发明名称 |
CABLE NETWORK USING ATM CELLS FOR PRIORITIZED PACKET TRANSMISSION |
摘要 |
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 CAT V network.
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申请公布号 |
CA2265842(C) |
申请公布日期 |
2005.08.09 |
申请号 |
CA19972265842 |
申请日期 |
1997.06.30 |
申请人 |
COM21 |
发明人 |
NICHOLS, KATHLEEN M.;SABIN, MICHAEL J.;THAKER, MALAY M.;GORDON, PAUL A.;RAISSINIA, ALIREZA;HELTON, SANFORD L.;LAUBACH, MARK E. |
分类号 |
H04N7/173;H04L12/56;H04L27/00;H04Q11/04;(IPC1-7):H04L12/56;H04M11/06;H04N7/16 |
主分类号 |
H04N7/173 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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