WO1998019495A1 - Verfahren für die signalübertragung in einem netz - Google Patents
Verfahren für die signalübertragung in einem netz Download PDFInfo
- Publication number
- WO1998019495A1 WO1998019495A1 PCT/DE1997/002317 DE9702317W WO9819495A1 WO 1998019495 A1 WO1998019495 A1 WO 1998019495A1 DE 9702317 W DE9702317 W DE 9702317W WO 9819495 A1 WO9819495 A1 WO 9819495A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- onu
- data
- multipoint
- stations
- frame
- Prior art date
Links
Classifications
-
- 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
- H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers
-
- 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
- H04Q11/0478—Provisions for broadband connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
-
- 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
- H04L2012/5609—Topology
- H04L2012/561—Star, e.g. cross-connect, concentrator, subscriber group equipment, remote electronics
-
- 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
- H04L2012/5625—Operations, administration and maintenance [OAM]
Definitions
- the invention is based on the genus as specified in independent / claim 1. Corresponding methods are described in the Journal of Lightwave Technology, Vol. 13, No. 5, May 1995, pp. 947 to 953 and in Access to B-ISDN via PONs-ATM Communication in Practice, edited by U. Killat, iley / Teubner, 1996, pages 177ff.
- a head-end station e.g. OLT, Optical Line Termination
- a point-to-multipoint connection is selected (FIG. 2), then a TDM / TDMA method (time division multiplex / time division) is used as the access method of the individual stations to the transmission medium Multiple access).
- TDM / TDMA method time division multiplex / time division
- TDM-S Downward direction
- a TDM signal (TDM-S) is transmitted, which is received by all ONUs.
- Splitter (3) which are passive elements, are provided for distribution.
- the ONUs send their data burst-like as a TDMA signal (TDMA-S).
- the individual data bursts are combined via one or more splitters (3) to form the TDMA signal received by the OLT.
- Guard and run-in bits precede each data burst.
- the guard bits prevent two data bursts from overlapping.
- the run-in bursts are used for synchronization in the receiver of the OLT.
- each ONU Since the distance between an ONU and OLT is unknown, each ONU must be measured during commissioning or a check. If this calibration procedure (ONU sends calibration burst) is to be implemented within the available data transmission frames, an area must be reserved for this in which no data is transmitted. This area is called the measurement window (see reference number 4 in FIG. 2). Advantage of this procedure: no additional transmission technology required. Disadvantage of this method: transmission capacity must be sacrificed.
- the measuring window is superfluous, i.e. now data could be transferred there. However, since the measuring window must be available again for a certain period at any time (new ONU must be commissioned or checked), only asynchronous data can be transmitted in the area of the measuring window.
- Figure 1 the structure of the frame for the TDM and the TDMA signal
- FIG. 2 an illustration of the process sequence in a conventional distribution network
- Figure 3 the process flow according to the invention.
- FIG. 2 shows a head-end station OLT, which is connected via a distribution network with a splitter 3 to multipoint stations ONU_l, ONU_2, ... ONU_n.
- the frame in which the TDM signals TDM-S are transmitted to the multipoint stations is shown above the head-end station OLT.
- the frame begins with a so-called overhead OH, the sections for the different Multipoint stations follow, these sections having the same names as the associated multipoint stations for which these sections are intended. Above the multipoint stations, the same frame is again shown, from which the multipoint stations extract the signal sections intended for them.
- the multipoint stations transmit the signals shown below them, which are combined by the splitter 3 to form a frame of TDMA signals TDMA-S, as is shown below the head-end station OLT.
- This frame contains a measuring window 4.
- the TDM frame 5 shown in FIG. 1 with overhead 6 and user data 7 or TDMA frame 8 with TDMA bursts (user data) 9 is divided into areas for the transmission of synchronous data SD and asynchronous data AD.
- TDMA frame 8 can between measurement window 4 and transmission of asynchronous
- the space required for the guard and run-in bits in the TDMA frame 8 is available for the overhead 6 in the TDM frame. Therefore, the size of the areas in the TDM or TDMA frame is different in FIG.
- FIG. 3 corresponds essentially to Figure 2.
- a special feature is that in the frame, which is shown above the head-end station OLT, behind the overhead OH both asynchronous data AD and synchronous Data SD are transmitted.
- the multipoint station ONU_l receives only asynchronous data AD from this frame.
- the multipoint station 0NU_2 receives both asynchronous data AD and synchronous data SD.
- the multipoint station ONU_n only receives synchronous data SD.
- the multipoint stations which are suitable for asynchronous data transmission, send data bursts with asynchronous data in the area of the measurement window.
- the classification of the synchronous data SD and the asynchronous data AD in the different areas of the frame is realized by the different transmission times for the different bursts.
- the asynchronous user data AD are inserted into this area whenever the area of the measuring window 4 is not required. Measurement data to be transmitted in the measurement window 4 are requested once by the OLT when an ONU is started up or cyclically during later checks.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97945731A EP0935908A1 (de) | 1996-10-31 | 1997-10-10 | Verfahren für die signalübertragung in einem netz |
AU51153/98A AU5115398A (en) | 1996-10-31 | 1997-10-10 | Method for transmitting signals in a network |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19643970.1 | 1996-10-31 | ||
DE1996143970 DE19643970A1 (de) | 1996-10-31 | 1996-10-31 | Verfahren für die Signalübertragung in einem Netz |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998019495A1 true WO1998019495A1 (de) | 1998-05-07 |
Family
ID=7809708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1997/002317 WO1998019495A1 (de) | 1996-10-31 | 1997-10-10 | Verfahren für die signalübertragung in einem netz |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0935908A1 (de) |
AU (1) | AU5115398A (de) |
DE (1) | DE19643970A1 (de) |
ID (1) | ID18690A (de) |
WO (1) | WO1998019495A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19914324C1 (de) * | 1999-03-30 | 2001-01-11 | Iad Gmbh | Kommunikationssystem zur Datenübertragung in einem vermaschten Netzwerk unter Verwendung eines Verfahrens mit Muliträgerübertragung |
DE10301556B4 (de) * | 2003-01-16 | 2012-03-01 | IAD Gesellschaft für Informatik, Automatisierung und Datenverarbeitung mbH | Verfahren zur Gleichwellenübertragung und Gleichwellenfunksystem oder drahtgebundenes Gleichwellenübertragungssystem mit räumlich verteilt angeordneten Gleichwellensendern |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0337619A1 (de) * | 1988-03-24 | 1989-10-18 | BRITISH TELECOMMUNICATIONS public limited company | Kommunikationssystem |
EP0713347A2 (de) * | 1994-11-17 | 1996-05-22 | AT&T Corp. | Methode und Apparat zum Ermöglichen von STM und Paketmoduszugang auf einem Breitbandkommunikationsnetzwerk |
-
1996
- 1996-10-31 DE DE1996143970 patent/DE19643970A1/de not_active Withdrawn
-
1997
- 1997-10-10 EP EP97945731A patent/EP0935908A1/de not_active Withdrawn
- 1997-10-10 AU AU51153/98A patent/AU5115398A/en not_active Abandoned
- 1997-10-10 WO PCT/DE1997/002317 patent/WO1998019495A1/de not_active Application Discontinuation
- 1997-10-30 ID IDP973553A patent/ID18690A/id unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0337619A1 (de) * | 1988-03-24 | 1989-10-18 | BRITISH TELECOMMUNICATIONS public limited company | Kommunikationssystem |
EP0713347A2 (de) * | 1994-11-17 | 1996-05-22 | AT&T Corp. | Methode und Apparat zum Ermöglichen von STM und Paketmoduszugang auf einem Breitbandkommunikationsnetzwerk |
Non-Patent Citations (1)
Title |
---|
PLAS G VAN DER ET AL: "ATM OVER PASSIVE OPTICAL NETWORKS: SYSTEM DESIGN AND DEMONSTRATION", FIBER NETWORKS FOR VOICE, VIDEO & MULTIMEDIA SERVICES PROCEEDINGS, 19 NOVEMBER 1992, BOSTON, MA, vol. 1786, 1 January 1992 (1992-01-01), pages 48 - 57, XP000443958 * |
Also Published As
Publication number | Publication date |
---|---|
DE19643970A1 (de) | 1998-05-07 |
ID18690A (id) | 1998-04-30 |
EP0935908A1 (de) | 1999-08-18 |
AU5115398A (en) | 1998-05-22 |
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