Systems and methods for device-to-device communication in the absence of network coverage
US9288756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2013 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Dec 23, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for establishing a secure device-to-device connection between two mobile devices involves the use of a WiFi Direct (LTE Direct or other similar protocols) link paired with an IP Multimedia Subsystems (IMS) link. A device detects the presence of another device that it wishes to connect to. The devices negotiate a group owner, then authenticate each other using a variety of techniques, such as a centrally issued certificate. Thereafter, the devices derive keys to be used for communication, both over the WiFi Direct link and via the IMS link. A WiFi Direct Link may be paired with a Push to Talk over Cellular (PoC) link in order to couple together more than two devices. In such a connection, devices transmit to a group owner, which then sends multicast versions to the rest of the group devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.