Signal amplitude and clock signal frequency selection

• US 20050063457A1
• Filed: 09/22/2003
• Published: 03/24/2005
• Est. Priority Date: 09/22/2003
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Kumar, Anil K.
• Granted Patent: US 7,606,353 B2
• Time in Patent Office: Days
• US Class Current: 375/222
• CPC Class Codes: H04L 25/0282 Provision for current-mode coupling
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04M 19/001 Current supply source at the exchanger providing current to substations
• CPC Class Codes: H04Q 2213/13039 Asymmetrical two-way transmission, e.g. ADSL, HDSL
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In one embodiment, a method is provided. The method of this embodiment may include, in response, at least in part, to receipt at a first node of a request issued from a second node to change from one mode of operation to another mode of operation, selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation. The amplitude of the signal may be different from another amplitude of the signal during the one mode of operation. The method of this embodiment also may include, in response, at least in part, to the receipt of the request, selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation. The frequency may be different from another frequency of the clock signal during the one mode of operation.

Claims

1. A method comprising:

in response, at least in part, to receipt at a first node of a request issued from a second node to change from one mode of operation to another mode of operation;

selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation, the amplitude of the signal being different from another amplitude of the signal during the one mode of operation; and

selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation, the frequency being different from another frequency of the clock signal during the one mode of operation.

2. The method of claim 1, wherein:

the selecting of the amplitude of the signal to be propagated between the first node and second node during the another mode of operation and the selecting of the frequency of the clock signal to be supplied during the another mode of operation are carried out, at least in part, at the first node.

3. The method of claim 1, wherein:

the amplitude of the signal to be propagated between the first node and the second node during the another mode of operation is less than the another amplitude;

the frequency of the clock signal to be supplied during the another mode of operation is less than the another frequency of the clock signal during the one mode of operation;

the first node comprises circuitry; and

the clock signal is supplied to the circuitry during the one mode of operation and the another mode of operation.

4. The method of claim 1, wherein:

the first node comprises digital subscriber line (DSL) modem circuitry that is capable of being coupled to the second node via a subscriber line; and

the signal that is to be propagated during the another mode of operation is to be propagated via the subscriber line.

5. The method of claim 4, wherein:

a central office (CO) comprises the second node; and

customer premises equipment (CPE) comprises the modem circuitry.

6. The method of claim 4, wherein:

prior to the receipt of the request, the clock signal is supplied to the modem circuitry; and

the method further comprises, after the receipt of the request, preventing the clock signal from being supplied to the modem circuitry.

7. The method of claim 6, further comprising:

after the selecting of the frequency of the clock signal to be supplied during the another mode of operation, permitting the clock signal to be supplied to the modem circuitry.

8. An apparatus comprising:

circuitry that is capable of, in response, at least in part, to receipt at a first node of a request issued from a second node to change from one mode of operation to another mode of operation;

selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation, the amplitude of the signal being different from another amplitude of the signal during the one mode of operation; and

selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation, the frequency being different from another frequency of the clock signal during the one mode of operation.

9. The apparatus of claim 8, wherein:

the first node comprises, at least in part, the circuitry.

10. The apparatus of claim 8, wherein:

the amplitude of the signal to be propagated between the first node and the second node during the another mode of operation is less than the another amplitude;

the frequency of the clock signal to be supplied during the another mode of operation is less than the another frequency of the clock signal during the one mode of operation;

the first node comprises the circuitry; and

the clock signal is supplied to the circuitry during the one mode of operation and the another mode of operation.

11. The apparatus of claim 8, wherein:

the first node comprises a digital subscriber line (DSL) modem that is capable of being coupled to the second node via a subscriber line, the subscriber line being to propagate the signal that this to be propagated during the another mode of operation.

12. The apparatus of claim 11, wherein:

a central office (CO) comprises the second node; and

customer premises equipment (CPE) comprises the modem.

13. The apparatus of claim 11, wherein:

prior to the receipt of the request, the clock signal is supplied to the modem; and

the circuitry is also capable of, after the receipt of the request, preventing the clock signal from being supplied to the modem.

14. The apparatus of claim 13, wherein:

the circuitry is also capable of, after selecting the frequency of the clock signal to be supplied during the another mode of operation, permitting the clock signal to be supplied to the modem circuitry.

15. An article comprising:

a storage medium having stored thereon instructions that when executed by a machine result in the following;

in response, at least in part, to receipt at a first node of a request issued from a second node to change from one mode of operation to another mode of operation;

selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation, the amplitude of the signal being different from another amplitude of the signal during the one mode of operation; and

selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation, the frequency being different from another frequency of the clock signal during the one mode of operation.

16. The article of claim 15, wherein:

the selecting of the amplitude of the signal to be propagated between the first node and second node during the another mode of operation and the selecting of the frequency of the clock signal to be supplied during the another mode of operation are carried out, at least in part, at the first node.

17. The article of claim 15, wherein:

the amplitude of the signal to be propagated between the first node and the second node during the another mode of operation is less than the another amplitude;

the frequency of the clock signal to be supplied during the another mode of operation is less than the another frequency of the clock signal during the one mode of operation;

the first node comprises circuitry; and

the clock signal is supplied to the circuitry during the one mode of operation and the another mode of operation.

18. The article of claim 15, wherein:

the first node comprises digital subscriber line (DSL) modem circuitry that is capable of being coupled to the second node via a subscriber line; and

the signal that is to be propagated during the another mode of operation is to be propagated via the subscriber line.

19. The article of claim 18, wherein:

a central office (CO) comprises the second node; and

customer premises equipment (CPE) comprises the modem circuitry.

20. The article of claim 18, wherein:

prior to the receipt of the request, the clock signal is supplied to the modem circuitry; and

the instructions when executed by the machine also result in, after the receipt of the request, preventing the clock signal from being supplied to the modem circuitry.

21. The article of claim 20, wherein the instructions when executed by the machine also result in:

after the selecting of the frequency of the clock signal to be supplied during the another mode of operation, permitting the clock signal to be supplied to the modem circuitry.

22. A system comprising:

a first node comprising circuitry that includes a circuit card and a circuit board, the circuit board including a circuit card slot that is capable of coupling the circuit card to the circuit board; and

a second node;

the circuitry being capable of, in response, at least in part, to receipt at the first node of a request issued from a second node to change from one mode of operation to another mode of operation;

selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation, the amplitude of the signal being different from another amplitude of the signal during the one mode of operation; and

selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation, the frequency being different from another frequency of the clock signal during the one mode of operation.

23. The system of claim 22, wherein:

the circuit board comprises a bus and a host processor coupled to the bus; and

the slot is also coupled to the bus.

24. The system of claim 23, wherein:

the circuit card comprises;

modem circuitry capable of being coupled to the second node via a subscriber line; and

clock generator circuitry that is capable of generating the clock signal.

25. The system of claim 24, wherein:

the system further comprises memory to store one or more values indicative, at least in part, of the frequency of the clock signal to be supplied during the another mode of operation; and

the clock generator circuitry is capable of generating the clock signal based at least in part upon the one or more values stored in the memory.

26. The system of claim 25, wherein:

the circuit card comprises the memory.

27. The system of claim 25, wherein:

the circuit card also comprises additional circuitry that is capable of preventing the clock signal from being supplied to the modem circuitry.