Handshaking communication system and method for multiple xDSL

Details Handshaking communication system and method for multiple xDSL Handshaking communication system and method for multiple xDSL

2007-05-29

2007-05-29

Tse, Young T. (Department: 2611)

Pulse or digital communications

Transceivers

Modems

Reexamination Certificate

active

09916653

ABSTRACT:
A system and method for handshaking multiple xDSL technologies is provided. More particularly, the present invention provides a means for new xDSL technologies such as VDSL to negotiate usage of bidirectional frequencies while maintaining backward compatibility with legacy, i.e. non-VDSL modems. In an embodiment, a central office modem configured to operate using VDSL technology provides a modified signal to a remotely located modem. The modified signal provides capability indicators to the remotely located modem that indicate the central office modem is able to use the VDSL bidirectional frequencies. However, the modified signal also maintains sufficiently similar characteristics to traditional capability indicators so that it can be interpreted by legacy modems.

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Mestdagh, D. J. G. et al., “Zipper VDSL: A Solution for Robust Duplex Communication Over Telephone Lines,” XP-000949788, Piscataway, NJ, IEEE Communications Magazine, vol. 38, No. 5, May 2000, pp. 90-96.
“G.hs bis: G. vdsl and Implications to G.hs,”, XP-002203784, Temporary Document HC-074, ITU-Study Group 15, http://www.kiwin.com/xdsl/HC-074.pdf, [internet], Jun. 28, 2002.
International Search Report for international application No. PCT/US01/23759, filed Jul. 30, 2001.

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