WO2013128827A1 - 電子会議システム、帯域管理方法および帯域管理プログラムが格納された記憶媒体 - Google Patents
電子会議システム、帯域管理方法および帯域管理プログラムが格納された記憶媒体 Download PDFInfo
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- WO2013128827A1 WO2013128827A1 PCT/JP2013/000819 JP2013000819W WO2013128827A1 WO 2013128827 A1 WO2013128827 A1 WO 2013128827A1 JP 2013000819 W JP2013000819 W JP 2013000819W WO 2013128827 A1 WO2013128827 A1 WO 2013128827A1
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- conference
- exchange system
- switching system
- mixing device
- video
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1813—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for computer conferences, e.g. chat rooms
- H04L12/1827—Network arrangements for conference optimisation or adaptation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1083—In-session procedures
- H04L65/1086—In-session procedures session scope modification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/403—Arrangements for multi-party communication, e.g. for conferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/403—Arrangements for multi-party communication, e.g. for conferences
- H04L65/4038—Arrangements for multi-party communication, e.g. for conferences with floor control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/567—Multimedia conference systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
- H04N7/152—Multipoint control units therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
Definitions
- the present invention relates to an electronic conference system, a bandwidth management method, and a bandwidth management program, and in particular, an electronic conference system and a bandwidth management method capable of reducing a used bandwidth even in the case of a video conference or an audio conference across bases. And a bandwidth management program.
- FIG. 4 is a network connection diagram for explaining a network connection configuration when a video conference is performed across bases in a conventional electronic conference system.
- the first exchange system 10A and the second exchange system 20A are connected via the Internet 30.
- a multifunction telephone 100 is connected to the first exchange system 10A as a terminal used by a user who wants to host a video conference.
- the second exchange system 20A has a first exchange system 10 side.
- Multi-function telephones 200 and 201 are connected as terminals used by two users who intend to participate in a video conference hosted by the user of the multi-function telephone 100.
- the multi-function phone used by the organizer 100 is connected to the video conference mixing device 11A of the first switch system 10A, and the multi-function telephones 200 and 201 used by the participants in the video conference are videos installed in the second switch system 20A.
- the second exchange system 20A and the Internet 30 are connected to the video conference mixing device 11A of the first exchange system 10A.
- the video conference mixing device 11A of the first exchange system 10A the three parties of voice / Video (video) from the multi-function telephone 100, voice / Video from the multi-function telephone 200, and voice / Video from the multi-function telephone 201
- the conference communication information is mixed and distributed to the multi-function telephones 100, 200, and 201, thereby forming a video conference network between the three parties.
- the network is equivalent to the number of conference participants that exist at other bases different from the meeting organizer.
- a bandwidth (audio / video (audio + video) bandwidth in the case of a video conference) is required, and when the available bandwidth is narrow, it is difficult to conduct a video conference or audio conference across bases. There is.
- the present invention has been made in view of such a problem, and is an electronic conference system, a bandwidth management method, and a bandwidth management program capable of reducing the used bandwidth even in a video conference or an audio conference across bases.
- the purpose is to provide.
- the electronic conference system, the bandwidth management method, and the bandwidth management program according to the present invention mainly adopt the following characteristic configuration.
- the electronic conference system is used by a first exchange system that connects a terminal of a conference organizer that hosts a conference and a conference participant who participates in a conference conducted by the conference organizer across different locations.
- the conference organizer is connected to the same exchange system as the second exchange system on the conference participant side.
- the bandwidth management method according to the present invention is used by a first switch system that connects a terminal of a conference organizer that hosts a conference and a conference participant who participates in a conference conducted by the conference organizer across different locations.
- a bandwidth management method for a network bandwidth in an electronic conference system having a configuration in which a second switching system that connects terminals to be connected via a network is the same as the second switching system on the conference participant side
- the mixing device provided in the second exchange system may include a plurality of conference participations.
- the communication information for conference from the person's terminal is mixed in advance and edited into one communication information for conference, and the first exchange on the conference organizer side And transmitting relative mixing device provided in the stem.
- the bandwidth management program according to the present invention is characterized in that at least the bandwidth management method described in (2) is implemented as a program executable by a computer.
- the bandwidth management method, and the bandwidth management program of the present invention the following effects can be achieved.
- a plurality of conference participants who connected their respective terminals to the same second switching system (base) tried to participate in a conference held by the organizer of the first switching system (base), and then a plurality of conference participants Even when accessing the conference system (mixing device) in the first exchange system on the conference organizer side, the first exchange system on the conference participant side and the second exchange system on the conference organizer side It is possible to save the network bandwidth for the conference between.
- a network bandwidth for the conference between the second exchange system on the conference participant side and the first exchange system on the conference organizer side a network bandwidth corresponding to the number of conference participants to be accessed is not required.
- conference communication information audio information and video information
- the second exchange system on the conference participant side Since it is possible to mix in advance using one of the mixing devices and combine the information into one conference communication information and handle it as one communication session, the required network bandwidth for the conference can be determined by the number of conference participants. Regardless of the case, the network bandwidth can be limited to only one session.
- FIG. 3A It is a network connection figure explaining the network connection condition in the case of performing a video conference across bases in the electronic conference system by this invention.
- FIG. 3C It is an internal block diagram which shows an example of an internal structure of the 1st switching system shown in FIG.
- FIG. 3B It is a sequence chart for demonstrating an example of operation
- the upper edge of this figure continues the lower edge of FIG. 3A, The lower edge is followed by the upper edge of FIG. 3C).
- the bandwidth management method may be implemented as a bandwidth management program that can be executed by a computer, or bandwidth management. Needless to say, the program may be recorded on a computer-readable recording medium.
- the organizers of the conference such as video conference and audio conference exist.
- the communication information for the conference from each terminal of the conference participant is mixed in the same second exchange system to which the terminals of the plurality of conference participants are connected, and collected into one conference communication information.
- the main feature is that the data is transferred to the first exchange system to which the terminal of the conference organizer is connected.
- a plurality of network bandwidths are required for the number of conference participants who participate via the network.
- the number of conference participants is the same. Regardless of this, it is sufficient to allocate only one network band, and a video conference and an audio conference can be performed across bases even in a narrow band network.
- a conference participant of a video conference or an audio conference is connected to the telephone set A-1 under the exchange system A and the exchange system B.
- a video conference or an audio conference is performed using the telephone set B-1, the telephone set B-2, the telephone set C-1 under the exchange system C, and the telephone set C-2, for example, the user of the telephone set A-1 is the conference organizer. Therefore, when the exchange system A becomes the first exchange system on the conference organizer side and performs the conference by mixing, in the conventional electronic conference system, the exchange system A is exchanged between the exchange system A and the exchange system B. In addition, two sessions are required between the exchange system A and the exchange system C, respectively.
- the switching system B mixes the video information and audio information of the telephones B-1 and B-2 under the switching system B, and the switching system C subordinates.
- the video system information and audio information of the telephones C-1 and C-2 are mixed by the switching system C and transmitted to the switching system A. Therefore, between the switching system A and the switching system B, Regardless of the number of conference participants, it is sufficient to allocate a single session between the switch system A and the switch system C, regardless of the number of conference participants, thus reducing network bandwidth. Thus, effective use of network resources can be achieved.
- FIG. 1 is a network connection diagram illustrating a network connection configuration when a video conference is performed across bases in the electronic conference system according to the present invention.
- the first switch system 10 and the second switch system 20 are connected via the Internet 30 as in the case of FIG. 4 described in the background art.
- a multifunction telephone 100 is connected to the first exchange system 10 as a terminal used by a user who wants to host a video conference.
- the second exchange system 20 is connected to the first exchange system 10 side.
- Multi-function telephones 200 and 201 are connected as terminals used by two users who intend to participate in a video conference hosted by the user of the multi-function telephone 100.
- the multi-function telephone 100 When three of the multi-function telephones 100, 200, 201 having a video call capability perform a video conference by using the video conference mixing device 11 installed in the first exchange system 10 on the conference organizer side,
- the multi-function telephone 100 is connected to the video conference mixing device 11 of the first exchange system 10, and the multi-function telephones 200 and 201 are different from the case of FIG. 4 described in the background art in the second exchange system 20.
- the video conference video signals from the multi-function telephones 200 and 201 are mixed and combined into one video conference video signal.
- the session 210a is transmitted to the video conference mixing apparatus 11 of the first exchange system 10.
- the video conference mixing apparatus 11 further mixes the video conference video signal from the multi-function telephone 100 and distributes it to each of the multi-function telephones 100, 200, and 201.
- only one session 201a is set between the first switching system 10 and the second switching system 20, and a network for three-party video conferencing across different bases is formed. .
- the video conference mixing device 21 in the second switching system 20 mixes not only two video conference video signals but also three or more video conference video signals into one video conference video signal.
- the first switching system 10 and the second switching system 20 may be arranged between the first switching system 10 and the second switching system 20 regardless of the number of participants in the conference if the mixing performance can be summarized. It is also possible to hold a multi-party video conference of three or more people across different bases by setting only one session 201a between the exchange systems 20 of the two.
- the video conference mixing apparatuses 11 and 21 mix video signals for video conference from a plurality of multi-function telephones 100, 200, and 201 and distribute them to the multi-function telephones 100, 200, and 201, respectively.
- MCU Multipoint Control Unit: Multipoint connection
- the IP address “172.16.100” is assigned to the first exchange system 10 as the network address for call control in the Internet 30, and the second exchange system 20 is assigned to the second exchange system 20. Assume that the IP address “172.6.1.100” is assigned.
- FIG. 2 is an internal configuration diagram showing an example of the internal configuration of the first switching system 10 shown in FIG. 1, but other switching systems 20 such as the second switching system 20 other than the first switching system 10 shown in FIG.
- the internal configuration of the exchange system has the same configuration as that of FIG.
- the first switching system 10 includes at least a call control IP packet processing unit 300, an RTP packet processing unit 301, a call control unit 302, a video conference mixing device 304, and a database 305. It consists of The video conference mixing device 304 in the first exchange system 10 is the same device as the video conference mixing device 11 in the first exchange system 10 shown in FIG.
- the call control IP packet processing unit 300 is connected to the Internet 30 via a LAN (Local Area Network) cable, and has a function of transmitting and receiving IP packets to and from the Internet 30. Is assigned to each switching system uniquely, and the IP address “172.16.100” is assigned to the call control IP packet processing unit 300 on the first switching system 10 side. Then, the IP address “172.6.1.100” is assigned to the call control IP packet processing unit 300 on the second switching system 20 side.
- LAN Local Area Network
- the RTP packet processing unit 301 is also connected to the Internet 30 via a LAN cable, and an RTP (Real-Time Transport Protocol) IP packet that is a communication protocol for transferring video data and audio data to and from the Internet 30 in real time. And an IP address for RTP packet transmission / reception is uniquely assigned to each switching system. Also, it has a function of transmitting RTP data of the received RTP packet to the video conference mixing device 304 and transferring the received RTP packet to a designated IP address.
- RTP Real-Time Transport Protocol
- the call control unit 302 receives and analyzes a call control message conforming to the session establishment protocol SIP (Session Initiation Protocol) and the video compression standard H.323 from the call control IP packet processing unit 300, and is stored in the database 305. It has a function to control the destination based on the extension number information.
- SIP Session Initiation Protocol
- H.323 Video compression standard
- the database 305 stores extension number information registered in the first exchange system 10, number information of the opposite exchange system, number information of the video conference mixing device 304, and the like, and is accessed from the call control unit 302. It has a function. It also has a function of writing and storing IP address information received as a video conference call control message as a video conference participant list.
- FIG. 3 is a sequence chart for explaining an example of the operations of the first exchange system 10 and the second exchange system 20 shown in FIGS. 1 and 2, and the first exchange system 10 for video conferencing
- SIP Session Initiation Protocol
- FIG. 3 is inevitably divided into FIG. 3A, FIG. 3B, and FIG. 3C because of the limitation of the size of the paper surface in the drawing. That is, FIG. 3 is a diagram configured by sequentially connecting FIGS. 3A, 3B, and 3C.
- the first exchange system 10 the video conference mixing device 11 mounted in the first exchange system 10
- the first 2 switch system the video conference mixing device 21 installed in second switch system 20
- multi-function telephone 100 connected to first switch system 10
- second switch system 20 the call control signals (messages) and RTP packets exchanged in each of the multi-function telephones 200 and 201 are shown in chronological order.
- the number for video conferencing of the first switching system 10 is set as extension '9000', and the telephone number is set to '03 -1234-1111 'in the first switching system 10.
- the call control system of the first switching system 10 is set to receive an extension number 9000 (video conference number) when an external line number “03-1234-1111” is received in the SIP trunk.
- the user A who hosts the video conference raises (off-hooks) the handset of the multi-function telephone 100 connected to the first exchange system 10, and dials “9000”. Dial.
- the multi-function telephone 100 Based on the session establishment protocol SIP, the multi-function telephone 100 creates an Invite message in which the extension number information “9000” is set in the To header, and uses it as a session description protocol SDP (Session Description Protocol) information for video conferencing.
- SDP Session Description Protocol
- the first switching system 10 receives an IP packet (Invite with SDP) from the multi-function telephone 100 in the call control IP packet processing unit 300 and uses the data part of the received IP packet (Invite with SDP) as a call control unit. 302 is output.
- the call control unit 302 analyzes the data received from the call control IP packet processing unit 300, recognizes it as a SIP Invite message, and further analyzes the number information of the Invite message to obtain an extension number “9000”. It is determined that the incoming call is (video conference) (sequence Seq2).
- the call control unit 302 that has determined that an incoming video conference has received the video conference IP address “172.16.100” and the port number “1010” from the multi-function telephone 100 as a video conference participant list.
- the data is stored in the database 305 (sequence Seq3), and a connection instruction to the multi-function telephone 100 is sent to the video conference mixing device 304 (MCU), that is, the video conference mixing device 11 in the first exchange system 10 ( Sequence Seq4).
- the call control unit 302 transmits the response to the multifunction telephone 100 that is the transmission source of the IP packet (Invite with SDP) as the IP address of the connection destination of the RTP packet (voice / Video) as SDP information.
- / 200OK (200OK with SDP) including port information is created and output to the IP packet processing unit 300 for call control.
- the call control IP packet processing unit 300 edits the received 200 OK into an IP packet (200 OK with SDP), and sends it to the multi-function telephone 100 instructed by the call control unit 302. Transmit (sequence Seq5).
- the multi-function telephone 100 that has received the IP packet (200 OK with SDP) from the first switching system 10 creates an RTP packet (voice / Video) for video conferencing and is attached to 200 OK (200 OK with SDP). Using the IP address / port information, an operation of transmitting to the first exchange system 10 is started.
- the video conference mixing device 304 in the first switching system 10 that is, the video conference mixing device 11, which has received the connection instruction from the call control unit 302 to the multi-function telephone 100, sends an RTP packet to the RTP packet processing unit 301.
- (Voice / Video) starts to be output.
- the RTP packet processing unit 301 transfers the RTP packet from the video conference mixing device 304 in the first switching system 10, that is, the video conference mixing device 11 to the multi-function phone 100 and receives it from the multi-function phone 100.
- a communication link for transferring the RTP packet (voice / Video) to the video conference mixing device 304 in the first exchange system 10, that is, the video conference mixing device 11, is established (sequence Seq6).
- the user B who intends to participate in the video conference hosted by the user A raises the handset of the multi-function telephone 200 connected to the second exchange system 20 (off-hooks), and acquires the outside line acquisition special number '0. Dial "0-03-123411 1" with "'.
- the multi-function telephone 200 creates an Invite message in which the external line number information “003123441111” is set in the To header based on the session establishment protocol SIP, and uses the IP address “172. It is set in the format of an IP packet (Invite with SDP) to which 16.0.100 'and port number' 1010 'are assigned, and is transmitted to the second exchange system 20 (sequence Seq7).
- the second switching system 20 receives the IP packet (Invite with SDP) from the multi-function telephone 200 in the call control IP packet processing unit 300 and uses the data part of the received IP packet (Invite with SDP) as the call control unit. 302 is output.
- the call control unit 302 analyzes the data received from the call control IP packet processing unit 300, recognizes it as a SIP Invite message, and further analyzes the number information of the Invite message to obtain the first switching system. 10 is determined to be a call to the external line number “03-1234-1111” (sequence Seq8).
- the call control unit 302 that has determined that the outside line is transmitted originates the outside line for the first switching system 10 as the session 1 (sequence Seq9), and the first switching system 10 is set as the destination based on the session establishment protocol SIP.
- An Invite message in which the external line number information of “0312341111” is set, and the IP address “172.16.1.10” and the port number of the second exchange system 20 for video conferencing are used as the session description protocol SDP information. 10020 ′ and output to the call control IP packet processing unit 300.
- the call control IP packet processing unit 300 Upon receiving the Invite message from the call control unit 302, the call control IP packet processing unit 300 sets the external line number information “0312341111” in the To header, and uses the second exchange system for video conferencing as the session description protocol SDP information. Set the IP packet (Invite with SDP) format with 20 IP addresses '172.6.1.100' and port number '10020', and use the session 1 that was captured, Transmission to the exchange system 10 (sequence Seq10).
- the first switching system 10 receives the IP packet (Invite with SDP) from the second switching system 20 in the call control IP packet processing unit 300 and calls the data portion of the received IP packet (Invite with SDP). Output to the control unit 302.
- the call control unit 302 analyzes the data received from the call control IP packet processing unit 300, recognizes it as a SIP Invite message, and further analyzes the number information '0312341111' of the Invite message to obtain an extension number. It is determined that the incoming call is “9000” (video conference) (sequence Seq11).
- the call control unit 302 that has determined that the incoming call is to the extension number “9000” (video conference) has received the IP address “172. 1.1.1.100” from the second switching system 20 included in the Invite message. And the port number '10020' as a video conference participant list in the database 305 (sequence Seq12), the video conference mixing device 304 (MCU) in the first exchange system 10, that is, the video conference mixing device 11 is stored. Then, a connection instruction to the second exchange system 20 is output (sequence Seq13).
- the call control unit 302 of the first switching system 10 transmits a response to the second switching system 20 that is the transmission source of the IP packet (Invite with SDP), that is, the connection request source of RTP (voice / video). Therefore, 200 OK (200 OK with SDP) including the IP address / port information of the connection destination of the RTP packet (voice / Video) is created as SDP information and output to the IP packet processing unit 300 for call control To do.
- the call control IP packet processing unit 300 that has received 200 OK transmits the received 200 OK to the second switching system 20 instructed by the call control unit 302 using the session 1 that has received the IP packet (Invite with SDP). Then, the data is transmitted (sequence Seq14).
- the video conference mixing device 304 in the first switch system 10 that is, the video conference mixing device 11 that has received the connection instruction from the call control unit 302 of the first switch system 10 to the second switch system 20 is an RTP packet.
- Output of an RTP packet (voice / Video) to the processing unit 301 is started.
- the second switching system 20 that has received the 200 OK message from the first switching system 10 also creates an RTP packet (voice / Video) for video conferencing and transmits it to the first switching system 10. To start.
- the RTP packet processing unit 301 of the first exchange system 10 converts the RTP packet (voice / Video) from the video conference mixing apparatus 304 in the first exchange system 10, that is, the video conference mixing apparatus 11, into the second exchange.
- the RTP packet (voice / Video) received from the second switching system 20 side is transferred to the video conference mixing device 304 in the first switching system 10, that is, the video conference mixing device 11.
- a communication link is established (sequence Seq15).
- the second switching system 20 receives the IP packet (200 OK with SDP) from the first switching system 10 in the call control IP packet processing unit 300 and the data portion of the received IP packet (200 OK with SDP). Is output to the call control unit 302.
- the call control unit 302 analyzes the data received from the call control IP packet processing unit 300 and recognizes it as a SIP 200 OK message.
- the call control unit 302 of the second switching system 20 that has recognized the reception of the 200 OK message from the first switching system 10 sends an RTP packet (voice to the RTP packet processing unit 301 to the first switching system 10.
- / Video instruction to transmit and IP packet to instruct transmission of RTP packet (voice / Video) to multi-function telephone 200 that is the source of IP packet for video conference (Invite with SDP) (200 OK with SDP) is transmitted (sequence Seq16).
- the call control unit 302 of the second switching system 20 transfers the RTP packet (voice / Video) transmitted from the multi-function telephone 200 to the first switching system 10 to the RTP packet processing unit 301.
- Output instructions
- the RTP packet processing unit 301 of the second switching system 20 transfers the RTP packet (voice / Video) from the first switching system 10 to the multifunction telephone 200 side and receives it from the multifunction telephone 200 side.
- the communication link for transferring the RTP packet (voice / Video) to the first exchange system 10 is established (sequence Seq17).
- the RTP packet processing unit 301 of the second switching system 20 transfers the RTP packet (voice / Video) from the first switching system 10 to the multifunction telephone 200 side, and conversely from the multifunction telephone 200 side.
- the RTP packet transfer operation for transferring the received RTP packet (voice / Video) to the first switching system 10 is started (sequence Seq18).
- user C who wants to participate in a video conference hosted by user A also raises (off-hooks) the handset of multifunction telephone 201 connected to second switch system 20 to As in the case of B, dial “0-03-1234-1111” to which the outside line capturing special number “0” is assigned is dialed.
- the multi-function telephone 201 Similar to the operation of sequence Seq7 in the case of the multi-function telephone 200, the multi-function telephone 201 creates an Invite message in which the external line number information “003123441111” is set in the To header based on the session establishment protocol SIP, and the session description As the protocol SDP information, the second exchange system 20 is set in the format of an IP packet (Invite with SDP) to which the IP address “172.16.100” for video conferencing and the port number “1010” are assigned. (Sequence Seq19).
- the second switching system 20 receives the IP packet (Invite with SDP) from the multi-function telephone 201 in the call control IP packet processing unit 300 and uses the data part of the received IP packet (Invite with SDP) as the call control unit. 302 is output.
- the call control unit 302 analyzes the data received from the call control IP packet processing unit 300 and recognizes it as a SIP Invite message, as in the operation of the sequence Seq8 in the case of the multi-function telephone 200, and further, the Invite The number information of the message is analyzed, and it is determined that the transmission is to the external line number “03-1234-1111” for the first switching system 10 (sequence Seq20).
- the call control unit 302 that has determined that the outgoing call is outgoing has already acquired the session 1 in the sequence Seq9 in the case of the multi-function telephone 200, and therefore acquires the external line for the first switching system 10 as the session 2 (sequence Seq21). ), Based on the session establishment protocol SIP, creates an Invite message in which the external line number information “0312341111” destined for the first switching system 10 is set as the session description protocol SDP information. IP address '172.6.1.100' and port number '10020' of the switching system 20 are assigned to the IP packet processing unit 300 for call control.
- the call control IP packet processing unit 300 that has received the Invite message from the call control unit 302 sets the external line number information “0312341111” in the To header, similarly to the operation of the sequence Seq10 in the case of the multi-function telephone 200, and the session description.
- the protocol SDP information is set in the format of an IP packet (Invite with SDP) to which the IP address “172.61.100” and the port number “10040” of the second exchange system 20 for video conferencing are assigned.
- the session 2 that has been captured is transmitted to the first switching system 10 (sequence Seq22).
- the session and port number used when exchanging information between the first exchange system 10 and the second exchange system 20 are different from the session 1 and port number '10020' in the case of the multi-function telephone 200.
- session 2 and port number '10040' are used, other operations are the same as the operations of sequences Seq11 to Seq18 in the case of multi-function telephone 200 (sequences Seq23 to Seq30).
- the video conference mixing device 304 in the first exchange system 10 on the conference organizer side that is, the video conference mixing device 11 is used as the conference system, and the multifunction telephone 100 connected to the first exchange system 10 is used.
- a video conference connection configuration is formed across different sites.
- the first exchange to which the multi-function telephone 100 used by the organizer user A is connected The call control unit 302 of the system 10 participates by using a multi-function telephone connected to the same switching system, for example, the second switching system 20, which is another switching system different from the first switching system 10. It is confirmed whether there are multiple persons.
- the call control unit 302 of the first switching system 10 refers to the video conference participant list as exemplified in Table 1 stored in the database 305 and refers to the IP address of the first switching system 10. It is confirmed whether or not the same IP address exists as an IP address different from '172.16.0.100' (sequence Seq31). When the same IP address exists, there are a plurality of participants using the multi-function telephone connected to the same switching system, and one participant is connected to the first switching system 10. This means that a plurality of sessions are used for video conferencing, and the network bandwidth corresponding to the number of participants in the video conferencing is being used.
- Table 1 shows registration contents stored as a video conference participant list in the database 305 in each of the sequences Seq3, Seq12, and Seq24.
- the call control unit 302 of the first switching system 10 uses the RTP packets (voice / video) for video conferencing using session 1 and session 2 respectively in order to reduce the network bandwidth used for video conferencing. ) To generate a SIP info message that requests switching to a transfer operation using one session, and outputs it to the IP packet processing unit 300 for call control. Instructing the second switching system 20 (IP address '172. 6.1.100') that has acquired one session to transmit.
- the call control IP packet processing unit 300 of the first switching system 10 transmits the SIP info message (mixing request) received from the call control unit 302 to the instructed second switching system 20 in order to transmit the IP info message.
- a packet (info message) is edited and transmitted to the second switching system 20 using either session 1 or session 2 (sequence Seq32).
- the second switching system 20 receives the IP packet (info message) from the first switching system 10 in the call control IP packet processing unit 300 and uses the data part of the received IP packet (info message) as the call control unit. 302 is output.
- the call control unit 302 analyzes the data received from the call control IP packet processing unit 300 and recognizes it as a SIP info message (mixing request).
- the call control unit 302 of the second exchange system 20 that has recognized the reception of the info message (mixing request) from the first exchange system 10 sends the IP packet (info message) transmission source to the first exchange system 10.
- a 200 OK message is created and output to the call control IP packet processing unit 300.
- the call control IP packet processing unit 300 that has received the 200 OK message edits the received 200 OK message into an IP packet (200 OK), and uses the session 1 or session 2 that has received the IP packet (info message) to call Transmission to the first switching system 10 instructed by the control unit 302 (sequence Seq33).
- the call control unit 302 of the second switching system 20 receives RTPs respectively transmitted from the multi-function telephone 200 and the multi-function telephone 201 in order to perform the mixing operation instructed by the first switching system 10.
- the transfer destination of the packet (voice / Video) is switched to the video conference mixing device 304 in the second switch system 20, that is, the video conference mixing device 21, instead of the first switch system 10. That is, RTP packets (voice / video) respectively transmitted from the multi-function telephone 200 and the multi-function telephone 201 to the RTP packet processing unit 301 are converted into video conference mixing devices 304 in the second exchange system 20. That is, an instruction to transfer to the video conference mixing apparatus 21 is output.
- the call control unit 302 of the second switching system 20 is transferred from the RTP packet processing unit 301 to the video conference mixing device 304 in the second switching system 20, that is, the video conference mixing device 21.
- An instruction to mix two RTP packets (voice / Video) from the multi-function telephone 200 and the multi-function telephone 201 and combine them into one RTP packet (voice / Video) is output, and the mixed RTP packets (voice / Video) Video) is sent to the RTP packet processing unit 301.
- the video conference mixing device 304 in the second switching system 20 Upon receiving the instruction from the call control unit 302 of the second switching system 20, the video conference mixing device 304 in the second switching system 20, that is, the video conference mixing device 21, receives from the multi-function telephone 200 and the multi-function telephone 201.
- the two RTP packets (voice / Video) are mixed, combined into one RTP packet (voice / Video), and sent back to the RTP packet processing unit 301 (sequence Seq34).
- the RTP packet processing unit 301 that has received the mixed RTP packet (voice / Video) from the video conference mixing device 304, that is, the video conference mixing device 21 in the second switching system 20, mixes the RTP packet (voice / Video). Is transferred to the first exchange system 10 by the RTP session formed by using one of the sessions 1 and 2, for example, the session 2.
- the call control unit 302 of the second switching system 20 starts an operation of releasing a session that is no longer necessary as the session for the three-party video conference, for example, the session 1. That is, the call control unit 302 of the second switching system 20 creates a SIP Bye message for disconnecting an unnecessary session, for example, the session 1, for the first switching system 10, and performs call control.
- the data is output to the IP packet processing unit 300.
- the call control IP packet processing unit 300 that has received the Bye message edits the received Bye message into an IP packet (Bye message), and instructs the call control unit 302 to use the session to be disconnected, for example, session 1. Is transmitted to the first exchange system 10 that has been made (sequence Seq35).
- the first switching system 10 receives an IP packet (Bye message) from the second switching system 20 in the call control IP packet processing unit 300 and uses the data part of the received IP packet (Bye message) as a call control unit. 302 is output.
- the call control unit 302 analyzes the data received from the call control IP packet processing unit 300 and recognizes the SIP message as a Bye message (session 1) for session 1, for example.
- the call control unit 302 of the first switching system 10 that has recognized the reception of the Bye message (session 1) from the second switching system 20 performs the video conference mixing device 304 in the first switching system 10, that is, the video conference mixing.
- the apparatus 11 is instructed to stop the operation of outputting the RTP packet (voice / Video) to the second switching system 20 using the session 1 (sequence Seq36), and is registered in the database 305 as a conference list. Rewrite information related to session 1 to session 2.
- the call control unit 302 of the first switching system 10 creates a 200 OK message to transmit a response to the second switching system 20 that is the transmission source of the IP packet (Bye message), and performs call control.
- the call control IP packet processing unit 300 that has received the 200 OK message edits the received 200 OK message into an IP packet (200 OK), and uses the session 1 that has received the IP packet (Bye message) to use the call control unit 302. Is transmitted to the second switching system 20 instructed by the server 1 to disconnect the session 1 (sequence Seq37).
- the video conference mixing apparatus is configured to enable a video conference of three or more persons. If it is, it is not limited to the case of only two people, and even when there are three or more participants, it can be handled in exactly the same way. Furthermore, even when there are a plurality of participants at each of a plurality of bases different from the base where the organizer is present, it can be handled in exactly the same way.
- a network bandwidth corresponding to the number of conference participants to be accessed is required.
- RTP packets communication information for conference: audio information and video information
- the conference system video conference mixing device 304 in the second exchange system 20 in advance, it is possible to combine them into one RTP packet (conference communication information) and handle it as one communication session. Therefore, the required network bandwidth for the conference can be set for one session regardless of the number of conference participants. It can be suppressed only to over-click zone.
- the present invention has been described as a hardware configuration, but the present invention is not limited to this.
- the present invention can also realize arbitrary processing by causing a CPU (Central Processing Unit) to execute a computer program.
- the computer program can be provided by being recorded on a recording medium, or can be provided by being transmitted via the Internet or another communication medium.
- the storage medium includes, for example, a flexible disk, a hard disk, a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD, a ROM cartridge, a battery-backed RAM memory cartridge, a flash memory cartridge, and a nonvolatile RAM cartridge.
- the communication medium includes a wired communication medium such as a telephone line, a wireless communication medium such as a microwave line, and the like.
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Abstract
Description
本発明は、かかる問題に鑑みてなされたものであり、拠点間を跨ったビデオ会議や音声会議であっても、使用帯域を節減することが可能な電子会議システム、帯域管理方法および帯域管理プログラムを提供することを、その目的としている。
本発明の実施形態の説明に先立って、本発明の特徴についてその概要をまず説明する。本発明は、複数の交換機システム間に跨ってビデオ会議や音声会議を実施する場合、会議参加者側の第2の交換機システムから会議主催者側の第1の交換機システムにネットワークを介してビデオ通話や音声通話の会議用通信情報を転送する際に、第2の交換機システムの複数の会議参加者からの映像信号や音声信号を、該当するそれぞれの第2の交換機システム内のミキシング装置によって1つの映像信号や1つの音声信号にミキシングして、第1の交換機システムに送信することを主要な特徴としている。
次に、本発明の交換機システムの構成例について、図面を参照しながら詳細に説明する。なお、以下の説明においては、会議の種類として、拠点間を跨ってビデオ会議を行う場合を例にとって説明するが、拠点化を跨って音声会議を行う場合についても全く同様に実施することができることは言うまでもない。まず、図1を用いて、本発明による交換機システムによってビデオ会議を、拠点間を跨って実施する場合のネットワーク接続構成について説明する。図1は、本発明による電子会議システムにおいて拠点間を跨ってビデオ会議を行う場合のネットワーク接続構成を説明するネットワーク接続図である。
次に、図1、図2に示した本発明の交換機システムの動作について、その一例を、図3のシーケンスチャートを用いて説明する。図3は、図1、図2に示した第1の交換機システム10、第2の交換機システム20の動作の一例を説明するためのシーケンスチャートであり、ビデオ会議用の第1の交換機システム10、第2の交換機システム20の交換動作を実施するための呼制御プロトコルとして、セッション確立プロトコルSIP(Session Initiation Protocol)を用いている場合について示している。図3は、図示における紙面の大きさの制限上、止むを得ず図3A、図3Bおよび図3Cに分割して描いてある。つまり、これら図3A、図3Bおよび図3Cを順に繋げて構成される図が図3である。
以上に詳細に説明したように、本実施形態においては、次のような効果が得られる。
10A 第1の交換機システム
11 ビデオ会議ミキシング装置
11A ビデオ会議ミキシング装置
20 第2の交換機システム
20A 第2の交換機システム
21 ビデオ会議ミキシング装置
21A ビデオ会議ミキシング装置
30 インターネット
100 多機能電話機
200 多機能電話機
200a セッション
201 多機能電話機
201a セッション
210a セッション
300 呼制御用IPパケット処理部
301 RTPパケット処理部
302 呼制御部
304 ビデオ会議ミキシング装置
305 データベース
Claims (9)
- 会議を主催する会議主催者の端末を接続する第1の交換機システムと、異なる拠点を跨って前記会議主催者が行う会議に参加する会議参加者が使用する端末を接続する第2の交換機システムとを、ネットワークを介して接続した構成からなる電子会議システムにおいて、前記会議参加者側の前記第2の交換機システムとして同一の交換機システムに、前記会議主催者の会議に参加する複数の前記会議参加者の端末が接続されている場合には、当該第2の交換機システム内に備えたミキシング装置において、複数の前記会議参加者の端末からの会議用通信情報をあらかじめミキシングして1つの会議用通信情報に編集して、前記会議主催者側の前記第1の交換機システム内に備えたミキシング装置に対して送信することを特徴とする電子会議システム。
- 前記会議参加者側の前記第2の交換機システムとして同一の交換機システム内に、前記会議主催者の会議に参加する複数の前記会議参加者の端末が接続されているか否かを判別するために、前記会議主催者側の前記第1の交換機システム内に、少なくとも、会議に参加しようとする前記会議参加者の端末が接続されている前記第2の交換機システムをユニークに特定するアドレスを参加者リストとしてあらかじめ登録するデータベースを備えていることを特徴とする請求項1に記載の電子会議システム。
- 前記会議主催者側の前記第1の交換機システムにおいて、前記参加者リストに、前記会議参加者側の前記第2の交換機システムを特定するアドレスとして同一のアドレスが登録されたことを検出した場合、前記第1の交換機システムから該当する前記第2の交換機システム側に対して、複数の前記会議参加者の端末からの会議用通信情報をあらかじめミキシングして1つの会議用通信情報に編集して、1つに編集した該会議用通信情報を当該第1の交換機システム側に送信することを要求するというミキシング要求を送信することを特徴とする請求項2に記載の電子会議システム。
- 前記会議参加者側の前記第2の交換機システムにおいて、前記第1の交換機システムからの前記ミキシング要求を受信した際に、複数の前記会議参加者の端末からの会議用通信情報を、前記第1の交換機システム内のミキシング装置にそれぞれ送信する動作を行うことなく、当該第2の交換機システム内のミキシング装置に出力して、該ミキシング装置により1つの会議用通信情報に編集した後、前記第1の交換機システム内のミキシング装置に対して送信することを特徴とする請求項3に記載の電子会議システム。
- 会議を主催する会議主催者の端末を接続する第1の交換機システムと、異なる拠点を跨って前記会議主催者が行う会議に参加する会議参加者が使用する端末を接続する第2の交換機システムとを、ネットワークを介して接続した構成からなる電子会議システムにおけるネットワーク帯域の帯域管理方法であって、前記会議参加者側の前記第2の交換機システムとして同一の交換機システムに、前記会議主催者の会議に参加する複数の前記会議参加者の端末が接続されている場合には、当該第2の交換機システム内に備えたミキシング装置において、複数の前記会議参加者の端末からの会議用通信情報をあらかじめミキシングして1つの会議用通信情報に編集して、前記会議主催者側の前記第1の交換機システム内に備えたミキシング装置に対して送信することを特徴とする帯域管理方法。
- 前記会議参加者側の前記第2の交換機システムとして同一の交換機システム内に、前記会議主催者の会議に参加する複数の前記会議参加者の端末が接続されているか否かを判別するために、前記会議主催者側の前記第1の交換機システム内に、少なくとも、会議に参加しようとする前記会議参加者の端末が接続されている前記第2の交換機システムをユニークに特定するアドレスを参加者リストとしてあらかじめ登録することを特徴とする請求項5に記載の帯域管理方法。
- 前記会議主催者側の前記第1の交換機システムにおいて、前記参加者リストに前記会議参加者側の前記第2の交換機システムを特定するアドレスとして同一のアドレスが登録されたことを検出した場合、前記第1の交換機システムから該当する前記第2の交換機システム側に対して、複数の前記会議参加者の端末からの会議用通信情報をあらかじめミキシングして1つの会議用通信情報に編集して、1つに編集した該会議用通信情報を当該第1の交換機システム側に送信することを要求するというミキシング要求を送信することを特徴とする請求項6に記載の帯域管理方法。
- 前記会議参加者側の前記第2の交換機システムにおいて、前記第1の交換機システムからの前記ミキシング要求を受信した際に、複数の前記会議参加者の端末からの会議用通信情報を、前記第1の交換機システム内のミキシング装置にそれぞれ送信する動作を行うことなく、当該第2の交換機システム内のミキシング装置に出力して、該ミキシング装置により1つの会議用通信情報に編集した後、前記第1の交換機システム内のミキシング装置に対して送信することを特徴とする請求項7に記載の帯域管理方法。
- 請求項5ないし8のいずれかに記載の帯域管理方法を、コンピュータによって実行可能なプログラムとして実施していることを特徴とする帯域管理プログラムが格納された記憶媒体。
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Publication number | Publication date |
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AU2013227926B2 (en) | 2014-08-28 |
CN104247351B (zh) | 2016-03-02 |
EP2822239B1 (en) | 2021-03-24 |
JP5327917B2 (ja) | 2013-10-30 |
JP2013175998A (ja) | 2013-09-05 |
US9049342B2 (en) | 2015-06-02 |
CN104247351A (zh) | 2014-12-24 |
BR112014020463B1 (pt) | 2022-08-02 |
BR112014020463A2 (pt) | 2020-11-03 |
EP2822239A4 (en) | 2015-12-09 |
EP2822239A1 (en) | 2015-01-07 |
US20150002613A1 (en) | 2015-01-01 |
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