CN1852249A - Multi-cast broadcasting business realizing method - Google Patents

Multi-cast broadcasting business realizing method Download PDF

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Publication number
CN1852249A
CN1852249A CNA2005101257837A CN200510125783A CN1852249A CN 1852249 A CN1852249 A CN 1852249A CN A2005101257837 A CNA2005101257837 A CN A2005101257837A CN 200510125783 A CN200510125783 A CN 200510125783A CN 1852249 A CN1852249 A CN 1852249A
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CN
China
Prior art keywords
multicast
going port
multicast group
access device
going
Prior art date
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Granted
Application number
CNA2005101257837A
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Chinese (zh)
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CN100466614C (en
Inventor
王德义
罗勇
赵望生
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB2005101257837A priority Critical patent/CN100466614C/en
Publication of CN1852249A publication Critical patent/CN1852249A/en
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    • H—ELECTRICITY
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    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/225—Calculation of statistics, e.g. average, variance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
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    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
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    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Abstract

When asking for joining a multicast group, user sends report message in Internet group management protocol (IGMP) of the multicast group to access equipment; based on value of actual load of each available up going port, and load value setup in advance, the access equipment determines a up going port going to transfer multicast data of the multicast group; and through the determined up going port, the received report message in IGMP is sent to multicast route; after multicast route receiving the report message in IGMP from the access equipment, multicast route sends the multicast data of the multicast group through the determined up going port in the access equipment to the access equipment; then, the access equipment sends the multicast data to the user. The invention avoids unbalanced load of multicast service carried by up going port in access equipment so as to raise transmission efficiency.

Description

A kind of method that realizes multicast service
Technical field
The present invention relates to the IP technical field of multicast, particularly relate to a kind of method that realizes multicast service.
Background technology
The IP multicast is meant that certain that in IP network packet is sent in the network determines the node subclass, and this subclass is called multicast group.The basic thought of IP multicast is that source host only sends a multicast packet, and the destination address in this part multicast packet is a multicast group address, and all multicast users in the multicast group can receive same data copy.Utilize the multicast feature of network, operator can provide some new value-added services easily, comprises the information service field of the Internets such as online live, Web TV, long-distance education, tele-medicine, network radio station, real-time video meeting.
In general, realize that multicast service needs the equipment in the network to support Internet group management protocol of the multicast group (IGMP, Internet Group Management Protocol), just can add certain multicast group, become the member of this multicast group by this agreement user.
In actual applications, the user may need to realize multicast service by the mode that access device links to each other with multicast router.Fig. 1 is the user realizes multicast service by access device a networking structure schematic diagram.As shown in Figure 1, comprise in this networking structure:
Multicast source is used to finish the generation and the encryption of multicast data message, and multicast data message is transmitted to multicast router;
Multicast router be used to receive and handle the multicast data message of being imported by multicast source, and the multicast data message after will handling is transmitted to access device; Be used to receive and handle IGMP report message or the IGMP leave message of importing by access device; Can also be used for sending the igmp querying message, and the response condition of access device is correspondingly handled to access device;
Access device is used to receive and handle the multicast data message of being imported by multicast router, and the multicast data message after handling is transmitted to the user; Be used to receive and handle IGMP report message or the IGMP leave message of importing by the user; Can also be used for sending the igmp querying message, and by user's response condition relation be transmitted on multicast data message ground and safeguarded to the user;
The user by sending IGMP report message or leave message, to experience multicast service, replys the igmp querying message of access device simultaneously by the IGMP report message, to safeguard the forwarding relation of multicast data message.
In actual applications, access device generally has a plurality of up going ports, and what link to each other with access device also has a plurality of users, and different users can require to add different multicast group, and access device is bound each multicast group and the some up going ports of self in advance.In general, multicast router only sends the multicast packet that the user needs to access device, and promptly as long as the member of multicast group is not empty, multicast router will be given access device with the muticast data transmission of this multicast group.When the user adds certain multicast group, and when being first multicast member of this multicast group, realize that the conventional method of multicast service is: the user sends the IGMP report message of certain multicast group to access device; Access device receives after user's the IGMP report message, sends the IGMP report message of this multicast group to multicast router by the up going port with this multicast group binding; After multicast router receives the IGMP report message that access device sends, the multicast data message of this multicast group is sent to access device by the up going port with this multicast group binding; Access device sends to the user with the multicast data message of multicast group again.
In the prior art because access device can only send the IGMP report message to multicast router by the up going port with multicast group binding, also can only by with the up going port receiving multicast data of multicast group binding, access device can't be selected up going port.When multicast user's the binding situation of multicast group between a plurality of up going ports of access device is unbalanced, just may cause each up going port multicast service load of access device unbalanced.Such as: access device has 3 up going ports, is respectively up going port 1, up going port 2 and up going port 3.Multicast source can provide multicast group A to multicast group F totally 6 multicast group for the user, and regulation binds multicast group A to multicast group D and up going port 1, and multicast group E and up going port 2 are bound, and multicast group F and up going port 3 are bound.If these 6 multicast group all have the multicast user, then having in 6 multicast group of multicast user has 4 multicast group to bind up going port 1, there is 1 multicast group to bind up going port 2 and up going port 3 respectively, promptly has multicast user's the binding situation of multicast group between a plurality of up going ports of access device unbalanced.Under above-mentioned situation, up going port 1 will transmit the multicast packet of 4 multicast group, and up going port 2 and up going port 3 only transmit the multicast packet of 1 multicast group respectively.Obviously, up going port 1 has been born more traffic load than up going port 2 and up going port 3.
Again such as: access device has 3 up going ports, is respectively up going port 1, up going port 2 and up going port 3.Multicast source can provide multicast group A to multicast group F totally 6 multicast group for the user, and regulation is bound multicast group A and multicast group B and up going port 1, multicast group C and multicast group D and up going port 2 are bound, multicast group E and multicast group F and up going port 3 are bound.If multicast group A and multicast group B have the multicast user, other multicast group does not all have the multicast user, then there are 2 multicast group of multicast user all to bind up going port 1, promptly have multicast user's the binding situation of multicast group between a plurality of up going ports of access device unbalanced.Under above-mentioned situation, up going port 1 will transmit the multicast packet of 2 multicast group in the access device, and up going port 2 and up going port 3 then do not have any business burden.
So, in the prior art, when multicast user's the binding situation of multicast group between a plurality of up going ports of access device is unbalanced, just may cause each up going port multicast service load of access device unbalanced, influence the efficiency of transmission of access device.
This shows in the prior art, also do not have a kind of access device up going port of can avoiding to bear the multicast service unbalanced multicast service implementation method of loading.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that realizes multicast service.In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of method that realizes multicast service may further comprise the steps:
A, user send the Internet group management protocol of the multicast group IGMP report message of this multicast group to access device;
B, access device determine to transmit the up going port of this multicast group multicast packet according to the actual load value and the predefined load value of each available up going port, and the IGMP report message that receives is sent to multicast router by the up going port of determining;
C, multicast router send to access device with the multicast packet of this multicast group by the up going port of determining in the access device, and access device sends to the user again.
Preferably, when the access device up going port was unavailable, this method further comprised:
A, access device judge whether this up going port has born the task of transport multicast group data, if, execution in step b then; Otherwise, direct ending said process;
B, access device are selected a multicast group of carrying out muticast data transmission by this unavailable up going port, again according to the actual load value and the predefined load value of each available up going port, determine to transmit the up going port of this multicast group multicast packet, and the up going port that passes through to determine sends the IGMP report message to multicast router, multicast router sends to access device with the multicast packet of this multicast group by the up going port of determining in the access device, and access device sends to the user again; Return this step and carry out, handle all multicast group of carrying out muticast data transmission by this unavailable up going port until access device.
Preferably, described actual load value is: the multicast group number of actual transmissions multicast packet;
Described predefined load value is: the preset value of multicast group number;
Described actual load value and predefined load value according to each available up going port, determine that the up going port method that will transmit this multicast group multicast packet is:
Access device is determined the multicast group number of each up going port actual transmissions multicast packet, get the multicast group number of each up going port actual transmissions multicast packet and the ratio of multicast group number preset value more respectively, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
Preferably, described actual load value is: the multicast group number of actual transmissions multicast packet;
Described predefined load value is: the relative value of bearing load;
Described actual load situation and predefined load value according to each available up going port, determine that the up going port method that will transmit this multicast group multicast packet is:
Access device is determined the multicast group number of each available up going port actual transmissions multicast packet, get the multicast group number of each available up going port actual transmissions multicast packet more respectively and bear the ratio of the relative value of load, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
Preferably, described actual load value is: the multicast group number of actual transmissions multicast packet;
Described predefined load value is: the relative value of bearing load;
Described actual load situation and predefined load value according to each available up going port, determine that the up going port method that will transmit this multicast group multicast packet is:
Access device is determined the multicast group number of each available up going port actual transmissions multicast packet, and determine the relative multicast group number of each available up going port according to multicast group sum and the relative value of bearing load, get the ratio of multicast group number with the relative multicast group number of each available up going port actual transmissions multicast packet more respectively, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
In sum, the a kind of of the present invention's proposition realizes that the method for multicast service can be when the user adds certain multicast group, access device can be selected the up going port of this multicast group multicast packet of transmission, rather than directly transmit with the up going port of binding in advance, can avoid each up going port of access device to bear the unbalanced of multicast service load, improve the access device efficiency of transmission.
Description of drawings
Fig. 1 is a networking structure schematic diagram of realizing multicast service;
Fig. 2 is the flow chart that the present invention realizes multicast service;
Fig. 3 is a flow chart of using the present invention program's embodiment one realization multicast service;
Fig. 4 is a flow chart of using the present invention program's embodiment two realization multicast services.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention realizes that the basic thought of multicast service is: when the user will add certain multicast group, when becoming first multicast member of this multicast group, the user sends the Internet group management protocol of the multicast group IGMP report message of this multicast group to access device; Access device determines to transmit the up going port of this multicast group multicast packet according to the actual load value and the predefined load value of each available up going port, and the IGMP report message that receives is sent to multicast router by the up going port of determining; Multicast router sends to access device with the multicast packet of this multicast group by the up going port of determining in the access device, and access device sends to the user again.
When the up going port in the access device normally during multicast data transmission, just claim that this up going port is available up going port, otherwise, be unavailable up going port.In actual applications, the disabled reason of the up going port of access device may for: the bottom link is unavailable, multicast traffic stream interrupts or do not receive igmp querying message etc. from main with up link in the time interval of setting.
The actual load value of access device up going port can be weighed with the multicast group number of carrying out muticast data transmission by this up going port, and the multicast group number is many more, and the load of this up going port is just big more.
In addition, because in actual applications, access device may just not be used to transmit the data relevant with multicast service, also needs to transmit other business datum, and the load that can bear of each up going port of access device also may be different so.So,, can preestablish load value for each up going port of access device at the concrete condition of up going port in the practical application.This load value can be the preset value of multicast group number, also can be for bearing the relative value of load.Wherein, the preset value of multicast group number is that access device can be set to the actual multicast group number that the user provides according to system, and the preset value sum of each up going port multicast group number is exactly actual multicast group number; And the relative value of bearing load is the ratio that each up going port of access device is born load.
Fig. 2 is the flow chart that the present invention realizes multicast service.As shown in Figure 2, when the user will add certain multicast group, and when being first multicast member of this multicast group, the present invention realizes that the step of multicast service comprises:
Step 201: the user sends the IGMP report message of this multicast group to access device;
Step 202: access device is according to the actual load value and the predefined load value of each available up going port, determine to transmit the up going port of this multicast group multicast packet, and the IGMP report message that receives is sent to multicast router by the up going port of determining;
Step 203: multicast router sends to access device with the multicast packet of this multicast group by the up going port of determining in the access device;
Step 204: access device sends to this user with the multicast data message of this multicast group again.
In actual applications, when the access device up going port is unavailable, access device can also be reassigned for being transmitted by other available up going port in the access device, to reach the purpose of link backup carried out the multicast group of muticast data transmission originally by disabled up going port.Reassigning the method that other available up going port transmits is:
A, access device judge whether this up going port has born the task of transport multicast group data, if, execution in step b then; Otherwise, direct ending said process;
B, access device are selected a multicast group of carrying out muticast data transmission by this unavailable up going port, again according to the actual load value and the predefined load value of each available up going port, determine to transmit the up going port of this multicast group multicast packet, and the up going port that passes through to determine sends the IGMP report message to multicast router, multicast router sends to access device with the multicast packet of this multicast group by the up going port of determining in the access device, and access device sends to the user again; Return this step and carry out, handle all multicast group of carrying out muticast data transmission by this unavailable up going port until access device.
Access device is according to above-mentioned method, all multicast group of carrying out muticast data transmission by unavailable up going port originally can be reassigned other available up going port transmission of serving as reasons.
Embodiment one
Fig. 3 is a flow chart of using the present invention program's embodiment one, and in the present embodiment, access device has 3 up going ports, is respectively up going port 1, up going port 2 and up going port 3, all is available up going port; Access device connects 10 multicast users, is respectively multicast user 1 to multicast user 10; The relative value that default 3 up going ports are born load is respectively 3,2 and 1, and promptly the load ratio between the up going port is up going port 1: up going port 2: up going port 3=3: 2: 1,3 default values of up going port were respectively 3,2,1; Multicast source can be the user altogether 6 multicast group is provided, and is respectively multicast group A to multicast group F.In the present embodiment, user 1 is multicast members of multicast group A to user 3, and the multicast packet of multicast group A is from up going port 1 input of access device; User 4 and user 5 are the multicast member of multicast group B, and the multicast packet of multicast group B is from up going port 1 input of access device; User 6 is multicast members of multicast group C to user 8, and the multicast packet of multicast group C is from up going port 2 input of access device; User 9 is the multicast member of multicast group D, and the multicast packet of multicast group D is from up going port 3 inputs of access device; User 10 does not belong to any multicast group.
When user 10 will add multicast group E, present embodiment realized that the step of multicast service comprises:
Step 301: user 10 sends the IGMP report message of multicast group E to access device.
Step 302: access device receives after user 10 the IGMP report message, determine the multicast group number of each up going port actual transmissions multicast packet, get the multicast group number of each available up going port actual transmissions multicast packet respectively and bear the ratio of the relative value of load, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
In the present embodiment, 3 up going ports all are available up going ports in the access device, multicast group number under the up going port 1 actual transmissions multicast packet is 2, and the multicast group number under the up going port 2 actual transmissions multicast packets is 1, and the multicast group number under the up going port 3 actual transmissions multicast packets is 1; In addition, 3 up going ports relative value of bearing load is respectively 3,2 and 1; Access device is respectively 2/3,1/2 and 1 with the multicast group number under the actual transmissions multicast packet and the ratio of preset value separately, the ratio minimum of up going port 2 wherein, so, access device with up going port 2 as this with the up going port that uses.
In actual applications, predefined load value can be the preset value of multicast group number, then access device can be got the multicast group number of each up going port actual transmissions multicast packet and the ratio of multicast group number preset value respectively, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
In actual applications, if predefined load value is still for bearing the relative value of load, access device can also be after the multicast group number of determining each available up going port actual transmissions multicast packet, determine the relative multicast group number of each available up going port according to multicast group sum and the relative value of bearing load, get the ratio of multicast group number with the relative multicast group number of each available up going port actual transmissions multicast packet more respectively, and with the up going port of the ratio minimum preset value as the up going port of this multicast group multicast packet of transmission.Here, relatively the multicast group number is exactly that the up going port multicast group number of bearing the relative value correspondence of load is determined.Such as: the relative value that 3 up going ports are born load is a up going port 1: up going port 2: up going port 3=3: 2: 1; Actual multicast group adds up to 12, and then up going port 1 to up going port 3 relative multicast group numbers are respectively 6,4,2; If the multicast group number of each up going port actual transmissions multicast packet is respectively 2,1,1, then the ratio of the multicast group number of each available up going port actual transmissions multicast packet and relative multicast group number is respectively 2/6,1/4 and 1/2, and access device is with the up going port of up going port 2 as transport multicast group multicast packet.
Step 303: access device sends to multicast router with the IGMP report message of user 10 multicast group E by up going port 2.
Step 304: after multicast router receives the IGMP report message that access device sends, the multicast data message of multicast group E is sent to access device by up going port 2.
Step 305: access device sends to user 10 with the multicast data message of multicast group E again, and user 10 will watch group broadcasting program E.
Embodiment two
Fig. 4 is embodiment two flow charts of using the present invention program, and in the present embodiment, access device has 3 up going ports, is respectively up going port 1, up going port 2 and up going port 3, all is available up going port; Access device connects 10 users, is respectively user 1 to user 10; The relative value that 3 up going ports are born load is respectively 3,2 and 1; Multicast source can provide 6 group broadcasting programs altogether, and 6 multicast group promptly can be arranged, and is respectively multicast group A to multicast group F.In the present embodiment, user 1 is the multicast member of multicast A to user 3, and the multicast packet of multicast group A is from up going port 1 input of access device; User 4 and user 5 are the multicast member of multicast group B, and the multicast packet of multicast group B is from up going port 1 input of access device; User 6 is the multicast member of multicast group C to user 8, and the multicast packet of multicast group C is from up going port 2 input of access device; User 9 is the multicast member of multicast group D, and the multicast packet of multicast group D is from up going port 3 inputs of access device.
When up going port 2 was unavailable, access device can be reassigned the multicast packet of the multicast group of the disabled up going port transmission of former cause for being transmitted by other available up going port in the access device in the present embodiment, and the step of its realization comprises:
Step 401: access device judges whether up going port 2 has born the task of multicast data transmission, if then execution in step 402; Otherwise, direct ending said process.
In the present embodiment, up going port 2 has been born the task of multicast data transmission, and then execution in step 402.
Step 402: access device is selected a multicast group of carrying out muticast data transmission by up going port 2.
In the present embodiment, up going port 2 has only a multicast group C, then directly selects multicast group C.
Step 403: access device is determined the multicast group number of each available up going port actual transmissions multicast packet, get the multicast group number of each available up going port actual transmissions multicast packet more respectively and bear the ratio of the relative value of load, and with the up going port of the ratio minimum up going port as transport multicast group C multicast packet.
In the present embodiment, because up going port 2 is unavailable, available up going port has only up going port 1 and up going port 3, and the multicast group number under their actual transmissions multicast packets is respectively 2 and 1; The relative value that up going port 1 and up going port 3 are born load is respectively 3 and 1, and the multicast group number of up going port 1 and up going port 3 is respectively 2/3 and 1 with the ratio of bearing the relative value of load, and then access device is with the up going port of up going port 1 as transport multicast group C multicast packet.
In actual applications, predefined load value can be the preset value of multicast group number, then access device can be got the multicast group number of each up going port actual transmissions multicast packet and the ratio of multicast group number preset value respectively, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
In actual applications, if predefined load value is still for bearing the relative value of load, access device can also be after the multicast group number of determining each available up going port actual transmissions multicast packet, determine the relative multicast group number of each available up going port according to multicast group sum and the relative value of bearing load, get the ratio of multicast group number with the relative multicast group number of each available up going port actual transmissions multicast packet more respectively, and with the up going port of the ratio minimum preset value as the up going port of this multicast group multicast packet of transmission.Here, relatively the multicast group number is exactly that the up going port multicast group number of bearing the relative value correspondence of load is determined.
Step 404: access device sends to multicast router with the IGMP report message of multicast group C by up going port 1.
Step 405: after multicast router receives the IGMP report message that access device sends, the multicast data message of multicast group C is sent to access device by up going port 1.
Step 406: access device sends to user 6 to user 8 with the multicast data message of multicast group C again, and user 6 will continue to watch group broadcasting program C to user 8.
Step 407: access device judges whether to handle all multicast group of up going port 2, if, ending said process then, otherwise, step 402 returned.
In the present embodiment, up going port 2 has only multicast group C, then need not return step 402.In actual applications, unavailable up going port also may be responsible for transmitting the multicast packet of a plurality of multicast group, then access device to step 406, is reassigned repeated execution of steps 402 into till being transmitted by other available up going port of access device up to the transformation task of the multicast packet that all disabled up going ports of former cause are responsible for transmitting.Access device is handled the order of a plurality of multicast group in the unavailable up going port and can be determined arbitrarily, also can determine the order of handling according to IP number of multicast group.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1, a kind of method that realizes multicast service is characterized in that, when the user will add certain multicast group, this method may further comprise the steps:
A, user send the Internet group management protocol of the multicast group IGMP report message of this multicast group to access device;
B, access device determine to transmit the up going port of this multicast group multicast packet according to the actual load value and the predefined load value of each available up going port, and the IGMP report message that receives is sent to multicast router by the up going port of determining;
C, multicast router send to access device with the multicast packet of this multicast group by the up going port of determining in the access device, and access device sends to the user again.
2, method according to claim 1 is characterized in that, when the access device up going port was unavailable, this method further comprised:
A, access device judge whether this up going port has born the task of transport multicast group data, if, execution in step b then; Otherwise, direct ending said process;
B, access device are selected a multicast group of carrying out muticast data transmission by this unavailable up going port, again according to the actual load value and the predefined load value of each available up going port, determine to transmit the up going port of this multicast group multicast packet, and the up going port that passes through to determine sends the IGMP report message to multicast router, multicast router sends to access device with the multicast packet of this multicast group by the up going port of determining in the access device, and access device sends to the user again; Return this step and carry out, handle all multicast group of carrying out muticast data transmission by this unavailable up going port until access device.
3, method according to claim 1 and 2 is characterized in that, described actual load value is: the multicast group number of actual transmissions multicast packet;
Described predefined load value is: the preset value of multicast group number;
Described actual load value and predefined load value according to each available up going port, determine that the up going port method that will transmit this multicast group multicast packet is:
Access device is determined the multicast group number of each up going port actual transmissions multicast packet, get the multicast group number of each up going port actual transmissions multicast packet and the ratio of multicast group number preset value more respectively, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
4, method according to claim 1 and 2 is characterized in that, described actual load value is: the multicast group number of actual transmissions multicast packet;
Described predefined load value is: the relative value of bearing load;
Described actual load situation and predefined load value according to each available up going port, determine that the up going port method that will transmit this multicast group multicast packet is:
Access device is determined the multicast group number of each available up going port actual transmissions multicast packet, get the multicast group number of each available up going port actual transmissions multicast packet more respectively and bear the ratio of the relative value of load, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
5, method according to claim 1 and 2 is characterized in that, described actual load value is: the multicast group number of actual transmissions multicast packet;
Described predefined load value is: the relative value of bearing load;
Described actual load situation and predefined load value according to each available up going port, determine that the up going port method that will transmit this multicast group multicast packet is:
Access device is determined the multicast group number of each available up going port actual transmissions multicast packet, and determine the relative multicast group number of each available up going port according to multicast group sum and the relative value of bearing load, get the ratio of multicast group number with the relative multicast group number of each available up going port actual transmissions multicast packet more respectively, and with the up going port of the ratio minimum up going port as this multicast group multicast packet of transmission.
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