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Data delivery in a dynamically changing spectrum environment continues to remain an unsolved problem, with existing TCP based implementations falling short owing to their inability to react swiftly to spectrum changes. This paper proposes the first equation-based transport protocol, based on the TCP Friendly Rate Control (TFRC) protocol, which uses the(More)
Sudden spectrum demands may occur in dense and congested cities, which stress the communication infrastructure. At these times, identifying alternate spectrum bands through cognitive radio (CR) technology will allow users to maintain connectivity and relieve data congestion in the unlicensed bands. However, deployment of the CR networks must be preceded by(More)
—Cognitive radio (CR) vehicular networks are poised to opportunistically use the licensed spectrum for high bandwidth inter-vehicular messaging, driver-assist functions, and passenger entertainment services. Recent rulings that mandate the use of spectrum databases introduce additional challenges in this highly mobile environment, where the CR enabled(More)
—Cognitive radio (CR) vehicular networks are poised to opportunistically use the licensed spectrum for high-bandwidth intervehicular messaging, driver-assist functions, and passenger entertainment services. Recent rulings that mandate the use of spectrum databases have introduced additional challenges in this highly mobile environment, where the CR-enabled(More)
Cognitive radio (CR) networks experience fluctuating spectrum availability that impacts the end to end bandwidth of a connection. In this paper, we conduct an extensive simulation study of three different window-based TCP flavors-NewReno, Westwood+, and Compound, each of which has unique methods to determine the available bandwidth and scale the congestion(More)
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