US 7,627,061 B2 · Communication breaking device and method thereof

Abstract

A communication breaking device for breaking communication of an apparatus which communicates by modulation and demodulation using a predetermined code sequence. The predetermined code sequence is extracted from an incoming wave and an inverted-code generator inverts the code sequence into an inverted code sequence, which is transmitted as a communication breaking wave. The phase of the inverted code sequence is advanced before transmitting as the communication breaking wave and the pilot signal, can appropriately be compensated with the advanced inverted code sequence. It can be recognized by a portable telephone that the portable telephone is deviated from a communication area for the base station. A method includes compensating the code sequence in an incoming wave by transmitting a communication breaking wave.

Claims7

Dependent claims

A communication breaking method adapted to a communication method that modulates or demodulates information about contents of communication with a predetermined code sequence, said communication breaking method comprising:

extracting the predetermined code sequence from a received incoming wave;
inverting the code sequence, extracted by said extracting, to provide an inverted code sequence;
advancing the phase of the extracted code sequence or the phase of the inverted code sequence in a quantity corresponding to at least one code of the extracted or inverted code sequence;
and
compensating the code sequence in an incoming wave by transmitting the inverted code sequence having the advanced phase as a communication breaking wave.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/993,433Filed 22 Nov 2004 · continuation

Priority

JP 11-08018124 Mar 1999

Published

US 2005/0074077 A17 Apr 2005

Granted

1 Dec 2009

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04W 48/02
Access restriction ; Network selection; Access point selection: access restriction performed under specific conditions
H04B 1/707
Spread spectrum techniques: using direct sequence modulation
H04K 3/45
Jamming having variable characteristics: characterized by including monitoring of the target or target signal, e.g. in reactive jammers or…
H04K 3/46
Jamming having variable characteristics: characterized in that the jamming signal is produced by retransmitting a received signal, after delay or…

Communication breaking device and method thereof

Life of this patent

Communication breaking device and method thereof

Life of this patent

Abstract

Claims7