System and method for avoiding upstream interference in RF-over-glass network
US9031409B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2011 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Dec 30, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0252
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A headend communications device communicates via a network to downstream network elements, such as cable modems coupled behind optical network units, and allocates and grants timeslots for upstream transmissions from the network elements. The headend communications device has a scheduler for managing and controlling timeslot allocations in a manner avoiding interference such as optical beat interference or FM carrier collisions. The scheduler identifies two or more cable modems or like customer network elements served by the headend communications device that will cause at least a pre-determined intolerable level of interference when allocated overlapping timeslots for upstream transmissions and prevents these two or more cable modems or network elements from being allocated and granted overlapping timeslots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.