CN101345678B - Multicast communication method, system and multicast communication equipment - Google Patents
Multicast communication method, system and multicast communication equipment Download PDFInfo
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- CN101345678B CN101345678B CN2008101980529A CN200810198052A CN101345678B CN 101345678 B CN101345678 B CN 101345678B CN 2008101980529 A CN2008101980529 A CN 2008101980529A CN 200810198052 A CN200810198052 A CN 200810198052A CN 101345678 B CN101345678 B CN 101345678B
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Abstract
An embodiment of the invention discloses a multicast communication method, wherein a user belongs to at least two multicast communication devices in a user virtual local area network VLAN, comprising: voting in the multicast communication devices belonging to the user, and selecting one multicast communication device; transmitting message transmitted by VLAN through the selected multicast communication devices. Accordingly, the embodiment of the invention discloses a multicast communication system and a multicast communication device, through the multicast communication method, the system and the multicast communication devices, the problem of receiving repeated multicast data when the user is in double adscription or multi-adscription is solved, thereby increasing reliability of communication.
Description
Technical field
The present invention relates to the cast communication technology, relate in particular to a kind of method for multicast communication, system and cast communication equipment.
Background technology
Along with development of Communication Technique, three kinds of communication modes are arranged in the current network: clean culture, broadcasting, multicast, wherein, the multicast time of occurrence but possesses the advantage of clean culture and broadcasting the latest simultaneously, has development prospect most.
In present cast communication, network layer adopts internet multicast management agreement (Internet GroupManagement Protocol, IGMP), the IGMP agreement is the signaling mechanism of the main frame that uses on the network endways of IP multicast to router, is divided into two funtion parts: host computer side and router side.Link layer adopts the IGMPSnooping agreement, and by intercepting the outbound port information that the multicast protocol message that sends between upper strata router and the main frame is safeguarded multicast message, thereby the forwarding of management and control multicast data message realizes Layer 2 Multicast.
In the networking of cast communication, can be divided into multicast virtual local area network (Virtual Local AreaNetwork, VLAN) and user vlan, wherein, the VLAN under the interface that M-VLAN is a router with multicast source links to each other is used to realize converging of multicast data flow; User vlan is the VLAN under the multicast member main frame, is used for the data flow of receiving group VLAN.As shown in Figure 1, VLAN1 is a M-VLAN among Fig. 1, and VLAN100, VLAN200 are respectively user vlan.
The inventor finds in realizing process of the present invention, in cast communication, when a plurality of router of user attaching in same user vlan, the user can receive two parts of identical multicast packets simultaneously, to cause the user side communication blocking, network failures such as user terminal deadlock, thus cause multicast service unavailable, the shortcoming of communication reliability difference.
Summary of the invention
The embodiment of the invention proposed a kind of method for multicast communication, system and cast communication equipment, receives the problem of repeating groups multicast data when having solved the dual-homed or multi-home networking of user, improved the reliability of communication.
For solving the problems of the technologies described above, the embodiment of the invention has proposed a kind of method of cast communication, wherein, at least two the cast communication equipment of user attaching in user's virtual LAN VLAN, described method comprises:
In described at least two cast communication equipment of user attaching, conduct an election, and elect a cast communication equipment;
The message that the cast communication device forwards M-VLAN that utilization elects sends.
Correspondingly, the embodiment of the invention also provides a kind of cast communication equipment, comprising:
The election module is used for conducting an election with other cast communication equipment that belongs to same user vlan;
Forwarding module is used for when this cast communication equipment is elected the message that forwarding multicasting VLAN sends.
Correspondingly, the embodiment of the invention also provides a kind of multicast communication system, comprise at least two cast communication equipment in the user vlan of user attaching, wherein, send query message between the described cast communication equipment mutually and conduct an election the message that elected cast communication device forwards M-VLAN is sent.
By implementing a kind of method for multicast communication that the embodiment of the invention proposes, system and cast communication equipment, the user in the dual-homed or multi-home networking, by conducting an election between a plurality of cast communication equipment in same user vlan, elect one of them cast communication equipment, utilize the described cast communication device forwards data that elect, solve all cast communication device forwards data of prior art user attaching and caused user terminal to receive the technical problem of repeating data, further solve user terminal and received repeating data and cause communication blocking and deadlock etc. to cause professional disabled technical problem, improved the reliability and the service quality of cast communication.
Description of drawings
Fig. 1 is existing a kind of cast communication networking schematic diagram;
Fig. 2 is the flow chart of a kind of method for multicast communication of providing of the embodiment of the invention;
Fig. 3 is the particular flow sheet of Fig. 2 described 100;
Fig. 4 is the process chart of cast communication equipment elected among Fig. 2 described 200;
Fig. 5 is the process chart of cast communication equipment not elected among Fig. 2 described 200;
Fig. 6 is the structured flowchart of a kind of multicast communication system of the embodiment of the invention;
Fig. 7 is the structural representation of a kind of cast communication equipment of the embodiment of the invention;
Fig. 8 is the structural representation of the described election module of Fig. 7;
Fig. 9 is the structural representation of the described forwarding module of Fig. 7.
Embodiment
A kind of method for multicast communication of the embodiment of the invention, system and cast communication equipment, by electing a cast communication device forwards message in a plurality of cast communication equipment in the user vlan of user attaching, solved in existing user's dual-homing networking, the user repeats to receive data, causes professional disabled technical problem.
Elaborate the technical scheme of method for multicast communication, system and the cast communication equipment of the embodiment of the invention below in conjunction with accompanying drawing.
With reference to figure 2, be the flow chart of a kind of method for multicast communication of providing of the embodiment of the invention.In embodiments of the present invention, at least two the cast communication equipment of user attaching in same user vlan, described method comprises:
100, in described user vlan, conduct an election between each cast communication equipment of user attaching, and elect a cast communication equipment.
Particularly, each cast communication equipment of user attaching obtaining address information each other, and determines that according to described address information a cast communication equipment is elected by mutual transmission query message.
200, the message that utilizes the described cast communication device forwards M-VLAN that elects to send.
By implementing a kind of method for multicast communication that the embodiment of the invention proposes, transmit data by in a plurality of cast communication equipment of user attaching, electing a cast communication equipment, solve the problem that the user receives a plurality of repeating datas, improved system reliability.
In embodiments of the present invention, as shown in Figure 3, in 100, one of them cast communication equipment conducts an election to handle and specifically comprises:
101, this cast communication equipment sends query message to other cast communication equipment, and waits for the query message that receives other cast communication equipment transmission, the address information of carrying the cast communication equipment that sends this query message in the described query message.
102, judge in default time range, whether to receive the query message that other cast communication equipment sends, specifically can carry out timing, repeat no more here by timer.When being judged as when being, forward 103 to, otherwise forward 105 to.
103, the address information of each cast communication equipment of extraction from the query message that receives.
104, determine that according to described address information a cast communication equipment is elected, specifically comprise: the cast communication equipment of choosing address minimum in the described address information is elected, or it is elected to choose the cast communication equipment of address maximum in the described address information;
Elected cast communication equipment sends query message to other cast communication equipment, when this cast communication equipment compares by the address information with other cast communication equipment, when elected, stops to send query message.
105, when judging the query message that in default time range, does not receive other cast communication equipment transmission in 102, determine that this cast communication equipment is elected.
Need to prove that the above-mentioned embodiment that describes in conjunction with Fig. 3 is with the example that is treated to of one of them cast communication equipment of user attaching, the processing of other cast communication equipment of user attaching is similar with Fig. 3 description, repeats no more here.
In embodiments of the present invention, as shown in Figure 4, in described 200, the message of elected cast communication device forwards M-VLAN comprises:
211, elected cast communication equipment sends not elected cast communication equipment and the multicast member of query message to described user attaching;
212, receive response (Report) message that described multicast member returns, carried each multicast member information in the described response message;
213, obtain group membership's relation according to the multicast member information in the response message that receives;
214, concern the generation multicast forward table according to the described group membership who obtains, and issue multicast forward table to forwarding engine;
215, described forwarding engine is according to described multicast forward table, and the message that M-VLAN is sent forwards.
As shown in Figure 5, in described step 200, the cast communication equipment that one of them of user attaching is elected do not send query message, do not generate multicast forward table, receive the query message that elected cast communication equipment sends and comprise:
221, wait for that receiving elected cast communication equipment sends query message, and start a timer;
222, whether described not elected cast communication equipment receives described query message, when not receiving described query message, forwards 223 to;
223, judge whether timer is overtime, if then enter step 224, otherwise return step 221.
224, this user vlan triggers and re-elects, and determines that a cast communication equipment is elected, with the message of forwarding multicasting VLAN.
Need to prove, it should be appreciated by those skilled in the art that the technical scheme of the embodiment of the invention is in user vlan, based on IGMP Snooping agreement.
By implementing a kind of method for multicast communication that the embodiment of the invention proposes, the user in the dual-homed or multi-home networking, in a plurality of cast communication equipment of user attaching, elect a cast communication equipment and transmit data, solve all cast communication device forwards data of prior art user attaching and cause user terminal to receive the technical problem of repeating data, improved the reliability and the service quality of cast communication.
Based on above-mentioned a kind of method for multicast communication, the embodiment of the invention need be carried out inventive improvements to existing multicast communication system and equipment, and therefore, the embodiment of the invention has correspondingly proposed a kind of method for multicast communication, system and cast communication equipment.
With reference to figure 6, the structured flowchart of a kind of multicast communication system of the embodiment of the invention.The multicast communication system of the embodiment of the invention comprises: at least two cast communication equipment in the same user vlan 2 of user attaching are example with cast communication device A, cast communication equipment B in this example.
In this example, belong to the election of router (Router) C of M-VLAN 1 and requestor that Router D carries out IGMP, suppose that Router C is elected, the multicast packet of multicast source sends in the user vlan 2 by Router C, user vlan 2 comprises cast communication device A and cast communication equipment B, sending query message between described cast communication device A and the cast communication equipment B mutually conducts an election, suppose address information (the maximum or minimum equipment in address is elected to) by comparing multicast communication equipment A and cast communication equipment B, the cast communication equipment B is elected, elected cast communication equipment B concerns to obtain the group membership to the multicast member in the user vlan by sending query messages, concern the generation multicast forward table according to described group membership, the multicast packet of M-VLAN 1 being sent according to described multicast forward table (message) sends to switch, send the user by described switch, promptly forward-path is: multicast source → Router C → cast communication device A → cast communication equipment B → switch → subscriber equipment.
In this example, constantly to other not elected cast communication equipment (that is: the cast communication device A sends query message), the cast communication device A receives query message to elected cast communication equipment B, does not send query message, does not generate multicast forward table.When because transmission link fault or cast communication equipment B fault, the cast communication device A does not receive the query message that sends from the cast communication equipment B in the certain hour scope, the cast communication device A is initiated the cast communication equipment election in the user vlan 2 again, suppose that the cast communication device A is elected, then the cast communication device A sends query message to obtain group membership's relation and to generate multicast forward table, carry out the message of forwarding multicasting VLAN1, promptly forward-path is: multicast source → Router C → cast communication device A → switch → subscriber equipment.
In the specific implementation, as shown in Figure 7, a kind of cast communication equipment of the embodiment of the invention comprises:
Wherein, as shown in Figure 8, described election module comprises:
Sending module 8101 is used for sending first query message to other cast communication equipment, carries this cast communication equipment corresponding address information in described first query message;
Address information acquisition module 8103 is used for obtaining from the query message that described receiver module 8102 receives the address information of each cast communication equipment;
In another execution mode of the embodiment of the invention, described election module comprises further and comprising:
In embodiments of the present invention, as shown in Figure 9, described forwarding module comprises:
Member relation acquisition module 8201 is used for when this cast communication equipment is elected, sends query message to obtain group membership's relation by the multicast member in the user vlan of this cast communication equipment ownership;
Transmit generation module 8202, be used for concerning the generation multicast forward table according to the group membership that described member relation acquisition module 8201 obtains;
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement by hardware.Based on such understanding, all or part of can the embodying that technical scheme of the present invention contributes to background technology with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, perhaps cast communication equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
According to implementing a kind of method for multicast communication, system and the cast communication equipment that the embodiment of the invention proposes, the user in the dual-homed or multi-home networking, transmit data by in a plurality of cast communication equipment of user attaching, electing a cast communication equipment, solve all cast communication device forwards data of prior art user attaching and cause user terminal to receive the technical problem of repeating data, improved the reliability and the service quality of cast communication.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (12)
1. the method for a cast communication is characterized in that, at least two the cast communication equipment of user attaching in user's virtual LAN VLAN, and described method comprises:
In described at least two cast communication equipment of user attaching, conduct an election, and elect a cast communication equipment, specifically comprise: the first cast communication equipment of user attaching sends query message to other cast communication equipment, and receive the query message that described other cast communication equipment sends, when the described first cast communication equipment receives the query message of described other cast communication equipment transmission in the default time, from described query message, obtain the address information of described other communication equipment, and determine that according to described address information a cast communication equipment is elected, perhaps when the described first cast communication equipment is not received the query message of described other cast communication equipment in default time range, determine that then the described first cast communication equipment is elected;
The message that the cast communication device forwards M-VLAN that utilization elects sends.
2. in accordance with the method for claim 1, it is characterized in that, carry the address information of the cast communication equipment that sends described query message in the described query message.
3. in accordance with the method for claim 1, it is characterized in that the described message of the cast communication device forwards M-VLAN transmission of described election that utilizes comprises:
Other not elected cast communication equipment and the multicast member of elected cast communication equipment in the user vlan of its ownership sends query message to obtain group membership's relation;
Concern the generation multicast forward table according to the group membership who obtains;
According to described multicast forward table the message that described M-VLAN sends is forwarded.
4. in accordance with the method for claim 3, it is characterized in that, also comprise:
The query message that described not elected cast communication equipment receiving group communication equipment sends is not transmitted described query message, does not generate multicast forward table.
5. in accordance with the method for claim 3, it is characterized in that, also comprise:
Multicast member in the user vlan of described user attaching receives the query message that described elected cast communication equipment sends, and postbacks response Report message to described elected cast communication equipment.
6. in accordance with the method for claim 4, it is characterized in that, also comprise:
When described elected cast communication equipment does not receive the query message that described elected cast communication equipment sends in the Preset Time scope, then re-elect out a cast communication equipment that is used for the message that forwarding multicasting VLAN sends.
7. a cast communication equipment is characterized in that, comprising:
The election module, be used for conducting an election with other cast communication equipment that belongs to same user vlan, this election module comprises: send the sending module of first query message, the address information of carrying this cast communication equipment in wherein said first query message to other cast communication equipment; Be used to receive the receiver module of second query message that other cast communication equipment sends, carry the address information of the cast communication equipment that sends this second query message in wherein said second query message; The address information that is used for obtaining from the query message that described receiver module receives each cast communication equipment that the address information acquisition module and being used for of the address information of each cast communication equipment obtains according to described address information acquisition module is determined the elected cover half piece really of a cast communication equipment;
Forwarding module is used for when the election results of described election module are elected to for this cast communication equipment the message that forwarding multicasting VLAN sends.
8. according to the described cast communication equipment of claim 7, it is characterized in that described election module further comprises:
Judge module is used to judge whether described receiver module receives the query message that other cast communication equipment sends in default time range, when not receiving described query message, determines that this cast communication equipment is elected.
9. according to the described cast communication equipment of claim 7, it is characterized in that described forwarding module comprises:
The member relation acquisition module is used for sending query message to obtain group membership's relation to the multicast member of the user vlan of this cast communication equipment ownership;
Transmit generation module, be used for concerning the generation multicast forward table according to the group membership that described member relation acquisition module obtains;
The message sending module is used for transmitting the message that described M-VLAN sends according to the described multicast forward table of transmitting the generation module generation.
10. multicast communication system, it is characterized in that, comprise at least two cast communication equipment in the user vlan of user attaching, wherein, sending query message between the described cast communication equipment mutually conducts an election, particularly, the first cast communication equipment of user attaching sends query message to other cast communication equipment, and receive the query message that described other cast communication equipment sends, when the described first cast communication equipment receives the query message of described other cast communication equipment transmission in the default time, from described query message, obtain the address information of described other communication equipment, and determine that according to described address information a cast communication equipment is elected, perhaps when the described first cast communication equipment is not received the query message of described other cast communication equipment in default time range, determine that then the described first cast communication equipment is elected, the message that described elected cast communication device forwards M-VLAN is sent.
11., it is characterized in that described elected cast communication equipment is used for sending query message to the multicast member of described user vlan and other not elected cast communication equipment, obtains the multicast member relation according to the described multicast communication system of claim 10.
12. according to the described multicast communication system of claim 11, it is characterized in that, described not elected cast communication equipment is used to receive the query message that described elected cast communication equipment sends, and when in the Preset Time scope, not receiving the query message that described elected cast communication equipment sends, then re-elect out a cast communication equipment that is used for the message that forwarding multicasting VLAN sends.
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| CN2008101980529A CN101345678B (en) | 2008-08-27 | 2008-08-27 | Multicast communication method, system and multicast communication equipment |
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| CN2008101980529A CN101345678B (en) | 2008-08-27 | 2008-08-27 | Multicast communication method, system and multicast communication equipment |
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| CN101345678A CN101345678A (en) | 2009-01-14 |
| CN101345678B true CN101345678B (en) | 2011-04-06 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102752197B (en) * | 2012-06-25 | 2018-12-07 | 浙江宇视科技有限公司 | A kind of method and interchanger for simulating igmp querying device |
| CN104717143B (en) * | 2015-03-12 | 2018-03-02 | 华为技术有限公司 | For returning the method and apparatus of scene muticast data transmission more |
| CN107888991B (en) * | 2017-11-10 | 2020-04-10 | 深圳市创维软件有限公司 | Network link processing method, device and computer readable storage medium |
| CN112511443B (en) * | 2020-03-26 | 2024-08-23 | 中兴通讯股份有限公司 | Message processing method, device, equipment, storage medium and system |
| CN114499627B (en) * | 2021-12-20 | 2023-10-31 | 中国电信股份有限公司卫星通信分公司 | Content multicast system and method based on terminal election mode under satellite multi-beam |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486038A (en) * | 2003-08-29 | 2004-03-31 | 北京港湾网络有限公司 | Control method for exact multicast forwarding |
| CN1728674A (en) * | 2004-07-29 | 2006-02-01 | 中兴通讯股份有限公司 | Method and device for implementing upper ring and lower ring of flexible gruoping ring |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486038A (en) * | 2003-08-29 | 2004-03-31 | 北京港湾网络有限公司 | Control method for exact multicast forwarding |
| CN1728674A (en) * | 2004-07-29 | 2006-02-01 | 中兴通讯股份有限公司 | Method and device for implementing upper ring and lower ring of flexible gruoping ring |
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