Network architecture for broadband data communication over a sha

Details Network architecture for broadband data communication over a sha Network architecture for broadband data communication over a sha

1996-12-19

1999-07-20

Nguyen, Chau

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370449, 370486, 348 7, 348 12, H04L 12403, H04H 102

Patent

active

059264764

ABSTRACT:
Network architectures and data communication protocols for supporting both downstream and upstream transport of digital data between a headend facility and multiple downstream network terminals over a shared communication medium include downstream framing protocols compatible with DAVIC/DVB modem transmission framing synchronization and FEC standards at the physical layer. The downstream data frames are formed by two or more repeating pairs of DVB compatible frame slots, wherein each downstream frame is transmitted over the same interval, e.g., 250 .mu.sec in preferred formats, regardless of the number of DVB slot pairs it contains. All downstream frame rates are supported by a single upstream data rate. Upstream bandwidth is allocated based on a selected set of operating criteria and service type priorities, based on both a polling basis and a contention basis, on one or more in-band RF carrier channels. Low delay services such as synchronous telephony are provided with requisite delivery and priority.

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