Multiplex communications – Crosstalk suppression
Reexamination Certificate
2003-05-12
2009-08-25
Rao, Seema S (Department: 2416)
Multiplex communications
Crosstalk suppression
C370S280000, C370S282000, C370S296000, C370S468000
Reexamination Certificate
active
07580344
ABSTRACT:
A Home Phoneline system operating within a Multiple Dwelling Unit includes a Home Phoneline Access Multiplexer (HPAN) that services a plurality of Home Phoneline networks, each including at least one Home Phoneline station. The HPAN synchronizes upstream and downstream transmissions to eliminate Near-Far cross-talk. According to a second operation of the present invention, the HPAN manages the transmission power of the HomePNA stations of the HomePNA networks to reduce Near-Near and Far-Far cross-talk. To optimize throughput across the whole building, station power levels are adjusted based on their location in terms of amounts of attenuation. A third method of operation according to the present invention includes adjusting the receiver sensitivity of the Home Phoneline stations according to detected or characterized levels of cross-talk within the MDU.
REFERENCES:
patent: 6798769 (2004-09-01), Farmwald
patent: 6988212 (2006-01-01), Hamdi
patent: 7027537 (2006-04-01), Cheong et al.
patent: 7085281 (2006-08-01), Thomas et al.
patent: 2002/0128009 (2002-09-01), Boch et al.
patent: 2004/0208158 (2004-10-01), Fellman et al.
Broadcom Corporation
Chan Sai-Ming
Garlick & Harrison & Markison
Harrison James A.
Rao Seema S
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