RF firewall for a wireless network

Details RF firewall for a wireless network RF firewall for a wireless network

2004-07-21

2008-09-09

Zand, Kambiz (Department: 2134)

Information security

Access control or authentication

Network

Reexamination Certificate

active

07424738

ABSTRACT:
Limiting RF signal reception outside of a perimeter boundary to enhance security in a wireless network. A central jamming controller (CJC) communicates with one or more access points within a wireless network to determine if link activity is present within a cell controlled by a specific access point. Link activity comprises transmissions from an authorized communication device (ACD) to the access point and transmissions from the access point to the ACD. When link activity is detected, the CJC directs a jamming antenna system to produce a jamming signal and to transmit the jamming signal outside of the perimeter boundary defined by the WLAN. The jamming signal comprises noise transmitted within the bandwidth of the channel being used by the access point and the ACD to communicate within the cell. An unauthorized communication device (UCD) outside of the perimeter boundary will be prevented from receiving the communication between the access point and the ACD because of the jamming signal.

REFERENCES:
patent: 4498193 (1985-02-01), Richardson
patent: 7177294 (2007-02-01), Chen et al.
Bucholtz, 1997, http://telephonyonline.com/mag/telecom—jamming—hackers—security/.

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