EP1442572A2 - Bestimmung eines neuen training für xsdl - Google Patents
Bestimmung eines neuen training für xsdlInfo
- Publication number
- EP1442572A2 EP1442572A2 EP02781151A EP02781151A EP1442572A2 EP 1442572 A2 EP1442572 A2 EP 1442572A2 EP 02781151 A EP02781151 A EP 02781151A EP 02781151 A EP02781151 A EP 02781151A EP 1442572 A2 EP1442572 A2 EP 1442572A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- modem
- data transmission
- xdsl
- training
- new training
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000012549 training Methods 0.000 claims abstract description 48
- 238000012546 transfer Methods 0.000 claims description 11
- 230000011664 signaling Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 101150012579 ADSL gene Proteins 0.000 description 2
- 102100020775 Adenylosuccinate lyase Human genes 0.000 description 2
- 108700040193 Adenylosuccinate lyases Proteins 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000011867 re-evaluation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1438—Negotiation of transmission parameters prior to communication
- H04L5/1446—Negotiation of transmission parameters prior to communication of transmission speed
Definitions
- the invention relates to a method and a device for optimized xD ⁇ L data transmission, preferably according to standard Tl.413 or ITU G992.1, in which a training procedure for determining the largest possible data transmission rate is initiated by the occurrence of a line fault.
- the transmission is divided into three channels with regard to their used frequencies, the so-called downstream channel from the service provider to the end customer, the upstream channel from the end customer to the service provider and a channel via which the so-called splitter connects the PSTN and ISDN at the same time -Communication can take place.
- Standard specifications currently used for this type of data transmission are, for example, standards Tl.413 or ITU G992.1.
- the maximum data transmission speed is based on the individual, i.e. based on the respective current line connection, on the quality of the respective physical transmission line.
- a training procedure is carried out each time a data transmission is set up, in which the maximum possible speed of the data transmission is determined by individually measuring the line in the time and frequency domain.
- the inventors have recognized that in the currently known xDSL method after contacting the 1 modem or the xDSL network termination at the end user, which is also referred to as customer premises equipment (CPE), with the xDSL mode in office, too referred to as a central office modem (CO mode), on the physical level, the xDSL physical layer, a connection channel is established.
- CPE customer premises equipment
- CO mode central office modem
- a connection channel is established.
- a training phase is run through, during which the individual carrier signals depend on the state of the transmission channel (frequency response, interference coupling, etc.) and on the administered bandwidth (desired maximun Rate) Rn max a certain number of bits (2-15 each) are assigned, which are modulated onto the carrier using suitable methods.
- the inventors therefore propose to remedy this deficiency, which occurs in part, the method for optimized xDSL data transmission between a first modem (CO modem) and a second modem (CPE modem), preferably according to the standard Tl.413 or ITU G992.1 , in which the largest possible currently available data transmission rate RAmax is determined by a training procedure between the first and second modem in a data connection with the largest possible theoretical data transmission rate P-max, to improve that during the data transmission following a training phase at least a modem based on currently measured SNR values and derived values for the largest possible currently available data transfer rate R Amax , den
- An advantageous embodiment of the invention provides that the values of the maximum theoretical data transmission rate R TmaxD u, R rmxDD and / or the maximum available data transmission rate Ramadu, RAaxDD and / or the distance R ö i ffDU RUEI ffDD be determined individually for each transmission direction , In the given indices, the last two letters "DU” and "DD" describe the data transmission direction: "data upstream” to the CO modem, while “data downstream” to the CPE modem.
- a further embodiment of the method according to the invention provides that different threshold values are used for each direction of transmission, if exceeded, a new training is initiated.
- the first and second modem are connected via a separate signaling channel.
- Specific signal values of the connection can be exchanged with one another via this signaling channel, in particular transmitted from the CPE modem to the CO modem.
- This signaling channel can be used, for example, with the "Embedded Operations Channel” (EOC) already established in the xDSL process, which may include other message types, such as "RetrainAdjust” as a command from the CO modem to the CPE modem, "RetrainAdjust” as Reply in the sense of a confirmation from the CPE modem to the CO modem, and "RetrainingRecommended” as a message from the CPE modem to the CO modem is expanded.
- EOC embedded Operations Channel
- the data rates can be monitored on both sides, that is to say both with the CO modem and with the CPE modem, with at least one modem advantageously notifying the other modem of the need for a new training from its point of view.
- one side preferably on the CO side and again preferably through the CO modem yourself, decided - and thus ultimately controlled - whether a new training course is initiated.
- decision to conduct a new training is carried out by a separate control unit that is not located in the respective modem.
- the condition for carrying out a new training can furthermore presuppose that only one of the two modems considers a new training necessary or that both modems must consider a new training necessary.
- an xDSL link with a device for optimized xDSL data transmission preferably in accordance with standards Tl.413 or ITU G992.1, is proposed, which means, preferably program means or program Has modules for carrying out the method according to the invention.
- the inventors also propose an xDSL modem for data transmission between two sides of a data connection, which have means, preferably program means or program modules, for carrying out the method according to the invention for at least one of the two sides (CO modem or CPE modem) ,
- Figure 1 Schematic representation of an ADSL connection
- Figure 2 Time diagram of an xDSL modem training during a phase with strong channel interference
- Figure 3 Time diagram of the compensation of the data rate loss by an inventive xDSL modem retraining.
- FIG. 2 shows the typical situation of establishing an xDSL connection with a time diagram.
- the training phase T is carried out, which is overlaid by a fault N. Due to the existing interference, the maximum possible data rate RAma is set relatively low. After the end of the time window of the disturbance N, a higher data rate, as shown in the broken line R ⁇ ma X , would theoretically be possible. However, since no mechanism for a new training is initialized, the data rate R Amax actually used remains at the previously set level, so that there is a large difference R D i ff between the theoretically possible data transfer rate RTmax and the set data rate R Ama ,
- FIG. 3 shows the same situation as in FIG. 2, however, due to the constant checking of the distance between the theoretically maximum possible data rate R ⁇ ma X and the set maximum data rate RAax according to the invention, shortly after the break-up between the theoretical maximum Data rate R ⁇ maX and the maximum data rate R Amax used, a new training phase T ⁇ is initiated, on the basis of which the used maximum data rate RAmax is adapted to the theoretically maximum data rate R ⁇ ax.
- a signaling channel it can be advantageous for a signaling channel to be set up between the CPE modem and CO modem shown in FIG. 1, with the information about the need for a new one being provided via this signaling channel Training can take place.
- both the CPE modem and the CO modem can derive the information from the SNR analysis that is carried out as part of the xDSL procedure for the calculation for bit redistribution (bit swap)
- Data rate R ⁇ max is theoretically possible for the two data transmission directions based on the determined SNR value per carrier.
- bit swapping method is used to determine the SNR value per carrier, and this value is converted into a bit load value using the computing methods also presented in the publications mentioned above, which indicates how many bits each per
- Carrier can be modulated, converted.
- the sum of all bitload values multiplied by the symbol rate of 4 kbaud results in the achievable data rate in kbit / s.
- program modules or objects can be integrated in the individual modems, for example, which are responsible for monitoring and evaluating the SNR analysis and can initiate new training.
- program modules or objects can be integrated in the individual modems, for example, which are responsible for monitoring and evaluating the SNR analysis and can initiate new training.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Communication Control (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001154935 DE10154935A1 (de) | 2001-11-08 | 2001-11-08 | Verfahren und Vorrichtung zur optimierten xDSL-Datenübertragung |
| DE10154935 | 2001-11-08 | ||
| PCT/DE2002/004089 WO2003041353A2 (de) | 2001-11-08 | 2002-11-04 | Bestimmung eines neuen training für xsdl |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1442572A2 true EP1442572A2 (de) | 2004-08-04 |
Family
ID=7705089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02781151A Withdrawn EP1442572A2 (de) | 2001-11-08 | 2002-11-04 | Bestimmung eines neuen training für xsdl |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1442572A2 (de) |
| CN (1) | CN100481825C (de) |
| AU (1) | AU2002349284A1 (de) |
| DE (1) | DE10154935A1 (de) |
| WO (1) | WO2003041353A2 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7352696B2 (en) * | 2003-08-08 | 2008-04-01 | Intel Corporation | Method and apparatus to select an adaptation technique in a wireless network |
| JP2005333479A (ja) * | 2004-05-20 | 2005-12-02 | Mitsumi Electric Co Ltd | Adsl通信方法及びadsl通信装置及びadsl通信プログラム |
| DE102005006890B4 (de) * | 2005-02-15 | 2007-04-26 | Siemens Ag | Verfahren zur Bestimmung einer optimalen Datenübertragungsrate über ein Übertragungsmedium |
| EP1865647B1 (de) * | 2006-06-09 | 2008-07-30 | Alcatel Lucent | Anwendungsbezogene Resynchronisierungseinrichtung und ein dazugehöriges Verfahren |
| US10205483B2 (en) * | 2014-03-03 | 2019-02-12 | Lantiq Beteiligungs-GmbH & Co. KG | Line simulator |
| CN105391748B (zh) * | 2014-09-04 | 2019-03-15 | 瑞昱半导体股份有限公司 | 网络连接建立方法与电路 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5479447A (en) * | 1993-05-03 | 1995-12-26 | The Board Of Trustees Of The Leland Stanford, Junior University | Method and apparatus for adaptive, variable bandwidth, high-speed data transmission of a multicarrier signal over digital subscriber lines |
| US6072779A (en) * | 1997-06-12 | 2000-06-06 | Aware, Inc. | Adaptive allocation for variable bandwidth multicarrier communication |
| US6005893A (en) * | 1997-09-23 | 1999-12-21 | Telefonaktiebolaget Lm Ericsson | Reduced complexity bit allocation to subchannels in a multi-carrier, high speed data transmission system |
| US6101216A (en) * | 1997-10-03 | 2000-08-08 | Rockwell International Corporation | Splitterless digital subscriber line communication system |
| US6278728B1 (en) * | 1998-03-18 | 2001-08-21 | Cisco Technology, Inc. | Remote XDSL transceiver unit and method of operation |
| US6246754B1 (en) * | 1998-06-09 | 2001-06-12 | Legerity, Inc. | Mechanism for changing a modem's connection rate within a family of interoperable modems |
| DE10001153A1 (de) * | 2000-01-13 | 2001-07-19 | Siemens Ag | Verfahren zur adaptiven Erstellung einer leitungs- und störangepaßten Tabelle von Datenratenoptionen für xDSL-Datenübertragungsverfahren |
| DE10001150A1 (de) * | 2000-01-13 | 2001-07-19 | Siemens Ag | Adaptive Anpassung der Datenübertragungsparameter bei xDSL-Verfahren zur Verringerung von Übertragungsfehlern bei der Datenübertragung |
-
2001
- 2001-11-08 DE DE2001154935 patent/DE10154935A1/de not_active Withdrawn
-
2002
- 2002-11-04 EP EP02781151A patent/EP1442572A2/de not_active Withdrawn
- 2002-11-04 AU AU2002349284A patent/AU2002349284A1/en not_active Abandoned
- 2002-11-04 CN CNB028268377A patent/CN100481825C/zh not_active Expired - Fee Related
- 2002-11-04 WO PCT/DE2002/004089 patent/WO2003041353A2/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO03041353A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10154935A1 (de) | 2003-05-22 |
| AU2002349284A1 (en) | 2003-05-19 |
| WO2003041353A2 (de) | 2003-05-15 |
| WO2003041353A3 (de) | 2003-08-14 |
| CN100481825C (zh) | 2009-04-22 |
| CN1613238A (zh) | 2005-05-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20040528 |
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| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
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| AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS S.P.A. |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SOLUTIONS AND NETWORKS GMBH & CO. KG |
|
| 17Q | First examination report despatched |
Effective date: 20161122 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20180605 |
|
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: H04L 27/26 20060101AFI20030520BHEP |