TY - GEN
T1 - Cognitive radio
T2 - 2008 IEEE Global Telecommunications Conference, GLOBECOM 2008
AU - Jiang, Hai
AU - Lai, Lifeng
AU - Fan, Rongfei
AU - Poor, H. Vincent
PY - 2008
Y1 - 2008
N2 - This paper investigates the problem of maximally utilizing the spectrum opportunities in cognitive radio networks with multiple potential channels. In particular, the optimal sensing order problem in multi-channel cognitive medium access control with opportunistic transmissions is studied. It is first shown that, when the potential channels are identical (except for the availability probabilities) and independent, the intuitive sensing order (i.e., descending order of the channel availability probabilities) does not lead to optimality in general. A dynamic programming approach for the search of optimal sensing order is then presented. Finally, for some special cases, it is proved that a simple optimal sensing order does exist.
AB - This paper investigates the problem of maximally utilizing the spectrum opportunities in cognitive radio networks with multiple potential channels. In particular, the optimal sensing order problem in multi-channel cognitive medium access control with opportunistic transmissions is studied. It is first shown that, when the potential channels are identical (except for the availability probabilities) and independent, the intuitive sensing order (i.e., descending order of the channel availability probabilities) does not lead to optimality in general. A dynamic programming approach for the search of optimal sensing order is then presented. Finally, for some special cases, it is proved that a simple optimal sensing order does exist.
KW - Cognitive radio
KW - Medium access control
UR - http://www.scopus.com/inward/record.url?scp=67249095100&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67249095100&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2008.ECP.929
DO - 10.1109/GLOCOM.2008.ECP.929
M3 - Conference contribution
AN - SCOPUS:67249095100
SN - 9781424423248
T3 - GLOBECOM - IEEE Global Telecommunications Conference
SP - 4851
EP - 4855
BT - 2008 IEEE Global Telecommunications Conference, GLOBECOM 2008
Y2 - 30 November 2008 through 4 December 2008
ER -