Hakan Coskun

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Wireless nodes equipped with multiple radio interfaces open up new fields of application. Ranging from multi-channel usage in a cell in order to increase the bandwidth to the creation of meshed multi-hop topologies. Using multiple wireless cards demands a large physical space, more energy consumption and as a consequence decreasing in the battery lifetime.(More)
IEEE is preparing its new WLAN standard 802.11e in order to be able to cope with the emergent needs of real time traffic over wireless networks. Within this new standard there is an element called the QBSS (QoS enhanced basic service set) load element which should help in solving the problem of candidate access point selection.In this paper we show that(More)
In this paper, we solve the problem of candidate access point selection in 802.11 networks, when there is more than one access point available to a station. We use the QBSS (quality of service enabled basic service set) Load Element of the new WLAN standard 802.11e as prior information and deploy a decision making algorithm based on reinforcement learning.(More)
The statechart formalism allows for the specification of behaviour models of complex, reactive systems. It is employed in the embedded systems domain to specify and verify applications at design time. By enabling the interpretation of formalised behaviour models one earns the favourable abilities of application behaviour inspection, control, and(More)
Context provisioning refers to the trend of gathering, transporting and processing context in order to promote context awareness in Future Internet services. Context awareness enables services to become adaptive, personalized, and accessible in dynamically changing environments. In various scenarios of Internet of things (IoT), connected objects shall be(More)
Advances in the field of wireless sensors in particular and machine-to-machine communication in general are converging into the Internet of Things (IoT). Real and virtual `things' will create a pervasive information space that will hold vast amounts of data. The challenge is to give mobile users an on-demand access to this space, to discover and gather data(More)
When considering autonomic networking, where multiple self-* functionalities, in terms of node-wide or network-wide control loops, must operate, interact and proficiently collaborate, stability problems inherently arise due to the distributed nature of the decision making process and autonomic nodes interactions towards enabling various self-*(More)
The trend of using location-based services (LBS) is not new but has evolved over long time and continues to enter into new application and service landscapes. LBS have essentially targeted outdoor scenarios, whereas GPS is the de-facto standard for these cases. Indoor localization technologies are also gaining attraction. In this paper, we present our(More)