Methods and apparatuses to provide synchronization symbol on demand for DSL systems

• US 20060227913A1
• Filed: 03/15/2006
• Published: 10/12/2006
• Est. Priority Date: 03/18/2005
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.), BROADCOM INTERNATIONAL LIMITED (Broadcom, Inc.)
• Inventors: Sedarat, Hossein
• Granted Patent: US 7,555,037 B2
• Time in Patent Office: Days
• US Class Current: 375/354
• CPC Class Codes: H04J 3/0647 Synchronisation among TDM nodes
• CPC Class Codes: H04L 12/40006 Architecture of a communication node current supply arrangements H04L12/10; intermediate storage or scheduling H04L49/90
• CPC Class Codes: H04L 12/4013 Management of data rate on the bus systems modifying transmission characteristics according to link quality H04L1/0001
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data

Abstract

A method and apparatus for providing synchronization data on demand are described. The method includes sending one or more synchronization parameters from a receiver to a transmitter in a data communication system, and adjusting transmission of synchronization data from a transmitter to a receiver using the one or more parameters sent by the receiver.

Claims

1. A method, comprising:

sending one or more synchronization parameters from a receiver to a transmitter in a data communication system; and

adjusting transmission of synchronization data from a transmitter to a receiver using the one or more parameters sent by the receiver.

2. The method of claim 1, wherein the one or more synchronization parameters are transmitted using an on-line reconfiguration channel.

3. The method of claim 1, wherein the one or more synchronization parameters comprise:

a future frame number in which a first synchronization data is to be sent,

a period with which a second synchronization data will be sent by the transmitter after the first synchronization data is sent, and

a duration of synchronization data.

4. The method of claim 1, wherein adjusting transmission of synchronization data comprises starting or stopping of transmission of synchronization data.

5. The method of claim 1, further comprising:

determining a need for synchronization data at the receiver by monitoring a quality of non- synchronization data received at the receiver from the transmitter.

6. The method of claim 1, wherein the synchronization data is used to adjust parameters of the data communication system.

7. An apparatus, comprising:

a transceiver to detect data in a signal, the transceiver comprising;

a synchronization data extraction module to determine a need for synchronization data, the synchronization data extraction module to request the synchronization data, and

a synchronization data insertion module to send synchronization data in response to the request for synchronization data from the synchronization data extraction module.

8. The apparatus recited in claim 7, wherein the synchronization data extraction module requests the synchronization data by sending one or more synchronization parameters to the synchronization data insertion module.

9. The apparatus recited in claim 8, wherein the one or more synchronization parameters are transmitted using an on-line reconfiguration channel.

10. The apparatus recited in claim 8, wherein the one or more synchronization parameters comprise:

a future frame number in which a first synchronization data is to be sent,

a period with which a second synchronization data will be sent by the transmitter after the first synchronization data is sent, and

a duration of synchronization data.

11. The apparatus recited in claim 8, wherein the synchronization data is used to adjust parameters of the data communication system.

12. The apparatus recited in claim 7, wherein the synchronization data extraction module determines a need for synchronization data by monitoring a quality of non-synchronization data received at the transceiver.

13. A set top box employing a digital subscriber line modem comprising the apparatus of claim 7.

14. An article of manufacture, comprising:

a machine-accessible medium that includes instructions that, when accessed by a machine, cause the machine to perform operations comprising;

sending one or more synchronization parameters from a receiver to a transmitter in a data communication system; and

adjusting transmission of synchronization data from a transmitter to a receiver using the one or more parameters sent by the receiver.

15. The article of manufacture of claim 14, wherein the data, when accessed by the machine, cause the machine to perform operations further comprising:

determining a need for synchronization data at the receiver by monitoring a quality of non- synchronization data received at the receiver from the transmitter.

16. The article of manufacture of claim 14, wherein the one or more synchronization parameters are transmitted using an on-line reconfiguration channel.

17. The article of manufacture of claim 16, wherein the one or more synchronization parameters comprise:

a future frame number in which a first synchronization data is to be sent,

a period with which a second synchronization data will be sent by the transmitter after the first synchronization data is sent, and

a duration of synchronization data.

18. The article of manufacture of claim 14, wherein adjusting transmission of synchronization data comprises starting or stopping of transmission of synchronization data.

19. The article of manufacture of claim 14, wherein the synchronization data is used to adjust parameters of the data communication system.

20. The article of manufacture of claim 14, wherein the machine accessible medium with instructions is included in a DSL modem.