System and method of unlicensed bi-directional communications over an ultra-high frequency (UHF) band reserved for licensed communications
US8155603B2 · kind B2 · utility
1Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Oct 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods of unlicensed bi-directional communications over Ultra-High Frequency (UHF) band reserved for licensed communications are provided. A base transceiver station scans the UHF band to identify unused frequency bands. When an unused frequency band is detected, the base transceiver station transmits a tone indicating that the unused frequency band can be used for communicating with the base transceiver station. When the base transceiver station determines that the unused frequency band is being used, then the base transceiver station scans the UHF band to identify another unused frequency band for communications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.