CN100474814C - Method for controlling flow transferring direction of end point down medium - Google Patents
Method for controlling flow transferring direction of end point down medium Download PDFInfo
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- CN100474814C CN100474814C CNB031552064A CN03155206A CN100474814C CN 100474814 C CN100474814 C CN 100474814C CN B031552064 A CNB031552064 A CN B031552064A CN 03155206 A CN03155206 A CN 03155206A CN 100474814 C CN100474814 C CN 100474814C
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Abstract
The method includes following step: the transmission direction of media flow under the control terminal based on MGCP is set, the above terminal controls transmission direction of media flow according to the set transmission direction of media flow. The invention implements the control of transmission direction of media flow between any connections in terminal in MOCP.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of method of controlling Media Stream direction of transfer under the end points.
Background technology
MGCP (MGCP) is a kind of principal and subordinate's control protocol that is widely used in the communication network, MGC in the network (Media Gateway Controller) carries out control and management based on MGCP to MG (media gateway), MG realizes voice communication according to the order that MGC sends between each MG, MGC mainly finishes service control function, promptly promptly can finish the formulation of miscellaneous service, and MG mainly finishes the processing capacity of Media Stream in the MGC side.
MGCP adopt by end points with connect and compose based on the call model that is connected, and the application calling manages connection, one based on creating a plurality of connections under the end points of MGCP, each user who is generally under the end points sets up a connection, i.e. corresponding connection of user, one or more connections can belong to same calling, MGCP stipulated to end points be connected the pattern that manages.
Based on above-mentioned call model, in MG, can provide the Multi-Party Conference function, be that multi-party users is conversed by the end points based on MGCP simultaneously, the end points that provides Multi-Party Conference to insert is commonly referred to meeting bridge end points, MG can be between the user under meeting bridge end points and the meeting bridge end points, set up a plurality of the connection between other meeting bridge end points under the same MG and between the meeting bridge end points under other MG, carries out the transmission of Media Stream.After the Media Stream that connects from each is sent to meeting bridge end points, pass through respectively to send corresponding the connection, realize the Multi-Party Conference function by meeting bridge end points.It all is that other connect the mixing of media streams that sends on this end points that on the meeting bridge end points any one connects the Media Stream that receives, can be set to receive only or only send Media Stream in the connection, but can't select to receive only part and connect the Media Stream that sends, do not connect the Media Stream that sends and do not receive other, promptly can not control the Media Stream direction between a plurality of connections on the meeting bridge end points well.
For example, as shown in Figure 1, user A, user B and user C realize the tripartite talks business, connect one for user A creates on meeting bridge end points, and user B creates and connects two, and user C creates and connects three.Now define Ai for connecting one receiving media stream, the Media Stream of Ao for sending in the connection one; Bi is for connecting two receiving media stream, the Media Stream of Bo for sending in the connection two; Ci is for connecting three receiving media stream, and Co is for connecting the Media Stream that sends on three, then: Ao=Bi+Ci, Bo=Ai+Ci, Co=Ai+Bi.
Like this, the user A among Fig. 1 just can hear the sound of user B and user C; User B just can hear the sound of user A and user C; User A just can hear the sound of user B and user C, is free to talk between user A, user B and user C.
But consider actual needs, may need the talk between the restricted part user sometimes, for example, at Fig. 1, need the talk of limited subscriber A and user B, user C and user A and user B can talk freely, even: Ao=Ci, Bo=Ci, Co=Ai+Bi.For this requirement, present MGCP of the prior art can't realize, because existing MGCP technology does not provide the method for the Media Stream direction of transfer between control connection.
At present, although another kind is called the method that the MGCP of H248 agreement provides Media Stream direction of transfer between control connection, but because MGCP extensive use, if in MGC and MG equipment, the MGCP agreement is replaced with the H248 agreement, to pay the cost of great number so, this is that network operation is undesirable for this reason.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of method of controlling Media Stream direction of transfer under the end points, to realize to control based on Media Stream direction under the end points of MGCP.
The objective of the invention is to adopt following scheme to realize:
Described a kind of method of controlling Media Stream direction of transfer under the end points comprises:
A, for to determine connection identifier based on the connection that each user set up under the end points of MGCP, determine Media Stream path between each user to be respectively the Media Stream channel setting Media Stream direction of transfer between each user according to described connection identifier;
B, based on the end points of MGCP Media Stream direction of transfer according to described setting, the direction of transfer of the Media Stream of process is controlled.
The direction of transfer of described Media Stream comprises:
Media Stream is in two-way transmission on the Media Stream path between the user: Media Stream can two-way transmission between described Media Stream path two end subscribers;
Media Stream is in one-way transmission on the Media Stream path between the user: Media Stream only can be pressed single direction and transmit between described Media Stream path two end subscribers;
Media Stream path between the user does not allow Media Stream to transmit: Media Stream cannot transmit between described Media Stream path two end subscribers.
Described step a also comprises:
When being a new user when creating a new connection on based on the end points of MGCP, existed the Media Stream direction default setting between being connected to be on described new connection and this end points: Media Stream two-way transmission on the Media Stream path between the user.
Described step b comprises:
End points based on MGCP receives the Media Stream that the user sends;
According to the connection identifier that this user connected, determine the Media Stream direction of transfer of the Media Stream path between each user corresponding with it;
The Media Stream that the user is sent sends according to the Media Stream direction of transfer of determining.
Described step a comprises: the direction that is provided with based on the Media Stream between connecting on the end points of MGCP based on MGCP is topology, and the topology of the Media Stream direction between connecting on end points be the set of Media Stream direction between connection on this end points.
Method based on Media Stream direction of transfer under the MGCP control end points also comprises step c:
C, adjust set Media Stream direction of transfer under the end points based on MGCP by the MGCP packet of expansion.
Described step c comprises: by the control of MGCP packet and the topology of operating the Media Stream direction between described connection of expansion.
Described step c further comprises:
C1, determine to need adjust the Media Stream direction of transfer based on the connection between the user under the end points of MGCP;
C2, MGC (Media Gateway Controller) determine the direction of transfer of the Media Stream in the connection between adjusted described user, and it is carried in the MGCP packet of expansion sends to MG (gateway);
C3, MG adjust the Media Stream direction of transfer on the Media Stream path between the user according to the MGCP packet of described expansion.
The content of the MGCP packet carrying of described expansion comprises: packet name, signal name and signal parameter, wherein said signal parameter are the Media Stream direction of transfer on the Media Stream path between adjusted user.
Described step c3 comprises:
MG adjusts the Media Stream direction of transfer on the Media Stream path between the user according to the MGCP packet of described expansion;
If adjust successfully, then MG sends the message of correct response to MGC;
If adjust failure, then MG sends the message of errored response to MGC.
By technical scheme that the invention described above provided as can be seen, in the present invention by carrying out the setting of corresponding Media Stream direction on based on the end points of MGCP, and carry out the transmission of Media Stream according to the Media Stream direction that is provided with, thereby realized control based on Media Stream direction between each connects on the end points of MGCP, make MGC can utilize the characteristics of MGCP that the more business tine of horn of plenty is provided in network, control the Media Stream direction of transfer between any two connections under the end points based on MGCP effectively.For example, user A and cannot the conversing of user B of restriction among Fig. 1, or the conversation of limited subscriber A and user B is one-way traffic, or the like.Realization of the present invention makes Web conference can realize more rich functions, thereby can satisfy the demand of the multiple personalization of more users.
Description of drawings
Fig. 1 is a Multi-Party Conference networking structure schematic diagram;
Fig. 2 is the specific embodiment of the present invention flow chart;
Fig. 3 is the streamed schematic diagram of two-way media among the present invention;
Fig. 4 is first kind of streamed schematic diagram of one-way media among the present invention;
Fig. 5 is second kind of streamed schematic diagram of one-way media among the present invention;
The schematic diagram that Fig. 6 is set to isolate for Media Stream direction of transfer among the present invention;
Fig. 7 is the Media Stream direction of transfer schematic diagram that the present invention is based on Fig. 1;
Fig. 8 is the Media Stream direction of transfer schematic diagram of example one among the present invention;
Fig. 9 is the Media Stream direction of transfer schematic diagram of example two among the present invention.
Embodiment
Now the embodiment based on the method for Media Stream direction of transfer under the MGCP control end points of the present invention is described further in conjunction with the accompanying drawings.
Method provided by the present invention is not change the end points link model of MGCP, and guarantees to connect based on the end points of MGCP under each and realize under the situation that communication all meets the MGCP standard.
Specific implementation process of the present invention referring to Fig. 2, comprising:
Step 1: in MG, determine based on a plurality of users under the end points of MGCP;
In MG, be connected with a plurality of users under each end points, converse by this end points between a plurality of users, with functions such as realization Multi-Party Conferences based on MGCP;
Described a plurality of user comprises: the end points based on MGCP in actual user, other end points based on MGCP in the Home Network (i.e. other end points based on MGCP in this MG) and other networks, promptly usually in MG based on promptly can directly connecting the user under the end points of MGCP, also can be connected with the user indirectly based on the end points of MGCP or the end points in other networks by other based on MGCP, at this moment, to based on the end points of MGCP as a user treat accordingly, and connection identifier is set for it.
Step 2: determine based on the connection identifier that each user connected under the end points of MGCP;
For example, shown in Figure 1, user A, user B and user C need realize the tripartite talks business, at the end points of MG based on MGCP, promptly connect one for user A creates on the meeting bridge end points, connection identifier is: ConnId1; Connect two for user B creates on meeting bridge end points, connection identifier is: ConnId2; Connect three for user C creates on meeting bridge end points, connection identifier is: ConnId3.
Step 3: according to the connection identifier of determining that each user connected, in MG for to be provided with based on the Media Stream direction of transfer under the end points of MGCP;
At first, determine a Media Stream path between each user according to described connection identifier, promptly determine the Media Stream path of per two users between connecting according to described connection identifier, be equivalent to a Media Stream path between two users, for example, user A can be defined as (ConnId1 according to the connection identifier that is connected with the connection identifier that is connected two with Media Stream path between user B, ConnId2), connect two and can be defined as (ConnId2 with the Media Stream path that is connected three, ConnId3), then, determine Media Stream direction of transfer on the described Media Stream path;
Described Media Stream direction of transfer can be set to respectively:
Bothway (two-way) transmits: as described in the example in the step 2, if two connections are arranged, the connection identifier of connection one is ConnId1, connect two the ConnId2 that is designated, connection one is that bothway (two-way) is meant that connecting one can receive connection two Media Streams that send, and connects two and also can receive connection one Media Stream that sends with the Media Stream direction that is connected two; Usually can adopt following syntactic description: bothway (ConnId1, ConnId2), as shown in Figure 3;
Oneway (unidirectional) transmits: connect one when being connected Media Stream direction of transfer between two and being set to OneWay (unidirectional), comprise two kinds of situations, a kind of situation can not receive connection two Media Streams that send for connecting one, connect two and can receive connection one Media Stream that sends, usually can adopt following syntactic description: OneWay (ConnId1, ConnId2), as shown in Figure 4; Another kind of situation can not receive connection one Media Stream that sends for connecting two, and connection one can receive and connect two Media Streams that send; Can adopt following syntactic description: OneWay (ConnId2, ConnId1) as shown in Figure 5;
Isolate (isolating) transmits: when connecting one when being set to Isolate (isolating) with the Media Stream direction of transfer that is connected two, be meant that connecting one can not receive connection two Media Streams that send, connect two and can not receive connection one Media Stream that sends, the user A that promptly connects a correspondence connects with connecting not exist to call out between the two corresponding user B, usually can adopt following syntactic description: Isolate (ConnId1, ConnId2), as shown in Figure 6;
According to the definition of MGCP and the definition of the Media Stream direction between above-mentioned two connections, when creating new a connection on an end points, having had the Media Stream direction default setting between being connected on this new connection and this end points is bothway (two-way);
The present invention defined on the MG one based on the end points of MGCP on Topology (topology) relation of each Media Stream direction of transfer between connecting, it is the set of Media Stream direction of transfer between per two connections on the end points based on MGCP that described Topology (topology) closes, be that described Topology (topology) relation has been determined the Media Stream that can receive in any one user set up on this end points the connection, and institute's receiving media stream come from those connections on this end points; Determined that simultaneously any one connects the Media Stream of going up transmission on this end points, will be sent in those connections of this end points.
When the end points based on MGCP on the step 4:MG is received the Media Stream that the user sends, direction of transfer according to the set Media Stream of the connection identifier finding step 3 of the connection of this user's correspondence, with definite which connection this Media Stream can be sent in, and send by corresponding connection.
Realized effective control through the process of above-mentioned steps 1 based on Media Stream direction of transfer under the end points of MGCP to step 4.But the set Media Stream direction of transfer based under the end points of MGCP of step 3 is not unalterable, usually need to revise dynamically according to the needs of actual conditions at any time, therefore, the present invention also comprises the processing procedure that above-mentioned setting is dynamically changed, and detailed process is as follows:
The present invention is the MGCP packet by an expansion, control and Topology (topology) between operation is connected on the end points, so that the Media Stream direction of transfer based on the end points setting of MGCP is made amendment, the content of carrying in the MGCP packet of described expansion comprises: the packet name, signal name and signal parameter, described packet name has determined to carry a particular data packet of this signal and signal parameter, described signal is used for MG and determines the Media Stream direction of transfer between connection on the needs change end points according to this signal name, described signal parameter has been described between the connection that needs on the end points to change Media Stream direction of transfer new on the Media Stream path, the Media Stream direction of transfer between two connections listing in institute's parameter not, the Media Stream direction of transfer between then connecting does not change.When MGC (gateway controller) sends a command to MG, require MG on an end points, to carry out this signal, MG changes the Media Stream direction of transfer between connection on the end points according to signal parameter, and after running succeeded, sends the message of correct response to MGC; If carry out failure, to the message of MGC transmission errored response, so that MGC knows whether this changes by the description of corresponding signal parameter based on the Media Stream direction of transfer on the end points of MGCP.
At the present invention, now the invention will be further described with the example of Three-Way Calling shown in Figure 1, at end points based on MGCP, be to have created three connections on the meeting bridge end points, based in the background technology to description and the definition of Fig. 1, Ao=Bi+Ci, Bo=Ai+Ci, Co=Ai+Bi, Topology (topology) relation between connecting on the meeting bridge end points is set to: and bothway (ConnId1, ConnId2), bothway (ConnId2, ConnId3), bothway (ConnId1, ConnId3), as shown in Figure 7, connect one, connect two and can transmit alternately, and be not subjected to any restriction with the Media Stream that is connected three.
Based on foregoing description, the concrete application example to control Media Stream direction of transfer on meeting bridge end points is elaborated below:
Example one: according to actual conditions, need want the talk between limited subscriber A and user B, and user C and user A and user B can talk freely, promptly require Ao=Ci, Bo=Ci, Co=Ai+Bi, Topology (topology) relation between then needing to connect on this meeting bridge end points is set to: Isolate (ConnId1, ConnId2), bothway (ConnId2, ConnId3), and bothway (ConnId1, ConnId3), as shown in Figure 8, like this, will transmit according to the Media Stream that Topology (topology) relation of configuration is sent each connection at meeting bridge end points, can be thereby realized according to the needs of actual conditions to control based on Media Stream direction of transfer under the end points of MGCP.
Example two: need realize that user A can hear user B sound (being the Media Stream that user A can receive user B) at meeting bridge end points, but user B can not hear the sound of user A, user C utilizes family B can talk (be between user C and user B Media Stream can two-wayly transmit), user C can hear the sound of user A, but user A can not hear the sound of user C, be Ao=Bi, Bo=Ci, Co=Bi+Ai, at this moment, Topology (topology) relation between needing to connect on this end points is set to: and oncway (ConnId2, ConnId1), bothway (ConnId2, ConnId3), and oncway (ConnId1, ConnId3), as shown in Figure 9, the Media Stream direction of transfer that indicates among the figure as can be seen promptly is desired Media Stream direction of transfer.
Example three: this example will describe the Media Stream direction of transfer setting of specifically how revising at meeting bridge end points on MG, promptly how to control and operates based on being connected Topology (topology) relation that is provided with on the end points of MGCP for each.Still the example based on foregoing Three-Way Calling describes, the connection of creating on the meeting bridge end points one, connect two and be connected three at the beginning of establishment, Media Stream direction of transfer between each connects all is provided with or default setting is bothway, now require the talk between user A and user B is limited, and user C and user A and user B can talk freely, i.e. the Ao-Ci of Yao Qiuing, BoCi, the demand of Co=Ai+Bi supposes that the expansion MGCP packet of definition is by name: ConnsTp; Described signal is by name: ModTp; Described signal parameter is by name: Tp; Then the control signaling that issues of MGC is: and S:ConnsTp/ModTp (tp=Isolate (ConnId1, ConnId2), bothway (ConnId2, ConnId3), bothway (ConnId1, ConnId3)); Because in expansion MGCP packet, can only describe the Media Stream direction of transfer setting between the connection that needs change, so the control signaling that MGC issues also can be S:ConnsTp/ModTp (tp=Isolate (ConnId1, ConnId2)).When MG runs succeeded,, like this, just realized the talk of limited subscriber A and user B, the purpose that user C and user A and user B can talk freely to the correct message that responds of MGC loopback.
In sum, this programme provides the method for Media Stream direction of transfer between connecting under end points on the MGC control MG, and the present invention be that measured MGCP realizes, thereby makes MGC can utilize the MGCP agreement that the business of enriching more is provided.
Claims (10)
1, a kind of method of controlling Media Stream direction of transfer under the end points is characterized in that comprising:
A, for to determine connection identifier based on the connection that each user set up under the end points of MGCP, determine Media Stream path between each user to be respectively the Media Stream channel setting Media Stream direction of transfer between each user according to described connection identifier;
B, based on the end points of MGCP Media Stream direction of transfer according to described setting, the direction of transfer of the Media Stream of process is controlled.
2, the method for Media Stream direction of transfer under the control end points according to claim 1 is characterized in that the direction of transfer of described Media Stream comprises:
Media Stream is in two-way transmission on the Media Stream path between the user: Media Stream can two-way transmission between described Media Stream path two end subscribers;
Media Stream is in one-way transmission on the Media Stream path between the user: Media Stream only can be pressed single direction and transmit between described Media Stream path two end subscribers;
Media Stream path between the user does not allow Media Stream to transmit: Media Stream cannot transmit between described Media Stream path two end subscribers.
3, the method for the direction of transfer of Media Stream under the control end points according to claim 2 is characterized in that described step a also comprises:
When being a new user when creating a new connection on based on the end points of MGCP, existed the Media Stream direction default setting between being connected to be on described new connection and this end points: Media Stream two-way transmission on the Media Stream path between the user.
4, the method for the direction of transfer of Media Stream under the control end points according to claim 1 is characterized in that described step b comprises:
End points based on MGCP receives the Media Stream that the user sends;
According to the connection identifier that this user connected, determine the Media Stream direction of transfer of the Media Stream path between each user corresponding with it;
The Media Stream that the user is sent sends according to the Media Stream direction of transfer of determining.
5, the method for Media Stream direction of transfer under the control end points according to claim 1 is characterized in that described step a comprises:
The direction that is provided with based on the Media Stream between connecting on the end points of MGCP based on MGCP be a topology, and the topology of the Media Stream direction between connecting on end points is the set of Media Stream direction between connection on this end points.
6, the method for Media Stream direction of transfer under the control end points according to claim 1 is characterized in that this method also comprises step c:
C, adjust set Media Stream direction of transfer under the end points based on MGCP by the MGCP packet of expansion.
7, the method for Media Stream direction of transfer under the control end points according to claim 6 is characterized in that described step c comprises: by the control of MGCP packet and the topology of operating the Media Stream direction between described connection of expansion.
8, according to the method for Media Stream direction of transfer under claim 6 or the 7 described control end points, it is characterized in that described step c comprises:
C1, determine to need adjust the Media Stream direction of transfer based on the connection between the user under the end points of MGCP;
C2, media gateway controller MGC are determined the direction of transfer of the Media Stream in the connection between adjusted described user, and it is carried in the MGCP packet of expansion sends to gateway MG;
C3, MG adjust the Media Stream direction of transfer on the Media Stream path between the user according to the MGCP packet of described expansion.
9, the method for Media Stream direction of transfer under the control end points according to claim 8, it is characterized in that, the content of the MGCP packet carrying of described expansion comprises: packet name, signal name and signal parameter, wherein said signal parameter are the Media Stream direction of transfer on the Media Stream path between adjusted user.
10, the method for Media Stream direction of transfer under the control end points according to claim 8 is characterized in that described step c3 comprises:
MG adjusts the Media Stream direction of transfer on the Media Stream path between the user according to the MGCP packet of described expansion;
If adjust successfully, then MG sends the message of correct response to MGC;
If adjust failure, then MG sends the message of errored response to MGC.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031552064A CN100474814C (en) | 2003-08-19 | 2003-08-19 | Method for controlling flow transferring direction of end point down medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031552064A CN100474814C (en) | 2003-08-19 | 2003-08-19 | Method for controlling flow transferring direction of end point down medium |
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| CN100474814C true CN100474814C (en) | 2009-04-01 |
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