Method and apparatus for flexible spectrum usage in communications systems
US8498227B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2008 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Feb 24, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/2643
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatuses are disclosed that provide flexible use of a shared radio resource. An apparatus determines from monitoring signal energy on a shared radio resource whether other transmitters are present. A predetermined set of time division duplex (TDD) signaling patterns are identified. A correlation is performed between signal energy received on the shared radio resource and the predetermined TDD signaling patterns. The apparatus may then determine a TDD signaling pattern that may reduce or avoid interference with any other transmitters using the shared resource. The shared radio resource may be, for example, a shared frequency spectrum. Efficient allocation of radio resources among apparatuses such as radio transceivers, without fixed time references or predetermined patterns, may be obtained. The radio transceivers may be base stations or mobile user equipment in a wireless communications system. The apparatus may be an integrated circuit, a portion thereof, or chipset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.