Patent · US Active

Identifying rogue GSM base stations by intercepting downlink beacon channels

US8611470B2 · kind B2 · utility

1Cited by

2References

20Claims

0Family size

Assignee

National Instruments Corporation · US

Inventors

Utkarsh Gupta · Delhi, IN
Sartaj Chaudhary · Mumbai, IN
Baijayanta Ray · Bengaluru, IN

Key dates

Filing date	Mar 4, 2011
Grant date	Dec 17, 2013
Priority date	—
Expiry date	Nov 10, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04W84/12
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

System and methods and memory media for identifying a rogue base station. A receiver captures an input signal that includes a mixture of the rogue station's transmission and the transmission of a victim base station. The victim station's transmission is removed from the mixture. A plurality of channel signals are extracted from the residual signal. The channel signals are analyzed which of them are “valid”, i.e., contain a GMSK-modulated GSM signal. The “valid” channel signals are low pass filtered and then analyzed to determine which of them corresponds to the beacon channel. Information identifying the rogue base station is extracted from the beacon channel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.