US 12,267,151 B2
Communication network terminating device, communication system, signal jamming method and signal jamming program
Akihiro Tanabe, Musashino (JP); Toshiaki Shitaba, Musashino (JP); Takashi Mitsui, Musashino (JP); and Tomoaki Yoshida, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 18/012,076
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Jul. 2, 2020, PCT No. PCT/JP2020/026011
§ 371(c)(1), (2) Date Dec. 21, 2022,
PCT Pub. No. WO2022/003898, PCT Pub. Date Jan. 6, 2022.
Prior Publication US 2023/0254060 A1, Aug. 10, 2023
Int. Cl. H04J 14/00 (2006.01); H04J 14/02 (2006.01); H04B 10/25 (2013.01); H04B 10/2575 (2013.01); H04K 3/00 (2006.01); H04N 7/16 (2011.01)
CPC H04J 14/0298 (2013.01) [H04B 10/25 (2013.01); H04B 10/25751 (2013.01); H04J 14/00 (2013.01); H04K 3/00 (2013.01); H04N 7/166 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A communication network termination apparatus comprising:
a reception processor connected to a wired communication network, and configured to output a frequency division multiplexed signal obtained from a transmission signal transmitted over the wired communication network;
an output controller configured to output, in a case that apparatus identifying data matches an apparatus identifying data stored in a storage of the communication network termination apparatus, a frequency band specifying data indicating a frequency band corresponding to signal specifying data, where the apparatus identifying data being for requesting signal quality degradation, and the signal specifying data being for specifying a carrier signal requesting signal quality degradation among a plurality of carrier signals included in the frequency division multiplexed signal;
a disturbing signal generator configured to generate a disturbing signal in a frequency band corresponding to the frequency band specifying data output by the output controller; and
a multiplexer configured to multiplex the frequency division multiplexed signal and the disturbing signal to output,
the output controller, in a case that the apparatus identifying data the signal specifying data specifying each of the plurality of carrier signals included in the frequency division multiplexed signal and the frequency band specifying data in association with each other, and the apparatus identifying data acquired matches, refers to the storage to detect the frequency band specifying data corresponding to the signal specifying data, and outputs the detected frequency band specifying data,
the output controller, in a case the signal specifying data is the frequency band specifying data and apparatus identifying data acquired matches the apparatus identifying data stored in a storage, outputs the signal specifying data as the frequency band specifying data.