Multi-beam antenna system for high speed data
US6804521B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2001 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Sep 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method reduces cross-beam interference in multi-beam wireless data-transmission system through temporal separation of the multiple beams. A sector of a cell is geographically divided such that a number of beam patterns correspond to a number of user-group areas. For example, the sector can be divided such that four user-group areas are created. The number of groups and beam patterns can be increased or decreased. Forward link transmissions from a base station to a plurality of user terminals are patterned such that transmissions to adjacent user-group areas do not occur during the same time intervals. According to one operation, pilot signal transmissions are suppressed within a beam if no data is transmitted during a corresponding temporal period. According to another operation, temporal guard slots are introduced to avoid inter-cell interference. Further, in some operations, user terminals report to the base station to indicate one or more preferred user-group areas for their inclusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.