When mobile services go local

Borsetti, Diego; Fiore, Marco; Casetti, Claudio; Chiasserini, Carla-Fabiana

doi:10.1145/1641804.1641845

Cited by 7 publications

(8 citation statements)

References 11 publications

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“…Then, we show how such an infrastructure-less solution can maintain the content within the RoI that has been reached. Preliminary results on these aspects can also be found in an early version of our study [13].…”

Section: Supporting Broadcasting: Driving and Maintaining The Infomentioning

confidence: 71%

“…The overall lingering index is plotted in Fig. 1 as a function of the distance from the target, for the four boundary combinations of θ and v values (plots presenting the different contributions to the index can be found in [13]). Note that it takes values in the interval (−∞, 1] and, consistently with our initial requirements, it exhibits the following properties:…”

Section: A the Lingering Indexmentioning

confidence: 99%

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Persistent Localized Broadcasting in VANETs

Fiore

Casetti

Chiasserini

et al. 2013

IEEE J. Select. Areas Commun.

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We present a communication protocol, called LINGER, for persistent dissemination of delay-tolerant information to vehicular users, within a geographical area of interest. The goal of LINGER is to dispatch and confine information in localized areas of a mobile network with minimal protocol overhead and without requiring knowledge of the vehicles' routes or destinations. LINGER does not require roadside infrastructure support: it selects mobile nodes in a distributed, cooperative way and lets them act as "information bearers", providing uninterrupted information availability within a desired region. We analyze the performance of our dissemination mechanism through extensive simulations, in complex vehicular scenarios with realistic node mobility. The results demonstrate that LINGER represents a viable, appealing alternative to infrastructure-based solutions, as it can successfully drive the information toward a region of interest from a far away source and keep it local with negligible overhead. We show the effectiveness of such an approach in the support of localized broadcasting, in terms of both percentage of informed vehicles and information delivery delay, and we compare its performance to that of a dedicated, state-of-the-art protocol.

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Section: Supporting Broadcasting: Driving and Maintaining The Infomentioning

confidence: 71%

Section: A the Lingering Indexmentioning

confidence: 99%

Persistent Localized Broadcasting in VANETs

Fiore

Casetti

Chiasserini

et al. 2013

IEEE J. Select. Areas Commun.

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“…Such a procedure is initiated when the source node generates a "sampling kit", in the form of a data packet including the target location and the radius R A , the map of the road topology inside the target area, and the different parameters driving the sampling process. The sampling kit is then transferred to the target area by means of a geocasting routing protocol [9]. The first vehicle in the target area receiving the sampling kit becomes the Sampler.…”

Section: System Modelmentioning

confidence: 99%

“…In each simulation, the sampling kit is generated by a source randomly located over the road topology, and it is given an estimation period T equal to either 3 or 15 minutes. The geocasting technique we use to route the sampling kit toward the target area is the scheme in [9]. Also, we set the target area radius to R A = 200 m.…”

Section: Performance Evaluationmentioning

confidence: 99%

MobSampling: V2V Communications for Traffic Density Estimation

Garelli

Casetti

Chiasserini

et al. 2011

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)

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We propose a fully-distributed approach to the online estimation of vehicle traffic density. Our approach envisions vehicles communicating within a VANET and cooperating to collect density measurements through a uniform sampling of the road sections of interest. The proposed scheme does not require the presence of any network infrastructure, central controller or devices triggered by the passage of vehicles, and it is suitable for both highway and urban environments. Results derived through ns-2 simulations in realistic mobility scenarios show that our solution is very effective, providing accurate, on-line estimates of the traffic density with minimal protocol overhead.

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“…Once a number of acknowledgments are received, vehicle 1 will automatically evaluate a set of parameters such as speed, direction and distance to be able to select potential participants. At the application level this can be achieve by implementing approaches such as the one described in (Borsetti et al, 2009) 3. On selection, queries will be inserted and forwarded by the members of the group following an order determined by a hash function, in order to prevent strategic ordering of vehicles and therefore avoiding collusion attacks.…”

Section: Group Query Communicationmentioning

confidence: 99%

A trust-driven privacy architecture for vehicular ad-hoc networks

Serna-Olvera

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Vehicular Ad-Hoc NETworks (VANETs) are an emerging technology which aims to improve road safety by preventing and reducing traffic accidents. While VANETs offer a great variety of promising applications, such as, safety-related and infotainment applications, they remain a number of security and privacy related research challenges that must be addressed. A common approach to security issues widely adopted in VANETs is the use of Public Key Infrastructures (PKI) and digital certificates in order to enable authentication, authorization and confidentiality. These approaches usually rely on a large set of regional Certification Authorities (CAs). Despite the advantages of PKI-based approaches, there are two main problems that arise, i) the secure interoperability among the different and usually unknown- issuing CAs, and ii) the sole use of PKI in a VANET environment cannot prevent privacy related attacks, such as, linking a vehicle with an identifier, tracking vehicles ¿big brother scenario" and user profiling. Additionally, since vehicles in VANETs will be able to store great amounts of information including private information, unauthorized access to such information should be carefully considered. This thesis addresses authentication and interoperability issues in vehicular communications, considering an inter-regional scenario where mutual authentication between nodes is needed. To provide interoperability between vehicles and services among different domains, an Inter-domain Authentication System (AS) is proposed. The AS supplies vehicles with a trusted set of authentication credentials by implementing a near real-time certificate status service. The proposed AS also implements a mechanism to quantitatively evaluate the trust level of a CA, in order to decide on-the-y if an interoperability relationship can be created. This research work also contributes with a Privacy Enhancing Model (PEM) to deal with important privacy issues in VANETs. The PEM consists of two PKI-based privacy protocols: i) the Attribute-Based Privacy (ABP) protocol, and ii) the Anonymous Information Retrieval (AIR) protocol. The ABP introduces Attribute-Based Credentials (ABC) to provide conditional anonymity and minimal information disclosure, which overcome with the privacy issues related to linkability (linking a vehicle with an identifier) and vehicle tracking (big brother scenario). The AIR protocol addresses user profiling when querying Service Providers (SPs), by relying in a user collaboration privacy protocol based on query forgery and permutation; and assuming that neither participant nodes nor SPs could be completely trusted. Finally, the Trust Validation Model (TVM) is proposed. The TVM supports decision making by evaluating entities trust based on context information, in order to provide i) access control to driver and vehicle's private information, and ii) public information trust validation.

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When mobile services go local

Cited by 7 publications

References 11 publications

Persistent Localized Broadcasting in VANETs

Persistent Localized Broadcasting in VANETs

MobSampling: V2V Communications for Traffic Density Estimation

A trust-driven privacy architecture for vehicular ad-hoc networks

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