, the return channel receiver allocated for the return channel is released (817), and the terminal station is informed of the disconnection (818). After receiving the disconnection, the terminal station releases the transmission channel (819), releases the reception broadcast channel (820), and informs the user of the completion of the disconnection (821).

9 is a diagram for describing a state of a terminal station according to a connection control process.

The READY state 910 is a state in which power is turned on and a state in which a common signal provided from the service gateway is received and no connection is maintained. At this time, when a user's connection request comes in, the service is driven and transitions to the CONNWAIT 920 state that requested the connection request. At this time, when a connection failure message or a predetermined time passes, the state transitions back to the READY (910) state, and when a response indicating a successful connection is received, the transmission and reception channel is initialized and the state changes to the SERVICE 940 state. If the service is canceled in the CONNWAIT (920) state, the transition to the RESWAIT (930) state waits for a connection response. When a predetermined time elapses in the RESWAIT 930 state or when a connection failure message is received, the terminal immediately changes to the READY 910 state. However, when a response indicating a successful connection is received, the terminal requests a disconnection and transitions to the DISCONWAIT 950 state. In the SERVICE 940 state, normal communication is performed through the Internet, and when the cancellation of the service is requested, the connection is requested to the service gateway and the state transitions to the DISCONWAIT 950 state. In the DISCONWAIT (950) state, when the disconnection response is turned on or a certain time elapses, all the transmit and receive channels are released and then the state is changed to the READY (910) state.

10 (a) and 10 (b) are diagrams for explaining the request message format and the response message format.

FIG. 10 (a) shows a request message format, which is composed of a 2-byte MSG_ID (Message Identifier) 1010 and a parameter, and the parameter is used with a variable length according to the MSG_ID (Message Identifier 1010).

10 (b) shows a response message format. MSG_ID (Message Identifier) 1030 is composed of 2 bytes, and Rslt (Result Code, 1040) is allocated 1 byte. The parameter is used with a variable length according to the MSG_ID 1030.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited.

As described above, the present invention proposes a point-to-point interactive communication channel configuration method as a method for configuring an asymmetric broadcast communication network so that a user terminal can access the Internet by using a channel, and a concrete method for implementing the same In order to overcome the difficulty of protecting user information due to the public nature of the broadcasting network, we proposed a scheme to avoid the exposure of common information in response to malicious information stealing by using a random number of common channels. In addition, a protocol structure for providing Internet access services in a broadcasting / communication integrated network and a connection control method for establishing, maintaining, and canceling communication channels through a broadcasting network are presented. This method is expected to contribute to the activation of communication services through the broadcasting network by proposing a way to economically implement the Internet access service before the introduction of various communication services using the broadcasting network. This method can also be effectively applied to digital broadcasting networks such as satellite networks and CATV networks.

Claims (6)

In the broadcast / communication integrated system for providing Internet access services based on the MPEG-2 digital broadcasting network, A service gateway system connected to a broadcasting network access terminal apparatus having a transmission / reception capability and a broadcasting system to control communication, and independently communicating with each terminal apparatus; And a user terminal block generating random numbers in a predetermined range and transmitting them to the service gateway upon request of channel setting. The method of claim 1. The service gateway system includes a broadcast control device for multiplexing and controlling a broadcast program and a communication channel; And a central station communication control device for controlling the reception through the talk channel and the transmission through the broadcast network to interoperate with each other. The method of claim 2, The communication control apparatus includes a return channel interface block for receiving a signal from the user terminal block, separating a control signal and user data from the received signal, and packetizing user data; A user authentication block for determining whether the user terminal block is allowed in the connection establishment process of the user terminal block; A transmission control block for analyzing a user packet address and performing a conversion function for embedding the packet into a logical link to an assigned user terminal of a broadcasting network; Establishment and termination of communication paths according to request messages transmitted through the return channel interface block, management of information regarding allocation, maintenance and termination of individual channels, validation of common channels, users received from the return channel interface block A connection control block for delivering data packets to an information server or the Internet; An information server interface block for converting and forwarding user data packets; A switch block for transferring user data input through the connection control block according to a packet destination address; A communication network interface block for converting and transmitting the user data packet and the protocol of the communication network; A proxy block for performing a connection with a host on the Internet on behalf of the user terminal, and transmitting the connection result to the user terminal; Broadcast / Internet access in MPEG-2 digital broadcasting network, characterized in that it comprises a broadcast network interface block for outputting the MPEG transmission stream packet created in the transmission control block to the broadcast transmission device according to the interface specification of the broadcast transmission device. Communication integration system. The method of claim 1, The user terminal block includes application software, And a terminal communication control device for interfacing different communication media or channels of the MPEG-2 digital broadcasting network and the return channel with the application software as a bidirectional communication channel. Possible broadcast / communication integration system. The method of claim 4, wherein The communication control apparatus receives the information required for maintaining the bidirectional communication channel from the service gateway system, sets up a reception channel of the broadcast reception block, maintains and manages initialization information for network access of the talk channel transmission block, and broadcast channel and chat channel. A connection control block for performing a function of controlling establishment, maintenance, and termination of a connection to configure a bidirectional communication channel through A communication channel interface block for interworking with a service gateway system through various standard protocol processing blocks, and performing a communication function between the connection control block, the conversation channel transmission block, and the broadcast reception block; A broadcast / communication integrated system capable of accessing the Internet in an MPEG-2 digital broadcasting room, which is connected through an application software and an application protocol interface and comprises a protocol processing block for changing a broadcast reception channel according to the application software. Requesting a connection to a service gateway as the user selects an Internet application as a terminal station; If the subscriber authentication is successful by authenticating the subscriber at the service gateway, the requesting terminal allocates a transmission / reception channel; Checking whether network resource allocation is possible through the allocated transmission / reception channel, and notifying the terminal station that the connection fails if the allocation is not possible, and the receiving terminal station notifies the user of the connection failure; Initializing the return channel receiver of the service gateway to enable reception, and informing the terminal station that the connection is successful if network resource allocation is possible through the allocated transmission / reception channel; The terminal station receiving the connection success message initializes the return channel, initializes the reception channel through the broadcasting network, and informs the user that the connection is successful. The user of the terminal station communicating with the hosts on the Internet through an application program; If the user interrupts the application to request disconnection, the terminal station requests to disconnect from the service gateway; After the service gateway releases the broadcast channel related resources and the return channel receiving device, notifying the terminal station of the release; The terminal station receiving the disconnection releases the transmission channel and releases the reception broadcast channel, and then notifies the user of the completion of the disconnection. Method of controlling connection in a communication system.