BOLLA , Raffaele

Recent technological advances provide an excellent opportunity to achieve truly effective results in the field of open Internet devices, also known as Open Routers or ORs. Even though some initiatives have been undertaken over the last few years to investigate ORs and related topics, other extensive areas still require additional investigation....

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In this paper, we introduce a modeling framework based on the fluid flow approximation, which can be effectively applied to high-end nodes for transport/core networks. Our proposal starts from a detailed analysis and considerations on state-of-the-art network device architectures and QoS traffic descriptors. In more detail, the model explicitly...

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Mobile communications are widespread in a large part of industrialized countries and cellular networks, by which mobile radio-communications are supported, can give directly or potentially a huge amount of frequently updated information on the position of their users. This information can be used to estimate on-line the traffic conditions of...

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In this paper, our main objective is to explore how Linux Software Routers (SRs) can deploy advanced and flexible paradigms for supporting novel control-plane functionalities and applications. To this end, we investigate and study a new open-source software (SW) framework: the Distributed SW ROuter Project (DROP), which aims to develop and...

Advances in wireless communications have driven an interest towards ubiquitous computing environments for nomadic users. This has led to a more user-centric vision of the network and to the concept of personal network: the user exploits his personal devices (both local and remote) and those in the surrounding environment to build dynamic ad hoc...

2007 IEEE Workshop on High Performance Switching and Routing, HPSR 2007, Article number 4281242, Pages 82-87 2007 IEEE Workshop on High Performance Switching and Routing, HPSR; Brooklyn, NY; United States; 30 May 2007 through 1 June 2007; Category number07EX1775C; Code 72703 The IP lookup mechanism in a Linux software router: Performance...

A cellular wireless network is considered, where multi-class call admission control is exerted locally in a number of cells. Cells are in turn organized into clusters, which play the role of a higher hierarchical control level. The whole capacity (in number of channels) available in a cluster is distributed among its cells, according to...

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Scarceness of bandwidth is a common problem to all radio networks. The cellular structure with frequency reuse has been the solution for many years in the past; however, decreasing cell sizes results in increasing handoff requests and this could be critical in high mobility environments. Moreover, the cellular structure cannot ensure the best...

Recent technological advances provide an excellent opportunity to achieve truly effective results in the field of open Internet devices based on PC COTS Hardware, also known as Open Routers. In this environment, new interesting research topics, like parallel computing optimization, are related to the rapid migration of CPU architectures to the...

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Despite high potential and flexibility in developing new functionalities and mechanisms, as well as the availability of wellestablished networking SW, common criticism of Software Routers, based on COTS HW elements and open-source SW, is mainly focused on performance, especially for issues concerning the data plane. In this respect, our...

access multiplexer is considered, serving a TDM output channel with a hybrid structure, characterized by the presence of both isochronous (circuit-switched) and asynchronous (packet-switched) traffic. The isochronous traffic is, in turn, subdivided into several classes, which are distinguished according to their speed, in order to model a...

Recent technological advances give a good chance to do something really effective in the field of open Internet equipments, also called Open Routers (ORs). Some initiatives have been activated since the last few years to investigate the OR and related issues. But despite these activities, large interesting areas still require a deeper...

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The convergence towards the IP protocol has made Internet access available almost everywhere; this has leveraged new expectations about continuous and seamless communication, especially when portable devices are involved. Mobility management is a key issue in this context. The original IP specification does not account for mobility....

Wireless communications have always faced the scarceness of bandwidth and until today the cellular division has solved this problem by making radio cells always smaller. However, as cell size is reduced, more users will probably require handoffs, and signaling can overload the system. Further, the decrease in cell dimension cannot ensure the...

In this paper, we consider energy-aware network devices (e.g. routers, switches, etc.) able to trade their energy consumption for packet forwarding performance by means of both low power idle and adaptive rate schemes. We focus on state-of-the-art packet processing engines, which generally represent the most energy-starving components of...