Using a transmission control protocol (TCP) channel to save power for virtual private networks (VPNs) that use user datagram protocol (UDP)
US8228830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2008 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Dec 13, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided is a method for maintaining a Virtual Private Network (VPN) connection between a mobile device and a server over a wireless network in a manner that conserves the power supply of the mobile device and is suitable for connections that employ server-initiated traffic. After a successful login to a VPN server, a VPN client establishes a Transport Control Protocol (TCP) connection and a UDP connection with the server. After a power timeout, the server calculates the elapsed time between the current transmission and the last tunnel traffic. If the elapsed time exceeds a power timeout value, the VPN server transmits a simple control message to the client via the TCP channel. The client then reestablishes the UDP connection to the client and the server resumes transmission on the reestablished UDP channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.