Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2005-11-03
2009-06-16
Cho, Hong (Department: 2419)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S445000, C709S246000
Reexamination Certificate
active
07548549
ABSTRACT:
Ethernet packets are transmitted in full duplex mode over a single coaxial cable, such as RG6 and RG59. Symmetrical full duplex operation is achieved by separating the upstream and downstream signals in the frequency domain whereby a 100BaseT signal is transmitted unmodified in one direction while the other is modulated upon a high frequency carrier to be transmitted in the other direction. In a second embodiment, the separation is in the time domain whereby the signals are sampled in blocks, each block compressed in time and transmitted at a higher rate, thus allowing for the interleaving of upstream and downstream blocks on the same coaxial cable. In a third embodiment, different rate upstream and downstream signals are separated in the frequency domain, but without modulation. The resulting asymmetrical 1000/100 Mb/s Ethernet over coax link is valuable in network architectures where asymmetry in the up and down traffic loads is expected.
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Bacque James Benson
Bergeron Jeffrey James
Loh Huck Kung
Remedios Derrick
Cho Hong
Donnelly Victoria
Jacobi Systems Corporation
Scheibel Robert C
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