CN102611606A - Method and device for separating multicast service - Google Patents
Method and device for separating multicast service Download PDFInfo
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Abstract
The invention provides a method for separating a multicast service and a device for separating the multicast service, wherein the method comprises the following steps: a network element confirms a first PVC(permanent virtual circuit) and a second PVC according to the current multicast service; the network element receives a multicast protocol message of the current multicast service by the first PVC; and the network element sends the multicast data stream of the current multicast service by the second PVC. According to the method for separating the multicast service and the device for separating the multicast service, the PVC is bounded with the multicast protocol message and the multicast data stream, so that the problem that the multicast service is unstable caused by the impact of large-capacity multicast media data on the multicast protocol is solved, the safety of the network is improved, and effective service separation is achieved.
Description
Technical field
The present invention relates to the multicast service field, especially relate to a kind of partition method and device of multicast service.
Background technology
Along with the high speed development of Internet and the rapid expansion of scale, on Internet, produced many new application, wherein much be the multimedia application of high bandwidth, such as network teleconference, quotations on the stock market issue, multimedia remote education etc.This rapid consumption and network congestion problem with regard to having brought bandwidth.In order to alleviate network bottleneck, people put forward various plans, and wherein a kind of is to adopt multicasting technology, and it is a kind of technology that can utilize existing bandwidth to greatest extent.
Multicast is to utilize a kind of agreement single packet to be sent to a plurality of recipients' (once, simultaneously) network technology from one or more senders (multicast source).Multicast source sends to particular multicast group to packet, and the address that only belongs to this multicast group just can receive packet.Briefly; Main frame is through using multicast protocol IGMP (Internet GroupManagement Protocol; The multicast protocol of IPV4) or after MLD (Multicast Listener Discovery, the multicast protocol of IPV6) adds certain multicast group, receives packet; And can dynamically leave this multicast group, the interrupt data bag.Compare with broadcasting (broadcast) or clean culture (unicast), multicast efficient is very high.Because broadcast mode not only can send to unwanted main frame and waste bandwidth with information, can not realize the transmission of inter-network section; Mode of unicast, the IP of repetition (Internet protocol) bag not only can take massive band width, also can increase the load of source host.And the multicast mode, as long as multicast source sends a piece of data, all recipients in the multicast group can receive same data copy, and the main frame that does not belong to this multicast group then can not receive, can save the network bandwidth like this and reduce offered load.
At present; DSLAM (Digital Subscriber Line Access Multiplexer; Digital subscriber line access multiplex), PON (Passive Optical Network; Passive optical-fiber network) in the application, user's business is more and more abundanter, as PPPOE (PPPOverEthernet) dial up on the telephone, narrowband telephone, IPTV (IPTV) etc.These business can be passed through such as a modem (modulator-demodulator) and BRAS (BroadBand Network Access Server; BAS Broadband Access Server) link of setting up between is accomplished; Especially IPTV is professional, often accounts for very much bandwidth, if these customer services are not taked quarantine measures; Tend to cause interfere with each other, certainly will not reach user's needs.Existing isolation technology is mainly isolated through VLAN (Virtual Local Area Network, VLAN).For modem, can also pass through PVC (Permanent Virtual Circuit, permanent virtual circuit) and isolate business, such as dialling up on the telephone with PVC 1, IPTV is professional with PVC 2, and like this, two business are not disturbed mutually.The mapping of PVC and VLAN can be one to one, also can be many-one.But for multicast service, multicast protocol message and multicast traffic stream use same PVC, and the multicast protocol message tends to given impact by jumbo multicast traffic stream, thereby causes this multicast service unsteadiness, does not propose effective solution at present as yet.
Summary of the invention
Main purpose of the present invention is to provide a kind of partition method and device of multicast service, to solve the above-mentioned multicast service problem of unstable that is caused to impact by jumbo multicast traffic stream because of the multicast protocol message at least.
According to an aspect of the present invention, a kind of partition method of multicast service is provided, has may further comprise the steps: network element is confirmed the first permanent virtual circuit PVC and the 2nd PVC according to current multicast service; Network element uses a PVC to receive the multicast protocol message of current multicast service; Network element uses the 2nd PVC to send the multicast traffic stream of current multicast service.
According to a further aspect in the invention, a kind of spacer assembly of multicast service is provided, has comprised: determination module is used for confirming the first permanent virtual circuit PVC and the 2nd PVC according to current multicast service; Receiver module is used to use the definite PVC of determination module to receive the multicast protocol message of current multicast service; Sending module is used to use the 2nd definite PVC of determination module to send the multicast traffic stream of current multicast service.
Through the present invention; Employing is with PVC and multicast protocol message and multicast traffic stream binding; Use two PVC receiving group protocol massages and transmission multicast traffic stream respectively; Solved the multicast service problem of unstable that is caused to impact by jumbo multicast traffic stream because of the multicast protocol message, the safety of perfect network has also reached effective professional the isolation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the partition method of the multicast service of the embodiment of the invention 1;
Fig. 2 is the flow chart according to the partition method of the multicast service of the embodiment of the invention 2;
Fig. 3 is the particular flow sheet according to the partition method of the multicast service of the embodiment of the invention 2;
Fig. 4 is the structured flowchart according to the spacer assembly of the multicast service of the embodiment of the invention 3;
Fig. 5 is the structured flowchart according to the spacer assembly of the multicast service of the embodiment of the invention 4.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Reach the method that multicast service is isolated to existing based on VLAN, can only be used in the isolation between different business, can only in same PVC passage, accomplish same multicast service, the embodiment of the invention provides a kind of partition method and device of multicast service.
Embodiment 1
Fig. 1 shows the flow chart according to the partition method of the multicast service of the embodiment of the invention, and this method may further comprise the steps (step S102 is to step S106):
Step S102, network element is confirmed a PVC and the 2nd PVC according to current multicast service;
Usually; The PVC number of supporting on the network element can reach 8, receives the impact of a large amount of multicast traffic streams for fear of the multicast protocol message, and present embodiment is selected two PVC; Promptly a PVC and the 2nd PVC are respectively applied for bear multicast protocol massages and multicast traffic stream.Based on this, this step can comprise: network element is current multicast service selection the one PVC and the 2nd PVC; Network element is provided with port of self and the port on the modulator-demodulator, makes a PVC be used to carry the multicast protocol message of current multicast service, and the 2nd PVC is used to carry the multicast traffic stream of current multicast service.The modulator-demodulator here is the network equipment that links to each other with this network element, and this modulator-demodulator is used for also being used for transmitting the multicast traffic stream that this network element is issued the user to the multicast protocol message of this network element forwarding user side.Through the port on the modulator-demodulator is provided with, the scheme of present embodiment can be compatible mutually with existing network, and do not need the special networks layout.
Be no more than in the multicast service kind under 4 kinds the situation; Can one group of PVC be set to different multicast services; This group PVC comprises a PVC and the 2nd PVC; The one PVC is used to carry the multicast protocol message of current multicast service, and the 2nd PVC is used to carry the multicast traffic stream of current multicast service, simultaneously the corresponding different VLAN of each multicast service; Multicast protocol message and multicast traffic stream are isolated, avoided the multicast protocol message to receive the impact of a large amount of multicast traffic streams.
Step S104, network element use a PVC to receive the multicast protocol message of current multicast service;
After this network element used a PVC to receive the multicast protocol message of current multicast service, this network element was confirmed the type of multicast protocol message, handled according to the type of confirming.Wherein, the type of multicast protocol message comprises: join message, leave message and query message;
For the further fail safe of enhanced system; Prevent that illegal user from adding multicast group; The network element of present embodiment is confirmed before the type of multicast protocol message; This method also comprises: whether this network element inspection multicast protocol massages is legal, if the step of the type of multicast protocol message is confirmed in execution; If, do not abandon the multicast protocol message.
Wherein, this network element inspection multicast protocol massages legal comprising whether:
1) whether the virtual LAN VLAN in this network element inspection multicast protocol massages is M-VLAN;
2) if M-VLAN confirms that the multicast protocol message is legal;
3) if not M-VLAN, whether the network element inspection self opens the travelling across VLAN function;
4) if open the travelling across VLAN function, confirm that the multicast protocol message is legal;
5), confirm that the multicast protocol message is illegal if do not open the travelling across VLAN function.
Corresponding legal multicast protocol message; Type according to the multicast protocol message is different; Can take different processing policies; For example: when the multicast protocol message when joining message, network element joins message according to this and in multicast forward table, writes the multicast forwarding list item, and this is joined message is transmitted to upstream equipment; Wherein, the multicast forwarding list item comprises: VLAN, PVC (present embodiment is the 2nd PVC), UNI (UserNetwork Interface, User Network Interface) and multicast group that the multicast traffic stream of current multicast service is corresponding;
When the multicast protocol message was leave message, this network element was removed list item corresponding in the multicast forward table according to this leave message, and this leave message is transmitted to upstream equipment;
When the multicast protocol message was query message, network element carried out query processing according to this query message.
The processing procedure of concrete multicast protocol message can realize with reference to correlation technique, no longer details here.
Step S106, network element use the 2nd PVC to send the multicast traffic stream of current multicast service;
After network element receives the multicast traffic stream of current multicast service, confirm to use the 2nd PVC to send multicast traffic stream according to multicast traffic stream and multicast forward table.
The network element of present embodiment can be the broadband access network element, for example: the ONU of the DSLAM of DSL or PON (Passive OpticalNetwork, passive optical network) (Optical Network Unit, optical network unit).
Present embodiment adopts PVC and multicast protocol message and multicast traffic stream binding; Use two PVC receiving group protocol massages and transmission multicast traffic stream respectively; Solved the multicast service problem of unstable that is caused to impact by jumbo multicast traffic stream because of the multicast protocol message, the safety of perfect network has also reached effective professional the isolation.
Embodiment 2
Present embodiment provides a kind of partition method of multicast service, and is as shown in Figure 2 in order to isolate multicast protocol message and multicast media data flow (also abbreviating multicast traffic stream as), and this method comprises that following step S202 is to step S208:
Step S202, network element be multiple pvcs and port binding, and wherein, PVC 1 is used for the bear multicast protocol massages, and PVC 2 is used for the bear multicast media data flow;
Step S204 after network element is received the multicast protocol message, judges whether from multicast protocol passage PVC 1, if handle respectively according to the type of multicast protocol message again;
For example: when the multicast protocol message is adding or leave message, does the interpolation and the deletion of multicast forwarding list item respectively and handle; Present embodiment only with the multicast protocol message for joining message or leave message describes for example, certainly, the multicast protocol message also comprises query message etc., its handle with correlation technique in processing similar, do not do too much description here.
Step S206, the multicast protocol message is safeguarded the interpolation and the deletion of hardware multicast forwarding-table item after handling, wherein the multicast forwarding list item comprises VLAN, PVC, uni port, multicast group.Wherein, the PVC in the multicast forwarding list item refers to and is used for the passage PVC 2 of bear multicast media data flow rather than the passage PVC 1 of bear multicast protocol massages; Multicast forward table mails to the upper united mouth to this multicast protocol message and forwards after safeguarding, upstream device application or interruption multicast media data flow;
Step S208 after upstream the multicast media data flow of application arrives this network element, according to situation such as qos policy and multicast forwarding list items, exchanges to the user to the multicast media data flow through exchange chip from PVC 2.
Need to prove; Can in such as equipment such as the DSLAM of DSL (Digital Subscriberline digital subscriber line), PON, carry out in the step shown in the flow chart of accompanying drawing; And; Though logical order has been shown in flow chart, in some cases, can have carried out step shown or that describe with the order that is different from here.
Implementation procedure in the face of the embodiment of the invention is described in detail down.
Fig. 3 is the detail flowchart according to the partition method of the multicast service of the embodiment of the invention, and is as shown in Figure 3, and this flow process comprises that following step S302 is to step S326:
Step S302; VCI (the Virtual Call/circuit Interface of network element configuration PVC 1 and PVC 2; Virtual call/circuit interface), VPI (Virtual Path Identifier; Virtual path identifiers) value, corresponding modem (being modulator-demodulator) goes up VCI, the vpi value of PVC respectively, and binds with VLAN; Wherein, PVC 1 is used for the bear multicast protocol massages, and PVC 2 is used for the bear multicast media data flow;
For network element; A user port can be supported multiple pvcs, if when using PVC1 and PVC2 to be used for bear multicast agreement and multicast traffic stream respectively, can dispose correspondence with the PVC of modulator-demodulator; So-called PVC is corresponding; Be exactly that PVC comprises that two values (being VCI and vpi value) configuration in network element and modulator-demodulator is identical, these two VCI+VPI can confirm a PVC, on modulator-demodulator, can dispose multiple pvcs.
This step is equivalent to the port that self is set and the port on the modulator-demodulator among the embodiment 1;
Step S304 judges that the multicast protocol message that receives whether from PVC 1, if judged result then gets into step S306 for being, otherwise goes to step S312;
Wherein, Judge that whether the multicast protocol message is from PVC 1; Can judge through the port of receiving group protocol massages; According to the configuration among the step S302, port and PVC on the network element have corresponding relation, can confirm according to the port of receiving group protocol massages which PVC this multicast protocol message is on;
Step S306 judges that whether PVC 1 binds with M-VLAN, if judged result then gets into step S310 for being, otherwise gets into step S308;
Step S308 judges whether DSL has opened travelling across VLAN, if judged result then gets into step S310 for being, otherwise gets into step S312;
The logic determines that step S310, multicast protocol message handle comprises effective port, VLAN, and the situation of multicast group; This is judged as existing mode, no longer details here, and after this judgement is passed through, execution in step S314; If judge and do not pass through execution in step S312;
Step S312 abandons illegal multicast protocol message, and current flow process finishes;
Step S314, the type of judgement multicast protocol message is if join message, if then get into step S316, if leave message then gets into step S322;
Step S316 comprises multicast forwarding list item: VLAN, port the multicast MAC (MediaAccess Control, medium access control) of PVC 2, multicast group mapping writes in the multicast forward table, and this multicast forward table is stored in the hardware such as register usually;
Step S318 after the multicast forwarding list item is handled well, forwards multicast protocol message upstream device, and multicast traffic stream is guided on the DSL;
Step S320 exchanges out DSL according to multicast forward table and control strategy with multicast traffic stream, and goes up the PVC 2 arrival users that bind through modem, and flow process finishes;
Step S322 removes multicast forwarding list item corresponding in the multicast forward table according to leave message;
Step S324 transmits multicast leave message upstream device, and interrupts corresponding multicast media data flow, and present embodiment is for interrupting the multicast media data flow on the PVC 2; Flow process finishes.
Present embodiment is bound PVC and multicast protocol message and multicast media data flow; Use two PVC receiving group protocol massages and transmission multicast traffic stream respectively; Solved the multicast service problem of unstable that is caused to impact by jumbo multicast traffic stream because of the multicast protocol message; Thereby strengthened the network design of multicast service application and the flexibility of deployment, ensured the stable of multicast service; Simultaneously, the implementation method of present embodiment can be used access device, on the network that DSLAM or PON formed, comprises IPV4 network or IPV6 network, and not needing that too big transformation is done by the existing network system can realize, can be compatible with existing network, realize simple.
Embodiment 3
Fig. 4 shows the structured flowchart according to the spacer assembly of the multicast service of the embodiment of the invention, and this device comprises:
Sending module 46 links to each other with determination module 42, is used to use determination module 42 the 2nd definite PVC to send the multicast traffic stream of current multicast service.
Wherein, determination module 42 comprises: selected cell is used to current multicast service selection the one PVC and the 2nd PVC; Port is provided with the unit, is used to port of self and the port on the modulator-demodulator are set, and makes a PVC be used to carry the multicast protocol message of current multicast service, and the 2nd PVC is used to carry the multicast traffic stream of current multicast service.
Further, this device also comprises: the type of message determination module, link to each other with receiver module 44, and the type of the multicast protocol message that is used for confirming that receiver module 44 receives, the type comprises: join message, leave message and query message; Message processing module (MPM) links to each other with the type of message determination module, is used for handling according to the type that the type of message determination module is confirmed.
In order to strengthen fail safe, this device also comprises: the inspection module is used to check whether the multicast protocol massages is legal, if trigger the type that the type of message determination module is confirmed the multicast protocol message; If, do not abandon the multicast protocol message.For example check whether the VLAN in the multicast protocol massages is M-VLAN; If M-VLAN confirms that the multicast protocol message is legal; If not M-VLAN, check whether self opens the travelling across VLAN function; If open the travelling across VLAN function, confirm that the multicast protocol message is legal; If do not open the travelling across VLAN function, confirm that the multicast protocol message is illegal.
Type according to the multicast protocol message is different, and above-mentioned message processing module (MPM) comprises:
First message process unit, be used for when the multicast protocol message when joining message, joining message according to this writes the multicast forwarding list item in multicast forward table, and will join message and be transmitted to upstream equipment; Wherein, the multicast forwarding list item comprises: VLAN, PVC, User Network Interface UNI and multicast group that the multicast traffic stream of current multicast service is corresponding;
Second message process unit is used for when the multicast protocol message is leave message, removes list item corresponding in the multicast forward table according to this leave message, and leave message is transmitted to upstream equipment;
The 3rd message process unit is used for when the multicast protocol message is query message, carrying out query processing according to this query message.
Preferably, sending module 46 comprises: the multicast traffic stream transmitting element, and after being used to receive the multicast traffic stream of current multicast service, confirm to use the 2nd PVC to send multicast traffic stream according to multicast traffic stream and multicast forward table.Present embodiment it is also conceivable that the qos requirement of current multicast service etc. when carrying out the multicast traffic stream transmission.
The device of present embodiment is arranged among the ONU of DSLAM and/or PON of DSL.
Present embodiment adopts PVC and multicast protocol message and multicast traffic stream binding; Use two PVC receiving group protocol massages and transmission multicast traffic stream respectively; Solved the multicast service problem of unstable that is caused to impact by jumbo multicast traffic stream because of the multicast protocol message, the safety of perfect network has also reached effective professional the isolation.
Embodiment 4
Present embodiment IPTV business is that example describes as multicast service; Present embodiment is isolated with multicast traffic stream the multicast protocol message through different PVC, do not disturbed by video flowing to reach agreement, particularly; The device that provides a kind of multicast service to isolate; Referring to Fig. 5, the device that this multicast service is isolated comprises: PVC binding module 52, multicast protocol processing module 54, multicast forwarding table handing module 56, multicast packet flow control policy module 58, describe in the face of said structure down.
Multicast protocol processing module 54; Be used to check whether PVC 1 sends is the multicast protocol message; And judge the binding item that whether exists in legitimacy and the database of multicast protocol message with PVC 1, if, then (for example according to the type of multicast protocol message; Add or leave message), separately handle; This module can be equivalent to the type of message determination module and inspection module among the embodiment 3;
Multicast forwarding table handing module 56 is used for adding or deletion multicast forwarding list item, when the processing multicast joins message, then adds the multicast forwarding list item in hardware, if leave message, then removing group forwarding-table item; This module can be equivalent to the message processing module (MPM) among the embodiment 3;
Multicast packet flow control policy module 58 is used for the requirement according to the data configuration and the QoS of PVC binding module 52, during application of policies is transmitted and controlled to multicast data traffic, uses PVC2 to accomplish the forwarding of multicast traffic stream.This module can be equivalent to the sending module 46 among the embodiment 3.
Further, said apparatus also comprises: if VLAN and M-VLAN that the uni port adds are not same VLAN, then will use the travelling across VLAN function, the multicast protocol message can be cross in the M-VLAN and handle; If many mouthfuls modem, then the different VLAN of configuration binds different service on modem, different PVC binds the passage of multicast protocol and multicast media data respectively.
Based on said apparatus, the method that present embodiment also provides a kind of multicast service to isolate, this method comprises:
1) PVC binds processing module and receives the multicast protocol message that is sent by modem, and issues the multicast protocol processing module to message and handle;
2) the multicast protocol processing module reads the multicast protocol message, and whether the VLAN in the inspection message is M-VLAN, if not, then see and whether opened the travelling across VLAN function, if do not open the travelling across VLAN function, then with packet loss.If correct multicast protocol message, then, separately handle according to the type of message (add or leave), wherein also to check whether be that the message that the multicast protocol passage (being PVC 1) in the PVC binding module sends over is done handled;
3) the multicast forwarding table handing module is according to correct multicast protocol; Write hardware to the multicast forwarding list item; Wherein the multicast forwarding list item comprises: VLAN, PVC, uni port, multicast group; Attention: the PVC here fills in is to be used for away the passage PVC 2 of multicast Media Stream, rather than multicast protocol passage PVC 1.If leave message, then removing group forwarding-table item interrupts Media Stream (also claiming the multicast media data flow);
4) multicast packet flow control policy module is transmitted application of policies and control to multicast traffic stream according to configuration of binding processing module and the requirement of QoS, reaches the purpose of traffic classification;
Wherein, If many mouthfuls modem; Then the different VLAN of configuration binds different service on modem; Different PVC binds the passage of multicast protocol massages and multicast media data flow respectively, judges it is not the multicast protocol message that comes from multicast protocol passage PVC1 in this way, then ignores this multicast protocol message;
Further, above-mentioned multicast service can also reach the isolation between the multicast user after opening the travelling across VLAN function, brings security performance more for whole networking business, does not open the travelling across VLAN multicast functionality in this way, then ignores this multicast protocol bag.
Pass through present embodiment; Adopt different PVC to bind the different content of multicast service; And formulate the multicast protocol message with this and walk different PVC passages with the multicast media data; Solved the multicast protocol message and given the problem of impacting, reached the isolation of multicast protocol and multicast traffic stream, and then ensured the stable of network service by jumbo multicast media data.
In sum; Pass through the above embodiment of the present invention; A kind of function is independent, universality the is high multicast protocol apparatus and method with the isolation of multicast media data are provided; Be used to solve the multicast protocol message and given the problem of impacting, thereby strengthened the network design of IPTV application and the flexibility of deployment, ensured the stable of multicast service by jumbo multicast packet.Implementation method of the present invention can be used on the network that access device such as DSLAM or PON form, and comprises IPV4 network or IPV6 network, does not need too big transformation is done by the existing network system, only needs on modem, to increase PVC and binds and get final product.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the partition method of a multicast service is characterized in that, comprising:
Network element is confirmed the first permanent virtual circuit PVC and the 2nd PVC according to current multicast service;
Said network element uses a said PVC to receive the multicast protocol message of said current multicast service;
Said network element uses said the 2nd PVC to send the multicast traffic stream of said current multicast service.
2. method according to claim 1 is characterized in that, said network element confirms that according to current multicast service a PVC and the 2nd PVC comprise:
Said network element is current multicast service selection the one PVC and the 2nd PVC;
Said network element is provided with port of self and the port on the modulator-demodulator, makes a said PVC be used to carry the multicast protocol message of said current multicast service, and said the 2nd PVC is used to carry the multicast traffic stream of said current multicast service.
3. method according to claim 1 is characterized in that, said network element uses a said PVC to receive after the multicast protocol message of said current multicast service, and said method also comprises:
Said network element is confirmed the type of said multicast protocol message, and said type comprises: join message, leave message and query message;
Said network element is handled according to the said type of confirming.
4. method according to claim 3 is characterized in that, said network element confirms that before the type of said multicast protocol message, said method also comprises:
Said network element checks whether said multicast protocol message is legal, if carry out the said step of confirming the type of said multicast protocol message; If, do not abandon said multicast protocol message.
5. method according to claim 4 is characterized in that, said network element is checked said multicast protocol message legal comprising whether:
Said network element checks whether the virtual LAN VLAN in the said multicast protocol message is M-VLAN;
If M-VLAN confirms that said multicast protocol message is legal;
If not M-VLAN, whether said network element inspection self opens the travelling across VLAN function;
If open the travelling across VLAN function, confirm that said multicast protocol message is legal;
If do not open the travelling across VLAN function, confirm that said multicast protocol message is illegal.
6. method according to claim 3 is characterized in that, said network element is handled according to the said type of confirming and comprised:
When said multicast protocol message when joining message, said network element writes the multicast forwarding list item according to said joining message in multicast forward table, and said joining message is transmitted to upstream equipment; Wherein, said multicast forwarding list item comprises: VLAN, PVC, User Network Interface UNI and multicast group that the multicast traffic stream of said current multicast service is corresponding;
When said multicast protocol message was leave message, said network element was removed list item corresponding in the said multicast forward table according to said leave message, and said leave message is transmitted to said upstream equipment;
When said multicast protocol message was query message, said network element carried out query processing according to said query message.
7. method according to claim 6 is characterized in that, the multicast traffic stream that said network element uses said the 2nd PVC to send said current multicast service comprises:
After said network element receives the multicast traffic stream of said current multicast service, confirm to use said the 2nd PVC to send said multicast traffic stream according to said multicast traffic stream and said multicast forward table.
8. the spacer assembly of a multicast service is characterized in that, comprising:
Determination module is used for confirming the first permanent virtual circuit PVC and the 2nd PVC according to current multicast service;
Receiver module is used to use the definite said PVC of said determination module to receive the multicast protocol message of said current multicast service;
Sending module is used to use definite said the 2nd PVC of said determination module to send the multicast traffic stream of said current multicast service.
9. device according to claim 8 is characterized in that, said determination module comprises:
Selected cell is used to current multicast service selection the one PVC and the 2nd PVC;
Port is provided with the unit, is used to port of self and the port on the modulator-demodulator are set, and makes a said PVC be used to carry the multicast protocol message of said current multicast service, and said the 2nd PVC is used to carry the multicast traffic stream of said current multicast service.
10. device according to claim 8 is characterized in that, said device also comprises:
The type of message determination module is used for confirming the type of said multicast protocol message, and said type comprises: join message, leave message and query message;
Message processing module (MPM) is used for handling according to the said type that said type of message determination module is confirmed.
11. device according to claim 10 is characterized in that, said device also comprises:
The inspection module is used to check whether said multicast protocol message is legal, if trigger the type that said type of message determination module is confirmed said multicast protocol message; If, do not abandon said multicast protocol message.
12. device according to claim 10 is characterized in that, said message processing module (MPM) comprises:
First message process unit, be used for when said multicast protocol message when joining message, in multicast forward table, write the multicast forwarding list item according to said joining message, and said joining message be transmitted to upstream equipment; Wherein, said multicast forwarding list item comprises: VLAN, PVC, User Network Interface UNI and multicast group that the multicast traffic stream of said current multicast service is corresponding;
Second message process unit is used for when said multicast protocol message is leave message, removes list item corresponding in the said multicast forward table according to said leave message, and said leave message is transmitted to said upstream equipment;
The 3rd message process unit is used for when said multicast protocol message is query message, carrying out query processing according to said query message.
13. device according to claim 12 is characterized in that, said sending module comprises:
The multicast traffic stream transmitting element after being used to receive the multicast traffic stream of said current multicast service, confirms to use said the 2nd PVC to send said multicast traffic stream according to said multicast traffic stream and said multicast forward table.
14. each described device is characterized in that according to Claim 8-13, said device is arranged in the optical network unit ONU of digital subscriber line access multiplex DSLAM and/or passive optical-fiber network PON of digital subscriber line DSL.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100235817A CN102611606A (en) | 2011-01-21 | 2011-01-21 | Method and device for separating multicast service |
| PCT/CN2011/083083 WO2012097646A1 (en) | 2011-01-21 | 2011-11-28 | Isolation method and device for multicast service |
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| CN2011100235817A CN102611606A (en) | 2011-01-21 | 2011-01-21 | Method and device for separating multicast service |
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