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Steering with Eyes Closed: Millimeter Wave Beam Steering without In-Band Measurement

Spectrum scarcity and ever increasing densities of wireless network deployments have recently led to an opening of the 60 GHz millimeter-wave bands for unlicensed communication. In contrast to the previously used ISM bands below 5 GHz, a massive amount of 6-9 GHz of bandwidth is available at these frequencies. Usage of these resources is considered for wireless LAN and 5G cellular networks and with the ratification of the IEEE 802.11ad standard in December 2012, wireless LAN is about to bring millimeter-wave communication to the commercial market.

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PhD Thesis defense: Economics of Internet Interdomain Interconnections

The Internet is an evolving ecosystem where a multitude of interconnected networks, or Autonomous Systems (ASes), support global connectivity of end users. 

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Patrolling by faulty robots

Mobile robots collaborate in order to solve efficiently the central problems in algorithmics of distributed computing like searching/exploration, rendez-vous or pattern formation.

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RoCoCo: Receiver-initiated Opportunistic Data Collection and Command Multicasting for WSNs

Many data collection protocols have been proposed to cater for the energy-efficient flow of sensor data from distributed sources to a sink node. However, the transmission of control commands from the sink to one or only a small set of nodes in the network is generally unsupported by these protocols.

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Route Bazaar: Automatic Interdomain Contract Negotiation

While some see in Border Gateway Protocol (BGP) a routing ambrosia to be enshrined, others perceive a basis of serious Internet connectivity limitations. Because the interdomain routing protocol realizes contracts between Autonomous Systems (ASes), this paper argues that contractual and routing issues need to be tackled jointly to overcome the connectivity limitations. We propose Route Bazaar, a backward-compatible system for flexible Internet connectivity. Inspired by the decentralized construction of trust in cryptocurrencies, Route Bazaar uses a decentralized public ledger and cryptography to provide ASes with automatic means to form, establish, and verify end-to-end connectivity agreements.

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Towards Preventive Safety Systems for Cars: The Impact of Driving Habits in Accident Prediction

The impact of car accidents in human lives calls for a profound understanding of accident risk. However, the unpredictability of accidents and the unfeasibility of their reproduction make it difficult to identify the causes and patterns underlying individual accidents.

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Floating Band D2D: Exploring and Exploiting the Potentials of Adaptive D2D-enabled Networks

In this paper, we propose Floating Band D2D, an adaptive framework to exploit the full potential of Device-to-Device (D2D) transmission modes.

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Lightweight Mobile Bandwidth Availability Measurement

Mobile data traffic is increasing rapidly and wire- less spectrum is becoming a more and more scarce resource. 

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Challenge: Resolving data center power bill disputes: the energy-performance trade-offs of consolidation

In this paper we challenge the common evaluation practices used for Virtual Machine (VM) consolidation, such as simulation and small testbeds, which fail to capture the fundamental trade-off between energy consumption and performance. We identify a number of over-simplifying assumptions which are typically made about the energy consumption and performance characteristics of modern networked systems.

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The Routing Continuum in Wireless Sensor Networks

Traditional distance vector routing and efficient flooding-based routing can be considered the two ends of the routing continuum in wireless sensor networks. The former uses a graph metaphor to find the best paths between the end-points in a network.

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