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...
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Main Authors | , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
07.09.2011
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Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: CN2006852408 |