US 8,526,395 B2Granted

Using code channel overrides to suppress CDMA wireless devices

AssigneeL-3 Communications Corporation

InventorJames D Haverty

Life of this patent

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Abstract

Techniques for generating an interloping beacon which can control the behavior of a target wireless device on a CDMA frequency channel without noticeably altering the behavior of non-target wireless devices which share the frequency channel of the target wireless device's live beacon. The interloping beacon is an override beacon which overrides the live beacon's pilot channel and a control message on a code channel on which control messages may be addressed to the target wireless device. The override beacon provides the overriding pilot and the overriding control message only as long as is required for the target wireless device to respond to the overriding control message. The period of time during which the overriding pilot and the overriding control message are generated for the override beacon is so short that only the target wireless device responds without noticeable effect on collateral wireless devices.

Claims2

Dependent claims

A method of using an interloping beacon to cause a call involving a target wireless device and a live beacon to terminate, the target wireless device operating on a frequency channel of the live beacon in a wireless network that operates according to a standard that employs code division multiplexing to define code channels in the frequency channel, the code channels including a pilot channel for a pilot provided by the live beacon and a traffic channel for the call,

the method comprising the steps performed by a signal generator which generates the interloping beacon of:
on the frequency channel of the live beacon, generating an overriding pilot on the pilot channel to which the target wireless device responds rather than responding to the pilot of the live beacon;
and
on the frequency channel of the live beacon, generating one or more overriding symbols on the traffic channel which will result in the call being terminated, the overriding pilot and the overriding symbol being generated by the signal generator only as long as required to cause the call to terminate in response to the overriding symbol,
whereby causing the call to terminate does not cause another wireless device operating on the frequency channel to respond to the overriding pilot in a manner which is noticeable by a user of the other wireless device.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/877,064Filed 7 Sep 2010 · continuation in part
Priority: 4 Sep 2009
Published: US 2011/0059689 A110 Mar 2011
Granted: 3 Sep 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H04K 3/65
Jamming involving special techniques: using deceptive jamming or spoofing, e.g. transmission of false signals for premature triggering of RCIED,…
H04L 63/30
Network architectures or network communication protocols for network security: for supporting lawful interception, monitoring or retaining of…
H04W 12/02
Security arrangements; Authentication; Protecting privacy or anonymity: protecting privacy or anonymity, e.g. protecting personally identifiable…
H04W 12/126
Detection or prevention of fraud: anti-theft arrangements, e.g. protection against subscriber identity module [SIM] cloning

Family

Application61/239,890Us provisional application · filed 4 Sep 2009
Application12/846,633Parent of this continuation-in-part · filed 29 Jul 2010
US 2011/0059689 A1Pre-grant publication · published 10 Mar 2011
US 2010/0309884 A1Published application
US 8,477,727 B2Related patent
US 8,526,395 B2This patent

From the US filing history. Foreign family members aren’t listed.