Ranging and registering cable modems under attenuated transmission conditions
US7856049B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2004 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Oct 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03477
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cable modem communication system includes a plurality of Cable Modems (CMs), a CM network segment, and a Cable Modem Termination System (CMTS). The CMTS segregates the plurality of CMs into a first group of CMs with which standard registering and ranging operations are performed and a second group of CMs with which attenuated transmission registering and ranging operations are performed. Each CM of the first group of CMs operable to perform registering and ranging operations by transmitting a ranging burst of a first format. Each CM of the second group of CMs operable to perform registering and ranging operations by transmitting a ranging burst of a second format that differs from the ranging burst of the first format. The CMTS may include a rake receiver that receives and demodulates a plurality of multi-path copies of the ranging burst of the second format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.