EP1360845A1 - Method for defining the coding for useful information generated according to different coding laws between at least two subscriber terminals - Google Patents

Method for defining the coding for useful information generated according to different coding laws between at least two subscriber terminals

Info

Publication number
EP1360845A1
EP1360845A1 EP02706643A EP02706643A EP1360845A1 EP 1360845 A1 EP1360845 A1 EP 1360845A1 EP 02706643 A EP02706643 A EP 02706643A EP 02706643 A EP02706643 A EP 02706643A EP 1360845 A1 EP1360845 A1 EP 1360845A1
Authority
EP
European Patent Office
Prior art keywords
law
coding
network
useful information
protocol
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.)
Withdrawn
Application number
EP02706643A
Other languages
German (de)
French (fr)
Inventor
Jean-Marie Stupka
Sven Sabrowski
Klaus Hoffmann
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.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Siemens AG
Nokia Siemens Networks GmbH and Co KG
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
Priority claimed from DE2001106583 external-priority patent/DE10106583A1/en
Priority claimed from DE2001142012 external-priority patent/DE10142012A1/en
Application filed by Siemens AG, Nokia Siemens Networks GmbH and Co KG filed Critical Siemens AG
Publication of EP1360845A1 publication Critical patent/EP1360845A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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 according to the preamble of claim 1.
  • More recent communication architectures provide for the separation of switching networks into connection service-related units (call feature server) and the transport of user information (bearer control).
  • the transmission of the user information can be done using different high-bit-rate transport technologies such as ATM, IP or Frame Relay can be made.
  • the telecommunication services currently carried out in narrowband networks can also be implemented in broadband networks.
  • the participants are connected either directly (e.g. via a DSSl protocol) or via switching centers designed as a Call Feature Server (CFS) (e.g. via the ISUP protocol).
  • CFS Call Feature Server
  • the user information is converted into the transport technology used via media gateways (MG).
  • the media gateways are controlled by respectively assigned media gateway controllers, which can be designed as call feature servers.
  • the call feature servers use standardized to control the media gateways
  • BICC Breast Independent Call Control
  • ITU-T bearer technology for IP bearer RTP. This protocol is used to deal with resource problems in the network that are solved with the aid of data compression. An optional CODEC negotiation procedure is currently planned for this purpose.
  • the user information previously transmitted between 2 PSTN networks is routed via an ATM or IP network.
  • a separation between signaling information and useful information is carried out for the transmission through the ATM or IP network.
  • the problem now is that the Q.1902.x BICC CS2 ITU-T standard does not take the problem into account when the participant of an A-law country wishes to establish a connection to a participant located in a ⁇ -law country.
  • the information exchanged between the two participants is generated according to different coding laws, there is a risk of falsification of the useful information.
  • This problem is particularly relevant for cross-border telephone and telephone and data traffic (e.g. Europe (A-Law) - USA ( ⁇ -Law)).
  • the object of the invention is to show a way in which useful information, which is generated according to different coding laws, can be exchanged in a packet-oriented manner.
  • the invention is achieved on the basis of the features specified in the preamble of claim 1 by the characterizing features.
  • the advantage of the invention is that the transcoding can take place in both types of network.
  • the transcoding should always be carried out in the target network. Efficient coding / decoding is achieved by introducing a new indicator and additional logic in the Q.765.5 BAT protocol, with which the source network tells the target network which coding (A-Law or ⁇ -Law) taking into account the existing codec negotiation procedure to be used. If Codec G.711 is selected for the codec negotiation, the target network then carries out the transcoding according to the information in the new indicator according to A-Law or ⁇ -Law.
  • a network configuration is shown on which the method according to the invention is executed.
  • Two PSTN networks are shown here by way of example, in each of which a plurality of subscribers are arranged in a known manner. These are brought up to local exchanges LE, which in turn are connected to transit exchanges TX.
  • the signaling information is fed directly from the transit exchange TX (ISUP protocol) to a Media Gateway Controller CFS.
  • the useful information is fed to a (arranged on the input side) media gateway MG A, which acts as an interface between the TDM network and an ATM or IP transmission network.
  • the user information is transmitted in a packet-oriented manner via the ATM or IP transmission network.
  • the media gateway MG A is controlled by the media gateway controller CFS A, which is designed as a call feature server.
  • the useful information is routed from the media gateway MG A to a further media gateway MG B (arranged on the output side) via the ATM or IP transmission network. There, the user information is again converted into a TDM data stream under the control of the call feature server CFS B assigned to the media gateway MG B arranged on the output side and is supplied to the subscriber in question.
  • the data transmitted between a call feature server and the respective assigned media gateway is supported by a standardized protocol.
  • This can be, for example, the MGCP or the H.248 protocol.
  • the Q.765.5 BAT protocol is provided as a further standardized protocol between the two CFS media gateway controllers.
  • the A side informs the B side (CFS B) by means of an A / ⁇ -law indicator which coding (A-law or ⁇ -law) is to be used when using a G.711 codec.
  • the indicator is transferred to the B side in the BICC protocol and evaluated there if the optional CODEC negotiation procedure is not used. If the optional CODEC negotiation procedure is used, the indicator is only evaluated if the G.711 codec (A / ⁇ -Law) was selected simultaneously with the CODEC negotiation procedure of the Q.765.5 BAT protocol. If other codecs (such as G.723) are selected by the CODEC negotiation procedure, the indicator has no meaning.
  • the B-side shows A-Law; In this case, if the B side is in a ⁇ -Law network, the B side must convert from A-Law to ⁇ -Law. If the A-side is in a ⁇ -Law network, the B-side shows ⁇ -Law. If the B side is in an A-Law network, the B side must convert from ⁇ -Law to A-Law. If the networks on the A and B sides use the same coding, no transcoding is carried out.
  • the media gateways each have an immediate interface to the TDM side.
  • the coding on the TDM side of the media gateway is thus known. It is optionally made known to the media gateway by the assigned call feature server MGC.
  • CFS B call feature servers that act as media gateway controllers
  • the two media gateways MG A, MG B can then be set in a corresponding manner using the MGCP (or H.248) protocol.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Communication Control (AREA)

Abstract

When TDM links are switched from the original TDM network to the destination (e.g. VoIP) via a data network acting as a backbone (ATM or IP), the transitions between theTDM network and the data network are made via media gateways. As for pure TDM-links, the coding laws of sides A and B have to be identical. The coding in TDM is defined according to A-Law (PCM30 networks) and mu -Law (PCM24-networks). The coding law must be modified in the transition from an A-Law to an mu -Law network. In the TDM world, the conversion rule is such that in said transition, the mu -Law side converts to A-Law. This was caused by the fact that only a very small number of TDM networks use the mu -Law coding. In the currently arising ATM and IP transfer networks this necessity no longer exists. The invention determines that transcoding can occur in both types of networks. The inventive solution is always to carry out said transcoding in the destination network, taking into account the result of the codec negotiation procedure (if used), i.e. transcoding occurs only for selected G.711 codecs.

Description

Beschreibungdescription
Verfahren zur Festlegung der Codierung bei nach unterschiedlichen Codierungsgesetzen erzeugten NutzInformationen zwischen wenigstens 2 TeilnehmerendeinrichtungenMethod for determining the coding in the case of useful information generated according to different coding laws between at least 2 subscriber terminals
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff von Patentanspruch 1.The invention relates to a method according to the preamble of claim 1.
Neuere Kommunikationsarchitekturen sehen die Trennung vermittlungstechnischer Netzwerke in verbindungsdienstbezogene Einheiten (Call feature Server) und den Transport der Nutzinformationen (Bearer Control) vor. Die Übertragung der Nutzinformationen kann dabei über unterschiedliche hochbitratige Transporttechnologien wie z.B. ATM, IP oder Frame Relay vorgenommen werden.More recent communication architectures provide for the separation of switching networks into connection service-related units (call feature server) and the transport of user information (bearer control). The transmission of the user information can be done using different high-bit-rate transport technologies such as ATM, IP or Frame Relay can be made.
Mit einer derartigen Trennung sind die gegenwärtig in Schmalbandnetzen geführten Telekommunikationsdienste auch in Breit- bandnetzen zu realisieren. Dabei werden die Teilnehmer entweder direkt (z.B. über ein DSSl-Protokoll) oder über als Call Feature Server (CFS) ausgebildete Vermittlungsstellen (z.B. über das ISUP-Protokoll) angeschlossen. Die Nutzinformationen werden über Media Gateways (MG) in die jeweils benutzte Transporttechnologie umgewandelt.With such a separation, the telecommunication services currently carried out in narrowband networks can also be implemented in broadband networks. The participants are connected either directly (e.g. via a DSSl protocol) or via switching centers designed as a Call Feature Server (CFS) (e.g. via the ISUP protocol). The user information is converted into the transport technology used via media gateways (MG).
Die Steuerung der Media Gateways werden von jeweils zugeordneten Media Gateway Controllern durchgeführt, die als Call Feature Server ausgebildet sein können. Zur Steuerung der Media Gateways verwenden die Call Feature Server normierteThe media gateways are controlled by respectively assigned media gateway controllers, which can be designed as call feature servers. The call feature servers use standardized to control the media gateways
Protokolle, wie z. B. das MGCP Protokoll oder das H.248 Protokoll . Zur Kommunikation untereinander verwenden die Call Feature Server ein standardisiertes BICC (Bearer Independent Call Control) Protokoll, das die Weiterbildung eines ISUP Protokolls darstellt. In dem BICC Protokoll wird das Q.765.5 BAT (bearer applica- tion transport) ITU-T Standard Protokoll verwendet, welches auch für IP bearer RTP als Bearer Technologie beschreibt. Mit Hilfe dieses Protokolles werden Ressourcenprobleme im Netz behandelt, die mit Hilfe von Datenkomprimierung gelöst werden. Hierzu ist derzeit eine optionale CODEC Negotiation Pro- cedure vorgesehen.Protocols such as B. the MGCP protocol or the H.248 protocol. The Call Feature Servers use a standardized BICC (Bearer Independent Call Control) protocol to communicate with each other, which represents the further development of an ISUP protocol. The Q.765.5 BAT (bearer application transport) ITU-T standard protocol is used in the BICC protocol, which also describes bearer technology for IP bearer RTP. This protocol is used to deal with resource problems in the network that are solved with the aid of data compression. An optional CODEC negotiation procedure is currently planned for this purpose.
Eine Anleitung, wie dieses Protokoll zu benutzen ist, gibt ein weiteres BICC Protokoll, das Q.1902.x BICC CS2 Protokoll (bearer independent call control capability set 2, mit einem eigenen Service indicator beim MTP (message transfer part) ) , das als ITU-T Standard in Bearbeitung ist.Instructions on how to use this protocol are provided by another BICC protocol, the Q.1902.x BICC CS2 protocol (bearer independent call control capability set 2, with its own service indicator for the MTP (message transfer part)), which as ITU-T standard is being processed.
Mit Hilfe dieses Protokolls werden z. B. die zwischen 2 PSTN Netzen bislang übertragenen NutzInformationen über ein ATM bzw. IP Netz geführt. Hierbei wird für die Übertragung durch das ATM bzw. IP Netz eine Trennung zwischen Signalisierungs- Information und NutzInformation vollzogen. Problematisch ist nun der Umstand, daß der Q.1902.x BICC CS2 ITU-T Standard nicht das Problem berücksichtigt, wenn der Teilnehmer eines A-Law Landes eine Verbindung zu einem in einem μ-Law Land angeordneten Teilnehmer aufzubauen wünscht. Da in diesem Fall die zwischen beiden Teilnehmern ausgetauschten Informationen nach unterschiedlichen Codierungsgesetzen erzeugt werden, besteht die Gefahr einer Verfälschung der Nutzinformationen. Insbesondere bei grenzüberschreitendem Telefon - und Telefon- und Datenverkehr (z. B. Europa (A-Law) - USA (μ-Law)) kommt diese Problematik zum Tragen. Bei den bislang verwendeten analogen Verbindungen besteht dieses Problem nicht, da in den bisherigen TDM Netzen durch die ITU-T Recommendation G.711 festgelegt war, dass die TransCodierung von μ-Law nach A-Law in den μ-Law-Netzen durchzuführen ist. Der Erfindung liegt die Aufgabe zugrunde, einen Weg aufzuzeigen, wie Nutzinformationen, die nach unterschiedlichen Codierungsgesetzen erzeugt werden, paketorientiert ausgetauscht werden können.With the help of this protocol z. For example, the user information previously transmitted between 2 PSTN networks is routed via an ATM or IP network. A separation between signaling information and useful information is carried out for the transmission through the ATM or IP network. The problem now is that the Q.1902.x BICC CS2 ITU-T standard does not take the problem into account when the participant of an A-law country wishes to establish a connection to a participant located in a μ-law country. In this case, since the information exchanged between the two participants is generated according to different coding laws, there is a risk of falsification of the useful information. This problem is particularly relevant for cross-border telephone and telephone and data traffic (e.g. Europe (A-Law) - USA (μ-Law)). This problem does not exist with the analog connections used up to now, since in the previous TDM networks it was stipulated by the ITU-T Recommendation G.711 that the transcoding from μ-Law to A-Law had to be carried out in the μ-Law networks. The object of the invention is to show a way in which useful information, which is generated according to different coding laws, can be exchanged in a packet-oriented manner.
Die Erfindung wird ausgehend von dem im Oberbegriff von Patentanspruch 1 angegebenen Merkmalen durch die kennzeichnenden Merkmale gelöst.The invention is achieved on the basis of the features specified in the preamble of claim 1 by the characterizing features.
Vorteilhaft an der Erfindung ist, dass die Transcodierung in beiden Netztypen erfolgen kann. Hierbei soll die Transcodierung immer im Zielnetz durchgeführt werden. Eine effiziente Codierung/ Decodierung wird erreicht, indem im Q.765.5 BAT Protokoll ein neuer Indikator und eine zusätzliche Logik eingeführt wird, mit dem das Ursprungsnetz dem Zielnetz mitteilt, welche Codierung (A-Law oder μ-Law) unter Berücksichtigung des bei der eventuell benutzten bestehenden Codec Negotiation Procedure ausgehandelten Codecs zu verwenden ist. Wird bei der Codec Negotiation der Codec G.711 ausgewählt, führt das Zielnetz dann die TransCodierung entsprechend der Angabe im neuen Indikator nach A-Law oder μ- Law durch.The advantage of the invention is that the transcoding can take place in both types of network. The transcoding should always be carried out in the target network. Efficient coding / decoding is achieved by introducing a new indicator and additional logic in the Q.765.5 BAT protocol, with which the source network tells the target network which coding (A-Law or μ-Law) taking into account the existing codec negotiation procedure to be used. If Codec G.711 is selected for the codec negotiation, the target network then carries out the transcoding according to the information in the new indicator according to A-Law or μ-Law.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unter- ansprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.
Die Erfindung wird im folgenden anhand eines figürlich dargestellten Ausführungsbeispieles näher erläutert.The invention is explained in more detail below with reference to an exemplary embodiment shown in the figures.
Demgemäß ist eine Netzkonfiguration aufgezeigt, auf der das erfindungsgemäße Verfahren zum Ablauf gelangt. Hierbei sind beispielhaft 2 PSTN Netze aufgezeigt, in denen jeweils eine Mehrzahl von Teilnehmern in bekannter Weise angeordnet sind. Diese sind an Ortsvermittlungsstellen LE herangeführt, die ihrerseits mit Transit-Vermittlungsstellen TX verbunden sind. In den Transit-Vermittlungsstellen TX wird nun die Trennung zwischen Signalisierungsinformationen und NutzInformationen durchgeführt. Die Signalisierungsinformationen werden von der Transit-Vermittlungsstelle TX unmittelbar (ISUP Protokoll) einem Media Gateway Controller CFS zugeführt. Die Nutzinformationen werden einem (eingangsseitig angeordneten) Media Gateway MG A zugeführt, das als Schnittstelle zwischen dem TDM Netz und einem ATM bzw. IP Übertragungsnetz fungiert. Die Nutzinformationen werden über das ATM bzw. IP Übertragungs- netz paketorientiert übertragen. Das Media Gateway MG A wird von dem Media Gateway Controller CFS A gesteuert, der als Call Feature Server ausgebildet ist.Accordingly, a network configuration is shown on which the method according to the invention is executed. Two PSTN networks are shown here by way of example, in each of which a plurality of subscribers are arranged in a known manner. These are brought up to local exchanges LE, which in turn are connected to transit exchanges TX. In the transit exchanges TX, the separation between signaling information and useful information is now carried out. The signaling information is fed directly from the transit exchange TX (ISUP protocol) to a Media Gateway Controller CFS. The useful information is fed to a (arranged on the input side) media gateway MG A, which acts as an interface between the TDM network and an ATM or IP transmission network. The user information is transmitted in a packet-oriented manner via the ATM or IP transmission network. The media gateway MG A is controlled by the media gateway controller CFS A, which is designed as a call feature server.
Die NutzInformationen werden vom Media Gateway MG A zu einem weiteren (ausgangsseitig angeordneten) Media Gateway MG B über das ATM bzw. IP Übertragungsnetz geroutet. Dort werden die Nutzinformationen wieder unter Steuerung des dem ausgangsseitig angeordneten Media Gateways MG B zugeordneten Call Feature Server CFS B in einen TDM Datenstrom umgewandelt und dem in Frage kommenden Teilnehmer zugeführt.The useful information is routed from the media gateway MG A to a further media gateway MG B (arranged on the output side) via the ATM or IP transmission network. There, the user information is again converted into a TDM data stream under the control of the call feature server CFS B assigned to the media gateway MG B arranged on the output side and is supplied to the subscriber in question.
Die zwischen einem Call Feature Server und dem jeweils zugeordneten Media Gateway übertragenen Daten werden von einem standardisierten Protokoll unterstützt. Dieses kann bei- spielsweise das MGCP oder das H.248 Protokoll sein. Zwischen den beiden Media Gateway Controllern CFS ist als weiteres standardisiertes Protokoll das Q.765.5 BAT Protokoll vorgesehen.The data transmitted between a call feature server and the respective assigned media gateway is supported by a standardized protocol. This can be, for example, the MGCP or the H.248 protocol. The Q.765.5 BAT protocol is provided as a further standardized protocol between the two CFS media gateway controllers.
Erfindungsgemäß teilt die A-Seite (CFS A) der B-Seite (CFS B) mittels eines A/ μ-Law Indikators mit, welche Codierung (A- Law oder μ-Law) bei Verwendung eines G.711 Codecs zu verwenden ist. Der Indikator wird im BICC Protokoll der B- Seite übergeben und dort ausgewertet, falls die optionale CODEC Negotiation Prozedure nicht zur Anwendung kommt. Wenn die optionale CODEC Negotiation Prozedure zur Anwendung kommt, wird der Indikator nur dann ausgewertet, wenn gleichzeitig mit der CODEC Negotiation Procedure des Q.765.5 BAT Protokolls der G.711 Codec (A/ μ-Law) ausgewählt wurde. Falls andere Codecs (wie z.B. G.723) durch die CODEC Negotiation Procedure ausgewählt werden, hat der Indikator dann keine Bedeutung.According to the invention, the A side (CFS A) informs the B side (CFS B) by means of an A / μ-law indicator which coding (A-law or μ-law) is to be used when using a G.711 codec. The indicator is transferred to the B side in the BICC protocol and evaluated there if the optional CODEC negotiation procedure is not used. If the optional CODEC negotiation procedure is used, the indicator is only evaluated if the G.711 codec (A / μ-Law) was selected simultaneously with the CODEC negotiation procedure of the Q.765.5 BAT protocol. If other codecs (such as G.723) are selected by the CODEC negotiation procedure, the indicator has no meaning.
Liegt die A-Seite in einem A-Law Netz, so zeigt sie der B- Seite A-Law an; liegt in diesem Falle die B-Seite in einem μ- Law Netz, so muss die B-Seite von A-Law auf μ-Law konvertieren. Liegt die A-Seite in einem μ-Law Netz, so zeigt sie der B-Seite μ-Law an. Liegt die B-Seite in einem A-Law Netz, so muss die B-Seite von μ-Law auf A-Law konvertieren. Verwenden die Netze der A- und der B-Seite dieselbe Codierung, so wird keine TransCodierung durchgeführt.If the A-side is in an A-Law network, the B-side shows A-Law; In this case, if the B side is in a μ-Law network, the B side must convert from A-Law to μ-Law. If the A-side is in a μ-Law network, the B-side shows μ-Law. If the B side is in an A-Law network, the B side must convert from μ-Law to A-Law. If the networks on the A and B sides use the same coding, no transcoding is carried out.
Dies ist ohne weiteres möglich, da die Media Gateways jeweils eine unmittelbare Schnittstelle zur TDM Seite haben. Damit ist die Kodierung auf der TDM Seite des Media Gateways bekannt. Wahlweise wird sie dem Media Gateway vom zugeordneten Call Feature Server MGC bekannt gemacht.This is easily possible since the media gateways each have an immediate interface to the TDM side. The coding on the TDM side of the media gateway is thus known. It is optionally made known to the media gateway by the assigned call feature server MGC.
Mit den für die als Media Gateway Controller fungierenden Call Feature Servern CFS A, CFS B zur Verfügung stehendenWith the CFS A, CFS B call feature servers that act as media gateway controllers
Informationen können dann die beiden Media Gateways MG A, MG B über das MGCP (oder H.248) Protokoll in entsprechender Weise eingestellt werden. The two media gateways MG A, MG B can then be set in a corresponding manner using the MGCP (or H.248) protocol.

Claims

Patentansprüche claims
1. Verfahren zur Festlegung der Codierung bei nach unterschiedlichen Codierungsgesetzen erzeugten Nutzinformationen zwischen wenigstens 2 Teilnehmerendeinrichtungen, womit nach Maßgabe des ersten Codierungsgesetzes (A-Law) eine A-Seite und nach Maßgabe des zweiten Codierungsgesetzes (μ-Law) eine B-Seite definiert ist, wobei die Nutzinformationen über eine Mehrzahl von Übertragungseinrichtungen (MG A, MG B) geführt werden, die die Funktion einer Schnittstelle zwischen einem ersten (TDM) und zweiten (ATM, IP) Übertragungsnetz aufweisen, und die von jeweils zugeordneten Steuereinrichtungen (CSF A, CSF B) gesteuert werden, die den Nutzinformationen zugeordnete Signalisierungsinformationen bearbeiten, die sie über ein Signalisierungsprotokoll austauschen, dadurch gekennzeich et, dass ein für das erste Codierungsgesetz der A-Seite repräsentativer Indikator vorgesehen wird, der der B-Seite. übergeben wird, und mittels dem nach Maßgabe der auf der B-Seite erfolgten Auswertung die eintreffenden Nutzinformationen in das Codierungsgesetz der B-Seite umgewandelt werden.1. A method for determining the coding in the case of useful information generated according to different coding laws between at least 2 subscriber terminals, which defines an A-side in accordance with the first coding law (A-Law) and a B-side in accordance with the second coding law (μ-Law) , the useful information being conducted via a plurality of transmission devices (MG A, MG B) which function as an interface between a first (TDM) and second (ATM, IP) transmission network, and the respectively assigned control devices (CSF A, CSF B) are controlled, which process the signaling information associated with the useful information and which they exchange via a signaling protocol, characterized in that an indicator representative of the first coding law of the A side is provided, that of the B side. is transferred, and by means of which the incoming useful information is converted into the coding law of the B side in accordance with the evaluation carried out on the B side.
2. Verfahren nach Anspruch 1 , dadurch geke nzeichnet, dass der Indikator von der B-Seite lediglich dann ausgwertet wird, falls die optionale CODEC Negotiation Prozedure nicht zur Anwendung kommt, oder falls sie zur Anwendung kommt, wenn gleichzeitig mit der CODEC Negotiation Procedure der G.711 Codec (A/ μ-Law) ausgewählt wurde.2. The method according to claim 1, characterized in that the indicator is only evaluated from the B side if the optional CODEC negotiation procedure is not used, or if it is used if the CODEC negotiation procedure is carried out at the same time G.711 Codec (A / μ-Law) was selected.
3. Verfahren nach Anspruch 1, 2 dadurch gekennzeichnet, dass eine Umwandlung in das Codierungsgesetz der empfangenden Teilnehmerendeinrichtung lediglich dann erfolgt, wenn A-Seite und B-Seite Nutzinformationen nach unterschiedlichen Codier- ungsgesetzen (A-Law, μ-Law) erzeugen. 3. The method according to claim 1, 2 characterized in that a conversion into the coding law of the receiving subscriber terminal takes place only when the A-side and B-side generate useful information according to different coding laws (A-Law, μ-Law).
4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass das erste Codierungsgesetz das A-Law Codierungsgesetz und/ oder das zweite Codierungsgesetz das μ-Law Codierungs- gesetz ist, oder das erste Codierungsgesetz das μ-Law Codierungsgesetz und/ oder das zweite Codierungsgesetz das A-Law Codierungsgesetz ist.4. The method according to claim 1 to 3, characterized in that the first coding law is the A-Law coding law and / or the second coding law is the μ-Law coding law, or the first coding law is the μ-Law coding law and / or the second Coding Act is the A-Law Coding Act.
5. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, dass falls die A-Seite in einem A-Law Netz und die B-Seite in einem μ-law Netz liegt, der B-Seite lediglich A-Law codierte Nutzinformationen angeboten werden, woraufhin die B-Seite von A-Law auf μ-Law konvertiert.5. The method according to claim 1 to 4, characterized in that if the A-side is in an A-law network and the B-side is in a μ-law network, the B-side is only offered A-law coded useful information, whereupon the B side converts from A-Law to μ-Law.
6. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, dass falls die A-Seite in einem μ-Law Netz und die B-Seite in einem A-Law Netz liegt, der B-Seite lediglich μ-Law codierte NutzInformationen angeboten werden, woraufhin die B-Seite von μ-Law auf A-Law konvertiert.6. The method according to claims 1 to 4, characterized in that if the A-side is in a μ-law network and the B-side is in an A-law network, the B-side is only offered μ-law coded useful information. whereupon the B side converts from μ-Law to A-Law.
7. Verfahren nach einem der vorstehenden Ansprüche, dadurch geke nzeichnet, dass die Übertragungseinrichtungen als Media Gateway (MG A, MG B) ausgebildet sind.7. The method according to any one of the preceding claims, characterized in that the transmission devices are designed as a media gateway (MG A, MG B).
8. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Steuereinrichtungen (CSF A, CSF B) als Call Feature Server ausgebildet sind.8. The method according to any one of the preceding claims, characterized in that the control devices (CSF A, CSF B) are designed as a call feature server.
9. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Austausch der Nutzinformationen zumindest teilweise paketorientiert erfolgt. 9. The method according to any one of the preceding claims, characterized in that the exchange of useful information is at least partially packet-oriented.
10. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die paketorientierte Übertragung nach einem IP-Proto- koll, einem ATM-Protokoll oder einem Frame Relay Protokoll erfolgt.10. The method according to any one of the preceding claims, characterized in that the packet-oriented transmission takes place according to an IP protocol, an ATM protocol or a frame relay protocol.
11. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Signalisierungsprotokoll ein BICC Protokoll oder ein erweitertes ISUP Protokoll ist. 11. The method according to any one of the preceding claims, characterized in that the signaling protocol is a BICC protocol or an expanded ISUP protocol.
EP02706643A 2001-02-13 2002-01-29 Method for defining the coding for useful information generated according to different coding laws between at least two subscriber terminals Withdrawn EP1360845A1 (en)

Applications Claiming Priority (5)

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DE10106583 2001-02-13
DE2001106583 DE10106583A1 (en) 2001-02-13 2001-02-13 Method for defining coding for useful information generated according to different coding laws and passed between subscriber terminals controls the information via multiple transmission devices with interfaces.
DE2001142012 DE10142012A1 (en) 2001-08-28 2001-08-28 Method for defining coding for useful information generated according to different coding laws and passed between subscriber terminals controls the information via multiple transmission devices with interfaces.
DE10142012 2001-08-28
PCT/DE2002/000310 WO2002065787A1 (en) 2001-02-13 2002-01-29 Method for defining the coding for useful information generated according to different coding laws between at least two subscriber terminals

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