Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1996-10-23
2000-02-22
Pham, Chi H.
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370461, 348 6, 348 13, 455 51, H04L 1228, H04L 1243, H04N 710, H04H 100
Patent
active
060288604
ABSTRACT:
Bi-directional communications system in a CATV network utilizing cell-based Asynchronous Transfer Mode (ATM) transmissions. Packet data existing in any one of several different formats are first converted into ATM cells by a headend controller. Individual cells are then assigned a virtual connection by the headend controller. Based on the virtual connection, the cells can be prioritized and routed to their intended destinations. The cells are transmitted in a shared radio frequency spectrum over a standard cable TV network. A subscriber terminal unit demodulates the received RF signal and processes the cells for use in a computer. Likewise, computers may transmit packet data to their respective subscriber terminal units which are sent to the headend controller over the same CATV network. Hence, the present invention offers a flexible, effective, economic, and fully integrated multimedia bearer system granting immediate support for Internet services, traditional voice telephony, and digital video services over a CATV network.
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Gordon Paul A.
Helton Sanford L.
Laubach Mark E.
Nichols Kathleen M.
Raissinia Alireza
Com21, Inc.
Nguyen Steven
Pham Chi H.
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