EP1104622A2 - Method for optimizing the transmission properties and the power loss of a high-voltage part which is integrated in a subscriber connection circuit for connecting a subscriber connection line - Google Patents

Method for optimizing the transmission properties and the power loss of a high-voltage part which is integrated in a subscriber connection circuit for connecting a subscriber connection line

Info

Publication number
EP1104622A2
EP1104622A2 EP19990952365 EP99952365A EP1104622A2 EP 1104622 A2 EP1104622 A2 EP 1104622A2 EP 19990952365 EP19990952365 EP 19990952365 EP 99952365 A EP99952365 A EP 99952365A EP 1104622 A2 EP1104622 A2 EP 1104622A2
Authority
EP
European Patent Office
Prior art keywords
high
voltage part
data signals
voltage
signals
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Withdrawn
Application number
EP19990952365
Other languages
German (de)
French (fr)
Inventor
Paul Kunisch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks Italia SpA
Original Assignee
Siemens AG
Nokia Solutions and Networks GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE19836958 priority Critical
Priority to DE19836958 priority
Application filed by Siemens AG, Nokia Solutions and Networks GmbH and Co KG filed Critical Siemens AG
Priority to PCT/DE1999/002513 priority patent/WO2000010308A2/en
Publication of EP1104622A2 publication Critical patent/EP1104622A2/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems adapted for combination with other electrical systems
    • H04M11/06Simultaneous speech and telegraphic or other data transmission over the same conductors
    • H04M11/062Simultaneous speech and telegraphic or other data transmission over the same conductors using different frequency bands for speech and other data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/10Current supply arrangements

Abstract

During an XDSL data transmission in a high-voltage part (HV) integrated in a subscriber connection circuit, the current sources (SQ) which are integrated in the high-voltage part and which supply the physical units with current are adjusted to current values. The physical units are located in the high-voltage part and are provided for amplifying (V) or measuring (S) telephone signals and/or data signals located above the frequency band provided for speech. The current sources are, at the latest, set when digital signals of the aforementioned type are received in the high-voltage part. Said current values deviate upward with regard to the current values during the exclusive transmission of telephone signals located within the speech band provided for speech. These current values deviate in such a way that the data signals are transmitted with a higher bandwidth inside the high-voltage part and, for the most part, without distortions, and the power loss of the high-voltage part is optimized.

Description

description

A method for optimizing the transmission characteristics and the power dissipation of an integrated in a subscriber line circuit for connecting a subscriber line high-voltage part

The invention relates to a method for optimizing the transmission characteristics and the power dissipation of an integrated in a subscriber line high-voltage part within a digital telephone exchange according to the preamble of claim 1.

Accordingly An integrated into a subscriber line circuit high-voltage section for the connection of a subscriber line is involved in the form of a two-wire copper line caused on the adjacent to within an intended for voice frequency band telephone signals, for example, by voice, fax or modem applications also transfer data signals, for example for multimedia services are, the frequency band is above the envisaged for voice frequency band. In this case, such herkommenden of the subscriber line circuit, data signals are hochratig transmitted (for example, 1.5 Mbit / s, 2 Mbit / s or 6 Mbit / s) within a broad-band transmission channel, whereas those data signals are usually transmitted with a low data rate in the direction of the subscriber line circuit ,

Such an increase in bandwidth of such Teilnehme- ranschlußleitungen in the form of a two-wire copper cables is the so-called XDSL (Digital Subscriber Line), a novel high-speed transmission method for schwindigkeitsdatenübertragung above the ordinary two-wire copper conductors of a telephone network, enables. In order to prevent mutual interference between analogue telephone signals and the xDSL data signals to prevent the latter occupy a frequency band that is above the envisaged for voice frequency quenzbandes, said standing for XDSL data transmission for grouting frequency band, for example up to 552 kHz or 1, 1 MHz ranges.

In connection with the establishment of Internet Zugangen for Teilnehmerendemrichtungen of participants of the conventional telephone network, the XDSL technology is gaining increasing importance.

For the XDSL method m exchange side of a subscriber line circuit means for separating and bringing to the telephone signals and data signals, and means for an m this context-applied modulation method (for example, DMT, CAP, QAM) are available.

In such a subscriber line interface circuit further includes a high-voltage section is integrated m the m direction to the subscriber line circuit in addition to the already mentioned conventional telephone signals, the m are amplified a lying above the designated for voice frequency band hochratig communicable with XDSL art data signals and fed to the subscriber line. In the opposite direction the telephone signals and m are one lying above the designated for voice frequency band transmitted with XDSL art data signals for the purpose of a subsequent A / D andlung measured.

In an XDSL data transmission within such a high-voltage portion of the lying inside this high frequency band analog data signals have strong nichtlmeare distortions m its oscillation curve through the zero point, which is especially disadvantageous effect on the bandwidth and processing, for example, m the form of an A / D conversion and de- coding affect the data signals.

The object of the invention is to provide a method of the type indicated in the preamble of claim 1. DA going round to design that the data signals located above the designated for voice frequency band are transmitted in such a high-voltage section as possible without distortion and with the highest possible bandwidth and at the same time power dissipation of the high-voltage part is optimized.

This object is achieved by the features specified in the characterizing part of claim 1. Another embodiment of the invention is characterized in a dependent claim.

According to the invention, an optimization of the transmission characteristics of such a high-voltage part is achieved by the fact that in the high voltage section integrated power sources existing in the high voltage part assemblies for enhancing or measurement of Te lefon- or provide data signals with power, at the latest upon the arrival of such data signals to the high-voltage section to such current values be set that the data signals are transmitted substantially without distortion at high bandwidth within the high-voltage part. The einzu- alternate forming current values ​​are above the current values ​​in the exclusive transmission of lying within the designated frequency band for voice telephony signals.

Using the method, the high-voltage part is thus displaced without additional hardware expenses in an ideal for XDSL data transmission state in which avoided the occurrence of distortions in the zero point of the vibration waveform of such data signals and the bandwidth is increased and the power dissipation of the high voltage is partly optimal.

An advantageous embodiment of the invention provides that, if neither data signals or telephone signals are transmitted in the high voltage supply, such power sources present in the high-voltage section units provide only necessary for its quiescent operating current, respectively. This is the high-voltage part placed in a so-called resting state with minimal Ver ¬ power loss.

Hereinafter, an embodiment of the invention will be explained referring to a drawing in more detail.

The figure shows an integral in a subscriber line circuit for connecting a subscriber line TL HV high-voltage section with a downstream A / D conversion unit C including their control unit ST.

In the high-voltage part of a subscriber line TL in the form of a two-wire copper line a, b opens. In the high voltage part of one connection run from the core a of the copper line and the wire b of the copper line to a current

/ Voltage sensor S. From there, the two connections to the A / D conversion unit C to be continued.

In the opposite direction two connections leading from the A / D conversion unit in each lying in the high voltage part assemblies with Vestärkungsfunktion. These units with gain function are indicated in the figure by the amplifier V switched in parallel or in series resistors W. The path of the above-mentioned compounds eventually ends up in the veins of a, b at the output of the high-voltage part.

has the A / D conversion unit, the function of the high-voltage section herkommenden analog telephone or data signals in di- gitale telephone or data signals and to convert these telephone or data signals each separated on an intended for telephone signals outgoing line and one for data signals dissipate vorgehenen outgoing line.

In the reverse direction meet in the A / D conversion unit via separate lines, a digital telephone signals or data signals are converted into analog telephone and data signals, and transmitted in direction to the amplifiers. In the A / D conversion unit, a control unit ST is integrated, radiating from the lines for control signals, leading away on the one hand by the A / D conversion unit, and on the other hand in an integrated in the high-voltage part of control logic STL open. The control logic is connected to inte grated ¬ in the high-voltage part of the current sources, which are indicated in the figure with SQ, and makes an adjustment of the power sources. From the current sources each lead a line to each one of the amplifiers and a line V to the current / voltage sensor S, of which the current sources supplying the amplifier and the current / voltage sensor with power.

In an XDSL data transmission data signals taken by the wires a b into the current / voltage sensor S a, in which are determined the current and voltage amplitude values. From there, the data signals enter the A / D conversion unit C, which performs the A / D conversion of analog data signals and issues the obtained from the A / D conversion digital data signals to the outgoing lines for data signals. The integrated into the A / D conversion unit control unit registers that the incoming signals in the A / D conversion unit, and reports this to the control logic of the high-voltage part. The control logic then sets a current sources to the ideal for the XDSL data transmission power values ​​and operating points, which is above the current values ​​in the exclusive transmission of telephone signals. Characterized in that the current / voltage sensor is supplied with a higher current value of the voltage sources, the over- tragungsfunktion changes in the current / voltage sensor, thereby allowing virtually no non-linear distortion in the data signals occur.

Alternatively, it is possible that before the XDSL data signals are transmitted from the outside, a so-called Wa ke-up signal (wake-up signal) is sent in direction of the high voltage part, which passes through the wires a, b to the high-voltage section. From the high voltage part of the wake-up signal is transmitted m the A / D-Wandlungsemheit, m which the control unit ¬ the wake-up signal to be registered and reports this to the control logic. Accordingly, the current sources by the control logic to the ideal for forthcoming yet XDSL data transmission power values ​​and operating points to be set. In this way, the high-voltage part can be treated with optimal power dissipation in the ideal of the XDSL data transmission mode before the start of XDSL data transmission.

In the opposite direction digital telephone and data signals take over their lines m an A / D Wandlungsemheit. There, the D / A conversion of the telephone and data signals. The resulting analog telephone or data signals are discontinued m towards the high-voltage section. In the high voltage part of the telephone and data signals are amplified by the amplifier and fed to the wires a, b.

Before an XDSL data transmission is initiated, the control unit m of the A / D-Wandlungsemheit monitors the incoming lines for data signals to incoming digital data signals or, optionally, a wake-up signal. The arrival of such data signals or the wake-up signal is reported to the control logic which adjusts, in turn, the current sources beitspunkte to the ideal for the XDSL data transmission power values ​​and work, whereby the high-voltage section m the ideal for the XDSL data transmission mode with optimum dissipation is added. The relation to the current values ​​increased with exclusive transmission of telephone signals current values ​​of the current sources affect the Nichtlmeari- did and the bandwidth of the amplifier from. Thus, the resulting distortion by amplifying m can avoid the data signals and the bandwidth to be increased

If the XDSL data transmission is complete, that is, when data signals nor arrive from the high-voltage section forth across the lines for data signals to the A / D conversion unit, that fact is recorded by the controller and passed on a message to the control logic. The control logic sets the current values ​​of the current source back accordingly. The adjustment of the current values ​​depends on whether or telephone signals are transmitted or not. In the event that only phone signals are transmitted, the current values ​​are adjusted so that the high-voltage section is set in a range suitable for pure telephone signal transmission state. exceeded even if no telephone or data signals are transmitted, the high-voltage section passes by setting necessary for hibernation present in the high-voltage section units current values ​​into a sleep mode with minimal power loss.

Claims

Patentanspr├╝che
1. A method for optimization of transmission characteristics, and the power loss of a circuit for a Teilnehmeranschlu├ƒ- Anschlu├ƒ a Teilnehmeranschlu├ƒleitung (TL) integrated high-voltage part (HV) within a digital telephone exchange, where m is in the high voltage part toward the next Teilnehmeranschlu├ƒleitung lying within a frequency band f├╝r language provided Telefonsi- gnalen also a m above the f├╝r language designated frequency band lying hochratig ├╝bertragbare data signals are verst├ñrkt and fed to the Teilnehmeranschlu├ƒleitung and wherein herkommende of the Teilnehmeranschlu├ƒleitung lying within the f├╝r language designated frequency band telephone signals and lying in a language f├╝r above the intended frequency band data signals are measured for the purpose of further processing, characterized in da├ƒ m the high-voltage section integrated Stromqu Ellen (SQ) which supply the high voltage present in the part units to Verst├ñrkung (V) or Mes ┬¼ solution (S) of such telephone and / or data signals with power, sp├ñtestens the arrival of such data signals m the high-voltage section on current values ​​are set, the telephone signals lying gegen├╝ber the current values ​​at ausschlie├ƒlicher ├ £ transfer of provided within the frequency band f├╝r language deviate upward so da├ƒ the DA tensignale within the high-voltage part substantially without distortion with high bandwidth ├╝bertragen and the power loss of the high-voltage part is optimized.
2. The method according to claim 1, characterized in daß then if neither data signals or telephone signals are übertragen in the high voltage part, such power sources which supply the high-voltage part NEN existing units with only a necessary für its quiescent operating current.
EP19990952365 1998-08-14 1999-08-11 Method for optimizing the transmission properties and the power loss of a high-voltage part which is integrated in a subscriber connection circuit for connecting a subscriber connection line Withdrawn EP1104622A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19836958 1998-08-14
DE19836958 1998-08-14
PCT/DE1999/002513 WO2000010308A2 (en) 1998-08-14 1999-08-11 Method for optimizing the transmission properties and the power loss of a high-voltage part which is integrated in a subscriber connection circuit for connecting a subscriber connection line

Publications (1)

Publication Number Publication Date
EP1104622A2 true EP1104622A2 (en) 2001-06-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990952365 Withdrawn EP1104622A2 (en) 1998-08-14 1999-08-11 Method for optimizing the transmission properties and the power loss of a high-voltage part which is integrated in a subscriber connection circuit for connecting a subscriber connection line

Country Status (3)

Country Link
US (1) US6965670B1 (en)
EP (1) EP1104622A2 (en)
WO (1) WO2000010308A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10119793A1 (en) * 2001-04-23 2002-10-31 Siemens Ag Method and circuit arrangement for impedance matching of an analog telecommunication connection
DE10154936A1 (en) * 2001-11-08 2003-05-28 Siemens Ag Circuit arrangement for reducing the power loss in data operation of broadband SLICs for integrated voice and data transmission (xDSL)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1587067A (en) 1976-07-27 1981-03-25 Horstmann Gear Group Ltd Level control systems
DE3433900C2 (en) 1984-09-14 1989-01-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
TW407415B (en) * 1997-12-24 2000-10-01 Globespan Semiconductor Inc Apparatus and method for improved dsl communication cross-reference to related applicattons

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0010308A2 *

Also Published As

Publication number Publication date
WO2000010308A3 (en) 2000-05-18
US6965670B1 (en) 2005-11-15
WO2000010308A2 (en) 2000-02-24

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