CN101771901B - Method of multicast permission control in passive optical network, system and multi-dwelling unit - Google Patents

Abstract

The invention provides a method, a system and a multi-dwelling unit MDU for realizing multicast authority control in a passive optical network. The method of the present invention receives the multicast service flow issued by the optical line terminal OLT according to the request of the user terminal; Multicast VLAN ID, judging whether the user terminal has the multicast VLAN ID in the unknown multicast learning table; forwarding or prohibiting forwarding of the multicast service flow issued by the optical line terminal to the user terminal, solving the problem of In the PON system, the control of user multicast authority is realized on the multi-dwelling unit MDU, and the configuration is simple, the authority control function is rich, and the cost of service distribution and maintenance is reduced.

Description

Method, system and multi-dwelling unit for multicast authority control in passive optical network

technical field

The invention relates to network technology in the field of communication, and specifically refers to a method, system and multi-residential unit for multicast authority control in a passive optical network.

Background technique

With the development of multimedia services such as streaming media, video conferencing, and video-on-demand in the Internet, multicast services have become an important service in the Internet. How to effectively manage multicast users and multicast resources while implementing multicast services, Diversification of multicast services has been increasingly adopted by multicast services.

At present, the multicast implemented on the DSLAM access device is more popularly the TR101 standard multicast, and its core is the multicast VLAN. In the TR101 standard, the multicast VLAN is used to distribute video multicast programs, and on the other hand, it is also used to control users who order programs in the multicast VLAN. In the networking structure when the multicast VLAN technology is applied to IPTV, it usually includes: user hosts, switching devices, routing devices and servers. Among them, the user host is used to send a join message for applying to join a certain multicast group or a leave message for applying to leave a certain multicast group to the switching device through its own VLAN domain according to the needs of the user for channel programs; It is used to send the joining message or leaving message from the user host to the routing device through the corresponding routing device port, and multicast the channel program stream from the routing device according to the joining message or leaving message (in specific implementation, the performance Multicast data message) is copied or deleted at the port corresponding to the user host; the routing device is used to request the server for the corresponding multicast stream according to the received joining message, and send the requested multicast stream to the switching device, And stop sending the multicast stream according to the leaving message of the last member in the multicast group corresponding to the multicast stream. In addition, the routing device will also send a query message for querying which multicast groups have members, so as to control the sending or stopping of the multicast stream according to the query result.

The inventors have found that the above method in the prior art has at least the following problems: In the passive optical network PON, the authority control of multicast is realized on the optical line terminal OLT. Due to the huge number of connected MDUs under each OLT, the OLT hardware The configuration is complex, the load is heavy, and too many configurations increase the cost of service provisioning and maintenance.

Contents of the invention

In view of this, the main purpose of the embodiments of the present invention is to provide a method, a system and a multi-dwelling unit for realizing multicast authority control in a passive optical network, which solves the problem of implementing user group access on a multi-dwelling unit MDU in a PON system. Broadcast authority control, simple configuration, rich authority control functions, and by dynamically learning the correspondence between multicast VLANs and multicast IP addresses, when multicast services are expanded, automatic configuration of multicast VLANs is realized, reducing service provisioning and maintenance the cost of.

In order to achieve the above object, embodiments of the present invention provide the following technical solutions:

A method for multicast authority control in a passive optical network, said method comprising: receiving a multicast service flow issued by an optical line terminal OLT according to a user terminal request; When the IP address information fails to match in the multicast forwarding table, take the multicast IP address information in the multicast service flow as an index, and obtain the multicast corresponding to the multicast IP address information in the unknown multicast learning table VLANID, the unknown multicast learning table is generated by pre-learning the multicast IP address information in the multicast service flow issued by the OLT and the VLAN ID corresponding to the multicast IP address information; judging whether the user terminal has The multicast VLAN ID in the unknown multicast learning table; if the user terminal has the multicast VLAN ID in the unknown multicast learning table, forward the group issued by the optical line terminal to the user terminal Broadcast business flow.

A multi-dwelling unit MDU, the MDU comprising:

The receiving unit is used for the multicast service flow sent by the optical line terminal OLT according to the request of the user terminal;

Acquisition unit, used for when the VLAN ID in the multicast service flow and the multicast IP address information fail to match in the multicast forwarding table, take the multicast IP address information in the multicast service flow as an index, in Obtain the multicast VLAN ID corresponding to the multicast IP address information in the unknown multicast learning table, and the unknown multicast learning table is to learn the multicast IP address information in the multicast service flow issued by the OLT in advance and the The VLAN ID corresponding to the multicast IP address information is generated;

Judging unit, for obtaining the multicast VLANID corresponding to the multicast IP address information according to the obtaining unit, judging whether the user terminal has the multicast VLAN ID in the unknown multicast learning table, and sending the judgment result to first processing unit;

The first processing unit is configured to, according to the judgment result sent by the judging unit, if the user terminal has the multicast VLAN ID in the unknown multicast learning table, then forward the optical line terminal issued by the user terminal to the user terminal Multicast traffic.

A multicast authority control system in a passive optical network, said system comprising: at least one multi-dwelling unit MDU and an optical line terminal OLT;

The MDU is used to receive the multicast service flow issued by the optical line terminal OLT according to the user terminal request; when the VLAN ID in the multicast service flow fails to match the multicast IP address information in the multicast forwarding table, Taking the multicast IP address information in the multicast service flow as an index, obtain the multicast VLAN ID corresponding to the multicast IP address information in the unknown multicast learning table, and the unknown multicast learning table is obtained by prior Learning the multicast IP address information in the multicast service flow sent by the OLT and the VLAN ID corresponding to the multicast IP address information generation; judging whether the user terminal has the multicast VLAN in the unknown multicast learning table ID; if the user terminal has the multicast VLAN ID in the unknown multicast learning table, forward the multicast service flow issued by the optical line terminal to the user terminal;

The OLT is configured to send the multicast service flow to the MDU according to the request sent by the MDU to join the multicast group.

Embodiments of the present invention receive the multicast service flow sent by the optical line terminal OLT according to the request of the user terminal; when the VLAN ID in the multicast service flow and the multicast IP address information fail to match in the multicast forwarding table, the The multicast IP address information in the multicast service flow is an index, and the multicast VLAN ID corresponding to the multicast IP address information is obtained in the unknown multicast learning table, and the unknown multicast learning table is obtained through pre-learning The multicast IP address information in the multicast service flow issued by OLT and the VLAN ID corresponding to the multicast IP address information are generated; judge whether the user terminal has the multicast VLAN ID in the unknown multicast learning table ; If the user terminal has the multicast VLAN ID in the unknown multicast learning table, then forward the multicast service flow issued by the optical line terminal to the user terminal, solving the problem of passing multiple broadcasts in the PON system The multicast authority control of the user is realized on the MDU of the residential unit, the configuration is simple, the authority control function is rich, and by dynamically learning the corresponding relationship between the multicast VLAN and the multicast IP address, the automatic configuration of the multicast VLAN is realized when the multicast service is expanded. , reducing the cost of service provisioning and maintenance.

Description of drawings

Fig. 1 is a method for multicast authority control in a passive optical network in an embodiment of the present invention;

FIG. 2 is a flow chart of a specific implementation method for a user terminal to go online in a passive optical network in an embodiment of the present invention;

Fig. 3 is a dynamic update flow chart of an unknown multicast learning table in a passive optical network in an embodiment of the present invention;

FIG. 4 is a flowchart of a specific implementation method for a user terminal offline in a passive optical network in an embodiment of the present invention;

5 is a schematic diagram of the composition and structure of a multi-dwelling unit MDU in an embodiment of the present invention;

FIG. 6 is a schematic diagram of the composition and structure of a multicast authority control system in a passive optical network in an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

A method for realizing multicast authority control in a passive optical network in an embodiment of the present invention, specifically:

Step S100, receiving the multicast service flow delivered by the optical line terminal OLT according to the request of the user terminal.

The multi-dwelling unit MDU receives a user terminal's request to join a multicast group, the request is an IGMP join message, and receives the multicast service flow sent by the OLT according to the request to join the multicast group.

Step S102, when the VLAN ID in the multicast service flow and the multicast IP address information fail to match in the multicast forwarding table, take the multicast IP address information in the multicast service flow as an index, in the unknown group Obtain the multicast VLAN ID corresponding to the multicast IP address information in the broadcast learning table, and the unknown multicast learning table is the multicast IP address information and the information related to the multicast service flow issued by the OLT through pre-learning The VLAN ID corresponding to the multicast IP address information is generated.

The unknown multicast learning table is stored on the MDU, and is dynamically updated by learning the VLAN ID and the multicast IP address information in the multicast traffic flow issued by the OLT.

Step S104, judging whether the user terminal has the multicast VLANID in the unknown multicast learning table.

This step is specifically: take the obtained multicast VLAN ID corresponding to the multicast IP address information as an index, search the multicast on-demand relationship table stored on the MDU, and obtain the list of user terminals, wherein the multicast The on-demand relationship table is pre-configured in the MDU.

According to the user terminal provided by the user terminal list, find out whether the user terminal in the user terminal authority table has the program authority to watch the program in the multicast VLAN, wherein the user terminal authority table records: the multicast VLAN ID and the user The corresponding relationship of terminal permissions is pre-configured on the MDU.

Step S106, if the user terminal has the multicast VLAN ID in the unknown multicast learning table, then forward the multicast service flow issued by the optical line terminal to the user terminal.

According to the search result, the MDU forwards or prohibits forwarding the multicast service flow issued by the optical line terminal to the user terminal, that is, if the search is successful, it forwards the multicast service flow issued by the optical line terminal to the user terminal; if the search fails, it prohibits Forward the multicast service flow delivered by the optical line terminal to the user terminal.

In the embodiment of the present invention, by receiving the multicast service flow issued by the OLT, the multicast IP address information in the multicast service flow is used as an index to search the unknown multicast learning table, and obtain the information corresponding to the multicast IP address information. Multicast VLAN ID, the unknown multicast learning table is generated by pre-learning the multicast IP address information in the multicast service flow issued by the OLT and the VLAN ID corresponding to the multicast IP address information; by judging the Whether the user terminal has the multicast VLAN ID in the unknown multicast learning table; if the user terminal has the multicast VLAN ID in the unknown multicast learning table, forward the optical line terminal to the user terminal According to the corresponding relationship between the multicast VLAN ID and the user terminal authority, the multicast service flow issued matches the multicast VLAN ID with the multicast VLANID in the corresponding relationship; according to the matching result, forwards to the user terminal Or prohibit the forwarding of the multicast service flow delivered by the optical line terminal, which solves the problem of controlling the user multicast authority on the multi-dwelling unit MDU in the PON system. The configuration is simple, the authority control function is rich, and through dynamic learning of multicast The corresponding relationship between VLAN and multicast IP address enables the automatic configuration of multicast VLAN when the multicast service is expanded, reducing the cost of service provisioning and maintenance.

Please refer to FIG. 2 . FIG. 2 is a flowchart of a specific implementation method for a user terminal to go online in a passive optical network in an embodiment of the present invention.

Step S200, receiving a request from a user terminal to join a multicast group.

The multi-dwelling unit MDU receives a user terminal's request to join a multicast group, and the request is an IGMP join message.

Step S202, according to the request to join the multicast group, receive the multicast service flow from the OLT.

The MDU sends the request to join the multicast group sent by the user terminal to the OLT, and receives the multicast service flow from the OLT.

Step S204, according to the VLAN ID and the multicast IP address in the multicast service flow issued by the OLT, combine the VLAN ID and the multicast IP address in the multicast service flow with the VLANID and the multicast IP address in the multicast forwarding table address to match.

Wherein, the multicast forwarding table is stored on the MDU, and the multicast forwarding table is: a correspondence table of the multicast VLANID, the multicast IP address and the multicast replication list, specifically as shown in Table 1:

Table 1 - Multicast Forwarding Table

serial number Multicast VLAN ID Multicast IP address Multicast replication list

Match the VLAN ID and the multicast IP address in the multicast traffic flow with the VLAN ID and the multicast IP address in the multicast forwarding table.

If the matching is successful, step S206 is performed; if the matching fails, steps S208 to S216 are further performed.

Step S206, if the matching is successful, copy and forward the corresponding multicast service flow to the user terminal according to the multicast replication list in the multicast forwarding table.

Step S208, if the matching fails, take the multicast IP address information in the multicast service flow as an index, search the unknown multicast learning table, and obtain the multicast VLAN ID corresponding to the multicast IP address information, the unknown The multicast learning table is obtained by learning the VLAN ID and multicast IP address information in the multicast service flow delivered by the OLT.

Described unknown multicast learning table is the correspondence table of multicast VLAN ID and multicast IP address, and described unknown multicast learning table is stored on MDU, and by learning the VLANID and group in the multicast business flow that OLT delivers The broadcast IP address information is dynamically updated. See Table 2 for details.

Table 2 - Unknown multicast learning table

serial number Multicast VLAN ID Multicast IP address

Taking the multicast IP address information in the multicast service flow as an index, searching the unknown multicast learning table, and obtaining the multicast VLAN ID corresponding to the multicast IP address information. Specifically, the process of dynamically updating the unknown multicast learning table will be described in detail in FIG. 3 below.

Step S210, using the multicast VLAN ID in the multicast service flow as an index, searching the multicast on-demand relationship table to obtain the list of user terminals.

Wherein, the multicast-on-demand relationship table is a corresponding relationship table of multicast VLAN ID, multicast IP address and user terminal list, specifically shown in Table 3-multicast-on-demand relationship table:

Table 3 - Multicast on-demand relationship table

serial number Multicast VLAN ID Multicast IP address List of user terminals

Step S212, according to the user terminal provided by the user terminal list, check whether the user terminal has the right to watch programs in the multicast VLAN in the user terminal authority table. If the search is successful, execute step S214; if the search fails, execute step S216.

Wherein, the user terminal authority table is: the corresponding relationship between multicast VLAN ID, user terminal and user terminal authority.

Table 4 - User Terminal Permission Table

serial number Multicast VLAN ID user terminal User terminal permissions

Wherein, whether the user terminal in the user terminal authorization table has the program authority to watch in the multicast VLAN is to judge whether the user terminal has the multicast VLAN ID in the unknown multicast learning table.

Step S214, if the search is successful, add the user terminal to the multicast copy list in Table 1-Multicast Forwarding Table, and copy and forward the multicast service flow issued by the optical line terminal to the user terminal;

If the search is successful, it means that the user terminal has the multicast VLAN ID in the unknown multicast learning table, then forward the multicast service flow issued by the OLT.

Step S216, if the search fails, prohibiting forwarding of the multicast service flow to the user terminal.

If the search fails, it indicates that the user terminal has no right to watch the programs in the multicast VLAN.

As can be seen from the specific implementation scheme provided by the above-mentioned embodiments of the present invention, the multicast IP address information in the multicast service flow issued by the OLT is used as an index to search the unknown multicast learning table, and obtain the information related to the group The multicast VLAN ID corresponding to the multicast IP address information, the unknown multicast learning table is obtained by learning the VLAN ID and the multicast IP address information in the multicast service flow issued by the OLT; according to the multicast VLAN ID and user terminal authority The corresponding relationship between the multicast VLAN ID and the multicast VLAN ID in the corresponding relationship is matched; according to the matching result, the multicast service flow issued by the optical line terminal is forwarded or prohibited to be forwarded to the user terminal, and the solution is solved In the PON system, the user multicast authority control is realized on the multi-dwelling unit MDU, the configuration is simple, the authority control function is rich, and by dynamically learning the corresponding relationship between the multicast VLAN and the multicast IP address, the time when the multicast service is expanded , realize the automatic configuration of multicast VLAN, and reduce the cost of service provisioning and maintenance.

The dynamic update process of the unknown multicast learning table will be described in detail below, please refer to FIG. 3 , which is a flow chart of dynamic updating of the unknown multicast learning table in a passive optical network in an embodiment of the present invention.

Steps S300 to S306 are the same as steps S200 to S206 described in FIG. 2 , and will not be described in detail here.

Step S308, if the matching fails, an interruption is triggered, and at the same time, the multicast IP address information in the received multicast service flow is used as an index to search for an unknown multicast learning table, and the multicast IP address in the multicast service flow is Match with the IP address in the unknown multicast learning table.

If the matching is successful, step S310 is executed, and then step S312 is executed; if the matching is unsuccessful, step S312 is directly executed.

In step S310, if the matching is successful, delete the original multicast VLAN ID entry and the multicast IP address entry in the unknown multicast learning table, and delete the multicast VLAN ID entry and the multicast IP address entry in Table 2-multicast forwarding table simultaneously. After the multicast IP address entry, step S212 is performed again, that is, in the unknown multicast learning table, the corresponding relationship between the corresponding multicast VLAN ID and the multicast IP address information is added.

Specifically: if the matching is successful, it means that the correspondence between the original multicast VLAN ID and the multicast IP address in the unknown multicast learning table changes, and it is necessary to delete the original correspondence and add a new correspondence.

In step S312, if the matching fails, the correspondence between the corresponding multicast VLANID and the multicast IP address information is added in the unknown multicast learning table, and the correspondence is added in Table 1-multicast forwarding table at the same time .

Specifically: if the matching fails, it means that the newly added corresponding relationship needs to be added to Table 2 - Unknown Multicast Learning Table and Table 1 - Multicast Forwarding Table through learning.

As can be seen from the specific implementation scheme provided by the above-mentioned embodiments of the present invention, when the VLAN ID and the multicast IP address information in the multicast service flow issued by the OLT and the multicast VLAN ID and the multicast IP address information in the multicast forwarding table When the addresses do not match, the unknown multicast learning table increases the corresponding multicast VLAN ID and multicast IP address information in the unknown multicast learning table by learning the VLAN ID and the multicast IP address information in the multicast service flow issued by the OLT. The corresponding relationship of multicast IP address information realizes the automatic configuration of multicast VLAN, enhances the scalability of multicast services, and reduces the cost of service provisioning and maintenance.

The following describes the offline process of the user terminal, please refer to FIG. 4 , which is a flowchart of a specific implementation method for a user terminal offline in a passive optical network in an embodiment of the present invention.

Step S400, receiving a leaving message sent by a user terminal, where the leaving message carries multicast IP address information.

Step S402, using the multicast IP address information carried in the leaving message as an index, searching an unknown multicast learning table to obtain a multicast VLAN ID corresponding to the multicast IP address information.

Step S404, according to the multicast VLAN ID information, delete the user terminal from the multicast on-demand relationship table.

Step S406, when the user terminal is the last user terminal to watch the multicast VLAN, delete the multicast VLAN ID and the multicast IP address information in the multicast forwarding table, and delete the information in the unknown multicast learning table simultaneously. Multicast VLAN ID and multicast IP address information.

As can be seen from the specific implementation scheme provided by the above-mentioned embodiments of the present invention, the multicast IP address information carried in the leaving message is used as an index to search the unknown multicast learning table, and obtain the information corresponding to the multicast IP address information. The multicast VLAN ID; according to the multicast VLAN ID information, delete the user terminal from the multicast on-demand relationship table, so that when the multicast service is expanded, the automatic configuration of the multicast VLAN is realized, and the service distribution and maintenance are reduced. the cost of.

Please refer to FIG. 5 . FIG. 5 is a schematic diagram of the composition and structure of a multi-dwelling unit MDU in an embodiment of the present invention.

A multi-dwelling unit MDU provides multiple access methods through LSW/FPGA/ASIC switching chips, such as: ADSL access, VDSL access, ETH access, etc., and provides rich uplink methods through LSW/FPGA/ASIC switching chips , such as: GPON uplink, EPON uplink, GE uplink, etc.

The MDU specifically includes: a receiving unit 500 , an acquiring unit 502 , and a first processing unit 504 .

The receiving unit 500 is configured to receive the multicast service flow sent by the optical line terminal OLT according to the request of the user terminal.

The obtaining unit 502 is configured to use the multicast IP address information in the multicast service flow as an index when the VLANID in the multicast service flow fails to match the multicast IP address information in the multicast forwarding table , obtain the multicast VLAN ID corresponding to the multicast IP address information in the unknown multicast learning table, the unknown multicast learning table is the multicast IP address information in the multicast service flow sent by the pre-learned OLT And the VLAN ID corresponding to the multicast IP address information is generated.

The judging unit 504 is used to obtain the multicast VLAN ID corresponding to the multicast IP address information according to the obtaining unit, judge whether the user terminal has the multicast VLAN ID in the unknown multicast learning table, and pass the judgment result sent to the first processing unit;

The acquiring unit 504 specifically includes:

The first query unit 5042 is configured to use the multicast IP address information carried in the request as an index, search the multicast on-demand relationship table stored in the storage unit, and obtain the user terminal list;

The second matching unit 5044 is configured to, according to the user terminal provided by the user terminal list, search whether the user terminal in the user terminal authority table has the authority to watch programs in the multicast VLAN;

The second processing unit 5046, according to the matching result of the second matching unit, if the search is successful, the user forwards the multicast service flow issued by the optical line terminal to the user terminal; The multicast service flow delivered by the line terminal.

The first processing unit 506 is configured to forward the optical line terminal to the user terminal if the user terminal has the multicast VLAN ID in the unknown multicast learning table according to the judgment result sent by the judgment unit Delivered multicast service flow.

The MDU further includes: a storage unit 508 for storing an unknown multicast learning table, a multicast on-demand relationship table, a multicast forwarding table, and a user terminal authority relationship table.

Wherein, the unknown multicast learning table updates the unknown multicast learning table by dynamically learning the multicast VLAN ID and the multicast IP address information in the multicast service flow issued by the OLT. For the content of the specific table, please refer to the implementation Table 2 in Example 2.

The multicast forwarding table and the user terminal authority table are pre-configured. For the content of the specific table, please refer to Table 1 and Table 3 of Embodiment 3; The information carried is dynamically updated.

The MDU also includes: a matching processing unit 510, configured to match the VLAN ID and the multicast IP address in the multicast service flow with the group The VLAN ID in the broadcast forwarding table is matched with the multicast IP address; if the match fails, the multicast service flow is forwarded to the acquisition unit for processing.

When the MDU dynamically updates the unknown multicast learning table, it also includes: a first matching unit 512, configured to combine the multicast IP address information in the multicast service flow with the multicast IP address information in the unknown multicast learning table. Address information is matched, and described unknown multicast learning table is the correspondence table of multicast VLAN ID and multicast IP address;

The first dynamic update unit 514 is used to increase the correspondence between the corresponding multicast VLAN ID and the multicast IP address information in the unknown multicast learning table when the first matching unit is unsuccessfully matched; or,

When the first matching unit was successfully matched, after deleting the correspondence between the original multicast VLAN ID and the multicast IP address information in the unknown multicast learning table, increase the correspondence between the corresponding multicast VLAN ID and the multicast IP address information .

When the MDU receives the leaving message sent by the user terminal, the MDU further includes:

The second receiving unit 516 is configured to receive a leaving message sent by the user terminal, where the leaving message carries multicast IP address information;

The second dynamic updating unit 518 is used to take the multicast IP address information carried in the leaving message as an index, search the unknown multicast learning table, and obtain the multicast VLAN ID corresponding to the multicast IP address information; The multicast VLAN ID information is deleted from the multicast on-demand relationship table for the user terminal.

When the user terminal is the last user terminal, the MDU further includes:

The 3rd dynamic updating unit 520, is used for when described user terminal is last user terminal, deletes the multicast VLAN ID and the multicast IP address information in the multicast forwarding table, deletes simultaneously in the described unknown multicast learning table Multicast VLAN ID and multicast IP address information.

The embodiment of the present invention provides an MDU. The MDU includes: a receiving unit, an acquiring unit, and a first processing unit, which satisfy different forms of access, provide rich uplink modes, and solve the problem of multiple The multicast authority control of the user is realized on the MDU of the residential unit, the configuration is simple, the authority control function is rich, and by dynamically learning the corresponding relationship between the multicast VLAN and the multicast IP address, the automatic configuration of the multicast VLAN is realized when the multicast service is expanded. , reducing the cost of service provisioning and maintenance.

Please refer to FIG. 6 . FIG. 6 is a schematic structural diagram of a multicast authority control system in a passive optical network according to an embodiment of the present invention.

A multicast authority control system in a passive optical network, the system includes: at least one multi-dwelling unit optical line terminal OLT602 and MDU604, and the specific functions completed by each module are as follows:

The OLT 602 is configured to send a multicast service flow to the MDU according to the request sent by the MDU to join the multicast group.

The MDU604 is used to receive the multicast service flow issued by the optical line terminal OLT according to the request of the user terminal;

When the VLAN ID in the multicast service flow and the multicast IP address information failed to match in the multicast forwarding table, the multicast IP address information in the multicast service flow was used as an index, in the unknown multicast learning table Obtain the multicast VLAN ID corresponding to the multicast IP address information, the unknown multicast learning table is the multicast IP address information and the multicast IP address information in the multicast service flow sent by the OLT through pre-learning The VLAN ID corresponding to the address information generates; judge whether the user terminal has the multicast VLANID in the unknown multicast learning table; if the user terminal has the multicast VLAN ID in the unknown multicast learning table, then to The user terminal forwards the multicast service flow delivered by the optical line terminal.

Wherein, the MDU provides multiple access methods through the LSW/FPGA/ASIC switching chip, such as: ADSL access, VDSL access, ETH access, etc., and provides rich uplink methods through the LSW/FPGA/ASIC switching chip, For example: GPON uplink, EPON uplink, GE uplink, etc.

The embodiment of the present invention provides a multicast authority control system in a passive optical network. The system includes: at least one multi-dwelling unit MDU and an optical line terminal OLT, which satisfies different forms of access and provides a variety of uplink modes. , solves the problem of multicast authority control on the multi-dwelling unit MDU in the PON system. The configuration is simple, the authority control function is rich, and by dynamically learning the corresponding relationship between the multicast VLAN and the multicast IP address, the multicast service During expansion, the automatic configuration of multicast VLAN is realized, which reduces the cost of service provisioning and maintenance.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (13)

1. A method for multicast permission control in a passive optical network, the method comprising:

receiving a multicast service stream issued by a light receiving line terminal OLT according to a user terminal request;

when the matching of the VLAN ID in the multicast service stream and the multicast IP address information fails in a multicast forwarding table, the multicast VLAN ID corresponding to the multicast IP address information is obtained in an unknown multicast learning table by taking the multicast IP address information in the multicast service stream as an index, and the unknown multicast learning table is generated by learning the multicast IP address information in the multicast service stream issued by an OLT in advance and the VLAN ID corresponding to the multicast IP address information;

judging whether the user terminal has the multicast VLAN ID in the unknown multicast learning table;

and if the user terminal has the multicast VLAN ID in the unknown multicast learning table, forwarding the multicast service stream issued by the optical line terminal to the user terminal.

2. The method of claim 1, wherein the matching of the VLAN ID and the multicast IP address information in the multicast service stream in the multicast forwarding table specifically comprises:

according to the VLAN ID and the multicast IP address in the multicast service stream issued by the OLT, the VLAN ID and the multicast IP address in the multicast service stream are matched with the VLAN ID and the multicast IP address in the multicast forwarding table.

3. The method of claim 1, wherein the generating of the unknown multicast learning table for learning in advance multicast IP address information in a multicast service stream delivered by an OLT and a VLAN ID corresponding to the multicast IP address information specifically comprises:

matching multicast IP address information in the multicast service stream with multicast IP address information in the unknown multicast learning table, wherein the unknown multicast learning table is a corresponding relation table of multicast VLAN IDs and multicast IP addresses;

if the matching fails, adding a corresponding relation between the multicast VLAN ID and the multicast IP address information in the unknown multicast learning table;

and if the matching is successful, deleting the corresponding relation between the original multicast VLAN ID and the multicast IP address information in the unknown multicast learning table, and then increasing the corresponding relation between the corresponding multicast VLAN ID and the multicast IP address information.

4. The method according to claim 1, wherein the determining whether the ue has the multicast VLAN ID in the unknown multicast learning table specifically comprises:

searching a multicast on-demand relation table by taking the obtained multicast VLAN ID corresponding to the multicast IP address information as an index, and obtaining a user terminal list;

and searching whether the user terminal has the program authority in the multicast VLAN in a user terminal authority list according to the user terminal provided by the user terminal list.

5. The method of claim 1, wherein the determining whether the user terminal has a multicast VLAN ID in the unknown multicast learning table further comprises:

and if the user terminal does not have the multicast VLAN ID in the unknown multicast learning table, the user terminal is forbidden to forward the multicast service stream issued by the optical line terminal.

6. The method of claim 1, further comprising:

receiving a leaving message sent by a user terminal, wherein the leaving message carries multicast IP address information;

searching an unknown multicast learning table by taking the multicast IP address information carried in the leaving message as an index, and acquiring a multicast VLAN ID corresponding to the multicast IP address information;

and deleting the user terminal from a multicast on-demand relation table according to the multicast VLAN ID information.

7. A multi-dwelling unit, MDU, comprising:

a receiving unit, configured to receive a multicast service stream issued by a light line terminal OLT according to a request of a user terminal;

an obtaining unit, configured to, when matching between a VLAN ID in the multicast service stream and multicast IP address information fails in a multicast forwarding table, obtain, in an unknown multicast learning table, a multicast VLAN ID corresponding to the multicast IP address information by using the multicast IP address information in the multicast service stream as an index, where the unknown multicast learning table is generated by learning, in advance, the multicast IP address information in the multicast service stream issued by an OLT and the VLAN ID corresponding to the multicast IP address information;

the judging unit is used for judging whether the user terminal has the multicast VLAN ID in the unknown multicast learning table or not according to the multicast VLAN ID corresponding to the multicast IP address information obtained by the obtaining unit, and sending the judgment result to the first processing unit;

and the first processing unit is used for forwarding the multicast service stream sent by the optical line terminal to the user terminal if the user terminal has the multicast VLAN ID in the unknown multicast learning table according to the judgment result sent by the judgment unit.

8. The MDU of claim 7, further comprising:

and the storage unit is used for storing an unknown multicast learning table, a multicast on-demand relation table, a multicast forwarding table and a user terminal authority relation table.

9. The MDU of claim 7, further comprising:

the matching processing unit is used for matching the VLAN ID and the multicast IP address in the multicast service stream with the VLAN ID and the multicast I P address in the multicast forwarding table according to the VLAN ID and the multicast IP address in the multicast service stream issued by the OLT; and if the matching fails, forwarding the multicast service flow to an acquisition unit for processing.

10. The MDU of claim 7, further comprising:

a first matching unit, configured to match multicast IP address information in the multicast service stream with multicast IP address information in the unknown multicast learning table, where the unknown multicast learning table is a table of correspondence between multicast VLAN IDs and multicast IP addresses;

the first dynamic updating unit is used for increasing the corresponding relation between the corresponding multicast VLAN ID and the multicast IP address information in the unknown multicast learning table when the first matching unit is unsuccessfully matched; or,

and when the first matching unit is successfully matched, deleting the corresponding relation between the original multicast VLAN ID and the multicast IP address information in the unknown multicast learning table, and increasing the corresponding relation between the corresponding multicast VLAN ID and the multicast IP address information.

11. The MDU of claim 7, wherein the determining unit specifically includes:

the first query unit is used for searching the multicast on-demand relation table stored in the storage unit by taking the multicast IP address information carried in the request as an index to obtain a user terminal list;

a second matching unit, configured to search, according to the user terminal provided by the user terminal list, whether the user terminal in the user terminal permission list has a program permission to view the multicast VLAN;

the second processing unit is used for forwarding the multicast service stream issued by the optical line terminal to the user terminal if the user successfully searches according to the matching result of the second matching unit; if the search is unsuccessful, forbidding to forward the multicast service stream issued by the optical line terminal to the user terminal.

12. The MDU of claim 7, further comprising:

a second receiving unit, configured to receive a leaving message sent by a user terminal, where the leaving message carries multicast IP address information;

a second dynamic updating unit, configured to look up an unknown multicast learning table by using the multicast IP address information carried in the leave packet as an index, and obtain a multicast VLAN ID corresponding to the multicast IP address information; and deleting the user terminal from a multicast on-demand relation table according to the multicast VLAN ID information.

13. A multicast permission control system in a passive optical network, the system comprising: at least one multi-dwelling unit MDU and an optical line terminal OLT;

the MDU is used for receiving a multicast service stream issued by the optical line terminal OLT according to a request of the user terminal; when the matching of the VLAN ID in the multicast service stream and the multicast IP address information fails in a multicast forwarding table, the multicast VLAN ID corresponding to the multicast IP address information is obtained in an unknown multicast learning table by taking the multicast IP address information in the multicast service stream as an index, and the unknown multicast learning table is generated by learning the multicast IP address information in the multicast service stream issued by an OLT in advance and the VLAN ID corresponding to the multicast IP address information; judging whether the user terminal has the multicast VLAN ID in the unknown multicast learning table; if the user terminal has the multicast VLAN ID in the unknown multicast learning table, forwarding the multicast service stream issued by the optical line terminal to the user terminal;

and the OLT is used for sending the multicast service stream to the MDU according to the multicast group joining request sent by the MDU.

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