CN101931787B - Method, device and system for controlling multicast program - Google Patents

Abstract

The invention discloses a method, a device and a system for controlling multicast programs. The method comprises the following steps of: setting program authority of a set-top-box (STB), wherein the program authority is identified by a multicast user which the STB belongs to and an STB identifier; receiving a multicast join request of the STB; and according to the multicast join request, acquiring the program authority of the STB which transmits the multicast join request so as to control the programs of the STB which transmits the multicast join request. In the method, the program authority is bound to the STB per se, so that when one port connected with the STB changes, the programs which can be watched through the STB can be bound to the STB per se and do not change along with the change of the port.

Description

Method, device and system for controlling multicast program

technical field

The present invention relates to a communication system, in particular to a method, device and system for controlling multicast programs. the

Background technique

Multicast technology realizes efficient data transmission from point to multipoint in the network. Using multicast technology, the source server only needs to transmit a multicast data message to the backbone network, and the multicast data message is transmitted to the user directly through the backbone network. The connected access devices will be copied multiple times when the access devices transmit to different users. It can be seen that the multicast technology greatly reduces the network bandwidth occupation during data transmission, and effectively reduces the distance between the backbone network and the source server. It reduces the probability of data congestion in the backbone network and is the most suitable point-to-multipoint communication service support technology. the

IPTV (Internet Protocol Television) is a video-on-demand service realized by using multicast technology. IPTV users order video programs through a set-top box STB (Set Top Box). control. On the IP Digital Subscriber Line Access Multiplexer DSLAM (Digital Subscriber Line Access Multiplexer), the identification of the IPTV user is the configured multicast user, which corresponds to a family, and the program authority can be configured based on the multicast user. the

When there are multiple STBs in the same family, that is, multiple STBs are connected to one gateway device, if multiple STBs have the same program rights, only one multicast user needs to be established for the family on the IP DSLAM, and the multicast user configuration Program rights, multiple STBs in the family can order programs that the multicast user is entitled to watch, and have the same rights. the

If multiple STBs are required to have different program permissions, the existing processing method is that the user gateway RG (Resident Gateway) device adds different 802.1Q TAGs according to different ports, and the IP DSLAM creates multicast users based on the 802.1Q TAGs. The user sets the program authority, so as long as it is an STB under this port, no matter which STB it is, its program authority is the same, and the program authority will not change when the STB is replaced. the

Contents of the invention

Embodiments of the present invention provide a method, device and system for controlling a multicast program, which are used to realize the binding of the program authority and the STB itself, so as to control the program authority of the STB itself. the

An embodiment of the present invention provides a control method for a multicast program, comprising steps:

The access device receives a multicast join request from a set-top box STB, and the multicast join request includes the STB mark of the STB;

The access device identifies the multicast user to which the STB belongs according to the multicast join request, acquires the identification information of the multicast user to which the STB belongs, and queries according to the identification information of the multicast user and the STB mark The identification information of the multicast user stored on the access device and the corresponding relationship between the STB and the multicast program list obtain the multicast programs that the STB can watch, so as to control the multicast programs of the STB, wherein , the multicast user is associated with multiple STBs, and the identification information of the multicast user includes the port identification and 802.1Q TAG of the port on the access device. the

An embodiment of the present invention provides a method for controlling multicast programs, including:

The access device receives a multicast join request from the STB, and the multicast join request includes the STB mark of the STB;

The access device identifies the multicast user corresponding to the STB according to the multicast join request, acquires the identification information of the multicast user corresponding to the STB, and queries the saved multicast user according to the identification information of the multicast user The corresponding relationship between the identification information of the multicast user and the multicast program list, and obtain the multicast program that the STB can watch, so as to control the multicast program of the STB, wherein the identification information of the multicast user includes the access device The port identification, 802.1Q TAG and STB mark of the port on the device, or the port identification and STB mark of the port on the access device. the

An embodiment of the present invention provides an access device, including:

Program rights management unit, used to manage the program rights of the set-top box STB, including storing the identification information of the multicast user and the corresponding relationship between the STB mark and the multicast program list;

The multicast protocol message processing unit receives a multicast join request from the STB, and the multicast join request includes an STB mark;

The control unit obtains the STB mark according to the multicast join request received by the multicast protocol message processing unit and determines the multicast user to which the STB belongs, and according to the STB mark and the identity of the multicast user to which the STB belongs The information query program authority management unit stores the identification information of the multicast user and the corresponding relationship between the STB mark and the multicast program list, and obtains the program authority of the STB, thereby controlling the multicast program of the STB, wherein the The identification information of the multicast user includes the port identification and 802.1Q TAG of the port on the access device, or includes the port identification, 802.1QTAG and STB label of the port on the access device. the

An embodiment of the present invention provides a control system for multicast programs, including an access device, a gateway device and an STB, the access device is connected to the STB through the gateway device,

STB, in order to send multicast join request, described multicast join request comprises STB mark;

The gateway device is used to forward the message between the STB and the access device;

An access device, configured to receive the multicast join request, obtain the STB mark according to the multicast join request and determine the multicast user to which the STB belongs, and obtain the STB mark according to the STB mark and the multicast user to which the STB belongs The identification information of the user queries the identification information of the multicast user and the corresponding relationship between the STB mark and the multicast program list, and obtains the program authority of the STB, thereby controlling the multicast program of the STB, wherein the multicast user The identification information includes the port identification and 802.1QTAG of the port on the access device, or includes the port identification, 802.1Q TAG and STB label of the port on the access device. the

The method, device and system for controlling STB programs provided by the embodiments of the present invention have the following technical effects: in the case that a family has multiple STBs, each STB has different program rights, and when setting the program rights of these STBs, the The program rights are bound with the STB itself, so that no matter which port the STB is connected to in the family, the programs that can be watched are fixed and will not change with the port. the

Description of drawings

Fig. 1 is the schematic diagram of the system architecture that realizes STB multicast program that the embodiment of the present invention provides;

Fig. 2 is the flow chart of the first embodiment of the control method of the STB multicast program that the embodiment of the present invention provides;

Fig. 3 is the flow chart of the second embodiment of the control method of the multicast program of STB that the embodiment of the present invention provides;

Fig. 4 is a schematic structural diagram of an access device provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of an STB multicast program control system provided by an embodiment of the present invention. the

specific embodiment

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. the

Throughout the specification and claims, unless otherwise expressly specified, the following terms have the following meanings in turn:

Multicast channel: a channel used to carry multicast-related information, with identification information. the

Multicast user: The access device regards the user of the multicast channel as a multicast user and has identification information, which may be part or all of the identification information of the corresponding multicast channel. the

Port ID: It can be represented by the frame, slot, and frame number, slot number, and port number corresponding to the port on the device. the

FIG. 1 is a schematic diagram of a system architecture for multicasting. In this figure, the access device 100 is located at the central office, the gateway device 110 and two STBs belong to a family, and the gateway device 110 is connected to port 1 on the access device 100. connect. The gateway device 110 is connected to two STBs through port 2 and port 3 respectively. Those of ordinary skill in the art should understand that a family can have multiple STBs, wherein,

The network management system 120 is used to set the program authority of the STB, and deliver the program authority of the STB to the access device 100 . the

The IPTV server 130 is configured to deliver the multicast program stream including the corresponding multicast program according to the request of the access device 100 . the

The access device 100 serves as an intermediate device between the gateway device 110 and the upper-layer network device located in the upper-layer network, and is used for forwarding messages between the gateway device and the upper-layer network device and converting the internal protocol of the access network and the upper-layer network protocol. the

The gateway device 110 is configured to forward packets between the STB and the access device 100 . the

An embodiment of the present invention provides a method for controlling STB multicast programs. The method provided can bind the STB program authority with the STB itself when a family owns at least one STB, so that no matter whether a Which port on the gateway device of the family the STB is connected to, the multicast programs it can watch are fixed. In this embodiment, a family has two STBs as an example. When there are multiple STBs, the method for controlling the multicast program of multiple STBs is similar to the method used when there are two STBs in this embodiment. the

Since the multicast join request sent by the STB carries the STB mark, there are two ways to control the multicast program of the STB: Create a multicast channel for a family, and the STBs of the family all send and receive through this channel For multicast-related information, since the access device regards the user of the multicast channel as a multicast user, multiple STBs in this family belong to the same multicast user. In this case, set the program permission to multicast The corresponding relationship between the identification information of the user and the STB mark and the multicast program list, wherein the identification information of the multicast user is a part of the identification information of the corresponding multicast channel. After the access device 100 receives the multicast join request of the STB, it identifies the multicast user to which the STB belongs, and can obtain the program authority of the STB in combination with the identification information of the multicast user and the STB mark; it can also be used when creating a multicast channel Each STB in the family creates a multicast channel. In this way, the access device treats each STB as a multicast user, and sets the program authority as the corresponding relationship between the identification information of the multicast user and the list of multicast programs. After receiving the multicast join request, obtain the identification information of the multicast user, and deliver the corresponding multicast program stream according to the set program authority. The following two implementation methods are introduced respectively. the

Implementation mode one

The access device creates a multicast channel for each family, and treats multiple STBs in the family as a multicast user. After receiving the multicast join request sent by the STB, it identifies the multicast user to which the STB belongs. The identification information of the multicast user and the STB mark obtain the program authority corresponding to the STB, specifically including the steps: 

Step 200, the access device creates a multicast channel for each family. the

The access device 100 creates a multicast channel with the gateway device 110, and the created multicast channel is used to carry multicast related information, such as multicast join request, multicast service flow and other multicast related information. Specifically, the access device 100 creates a multicast channel between the access device 100 and the network management device 110 according to the port identifier and 802.1Q TAG of the ports on the access device 100. How to specifically create a multicast channel is a matter of ordinary skill in the art. Everyone should be aware. Among them, the 802.1Q TAG is used to identify the gateway devices of different families. In FIG. multicast users, the access device 100 saves the identification information of the multicast channel. the

In step 205, the access device sets the program authority of the STB as the identification information of the multicast user and the corresponding relationship between the STB mark and the multicast program list. the

The access device 100 requests the network management system 120 to issue STB program rights. The program rights are the identification information of the multicast user and the corresponding relationship between the STB mark and the multicast program list. The STB program rights can also be configured by the network management system 120. Issued to the access device 100, wherein the identification information of the multicast user includes the port identification and 802.1Q TAG of the port on the access device 100. the

The STB mark may be at least one of the IP address of the STB, the MAC address of the STB, the authentication user name of the STB, the account number of the STB and other extended information. In this embodiment, the STB mark takes the IP address of the STB as an example, and the operator sets the IP address of the STB when issuing the STB, and registers the IP address of the STB to be issued. In operation, you can set fixed static IP addresses for different STBs of a family when issuing STBs, or you can not set them fixedly when issuing STBs, but require STBs to start a PPPOE session when they go online, and authenticate to the upper layer. The IP address of the STB is dynamically set through the STB account issued in advance. After the IP address of the STB is set, the source IP address of the multicast join request sent by the STB is the IP address of the STB itself, wherein the multicast join request may be an existing IGMP message. the

In step 210, the STB sends a multicast join request including the STB mark. the

The STB sends a multicast join request to the access device 100 through the gateway device 110, and the multicast join request includes the IP address of the STB and the multicast program that the STB requests to join. the

Step 215, the gateway device forwards the multicast join request sent by the STB to the access device. the

After the gateway device 110 receives the multicast join request initiated by the STB, it judges whether the multicast join request includes an 802.1Q TAG. Directly forward to the access device 100; otherwise, the gateway device 110 adds the 802.1Q TAG corresponding to the gateway device 110 in the multicast join request, and sends the multicast join request including the 802.1Q TAG to the access device 100, wherein the 802.1 Q TAG contains information such as Ethernet frame type, virtual local area network VLANID, and frame priority. the

In step 220, the access device obtains the program authority of the STB according to the multicast join request. the

After receiving the multicast join request forwarded by the gateway device 110, the access device 100 obtains the identification information of the multicast channel carrying the multicast join request, specifically, the port identification of the port on the access device 100 that receives the multicast join request And the 802.1Q TAG in the multicast join request. Obtain the identification information of the multicast user according to the identification information of the obtained multicast channel, extract the STB mark in the multicast join request, the identification information of the multicast user includes port identification and 802.1Q TAG, according to the identification information of the multicast user and the STB The mark searches for the program authority of the STB stored on the access device 100, so as to determine whether the STB has the authority to watch the requested multicast program. the

Step 225, the access device sends the multicast service stream including the multicast program to the gateway device. the

After passing the authentication, the access device 100 can receive the multicast service flow corresponding to the multicast program issued by the IPTV server 130, and search the forwarding table on the access device 100 to select the corresponding multicast channel to send the multicast service to The stream is sent to the corresponding gateway device. If the multicast channel (referred to as the upper layer multicast channel) of the multicast program between the access device 100 and the IPTV server has been established on the access device 100 before the STB sends the multicast join request, the access device 100 After the STB sends the multicast join request, it does not need to request the same multicast program from the IPTV server, and directly sends the multicast service flow corresponding to the multicast program to the STB from the established upper layer multicast channel. Wherein, the upper-layer multicast channel may be pre-configured, and may be established each time the multicast program is requested for authentication, or it may be established when the access device discovers that the multicast program is requested for the first time. A multicast channel should be known to those skilled in the art. the

Step 230, the gateway device forwards the multicast service flow including the multicast program to the corresponding STB. the

After receiving the multicast service flow delivered by the access device 100, the gateway device 110 sends the multicast service flow to the corresponding STB. the

Implementation mode two

The access device creates a multicast channel for each STB of a family. In this way, the family has multiple multicast users corresponding to the STBs of the family. After receiving the multicast join request sent by the STB, it identifies the STB to which the STB belongs. multicast user, according to the identification information of the multicast user to which he belongs, obtains the program authority corresponding to the STB, which specifically includes the following steps: 

Step 300, the access device creates a multicast channel for each STB of a family. the

The access device 100 creates a multicast channel between the access device 100 and the STB based on the port identifier, the 802.1Q TAG and the STB tag of the port on the access device 100, or the port identifier and the STB tag of the port on the access device 100 , in FIG. 1, the access device 100 creates a multicast channel between the access device 100 and the STB connected to the gateway device 110 based on the port identifier of port 1, the 802.1Q TAG corresponding to the gateway device 110, and the STB tag. The access device 100 creates two multicast channels for the family, the access device regards the two STBs of the family as multicast users, and the access device 100 saves the identification information of the multicast channel. the

In step 305, the access device sets the program authority of the STB as the correspondence between the identification information of the multicast user and the list of multicast programs. the

The access device 100 requests the network management system 120 to issue STB program rights. The program rights can be the correspondence between the identification information of the multicast user and the multicast program list. The STB program rights can also be configured by the network management system 120 and issued spontaneously. For the access device 100, wherein the identification information of the multicast user includes the port identification, 802.1Q TAG and STB identification of the port on the access device 100. the

In step 310, the STB sends a multicast join request including the STB mark. the

The STB sends a multicast join request to the access device 100 through the gateway device 110, and the multicast join request includes the IP address of the STB and the multicast program that the STB requests to join. the

Step 315, the gateway device forwards the multicast join request sent by the STB to the access device. the

After the gateway device 110 receives the multicast join request initiated by the STB, it judges whether the multicast join request includes an 802.1Q TAG. Directly forward to the access device 100; otherwise, the gateway device 110 adds the 802.1Q TAG corresponding to the gateway device 110 in the multicast join request, and sends the multicast join request including the 802.1Q TAG to the access device 100, wherein, 802.1Q TAG includes information such as Ethernet frame type, virtual local area network VLANID, and frame priority. the

In step 320, the access device obtains the program authority of the STB according to the multicast join request. the

After receiving the multicast join request forwarded by the gateway device 110, the access device 100 obtains the identification information of the multicast channel carrying the multicast join request, specifically, the port identification of the port on the access device 100 that receives the multicast join request And the 802.1Q TAG and STB mark in the multicast join request, or obtain the port identifier of the port receiving the multicast join request on the access device 100 and the STB mark in the multicast join request. Obtain the identification information of the multicast user according to the identification information of the multicast channel obtained, the identification information of the multicast user includes port identification, 802.1Q TAG and STB mark, search the STB saved on the access device 100 according to the identification information of the multicast user program authority, so as to determine whether the STB has the authority to watch the requested multicast program. the

Step 325, the access device sends the multicast service stream including the multicast program to the gateway device. the

After passing the authentication, the access device 100 can receive the multicast service flow corresponding to the multicast program issued by the IPTV server 130, and search the forwarding table on the access device 100 to select the corresponding multicast channel to send the multicast service to The stream is sent to the corresponding gateway device. the

Step 330, the gateway device forwards the multicast service flow including the multicast program to the corresponding STB. the

After receiving the multicast service flow delivered by the access device 100, the gateway device 110 sends the multicast service flow to the corresponding STB. the

The STB multicast program control method provided by this embodiment, when there are multiple STBs in a family, the multiple STBs of the family are distinguished by the STB mark, and the corresponding program rights are set for different STBs, so that the program rights Bind with the STB itself, so that even if an STB is connected from one port of the home gateway device to another port, the programs that the STB can watch are fixed and will not change with the port to which the STB is connected And change. the

An embodiment of this embodiment provides an access device, as shown in FIG. 4 , including: a program rights management unit 401, a control unit 403, a multicast protocol packet processing unit 405, a multicast forwarding unit 407, and a service creation unit 409 ,in,

The program authority management unit 401 is used to manage the program authority of the STB, specifically including: storing the identification information of the multicast user and the corresponding relationship between the STB mark and the multicast program list, wherein the identification information of the multicast user includes: The port ID and 802.1Q TAG of the port. Wherein, the program authority management unit 401 can send a request message to the network management system through the interface with the network management system, requesting the network management to issue the STB program authority, and receive the STB program authority issued by the network management system through the interface with the network management system. The program authority can be is the correspondence between the identification information of the multicast user, the STB mark and the list of multicast programs. the

The multicast protocol packet processing unit 405 is configured to monitor and analyze multicast protocol packets, and record relevant information. For example, the multicast protocol packet processing unit 405 monitors the multicast join request initiated by the STB. the

The control unit 403 is configured to obtain the STB mark in the multicast join request received by the multicast protocol packet processing unit 405, determine the multicast user to which the STB that sends the multicast join request belongs, and determine the multicast user according to the identification information of the multicast user and the STB Mark the corresponding relationship between the identification information of the multicast user and the STB mark in the program rights management unit 401 and the STB mark and the multicast program list, obtain the multicast program list that can be watched by the STB that sends the multicast join request, according to the obtained multicast The program list determines whether the STB has the authority to watch the requested multicast program, and if so, determines whether the access device has established the group connection between the access device and the IPTV server before the STB sends the multicast join request. The multicast channel of the broadcast program, if yes, then notify the multicast forwarding unit 407 to send the multicast service flow corresponding to the multicast program to the STB, if the access device has not been established before the STB sends the multicast join request For the multicast channel of the multicast program between the access device and the IPTV server, notify the service creation unit 409 to establish a multicast channel between the access device and the upper-layer network device. the

The multicast forwarding unit 407 is configured with a multicast forwarding table, and is used to forward the multicast service flow according to the multicast forwarding table. Wherein, the multicast forwarding unit 407 forwards the multicast service flow corresponding to the multicast program delivered by the server to the STB through the multicast channel of the STB. the

The service creation unit 409 is configured to create a multicast channel between the access device and the gateway device, and a multicast channel between the access device and the upper-layer network device. the

The service creation unit 409 can include two ways in creating the multicast channel between the access device and the gateway device, one way is based on the port identification and 802.1Q TAG of the port on the access device, and the other way is based on the The port identification, 802.1Q TAG and STB mark of the port on the access device, or the port identification and STB mark of the port on the access device, how to create a multicast channel between the access device and the gateway device is common in the art Technicians should be aware. the

The service creation unit 409 is also configured to notify the multicast forwarding unit 407 to forward the multicast service flow to the STB after creating the multicast channel between the access device and the upper-layer network device according to the command of the control unit 403 . the

The access device provided in this embodiment binds the program authority to the STB by distinguishing STBs, so that when a family has multiple STBs, it is distinguished which STB is sent by the STB mark in the multicast join request The multicast join request is used to select the program authority corresponding to the STB to control the multicast programs that the STB can watch. the

An embodiment of the present invention provides a control system for a STB multicast program, as shown in Figure 5, including an access device 500, a gateway device 510 and a STB520,

in,

The STB520 is configured to send a multicast join request to the access device 500, where the multicast join request includes the STB mark of the STB510. the

The gateway device 510 is configured to forward packets between the STB 520 and the access device 500 , including forwarding the multicast join request of the STB 520 to the access device 500 . the

The access device 500 is configured to receive the multicast join request from the STB510, obtain the identification information of the multicast channel carrying the multicast join request and the STB mark in the multicast join request, and obtain the multicast user ID according to the identification information of the multicast channel According to the obtained identification information of the multicast user and the STB mark, query the program authority of the STB stored on the access device 500, so as to obtain the multicast programs that the STB can watch. the

The access device 500 is also used to request an upper-layer network device (not shown in FIG. etc.) to issue the STB program authority, the program authority is the identification information of the multicast user and the corresponding relationship between the STB and the multicast program list, wherein the identification information of the multicast user includes the port identification of the port on the access device 500 and the 802.1 Q TAG. the

The access device can also create a multicast channel with the STB520 according to the port identification, 802.1Q TAG and STB label of the port on the access device 500, or according to the port identification and the STB label of the port on the access device 500, request The upper-layer network device issues STB program permissions, and the program permissions are the correspondence between the identification information of the multicast user and the multicast program list, wherein the identification information of the multicast user includes the port identification of the port on the access device 500, 802.1Q The TAG and the STB mark or include the port identifier and the STB mark of the port on the access device 500 . After receiving the multicast join request from the STB510, the access device 500 obtains the identification information of the multicast channel carrying the multicast join request, obtains the identification information of the multicast user according to the identification information of the multicast channel, and obtains the multicast user's identification information according to the obtained multicast The identification information of the user inquires about the program authority of the STB stored on the access device 500, so as to obtain the multicast programs that the STB can watch. the

The control system of the STB multicast program provided by this embodiment can ensure that the program authority of the STB in the system is bound to the STB itself by distinguishing the STB and selecting the corresponding program authority to control the STB program. The program rights of each STB are fixed, and when an STB is connected to another port from one port of a family's access device, the rights of the STB will not change. the

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range. the

Claims (9)

1. A method for controlling a multicast program, comprising:

the access equipment receives a multicast joining request from a Set Top Box (STB), wherein the multicast joining request comprises an STB mark of the STB;

the access device identifies a multicast user to which the STB belongs according to the multicast joining request, acquires identification information of the multicast user to which the STB belongs, and inquires the identification information of the multicast user stored on the access device and the corresponding relation between the STB and a multicast program list according to the identification information of the multicast user and the STB mark, and acquires multicast programs that the STB can watch, so as to control the multicast programs of the STB, wherein the multicast user is associated with a plurality of STBs, the plurality of STBs correspond to one multicast channel, and the plurality of STBs receive the multicast programs through the multicast channel;

the identification information of the multicast user comprises port identification of a port on the access equipment and 802.1 QTAG.

2. The method of claim 1, wherein prior to the access device receiving the multicast join request from the STB, further comprising:

the access equipment creates a multicast channel according to the port identification of the port on the access equipment and the 802.1Q TAG;

the access device requests the upper network device to send the identification information of the multicast user and the corresponding relation between the STB and the multicast program list.

3. The method of claim 1, wherein the identifying, by the access device, the multicast user to which the STB belongs according to the multicast join request specifically comprises:

the access equipment acquires a port identifier of a port receiving the multicast adding request and an 802.1Q TAG in the multicast adding request, and acquires a multicast channel bearing the multicast adding request according to the acquired 802.1Q TAG and the port identifier;

and the access equipment acquires the identification information of the multicast advocacy according to the identification information of the multicast channel.

4. The method of any of claims 1-3, wherein the STB is tagged as one of an IP address of the STB, a MAC address of the STB, an authenticated user name of the STB, and an account number of the STB.

5. An access device, comprising:

the program authority management unit is used for managing the program authority of the STB, and comprises the identification information of the multicast user and the corresponding relation between the STB mark and the multicast program list; one multicast user corresponds to a plurality of STBs, the plurality of STBs correspond to one multicast channel, and the plurality of STBs receive multicast programs through the multicast channel;

the multicast protocol message processing unit receives a multicast adding request from the STB, wherein the multicast adding request comprises an STB mark;

the control unit acquires the STB mark according to the multicast adding request received by the multicast protocol message processing unit, determines the multicast user to which the STB belongs, inquires the corresponding relation between the identification information of the multicast user and the STB mark and the multicast program list stored by the program permission management unit according to the STB mark and the identification information of the multicast user to which the STB belongs, and acquires the program permission of the STB so as to control the multicast program of the STB;

wherein, the identification information of the multicast user comprises a port identification and an 802.1Q TAG of a port on the access device, or comprises a port identification, an 802.1Q TAG and an STB mark of a port on the access device.

6. The apparatus of claim 5, wherein the access device further comprises a service creation unit,

the service creating unit is used for creating a multicast channel, and if the execution is successful, the service creating unit informs the program authority management unit to send a request message for issuing the program authority to the network management system.

7. The device according to claim 5, wherein the access device further comprises a relay forwarding unit, and the multicast forwarding unit is configured with a multicast forwarding table, and configured to send a multicast service stream containing the multicast program to the STB according to the multicast forwarding table after the control unit determines that the STB has the right to view the requested multicast program.

8. A control system of multicast programs comprises an access device, a gateway device and a Set Top Box (STB), wherein the access device is connected with the STB through the gateway device, the gateway device is connected with a plurality of STBs, the STBs correspond to a multicast channel between the access device and the gateway device, and the STBs receive multicast programs through the multicast channel;

the STB is used for sending a multicast joining request, and the multicast joining request comprises an STB mark;

the gateway device is used for forwarding a message between the STB and the access device;

the access device is used for receiving the multicast adding request, obtaining the STB mark according to the multicast adding request, determining a multicast user to which the STB belongs, inquiring identification information of the multicast user and the corresponding relation between the STB mark and a multicast program list according to the STB mark and the identification information of the multicast user to which the STB belongs, and obtaining the program authority of the STB so as to control the multicast program of the STB;

wherein, the identification information of the multicast user comprises a port identification and an 802.1Q TAG of a port on the access device, or comprises a port identification, an 802.1Q TAG and an STB mark of a port on the access device.

9. The system of claim 8, wherein the access device is further configured to receive a program right issued by the network management system, and store the program right on the access device, where the program right is a correspondence between identification information of a multicast user and an STB mark and a multicast program list.

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