System and methods for controlling out-of-network D2D communications
US9736874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2014 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | May 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments are provided herein for determining a synchronizing master for device-to-device (D2D) communication in a cellular network environment. In an embodiment, a user equipment (UE) receives a discovery signal comprising a timing reference, and determines a transmitter of the discovery signal. In accordance with the determination of the transmitter of the discovery signal, the UE performs one of synchronizing to the timing reference in the discovery signal and transmitting a second discovery signal. The UE performs the synchronizing to the timing reference if the transmitter of the discovery is a cellular network. Alternatively, the UE transmits the second discovery signal upon determining that the transmitter of the discovery signal is a second UE that is out of coverage of a cellular network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.