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The incompleteness of the Internet AS-level topology is the most serious pitfall of research studies concerning the Internet inter-domain ecosystem. In this demo we show two projects aimed at filling this gap by offering services to different type of users. The first is Portolan, a smartphone-based crowdsourcing system which provides an app for Android that volunteers can install to run traceroute...
Efficient content delivery is a constantly evolving challenge on the modern Internet. Reducing the impact of duplicate deliveries of identical content is a key factor in reducing congestion and transit costs for smaller networks. This work leverages SDN concepts and mechanisms in order to transparently store and deliver content from a local cache to the client, thus lightening the load on the WAN...
This paper presents a dynamic adaptation process for multi-cloud applications that is composed of two phases. The first one is a modeling phase, which borrows the ability for representing commonalities and variabilities from the software product lines (SPL) paradigm. In this phase, a customized model feature specifies the configuration of cloud services to be used by an application (commonalities)...
Multi-Clouds are nowadays motivated by the needs of Cloud service consumers to ensure a certain level of service quality. Main requirements and challenges of the developing Multi-Clouds are analyzed in this paper. A particular attention is payed on the application and service portability. As complementary solution to the current approaches of using uniform application programming interfaces or standard...
The most basic function of an Internet router is to decide, for a given packet, which of its interfaces it will use to forward it to its next hop. To do so, routers maintain a routing table, in which they look up for a prefix of the destination address. The routing table associates an interface of the router to this prefix, and this interface is used to forward the packet. We explore here a new measurement...
Content-Centric Networking (CCN) promises to yield large efficiency gains for Internet content distribution. Its autonomous cache management, however, raises doubts about achieving the intended goals optimally. A coordinated cache management, based on timely usage information, will help to fully leverage the cache efficiency. In this poster we introduce CoMon, a system architecture that implements...
Smartphones contain sensors that provide information about the user of the device. Studying smartphones, therefore, provides an invaluable window into the behavioral patterns of users. In this work, we describe an open infrastructure that provides research communities with principled access to mobile devices and their sensors. Our platform, the Sensibility Testbed, is a free, community-driven platform...
We show the feasibility of using Erasure Codes (ECs) for reliable communication in strongly energy-constrained sensor network applications. In particular, we aim at observing group dynamics of bats in their natural habitat. Bats are to be equipped with ultra-light sensor nodes to continuously monitor contacts between each other and to track their flights. This data needs to be uploaded to a stationary...
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