Method used in a telecommunication network, termination unit realizing the latter and a telecommunication network including such a termination unit

• US 6,694,516 B1
• Filed: 11/13/1997
• Issued: 02/17/2004
• Est. Priority Date: 11/13/1996
• Status: Expired due to Fees

• Current Assignee: Alcatel SA (Nokia Corporation)
• Original Assignee: Alcatel Alsthom Compagnie Generale d'Electricite (Nokia Corporation)
• Inventors: Vandenabeele, Peter, Beller, Dieter
• Primary Examiner(s): Faile, Andrew
• Assistant Examiner(s): BROWN, RUEBEN M
• Application Number:
  US08/970,245
• Time in Patent Office: 2,287 Days
• Field of Search: 725/131, 725/134, 725/148-151, 725/126-128, 725/63-72, 725/74-81
• US Class Current: 725/121
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications

Abstract

The method is used in a telecommunication network wherein a central station (CS) is coupled to a plurality of residences (R1,R2,R3). One of the residences (R3) includes a termination unit (TU) which is coupled to the central station (CS) via a first port (P1). The residence (R3) also includes subscriber terminals, e.g. a personal computer (PC), a telephone set (TEL), a television set (TV) and a set-top box (STB) which are coupled to the termination unit (TU) via a second port (P2). The method includes amplifying an upstream signal (US) applied to the second port (P2) with an upstream gain value (UG) by means of an upstream signal amplifier (U-AMP3) which is included in the termination unit (TU). Thereby, an amplified upstream signal (AUS) is generated and provided to the first port (P1). The upstream gain (UG) is a compensation for the signal power attenuation of the internal transmission line (UA-Li) between the termination unit (TU) and one of the subscriber terminals which is in fact the in-house network attenuation. By this way cross-talk in the region of the internal transmission line at the subscriber terminals is reduced by reducing the differences between the signal power levels.

Claims

1. A method for use in a telecommunication network wherein a central station is coupled to a plurality of residences, one of said residences including a termination unit coupled to said central station via a first port, said residence including at least one subscriber terminal coupled to said termination unit via a second port, characterized in that said method includes the steps of:

amplifying an upstream signal applied to said second port with an upstream gain value by means of an upstream signal amplifier included in said termination unit, and

generating an amplified upstream signal provided to said first port, and further characterized in that said upstream gain value is for compensating any of;

an upstream signal power attenuation of an internal transmission line coupled between said termination unit and any of said subscriber terminals; and

a downstream signal power attenuation of said internal transmission line, and still further characterized in that the upstream gain value is selected so that the at least one subscriber terminal will be in a region having a smaller difference between upstream and downstream signal power levels and a smaller difference between downstream and upstream signal power levels.

2. The method according to claim 1, characterized in that said method further includes the step of determining said upstream gain value as a function of any of an upstream signal power attenuation of an external transmission line coupled between said first port of said termination unit and said central station and a downstream signal power attenuation of said external transmission line.

3. The method according to claim 2, characterized in that said method further includes the steps of:

determining at set times the value of said upstream signal power attenuation of said external transmission line or the value of said downstream signal power attenuation of said external transmission line, respectively;

providing said value to said control unit to thereby enable said control unit to determine said upstream gain control signal.

4. The method according to claim 1, characterized in that said method further includes the step of controlling said upstream gain value by means of an upstream gain control signal provided from a control unit included in said termination unit to said upstream signal amplifier.

5. A method for use in a telecommunication network wherein a central station is coupled to a plurality of residences one of said residences including a termination unit coupled to said central station via a first port, said residence including at least one subscriber terminal coupled to said termination unit via a second port, characterized in that said method includes the steps of amplifying a downstream signal applied to said first port with a downstream gain value by means of a downstream signal amplifier included in said termination unit and generating an amplified downstream signal provided to said second port and that said downstream gain value is for compensating any of:

an upstream signal power attenuation of the internal transmission line coupled between said termination unit and any of said subscriber terminals; and

a downstream signal power attenuation of said internal transmission line, and still further characterized in that the gain value is selected so that the at least one subscriber terminal will be in a region having a smaller difference between upstream and downstream signal power levels and a smaller difference between downstream and upstream signal power levels.

6. A method according to claim 5, characterized in that said method further includes controlling said downstream gain value by means of a downstream gain control signal provided from a control unit included in said termination unit to said downstream signal amplifier.

7. A method according to claim 5, characterized in that said method further includes the step of determining said downstream gain value as a function of any of an upstream signal power attenuation of an external transmission line coupled between said first port of said termination unit and said central station and a downstream signal power attenuation of said external transmission line.

8. A method according to claim 7, characterized in that said method further includes:

determining at set times the upstream signal power attenuation of said external transmission line or the value of said downstream signal power attenuation of said external transmission line; and

providing said value to said control unit to thereby enable said control unit to determine said downstream gain control signal based thereon.

9. The method of claim 5, characterized in that said method further includes the step of controlling said downstream gain value by means of a downstream gain control signal provided from a control unit included in said termination unit to said downstream signal amplifier.

10. Termination unit for inclusion in a telecommunication network wherein a central station is coupled to a plurality of residences, one of said residences including said termination unit coupled to said central station via a first port of said termination unit, said residence including at least one subscriber terminal coupled to said termination unit via a second port, characterized in that:

said termination unit includes an upstream signal amplifier to amplify an upstream signal applied to said second port with an upstream gain value and to thereby generate an amplified upstream signal provided to said first port,

and further characterized in that said upstream gain value compensates any of;

the upstream signal power attenuation of the internal transmission line coupled between said termination unit and any of said subscriber terminals; and

the downstream signal power attenuation of said internal transmission line,

and still further characterized in that the upstream gain value is selected so that the at least one subscriber terminal will be in a region having a smaller difference between upstream and downstream signal power levels and a smaller difference between downstream and upstream signal power levels.

11. Termination unit according to claim 10, for inclusion in a telecommunication network wherein a central station is coupled to a plurality of residences, one of said residences including said termination unit coupled to said central station via a first port of said termination unit, said residence including at least one subscriber coupled to said termination unit via a second port, characterized in that said termination unit includes a downstream signal amplifier to amplify a downstream signal applied to said first port with a downstream gain value and to thereby generate an amplified downstream signal provided to said second port and that said downstream gain value compensates any of:

the upstream signal power attenuation of the internal transmission line coupled between said termination unit and any of said subscriber terminals; and

the downstream signal power attenuation of said internal transmission line.

12. A telecommunication network characterized in that said telecommunication network includes at least one termination unit as described in claim 11.

13. A telecommunication network characterized in that said telecommunication network includes at least one termination unit as described in claim 10.