KR101365417B1 - System and method for providing iptv service - Google Patents

Abstract

When the multicast address of an IPTV channel received from a broadcaster is a multicast address requested by a mobile node through a tunnel, the end router of the IPTV service providing system may receive a temporary address of a mobile node corresponding to the multicast address of the IPTV channel. Address, CoA), the multicast address is set in the first header of the broadcast traffic, and the CoA of the mobile node is set in the second header of the broadcast traffic to transmit the broadcast traffic.

Description

IPTV service providing system and method {SYSTEM AND METHOD FOR PROVIDING IPTV SERVICE}

The present invention relates to an IPTV service providing system and method.

Multicast is a one-to-many communication, in which traffic is sent only to a specific group, and traffic can travel through routers at the perimeter of the local network. Therefore, in the conventional multicast-based Internet protocol television (IPTV) service, multicast traffic flows into a network, thereby increasing the load on network performance. As a result, there is a difficulty in securing the stability of the network.

In order to solve this problem, a technique for distributing head-ends to subscriber networks has been proposed. However, as head-ends are distributed to subscriber networks, the burden on content update of a broadcast server increases, and the cost of installing and maintaining the broadcast server increases.

In addition, the conventional multicast-based IPTV service has a problem that does not support mobility.

The technical problem to be solved by the present invention is to provide an IPTV service providing system and method that can reduce the load on the network performance and support the mobility of the mobile node.

According to an embodiment of the present invention, a method for providing an IPTV service in an end router is provided. In the IPTV service providing method, when the multicast address of an IPTV channel received from a broadcaster is a multicast address requested by a mobile node through a tunnel, a temporary address of the mobile node corresponding to the multicast address of the IPTV channel is provided. Address, CoA), and setting the multicast address in the first header of the broadcast traffic, and setting the CoA of the mobile node in the second header of the broadcast traffic to transmit the broadcast traffic. Include.

According to another embodiment of the present invention, a method for providing an IPTV service in an end router is provided. The method for providing an IPTV service includes receiving broadcast data of an IPTV channel from a broadcaster, including the broadcast traffic in a payload of broadcast traffic, and setting a multicast address of the IPTV channel in a first header of the broadcast traffic. Setting a care-of address (CoA) of a mobile node corresponding to the multicast address in a second header of the broadcast traffic, and transmitting the broadcast traffic.

According to another embodiment of the present invention, a system for providing an IPTV service is provided. The IPTV service providing system includes a multicast routing table, a multicast tunnel table, and a control unit. The multicast routing table stores a multicast address of an IPTV channel requested by a plurality of mobile nodes through a tunnel. The multicast tunnel table maps and stores home addresses (HoA) and temporary addresses (Care of Address, CoA) of the plurality of mobile nodes with the multicast addresses requested by the plurality of mobile nodes. When the control unit receives broadcast data of a predetermined IPTV channel from a broadcaster, the controller includes the broadcast data in a payload of broadcast traffic, sets a multicast address of the predetermined IPTV channel in a first header, and sets the multicast tunnel table. The CoA of the mobile node corresponding to the multicast address of the predetermined IPTV channel is set in a second header to transmit the broadcast traffic through the tunnel.

According to an embodiment of the present invention, it is possible to provide a multicast-based IPTV service while supporting tunnel-based mobility of a mobile node. In addition, in providing a multicast-based IPTV service, by providing a multicast-based IPTV service using a tunnel in an end network, continuity of services can be ensured and network load can be reduced.

1 is a view showing an IPTV service providing system according to an embodiment of the present invention,
2 is a diagram illustrating a tunnel-based mobility providing method of a mobile node in an end router according to an embodiment of the present invention;
3 is a view showing an end router according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a multicast routing table shown in FIG. 3.
FIG. 5 is a diagram illustrating a multicast tunnel table shown in FIG. 3.
6 is a diagram illustrating a method of transmitting and receiving tunnel based data traffic between a mobile node and a counterpart node;
7 is a diagram illustrating a method for establishing a tunnel with a mobile node in an end router according to an embodiment of the present invention;
8 illustrates a method of managing a multicast tunnel table in an end router according to an embodiment of the present invention.
9 is a diagram showing a method for providing an IPTV service according to an embodiment of the present invention;
10 and 11 are diagrams illustrating a method of delivering broadcast traffic in an end router according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

Now, a system and method for providing IPTV service with tunnel-based mobility support according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a system for providing IPTV service with tunnel-based mobility support according to an embodiment of the present invention.

Referring to FIG. 1, the tunnel-based mobility support IPTV service providing system includes an electronic program guide (EPG) server 110, a broadcast source (head-end) 120, a mobility support control server 130, End router 140 and a plurality of mobile nodes (MN).

The EPG server 110 provides Internet protocol television (IPTV) program guide information. The IPTV program guide information includes detailed information such as a schedule and a plot of IPTV channel broadcast programs, and multicast address and port information for each IPTV channel.

The broadcaster 120 manages broadcast traffic for each IPTV channel and provides broadcast traffic for each IPTV channel to the end router 140.

When the mobility support control server 130 receives a tunnel creation request from each of the plurality of mobile nodes MN through the end router 140, the tunnel between the end router 140 and the mobile node MN may be generated. The tunnel creation request is forwarded to the end router 140. The tunnel creation request may include home address (HoA) and care of address (CoA), NAT or firewall presence information of the mobile node (MN). Here, HoA serves as an identifier of the mobile node (MN) as a unique address of the mobile node (MN). CoA is a new address generated in the network to which the mobile node (MN) has moved, and is an address that changes as the access network moves.

In detail, the mobility support control server 130 instructs tunnel establishment while transmitting information on the HoA, CoA, NAT, or firewall of the mobile node (MN) to the end router 140. In addition, the mobility support control server 130 transmits the address of the end router 140 to the mobile node (MN) as tunnel termination information.

When the end router 140 receives the tunnel creation request from the mobility support control server 130, the end router 140 generates one currently available interface and an active tunnel (AT) of the mobile node (MN), and generates an active tunnel (AT). In preparation for the service limit of the standby tunnel (Standby Tunnel, not shown) is created at the same time as the active tunnel (AT). Here, the active tunnel AT is a tunnel used for transmitting and receiving data traffic, that is, broadcast traffic, as well as control messages. The standby tunnel is an auxiliary tunnel that periodically transmits and receives control messages without intervening in the actual transmission and reception of data traffic.

As such, the end router 140 may support mobility of the mobile node MN by establishing an active tunnel (AT) and a standby tunnel at the end router 140 according to the tunnel creation request of the mobility support control server 130. .

In addition, the end router 140 manages the HoA of the mobile node MN in which the active tunnel AT is established, and the presence or absence of CoA, NAT or firewall of the mobile node MN.

Meanwhile, according to an exemplary embodiment of the present invention, the mobility support control server 130 does not transmit the tunnel creation request from the mobile node MN to the end router 140, but directly communicates with the mobile node MN. You can also create tunnels.

Conventionally, the mobility support control server 130 establishes a tunnel with the mobile node MN and transmits and receives data traffic with the mobile node MN through the tunnel. However, according to an embodiment of the present invention, the mobility support control server 130 establishes a tunnel with the mobile node MN. Tunnel setting may be shared between the mobility support control server 130 and the end router 140 and processed. As such, when the tunnel setup with the mobile node MN is shared and processed by the mobility support control server 130 and the end router 140, the load of the mobility support control server 130 may be reduced.

The end router 140 according to an embodiment of the present invention receives and manages broadcast traffic for each IPTV channel from the broadcaster 120, and manages broadcast traffic of an IPTV channel selected by the mobile node (MN) through an active tunnel (AT). Provided to the mobile node MN. At this time, the terminating router 140 transmits broadcast traffic using the multicast address as the final destination address and considering CoA of the mobile node MN as the end address of the tunnel in consideration of the movement of the mobile node MN. In this way, the mobile node (MN) can be continuously provided with the broadcast traffic even when the mobile network (MN) moves. In addition, since broadcast traffic is transmitted through the active tunnel (AT), the load on network performance is reduced.

The mobile node (MN) refers to a mobile terminal device, and has a plurality of interfaces for generating a standby tunnel for connection and movement of heterogeneous networks. Thus, the mobile node MN can move while varying the access network according to its location.

The mobile node (MN) requests the tunnel creation using the tunnel creation message, requests the broadcast traffic of the IPTV channel using the active tunnel (AT) established with the end router 140, and terminates through the active tunnel (AT). The broadcast traffic of the IPTV channel is received from the router 140. When the end router 140 and the active tunnel AT are generated, the mobile node MN stores and manages its HoA and end router addresses as tunnel address information.

In addition, the mobile node (MN) may communicate with a correspondent node (Correspondent Node) to communicate through the active tunnel (AT).

2 is a diagram illustrating a tunnel-based mobility providing method of a mobile node in an end router according to an embodiment of the present invention. In FIG. 2, only one mobile node and one end router are shown for convenience of description.

Referring to FIG. 2, the terminating router 140 establishes an active tunnel (AT) with a mobile node (MN) according to a tunnel creation request, and sets up a standby tunnel (ST) in preparation for service restriction of the active tunnel (AT). do.

That is, the end router 140 detects the movement of the mobile node MN from the first network, eg, Wi-Fi, to the second network, eg, WiBro, and the preset standby tunnel ( The ST may be changed to the active tunnel AT, and at the same time, the standby tunnel ST may be generated again.

FIG. 3 is a diagram illustrating an end router according to an exemplary embodiment of the present invention, FIG. 4 is a diagram showing a multicast routing table shown in FIG. 3, and FIG. 5 is a diagram showing a multicast tunnel table shown in FIG. 3. .

Referring to FIG. 3, an end router 140 according to an embodiment of the present invention includes a tunnel table 142, a multicast routing table 144, a multicast tunnel table 146, and a controller 148.

The tunnel table 142 stores HoA and CoA of the mobile node MN.

The multicast routing table 144 stores multicast address and output interface information. Here, the output interface information may include a tunnel indicator. The tunnel indicator may be set when the channel request message including the multicast address of the IPTV channel requested by the mobile node MN is received through the tunnel.

That is, as shown in Fig. 4, the multicast routing table 144 stores the tunnel indicator as output interface information corresponding to the multicast address.

The multicast tunnel table 146 stores HoA, CoA, and multicast addresses of mobile nodes (MNs). In this case, depending on the presence of NAT or firewall, CoA may include the address of the mobility support control server 130. That is, as shown in FIG. 5, the multicast tunnel table 146 maps and stores the multicast address to HoA and CoA of the mobile node MN.

Referring back to FIG. 3, when the controller 148 receives a tunnel generation message including information on the HoA, CoA and NAT or firewall of the mobile node MN from the mobility support control server 130, the mobile node MN. Set the active tunnel (AT) and standby tunnel (ST) for communication with. Thereafter, the controller 148 maps HoA and CoA of the mobile node MN and stores them in the tunnel table 142.

In detail, when the HoA of the mobile node MN does not exist in the tunnel table 142, the controller 148 stores the HoA and CoA of the mobile node MN in the tunnel table 142. Then, when the mobile node MN moves through the access network and CoA is changed, the controller 148 updates the CoA of the mobile node MN in the tunnel table 142. When its CoA is changed, the mobile node MN transfers the changed CoA to the controller 148 so that the controller 148 can update the CoA of the mobile node MN. Through this operation, the controller 148 may manage HoA and CoA of the mobile node MN using the tunnel table 142.

In addition, when the control unit 148 receives a channel request message including the multicast address of the HoA of the mobile node MN and the IPTV channel selected by the mobile node MN from the mobile node MN through the active tunnel AT, The tunnel indicator is set by mapping to the multicast address included in the channel request message, and the multicast address and the tunnel indicator are stored in the multicast routing table 144. That is, when the channel request message is received through the active tunnel (AT), the controller 148 may set the tunnel indicator by mapping to the multicast address.

As such, when the tunnel indicator is set in the multicast address, the control unit 148 searches for the CoA corresponding to the HoA of the mobile node MN included in the channel request message by referring to the tunnel table 142 and the mobile node. The multicast address selected by the MN is mapped to the HoA and CoA of the mobile node MN and stored in the multicast tunnel table 146. In this way, the controller 148 may manage information in the multicast tunnel table 146.

After that, when the control unit 148 receives the broadcast traffic of the IPTV channel from the broadcaster 120, the controller 148 sets the header of the broadcast traffic of the IPTV channel with reference to the multicast routing table 144 and the multicast tunnel table 146. The broadcast traffic is transmitted by setting the CoA of the mobile node MN corresponding to the multicast address. At this time, the multicast address set in the header of the broadcast traffic of the IPTV channel is set.

6 is a diagram illustrating a method of transmitting and receiving tunnel based data traffic between a mobile node and a counterpart node. In FIG. 6, another mobile node MN communicating with one mobile node MN is illustrated as a counter node CN.

Referring to FIG. 6, the MN loads data in a payload, sets a HoA of a counterpart node CN, which is destination information, in a header, and an address of an end router 140, which is tunnel termination information, in a tunnel header. Send the data traffic set.

Then, the end router 140 receives the data traffic whose tunnel header information corresponds to its address.

The terminating router 140 searches for the CoA of the counterpart node CN corresponding to the HoA of the counterpart node CN in the header of the data traffic by referring to the tunnel table 142. The end router 140 then loads the data in the payload, sets the HoA of the counterpart node CN that is the destination information in the header, and sets the CoA of the counterpart node CN in the tunnel header to transmit data traffic. . Strictly speaking, CoA of the counterpart node CN is additionally set in the tunnel header to transmit data traffic. That is, since the payload of the data traffic contains data, and the HoA of the counterpart node CN which is the destination information is set in the header, the end router 140 selects the CoA of the counterpart node CN in the tunnel header of the data traffic. Additional settings to send data traffic. Then, the counterpart node CN may receive data traffic corresponding to its COA. That is, even if the mobile node MN transmits data traffic to the HoA of the counterpart node CN, the end node 140 transmits data traffic to the CoA of the counterpart node CN, so that the counterpart node CN home network. Even if the mobile node moves to another access network other than the peer node CN, the counterpart node CN may receive data traffic transmitted by the mobile node MN.

7 is a diagram illustrating a method for establishing a tunnel with a mobile node in an end router according to an embodiment of the present invention.

Referring to FIG. 7, the mobile node MN transmits a tunnel creation message using the address of the mobility support control server 130 as a destination to request tunnel generation (S710). At this time, the tunnel creation message includes its own HoA and CoA, NAT or firewall presence information.

The mobility support control server 130 receiving the tunnel creation message transmits the tunnel creation message to the end router 140 and requests for tunnel generation (S720).

Upon receiving the tunnel creation message, the end router 140 generates an active tunnel AT and a mobile node MN, and sets a standby tunnel ST in preparation for the service restriction of the active tunnel AT (S730).

Thereafter, the end router 140 registers the HoA and CoA of the mobile node MN in the tunnel table 142 (S740).

After completing the tunnel setup with the mobile node MN, the terminating router 140 transmits the tunnel response message for the tunnel creation message to the mobility support control server 130 (S750).

The mobility support control server 130 receiving the tunnel response message transmits the tunnel response message to the mobile node MN using the HoA of the mobile node MN as destination information (S760). In this case, the tunnel response message may include the address of the end router 140 that is the end information of the active tunnel (AT).

The mobile node MN, having received the tunnel response message from the mobility support control server 130, creates a tunnel at the end router 140 using the tunnel information. After that, the address of the end router is stored together with its HoA (S770).

8 is a diagram illustrating a method for managing a multicast tunnel table in an end router according to an embodiment of the present invention.

Referring to FIG. 8, the mobile node MN accesses the EPG server 110 and receives program guide information for each IPTV channel (S810).

The mobile node MN selects an IPTV channel to watch from the program guide information for each IPTV channel (S820). At this time, the mobile node (MN) stores the multicast address of the selected IPTV channel with its HoA.

Next, the mobile node MN transmits a channel request message including the multicast address of its selected IPTV channel and its HoA to the end router 140 through the active tunnel AT (S830). In this case, the mobile node MN may set its HoA to the source address of the header, and set the address of the terminating router in the tunnel header to transmit a channel request message to the terminating router 140 through the active tunnel AT. .

The end router 140 receives a channel request message corresponding to its address.

Upon receiving the channel request message, the end router 140 sets a tunnel indicator by mapping the multicast address included in the channel request message, stores the tunnel indicator in the multicast routing table 144, and then requests the channel from the tunnel table 142. After searching for the CoA corresponding to the HoA included in the header of the message, the HoA, the CoA, and the multicast address are mapped and stored in the multicast tunnel table 146.

The end router 140 may determine whether the IPTV channel is generated or changed based on the multicast address included in the channel request message. When the mobile node MN requests the creation of an IPTV channel, the terminating router 140 registers the multicast address in the multicast routing table 144 and the multicast tunnel table 146. Then, when the mobile node (MN) requests to change the IPTV channel using the channel request message, the end router 140 is multicast registered in the multicast routing table 144 and the multicast tunnel table 146. The address can be updated with the multicast address of the changed IPTV channel. In addition, when the mobile node MN requests the deletion of the IPTV channel, the terminating router 140 may delete the multicast address from the multicast routing table 144 and the multicast tunnel table 146.

As such, after storing the multicast address in the multicast routing table 144 and the multicast tunnel table 146, the end router 140 transmits the channel response message for the channel request message through the active tunnel (AT). (S850).

9 illustrates an IPTV service providing method according to an exemplary embodiment of the present invention.

Referring to FIG. 9, when receiving a channel request message from the mobile node MN (S910), the terminating router 140 selects an IPTV channel selected by the mobile node MN from a plurality of IPTV channels received from the broadcaster 120. The broadcast traffic of the IPTV channel corresponding to the multicast address is searched for (S920). Broadcast data includes broadcast data in a payload, and a multicast address of an IPTV channel selected by a mobile node (MN) is set in a header.

The end router 140 searches for the CoA of the mobile node (MN) by referring to the multicast routing table 144 and the multicast tunnel table 146 using the multicast address as a key, and then broadcasts the data to the payload of the broadcast traffic. Loads, sets the multicast address of the IPTV channel selected by the mobile node (MN) in the header of the broadcast traffic, and sets the CoA of the mobile node (MN) in the tunnel header to transmit broadcast traffic (S930). Strictly speaking, since the payload of broadcast traffic contains broadcast data, and the multicast address of the IPTV channel selected by the mobile node (MN) is set in the header, the terminating router 140 is connected to the tunnel header. The broadcast traffic is transmitted by additionally setting the CoA of the mobile node (MN).

Then, the mobile node MN can receive the broadcast traffic by extracting the broadcast traffic to be received from the CoA included in the tunnel header.

In addition, the end router 140 sets the CoA of the mobile node (MN) in the tunnel header of the broadcast traffic and delivers the broadcast traffic, so that the mobile node (MN) may receive the broadcast traffic selected by the mobile node (MN) even though the access network moves. There is a number.

10 and 11 are diagrams illustrating a method of delivering broadcast traffic in an end router according to an embodiment of the present invention.

10 and 11, when the end router 140 receives the channel request message from the mobile node MN, the IPTV channel included in the channel request message among the plurality of IPTV channels received from the broadcaster 120. Broadcast traffic of the same IPTV channel as that of the multicast address is extracted (S1010).

Thereafter, the end router 140 searches for the output interface information corresponding to the multicast address of the broadcast traffic by referring to the multicast routing table 144 (S1020). At this time, if the tunnel indicator is set in the output interface information (S1030), the terminating router 140 refers to the multicast tunnel table 146 to search for the CoA of the mobile node (MN) corresponding to the multicast address of the broadcast traffic. (S1040).

Thereafter, the end router 140 additionally sets the CoA of the mobile node (MN) to the tunnel header of the broadcast traffic and transmits the broadcast traffic (S1050 to S1060).

As such, when the CoA of the mobile node MN is set in the tunnel header and transmitted, the mobile node MN may receive broadcast traffic transmitted from the end router 140 even if the mobile node MN moves through the access network. There is a number. That is, even if the mobile node MN moves through the access network, the mobile node MN may be continuously provided with the IPTV service.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, Such an embodiment can be readily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (20)

In the method for providing IPTV service in an end router,
Receiving a tunnel creation message including a home address (HoA) and a care of address (CoA) of the mobile node,
Establishing a tunnel for communication with the mobile node,
Mapping the CoA of the mobile node with the HoA and storing the CoA in the tunnel table;
Checking the CoA of the mobile node corresponding to the multicast address of the IPTV channel when the multicast address of the IPTV channel received from the broadcasting source is the multicast address requested by the mobile node through a tunnel, and
Setting the multicast address in a first header of the broadcast traffic, and setting a CoA of the mobile node in a second header of the broadcast traffic to transmit the broadcast traffic
IPTV service providing method comprising a. The method of claim 1,
Prior to said checking, receiving a channel request message from said mobile node via said tunnel containing a multicast address of said IPTV channel;
IPTV service providing method comprising more. 3. The method of claim 2,
Setting a tunnel indicator by mapping to the multicast address of the IPTV channel received through the tunnel;
Further comprising:
Wherein the verifying step comprises:
And determining the multicast address as the multicast address requested through the tunnel when the tunnel indicator is set in the multicast address. delete The method of claim 1,
The setting step,
And additionally setting another tunnel in preparation for service restriction of the tunnel. The method of claim 1,
Before the checking step above,
Receiving a channel request message from the mobile node via the tunnel, the channel request message including the multicast address of the IPTV channel,
Searching for a CoA corresponding to the HoA of the mobile node in the tunnel table, and
Storing the multicast address and the retrieved CoA in a multicast tunnel table by referring to the HoA of the mobile node
IPTV service providing method comprising more. The method according to claim 6,
Wherein the verifying step comprises:
Identifying the CoA of the mobile node corresponding to the multicast address with reference to the multicast tunnel table. The method of claim 1,
Wherein the transmitting comprises:
And transmitting the broadcast traffic through the tunnel. In the method for providing IPTV service in an end router,
Receiving a tunnel creation message including a home address (HoA) and a care of address (CoA) of the mobile node,
Creating a tunnel for communicating with the mobile node;
Receiving broadcast data of an IPTV channel from a broadcast source,
Including the broadcast data in a payload of broadcast traffic;
Setting a multicast address of the IPTV channel in a first header of the broadcast traffic;
Setting a CoA of a mobile node corresponding to the multicast address in a second header of the broadcast traffic, and
Transmitting the broadcast traffic through the tunnel
IPTV service providing method comprising a. 10. The method of claim 9,
Setting the CoA,
If the multicast address of the IPTV channel is a multicast address requested by the mobile node through a tunnel, checking the CoA of the mobile node corresponding to the multicast address. The method of claim 10,
Setting the CoA,
Receiving from the mobile node a channel request message comprising the multicast address of the IPTV channel via the tunnel. delete 10. The method of claim 9,
Mapping and storing CoA and HoA of the mobile node in a tunnel table
IPTV service providing method comprising more. 14. The method of claim 13,
Receiving, via the tunnel, a channel request message including a multicast address including the multicast address of the IPTV channel from the mobile node;
Searching for a CoA corresponding to the HoA of the mobile node by referring to the tunnel table, and
Mapping the multicast address to HoA and CoA of the mobile node and storing the multicast address in a multicast tunnel table
IPTV service providing method comprising more. 15. The method of claim 14,
Setting the CoA,
Searching for the CoA of the mobile node corresponding to the multicast address by referring to the multicast tunnel table. 10. The method of claim 9,
And the second header is located before the first header. In the system for providing IPTV service,
A multicast routing table that stores multicast addresses of IPTV channels requested by multiple mobile nodes through a tunnel,
A multicast tunnel table storing home addresses (HoA) and temporary addresses (Care of Address, CoA) of the plurality of mobile nodes by mapping them to the multicast addresses requested by the plurality of mobile nodes, and
When receiving broadcast data of a predetermined IPTV channel from a broadcast source, the broadcast data is included in a payload of broadcast traffic, a multicast address of the predetermined IPTV channel is set in a first header, and the multicast tunnel table is referred to. Control unit for setting the CoA of the mobile node corresponding to the multicast address of the predetermined IPTV channel in the second header to transmit the broadcast traffic through the tunnel
Including;
The control unit receives a tunnel creation message including the HoA and CoA of the mobile node from the mobile node, and uses the HoA and CoA of the mobile node and generates the tunnel. delete 18. The method of claim 17,
Further includes a tunnel table,
The control unit IPTV service providing system for storing the HoA and CoA of the mobile node in the tunnel table after establishing the tunnel. 20. The method of claim 19,
The control unit,
Receiving a channel request message including a multicast address requested by the mobile node from the mobile node, searching for the CoA of the mobile node in the tunnel table with reference to the HoA of the mobile node, and then moving the multicast address to the mobile node IPTV service providing system for mapping to the HoA and CoA of the node to store in the multicast tunnel table.

Images