CN102694666B - Multicast service processing method and device - Google Patents
Multicast service processing method and device Download PDFInfo
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Abstract
The invention relates to a multicast processing method and device, which belong to the field of communication. The device adopts an intelligent decision-making manner, an intelligent decision-making device is additionally arranged in a multicast processing system, the multicast channels of an access network, which are frequently used by a user, can be obtained through accumulated statistics, and the access equipment can actively obtain the multicast flow of the multicast channels frequently used by the user, so that the access delay of the multicast channels is shortened, and the multicast processing efficiency is improved.
Description
Technical field
The present invention relates to the communications field, relate to the multicast service handling method on a kind of data network and equipment especially.
Background technology
Multicasting technology is a kind of point-to-multipoint network technology, its objective is the burden alleviating offered load and media server.Fig. 1 is multi-cast system structural representation, and as diagram, multi-cast system is made up of video multicasting system, IP metropolitan area network, access network and home network four part.Multicast service system realizes video user management, CA/DRM, Video coding function, then video traffic is transmitted into IP metropolitan area network; Video traffic is delivered to broadband access network by IP multicast functionality by IP metropolitan area network; Access Network realizes the controlling functions that video group adds or leaves, and video stream user needed is to user.
Access Network can comprise Layer 2 switch (can for ATM switch or Ethernet switch) and DSLAM equipment, and the physical circuit connection such as FE or xDSL adopted between user.Video multicast stream is sent to the access device of the direct access user such as Layer 2 switch or DSLAM equipment from IP metropolitan area network, according to Internet igmpinternet (the Internet Group Management Protocol of user, be called for short IGMP), control message by video stream to the user needed.
At present, PC or STB on-demand multicasting program, the general multicast protocol adopting IGMP agreement (V1, V2 or V3 version), IGMP agreement is a kind of agreement be carried in IP agreement.Agreement defines client and multicast router two entities, and the corresponding above-mentioned networks of these two entities are exactly video terminal (user 1 or user 2) in Fig. 2 and access device 102.
When user intends to add multicast group, flow process is as follows:
(1) STB (Set-top Box) obtains an IP address by sending DHCP message;
(2) username and password that STB reports is verified, obtain electric program guide;
(3) user carries out program selection;
(4) after choosing program, STB just sends an IGMP and joins message, IP metropolitan area network is set up multicast mapping table (group and VLAN correspondence, and VLAN is corresponding with access device) and access device on set up multicast forward table (group corresponding to interface board port), set up the binding of multicast service and PVC simultaneously;
(5) user watches group broadcasting program.
Fig. 3 is a kind of method schematic diagram of existing access device inter-process multicast service, and as diagram, access device 102 comprises master control borad 300 and at least one interface board 310, and each interface board 310 is connected with master control borad 300 respectively.Wherein master control borad 300 is made up of master control borad multicast processing unit 301, master control borad multicast forward table 302 and master control borad multicast replication unit 303, and interface board 310 is made up of interface board multicast forward table 311 and interface board multicast replication unit 312.Master control borad multicast processing unit 301 is according to Multicast configuration, configure master control borad multicast forward table 302 and the interface board multicast forward table 311 of master control borad respectively, when receiving the network multicast stream that network side issues, master control borad multicast replication unit 303 is according to master control borad multicast forward table 302, the multicast data flow issued by network copies to corresponding veneer, when user needs to user multicast, interface board multicast replication unit 312 copies to user port according to interface board multicast forward table 311.
In the prior art, after the multicast receiving user when access device joins request, adopt IGMP Proxy or the process of IGMP Snoopy mode, up send IGMP message or transparent transmission IGMP message; After the edge device process of IP metropolitan area network above, issue multicast data flow to access device.But, adopt this technical scheme will cause following technical problem:
(1) disposal ability of subscriber equipment is restricted.Master control borad due to access device needs process the IGMP message of all user sides and be sent to the control message of network side, and, when multiple user adds a program source simultaneously, access device needs all to deal with the IGMP request message of every user, there is a large amount of work for the treatment of repeated, when a large number of users reaches the standard grade Switch Video business channels, the performance of access device cannot be competent at.
(2) process of edge device and data distributing need certain time delay, thus cause user's program switch speed to be affected, and customer experience is deteriorated.
In order to solve the delay problem of multicast process, there is a solution at present, this solution is all pushed on access device by group broadcasting program, and such access device does not need up to send control message, saves the process of multicast.But, in conjunction with network practical problem, if adopt this technical scheme, following problem will be caused:
(1) when multicast channel is a lot, particularly, the bandwidth of each program of looking ahead is more and more higher, and the bandwidth of 4M to 20M is all possible, and the fixed-bandwidth that this technical scheme makes multicast take increases greatly.Such as, consider 1000 multicast channels, average every program needs the bandwidth taken to be 5M, and so, this multicast will need the fixed-bandwidth of 20G from edge device to access device, with the propelling movement specially for flux of multicast.Obviously, this is not receivable in actual applications.
(2) if access device adopt be tree-shaped distribution forward mode, owing to all flux of multicast all can not be pushed to interface board in whole system inside, thus this technical scheme is not suitable for the access device of the pass-through mode of tree-shaped distribution, and network compatibility is poor.
In a word, this technical scheme exploitativeness is poor, is not suitable for practicing.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of multicast processing method, to improve multicast treatment effeciency.
The technical problem to be solved in the present invention also provides a kind of access device, to improve multicast treatment effeciency.
For solving above-mentioned first technical problem, the object of the invention is to be achieved through the following technical solutions:
A kind of multicast processing method, comprising:
Obtain user and commonly use multicast channel, it is that the weights of program request frequency or the described frequency received by each interface board in access device are high that described user commonly uses multicast channel, or the channel that the Annual distribution scope of the weights of program request frequency or described frequency is wide commonly uses multicast channel as the user in described access device;
When user's request adds described conventional multicast channel, the master control borad of described access device adds interface board from the user place of described conventional multicast channel to described request sends the multicast data flow of the conventional multicast channel of asking.
A kind of access device, described access device comprises interface board 310 and master control borad 300, and described access device also comprises intelligent decision equipment 330;
Described intelligent decision equipment 330 is connected with described master control borad 300 with described interface board 310 respectively, multicast channel is commonly used for obtaining user, it is that the weights of program request frequency or the described frequency received by each interface board in access device are high that described user commonly uses multicast channel, or the channel that the Annual distribution scope of the weights of program request frequency or described frequency is wide commonly uses multicast channel as the user in described access device.
Further, owing to present invention employs the pattern of multicast distribution process, process user joined request concentrates on master control borad process by of the prior art, is distributed to interface board and master control borad associated treatment.When interface board exist multiple user add a program source time, master control borad only needs process first to ask, and can make full use of the disposal ability of system like this; And master control borad does not need distribution interface plate multicast list yet, greatly improves processing speed.
Accompanying drawing explanation
Fig. 1 is multi-cast system structural representation;
Fig. 2 is the relation schematic diagram of IP metropolitan area network, access device and user terminal;
Fig. 3 is existing access device processing multicast service method schematic diagram;
Fig. 4 is the method flow schematic diagram of embodiment 1;
Fig. 5 is the method flow schematic diagram of embodiment 2;
Fig. 6 is the system configuration schematic diagram of embodiment 4;
Fig. 7 is the system configuration schematic diagram of embodiment 5;
Fig. 8 is the system configuration schematic diagram of embodiment 6;
Fig. 9 is the system configuration schematic diagram of embodiment 7.
Figure number illustrates:
100: multicast service system, 101:IP metropolitan area networks, 102: access device,
103: modulator-demodulator, 104: Set Top Box, 105: television set,
106: computer, 300: master control borad, 301: master control borad multicast processing unit,
302: master control borad multicast forward table, 303: master control borad multicast replication unit,
310: interface board, 311: interface board multicast forward table, 312: interface board multicast replication unit,
313: interface board multicast processing unit; 320: intelligent decision equipment, 80: access network.
Embodiment
Core concept of the present invention is, intelligent decision equipment is added in multicast treatment system, by the multicast channel that cumulative statistics acquisition user commonly uses, access device is made to get the multicast data flow of the multicast channel that this user commonly uses on one's own initiative, thus reduce joining delay of multicast channel, improve multicast treatment effeciency.
In order to the those skilled in the art made better understands technical scheme of the present invention, below in conjunction with accompanying drawing and specific embodiment, the present invention is further detailed:
Embodiment 1:
The present embodiment, for the inner process to multicast of access device, is illustrated the inventive method.
Fig. 4 is the method flow schematic diagram of the present embodiment, and as diagram, this method comprises the following steps:
Step S401: obtain user and commonly use multicast channel.
The every interface board of periodic basis receives and is submitted to the multicast process information of master control borad multicast processing unit processes record, multicast group and the user of record multicast maintenance add and leave the time point of each multicast group, collect the play-on-demand program frequency in the every interface board of statistics and Annual distribution, and this statistics is added up further, obtain the distribution of channel in access device in certain relatively long-time interior each time period.Obtain access device inherent certain relatively long-time in program request frequency the highest or service time the longest several program frequencies commonly use multicast channel as user, and obtain the higher physical interface plate of this multicast channel program request frequency in interface board.In use specifically can merely according to the program request frequency of multicast channel or choose user the service time of channel and commonly use multicast channel, both can also choose user in conjunction with balance and commonly use multicast channel.
The statistics of this conventional frequency is except judging according to program request frequency merely, and the factor of the bandwidth that can also take in conjunction with this program frequency band, is weighted process to the program request frequency of this multicast channel, to make the more realistic application of the technical program.Its program request frequency specifically, in order to trade off bandwidth factor, for the program that occupied bandwidth is larger, is multiplied by a less weight factor by this weighting process.Such as, the program request frequency of multicast channel 1 be 200 times per minute, its bandwidth taken is 2M, the program request frequency of multicast channel 2 be 210 times per minute, its bandwidth taken is 5M.The program request frequency of multicast channel 3 be 300 times per minute, its bandwidth taken is 8M, suppose the weight rule according to presetting, weight factor for the less channel 1 of occupied bandwidth is: 1.1, weight factor for the bigger channel 2 of occupied bandwidth is: 1, and the weight factor for the larger channel 3 of occupied bandwidth is: 0.8.So, after weighting process, the frequency of channel 1 is: 220, and the frequency of channel 2 is: 210, and the frequency of channel 3 is: 240.Carry out statistical analysis to all multicast channel frequencies through weighting process, the several channels obtaining the frequency weight after weighting process the highest commonly use multicast channel as user.
Step S402: access device obtains the multicast data flow that this user commonly uses multicast channel.
According to the statistics of step S401, user's master control borad multicast processing unit sends request to network side, initiatively adding access customer to network side request commonly uses multicast channel, by network side according to received request, issues to access device the multicast data flow that this user commonly uses multicast channel.
Step S403: interface board receives user IGMP and joins request.
When user needs certain multicast channel of program request, send IGMP message, to ask this multicast channel of program request by STB to access device.
Step S404: this IGMP asks to submit master control borad to by interface board.
The all IGMP messages received in this interface board are committed to the master control borad multicast processing unit being attached thereto and connecing master control borad by each interface board, by this master control borad multicast processing unit processes.
Step S405: master control borad judges that whether the multicast data flow of asking is at master control borad, if so, performs step S407; Otherwise, perform step S406.
After master control borad receives the multicast data flow request of interface board transmission, the multicast data flow of asking is judged whether on master control borad according to the multicast group information of the multicast maintenance of described master control borad multicast processing unit record, if the multicast group information of the multicast maintenance recorded indicates current master control borad there is described asked multicast data flow, then asked multicast data flow is on master control borad; Otherwise the multicast data flow of asking is not on master control borad.
Step S406: generate multicast group in master control borad multicast forward table, and this interface board is added this multicast group, and generate multicast list at interface board multicast forward table, user is added this multicast.
Master control borad, in master control borad multicast forward table, increases the multicast group of this user institute on-demand multicasting channel, and the interface board (namely asking the interface board at user place) of being asked by this IGMP of this submission joins in this multicast group.
Side by side, master control borad multicast processing unit is asked according to this IGMP, generate the multicast group of the multicast data flow of this request multicast channel, and by asking the user added to join in this multicast group, then this multicast group is distributed to the interface board multicast forward table of the interface board submitting to this IGMP to ask.
Step S407: in master control borad multicast forward table, this interface board is joined multicast group, and generate multicast list at interface board multicast forward table, user is added this multicast.Then step S410 is jumped to.
The interface board that this IGMP of this submission asks is added in the multicast group of master control borad this request multicast channel in master control borad multicast forward table.
Side by side, master control borad multicast processing unit is asked according to this IGMP, generate the multicast group of the multicast data flow of this request multicast channel, and by asking the user added to join in this multicast group, then this multicast group is distributed to the interface board multicast forward table of the interface board submitting to this IGMP to ask.
Step S408: master control borad is to network side request multicast data flow data.
If access device not this user ask the multicast data flow of multicast channel, then master control borad sends to the edge device of network side and controls message; By being positioned at the edge device of IP metropolitan area network side by IP metropolitan area network, issue the multicast data flow of this multicast channel to multicast service system request; After multicast service center receives request, this multicast channel is adopted MPEG-2 coded format, is encoded into a road code stream and is encapsulated in UDP/IP message, push to IP metropolitan area network, after edge device, forwarded to access device by edge device.
Step S409: master control borad receives the multicast data flow that network issues.
When the multicast data flow that edge device forwards arrives access device, by master control borad multicast replication unit according to master control borad multicast forward table, judge whether this multicast data flow is required multicast data flow, if so, then receives this multicast data flow.
Step S410: master control borad sends multicast data flow to interface board.
After master control borad receives this multicast data flow, by the interface board of master control borad multicast replication unit according to this multicast data flow of request of the record in master control borad multicast forward table, this multicast data flow is copied on request interface plate.
Step S411: interface board sends multicast data flow according to multicast table to user.
After interface board receives this multicast data flow, the user of interface board corresponding to this multicast channel in interface board multicast forward table, copies to the user port of this user on this interface board by this multicast data flow.
This multicast data flow arrives user terminal by user port, after user receives this multicast data flow, just can watch the multicast channel of institute's program request.
As from the foregoing, because the present embodiment adds up the conventional channel obtaining this access device in access device, if the multicast channel of user's request is conventional channel, after so master control borad multicast processing unit receives this user IGMP request, directly can copy the multicast data flow of the multicast channel that propelling movement is asked to the interface board at user place from master control borad, and do not need to issue to network side request, thus reduce joining delay of multicast channel, improve multicast treatment effeciency.
Embodiment 2:
The present embodiment is treated to example with the multicast of access device inside, is illustrated the inventive method.
Inner to multicast process in order to optimize access device, in interface board, add the interface board multicast processing unit (interface board multicast processing unit 313 as shown in Figure 7) for carrying out multicast process.
Fig. 5 is the method flow diagram of the present embodiment, and as diagram, this method comprises the following steps:
Step S501: obtain user and commonly use multicast channel.
This step and the step S401 in embodiment 1 are in like manner, difference is, carry out for the user IGMP message docked received by oralia the interface board multicast processing unit that processes owing to adding in access board, therefore, the acquisition that user commonly uses multicast channel specifically adds according to the multicast group of the multicast maintenance of interface board multicast processing unit record and user and leaves the acquisition that time point is added up of each multicast group, in like manner, therefore not to repeat here for step S401 in the statistical method used and embodiment 1.
Further obtain this user according to statistics and commonly use higher or use this user to commonly use multicast channel to be commonly used by the multicast channel time longer physical interface plate interface board as this user conventional of the weights of the demanding channel of multicast channel or channel, and in master control borad multicast forward table, set up the multicast table that this user commonly uses multicast channel, and the interface board that each this user conventional commonly uses multicast channel is added to respective user commonly uses in the multicast table of multicast channel.
Step S502: the multicast data flow that obtained user is commonly used multicast channel corresponding is sent to interface board.
According to the statistics of step S401, master control borad multicast processing unit sends request to network side, initiatively adding access customer to network side request commonly uses multicast channel, by network side according to received request, issues to access device the multicast data flow that this user commonly uses multicast channel.
Master control borad receives after user that network issues commonly uses the multicast data flow of multicast channel, commonly used the multicast group of multicast channel according to this user in multicast forward table by master control borad multicast replication unit, the multicast data flow automatically this user being commonly used multicast channel is copied to this user conventional and commonly uses in the interface board of multicast channel.
Step S503: interface board receives user IGMP and joins request.
When user needs certain multicast channel of program request, send IGMP message, to ask this multicast channel of program request by STB to access device.
Step S504: judge that whether the multicast data flow of asking is at interface board, if so, perform step S505, otherwise, perform step S506.
According to the multicast group information of the multicast maintenance of described interface board multicast processing unit record, the interface board of access device judges that whether described multicast data flow is at interface board, if the multicast group information of the multicast maintenance recorded indicates the multicast group that current interface plate exists described asked multicast data flow, then asked multicast data flow is on interface board, otherwise the multicast data flow of asking is not on interface board.
If the multicast channel that this user asks is step S501 add up the conventional channel obtained, and this user commonly uses the multicast channel that weights are higher or service time is longer that multicast channel is program request frequency in this interface board or channel, so obvious in step S502, the multicast data flow this user having been commonly used multicast channel pushes to this interface board, and therefore interface board has existed this multicast data flow.
Step S505: in interface board multicast forward table, user is joined multicast group, jump to step S514.
This request user, in interface board multicast forward table, joins in the multicast group corresponding to multicast channel of its program request by interface board.
Step S506: generate multicast group in interface board multicast forward table.
In interface board multicast forward table, newly increase the multicast group of the multicast channel of this user institute program request, and user is joined in this multicast group newly increased.
Step S507: interface board asks the multicast data flow of multicast channel to this user of master control borad request.
Step S508: master control borad judges that whether the multicast data flow of asking is at master control borad, if so, performs step S509; Otherwise, perform step S510.
After master control borad receives the multicast data flow request of interface board transmission, the multicast data flow of asking is judged whether on master control borad according to the multicast group information of the multicast maintenance of described master control borad multicast processing unit record, if the multicast group information of the multicast maintenance recorded indicates the multicast group that current master control borad exists described asked multicast data flow, then asked multicast data flow is on master control borad, otherwise the multicast data flow of asking is not on master control borad.
If the multicast channel that this user asks by step S501 statistics obtain conventional channel, the multicast data flow of the multicast channel so necessarily having this user to ask in master control borad.
Step S509: this interface board is joined multicast group by master control borad in multicast forward table, jumps to step S513.
The interface board that this submission IGMP asks is added in the multicast group corresponding to this multicast channel in master control borad multicast forward table.
Step S510: generate multicast group in master control borad multicast forward table.
Master control borad, in master control borad multicast forward table, increases the multicast group of this user's demanding channel, and is joined in this multicast group by this interface board.
Step S511: master control borad is to network side request multicast data flow data.
Step S512: master control borad receives the multicast data flow that network issues.
Step S513: master control borad sends multicast data flow to interface board.
Step S514: interface board sends multicast data flow according to the multicast table in interface board multicast forward table to user.
Above-mentioned steps S511 to step S514 respectively with the step S409 in embodiment 1 to step S412 in like manner, therefore not to repeat here.
As from the foregoing, due to relative embodiment 1 for access device inside multicast process have employed the pattern of multicast distributed treatment, the multicast process of access device is distributed to interface board and master control borad associated treatment.Owing to have employed this multicast distributed treatment, when interface board exist multiple user add same program source time, it is just passable that master control borad only needs process first to ask, and do not need reprocessing, use the inventive method can make full use of the disposal ability of system, greatly promote the multicast disposal ability of access device.
In addition, owing to adopting the pattern of this multicast distributed treatment, multicast forward table on interface board is configured according to the user IGMP message received voluntarily by interface board, instead of is distributed to each interface board by master control borad again according to the user IGMP message generation of interface board forwarding or transparent transmission; Master control borad only needs the IGMP message forwarded to master control borad according to interface board, is configured the multicast forward table of self.Visible employing the inventive method, saves the communication of access device inside, is conducive to improving processing speed.
In addition, if the multicast channel of user's request is not the channel that the program request frequency in this interface board is higher, but, for conventional channel, so user IGMP request is submitted to master control borad by interface board, after only needing to arrive master control borad process, just the user port of asked user can be pushed to by interface board, and do not need to add to network side request multicast, reduce multicast processing delay, improve multicast treatment effeciency.
Embodiment 3:
Employ in example 2 and commonly use channel in access device internal statistical, and added up conventional channel is pushed to the intelligent decision scheme in corresponding interface board.By the extension of the method for embodiment 2, the program is applied in the multicast process of access network, specific as follows:
In the inside of access network, add according to the user in each interface board in every access device and leave the time point of each multicast channel, collect the play-on-demand program frequency in the every interface board of statistics and Annual distribution, and the conventional channel obtained in access network is analyzed in the further tabulate statistics of statistics in the total interface plate in all access devices, and this user commonly use the weights of multicast channel program request frequency or frequency higher or service time longer access device.Its statistical method as the step S501 in embodiment 2 in like manner.
Then, according to statistics, notify that this user commonly uses that the master control borad multicast replication unit of the higher access device of the program request frequency at multicast channel place fixes by this several the most frequently used multicast channel, initiatively add to network side request, the multicast data flow this user being commonly used multicast channel by network side is issued to the master control borad using this user to commonly use multicast channel frequency or frequency weight is higher or service time is longer access device.
For the multicast processing method of access device inside, both can adopt the method in embodiment 1, the method in embodiment 2 can also have been adopted.
The present embodiment, owing to having introduced intelligent decision scheme in access network, net control has set up pre-add tree, improves the treatment effeciency of whole network.
What deserves to be explained is, in the present embodiment, obtaining the conventional channel in access network, and use after this user commonly uses the highest access device of multicast channel frequency, can also according to this statistics, set up the table of comparisons at network side, make each conventional channel corresponding with the access device using this user to commonly use multicast channel frequency the highest respectively.Network side, according to this table of comparisons, initiatively pushes to access device the multicast data flow that this user commonly uses multicast channel.Adopt the technical program, further can reduce the processing procedure that multicast request adds, further reduce multicast processing delay, improve multicast treatment effeciency.
Embodiment 4:
Fig. 6 is the structural representation of the access device in the multicast treatment system of the present embodiment, as Fig. 6 shows, this access device 60 comprises interface board 310 and master control borad 300 and intelligent decision equipment 320, this access device is relative to the difference of the access device (as shown in Figure 3) of prior art, adds intelligent decision equipment 320 in access device inside.
Intelligent decision equipment 320, be connected with master control borad multicast processing unit 301, for the multicast group information that records multicast maintenance according to master control borad multicast processing unit 301 and the user multicast behavior of recording, in every interface board, user adds and leaves the time point of each multicast channel, the Annual distribution of the program request frequency of multicast channel in the every interface board of collection statistics or the weights of the weights of frequency and frequency or frequency, and this statistics is added up further, obtain certain relatively long-time in each time period channel in the distribution of access device, the weights obtaining access device 60 certain relatively long-time interior program request frequency inherent or frequency are the highest, or Annual distribution widest in area several program frequencies commonly use multicast channel as user.The bandwidth of weight factor specifically shared by frequency of the weights of its medium frequency is arranged.Less weight factor is got for the channel that occupied bandwidth is larger, larger weight factor is got for the channel that occupied bandwidth is less, make to consider in conjunction with the distribution of bandwidth resources for the process for conventional multicast channel, more rationally.
After intelligent decision equipment 320 gets this conventional multicast channel, by instruction master control borad multicast processing unit 301, master control borad multicast forward table 302 is indicated by master control borad multicast processing unit 301, multicast group is set up for this user commonly uses multicast channel, master control borad multicast replication unit 303 is according to the multicast group of the conventional channel in master control borad multicast forward table 302, fixing adds to network side request, network is fixed and issues to master control borad 300 multicast data flow that this user commonly uses multicast channel.
Interface board 310 comprises:
Interface board multicast forward table 311, is connected respectively with master control borad multicast processing unit 301, interface board multicast replication unit 312, controls by master control borad multicast processing unit 301, for the multicast group of user corresponding to each multicast channel current in record interface plate.
Interface board multicast replication unit 312, be connected with interface board multicast forward table 311, master control borad multicast replication unit 303 respectively, for noting down according to the multicast group in interface board multicast forward table 311, from the master control borad multicast replication unit 303 of master control borad 300, duplicated multicast stream, and by copied multicast data flow copying to user port corresponding to each user in multicast group.
Master control borad 300 comprises:
Master control borad multicast processing unit 301, is connected respectively with master control borad multicast forward table 302, interface board multicast forward table 311 and intelligent decision equipment 320, for the user IGMP message that receiving interface plate 310 forwards, and carries out multicast process according to IGMP message.This processing procedure is specific as follows:
When received IGMP message for user asks on-demand multicasting channel, so multicast group information for multicast maintenance of recording according to this unit of master control borad of master control borad multicast processing unit 301, judge multicast data flow that this user asks whether on master control borad 300, if the multicast data flow that this user asks is on master control borad 300, master control borad multicast processing unit 301 indicates master control borad multicast forward table 302, the interface board 310 of this submission IGMP message is joined in the multicast group corresponding to this multicast channel, this interface board 310 is joined after in this multicast group, the multicast data flow of this multicast channel just can copy on this interface board 310 according to master control borad multicast forward table 302 by master control borad multicast replication unit 303, if the multicast data flow of this user request is not on master control borad 300, master control borad multicast processing unit 301 adds to network side request, and request issues multicast data flow.
Simultaneously, master control borad multicast processing unit 301 generates the multicast group of this multicast data flow respective user port, and this multicast group is joined in the interface board multicast forward table 311 of the interface board 310 receiving this user request
Master control borad multicast forward table 302: be connected respectively with master control borad multicast processing unit 301 and master control borad multicast replication unit 303, controls by master control borad multicast processing unit 301, for recording interface board multicast group corresponding to multicast channel.
Master control borad multicast replication unit 303, be connected respectively with master control borad multicast forward table 302 and network side, for according to the multicast group record in master control borad multicast forward table 302, receive the multicast data flow issued from network side, and this multicast data flow is copied to the corresponding each interface board in multicast group.
Therefore, owing to having newly increased intelligent decision equipment 320 in access device 60, if the multicast channel of user's request is conventional channel, so the multicast data flow of this multicast channel is certainly on master control borad 300, and user IGMP request is committed to master control borad 300, after only needing to be processed by master control borad 300, just the user port of asked user can be pushed to by interface board 310, and do not need to add to network side request multicast, reduce multicast processing delay, improve multicast treatment effeciency.
Embodiment 5:
Fig. 7 is the system configuration schematic diagram of the access device of the multicast treatment system of the present embodiment, as diagram, this access device 70 comprises intelligent decision equipment 330, interface board 314 and master control borad 305, this access device 70 relative to access device 60 difference in embodiment 4 is as shown in Figure 6, further increases interface board multicast processing unit 313 in the interface board 314 of access device 70 in the present embodiment.
Intelligent decision equipment 330, be connected respectively with interface board processing unit 313, master control borad multicast processing unit 304 respectively, owing to introducing interface board multicast processing unit 313 in this access device 30, therefore intelligent decision equipment 330 in the present embodiment, only need the user multicast behavior of recording according to interface board multicast processing unit 313, the user that statistics obtains in access device commonly uses multicast channel, and described in this statistical method and embodiment 4, method in like manner.
Further, several program frequencies that this intelligent decision equipment 330 acquires access device 70 certain relatively long-time interior program request frequency inherent the highest except statistics are commonly used except multicast channel as user, further obtain and use this user to commonly use the higher concrete each interface board 314 of multicast channel frequency.And intelligent decision equipment 330 indicates master control borad multicast processing unit 304, master control borad multicast forward table 302 is indicated by master control borad multicast processing unit 304, set up multicast group for this user commonly uses multicast channel, make each conventional channel corresponding with the concrete each interface board 314 using this user to commonly use multicast channel frequency higher respectively.When making master control borad 300 receive the multicast data flow of this conventional frequency that network issues, master control borad multicast replication unit 303 commonly uses the multicast group of multicast channel according to this user, the weights that the multicast data flow automatically this user being commonly used multicast channel commonly uses multicast channel frequency or frequency to this user of use are higher, or, use this user to commonly use time of multicast channel longer physical interface plate 314 and push.
Interface board 314 comprises:
Interface board multicast processing unit 313, with the interface board multicast forward table 311 in this interface board 314, and master control borad multicast processing unit 304, intelligent decision equipment 330 are connected respectively, and the IGMP message for sending according to user carries out corresponding multicast process.Such as:
When interface board 314 receives the IGMP message for on-demand multicasting channel of user's transmission, the multicast maintenance multicast group that this unit records judges multicast data flow that user asks whether on interface board, if the multicast data flow that this user asks is on interface board 314, interface board multicast processing unit 313 indicates the multicast group of interface board multicast forward table 311 corresponding to this multicast channel, and indicate interface board multicast replication unit 312 according to the multicast group in interface board multicast forward table 311 corresponding to multicast channel, the multicast data flow of this multicast channel is copied to user port; If the multicast data flow that this user asks is not on interface board 314, so interface board multicast processing unit 313 indicates interface board multicast forward table 311 to increase the multicast group of this multicast channel, and this user IGMP message repeating to master control borad multicast disposable plates 301, asks this user to ask the multicast data flow of the multicast channel added to master control borad multicast disposable plates 301 by interface board multicast processing unit 313.
Interface board multicast forward table 311, is connected with interface board multicast processing unit 313, interface board multicast replication unit 312 respectively, controls by interface board multicast processing unit 313, for recording the multicast group of user corresponding to multicast channel.
Interface board multicast replication unit 312, identical with embodiment 4 of the annexation of this unit and function.
Master control borad 305 and embodiment 4 differences are master control borad multicast processing unit 304, in the present embodiment, master control borad multicast processing unit 304 is connected respectively with master control borad multicast forward table 302, interface board multicast processing unit 313 and intelligent decision equipment 330, for the multicast data flow request that receiving interface plate multicast processing unit 313 sends, and carry out multicast process according to request.
As seen from the above description, owing to adding interface board multicast processing unit 313 at every interface board of access device, original all multicast process are concentrated on the process of master control borad, be distributed to each interface board and master control borad associated treatment.Owing to have employed this multicast distributed treatment, when interface board exist multiple user add same program source time, it is just passable that master control borad only needs process first to ask, and do not need reprocessing, use the inventive method can make full use of the disposal ability of system, greatly promote the multicast disposal ability of access device.
Further, owing to adopting the pattern of this multicast distributed treatment, multicast forward table on interface board is configured according to the user IGMP message received voluntarily by interface board, instead of the user IGMP message forwarded according to interface board by master control borad generates, then is distributed to each interface board; Master control borad only needs the IGMP message forwarded to master control borad according to interface board, is configured the multicast forward table of self.Visible employing the inventive method, saves the communication of access device inside, is conducive to improving processing speed.
Further, if the multicast channel of user's request is the channel that the program request frequency in this interface board 314 is higher, but, after so user IGMP asks to arrive interface board 314, just the user port of asked user directly can be pushed to by interface board 314, and do not need upwards to submit to master control borad 305 to process, further reduce multicast processing delay, greatly improve multicast treatment effeciency.
Embodiment 6:
Fig. 8 is the multicast treatment system structural representation of the present embodiment, as diagram, intelligent decision equipment 340 is applied to whole access network by the present embodiment, each access device in intelligent decision equipment 340 access network 80 800 (both can be the access device 102 shown in Fig. 3 at this this access device 800, it can also be the access device 60 shown in Fig. 6, can also be the access device 70 shown in Fig. 7) be connected respectively, the annexation of intelligent decision equipment 340 and each access device 800 specifically, be connected respectively with the master control borad multicast processing unit 301 of each access device 102.For passing through instruction master control borad multicast processing unit 301, according to the user multicast behavior that each interface board multicast processing unit be connected with master control borad multicast processing unit records, in statistics master control borad, every interface board adds and leaves the time point of each multicast channel, add up user's program request frequency of each multicast channel in every access device or the weights of frequency, and the Annual distribution of the weights of frequency or frequency, result is added up, obtain weights service time that is the highest or frequency of all access devices 800 program request frequency or the frequency within certain considerable time in access network 80 the longest several program frequencies and commonly use multicast channel as user, and choosing this user further, to commonly use the weights of multicast channel program request frequency or frequency in corresponding access device 800 higher, or use this user to commonly use time of multicast channel the longest concrete access device commonly uses multicast channel access device as this user conventional.
Intelligent decision equipment 340 is according to above-mentioned obtained result, the conventional channel of foundation and this this user conventional commonly use the table of comparisons of the access device 800 of multicast channel, and according to the table of comparisons, indicate the master control borad multicast processing unit 301 of the common equipment 102 in the table of comparisons initiatively to send to network side in the notice table of comparisons and add application, ask the multicast data flow of the conventional channel that program request frequency in this access device 800 is higher.
Therefore by whole access net system, add intelligent decision equipment 340, intelligent decision equipment 340 makes the access device 800 in access network 80 can obtain multicast data flow corresponding to the higher conventional channel of this equipment use frequency in advance.Be conducive to the multicast treatment effeciency improving multicast process network.
Embodiment 7:
Fig. 9 is the structural representation of the multicast treatment system of the present embodiment, and as diagram, the present embodiment and embodiment 6 differences are, the intelligent decision equipment 350 be connected respectively with each access device 800 in access network 90 is also connected with IP metropolitan area network 107.Further getting after access network commonly uses multicast channel and use access device that this conventional multicast channel frequency is higher, in IP metropolitan area network 107, setting up conventional channel commonly using multicast channel frequency higher access device 800 table of comparisons with using this user, make IP metropolitan area network 107 on one's own initiative according to this table of comparisons, push the multicast data flow of corresponding multicast channel to the access device 800 in the table of comparisons.
Therefore, because the present embodiment employs the multicast data flow that IP metropolitan area network 107 active push issues the program frequencies that connecting system is commonly used, further decrease the time delay of multicast request process, further increase multicast treatment effeciency.
Above detailed introduction is done to a kind of multicast processing method provided by the present invention and system, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a multicast processing method, comprising:
Obtain user and commonly use multicast channel, it is that the weights of program request frequency or the described frequency received by each interface board in access device are high that described user commonly uses multicast channel, or the channel that the Annual distribution scope of the weights of program request frequency or described frequency is wide commonly uses multicast channel as the user in described access device;
Obtain the multicast data flow that described user commonly uses multicast channel, wherein said multicast data flow is obtained to network side request by the master control borad of described access device;
Receive user's request, according to described request, wherein said master control borad judges that whether the multicast data flow of asking is at master control borad, if not, then described master control borad is to the multicast data flow described in network side request, otherwise, user's request add for described conventional multicast channel, the master control borad of described access device adds interface board from the user place of described conventional multicast channel to described request sends the multicast data flow of the conventional multicast channel of asking.
2. multicast processing method according to claim 1, is characterized in that, described acquisition user commonly uses multicast channel and specifically comprises the following steps:
According to the multicast behavior of each user in the every interface board in described access device, obtain the program request frequency of the channel in every interface board or the weights of described frequency, and the Annual distribution of the weights of described frequency or described frequency, the weight of the weights of wherein said frequency is specifically chosen according to the bandwidth of described channel;
Add up the Annual distribution of the weights of the program request frequency of the channel in the total interface plate of described access device or the weights of described frequency and described frequency or described frequency;
The weights choosing described frequency or described frequency according to described statistical value are high, or the channel that the Annual distribution scope of the weights of program request frequency or described frequency is wide commonly uses multicast channel as the user in described access device.
3. multicast processing method according to claim 2, is characterized in that, the multicast behavior of each user in described every interface board specifically obtains according to the multicast group information of the multicast maintenance of master control borad multicast processing unit record.
4. multicast processing method according to claim 1, it is characterized in that, the master control borad of described access device adds interface board from the user place of described conventional multicast channel to described request sends the multicast data flow of the conventional multicast channel of asking, and specifically comprises the following steps:
This interface board is joined multicast group by described master control borad in multicast forward table, in described master control borad multicast forward table, generate multicast group.
5., according to one of any described multicast processing method of Claims 1-4, it is characterized in that, described method is further comprising the steps:
Described interface board receives user and joins request;
According to the multicast group information of the multicast maintenance of described interface board record, judge that whether multicast data flow that described user asks is at described interface board, if not, then to the multicast data flow described in described master control borad request, otherwise,
Described interface board according to described in join request, push described multicast data flow to described user.
6. multicast processing method according to claim 2, is characterized in that, the multicast behavior of each user in described every interface board specifically obtains according to the multicast group information of the multicast maintenance of interface board multicast processing unit record.
7. an access device, described access device comprises interface board 310 and master control borad 300, it is characterized in that, described access device also comprises intelligent decision equipment 330;
Described intelligent decision equipment 330 is connected with described master control borad 300 with described interface board 310 respectively, multicast channel is commonly used for obtaining user, it is that the weights of program request frequency or the described frequency received by each interface board in access device are high that described user commonly uses multicast channel, or the channel that the Annual distribution scope of the weights of program request frequency or described frequency is wide commonly uses multicast channel as the user in described access device;
Described master control borad is for receiving user's request and carrying out following multicast process according to described user request: judge that whether multicast data flow that described user asks is at master control borad, if not, then described master control borad is to the multicast data flow described in network side request, otherwise, user's request add for described conventional multicast channel, described master control borad adds interface board from the user place of described conventional multicast channel to described request sends the multicast data flow of the conventional multicast channel of asking.
8. access device according to claim 7, it is characterized in that, described intelligent decision equipment 330 is according to the multicast behavior of each user in described interface board 310, obtain the program request frequency of the channel in described interface board 310 or the weights of described frequency, and the Annual distribution of the weights of described frequency or described frequency, the weight of the weights of wherein said frequency is specifically chosen according to the bandwidth of described channel;
Add up the Annual distribution of the weights of the program request frequency of the channel in described interface board 310 or the weights of described frequency and described frequency or described frequency;
The weights choosing described frequency or described frequency according to described statistical value are high, or the channel that the Annual distribution scope of the weights of program request frequency or described frequency is wide commonly uses multicast channel as the user in described access device.
9. access device according to claim 7, is characterized in that, described interface board 310 comprises interface board multicast forward table 311 and interface board multicast replication unit 312; Master control borad 300 comprises master control borad multicast processing unit 301, master control borad multicast forward table 302 and master control borad multicast replication unit 303;
Described interface board multicast forward table 311, be connected respectively with described master control borad multicast processing unit 301, described interface board multicast replication unit 312, control by described master control borad multicast processing unit 301, for recording the multicast group of the user that current each multicast channel is corresponding in described interface board 310;
Described interface board multicast replication unit 312, be connected with described master control borad multicast replication unit 303, for noting down according to the multicast group in described interface board multicast forward table 311, from described master control borad multicast replication unit 303 duplicated multicast stream, and by copied multicast data flow copying to user port corresponding to each user in multicast group;
Described master control borad multicast processing unit 301, be connected respectively with described master control borad multicast forward table 302, described interface board multicast forward table 311 and described intelligent decision equipment 320, for receiving the user IGMP message that described interface board 310 forwards, and carry out multicast process according to IGMP message;
Described master control borad multicast forward table 302: be connected with described master control borad multicast replication unit 303, controls by described master control borad multicast processing unit 301, for recording interface board multicast group corresponding to multicast channel;
Described master control borad multicast replication unit 303, be connected with described master control borad multicast forward table 302, for according to the multicast group record in described master control borad multicast forward table 302, receive the multicast data flow issued from network side, and this multicast data flow is copied to described interface board 310.
10. access device according to claim 9, it is characterized in that, described interface board 310 also comprises described interface board multicast processing unit 313, described interface board multicast processing unit 313 is connected respectively with described interface board multicast forward table 311, described master control borad multicast processing unit 304, described intelligent decision equipment 330, and the IGMP message for sending according to user carries out corresponding multicast process.
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| 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 |
| CN1764163A (en) * | 2005-11-07 | 2006-04-26 | 杭州华为三康技术有限公司 | Intelligent transmitting method and system for multicast message |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN1764163A (en) * | 2005-11-07 | 2006-04-26 | 杭州华为三康技术有限公司 | Intelligent transmitting method and system for multicast message |
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