Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2011-04-19
2011-04-19
Afshar, Kamran (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S452100, C455S426100, C370S338000
Reexamination Certificate
active
07929963
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.
REFERENCES:
patent: 7313393 (2007-12-01), Chitrapu
patent: 7349699 (2008-03-01), Kelly et al.
Bae Chi Sung
Cho Dong Ho
Lee Ho Won
Lee Woong Sup
Afshar Kamran
Graybeal Jackson LLP
Jablonski Kevin D.
Korean Advanced Institute of Science and Technology
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