EP2208319A1 - Commande d'appel en mode commutation de circuits par le biais d'un canal utile ip dans le réseau d'accès - Google Patents

Commande d'appel en mode commutation de circuits par le biais d'un canal utile ip dans le réseau d'accès

Info

Publication number
EP2208319A1
EP2208319A1 EP07818946A EP07818946A EP2208319A1 EP 2208319 A1 EP2208319 A1 EP 2208319A1 EP 07818946 A EP07818946 A EP 07818946A EP 07818946 A EP07818946 A EP 07818946A EP 2208319 A1 EP2208319 A1 EP 2208319A1
Authority
EP
European Patent Office
Prior art keywords
network
signaling
msc
call
pseudo
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP07818946A
Other languages
German (de)
English (en)
Inventor
Andreas Hochscherff
Dieter Jacobsohn
Karl-Heinz Nenner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Telekom AG
Original Assignee
T Mobile International AG
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
Application filed by T Mobile International AG filed Critical T Mobile International AG
Publication of EP2208319A1 publication Critical patent/EP2208319A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1033—Signalling gateways
    • H04L65/104—Signalling gateways in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0025—Provisions for signalling

Definitions

  • the invention relates to a method for the realization of telephony services in packet-switched telecommunications networks according to the preamble of claim 1.
  • Prior art telecommunication networks where the main application is telephone services, such as voice telephony and associated value-added services such as call forwarding, use so-called circuit-switched channels for transmitting payload, such as voice.
  • telephone services such as voice telephony and associated value-added services such as call forwarding
  • circuit-switched channels for transmitting payload, such as voice.
  • SS7 CCITT Signaling System # 7
  • Payload channels of a circuit-switched network have the property that the bandwidth established during connection establishment is always reserved for the duration of the connection on the route between the caller and the called party.
  • the EDSS-1 protocol is used in ISDN networks and in the access network in mobile networks according to the GSM standard DTAP.
  • dedicated transmission channels are available for the signaling, which are managed separately from the user channels, such as for voice.
  • the call control signaling is via the same channels as the transmission of the user data at the application level.
  • the signaling takes place in the simplest case between the terminals involved, ie end-to-end.
  • a communication of the terminals with an intermediate application server to implement additional network control and / or value-added services or the like is possible.
  • a first disadvantage is that the network operator is required to establish a completely new SIP-based protocol world to continue its known telephony services.
  • Another disadvantage is the new and complex implementation of all value-added services based on SIP with the help of special application servers. This applies to services that today are based on integrated logic in the switching nodes, as well as for IN-based services.
  • the network is exposed to attacks from the terminals, since a foreclosure by the separation between UNI and NNI is eliminated.
  • connection quality in a statistical multiplexing which is not part of the present invention.
  • the object of the invention is to further develop the transmission of protocols in such a way that the protocols known from circuit-switching technology are simplified as application protocols to packet-switched networks.
  • the invention is characterized in that in the packet-switched access network, a user channel is constructed at the user level, taking into account the access method of a terminal, the call control is formed by means of a combination of an IP access network with a CS signaling.
  • CS Circuit Switched
  • PS Packet Switched
  • the invention is not limited exclusively to IP networks. Rather, all other known to the prior art PS networks for the realization of telephony services are applicable. From the above-mentioned differences between CS and PS with respect to the non-existent in PS networks separation of traffic channels and signaling channels, the need arises in PS access networks initially build a traffic channel at the network level, so that at all the signaling can be done at the application level.
  • This traffic channel is specific to the accessibility of the terminals to the PS network and is not part of this invention. Examples include:
  • an end-to-end communication facility for applications ("IP connectivity" in the case of IP networks) via the connection network, whereby the condition for call control signaling is given at the application level.
  • New in the sense of the invention is the combination of IP access networks with the CS signaling.
  • the existing CS signaling in the terminals can continue to be used, only the adaptation to the PS transmission channel is required here. This means that the existing CS signaling DTAP must be specified as an IP application.
  • the network endpoint node is essentially maintained with its current call control function.
  • the interworking with existing CS networks is thus given signaling.
  • the traffic channel traffic does not pass through the network endpoint node but through the above-mentioned dial-up node ("gateway"), e.g., the GGSN in GPRS networks.
  • gateway e.g., the GGSN in GPRS networks.
  • the network endpoint node required here is a kind of MSC, but in contrast to already known MSCs, these are:
  • This network endpoint node will be hereinafter referred to as "pseudo-MSC" for better understanding of the invention, as it has only the call control function of a conventional MSCs, but from the point of view of the access network and the terminal (UNI) on the one hand and the interconnection network (NNI) on the other signaling like an MSC represents.
  • the network endpoint node "pseudo-MSC" includes only the call control function and not other functions of an MSC / VLR and, in contrast to the Rel-4 MSC Server, co-operates with a pure IP access network such as GPRS or DSL.
  • the terminals can also use the IP connection used for signaling in the access network for the transmission of user data.
  • IP filters can not be used for the payload, then a corresponding release of the channel must first be initiated by the pseudo MSC.
  • IP networks that support multiple "IP channels" per terminal, such as GPRS with multiple simultaneous PDP contexts, a separate channel may be provided for the payload.
  • This type of control of the user channels in the PS dial-in node by the pseudo-MSC can be done, for example, by policy protection solutions standardized in 3GPP in which the gateway is instructed to allow an existing channel for the payload transmission or for the payload channel Provide IP channel of certain quality for the user data packets described by means of a filter.
  • connection network In the connection network, however, the possibility of communication between the two gateways is given due to the technical characteristics of an IP connection network without further technical measures.
  • Figure 1 is a schematic diagram of a call control according to the invention in packet-switched networks
  • FIG. 1 shows a solution according to the invention for implementing telephone services in a packet-switched network.
  • An access network 2 extends, for example, from the GPRS network to the GGSN in future mobile networks or a DSL-based access network 2 in the fixed network.
  • the network endpoint node for the call signaling - the pseudo-MSC 5 - is not located within the access network 2, as is customary in CS mobile networks, but from the point of view of the access network 2 in an external network.
  • the signaling of the call setup is carried out at the initiative of the mobile terminal 1 with the known DTAP messages specifying the phone number of the called party. As can be seen from the diagram, this signaling takes place via the IP traffic channel provided by the access network 2 up to the - from the point of view of the access network 2 - external network endpoint node pseudo-MSC 5. The further signaling within the connection network (NNI) is closer in the following scenarios described. 1.2 call setup arriving:
  • the signaling to the mobile terminal 1 also takes place with the known DTAP procedures, the caller also having a signaling relationship to the pseudo-MSC 5 via the IP traffic channel provided by the access network 2.
  • a new message can be defined with which the pseudo-MSC 5 requests the terminal 1 during an incoming call to execute an outgoing call signaling to establish the payload connection.
  • This outgoing call setup request is then assigned in pseudo-MSC 5 the present incoming call, and the gateway - are controlled by the pseudo-MSC 5 - the user channels linked accordingly.
  • the central component of the invention is the pseudo-MSC 5, which provides currently known call control and signaling over an IP network.
  • the call is set up by the caller as described above.
  • the finding of the called party is now limited to finding the network address of the called party by the pseudo MSC 5.
  • To resolve the Dialed number to the IP address of the called party are already known solutions available, which will not be described here.
  • a pseudo-MSC 5 is used both in the network of the originator and in the network of the called party.
  • call control by a single pseudo-MSC 5 is also possible in this case, such as the MSC 5 in the caller's network.
  • network operators do not allow this for reasons of - desired - organizational and technical network separation.
  • the use of one pseudo-MSC 5 in both networks makes it possible to generate CDRs both in the caller's network and in the network of the called party.
  • the call setup on the part of the caller now takes place in the manner already described above. There is now finding the destination network (the network of the called party) and routing the call setup signaling using the functions used today in CS networks, based on the number of the called party specified by the caller.
  • the gateway MSC in the destination network must additionally contain the function of the pseudo MSC 5 and the incoming call structure as to the here properly recognize the scenario described and not a "normal" CS
  • the IP traffic channel is now converted to the CS destination network towards a normal CS traffic channel.
  • an incoming call comes from an existing CS network, it first goes to the MSC gateway.
  • the gateway MSC routes the call to the terminating MSC using the functions available in mobile networks.
  • This terminating MSC now has the function of a media gateway for the implementation of the incoming CS user channel on CS and a pseudo-MSCs 5 to handle the DTAP signaling over IP, or can work with such nodes.
  • This implementation can be done using existing SS7 / SIP interworking solutions. Since the user channel is based directly on IP channels both in the SIP-based network and in the non-SIP-based IP network, no further interworking measures are required here.
  • a transcoding function in the network makes sense if the use of different codecs is provided by the end devices involved in the communication.
  • IMS IP multimedia subsystem

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé pour réaliser une commande d'appel dans des réseaux de commutation de paquets, une liaison entre deux partenaires de communication étant établie au moyen d'un multiplexage statique dans un réseau et l'utilisation du réseau pour des services téléphoniques est exécutée au niveau d'une application, qui forme une signalisation entre deux appareils terminaux concernés. Au cours du développement général menant à l'Internet, il apparaît judicieux aux opérateurs de réseaux de télécommunications classiques de mettre en œuvre leurs services téléphoniques par le biais de réseaux de commutation de paquets. L'établissement d'un monde de protocoles entièrement nouveau, basé sur SIP, présente toutefois des inconvénients pour un opérateur s'il souhaite seulement poursuivre les services téléphoniques connus de lui. Par conséquent, il se trouve confronté à l'objectif de perfectionner la transmission de protocoles de manière telle que les protocoles connus des techniques de commutation de circuits puissent être repris de manière simplifiée sur des réseaux de commutation de paquets en tant que protocoles d'application. A cet effet, un canal utile est établi dans le réseau d'accès de commutation par paquets, la commande d'appel étant effectuée sur le canal utile IP au moyen d'une signalisation de commutation de circuits.
EP07818946A 2007-10-12 2007-10-12 Commande d'appel en mode commutation de circuits par le biais d'un canal utile ip dans le réseau d'accès Ceased EP2208319A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/008875 WO2009049640A1 (fr) 2007-10-12 2007-10-12 Commande d'appel en mode commutation de circuits par le biais d'un canal utile ip dans le réseau d'accès

Publications (1)

Publication Number Publication Date
EP2208319A1 true EP2208319A1 (fr) 2010-07-21

Family

ID=39643856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07818946A Ceased EP2208319A1 (fr) 2007-10-12 2007-10-12 Commande d'appel en mode commutation de circuits par le biais d'un canal utile ip dans le réseau d'accès

Country Status (3)

Country Link
US (1) US20100303010A1 (fr)
EP (1) EP2208319A1 (fr)
WO (1) WO2009049640A1 (fr)

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
US20110044248A1 (en) * 2009-08-18 2011-02-24 Qualcomm Incorporated Reliable inter-radio access technology core network tunnel

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US6704287B1 (en) * 1999-02-26 2004-03-09 Nortel Networks Limited Enabling smart logging for webtone networks and services
US6871070B2 (en) * 2001-07-31 2005-03-22 Lucent Technologies Inc. Communication system for providing roaming between an internet protocol multimedia system and a circuit-switched domain
GB2380008A (en) * 2001-09-21 2003-03-26 Orange Personal Comm Serv Ltd Determining rating data for telecommunications service user
EP1556958A4 (fr) * 2002-10-18 2009-03-04 Kineto Wireless Inc Dispositif et procede pour l'extension de la zone de couverture d'un systeme de communications hertziennes agree, au moyen d'un systeme de communications hertziennes non agree
GB0314252D0 (en) * 2003-06-19 2003-07-23 Ericsson Telefon Ab L M Conversational bearer negotiation
EP1803310B1 (fr) * 2004-10-22 2015-12-23 Genband US LLC Appareil et procedes de gestion de mobilite
WO2007002726A1 (fr) * 2005-06-28 2007-01-04 Mavenir Systems Inc Interconnexion de reseaux ip et de reseaux cellulaires
ATE431034T1 (de) * 2005-10-04 2009-05-15 Ericsson Telefon Ab L M Technik zum verbinden von leitungsvermittelten und paketvermittelten domänen
EP2055112B1 (fr) * 2006-08-23 2017-04-19 T-Mobile International AG Réseau de communication avec commande de commutation de circuits et de paquets
US8879539B2 (en) * 2007-04-26 2014-11-04 Telefonaktiebolaget L M Ericsson (Publ) Method of and a system for establishing a call over an IP multi media communications system and a circuit switched communications system
EP2206368A1 (fr) * 2007-10-04 2010-07-14 Telefonaktiebolaget LM Ericsson (PUBL) Transfert inter-système utilisant des porteuses à commutation de circuit pour servir des n uds de support de service radio par paquets généraux
US20090265542A1 (en) * 2008-04-18 2009-10-22 Amit Khetawat Home Node B System Architecture

Non-Patent Citations (2)

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See also references of WO2009049640A1 *

Also Published As

Publication number Publication date
US20100303010A1 (en) 2010-12-02
WO2009049640A1 (fr) 2009-04-23

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