Method for maintaining candidate handoff list for airborne cellular system
US6856803B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2000 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Oct 15, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A terrestrial cell site handoff list is dynamically maintained for an airborne cellular system. A beam pattern is maintained relative to an airborne cellular system repeater, but rotates relative to the geographic area of coverage. A location and heading of the airplane, locations of respective beams transmitted from the airplane based on airplane flight pattern data, and locations of respective cell sites within a vicinity of footprints of the respective beams transmitted from the airplane are determined. A list of viable handoff terrestrial cell site candidates is then calculated based on the beam pattern, the location and heading of the airplane, the locations of respective beams transmitted from the airplane based on airplane flight pattern data, and the locations of respective cell sites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.