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OPTIMAL RESOURCE ALLOCATION IN RANDOM ACCESS COOPERATIVEOPTIMAL RESOURCE ALLOCATION IN RANDOM ACCESS COOPERATIVE COGNITIVE RADIO NETWORKS

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COGNITIVE RADIO NETWORKS

                   Cooperative cognitive radio networks (CCRNs) incorporates cooperative communication into cognitive radio networks, in which, primary users lease their spectrum to secondary users, and in exchange, the primary users leverage secondary users as cooperative relays to enhance their own throughput. Mobile operators offload their Internet traffic to privately owned Wi-Fi access points (APs), much to the inconvenience of non-cellular users served by the APs. However, by employing the CCRN scheme, the mobile operator can lease a licensed channel to the AP, effectively doubling its capacity. In this paper, we propose an implementation of the CCRN framework applied to IEEE 802.11 WLANs.


OPTIMAL RESOURCE ALLOCATION IN RANDOM ACCESS COOPERATIVEOPTIMAL RESOURCE ALLOCATION IN RANDOM ACCESS COOPERATIVE COGNITIVE RADIO NETWORKS


                                   MOBILE data offload to small cell technology such as Wi- Fi or femtocell provides a compelling solution for mobile operators who want to relieve the strain on their core networks. Compared to cellular macro cells, small cells provide increased spectrum reuse in the coverage area, higher signal to noise ratio in the cell (hence superior link bit rate for its users), and are highly cost effective even for large scale deployments. Furthermore, the reduced transmission times enabled by the superior link bit rates in the small cells directly translate into battery power saving for the user devices. Wi-Fi hotspots operate in the unlicensed bands and suffer from severe interference due to scarce spectrum availability. 


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