CN103023731A - Method and system for implementing cascading conferences - Google Patents
Method and system for implementing cascading conferences Download PDFInfo
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- CN103023731A CN103023731A CN2012104966549A CN201210496654A CN103023731A CN 103023731 A CN103023731 A CN 103023731A CN 2012104966549 A CN2012104966549 A CN 2012104966549A CN 201210496654 A CN201210496654 A CN 201210496654A CN 103023731 A CN103023731 A CN 103023731A
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Abstract
The invention discloses a method and a system for implementing cascading conferences. The cascading topological structure of the cascading conferences comprises point-to-point cascade, master-slave cascade or point-to-point and master-slave mixed cascade. The method comprises the following steps of: A, converting the cascading topological structure of the cascading conferences into a first tree topological structure, and initiating the conference of a broadcast end of a global broadcast as a root node of the first tree topological structure, wherein the other conferences in the cascading conferences are in one-to-one correspondence to the other nodes in the first tree topological structure; and B, broadcasting the contents broadcasted by the broadcast end layer by layer from the conference corresponding to the root node according to the level of the first tree topological structure. By adopting the technical scheme, the problem that a global broadcast/ selective viewing function cannot be realized in the cascading conferences of the prior art is solved.
Description
Technical field
The present invention relates to the video conference field, relate in particular to a kind of subtended conference implementation method and system.
Background technology
In video conference system, because single MCU(Multipoint process unit) reasons such as the capacity limit of server, rights management, often need many MCU of combination hold together relatively large video conference.Therefore need to become a subtended conference to the meeting of holding at each MCU according to certain principal and subordinate and/or point-to-point composition of relations.The participant of this type of meeting is distributed among each different MCU, so the common function in some single-stage meeting is difficult to realize, for example overall situation broadcasting is seen function with overall situation choosing.
Summary of the invention
The invention provides a kind of subtended conference implementation method and system, the subtended conference that solves prior art can't realize overall situation broadcasting choosing see the problem of function.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of subtended conference implementation method, the cascading topological structure of described subtended conference comprises point-to-point cascade, principal and subordinate's cascade, perhaps point-to-point and principal and subordinate's Mixed cascading, described subtended conference implementation method comprises: steps A, the cascading topological structure of described subtended conference is converted to the first tree topology, the meeting of initiating the initiator place of overall situation broadcasting is the root node of described the first tree topology, and other meetings are corresponding one by one with other nodes of described the first tree topology in the described subtended conference; Step B, from the corresponding meeting of described root node, according to the level of described the first tree topology, the content that described initiator is broadcasted is successively broadcasted.
Further, described step B is specially: step B1, carry out locally broadcast in the corresponding meeting of described root node; Lower one deck node of step B2, described the first tree topology of traversal; Step B3, respectively in the corresponding meeting of each node on described lower one deck, the cascade port of last layer node is carried out locally broadcast as initiator, after each node of this layer all finished locally broadcast, judge whether to exist to descend again one deck node, if exist, then enter step B2, otherwise, process ends.
Further, described subtended conference implementation method also comprises: step C, described initiator carry out overall situation choosing in described subtended conference sees.Further, described step C comprises: step C1, obtain initiator place meeting described in described the first tree topology and see path between the end place meeting to target choosing; Step C2, according to the level in the path that gets access to, the selected content of seeing from end place meeting is seen in described target choosing, is successively selected to the place meeting of described initiator and to be seen operation.
Further, described step C1 is specially: step C11, the place meeting of described initiator is pressed into stack top; Step C12, search and whether exist the choosing of described target to see end in the stack top meeting, then obtain the path by end if exist described target choosing to see; If do not exist described target choosing to see end, then judge whether to exist lower one deck node, if exist, then enter step C13, then do not enter step C14 if do not exist; Step C13, meeting corresponding to arbitrary node on described lower one deck is pressed into stack top, enters step C12; Step C14, stack is ejected in the meeting of current stack top, judge and eject whether stack is empty behind the stack, if then flow process finishes; If stack is not empty, then enter step C15; Step C15, judge whether to exist with the meeting of being popped with layer and be not pressed into the sibling of stack, if exist, then will be pressed into stack with meeting corresponding to arbitrary sibling that be not pressed into stack in the layer, enter step C12, if do not have the node with layer, then enter step C14.
Further, described step C2 is specially: step C21, carry out part choosing see operation in the stack top meeting; Step C22, meeting is ejected from stack top, the cascade port that is ejected meeting is seen end as the choosing of new stack top, carry out part choosing and see operation, until stack is sky.
Further, described subtended conference implementation method also comprised before described steps A: the cascading topological structure that configures subtended conference to be held; From the cascading topological structure of subtended conference described to be held, find out a top layer meeting, take described top layer meeting as root node, the cascading topological structure of subtended conference described to be held is converted to the second tree topology, and other meetings are corresponding one by one with other nodes of described the second tree topology in the subtended conference described to be held; According to described the second tree topology, give topological relation corresponding to configuration between the Multipoint process unit wait to hold each meeting; From the root node of described the second tree topology, according to from top to bottom, from left to right order holds each meeting in described the second tree topology successively.
A kind of subtended conference is realized system, the cascading topological structure of described subtended conference comprises point-to-point cascade, principal and subordinate's cascade, perhaps point-to-point and principal and subordinate's Mixed cascading, described subtended conference realization system comprises that the first tree topology sets up module and overall Broadcasting Control module, wherein, described the first tree topology is set up module and is used for the cascading topological structure of described subtended conference is converted to the first tree topology, the meeting of initiating the initiator place of overall situation broadcasting is the root node of described the first tree topology, and other meetings are corresponding one by one with other nodes of described the first tree topology in the described subtended conference; Described overall Broadcasting Control module is used for according to the level of described the first tree topology, the content that described initiator is broadcasted successively being broadcasted from the corresponding meeting of described root node.
Further, described subtended conference realizes that system comprises that also overall situation choosing sees control module, is used for described initiator and carries out the overall situation at described subtended conference and select and see.
Subtended conference as claimed in claim 8 is realized system, it is characterized in that, described overall situation choosing sees that control module comprises that path acquisition module and overall situation choosing see the control submodule, wherein, described path acquisition module is used for obtaining initiator place meeting described in described the first tree topology and sees the path of holding between the meeting of place to the target choosing; Described overall situation choosing sees that the control submodule is used for the level in the path that gets access to according to described path acquisition module, and the selected content of seeing from end place meeting is seen in described target choosing, is successively selected to the place meeting of described initiator and to be seen operation.
Further, described subtended conference realizes that system comprises that also cascading topological structure configuration module, the second tree topology set up module, Multipoint process cell location module and subtended conference and hold module, and wherein: described cascading topological structure configuration module is used for configuring the cascading topological structure of subtended conference to be held; Described the second tree topology is set up module and is used for finding out a top layer meeting from the cascading topological structure of subtended conference described to be held, take described top layer meeting as root node, the cascading topological structure of subtended conference described to be held is converted to the second tree topology, and other meetings are corresponding one by one with other nodes of described the second tree topology in the subtended conference described to be held; Described Multipoint process cell location module is used for according to described the second tree topology, gives topological relation corresponding to configuration between the Multipoint process unit of waiting to hold each meeting; Described subtended conference is held module and is used for from the root node of described the second tree topology, according to from top to bottom, from left to right order holds each meeting in described the second tree topology successively.
The invention provides a kind of subtended conference implementation method and system, the cascading topological structure of subtended conference is converted to the first tree topology, the meeting of initiating the initiator place of overall situation broadcasting is the root node of this first tree topology, other meetings are corresponding one by one with other nodes of the first tree topology, again from the corresponding meeting of this root node, according to the level of this first tree topology, the content that this initiator is broadcasted is successively broadcasted.The present invention can compatible each different vendor MCU, only need manufacturer that MCU API control interface agreement is provided, the concrete agreement of holding a meeting with MCU (H.320 H323 SIP) is irrelevant, the pattern of the point-to-point cascade of support point subtended conference (claiming again simple cascade), principal and subordinate's cascade, point-to-point and principal and subordinate's Mixed cascading.
Further, the present invention can also realize that the overall situation choosing of initiator in subtended conference see.
Description of drawings
The flow chart of the subtended conference implementation method that Fig. 1 provides for one embodiment of the invention;
The schematic diagram of the cascading topological structure that Fig. 2 provides for one embodiment of the invention;
Fig. 3 a is the schematic diagram of the second tree topology of obtaining after the cascading topological structure shown in Figure 2 conversion;
Fig. 3 b is the schematic diagram of another the second tree topology of obtaining after the cascading topological structure shown in Figure 2 conversion;
Fig. 3 c is the schematic diagram of another the second tree topology of obtaining after the cascading topological structure shown in Figure 2 conversion;
Fig. 4 a is the schematic diagram of the first tree topology of obtaining after the cascading topological structure shown in Figure 2 conversion;
Fig. 4 b is the schematic diagram of another the first tree topology of obtaining after the cascading topological structure shown in Figure 2 conversion;
The subtended conference that Fig. 5 provides for one embodiment of the invention is realized the schematic diagram of system.
Embodiment
Main design of the present invention is: the cascading topological structure of existing subtended conference has point-to-point cascade, principal and subordinate's cascade, the pattern of point-to-point and principal and subordinate's Mixed cascading, no matter be which kind of pattern, the present invention is converted to the first tree topology with this cascading topological structure, the meeting of initiating the initiator place of overall situation broadcasting is the root node of the first tree topology, other meetings are corresponding one by one with other nodes of the first tree topology, again from the corresponding meeting of this root node, according to the level of this tree topology, the content that this initiator is broadcasted is successively broadcasted.
Can form specific cascade connection between any two meetings, but the meeting number is when increasing, its cascade connection more complicated.The cascading topological structure of subtended conference comparatively common are at present: point-to-point cascade, principal and subordinate's cascade, point-to-point and principal and subordinate's Mixed cascading.Wherein,
Point-to-point cascade refers to: between two MCU, all the other side is regarded as a common terminal, all send order to the other side, rather than request, and arbitrary MCU do not process the order that another MCU sends, and directly ignores, therefore, the pattern of point-to-point cascade, a lot of functions can't realize.
Principal and subordinate's cascade refers to: a side is that the meeting that main MCU(holds at main MCU is main meeting, otherwise carry out the MCU of main meeting, be main MCU), an other side be from MCU(in the meeting of holding from MCU for from meeting, be from MCU otherwise carry out from the MCU of meeting).Master slave relation can be consulted by h245MasterSlaveDetermination definite, during master-slave negotiation, determines principals and subordinates by 2 data, and data are NE type, and the another one data are a random value.The H323 agreement has been stipulated the size of the numerical value that network element should be filled in.In negotiations process, what the NE type value was large is main, if network element values is identical, then determines the principal and subordinate according to the size of random value, and what random value was large is main.Therefore between MCU and the terminal, based on the regulation of H323 agreement, MCU is main forever.And between 2 MCU, then according to random value determine who main who from.For main MCU, regard a common terminal as from the link of MCU, directly send instruction to it and get final product.For from MCU, must carry out or be transmitted to its more MCU of next stage for the order that comes autonomous MCU.For the request that comes self terminal, if the overall situation unique (if overall situation broadcasting) then must be forwarded to main MCU to this request.Namely can only guarantee that from MCU own only transmission request is to main MCU.Master slave relation is relative, and in a subtended conference that is comprised of the meeting more than 3 or 3, the MCU of the node that mediates sometimes is main, sometimes be from, see it is with respect to which MCU.MCU1 → MCU2 → MCU3 for example, between MCU1 → MCU2, MCU2 be from, between MCU2 → MCU3, MCU2 is main.
Point-to-point and principal and subordinate's Mixed cascading refers to: in the subtended conference, by point-to-point cascade, pass through principal and subordinate's cascade before some meeting between some meeting.
Initiator refers to: certain participant of subtended conference, the data of oneself (video, audio frequency etc.) are broadcasted away, and so that the participant of whole subtended conference can see, hear, this participant is called initiator.
Target choosing sees that end refers to: select a participant among the participant of initiator from subtended conference, the data (video, audio frequency etc.) of watching this selecteed participant are broadcasted participant that the end choosing sees and are called the target choosing and see end.
Locally broadcast refers to: the scope of broadcasting is in active conference, and cascade port not conference participation is transmitted.
Local choosing is seen and referred to: initiator is selected a participant from the meeting at its place, watch this selecteed participant's data (video, audio frequency etc.), does not select the participant's who sees the affiliated meeting of cascade port data (video, audio frequency etc.).
Overall situation broadcasting refers to: the participant that the data of initiator (video, audio frequency etc.) not only are broadcasted end place meeting watches, hears, and the participant of conference cascade mouth place meeting can both watch, hear, the participant of whole subtended conference can both watch, hear then.
Overall situation choosing is seen and referred to: the participant that the initiator choosing is seen is not limited to the participant of initiator place meeting, can also be other participant under the cascade port, and the participant of whole subtended conference can selectedly see.
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
The flow chart of the subtended conference implementation method that Fig. 1 provides for one embodiment of the invention, this subtended conference implementation method comprises following flow process:
The cascading topological structure of S101, configuration subtended conference.This step mainly is summarised as: the cascading topological structure that configures subtended conference to be held, and based on this cascading topological structure each Meeting Held is got up, formation is based on the subtended conference of this topological structure, before configuration wait the cascading topological structure of the subtended conference of holding after subtended conference is held, just become the cascading topological structure of subtended conference.
Concrete, this step can comprise following flow process:
S101a, user are in the number of management center server according to predetermined participant, and the relation between the participant, configure the cascading topological structure of subtended conference to be held, this cascading topological structure can be: point-to-point cascade, principal and subordinate's cascade or, the pattern of point-to-point and principal and subordinate's Mixed cascading.
Cascading topological structure as shown in Figure 2, wherein A, B, C, D, E, F represent respectively a meeting to be held, line between the meeting to be held represents the path between the meeting, between the present embodiment hypothesis C and the B, be point-to-point cascade between D and the B, between A and the B, between A and the F, between B and the E, be principal and subordinate's cascade between E and the F, so shown in Figure 2 is the subtended conference of Mixed cascading pattern, and has formed the ABEF loop.This topological structure also can be used for representing holding a meeting respectively MCU of A, B, C, D, E, F
A, MCU
B, MCU
C, MCU
D, MCU
E, MCU
FBetween cascading topological structure.
S101b, from the cascading topological structure of subtended conference described to be held, find out a top layer meeting, take described top layer meeting as root node, the cascading topological structure of subtended conference described to be held is converted to the second tree topology, and other meetings are corresponding one by one with other nodes of described the second tree topology in the subtended conference described to be held.Being converted to after the second tree topology, not changing point-to-point, principal and subordinate's cascade connection between the meeting that configures among the S101a, only is the loop (such as the ABEF loop among Fig. 2) of removing in the cascading topological structure, so that the path between any two meetings is unique.
The top layer meeting refers to the meeting without any main meeting, such as the not main meeting of the C among Fig. 2, D, A, so all can be used as the top layer meeting.And since B be A from meeting, so B can not be as the top layer meeting, E be B from meeting, so E can not be as the top layer meeting and since F be E, A from meeting, so F can not be as the top layer meeting.Suppose that the cascading topological structure that configures among the S101a is shown in Figure 2, can from C, D, A, choose a root node as the second tree topology wantonly among the S101b so.Suppose take A as root node, the second tree topology that so cascading topological structure shown in Figure 2 is converted to is shown in Fig. 3 a, Fig. 3 b, Fig. 3 c, wherein, Fig. 3 a, Fig. 3 b are the second tree topology that degree of depth traversal forms, and Fig. 3 c is the second tree topology that the level traversal forms.No matter take which kind of mode to convert the second tree topology to, be converted to after the second tree topology, do not change point-to-point between the meeting that configures among the S101a, principal and subordinate's cascade connection, it only is the loop (such as the ABEF loop among Fig. 2) of removing in the cascading topological structure, so that the path between any two meetings is unique, that is to say in the second tree topology, between C and the B, it still is point-to-point cascade between D and the B, between A and the B, between A and the F, between B and the E, it still is principal and subordinate's cascade between E and the F, cascade connection can not change, the second tree topology only is the loop (such as the ABEF loop among Fig. 2) of removing in the cascading topological structure, so that the path between any two meetings is unique.
S101c, according to described the second tree topology, give topological relation corresponding to configuration between the MCU wait to hold each meeting.Because, be converted to after the second tree topology, do not change the cascade connection between the meeting that configures among the S101a, therefore, this step gives the cascade connection wait to hold between the meeting that configures among the topological relation that configures between the MCU of each meeting and the step S101a consistent.
The concrete configuration mode is as follows: the master-slave negotiation random value is given in corresponding meeting to each node of the second tree topology, because the NE type value of MCU is identical, therefore determine the master-slave negotiation random value of giving for the user of master slave relation between the MCU, the principle of each node in the second tree topology being given the master-slave negotiation random value is: when two nodes are point-to-point cascade connection, give identical random value; When two nodes were principal and subordinate's cascade connection, according to level and the master slave relation of tree, every decline or rising one deck added 1 as the random value of main meeting, subtract 1 as the random value from meeting.Can guarantee like this in the process that communication link is set up, hierarchical structure in strict accordance with tree negotiates master slave relation or point-to-point relation between meeting and the meeting and the configuration consistency among the master slave relation between meeting and the meeting, point-to-point relation and the S101a.
Take the second tree topology shown in Fig. 3 a as example, according to mentioned above principle, suppose to root node (MCU
A) give random value N, the B that lower one deck node is corresponding be A from meeting, give so MCU
BGive random value N-1, descend C corresponding to one deck node, D and E again and since E be B from meeting, give so MCU
EGiving random value N-2, is point-to-point cascade between C, D and the B, therefore give MCU
C, MCU
DGive respectively and MCU
BIdentical random value, namely N-1 descends F corresponding to one deck node again since F be E from meeting, give so MCU
FGive random value N-3.Give after the random value according to mentioned above principle, the cascade connection between each meeting of being determined by the size of random value is still constant.
S101d, from the root node of described the second tree topology, according to from top to bottom, from left to right order holds each meeting in described the second tree topology successively.After the Meeting Held, from the root node of tree, from top to bottom, set up communication link, comprise the communication link between MCU and terminal, MCU and the MCU.Before configuration wait the cascading topological structure of the subtended conference of holding after subtended conference is held, just become the cascading topological structure of subtended conference.Preferably, only hold 1 meeting on the same MCU.
The process of step S101 configuration cascading topological structure, the difference of holding process with common conference is, holding of meeting is orderly, and give random value by predetermined principle so that in the process of master-slave negotiation, can be correct negotiate master slave relation, and the holding in the process of common conference, the process of holding of each meeting is independently, and giving of random value is random, uncontrollable master slave relation.
S102, the cascading topological structure of described subtended conference is converted to the first tree topology, the meeting of initiating the initiator place of overall situation broadcasting is the root node of described the first tree topology, and other meetings are corresponding one by one with other nodes of described the first tree topology in the described subtended conference.The initiator of initiating overall situation broadcasting can be the arbitrary terminal in arbitrary meeting in the subtended conference, and is different according to the meeting at the initiator place of initiating overall situation broadcasting, and the first tree topology is also different.Be converted to after the first tree topology, equally, not changing point-to-point, principal and subordinate's cascade connection between the meeting that configures among the S101, only is the loop (such as the ABEF loop among Fig. 2) of removing in the cascading topological structure, so that the path between any two meetings is unique.
Suppose that the cascading topological structure that configures among the S101 is shown in Figure 2, and the initiator of initiating overall situation broadcasting is a terminal among the meeting B, so among the S102 with the root node of B as the first tree topology, the first tree topology that cascading topological structure shown in Figure 2 is converted to is shown in Fig. 4 a, Fig. 4 b.No matter take which kind of mode to convert the second tree topology to, be converted to after the second tree topology, do not change point-to-point, principal and subordinate's cascade connection between the meeting that configures among the S101, only be the loop (such as the ABEF loop among Fig. 2) of removing in the cascading topological structure, so that the path between any two meetings is unique.
S103, from the corresponding meeting of described root node, according to the level of described the first tree topology, the content that described initiator is broadcasted is broadcasted step by step.
Preferably, the mode that step S103 takes overall situation broadcasting to be split into a plurality of locally broadcasts realizes, is specifically as follows:
Step B1, carry out locally broadcast in the corresponding meeting of described root node;
Lower one deck node of step B2, traversal the first tree topology; If this time one deck has a plurality of nodes, carry out so respectively the operation of step B3;
Step B3, respectively in the corresponding meeting of each node on described lower one deck, the cascade port of last layer node is carried out locally broadcast as initiator, after each node of this layer all finished locally broadcast, judge whether to exist to descend again one deck node, if exist, then enter step B2, otherwise, process ends.
Take the first tree topology shown in Fig. 4 a as example, the initiator of initiating overall situation broadcasting is a terminal among the meeting B, and step S103 is specifically as follows:
Step B1 ', carry out locally broadcast at meeting B;
Step B2 ', in meeting C, D, E, respectively with the cascade port of meeting B as initiator, carry out locally broadcast;
Step B3 ', in meeting F, the cascade port of meeting E as initiator, is carried out locally broadcast;
Step B4 ', in meeting A, the cascade port of meeting F as initiator, is carried out locally broadcast.
In another embodiment of the present invention, also comprise: step 104, initiator carry out overall situation choosing in subtended conference sees.In the process of carrying out overall situation broadcasting, obtain after the first tree topology, can know that the path between any 2 meetings all is unique, do not have loop, that is to say, the meeting of initiator place and target choosing see between the meeting of holding the place to only have unique path to arrive at.Therefore in carrying out the process that overall situation choosing sees, at first need to obtain the place meeting of overall initiator and see the path of holding between the meeting of place with the target choosing.Overall situation choosing is seen and can be may further comprise the steps:
Step C1, obtain initiator place meeting described in described the first tree topology and see path between the end place meeting to target choosing;
Step C2, according to the level in the path that gets access to, the selected content of seeing from end place meeting is seen in described target choosing, is successively selected to the place meeting of described initiator and to be seen operation.
Preferably, step 104 specifically can comprise following flow process:
Step C11, the meeting of initiator place is pressed into stack top;
Step C12, search and whether exist the choosing of described target to see end in the stack top meeting, then obtain the path by end if exist described target choosing to see, enter step C21; If do not exist described target choosing to see end, then judge whether to exist lower one deck node, if exist, then enter step C13, then do not enter step C14 if do not exist;
Step C13, meeting corresponding to arbitrary node on described lower one deck is pressed into stack top, enters step C12;
Step C14, stack is ejected in the meeting of current stack top, judge and eject whether stack is empty behind the stack, if then flow process finishes; If stack is not empty, then enter step C15;
Step C15, judge whether to exist with the meeting of being popped with layer and be not pressed into the sibling of stack, if exist, then will be pressed into stack with meeting corresponding to arbitrary sibling that be not pressed into stack in the layer, enter step C12, if do not have the node with layer, then enter step C14.
Step C21, in the stack top meeting, carry out part choosing and see operation;
Step C22, meeting is ejected from stack top, the meeting that once is pressed into stack top before so is exactly new stack top, and the cascade port that is ejected meeting is seen end as the choosing of new stack top, carries out part choosing and sees operation, until stack is sky.
Take the first tree topology shown in Fig. 4 a as example, the initiator of initiating overall situation broadcasting is a terminal among the meeting B, and the target choosing sees that end is a terminal among the meeting F, and step 104 specifically can comprise following flow process:
Step C11 ', meeting B is pressed into stack top;
Step C12 ', search and whether exist target choosing to see end among the stack top meeting B, because the target choosing is seen end and is a terminal among the meeting F, therefore search among the stack top meeting B less than, then judge and whether have lower one deck node under the meeting B, owing to there being lower one deck node (C, D, the sibling that E is corresponding), meeting corresponding to arbitrary node on described lower one deck is pressed into stack top, supposes meeting E is pressed into stack top, then enter step C13 ';
Step C13 ', search and whether exist target choosing to see end among the meeting E, because target choosing sees end and is a terminal among the meeting F, thus search among the stack top meeting E less than, then judge whether there is lower one deck node under the meeting E, owing to having lower one deck node F, then carrying out step C14 ';
Step C14 ', meeting F corresponding to described lower one deck node is pressed into stack top, search and whether exist target choosing to see end among the meeting F, be a terminal among the meeting F because end is seen in the target choosing, so can find among the stack top meeting F, return path B → D → E → F enters step C21 ';
Step C21 ', in the stack top meeting, carry out part choosing and see operation; Because stack top meeting this moment is F, so this step carries out part with exactlying and selects and see operation in F, operates to enter step C22 ' after finishing;
Step C22 ', meeting F is ejected from stack top, the meeting E that once is pressed into stack top before so is exactly new stack top, and the cascade port that is ejected meeting F is seen end as the choosing of new stack top meeting E, carries out part choosing and sees operation, operates to enter step C23 ' after finishing;
Step C23 ', meeting E is ejected from stack top, the meeting B that once is pressed into stack top before so is exactly new stack top, and the cascade port that is ejected meeting E is seen end as the choosing of new stack top meeting B, carries out part choosing and sees operation, operates to enter step C24 ' after finishing;
Step C24 ', meeting B is ejected from stack top, stack is empty, and flow process finishes.
The present invention also provides a kind of subtended conference to realize system, and this system can be arranged on management center server, each MCU that this management center server management is held a meeting.The subtended conference that Fig. 5 provides for one embodiment of the invention is realized the schematic diagram of system, as shown in Figure 5, this subtended conference realization system comprises that the first tree topology sets up module 51 and overall Broadcasting Control module 52, wherein, the cascading topological structure of subtended conference comprises point-to-point cascade, principal and subordinate's cascade, perhaps point-to-point and principal and subordinate's Mixed cascading.
The first tree topology is set up module 51 and is used for the cascading topological structure of described subtended conference is converted to the first tree topology, the meeting of initiating the initiator place of overall situation broadcasting is the root node of described the first tree topology, and other meetings are corresponding one by one with other nodes of described the first tree topology in the described subtended conference.The initiator of initiating overall situation broadcasting can be the arbitrary terminal in arbitrary meeting in the subtended conference, and is different according to the meeting at the initiator place of initiating overall situation broadcasting, and the first tree topology is also different.Be converted to after the first tree topology, equally, not changing point-to-point, principal and subordinate's cascade connection between the meeting in the front cascading topological structure of conversion, only is the loop (such as the ABEF loop among Fig. 2) of removing in the cascading topological structure, so that the path between any two meetings is unique.
Overall situation Broadcasting Control module 52 is used for according to the level of described the first tree topology, the content that described initiator is broadcasted successively being broadcasted from the corresponding meeting of described root node.Preferably, overall Broadcasting Control module 52 carries out that successively broadcast mode can be with reference to above-mentioned steps B1 to B3.
Further, this subtended conference realizes that system comprises that also overall situation choosing sees control module 53, is used for described initiator and carries out the overall situation at described subtended conference and select and see.Preferably, overall situation choosing sees that control module 53 may further include path acquisition module 531 and control submodule 532 is seen in overall situation choosing, wherein
Path acquisition module 531 is used for obtaining initiator place meeting described in described the first tree topology and sees the path of holding between the meeting of place to the target choosing.Preferably, path acquisition module 531 carry out mode that the path obtains can be with reference to above-mentioned steps C11 to C13.
Overall situation choosing sees that control submodule 532 is used for the levels in the path that gets access to according to path acquisition module 531, and the selected content of seeing from end place meeting is seen in described target choosing, is successively selected to the place meeting of described initiator and to be seen operation.Preferably, overall situation choosing see mode that overall situation choosing sees is carried out in path that control submodule 532 gets access to according to path acquisition module 531 can be with reference to above-mentioned steps C21 to C22.
Further, this subtended conference realizes that system comprises that also cascading topological structure configuration module 54, the second tree topology set up module 55, Multipoint process cell location module 56 and subtended conference and hold module 57, wherein:
Cascading topological structure configuration module 54 is used for configuring the cascading topological structure of subtended conference to be held; Concrete, be used for the user according to predetermined participant's number, reach the relation between the participant, configure the cascading topological structure of subtended conference to be held, described cascading topological structure can be: point-to-point cascade, principal and subordinate's cascade or, the pattern of point-to-point and principal and subordinate's Mixed cascading.
The second tree topology is set up module 55 and is used for finding out a top layer meeting from the cascading topological structure of subtended conference described to be held, take described top layer meeting as root node, the cascading topological structure of subtended conference described to be held is converted to the second tree topology, and other meetings are corresponding one by one with other nodes of described the second tree topology in the subtended conference described to be held.Be converted to after the second tree topology, do not change point-to-point, principal and subordinate's cascade connection between the meeting that cascading topological structure configuration module 54 configures, only be the loop (such as the ABEF loop among Fig. 2) of removing in the cascading topological structure, so that the path between any two meetings is unique.The top layer meeting refers to the meeting without any main meeting, such as the not main meeting of the C among Fig. 2, D, A, so all can be used as the top layer meeting.
Multipoint process cell location module 56 is used for according to described the second tree topology, to topological relation corresponding to configuration between the Multipoint process unit of each meeting to be held.Because, be converted to after the second tree topology, do not change point-to-point, principal and subordinate's cascade connection between the meeting that cascading topological structure configuration module 54 configures, therefore, this step is consistent with the cascade connection between the meeting that cascading topological structure configuration module 54 configures to waiting to hold the topological relation that configures between the MCU of each meeting.
Subtended conference is held module 57 and is used for from the root node of described the second tree topology, according to from top to bottom, from left to right order holds each meeting in described the second tree topology successively.After the Meeting Held, from the root node of tree, from top to bottom, set up communication link, comprise the communication link between MCU and terminal, MCU and the MCU.Before cascading topological structure configuration module 54 configuration wait the cascading topological structure of the subtended conference of holding after subtended conference is held, just become the cascading topological structure of subtended conference.Preferably, only hold 1 meeting on the same MCU.
Subtended conference implementation method provided by the invention and system, MCU that can compatible each different vendor, only need manufacturer that MCU API control interface agreement is provided, the concrete agreement (H.320 H323 SIP) of holding a meeting with MCU is irrelevant, supports overall situation broadcasting under the pattern of point-to-point cascade (claiming again simple cascade), principal and subordinate's cascade, point-to-point and principal and subordinate's Mixed cascading and the overall situation to select and sees.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (11)
1. subtended conference implementation method, the cascading topological structure of described subtended conference comprises point-to-point cascade, principal and subordinate's cascade, and perhaps point-to-point and principal and subordinate's Mixed cascading is characterized in that, and described subtended conference implementation method comprises:
Steps A, the cascading topological structure of described subtended conference is converted to the first tree topology, the meeting of initiating the initiator place of overall situation broadcasting is the root node of described the first tree topology, and other meetings are corresponding one by one with other nodes of described the first tree topology in the described subtended conference;
Step B, from the corresponding meeting of described root node, according to the level of described the first tree topology, the content that described initiator is broadcasted is successively broadcasted.
2. subtended conference implementation method as claimed in claim 1 is characterized in that, described step B is specially:
Step B1, carry out locally broadcast in the corresponding meeting of described root node;
Lower one deck node of step B2, described the first tree topology of traversal;
Step B3, respectively in the corresponding meeting of each node on described lower one deck, the cascade port of last layer node is carried out locally broadcast as initiator, after each node of this layer all finished locally broadcast, judge whether to exist to descend again one deck node, if exist, then enter step B2, otherwise, process ends.
3. subtended conference implementation method as claimed in claim 1 is characterized in that, also comprises: step C, described initiator carry out overall situation choosing in described subtended conference sees.
4. subtended conference implementation method as claimed in claim 1 is characterized in that, described step C comprises:
Step C1, obtain initiator place meeting described in described the first tree topology and see path between the end place meeting to target choosing;
Step C2, according to the level in the path that gets access to, the selected content of seeing from end place meeting is seen in described target choosing, is successively selected to the place meeting of described initiator and to be seen operation.
5. subtended conference implementation method as claimed in claim 4 is characterized in that, described step C1 is specially:
Step C11, the place meeting of described initiator is pressed into stack top;
Step C12, search and whether exist the choosing of described target to see end in the stack top meeting, then obtain the path by end if exist described target choosing to see; If do not exist described target choosing to see end, then judge whether to exist lower one deck node, if exist, then enter step C13, then do not enter step C14 if do not exist;
Step C13, meeting corresponding to arbitrary node on described lower one deck is pressed into stack top, enters step C12;
Step C14, stack is ejected in the meeting of current stack top, judge and eject whether stack is empty behind the stack, if then flow process finishes; If stack is not empty, then enter step C15;
Step C15, judge whether to exist with the meeting of being popped with layer and be not pressed into the sibling of stack, if exist, then will be pressed into stack with meeting corresponding to arbitrary sibling that be not pressed into stack in the layer, enter step C12, if do not have the node with layer, then enter step C14.
6. subtended conference implementation method as claimed in claim 5 is characterized in that, described step C2 is specially:
Step C21, in the stack top meeting, carry out part choosing and see operation;
Step C22, meeting is ejected from stack top, the cascade port that is ejected meeting is seen end as the choosing of new stack top, carry out part choosing and see operation, until stack is sky.
7. subtended conference implementation method as claimed in claim 1 is characterized in that, before described steps A, also comprises:
Configure the cascading topological structure of subtended conference to be held;
From the cascading topological structure of subtended conference described to be held, find out a top layer meeting, take described top layer meeting as root node, the cascading topological structure of subtended conference described to be held is converted to the second tree topology, and other meetings are corresponding one by one with other nodes of described the second tree topology in the subtended conference described to be held;
According to described the second tree topology, give topological relation corresponding to configuration between the Multipoint process unit wait to hold each meeting;
From the root node of described the second tree topology, according to from top to bottom, from left to right order holds each meeting in described the second tree topology successively.
8. a subtended conference is realized system, the cascading topological structure of described subtended conference comprises point-to-point cascade, principal and subordinate's cascade, perhaps point-to-point and principal and subordinate's Mixed cascading, it is characterized in that, described subtended conference realization system comprises that the first tree topology sets up module and overall Broadcasting Control module, wherein
Described the first tree topology is set up module and is used for the cascading topological structure of described subtended conference is converted to the first tree topology, the meeting of initiating the initiator place of overall situation broadcasting is the root node of described the first tree topology, and other meetings are corresponding one by one with other nodes of described the first tree topology in the described subtended conference;
Described overall Broadcasting Control module is used for according to the level of described the first tree topology, the content that described initiator is broadcasted successively being broadcasted from the corresponding meeting of described root node.
9. subtended conference as claimed in claim 8 is realized system, it is characterized in that, described subtended conference realizes that system comprises that also overall situation choosing sees control module, is used for described initiator and carries out the overall situation at described subtended conference and select and see.
10. subtended conference as claimed in claim 8 is realized system, it is characterized in that, described overall situation choosing sees that control module comprises that path acquisition module and overall situation choosing see the control submodule, wherein,
Described path acquisition module is used for obtaining initiator place meeting described in described the first tree topology and sees the path of holding between the meeting of place to the target choosing;
Described overall situation choosing sees that the control submodule is used for the level in the path that gets access to according to described path acquisition module, and the selected content of seeing from end place meeting is seen in described target choosing, is successively selected to the place meeting of described initiator and to be seen operation.
11. subtended conference as claimed in claim 8 is realized system, it is characterized in that, described subtended conference realizes that system comprises that also cascading topological structure configuration module, the second tree topology set up module, Multipoint process cell location module and subtended conference and hold module, wherein:
Described cascading topological structure configuration module is used for configuring the cascading topological structure of subtended conference to be held;
Described the second tree topology is set up module and is used for finding out a top layer meeting from the cascading topological structure of subtended conference described to be held, take described top layer meeting as root node, the cascading topological structure of subtended conference described to be held is converted to the second tree topology, and other meetings are corresponding one by one with other nodes of described the second tree topology in the subtended conference described to be held;
Described Multipoint process cell location module is used for according to described the second tree topology, gives topological relation corresponding to configuration between the Multipoint process unit of waiting to hold each meeting;
Described subtended conference is held module and is used for from the root node of described the second tree topology, according to from top to bottom, from left to right order holds each meeting in described the second tree topology successively.
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