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EP1360845A1 - Procede pour fixer le codage d'informations utiles produites selon differentes lois de codage entre au moins deux terminaux d'abonnes - Google Patents

Procede pour fixer le codage d'informations utiles produites selon differentes lois de codage entre au moins deux terminaux d'abonnes

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Withdrawn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)
English (en)
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
Siemens Corp
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/de
Priority claimed from DE2001142012 external-priority patent/DE10142012A1/de
Application filed by Siemens AG, Nokia Siemens Networks GmbH and Co KG, Siemens Corp filed Critical Siemens AG
Publication of EP1360845A1 publication Critical patent/EP1360845A1/fr
Withdrawn legal-status Critical Current

Links

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)
  • Communication Control (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

Lorsque des liaisons à multiplexage temporel (TDM) sont commutées par l'intermédiaire d'un réseau de données servant de réseau de base (ATM ou IP) entre un réseau TDM d'origine et un réseau TDM cible (par ex. VoIP), les transitions entre le réseau TDM et le réseau de données s'effectuent par l'intermédiaire de passerelles-média. Comme dans le cas des liaisons TDM pures, les lois de codage des côtés A et B doivent être identiques. Dans les réseaux TDM, le codage peut être réalisé selon la </= loi A >/= (réseaux PCM30) et selon la </= loi mu >/= (réseau PCM24). Lorsqu'on passe d'un réseau selon la loi A à un réseau selon la loi mu , la loi de codage doit être modifiée. Dans l'environnement </= TDM >/= , la règle de conversion établit que le côté loi mu est converti en loi A au niveau de la transition. Ceci était lié au fait que seul un nombre très faible de réseaux TDM utilisait le codage selon la loi mu . Dans les réseaux de transmission ATM et IP apparaissant actuellement, cette nécessité n'existe plus. Selon l'invention, le transcodage peut s'effectuer dans les deux types de réseau. La solution selon l'invention consiste à toujours effectuer ce transcodage dans le réseau cible. Le résultat de la procédure de négociation de codecs (si elle est utilisée) est alors pris en considération, c'est-à-dire que le transcodage s'effectue uniquement pour les codecs G.711 sélectionnés.
EP02706643A 2001-02-13 2002-01-29 Procede pour fixer le codage d'informations utiles produites selon differentes lois de codage entre au moins deux terminaux d'abonnes Withdrawn EP1360845A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2001106583 DE10106583A1 (de) 2001-02-13 2001-02-13 Verfahren zum Austauschen von nach unterschiedlichen Codierungsgesetzen erzeugten Nutzinformationen zwischen wenigstens 2 Teilnehmerendeinrichtungen
DE10106583 2001-02-13
DE10142012 2001-08-28
DE2001142012 DE10142012A1 (de) 2001-08-28 2001-08-28 Verfahren zur Festlegung der Codierung bei nach unterschiedlichen Codierungsgesetzen erzeugten Nutzinformationen zwischen wenigstens 2 Teilnehmerendeinrichtungen
PCT/DE2002/000310 WO2002065787A1 (fr) 2001-02-13 2002-01-29 Procede pour fixer le codage d'informations utiles produites selon differentes lois de codage entre au moins deux terminaux d'abonnes

Publications (1)

Publication Number Publication Date
EP1360845A1 true EP1360845A1 (fr) 2003-11-12

Family

ID=26008483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02706643A Withdrawn EP1360845A1 (fr) 2001-02-13 2002-01-29 Procede pour fixer le codage d'informations utiles produites selon differentes lois de codage entre au moins deux terminaux d'abonnes

Country Status (6)

Country Link
US (1) US20040042409A1 (fr)
EP (1) EP1360845A1 (fr)
JP (1) JP2004518388A (fr)
CN (1) CN1265606C (fr)
BR (1) BR0204042A (fr)
WO (1) WO2002065787A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050008030A1 (en) * 2001-11-27 2005-01-13 Klaus Hoffmann Procedure for exchanging useful information generated according to different coding laws between at least 2 pieces of user terminal equipment
DE10163478C2 (de) * 2001-12-21 2003-12-18 Siemens Ag Verfahren und Anordnung zur Codec-Verhandlung
WO2004084518A1 (fr) 2003-03-21 2004-09-30 Siemens Aktiengesellschaft Procede et dispositif de mise a disposition et d'utilisation efficace de ressources pour produire et sortir des informations dans des reseaux orientes paquets
US7472057B2 (en) * 2003-10-17 2008-12-30 Broadcom Corporation Detector for use in voice communications systems
US20070121514A1 (en) * 2004-02-06 2007-05-31 Peter Goldstein Method for negotiating bearer properties in ip networks
DE602004000759T2 (de) * 2004-02-10 2006-09-14 Alcatel Verfahren zur Bereitstellung von verbesserter Audioqualität zu einer Kommunikationssitzung und entsprechendes Endgerät und maschinenlesbares Speichermedium
CN100399773C (zh) * 2005-04-29 2008-07-02 华为技术有限公司 实现ip域跨域互通的方法
CN100359834C (zh) * 2005-07-25 2008-01-02 深圳市好易通科技有限公司 无线数字信令的编码及解码方法
CN101360333B (zh) * 2007-08-01 2012-01-11 中兴通讯股份有限公司 呼叫连接建立方法
GB201902803D0 (en) * 2019-03-01 2019-04-17 Direct Healthcare Group Ltd Air holding cell for a mattress

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5723356A (en) * 1980-07-02 1982-02-06 Hitachi Ltd Sound signal converter
US6144727A (en) * 1997-08-29 2000-11-07 Anip, Inc. Method and system for global telecommunications network management and display of market-price information
WO2000007353A1 (fr) * 1998-07-28 2000-02-10 Conexant Systems, Inc. Procede et dispositif de detection et de determination des caracteristiques d'un canal numerique dans un systeme de communication de donnees
CN1361994B (zh) * 1999-05-17 2010-06-23 艾利森电话股份有限公司 用于电信网络中的能力协商的系统、设备和方法
US6252952B1 (en) * 1999-12-30 2001-06-26 At&T Corp Personal user network (closed user network) PUN/CUN

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02065787A1 *

Also Published As

Publication number Publication date
BR0204042A (pt) 2003-05-27
CN1265606C (zh) 2006-07-19
WO2002065787A1 (fr) 2002-08-22
CN1466855A (zh) 2004-01-07
US20040042409A1 (en) 2004-03-04
JP2004518388A (ja) 2004-06-17

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