CN100463449C - A method for quick access to the multicast used to broadband access equipment - Google Patents
A method for quick access to the multicast used to broadband access equipment Download PDFInfo
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- CN100463449C CN100463449C CNB200510100427XA CN200510100427A CN100463449C CN 100463449 C CN100463449 C CN 100463449C CN B200510100427X A CNB200510100427X A CN B200510100427XA CN 200510100427 A CN200510100427 A CN 200510100427A CN 100463449 C CN100463449 C CN 100463449C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2801—Broadband local area networks
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Abstract
The invention relates to a method for accessing multicast in wide band access device. Wherein, it comprises that the user plate detects the internet group manage protocol report; the user plate analyzes the report; the analyzed result is the multicast group requested by report that allows the user access, adding the user into the multicast group of user plate, and transmitting the report to the main control plate; the service layer of main control plate confirms the access with multicast priority. The invention directly analyzes IGMP REPORT at user plate, to balance load and reduce access time.
Description
Technical field
The present invention relates to the Ethernet method of multicasting in a kind of computer network communication field, especially relate to the multicast protocol message processing method on user's plate in a kind of broadband access equipment.
Background technology
In present most of big-and-middle-sized access device, its basic multicast cut-in method is to utilize the user's plate in the equipment to intercept IGMP REPORT (Internet set managerial protocol report) message, is transparent to master control borad and safeguards multicast table.Its groundwork mode is: user's plate is surveyed the protocol type in IP packet header in the Ethernet bag, extracts IGMP REPORT message, is transparent to master control borad; The REPORT protocol massages that master control borad utilizes user's plate to be dealt into carries out a series of judgement inspections: (1) at first checks the legitimacy of REPORT protocol massages, if legal then carry out access and judge; (2) whether allow to add multicast group, if permission adds then carries out next step; (3) whether this multicast group exists, and if there is no then creates multicast group; (4) then port is added the forwarding list of this multicast group; (5) and then with the command down-transmitting of multicast group to user's plate, user's buttress is according to the multicast table multicast data forwarding, like this, this port just can receive broadband access equipment Digital Subscriber Line Access Multiplexer DSLAM (DSL AccessMultiplexer, hereinafter to be referred as: DSLAM) the mac address of Zhuan Faing is the multicast packet of this group.
This processing method has the characteristics of centralized management in realization, but has also brought following shortcoming:
1) time delay of group membership's adding is too big.Join delay and be meant that the adding message of receiving the designated multicast group from access device to be measured begins time delay to this designated multicast group forwarding multicasting stream to it.Can see, traditional processing method receives that from user's plate the REPORT message is to really obtaining the multiple processing of having passed through of multicast packet, and also has the message transmission between twice master control borad and the user's plate, the reaction that shows the central multicast service program request of actual use is slow, promptly the time delay of Jia Ruing is too big, is difficult to satisfy the index that joins delay that current most of operator proposes.
2) load is unbalanced.All protocol massages are resolved and the state exchange of user port all carries out on master control borad, give the master control borad operating pressure very big, are simple transparent transmission protocol massages on user's plate simultaneously, have caused the waste of resource.
Therefore, there is defective in prior art, awaits improving and development.
Summary of the invention
The object of the present invention is to provide a kind of multicast that is used for broadband access equipment to add method fast, join delay too greatly and the unbalanced problem of load at multicast service in the broadband access equipment of prior art, the inventive method is directly resolved IGMP REPORT message on user's plate, join delay thereby reduce, realize load balancing.
Technical scheme of the present invention comprises:
A kind of multicast that is used for broadband access equipment adds method fast, and it comprises the steps:
A, intercept Internet set managerial protocol report message, and on user's plate, resolve this message at user's plate;
If it is to allow the user to add fast that the B analysis result shows the multicast group of this message application, then directly this user is added in the multicast group of safeguarding on the access customer plate, and send this Internet set managerial protocol report message to master control borad; The operation layer of described master control borad side guarantees so long as the user who has authority to add multicast group must add fast.
Described method wherein, comprises multicast address and VLAN ID sign indicating number information in the set managerial protocol report message of described Internet.
Described method, wherein,
Comprise the steps A1 to C1 before the described steps A,
A1, at the initial phase of system start-up, the multicast control table that described user's plate has generated is used to store the information of being made up of the port list of the sign of multicast virtual local area network, the group IP that represents multicast group and record port authority;
After the configuration data initialization of B1, described master control borad, download the multicast control table that is generated according to configuration by multicast service module to described user's plate, its each list item writes down the adding authority of a certain multicast group of a certain port in a certain multicast virtual local area network;
C1, described user's plate generate hash index according to multicast virtual local area network identification code in the multicast control table that issues and group IP after the message of receiving the multicast control table, deposit according to index; After finishing, described user's plate startup is in the state of intercepting Internet set managerial protocol report message;
Described step B also comprises the steps D1,
D1, described user's plate are after receiving the Internet set managerial protocol report, sign and group IP according to wherein multicast virtual local area network, generate hash index, in the multicast control table clauses and subclauses of this index correspondence, obtain indicating the port list of authority, according to port numbers up in the set managerial protocol report of Internet, check this authority credentials that described port list is central, in order to the multicast group that judges whether to join request.
Described method wherein, also comprises: if the multicast group that port is allowed to join request then judge whether this multicast group exists is if there is no then created this multicast group, port is added the forwarding list of this multicast group; If this multicast group exists, then only revise the port list of this multicast group.
Described method, wherein, described step C1 also comprises: the operation of described master control borad port that side changes adding multicast group authority all triggers new multicast control table and issues, and described user's plate then covers original corresponding list item when receiving new multicast control table.
Described method wherein, in described steps A 1, if there is Internet set managerial protocol report message up, then all is dropped.
A kind of multicast that is used for broadband access equipment provided by the present invention adds method fast, by on user's plate, directly resolving IGMP REPORT message, under the situation that realizes load balancing, reduce the time that adds multicast group greatly, can satisfy the index that joins delay that current most of operator proposes fully.
Description of drawings
Fig. 1 is the realization flow figure of the inventive method;
Fig. 2 is the process schematic diagram that the multicast control table on user's plate is created and safeguarded in the inventive method;
Fig. 3 is the structural representation of the multicast control table of the inventive method.
Embodiment
Below in conjunction with accompanying drawing, will carry out comparatively detailed explanation to each preferred embodiment of the present invention.
The multicast that is used for broadband access equipment of the present invention adds method fast, its core concept is to intercept IGMP REPORT message on user's plate, and on user's plate, resolve this message, if it is to allow to add fast that analysis result shows the multicast group that is this message application, then directly this user is added in the multicast group of safeguarding on the access customer plate, and continue to send the REPORT protocol massages to master control borad, otherwise, other processing done.Here, the operation layer of described master control borad side has guaranteed so long as the user who has authority to add multicast group must add fast.
The realization flow figure of the inventive method need to prove as shown in Figure 1:
The information of the IGMP REPORT bag that 1) is obtained has wherein comprised many aspects, such as multicast address and VLAN ID (VLAN ID sign indicating number);
2) described multicast control table is two different notions with multicast table.The former effect is the access control of carrying out multicast table, and its establishment and maintenance all issue by described master control borad, see shown in Figure 2 in the handling process of user's plate side; The latter is that multicast service is transmitted, and has safeguarded the user port tabulation that belongs to this multicast group on user's plate;
3) the IGMP REPORT bag that transmits to described master control borad does not carry out any modification, needs therefore to guarantee that the treatment step that user's plate side and master control borad side are carried out is consistent.
In order to realize searching the multicast control table fast, it is the table and the corresponding lookup method of keyword with VLAN ID and GROUP IP (group IP) that the inventive method has designed a kind of.The structure of described multicast control table as shown in Figure 3, when writing table, taken into account the efficient of tabling look-up, when writing table with MVID (M-VLAN ID, be the multicast virtual local area network identification code) and GROUP IP (group IP) as keyword, utilize hash algorithm, generate multicast control table index, with MVID, GROUP IP and port permissions list write multicast control table clauses and subclauses respectively.Generate multicast control table index with MVID and GROUP IP as keyword equally when searching, and do not need to travel through whole multicast control table, so just saved the time of tabling look-up.Produce identical index in order to solve hash algorithm simultaneously, under each index, created 4 clauses and subclauses and solved this problem.
The detailed step of the inventive method is described below:
1. the initial phase of system start-up, phase I as shown in Figure 2, user's plate should generate the multicast control table of a sky, data format is a two-dimensional array as shown in Figure 3, supports 512 index, each index comprises 4 clauses and subclauses, each clauses and subclauses is made up of three elements, is respectively the MVID that represents MVLAN (M-VLAN), represents the GROUP IP of multicast group and the PORTLIST (port list) of record port authority.If have the REPORT message up this moment,, will all be dropped because the multicast control table is empty;
2. after the configuration data initialization of master control borad, must download the multicast control table that generates by the multicast configuration to described user's plate, this list structure as shown in Figure 3, each list item has wherein illustrated the adding authority of a certain multicast group of a certain port in a certain MVLAN.Described user's plate is not that this table is write empty multicast control table in proper order after receiving multicast control table issuing message, but as shown in Figure 2, generate hash index according to MVID in the multicast control table that issues and GROUP IP, deposit according to index.Simultaneously, the operation of described master control borad port that side changes adding multicast group authority all can trigger new control table and issue, such as increasing deletion multicast group, change of preview authority and time or the like, in a single day user's plate receives new multicast control table, then covers original list item;
3. can be in the state of intercepting the IGMP message after described user's plate startup is finished,, at first obtain the relevant information in the message, comprise GROUP IP and MVID in case extract IGMP REPORT message.
4. next as shown in Figure 1, judge whether the multicast group that can join request according to the information of obtaining.The same with the control table of establishment multicast, utilize hash algorithm can obtain index very soon according to MVID in the REPORT message and GROUP IP.Owing under every index 4 clauses and subclauses are arranged,, just can find correct multicast control table clauses and subclauses so need mate MVID and GROUP IP again.
5. like this, in multicast control table clauses and subclauses, can obtain indicating the PORT LIST of authority.Wrap capable port numbers according to REPORT, check this value in the middle of the PORT LIST.1 expression can add, otherwise carries out other processing.If permission adds then judges whether this multicast group exists, if there is no then create multicast group, then port is added the forwarding list of this multicast group; If multicast group exists, the port list that then only needs to revise multicast group gets final product.
6. last, IGMP REPORT message is sent to described master control borad by control channel, be used to finish the state-maintenance of master control borad side, keep the levels data consistency.
The inventive method requires described user's plate can intercept the message according to protocol fields IGMP REPORT, can be suitable for most of big-and-middle-sized broadband access equipment, by the above-mentioned method that on user's plate, realizes adding fast multicast group, reduced the delay that the user adds multicast group greatly.
Need to prove that therefore the number of the group that the multicast access control table of the inventive method comprises and the data representation method among the PORT LIST only for an example of explanation the inventive method, can not be used for limiting scope of patent protection of the present invention.
Should be pointed out that the inventive method for those of ordinary skills, can change or replace according to technical scheme of the present invention and beneficial effect thereof, and all these changes or replace the protection range that all should belong to claim of the present invention.
Claims (6)
1, a kind of multicast that is used for broadband access equipment adds method fast, and it comprises the steps:
A, intercept Internet set managerial protocol report message, and on user's plate, resolve this message at user's plate;
If it is to allow the user to add fast that the B analysis result shows the multicast group of this message application, then directly this user is added in the multicast group of safeguarding on the access customer plate, and send this Internet set managerial protocol report message to master control borad; The operation layer of described master control borad side guarantees so long as the user who has authority to add multicast group must add fast.
2, method according to claim 1 is characterized in that, comprises multicast address and VLAN ID sign indicating number information in the set managerial protocol report message of described Internet.
3, method according to claim 1 is characterized in that,
Comprise the steps A1 to C1 before the described steps A,
A1, at the initial phase of system start-up, the multicast control table that described user's plate has generated is used to store the information of being made up of the port list of the sign of multicast virtual local area network, the group IP that represents multicast group and record port authority;
After the configuration data initialization of B1, described master control borad, download the multicast control table that is generated according to configuration by multicast service module to described user's plate, its each list item writes down the adding authority of a certain multicast group of a certain port in a certain multicast virtual local area network;
C1, described user's plate generate hash index according to multicast virtual local area network identification code in the multicast control table that issues and group IP after the message of receiving the multicast control table, deposit according to index; After finishing, described user's plate startup is in the state of intercepting Internet set managerial protocol report message;
Described step B also comprises the steps D1,
D1, described user's plate are after receiving the Internet set managerial protocol report, sign and group IP according to wherein multicast virtual local area network, generate hash index, in the multicast control table clauses and subclauses of this index correspondence, obtain indicating the port list of authority, according to port numbers up in the set managerial protocol report of Internet, check this authority credentials that described port list is central, in order to the multicast group that judges whether to join request.
4, method according to claim 3 is characterized in that, also comprises: if allow the multicast group that joins request then judge whether this multicast group exists, if there is no then create this multicast group, port is added the forwarding list of this multicast group; If this multicast group exists, then only revise the port list of this multicast group.
5, method according to claim 3, it is characterized in that, described step C1 also comprises: the operation of described master control borad port that side changes adding multicast group authority all triggers new multicast control table and issues, described user's plate then covers original corresponding list item when receiving new multicast control table.
6, method according to claim 3 is characterized in that, in described steps A 1, if there is Internet set managerial protocol report message up, then all is dropped.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510100427XA CN100463449C (en) | 2005-10-21 | 2005-10-21 | A method for quick access to the multicast used to broadband access equipment |
| PCT/CN2006/002025 WO2007045142A1 (en) | 2005-10-21 | 2006-08-10 | Multicast fast adding method for the broadband access device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510100427XA CN100463449C (en) | 2005-10-21 | 2005-10-21 | A method for quick access to the multicast used to broadband access equipment |
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| CN1953414A CN1953414A (en) | 2007-04-25 |
| CN100463449C true CN100463449C (en) | 2009-02-18 |
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| CNB200510100427XA Expired - Fee Related CN100463449C (en) | 2005-10-21 | 2005-10-21 | A method for quick access to the multicast used to broadband access equipment |
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| CN (1) | CN100463449C (en) |
| WO (1) | WO2007045142A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453527B (en) * | 2007-11-30 | 2011-11-30 | 华为技术有限公司 | Method, network system and network appliance for dynamic policy conversion |
| CN101364889B (en) * | 2008-09-24 | 2011-01-19 | 中兴通讯股份有限公司 | Method for multicast user quick access |
| WO2011127857A2 (en) * | 2011-05-17 | 2011-10-20 | 华为技术有限公司 | Processing method for multicast data streams, user facing provider edge (upe) and network facing provider edge (npe) |
| CN102916892A (en) * | 2012-11-05 | 2013-02-06 | 杭州迪普科技有限公司 | Processing method and device for multicast message |
| CN105704065A (en) * | 2016-01-08 | 2016-06-22 | 烽火通信科技股份有限公司 | Multicast rapid joining method of passive optical network (PON) system |
| CN117411738B (en) * | 2023-12-15 | 2024-03-08 | 格创通信(浙江)有限公司 | Multicast replication method, device, electronic equipment and storage medium |
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| CN1402481A (en) * | 2002-09-26 | 2003-03-12 | 北京港湾网络有限公司 | Method for wide band switch-on apparatus supporting of Ethernet load point-to-point protocol |
| CN1414759A (en) * | 2002-01-30 | 2003-04-30 | 华为技术有限公司 | Controlled group broadcasting system and its realizing method |
| CN1547363A (en) * | 2003-12-12 | 2004-11-17 | 港湾网络有限公司 | Control method of multicast board-spanning forwarding |
| CN1581817A (en) * | 2003-08-07 | 2005-02-16 | 华为技术有限公司 | Space multi-playing digital user line access multiplexer group-playing business realizing method and apparatus |
| CN1665219A (en) * | 2004-03-06 | 2005-09-07 | 鸿富锦精密工业（深圳）有限公司 | System and method for multicast traffic control management |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2398207A (en) * | 2003-02-06 | 2004-08-11 | King S College London | Multicast group management in packet radio networks |
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- 2006-08-10 WO PCT/CN2006/002025 patent/WO2007045142A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1414759A (en) * | 2002-01-30 | 2003-04-30 | 华为技术有限公司 | Controlled group broadcasting system and its realizing method |
| CN1402481A (en) * | 2002-09-26 | 2003-03-12 | 北京港湾网络有限公司 | Method for wide band switch-on apparatus supporting of Ethernet load point-to-point protocol |
| CN1581817A (en) * | 2003-08-07 | 2005-02-16 | 华为技术有限公司 | Space multi-playing digital user line access multiplexer group-playing business realizing method and apparatus |
| CN1547363A (en) * | 2003-12-12 | 2004-11-17 | 港湾网络有限公司 | Control method of multicast board-spanning forwarding |
| CN1665219A (en) * | 2004-03-06 | 2005-09-07 | 鸿富锦精密工业（深圳）有限公司 | System and method for multicast traffic control management |
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| Publication number | Publication date |
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| CN1953414A (en) | 2007-04-25 |
| WO2007045142A1 (en) | 2007-04-26 |
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