Method and system for providing time offset to minislot clock and count in headend devices
US7006535B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2001 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Jul 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0682
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system for allocating an initial maintenance request (IMR) for an upstream channel in a communications system, wherein the communication system includes a headend and at least one remote device associated with the channel. A first propagation delay from the headend to the remote device having the greatest delay is determined. Likewise, a second propagation delay from the headend to the remote device experiencing the least delay is determined. The IMR is then defined to be shorter than the first propagation delay and at least as long as the difference between the two propagation delays. The starting point of the IMR is established by modifying the clock output of the headend. A modification value is added to the headend clock output. The modification value corresponds to a time interval that can be as long as the propagation delay from the headend to the remote having the shortest delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.