Publications

NITOS Energy Monitoring Framework: Real time Power Monitoring in Experimental Wireless Network Deployments

Authors: Stratos Keranidis, Giannis Kazdaridis, Virgilios Passas, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas

Journal: ACM Mobile Computing and Communications Review (MC2R), Special issue, January 2014

Development of energy-efficient protocols and algorithms requires in-depth understanding of the power consumption characteristics of real world devices. To this aim, energy efficiency analysis is performed by the research community, mainly focusing on the development of power consumption models. However, recent studies have highlighted the inability of existing models to accurately estimate energy consumption even in non-composite scenarios, where the operation of a single device is analyzed. The inability of such models is further highlighted under real life scenarios, where the impact induced by the simultaneous operation of several devices renders the application of traditional models completely inappropriate. As a result, energy efficiency evaluation under complex configurations and topologies, needs to be experimentally investigated through the application of online monitoring solutions. In this work, we propose the innovative NITOS Energy consumption Monitoring Framework (EMF) able to support online monitoring of energy expenditure, along with the experiment execution. The developed framework is built on a distributed network of low-cost, but highly accurate devices and is fully integrated with the large-scale wireless NITOS testbed. Framework evaluation is performed under both low-level experiments that demonstrate the platform’s high-level accuracy, as well as through high-level experiments that showcase how online and distributed monitoring can facilitate energy performance assessment of realistic testbed experiments.

Download paper: Keranidis_NITOS_EMF_MC2R_2014.pdf

CONTENT Project: Considerations towards a Cloud-based Internetworking Paradigm

Authors: Kostas Katsalis, Thanasis Korakis, Giada Landi, Giacomo Bernini, Bijan R. Rofoee, Shuping Peng, Markos Anastasopoulos, Anna Tzanakaki, Dora Christofi, Michael Georgiades, Renaud Larsen, Jordi Ferrer Riera, Eduard Escalona, Joan A. Garcia-Espin,

Conference: Software Defined Networks for Future Nerworks and Services (SDN4FNS) IEEE, 2013

Although cloud computing and the Software Defined Network (SDN) framework are fundamentally changing the way we think about network services, multi-domain and multitechnology problems are not sufficiently investigated. These multidomain, end-to-end problems concern communication paths that span from the wireless access and the wireless backhaul networks to the IT resources through optical networks. In this paper we present the CONTENT project approach to network and infrastructure virtualization over heterogeneous, wireless and metro optical networks, that can be used to provide end-to-end cloud services. The project goal is to drive innovation across multi-technology infrastructures and allow ICT to be delivered and consumed as a service by Virtual Network Operators. The communication mechanics between wireless and optical domains and the physical layer abstractions of a CONTENT Virtual Network are presented and the relation of the proposed approach with the SDN framework is investigated.

Download paper: katsalis_CONTENT_SDN4FNS_2013.pdf

Demo: Online Evaluation of Sensing Characteristics for Radio Platforms in the CREW Federated Testbed

Authors: Virgilios Passas, Kostas Chounos, Stratos Keranidis, Wei Liu, Lieven Hollevoet, Thanasis Korakis, Iordanis Koutsopoulos, Ingrid Moerman, Leandros Tassiulas

Conference: MobiCom 2013, Miami, Florida, USA, September 2013

Cognitive radio systems have gathered a lot of research interest during the last decade. Accuracy of spectrum sensing and efficiency of free spectrum utilization are considered as the primary objectives in this emerging technology, which promises a boost in wireless network performance, through exploitation of underutilized licensed frequency bands. As the focus of researchers is usually on these two major challenges, other aspects have been in part underestimated. In this work, we consider two factors that are rather important for evaluation of cognitive platforms, namely sensing delay and energy efficiency. The first is related to the latency induced by the spectrum sensing process and its impact on sensing efficiency, which is tightly connected to both the QoS performance of secondary users and the protection of primary users. On the other hand, energy consumption is considered as a crucial issue in all types of wireless communications, due to restricted battery autonomy of mobile devices, as well as for moving towards “greener” solutions in telecommunications. Therefore, it is important to ex- tend existing testbed experimentation tools and develop new ones, in order to equip cognitive testbeds with such advanced monitoring capabilities. In this work, we present a monitoring procedure that has been directly integrated in the experimentation tools of the CREW testbed federation and demonstrate how it aids in the online evaluation of four different cognitive platforms in terms of the aforementioned metrics.

Download paper: CREW_Mobicom_2013_demo.pdf

Demo: Online Energy Consumption Monitoring of Wireless Testbed Infrastructure through the NITOS EMF Framework

Authors: Stratos Keranidis, Giannis Kazdaridis, Virgilios Passas, Thanasis Korakis, Iordanis Koutsopoulos, Leandros Tassiulas

Conference: WiNTECH - MobiCom 2013, Miami, Florida, USA, September 2013

Development of energy-efficient protocols and algorithms re- quires in-depth understanding of the power consumption characteristics of real world devices. To this aim, energy efficiency analysis is performed by the research community, mainly focusing on the development of power consumption models. However, recent studies [1] have highlighted the inability of existing models to accurately estimate energy consumption even in non-composite scenarios, where the operation of a single device is analyzed. In order to over- come the inability of such models, energy efficiency evaluation under complex configurations and topologies, should be experimentally investigated, using online energy monitoring solutions. In this work, we present the innovative NITOS Energy consumption Monitoring Framework (EMF) and demonstrate how online and distributed energy monitor- ing can facilitate energy performance assessment of realistic testbed experiments.

Download paper: Keranidis_NITOS_EMF_WinTECH_2013_demo.pdf

More Articles ...

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