Fikru Getachew Debele

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The past years have witnessed a significant increase in the number of WLANs deployed in most of the enterprises, campuses and public areas to provide high-speed Internet connectivity. These WLANs typically consist of APs densely installed to assure enough capacity to meet users demand during the peak period of activity. At the same time, it translates into(More)
A multi-stage software router overcomes scalability issues related to a single, PC-based, software router by introducing parallel forwarding paths. However, since the architecture includes different internal components, energy inefficiency at low loads may arise if the multi-stage internal architecture does not adapt to currently offered traffic. This paper(More)
We focus on a distributed multi-stage software router (MSSR) architecture internally composed by several personal computers (PCs) to overcome scalability and performance issues of software routers (SRs) based on a single PC. Sizing the internal architecture to sustain the peak load may lead to power inefficiency at low loads. This paper presents a power(More)
Multi-stage software router architectures permit to overcome several limitations of single-stage software routers, allowing to expand the number of available interfaces and to increase the overall throughput. However, a multi-stage software router, despite being composed by several internal elements, must externally appear as a single device. A control(More)
WLAN becomes a necessary facility for exible Internet provisioning in enterprise networks. Usually this connection provisioning is designed to handle a peak load with high density of Access Points (APs) to guarantee a desired level of quality of service (QoS). This design approach however leads to energy inefficiency due to the daily demand variability. In(More)
A distributed multistage software router (MSSR) is composed by several interconnected software routers running on personal computers (PCs). The MSSR architecture overcomes scalability and performance issues of single software router by providing parallel forwarding paths. Like many networking devices, a MSSR must be sized for peak traffic load, which(More)
Smartphones and other connected devices rely on data services, such as web services (WS) and Google Cloud Messaging (GCM), to share the information they collect or use. Traditionally, these services were classified according to their efficiency or their delivery time, but, when dealing with battery operated devices, another important parameter is the power(More)
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