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US 7,068,755 B2Granted
Methods and apparatus for characterizing subscriber loop based on analysis of DSL handshaking signals and for optimization of DSL operation
AssigneeIntel Corporation
InventorSigang Qiu
Life of this patent
Estimating the term…
Abstract
In some embodiments, a method includes performing at least part of a digital subscriber line (DSL) handshaking process by transmitting at least one handshaking signal via a telephone subscriber loop, and analyzing the at least one handshaking signal to detect a characteristic of the telephone subscriber loop.
Claims16
A method comprising:
- performing at least part of a digital subscriber line handshaking process by transmitting at least one handshaking signal to or from a DSL modem via a telephone subscriber loop;
- and
- analyzing the at least one handshaking signal to detect an estimated length of the telephone subscriber loop;
- wherein the analyzing includes calculating a ratio of a power spectrum density of upstream signal carriers to a power spectrum density of downstream signal carriers, and the analyzing further includes calculating a ratio of a power spectrum density of a first group of downstream signal carriers to a power spectrum density of a second group of downstream signal carriers.
1 more element
An apparatus comprising:
- a memory;
- a processor coupled to the memory to:
- receive at least one handshaking signal transmitted to or from a DSL modem via a telephone subscriber loop in connection with a digital subscriber line handshaking process;
- and
- analyze the at least one handshaking signal to detect an estimated length of the telephone subscriber loop;
- wherein the analyzing includes calculating a ratio of a power spectrum density of upstream signal carriers to a power spectrum density of downstream signal carriers, and the analyzing further includes calculating a ratio of a power spectrum density of a first group of downstream signal carriers to a power spectrum density of a second group of downstream signal carriers.
3 more elements
An apparatus comprising:
- means for receiving at least one handshaking signal transmitted to or from a DSL modem via a telephone subscriber loop in connection with a digital subscriber line handshaking process;
- and
- means for analyzing the at least one handshaking signal to detect an estimated length of the telephone subscriber loop;
- wherein the analyzing includes calculating a ratio of a power spectrum density of upstream signal carriers to a power spectrum density of downstream signal carriers, and the analyzing further includes calculating a ratio of a power spectrum density of a first group of downstream signal carriers to a power spectrum density of a second group of downstream signal carriers.
1 more element
An apparatus comprising:
- a storage medium having stored thereon instructions that when executed by a machine result in the following:
- receiving at least one handshaking signal transmitted to or from a DSL modem via a telephone subscriber loop in connection with a digital subscriber line handshaking process;
- and
- analyzing the at least one handshaking signal to detect an estimated length of the telephone subscriber loop;
- wherein the analyzing includes calculating a ratio of a power spectrum density of upstream signal carriers to a power spectrum density of downstream signal carriers, and the analyzing further includes calculating a ratio of a power spectrum density of a first group of downstream signal carriers to a power spectrum density of a second group of downstream signal carriers.
2 more elements
A system comprising:
- a radio frequency transceiver;
- and
- a digital subscriber line modem coupled to the radio frequency transceiver, the digital subscriber line modem including:
- a memory;
- a processor coupled to the memory to:
- receive at least one handshaking signal transmitted to said digital subscriber line modem via a telephone subscriber loop in connection with a digital subscriber line handshaking process;
- and
- analyze the at least one handshaking signal to detect an estimated length of the telephone subscriber loop;
- wherein the analyzing includes calculating a ratio of a power spectrum density of upstream signal carriers to a power spectrum density of downstream signal carriers, and the analyzing further includes calculating a ratio of a power spectrum density of a first group of downstream signal carriers to a power spectrum density of a second group of downstream signal carriers.
6 more elements
Dependencies are inferred from the claim text.