EP1430730A2 - Procede pour determiner le retard de temps de propagation d'une communication avec transmission par l'intermediaire d'un reseau a commutation par paquets - Google Patents

Procede pour determiner le retard de temps de propagation d'une communication avec transmission par l'intermediaire d'un reseau a commutation par paquets

Info

Publication number
EP1430730A2
EP1430730A2 EP02760139A EP02760139A EP1430730A2 EP 1430730 A2 EP1430730 A2 EP 1430730A2 EP 02760139 A EP02760139 A EP 02760139A EP 02760139 A EP02760139 A EP 02760139A EP 1430730 A2 EP1430730 A2 EP 1430730A2
Authority
EP
European Patent Office
Prior art keywords
delay
connection
packet network
packet
message
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Withdrawn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
EP02760139A
Other languages
German (de)
English (en)
Inventor
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
Application filed by Siemens AG, Nokia Siemens Networks GmbH and Co KG filed Critical Siemens AG
Publication of EP1430730A2 publication Critical patent/EP1430730A2/fr
Withdrawn legal-status Critical Current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
    • H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H04L41/5019—Ensuring fulfilment of SLA
    • H04L41/5025—Ensuring fulfilment of SLA by proactively reacting to service quality change, e.g. by reconfiguration after service quality degradation or upgrade
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • 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
    • H04L65/80—Responding to QoS

Definitions

  • the invention relates to a method for determining the delay in the packet network for a packet network section of a connection.
  • PSTN public switched telephone network
  • subscribers of the public telephone network are connected via lines to the switching systems of public switching technology assigned to them or responsible for them.
  • Subscriber connections can be merged via any subscriber line concentrators or subscriber access networks upstream of the switching system - often referred to by their English name Access Networks - the result of which, however, is the line-based connection of the switched subscriber to the switching system.
  • the connection of the subscriber connections is generally implemented with the aid of time division multiplexing technology - often abbreviated to TDM (Time Division Multiplexing) - for example PCM (Pulse Code Modulation) or SDH (Synchronous Digital Hierarchy).
  • ISDN Integrated Services Digital Network
  • GSM Global System for Mobile Communications
  • SS # 7 protocol Signaling System No. 7
  • MTP message transfer parts
  • UP user parts
  • ISUP ISDN User Part
  • the ISUP transmits control information for setting up, clearing down and monitoring circuit-switched connections for the transmission of user information.
  • runtime delay - a parameter PD (Propagation Delay) - hereinafter referred to as runtime delay - is defined, which defines a measure of the runtime of transmitted user data for a connection.
  • LANs Local Area Networks
  • DSL technology Digital Subscriber Line technology
  • the invention has for its object to provide a method for determining the delay in the packet network.
  • the object is achieved by a method according to the preamble of claim 1 by its characterizing features.
  • the broadcast delay in the packet network is determined for the packet network section of the connection, and essentially half of the time period determined for the broadcast delay is taken as the value for the transit time delay of the packet network section (claim 1).
  • the method allows the determination of the delay in the packet network. This parameter can be used, for example, to determine whether echo cancellation is required for a voice connection.
  • the determination of the runtime delay in an embodiment of the method according to the invention takes place in the course of establishing the connection.
  • the connection is established with the help of a connection setup message.
  • the determination of the runtime delay is triggered by the connection setup message (claim 2).
  • the runtime delay is determined during connection establishment. This means that any settings for quality improvement or assurance, which depend on the delay, can be made before the user data is transferred.
  • the value of the runtime delay parameter is increased by the value of the determined runtime delay for the packet network section (claim 3). This can be done by the connection setup message being transmitted to a control device during the connection setup and being transmitted by the control device during the connection setup.
  • the determination of the delay time is initiated.
  • the forwarding of the connection setup message is stopped until the value of the runtime delay is present and has been added to the value of the runtime delay parameter (claim 4).
  • connection setup message is transmitted to a control device as part of the connection setup.
  • the determination of the delay time is triggered by sending a message to a gateway.
  • the broadcast delay for the packet network section is determined by the gateway, and the value for the broadcast delay or for the determined delay is transmitted to the control device (claim 5).
  • Fig.l System for a routed over a packet network connection of PSTN participants with separate transmission of signaling and user data
  • Fig. 2 Processes of the method according to the invention in determining the delay time for the packet network section during connection establishment
  • the method according to the invention is illustrated on the basis of a connection initiated by a PSTN terminal TlnA with a second PSTN terminal TlnB.
  • the connection is in sections via a packet network INT, for example the in- ternet, an intranet or a network based on ATM (asynchronous transfer mode) technology.
  • INT packet network
  • This can be a telephone call, for example.
  • the connection establishment can be traced on the basis of FIG. 1.
  • useful information and control information are kept separately.
  • the user data are transmitted from the terminal TlnA to the local exchange LE and from there to the transit exchange TXA.
  • the transit exchange TXA is connected to a network access device MGA (MG: for media gateway), which is provided for processing TDM user data for transmission over a packet network INT.
  • MGA network access device
  • User data transmitted via the packet network INT in the context of a voice application are processed again at the receiver end by a network access element MGB, in order to then be transmitted via a TDM network first to a transit exchange TXB and finally to a subscriber-oriented terminal exchange LE and the terminal TlnB.
  • Signaling data for establishing a connection are transmitted to the control unit MGCA (MGC for Media Gateway Controller), to which the network access unit MGA is assigned.
  • This control unit can be, for example, a switching system or a so-called gatekeeper.
  • the control unit MGCA communicates with the network access device MGA and the B-side control unit MGCB.
  • the control unit MGCB exchanges messages with the control unit MGCA, the network access unit MGB and the receiver-side PSTN network for connection control.
  • the delay can be obtained using known methods.
  • the running time delay between the network access element MGA and the network access element MGB so that, together with the transit time delays for the other routes, the total transit time delay for the connection can be determined by the subscribers TlnA and TlnB.
  • the establishment of a connection is described, for example, in ITU standard Q.1902.4 in accordance with the BICC CS2 protocol (Bearer independent call control protocol capability set 2).
  • connection establishment message IAM (IAM: Initial Address Message) plays a central role in establishing a connection.
  • the transit exchange TXA sends a connection setup message IAM to the control unit MGCA.
  • the sending of a message CRCX (CRCX: Create Connection) to the network access unit MAG is initiated, thereby signaling the request to establish a connection.
  • CRCX Create Connection
  • the receipt of this message CRCX is acknowledged by the network access unit MGA to the control unit MGCA by means of a reply message.
  • the connection setup message IAM is then transmitted from the control unit MGCA to the control unit MGCB.
  • the control unit MGCB sends a message CMCX to the network access unit MGB upon receipt of the connection establishment message IAM, thereby signaling the desire to establish a connection.
  • the receipt of this message is acknowledged by the network access unit MGB to the control unit MGCB.
  • the setup message IAM is forwarded by the control unit MGB to the transit exchange TXB on the receiver side.
  • further control or response messages for example corresponding transferred according to Q.1902.4.
  • the ISUP protocol is used for the exchange of messages between the transit exchanges TXA and TXB and the control units MGCA and MGCB.
  • a manufacturer-specific extended ISUP protocol or the BICC protocol can be used for the signaling between the two control elements MGCA and MGCB.
  • the MGCP (MGCP: Media Gateway Control Protocol) can be used for the exchange of control information between the control elements MGCA and MGCB and the network access elements MGA and MGB assigned to them.
  • the network setup message IAM contains a parameter for the propagation delay PD (PD: Propagation Delay). This parameter PD specifies the value of the determined runtime delay. If the connection setup message IAM has been transmitted to the control element MGCA, the value of the runtime parameter PD corresponds to the runtime delay determined on the call side for the route in the PSTN network. When the connection setup message IAM is transmitted from the control element MGCA to the control element MGCB, the value of the runtime delay does not change.
  • PD Propagation Delay
  • the control element MGCB determines the transit time delay as a result of the transmission over the packet network.
  • the processes that take place during the establishment of the connection in addition to determining the delay time are shown in FIG. 2 on the right-hand side.
  • the control element MGCB establishes a connection with this network access element MGCB by transmitting the message CRCX to the network access element MGB.
  • the determination of a delay in the packet network PD (INT) by the network access element MGB is requested with a message ENR (ENR: Encapsulated Notification Request) or with a notification request RQNT command.
  • ENR Encapsulated Notification Request
  • the runtime delay PD (INT) via the packet network is transmitted to the control element MGCB and added to the value of the runtime parameter of the network setup message IAM.
  • the transmission of the network setup message IAM to the transit exchange TXB on the receiver side is delayed until the transit time delay is determined via the packet network and the transit time delay parameter PD of the network access message IAM has been increased accordingly.
  • the calculation of the broadcast delay for a packet-oriented network is described, for example, in the standard proposal RFC 1889, section 6.3, of the IAB (Internet Architecture Board), and is outlined below.
  • RTC control protocol packages for sender report messages (SR: sender report) and receiver report messages (RR: receiver report) are defined.
  • SR sender report
  • RR receiver report
  • the parameters timestamp tstamp are defined, which are assigned the value of the send time of the respective send time wclock (sendSR) (wclock: for wallclock) of the packet.
  • the transmitter is equipped with a clock function with time measurement (wallclock time), which records, for example, the (absolute) operating time of the transmitter.
  • the transmitter sends a transmitter report message packet SR with the corresponding time stamp wclock (sendSR).
  • the receiver extracts the associated time stamp wclock (sendSR) from the transmitter report message packet SR and sends a receiver report message packet RR.
  • This receiver report message packet RR contains the time stamp wclock (sendSR) of the transmitter report message packet SR and the time difference Dt (recveSR, sendRR) between the sending of the receiver report message packet RR and the arrival of the transmitter report message packet SR.
  • the broadcast delay rdly is calculated by starting from the time of arrival wclock (recveRR) of the receiver report message packet RR, the time stamp tstamp of the transmitter report message packet SR and the time difference between the arrival of the receiver report packet SR Sender report message packet Dt (recveSR, sendRR) is subtracted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé permettant de déterminer le retard de temps de propagation dans un réseau à commutation par paquets concernant une section d'une communication entre appareils terminaux (TlnA, TlnB) transmise par le réseau à commutation par paquets, la communication étant établie au moins partiellement par l'intermédiaire du réseau à commutation par paquets (INT). Selon ce procédé, on détermine le retard de diffusion (rdly) dans le réseau à commutation par paquets pour la section transmise par le réseau à commutation par paquets et on prend sensiblement la moitié de la durée déterminée pour le retard de diffusion (rdly) comme valeur pour le retard de temps de propagation (PD) de la section transmise par le réseau à commutation par paquets. Ce procédé permet de déterminer le retard de temps de propagation dans le réseau à commutation par paquets. A l'aide de ce paramètre, on peut par exemple déterminer si une compensation d'écho est nécessaire lors d'une communication vocale.
EP02760139A 2001-09-25 2002-08-30 Procede pour determiner le retard de temps de propagation d'une communication avec transmission par l'intermediaire d'un reseau a commutation par paquets Withdrawn EP1430730A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10147164 2001-09-25
DE10147164A DE10147164B4 (de) 2001-09-25 2001-09-25 Verfahren zur Ermittlung der Laufzeitverzögerung einer Verbindung mit Übertragung über ein paketbasiertes Netz
PCT/DE2002/003203 WO2003028319A2 (fr) 2001-09-25 2002-08-30 Procede pour determiner le retard de temps de propagation d'une communication avec transmission par l'intermediaire d'un reseau a commutation par paquets

Publications (1)

Publication Number Publication Date
EP1430730A2 true EP1430730A2 (fr) 2004-06-23

Family

ID=7700175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02760139A Withdrawn EP1430730A2 (fr) 2001-09-25 2002-08-30 Procede pour determiner le retard de temps de propagation d'une communication avec transmission par l'intermediaire d'un reseau a commutation par paquets

Country Status (6)

Country Link
US (1) US20040246907A1 (fr)
EP (1) EP1430730A2 (fr)
CN (1) CN1559150A (fr)
BR (1) BR0212810A (fr)
DE (1) DE10147164B4 (fr)
WO (1) WO2003028319A2 (fr)

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EP1704690A2 (fr) * 2003-07-31 2006-09-27 Siemens Aktiengesellschaft Systeme et procede de convergence des communications commutees par circuit et commutees par paquets
WO2006128495A1 (fr) * 2005-05-31 2006-12-07 Telefonaktiebolaget Lm Ericsson (Publ) Procede et architecture d'interception legale de transmission transparente d'informations d'interception
US8787210B2 (en) 2006-09-15 2014-07-22 Itron, Inc. Firmware download with adaptive lost packet recovery
US7986718B2 (en) * 2006-09-15 2011-07-26 Itron, Inc. Discovery phase in a frequency hopping network
JP2009038444A (ja) * 2007-07-31 2009-02-19 Hitachi Kokusai Electric Inc ネットワークシステム、制御方法及びゲートウェイ装置
US20090262732A1 (en) * 2008-04-16 2009-10-22 Barry Wood Data Communications Network
JP5506362B2 (ja) * 2009-12-15 2014-05-28 キヤノン株式会社 送信装置、送信方法
US8880684B2 (en) * 2010-07-23 2014-11-04 Broadcom Corporation Method and system for measuring individual network round-trip delays in IP gateways
US10049404B2 (en) 2012-12-18 2018-08-14 Trading Technologies International, Inc. Methods and systems to prevent adverse exchange limit effects
CN104622749A (zh) * 2015-01-22 2015-05-20 鲁杨 一种治疗痤疮的洁面膏及其生产方法
US10833799B2 (en) 2018-05-31 2020-11-10 Itron Global Sarl Message correction and dynamic correction adjustment for communication systems

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WO2002091692A1 (fr) * 2001-04-13 2002-11-14 Girard Gregory D Systeme de commutation de bord reparti de reseau multiservice de paquet d'avertissement

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Also Published As

Publication number Publication date
DE10147164A1 (de) 2003-04-24
US20040246907A1 (en) 2004-12-09
WO2003028319A3 (fr) 2003-07-31
BR0212810A (pt) 2004-10-05
CN1559150A (zh) 2004-12-29
DE10147164B4 (de) 2004-05-06
WO2003028319A2 (fr) 2003-04-03

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