Time division multiplexing over broadband modulation method and apparatus
US6763025B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2001 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Feb 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/561
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A packet switch router that processes downstream digital information to provide dedicated bandwidth to each subscriber destination in a hybrid fiber coax (HFC) network. The router includes a network module that terminates a network connection, a switch that forwards data from the network module, and a channel module. The channel module includes a switch interface, a cell processing engine, one or more modulators, and a radio frequency (RF) transmitter network. The switch interface forwards packetized data from the switch to the cell processing engine. The cell processing engine organizes the packetized data into multiple data streams, encapsulates data in each data stream into data cells, and multiplexes the data cells into a multiplexed cell stream. Each modulator is configured to modulate a multiplexed cell stream into an analog signal. The RF transmitter network up converts and combines a plurality of analog signals into a combined electrical signal for transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.