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- W1984447308 abstract "The Cognitive Radio (CR) technology has emerged as a recent breakthrough radio technology to meet future wireless demands in terms of both efficiency and performance of new wireless applications. In an 802.11 Cognitive Radio Network (CRN), when the is not used, unauthorized users with CRs can access the frequencies assigned to authorized users in an opportunistic manner, thus dramatically improving efficiency of the network. In [5], the authors proposed a CR MAC protocol for 802.11 CRNs such that the unauthorized CR users (CRUs) can flexibly use the spectrum holes without affecting the performance of the authorized users. However, the protocol design proposed in [5] can degrade the throughput performance of TCP flows. Since TCP is a primary transport protocol for most of the internet applications today, it is imperative that a proposed CR MAC protocol can well support TCP flows. To address this problem, in this paper we propose a Bi- directional CR MAC (Bi-MAC) protocol such that the CRUs can smartly negotiate and reserve bandwidth based on the anticipated packet exchanges on the data channels. Our simulation results show that the Bi-MAC protocol can effectively improve both the TCP and UDP performance of CRUs and increase the network goodputs." @default.
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- W1984447308 date "2011-09-01" @default.
- W1984447308 modified "2023-09-23" @default.
- W1984447308 title "Bi-Directional Cognitive Radio MAC Protocol for Supporting TCP Flows" @default.
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- W1984447308 doi "https://doi.org/10.1109/vetecf.2011.6092891" @default.
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