Communication network system
US6735221B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 2000 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jan 6, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2652
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital communications network system for multiple access has a head-end node and at least one station node at at least one other end node; the system comprises a head-end controller (3) capable of transmitting data and medium-access control information to at least one station (6), preferably a plurality of station means, over a set of downstream channels within a first frequency range, and receiving information from the station or stations over an upstream channel within a second frequency range; the upstream channel comprises at least one upstream subchannel, preferably a plurality of upstream subchannels; the system further comprises at least one connection, preferably a plurality of connections, for connecting the head-end controller with the station or stations; each station includes means for receiving data and medium-access control information from the head-end controller; further means are provided for sending a data stream at a first signal level over at least one upstream subchannel, preferably a plurality of upstream subchannels; the station further includes means for sending at least one ranging request message to the head-end controller over at least one upstream sub…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.