KR100560746B1 - Apparatus and method for providing broadcast service based on wireless LAN - Google Patents

Abstract

The present invention relates to an apparatus for providing a broadcast service based on a wireless LAN, and a method of providing the same. The present invention relates to a channel control message exchanged between a wireless terminal receiving a wireless service through a wireless LAN and a set-top box providing a broadcast service. By definition, the user can be provided with a broadcast service through the wireless terminal, and by defining a channel control message exchanged between the wireless terminal and the set-top box as a simplified message, to improve the efficiency of the use band of the WLAN will be.

In addition, a user can select a channel program of a broadcast service through a wireless terminal.

Description

Apparatus for providing a broadcast service based on a wireless LAN and a method for providing the same {method and apparatus of offer broadcasting service using Wireless LAN}             

1 is a block diagram illustrating a configuration of an apparatus for providing a broadcast service based on a wireless LAN according to the present invention.

Figure 2 is an internal block diagram for explaining the configuration of a set-top box according to an embodiment of the present invention.

3 is a view for explaining a message table according to an embodiment of the present invention.

4 is an internal block diagram illustrating a configuration of a wireless terminal according to a preferred embodiment of the present invention.

5 is a view for explaining the structure of a message according to a preferred embodiment of the present invention.

6 is a flowchart illustrating a flow of a channel control message according to a general DSM-CC standard.

7 is a flowchart illustrating a flow of a channel control message exchanged between a set-top box and a wireless terminal according to an embodiment of the present invention.

8A and 8B are flowcharts illustrating a flow of a method for receiving a broadcast service by a wireless terminal according to a preferred embodiment of the present invention.

9A, 9B, and 9C are flowcharts for explaining the flow of a method of providing a broadcast service by a set-top box to a wireless terminal according to a preferred embodiment of the present invention.

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

10: Optical Line Terminator (OLT) 20: Broadcast Server

30: Set Top Box (Set_top-Box: STB)

31: xDSL / FTTH / Ethernet Interface

32: control unit 32a: message processing unit

33: memory 33a: message table

34: Ethernet interface unit 35: wireless interface unit

36: wired interface unit 40: wireless terminal

41; Wireless Interface Module 42: Central Processing Unit

42a: message processing module 43: keypad

44: storage unit 45: video / audio output unit

50: wired terminal 60: TV (TeleVision)

The present invention relates to an apparatus for providing a broadcast service based on a wireless LAN and a method of providing the same. More particularly, the present invention relates to a broadcast service in which a wireless terminal is connected to a set-top box and a wireless LAN. Apparatus for providing a broadcast service based on a wireless LAN to improve the efficiency of use of wireless LAN resources by defining a channel control message for providing a broadcast service, each message ID (message ID) for providing a broadcast service and its provision It is about a method.

In general, a set-top box (STB) refers to a home communication terminal required to use a next generation interactive multimedia communication service (so-called interactive TV) such as video on demand (VOD), video home shopping, and network game.

It is connected to a network such as an interactive TV or a video transmission service of a telephone company (eg, a video dial tone provided by a local telephone company), and is connected to a TV monitor in a home. The set-top box has a function of receiving and converting video signals as a basic function, in addition to a function of communicating with a video server or the like installed in a telephone company or a comprehensive cable broadcasting (CATV) station.

Video and audio data for digital broadcast is compressed into Moving Picture Experts Group 2 (MPEG2) and multiplexed in the form of transport streams (xDSL) or fiber-to-the home (FTTH) and Ethernet (FTTH). In this case, xDSL is classified into an Asymmetric Digital Subscriber Line (ADSL), a High Bit Rate DSL (HDSL), and a Very High Data Rate DSL (VDSL).

Video on Command (VOD) includes Internet VOD that allows viewing of VOD content on the Internet with Window Media Player or Real Player. Also, Moving Picture Experts Group (MPEG) 2 VOD There is.

These set-top boxes follow the Digital Storage Media Command and Control (DSM-CC) standard, which is an application to provide special operation and control for the bitstream of MPEG 1/2. Protocol.

Looking briefly at the DSM-CC standard, a video server is designed for VOD applications that require control by the client, and the session control protocol stack and the channel change protocol stack operate on top of each other. . That is, session control is based on Transmission Control Protocol (TCP) / User Datagram Protocol (UDP), and channel change control is operated based on ATM Adaption Layer (AAL) 5 / Asynchronous Transfer Mode (ATM).

In addition, the DSM-CC standard defines messages by assuming a client, a network (SRM: Session Resource Manager), and a server as three service objects, and most control messages use a confirmation method.

In the confirmation scheme, a request message is used when a client or a server starts a message, and the SRM responds to the request message with a confirm message.

In addition, the message sent to the client or the server by the SRM uses an indication message, and the client or server responds to the indication message with a response message.

Meanwhile, interest in wireless terminals such as mobile phones, personal digital assistants, and smart phones, which are provided with wireless services based on 11Mbps or 54Mbps wireless LANs such as 802.11 b / g / a. This is increasing.

Accordingly, interest in enabling the digital broadcasting provided by the set-top box to be viewed through the wireless terminal is also amplified.

However, the messages defined in the existing DSM-CC standard are signaling between user-to-network (UN) and user-to-user (UU) for VOD applications over the network. Since it is a base standard that considers all cases on the network, the DSM-CC standard is used to provide a digital broadcasting service between a wireless terminal, a set-top box, and a broadcasting server. I have the following problem.

First, the DSM-CC standard is a standard for VOD, so when introduced into a three-top box, the three-top box becomes a client. Therefore, in order to connect a wireless terminal to the set top box via a wireless LAN, the wireless terminal must be a client of the set top box, and thus a new message that can communicate between the two objects must be defined.

Second, in the related art, when using a network-based set-top box, a broadcast can be watched only through a digital TV. Therefore, a method of watching a digital broadcast through a wireless terminal in a place without a TV should be sought.

Third, while conventionally, TV broadcasts can be viewed using a wireless terminal with a built-in TV tuner, but the broadcast cannot be viewed using a wireless terminal on a network basis. That is, a method for watching digital broadcasting using a wireless terminal without a separate TV tuner has not been developed.

 Fourth, the DSM-CC standard defines a number of messages that consider all general cases on the network. Therefore, there is a need to define only a message for viewing a broadcast using a wireless terminal.

Fifth, since the capacity (byte number) of messages defined in the existing DSM-CC standard is large, if applied to the wireless LAN section connected to the wireless terminal as it is, there is a problem that a lot of restrictions on the radio channel resources.

Accordingly, the present invention has been made to solve the above problems, by connecting a set-top box and a wireless terminal to a wireless LAN, to provide a broadcast service to the wireless terminal, the wireless terminal is used as a client of the set-top box By defining a new message and minimizing the capacity (bytes) of the defined message, maximizing the efficiency of using the channel band of the wireless LAN, the user can be provided with a digital broadcasting service using a wireless terminal An object of the present invention is to provide an apparatus for providing a broadcast service based on a wireless LAN and a method of providing the same.

An apparatus for providing a broadcast service based on a wireless LAN according to the present invention according to an aspect of the present invention for achieving the above object, and stores a message ID and a channel control message corresponding to the message ID and And a wireless terminal for generating a control message including a message ID corresponding to a channel control message generated according to a user's selection, transmitting the generated control message to a broadcast server, and establishing a broadcast session according to a response message received from the broadcast server; and store the channel control message corresponding to the message ID, search for the type of channel control message corresponding to the message ID included in the control message received from the wireless terminal, and broadcast the corresponding channel control message. Message corresponding to the response channel control message received from the broadcast server. By sending a control message including an ID to a wireless terminal, a set-top box to set up the broadcast session between broadcast server and the wireless terminal.
According to an aspect of the present invention, there is provided a wireless terminal comprising an input module for providing an input signal according to a user's selection, a message storage module for storing a message ID, a channel control message corresponding to the message ID, and an input module. A channel control message is generated according to the received input signal, the message ID corresponding to the generated channel control message is searched by the message storage module, and the control message including the searched message ID is transmitted to the broadcast server through the set-top box. Transmits, establishes a broadcast session, and when a control message including a message ID is received from the set-top box, searches for a channel control message corresponding to the message ID, and sends a message ID corresponding to a response message to the searched channel control message. Message processing module for transmitting a control message to the set-top box, and Each control message including the message ID generated by the message processing module is transmitted to the set-top box through a wireless LAN, and the wireless receiver receives the control message and the broadcast data including the message ID from the set-top box through the wireless LAN. And a video / audio output module for outputting a video / audio signal corresponding to broadcast data received through the wireless LAN interface module so that a user can view it.
When the wireless terminal according to the present invention receives the remote control switch key signal from the input module, the wireless terminal determines whether the wireless terminal is set to the remote control mode. If the wireless terminal is set to the remote control mode, the wireless terminal releases the remote control mode and the wireless terminal controls the remote control. If not set to the mode, the remote control mode further comprises a remote control mode processing module for transmitting a channel selection key signal received from the input module to the set-top box.
The set-top box according to the present invention includes a message ID, a message storage unit for storing a channel control message corresponding to the message ID, and a channel control corresponding to the message ID included in the control message received from the wireless terminal. The message is searched by the message storage unit, transmitted to the broadcast server, the message ID corresponding to the channel control message received from the broadcast server is searched by the message storage unit, and the control message including the corresponding message ID is transmitted to the wireless terminal. A message transmitter configured to establish a broadcast session between the wireless terminal and the broadcast server, a control unit for transmitting broadcast data received from the broadcast server to the wireless terminal when the wireless terminal and the broadcast server establish a broadcast session in the message transmitter; Exchange control messages with the terminal via wireless LAN The broadcast data provided and includes a wireless LAN interface for transmitting to a wireless terminal.
When the broadcast data is received from the broadcast server, the set-top box according to the present invention may include: a decoding unit for decoding the received data, and parsing the broadcast data decoded by the decoding unit to broadcast the channel program requested by the wireless terminal. The apparatus may further include a data transmitter for checking whether the data is the data and transmitting the broadcast data to the wireless terminal if the broadcast data is broadcast data of the channel program.
An apparatus for providing a broadcast service based on a wireless LAN according to another aspect of the present invention may store a session control message corresponding to a channel control message defined in the Digital Storage Media Command and Control (DSM-CC) standard, and Optionally, a wireless terminal for providing a session control message corresponding to a channel control message to a set-top box via a wireless LAN, and receiving broadcast data through a broadcast session established with a broadcast server according to the session control message; Storing a channel control message corresponding to the session control message, transmitting a channel control message corresponding to the session control message received from the wireless terminal to the broadcasting server, and wirelessly transmitting the session control message corresponding to the channel control message received from the broadcasting server. Transmits to the terminal, establishes a broadcast session between the broadcast server and the wireless terminal, and through the broadcast session And a set-top box for transmitting the broadcast data to the transmission server provided in the wireless terminal through the wireless LAN.
According to another aspect of the present invention, there is provided a method for providing a broadcast service based on a wireless LAN, comprising: setting a channel control message and a message ID corresponding to a channel control message in a wireless terminal and a set-top box, and a user of the wireless terminal. Generating a control message including a message ID corresponding to a channel control message generated according to the selection of the message, and transmitting the control message to the set-top box via a wireless LAN; and setting the control message to a control message received from the wireless terminal. Identifying and transmitting a channel control message corresponding to the included message ID to the broadcast server, and when a response message for the channel control message is received from the broadcast server, wirelessly transmits a control message including the message ID corresponding to the response message. Transmitting to a terminal, setting a broadcast session between the broadcast server and the set-top box, and When a box is set with a broadcast server and a broadcast session with a wireless terminal, and broadcast data is provided from the broadcast server, confirming whether the broadcast data is broadcast data of a channel program requested by the wireless terminal; If the broadcast data is broadcast data of the corresponding channel program, transmitting the broadcast data to the wireless terminal through the wireless LAN.
In a method of providing a broadcast service based on a wireless LAN according to the present invention, when a user selects a remote control mode, it is determined whether the wireless terminal is currently set to a remote control mode, and as a result, the remote control mode is set. If it is present, canceling the set remote control mode, and if the remote control mode is not set, setting the remote control mode and setting an input mode for receiving broadcast data from the broadcast server.
In a method of providing a broadcast service based on a wireless LAN according to the present invention, if the channel control message corresponding to the message ID included in the control message received from the wireless terminal is set channel, the broadcast data is transmitted to the wireless terminal. Determining whether there is a margin of a channel to be transmitted; and a) if there is a margin of the channel, increasing the channel usage resource of the WLAN connected to the wireless terminal, transmitting broadcast data through the channel, and b) determining As a result, if there is no space in the channel, transmitting a channel error message to the wireless terminal, and when a session termination message is received from the wireless terminal or the broadcast server, the channel usage resource is reduced, and broadcast data transmission is interrupted. The method may further include terminating a broadcast session established between wireless terminals.
Hereinafter, an apparatus for providing a broadcast service based on a wireless LAN according to the present invention and a method of providing the same will be described in detail with reference to the accompanying drawings.

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1 is a block diagram illustrating a configuration of an apparatus for providing a broadcast service based on a wireless LAN according to the present invention.

Referring to FIG. 1, an apparatus for providing a broadcast service based on a wireless LAN includes an OLT 10 (Optical Line Terminator), a broadcast server 20, a set-top box 30 (STB), A wireless terminal 40, a wired terminal, and a TV 60 are included.

The wireless terminal 40 may correspond to a mobile phone, a personal digital assistant (PDA), a smart phone, and the like.

The OLT 10 converts broadcast data received from an analog broadcast network, its own digital broadcast network, a digital broadcast network, and a VOD / Internet network to be transmitted by an optical cable, and transmits the data to the broadcast server 20.

The broadcast server 20 is connected to the OLT 10 by an optical cable, converts the broadcast data received from the OLT 10 into MPEG data that can be transmitted by xDSL or FTTH and Ethernet, and the wireless terminal 40, Provided according to a request of a wired terminal and the like, the broadcast server 20 corresponds to an optical network unit (ONU).

At this time, the broadcast server 20 may be connected to the set-top box 30 by xDSL or FTTH and Ethernet.

Wired terminal 50 is connected to the set-top box 30 and the Ethernet (ethernet), and transmits the broadcast request signal to the set-top box 30, and outputs the broadcast data received accordingly, the user broadcast service via Ethernet To be provided.

The TV 60 is connected to the set top box 30 by an YPbPi line or an RGB line, and outputs the broadcast data provided from the set top box 30 so that a user can recognize it.

The wireless terminal 40 is connected to the set-top box 30 through a wireless LAN (802.11x), transmits a broadcast request signal to the set-top box 30, and outputs the broadcast data received by the user so that the user can recognize it. do.

2 is an internal block diagram for explaining the configuration of a set-top box according to an embodiment of the present invention.

Referring to FIG. 2, the set top box 30 includes an xDSL / FTTH / Ethernet interface unit 31, a control unit 32, a memory 33, an Ethernet interface unit 34, a wireless interface unit 35, and a wired interface unit. (36).

The xDSL / FTTH / Ethernet interface unit 31 receives broadcast data from the broadcast server 20 connected by xDSL or FTTH and Ethernet, and a channel control message is exchanged between the broadcast server 20 and the set-top box 30. Interface to do this.

In addition, the Ethernet interface unit 34 receives a channel control message from a wired terminal connected to Ethernet, and transmits broadcast data provided from the broadcast server 20 to the wired terminal. The interface between the set-top box 30 and the wired terminal 50 can exchange channel control messages.

The wireless interface unit 35 transmits broadcast data provided by the broadcast server 20 to the wireless terminal 40 connected to the wireless LAN (802.11x), and a channel between the wireless terminal 40 and the set-top box 30. Interface so that control messages can be exchanged.

The wired interface unit 36 transmits broadcast data to the TV 60 connected by the YPbPi line or the RGB line.

In addition, the message table 33a of the memory 33 stores a message defined in the existing DSM-CC standard and a corresponding message ID (ID).

That is, it stores the message ID of 1 byte and the DSM-CC standard message defined accordingly.

3 is a view for explaining a message table according to an embodiment of the present invention.

Referring to FIG. 3, the message table 33a defines a DSM-CC standard message type corresponding to each message ID.

That is, the 'ClientSessionSetupRequest' message that requests the client to establish a session to the server according to the DSM-CC standard is defined as the message ID '0x01', and the 'ClientSessionSetupConfirm' message, which is a response message to the 'ClientSessionSetupRequest' message to the client, Defined by message ID '0x81'.

When the request message is received from the wired terminal 50 or the wireless terminal 40, the controller 32 transmits the received request message to the broadcast server 20, and a response message received from the broadcast server 20. To the wired terminal 50 or the wireless terminal 40.

In addition, when an indication message is received from the broadcast server 20, the received indication message is transmitted to the wired terminal 50 or the wireless terminal 40, and the wired terminal 50 or the wireless terminal 40 is transmitted. ) Transmits the response message received from the broadcast server 20 to the broadcast server 20.

The control unit 32 receives a channel control message from the wired terminal 50 or the wireless terminal 40, stores the set channel number information in the memory 33, and broadcast data from the broadcast server 20. When it is received, it is determined whether the received broadcast data is data of a set channel, and if the broadcast data of the set channel is not, the broadcast server 20 requests the broadcast data retransmission.

In this case, the controller 32 may parse the received broadcast data, check a program ID, and check whether the received broadcast data is broadcast data of a set channel.

The message processing unit 32a of the control unit 32 determines the message ID received from the wireless terminal 40 through the air interface unit 35, and grasps the message of the DSM-CC standard according to the corresponding message ID, and identifies xDSL / The FTTH / Ethernet interface unit 31 transmits the message of the corresponding DSM-CC standard.

4 is an internal block diagram illustrating a configuration of a wireless terminal according to a preferred embodiment of the present invention.

Referring to FIG. 4, the wireless terminal 40 includes a wireless interface module 41, a central processing unit 42, a storage unit 44, a video / audio output unit 45, and a keypad 43.

The central processing unit 42 includes a message processing module 42a and the storage unit 44 includes a message table 33a.

The air interface module 41 receives broadcast data from the set-top box 30 through a wireless LAN (802.11x) and interfaces so that the message ID can be exchanged between the set-top box 30 and the wireless terminal 40.

The keypad 43 provides a key signal according to the key selected by the user. In this case, the keypad 43 includes a remote control switch button, a broadcast receiving button, a channel selection button, and a session end button. When the user selects the corresponding button, the keypad 43 provides a key signal accordingly.

The video / audio output unit 45 outputs video and audio information according to broadcast data received from the broadcast server 20 through the set-top box 30, so that a user provides a broadcast service through the wireless terminal 40. To receive it.

The central processing unit 42 decodes the received broadcast data so that the video / audio output unit 45 can output the video and audio according to the broadcast data received from the set-top box 30 through the air interface module 41. , To provide a display signal.

The message table 33a stores a message ID as shown in FIG. 3 and a message of the DSM-CC standard.

At this time, the message table 33a of the wireless terminal 40, the message ID stored in the message table 33a of the set-top box 30, and the message of the DSM-CC standard accordingly are preferably stored in the same manner.

When the message processing module 42a transmits a broadcast request signal to the set-top box 30 according to a key signal received from a keypad, the message processing module 42a may identify a type of a message of the DSM-CC standard according to the corresponding broadcast request signal. The message ID corresponding thereto is searched for in the message table 33a.

The message processing module 42a generates a channel control message including the searched message ID, and transmits the generated channel control message to the set-top box 30 through the air interface module 41, thereby broadcasting the server 20. And session are established.

In addition, the message processing module 42a searches the message table 33a for a message of the DSM-CC standard corresponding to the message ID of the channel control message received from the set-top box 30 through the air interface module 41.

In addition, the message processing module 42a generates a response message for the channel control message received from the set-top box 30, searches the message ID according to the corresponding response message in the message table 33a, and grasps the identified message. The channel control message including the message ID is transmitted to the set top box 30 through the air interface module 41.

5 is a view for explaining the structure of a channel control message according to a preferred embodiment of the present invention.

As shown in FIG. 5, the channel control message transmitted from the wireless terminal 40 to the set top box 30 is defined as 'Client2STB', and the channel control message transmitted from the set top box 30 to the wireless terminal 40. Is defined as 'STB2Client'.

In this case, 'sessionId' is a message type classification field used to distinguish a request message or a response message when transmitting a message, and may be used in increasing order from '0' to '255'.

In addition, 'messageId' is a message information field for displaying a message transmitted / received between the wireless terminal 40 and the set-top box 30, and defined as 1 byte to reduce the wireless bandwidth, and also to be easily understood by the developer. Corresponds to existing DSM-CC standard messages.

'requestProgramId' is a channel program information field of a channel program selected by the user, and 'clientId' and 'serverId' are MAC address information fields indicating MAC addresses of the wireless terminal 40 and the set-top box 30, respectively. This is used to authenticate each wireless terminal 40.

6 is a flowchart illustrating a flow of a channel control message according to a general DSM-CC standard.

Referring to FIG. 6, the set-top box 30 (STB) transmits a 'ClientSessionSetupRequest' message, which is a session establishment request message for establishing a session capable of receiving a broadcast service, to a network (SRM). (S 1).

When the SRM receives the 'ClientSessionSetupRequest' message from the set-top box 30, the SRM transmits a 'ServerSessionSetupIndication' message, which is a session setup request message, to the broadcast server 20 (S 2).

When the server 20 receives a 'ServerSessionSetupIndication' message from the SRM, the broadcast server 20 checks whether there is a session to be assigned to the set-top box 30, and if there is a session to be allocated, transmits a response message 'ServerSessionSetupResponse' to the SRM. (S 3).

When the SRM receives the 'ServerSessionSetupResponse' message from the broadcast server 20, the SRM transmits a 'ClientSessionSetupConfirm' message, which is a session establishment confirmation message, to the set-top box 30 (S 4).

When the session between the set-top box 30 and the broadcast server 20 is set, and the set-top box 30 wants to select a channel program provided from the broadcast server 20, the set-top box 30 sends a channel selection message. The 'ProgramSelectRequest' message is transmitted to the broadcast server 20 (S 5).

The broadcast server 20 grasps the 'ProgramSelectRequest' message received from the settub box, and transmits a 'ProgramSelectConfirm' message, which is a channel selection confirmation message of the corresponding channel program, to the set top box 30 (S6).

The broadcast server 20 transmits the broadcast information of the corresponding channel program to the set top box 30 according to the channel selection message received from the set top box 30.

On the other hand, when the broadcast server 20 wants to change the channel program provided to the set-top box 30, the broadcast server 20 transmits a 'ProgramSelectIndication' message, which is a channel selection message, to the set-top box 30 (S 7 ).

When the set-top box 30 receives the 'ProgramSelectIndication' message from the broadcast server 20, the set-top box 30 transmits a 'ProgramSelectResponse' message corresponding to the channel selection response message to the broadcast server 20 (S8).

The set top box 30 receives broadcast data of the changed channel program from the broadcast server 20.

Meanwhile, the set-top box 30 periodically transmits a 'ClientStatusRequest' message, which is a status information request message for requesting status information of the broadcast server 20, to the SRM in order to check the status of the broadcast server 20 (S 9). When receiving the 'ClientStatusRequest' message from the set-top box 30, the SRM transmits a 'ClientStatusIndication' message, which is a status information request message, to the broadcast server 20 (S 10).

When the 'ClientStatusIndication' message is received from the SRM, the broadcast server 20 generates a 'ClientStatusResponse' message, which is a response message containing status information, and transmits the message to the SRM (S 11), and the SRM sends a 'ClientStatusResponse from the broadcast server 20. 'Message is received, and transmits the' ClientStatusConfirm 'message containing the status information of the broadcast server 20 to the set-top box 30 (S 12).

Then, the set-top box 30 checks the status information of the broadcast server 20 contained in the received 'ClientStatusConfirm' message and checks the status of the broadcast server 20.

On the other hand, the broadcast server 20 periodically generates a 'ServerStatusRequest' message, which is a status information request message for requesting the status information of the set-top box 30, and transmits it to the SRM (S 13), and the SRM broadcast server 20 When the 'ServerStatusRequest' message is received from the 'ServerStatusIndication' message, which is a status information request message, is transmitted to the set-top box 30 (S 14).

When the set-top box 30 receives the 'ServerStatusIndication' message from the SRM, the set-top box 30 generates a 'ServerStatusResponse' message containing the status information and transmits it to the SRM (S 15), and the SRM receives the 'ServerStatusResponse' message from the set-top box 30. When received, a 'ServerStatusConfirm' message, which is a response message containing the status information of the set-top box 30, is transmitted to the broadcast server 20 (S 16).

The broadcast server 20 checks the status information of the set-top box 30 included in the received 'ServerStatusConfirm' message and checks the status of the set-top box 30.

In addition, when the set-top box 30 intends to terminate the session set up with the broadcast server 20, the session-termination request message 'ClientReleaseRequset' is generated and transmitted to the SRM (S 17), and the SRM is set-top box 30 When the 'ClientReleaseRequset' message is received from the Sx, the 'ClientReleaseIndication' message, which is the session termination request message, is transmitted to the broadcast server 20 (S18).

When the 'ClientReleaseIndication' message is received from the SRM, the broadcast server 20 transmits a 'ClientReleaseResponse' message, which is a response message of the session termination request message, to the SRM (S 19), and the SRM is a 'ClientReleaseResponse from the broadcast server 20. 'Message is received, by transmitting a' ClientReleaseConfirm 'message, which is a response message of the session termination request message, to the set-top box 30 (S20), the session established between the set-top box 30 and the broadcast server 20 ends.

On the other hand, when the broadcast server 20 wants to terminate the session established with the set-top box 30, it generates a 'ServerReleaseRequset' message, which is a session termination request message, and transmits it to the SRM (S 21), the SRM broadcast server 20 If the 'ServerReleaseRequset' message is received from the STS, the server sends a 'ServerReleaseIndication' message, which is a session termination request message, to the set-top box 30 (S22).

In addition, when the 'ServerReleaseIndication' message is received from the SRM, the set-top box 30 transmits a 'ServerReleaseResponse' message, which is a response message of the session termination request message, to the SRM (S 23), and the SRM is a 'ServerReleaseResponse from the set-top box 30. Message is received, the session termination confirmation message 'ServerReleaseConfirm' is transmitted to the broadcast server 20 (S 24), and the session established between the broadcast server 20 and the set-top box 30 is terminated.

7 is a flowchart illustrating a flow of a channel control message exchanged between a set-top box and a wireless terminal according to an embodiment of the present invention.

Referring to FIG. 7, the wireless terminal 40 receives broadcast data from the broadcast server 20 and generates a 'ClientSessionSetupRequest' message, which is a session setup request message, to set up a session for providing a broadcast service in a user. The message ID corresponding to the generated 'ClientSessionSetupRequest' message is searched for in the message table 33a.

In operation S30, the channel control message including the message ID '0x01' corresponding to the 'ClientSessionSetupRequest' message is transmitted to the set-top box 30 (STB).

The message processor 32a of the set-top box 30 searches the message table 33a for the types of messages corresponding to the message ID '0x01' included in the channel control message received through the air interface unit 35. Then, the searched message 'ClientSessionSetupRequest' message is transmitted to the broadcast server 20 (S 31).

When the broadcast server 20 receives the 'ClientSessionSetupRequest' message from the set-top box 30, the broadcast server 20 generates a 'ClientSessionSetupConfirm' message, which is a response message, and transmits the message to the set-top box 30 (S 32).

The message processor 32a of the set-top box 30 searches for a message ID corresponding to the 'ClientSessionSetupConfirm' message received from the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31 in the message table 33a. .

In addition, a channel control message including a message ID '0x81' according to the search result is generated and transmitted to the wireless terminal 40 through the wireless interface unit 35 (S 33).

The message processing module of the wireless terminal 40 searches for a message corresponding to the message ID of the channel control message received from the set top box 30 in the message table 33a.

In addition, since the channel control message received from the set-top box 30 is a 'ClientSessionSetupConfirm' message, the wireless terminal 40 establishes a session with the broadcast server 20 through the set-top box 30.

On the other hand, when a session between the wireless terminal 40 and the broadcast server 20 is set, and the user selects a channel program through the keypad 43 of the wireless terminal 40, the message processing module ( 42a) generates a channel selection message containing channel selection information according to the key signal received from the keypad 43, and sets the channel control message including the message ID '0x02' corresponding to the generated message to the set top box 30 (S 34).

In this case, the channel selection information may be included in the channel program information field which is the 'requestProgramIP' area of the channel control message, and the message type information may be included in the message type classification field which is the 'messageID' area.

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x02' included in the channel control message received through the air interface unit 35 in the message table 33a, and the corresponding message. The 'ProgramSelectRequest' message is transmitted to the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31 (S 35).

When the 'ProgramSelectRequest' message is received from the set top box 30, the broadcast server 20 generates a 'ProgramSelectConfim' message, which is a response message thereto, and transmits the message to the set top box 30 (S 36).

The message processor 32a of the set-top box 30 searches for a message ID corresponding to the 'ProgramSelectConfim' message received from the broadcast server 20 in the message table 33a, and includes a channel including '0x82' as the corresponding message ID. The control message is generated and transmitted to the wireless terminal 40 through the wireless interface unit 35 (S 37).

The broadcast server 20 provides broadcast data of a channel program that is changed according to a channel selection message received from the wireless terminal 40.

On the other hand, when the broadcast server 20 wants to change the channel program, the broadcast server 20 generates a 'ProgramSelectIndication' message, which is a channel selection message, and transmits it to the set-top box 30 (S 38).

The message processor 32a of the set-top box 30 searches for a message ID corresponding to the received 'ProgramSelectIndication' message in the message table 33a, and generates a channel control message including the corresponding message ID '0x83'. It transmits to the wireless terminal 40 through the wireless interface unit 35 (S 39).

The message processing module 42a of the wireless terminal 40 searches for a message corresponding to the message ID '0x83' included in the received channel control message in the message table 33a, and receives the message from the set top box 30. Check and generate a response message accordingly.

The message processing module 42a searches for the message ID corresponding to the generated response message in the message table 33a, generates a channel control message including the corresponding message ID '0x03', and sets the box. Transfer to (S 40).

The message processing unit 32a of the set-top box 30 searches for a message corresponding to the message ID '0x03' included in the channel control message received from the wireless terminal 40 in the message table 33a, and the searched message. The 'ProgramSelectResponse' message is transmitted to the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31 (S 41).

The broadcast server 20 provides the broadcast data of the changed channel program when the 'ProgramSelectResponse' message, which is a response message of the channel selection message, is received from the set top box 30.

In addition, the wireless terminal 40 periodically generates a status information request message requesting status information of the broadcast server 20, and searches for a message ID corresponding to the generated status information request message in the message table 33a. In operation S 42, a channel control message including a corresponding message ID '0x04' is generated and transmitted to the set top box 30.

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x04' included in the channel control message received from the wireless terminal 40 in the message table 33a, and the message ' The ClientStatusRequest 'message is transmitted to the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31 (S 43).

When the broadcast server 20 receives the 'ClientStatusRequest' message, the broadcast server 20 generates a 'ClientStatusConfirm' message, which is a response message containing its status information, and transmits it to the set-top box 30 (S 44). The message processor 32a searches the message ID corresponding to the received 'ClientStatusConfirm' message in the message table 33a to generate a channel control message including the corresponding message ID '0x84', and generates the channel control message. The state information is loaded in the 'status' area and transmitted to the wireless terminal 40 through the wireless interface unit 35 (S45).

The wireless terminal 40 checks the state of the broadcast server 20 using the state information of the broadcast server 20 included in the channel control message received from the set top box 30.

On the other hand, the broadcast server 20 periodically generates a 'ServerStatusIndication' message, which is a status information request message for requesting status information of the wireless terminal 40, and transmits it to the set-top box 30 (S 46). The message processing unit 32a of 30) searches a message ID corresponding to the received 'ServerStatusIndication' message in the message table 33a, generates a channel control message including the corresponding message ID '0x85', and generates the generated message. The channel control message is transmitted to the wireless terminal 40 (S 47).

The message processing module 42a of the wireless terminal 40 searches for a message corresponding to the message ID '0x85' included in the channel control message received from the set top box 30 in the message table 33a, and responds to the message. A response message containing its information is generated, and a message ID corresponding to the generated response message is searched for in the message table 33a.

In addition, a channel control message including the corresponding message ID '0x05' is generated and transmitted to the set top box 30 (S 48).

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x05' included in the channel control message received from the wireless terminal 40 in the message table 33a, and the message ' ServerStatusResponse 'message is transmitted to the broadcast server 20 (S 49).

At this time, the 'ServerStatusResponse' message includes the status information of the wireless terminal 40, and the broadcast server 20 checks the status of the wireless terminal 40 by using the 'ServerStatusResponse' message received from the set-top box 30. do.

On the other hand, when the wireless terminal 40 wants to end the session established with the broadcast server 20, that is, the user selects the session end button of the keypad 43, and the user wants to end the session established with the broadcast server 20. In this case, the session termination request message is generated, the message ID corresponding to the generated message is searched in the message table 33a, and a channel control message including the corresponding message ID '0x06' is generated and the set-top box 30 (S50).

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x06' included in the channel control message received from the wireless terminal 40 in the message table 33a, and the message ' The ClientReleaseRequest 'message is transmitted to the broadcast server 20 (S 51).

In addition, the broadcast server 20 generates a 'ClientReleaseConfirm' message, which is a response message to the received 'ClientReleaseRequest' message, and transmits the generated message to the set-top box 30 (S 52), and the set-top box 30 broadcast server 20. Search for the message ID corresponding to the 'ClientReleaseConfirm' message received from the message table 33a, generate a channel control message including the message ID '0x86', and transmit the generated message to the wireless terminal 40 (S). 53).

The message processing module 42a of the wireless terminal 40 searches for a message corresponding to the message ID '0x86' received from the set top box 30 in the message table 33a, and responds to the corresponding session termination request message. The message is checked and the session established with the broadcast server 20 through the set top box 30 is terminated.

On the other hand, when the broadcast server 20 wants to terminate the session established with the wireless terminal 40, the broadcast server 20 generates a 'ServerReleaseIndication' message, which is a session termination request message, and transmits it to the set-top box 30 ( S 54).

The message processor 32a of the set-top box 30 searches for a message ID corresponding to the 'ServerReleaseIndication' message received from the broadcast server 20 in the message table 33a, and includes a channel including '0x87' as the corresponding message ID. The control message is generated and transmitted to the wireless terminal 40 through the wireless interface unit 35 (S 55).

The message processing module 42a of the wireless terminal 40 searches for a message corresponding to the received message ID '0x87' in the message table 33a, checks the session termination request message as the corresponding message, and requests the session termination. The response message of the message is generated, and the message ID corresponding to the generated response message is searched in the message table 33a.

The wireless terminal 40 generates a channel control message including the message ID '0x07' searched from the message table 33a and transmits the generated channel control message to the set top box 30 (S56).

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x07' included in the received channel control message in the message table 33a and broadcasts the corresponding message 'ServerReleaseResponse'. The server 20 transmits the data to the server 20 (S 57).

In addition, the broadcast server 20 checks the received 'ServerReleaseResponse' message and terminates the session established with the wireless terminal 40 through the set-top box 30.

At this time, the message ID exchanged between the wireless terminal 40 and the set-top box 30 may be in UDP format, and the message exchanged between the set-top box 30 and the broadcast server 20 may be in TCP format.

8A and 8B are flowcharts illustrating a flow of a method for receiving a broadcast service by a wireless terminal according to a preferred embodiment of the present invention.

8A and 8B, the central processing unit 42 of the wireless terminal 40 determines whether a remote control switch key signal is received from the keypad 43 (S60).

That is, the central processing unit 42 determines whether the remote control switch key signal is received from the keypad 43 by the user selecting the remote control switch button of the keypad 43.

As a result of the determination, if the remote control switch key signal is not received from the keypad 43, the wireless terminal 40 performs the normal function (S 61). That is, when the wireless terminal 40 is a wireless telephone, a call is set up with another telephone according to the user's selection, and the wireless telephone service is provided to the user.

Meanwhile, when the remote control switch key signal is received from the keypad 43, the central processing unit 42 determines whether the wireless terminal 40 is currently set to the remote control mode (S 62). That is, the user has already selected the remote control telephone button of the keypad 43, and it is determined whether or not the wireless terminal 40 is currently set to the remote control mode to perform the wireless remote control function.

As a result of determination, if the wireless terminal 40 is already set to the remote control mode, the remote control mode of the wireless terminal 40 is released (S 63), while the current wireless terminal 40 is not set to the remote control mode, so that normal wireless If performing the function of the terminal 40, the wireless terminal 40 is set to the remote control mode (S 64).

Then, the central processing unit 42 selects the broadcast receiving button of the keypad 43, and determines whether the broadcast receiving key signal is received from the keypad 43 (S 65).

As a result of the determination, if the broadcast receiving key signal is not received from the keypad 43, the central processing unit 42 performs the remote control mode (S66). That is, when the channel selection key signal corresponding to the channel selection button selected by the user is received from the keypad 43, the channel selection signal according to the corresponding key signal is transmitted to the set top box 30.

On the other hand, when the broadcast reception key signal is received from the keypad 43, the central processing unit 42 sets the wireless terminal 40 to the broadcast reception mode (S 67).

The central processing unit 42 sets an input mode for receiving broadcast data from the broadcast server 20 (S 68). At this time, the central processing unit 42 sets the input mode to the xDSL mode or the fiber-to-the home (FTTH) mode in which the broadcast data is received from the broadcast server 20 according to a user's selection.

When the broadcast reception mode and the input mode are set, the wireless terminal 40 establishes a session with the broadcast server 20 through the set top box 30 (S 69).

That is, the wireless terminal 40 receives broadcast data from the broadcast server 20 and transmits a session establishment request message for setting up a session for providing a broadcast service to the broadcast server 20.

In this case, the message processing module of the wireless terminal 40 searches for a message ID corresponding to the generated session establishment request message in the message table 33a, and generates a channel control message including the corresponding message ID '0x01'. Transfer to the set-top box 30.

The message processor 32a of the set-top box 30 searches the message table 33a for a message corresponding to the message ID '0x01' included in the channel control message received through the air interface unit 35. When the message 'ClientSessionSetupRequest' is transmitted to the broadcast server 20, and the broadcast server 20 receives the 'ClientSessionSetupRequest' message from the set-top box 30, the broadcast server 20 sends a 'ClientSessionSetupConfirm' message, which is a response thereto, to the set-top box 30. To send).

The message processor 32a of the set-top box 30 searches for a message ID corresponding to the 'ClientSessionSetupConfirm' message received from the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31 in the message table 33a. .

A channel control message including a message ID '0x81' according to the search result is generated and transmitted to the wireless terminal 40 through the wireless interface unit 35.

In addition, a session between the wireless terminal 40 and the broadcast server 20 is established through the set top box 30.

When a session is established with the broadcast server 20, the wireless terminal 40 transmits a basic channel or previous channel request message to the broadcast server 20 (S 70), and receives the basic channel or the previous channel received from the broadcast server 20. The video and audio information according to the broadcast data of the channel program is output through the video / audio output unit 45 to provide a broadcast service.

In this case, the basic channel refers to a channel program that the broadcast server 20 initially accesses and provides for a user who receives a broadcast service. The previous channel refers to a user who receives a broadcast service using the wireless terminal 40. Refers to the channel program that was watched before the previous session ended.

Then, the central processing unit 42 of the wireless terminal 40 determines whether the channel selection key signal is received from the keypad 43 (S 71).

As a result of the determination, when the user selects the channel selection button of the keypad 43 and receives the channel selection key signal from the keypad 43, the central processing unit 42 performs the channel changing mode (S 72).

That is, when the user wants to change the channel program, the user selects a channel selection button of the keypad 43, and the message processing module of the wireless terminal 40 selects channel selection information according to a key signal received from the keypad 43. Generates a channel selection message loaded with a message, searches for a message ID corresponding to the generated message in the message table 33a, generates a channel control message including the message ID '0x02', and generates the channel control. Send a message to the set-top box (30).

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x02' included in the channel control message received through the air interface unit 35 in the message table 33a. The message 'ProgramSelectRequest' is transmitted to the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31.

When the 'ProgramSelectRequest' message is received from the set-top box 30, the broadcast server 20 generates a 'ProgramSelectConfim' message, which is a response message thereto, and transmits the message to the set-top box 30. The message processor 32a searches the message ID corresponding to the 'ProgramSelectConfim' message received from the broadcast server 20 in the message table 33a, and generates a channel control message including the corresponding message ID '0x82'. It transmits to the radio terminal 40 through the radio interface unit 35.

When the wireless terminal 40 checks the channel control message including the '0x82' message ID received from the set top box 30, the wireless terminal 40 changes the channel program provided with the broadcast data from the broadcast server 20.

Then, the broadcast server 20 performs a channel change according to the channel selection message received from the wireless terminal 40, and transmits the broadcast data of the changed channel to the wireless terminal 40 through the set-top box 30, The wireless terminal 40 receives broadcast data from the broadcast server 20 through the set top box 30 (S 73).

In addition, the wireless terminal 40 decodes broadcast data received from the set-top box 30 through the wireless interface module 41 and outputs video or audio information through the video / audio output unit 45 (S 74). ).

On the other hand, if the channel selection key signal is not received from the keypad 43, the central processing unit 42 of the wireless terminal 40 determines whether the user is requested to terminate the session through the keypad 43 (S 75). That is, the central processing unit 42 determines whether a session end key signal is received from the keypad 43.

As a result of the determination, when the session termination key signal is received, the central processing unit 42 ends the session established with the broadcast server 20 through the set top box 30 (S76).

That is, when the user of the wireless terminal 40 wants to end the session set up with the broadcast server 20, the message processing module 42a generates a session end request message, and the message ID corresponding to the generated message is a message. In search of the table 33a, a channel control message including the corresponding message ID '0x06' is generated and transmitted to the set top box 30.

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x06' included in the channel control message received from the wireless terminal 40 in the message table 33a, and the message ' ClientReleaseRequest 'message is transmitted to the broadcast server 20.

The broadcast server 20 transmits a 'ClientReleaseConfirm' message, which is a response message to the received 'ClientReleaseRequest' message, to the set-top box 30, and the set-top box 30 receives the 'ClientReleaseConfirm' received from the broadcast server 20. The message ID corresponding to the message is searched in the message table 33a to generate a channel control message including the message ID '0x86' and transmits the message to the wireless terminal 40.

The message processing module 42a of the wireless terminal 40 searches for a message corresponding to the message ID '0x86' included in the channel control message received from the set-top box 30 in the message table 33a, and retrieves the corresponding message. After confirming, the session established with the broadcast server 20 through the set-top box 30 is terminated.

On the contrary, if the session end key signal is not received from the keypad 43, the central processing unit 42 of the wireless terminal 40 periodically checks whether a status information request message for requesting status information from the broadcast server 20 is received. It is determined (S 77).

As a result of the determination, when the status information request message is received from the broadcast server 20, the central processing unit 42 generates a response message containing the status information and transmits the response message to the broadcast server 20 (S 78).

That is, the broadcast server 20 periodically generates a 'ServerStatusIndication' message requesting status information of the wireless terminal 40, transmits the message to the set top box 30, and the message processor 32a of the set top box 30 The message ID corresponding to the received 'ServerStatusIndication' message is searched in the message table 33a, and a channel control message including the corresponding message ID '0x85' is generated, and the wireless terminal 40 is transmitted through the air interface unit 35. To send).

In addition, the message processing module 42a of the wireless terminal 40 searches for a message corresponding to the message ID '0x85' included in the channel control message received from the set-top box 30 in the message table 33a. In response to the message, a response message containing status information is generated, and a message ID corresponding to the generated response message is searched in the message table 33a.

In addition, a channel control message including the corresponding message ID '0x05' is generated and transmitted to the set top box 30, and the message processing unit 32a of the set top box 30 controls the channel received from the wireless terminal 40. The message corresponding to the message ID '0x05' included in the message is searched in the message table 33a, and the message 'ServerStatusResponse' is transmitted to the broadcast server 20.

The broadcast server 20 checks the status of the wireless terminal 40 by using the status information contained in the 'ServerStatusResponse' message received from the set top box 30.

On the other hand, when the central processing unit 42 of the wireless terminal 40 does not receive the status information request message from the broadcast server 20, periodically generates a status information request message, which is a message for requesting the status information of the broadcast server 20. In step S79, the broadcast server 20 checks the state of the broadcast server 20 by using the response message.

That is, the wireless terminal 40 periodically generates a status information request message, which is a message for requesting the status of the broadcast server 20, and searches for a message ID corresponding to the generated status information request message in the message table 33a. In addition, a channel control message including a corresponding message ID '0x04' is generated and transmitted to the set top box 30.

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x04' included in the channel control message received from the wireless terminal 40 in the message table 33a, and the message ' ClientStatusRequest 'message is transmitted to the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31, and the broadcast server 20 transmits the status information of the' ClientStatusConfirm 'message, which is a response message to the received' ClientStatusRequest 'message. It generates, and transmits the generated response message to the set-top box 30.

The message processor 32a of the set-top box 30 searches for a message ID corresponding to the received 'ClientStatusConfirm' message in the message table 33a to generate a channel control message including the corresponding message ID '0x84'. It transmits to the radio terminal 40 through the radio interface unit 35.

In addition, the wireless terminal 40 searches for a message corresponding to the message ID included in the channel control message received from the set-top box 30 in the message table 33a, and uses the corresponding message to transmit the message to the broadcast server 20. Check the status information.

9A, 9B, and 9C are flowcharts illustrating a flow of a method of providing a broadcast service to a wireless terminal by a set-top box according to an exemplary embodiment of the present invention.

9A, 9B, and 9C, the control unit 32 of the set top box 30 (STB) determines whether a session establishment request message is received from the wireless terminal 40 (S80).

That is, it is determined whether the session establishment request message for establishing a session with the broadcast server 20 is received from the wireless terminal 40, and if the session establishment request message is not received, the set-top box 30 is connected to the YPbPi line or RGB. The broadcast data is transmitted to the TV 60 connected by the line (S 81).

At this time, if the wireless terminal 40 is set to the remote control mode, the control unit 32 broadcast data transmitted to the TV 60 in accordance with the channel selection signal received from the wireless terminal 40 through the wireless interface unit 35. Change the channel program.

On the other hand, when a session establishment request message is received from the wireless terminal 40, a session is established with the wireless terminal 40 and the broadcast server 20 (S 82).

That is, the wireless terminal 40 generates a session establishment request message, which is a message for establishing a session with the broadcast server 20, and searches for a message ID corresponding to the generated message in the message table 33a to search for the corresponding message ID. Transmit '0x01' to the set-top box 30.

The message processing unit 32a of the set-top box 30 searches for a message corresponding to the message ID '0x01' received through the air interface unit 35 and searches the message table 33a to broadcast a 'ClientSessionSetupRequest' message. Send to server 20.

When the 'ServerSessionSetupRequest' message is received from the set-top box 30, the broadcast server 20 generates a 'ClientSessionSetupConfirm' message, which is a response message, and transmits the message to the set-top box 30 through xDSL or FTTH and Ethernet.

The message processor 32a of the set-top box 30 searches for a message ID corresponding to the 'ClientSessionSetupConfirm' message received from the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31 in the message table 33a. .

A channel control message including a message ID '0x81' according to the search result is generated and transmitted to the wireless terminal 40 through the wireless interface unit 35.

In addition, a session between the wireless terminal 40 and the broadcast server 20 is established through the set top box 30.

The set top box 30 determines whether a channel selection message is received (S83).

As a result of the determination, when the channel selection message is received, it is determined whether there is a resource of a channel to be allocated to the wireless terminal 40 to which the session is established (S84). In step S85, a channel resource error message is transmitted.

On the other hand, if there is a resource of a channel to be allocated to the wireless terminal 40, it is determined whether the channel selection message is received from the wireless terminal 40 or from the broadcast server 20 (S86).

First, when the channel selection message is received from the broadcast server 20, the set-top box 30 transmits the channel selection message to the wireless terminal 40 (S 87).

That is, when a 'ProgramSelectIndication' message, which is a channel selection message, is received from the broadcast server 20, the message processing unit 32a of the set-top box 30 displays a message ID corresponding to the received 'ProgramSelectIndication' message in the message table 33a. The searcher generates a channel control message including the message ID '0x83' and transmits the generated channel control message to the wireless terminal 40 through the wireless interface unit 35.

On the other hand, when the channel selection message is received from the wireless terminal 40, the channel selection message is transmitted to the broadcast server 20 (S 88).

That is, the message processing module 42a of the wireless terminal 40 generates a channel selection message containing channel selection information according to a key signal received from the keypad 43 according to a user's selection, and corresponds to the generated message. The message ID is searched in the message table 33a to generate a channel control message including the corresponding message ID '0x02' and transmits the message to the set top box 30.

The message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x02' included in the channel control message received through the air interface unit 35 in the message table 33a. The message 'ProgramSelectRequest' is transmitted to the broadcast server 20 through the xDSL / FTTH / Ethernet interface unit 31.

The set top box 30 transmits a channel selection message to the broadcast server 20 or the wireless terminal 40 and determines whether a response message is received (S 89).

That is, the set-top box 30 determines whether a response message to the program selection request or the channel selection message transmitted to the wireless terminal 40 is received, which is a response message to the 'ProgramSelectRequest' message transmitted to the broadcast server 20. To judge.

As a result of the determination, when a response message to the channel selection message is received, it is determined whether broadcast data provided from the broadcast server 20 is received (S90), and the received broadcast data is decoded (S91).

That is, it decodes the broadcast data received in the MPEG method so that it can be transmitted through the WLAN.

Then, the program ID of the broadcast data received from the broadcast server 20 is identified to determine whether the received broadcast data is broadcast data of a changed channel program (S 92).

At this time, the control unit 32 stores the channel program information changed according to the channel selection message received from the wireless terminal 40 or the broadcast server 20, and is received through the xDSL / FTTH / Ethernet interface unit 31 By parsing the broadcast data, the program ID may be identified to determine whether the received broadcast data is broadcast data of a stored channel program.

As a result of the check, if the received broadcast data is broadcast data of a channel program to be changed, the use band resource of the managed WLAN is increased (S 93).

That is, the control unit 32 of the set-top box 30 manages use band resources of the wireless LAN connected to the wireless terminal 40, and when a new wireless channel is connected through the wireless terminal 40 and the wireless LAN, the used band Increase the resource, manage the use band of the WLAN.

The set top box 30 transmits the decoded broadcast data received from the broadcast server 20 to the wireless terminal 40 through the wireless LAN (S 94).

On the other hand, the set-top box 30 requests the status information from the wireless terminal 40 or the broadcast server 20 when the channel selection message is not received in a state where a session is established with the wireless terminal 40 and the broadcast server 20. It is determined whether a message is received (S 95).

That is, the message processing module of the wireless terminal 40 periodically generates a status information request message requesting the status information of the broadcast server 20, and sends a message ID corresponding to the generated status information request message to the message table 33a. Search), and generate a channel control message including the corresponding message ID '0x04' and transmit it to the set-top box 30.

The message processor 32a of the set-top box 30 determines whether a message ID '0x04' corresponding to the status information request message is received periodically from the wireless terminal 40.

In addition, the broadcast server 20 periodically generates and transmits a 'ServerStatusIndication' message, which is a status information request message requesting status information of the wireless terminal 40.

When the set top box 30 receives the status information request message from the wireless terminal 40 or the broadcast server 20, the set top box 30 transmits a message corresponding to the received status information request message to the broadcast server 20 or the wireless terminal 40. Transmit (S 96).

That is, when the message processing unit 32a of the set-top box 30 receives a channel control message including the message ID '0x04' corresponding to the status information request message from the wireless terminal 40, the message processing unit 32a corresponds to the received message ID. Message is searched in the message table 33a, and the message 'ClientStatusRequest' is transmitted to the broadcast server 20.

In addition, when the message processing unit 32a of the set-top box 30 receives the status information request message from the broadcast server 20, the message ID corresponding to the status information request message is searched in the message table 33a to search for the corresponding message. A channel control message including an ID '0x85' is generated and transmitted to the wireless terminal 40.

Then, the message processing unit 32a of the set-top box 30 checks whether a response message to the status information request message is received from the broadcast server 20 or the wireless terminal 40 (S 97), and the status information request message. When the response message is received, the message corresponding to the received response message is transmitted to the wireless terminal 40 or the broadcast server 20 (S 98).

That is, the message processing unit 32a of the set-top box 30 receives the 'ClientStatusRequest' message, which is the status information request message, by the broadcast server 20 and generates a 'ClientStatusConfirm' message containing the status information as a response message. When transmitting, the message ID corresponding to the received 'ClientStatusConfirm' message is searched in the message table 33a to generate a channel control message including the message ID '0x86' and transmits the message ID to the wireless terminal 40. .

At this time, the status information of the broadcast server 20 is loaded in the 'status' area of the channel control message.

The wireless terminal 40 receives the channel control message including the message ID '0x85', generates a response message containing the status information, searches for the message ID corresponding to the generated response message, and searches the corresponding message ID ' When the channel control message including '0x05' is transmitted, the message processor 32a of the set-top box 30 searches for a message corresponding to the message ID '0x87' of the received channel control message, and the message 'ServerStatusResponse' To the broadcast server 20.

At this time, the 'ServerStatusResponse' message contains the status information of the wireless terminal 40.

On the other hand, the set-top box 30 determines whether the session termination request message is received from the wireless terminal 40 or the broadcast server 20 (S 99).

That is, it is determined whether the message ID '0x06' corresponding to the session termination request message is received from the wireless terminal 40, and whether the 'ServerReleaseIndication' message, which is the session termination request message, is received from the broadcast server 20. To judge.

As a result of the determination, when the session termination request message is received, transmission of the broadcast data provided from the broadcast server 20 to the corresponding wireless terminal 40 is stopped (S100), and the use band resource of the managed WLAN is reduced. (S 101).

Then, the session established with the broadcast server 20 or the wireless terminal 40 ends (S 102), and the channel control message corresponding to the session termination request message is transmitted to the broadcast server 20 or the wireless terminal 40 ( S 103).

When the message processing unit 32a of the set-top box 30 receives the 'SeverReleaseIndication' message, which is a session termination request message, from the broadcast server 20, the message processing unit 32a displays a message ID corresponding to the received 'SeverReleaseIndication' message in the message table 33a. The searcher generates a channel control message including the message ID '0x87' and transmits the generated channel control message to the wireless terminal 40.

In addition, if the channel control message received from the wireless terminal 40 includes the message ID '0x06', the message processor 32a transmits the message 'ClientReleaseRequest', which is a message corresponding to the received message ID, to the broadcast server 20. send.

The message processor 32a of the set-top box 30 checks whether a response message to the session deletion request message is received from the wireless terminal 40 or the broadcast server 20 (S 103).

That is, if the message processing unit 32a of the set-top box 30 includes the message ID '0x87' in the channel control message received from the wireless terminal 40, the channel control message including the message ID '0x07' is received. Also, it is checked whether the 'ClientReleaseConfirm' message, which is a response message to the 'ClientReleaseRequest' message, is received from the broadcast server 20.

When the message processing unit 32a of the set-top box 30 receives a response message for the session termination request message from the broadcast server 20 or the wireless terminal 40, the message processing unit 32a receives a channel control message corresponding to the received response message. Transmit (S 105).

That is, when the message processing unit 32a of the set top box 30 receives the 'ClientReleaseConfirm' message from the broadcast server 20, the message ID corresponding to the received 'ClientReleaseConfirm' message is searched in the message table 33a, The channel control message including the message ID '0x86' is transmitted to the wireless terminal 40.

In addition, when the message processing unit 32a of the set-top box 30 receives the channel control message including the message ID '0x07' from the wireless terminal 40, the message processing unit 32a displays a message corresponding to the received message ID. Search for and transmits the corresponding message 'ServerReleaseResponse' to the broadcast server 20.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

As described above, according to the present invention, by defining a channel control message exchanged between a wireless terminal receiving a broadcast service through a wireless LAN and a set-top box providing a broadcast service through a wireless LAN, It is effective to receive a broadcast service.

In addition, there is an effect that a user can select a channel program provided with a broadcast service by using a wireless terminal.

In addition, by minimizing the capacity of the channel control message exchanged between the wireless terminal and the set-top box, there is an effect of maximizing the use band efficiency of the wireless LAN.

Claims (16)

Storing a message ID and a channel control message corresponding to the message ID, generating a control message including a message ID corresponding to a channel control message generated according to a user's selection, and transmitting the message to the broadcast server; A wireless terminal for establishing a broadcast session according to a response message received from the broadcast server; Stores a message ID and a channel control message corresponding to the message ID, searches for a type of channel control message corresponding to the message ID included in the control message received from the wireless terminal, and controls the corresponding channel. A set-top for providing a message to a broadcast server and transmitting a control message including a message ID corresponding to a response channel control message received from the broadcast server to the wireless terminal to establish a broadcast session between the broadcast server and the wireless terminal. Device for providing a broadcast service based on a wireless LAN including a box. The method of claim 1, wherein the channel control message, And at least one of a channel selection message, a session establishment request message, a session end message, a channel selection response message, and a session end response message. The method of claim 2, wherein the channel control message, And a message type classification field, a message information field, a channel program information field, and a MAC address information field. The method of claim 1, wherein the wireless terminal, An input module for providing an input signal according to a user's selection; A message storage module for storing a message ID and a channel control message corresponding to the message ID; The channel control message is generated according to the input signal received from the input module, the message ID corresponding to the generated channel control message is searched by the message storage module, and the control message including the searched message ID is set. By transmitting to the broadcast server through a box to set up a broadcast session, when a control message including a message ID is received from the set-top box, search for a channel control message corresponding to the message ID, and the searched channel control message A message processing module for transmitting a control message including a message ID corresponding to the response message to the set top box; Each control message including the message ID generated by the message processing module is transmitted to the set-top box through a wireless LAN, and the control message and broadcast data including the message ID from the set-top box through a wireless LAN. WiFi interface module for receiving the; And a video / audio output module configured to output a video / audio signal corresponding to broadcast data received through the wireless LAN interface module so that a user can watch. The method of claim 4, wherein the input module, Apparatus for providing a broadcast service based on a wireless LAN comprising at least one button of the remote control switch button, the broadcast receiving button, the channel selection button, the session setting button and the session end button. The method of claim 4, wherein When the remote control switch key signal is received from the input module, it is determined whether the wireless terminal is set to the remote control mode. If the wireless terminal is set to the remote control mode, the remote control mode is canceled and the wireless terminal is set to the remote control mode. If not, the apparatus for providing a broadcast service based on a wireless LAN, characterized in that it further comprises a remote control mode processing module for setting the remote control mode, and transmits the channel selection key signal received from the input module to the set-top box. The method of claim 1, wherein the set top box, A message storage unit for storing a message ID and a channel control message corresponding to the message ID; The channel storage message corresponding to the message ID included in the control message received from the wireless terminal is searched by the message storage unit, transmitted to the broadcast server, and the message ID corresponding to the channel control message received from the broadcast server is read. A message transmitter configured to search in a message storage unit, to transmit a control message including the corresponding message ID to the wireless terminal, and to establish a broadcast session between the wireless terminal and the broadcast server; A controller configured to transmit broadcast data received from the broadcast server to the wireless terminal when the wireless terminal and the broadcast server establish a broadcast session in the message transmitter; And a wireless LAN interface unit for exchanging a control message with the wireless terminal through a wireless LAN, and transmitting the broadcast data provided from the broadcasting server to the wireless terminal. Device that provides services. The method of claim 7, wherein A decoding unit for decoding the received data when broadcast data is received from the broadcast server; Parsing the broadcast data decoded by the decoding unit to determine whether the wireless terminal is broadcast data of a channel program requested, and if the broadcast data is broadcast data of the channel program, data to be transmitted to the wireless terminal. Apparatus for providing a broadcast service based on a wireless LAN, characterized in that further comprising a transmitter. Stores a session control message corresponding to a channel control message defined in the Digital Storage Media Command and Control (DSM-CC) standard, and, according to a user's selection, transmits a session control message corresponding to the channel control message according to a user's selection. A wireless terminal provided to the set-top box through a broadcast session through a broadcast session established with a broadcast server according to the session control message; And Storing a channel control message corresponding to the session control message, transmitting a channel control message corresponding to the session control message received from the wireless terminal to the broadcast server, and a session corresponding to the channel control message received from the broadcast server. A set-top box configured to transmit a control message to the wireless terminal, establish a broadcast session between the broadcast server and the wireless terminal, and transmit broadcast data provided by the broadcast server to the wireless terminal through a wireless LAN through the broadcast session. Apparatus for providing a broadcast service comprising. Setting a channel control message and a message ID corresponding to the channel control message in the wireless terminal and the set-top box; Generating, by the wireless terminal, a control message including a message ID corresponding to a channel control message generated according to a user's selection, and transmitting the generated control message to the set-top box through a wireless LAN; Identifying, by the set-top box, a channel control message corresponding to the message ID included in the control message received from the wireless terminal, and transmitting the same to the broadcast server; When a response message to the channel control message is received from the broadcast server, a control message including a message ID corresponding to the response message is transmitted to the wireless terminal to establish a broadcast session between the broadcast server and the set-top box. Doing; When the set-top box is a broadcast session with the broadcast server and the wireless terminal is set, and the broadcast data is provided from the broadcast server, to determine whether the broadcast data is broadcast data of the channel program requested by the wireless terminal step; And if the received broadcast data is broadcast data of a corresponding channel program, transmitting the broadcast data to the wireless terminal through a wireless LAN. The method of claim 10, When the user selects the remote control mode, it is determined whether the wireless terminal is currently set to the remote control mode, and as a result of the determination, if the remote control mode is set, the set remote control mode is canceled and the remote control mode is not set. If not, setting a remote control mode; And setting an input mode for receiving the broadcast data from the broadcast server. The method of claim 11, wherein the input mode, at least one of an xDSL mode for receiving the broadcast data through an xDSL line, an FTTH (fiber to the home) mode for receiving the broadcast data through an optical line, and an Ethernet mode for receiving broadcast data through an Ethernet Method for providing a broadcast service based on a wireless LAN, characterized in that. The method of claim 10, wherein the channel control message, And at least one of a channel selection message, a session establishment request message, a session termination message, a channel selection response message, and a session termination response message. The method of claim 13, wherein the channel control message, A method for providing a broadcast service based on a wireless LAN, the method comprising: at least one of a message type classification field, a message information field, a channel program information field, and a MAC address information field. The method of claim 10 or 13, If the channel control message corresponding to the message ID included in the control message received from the wireless terminal is a channel selection message, determining whether the channel for transmitting the broadcast data to the wireless terminal is available; a) as a result of the determination, if there is room in the channel, the channel usage resource of the wireless LAN connected to the wireless terminal is increased, and the broadcast data is transmitted through the channel; b) if it is determined that the channel is not available, transmitting a channel error message to the wireless terminal; When the session termination message is received from the wireless terminal or the broadcast server, reducing the channel usage resource, stopping the broadcast data transmission, and terminating the broadcast session established between the broadcast server and the wireless terminal. Method for providing a broadcast service based on a wireless LAN, characterized in that. The method of claim 10, wherein the determination of the broadcast data, Parsing the broadcast data to determine a program ID of the broadcast data, and determining whether the broadcast data is broadcast data of the channel program using the identified program ID. How to provide a broadcast service.

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