WHITE SPACE USE SYSTEM WITH CONNECTING COGNITIVE SIGNAL

• US 20130184025A1
• Filed: 12/17/2012
• Published: 07/18/2013
• Est. Priority Date: 12/15/2011
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: CHO, Sang In, JEONG, Byung Jang, KANG, Kyu Min
• Granted Patent: US 8,942,744 B2
• Time in Patent Office: Days
• US Class Current: 455/509
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA

Abstract

Provided is a white space use system using a connection recognition signal, which is associated with technology that enables white space devices to search for and to use an available frequency band in a digital broadcasting system. In particular, provided is a white space use system using a connection recognition signal that enables even devices incapable of autonomously searching for an available channel to safely use a white space in interaction with white space devices.

Claims

1. A white space use system, comprising:

a first white space device to search for an available channel using at least one of a spectrum sensing, a database access function, and a beacon transmission and reception, and to use the retrieved available channel; and

a second white space device that is not provided with a function of searching for the available channel using at least one of the spectrum sensing, the database access function, and the beacon transmission and reception,

wherein, through a cognitive radio communication scheme, the first white space device transmits a connection recognition signal including information associated with the retrieved available channel, adjusts strength of the connection recognition signal based on a distance between a distance of arrival of a protection service and a current position of the first white space device, and transmits the strength adjusted connection recognition signal, and

the second white space device recognizes the available channel used by the first white space device, based on the connection recognition signal transmitted from the first white space device.