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Volume 9, September
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Volume 9, March

J. Sens. Actuator Netw., Volume 9, Issue 2 (June 2020) – 14 articles

Cover Story (view full-size image): Cognitive radio (CR) technology uses the wireless spectrum opportunistically, when it is not being used by the licensed user. In CR ad hoc networks, mobile users form a distributed multi-hop network using the unused spectrum. The qualities of the channels vary in different locations. When a user moves from one place to another, a switch in the channel is needed to maintain the quality-of-service (QoS) required by different applications. The user needs to switch to an operating channel that meets the QoS requirement during movement. Channel switching is costly because reestablishing connection takes some time, during which the data flow is interrupted. In this paper, we study the mobility patterns of users and predict their next locations and probabilities of moving there based on their movement history. We use the mobility patterns with the spectrum database and perform a probabilistic [...] Read more.
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