Communication system using frequency according to security or transmission distance

The invention provides a communication system using a frequency determined according to information security protection or a transmission distance of a signal is provided. A local area communication requiring information security protection uses a frequency less than a predetermined frequency, and a...

Full description

Saved in:
Bibliographic Details
Main Authors SUNG JIN-BONG, PARK DUCK-GUN, HWANG JUNG-HWAN, KANG SUNG-WEON, HYOUNG CHANG-HEE, KIM JIN-KYUNG
Format Patent
LanguageChinese
English
Published 07.09.2011
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
Online AccessGet full text

Cover

More Information
Summary:The invention provides a communication system using a frequency determined according to information security protection or a transmission distance of a signal is provided. A local area communication requiring information security protection uses a frequency less than a predetermined frequency, and a local or wide area communication requiring no information security protection uses a frequency greater than predetermined frequency, thereby providing an effective communication environment based on information security protection, a communication distance, and communication characteristics satisfying frequency characteristics of a transmission medium, and accordingly increasing a communication field.
Bibliography:Application Number: CN2006852408