WO2006089592A1 - Procede de maintien d'appels sip en cas de defaillance du materiel de systemes ip redondants - Google Patents

Procede de maintien d'appels sip en cas de defaillance du materiel de systemes ip redondants Download PDF

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Publication number
WO2006089592A1
WO2006089592A1 PCT/EP2005/054653 EP2005054653W WO2006089592A1 WO 2006089592 A1 WO2006089592 A1 WO 2006089592A1 EP 2005054653 W EP2005054653 W EP 2005054653W WO 2006089592 A1 WO2006089592 A1 WO 2006089592A1
Authority
WO
WIPO (PCT)
Prior art keywords
protocol
sip
data
sdp
call
Prior art date
Application number
PCT/EP2005/054653
Other languages
German (de)
English (en)
Inventor
Klaus Hoffmann
Original Assignee
Nokia Siemens Networks Gmbh & 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 Nokia Siemens Networks Gmbh & Co. Kg filed Critical Nokia Siemens Networks Gmbh & Co. Kg
Priority to EP05794712A priority Critical patent/EP1856920A1/fr
Publication of WO2006089592A1 publication Critical patent/WO2006089592A1/fr

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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
    • H04L65/1023—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
    • H04L65/10—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
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0025—Provisions for signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13034—A/D conversion, code compression/expansion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13103—Memory
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13109—Initializing, personal profile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13167—Redundant apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13176—Common channel signaling, CCS7
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13196—Connection circuit/link/trunk/junction, bridge, router, gateway
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13204—Protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13389—LAN, internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13396—Signaling in general, in-band signalling

Definitions

  • Newer communication architectures provide for the separation of switching networks in connection service-related units and the transport of the user information (Bearer Control). This results in a decomposition / separation of connection establishment and medium or. Bearer construction.
  • the About ⁇ transmission of the useful information (switching through the data channel) can thereby technologies across different high bit rate Transporttech ⁇ such as ATM, IP and Frame Relay made.
  • the currently tied networks in narrow ⁇ -run telecommunications services are band networks in broad ⁇ to realize.
  • the subscribers are connected either directly (eg via a DSS1 protocol) or via exchanges configured as media gateway controllers (MGC) (eg via the ISUP protocol).
  • MSC media gateway controllers
  • the Nutzinformati ⁇ tions themselves are converted via Media Gateways (MG) in the per ⁇ wells used transport technology.
  • the control of the media gateway is performed by respectively arrange ⁇ th Media Gateway Controllers (MGC).
  • MMC Media Gateway Controllers
  • MGCP protocol or the H.248 protocol.
  • An adequate protocol to the BICC protocol was developed by the IETF standardization body with the SIP protocol (RFC3261) or the addition SIP-T (RFC3204). With the latter, ISUP messages can be transmitted - in contrast to the SIP protocol.
  • the transmission of the ISUP messages is generally carried out by tunnel, ie by transparent fürrei ⁇ chen.
  • the object of the invention is to indicate a way in which, in the event of failure of IP devices, a call can still be kept stable.
  • the advantage of the invention lies in the fact that, with the aid of the SIP Basis RFC 3261 and MGCP RFC 2705 and H.248 recommendation or BICC recommendation Q.1902.x / Q.1901, a simple and easy to implement method for the replacement of SDP data at equivalent circuit to the spare hardware in a SIP / MGCP / H248 network element for Availability checked ⁇ supply is to run to further features in a Cail.
  • FIG. 1 shows the basic relationships between 2 PSTN subscribers, between which an Internet network is arranged.
  • FIG. 2 shows the conditions on the B side in the event of the failure of a SIP device
  • FIG. 3 shows the conditions on the A side and the B side in the event of the failure of a SIP device
  • FIG. 4 shows the conditions when Raceconditions
  • a network configuration is shown, on which the inventive method comes to drain.
  • two PSTN networks are disclosed, in each of which a plurality of PSTN subscribers are arranged in a known manner. These are brought to local exchanges LE, which in turn are connected to transit exchanges TX.
  • the signaling information is supplied from the transit exchange TX immediately above a ISUP protocol Pro ⁇ a respective associated media gateway controller MGC (MGC A or MGC B).
  • MGC A or MGC B media gateway controller
  • the user information is transmitted to a (on the input side) arranged Media Gateway MG (MG A or MG B), which acts as an interface between the TDM network and an ATM or IP transmission network and are transmitted packet-oriented over the relevant transmission network.
  • the media gateway MG A is also controlled by the media gateway controller MGC A, such as the Media Ga ⁇ B teway MG by the media gateway controller MGC B.
  • the media gateway controller MGC In the case of transmission of the payload information by the media gateway MG to the media gateway MG A B are the payloads again under the control of the media gateway MG B assigned Media Gate ⁇ way controller MGC B converted into a TDM data stream and supplied to the candidate PSTN participants. Between the media gateway controller MGC and the respective transmitted to ⁇ parent Media Gateway data are supported by a standardized protocol. This can be at ⁇ play as the MGCP or H.248 protocol. Between the two Media Gateway Controllers MGC A, MGC B is present Preferably, according to the present embodiment, the SIP Pro ⁇ tokoll used. In the signaling path wei ⁇ tere devices such as SIP proxies or SIP units SIP E can be switched.
  • Fig. 2 the failure of a SIP device HWEl is shown.
  • This can be, for example, the SIP proxy device shown in FIG. Failure of device HWE1 is verified by device HWE2. The latter takes over the function of the device HWEl but has according to the present
  • Embodiment still no information about the SDP data of the two endpoints.
  • the device HWE2 another, previously already in the signaling path device (eg, SIP E) to transmit this information. This is done by sending a Re-INVITE message without SDP information. Furthermore, an additional determination is made that the SIP session timer monitoring function is carried out immediately from the device HWE2.
  • the SIP partner SIP E acknowledges (either because it feels addressed to itself or passes on the request and then receives an acknowledgment and forwards it), the received Re-INVITE message without SDP information with a 200 OK acknowledgment, the desired SDP Information includes (RFC3264). Thus, both endpoints know that the call is okay. Billing and call do not need to be stopped.
  • Fig. 3 the entire operation sequence for the A-side and the B-side is shown.
  • the device HWE2 using the standard Re-INVITE message - as just described - the SDP information from the B-side queries (Re-INVITE without SDP).
  • the SDP information is passed to the B-side, whereby the device HWE2 can now store the received SDP information of the B-side (SDP B).
  • this information SDP B is now sent in a re-INVITE message to the A-side.
  • the A-side responds in turn with its own SDP information SDP A in the 200 OK receipt.
  • the information SDP A is in turn stored in the device HWE2.
  • SDP A is sent (SDP A) in an ACK message to the B-side.
  • the device HWE2 has again stored all the data for the successful handling of features.
  • the Cail must be no longer triggered the following by ⁇ feature requirements. Subsequent features such.
  • SIP session timer expiration no longer have to be passed through, but are handled at the respective endpoint of the B2BUA.
  • the involved A and B sides were used to restore the synchronization.
  • race conditions can occur. This means that the device HWE2 does not arrive in time to send the above-described Re-INVITE message before the remote end itself receives a Re-INVITE message (with or without SDP) (feature request by user activity). This is especially because the SETUP ⁇ gen HWEl and HWE2 are designed as highly integrated hardware units to control many important calls simultaneously. Accordingly, this received message is then also uses to restore the current SDP data on the HWE2 device.
  • Fig. 4 the corresponding ratios are shown.
  • the received Re-INVITE message is accepted, the SDP data of the B-side SDP B is stored, and mapped to the Re-INVITE information to the A-side.
  • the A-side beant ⁇ wortet this your part with their own SDP SDP data A. These are in turn stored in the device HWE2 and sent to the 200 OK acknowledgment to the B-side. Again, this is the
  • a SIP device fails.
  • an MGCP (or H.248) device may fail.
  • a DLCX and CRCX message without SDP is sent, and the CRCX ACK is sent to the other side with the local SDP.
  • MDCX instead of DLCX / CRCX is possible.
  • SIP Re-INVITE / or UPDATE With SDP.
  • the SIP Ant ⁇ word is again converted into a MDCX message with the SDP the re- mote side. This has the MGCP device per ⁇ wells also have the option to save the SDP data.
  • NEN Kgs ⁇ also in a unit that provides the interworking of MGCP to H323, VoDSL, VT, or SIP, BICC, come to the end.
  • BICC the CRCX ACK is mapped with SDP to a BICC bearer redirect request message or, in the case of the MGCP protocol, to an MDCX with SDP.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (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

L'état de la technique ne peut répondre aux exigences élevées en matière de sécurité d'appels SIP, étant donné que les données significatives pour ledit appel, qui sont traitées de manière dynamique selon les normes lors de l'établissement d'une communication, doivent être restaurées en cas de défaillance du dispositif par lequel la communication passe. La raison en est que les données relatives aux points terminaux connues sous l'appellation de données SDP (protocole de description de session) ne sont pas présentes dans le dispositif redondant commuté en remplacement, en cas d'erreur. L'invention permet de résoudre ce problème dans la mesure où lors de la commutation sur le dispositif redondant, les données spécifiques de points terminaux sont extraites, par l'intermédiaire de messages relatifs au protocole, d'un noeud adjacent où ces données sont mémorisées, puis sont transmises au dispositif redondant.
PCT/EP2005/054653 2005-02-22 2005-09-19 Procede de maintien d'appels sip en cas de defaillance du materiel de systemes ip redondants WO2006089592A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05794712A EP1856920A1 (fr) 2005-02-22 2005-09-19 Procede de maintien d'appels sip en cas de defaillance du materiel de systemes ip redondants

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005008052 2005-02-22
DE102005008052.9 2005-02-22

Publications (1)

Publication Number Publication Date
WO2006089592A1 true WO2006089592A1 (fr) 2006-08-31

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PCT/EP2005/054653 WO2006089592A1 (fr) 2005-02-22 2005-09-19 Procede de maintien d'appels sip en cas de defaillance du materiel de systemes ip redondants

Country Status (2)

Country Link
EP (1) EP1856920A1 (fr)
WO (1) WO2006089592A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9706019B2 (en) 2006-12-29 2017-07-11 Huawei Technologies Co., Ltd. Method, system, and network element for service processing after data of network element is invalid or network element fails

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ROSENBERG J: "Reconstituting Call State in SIP User Agents", IETF INTERNET DRAFT <DRAFT-ROSENBERG-SIP-RECONSTITUTE-00.TXT>, 13 July 2001 (2001-07-13), XP015034717 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9706019B2 (en) 2006-12-29 2017-07-11 Huawei Technologies Co., Ltd. Method, system, and network element for service processing after data of network element is invalid or network element fails

Also Published As

Publication number Publication date
EP1856920A1 (fr) 2007-11-21

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