CN100563206C - A kind of multicast channel control method and device - Google Patents
A kind of multicast channel control method and device Download PDFInfo
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- CN100563206C CN100563206C CNB2006100358816A CN200610035881A CN100563206C CN 100563206 C CN100563206 C CN 100563206C CN B2006100358816 A CNB2006100358816 A CN B2006100358816A CN 200610035881 A CN200610035881 A CN 200610035881A CN 100563206 C CN100563206 C CN 100563206C
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Abstract
The invention discloses a kind of multicast channel control method and device, be applied in the multicast service access network, wherein method comprises: join message when receiving multicast channel, judge whether to allow the current business port to add the multicast channel that application adds, if, transmit the multicast channel that this application adds, otherwise, whether inquiry exists application to leave the back does not also receive response before overtime in the group-specific query response time multicast channel in the current channel of transmitting of described service port, if exist, stop forwarding the multicast channel that described application is left, and the multicast channel of forwarding this application adding, otherwise, the adding of the multicast channel of the adding that refuses an application.Adopt the present invention, under the situation that controlled single-port and multi-user inserts, also can be implemented in the switching of controlling multicast channel in the fast response time rationally and effectively, reduced the channel time delay for switching, guaranteed the quality of multicast service.
Description
Technical field
The present invention relates to data communication field, the present invention relates to a kind of multicast channel control method and device specifically.
Background technology
At present along with IP video (IP TeleVison, IPTV) professional flourish in China, increasing broadband access network has been supported IGMP, and (Intemet Group ManagementProtocol is IGMP) with based on the multicast service of IGMP agreement.Multicast can effectively utilize the network bandwidth with respect to clean culture, reduces network traffics, improves the efficient of transfer of data.At present, multicasting technology becomes the critical support technology of many network applications, for example: network multimedia conference, long-distance education, IPTV, online relay in real time, network data issue, distributed collaboration work etc.Yet how better realization also will realize conserve bandwidth for the controllability of user's request program in the time of the quality of assurance user video stream in IPTV uses, and is the problem that the IPTV development faces always.
Prior art has mainly adopted two kinds of technical schemes to realize the controllability of request program in the IPTV business: a kind of is traditional IGMP technical scheme, and another is to increase the scheme of leaving fast that multicast channel leaves function fast on the IGMP technical scheme basis.
Fig. 1 is the professional networking schematic diagram of IPTV.Among the figure, multicast router links to each other with the IPTV network, and the multicast user inserts by multicast agent, links to each other with multicast router then.For the multicast user, multicast agent equipment is realized the function of multicast router, i.e. adding by the receiving group user, leave request, periodically issues query message, safeguards the multicast member relation; For multicast router, multicast agent equipment then is a multicast host, by sending the service that adds or leave certain multicast group on acquisition request or the cancellation multicast router.Pass through IGMP agreement mutual communication between multicast user and multicast agent, multicast agent and the multicast router.
IGMP agreement regulation, receive the leave message of multicast user under the port when multicast router after, need to send the group-specific query message, wait for other users' that may exist under this multicast group response, to determine whether to also have other multicast users in this group in the network that this port connected, when confirming do not have other users after this multicast group, this port could be deleted from the list item of this multicast group, thereby having guaranteed that leaving of a user can not be disturbed may belong to other users of a multicast group with this user.
But the time-delay that above-mentioned multicast group-specific query message process is produced has brought problem in the IPTV of reality service application.In the IPTV business that is provided by multicasting technology, user's channel handover operation comprises: send the IGMP leave message of original channel, the IGMP that sends new channel joins message.After multicast access equipment receives IGMP leave message, can be at once original video flowing be interrupted, but after will sending IGMP group-specific query message, wait for whether the user responds IGMP and join message after, whether determine break of video stream again.During multicast access equipment wait-for-response message, just can not cause new and old video flowing to issue simultaneously, waste a large amount of bandwidth timely with original channel deletion.For example, when the user browses a plurality of channels fast successively, from channel 1 to channel 10, will in a period of time, there be the video flowing of 10 channels to send to simultaneously on the multicast service port of multicast access equipment like this, may substantially exceed the downlink bandwidth of this service port, cause message dropping, delay, user's video frequency program quality sharply descends, even can't watch.
In order to address the above problem, prior art has adopted a kind of multicast user that can interrupt leaving multicast user's video flowing rapidly to leave scheme fast again.This scheme is still based on the IGMP agreement.As shown in Figure 2, in above-mentioned IPTV service application, when user's switching channels, receive the IGMP leave message of original channel when port after, multicast access equipment is deleted this port at once from the list item of the multicast group left, stop forwarding the video flowing of original channel, avoids occurring new and old two channels and issues simultaneously, thereby realization this port of any time can only be transmitted the program of a channel, saves device bandwidth.
But the above-mentioned scheme of leaving fast only is applicable to the situation of having only a multicast user under the service port of multicast access equipment, inserts a plurality of multicast users' situation down for a service port, and new problem is arranged again.
As shown in Figure 3, suppose that (Digital Subscriber Line AccessMultiplexer DSLAM) has adopted the scheme of leaving fast in the Device IP TV service application to Digital Subscriber Line Access Multiplexer.Can see when set-top box (Side Top Box, STB) simultaneously viewing channel 1 time, DSLAM only can send the video flowing of a channel 1 downwards, is copied into two parts of video flowings by hub (HUB) then, respectively to STB1 and STB2 for STB1 and STB2; But when user's switching channels of STB1 time the channel 2, STB1 will send the joining message of leave message, channel 2 of channel 1, because DSLAM can't know that STB2 is also just at receiving channels 1 in addition, and DSLAM has started and has left function fast, and DSLAM will transmit the video flowing of channel 2 directly with the video flowing deletion of channel 1, user for STB2, the interruption program that unexpected channel 1 will occur, after STB2 initiated to join request again, the video of channel 1 could recover.Like this, two multicast users have just produced situation about interfering with each other in the process that channel switches.
So, inserting down a plurality of multicast users' situation at a service port, prior art has adopted a kind of technology again, combines the group-specific query characteristic of IGMP technical scheme recited above and leaves the characteristic of the fast shut-off video flowing of scheme fast.
In this The Application of Technology, multicast access equipment starts a plurality of multicast users under the service port and leaves function fast, also is provided with one simultaneously and leaves the response time fast.Receive a multicast user's the multicast leave message of switching channels request when a service port of multicast access equipment after, multicast user under this port sends the group-specific query message that channel is left in this request, to determine whether also to exist other multicast user watching this channel, if do not receive in the response time that in given leaving fast other multicast user sends joining message of this channel, then thinking does not have other users watching this channel, therefore cut off the multicast data flow of this channel immediately, send joining message of this channel if receive other multicast user in the response time in given leaving fast, then do not cut off the multicast data flow of this channel, continue to transmit.
In this technical scheme, owing to can be controlled in the rational and enough short time with leaving the response time fast, therefore this technical scheme can be implemented in time of enough weak points and cut off the message that the multicast user leaves rapidly, the oversize use that influences bandwidth of multicast channel residence time of having avoided application to leave can guarantee again can not produce interference to other multicast user to the multicast user who leaves simultaneously.
But in the controlled multicasting service application, such scheme really can not be realized well.Multicast channel number that at most can program request under service port of controlled multicasting business need control, under this prerequisite, above-mentioned technical scheme may cause channel to switch unsuccessful situation.The maximum program request channel number of supposing a service port is 2, and two multicast users under this service port are on-demand multicasting channel A and B respectively.When the multicast user of demanding channel A wants to switch to channel C, this multicast user can send the leave message of channel A and joining message of channel C to multicast access equipment.After multicast access equipment receives the leave message of the multicast channel A that this multicast user sends, issue the specific multicast query message of channel A to this port, leave fast the response time overtime before, also exist two channels to transmit under this port, current multicast access equipment receives joining message of channel C again, because online multicast channel number of while has reached 2 under this port at this moment, so principle according to controlled multicasting, multicast access equipment can be refused the adding of channel C, thus the failure that causes channel to switch.Certainly, if leave fast response message overtime after, if the multicast user sends joining message of channel C again, then can program request success.Also be, when the current multicast channel number of transmitting has reached maximum multicast channel that port allow to insert and has counted, the multicast user must wait for and leave overtime can switching among the multicast channel C that will add of response time fast, such channel change delay is undesirable for the multicast user, or even can't receive.
Summary of the invention
The technical problem that the present invention solves is to propose a kind of multicast channel method for handover control and device, to avoid the prior art influence that the channel time delay for switching brings for user's quality of service under the situation that single-port and multi-user inserts.
For addressing the above problem, the present invention proposes a kind of multicast channel control method, comprising:
When multicast access equipment receives the multicast channel leave message, send the multicast channel group-specific query message that application is left to the service port that receives described multicast channel leave message, after the group-specific query response time is overtime, stop to apply for the forwarding of the multicast channel that leaves;
A) join message when receiving multicast channel, judge whether to allow the current business port to add the multicast channel that application adds, if, transmit the multicast channel that this application adds, otherwise, execution in step b);
B) whether inquiry exists application to leave the back does not also receive response before overtime in the group-specific query response time multicast channel in the current channel of transmitting of described service port, if exist, stop forwarding the multicast channel that application is left, and the multicast channel of forwarding this application adding, otherwise, the adding of the multicast channel of the adding that refuses an application.
Wherein, described stopping forwarding applies for that a multicast channel that leaves is to stop forwarding the multicast channel that the overtime the earliest application of response time general is left.
Wherein, when receiving the multicast channel leave message, also comprise step: application is left the back also do not receive response before overtime in the group-specific query response time multicast channel and is set to be about to leave state;
When receiving the multicast channel leave message, described in the current channel of transmitting inquiry whether exist application to leave the back also do not receive response before overtime in the group-specific query response time multicast channel to be: whether inquiry exists and is in the multicast channel that is about to the state that leaves in the current channel of transmitting.
Wherein, the described step that allows the current business port to add the multicast channel of application adding that judges whether of step a) is:
Judge whether the multicast channel that application adds is the current multicast channel of transmitting, if then allow the adding of the multicast channel of described application adding; Otherwise, judge whether to allow the current business port to add new multicast channel, if, then allow the adding of the multicast channel of described application adding, otherwise, then do not allow the adding of the multicast channel of described application adding.
Wherein, the described step that allows the current business port to add new multicast channel that judges whether is:
Judge the multicast channel the number whether current multicast channel number of transmitting of described service port can insert less than described service port, if, then allow the adding of new multicast channel, otherwise, then do not allow the adding of new multicast channel.
Correspondingly, the invention allows for a kind of multicast channel control device, it comprises that channel leaves processing unit and channel adds processing unit, wherein,
Channel leaves processing unit, be used for after receiving the multicast channel leave message, send the multicast channel group-specific query message that application is left to the service port that receives described multicast channel, in the group-specific query response time overtime after, stop to apply for the forwarding of the multicast channel that leaves;
And described channel adding processing unit comprises multicast forwarding unit, first control unit and second control unit, wherein:
The multicast forwarding unit is used to control the forwarding of multicast channel;
First control unit is used for judging whether to allow the current business port to add the multicast channel that this application adds receiving after multicast channel joins message, if, notice multicast retransmission unit is transmitted the multicast channel that this application adds, otherwise, give second control unit and handle;
Second control unit, whether the channel inquiry that is used for transmitting current exists application to leave the back does not also receive response before overtime in the group-specific query response time multicast channel, if exist, notice multicast retransmission unit stops forwarding the multicast channel that application is left, and the multicast channel of forwarding this application adding, otherwise, the adding of the multicast channel of the adding that refuses an application.
Wherein, stop forwarding in described second control unit a multicast channel that described application leaves be stop forwarding the response time will overtime the earliest multicast channel.
Described channel leaves processing unit and also comprises the setting state unit, is used for application and leaves the back also do not receive response before overtime in the group-specific query response time multicast channel and be set to be about to leave state;
Whether the inquiry of described second control unit exists application to leave the back also do not receive response before overtime in the group-specific query response time multicast channel: whether inquiry exists and is in the multicast channel that is about to the state that leaves in the current channel of transmitting.
Wherein, described first control unit further comprises:
First judging unit judges whether the multicast channel that application adds is the current multicast channel of transmitting, if, then allow the adding of the multicast channel of described application adding, otherwise, notify second judging unit to judge;
Second judging unit judges whether to allow the current business port to add new multicast channel, if, then allow the adding of the multicast channel of described application adding, otherwise, then do not allow the adding of the multicast channel of described application adding.
Wherein, described second judgment unit judges step that whether allows the current business port to add new multicast channel is: judge the multicast channel the number whether current multicast channel number of transmitting of described service port can insert less than described service port; If, then allow the adding of new multicast channel, otherwise, then do not allow the adding of new multicast channel.
Compared with prior art, the present invention has realized also controlling rationally and effectively the switching of multicast channel in fast response time under the situation that controlled single-port and multi-user inserts, reduced the channel time delay for switching, has guaranteed the quality of multicast service.
Description of drawings
Fig. 1 is the professional networking diagram of prior art IPTV;
Fig. 2 is that the prior art multicast channel leaves technical schematic diagram fast;
Fig. 3 leaves technical scheme technical problem schematic diagram fast;
Fig. 4 is a multicast channel control method execution in step schematic diagram of the present invention;
Fig. 5 is the professional networking diagram of embodiment of the invention IPTV;
Fig. 6 is that multicast channel control method embodiment multicast of the present invention leaves process chart;
Fig. 7 is that multicast channel control method embodiment multicast of the present invention adds process chart;
Fig. 8 is a multicast channel control device structural representation of the present invention.
Embodiment
With reference to the accompanying drawings embodiments of the invention are made detailed explanation below.
Main thought of the present invention is on the basis of existing technology, multicast access equipment is received the processing that multicast joins message improved, and application is left and the effectively control rationally of the multicast channel that adds realizing.
In the prior art, after multicast access equipment receives the multicast channel leave message, send the multicast channel group-specific query message that described application is left to the service port that receives described multicast channel, and startup group-specific query fast response time timer, behind the timer expired, stop to apply for the forwarding of the multicast channel that leaves immediately.
And receiving multicast channel when joining message, as shown in Figure 4, the present invention adopts following steps:
01) receiving group inserts message.
02) judge whether to allow the current business port to add the multicast channel that application adds, if, execution in step 05), otherwise, execution in step 03).
03) whether inquiry exists application to leave the back does not also receive response before overtime in the group-specific query response time multicast channel in the current channel of transmitting, if, execution in step 04), otherwise, the refuse an application adding of the multicast channel that adds, EO.
04) stops forwarding the multicast channel that application is left.
05) transmits the multicast channel that this application adds; EO.
According to embodiment foregoing description is specifically described below.
As shown in Figure 5, in the IPTV access network, DSLAM equipment is multicast access equipment, serves as the function of multicast router, and DSLAM equipment provides xDSL service port to the user; At user side, (MOdulation and DEModulation MODEM) connects, and two STB are connected with a television set respectively by HUB and same xDSL modulator-demodulator for two STB equipment.
The operation of every STB can be divided into three types: start, switching channels, and shutdown.Wherein, can send multicast during the STB start and join message, switching channels can send the multicast leave message of current channel earlier, and the multicast that sends new channel then joins message, and shutdown then can be sent the multicast leave message of current channel.Therefore, also can reduce the processing of request of client STB multicast is left the processing that request and multicast join request.
In the present embodiment kind, as shown in Figure 6 for the processing procedure of multicast leave message:
11) receiving group leave message;
12) send the group-specific query message of the channel that application leaves to the xDSL port that receives the multicast leave message, the state of channel is set to be about to leave state, and starts the fast response time timer;
13) judge whether overtime device is overtime, if, stop the forwarding of the channel data that this application leaves, EO, otherwise, execution in step 14);
14) judge whether to receive the response message of group-specific query, if, change the state of channel into normal condition, and with the timer zero clearing, EO, otherwise, continue execution in step 13).
Correspondingly, the processing procedure that joins message for multicast is as shown in Figure 7:
21) receiving group inserts message;
22) adding of the multicast channel that judges whether to allow current xDSL port to accept applications to add, if, execution in step 25), otherwise, execution in step 23);
23) whether inquiry exists and is in the multicast channel that is about to the state that leaves in the current channel of transmitting, if, execution in step 24), otherwise, the adding of the multicast channel that adds of refusing an application, EO;
24) stop forwarding described being in and be about to the multicast channel state that leaves, that application is the earliest left;
25) transmit the multicast channel that this application adds; EO.
According to above-mentioned treatment step, principle in this enforcement and application are described specifically below in conjunction with three kinds of above-mentioned operations.
Suppose that STB user carries out power-off operation or the channel handover operation sends the multicast leave message to DSLAM, after DSLAM receives the multicast leave message that this STB sends, send the group-specific query message of the channel that application leaves to the xDSL of this STB port, the state of channel is set to be about to leave state simultaneously, and starts quick response timer.
In fast response time, also be before the timer expired, following three kinds of situations may appear:
1) do not receive any joining message.
This situation may appear after STB user's shutdown.
In this case, timer expired, the data of the channel that this STB user applies is left can stop forwarding.
2) receive joining message of this current channel of transmitting of xDSL port.
When a STB user just shuts down, STB user is just starting shooting and joining a channel of transmitting in addition, perhaps STB user just shuts down, another one STB user is at switching channels to a channel of transmitting, perhaps STB user's switching channels to a channel of transmitting all this situation may occur.
In this case, because the channel that application adds is transmitted by current xDSL port, do not need to increase or delete the forwarding data of multicast channel.
This situation comprises two kinds of situations again: the channel that application adds is to be about to the current of the state that leaves transmitting channel and applying for that the channel that adds is the current channel of transmitting of normal condition.
For a kind of situation in front, be normal condition with this status modifier that is in the channel that is about to the state that leaves, the zero clearing timer is normally transmitted this channel.
For a kind of situation in back, need not do any processing.
3) receive joining message of new channel.
When a STB user just shuts down, STB user is just starting shooting and joining a new channel in addition, perhaps STB user just shuts down, another one STB user is at switching channels to a new channel, perhaps STB user's switching channels all this situation may occur to new channel.
In this case, judge at first whether current xDSL service port also allows the adding of this new channel, if, directly transmit the channel data that new application adds to this port, otherwise, inquiring about current whether the existence is in the channel that is about to the state that leaves, if, then end the forwarding that this is in the channel that is about to the state that leaves, transmit this initiate multicast channel, otherwise, can't add this new multicast channel.
In actual applications, an xDSL service port all is provided with a maximum multicast channel number that allows access, and this maximum incoming multicast channel number is provided with according to the bandwidth of xDSL port or the needs of management.Judge that whether current xDSL service port allows the adding of new channel promptly is to judge that whether the current channel number of transmitting of this port allows to insert channel number less than the maximum of this ports-settings, if less than, then allow the access of this new adding channel, otherwise, do not allow its access.
In addition, judge current whether the existence in the process that is in the channel that is about to the state that leaves above-mentioned, if currently have more than one and be in the channel that is about to the state that leaves, then end the forwarding of the channel should leave at first, wherein should leave and can adopt dual mode to judge in actual applications, the one, wherein apply for the channel that leaves the earliest, the 2nd, from immediate channel of the overtime moment.
Like this, in this case, if the current forwarding channel number of port has equaled the maximum channel number that allows to insert, the channel that new application adds can't be accepted according to the condition of access control, is in the channel that is about to the state that leaves but still is forwarded so just seek whether to have, if exist, just end to be in the forwarding of one of them channel that should leave that is about to the state that leaves, transmit this initiate multicast channel, otherwise, can't add this new multicast channel.
Several operations are analyzed to the STB that may produce this situation below:
When a STB user just shuts down, when in addition STB user is just starting shooting and joining a new channel, needs two STB users' action just this situation may occur just in fast response time, so the likelihood ratio of this situation is lower.
When a STB user just shuts down, another one STB user is during at switching channels, need two STB users' action in fast response time, just this situation may occur just equally, so the probability of this situation is also lower.
As a STB user during at switching channels to new channel, because STB user successively sends the multicast leave message of existing channel and the multicast of new channel joins message to DSLAM equipment in a short period of time in switching channels, the probability of this situation is much higher.So this embodiment has bigger meaning to STB user's control to multicast channel when the switching channels.
Correspondingly, the present invention also provides the multicast channel control device, and the method above this device adopts realizes the adding of multicast channel and effective control of leaving.Below embodiment is described.
As shown in Figure 8, DSLAM equipment comprises that channel leaves processing unit and channel adds processing unit, its mid band is left processing unit after receiving the multicast channel leave message, send the group-specific query message of the channel that application leaves to the xDSL port that receives the multicast leave message, the state of channel is set to be about to leave state, and starts the fast response time timer.Behind the timer expired, stop to apply for the forwarding of the multicast channel that leaves immediately.
Its mid band adds processing unit and comprises multicast forwarding unit, first control unit and second control unit again, wherein:
The multicast forwarding unit mainly comprises two operations according to the forwarding that comes from the commands for controlling multicast channel of other unit: stop forwarding the multicast channel of an appointment and begin to transmit the multicast channel of an appointment.
First control unit is receiving after multicast channel that STB user sends joins message, judge whether current xDSL port allows to apply for the adding of the multicast channel that adds, if, notice multicast retransmission unit is transmitted the multicast channel that this application adds, otherwise, give second control unit and further handle;
In actual applications, an xDSL service port all is provided with a maximum multicast channel number that allows access, and this maximum incoming multicast channel number is provided with according to the bandwidth of xDSL port or the needs of management.Judge that whether current xDSL service port allows the adding of new channel promptly is to judge that whether the current channel number of transmitting of this port allows to insert channel number less than the maximum of this ports-settings, if less than, then allow the access of this new adding channel, otherwise, do not allow its access.
First control unit comprises channel judging unit and channel number comparing unit again.In the process of above-mentioned access control judgment unit judges, at first whether the multicast channel of this STB user applies adding of channel judgment unit judges is the multicast channel that current xDSL port has been transmitted, if, do not do any processing, otherwise, continue to judge that by the channel number comparing unit whether channel number that current xDSL port transmitting allows the access channel number less than the maximum of this ports-settings, if less than, then notify the multicast retransmission unit to begin to transmit the data of this new adding channel, otherwise, tentatively be judged as the access that does not allow this channel.
Second control unit can't have been accepted to start working behind the new multicast channel of applying for adding in the preliminary judgement of first control unit.Second control unit is after the notice that receives first control unit, in the multicast channel of the current forwarding of xDSL port, inquire about whether to exist and be in the multicast channel that is about to the state that leaves, if have, then notify the multicast retransmission unit to end the forwarding that this is in the channel that is about to the state that leaves, begin to transmit this initiate multicast channel, otherwise final affirmation can't add this new multicast channel.
Equally, judge whether to exist in the process that is in the channel that is about to the state that leaves above-mentioned, if currently have more than one and be in the channel that is about to the state that leaves, then end the forwarding of the channel should leave at first, wherein should leave and can adopt dual mode to judge in actual applications, the one, wherein apply for the channel that leaves the earliest, the 2nd, from immediate channel of the overtime moment.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. multicast channel control method is characterized in that:
A) join message when receiving multicast channel, judge whether to allow the current business port to add the multicast channel that application adds, if, transmit the multicast channel that this application adds, otherwise, execution in step b);
B) whether inquiry exists application to leave the back does not also receive response before overtime in the group-specific query response time multicast channel in the current channel of transmitting of described service port, if exist, stop forwarding the multicast channel that application is left, and the multicast channel of forwarding this application adding, otherwise, the adding of the multicast channel of the adding that refuses an application.
2. multicast channel control method as claimed in claim 1 is characterized in that, described the stopping forwarding of step b) applies for that a multicast channel that leaves is to stop forwarding the multicast channel that overtime the earliest application of response time is left.
3. multicast channel control method as claimed in claim 1 is characterized in that:
When receiving the multicast channel leave message, application is left the back also do not receive response before overtime in the group-specific query response time multicast channel and is set to be about to leave state;
When receiving the multicast channel leave message, described in the current channel of transmitting inquiry whether exist application to leave the back also do not receive response before overtime in the group-specific query response time multicast channel to be: whether inquiry exists and is in the multicast channel that is about to the state that leaves in the current channel of transmitting.
4. multicast channel control method as claimed in claim 1 is characterized in that, the described step that allows the current business port to add the multicast channel of this application adding that judges whether of step a) is:
A1) judge whether the multicast channel that application adds is the current multicast channel of transmitting, if, then allow the adding of the multicast channel of described application adding, otherwise, execution in step a2);
A2) judge whether to allow the current business port to add new multicast channel, if, then allow the adding of the multicast channel of described application adding, otherwise, then do not allow the adding of the multicast channel of described application adding.
5. multicast channel control method as claimed in claim 4 is characterized in that step a2) described in the step that allows the current business port to add new multicast channel that judges whether be:
Judge the multicast channel the number whether current multicast channel number of transmitting of described service port can insert less than described service port, if, then allow the adding of new multicast channel, otherwise, then do not allow the adding of new multicast channel.
6. a multicast channel control device comprises that channel leaves processing unit and channel adds processing unit, wherein,
Channel leaves processing unit, be used for after receiving the multicast channel leave message, send the multicast channel group-specific query message that application is left to the service port that receives described multicast channel, in the group-specific query response time overtime after, stop to apply for the forwarding of the multicast channel that leaves;
It is characterized in that described channel adds processing unit and includes multicast forwarding unit, first control unit and second control unit, wherein:
The multicast forwarding unit is used to control the forwarding of multicast channel;
First control unit is used for judging whether to allow the current business port to add the multicast channel that application adds receiving after multicast channel joins message, if, notice multicast retransmission unit is transmitted the multicast channel that this application adds, otherwise, give second control unit and handle;
Second control unit, whether the channel inquiry that is used for transmitting current exists application to leave the back does not also receive response before overtime in the group-specific query response time multicast channel, if exist, notice multicast retransmission unit stops forwarding the multicast channel that application is left, and the multicast channel of forwarding this application adding, otherwise, the adding of the multicast channel of the adding that refuses an application.
7. multicast channel control device as claimed in claim 6 is characterized in that, stop forwarding a multicast channel that described application leaves in described second control unit and be stop forwarding the response time will overtime the earliest multicast channel.
8. multicast channel control device as claimed in claim 6 is characterized in that:
Described channel leaves processing unit and also comprises the setting state unit, is used for application and leaves the back also do not receive response before overtime in the group-specific query response time multicast channel and be set to be about to leave state;
Whether the inquiry of described second control unit exists application to leave the back also do not receive response before overtime in the group-specific query response time multicast channel: whether inquiry exists and is in the multicast channel that is about to the state that leaves in the current channel of transmitting.
9. multicast channel control device as claimed in claim 6 is characterized in that, described first control unit specifically comprises:
First judging unit judges whether the multicast channel that application adds is the current multicast channel of transmitting, if, then allow the adding of the multicast channel of described application adding, otherwise, notify second judging unit to judge;
Second judging unit judges whether to allow the current business port to add new multicast channel, if, then allow the adding of the multicast channel of described application adding, otherwise, then do not allow the adding of the multicast channel of described application adding.
10. multicast channel control device as claimed in claim 9, it is characterized in that whether described second judgment unit judges allows the current business port to add new multicast channel is: judge the multicast channel the number whether current multicast channel number of transmitting of described service port can insert less than described service port; If, then allow the adding of new multicast channel, otherwise, then do not allow the adding of new multicast channel.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100358816A CN100563206C (en) | 2006-06-09 | 2006-06-09 | A kind of multicast channel control method and device |
| PCT/CN2007/001644 WO2007140702A1 (en) | 2006-06-09 | 2007-05-21 | Multicast service processing method and access equipment |
| CN201510227559.2A CN104837070A (en) | 2006-06-09 | 2007-05-21 | Multicast service processing method, system and access device |
| SG2011041936A SG172691A1 (en) | 2006-06-09 | 2007-05-21 | Multicast service processing method and access equipment |
| EP07721217A EP2034731A4 (en) | 2006-06-09 | 2007-05-21 | Multicast service processing method and access equipment |
| CNA2007800002486A CN101313575A (en) | 2006-06-09 | 2007-05-21 | Multicast service handling method, system and access apparatus |
| US12/330,188 US20090147786A1 (en) | 2006-06-09 | 2008-12-08 | Multicast service processing method and access equipment |
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| CNB2006100358816A CN100563206C (en) | 2006-06-09 | 2006-06-09 | A kind of multicast channel control method and device |
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| CN101056255A CN101056255A (en) | 2007-10-17 |
| CN100563206C true CN100563206C (en) | 2009-11-25 |
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| CNB2006100358816A Expired - Fee Related CN100563206C (en) | 2006-06-09 | 2006-06-09 | A kind of multicast channel control method and device |
| CNA2007800002486A Pending CN101313575A (en) | 2006-06-09 | 2007-05-21 | Multicast service handling method, system and access apparatus |
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| CNA2007800002486A Pending CN101313575A (en) | 2006-06-09 | 2007-05-21 | Multicast service handling method, system and access apparatus |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101605040B (en) * | 2008-06-12 | 2012-10-10 | 中兴通讯股份有限公司 | Multicast control method under single-port and multi-user access mode and device |
| CN101877678B (en) * | 2010-07-01 | 2014-07-16 | 中兴通讯股份有限公司 | Method and device for multicast users of specific source group to leave quickly |
| CN104518889A (en) * | 2013-10-08 | 2015-04-15 | 中兴通讯股份有限公司 | Multicast message responding method and multicast message responding device |
| US20190191212A1 (en) * | 2015-05-20 | 2019-06-20 | Nxt Solutions Ag | Iptv in managed networks |
| WO2017173654A1 (en) * | 2016-04-08 | 2017-10-12 | 汤美 | Internet-based video transmission method and system |
| CN113794994B (en) * | 2021-08-26 | 2023-02-24 | 珠海格力电器股份有限公司 | Information gathering method and device based on multicast domain name system and application thereof |
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| CN101313575A (en) | 2008-11-26 |
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