Ensuring physical locality of entities sharing data
US8233432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2007 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Apr 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/2838
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for ensuring that data is only distributed within a certain physical area are disclosed. In one embodiment, a method provides that data is distributed only if the distance between a source and a sink is within a distance threshold. Under this system, the distance between the source and the sink may be estimated directly or indirectly. In some embodiments, the distance may be estimated by estimating the propagation delay for a signal traversing between the devices. The physical distance between the devices may be determined from the propagation delay. If the physical distance is outside a threshold value, the source may be prohibited from transmitting the data or the sink may refuse to display the data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.