WO2001015422A1 - Method and terminal for a communications network for establishing a conference circuit - Google Patents

Method and terminal for a communications network for establishing a conference circuit Download PDF

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Publication number
WO2001015422A1
WO2001015422A1 PCT/DE2000/002706 DE0002706W WO0115422A1 WO 2001015422 A1 WO2001015422 A1 WO 2001015422A1 DE 0002706 W DE0002706 W DE 0002706W WO 0115422 A1 WO0115422 A1 WO 0115422A1
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WO
Grant status
Application
Patent type
Prior art keywords
terminal
point
connection
order message
e2
Prior art date
Application number
PCT/DE2000/002706
Other languages
German (de)
French (fr)
Inventor
Heinrich Hummel
Original Assignee
Siemens Aktiengesellschaft
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.)
Filing date
Publication date

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2381Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/42Systems providing special services or facilities to subscribers
    • H04M3/56Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/60Selective content distribution, e.g. interactive television, VOD [Video On Demand] using Network structure or processes specifically adapted for video distribution between server and client or between remote clients; Control signaling specific to video distribution between clients, server and network components, e.g. to video encoder or decoder; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing using dedicated Communication protocols
    • H04N21/64307ATM
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/14Systems for two-way working
    • H04N7/15Conference systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M2203/00Aspects of automatic or semi-automatic exchanges
    • H04M2203/50Aspects of automatic or semi-automatic exchanges related to audio conference
    • H04M2203/5009Adding a party to an existing conference

Abstract

In order to establish a conference circuit via a communications network, especially an ATM network, a connection setup request message (VA; VZA) containing address information (A2; A4) that identifies a second terminal (E2; E4) is transmitted by a first terminal (E1) to a third terminal (E3) via an existing connection (V1; C1). The third terminal (E3) is then prompted by the connection setup request message (VA; VZA) to establish a directed point-to-multipoint connection (C3) on the first terminal (E1) and the second terminal (E2; E4) which is identified by the address information (A2; A4).

Description

description

Procedures and Endgerat for em communications network for establishing a conference call

The invention relates em method of establishing a conference call between a plurality of e communication network, in particular em ATM network coupled Endgeraten. Moreover, the invention for realizing the e Endgerat ER- fmdungsgemaßen process relates. Under a conference call, this connection is meant a compound for voice, video and / or data transmission between at least three Endgeraten.

In ATM networks, conference calls are at present with

Using so-called conference server set up. To establish a conference call each conference participant builds initially be Endgerat a point-to-point verb dung to a common conference server. From this point-to-multipoint Verbmdung is then built up to the Endgeraten of conference participants and fed with the data received via the point-to-point data streams Verbmdungen. In this way, each conference participant receives the communication data sent from all the other conference participants.

Em method of establishing a conference call, based on a conference server, but it has the disadvantage that the number of concurrent conference circuits and / or the maximum number of conference participants by the number of Ubertra- provided by the conference server is supply ducts restricted.

It is an object of the present invention, em method of establishing a conference call m is to provide a communications network, particularly an ATM network which does not require a connection switching by a conference server. It is also indicate e Endgerat for realizing the erf dungsgemaßen method.

This object is achieved by em method with the features of claim 1 and em Endgerat with the features of patent claim 8.

Em setting up a conference circuit is involved or when erfmdungsgema ¬ SEN process essentially by the conference call controlled may participate Endgerate. Em ¬ agile conference server is therefore unnecessary. This has inter alia the advantage that the number aufbaubarer conferencing or the maximum number of conference participants essentially only by the transmission capacity of the communication network is limited.

By erf dungsgemaße method, any communication network coupled to em Endgerate to an existing connection between two or more Endgeraten carbide blank switch. For em hinzuzuschaltendes Endgerat let thereby define individually to which the Endgerate involved in the existing call sent communication data and from which this Endgerate communications data to be received.

An implementation of a conference call by one or more point-to-multipoint Verbmdungen continues to maintain substantially less transmission capacity in the communications network as eme conference serverless realization by a plurality of point-to-point Verbmdungen. In one implementation, by point-to-point Verbmdungen is of data which are to be transmitted in parallel on multiple target Endgerate to transmit its own copy of data on a dedicated connection to the respective destination for each target Endgerat Endgerat. In a point-to-multipoint Verbmdung contrast Endgerate be simply transported m usually data to be transmitted on common routes of the route to several target. In particular, since conference calls with a variety of participating Endgeraten by a much smaller number of point-to-multipoint verb applications can be implemented as a point-to-point Verbmdungen is at a realization by point-to-multipoint Verbmdungen also em much less effort required in the connection management of the communication network.

Advantageous embodiments and developments of the Erfm- are given m the dependent claims fertil.

From a Zielendgerat as a point-to-multipoint Verbmdung m included a conference circuit second terminal can be additionally arranged also emanating from this point-to-multipoint verb dung. For this purpose, the third and the first terminal identifying address information is transmitted with a call setup order message the second terminal from the first or third Endgerat. The second terminal builds mfol- gedessen automatically a point-to-multipoint Verbmdung to the respective the connection setup message be transmitted in order Endgerat and the identified from the address information on Endgerat. If the established point-to-multipoint Verbmdungen are unidirectional, the second terminal can be involved in this way both sending and receiving Endgerat in the conference.

Further, a point-to-multipoint can be constructed by the first terminal in the course of construction of a conference call automatically connect to the second and third Endgerat and optionally also to one or more further Endgeraten. If the established point-to-multipoint Verbmdungen are unidirectional, can thus be respectively received by any other of these Endgerate the communication data transmitted from the first, second and third Endgerat. It should be noted at this point that the per ¬ weiligen structure of the above point-to-multipoint applications Verbm ¬ no chronological order is fixed.

According to an advantageous embodiment of the invention the connection setup message order is realized by a branch construction Verbmdungs- order message. By receipt of a Verbmdungszweigaufbau-order message em Endgerat is caused to add an additional call leg to an existing point-to-point Verbmdung or point-to-multipoint Verbmdung. The additional link branch is addressed to em or more of the contained the Verbm--making branch construction job message address information identified Endgerate. In this way, usually more elaborate, complete rebuilding of a point-to-multipoint verb can be avoided dung.

According to a further advantageous embodiment of the invention, each Zielendgerat be established a point-to-multipoint verb dung in an order with a Verbmdungsaufbau- message transmitted to the address information can be specified. For em such Verbmdungsaufbau- order message receiving Endgerat therefore unnecessary an additional provision of Zielendgeraten such formations based contained in a connection memory of Endgerates address.

The invention is particularly advantageous let to build a conference call on em ATM network use. In this case, an ATM Adressmformation is transmitted as em or more Endgerate identifying address information. Accordingly, an ATM point-to-multipoint Verbmdung is constructed as a point-to-multipoint Verbmdung. About em ATM network also con- ference can circuits with very high Datenubertragungsbedarf, such as video conferencing, are built due to its high transmission bandwidth. An exemplary embodiment of the invention is explained below with reference to the drawing near.

In this case, each show a schematic representation m

FIG 1 em Endgerat which is connected with two other Endgeraten each case via a point-to-point connection,

2 shows the same Endgerate three point-to-multi-point comparison bmdungen to a conference call is connected,

3 shows the connected to a conference call with a Endgerate be included m the conference call, and fourth Endgerat

4 shows the same four Endgerate connected via four point-to-multipoint Verbmdungen to a conference call.

In FIG 1, three of em ATM network (not shown) reasonable connected Endgerate El, E2 and schematically E3, wherein between the Endgeraten El and E3 a bi-directional ATM point-to-point verb dung VI and between the Endgeraten El and E2 bidirectional ATM point-to-point Verbmdung V2 is. Endgeraten the El, E2 and E3 are m this tire henfolge unique ATM addresses AI, A2 and A3 associated.

of each of the Endgerate El, E2, E3 has a connection control VAS and an associated connection data memory VS, m connection-specific the outgoing Ede from a respective Endgerat connection infor- NEN associated with the particular compound, stored. In the drawing are indicated as connection-specific information only the destination addresses of the respective compounds. In Verbmdungsdatenspeicher VS of Endgerates El of the ATM point-to-point Verbmdung VI is the ATM address A3 and the ATM point-to-point Verbmdung V2 associated with the ATM address A2. Accordingly, in the connection data memory VS of Endgerates E2 of the ATM point-to-point Verbmdung V2 is assigned to the ATM address AI and in the connection data memory VS of Endgerates E3 of the ATM point-to-point Verbmdung VI the ATM address AI.

For the present exemplary embodiment, it is assumed that the ATM point-to-point Verbmdung V2 was set up in existing ATM point-to-point Verbmdung VI to mitemzubeziehen the Endgerat E2 m a structure of a conference call. To establish this conference a connection-order message VA with the ATM addresses Al and A2 is transmitted as information content to Endgerat E3 from Endgerat El through the ATM point-to-point Verbmdung VI. Furthermore, a job message Verbmdungsaufbau VA with the ATM addresses AI and A3 is sent as Informationsmhalt to Endgerat E2 from Endgerat El through the ATM point-to-point Verbmdung V2. Connection-order messages VA are realized in the present embodiment as so-called. NOTIFY messages that are marked as an order to establish a connection and em infor ationselement comprise one or more destination addresses to which the connection is to be established.

The Verbmdungsaufbau order message VA (Al, A2) is received from the Endgerat E3 recognized as Verbmdungsaufbau order message and consequently forwarded to a connection setup control VAS of Endgerates E3. Through the connection control VAS em build an ATM point-to-multipoint Verbmdung to the information provided by ATM addresses AI and A2 identified Endgeraten El and E2 comparable anlaßt is. the Endgerat E2 (Al, A3) is analogous to through the order message Verbmdungsaufbau-VA caused to establish an ATM point-to-multipoint Verbmdung to the ATM by the addresses AI and A3 identified Endgeraten El and E3. The transmission of the ATM address AI m both encryption bmdungsaufbau order messages VA would not be absolutely necessary, since this ATM address AI already the respective connecting data storing VS of Endgerate E2, E3 is present. However, by the redundant transmission of this ATM address AI ver ¬ simplifies the implementation of the method.

Furthermore, the Endgerates El is from a setup control VAS an ATM point-to-multipoint verb dung to the Endgeraten E2 and E3 constructed. After construction of the ATM point-to-multipoint Verbmdungen the previously existing ATM point-to-point Verbmdungen VI and V2 are reduced.

2 shows the connection state caused by the above-mentioned method steps. an ATM point-to-multipoint connection proceeds Cl to Endgeraten E2 and E3 from the terminal El. The ATM point-to-multipoint connection Cl branches thereby to an ATM network node Kl. Accordingly, the ATM addresses A2 and A3 of the ATM point-to-multipoint Verbmdung Cl are assigned in the connection data memory VS of Endgerates El stored. Furthermore proceeds from Endgerat E2 a branching to an ATM network node K2 ATM point-to-multipoint connection C2 to the Endgeraten El and E3. In the connection data memory of the VS Endgerates E2 the ATM-addresses are assigned according to AI and A3 of the ATM point-to-multipoint connection C2. Finally, proceeds from a Endgerat E3 at the ATM node K3 branching ATM point-to-multipoint connection to the C3 Endgeraten El and E2. the E3 Endgerates the ATM addresses dung Al and A2 of the ATM point-to-multipoint verb C3 are accordingly assigned to the connection data memory VS. The assembled ATM point-to-multipoint connections Cl, C2 and C3 are each unidirectional, wherein the data transport - as indicated by the arrow direction - in each of which an ATM point-to-

Multipoint call originating Endgerat issued at the current Zielendgeraten. The present connection state at this time provides a conference call between the Endgeraten El, E2 and E3 represent, at each Endgerat to the sending communication data to all other parallel

Endgerate transmitted and each Endgerat catch emp ¬ according to the communication data sent from all other Endgeraten.

FIG 3 illustrates a procedure for incorporating a further Endgerates E4 with the ATM address A4 m the existing conference call Endgerate of El, E2 and E3. Integrating the Endgerates E4 initially an ATM point-to-point Verbmdung V3 is established between it and the Endgerat El. This can be done at the request of the newly em- zubeziehenden Endgerates E4 and the Endgerates El already included. During the construction of the ATM point-to-point Verbmdung V3 the ATM point-to-point Verbmdung V3 is assigned to the ATM address A4 of Endgerates E4 in the connection data memory VS of Endgerates El. Similarly, the ATM-point is allocated to-point Verbmdung V3 by the connection control VAS the ATM address AI of the Endgerates El in the connection data memory of the VS Endgerates E4. Then, by the Endgerat El through the ATM point-to-point Verbmdung V3 a Verbmdungsaufbau order message VA with the ATM addresses Al, A2, A3 all Endgerate been m the conference call included El, E2, transmitted E3 to Endgerat E4. The information to be ATM addresses A2 and A3 are determined by reading from the connection data memory of the VS Endgerates El. In addition, by Endge- rat El manure over the ATM point-to-multipoint verb Cl a

Verb dung branch build-Aufragsmeldung VZA A4 of m, the conference circuit to be included with the ATM address Endgerates E4, transmitted to all other conference call included m the previous Endgerate E2 E3. Also to ubermit- telnde ATM address A4 is determined by reading from the connection data storage VS the Endgerates El. The encryption bmdungszweigaufbau order message VZA is realized as the connection-order message VA as NOTIFY message with a one or more Adressmformationen containing infor ATI onselement. The Endgerat is E4 by the received call setup order message VA (AI, A2, A3) to cause an ATM point-to-multipoint Verbmdung to, aufzu by the ATM addresses AI A2 and A3 identified Endgeraten El, E2 and E3 - to build.

The Endgerate E2 and E3 are each received Verbmdungszweigaufbau order message VZA (A4) caused to transmit a respective Verbmdungszweig setup message AP with the ATM address A4 of Endgerates E4 as address information to the ATM network node K2 and K3, respectively. Another Verbmdungszweig-up message to the AP ATM address A4 will be sent to the network nodes K from El Endgerat itself. The connection branch-establishment messages AP are present exemplary fuhrungsbeispiel as so. Realized ADD PARTY messages.

Through an ADD PARTY message em is causing them receiving ATM network nodes to an existing ATM Verbmdung an additional connection branch which is directed to an identified through a contained in the ADD PARTY message Adressmforma- tion Endgerat add.

Of the ATM network node Kl, K2 and K3 in accordance with the respective receiving the Verbmdungszweig setup message AP (A4) is in each case em gt on Endgerat E4 leading call leg to the existing ATM point-to-multipoint Verbmdung Cl, C2 and C3 hinzugef. the ATM point-to-point Verbmdung V3 is broken then.

The hinzugefugten connecting branches branch off in the present embodiment from the sake of clearer representation respectively on the same network node Kl, K2 and K3, respectively, at which the respective existing ATM point-to-multipoint Verbmdung branched. However, this is not necessarily the rule. Rather, it is usually advantageous to select the ATM network node at which the hinzuzufugende connecting branch branches so that this call leg is as short as possible or to optimize other ways. The resultant state of connection is finally shown m FIG. 4 The outgoing from the original conference scarf ¬ tung included Endgeraten El, E2 and E3 ATM point-to-multipoint Verbmdungen Cl, C2 and C3 are in each case to a directed to Endgerat E4 call leg erg ä complements. Accordingly, m the connection data storing VS this Endgerate El, E2, E3 to the respective ATM point-to-multipoint Verbmdungen Cl, C2 and C3 also assigned to the ATM address A4. Furthermore, proceeding from the new the conference included Endgerat E4 and branching at the ATM network node K4 ATM point-to-multipoint Verbmdung C4 to all other participating in the conference call Endgeraten El, E2, E3 is built. According to this ATM point-to-multipoint Verbmdung C4 associated with the ATM addresses AI, A2 and A3 in the space A Verbmdungsda- VS of Endgerates E4.

The Verbmdungszustand reached corresponds to a conference call of Endgerate El, E2, E3 and E4, wherein each end gerat spending of all other Endgerate participating in the conference call receives and its own output from all others in the conference call involved Endgeraten can be received.

Starting can be any number of further successive Endgerate include m by application of the inventive method, the conference circuit of this conference call. The above VERSIONS can be transferred to mutatis mutandis.

Furthermore, with the inventive shaped procedures, other Verbmdungszustande can be realized in which not every Endgerat with each other in the conference call involved Endgerat is both sending and receiving, respectively. Thus, by appropriate selection of the m-order messages Verbmdungsaufbau VA or the Verbmdungszweigaufbau order messages VZA contained requested ATM addresses of each terminal of a conference call with respect to each other terminal of the conference circuit as a transmitter and / or receiver to be established.

Claims

claims
1. A method for a communication network for establishing a conference call, in which - from a first terminal (El) is a connection establishment order message (VA; VZA) having a second terminal (E2; E4) identifying address information (A2, A4) via an existing compound (VI Cl) to a third terminal (E3) is received, and - the third terminal (E3) by the call setup order message (VA; VZA) for establishing a to the first terminal (El) and (by the address information A2 ; A4) identified, second terminal (E2; E4) directed point-to-multipoint connection (C3) is caused.
Second A method according to claim 1, characterized in that from the first terminal (El) is a connection establishment order message (VA) having a third terminal (E3) identifying address information (A3) via an existing connection (V2; V3) (to the second terminal E2; E4 ) is transmitted and
- the second terminal (E2; E4) through the establish a connection-order message (VA) identified for establishing a to the first terminal (El) and by the address information (A3), the third terminal (E3) directed point-to-multipoint compound (C2; C4) is caused.
3. The method according to claim 1, characterized in that the third terminal (E3) a call setup order message having a first terminal (El) identifying address information (AI) via the established point-to-multipoint connection (C3) to the second terminal (E2; E4) is transmitted and
- the second terminal (E2; E4) of an identified by the call setup order message for the construction of the one by the address information (AI), the first terminal (Ei, and the third terminal (E3) directed point-to-multipoint connection (C2; C4) is caused.
Method according to one of the preceding claims, characterized in that from the first terminal (El) a to the second (E2; E4) and the third terminal (E3) directed point-to-multipoint connection (Cl) is built up
5. The method according to any one of the preceding claims, characterized in that a this receiving terminal is caused by a connection-order message (VA) by a connecting branch structure-order message (VZA) is realized to an existing point-to-point add an additional connection branch connection or point-to-multipoint connection, the identified at the given through a branch structure in the joint-order message (VZA) address information terminal is directed.
6. The method according to any one of the preceding claims, characterized in that in a connection setup order message (VA) to establish a point-to-multi-point connection of each destination terminal of to be set up point-to-multi-point connection by the connection establishment specified order message contained address information.
7. The method according to any one of the preceding claims, characterized in that the conference call is set up via an ATM network as a communication network, as a terminal address information identifying an ATM address information (AI, A2, A3, A4) is transmitted, and as point to-multipoint
Connecting an ATM point-to-multipoint connection (Cl, C2, C3, C4) is constructed.
8. Endgerat for connection to em communications network and for establishing a conference call, comprising - a receiving means for receiving a transmitted via the communication network connection establishment order message (VA, VZA) with an em second Endgerat (E2; E4) identifying address information (A2, A4) and - a setup control (VAS) (to evaluate a received Verbmdungsaufbau order message VA;
VZA) and a a Verbmdungsaufbau order message (VA for establishing a point-to-multipoint Verbmdung; VZA) sending Endgerat and the through this Verbmdungsaufbau order message (VA; VZA) contained Adreßm- formation (A2, A4) identified , second terminal (E2; E4).
PCT/DE2000/002706 1999-08-19 2000-08-11 Method and terminal for a communications network for establishing a conference circuit WO2001015422A1 (en)

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DE19939388.5 1999-08-19
DE1999139388 DE19939388A1 (en) 1999-08-19 1999-08-19 A method and terminal for a communications network for establishing a conference call

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5600643A (en) * 1993-09-23 1997-02-04 Bell Communications Research, Inc. Broadband intelligent telecommunications network and method providing enhanced capabilities for customer premises equipment
EP0805576A2 (en) * 1996-05-01 1997-11-05 Gpt Limited Multi-party communications
US5854898A (en) * 1995-02-24 1998-12-29 Apple Computer, Inc. System for automatically adding additional data stream to existing media connection between two end points upon exchange of notifying and confirmation messages therebetween

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5600643A (en) * 1993-09-23 1997-02-04 Bell Communications Research, Inc. Broadband intelligent telecommunications network and method providing enhanced capabilities for customer premises equipment
US5854898A (en) * 1995-02-24 1998-12-29 Apple Computer, Inc. System for automatically adding additional data stream to existing media connection between two end points upon exchange of notifying and confirmation messages therebetween
EP0805576A2 (en) * 1996-05-01 1997-11-05 Gpt Limited Multi-party communications

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