KR101380523B1 - Method and apparatus for controling receiving ip multicast services based on network - Google Patents

Abstract

Provided are a network-based IP multicast service reception control apparatus and method. The snooping table may be used to control data corresponding to the multicast channel. The snooping table can be updated based on the service profile. Alternatively, the snooping table may be updated based on a control message according to whether a user subscribes. Whether data transmission is requested may be determined according to whether data corresponding to a multicast channel requested from a user is already being serviced to another user.

Description

Network-based IP multicast service reception control device and method {METHOD AND APPARATUS FOR CONTROLING RECEIVING IP MULTICAST SERVICES BASED ON NETWORK}

The present invention relates to an apparatus and method for controlling reception of an IP multicast service on a network basis.

A Conditional Access System (CAS) for multicast services is used to ensure that only legitimate users of a multicast channel can receive data from that channel. CAS for IP multicast service, such as IPTV service, scrambling or encrypting the data in the system that transmits the data corresponding to the multicast channel, and distributing or deciphering or decrypting the key to only the right user, so only the right user It is possible to descramble or decode data corresponding to a multicast channel.

Embodiments of the present invention provide an apparatus and method for controlling IP multicast service reception on a network basis.

The multicast reception control switch according to an embodiment of the present invention includes a memory storing a service profile and a snooping table including information on a multicast channel to which each of a plurality of users is subscribed; And determining whether a specific user is subscribed to a specific multicast channel using the service profile, updating information about the specific user in a snooping table based on the determination result, and multicasting using the snooping table. And a processor controlling data corresponding to the specific multicast channel transmitted from the router.

The processor may determine whether the specific user is subscribed to a specific multicast channel by using the service profile in response to the request of the specific user using the specific multicast channel.

The processor may request the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch.

The processor requests the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch according to whether or not data corresponding to the specific multicast channel is already received from the multicast router. Can be.

The multicast router may transmit data corresponding to the specific multicast channel to the multicast reception control switch based on the service profile and the request of the multicast reception control switch.

Multicast reception control switch according to an embodiment of the present invention includes a memory in which a snooping table is stored; And in response to a request for a specific user to use a specific multicast channel, update information about the specific user in a snooping table, control data corresponding to the specific multicast channel using the snooping table, and And a processor for updating the snooping table according to a control message for deleting the information about the specific user based on whether the specific user received from the cast router is subscribed to the specific multicast channel.

The processor may request the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch in response to a request for the specific user to use a specific multicast channel.

The processor may request the multicast router to confirm whether the specific user is subscribed to the specific multicast channel according to whether the data corresponding to the specific multicast channel is already received from the multicast router. .

The processor is configured to determine whether the specific user is subscribed to the specific multicast channel using a service profile including information on a multicast channel to which each of the plurality of users is subscribed. Data corresponding to a specific multicast channel may be received.

A multicast router according to an embodiment of the present invention includes a service profile including information on a multicast channel to which each of a plurality of users is subscribed in response to a request of a multicast reception control switch regarding a specific multicast channel of a specific user. A processor for determining whether a specific user is subscribed to a specific multicast channel by using a processor; And a transmitter configured to transmit data corresponding to the specific multicast channel to the multicast reception control switch according to a determination of the processor as to whether the specific user is subscribed to the specific multicast channel.

The processor generates a control message to delete information about the specific user from the snooping table when the specific user is not subscribed to the specific multicast channel, and the transmission unit receives the multicast control message. Can be sent to the control switch.

The multicast router may further include a memory in which a service profile including information on a multicast channel subscribed to each of the plurality of users is stored.

The memory may obtain the service profile from an external server that processes a channel subscription request of the plurality of users.

The request of the multicast reception control switch relates to a request for transmitting data corresponding to the specific multicast channel to the multicast reception control switch or to confirm whether the specific user is subscribed to the specific multicast channel. It may be a request.

IP multicast service reception control method using a multicast reception control switch according to an embodiment of the present invention is characterized in that the multicast reception control switch in response to a request for the specific user to use the specific multicast channel Updating information about a user in a snooping table of the multicast receive control switch; Determining, by the multicast router, whether the specific user is subscribed to the specific multicast channel, and transmitting data corresponding to the specific multicast channel to the multicast reception control switch according to the determination result; And controlling, by the multicast reception control switch, data corresponding to the specific multicast channel using the snooping table.

The updating of the information about the specific user in the snooping table of the multicast reception control switch may include: the specific user using the service profile including information on a multicast channel to which each of a plurality of users is subscribed; The snooping table may be updated according to whether or not the user is subscribed to a cast channel.

In the IP multicast service reception control method using a multicast reception control switch according to an embodiment of the present invention, the multicast reception control switch controls the multicast reception of data corresponding to the specific multicast channel to the multicast router. The method may further include requesting transmission to the switch.

The request for transmitting data corresponding to the specific multicast channel to the multicast reception control switch may include whether the multicast reception control switch is already receiving data corresponding to the specific multicast channel from the multicast router. The method may include requesting transmission of data corresponding to the specific multicast channel to the multicast reception control switch.

IP multicast service reception control method using a multicast reception control switch according to an embodiment of the present invention, when the multicast router is the particular user is not subscribed to the specific multicast channel, the specific in the snooping table Sending a control message to the multicast reception control switch to delete information about the user; And updating, by the multicast reception control switch, the snooping table according to the control message.

According to an embodiment of the present invention, access to a multicast channel to which a user does not subscribe may be blocked by controlling data corresponding to the multicast channel using a snooping table. That is, data can be transmitted to a legitimate user through control of a network device such as a multicast reception control switch and a multicast router without scrambling / descrambling or encryption / decryption. Therefore, the user's device can be simplified.

According to an embodiment of the present invention, the multicast reception control switch may service multicast data to a legitimate user by updating a snooping table based on a service profile for a specific channel use request of the user.

According to an embodiment of the present invention, the multicast reception control switch requests data transmission to a multicast router according to whether a specific channel is already serviced to another user for a specific channel use request of the user, thereby controlling the multicast reception. It can reduce the exchange of messages between the switch and the multicast router.

 According to one embodiment of the present invention, the multicast router transmits a control message to the multicast reception control switch to delete the user according to whether the user is subscribed to a specific channel, so that the multicast reception control switch can be used without a service profile. Can serve multicast data to legitimate users.

1 is a diagram illustrating a system for controlling IP multicast service reception based on a network according to an embodiment of the present invention.
2 is a diagram illustrating an example of an IP multicast service reception control process when the multicast reception control switch has a service profile and performs manual snooping.
3 is a diagram illustrating an example of an IP multicast service reception control process when the multicast reception control switch has a service profile and performs active snooping.
4 is a diagram illustrating an example of an IP multicast service reception control process when the multicast reception control switch performs manual snooping without a service profile.
FIG. 5 is a diagram illustrating an example of an IP multicast service reception control process when the multicast reception control switch performs active snooping without a service profile.
6 is a functional block diagram of a multicast reception control switch according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terminologies used herein are terms used to properly represent preferred embodiments of the present invention, which may vary depending on the user, the intent of the operator, or the practice of the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

Embodiments of the present invention can block data at the network level on the IP multicast channel to which the user does not subscribe using the multicast reception control switch. Here, the multicast reception control switch may be an L2 switch or an L3 switch. And a multicast reception control switch may exist between the user and the multicast router. The multicast router may be an L3 multicast router.

1 is a diagram illustrating a system for controlling IP multicast service reception based on a network according to an embodiment of the present invention.

Referring to FIG. 1, data corresponding to each multicast channel from the headend is transmitted to the users 110 via the network 120, the multicast router, and the multicast reception control switch.

Embodiments of the present invention can properly control a multicast reception control switch and a multicast router so that a user cannot receive a multicast channel to which a user does not subscribe without using a CAS. That is, embodiments of the present invention can control the reception control switch and the multicast router so that only users subscribed to the multicast channel can receive data on the multicast channel.

According to the embodiments of the present invention, the multicast reception control switch includes a reception request message (join request through a membership report message in the case of IGMP) and a multicast service reception message for the multicast service exchanged between the user and the multicast router. Snooping on multicast control messages such as (request for leave through membership report in case of IGMP).

And depending on whether a method of controlling the IP multicast service receiver in accordance with embodiments of the present invention has a service profile which includes information for a multicast channel that is the plurality of multicast reception control switch for each user subscription It is divided into two cases. Each case may be further subdivided into a method of performing manual snooping and a case of performing manual snooping. Each case will be described in detail with reference to FIGS. 2 to 5.

<< if the multicast reception control switch has a service profile ( Case1 ) >>

1. The multicast receive control switch has a service profile and manual Snooping of  If you do

When the multicast reception control switch has a service profile and performs manual snooping, the multicast reception control switch grasps the contents of the multicast control message exchanged between the user and the multicast router. The multicast reception control switch updates the snooping table according to whether the user subscribes to the corresponding multicast channel using the service profile, but does not filter the multicast control message.

When a user makes a request for using a specific multicast channel, the multicast reception control switch determines whether the user is subscribed to the specific multicast channel using a service profile. If the user is not subscribed to a particular multicast channel, the multicast receive control switch does not add the port to which the user is connected as a member of the multicast channel in the snooping table. As a result, users who are not subscribed to the multicast channel cannot receive service. At this time, the management of members per multicast channel may be performed for each multicast MAC address.

In addition, the multicast service reception request message from the user is delivered to the multicast router. The multicast router may also filter the multicast service reception request message based on the service profile. That is, the multicast router may discard the multicast service reception request message for the unsubscribed multicast channel and process only the multicast service reception request message for the subscribed multicast channel.

The service profile included in the multicast reception control switch and the multicast router may be preset before receiving the multicast service reception request message from the user, or may be obtained from an external server that processes the user's channel subscription request. The multicast reception control switch may acquire a service profile by exchanging messages through an interface with the multicast router.

A specific example is shown in FIG.

2 is a diagram illustrating an example of an IP multicast service reception control process when the multicast reception control switch has a service profile and performs manual snooping.

2, two multicast reception control switches 220 and 240 are connected to a multicast router. User A, User B, and User C 210 are connected to port 0, port 1, and port 2 of the multicast reception control switch 220, respectively, and port 0, port 1 of the multicast reception control switch 240, respectively. User D, User E and User F are connected to port 2 and port 2, respectively.

The multicast service reception control method will be described based on the user C 210.

User C 210 requests the use of a specific multicast channel 224.0.1.60 to multicast reception control switch 220 (211). This request may be performed through a multicast channel service reception request message such as 'IGMP join'.

Then, the multicast reception control switch 220 determines whether the user C 210 is subscribed to 224.0.1.60 using the service profile (221). The multicast reception control switch 220 may have a service profile. The multicast reception control switch 220 updates the snooping table based on the determination of subscription (222). That is, since user C 210 is not subscribed to 224.0.1.60, the multicast reception control switch 220 does not add port 2 to which user C 210 is connected to the snooping table.

If the user C 210 is subscribed to 224.0.1.60, the multicast reception control switch 220 may add the user C 210 to the snooping table. That is, port 2 corresponding to user C 210 may be added as a member of 224.0.1.60.

The multicast reception control switch 220 requests the multicast router 230 to transmit data for 224.0.1.60 to the multicast reception control switch 220 (223). This request may be performed by forwarding the multicast channel service reception request message received from user C 210 to multicast router 230.

When the multicast router 230 receives the data transmission request for 224.0.1.60, the multicast router 230 determines whether the user C 210 is subscribed to 224.0.1.60 using the service profile (231). Since user C 210 is not subscribed to 224.0.1.60, multicast router 230 discards the data transfer request for 224.0.1.60 (232).

If user C 210 is subscribed to 224.0.1.60, multicast router 230 transmits data for 224.0.1.60 to multicast reception control switch 220 (233).

The multicast reception control switch 220 controls the data corresponding to each multicast channel using the snooping table (224). That is, since only the port 1 is described as the port to which data for 224.0.1.60 is transmitted in the snooping table, the multicast reception control switch 220 receives data for only the user B corresponding to the port 1 to receive the data for 224.0.1.60. Can be controlled. That is, user C 210 not subscribed to 224.0.1.60 does not receive data for 224.0.1.60.

2. The multicast receive control switch has a service profile and Active Snooping of  If you do

When the multicast reception control switch has a service profile and performs active snooping, the multicast reception control switch grasps the contents of the multicast control message exchanged between the user and the multicast router. The multicast reception control switch updates the snooping table according to whether the user subscribes to the corresponding multicast channel using the service profile. This part is the same as for manual snooping. However, in active snooping, the multicast reception control switch may not forward the multicast control message to the multicast router depending on the situation .

For example, in the case of IGMP, if a second user requests IGMP Join while a first user subscribed to a specific multicast channel has already requested IGMP Join with the multicast receive control switch, the multicast receive control switch may be disabled. Update the snooping table for the user 2, but do not forward the IGMP Join request of the second user to the multicast router. This is because there is no need to send an IGMP Join request back to the multicast router because data for a specific multicast channel is already transmitted by the first user to the multicast reception control switch. Therefore, unnecessary data transfer request to the multicast router can be reduced.

In addition, the multicast reception control switch and the multicast router when performing active snooping may obtain a service profile in the same manner as in the case of passive snooping.

A specific example will be described with reference to FIG. 3.

3 is a diagram illustrating an example of an IP multicast service reception control process when the multicast reception control switch has a service profile and performs active snooping.

Referring to FIG. 3, two multicast reception control switches 320 and 340 are connected to a multicast router. User A, User B, and User C 310 are connected to port 0, port 1, and port 2 of the multicast reception control switch 320, respectively, and port 0, port 1 of the multicast reception control switch 340, respectively. User D, User E and User F are connected to port 2 and port 2, respectively.

A multicast service reception control method will be described based on the user C 310.

User C 310 requests the use of a specific multicast channel 224.0.1.60 to multicast reception control switch 320 (311). This request may be performed through a multicast channel service reception request message such as 'IGMP join'.

Then, the multicast reception control switch 320 determines whether the user C 310 is subscribed to 224.0.1.60 using the service profile (321). The multicast reception control switch 320 may have a service profile. The multicast reception control switch 320 updates the snooping table on the basis of the subscription decision (322). That is, since user C 310 is not subscribed to 224.0.1.60, the multicast reception control switch 320 does not add port 2 to which user C 310 is connected to the snooping table.

If the user C 310 is subscribed to 224.0.1.60, the multicast reception control switch 320 may add the user C 310 to the snooping table. That is, port 2 corresponding to user C 310 may be added as a member of 224.0.1.60. This is the same as for manual snooping.

The multicast reception control switch 320 determines whether data corresponding to 224.0.1.60, which is a multicast channel requested for use from the user C 310, is already received from the multicast router 330 (323). That is, the multicast reception control switch 320 determines whether data corresponding to 224.0.1.60 is already received by a request from another user. This determination may be performed using a snooping table.

Data corresponding to 224.0.1.60 has already been transmitted from the multicast router 330 to the multicast reception control switch 320 at the request of UserB. Therefore, the multicast reception control switch 320 does not forward the use request for the multicast channel 224.0.1.60 from the user C 310 to the multicast router 330. This can reduce the transmission of unnecessary messages.

The multicast reception control switch 320 controls the data corresponding to each multicast channel using the snooping table (325). That is, since only the port 1 is described as a port to which data for 224.0.1.60 is transmitted in the snooping table, the multicast reception control switch 320 receives data for only the user B corresponding to the port 1 to receive the data for 224.0.1.60. Can be controlled. That is, user C 310 not subscribed to 224.0.1.60 does not receive data for 224.0.1.60.

If data corresponding to 224.0.1.60, which is a multicast channel requested to be used by user C 310, is not already received from the multicast router 330, the multicast reception control switch 320 as in the case of manual snooping. The multicast router 330 may request to transmit the data for 224.0.1.60 to the multicast reception control switch 320 (324). Thereafter, the multicast router determines whether the user C 310 is subscribed (331), or discards the data transmission request based on the determination (332), or multicast reception control switch 320 to the data for 224.0.1.60 The process of transmitting to 333 is the same as the manual snooping described with reference to FIG. 2.

<< If the multicast receive control switch does not have a service profile ( Case2 ) >>

Even if the multicast reception control switch does not have a service profile, the multicast reception control switch updates the snooping table. However, unlike case1, once a request to receive a service is received, the user is assumed to be a legitimate user and added to the snooping table.

The multicast router may determine whether a specific user is subscribed to the requested multicast channel using the service profile. According to the control message generated from the multicast router based on the determination result, the multicast reception control switch may delete the port to which the user is connected from the snooping table.

1. The multicast receive control switch does not have a service profile manual Snooping of  If you do

The multicast reception control switch snoops on a multicast control message such as a multicast service reception request message and a multicast service reception stop message. However, since the multicast reception control switch does not have a service profile, there is a difference in case1 in updating the snooping table. In other words, when a multicast receive control switch receives a request from a user for using a particular multicast channel, the multicast receive control switch assumes that the user is a legitimate user and, in the snooping table, the port that the user is connected to is a member of the particular multicast channel. Add.

The multicast reception control switch may transmit a multicast service reception request message from a specific user to the multicast router. The multicast router can then filter the multicast service reception request message using the service profile. That is, the multicast router may discard the multicast service reception request message for the unsubscribed multicast channel and process only the multicast service reception request message for the subscribed multicast channel.

At this time, the multicast router not only discards the multicast service reception request message for the unsubscribed multicast channel but also controls the multicast reception control switch to correct an incorrectly updated snooping table for the unsubscribed channel. To send. The multicast reception control switch may delete a port corresponding to a specific user not subscribed to from a member of a specific multicast channel of the snooping table according to a control message from the multicast router.

The service profile provided by the multicast router may be preset before receiving the multicast service reception request message from the user. In addition, the service profile may be obtained from an external server that processes a user's channel subscription request.

A specific example will be described with reference to FIG. 4.

4 is a diagram illustrating an example of an IP multicast service reception control process when the multicast reception control switch performs manual snooping without a service profile.

Referring to FIG. 4, two multicast reception control switches 420 and 440 are connected to a multicast router. User A, User B, and User C 410 are connected to port 0, port 1, and port 2 of the multicast reception control switch 420, respectively, and port 0, port 1 of the multicast reception control switch 440. User D, User E and User F are connected to port 2 and port 2, respectively.

A multicast service reception control method will be described based on the user C 410.

User C 410 requests the use of a specific multicast channel 224.0.1.60 to multicast reception control switch 420 (411). This request may be performed through a multicast channel service reception request message such as 'IGMP join'.

The multicast reception control switch 420 then updates the snooping table (421). At this time, since the multicast reception control switch 420 does not have a service profile unlike case1, the multicast reception control switch 420 cannot determine whether the user C 410 is subscribed to 224.0.1.60. Accordingly, the multicast reception control switch 420 assumes that the user is a legitimate user and adds the user C 410 to the snooping table. That is, the multicast reception control switch 420 may add port 2 to which user C 410 is connected as a member of 224.0.1.60 in the snooping table.

The multicast reception control switch 420 requests the multicast router 430 to transmit data for 224.0.1.60 to the multicast reception control switch 420 (422). This request may be performed by forwarding the multicast channel service reception request message received from the user C 410 to the multicast router 430.

When the multicast router 430 receives the data transmission request for 224.0.1.60, the multicast router 430 determines whether the user C 410 is subscribed to 224.0.1.60 using the service profile (431).

Since user C 410 is not subscribed to 224.0.1.60, multicast router 430 sends a control message to multicast receive control switch 420 to delete port 2 from members of 224.0.1.60 of the snooping table ( 432). According to the control message, the multicast reception control switch 420 may delete the port 2 from the snooping table.

The multicast reception control switch 420 controls the data corresponding to each multicast channel using the snooping table (423). That is, since only the port 1 is described as a port to which data for 224.0.1.60 is transmitted in the snooping table, the multicast reception control switch 420 receives data for only the user B corresponding to port 1 to receive data for 224.0.1.60. Can be controlled. That is, user C 410 not subscribed to 224.0.1.60 does not receive data for 224.0.1.60.

If the user C 410 is subscribed to 224.0.1.60, the multicast router 430 does not transmit a control message for deleting the user C 410 from the snooping table, and multiplies the data corresponding to 224.0.1.60. Multicast routing may be performed by transmitting to the cast reception control switch 420 (433). User C 410 may then receive data corresponding to 224.0.1.60.

2. The multicast receive control switch does not have a service profile Active Snooping of  If you do

Unlike passive snooping, in the case of active snooping, the multicast reception control switch may not forward a multicast service reception request message from a specific user to the multicast router .

That is, if a legitimate reception request for the same multicast channel has already been received through the same multicast reception control switch, the multicast router is transmitting data for the multicast channel to the multicast reception control switch. Therefore, the multicast reception control switch does not request data transmission to the multicast router even if a new reception request for the multicast channel is received. That is, the multicast reception control switch may not forward the new multicast service reception request message to the multicast router. Instead, the multicast receive control switch may request the multicast router to confirm whether the new user is a legitimate user. A legitimate user is a user who is subscribed to the multicast channel. The request for confirmation whether the user is a legitimate user may be performed by using a control message defined separately. This allows the multicast router to know if there was a request for receiving a multicast service from the user.

Receiving a request to confirm whether the user is a legitimate user, the multicast router uses the service profile to determine whether the corresponding user is subscribed. If it is determined that the user is not subscribed, the control message for correcting the incorrectly updated snooping table for the unsubscribed channel is transmitted to the multicast reception control switch. The multicast reception control switch may delete a port corresponding to a specific user not subscribed to from a member of a specific multicast channel of the snooping table according to a control message from the multicast router.

The multicast router can obtain the service profile in the same manner as in the case of passive snooping.

A specific example will be described with reference to FIG. 5.

FIG. 5 is a diagram illustrating an example of an IP multicast service reception control process when the multicast reception control switch performs active snooping without a service profile.

Referring to FIG. 5, two multicast reception control switches 520 and 540 are connected to a multicast router. User A, User B, and User C 510 are connected to port 0, port 1, and port 2 of multicast reception control switch 520, respectively, and port 0, port 1 of multicast reception control switch 540. User D, User E and User F are connected to port 2 and port 2, respectively.

A multicast service reception control method will be described based on the user C 510.

User C (510) requests the use of a specific multicast channel (224.0.1.60) to the multicast reception control switch 520 (511). This request may be performed through a multicast channel service reception request message such as 'IGMP join'.

The multicast reception control switch 520 then updates the snooping table (521). At this time, since the multicast reception control switch 520 does not have a service profile unlike case1, the multicast reception control switch 520 cannot determine whether the user C 510 is subscribed to 224.0.1.60. Therefore, the multicast reception control switch 520 assumes that the user is a legitimate user and adds user C 510 to the snooping table. That is, the multicast reception control switch 520 may add port 2 to which user C 510 is connected as a member of 224.0.1.60 in the snooping table.

The multicast reception control switch 520 determines whether data corresponding to 224.0.1.60, which is a multicast channel requested by the user C 510, is already received from the multicast router 530 (522). That is, the multicast reception control switch 520 determines whether data corresponding to 224.0.1.60 has already been received by a request from another user. This determination may be performed using a snooping table.

Data corresponding to 224.0.1.60 has already been transmitted from the multicast router 530 to the multicast reception control switch 520 at the request of UserB. Accordingly, the multicast reception control switch 520 does not transmit a use request for the multicast channel 224.0.1.60 from the user C 510 to the multicast router 530. This can reduce the transmission of unnecessary messages. Instead, the multicast reception control switch 520 may request the multicast router 530 to confirm whether the user C 510 is subscribed to 224.0.1.60 (523). The request for confirmation of subscription may be performed using a separately defined control message.

When the multicast router 530 receives a request for confirmation of whether the user C 510 subscribes to 224.0.1.60, the multicast router 530 determines whether the user C 510 is subscribed to 224.0.1.60 using the service profile ( 531).

Because user C 510 is not subscribed to 224.0.1.60, multicast router 530 sends a control message to multicast receive control switch 520 to delete port 2 from members of 224.0.1.60 of the snooping table ( 532). According to the control message, the multicast reception control switch 520 may delete port 2 from the snooping table.

The multicast reception control switch 520 controls the data corresponding to each multicast channel using the snooping table (524). That is, since only the port 1 is described as a port to which data for 224.0.1.60 is transmitted in the snooping table, the multicast reception control switch 520 receives data for only the user B corresponding to the port 1 to receive the data for 224.0.1.60. Can be controlled. That is, user C 510 not subscribed to 224.0.1.60 does not receive data for 224.0.1.60.

If the data corresponding to 224.0.1.60, which is the multicast channel requested by the user C 510 in step 522, is not being received from the multicast router 530, the multicast reception control switch 520 subscribes. Instead of requesting confirmation 523, the process after step 522 may be performed in the same manner as in the case of manual snooping described with reference to FIG. 4.

The methods according to embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

6 is a functional block diagram of a multicast reception control switch according to an embodiment of the present invention.

Referring to FIG. 6, the multicast reception control switch 610 includes a memory 611, a processor 612, a port 613, and a port 614.

The memory 611 stores a service profile and a snooping table including information on a multicast channel to which each of the plurality of users is subscribed.

The processor 612 determines whether a specific user is subscribed to a specific multicast channel using the service profile, updates information about the specific user in the snooping table based on the determination result, and multicasts using the snooping table. Control data corresponding to a specific multicast channel transmitted from a router.

The processor 612 may determine whether the specific user is subscribed to the specific multicast channel using the service profile in response to the request for the specific user to use the specific multicast channel.

The processor 612 may request to the multicast router to send data corresponding to a particular multicast channel to the multicast receive control switch (manual snooping).

The processor 612 may request the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch according to whether or not data corresponding to the specific multicast channel is already received from the multicast router ( Active snooping).

Here, the multicast router may transmit data corresponding to a specific multicast channel to the multicast reception control switch based on the service profile and the request of the multicast reception control switch.

Port 613 is associated with a particular user.

Port 614 is connected to the multicast router.

So far, the multicast reception control switch according to the present invention has been described. Since the above description may be applied to the multicast reception control switch as described above with reference to FIGS. 1 to 5, the detailed description thereof will be omitted.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

120: network

Claims (19)

A memory storing a service profile and a snooping table including information on a multicast channel to which each of the plurality of users is subscribed; And
It is determined whether a specific user is subscribed to a specific multicast channel by using the service profile, updates information about the specific user in a snooping table based on the determination result, and uses the snooping table to multicast router. A processor controlling data corresponding to the specific multicast channel transmitted from the
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The processor
And determining whether the specific user is subscribed to a specific multicast channel using the service profile in response to the request for the specific user to use the specific multicast channel. delete A memory storing a service profile and a snooping table including information on a multicast channel to which each of the plurality of users is subscribed; And
It is determined whether a specific user is subscribed to a specific multicast channel by using the service profile, updates information about the specific user in a snooping table based on the determination result, and uses the snooping table to multicast router. A processor controlling data corresponding to the specific multicast channel transmitted from the
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The processor
And requesting the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch. A memory storing a service profile and a snooping table including information on a multicast channel to which each of the plurality of users is subscribed; And
It is determined whether a specific user is subscribed to a specific multicast channel by using the service profile, updates information about the specific user in a snooping table based on the determination result, and uses the snooping table to multicast router. A processor controlling data corresponding to the specific multicast channel transmitted from the
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The processor
A multicast requesting the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch according to whether data corresponding to the specific multicast channel is already received from the multicast router. Ingress control switch. A memory storing a service profile and a snooping table including information on a multicast channel to which each of the plurality of users is subscribed; And
It is determined whether a specific user is subscribed to a specific multicast channel by using the service profile, updates information about the specific user in a snooping table based on the determination result, and uses the snooping table to multicast router. A processor controlling data corresponding to the specific multicast channel transmitted from the
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The multicast router
And transmitting data corresponding to the specific multicast channel to the multicast reception control switch based on the service profile and the request of the multicast reception control switch. A memory in which a snooping table is stored; And
In response to a request for a specific user to use a specific multicast channel, update information about the specific user in a snooping table, control data corresponding to the specific multicast channel using the snooping table, and multicast A processor for updating the snooping table according to a control message for deleting the information about the specific user based on whether the specific user received from the router is subscribed to the specific multicast channel.
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The processor
The specific multicast according to a determination result of the multicast router as to whether the specific user using the service profile including information on the multicast channel to which each of the plurality of users is subscribed is subscribed to the specific multicast channel. Multicast reception control switch for receiving data corresponding to a channel. A memory in which a snooping table is stored; And
In response to a request for a specific user to use a specific multicast channel, update information about the specific user in a snooping table, control data corresponding to the specific multicast channel using the snooping table, and multicast A processor for updating the snooping table according to a control message for deleting the information about the specific user based on whether the specific user received from the router is subscribed to the specific multicast channel.
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The processor
And requesting the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch in response to a request for the specific user to use a specific multicast channel. A memory in which a snooping table is stored; And
In response to a request for a specific user to use a specific multicast channel, update information about the specific user in a snooping table, control data corresponding to the specific multicast channel using the snooping table, and multicast A processor for updating the snooping table according to a control message for deleting the information about the specific user based on whether the specific user received from the router is subscribed to the specific multicast channel.
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The processor
Multicast reception control requesting confirmation of whether the specific user is subscribed to the specific multicast channel according to whether or not data corresponding to the specific multicast channel is already received from the multicast router. switch. delete In response to a request of a multicast reception control switch regarding a specific multicast channel of a specific user, the specific user subscribes to the specific multicast channel by using a service profile including information on the multicast channel to which each of the plurality of users is subscribed. A processor for determining whether a connection is made; And
A transmitter configured to transmit data corresponding to the specific multicast channel to the multicast reception control switch according to a determination of the processor whether the specific user is subscribed to the specific multicast channel
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The multicast reception control switch request
A request for transmitting data corresponding to the specific multicast channel to the multicast reception control switch or a request for checking whether the specific user is subscribed to the specific multicast channel. In response to a request of a multicast reception control switch regarding a specific multicast channel of a specific user, the specific user subscribes to the specific multicast channel by using a service profile including information on the multicast channel to which each of the plurality of users is subscribed. A processor for determining whether a connection is made; And
A transmitter configured to transmit data corresponding to the specific multicast channel to the multicast reception control switch according to a determination of the processor whether the specific user is subscribed to the specific multicast channel
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The processor
If the specific user is not subscribed to the specific multicast channel, generate a control message to delete information about the specific user from a snooping table,
The transmitter
A multicast router for transmitting the control message to the multicast reception control switch. In response to a request of a multicast reception control switch regarding a specific multicast channel of a specific user, the specific user subscribes to the specific multicast channel by using a service profile including information on the multicast channel to which each of the plurality of users is subscribed. A processor for determining whether a connection is made;
A transmission unit for transmitting data corresponding to the specific multicast channel to the multicast reception control switch according to the processor's determination as to whether the specific user is subscribed to the specific multicast channel; And
Memory in which a service profile is stored that contains information about the multicast channel to which each of the plurality of users is subscribed
A multicast router. In response to a request of a multicast reception control switch regarding a specific multicast channel of a specific user, the specific user subscribes to the specific multicast channel by using a service profile including information on the multicast channel to which each of the plurality of users is subscribed. A processor for determining whether a connection is made;
A transmission unit for transmitting data corresponding to the specific multicast channel to the multicast reception control switch according to the processor's determination as to whether the specific user is subscribed to the specific multicast channel; And
Memory in which a service profile is stored that contains information about the multicast channel to which each of the plurality of users is subscribed
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The memory
And obtaining the service profile from an external server that processes channel subscription requests of the plurality of users. delete In the IP multicast service reception control method using a multicast reception control switch,
The multicast reception control switch updating information about the specific user in a snooping table of the multicast reception control switch in response to a request for a specific user to use a specific multicast channel;
In response to a request of the multicast reception control switch regarding the specific multicast channel of the specific user, a multicast router determines whether the specific user is subscribed to the specific multicast channel, and according to the determination result. Transmitting data corresponding to the specific multicast channel to the multicast reception control switch; And
Controlling, by the multicast reception control switch, data corresponding to the specific multicast channel using the snooping table;
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The multicast reception control switch request
The IP multicast service reception control method is a request for transmitting data corresponding to the specific multicast channel to the multicast reception control switch or a request for checking whether the specific user is subscribed to the specific multicast channel. . In the IP multicast service reception control method using a multicast reception control switch,
The multicast reception control switch updating information about the specific user in a snooping table of the multicast reception control switch in response to a request for a specific user to use a specific multicast channel;
Determining, by the multicast router, whether the specific user is subscribed to the specific multicast channel, and transmitting data corresponding to the specific multicast channel to the multicast reception control switch according to the determination result; And
Controlling, by the multicast reception control switch, data corresponding to the specific multicast channel using the snooping table;
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Updating the information about the specific user in the snooping table of the multicast reception control switch
The IP multicast service is a step of updating the snooping table according to whether the specific user is subscribed to the specific multicast channel by using a service profile including information on a multicast channel to which each of the plurality of users is subscribed. Receive control method. In the IP multicast service reception control method using a multicast reception control switch,
The multicast reception control switch updating information about the specific user in a snooping table of the multicast reception control switch in response to a request for a specific user to use a specific multicast channel;
Determining, by the multicast router, whether the specific user is subscribed to the specific multicast channel, and transmitting data corresponding to the specific multicast channel to the multicast reception control switch according to the determination result;
Controlling, by the multicast reception control switch, data corresponding to the specific multicast channel using the snooping table; And
The multicast reception control switch requesting the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch;
IP multicast service reception control method comprising a. In the IP multicast service reception control method using a multicast reception control switch,
The multicast reception control switch updating information about the specific user in a snooping table of the multicast reception control switch in response to a request for a specific user to use a specific multicast channel;
Determining, by the multicast router, whether the specific user is subscribed to the specific multicast channel, and transmitting data corresponding to the specific multicast channel to the multicast reception control switch according to the determination result;
Controlling, by the multicast reception control switch, data corresponding to the specific multicast channel using the snooping table; And
The multicast reception control switch requesting the multicast router to transmit data corresponding to the specific multicast channel to the multicast reception control switch;
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Requesting transmission of data corresponding to the specific multicast channel to the multicast reception control switch
Requesting transmission of data corresponding to the specific multicast channel to the multicast reception control switch according to whether the multicast reception control switch is already receiving data corresponding to the specific multicast channel from the multicast router. Steps to control IP multicast service reception. In the IP multicast service reception control method using a multicast reception control switch,
The multicast reception control switch updating information about the specific user in a snooping table of the multicast reception control switch in response to a request for a specific user to use a specific multicast channel;
Determining, by the multicast router, whether the specific user is subscribed to the specific multicast channel, and transmitting data corresponding to the specific multicast channel to the multicast reception control switch according to the determination result;
Controlling, by the multicast reception control switch, data corresponding to the specific multicast channel using the snooping table;
Sending, by the multicast router, a control message to the multicast reception control switch to delete information about the specific user from the snooping table when the specific user is not subscribed to the specific multicast channel; And
The multicast reception control switch updating the snooping table according to the control message
IP multicast service reception control method comprising a.

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