Pantelis A. Frangoudis

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Wireless Community Networks (WCNs) are wide-area wireless networks whose nodes are owned and managed by volunteers. We focus on the provision of Internet access to mobile users through WCN-controlled wireless LAN access points (APs). We rely on reciprocity: a person participates in the WCN and provides ‘free’ Internet access to mobile users in order to(More)
Driven by their low cost and ease of deployment, as well as their operation in unlicensed spectrum bands, IEEE 802.11-based Wireless Local Area Networks (WLANs), also termed Wi-Fi, have been established as the de facto access technology for local area wireless connectivity. Especially in densely-populated urban areas, WLAN presence is ubiquitous.(More)
In densely populated cities, Wi-Fi networks-private or otherwise-are ubiquitous. We focus on the provision of citywide broadband communication capability to mobile users through private Wi-Fi networks that are in range but belong to others. We form a club that relies on indirect reciprocity: Members participate in the club and provide free Wi-Fi access to(More)
In recent years, we have witnessed a trend towards open wireless access, mainly driven by the low cost of IEEE 802.11-capable equipment and its operation in unlicensed spectrum. This trend has many faces; municipalities set up free Wi-Fi hotspots for Internet connectivity in public spaces, while Wi-Fi access is provided as an extra service to customers in(More)
The trend towards the cloudification of the 3GPP LTE mobile network architecture and the emergence of federated cloud infrastructures call for alternative service delivery strategies for improved user experience and efficient resource utilization. We propose Follow-Me Cloud (FMC), a design tailored to this environment, but with a broader applicability,(More)
IEEE 802.11 k is an extension of the IEEE 802.11 specification for radio resource measurements. In an IEEE 802.11 k-enabled wireless LAN, an access point or other network element may request from a client or another access point to monitor and report the load of a channel. We call the latter a channel monitoring station. In this paper we propose a mechanism(More)
Wireless Community Networks (WCNs) are metropolitan-area networks with nodes owned and managed by volunteers. These networks can be used to build large scale public infrastructures for providing ubiquitous wireless broadband access through the private contributions of individual community members who use their hotspots to forward foreign traffic from and to(More)
To enhance video streaming experience for mobile users, we propose an approach towards Quality-ofExperience (QoE) aware on-the-fly transcoding. The proposed approach relies on the concept of Mobile Edge Computing (MEC) as a key enabler in enhancing service quality. Our scheme involves an autonomic creation of a transcoding service as a Virtual Network(More)