Andrea Ghittino

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This paper presents a route management protocol for multi-homed infrastructured WMNs aiming to preserve active sessions of mobile nodes. Every mesh access point (MAP) has at least one MAP interface configured as a traditional AP and another one dedicated to the WMN backhaul. The clients are mesh-unaware to avoid installing special software on them. We(More)
Among several first mile solutions proposed so far, the key advantage of the IEEE 802.16 standard, widely known as WiMAX, is to ensure large area coverage and rather inexpensive equipment at the subscriber side. Modern requirements to wireless connectivity include mandatory QoS guarantees for a wide set of real-time applications: this is the case of the(More)
In this paper, we address the problem of Quality of Service (QoS) support in the current generation of IEEE 802.11 WLANs. We propose and investigate a novel approach, called Host Qs, aiming at LLC-layer differentiation of traffic depending on its QoS requirements. The approach is based on creating one LLC queue for each traffic category and on scheduling(More)
We address the joint problem of traffic routing and mobility support in wireless mesh networks that are built by many fixed nodes and few mobile nodes. We focus on a vehicular setting, where buses or streetcars connect to different fixed mesh nodes as they move in a urban environment. First, through simulation we identify the best candidate for routing(More)
Mobile ad hoc networking allows the development of several infrastructure free applications. One of the arguments we focused on is the possibility of deploying a set of services in areas lacking of low-cost and wide band connectivity to Internet, as rural or mountain communities. The main idea is that it is possible to transfer data by mobile vehicles such(More)
Vehicular networks are expected to support both safety and non-safety applications, through Dedicated Short Range Communications (DSRC) in 5-GHz bands. These channels, however, are of limited capacity and recent studies have high-lighted their scarcity, in comparison to the broad range of services that are envisioned in vehicular networks. We therefore(More)
In this paper we described UbiquiTO, an agent-based system that acts as an expert tourist guide for mobile users, providing different information according to the device, the user and the context. The system uses feedbacks coming from localization to acquire the knowledge required to provide location-based services and to update the user model.
Evaluating the available bandwidth in a wireless LAN is a challenging task because the throughput depends on several factors such as RSSI (Received Signal Strength Indication), interferers and packet size. Moreover, in a real scenario it is not sufficient to evaluate periodically the throughput of the network, but a continuous monitoring is required in(More)
More in general, DTT is a technology that allows to use TV frequencies for the realization of new telematic networks typologies, broadcast oriented, with pervasive and broadband territorial coverage. In fact DTT enables to regionalize the transmissions offering local structures, such as PAs (Public Administrations), the unique possibility to grant the(More)