The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 2011
Filed:
Oct. 30, 2007
Dong Ho Cho, Daejeon, KR;
Ho Won Lee, Daejeon, KR;
Chi Sung Bae, Daejeon, KR;
Woong Sup Lee, Daejeon, KR;
Dong Ho Cho, Daejeon, KR;
Ho Won Lee, Daejeon, KR;
Chi Sung Bae, Daejeon, KR;
Woong Sup Lee, Daejeon, KR;
Korean Advanced Institute of Science and Technology, Daejeon, KR;
Abstract
A cognitive radio-based wireless communication system and an air interface method in a physical layer and a data link layer, which constitute a cognitive radio-based next-generation wireless communication system. The air interface method for wireless communication in the cognitive radio-based wireless communication system of the present invention is provided in the cognitive radio-based wireless communication system including a base station system and a plurality of mobile station systems. The base station system and a certain mobile station system communicate with each other using an overlay method that uses a spectrum hole. The base station system and the mobile station system switch from the overlay method to an underlay method to communicate with each other when a paying user having high priority performs communication using the spectrum hole.