Method and apparatus for communicating by use of relaying...

Details Method and apparatus for communicating by use of relaying... Method and apparatus for communicating by use of relaying...

2011-01-25

2011-01-25

Duong, Frank (Department: 2474)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

Reexamination Certificate

active

07876733

ABSTRACT:
A communication method and apparatus of a cognitive radio (CR) environment using a relaying system while not interfering with a communication system having a priority right to use a frequency band, the communication method including: listening to fundamental channel (FCH) information and/or downlink/uplink (DL/UL) map information of a frame transmitted in the relaying system; obtaining a transmission signal of the relaying system using the FCH information and/or the DL/UL map information; orthogonally encoding data to be transmitted in the CR environment based on the obtained transmission signal; and transmitting the orthogonally encoded data via a determined channel that is used in the relaying system. Accordingly, aspects of the present invention can retrieve radio resources unused in the CR environment more easily.

REFERENCES:
patent: 7558293 (2009-07-01), Choi et al.
patent: 2007/0274275 (2007-11-01), Laroia et al.
Devroye et al, Limits on Communications in a Cognitive Radio Channel, IEEE, 6 pages, 2006.
IEEE P802.22, A PHY/MAC Proposal for IEEE 802.22 WRAN Systems Part 2: The Cognitive MAC, IEEE, 220 pages, Mar. 2006.

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