The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 1999
Filed:
Dec. 19, 1996
Gihad Ghaibeh, Redwood City, CA (US);
Ericsson, Inc., Menlo Park, CA (US);
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.