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—In this contribution we address the problem of using cellular network signaling for inferring real-time road traffic information. We survey and categorize the approaches that have been proposed in the literature for a cellular-based road monitoring system and identify advantages and limitations. We outline a unified framework that encompasses UMTS and GPRS(More)
Several scientific works have considered the possibility to build Wireless Mesh Networks (WMN) using multi-channel IEEE 802.11 architectures. At the basis of these works is the notion of " non-overlapping " channels, i.e. with a frequency separation equal or greater than 25MHz. It is now a common assumption that multiple independent transmissions over these(More)
—Future intelligent transportation systems (ITS) will necessitate wireless vehicle-to-infrastructure (V2I) communications. This wireless link can be implemented by several technologies , such as digital broadcasting, cellular communication, or dedicated short range communication (DSRC) systems. Analyses of the coverage and capacity requirements are(More)
—In this paper we present a road traffic estimation system built on top of the cellular network infrastructure. Based on the concept that many road users are also customers of a cellular operator, we show that specific road conditions map to certain signaling patterns in the cellular core network. In order to estimate the road traffic, signaling is(More)
—In this work we explore the feasibility of implementing infrastructure-to-vehicle (I2V) communication through the UMTS infrastructure. We identify the problems that arise when providing I2V services on top of legacy UMTS networks as conceived in 3GPP Release 5 and consider an I2V architecture that exploits a new feature introduced by 3GPP Release 6, namely(More)
Road traffic can be monitored by means of static sensors and derived from floating car data, i.e., reports from a sub-set of vehicles. These approaches suffer from a number of technical and economical limitations. Alternatively, we propose to leverage the mobile cellular network as a ubiquitous mobility sensor. We show how vehicle travel times and road(More)
Millions of mobile users daily traveling on urban roads and highways The cellular network signaling traffic is rich of information related to the movement of devices across cell and Location Areas boundaries Our goal: use mobile devices and their signaling as traffic sensors for both real-time applications and historical analysis © FTW-2/13
— This paper focuses on the analysis of carrier sensing mechanisms adopted by the 802.11 medium access control. Through an analytical study, a mechanism to dynamically set the Carrier Sensing Range is presented. The mechanism improves the spatial reuse by avoiding the interference of neighbor nodes. Simulation results show that setting the Carrier Sensing(More)