Apparatus and method for positioning single-offset zones in a spot beam coverage area to maximize call duration in a satellite-based communications network
US6553225B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Oct 14, 1999 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Oct 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/1851
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus and method, for use in a satellite-based communications network, for positioning offset zones in a spot beam coverage area to maximize call duration. The apparatus and method employs a spot beam segregator and an offset zone arranger. The spot beam segregator segregates a coverage area of a spot beam generated by a satellite in the network into at least one offset zone based on respective propagation time periods required for signals to travel between the satellite and respective different locations in the coverage area. The offset zone arranger arranges each offset zone such that each respective center of each one offset zone overlaps a respective geographical location in the coverage area, with each respective geographic location having a respective access terminal density greater than any other geographical region within its respective offset zone. The burst offset to be assigned to each single-offset zone is then determined based on the propagation delay at each respective highest access terminal density region in the respective zones. Therefore, within each offset zone, the amount of access terminals whose guard time between bursts received and transmitted is opti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.