Title:
METHOD FOR SENSING A COOPERATIVE SPECTRUM SENSING IN A COGNITIVE RADIO ENVIRONMENT
Document Type and Number:
WIPO Patent Application WO/2012/057535
Kind Code:
A3
Abstract:
The present invention relates to a method for sensing a cooperative spectrum sensing in a cognitive radio environment, in which orthogonal codes differentiated from each other are assigned to cognitive radio users, i.e. cognitive stations, in a cognitive radio environment, and the orthogonal codes are simultaneously received as availability notification messages from the cognitive radio users so as to sense a subcarrier on which no licensed user is sensed. The method comprises: a step in which a central node transmits a query for requesting the transmission of spectrum-sensing data to each cognitive station; a step in which each cognitive station simultaneously transmits, to the central node, an availability notification message on each subcarrier that is not being used by a licensed user in response to the query using an orthogonal frequency-division multiplexing technique; and a step in which each cognitive station obtains, from the central node, report data obtained by combining the availability notification messages simultaneously transmitted from the cognitive stations over the subcarriers which are not being used by a licensed user.
Inventors:
KIM CHEE-HA (KR)
KWON SOON-MOK (KR)
KO JAE-HOON (KR)
KWON SOON-MOK (KR)
KO JAE-HOON (KR)
Application Number:
PCT/KR2011/008058
Publication Date:
June 21, 2012
Filing Date:
October 27, 2011
Export Citation:
Assignee:
TONGMYOUNG UNIVERSITY IND ACADEMIC COOPERATION FOUNDATION (KR)
KIM CHEE-HA (KR)
KWON SOON-MOK (KR)
KO JAE-HOON (KR)
KIM CHEE-HA (KR)
KWON SOON-MOK (KR)
KO JAE-HOON (KR)
International Classes:
H04W16/14; H04J11/00
Foreign References:
| KR20080007047A | 2008-01-17 | |||
| KR20090099321A | 2009-09-22 |
Other References:
GHASEMI,A.: "Spectrum sensing in cognitive radio networks: requirements, challenges and design trade-offs", COMMUNICATIONS MAGAZINE., vol. 46, April 2008 (2008-04-01), pages 32 - 39
Attorney, Agent or Firm:
NOH, Kyong-kyu (Maegang Bldg. 1503-9,Seocho-dong, Seocho-gu, Seoul 137-070, KR)
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Claims: