WO2004028092A1 - Procede pour reproduire des informations dans un systeme de reseau a commutation de circuit base sur atm/aal2 - Google Patents

Procede pour reproduire des informations dans un systeme de reseau a commutation de circuit base sur atm/aal2 Download PDF

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Publication number
WO2004028092A1
WO2004028092A1 PCT/DE2002/003471 DE0203471W WO2004028092A1 WO 2004028092 A1 WO2004028092 A1 WO 2004028092A1 DE 0203471 W DE0203471 W DE 0203471W WO 2004028092 A1 WO2004028092 A1 WO 2004028092A1
Authority
WO
WIPO (PCT)
Prior art keywords
atm
aal2
multicasting
information
network system
Prior art date
Application number
PCT/DE2002/003471
Other languages
German (de)
English (en)
Inventor
Bart Baekelandt
Herbert Heiss
Werner Kober
Thierry Nedelec
Norbert Seitter
Alejandro Valenzuela
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU2002347137A priority Critical patent/AU2002347137A1/en
Priority to PCT/DE2002/003471 priority patent/WO2004028092A1/fr
Priority to DE10297817T priority patent/DE10297817D2/de
Publication of WO2004028092A1 publication Critical patent/WO2004028092A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/20—Support for services
    • H04L49/201—Multicast operation; Broadcast operation
    • H04L49/203—ATM switching fabrics with multicast or broadcast capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5603—Access techniques
    • H04L2012/5604—Medium of transmission, e.g. fibre, cable, radio
    • H04L2012/5607—Radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/564—Connection-oriented
    • H04L2012/5642—Multicast/broadcast/point-multipoint, e.g. VOD
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5652—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly
    • H04L2012/5653—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL]
    • H04L2012/5656—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly using the ATM adaptation layer [AAL] using the AAL2

Definitions

  • the invention relates to a method for multicasting information in a circuit-switched network system based on ATM / AAL2.
  • circuit-switched network systems based on ATM / AAL2 as for example in a UMTS system
  • Netzsys- a need exists for a duplication or to mul- ti and broadcasting of information in different connections'. So far, only an ATM-based multicasting was required and implemented. So far, there has been no application of multicasting at the AAL2 level.
  • UMTS which leads to AAL2 or compels it to be used, multicasting now also makes sense at the AAL2 level.
  • a method for duplicating or multicasting information is provided in a circuit-switched network system based on ATM / AAL2, the multicasting being carried out in two successive stages.
  • the first stage of multicasting is via an ATM-based duplication or an ATM multicast in an ATM network node, a so-called ATM switch, and in the second stage a further multicasting based on AAL2 is carried out.
  • a first multicasting of the information on the part of the ATM network node to surrounding specific subassemblies of a UMTS network node takes place.
  • the specific subassemblies can be so-called coupling assemblies.
  • a further multicasting is carried out, starting from the corresponding subassemblies, for a plurality of connections as required.
  • the method multicasts tones.
  • tones from the PSTN Public Switched Telephone Network
  • TDM Time Division Multiplex
  • the tones were generated as so-called PCM signals.
  • PCM pulse code modulation
  • analog input signals are converted into digital signals and transmitted digitally.
  • a PCM-encoded speech signal was then replaced by a PCM-encoded audio signal.
  • PLMN Public Land Mobile Network
  • Each call or connection was a TDM call or a TDM connection, for example in the case of GSM, or at least a call based on ATM / AAL2 in part ran via a TDM part.
  • a call based on ATM / AAL2 Traffic decoded on a TDM basis then tones inserted and the
  • this problem is solved in that, on the one hand, multicast functionality is used by ATM systems and, furthermore, the generation and provision of tones takes place in two stages.
  • the information such as tones, is generated in a central unit or in a generator.
  • This central unit or generator preferably forms an assembly of the UMTS network node.
  • a central unit goes hand in hand with easier administration.
  • the information generated in this way is then reproduced according to the invention in a first stage via an ATM multicast and fed to the specific subassembly of the UMTS network node which is in the vicinity and which requires the information, for example tones, to be fed into certain connections.
  • the multicasting is preferably carried out via an ATM connection to all neighboring or affected sub-groups of the UMTS network node.
  • Each of the available variants of information such as, for example, the various available variants of tones, are sent to each affected subassembly of the UMTS network node exactly once.
  • these can also be broadcast announcements that are not always at the beginning of a connection for a subscriber. must, but can be imported during an existing connection.
  • the central unit or the central generator which for example generates tones and makes them available for multicasting, can generate and deliver all types of tones which are required in a particular system.
  • UMTS has 9 ways of transmitting voice.
  • voice data can be transmitted uncompressed, ie with 64 kbit / s or compressed in one of 8 existing AMR (adaptive multi rate) modes, each with a different degree of compression.
  • tones should now preferably be distributed in parallel in all 9 possible transmission modes (codec modes).
  • codec modes transmission modes
  • the central unit or the central generator provides the relevant information as a frame formatted according to a framing protocol, such as UMTS in a user plane frame (UP frame), which in turn is segmented into AAL2 packets and packed in ATM cells are available.
  • a framing protocol such as UMTS in a user plane frame (UP frame)
  • UP frame user plane frame
  • the differentiation of the different tones is based on a combination of VCI / CID.
  • VCI Virtual Channel Identifier
  • CID Channel Identifier
  • the VCI / CID combination enables a subscriber to be clearly identified. For each tone that is coded in a certain codec mode, only one multicast connection is required in the entire system due to the multicast layer 1 of the ATM multicast.
  • the ATM and AAL2 connections are preferably permanent connections.
  • the central unit or the central generator preferably works redundantly.
  • Each surrounding specific subassembly of the UMTS network node that has to deliver a tone for a connection copies the corresponding AAL2 packet that was sent in the corresponding ATM cell into the subassembly by the central generator. This copy, which is created on the basis of AAL2, is then fed into the corresponding connection.
  • the central unit for generating information such as for generating tones
  • a certain desired information such as a certain tone, does not always have to be generated locally anew. The latter is very ineffective and also entails the risk that inconsistent information or an inconsistent tone would be created, which can vary from generator to generator.
  • FIG. 2 Schematic representation of the proposed 2 stages of a further embodiment of the method according to the invention.
  • FIG. 1 shows the generation and multicasting of tones for a UMTS network node or a so-called UMTS media gateway. Shown here are two central tone generators 1, each of which generates a specific tone. Both generators 1 continuously send the sound you have generated as an ATM cell at intervals of approximately 20 ms to an ATM network node 2, a so-called ATM switch. An ATM cell contains an AAL2 packet specific to the corresponding tone, for example an SSCS or CPS packet according to the 3GPP standard. The sound generated by a generator 1 is sent in all of its variants or all possible codings or modes, as already explained. The various tones are then forwarded from the ATM network node 2 to all surrounding specific subassemblies 3 of the UMTS network node via ATM connections, such as VCI. The specific subassemblies of the
  • UMTS network nodes are then in each case able to make copies of desired tones for specific connections and then to feed these tones into the respective connection.
  • the first stage corresponds to duplication or multicasting at the ATM level.
  • An ATM cell 4 comprises one Cell head 5, which contains a specific address (VCI) for controlling the ATM cell 4 by the network system, and an information field 6 in which useful information to be transported is displayed.
  • VCI specific address
  • the useful information consists of two AAL2 packets 7
  • duplication is now formed in two new ATM cells 8, the respective information field 9 of which contains the same useful information, namely the two AAL2 packets 7, but whose cell headers now have different addresses, which means that the same useful information is achieved is forwarded in parallel to different network elements.
  • FIG. 2b shows the second stage of a sequence of a further embodiment of the method according to the invention.
  • AAL2-based duplication takes place here.
  • An ATM cell 4 is dissolved with the omission of the ATM cell header 5 and the AAL2 packets 7 located in the information field 6 are extracted therefrom.
  • Each AAL2 packet 7 also has a head 10, which comprises a specific address (CID), and an information field 11, which contains the information to be reproduced.
  • CID specific address
  • two AAL2 packets 12 with different addresses are formed from an AAL2 packet 7, the respective information in the respective information field 13 being the same as in the corresponding original AAL2 packet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé pour reproduire des informations (multidiffusion) dans un système de réseau à commutation de circuit basé sur ATM/AAL2, notamment dans un système de réseau UMTS, la reproduction (multidiffusion) s'effectuant en deux étapes successives.
PCT/DE2002/003471 2002-09-11 2002-09-11 Procede pour reproduire des informations dans un systeme de reseau a commutation de circuit base sur atm/aal2 WO2004028092A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2002347137A AU2002347137A1 (en) 2002-09-11 2002-09-11 Method for duplicating information in an atm/aal2-based circuit-switched network system
PCT/DE2002/003471 WO2004028092A1 (fr) 2002-09-11 2002-09-11 Procede pour reproduire des informations dans un systeme de reseau a commutation de circuit base sur atm/aal2
DE10297817T DE10297817D2 (de) 2002-09-11 2002-09-11 Verfahren zur Vervielfältigung von Informationen in einem auf ATM/AAL2 basierenden Leitungsvermittelten Netzsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2002/003471 WO2004028092A1 (fr) 2002-09-11 2002-09-11 Procede pour reproduire des informations dans un systeme de reseau a commutation de circuit base sur atm/aal2

Publications (1)

Publication Number Publication Date
WO2004028092A1 true WO2004028092A1 (fr) 2004-04-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/003471 WO2004028092A1 (fr) 2002-09-11 2002-09-11 Procede pour reproduire des informations dans un systeme de reseau a commutation de circuit base sur atm/aal2

Country Status (3)

Country Link
AU (1) AU2002347137A1 (fr)
DE (1) DE10297817D2 (fr)
WO (1) WO2004028092A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105103507A (zh) * 2014-01-28 2015-11-25 华为技术有限公司 网络功能虚拟化的方法及装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ARMITAGE G J: "IP MULTICASTING OVER ATM NETWORKS", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, IEEE INC. NEW YORK, US, vol. 15, no. 3, 1 April 1997 (1997-04-01), pages 445 - 457, XP000683940, ISSN: 0733-8716 *
ENEROTH G ET AL: "APPLYING ATM/AAL2 AS A SWITCHING TECHNOLOGY IN THIRD-GENERATION MOBILE ACCESS NETWORKS", IEEE COMMUNICATIONS MAGAZINE, IEEE SERVICE CENTER. PISCATAWAY, N.J, US, vol. 37, no. 6, June 1999 (1999-06-01), pages 112 - 122, XP000835287, ISSN: 0163-6804 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105103507A (zh) * 2014-01-28 2015-11-25 华为技术有限公司 网络功能虚拟化的方法及装置
CN105103507B (zh) * 2014-01-28 2018-01-05 华为技术有限公司 网络功能虚拟化的方法及装置

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Publication number Publication date
AU2002347137A1 (en) 2004-04-08
DE10297817D2 (de) 2005-07-28

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