DocumentCode :
2651671
Title :
Cooperation and coordination in cognitive networks with packet retransmission
Author :
Levorato, Marco ; Simeone, Osvaldo ; Mitra, Urbashi ; Zorzi, Michele
Author_Institution :
Dept. of Inf. Eng., Univ. of Padova, Padova, Italy
fYear :
2009
fDate :
11-16 Oct. 2009
Firstpage :
495
Lastpage :
499
Abstract :
The cognitive framework, which fosters an efficient use of the channel resource by granting access to smart and adaptive terminals, has been recently integrated with the cooperative paradigm. Accordingly, following a spectrum-leasing approach, licensed (primary) users may let unlicensed (secondary) users access the owned bandwidth in exchange for an increased performance via cooperation. Nevertheless, assuming that secondary transmission is limited to idle primary slots, as the traffic from the primary sources increases, implementation of spectrum leasing via cooperation becomes more challenging. In fact, the opportunities for secondary transmission reduce and the secondary users may find spectrum leasing not advantageous. In this paper, a solution is proposed that exploits fading temporal correlation and retransmission-based error control in order to increase secondary throughput even in high primary traffic conditions. Focusing on a simple network with a primary and a secondary source transmitting to a common destination, it is shown that the primary source may actively leave part of its channel resource to the secondary source without significant performance loss while greatly improving secondary throughput.
Keywords :
cognitive radio; fading; packet radio networks; telecommunication traffic; cognitive networks; fading temporal correlation; high primary traffic conditions; packet retransmission; retransmission-based error control; secondary transmission; spectrum-leasing approach; Bandwidth; Cognitive radio; Error correction; Fading; Information theory; Performance gain; Relays; Throughput; USA Councils; White spaces;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Theory Workshop, 2009. ITW 2009. IEEE
Conference_Location :
Taormina
Print_ISBN :
978-1-4244-4982-8
Electronic_ISBN :
978-1-4244-4983-5
Type :
conf
DOI :
10.1109/ITW.2009.5351412
Filename :
5351412
Link To Document :
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