Node location by differential time measurements
US5247464A · kind A · utility
25Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 1989 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | May 25, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for determining the physical location of nodes on a network. The system includes two stations each of which has a clock. Each station uses its clock to determine the arrival times at the station of a packet transmitted over the network from a first node to a second node and of a reply packet sent by the second node to the first node. The arrival times of the packets and the corresponding reply packets are then used to calculate the distance along the network which separates the first and second node. Measurement of packet arrival times for all of the nodes yields the position of all of the nodes on the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.