WO2000067517A1 - Multiplex system having layer 1 transmission channels and signaling transmission channels - Google Patents

Multiplex system having layer 1 transmission channels and signaling transmission channels Download PDF

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Publication number
WO2000067517A1
WO2000067517A1 PCT/DE2000/001179 DE0001179W WO0067517A1 WO 2000067517 A1 WO2000067517 A1 WO 2000067517A1 DE 0001179 W DE0001179 W DE 0001179W WO 0067517 A1 WO0067517 A1 WO 0067517A1
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WIPO (PCT)
Prior art keywords
information
isdn
transmission
signaling
multiplex system
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PCT/DE2000/001179
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German (de)
French (fr)
Inventor
Frank-Dieter Richter
Oliver Fuchs
Original Assignee
Siemens Aktiengesellschaft
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Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP00929290A priority Critical patent/EP1174000A1/en
Publication of WO2000067517A1 publication Critical patent/WO2000067517A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0435—Details
    • H04Q11/0457—Connection protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1623—Plesiochronous digital hierarchy [PDH]
    • H04J3/1647—Subrate or multislot multiplexing
    • 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
    • H04Q2213/13178—Control signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13202—Network termination [NT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13203—Exchange termination [ET]
    • 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
    • H04Q2213/13209—ISDN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13216—Code signals, frame structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13292—Time division multiplexing, TDM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13367—Hierarchical multiplexing, add-drop multiplexing

Definitions

  • the communication terminals such as, for example, ISDN communication terminals
  • the communication terminals are connected over longer distances via multiplex systems.
  • various information is additionally transmitted between the exchange-side and the communication terminal-side multiplexer and in the opposite direction - such as described in the publication "Flexibel Multiplexer FMX", Siemens AG, 1995.
  • This information represents signaling information - in the case of ISDN communication terminals, D-channel signaling information - as well as bad-1 information and company-specific information.
  • the transmission technology layer i.e. controlled the transmission technology, which in particular represents the information activating or deactivating the transmission technology, indicating the operating state and controlling test loops.
  • the information is transmitted from one multiplexer to the opposite multiplexer via lines, in particular metallic and optical conductors.
  • Transmission channels are provided for the transmission of the information, the transmission speed of a transmission channel usually being 64 or 56 kbit / s in multiplexers.
  • a transmission channel of 64 kbit / s or 56 kbit / s is usually provided for the transmission of the message information, with digitized speech information being able to be compressed and several speech channels being routed via one transmission channel.
  • an ISDN connection is an additional transmission channel for the transmission of the signaling information, the Sch ⁇ cht-1 information and the company-specific information provided.
  • the object of the invention is to use the transmission channels more efficiently for the information to be transmitted in addition to the message information.
  • the problem is solved on the basis of a multiplex system according to the features of the preamble of claim 1 by its characterizing features.
  • the essential aspect of the multiplex system according to the invention can be seen in the fact that at least one predefined transmission channel is used exclusively for the transmission of ISDN signaling information and ISDN operation-specific information and another predefined transmission channel is used exclusively for the transmission of ISDN Schicht 1 information is provided, the ISDN Sch ⁇ cht 1 information of the transmission channels being transmitted in a static mode.
  • the Sch ⁇ cht 1 information By transmitting the Sch ⁇ cht 1 information in a separate transmission channel for all communication terminals connected on the communication terminal side and by transmitting signaling information from several connected communication terminals together with the transmission-specific information, transmission channels can be saved, in particular when ISDN communication terminals are connected.
  • the ISDN Sch ⁇ cht 1 information is represented here by layer 1 activation deactivation information, by layer 1 loop control information and by layer 1 status information.
  • Claim 2 is advantageous in the static mode, means for forming layer Coding words representing 1 information are provided - claim 3. With the aid of the coding words, a number of bad-1 information items can be provided - for example, with four bits, sixteen coding words or sixteen different bad-1 information items.
  • the multiplexers means for the transmission of the predetermined static m, another transmission channel in accordance with a loadlichfugten Codierworter Look - method is provided - Claim 4. This causes a storunempfmdli- chere while rapid transfer of Sch ⁇ cht-1- ⁇ infor mation, where the Sch ⁇ cht-1 information represents internal information, ie information relating only to the multiplexer.
  • the multiplexers have an ISDN protocol provided for the transmission of the ISDN signaling information for the transmission of the company-specific information - claim 5.
  • the ISDN signaling information is advantageous in accordance with the ISDN-oriented D-channel protocol formed - claim 6.
  • This protocol extension is based on an existing transmission protocol - advantageously the D-channel protocol - which is expanded with little additional economic effort and is also used for the transmission of company-specific information.
  • the multiplexers also have means for multiplexing the signaling channels of the communication terminals (KE) in the at least one transmission channel — claim 7. For example, four ISDN-compliant D channels, each with 16 kbit / s, are multiplexed into a predetermined transmission channel.
  • FIG. 1 is a block diagram of a multiplex system according to the invention
  • FIG. 2 is a block diagram of a realization relating to the signaling and bet ⁇ e-specific information in the multiplexers.
  • 1 shows a multiplex system which is formed by a multiplexer COT arranged on the switching system side and by a peripheral multiplexer RMT arranged on the communication terminal side.
  • the two multiplexers RMT, COT are connected to one another via, for example, a 2048 kbit / s connection V, connection V being able to be made via a communication network - for example a fixed communication network - indicated in FIG. 1 by an oval labeled KFN .
  • Network termination units NT are connected to the peripheral multiplexer RMT, a network termination unit NT being represented as representative of several connectable network termination units NT - with several connections V with 2048 kbit / s each between the multiplexers RMT, COT, several network termination units NT or communication terminals KE are connected to the peripheral ones Multiplexer RMT can be connected.
  • the network termination units NT are each connected to at least one communication terminal device KE - an example is shown which is connected to the network termination unit NT shown.
  • the communication terminals KE are implemented by ISDN communication terminals and are connected to the network termination units NT via an SO interface SO.
  • the network termination units NT are brought to the peripheral multiplexer RMT via the standardized UKO interfaces operating according to the echo compensation transmission method.
  • a transmission unit UK0 is provided for each network termination unit NT introduced, by means of which the echo compensation transmission method is also implemented.
  • two transmission channels TC are brought to the peripheral multiplexer RMT at a transmission speed of 64 kbit / s, the two message channels TC being transparent to a switching device via the peripheral multiplexer RMT and the connection V via the multiplexer COT. are led.
  • These two transmission channels TC ⁇ the messages, for example, a digitized - received speech information.
  • the network termination units NT each route a signaling channel D to the peripheral multiplexer RMT.
  • the signal I D has a ⁇ s istskanal Ubertragungsgeschwmdtechnik of 16 kbit / s and ISDN Signaltechnischsmformation d is formed according to the standard D-channel protocol and uber- averages.
  • signaling channels D m of the two multiplexers RMT, COT m are at least one predetermined transmission channel SC. multiplexed at a transmission speed of 64 kbit / s. At a transmission speed of 16 kbit / s signaling channel D, four signaling channels D are combined in the predetermined transmission channel SC. If, for example, 12 ISDN basic connections SO are connected to the peripheral multiplexer RMT, there are three predetermined transmission channels SC in each transmission direction. required.
  • the packet-oriented signaling information d are transmitted via the predefined transmission channels SC. transparent, ie transmitted unchanged. Furthermore, the transmission channels SC. arranged signaling channels D additionally transmit the information that is not intended for the multiplexer RMT, COT itself.
  • EOC Embedded Operational Channel
  • a protocol extension of the D-channel protocol is advantageously provided for the transmission of this additional information eoc, with which information can additionally be transmitted in the signaling channel D or in the D-channel.
  • the presence of the protocol extension is verified as part of the initialization of the multiplexer RMT, COT at the respective counter-multiplexer COT, RMT and the protocol extension is activated if present.
  • a further transmission channel CM - for example Ubertra ⁇ supply channel 16 - exclusively for the transmission of Sch ⁇ cht-1-il Informat ⁇ onen as activation and deactivation rungsmformationen defined between the two multiplexers RMT, COT.
  • Such Sch ⁇ cht-1 information il represent, for example, activation and deactivation formations for closing test loops in the multiplexer RMT, COT or for activating or deactivating transmission-related units or for displaying signal losses.
  • the further transmission channel CM is structured here into several subchannels , in which the information to be transmitted is entered statically. For example, each subchannel comprises 4B ⁇ t, to which 16 coding levels or coding words can be assigned.
  • coding words 16 different pieces of information, for example commands or indications, can be transmitted and displayed to the respective counter-multiplexer.
  • Two coding words have a special meaning. Coding word 0000 must not be used, as otherwise there will be difficulties in interpreting the frame sync word and coding word 1111 indicates to the counter-multiplexer that there is no line connection module for the respective communication terminal KE present or inserted.
  • the different ISDN Sch ⁇ cht-1 information il are assigned to the other coding words.
  • the coding words or the Sch ⁇ cht-1 information il are transmitted at least three times for reasons of interference safety and should be received at least twice in succession - also known to the experts as "double last look" - in order to be rated as valid.
  • FIG. 2 shows a block diagram of the transmission path SPF of the peripheral and the reception path EPF of the multiplexer RMT, COT for the ISDN signaling information si to be transmitted and the ISDN operation-specific information eoc, the transmission and reception path SPF, EPF in each case is connected to an interface unit ISDNE.
  • the transmission-related interfaces UKO are implemented for the ISDN communication terminals KE to be connected.
  • the message channels - in ISDN the B channels - and the signaling channels, ie the D channels, are separated.
  • the ISDN-specific and e-specific information eoc formed by the interface units ISDNE or received by the communication terminals KE is passed to an output A of the interface units ISDNE.
  • the separate ISDN signaling information d with a transmission speed of 16 kbit / s is received in the transmission path SPF of the peripheral multiplexer RMT with an HDLC receiver HD-E in accordance with the protocol and is written into a buffer memory PS by this m.
  • ISDN operating-specific information eoc present at output A is likewise written into this buffer memory - indicated in FIG. 2 by an arrow labeled eoc.
  • the following HDLC receiver HD-E x which operates according to an extended signaling protocol, reads the written information eoc, d from the buffer memory PS and multiplexes the two information eoc, d again to a bit stream of 16 kbit / s.
  • This multiplexed bit stream forms an extended signaling channel D, which is multiplexed into the at least one predetermined transmission channel SC of 64 kbit / s.
  • This predetermined transmission channel CS is multiplexed the multiplex stream of 2048 kbit / s - not shown.
  • the signaling channels D are selected for each communication terminal device KE (not shown, by demultiplexing) and received by an HDLC receiver HD-E operating according to an extended ISDN signaling protocol.
  • the ISDN signaling information d and the ISDN operating-specific information eoc are again separated and separately written into a buffer memory PS.
  • an HDLC receiver HD-E reads the ISDN signaling information d and forwards it to the interface concerned.
  • the ISDNE which is implemented in the same way as in the peripheral multiple ⁇ xer RMT, continues.
  • the signaling channel D together with the two message channels B is routed to a switching device (not shown) via the transmission interface UKO.
  • the multiplexers RMT, COT are implemented in the same way - not shown in FIG. 2.
  • the invention is not limited to the exemplary embodiment, but can generally be used in multiplex systems with a plurality of transmission channels between the multiplexers RMT, COT, an expandable transmission protocol being provided for the transmission of the ISDN signaling information d.
  • the ISDN Sch ⁇ cht-1 information il can be very different.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

At least one predetermined transmission channel (SC..) which connects multiplexers (RMT, COT) is provided for transmitting ISDN signaling information (d) and ISDN operation-specific information (eoc). Said ISDN operation-specific information is transmitted via an expanded ISDN signaling transmission protocol. At least one additional transmission channel (MC) is provided for transmitting ISDN layer 1 information (i1). Said ISDN layer 1 information is transmitted via statically inserted coded information. This results in an efficient utilization of the transmission channels between the multiplexers (RMT, COT).

Description

Beschreibungdescription
Multiplexsystem mit Schιcht-1- und Signalisierungs-Ubertra- gungskanalenMultiplex system with Schicht 1 and signaling transmission channels
In Kommunikationsnetzen, insbesondere ISDN-Kommumkations- netzen, werden die Kommunikationsendgerate wie beispielsweise ISDN-Komirtunikationsendgerate über größere Entfernungen über Multiplexsysteme angeschlossen. Neben den Informationen - beispielsweise digitalisierten Sprachinformationen - werden zwischen dem vermittlungsseitigen und dem Kommunikationsend- gerate-seitigen Multiplexern und m umgekehrter Richtung verschiedene Informationen zusätzlich übertragen - wie beispielsweise m der Druckschrift "Flexibel Multiplexer FMX", Siemens AG, 1995 beschrieben. Diese Informationen stellen Si- gnalisierungsmformationen - bei ISDN-Kommunikationsendgera- ten D-Kanal-Signalisierungsmformationen - sowie Schιcht-1- Informationen und betriebsspezifische Informationen dar. Mit Hilfe der Schιcht-1-Informationen wird die ubertragungstech- nische Schicht, d.h. die Übertragungstechnik gesteuert, wobei diese insbesondere die die Übertragungstechnik aktivierende bzw. deaktivierende, den Betriebszustand anzeigende und Pruf- schleifen steuernde Informationen darstellen. Mit Hilfe der Übertragungstechnik werden die Informationen von einem Multi- plexer zum gegenüberliegenden Multiplexer ber Leitungen, insbesondere metallische und optische Leiter übertragen.In communication networks, in particular ISDN communication networks, the communication terminals, such as, for example, ISDN communication terminals, are connected over longer distances via multiplex systems. In addition to the information - for example digitized speech information - various information is additionally transmitted between the exchange-side and the communication terminal-side multiplexer and in the opposite direction - such as described in the publication "Flexibel Multiplexer FMX", Siemens AG, 1995. This information represents signaling information - in the case of ISDN communication terminals, D-channel signaling information - as well as bad-1 information and company-specific information. With the help of bad-1 information, the transmission technology layer, i.e. controlled the transmission technology, which in particular represents the information activating or deactivating the transmission technology, indicating the operating state and controlling test loops. With the help of the transmission technology, the information is transmitted from one multiplexer to the opposite multiplexer via lines, in particular metallic and optical conductors.
Für die Übertragung der Informationen sind Ubertragungskanale vorgesehen, wobei bei Multiplexern die Ubertragungsgeschwm- digkeit eines Ubertragungskanals meist 64 oder 56 kbit/s betragt. Für die Übertragung der Nachrichteninformationen ist meist ein Ubertragungskanal von 64 kbit/s bzw. 56 kbit/s vorgesehen, wobei digitalisierte Sprachinformationen komprimiert werden können und mehrere Sprachkanale über einen Ubertra- gungskanal gefuhrt werden. Des weiteren ist e ISDN-Anschluß ein zusätzlicher Ubertragungskanal für die Übertragung der Signalisierungsmformation, der Schιcht-1-Informatιon und der betriebsspezifischen Information vorgesehen. Dies bedeutet jedoch, daß für einen ISDN-Anschluß drei Ubertragungskanale mit je 64 kbit/s zwischen den Multiplexern erforderlich sind.Transmission channels are provided for the transmission of the information, the transmission speed of a transmission channel usually being 64 or 56 kbit / s in multiplexers. A transmission channel of 64 kbit / s or 56 kbit / s is usually provided for the transmission of the message information, with digitized speech information being able to be compressed and several speech channels being routed via one transmission channel. Furthermore, an ISDN connection is an additional transmission channel for the transmission of the signaling information, the Schιcht-1 information and the company-specific information provided. However, this means that three transmission channels with 64 kbit / s each are required between the multiplexers for an ISDN connection.
Der Erfindung liegt die Aufgabe zugrunde, die Ubertragungskanale für die zusatzlich zu den Nachrichteninformationen zu übertragenden Informationen effizienter zu nutzen. Die Aufgabe wird ausgehend von einem Multiplexsystem gemäß den Merkmalen des Oberbegriffs des Patentanspruchs 1 durch dessen kenn- zeichnende Merkmale gelost.The object of the invention is to use the transmission channels more efficiently for the information to be transmitted in addition to the message information. The problem is solved on the basis of a multiplex system according to the features of the preamble of claim 1 by its characterizing features.
Der wesentliche Aspekt des erfmdungsgemaßen Multiplexsystems ist darin zu sehen, daß zumindest ein vorgegebener Ubertragungskanal ausschließlich für die Übermittlung von ISDN-Sig- nalisierungsinformationen und ISDN-betriebsspezifischen Informationen und ein weiterer vorgegebener Ubertragungskanal ausschließlich für die Übermittlung von ISDN-Schιcht-1-Infor- mationen vorgesehen ist, wobei die ISDN-Schιcht-1-Informatιo- nen der Ubertragungskanale m einem statischen Modus ubertra- gen werden. Durch die Übertragung der Schιcht-1-Informationen m einem eigenen Ubertragungskanal für alle Kommunikations- endgerate-seitig angeschlossenen Kommumkationsendgerate und die Übertragung von Signalisierungsmformationen von mehreren angeschlossenen Kommunikationsendgeraten zusammen mit den oe- triebsspezifischen Informationen können Ubertragungskanale insbesondere bei Anschluß von ISDN-Kommunikationsendgeraten eingespart werden.The essential aspect of the multiplex system according to the invention can be seen in the fact that at least one predefined transmission channel is used exclusively for the transmission of ISDN signaling information and ISDN operation-specific information and another predefined transmission channel is used exclusively for the transmission of ISDN Schicht 1 information is provided, the ISDN Schιcht 1 information of the transmission channels being transmitted in a static mode. By transmitting the Schιcht 1 information in a separate transmission channel for all communication terminals connected on the communication terminal side and by transmitting signaling information from several connected communication terminals together with the transmission-specific information, transmission channels can be saved, in particular when ISDN communication terminals are connected.
Die ISDN-Schιcht-1-Informatιonen sind hierbei durch Schicht- 1-Aktιvιerungs-Deaktιvιerungsmformatιonen, durch Schιcht-1- Schleifensteueπnformationen und durch Schιcht-1-Zustandsm- formationen repräsentiert - Anspruch 2. Vorteilhaft sind beim statischen Modus Mittel zum Bilden von Schιcht-1-Informa- tionen repräsentierende Codierworter vorgesehen - Anspruch 3. Mit Hilfe der Codierworter können mehrere Schιcht-1-Informa- tionen - beispielsweise bei vier Bit sechzehn Codierworter bzw. sechzehn unterschiedliche Schιcht-1-Informatιonen. Des weiteren sind m den Multiplexern Mittel für die Übermittlung der statisch m den vorgegebenen, weiteren Ubertragungskanal eingefugten Codierworter gemäß einem Last Look - Verfahren vorgesehen - Anspruch 4. Hierdurch wird eine storunempfmdli- chere und trotzdem schnelle Übertragung der Schιcht-1-Infor¬ mationen bewirkt, wobei die Schιcht-1-Informatιonen interne, d.h. nur die Multiplexer betreffende Informationen darstellen.The ISDN Schιcht 1 information is represented here by layer 1 activation deactivation information, by layer 1 loop control information and by layer 1 status information. Claim 2 is advantageous in the static mode, means for forming layer Coding words representing 1 information are provided - claim 3. With the aid of the coding words, a number of bad-1 information items can be provided - for example, with four bits, sixteen coding words or sixteen different bad-1 information items. Of Further, m the multiplexers means for the transmission of the predetermined static m, another transmission channel in accordance with a load eingefugten Codierworter Look - method is provided - Claim 4. This causes a storunempfmdli- chere while rapid transfer of Schιcht-1-¬ infor mation, where the Schιcht-1 information represents internal information, ie information relating only to the multiplexer.
Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung ist m den Multiplexern ein f r die Übermittlung der ISDN-Signalisierungsinformationen vorgesehenes ISDN-Protokoll für die Übermittlung der betriebsspezifischen Informationen erweitert - Anspruch 5. Die ISDN-Signalisierungsmformationen sind vorteilhaft gemäß dem ISDN-orientierten D-Kanal-Protokoll gebildet - Anspruch 6. Diese Protokollerweiterung basiert auf einem vorhandenen Ubertragungsprotokoll - vorteilhaft das D-Kanal-Protokoll -, das mit geringem zusätzlichen wirtschaftlichen Aufwand erweitert und zusätzlich für die Übermittlung von betriebsspezifischen Informationen genutzt wird.According to a further advantageous embodiment of the invention, the multiplexers have an ISDN protocol provided for the transmission of the ISDN signaling information for the transmission of the company-specific information - claim 5. The ISDN signaling information is advantageous in accordance with the ISDN-oriented D-channel protocol formed - claim 6. This protocol extension is based on an existing transmission protocol - advantageously the D-channel protocol - which is expanded with little additional economic effort and is also used for the transmission of company-specific information.
In den Multiplexern sind des weiteren Mittel zum Multiplexen der Signalisierungskanale der Kommunikationsendgerate (KE) m den zumindest einen Ubertragungskanal vorgesehen - Anspruch 7. Beispielsweise werden vier ISDN-gemaße D-Kanale mit jeweils 16 kbit/s in einen vorgegebenen Ubertragungskanal ge- multiplext .The multiplexers also have means for multiplexing the signaling channels of the communication terminals (KE) in the at least one transmission channel — claim 7. For example, four ISDN-compliant D channels, each with 16 kbit / s, are multiplexed into a predetermined transmission channel.
Im folgenden wird das erfmdungsgemaße Multiplexsystem anhand zweier Zeichnung naher erläutert. Dabei zeigenThe multiplex system according to the invention is explained in more detail below with reference to two drawings. Show
Fig. 1 m einem Blockschaltbild ein erfmdungsgemaßes Multiplexsystem und Fig. 2 in einem Blockschaltbild eine die Signalisierungs- und betπe-osspezifischen Informationen betreffenden Realisierung m den Multiplexern. Fig.l zeigt ein Multiplexsystem, das durch einen Vermitt- lungssyste -seitig angeordneten Multiplexer COT und durch einen Kommumkationsendgerat-seitig angeordneten, peripheren Multiplexer RMT gebildet ist. Die beiden Multiplexer RMT, COT sind über beispielsweise eine 2048 kbit/s-Verbmdung V miteinander verbunden, wobei die Verbindung V über ein Kommunikationsnetz - beispielsweise ein Kommunikationsfestnetz - gefuhrt werden kann - in der Fig.l durch ein mit KFN bezeichne- tes Oval angedeutet.1 is a block diagram of a multiplex system according to the invention, and FIG. 2 is a block diagram of a realization relating to the signaling and betπe-specific information in the multiplexers. 1 shows a multiplex system which is formed by a multiplexer COT arranged on the switching system side and by a peripheral multiplexer RMT arranged on the communication terminal side. The two multiplexers RMT, COT are connected to one another via, for example, a 2048 kbit / s connection V, connection V being able to be made via a communication network - for example a fixed communication network - indicated in FIG. 1 by an oval labeled KFN .
An den peripheren Multiplexer RMT sind Netzabschlußeinheiten NT angeschlossen, wobei repräsentativ für mehrere anschließbare Netzabschlußeinheiten NT eine Netzabschlußeinheit NT dargestellt ist - bei mehreren Verbindungen V mit jeweils 2048 kbit/s zwischen den Multiplexern RMT, COT sind mehrere Netzabschlußeinheiten NT bzw. Kommunikationsendgerate KE an den peripheren Multiplexer RMT anschließbar . Die Netzab- schlußemheiten NT sind jeweils mit zumindest einem Kommuni- kationsendgerat KE verbunden - beispielhaft ist eines dargestellt, das an die eine dargestellte Netzabschlußeinheit NT angeschlossen ist. Für das Ausfuhrungsbeispiel sei angenommen, daß die Kommunikationsendgerate KE durch ISDN-Kommunika- tionsendgerate realisiert und über eine SO-Schnittstelle SO mit den Netzabschlußeinheiten NT verbunden sind. Die Netzab- schlußemheiten NT sind über die standardisierte, nach dem Echokompensations-Ubertragungsverfahren wirkende UKO-Schnitt- stellen an den peripheren Multiplexer RMT herangeführt. Im peripheren Multiplexer RMT ist für jede herangeführte Netzab- schlußemheit NT eine Ubertragungsemheit UK0 vorgesehen, durch die ebenfalls das Echokompensations-Ubertragungsverfahren realisiert ist. Über jede der Netzabschlußeinheiten NT werden zwei Ubertragungskanale TC mit einer Ubertragungsge- schwmdigkeit von 64 kbit/s an den peripheren Multiplexer RMT herangeführt, wobei die beiden Nachrichtenkanale TC transparent über den peripheren Multiplexer RMT und die Verbindung V über den Multiplexer COT an eine Vermittlungseinrichtung wei- tergefuhrt sind. Über diese beiden Ubertragungskanale TC wer¬ den die Nachrichten, beispielsweise eine digitalisierte - Sprachinformation übermittelt. Zusatzlich zu den beiden Uber- tragungskanalen TC wird jeweils von den Netzabschlußeinheiten NT ein Signalisierungskanal D zu dem peripheren Multiplexer RMT gefuhrt. Bei ISDN-gemaßer Realisierung weist der Signali¬ sierungskanal D eine Ubertragungsgeschwmdigkeit von 16 kbit/s auf und die ISDN-Signalisierungsmformation d wird gemäß dem standardisierten D-Kanal-Protokoll gebildet und uber- mittelt.Network termination units NT are connected to the peripheral multiplexer RMT, a network termination unit NT being represented as representative of several connectable network termination units NT - with several connections V with 2048 kbit / s each between the multiplexers RMT, COT, several network termination units NT or communication terminals KE are connected to the peripheral ones Multiplexer RMT can be connected. The network termination units NT are each connected to at least one communication terminal device KE - an example is shown which is connected to the network termination unit NT shown. For the exemplary embodiment it is assumed that the communication terminals KE are implemented by ISDN communication terminals and are connected to the network termination units NT via an SO interface SO. The network termination units NT are brought to the peripheral multiplexer RMT via the standardized UKO interfaces operating according to the echo compensation transmission method. In the peripheral multiplexer RMT, a transmission unit UK0 is provided for each network termination unit NT introduced, by means of which the echo compensation transmission method is also implemented. Via each of the network termination units NT, two transmission channels TC are brought to the peripheral multiplexer RMT at a transmission speed of 64 kbit / s, the two message channels TC being transparent to a switching device via the peripheral multiplexer RMT and the connection V via the multiplexer COT. are led. These two transmission channels TC ¬ the messages, for example, a digitized - received speech information. In addition to the two transmission channels TC, the network termination units NT each route a signaling channel D to the peripheral multiplexer RMT. For ISDN gemaßer realization of the signal I D has a ¬ sierungskanal Ubertragungsgeschwmdigkeit of 16 kbit / s and ISDN Signalisierungsmformation d is formed according to the standard D-channel protocol and uber- averages.
Erfmdungsgemaß werden Signalisierungskanale D m den beiden Multiplexern RMT, COT m zumindest einen vorgegebenen Ubertragungskanal SC. mit einer Ubertragungsgeschwmdigkeit von 64 kbit/s gemultiplext . Bei einer Ubertragungsgeschwmdigkeit von 16 kbit/s e Signalisierungkanal D werden im vorgegebenen Ubertragungskanal SC vier Signalisierungskanale D zusammengefaßt. Sind beispielsweise 12 ISDN-Basisanschlusse SO an den peripheren Multiplexer RMT angeschlossen, so sind m jede Ubertragungsrichtung drei vorgegebene Ubertragungskanale SC. erforderlich. Die paketorientierten Signalisierungsmforma- tionen d werden über die vorgegebenen Ubertragungskanale SC . transparent, d.h. unverändert übermittelt. Des weiteren können über den den Ubertragungskanalen SC. angeordneten Si- gnalisierungskanalen D zusätzlich diejenigen Informationen übertragen werden, die nicht für die Multiplexer RMT, COT selbst bestimmt sind. Dies sind beispielsweise Mamtenance- und EOC-Informationen (EOC = Embedded Operational Channel) . Vorteilhaft ist für die Übertragung dieser zusatzlichen In- formationen eoc eine Protokollerweiterung des D-Kanal-Protokolls vorgesehen, mit der zusätzlich im Signalsierungskanal D bzw. im D-Kanal Informationen übertragen werden können. Das Vorhandensein der Protokollerweiterung wird im Rahmen der - Initialisierung der Multiplexer RMT, COT beim jeweiligen Ge- gen-Multiplexer COT, RMT verifiziert und bei Vorhandensein die Protokollerweiterung aktiviert. Erf dungsgemaß ist m jeder Ubertragungsrichtung zusätzlich ein weiterer Ubertragungskanal CM - beispielsweise Ubertra¬ gungskanal 16 - ausschließlich für die Übermittlung von Schιcht-1-Informatιonen il wie Aktivierungs- und Deaktivie- rungsmformationen zwischen den beiden Multiplexern RMT, COT definiert. Derartige Schιcht-1-Informationen il stellen beispielsweise Aktivierungs- und Deaktivierungs formationen zum Schließen von Prüfschleifen im Multiplexer RMT, COT oder zum Aktivieren oder Deaktivieren von ubertragungstechnischen E - heiten oder das Anzeigen von Signalverlusten dar. Der weitere Ubertragungskanal CM ist hierbei in mehrere Subkanale strukturiert, in die zu übermittelnden Informationen statisch eingetragen sind. Beispielsweise umfaßt jeder Subkanal 4Bιt, denen 16 Codierstufen bzw. Codierworter zugeordnet werden kon- nen. Mit diesen Codierwortern können 16 unterschiedliche Informationen, beispielsweise Kommandos bzw. Indikationen übermittelt und dem jeweiligen Gegen-Multiplexer angezeigt werden. Zwei Codierworter weisen eine besondere Bedeutung auf. Das Codierwort 0000 darf nicht benutzt werden, da ansonsten Interpretationsschwierigkeiten des Rahmensynchronwortes entstehen und das Codierwort 1111 zeigt dem Gegen-Multiplexer an, daß keine Leitungsanschlußbaugruppe für das jeweilige Kommunikationsendgerat KE vorhanden bzw. gesteckt ist. Den weiteren Codierwortern werden die unterschiedlichen ISDN- Schιcht-1-Informationen il zugeordnet. Die Codierworter bzw. die Schιcht-1-Informationen il werden aus Storsicherheits- grunden mindestens dreimal übermittelt und sollen Empfangsrichtung mindestens zweimal hintereinander empfangen werden - der Fachwelt auch als "Double Last Look" bekannt -, um als gültig bewertet zu werden.According to the invention, signaling channels D m of the two multiplexers RMT, COT m are at least one predetermined transmission channel SC. multiplexed at a transmission speed of 64 kbit / s. At a transmission speed of 16 kbit / s signaling channel D, four signaling channels D are combined in the predetermined transmission channel SC. If, for example, 12 ISDN basic connections SO are connected to the peripheral multiplexer RMT, there are three predetermined transmission channels SC in each transmission direction. required. The packet-oriented signaling information d are transmitted via the predefined transmission channels SC. transparent, ie transmitted unchanged. Furthermore, the transmission channels SC. arranged signaling channels D additionally transmit the information that is not intended for the multiplexer RMT, COT itself. This includes, for example, maintenance and EOC information (EOC = Embedded Operational Channel). A protocol extension of the D-channel protocol is advantageously provided for the transmission of this additional information eoc, with which information can additionally be transmitted in the signaling channel D or in the D-channel. The presence of the protocol extension is verified as part of the initialization of the multiplexer RMT, COT at the respective counter-multiplexer COT, RMT and the protocol extension is activated if present. Erf is dungsgemaß m each transmission direction, in addition, a further transmission channel CM - for example Ubertra ¬ supply channel 16 - exclusively for the transmission of Schιcht-1-il Informatιonen as activation and deactivation rungsmformationen defined between the two multiplexers RMT, COT. Such Schιcht-1 information il represent, for example, activation and deactivation formations for closing test loops in the multiplexer RMT, COT or for activating or deactivating transmission-related units or for displaying signal losses. The further transmission channel CM is structured here into several subchannels , in which the information to be transmitted is entered statically. For example, each subchannel comprises 4Bιt, to which 16 coding levels or coding words can be assigned. With these coding words, 16 different pieces of information, for example commands or indications, can be transmitted and displayed to the respective counter-multiplexer. Two coding words have a special meaning. Coding word 0000 must not be used, as otherwise there will be difficulties in interpreting the frame sync word and coding word 1111 indicates to the counter-multiplexer that there is no line connection module for the respective communication terminal KE present or inserted. The different ISDN Schιcht-1 information il are assigned to the other coding words. The coding words or the Schιcht-1 information il are transmitted at least three times for reasons of interference safety and should be received at least twice in succession - also known to the experts as "double last look" - in order to be rated as valid.
In Fig. 2 ist m einem Blockschaltbild der Sendepfad SPF des peripheren und der Empfangspfad EPF des Multiplexer RMT, COT für die zu übermittelnden ISDN-Signalisierungsmformationen si -und die ISDN-betriebsspezifischen Informationen eoc dargestellt, wobei der Sende- und Empfangspfad SPF, EPF jeweils mit einer Schnittstellenemheit ISDNE verbunden ist. In der Schnittstellenemheit ISDNE sind für die anzuschließenden ISDN-Kommunikationsendgerate KE die ubertragungstechnischen Schnittstellen UKO realisiert. Des weiteren werden die Nachrichtenkanale - bei ISDN die B-Kanale - und die Signalisierungskanale, d.h. die D-Kanale, getrennt. Anschließend werden die m den Schnittstellenemheiten ISDNE gebildeten oder von den Kommunikationsendgeraten KE empfangenen ISDN-betnebsspe- zifischen Informationen eoc an einen Ausgang A der Schnittstellenemheiten ISDNE geleitet.2 shows a block diagram of the transmission path SPF of the peripheral and the reception path EPF of the multiplexer RMT, COT for the ISDN signaling information si to be transmitted and the ISDN operation-specific information eoc, the transmission and reception path SPF, EPF in each case is connected to an interface unit ISDNE. In the Interface unit ISDNE, the transmission-related interfaces UKO are implemented for the ISDN communication terminals KE to be connected. Furthermore, the message channels - in ISDN the B channels - and the signaling channels, ie the D channels, are separated. Subsequently, the ISDN-specific and e-specific information eoc formed by the interface units ISDNE or received by the communication terminals KE is passed to an output A of the interface units ISDNE.
Die getrennte ISDN-Signalisierungsmformation d mit einer Ubertragungsgeschwmdigkeit von 16 kbit/s wird im Sendepfad SPF des peripheren Multiplexers RMT m einem HDLC-Empfanger HD-E protokollgerecht empfangen und von diesem m einen Puf- ferspeicher PS eingeschrieben. In diesen Pufferspeicher wird ebenfalls eine am Ausgang A vorliegende ISDN-betriebsspe- zifische Information eoc eingeschrieben - m der Fig.2 durch einen mit eoc bezeichneten Pfeil angedeutet. Der folgende, nach einem erweiterten Signalisierungsprotokoll wirkende HDLC-Empfanger HD-E x liest die eingeschriebenen Informationen eoc,d aus dem Pufferspeicher PS aus und multiplext die beiden Informationen eoc,d wieder zu einem Bitstrom von 16 kbit/s. Dieser gemultiplexte Bitstrom bildet einen erweiterten Signalisierungskanal D, der m den zumindest einen vorgegebenen Ubertragungskanal SC von 64 kbit/s gemultiplext wird. Dieser vorgegebene Ubertragungskanal CS wird den Mulitplexstrom von 2048 kbit/s gemultiplext - nicht dargestellt. Im Empfangspfad EPF des Multiplexers COT werden die Signalisierungskanale D für jedes Kommunikationsendgerat KE selektiert - nicht dargestellt, durch Demultiplexen - und von einem nach einem erweiterten ISDN-Signalisierungsprotokoll wirkenden HDLC-Empfanger HD-E empfangen. In diesem werden die ISDN- Signalisierungsmformationen d und die ISDN-betriebsspezi- fiscnen Informationen eoc wieder getrennt und getrennt m ei- nen Pufferspeicher PS eingeschrieben. Aus diesem liest ISDN- gemaß ein HDLC-Empfanger HD-E die ISDN-Signalisierungsmformationen d aus und leitet sie an die betroffene Schnittstel- lene heit ISDNE, die gleichartig wie im peripheren Multiple¬ xer RMT realisiert ist, weiter. Über die Ubertragungsschnitt- stelle UKO wird der Signalsierungskanal D zusammen mit den beiden Nachrichtenkanalen B an eine nicht dargestellte Ver- mittlungsemrichtung gefuhrt. In umgekehrter Ubertragungsrichtung sind die Multiplexer RMT, COT gleichartig realisiert - m Fig.2 nicht dargestellt.The separate ISDN signaling information d with a transmission speed of 16 kbit / s is received in the transmission path SPF of the peripheral multiplexer RMT with an HDLC receiver HD-E in accordance with the protocol and is written into a buffer memory PS by this m. ISDN operating-specific information eoc present at output A is likewise written into this buffer memory - indicated in FIG. 2 by an arrow labeled eoc. The following HDLC receiver HD-E x , which operates according to an extended signaling protocol, reads the written information eoc, d from the buffer memory PS and multiplexes the two information eoc, d again to a bit stream of 16 kbit / s. This multiplexed bit stream forms an extended signaling channel D, which is multiplexed into the at least one predetermined transmission channel SC of 64 kbit / s. This predetermined transmission channel CS is multiplexed the multiplex stream of 2048 kbit / s - not shown. In the reception path EPF of the multiplexer COT, the signaling channels D are selected for each communication terminal device KE (not shown, by demultiplexing) and received by an HDLC receiver HD-E operating according to an extended ISDN signaling protocol. In this the ISDN signaling information d and the ISDN operating-specific information eoc are again separated and separately written into a buffer memory PS. From this ISDN, an HDLC receiver HD-E reads the ISDN signaling information d and forwards it to the interface concerned. The ISDNE, which is implemented in the same way as in the peripheral multiple ¬ xer RMT, continues. The signaling channel D together with the two message channels B is routed to a switching device (not shown) via the transmission interface UKO. In the reverse transmission direction, the multiplexers RMT, COT are implemented in the same way - not shown in FIG. 2.
Die Erfindung bleibt nicht auf das Ausfuhrungsbeispiel be- schrankt, sondern kann allgemein in Multiplexsystemen mit mehreren Ubertragungskanalen zwischen den Multiplexern RMT, COT eingesetzt werden, wobei für die Übermittlung der ISDN- Signalisierungsmformationen d ein erweiterbares Ubermitt- lungsprotokoll vorzusehen ist. Die ISDN-Schιcht-1-Infor atio- nen il können hierbei Abhängigkeit von den Ausgestaltungen der Schnittstellenemheiten und den damit verbundenen Aktivierungs- und Deaktivierungsvorgangen sehr unterschiedlich sein. The invention is not limited to the exemplary embodiment, but can generally be used in multiplex systems with a plurality of transmission channels between the multiplexers RMT, COT, an expandable transmission protocol being provided for the transmission of the ISDN signaling information d. Depending on the configuration of the interface units and the activation and deactivation processes associated therewith, the ISDN Schιcht-1 information il can be very different.

Claims

Patentansprüche claims
1. Multiplexsystem mit zumindest zwei Multiplexern (RMT, COT), die über mehrere Ubertragungskanale verbunden sind, wobei in den Ubertragungskanalen ISDN-Informationen, ISDN-Signalisie- rungsmformationen (d) , ISDN-Schιcht-1-Informationen (il) und ISDN-betπebsspezifIsche Informationen (eoc) von mit dem Multiplexsystem verbundenen ISDN-Ko munikationsendgeraten (KE) übertragen werden, dadurch gekennzeichnet, daß zumindest ein vorgegebener Ubertragungskanal (SC.. ) ausschließlich für die Übermittlung von ISDN-Signalisierungs - formationen (d) und ISDN-betπebsspezifischen Informationen (eoc) der Ubertragungskanale und zumindest ein weiterer vor- gegebener Ubertragungskanal (MC) ausschließlich für die Übermittlung von ISDN-Schicht -1-Informationen (il) vorgesehen ist, wobei die ISDN-Schιcht-1-Informationen (il) der Ubertragungskanale m einem statischen Modus übertragen werden.1. Multiplex system with at least two multiplexers (RMT, COT) which are connected via a number of transmission channels, ISDN information, ISDN signaling information (d), ISDN Schicht 1 information (il) and ISDN in the transmission channels. Operational information (eoc) is transmitted by ISDN communication terminals (KE) connected to the multiplex system, characterized in that at least one predetermined transmission channel (SC ..) is used exclusively for the transmission of ISDN signaling formations (d) and ISDN operational specific Information (eoc) of the transmission channels and at least one further predetermined transmission channel (MC) is provided exclusively for the transmission of ISDN layer 1 information (il), the ISDN layer 1 information (il) of the transmission channels m static mode.
2. Multiplexsystem nach Anspruch 1, dadurch gekennzeichnet, daß die ISDN-Schιcht-1-Informatιonen (il) durch Schιcht-1- Aktivierungs-Deaktivierungsmformationen, durch Schιcht-1- Schleifensteuermformationen und durch Schιcht-1-Zustands- Informationen repräsentiert sind.2. Multiplex system according to claim 1, characterized in that the ISDN Schιcht-1 information (il) are represented by Schιcht-1 activation-deactivation information, by Schιcht-1 loop control information and by Schιcht-1 status information.
3. Multiplexsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß beim statischen Modus Mittel zum Bilden von Schιcht-1- Informationen (il) repräsentierende Codierworter vorgesehen sind.3. Multiplex system according to claim 1 or 2, characterized in that in static mode means for forming Schιcht-1 information (il) representing coding words are provided.
4. Multiplexsystem nach Anspruch 3, dadurch gekennzeichnet, daß m den Multiplexern (RMT, COT) Mittel für die Übermittlung der statisch in den vorgegebenen, weiteren Ubertragungskanal (CM) eingefügten Codierwörter gemäß einem Last Look - Verfahren vorgesehen sind.4. Multiplex system according to claim 3, characterized in that m the multiplexers (RMT, COT) means for the transmission of the statically in the predetermined, further transmission channel (CM) inserted coding words are provided according to a last look method.
5. Multiplexsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in den Multiplexern (RMT, COT) ein für die Übermittlung der Signalisierungsinformationen (d) vorgesehenes ISDN- Protokoll für die Übermittlung der betriebsspezifischen Informationen (eoc) erweitert ist.5. Multiplex system according to one of the preceding claims, characterized in that in the multiplexers (RMT, COT) an ISDN protocol provided for the transmission of the signaling information (d) for the transmission of the company-specific information (eoc) is expanded.
6. Multiplexsystem nach Anspruch 5, dadurch gekennzeichnet, daß die Signalisierungsinformationen (d) gemäß dem ISDN- orientierten D-Kanal-Protokoll gebildet sind.6. Multiplex system according to claim 5, characterized in that the signaling information (d) are formed in accordance with the ISDN-oriented D-channel protocol.
7. Multiplexsystem nach einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, daß in den Multiplexern (RMT, COT) Mittel zum Multiplexen der ISDN-Signalisierungskanäle (D) der ISDN-Kommunikationsendge- rate (KE) in den zumindest einen Übertragungskanal (SC.) vorgesehen sind. 7. Multiplex system according to one of claims 5 or 6, characterized in that in the multiplexers (RMT, COT) means for multiplexing the ISDN signaling channels (D) of the ISDN communication terminal (KE) in the at least one transmission channel (SC. ) are provided.
PCT/DE2000/001179 1999-04-28 2000-04-14 Multiplex system having layer 1 transmission channels and signaling transmission channels WO2000067517A1 (en)

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US5043884A (en) * 1988-07-14 1991-08-27 Siemens Aktiengesellschaft Communications installation with communications terminal equipment provided with prescribed functions defined and controlled by a communications installation with information transmission
EP0667723A2 (en) * 1994-02-15 1995-08-16 Siemens Schweiz AG Method for the transmission of data between private branch exchanges
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