CN107566134A - A kind of multicast packet method for stream processing, apparatus and system - Google Patents
A kind of multicast packet method for stream processing, apparatus and system Download PDFInfo
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- CN107566134A CN107566134A CN201610514817.XA CN201610514817A CN107566134A CN 107566134 A CN107566134 A CN 107566134A CN 201610514817 A CN201610514817 A CN 201610514817A CN 107566134 A CN107566134 A CN 107566134A
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Abstract
The invention provides a kind of multicast packet method for stream processing, apparatus and system, wherein, this method includes：Multicast router receives the request message for the addition multicast group that multi-cast terminal is sent, obtain the residual available bandwidth of the multi-cast terminal, when the residual available bandwidth is less than the bandwidth of multicast group, query message is sent to all multi-cast terminals under multicast router corresponding ports；According to response message situation, termination is sent to untapped multicast group data stream.Solve the problems, such as that the abnormal multi-cast terminal of correlation technique processing leaves multicast group and causes to postpone and need to preset multicast router.The present invention realizes that step is simple, a variety of multi-cast terminal abnormal problems can be handled in real time, and router need not be preset or enable other extra resources, solves the problems, such as correlation technique variation such as caused delay when handling abnormal multi-cast terminal and leaving multicast group, network bandwidth has been effectively saved, has provided the user and has preferably watched multicast experience.
Description
Technical field
The present invention relates to Web TV (IPTV) field, more particularly, to a kind of multicast packet method for stream processing, device and
System.
Background technology
With the continuous development of Internet technology, many network applications produce therewith, wherein be no lack of to network bandwidth have compared with
The multimedia application of high demand, for example network teleconference, quotations on the stock market issue, multimedia remote education etc., this just brings
A series of problems, such as bandwidth consumption and network congestion.In order to solve the above problems, it has been proposed that various solutions, one of which
It is exactly to utilize multicasting technology to use existing bandwidth to greatest extent.
Multicast, multicast (multicast) is also cried, be that one kind realizes that point-to-point configuration connects between the sender and the recipient
The technology connect.If a sender transmits identical data to multiple recipients simultaneously, only needed when by router multiple
A identical data packet is made, this provides for improved data-transmission efficiency, reduces backbone network and the probability of congestion occurs.Network
The most basic business of TV (IPTV) is exactly live, and the live main mode for using multicast is to reduce the pressure to backbone network
Power.
At present, the message for adding multicast group is sent when multi-cast terminal plays group broadcasting program to multicast router.Work as multicast
When terminal stops playing group broadcasting program, in addition to only supporting IGMP V1 multi-cast terminal, IGMP V2 and above version are supported
Multi-cast terminal, which can all be sent, leaves the message of multicast group to multicast router.Multicast router can timing transmission igmp querying report
Text, after multi-cast terminal receives query message, this query message can be responded within the defined time, to show depositing for multi-cast terminal
It is living.
IGMP agreements are unlike Transmission Control Protocol, and without retransmission mechanism, therefore it is insecure.It is when multi-cast terminal because normal
Leave original channel, switching channels or the reason such as unexpected power-off restarting and program request new channel and leave former multicast group, the multi-cast terminal
Do not send in time and leave the message of original channel, although or have sent and leave message, because congestion occurs for network, cause from
When opening message dropping, the multi-cast terminal still may proceed to receive the information flow for leaving preceding place channel, so as to cause a large amount of bands
The waste of wide resource.
Therefore, for multicast router, it is to ensure that set top box plays matter fast and effeciently to handle abnormal multi-cast terminal
An important factor for amount.
The method that existing processing multi-cast terminal leaves multicast group has following a few classes：
Scheme one, multi-cast terminal voluntarily exit certain multicast group, and multicast router sends " membership qualification to All hosts timing
Inquiry ", the program request situation of active inquiry multi-cast terminal, if multi-cast terminal does not respond to, stop turning for multicast group data stream
Hair.The program carrys out aging abnormal terminals by timing inquiry, and this will cause the delay of certain time.Just because this postpones, multicast is whole
End subscriber may receive two parts of multicast packets simultaneously, so as to cause the flower screen or mosaic that occur by bandwidth deficiency, influence
The viewing experience of user.
Scheme two, multi-cast terminal leave certain multicast group, are actively sent to multicast router and leave message, multicast router is received
Special inquiry message is sent to the multi-cast terminal after to message, if multi-cast terminal does not respond to, is stopped immediately whole to multicast
End sends the data flow of the multicast group.But the program, which needs multi-cast terminal actively to send, leaves message, therefore group is not suitable for it
Broadcast the situation of terminal abnormal power down.
Scheme three, the information for once adding multicast is preserved in multi-cast terminal side, send and leave when user starts shooting next time
The message of multicast group.This method is primarily adapted for use in the situation of multi-cast terminal power-down rebooting, and needs to carry out in advance multicast router
First set.
Scheme four, multi-cast terminal is by detecting the multicast traffic stream for finding to receive oneself non-program request, then to Multicast Routing
Device is sent and leaves message, and notice multicast router is terminated to oneself sending the multicast group data stream.The program needs multi-cast terminal
Detect in real time and judge the multicast traffic stream of oneself non-program request, process is more complicated, and can produce certain time delay；In addition in reality
In, multi-cast terminal often receives the multicast data flow for flooding to come on a small quantity, so as to cause multi-cast terminal continually to detect, send
Leave message.
The problem of for postponing caused by such scheme or needing to pre-set multicast router, prior art is not yet
It is proposed effective solution.
The content of the invention
The generation scene of abnormal multi-cast terminal mainly has following three class：
1st, multi-cast terminal does not have to send the message for leaving previous multicast group in time in switching channels, new with regard to program request
Channel, the multi-cast terminal still can receive the data flow of former multicast channel；
2nd, multi-cast terminal switching channels or normally leave former multicast group channel and have sent multicast and leave message, but due to net
The reasons such as network congestion, this leaves message and does not reach multicast router in time, then the multi-cast terminal still can receive former multicast frequency
The data flow in road；
3rd, the new channel of the unexpected power-off restarting of multi-cast terminal and program request, and could not in time send and leave message, the then group
Broadcasting terminal still can receive the data flow of former multicast channel.
The present invention proposes a kind of multicast packet method for stream processing, apparatus and system, to realize that abnormal multi-cast terminal can
On the basis of leaving multicast group, further solve the problems, such as that what prior art was derived when handling multicast terminal abnormal prolongs
The problem of late or needing to pre-set multicast router.
To solve the above problems, technical scheme realization is as follows：
A kind of multicast packet method for stream processing, including following processing step：
Multicast router receives the request message for the addition multicast group that multi-cast terminal is sent；
The multicast router obtains the residual available bandwidth of the multi-cast terminal, when the residual available bandwidth is less than institute
When stating the bandwidth for the multicast group that multi-cast terminal request adds, the institute under multicast router corresponding ports where to the multi-cast terminal
There is multi-cast terminal to send query message, wherein, all multi-cast terminals that the query message is used to inquire about under the port have added
The multi-cast terminal whether one or more multicast groups entered are added into the multicast group is used；
The multicast router receives the response message of one or more multi-cast terminals in the given time, according to the sound
Message is answered to determine not sending the untapped multicast group of multi-cast terminal of the response message and/or send the group of the response message
The untapped multicast group of terminal is broadcast, terminates to the multi-cast terminal for not sending the response message and/or sends the response message
Multi-cast terminal send the data flow of the untapped multicast group of the multi-cast terminal.
Further, the response message carry the Mac address informations of the multi-cast terminal for sending the response message with
And the identification information of multicast group used in the multi-cast terminal.
Further, the step of residual available bandwidth of the multicast router acquisition multi-cast terminal includes：
The maximum available bandwidth of multicast router corresponding ports where the multicast router detects the multi-cast terminal with
The bandwidth used；
The multicast router obtains the multi-cast terminal according to the maximum available bandwidth and the bandwidth used
Residual available bandwidth.
Preferably, terminating to the multi-cast terminal for not sending the response message and/or sending the group of the response message
After broadcasting the data flow that terminal sends the untapped multicast group of the multi-cast terminal, the multicast packet method for stream processing also includes：
The multicast router judges whether the residual available bandwidth of the multi-cast terminal is less than and sends the request message
Multi-cast terminal request add multicast group bandwidth；
The multicast router is sent in the case where judged result is no to the multi-cast terminal for sending the request message
The data flow for the multicast group that multi-cast terminal request adds.
Further, in the multicast packet method for stream processing, multicast router corresponding ports where the multi-cast terminal
Maximum available bandwidth be the multicast router corresponding ports maximum downstream build connection speed or operator be the multicast
The bandwidth that router corresponding ports are configured.
The invention also discloses a kind of multicast packet current processing device applied to multicast router, it is characterised in that bag
Include：
Receiving module, for receive multi-cast terminal transmission addition multicast group request message and connect in the given time
Receive the response message that one or more multi-cast terminals are sent；
Acquisition module, for obtaining the residual available bandwidth for the multi-cast terminal for sending the request message；
Enquiry module, the multi-cast terminal for being less than the transmission request message when the residual available bandwidth ask to add
Multicast group bandwidth when, all groups under multicast router corresponding ports where to the multi-cast terminal for sending the request message
Broadcast terminal and send query message, wherein, all multi-cast terminals that the query message is used to inquire about under the port are added
The multi-cast terminal whether one or more multicast groups are added into the multicast group is used；
Processing module, for determining that the multi-cast terminal for not sending the response message is untapped according to the response message
Multicast group and/or the untapped multicast group of multi-cast terminal for sending the response message, terminate to not sending the response message
Multi-cast terminal and/or send the multi-cast terminal of the response message and send the data of the untapped multicast group of the multi-cast terminal
Stream.
Further, the acquisition module includes：
Detection unit, multicast router corresponding ports where the multi-cast terminal of the request message is sent for detecting are most
Available bandwidth and the bandwidth used；
Computing unit, reported for sending the request with the bandwidth calculation used according to the maximum available bandwidth
The residual available bandwidth of the multi-cast terminal of text.
Preferably, the multicast packet current processing device also includes：
Judge module, for judge to send the residual available bandwidth of multi-cast terminal of the request message whether be less than it is described
The bandwidth for the multicast group that multi-cast terminal request adds；
Sending module, in the case of being no in judged result, sent to the multi-cast terminal for sending the request message
The data flow for the multicast group that multi-cast terminal request adds.
The invention also discloses a kind of multicast packet stream processing system, it is characterised in that including：
Multicast router, the request message of the addition multicast group for receiving multi-cast terminal transmission；It is whole to obtain the multicast
The residual available bandwidth at end, when the residual available bandwidth is less than the bandwidth for the multicast group that multi-cast terminal request adds,
All multi-cast terminals under multicast router corresponding ports where to the multi-cast terminal send query message, wherein, it is described to look into
Ask whether the added one or more multicast groups of all multi-cast terminals that message is used to inquire about under the port are added into the group
The multi-cast terminal for broadcasting group is used；The response message of one or more multi-cast terminals is received in the given time, according to the sound
Message is answered to determine not sending the untapped multicast group of multi-cast terminal of the response message and/or send the group of the response message
The untapped multicast group of terminal is broadcast, terminates to the multi-cast terminal for not sending the response message and/or sends the response message
Multi-cast terminal send the data flow of the untapped multicast group of the multi-cast terminal；
Multi-cast terminal, the request message of multicast group is added for being sent to multicast router；Receiving multicast router
After the query message sent, the response message is sent to multicast router.
The embodiment of the present invention, by when multicast router receives the request message that multi-cast terminal is sent, judging the multicast
The residual available bandwidth of terminal, once finding bandwidth deficiency, then abnormal multi-cast terminal is handled immediately, user will not be because of band
Width is insufficient and produces the sensation of interim card.The present invention realizes that step is simple, can handle a variety of multi-cast terminal abnormal problems in real time, and
Router need not be preset or enable other extra resources, correlation technique is solved and leave group in the abnormal multi-cast terminal of processing
Caused delay during the problem of broadcasting group, need to preset the variations such as router, be effectively saved network bandwidth, be
User provides the experience for preferably watching multicast channel.
Brief description of the drawings
Fig. 1 is a kind of multicast traffic stream process chart according to embodiments of the present invention；
Fig. 2 is a kind of multicast packet current processing device block diagram one according to the embodiment of the present invention；
Fig. 3 is a kind of multicast packet current processing device block diagram two according to the embodiment of the present invention；
Fig. 4 is a kind of multicast packet current processing device block diagram three according to the embodiment of the present invention；
Fig. 5 is a kind of multicast packet stream processing system block diagram according to the embodiment of the present invention.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
Embodiment one
The embodiments of the invention provide a kind of multicast packet method for stream processing, receives multi-cast terminal in multicast router and sends
Request message when, judge the residual available bandwidth of the multi-cast terminal, once find bandwidth deficiency, then it is whole to abnormal multicast immediately
End is handled.Fig. 1 is a kind of multicast traffic stream process chart according to embodiments of the present invention, as shown in figure 1, the multicast number
Include following processing step according to method for stream processing：
Step S102, multicast router receive the request message for the addition multicast group that multi-cast terminal is sent；
Step S104, multicast router obtain the residual available bandwidth of the multi-cast terminal, are somebody's turn to do when residual available bandwidth is less than
During the bandwidth for the multicast group that multi-cast terminal request adds, all multicasts under multicast router corresponding ports where to multi-cast terminal
Terminal sends query message, wherein, the query message is used for added one of all multi-cast terminals inquired about under the port
Or whether multiple multicast groups are added into the multi-cast terminal of the multicast group and are used；
One or more multi-cast terminals may be connected under the port of multicast router, each multi-cast terminal again may program request
Multiple multicast channels.Multicast router can send query message according to the quantity of multi-cast terminal, such as, 3 are connected under A ports
Terminal, each terminal add 3 multicast groups, and multicast router one, which is met together, sends 3 query messages, i.e., whole to each multicast
Hold one query message of each transmission；Multicast router can also combine the program request situation of multicast group and the quantity of multi-cast terminal is sent
Query message, such as, 3 terminals are connected under A ports, each terminal adds 3 multicast groups, and multicast router one meets hair together
Raw 9 query messages, i.e., 3 query messages of the multicast group for its addition are sent to each multi-cast terminal.
Wherein, multicast router is by carrying out monitoring in real time to the bandwidth of each multicast channel or being matched somebody with somebody in advance by operator
The bandwidth value of each multicast channel is put, to determine the bandwidth of the multicast group of multi-cast terminal request addition.
If in addition, band of the residual available bandwidth of multi-cast terminal not less than the multicast group that multi-cast terminal request adds
Width, then multicast router will directly to the multi-cast terminal send its request add multicast group data flow.
Step S106, multicast router receive the response message of one or more multi-cast terminals, foundation in the given time
The response message determines not sending the untapped multicast group of multi-cast terminal of response message and/or sends the multicast end of response message
Untapped multicast group is held, is terminated to the multi-cast terminal for not sending response message and/or the multi-cast terminal hair for sending response message
Give the data flow of the untapped multicast group of the multi-cast terminal.
The response message that multi-cast terminal is sent can have following two forms, and in the case of the first, multi-cast terminal can be directed to
Its each multicast group being used respectively sends a bar response message, such as, I terminal is connected under A ports, the terminal adds
3 multicast groups, but its multicast group being used only has 2, and 2 multicast groups that I terminal can be used with regard to it send 2 respectively
Bar response message；In the case of second, multi-cast terminal can be directed to its all multicast group being used and send a bar response message,
For example II terminal is connected under A ports, the terminal also adds 3 multicast groups, and its multicast group being used has 2, and II eventually
2 multicast groups that holding will be used with regard to it send 1 bar response message, and 2 groups are carried simultaneously in the bar response message
Broadcast the identification information of group.
The scheduled time that general acquiescence receives response message is 1 second or 2 seconds.In the given time, multicast router may
The response message of one or more multi-cast terminals can be received, now, multicast router can carry out parsing to the response message received
Match somebody with somebody, it is determined that the multi-cast terminal of the untapped multicast group of the multi-cast terminal for not sending response message and/or transmission response message does not make
Multicast group, and carry out subsequent action；Multicast router is also possible to not receive any response message, now, multicast path
By device only it needs to be determined that the multicast group of all multi-cast terminals and its addition under the port.
Further, response message carries the Mac address informations and the group for the multi-cast terminal for sending the response message
Broadcast the identification information of multicast group used in terminal.The identification information of the multicast group is Group information.Multicast router can root
Determine not sending the untapped multicast group of multi-cast terminal and/or the transmission of response message according to these information entrained by response message
The untapped multicast group of multi-cast terminal of response message.
Further, the multicast router obtains the method for the residual available bandwidth of the multi-cast terminal and included：
The maximum available bandwidth of multicast router corresponding ports is with having used where multicast router detects the multi-cast terminal
Bandwidth；The residual available bandwidth of the multi-cast terminal is obtained according to maximum available bandwidth and the bandwidth used.
When multi-cast terminal carries out multicast channel program request, multicast router which multicast channel according to multi-cast terminal program request
Draw the bandwidth value of the multicast group, and with the multicast channel of program request under multicast router corresponding ports where the multi-cast terminal
Bandwidth value is added up, when cumulative bandwidth value exceedes the maximum available bandwidth of multicast router corresponding ports, then it is assumed that should
Multi-cast terminal can not the new channel of program request again.
There are two kinds of reasons to cause the situation for above-mentioned bandwidth deficiency occur, one kind may be exactly multicast path where multi-cast terminal
By being connected to multiple terminals (such as set top box) under device corresponding ports, the different multicast channel of terminal program request simultaneously, cause port
Bandwidth deficiency；Also one kind may be exactly abnormal multicast user occurred.Therefore, multicast router needs transmission query message to enter
One step confirms, possible to distinguish above two.
Preferably, terminating to the multi-cast terminal for not sending the response message and/or sending the group of the response message
After broadcasting the data flow that terminal sends the untapped multicast group of the multi-cast terminal, the multicast packet method for stream processing also includes：Group
Broadcast router and judge whether the residual available bandwidth is less than the multicast group for the multi-cast terminal request addition for sending the request message
Bandwidth；In the case where judged result is no, sends multi-cast terminal request to the multi-cast terminal for sending the request message and add
The multicast group data flow.Ensure that the new channel of multi-cast terminal success program request.
Further, in the multicast packet method for stream processing, multicast router corresponding ports where the multi-cast terminal are most
Available bandwidth is the bandwidth that the maximum downstream of the multicast router corresponding ports builds connection speed or operator is its configuration.
It is more accurate as the maximum bandwidth of multicast router corresponding ports and flexible using connection speed is built；In contrast,
The bandwidth value configured using operator carries out accuracy in computation and the flexibility a bit deficient in of multi-cast terminal residual available bandwidth,
But operation is more convenient.
Embodiment two
The invention also discloses a kind of multicast packet current processing device applied to multicast router, Fig. 2 is according to this hair
A kind of multicast packet current processing device block diagram one of bright embodiment, as shown in Fig. 2 it is characterised in that it includes：
Receiving module 22, the request message and in the given time of the addition multicast group for receiving multi-cast terminal transmission
Receive the response message that one or more multi-cast terminals are sent；
Acquisition module 24, for obtaining the residual available bandwidth for the multi-cast terminal for sending the request message；
Enquiry module 26, for what is added when the residual available bandwidth less than the multi-cast terminal request for sending the request message
During the bandwidth of multicast group, all multicasts under multicast router corresponding ports where to the multi-cast terminal for sending the request message are whole
End sends query message, wherein, query message is used for the added one or more of all multi-cast terminals inquired about under the port
The multi-cast terminal whether multicast group is added into the multicast group is used；
Processing module 28, for determining not sending the untapped multicast of multi-cast terminal of the response message according to response message
Group and/or the untapped multicast group of multi-cast terminal for sending the response message, terminate whole to the multicast for not sending the response message
The multi-cast terminal for holding and/or sending the response message sends the data flow of the untapped multicast group of the multi-cast terminal.
Fig. 3 is a kind of multicast packet current processing device block diagram two according to the embodiment of the present invention, as shown in figure 3, the acquisition
Module 24 includes：
Detection unit 32, multicast router corresponding ports where the multi-cast terminal of the request message is sent for detecting are most
Available bandwidth and the bandwidth used；
Computing unit 34, for sending the group of the request message according to the maximum available bandwidth and the bandwidth calculation used
Broadcast the residual available bandwidth of terminal.
Fig. 4 is a kind of multicast packet current processing device block diagram three according to the embodiment of the present invention, as shown in figure 4, the multicast
Data stream processing device also includes：
Judge module 42, for judging to send whether the residual available bandwidth of multi-cast terminal of the request message is less than the group
Broadcast the bandwidth of the multicast group of terminal request addition；
Sending module 44, in the case of being no in judged result, sent to the multi-cast terminal for sending the request message
The data flow for the multicast group that multi-cast terminal request adds.
Embodiment three
The invention also discloses a kind of multicast packet stream processing system, Fig. 5 is a kind of multicast according to the embodiment of the present invention
Data flow processing system block diagram, as shown in figure 5, it is characterised in that it includes：
Multicast router 52, the request message of the addition multicast group for receiving multi-cast terminal transmission；Obtain multicast end
The residual available bandwidth at end, when the residual available bandwidth is less than the bandwidth for the multicast group that multi-cast terminal request adds, to this
All multi-cast terminals under multicast router corresponding ports where multi-cast terminal send query message, wherein, query message is used for
The multicast whether added one or more multicast groups of all multi-cast terminals inquired about under the port are added into the multicast group is whole
End is used；The response message of one or more multi-cast terminals is received in the given time, determines not send according to response message
The untapped multicast group of multi-cast terminal of the response message and/or the untapped multicast of multi-cast terminal for sending the response message
Group, terminate to the multi-cast terminal for not sending the response message and/or the multi-cast terminal for sending the response message and send multicast end
Hold the data flow of untapped multicast group；
Multi-cast terminal 54, the request message of multicast group is added for being sent to multicast router；Receiving Multicast Routing
After the query message that device is sent, response message is sent to multicast router.
The multi-cast terminal connected under the port of multicast router 52 can be one or multiple.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Any modification, equivalent substitution and improvements done within principle etc., should be included within the scope of protection of the invention.
Claims (10)
- A kind of 1. multicast packet method for stream processing, it is characterised in that including：Multicast router receives the request message for the addition multicast group that multi-cast terminal is sent；The multicast router obtains the residual available bandwidth of the multi-cast terminal, when the residual available bandwidth is less than described group When broadcasting the bandwidth of the multicast group of terminal request addition, all groups under multicast router corresponding ports where to the multi-cast terminal Broadcast terminal and send query message, wherein, all multi-cast terminals that the query message is used to inquire about under the port are added The multi-cast terminal whether one or more multicast groups are added into the multicast group is used；The multicast router receives the response message of one or more multi-cast terminals in the given time, according to the response report Text determines not sending the untapped multicast group of multi-cast terminal of the response message and/or sends the multicast end of the response message Untapped multicast group is held, terminates to the multi-cast terminal for not sending the response message and/or send the group of the response message Broadcast the data flow that terminal sends the untapped multicast group of the multi-cast terminal.
- 2. the method as described in claim 1, it is characterised in that the response message carries the group for sending the response message Broadcast terminal Mac address informations and the multi-cast terminal used in multicast group identification information.
- 3. method as claimed in claim 1 or 2, it is characterised in that the multicast router obtains the surplus of the multi-cast terminal Remaining available bandwidth includes：The maximum available bandwidth of multicast router corresponding ports is with having made where the multicast router detects the multi-cast terminal Bandwidth；The multicast router obtains the surplus of the multi-cast terminal according to the maximum available bandwidth and the bandwidth used Remaining available bandwidth.
- 4. method as claimed in claim 3, it is characterised in that terminating to the multi-cast terminal for not sending the response message And/or after the multi-cast terminal of the transmission response message sends the data flow of the untapped multicast group of the multi-cast terminal, it is described Method also includes：The multicast router judges whether the residual available bandwidth is less than the multi-cast terminal request for sending the request message The bandwidth of the multicast group of addition；The multicast router sends the group in the case where judged result is no, to the multi-cast terminal for sending the request message Broadcast the data flow of the multicast group of terminal request addition.
- 5. method as claimed in claim 4, it is characterised in that the maximum available bandwidth is the multicast router corresponding end The bandwidth that the maximum downstream of mouth builds connection speed or operator is configured by the multicast router corresponding ports.
- A kind of 6. multicast packet current processing device, applied to multicast router, it is characterised in that including：Receiving module, for the addition multicast group that receives multi-cast terminal transmission request message and receive one in the given time The response message that individual or multiple multi-cast terminals are sent；Acquisition module, for obtaining the residual available bandwidth for the multi-cast terminal for sending the request message；Enquiry module, for being less than the group for sending the multi-cast terminal request of the request message and adding when the residual available bandwidth When broadcasting the bandwidth of group, all multicasts under multicast router corresponding ports where to the multi-cast terminal for sending the request message are whole End sends query message, wherein, the query message is used for added one of all multi-cast terminals inquired about under the port Or whether multiple multicast groups are added into the multi-cast terminal of the multicast group and are used；Processing module, for determining not sending the untapped multicast of multi-cast terminal of the response message according to the response message Group and/or the untapped multicast group of multi-cast terminal for sending the response message, are terminated to the group for not sending the response message Broadcast terminal and/or send the multi-cast terminal of the response message and send the data flow of the untapped multicast group of the multi-cast terminal.
- 7. device as claimed in claim 6, it is characterised in that the response message carries the group for sending the response message Broadcast terminal Mac address informations and the multi-cast terminal used in multicast group identification information.
- 8. device as claimed in claims 6 or 7, it is characterised in that the acquisition module includes：Detection unit, the maximum of multicast router corresponding ports can where the multi-cast terminal of the request message is sent for detecting With bandwidth and the bandwidth used；Computing unit, for sending the request message according to the maximum available bandwidth and the bandwidth calculation used The residual available bandwidth of multi-cast terminal.
- 9. device as claimed in claim 8, it is characterised in that described device also includes：Judge module, for judging to send whether the residual available bandwidth of multi-cast terminal of the request message is less than multicast end The bandwidth for the multicast group that end request adds；Sending module, in the case of being no in judged result, the group is sent to the multi-cast terminal for sending the request message Broadcast the data flow of the multicast group of terminal request addition.
- A kind of 10. multicast packet stream processing system, it is characterised in that including：Multicast router, the request message of the addition multicast group for receiving multi-cast terminal transmission；Obtain the multi-cast terminal Residual available bandwidth, when the residual available bandwidth is less than the bandwidth for the multicast group that multi-cast terminal request adds, to institute All multi-cast terminals under multicast router corresponding ports where stating multi-cast terminal send query message, wherein, the inquiry report Whether the added one or more multicast groups of all multi-cast terminals that text is used to inquire about under the port are added into the multicast group Multi-cast terminal used；The response message of one or more multi-cast terminals is received in the given time, according to the response report Text determines not sending the untapped multicast group of multi-cast terminal of the response message and/or sends the multicast end of the response message Untapped multicast group is held, terminates to the multi-cast terminal for not sending the response message and/or send the group of the response message Broadcast the data flow that terminal sends the untapped multicast group of the multi-cast terminal；Multi-cast terminal, the request message of multicast group is added for being sent to multicast router；Sent receiving multicast router The query message after, send the response message to multicast router.
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