WO2009097792A1 - 一种建立音频会议连接的方法和装置 - Google Patents

一种建立音频会议连接的方法和装置 Download PDF

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Publication number
WO2009097792A1
WO2009097792A1 PCT/CN2009/070237 CN2009070237W WO2009097792A1 WO 2009097792 A1 WO2009097792 A1 WO 2009097792A1 CN 2009070237 W CN2009070237 W CN 2009070237W WO 2009097792 A1 WO2009097792 A1 WO 2009097792A1
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WIPO (PCT)
Prior art keywords
conference
terminal
node
connection
establishing
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PCT/CN2009/070237
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English (en)
French (fr)
Inventor
Feng Zha
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009097792A1 publication Critical patent/WO2009097792A1/zh
Priority to US12/795,527 priority Critical patent/US20100241721A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40Support for services or applications
    • H04L65/403Arrangements for multi-party communication, e.g. for conferences
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40Support for services or applications
    • H04L65/403Arrangements for multi-party communication, e.g. for conferences
    • H04L65/4046Arrangements for multi-party communication, e.g. for conferences with distributed floor control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10Architectures or entities
    • H04L65/1016IP multimedia subsystem [IMS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066Session management
    • H04L65/1101Session protocols
    • H04L65/1104Session initiation protocol [SIP]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for establishing an audio conference connection.
  • Audio conferencing also known as teleconferencing, is an important and widely operated service in the Next Generation Network (NGN, Next Generation Network) and Multimedia Subsystem (IMS).
  • NTN Next Generation Network
  • IMS Multimedia Subsystem
  • the telephone system is mainly built on an IP media server.
  • SIP Session Initiation Protocol
  • MS Media Server
  • SIP AS SIP application server
  • the SIP AS 102 is used to control the terminal (UE) 103 and the MS 101, execute the conference logic, and construct conference signaling, maintain resources on the MS 101, and allocate resources for the call.
  • the SIPAS 102 can be called by the participating terminal (UE) copper drum gateway 104, and then the SIPAS 102 calls the MS 101 to create an audio conference.
  • the SIP AS 102 can also initiate the conference by the SIP AS. The following is a method for establishing an audio connection in the system shown in FIG. 1 by using a SIP AS as an example:
  • the SIP AS 102 sends an INVITE (SIP Call Initiation) message to the UE 103, and the UE 103 returns a 200 OK (Response) message carrying the SDP (Media Description Language) information of the UE 103 to the SIP AS 102 after off-hook.
  • the SDP information includes an IP address, a port number, and a type of processing media that receive the audio data packet.
  • the SIP AS 102 sends an INVITE message to the MS 101, where the INVITE message carries the SDP information of the UE 103, so that the MS 101 creates a conference terminal for transmitting and receiving data according to the SDP information of the UE 103, and simultaneously And assigning, to the conference terminal, an IP port for receiving and transmitting data, respectively.
  • the conference terminal can be regarded as an entity for transmitting data between the UE 103 and an audio processor on the MS 101.
  • the SIPAS 102 After the MS 101 creates the conference terminal of the UE 103, the SIPAS 102 The UE 103 sends a 200 OK message carrying the SDP information of the terminal. After the corresponding conference terminals on the UE 103 and the MS 101 both know the IP address and port number of the other party, the UE 103 and the MS 101 can The SDP information of each other transmits data.
  • the audio conference can only be implemented on one MS, that is, regardless of the number of terminals participating in the audio conference, all terminals of the conference can only be connected to one MS. This requires the MS to have sufficient resources to support the entire meeting.
  • the number of audio conference ports is limited. When the operation is busy, an MS often runs many conferences and occupies a large amount of resources. Therefore, if the number of participants attends the conference is far beyond The range that a single MS can withstand will not be able to obtain sufficient resources from one MS to create the meaning. Then, only the conference can be cancelled, or the number of participants can be reduced, thus affecting the normal convening of the conference. It can be seen that in the prior art, the size of the audio conference is greatly restricted due to the limitation of the resource capacity of a single MS, which affects the smooth progress of the audio conference.
  • An object of the embodiments of the present invention is to provide a method and apparatus for establishing an audio conference connection, which can use a plurality of MSs to create a large-scale audio conference by cascading.
  • At least two media servers MS are allocated, and one of the MSs is selected as the root node MS, and the rest is the leaf node MS;
  • the embodiment of the present invention further discloses a device for establishing an audio conference connection, including:
  • An allocating unit configured to allocate at least two media servers according to the number of terminals participating in the audio conference
  • MS one of the MSs is selected as the root node MS, and the rest is the leaf node MS;
  • a terminal connection unit configured to establish a connection between the terminal and the corresponding MS
  • the MS connection unit is configured to establish a connection between all leaf nodes MS and the root node MS.
  • an embodiment of the present invention further discloses a cascaded audio conference system, The method includes: at least two media servers MS, one of which is a root node MS, and the remaining MSs are leaf nodes MS;
  • the root node MS is connected to all leaf nodes MS and is connected to at least one terminal; the leaf node MS is connected to at least one terminal.
  • the embodiment of the present invention further discloses a media server MS of a cascaded audio conference system.
  • the MS is connected to at least one second MS according to the number of terminals participating in the audio conference, and when the second MS is The MS is connected to at least one terminal when connected to at least one terminal.
  • the embodiment of the invention has the following advantages:
  • the embodiment of the invention can adopt the method of cascading multiple media servers.
  • multiple media servers are cascaded to realize a large-scale conference function with an unlimited number of terminals, and the operating environment is solved. Due to insufficient resources of the media server, the problem of large conferences cannot be reliably held.
  • the present invention does not need to be considered for the user to be distributed on one or several media servers.
  • This conference runs on an integrated virtual large media server regardless of its size. For the operator, the corresponding number of media servers can be deployed according to the operating concurrent users.
  • the existing media server regardless of the manufacturer, can be integrated in this solution as long as it provides industry standard interfaces and capacity parameters.
  • FIG. 1 is a schematic diagram of a system architecture of an audio conference in the prior art
  • FIG. 2 is a schematic structural diagram of a system embodiment of a cascaded audio conference
  • FIG. 3 is a schematic block diagram of an embodiment of a method for establishing a cascaded audio conference between MSs according to the present invention
  • FIG. 4 is a schematic block diagram of a method for establishing an audio conference connection between a terminal and an MS according to the present invention
  • FIG. 5 is a schematic block diagram of an embodiment of a dynamic cascading method according to the present invention.
  • FIG. 6 is a schematic flow chart of an embodiment of a method for switching a terminal from silent to speaking according to the present invention.
  • FIG. 7 is a schematic structural block diagram of an apparatus for establishing an audio conference connection according to the present invention
  • FIG. 8 is a schematic structural block diagram of an embodiment of a media server unit in the apparatus of FIG. 7 according to the present invention
  • FIG. 10 is a schematic block diagram showing another embodiment of an apparatus for establishing an audio conference connection according to the present invention.
  • the method for establishing an audio conference connection is that the SIP AS uniformly manages all MSs including different vendors in the system, and is responsible for resource allocation of the MSs. When the resources of a single MS are insufficient to support the entire audio conference.
  • the SIP AS can establish two or more MS groups into a tree topology, and one of the MSs is used as the root node MS, and the remaining MSs are used as leaf nodes MS in the tree structure conference. Then, the terminal is allocated to the leaf node MS or the node, and the connection between the terminal and the MS where the terminal is located is established, and the connection between all the leaf nodes MS and the root node MS is established, thereby realizing all terminals.
  • the connection between the two For convenience of description, the present invention simply refers to such an audio conference connected in a tree structure as a concatenated audio conference.
  • FIG. 2 is a schematic diagram of a system architecture of a cascaded audio conference according to the present invention.
  • the SIP AS 102 allocates multiple MSs to the audio conference according to the size of the audio conference and the resource bearer range on each MS.
  • MS0 to MSn in Figure 1.
  • the MS0 is a root node, and the M0 UEs are allocated to the MS0. Therefore, M0 conference terminals are allocated on the MS0, and n conference terminals are also allocated on the MS0.
  • the leaf nodes MS 1 to MSn corresponding to the leaf nodes MS 1 to MSn. Thus, at least the MO + n conference terminals are occupied on the MS0.
  • the leaf node MS1 is also allocated M1 conference terminals for corresponding to the UE, and one conference terminal for accessing the root node MS0. Other leaf nodes are similar.
  • the following is a method for establishing an audio connection according to the system architecture diagram shown in FIG. 2, which requires each leaf node MS in the conference to establish a connection with the root node MS0. At the same time, the UE on each MS also establishes a connection with the MS where the UE is located.
  • FIG. 3 is a schematic block diagram of a method for establishing a cascade conference of a root node and a leaf node according to the present invention.
  • a method for establishing a cascade audio conference between a leaf node MS1 and a root node MS0 includes:
  • S301 The SIP AS in the system sends an INVITE message to the root node MS0.
  • the MS0 creates a conference terminal TO after receiving the INVITE message, and allocates an IP port for receiving and transmitting an audio data packet to the conference terminal TO. Then, the MS0 returns a 200 OK message to the SIP AS.
  • the 200 OK message carries the SDP of the conference terminal TO. Information, the SDP. The information includes the IP address, port number, and type of processing media of the audio data packet received by the conference terminal T0.
  • the SIP AS sends an INVITE message to the leaf node MS1.
  • the INVITE message carries the SDP of the conference terminal T0. information.
  • the MS1 After receiving the INVITE message in the S303, the MS1 creates a conference terminal T1, and allocates an IP port for receiving and transmitting an audio data packet to the conference terminal T1. Then, the MS 1 returns a 200 OK message to the SIP AS.
  • the 200 OK message carries the SDP t information of the conference terminal T1, where the SDP t information includes the IP address, the port number, and the type of the processing medium of the audio data packet received by the conference terminal T1.
  • S305 The SIP AS sends the SDP information to the MS0 by using an ACK (Answer) message to notify the MS0 of the information about the conference terminal allocated by the MS1.
  • ACK acknowledgement
  • both of the conference terminals T0 and T1 know each other's SDP information, and can transmit corresponding data according to each other's SDP information in subsequent communications.
  • the connection for the audio conference is now established.
  • S306 The SIP AS sends a SIP INFO (SIP Media Processing Control Language) message created and joined to the primary conference to the MS0, instructing the MS0 to create a primary conference, and adding the conference terminal T0 to the primary after the creation. in meeting.
  • SIP INFO SIP Media Processing Control Language
  • S307 The SIP AS sends a SIP INFO message to the MSI to create and join the sub-meeting, instructs the MSI to create a sub-conference, and adds the conference terminal T1 to the sub-conference after the creation. Since the method of creating a cascade conference for the other leaf nodes in the conference and the root node MS0 is the same as the above method, it is no longer - praise.
  • the above method describes a method of establishing a cascaded audio conference between MSs, when all the leaves are required. After the node MSs are connected to the root node MS0, and if the terminals allocated on each MS are added to the conference, the entire audio conference is established. The method for the terminal to join the MS will be described below.
  • FIG. 4 it is a schematic block diagram of a method for establishing a conference connection between a terminal and an MS according to the present invention. The method includes:
  • S401 The SIP AS sends an INVITE message to the terminal.
  • the terminal returns a 200 OK message carrying the SDP information of the terminal to the SIP AS after the off-hook, where the terminal SDP information includes an IP address, a port number, and a processing medium of the terminal receiving the audio data packet. type.
  • the SIP AS sends an INVITE message to the MS.
  • the INVITE message carries the SDP information of the terminal.
  • the MS creates a conference terminal TO after receiving the INVITE message, and allocates an IP port for receiving and transmitting an audio data packet to the conference terminal TO. Then, the MS returns a 200 OK message to the SIP AS.
  • the 200 OK message carries the SDP of the conference terminal T0. Information, the SDP. The information includes the IP address of the audio data packet received by the conference terminal T0, the port number, and the type of processing medium.
  • S405 The SIP AS sends an ACK message to the terminal, where the ACK message includes the SDP of the T0.
  • the information is used to notify the terminal of the information about the conference terminal T0 on the MS.
  • both the terminal and the conference terminal T0 on the MS know each other's SDP information so as to be able to communicate with each other based on the SDP information.
  • the SIP AS sends a SIP INFO message to the MS to join the primary conference or the conference, and instructs the MS to join the conference terminal T0 to the corresponding primary conference or sub conference.
  • the terminal connected to the conference terminal T0 is connected to the conference.
  • the SIP AS when the primary conference or the sub-conference is not created on the MS, the SIP AS sends a SIP INFO message to the MS to create and join the primary conference or the conference, to instruct the MS.
  • the conference is created first, and then the conference terminal T0 is added to the conference.
  • the SIP INFO message for creating the main conference or the sub-meeting may be sent first, so that the MS first creates a primary conference or a sub-conference, and then sends a SIP INFO message to join the primary conference or the conference, to instruct the MS to The conference terminal T0 is added to the conference.
  • the above embodiment is when the size of the audio conference is so large that a single MS cannot have sufficient resources.
  • the personnel participating in the audio conference can be distributed on different MSs, and the terminal and the MS can be connected through the method shown in FIG. 4 on each MS, and all the leaf nodes MS are passed.
  • the cascading mode shown in FIG. 3 above establishes a connection with the root node MS, so that all members are added to the audio conference.
  • how many MSs are allocated depends on the number of terminals actually participating in the conference and the number of ports per MS.
  • a conference terminal is also allocated for joining the primary conference of the upper-level root node MS.
  • the root node MS also allocates corresponding conference terminals to each leaf node participating in the main conference to ensure communication with each leaf node.
  • the root terminal MS is first instructed to create a conference terminal by S301, and then, in S303, the leaf node MS is instructed to create a conference associated with the conference terminal of the root node MS. a terminal, thereby establishing a connection between the root node MS and the leaf node MS.
  • the method for establishing a connection between the root node MS and the leaf node MS may be: first, in S301, the leaf node MS is instructed to create a conference terminal, and in S302, the SDP information of the conference terminal created by the leaf node MS is passed. A 200 OK message is sent to the SIP AS. The node MS is then instructed in S303 to create a conference terminal associated with the conference terminal on the leaf node MS.
  • the foregoing embodiment may be referred to as a static cascading creation mode, that is, the personnel participating in the conference are fixed, so when creating an audio conference, a conference of a corresponding scale may be created according to the number of conferences.
  • the dynamic cascading creation mode may also be adopted, that is, when the new member is required to be added during the conference, the SIP AS may separately calculate whether the MS joined to the conference still returns.
  • a leaf node MS may be newly allocated to the conference, and the terminal to be added is Establishing a connection with the newly allocated leaf node MS, and simultaneously, the newly allocated leaf
  • the method for establishing a connection between the terminal node and the root node MS, and the terminal establishing a connection with the newly allocated leaf node MS is similar to the embodiment shown in FIG. 4, and the newly allocated leaf node MS establishes a connection with the root node MS. The method is similar to the embodiment shown in FIG. 3 and will not be described here.
  • the newly allocated leaf node MS is established with the root node at this time.
  • a terminal in the root node MS needs to be transferred from the main conference to the sub-sense, so as to save a conference terminal associated with the terminal for cascading with the new MS.
  • the new MS is connected to the root node MS of the conference to implement the joining of the new terminal.
  • the method of adding a new user to an existing cascading audio conference is referred to as dynamic cascading
  • the conference is referred to as a dynamic cascading conference.
  • FIG. 5 is a schematic block diagram of a flow of an embodiment of a dynamic cascading method according to the present invention.
  • the embodiment includes:
  • the SIP AS selects a terminal U0 of the root node MS0, and obtains the conference terminal T0 corresponding to the terminal U0 according to the correspondence between the terminal maintained by the terminal and the conference terminal on the MS0.
  • the SIP AS may preferentially select a terminal in a mute state.
  • the mute state means that the sound is forbidden to be heard.
  • S502 The SIP AS newly allocates a leaf node MS1 to the conference, and sets an SDP of the conference terminal TO on the MS0. The information is sent to the MSI through an INVITE message.
  • the MS1 creates a conference terminal T1 after receiving the INVITE message, and allocates an IP port for receiving and transmitting an audio data packet to the conference terminal T1.
  • the MS 1 then returns a 200 OK message to the SIP AS.
  • the 200 OK message carries the SDP t of the conference terminal T1, and the SDP ⁇ includes the IP address, the port number, and the type of the processing medium of the audio data packet received by the conference terminal T1.
  • S504 The SIP AS sends a RE-INVITE message to the MS0, where the RE-INVITE message includes SDP information of the conference terminal T1.
  • the MS0 After receiving the RE-INVITE message, the MS0 returns a 200 OK message to the SIP AS.
  • the 200 OK message carries the SDPo information of the conference terminal TO.
  • S506 The SIP AS sends a SIP INFO message to the MS to create and join a sub-conference, instructing the MSI to create a sub-meeting, and adding the conference terminal T1 to the sub-conference after the creation. Medium.
  • S507 The SIP AS sends an INVITE message to the MS1, where the SDP information of the terminal U0 is included in the INVITE message.
  • the SIP AS After receiving the 200 OK message, the SIP AS sends a RE-INVITE message to the terminal U0, where the RE-INVITE message includes the SDP 2 information of the T2.
  • S510 The SIP AS sends a SIP INFO message to the MSI to join the conference, to instruct the MS1 to join the conference terminal T2 into the conference.
  • the SIP AS may first send a BYE (terminate call) message to the MS0 before invoking the INVITE message to the MS1, to instruct the MS0 to release the conference terminal T0.
  • the SIP AS may send an INVITE message to the MS0 instead of the RE-INVITE message in the S504, to instruct the MS0 to create another conference terminal, and in the above S505.
  • the 200 OK message returned to the SIP AS includes SDP information of the newly created Hanhan terminal.
  • the INVITE message in S504 includes SDP information of T1 allocated by the MS1.
  • the terminal in the root node MS can be switched to the leaf node to release a certain
  • the resource is used to access the newly created leaf node MS, and then the new member terminal is added to the conference through the newly created leaf node MS.
  • the existing leaf node MS is added to implement the expansion of the existing conference size.
  • the SIP AS when the terminal U0 in the node MS0 is in the mute state, in the S506, the SIP AS sends a SIP INFO message to create and join the sub-session in addition to the MS 1.
  • an unmuted SIP INFO message needs to be sent to the MS0 to instruct the MS0 to cancel the mute state of the terminal U0.
  • FIG. 6 is a schematic block diagram of a method for switching a terminal from silent to speaking according to the present invention.
  • S601 The SIP AS sends a BYE message to the leaf node MS1 to specify that the MS1 releases the resource of the conference terminal T1 corresponding to the terminal U1.
  • the SIP AS sends an INVITE message to the root node MS0.
  • the INVITE message includes the SDP t of the terminal U1.
  • the MS0 creates a conference terminal TO after receiving the INVITE message, and allocates an IP port for receiving and transmitting an audio data packet to the conference terminal TO.
  • the MS0 then returns a 200 OK message to the SIP AS.
  • the 200 OK message carries the SDP of the conference terminal TO.
  • the information includes the IP address of the audio data packet received by the conference terminal T0, the port number, and the type of the processing medium.
  • S604 The SIP AS sends a RE-INVITE message to the terminal U1, where the RE-INVITE message includes SDP 0 information of the conference terminal T0.
  • the terminal U1 returns a 200 OK message to the SIP AS after receiving the RE-INVITE message.
  • the 200 OK message includes SDP information of the terminal U1.
  • the SIP AS sends a SIP INFO message to the MS0 to join the primary conference, to instruct the MS0 to join the conference terminal T0 to the primary conference.
  • the above embodiment is applicable when there is sufficient resources on the root node MS0 for the addition of the terminal U1. If the resource on the node MS0 is insufficient, the S601 operation may be performed, and then implemented in the method shown in FIG. 5, and added to the main conference on the root node MS0, which is not mentioned here.
  • the INVITE message or the RE-INVITE message sent by the SIP AS may also be controlled, for example, by changing the INVITE message or the RE-INVITE message.
  • mute means that the sound is forbidden to be heard, and mute means that the pronunciation is prohibited.
  • the foregoing embodiments are all implementation methods of the SIP protocol, but are not limited thereto.
  • the MGCP protocol is different from the foregoing SIP protocol implementation.
  • the application server instructs the media server to create a terminal in the MGCP protocol
  • the CRCX message is sent instead of the INVITE message in the foregoing embodiment.
  • the conference number is no longer generated by the application server, and when the media server creates the conference terminal, it is generated by the media server, and the generated conference number is notified by the 200 OK message.
  • the application server is configured to notify the media server of the conference number by using the CRCX message when the application server can instruct the media server to create the conference terminal later.
  • the MDCX message is sent in the MGCP protocol instead of the SIP INFO message in the foregoing embodiment.
  • the application server in the MGCP protocol replaces the BYE message in the above embodiment by sending a DLCX message.
  • the foregoing embodiment adopts a method of cascading multiple media servers.
  • multiple media servers are cascaded into a master-slave conference with a tree topology to realize a large-scale conference function with an unlimited number of terminals. It solves the problem that the large-scale conference cannot be reliably held in the case of insufficient media server resources in the operating environment.
  • the present invention does not need to consider that the conference is distributed on one or several media servers, and this does not matter how much, it runs on an integrated virtual large media server.
  • the number of media servers can be deployed according to the size of the operating concurrent users.
  • the existing media servers regardless of vendor, provide industry standard interfaces and capacity parameters, which can be integrated in this solution. . This also saves a lot of equipment costs.
  • an embodiment of the present invention further discloses an apparatus for establishing an audio conference connection, where the apparatus can be integrated on an application server such as a SIP AS, and when the resources of a single MS are insufficient to support the entire audio conference, Depending on the size of the audio conference, all participants in the conference are added to the conference by cascading more than two MSs.
  • a schematic block diagram of a device for establishing an audio conference connection according to the present invention includes: an allocating unit 701, a terminal connecting unit 702, and an MS connecting unit 703, where
  • the allocating unit 701 is configured to allocate at least two media according to the number of terminals participating in the audio conference.
  • the body server MS selects one of the MSs as the root node MS, and the rest is the leaf node MS; wherein the number of the allocated MSs may be determined according to factors such as the size of the audio conference and the resource bearment range on each MS. .
  • the terminal connection unit 702 is configured to allocate the terminal to all the MSs allocated by the allocating unit 701, and establish a connection between the terminal and the corresponding MS respectively; wherein all the terminal connection units 702 can prepare to speak.
  • the terminals are all assigned to the root node MS, and other terminals that do not speak are allocated on these leaf nodes MS.
  • the establishing a connection between the terminal and the MS can establish a connection between the terminal and the conference terminal by creating a conference terminal associated with the terminal on the MS.
  • the MS connection unit 703 is configured to establish a connection between all leaf nodes MS in the allocating unit 701 and the root node MS. All the terminal connection units 702 can respectively instruct to create an associated conference terminal on the root node MS and the leaf node MS, and implement the root node MS and the leaf node MS by communication between the conference terminals. the connection between.
  • the establishing the associated conference terminal on the root node MS and the leaf node MS respectively may specifically be: instructing the leaf node MS to create a conference terminal associated with the conference terminal on the root node MS, or may also instruct the root node MS Create a conference terminal that is associated with the conference terminal on the leaf node.
  • the MS connection unit 703 can instruct a leaf node MS to be created and associated with a conference terminal TO on a node MS. Conference terminal Tl.
  • the MS connection unit 703 includes: a root node conference terminal unit 7031, and a first MS connection subunit 7032, where
  • the root node conference terminal unit 7031 is configured to send an INVITE message to the root node MS in the allocating unit 701, to instruct the root node MS to create a conference terminal TO;
  • the first MS connection subunit 7032 is configured to send an INVITE message to the leaf node MS in the allocating unit 701 after receiving the response message returned by the node MS, where the INVITE message includes the root
  • the information creates a conference terminal T1 associated with the conference terminal TO of the root node MS.
  • both of the conference terminals ⁇ 0 and T1 know each other's SDP information, and can transmit corresponding data according to each other's SDP information in subsequent communications.
  • SDP letter The information includes the IP address, port number, and type of processing media that the conference terminal receives for audio packets.
  • FIG. 9 is a schematic block diagram showing another structure of the MS connection unit 703 in the apparatus embodiment shown in FIG. 7.
  • the MS connection unit 703 can instruct the root node MS to create and the conference terminal on the leaf node MS. T1 associated conference terminal TO.
  • the MS connection unit 703 includes: a leaf node conference terminal unit 7033 and a second MS connection subunit 7034, where
  • the leaf node conference terminal unit 7033 is configured to send an INVITE message to the leaf node MS in the allocating unit 701 to instruct the leaf node MS to create a conference terminal T1; the second MS connection subunit 7034, And after receiving the response message returned by the leaf node MS, sending an INVITE message to the root node MS in the allocating unit 701, where the INVITE message includes the conference terminal T1 created by the leaf node MS SDP t, instructing the root node MS to create a conference terminal T0 associated with the conference terminal T1 of the leaf node MS according to the SDP ⁇ .
  • both of the conference terminals TO and T1 know each other's SDP information, and can transmit corresponding data according to each other's SDP information in subsequent communications.
  • the SDP information includes the IP address, port number, and type of processing media that the conference terminal receives the audio data packet.
  • the foregoing device embodiments are all directed to a static cascading mode.
  • the device may separately calculate whether the MS joined to the conference has resources.
  • a conference terminal is created. If there is a resource, the terminal connection unit 702 of the device can directly allocate a conference terminal to the terminal to be joined on the MS with the resource to implement the connection between the new terminal and the MS where the conference is located.
  • FIG. 10 it is a structural block diagram of another embodiment of an apparatus for establishing an audio conference connection according to the present invention.
  • the apparatus may further include:
  • Creating and joining a conference unit 1001, configured to create a main conference of the audio conference on the root node MS in the allocating unit 701, and add a conference terminal on the root node MS to the main conference;
  • a sub-conference of the audio conference is created on each leaf node MS in the allocating unit 701, and the conference terminals on each leaf node MS are respectively added to the respective sub-conferences.
  • the creating conference unit 1001 may instruct the root node MS to create a primary conference by sending a SIP INFO message for creating and joining the primary conference to the root node MS, and after the creation, the conference on the root node MS The terminal is added to the main conference.
  • the leaf node MS may be instructed to create a sub-meeting by sending a SIP INFO message to the leaf node MS to create and join the sub-conference, and after the creation, the conference terminal on the leaf node MS is added to the sub-conference.
  • creating conference unit 1001 and the joining conference unit 1002 described in FIG. 10 are applicable to the apparatus embodiment shown in FIG. 8 or 9 in addition to the apparatus embodiment shown in FIG. It is the same as the device embodiment shown in FIG. 10 above, and will not be described here.
  • an application server (such as SIP AS) having the above device for establishing an audio conference connection is also within the protection scope of the present invention.
  • the cascading audio conference system implementing the method also belongs to the protection scope of the present invention.
  • the system includes at least two media servers MS, one MS is a root node MS, and the remaining MSs are leaf nodes MS;
  • the leaf node MS is connected to at least one terminal;
  • the leaf node MS is connected to at least one terminal.
  • the specific working process of each MS can refer to the previous article.
  • the MS in the above example also belongs to the protection scope of the present invention.
  • the MS is connected to at least one second MS according to the number of terminals participating in the audio conference, and when the second MS is connected to at least one terminal, the MS Connected to at least one terminal.
  • the MS may be a node, and one possible structure is: consisting of a first connection unit and a second connection unit, where the first connection unit is used to establish a connection with the terminal; Establish a connection to all other MSs in the system.
  • the MS may also be a leaf node.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, can be embodied in the form of a software product.
  • the software product may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to implement the present invention as described above.
  • a computer device which may be a personal computer, a server, or a network device, etc.

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Description

一种建立音频会议连接的方法和装置
本申请要求于 2008 年 1 月 31 日提交中国专利局、 申请号为 200810006800.9、 发明名称为"一种建立音频会议连接的方法和装置"的中国专 利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域, 尤其涉及一种建立音频会议连接的方法和装 置。
背景技术
音频会议 , 又称电话会议 , 是目前下一代网络( NGN , Next Generation Network )和多媒体子系统(IMS, IP Multimedia Subsystem ) 中重要的运营广 泛的业务。 目前, 在电信领域, 电话^义系统主要构建在 IP媒体服务器上。 例如, 如图 1所示, 在 SIP ( Session Initiation Protocol, ^舌初始化协议) 中 电话^义体系包^?某体服务器( MS, Media Server ) 101和 SIP应用服务器( SIP AS ) 102。 其中, 所述 SIP AS 102用于控制终端(UE ) 103和 MS101、 执行会 议逻辑以及构建会议信令、 负责维护 MS101上的资源、 以及为呼叫分配资源。 当创建音频^义时,可由参加^义的终端(UE )铜鼓网关 104呼入 SIPAS102, 然后再由所述 SIPAS102呼叫 MS101来创建音频会议。 当然, 也可由所述 SIP AS102主动发起会汉, 下面以 SIP AS发起会汉为例, 说明一下在图 1所示的 系统中常用的一种建立音频 义连接的方法:
SIP AS 102向 UE103发送 INVITE ( SIP呼叫发起 ) 消息, 所述 UE103在 摘机后向所述 SIP AS102返回携带了所述 UE103的 SDP (媒体描述语言 )信 息的 200 OK (应答) 消息, 其中, 所述 SDP信息包含接收音频数据包的 IP 地址、 端口号和处理媒体的类型。
所述 SIP AS 102再向 MS 101发送 INVITE消息,其中所述 INVITE消息中 携带了所述 UE103的 SDP信息, 以便所述 MS101根据所述 UE103的 SDP信 息创建一个用于收发数据的会议端子, 同时, 为所述会议端子分配分别用于接 收和发送数据的 IP端口。 其中, 所述会议端子可以看作是位于所述 UE103和 所述 MS101上的音频处理器之间用于传输数据的实体。
当所述 MS101创建好所述 UE103的会议端子后, 通过所述 SIPAS102向 所述 UE103发送携带了所述^义端子的 SDP信息的 200 OK消息, 当 UE103 和 MS101上对应的会议端子都知会了对方的 IP地址和端口号等相关信息后, UE103和 MS101就可以根据彼此的 SDP信息传输数据了。
然而,在进行本发明创造过程中,发明人发现现有技术中至少存在如下问 题:
在现有技术中, 由于音频会议只能在一台 MS上实现, 也就是说无论参加 音频会议的终端有多少, 该会议的所有终端都只能连接在一台 MS上。 这就需 要 MS必须有足够的资源来支持整个会议。 而对于一般商用的 MS, 其上音频 会议端口的数量是有限的, 在运营业务繁忙时, 一台 MS上往往会运行着很多 会议, 占用着大量资源, 因此, 如果参加会议的人数远远超出了单台 MS所能 承受的范围, 将无法从一台 MS上获取到足够的资源来创建该^义, 那么就只 能取消会议, 或者减少参会的人数, 因此会影响会议的正常召开。 可见, 现有 技术中会往往由于单台 MS 的资源容量的局限性而很大程度上制约了音频会 议的规模, 影响音频会议的顺利进行。
发明内容
本发明实施例的目的在于提供一种建立音频会议连接的方法和装置,能够 使用多台 MS通过级联的方式来创建大型音频会议。
本发明实施例提供的一种建立音频会议连接的方法, 包括:
根据参加音频会议的终端数量, 分配至少两个媒体服务器 MS , 从所述 MS中选择一个作为根节点 MS, 其余为叶子节点 MS;
建立所有叶子节点 MS与所述 节点 MS的连接;
建立终端与该终端所在 MS的连接。
基于上述技术方案, 本发明实施例还公开了一种建立音频会议连接的装 置, 包括:
分配单元, 用于根据参加音频会议的终端数量,分配至少两个媒体服务器
MS, 从所述 MS中选择一个作为根节点 MS, 其余为叶子节点 MS;
终端连接单元, 用于建立终端与各自对应的 MS的连接;
MS连接单元, 用于建立所有叶子节点 MS与所述根节点 MS的连接。 基于上述技术方案,本发明实施例还公开了一种级联音频会议系统,其特 征在于, 包括至少两个媒体服务器 MS, 其中一个 MS为根节点 MS, 其余 MS 为叶子节点 MS;
所述根节点 MS连接所有叶子节点 MS, 且与至少一个终端相连; 所述叶子节点 MS与至少一个终端相连。
基于上述技术方案,本发明实施例还公开了一种级联音频会议系统的媒体 服务器 MS, 根据参加音频会议的终端数量, 所述 MS与至少一个第二 MS相 连,且当所述第二 MS与至少一个终端相连时,所述 MS与至少一个终端相连。
与现有技术相比, 本发明实施例具有以下优点:
本发明实施例可采用级联多台媒体服务器的方法,在单台设备无法满足会 议需求时, 将多台媒体服务器级联起来, 实现不限终端数量的大型会议功能, 解决了在运营环境下因媒体服务器资源不足, 而无法可靠召开大型会议的问 题。 本发明对用户而言, 无须考虑^义分布在一台或几台媒体服务器上, 这个 会议无论规模多大, 就在一台集成后的虚拟大媒体服务器上运行。对于运营商 来说,可根据运营并发用户 莫来部署相应数量的媒体服务器,现存的媒体服 务器不论是哪个厂商的, 只要提供行业标准接口、 容量参数, 在本方案中均可 集成使用。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案 ,下面将对实施 例或现有技术描述中所需要使用的附图作简单的介绍,显而易见地, 下面描述 中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付 出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为现有技术一种音频会议的系统构架示意图;
图 2为本发明一种级联音频会汉的系统实施例构架示意图;
图 3为本发明一种 MS之间建立级联音频会议的方法实施例的流程示意框 图;
图 4为本发明一种终端与 MS建立音频会议连接的方法实施例的流程示意 框图;
图 5为本发明一种动态级联方法实施例的流程示意框图;
图 6 为本发明一种终端由静音转为发言的切换方法实施例的流程示意框 图;
图 7为本发明一种建立音频会议连接的装置实施例的结构示意框图; 图 8为本发明图 7装置中一种媒体服务器单元实施例的结构示意框图; 图 9为本发明图 7装置中另一种媒体服务器单元实施例的结构示意框图; 图 10为本发明另一种建立音频会议连接的装置实施例的结构示意框图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明提供的一种建立音频会议连接的方法是由 SIP AS将系统中所有包 括不同厂商的 MS进行统一管理, 并负责这些 MS的资源分配, 当单台 MS的 资源不足以支撑整个音频会议时, 所述 SIP AS可以将两台以上的 MS组建成 树型拓朴结构, 将其中的一个 MS作为根节点 MS, 其余 MS作为该树型结构 会议中的叶子节点 MS。 然后, 将终端分配在所述叶子节点 MS或 ^节点上, 并分别建立终端与该终端所在 MS的连接,并且建立所有叶子节点 MS与所述 根节点 MS之间的连接, 从而实现所有终端之间的连接。 为方便说明, 本发明 将这种以树型结构连接的音频会议简称为级联音频会议。
如图 2所示, 为本发明一种级联音频会议的系统架构示意图。 当创建的音 频会议规模较大, 单个 MS没有足够的资源来满足该音频会议时, SIP AS 102 则根据该音频会议的规模以及每个 MS上的资源承受范围,为该音频会议分配 多台 MS, 例如图 1中 MS0至 MSn。 其中, 所述 MS0为根结点, 为所述 MS0 分配了 M0个 UE, 因此, 在所述 MS0上分配了 M0个会议端子, 同时, 在所 述 MS0上还分配了 n个会议端子用于与叶子节点 MS 1至 MSn对应。 这样所 述 MS0上至少占用了 MO + n个会议端子。此外, 图 2中还为所述叶结点 MS1 分配了 Ml个用于与 UE对应的会议端子, 以及 1个用于接入根节点 MS0的 会议端子。 其他叶子节点雷同。
下面结合图 2所示的系统架构图,举例说明本发明一种建立音频^义连接 的方法, 该方法需要会议中的各叶子节点 MS都要与根节点 MS0建立连接, 同时, 各 MS上的 UE也要与该 UE所在的 MS建立连接。
如图 3所示,为本发明一种根节点和叶子节点建立级联会议的方法实施例 流程示意框图。 在图 2所示的系统中, 叶子节点 MS1与根节点 MS0之间建立 级联音频会议的方法包括:
S301 : 系统中的 SIP AS向根节点 MS0发送 INVITE消息。
S302: 所述 MS0在收到所述 INVITE消息后创建会议端子 TO, 并且为所 述会议端子 TO分配分别用于接收和发送音频数据包的 IP端口。 然后, 所述 MS0向所述 SIP AS返回 200 OK消息。其中, 所述 200 OK消息携带了所述会 议端子 TO的 SDP。信息, 所述 SDP。信息包含所述会议端子 T0接收音频数据 包的 IP地址、 端口号和处理媒体的类型。
S303:所述 SIP AS向叶子节点 MS1发送 INVITE消息。其中,所述 INVITE 消息中携带了所述会议端子 T0的 SDP。信息。
S304: 所述 MS1在收到所述 S303 中的 INVITE消息后, 创建会议端子 T1 ,并且为所述会议端子 T1分配用于接收和发送音频数据包的 IP端口。然后, 所述 MS 1向所述 SIP AS返回 200 OK消息。 其中, 所述 200 OK消息中携带 了所述会议端子 T1的 SDP t息, 所述 SDP t息包含所述会议端子 T1接收 音频数据包的 IP地址、 端口号和处理媒体的类型。
S305: 所述 SIP AS将所述 SDP信息通过 ACK (应答) 消息发送给所述 MS0, 以通知所述 MS0所述 MS1所分配得到的会议端子的相关信息。 这样, 两个会议端子 T0和 T1都知道了彼此的 SDP信息, 能够在后续的通信中根据 彼此 SDP信息传输相应的数据。 此时用于音频会议的连接已经建立好。
S306: 所述 SIP AS向所述 MS0发送创建并加入主会议的 SIP INFO ( SIP 媒体处理控制语言) 消息, 指令所述 MS0创建主会议, 并在创建后将所述会 议端子 T0加入到该主会议中。
S307:所述 SIP AS向所述 MSI发送创建并加入子会议的 SIP INFO消息, 指令所述 MSI创建子会议,并在创建后将所述会议端子 T1加入到该子会议中。 由于对于会议中的其他叶子节点与根节点 MS0的创建级联会议的方法都与上 述方法雷同, 在此不再——赞述。
上述方法描述的是 MS之间建立级联音频会议的方法,当所需的所有叶子 节点 MS都与根节点 MS0建立起连接后, 并且如果每个 MS上分配的终端都 加入到了该会议中, 则整个音频会议就建立起来了, 下面将描述一下终端加入 到 MS的方法。 如图 4所示, 为本发明一种终端与 MS建立会议连接的方法实 施例的流程示意框图, 该方法包括:
S401 : 所述 SIP AS向终端发送 INVITE消息。
S402:所述终端在摘机后向所述 SIP AS返回携带了该终端 SDP信息的 200 OK消息, 其中, 所述终端 SDP信息包括所述终端接收音频数据包的 IP地址、 端口号和处理媒体的类型。
S403: 所述 SIP AS向 MS发送 INVITE消息。 其中, 所述 INVITE消息中 携带了所述终端的 SDP信息。
S404: 所述 MS在收到所述 INVITE消息后创建会议端子 TO, 并且为所 述会议端子 TO分配分别用于接收和发送音频数据包的 IP端口。 然后, 所述 MS向所述 SIP AS返回 200 OK消息。 其中, 所述 200 OK消息中携带了所述 会议端子 T0的 SDP。信息, 所述 SDP。信息包括所述会议端子 T0接收音频数 据包的 IP地址、 端口号和处理媒体的类型。
S405: 所述 SIP AS向所述终端发送 ACK消息 , 所述 ACK消息中包含所 述 T0的 SDP。信息, 以通知所述终端所述 MS上的会议端子 T0的相关信息。 这样, 终端和 MS上的会议端子 T0都知道了彼此的 SDP信息, 以便彼此能够 根据所述 SDP信息通信。
S406:所述 SIP AS向所述 MS发送加入主会议或子会议的 SIP INFO消息 , 指令所述 MS将所述会议端子 T0加入到相应的主会议或子会议中。 这样, 与 所述会议端子 T0连接的终端就接入到了会议中。
此外 , 在所述 S406中 , 当所述 MS上没有创建主会议或子会议时, 则所 述 SIP AS向所述 MS发送创建并加入主会议或子会议的 SIP INFO消息, 以指 令所述 MS先创建会议, 然后再将所述会议端子 T0加入到该会议中。 当然, 还可以先发送创建主会议或子会议的 SIP INFO消息, 以指令所述 MS先创建 主会议或子会议, 然后再发送加入主会议或子会议的 SIP INFO消息, 以指令 所述 MS将所述会议端子 T0加入到该会议中。
上述实施例是当音频会议的规模很大致使单个 MS 无法具备足够的资源 来满足会议时, 可通过将参加音频会议的人员分布在不同的 MS上, 并且在每 个 MS上都可通过图 4所示的方法将终端和 MS建立起连接,并将所有叶子节 点 MS通过上述图 3所示的级联方式与根节点 MS建立连接,从而使所有成员 都加入到该音频会议中。
其中,分配多少个 MS要根据实际参加会议的终端数量以及每个 MS的端 口数量决定。 在根节点 MS上创建主会议, 在每个叶子节点 MS上也要分别创 建子会议。 在每个叶子节点 MS上, 除了要为连接在本 MS上的终端分配相应 会议端子外, 还要为分配一个会议端子, 用于加入上级根节点 MS的主会议。 同样, 在根节点 MS上除了要为参加主会议的终端分配相应的会议端子外, 还 要为与参加该主会议的各叶子节点分配相应的会议端子,以保证能够与各叶子 节点连接通信。
需要说明的是, 上述图 3 所示的实施例中, 是通过 S301 先指令根节点 MS创建会议端子, 然后, 在 S303中指令叶子节点 MS创建与所述根节点 MS 的会议端子相关联的会议端子,以此来建立所述根节点 MS与叶子节点 MS之 间的连接。此外,建立根节点 MS与叶子节点 MS之间的连接的方法还可以是: 先在 S301 中指令叶子节点 MS创建会议端子, 在 S302中, 将所述叶子节点 MS创建的会议端子的 SDP信息通过 200 OK消息发送给所述 SIP AS 。 然后 在 S303中指令 节点 MS创建与所述叶子节点 MS上的会议端子相关联的会 议端子。
上述实施例可以简称为静态级联创建方式, 即参加 义的人员固定不变, 因此在创建音频会议时, 可根据会议的人数创建相应规模的会议。 在其他实 施例中, 还可以采用动态级联创建方式, 即: 当在会议的过程中, 如果需要 加入新成员时, 则所述 SIP AS还可分别计算加入到该会议中的 MS的是否还 有资源来创建一个会议端子, 若有资源, 则可按照所述图 4所示的方法在有 资源的 MS上为待加入的终端分配一个会议端子, 然后将该会议端子加入到 所述 MS上的相应会议中。
此外, 当待加入的终端有若干了, 而 MS中现有资源不足以分配给所述待 加入的终端时, 则还可以为该会议新分配一个叶子节点 MS, 将所述待加入 的终端都与所述新分配的叶子节点 MS建立连接, 同时, 将所述新分配的叶 子节点 MS与所述根节点 MS连接, 其终端与新分配的叶子节点 MS建立连 接的具体方法与图 4所示实施例相似, 所述新分配的叶子节点 MS与所述根 节点 MS建立连接的方法与图 3所示的实施例相似, 在此不再赞述。
此外, 若所述 SIP AS计算得到所述会议所在的根节点 MS中没有资源供 所述新分配的叶子节点 MS加入时, 则此时将所述新分配的叶子节点 MS建 立与所述根节点的连接之前, 还需要将根节点 MS中的一个终端从主会议转 移到子 义中 , 以便节省出一个与所述终端相关联的会议端子用于与所述新 的 MS级联。 然后再将所述新的 MS与该会议的根节点 MS连接, 来实现新 终端的加入。 为方便描述, 本文将这种在已有的级联音频会议中加入新用户 的方法简称作动态级联, 将该会议称为动态级联会议。
如图 5所示, 为本发明一种动态级联方法实施例的流程示意框图。 当会议 所在的 MS都没有足够资源供新用户终端 U1加入时, 该实施例包括:
S501 : SIP AS选择根节点 MS0上的一个终端 U0,并根据自身维护的终端 与 MS0上的会议端子的对应关系,得到所述终端 U0对应的会议端子 T0。其 中, 所述 SIP AS可优先选择静音状态的终端。 这里, 静音状态是指禁止听到 声音。
S502: 所述 SIP AS为该会议新分配一个叶子节点 MS1 , 并将 MS0上所述 会议端子 TO的 SDP。信息通过 INVITE消息发送给所述 MSI。
S503: 所述 MS1在收到所述 INVITE消息后创建一个会议端子 Tl, 并且 为所述会议端子 T1分配分别用于接收和发送音频数据包的 IP端口。 然后,所 述 MS 1向所述 SIP AS返回 200 OK消息。 其中, 所述 200 OK消息中携带了 所述会议端子 T1的 SDP t息, 所述 SDP ^、中包括所述会议端子 T1接收 音频数据包的 IP地址、 端口号和处理媒体的类型。
S504: 所述 SIP AS 向所述 MS0 发送 RE-INVITE 消息, 其中, 所述 RE-INVITE消息中包含所述会议端子 T1的 SDP信息。
S505: 所述 MS0在收到所述 RE-INVITE消息后 , 向所述 SIP AS返回 200 OK消息。 其中, 所述 200 OK消息中携带了所述会议端子 TO的 SDPo信息。
S506: 所述 SIP AS向所述 MS发送创建和加入子会议的 SIP INFO消息, 以指令所述 MSI创建子会议,并在创建后将所述会议端子 T1加入到该子会议 中。
S507: 所述 SIP AS向所述 MS 1发送 INVITE消息, 其中, 在所述 INVITE 消息中包含所述终端 U0的 SDP信息。
S508: 所述 MS1在收到所述 S507中的 INVITE消息后, 创建会议端子 T2, 并且在创建好后, 将该会议端子 T2的 SDP2信息通过 200 OK消息发送给 所述 SIP AS。
S509: 所述 SIP AS在收到所述 200 OK 消息后, 向所述终端 U0发送 RE-INVITE消息, 其中, 所述 RE-INVITE消息中包含所述 T2的 SDP2信息。
S510: 所述 SIP AS对所述 MSI发送加入子会议的 SIP INFO消息, 以指 令所述 MS1将所述会议端子 T2加入到所述子会议中。
此外, 在上述 S502中, 所述 SIP AS在向所述 MS1发送 INVITE消息之 前, 还可以先向所述 MS0发送 BYE (终止呼叫 ) 消息, 以指令所述 MS0释 放所述会议端子 T0。 此时, 则在所述 S504中, 所述 SIP AS可向所述 MS0发 送 INVITE消息来取代所述 S504中的 RE-INVITE消息 , 以指令所述 MS0再 创建一个会议端子, 并且在上述 S505中, 向所述 SIP AS返回的 200 OK消息 中包括新创建的会汉端子的 SDP信息。 其中, S504中所述 INVITE消息中包 含所述 MS1分配的 T1的 SDP信息。
上述实施例, 当有新成员要加入^义, 而该^义所在的 MS中都没有资源 用于分配时, 则可通过将作为根节点 MS中的终端切换到叶子节点, 以释放掉 一定的资源来接入新建的叶子节点 MS, 然后将新成员终端通过新建的叶子节 点 MS加入到该会议中 ,本实施例通过加入新建的叶子节点 MS从而实现对现 有会议规模的扩容。 本发明实现简单, 且适应性强, 能够较大可能地满足各种 规模的 义。
此外, 上述图 5所示实施例中当所述 节点 MS0中的终端 U0处于静音 状态, 则在所述 S506中, 所述 SIP AS除了向所述 MS 1发送创建和加入子会 议的 SIP INFO消息外, 还需要向所述 MS0发送取消静音的 SIP INFO消息, 以指令所述 MS0取消所述终端 U0的静音状态。
在本发明实施例中, 为了避免会议产生回音, 叶子节点 MS上的终端需要 静音, 发言终端则都要分布在根节点 MS上, 因此, 如果叶子节点上有终端需 要发言, 则需要退出所在叶子节点 MS上的子会议, 而加入到根节点 MS上的 主会议中。图 6为本发明一种终端由静音转为发言的切换方法实施例的流程示 意框图,该实施例当叶子节点 MS1上的终端 U1因需要发言而加入才 节点 MS0 时, 包括以下流程:
S601 : SIP AS向所述叶子节点 MS1发送 BYE消息, 以指定所述 MS1释 放所述终端 U1对应的会议端子 T1的资源。
S602: 所述 SIP AS向所述根节点 MS0发送 INVITE消息。 其中, 所述 INVITE消息中包含所述终端 U1的 SDP t息。
S603: 所述 MS0在收到所述 INVITE消息后创建一个会议端子 TO, 并且 为所述会议端子 TO分配分别用于接收和发送音频数据包的 IP端口。 然后,所 述 MS0向所述 SIP AS返回 200 OK消息。 其中, 所述 200 OK消息中携带了 所述会议端子 TO的 SDP。信息, 所述 SDP。信息中包括所述会议端子 T0接收 音频数据包的 IP地址、 端口号和处理媒体的类型。
S604: 所述 SIP AS向所述终端 U1发送 RE-INVITE消息, 其中, 所述 RE-INVITE消息中包含所述会议端子 T0的 SDP0信息。
S605: 所述终端 U1在收到所述 RE-INVITE消息后 , 向所述 SIP AS返回 200 OK消息。 其中, 所述 200 OK消息中包括所述终端 U1的 SDP信息。
S606: 所述 SIP AS向所述 MS0发送加入主会议的 SIP INFO消息, 以指令 所述 MS0将所述会议端子 T0加入到该主会议中。
上述实施例适用于当根节点 MS0上还有足够的资源供所述终端 U1的加 入。 如果 节点 MS0上的资源不够时, 则可在执行外上述 S601动作后, 再通 过图 5所示的方法实施, 加入到根节点 MS0上的主会议中, 在此不再赞述。
此外, 在上述实施例中除了使用 SIP INFO消息来进行如静音等声音设置 夕卜 , 还可由 SIP AS发送的 INVITE消息或者 RE-INVITE消息来控制 , 例如 , 通过更改 INVITE消息或者 RE-INVITE消息中 SDP信息的参数来设置声音状 态, 具体例如: 可将所述 SDP信息中的 m = audio行的 IP设置为 "127.0.0.1" 或者端口号设置为 0来表示声音状态为"静音且哑音"; 或者, 将所述 m行后 的属性行" a"设置为 "recvonly"来表示 "静音", 将所述 "a"设置为 "sendonly"来表 示"哑音", 或者也可以将所述" a"设置为 "sendonly"来表示 "发言且非静音"。 上 述示例只是举例,实际的操作设置并不限于此。这里,静音是指禁止听到声音, 哑音是指禁止发音。
需要说明的是, 上述实施例都是在 SIP协议下的一种实现方法实施例, 但 并不限于此。 另一个实施例中应用在对于 MGCP协议下, 和上述 SIP协议实 现不同的是, 在 MGCP协议中应用服务器指令媒体服务器创建^义端子时, 是发送 CRCX消息来取代上述实施例中的 INVITE消息,而且在为会议创建第 一个会议端子时,会议号不再由应用服务器产生, 而且在媒体服务器在创建会 议端子时, 由所述媒体服务器产生, 并且通过 200 OK消息将所产生的会议号 通知给所述应用服务器 ,以便所述应用服务器能够在以后再指令媒体服务器创 建会议端子时, 能够将所述会议号通过所述 CRCX消息通知给该媒体服务器。
此外, 所述应用服务器在指令媒体服务器将会议端子加入会议,或者设置 媒体服务器及终端的声音状态时,在 MGCP协议中是发送 MDCX消息来取代 上述实施例中的 SIP INFO消息。同时,指令媒体服务器释放资源时,在 MGCP 协议中所述应用服务器用发送 DLCX消息来取代上述实施例中的 BYE消息。
上述实施例采用级联多台媒体服务器的方法,在单台设备无法满足会议需 求时,将多台媒体服务器级联成树形拓朴结构的主从会议, 实现不限终端数量 的大型会议功能,解决了在运营环境下在媒体服务器资源不足的情况下,无法 可靠召开大型会议的问题。本发明对用户而言, 无须考虑会议分布在一台或几 台媒体服务器上,这个^义无论 莫多大, 就在一台集成后的虚拟大媒体服务 器上运行。对于运营商来说,可根椐运营并发用户规模来部署相应数量的媒体 服务器的数量,现存的媒体服务器不论是哪个厂商的,只要提供行业标准接口、 容量参数, 在本方案中均可集成使用。 这也可节省大量设备成本。
基于上述技术方案, 本发明实施例还公开了一种建立音频会议连接的装 置, 该装置可集成在如 SIP AS等应用服务器上, 用于当单台 MS的资源不足 以支撑整个音频会议, 能够根据音频会议的人数规模, 通过将两台以上的 MS 级联, 将所有参加会议的人员都加入到该会议中。 如图 7所述, 为本发明一种 建立音频会议连接的装置结构示意框图, 该装置包括: 分配单元 701、 终端连 接单元 702、 MS连接单元 703, 其中,
所述分配单元 701, 用于根据参加音频会议的终端数量, 分配至少两个媒 体服务器 MS, 从所述 MS中选择一个作为根节点 MS, 其余为叶子节点 MS; 其中,所述分配 MS的数量可根据该音频会议的规模以及每个 MS上的资源承 受范围等因素来确定。
所述终端连接单元 702, 用于将终端分配在由所述分配单元 701所分配得 到的所有 MS上, 并分别建立终端与各自对应的 MS的连接; 其中, 所有终端 连接单元 702可将准备发言的终端都分配在根节点 MS上,其他不发言的终端 分配在这些叶子节点 MS上。 所述建立终端与 MS的连接, 可通过在 MS上创 建与终端相关联的会议端子, 来实现终端与该会议端子的连接。
所述 MS连接单元 703 , 用于将所述分配单元 701中的所有叶子节点 MS 与所述根节点 MS建立连接。 其中 , 所有终端连接单元 702可分别指令在所述 根节点 MS和所述叶子节点 MS上创建相关联的会议端子,通过会议端子之间 的通信来实现所述根节点 MS和所述叶子节点 MS之间的连接。
其中 ,分别在述根节点 MS和所述叶子节点 MS上创建相关联的会议端子 可具体为指令叶子节点 MS创建与根节点 MS 上的会议端子相关联的会议端 子,或者还可以指令根节点 MS创建与叶子节点上的会议端子相关联的会议端 子。 下面结合附图具体说明一下这两种方式对应的装置实施例。
图 8为图 7所示装置实施例中的 MS连接单元 703的具体结构示意框图 , 在该实施例中, 所述 MS连接单元 703可指令叶子节点 MS创建和 节点 MS 上会议端子 TO相关联的会议端子 Tl。在图 7所示的装置实施例的基础上, 所 述 MS连接单元 703包括: 根节点会议端子单元 7031、 第一 MS连接子单元 7032, 其中,
所述根节点会议端子单元 7031,用于向所述分配单元 701中的根节点 MS 发送 INVITE消息, 以指令所述根节点 MS创建会议端子 TO;
所述第一 MS连接子单元 7032, 用于在收到由所述 节点 MS返回的响 应消息后, 向所述分配单元 701 中的叶子节点 MS发送 INVITE消息, 所述 INVITE消息中包含所述根节点 MS所创建的会议端子 TO的 SDP。信息, 以指 令所述叶子节点 MS根据所述 SDP。信息创建与所述根节点 MS的会议端子 TO 相关联的会议端子 Tl。 这样, 两个会议端子 Τ0和 T1都知道了彼此的 SDP信 息, 能够在后续的通信中根据彼此 SDP信息传输相应的数据。 其中, SDP信 息包含会议端子接收音频数据包的 IP地址、 端口号和处理媒体的类型。
图 9为图 7所示装置实施例中的 MS连接单元 703的另一种结构的示意框 图, 在该实施例中, 所述 MS连接单元 703可指令根节点 MS创建和叶子节点 MS上会议端子 T1相关联的会议端子 TO。在图 Ί所示的装置实施例的基础上, 所述 MS连接单元 703包括: 叶子节点会议端子单元 7033、 第二 MS连接子 单元 7034, 其中,
所述叶子节点会议端子单元 7033, 用于向所述分配单元 701 中的所述叶 子节点 MS发送 INVITE消息, 以指令所述叶子节点 MS创建会议端子 T1 ; 所述第二 MS连接子单元 7034, 用于在收到由所述叶子节点 MS返回的 响应消息后, 向所述分配单元 701 中的根节点 MS发送 INVITE消息, 所述 INVITE消息中包含所述叶子节点 MS所创建的会议端子 T1的 SDP t息, 以 指令所述根节点 MS根据所述 SDP ^ 创建与所述叶子节点 MS的会议端子 T1相关联的会议端子 T0。这样, 两个会议端子 TO和 T1都知道了彼此的 SDP 信息, 能够在后续的通信中根据彼此 SDP信息传输相应的数据。 其中, SDP 信息包含会议端子接收音频数据包的 IP地址、 端口号和处理媒体的类型。
上述装置实施例都是针对静态级联的模式, 然而, 当在会议的过程中, 如 果需要加入新成员时,则所述装置还可分别计算加入到该会议中的 MS的是否 还有资源来创建一个会议端子, 若有资源, 则可直接由该装置的终端连接单元 702在有资源的 MS上为待加入的终端分配一个会议端子, 来实现新终端与会 议所在的 MS的连接。
此外, 当与根节点 MS 上相连的终端和叶子节点 MS , 或者与叶子节点 MS相连的终端没有加入到会议中时, 所述装置还用于将没有加入会议的终端 或叶子节点加入会议。 如图 10所示, 为本发明另一种建立音频会议连接的装 置实施例的结构示意框图 ,所述装置在上述图 7所示的装置实施例的基础上还 可包括:
创建和加入会议单元 1001 , 用于在所述分配单元 701 中的根节点 MS上 创建该音频会议的主会议,并将所述根节点 MS上的会议端子加入到所述主会 议中;以及分别在所述分配单元 701中的每个叶子节点 MS上创建该音频会议 的子会议, 并分别将各叶子节点 MS上的会议端子都加入到各自子会议中。 例 如 , 所述创建会议单元 1001可通过向所述根节点 MS发送创建和加入主会议 的 SIP INFO消息, 来指令所述根节点 MS创建主会议, 并且在创建后, 将根 节点 MS上的会议端子加入到该主会议中。可通过向所述叶子节点 MS发送创 建和加入子会议的 SIP INFO消息, 来指令所述叶子节点 MS创建子会议, 并 且在创建后, 将叶子节点 MS上的会议端子加入到该子会议中。
此外, 上述图 10中所述的创建会议单元 1001、 加入会议单元 1002除了 应用于图 7所示装置实施例上外,还可应用于上述图 8或 9所示的装置实施例, 其连接关系与上述图 10所示装置实施例相同, 在此不再赞述。
需要说明的是, 具有上述建立音频会议连接的装置的应用服务器(如 SIP AS )也属于本发明的保护范畴。
此外, 实现方法的级联音频会议系统也属于本发明的保护范畴,该系统包 括至少两个媒体服务器 MS, 其中一个 MS为根节点 MS, 其余 MS为叶子节 点 MS; 所述根节点 MS连接所有叶子节点 MS, 且与至少一个终端相连; 所 述叶子节点 MS与至少一个终端相连。 各 MS的具体工作过程可以参考前文。
此外, 上述实例中的 MS也属于本发明的保护范畴, 该 MS 据参加音频 会议的终端数量, 与至少一个第二 MS相连, 且当所述第二 MS与至少一个终 端相连时, 所述 MS与至少一个终端相连。 所述 MS可以是 节点, 其一种可 能结构是: 由第一连接单元和第二连接单元组成, 其中, 所述第一连接单元用 于建立与终端的连接; 所述第二连接单元, 用于建立与系统中所有其他 MS的 连接。 当然, 所述 MS也可以是叶子节点。
以上所描述的装置实施例仅仅是示意性的 ,其中所述作为分离部件说明的 单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也 可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目 的。本领域普通技术人员在不付出创造性的劳动的情况下,即可以理解并实施。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到本发明 可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬件,但很 多情况下前者是更佳的实施方式。基于这样的理解,本发明的技术方案本质上 或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机 软件产品可以存储在存储介质中, 如 ROM/RAM、磁碟、 光盘等, 包括若干指 令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等) 以上所述的本发明实施方式, 并不构成对本发明保护范围的限定。任何在 本发明的精神和原则之内所作的修改、等同替换和改进等, 均应包含在本发明 的保护范围之内。

Claims

权 利 要 求
1、 一种建立音频会议连接的方法, 其特征在于, 包括:
根据参加音频会议的终端数量, 分配至少两个媒体服务器 MS, 从中选择 一个 MS作为 节点 MS, 其余 MS为叶子节点 MS;
建立所有叶子节点 MS与所述 节点 MS的连接;
建立终端与该终端所在 MS的连接。
2、 如权利要求 1所述的建立音频会议连接的方法, 其特征在于, 所述建 立终端与该终端所在 MS的连接具体为:
将需要发言的终端与所述根节点 MS建立连接。
3、 如权利要求 1所述的建立音频会议连接的方法, 其特征在于, 所述建 立所有叶子节点 MS与所述根节点 MS的连接具体为:
在所述根节点 MS上创建与所述叶子节点 MS数量相同的会议端子,并将 所述会议端子的媒体描述 SDP信息分别通知给对应的叶子节点 MS;
分别在各叶子节点 MS上创建用于与所述根节点 MS上的会议端子通信的 会议端子, 并分别将所创建的会议端子的 SDP信息通知给所述根节点 MS; 其中, 所述 SDP信息包括会议端子接收音频数据包的 IP地址、 端口号和 处理媒体的类型。
4、 如权利要求 1所述的建立音频会议连接的方法, 其特征在于, 所述建 立所有叶子节点 MS与所述根节点 MS的连接具体为:
分别在各叶子节点 MS上创建用于与所述根节点 MS通信的会议端子,并 分别将会议端子的 SDP信息通知给所述根节点 MS;
在所述 节点 MS上分别创建用于与相应叶子节点 MS上的会议端子通信 的会议端子, 并将所创建的会议端子的 SDP信息通知给对应的叶子节点 MS; 其中, 所述 SDP信息包括会议端子接收音频数据包的 IP地址、 端口号和 处理媒体的类型。
5、 如权利要求 1至 4中任一项所述的建立音频会议连接的方法, 其特征 在于, 所述方法还包括:
在所述根节点 MS上创建该音频会议的主会议, 分别在每个叶子节点 MS 上创建该音频会议的子会议; 将所述根节点 MS上的会议端子加入到所述主会议中,分别将各叶子节点 MS上的^义端子都加入到各自子^义中。
6、 如权利要求 5所述的建立音频会议连接的方法, 其特征在于, 当有新 用户终端加入该会议时, 还包括:
当所述 节点 MS有资源供一个新的叶子节点 MS连接时,建立该叶子节 点 MS与所述 节点 MS的连接;
建立该新用户终端与所述新的叶子节点 MS的连接。
7、 如权利要求 5所述的建立音频会议连接的方法, 其特征在于, 还包括: 当所述根节点 MS没有资源供所述新分配的叶子节点 MS连接时将所述根 节点 MS上的一个终端从 ^节点 MS上主会议转移到一个叶子节点 MS上的子 会汉中, 以节省出资源;
利用所述节省出的资源 ,建立该新叶子节点 MS与所述 节点 MS的连接; 建立该新用户终端与所述新的叶子节点 MS的连接。
8、 一种建立音频会议连接的装置, 其特征在于, 包括:
分配单元, 用于根据参加音频会议的终端数量,分配至少两个媒体服务器
MS , 从所述 MS中选择一个作为根节点 MS , 其余为叶子节点 MS;
终端连接单元, 用于建立终端与各自对应的 MS的连接;
MS连接单元, 用于建立所有叶子节点 MS与所述根节点 MS的连接。
9、 如权利要求 8 所述的建立音频会议连接的装置, 其特征在于, 所述 MS连接单元包括:
根节点会议端子单元, 用于向所述根节点 MS发送 INVITE消息, 以指令 所述根节点 MS创建会议端子;
MS连接子单元,用于向所述叶子节点 MS发送 INVITE消息,所述 INVITE 消息中包含所述根节点 MS所创建的会议端子的 SDP信息, 以指令所述叶子 节点 MS根据所述 SDP信息创建会议端子。
10、 如权利要求 Ί 所述的建立音频会议连接的装置, 其特征在于, 所述 MS连接单元包括:
叶子节点会议端子单元, 用于向所述叶子节点 MS发送 INVITE消息, 以 指令所述叶子节点 MS创建会议端子; MS连接子单元,用于向所述根节点 MS发送 INVITE消息,所述 INVITE 消息中包含所述叶子节点 MS所创建的会议端子的 SDP信息, 以指令所述根 节点 MS根据所述 SDP信息创建会议端子。
11、 如权利要求 7至 10中任一项所述的建立音频会议连接的装置, 其特 征在于, 还包括:
创建和加入会议单元, 用于在所述根节点 MS 上创建该音频会议的主会 议, 并将所述根节点 MS上的会议端子加入到该主会议中; 以及分别在所述每 个叶子节点 MS上创建该音频会议的子会议,并分别将各叶子节点 MS上的会 议端子都加入到各自子会议中。
12、一种级联音频会议系统,其特征在于, 包括至少两个媒体服务器 MS, 其中一个 MS为才 节点 MS, 其余 MS为叶子节点 MS;
所述根节点 MS连接所有叶子节点 MS, 且与至少一个终端相连; 所述叶子节点 MS与至少一个终端相连。
13、 一种级联音频 义系统的媒体服务器 MS, 其特征在于, 根据参加音 频会议的终端数量, 所述 MS与至少一个第二 MS相连, 且当所述第二 MS与 至少一个终端相连时, 所述 MS与至少一个终端相连。
14、 如权利要求 13所述的 MS, 其特征在于, 包括:
第一连接单元, 用于建立与终端的连接;
第二连接单元, 用于建立与系统中所有其他 MS的连接。
PCT/CN2009/070237 2008-01-31 2009-01-21 一种建立音频会议连接的方法和装置 WO2009097792A1 (zh)

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