Superframe alignment to a pre-existing ADSL data exchange

Details Superframe alignment to a pre-existing ADSL data exchange Superframe alignment to a pre-existing ADSL data exchange

2005-07-05

2005-07-05

Phu, Phuong (Department: 2631)

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

C375S356000, C375S362000, C375S260000, C375S222000, C370S480000, C370S509000

Reexamination Certificate

active

06914952

ABSTRACT:
A digital subscriber line network allows a plurality of remote modems to communicate without interfering with the communication to the central office. Each symbol of a superframe is converted to a tone vector, and the tone vectors are integrated over a plurality of superframes. The tone vectors of the data symbols are random, and tend to cancel each other out. The tone vector of the synchronization symbol remains constant among the plurality of superframes, and the sum of these tone vectors over a plurality of superframes becomes large. By identifying the largest integrated tone vectors, the network may identify the position of the synchronization symbol. The modems may then align using the position of the synchronization symbol.

REFERENCES:
patent: 6134283 (2000-10-01), Sands et al.
patent: 6366554 (2002-04-01), Isaksson et al.
patent: 6456654 (2002-09-01), Ginesi et al.
patent: 6493395 (2002-12-01), Isaksson et al.
“Series G: Transmission Systems And Media, Digital Systems And Networks—Asymmetric Digital Subscriber Line (ADSL) Transceivers”, ITU-T G.992.1, Jun. 1999, pp. i-240.
“Series G: Transmission Systems And Media, Digital Systems And Networks—Annex H: Specific Requirements For A Synchronized Symmetrical DSL (SSDSL) System Operating In The Same Cable Binder As ISDN As Defined In ITU-T Recommendation G-961 Appendix III”, ITU-T G.992.1 Annex H, Oct. 2000, pp. 1-38.

Affiliated with

Also associated with

Rating

Superframe alignment to a pre-existing ADSL data exchange does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Superframe alignment to a pre-existing ADSL data exchange, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Superframe alignment to a pre-existing ADSL data exchange will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3413291