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The recent technological advances related to computing, storage, cloud, networking and the unstoppable deployment of end-user devices, are all coining the so-called Internet of Things (IoT). IoT embraces a wide set of heterogeneous services in highly impacting societal sectors, such as Healthcare, Smart Transportation or Media delivery, all of them posing a diverse set of requirements, including real...
The viral and dense deployment of small cell base stations (SBSs) will lie at the heart of 5G cellular networks. However, such dense networks can consume a significant amount of energy. In order to reduce the network's reliance on unsustainable energy sources, one can deploy self-powered SBSs that rely solely on energy harvesting. Due to the uncertainty of energy arrival and the finite capacity of...
In emerging cellular systems, optical fronthaul is expected to play a major role to support many control operations, e.g., Coordinated Multipoint (CoMP). CoMP is a promising technique for interference mitigation as it can transform interfing signals into joint transmission (reception) in which signals from adjacent cell sites are simultaneously transmitted (received) to (from) mobile terminals. But...
The recently-proposed centralized cloud radio access network (C-RAN) promises to deal with the ever-increasing traffic volume and reduce network cost by centralizing the baseband operation and simplifying radio access points. However, compared with traditional radio access network, whether it always has performance gain, and how large the gain will be are still open questions. This paper presents...
We design and analyze optical data link layer protocols for data center networks. Specifically, we compare the delay performance of an Ethernet only architecture and a hybrid flow architecture. The need of a new architecture becomes apparent as data centers scale to support increasing data volume. The bursty and large volume of data introduced by “elephant” flows, flows composed of 100s to 1000s of...
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