Implementation of smart DSL for LDSL systems
AssigneeBrooktree Broadband Holding, Inc.
InventorsPatrick Duvaut, Ehud Langberg, Lujing Cai, Laurent Pierrugues, William Scholtz, Oliver Moreno, Feng Ouyang, Massimo Sorbara
Life of this patent
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Abstract
Various embodiments for addressing the performance objectives of LDSL and examples of smart systems for LDSL are disclosed. An evaluation of the spectral compatibility of two LDSL modes based on two different downstream masks, identified herein as LDSL Wide and Narrow, is disclosed. Spectral compatibility is evaluated in accordance with existing rules. Other embodiments may further comprise determining features of upstream transmission.
Claims7
A method for implementing smart Digital Subscriber Line (DSL) for Long reach Digital Subscriber Line (LDSL) systems, the method comprising:
- defining a candidate system to be implemented by an LDSL system, wherein defining a candidate system comprises defining a number of power spectral density (PSD) masks;
- optimizing criteria associated with the candidate system to create an optimized candidate system;
- selecting the optimized candidate system to implement in an LDSL system;
- wherein,
- one of the number of masks is defined by the following relations, wherein f is a frequency band in kHz and D is the value of the mask in dBm/Hz:
- for 0<f≦4, then D=−97.5, with max power in the in 0−4 kHz band of +15 dBrn;
- for 4<f≦5, then D=−92.5+18.64 log 2(f/4);
- for 5<f≦5.25, then D=−86.5;
- for 5.25<f≦16, then D=−86.5+15.25 log 2(f/5.25);
- for 16<f≦32, then D=−62+25.5 log 2(f/16);
- for 32<f≦138, then D=−36.5;
- for 138<f≦323.4375, then D=−31.8;
- for 323.4375<f≦517.5, then D=−31.8−0.0371×(f−323.4375);
- for 258.75<f≦1800, then D=max(−39−23.27×log2 (f/517.5),−65);
- for 1800<f≦2290, then D=−65−72×log2 (f/1800);
- for 2290<f≦3093, then D=−90;
- for 3093<f≦4545, then D=−90 peak, with max power in the [f,f+1 MHz] window of (−36.5−36×log2 (f/1104)+60) dBm;
- and
- for 4545<f≦11040, then D=−90 peak, with max power in the [f,f+1 MHz] window of −50 dBm.
A method for implementing smart Digital Subscriber Line (DSL) for Long reach Digital Subscriber Line (LDSL) systems, the method comprising:
- defining a candidate system to be implemented by an LDSL system, wherein defining a candidate system comprises defining a number of power spectral density (PSO) masks;
- optimizing criteria associated with the candidate system to create an optimized candidate system;
- selecting the optimized candidate system to implement in an LDSL system;
- wherein,
- one of the number of masks is defined by the following relations, wherein f is a frequency band in kHz and M is the value of the mask in dBm/Hz:
- for 0<f<4, then M=−97.5;
- for 4<f<80, then M=−92.5+4.63 log2(f/4);
- for 80<f<138, then M=−72.5+36 log2(f/80);
- for 138<f<1104, then M=−37.9;
- for 1104<f<1622, then M=−37.9-15.5 log2(f/1104);
- for 1622<f<3750, then M=−46.5-2.9 log2(f/1622);
- for f=3750, then M=−76.5;
- for f=3925, them M=−101.5;
- and for f>3925, then M=−101.5.
A method for implementing smart Digital Subscriber Line (DSL) for Long reach pigital Subscriber Line (LDSL) systems, the method comprising:
- defining a candidate system to be implemented by an LDSL system, wherein defining a candidate system comprises defining a number of power spectral density (PSO) masks;
- optimizing criteria associated with the candidate system to create an optimized candidate system;
- selecting the optimized candidate system to implement in an LDSL system;
- wherein,
- one of the number of masks is defined by the following relations, wherein f is a frequency band in kHz and D is the value of the mask in dBm/Hz:
- for 0<f<4, then D=−97.5;
- for 4<f<25.875, then D=−92.5+21 log2(f/4);
- for 25.875<f<1104, then D=−38.3;
- for 1104<f<1622, then D=−38.3-14.75 log2(f/1104);
- for 1622<f<3750;
- then D=−46.5-2.9 log2(f/1622);
- for f=3750, then D=−76.5;
- and for f>3925, then D=−101.5.
A method for implementing smart pigital Subscriber Line (DSL) for Long reach Digital Subscriber Line (LDSL) systems, the method comprising:
- defining a candidate system to be implemented by an LDSL system, wherein defining a candidate system comprises defining a number of power spectral density (PSD) masks;
- optimizing criteria associated with the candidate system to create an optimized candidate system;
- selecting the optimized candidate system to implement in an LDSL system;
- wherein,
- one of the number of masks is defined by the following relations, wherein f is a frequency band in kHz and U is the value of the mask in dBm/Hz:
- for 0<f<4, then U=−97.5;
- for 4<f<25.875, then U=−92.5+21.5 log2(f/4);
- for 25.875<f<138, then U=−34.5;
- for 138<f<276, then U=−34.5-26 log2(f/138);
- for 276<f<f_int, then U=−60.5-95 log2(f/276);
- and
- for f_int<f<686, then U=10 log10(0.05683*f^(1.5)).
A method for implementing smart Digital Subscriber Line (DSL) for Long reach Digital Subscriber Line (LDSL) systems, the method comprising:
- defining a candidate system to be implemented by an LDSL system, wherein defining a candidate system comprises defining a number of power spectral density (PSO) masks;
- optimizing criteria associated with the candidate system to create an optimized candidate systeml;
- selecting the optimized candidate system to implement in an LDSL system;
- wherein,
- one of the number of masks is defined by the following relations, wherein f is a frequency band in kHz and M is the value of the mask in dBm/Hz:
- for 0<f<4, then M=−97.5;
- for 4<f<80, then M=−92.5+4.63 log2(f/4);
- for 80<f<138, then M=−72.5+36 log2(f/80);
- for 138<f<1104, then M=−37.9;
- for 1104<f<1622, then M=−37.9-15.5 log2(f/1104);
- for 1622<f<3750, then M=−46.5-2.9 log2(f/1622);
- for f=3750;
- then M=−76.5;
- for f=3925, then M=−101.5;
- and
- for f>3925, then M=−101.5.
A method for implementing smart Digital Subscriber Line (DSL) for Long reach Digital Subscriber Line (LDSL) systems, the method comprising:
- defining a candidate system to be implemented by an LDSL system, wherein defining a candidate system comprises defining a number of power spectral density (PSO) masks;
- optimizing criteria associated with the candidate system to create an optimized candidate system;
- selecting the optimized candidate system to implement in an LDSL system;
- wherein,
- one of the number of masks is defined by the following relations, wherein f is a frequency band in kHz and U is the value of the mask in dBm/Hz:
- for 0<f<4, then U=−97.5;
- for 4<f<25.875, then U=−92.5+21.5 log2(f/4);
- for 25.875<f<138, then U=−34.5;
- for 138<f<276, then U=−34.5-26 log2(f/138);
- for 276<f<f_int then U=−60.5-95 log2(f/276);
- for f_int<f<686, then U=10 log10(0.05683*f^(1.5));
- and
- for f>686, then U=−100.
A method for implementing smart Digital Subscriber Line (DSL) for Long reach Digital Subscriber Line (LDSL) systems, the method comprising:
- defining a candidate system to be implemented by an LDSL system, wherein defining a candidate system comprises defining a number of power spectral density (PSD) masks;
- optimizing criteria associated with the candidate system to create an optimized candidate system:
- selecting the optimized candidate system to implement in an LDSL system;
- wherein,
- one of the number of masks is defined by the following relations, wherein f is a frequency band in kHz and D is the value of the mask in dBm/Hz:
- for 0<f<4, then D=−97.5;
- for 4<f<25.875, then D=−92.5+21 log2(f/4);
- for 25.875<f<1104, then D=−38.3;
- for 1104<f<1622, then D=−38.3-14.75 log2(f/1104);
- for 1622<f<3750, then D=−46.5-2.9 log2(f/1622);
- for f=3750, then D=−76.5;
- and
- for f>3925, then D=−101.5.
Dependencies are inferred from the claim text.