EP1438827A1 - Repartition fonctionnelle pour unites de commande de reseau - Google Patents

Repartition fonctionnelle pour unites de commande de reseau

Info

Publication number
EP1438827A1
EP1438827A1 EP02781141A EP02781141A EP1438827A1 EP 1438827 A1 EP1438827 A1 EP 1438827A1 EP 02781141 A EP02781141 A EP 02781141A EP 02781141 A EP02781141 A EP 02781141A EP 1438827 A1 EP1438827 A1 EP 1438827A1
Authority
EP
European Patent Office
Prior art keywords
function
call control
control
call
network
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Withdrawn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
EP02781141A
Other languages
German (de)
English (en)
Inventor
Rainer Liebhart
Peter Leis
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 EP1438827A1 publication Critical patent/EP1438827A1/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Withdrawn legal-status Critical Current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
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1023—Media gateways
    • H04L65/103—Media gateways in the network
    • 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
    • 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
    • H04L65/1106—Call signalling protocols; H.323 and related
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer

Definitions

  • the ITU-T standard H.323 defines a protocol family for the standardized control of services in multimedia packet networks (in particular IP networks), i.e. of networks in which a plurality of different services can be transmitted. These services, which are implemented in a unified, multimedia environment, are also called 'multimedia applications'.
  • multimedia application includes both services such as ordinary telephony (keyword 'Voice over IP (VoIP)'), as well as services such as fax, telephone conference, video conference, video on demand (VoD) and the like.
  • the essential network components of the packet-oriented H.323 are endpoints (EP units that want to use applications such as a PC client), gateways (GW) for the transition to the line-oriented telephone network, multipoint control units (MCU) for controlling conferences and gatekeepers ( GK).
  • EP units that want to use applications
  • GW gateways
  • MCU multipoint control units
  • GK gatekeepers
  • a gatekeeper controls access to the IP network for all H.323 network components (endpoints, GW, MCU) that belong to its zone.
  • the following functions are assigned to a GK:
  • H.225 Call Signaling and RAS Registration, Admission, Status
  • the gatekeeper terminates both RAS and H.225 call signaling and derives at least the corresponding actions that are required as part of the authentication, authorization, address resolution, call and connection control functions.
  • a border element in which the entire gatekeeper functionality is implemented must always be set up during the transition between two networks - e.g. the intranet of a network operator with a gatekeeper and the Internet - due to the monolithic structure of the gatekeeper. Scaling is only possible as a whole, but not function-specifically, which makes scalability and redundancy more difficult. This is economically disadvantageous.
  • the object of the invention is to show a way in which the scalability of a monolithically structured gatekeeper can be improved.
  • the reduced-function, simplified border element regulates and then only controls access to the network of the service provider. In the following it is also called 'Access Control Element'.
  • the comparatively complex call control functions are located in one or a few call processing units - hereinafter also called 'call control element'.
  • a call control element is advantageously arranged centrally. If a provider offers transitions to different networks, it is advantageous to set up only one access control element per transition, while the use of an additional call control element is often not necessary because of the proposed centralization.
  • An H.323 gatekeeper is divided into two independent network elements. Based on the different tasks of a gatekeeper, the previous gatekeeper described in the H.323 standard is replaced by one or more simplified border elements and one or more call control elements.
  • the function split according to the invention is shown in FIG. 1, an arrangement of the elements according to the invention in the network in FIG. 2.
  • the proposed, simplified border element has the task of enabling the transition between the network of the end point and that of the service provider.
  • the border element is initially reduced to the main functions 'Access Control'.
  • the 'Signaling Proxy' function can also be added.
  • the Access Control function is based on processing the RAS messages of the H.323 standard, which are sent by the endpoint to indicate a registration or connection request.
  • the border element terminates the RAS messages and carries out the authorization of the endpoint, in the simplest case by checking a user ID and a password.
  • the signaling proxy function includes the correct forwarding of incoming H.225 call signaling and H.245 connection control messages. Since the border element does not perform any classic call processing tasks, all H.225 and H.245 messages are passed on transparently to the call control element. This is done both for originating traffic from an end point and for end traffic to an end point. With this function, the endpoints advantageously do not require any knowledge of the structure of the provider network.
  • the signaling proxy function of the border element thus takes over NAT (Network Address Translation) functionality for the H.225 / H.245 messages. This fact is shown in Figure 3.
  • safety functions can be implemented in the border element.
  • the border element can thus guarantee both the authenticity of the end point and the integrity of the messages at the H.323 level (firewall functionality).
  • the security mechanisms are applicable to both H.225 and H.245 messages.
  • the proposed, newly defined call control element terminates and processes the connection-relevant signaling stanchions H.225 and H.245. Because of the described separation of the gatekeeper, the call control element requires no knowledge of the RAS signaling. Based on the H.225 and H.245 messages, the call control element is responsible for the call processing tasks that are also known from TDM (Time Division Multiplex) technology. These are, for example
  • the invention describes a way of splitting the monolithic gatekeeper architecture described in the H.323 standard.
  • the split is based on the different tasks of the gatekeeper. Through the described path, the different tasks can also be performed by different network elements (access control element and call control element).
  • the described functional separation of the gatekeeper also enables physical separation in which the different gatekeeper functions are implemented on different computers in the network. This physical separation into N border elements and M call control elements (typically N> M) makes it possible to expand or reduce the number of border elements and call control elements independently of one another, which results in better scalability and redundancy.
  • FIG. 1 shows an arrangement of the invention with an end point EP and an assigned gatekeeper GK, which according to the invention comprises a call control element CE comprising the function Call Control CC and the functions Access Control AC and Signaling Proxy SP comprehensive border element BE is disassembled,
  • FIG. 2 shows a network of three networks KN in which two border elements BE according to the invention for connecting the networks KNi, KN 2 to the network KN 3 and a central call control element CE are arranged,
  • FIG. 3 shows an arrangement of the invention for illustrating the mode of operation of the signaling proxy SP function arranged in a border element BE according to the invention.
  • an H.323 end point EP sets up a telephone connection in the public Internet via a gatekeeper GK.
  • the gatekeeper functionality is divided into a border element BE comprising the Access Control AE function and optionally the Signaling Proxy SP function and a Call Control Element CE comprising the Call Control CC function.
  • the end point EP first registers via a message RRQ (Registration Request) at the gatekeeper address known to it for RAS. This is the public IP address of the border element BE.
  • the border element BE checks the authorization of the participant (possibly by using an external, central database) and confirms the registration with a message RCF (Registration Confirm).
  • the end point EP wants to establish a connection, it sends a message ARQ (Admission Request) to the border element BE.
  • ARQ Admission Request
  • the access control tasks of the border element BE are ended by sending the confirmation message ACF (Admission Confirm).
  • H.225 and H.245 e.g. H.225 Setup, Alert or Connect
  • All subsequent H.225 and H.245 e.g. H.225 Setup, Alert or Connect
  • proxy function SP in the border element BE
  • Known IP address of the call control element CE forwarded.
  • the call control element CE is advantageously protected against direct and possibly improper access by the end points EP.
  • the Call Control Element CE now builds based on information in the H.225 messages and in - e.g. central - subscriber data, to which it also has access, the connection and provides the features desired by the subscribers.
  • the following diagram schematically shows the flow of messages when establishing a connection.

Landscapes

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

Abstract

Les fonctions (AC, CC) associées à une fonction de commande (GK) sont réparties sur au moins deux unités, un élément périphérique (BE) et un élément de gestion de communication (CE). Au moins la fonction contrôle d'accès (AC) est allouée à l'élément périphérique (BE) et au moins la fonction gestion de communication (CE) est affectée à l'élément de gestion de communication (CE). En outre, l'élément périphérique (BE) comprend de préférence une fonction serveur mandataire de signalisation (SP) pour transmettre des messages (H.225, H.245) de l'élément de gestion de communication (CE).
EP02781141A 2001-10-22 2002-10-22 Repartition fonctionnelle pour unites de commande de reseau Withdrawn EP1438827A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10152015A DE10152015A1 (de) 2001-10-22 2001-10-22 Functionsplit für Einheiten zur Netzsteuerung
DE10152015 2001-10-22
PCT/DE2002/003981 WO2003039096A1 (fr) 2001-10-22 2002-10-22 Repartition fonctionnelle pour unites de commande de reseau

Publications (1)

Publication Number Publication Date
EP1438827A1 true EP1438827A1 (fr) 2004-07-21

Family

ID=7703269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02781141A Withdrawn EP1438827A1 (fr) 2001-10-22 2002-10-22 Repartition fonctionnelle pour unites de commande de reseau

Country Status (4)

Country Link
US (1) US20040264480A1 (fr)
EP (1) EP1438827A1 (fr)
DE (1) DE10152015A1 (fr)
WO (1) WO2003039096A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7830861B2 (en) * 2003-10-16 2010-11-09 At&T Intellectual Property Ii, L.P. Method and apparatus for functional architecture of voice-over-IP SIP network border element
DE102004039407A1 (de) * 2004-08-13 2006-02-23 Siemens Ag Kommunikationssystem, Verfahren zum Anmelden in einem Kommunikationssystem und Netzwerkverbindungs-Rechner
CN107241565B (zh) * 2017-05-02 2020-03-31 苏州科达科技股份有限公司 多媒体会议系统及其通讯方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7092379B1 (en) * 1996-10-30 2006-08-15 8×8, Inc. Internet telephony arrangement and method
NO325207B1 (no) * 1999-03-02 2008-02-25 Ericsson Telefon Ab L M Anordning relatert til en anropsprosedyre
US6650619B1 (en) * 1999-03-17 2003-11-18 Utstarcom Incorporated Method and system for facilitating increased call traffic by reducing signaling load in an emergency mode
US6690651B1 (en) * 1999-07-22 2004-02-10 Nortel Networks Limited Method and apparatus for automatic transfer of a call in a communications system in response to changes in quality of service
SE518288C2 (sv) * 1999-08-11 2002-09-17 Ericsson Telefon Ab L M Arrangemang och metod för att tillhandahålla kommunikation mellan ändpunkter i ett IP-nätverk
KR100338683B1 (ko) * 1999-12-29 2002-05-30 정 데이비드 통합 아이피 콜 라우팅 시스템
GB2358986B (en) * 2000-01-17 2004-03-10 Mitel Corp Simple supplementary service protocol
US6788939B2 (en) * 2000-05-18 2004-09-07 International Business Machines Corporation Service deployment architecture
KR100360274B1 (ko) * 2000-12-30 2002-11-09 엘지전자 주식회사 Ｎａｔ 기반 로컬망에서 범용 ｉｐ 전화통신 시스템을지원하는 방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03039096A1 *

Also Published As

Publication number Publication date
DE10152015A1 (de) 2003-05-22
WO2003039096A1 (fr) 2003-05-08
US20040264480A1 (en) 2004-12-30

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