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Lorenzo Keller

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Publications associées (26)

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MicroCast: Cooperative Video Streaming Using Cellular and Local Connections

Christina Fragouli, Lorenzo Keller

We consider a group of mobile users, within proximity of each other, who are interested in watching the same online video. The common practice today is that each user downloads the video independently on her mobile device using her own cellular connection, ...

Ieee-Inst Electrical Electronics Engineers Inc2016

System and method for cooperative data streaming

Christina Fragouli, Lorenzo Keller

A system and method for cooperative data streaming are disclosed. According to one embodiment, a system for cooperative data streaming comprises a group of devices comprising at least two devices, which are interested in obtaining the same content from the ...

2015

System and method for local multiplayer gaming

Christina Fragouli, Lorenzo Keller

A system and method for local multiplayer gaming are disclosed. According to one embodiment, a system comprises a plurality of mobile client devices including a mobile client device designated as a server device. Each mobile client device comprises a displ ...

2014

SenseCode: Network Coding for Reliable Sensor Networks

Christina Fragouli, Lorenzo Keller, Emre Atsan

Designing a communication protocol for sensor networks often involves obtaining the right trade-off between energy efficiency and end-to-end packet error rate. In this article, we show that network coding provides a means to elegantly balance these two goa ...

Assoc Computing Machinery2013

Function computation via subspace coding

Christina Fragouli, Lorenzo Keller, Nikhil Karamchandani

This paper considers function computation in a network where intermediate nodes perform randomized network coding, through appropriate choice of the subspace codebooks at the source nodes. Unlike traditional network coding for comput- ing functions, that r ...

2013

Low cost security for sensor networks

Christina Fragouli, Lorenzo Keller, Iris Safaka, Emre Atsan

We design and evaluate a lightweight encryption protocol suitable for sensor networks, that enables weak security in the presence of passive eavesdroppers. At every communication round, our protocol creates a key between each sensor node and the sink, by a ...

Institute of Electrical and Electronics Engineers Inc.2013

System and method for cooperative data streaming

Christina Fragouli, Lorenzo Keller

2013

MicroCast: Cooperative Video Streaming on Smartphones

Christina Fragouli, Lorenzo Keller

Video streaming is one of the increasingly popular, as well as de- manding, applications on smartphones today. In this paper, we con- sider a group of smartphone users, within proximity of each other, who are interested in watching the same video from the ...

2012

Building Wireless Network Coding Protocols

Lorenzo Keller

This work studies how to build wireless network protocols that achieve better reliability, lower delay and higher throughput than existing alternatives by using network coding and by exploiting the broadcast nature of the wireless channel. In the first par ...

EPFL2012

MicroPlay: A Networking Framework for Local Multiplayer Games

Christina Fragouli, Lorenzo Keller

Smartphones are an ideal platform for local multiplayer games, thanks to their computational and networking ca- pabilities as well as their popularity and portability. How- ever, existing game engines do not exploit the locality of players to improve game ...

2012