Search results for " Gateway"
showing 9 items of 49 documents
Report WS6: Immigration and new inhabitants in the Gateway Cities
2012
It is in the last years that the planning discipline has fully recognized immigration issues as decisive for their role both in the urban studies and in the policy design. Nowadays, in Italy and Europe, the shifting social composition of the cities asks the planner for new cognitive instruments and new strategies for the interventions on urban systems. The present report resumes the results of the workshop “Immigration and new inhabitants in the gateway cities” which took place inside the IX Biennial of Towns and Town Planners of Europe, held in Genoa in September 2011. In the two days of debate, a number of Italian and European examples has been presented: the report underlines three issue…
Measurement and Modeling of the Origins of Starvation of Congestion-Controlled Flows in Wireless Mesh Networks
2009
Significant progress has been made in understanding the behavior of TCP and congestion-controlled traffic over CSMA-based multihop wireless networks. Despite these advances, however, no prior work identified severe throughput imbalances in the basic scenario of mesh networks, in which a one-hop flow contends with a two-hop flow for gateway access. In this paper, we demonstrate via real network measurements, testbed experiments, and an analytical model that starvation exists in such a scenario; i.e., the one-hop flow receives most of the bandwidth, while the two-hop flow starves. Our analytical model yields a solution consisting of a simple contention window policy that can be implemented vi…
Fast Secure Routing for Highly Mobile Large-Scale Ad-Hoc Vehicular Networks
2009
In highly mobile large-scale vehicular ad-hoc networks, routing protocols must be fast and efficient in terms of low routing discovery delay and communication overhead to support the applications such as car talk. Such requirement becomes more difficult to achieve when inducing security enhancement to tackle the authentication of routing messages. In this paper, we propose a lightweight (fast) secure routing protocol, Secure Proactive Tree-based Routing (SPTR) to hit these two points. SPTR makes use of the characteristics of VANET networks, that is, the traffic originates from or terminates at the gateway or road side unit. SPRT also takes advantages of certificate-less ID-based cryptograph…
Multipath extensions to the DYMO routing protocol
2007
Multipath routing is a technique that can improve performance, specially in mobile ad hoc networks. Due to traffic dispersion it can perform load balancing; minimize the energy consumed by nodes or prevent traffic analysis. In this work we focus on enhancing the DYMO protocol to support multipath routing. We study the impact of traffic dispersion on both UDP and TCP traffic when varying a set of parameters.
A feasibility analysis on the use of ultrasonic multihop communications for E-health applications
2017
Rise in population aging as well as diffusion of chronic diseases and health consciousness require constant monitoring of health conditions but also lead to increasing costs for the governments. Body Area Networks represent the next frontier in health care and are envisaged as the natural choice to provide detailed and updated information on health status to prevent health risks and diseases. However if, on the one hand, a large research effort has been devoted so far to the investigation of BAN communications on and around the body, on the other hand intra-BAN communications are still a scarcely explored area because of the difficulties and risks in successfully propagating signals inside …
Blockchain based Inter-domain Latency Aware Routing Proposal in Software Defined Network
2018
Border gateway protocol (BGP) version 4 is routing current Internet for more than 20 years. BGP is the only protocol that has proven its routing capability of such size network with continually growing nature. Although BGP is scalable and network layer reachability information it lacks quality of service metrics like latency. BGP routing decision algorithm uses as-path length between autonomous systems (AS) as main factor for most of its best-path calculations. Because of more affordable peering architectures as-path length is generally decreasing in worldwide internet network resulting in less efficient routes for real-time internet protocol traffic. This study proposes future internet arc…
Sistemi urbani in transizione: la crisi, gli effetti, le visioni
2013
Considerando le città i luoghi in cui si territorializzano le dinamiche globali e in cui avviene l’integrazione tra locale e globale, si propone un nuovo modello di sviluppo e di governo delle città, con l’obiettivo di riconfigurare il territorio per creare spazi competitivi multi-livello in cui i territori possono interagire e relazionarsi, dove il paradigma della “rete” diventa il modo con cui interpretare e intercettare la nuova logica spaziale dei flussi. Partendo dal modello insediativo policentrico e applicando il concetto del poly-decentricity, si propone un “modello di policentrismo reticolare multi-livello”, che intreccia le potenzialità di un territorio policentrico funzionalmente…
Policentrismo reticolare. Teorie, approcci e modelli per lo sviluppo territoriale
2019
L’attuale fase di transizione in cui si trovano oggi i territori e le città, conseguente alle dinamiche della globalizzazione, dell’economia mondiale, della società in rete e del nascente capitalismo delle reti, sta producendo effetti sui sistemi organizzativi della vita sociale e relazionale che chiedono risposte in merito all’organizzazione fisica, funzionale e gestionale del sistema urbano e territoriale. In uno scenario in cui le connessioni e le relazioni si sganciano dalle distanze spazio-temporali, la città torna a essere un luogo denso di importanza. In essa si può ritrovare quella dimensione territoriale necessaria a integrare i contesti locali con l’immaterialità globale, riproget…
La territorialità delle dinamiche spazio-temporali della società “rete”
2015
Oggi le città si trovano in una fase di transizione a causa degli effetti delle dinamiche della globalizzazione, dell’economia mondiale, della società in rete e di un nascente capitalismo delle reti. In uno scenario in cui le connessioni e le relazioni, soprattutto quelle economiche e sociali, si sganciano dalle distanze spazio-temporali, la città torna ad essere un luogo denso di importanza perché in essa si può ritrovare quella dimensione territoriale necessaria ad integrare i contesti locali con l’immaterialità globale, riprogettando uno spazio dove nuove configurazioni territoriali, quali le regioni urbane e le gateway cities - grandi hubs di relazioni intersettoriali e multidimensional…