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Lefteris Mamatas
University of Macedonia
57Publications
14H-index
461Citations
Publications 58
Newest
IoT has evolved from an experimental to a backbone technology able to connect myriads of people, things, and services for a large range of businesses. At the same time, the emergence of SDN can ideally handle IoT challenges for elasticity, heterogeneity, and mobility, offering an architecture that abstracts decision making away from the data plane and providing a programmable network facility. Along these lines, we propose MINOS, a multi-protocol SDN platform for IoT that implements service awar...
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Dynamic end-to-end cloud network slices following a Slice-as-a-Service (SaaS) paradigm offer promising opportunities in support of diverse vertical industries attached to different administrative domains. This paper presents a distributed Marketplace model to dynamically create cloud network slices involving different slice resource providers. Portrayed through the lens of three reference use case scenarios, we discuss potential attributes of having a Marketplace and the outcomes feeding the use...
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#2Fabio L. VerdiH-Index: 9
Last.Stuart Clayman (UCL: University College London)H-Index: 15
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Cloud network slicing can be defined as the process that enables isolated end-to-end and on-demand networking abstractions, which: (a) contain both cloud and network resources, and (b) are independently controlled, managed and orchestrated. This paper contributes to the vision of the NECOS project and relevant platform, that aim to address the limitations of current cloud computing infrastructures to accomplish the challenging requirements of the slicing approach. The NECOS platform implements t...
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#1Polychronis Valsamas (UoM: University of Macedonia)
#2Ilias Sakellariou (UoM: University of Macedonia)H-Index: 7
Last.Lefteris Mamatas (UoM: University of Macedonia)H-Index: 14
view all 4 authors...
5G networks are considered as a main enabler for new services for Media & Entertainment (ME (ii) dynamic resource discovery and allocation residing at both federated open-access and local test-beds; and (iii) experimentation with modular media service orchestration mechanisms, e.g., on content caching and service elasticity. We provide proof-of-concept results demonstrating content provisioning over allocated slices and dynamic resource discovery involving European and USA test-beds, where heter...
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#1Lefteris MamatasH-Index: 14
Last.Vassilios TsaoussidisH-Index: 20
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#2Sophia G. PetridouH-Index: 10
Last.Lefteris MamatasH-Index: 14
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The Routing over Low Power and Lossy Networks (RPL) protocol is an important standardized routing solution for the Internet of Things (IoT), characterized by significant benefits, including IPv6 support and efficient low-power operation over noisy channels, especially for many-to-one communication scenarios (i.e., a set of deployed devices gathering periodic measurements destined to a single sink node). However, the RPL faces performance issues in networks with mobility or point-to-point communi...
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#1Sotiris SkaperasH-Index: 1
#2Lefteris MamatasH-Index: 14
Last.Arsenia ChortiH-Index: 12
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Dec 1, 2018 in GLOBECOM (Global Communications Conference)
#1George E. Violettas (UoM: University of Macedonia)H-Index: 3
#2Sophia G. Petridou (UoM: University of Macedonia)H-Index: 10
Last.Lefteris Mamatas (UoM: University of Macedonia)H-Index: 14
view all 3 authors...
Being part of the Internet of Things (IoT), the Wireless Sensor Networks (WSNs) inherit characteristics such as large-scale deployment, dynamicity, heterogeneity and mobility. These aspects mandate elasticity in many network functions and especially in routing. The IPv6 Routing Protocol for Low-Power and Lossy Networks (RPL) is the state-of-the-art routing protocol for resource-constrained devices in environments with signal issues, but it was not designed to support mobility. However, mobility ...
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Dec 1, 2018 in GLOBECOM (Global Communications Conference)
#1Sotiris SkaperasH-Index: 1
#2Lefteris Mamatas (UoM: University of Macedonia)H-Index: 14
Last.Arsenia Chorti (Cergy-Pontoise University)H-Index: 12
view all 3 authors...
Video content is responsible for more than 70% of the global IP traffic. Consequently, it is important for content delivery infrastructures to rapidly detect and respond to changes in content popularity dynamics. For flexible and highly adaptive solutions, the capability for a quick response should be driven from early (real-time) and low-complexity content popularity detection schemes. In this paper, we focus on the early and low-complexity detection of video content popularity, which we addres...
1 CitationsSource
#1Efthymios Koutsogiannis (DUTH: Democritus University of Thrace)H-Index: 4
#2Lefteris Mamatas (UoM: University of Macedonia)H-Index: 14
Last.Vassilios Tsaoussidis (DUTH: Democritus University of Thrace)H-Index: 20
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We study opportunistic forwarding in a community-based networking paradigm where mobile users and shared access points (SAPs) collectively provide Internet access to users (mobile or not), including those in areas where other connectivity options are not available. Our approach is based on an efficient interoperation of two challenging network types: the opportunistic and the user-provided networks (UPNs). This requires a re-evaluation of the existing assumptions regarding inter-contact patterns...
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