Support of physical layer security in wireless local area networks
US8433894B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2009 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Sep 10, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for performing physical layer security operation are disclosed. A physical layer performs measurements continuously, and reports the measurements to a medium access control (MAC) layer. The MAC layer processes the measurements, and sends a security alert to a security manager upon detection of an abnormal condition based on the measurements. The security manager implements a counter-measure upon receipt of the security alert. The measurements include channel impulse response (CIR), physical medium power measurement, automatic gain control (AGC) value and status, automatic frequency control (AFC) gain and status, analog-to-digital converter (ADC) gain, Doppler spread estimate, and/or short preamble matched filter output. The security manager may switch a channel, switch a channel hopping policy, change a back-off protocol, or change a beamforming vector upon reception of the security alert.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.