Hybrid ranging using an out of band signal in optical networks
US9048946B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2014 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Mar 3, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0682
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of ranging comprises broadcasting a discovery request to a plurality of optical network units and receiving a respective discovery response from one or more of the plurality of optical network units. Each respective discovery response is transmitted as an out-of-band signal. The method also comprises approximating a respective out-of-band round trip delay to each corresponding optical network unit based on the respective discovery response; dynamically adjusting a size of a respective quiet window for each optical network unit based on the approximated out-of-band round trip delay; determining when to start the quiet window for each corresponding optical network unit based on the respective approximated out-of-band round trip delay; receiving an in-band ranging signal from the corresponding optical network unit during the respective quiet window; and determining an in-band round trip delay estimate based on the in-band ranging signal received during the respective quiet window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.