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The 2013 10th Annual Conference on Wireless On-demand Network Systems and Services (WONS) took place March 18-20, 2013 in Banff, Canada. Copyright and Reprint Permission: Abstracting is permitted with credit to the source. Libraries are permitted to photocopy beyond the limit of US copyright law for private use of patrons those articles in this volume t hat carry a code at the bottom of t he f irst...
Real-time path planning is one of emergent approaches which efficiently reduce traffic jam in urban scenarios. Designing an efficient path planning strategy to achieve optimal vehicle-traffic flow control still remains a challenging problem, especially when we take human's uncooperative and uncoordinated selfish behaviors into consideration. In this paper, we first introduce an intelligent transportation...
For smart traffic scenarios, communication between traffic participants is of high importance. Classical approaches (e.g. for information about congestions) employ a server-based architecture, which raises scalability and privacy concerns. In this paper, we propose OverDrive, a decentralized overlay-based geocast service that is applicable in smart traffic scenarios and not prone to the shortcomings...
Wireless communication between vehicles is protected by digital certificates but these certificates and related identifiers must not be usable to track vehicles. Therefore, short-term pseudonymous certificates are applied and regularly changed in order to protect the driver's privacy. But in well defined situations, e.g. network attacks or traffic accidents, it should be possible to retrieve the appropriate...
In competitive autonomic networking environments, user nodes face a strategic dilemma: on the one hand, they need to cooperate to support the networking infrastructure and information flow; on the other hand they are tempted not to do so, e.g., in order to conserve own system resources or create an advantage for themselves. In this paper we investigate a real-world scenario of parking assistance service...
Community urban sensing is one of the emerging applications enabled by the growing popularity of mobile user devices, like smartphones and in-vehicle monitoring systems. Such devices feature sensing and wireless communication capabilities, which enable them to sample large-scale phenomena, like air pollution and vehicular traffic congestion, and upload these data to the Internet. In this work, we...
Mobile Vehicular Clouds are emerging as systems architectures suitable to provide services to both drivers and external customers. The paper describes a Pics-on-Wheel architecture and prototype implementation based on the idea of open mobile cloud. A simulation study based on San Francisco taxi cab traces shows that the Pics-on-Wheel service yields latencies in the order of 5 minutes in well frequented...
In monitoring scenarios, Wireless Sensor Networks commonly transmit measurements from a large number of sensor nodes to a central data sink. This communication pattern is known as concast. Different approaches have been proposed to improve the energy-efficiency of concast and thus the lifetime of the WSN. However, energy-efficiency evaluations that are close to reality are missing. This paper systematically...
In this paper, we investigate the feasibility of linking amateur weather ballooning, amateur radio, and emergency communications for the purpose of creating low-cost, easily-reproducible emergency Deployable Aerial Communications Architecture (DACA). Amateur radio and other line-of-sight communications are already widely used during disaster relief, so the vision of our work is to explore to what...
In Delay-Tolerant Networks (DTN), individual nodes with much higher rates of sending new bundles than average can degrade the delivery rate of other nodes substantially. They have a much higher impact on the overall network fairness than in traditional networks because of DTN — specific properties, such as decentralized design and the store-and-forward approach. Authenticated resource management schemes...
A distributed multiuser MIMO system consists of several access points which are connected to coordinating servers and operate as a large multi-antenna access point. Thanks to joint decoding and precoding, all transmitted signal power is useful, rather than “interference”. The system has the potential to support constant rates as the number of clients increases, thus offering a tremendous bandwidth...
Multicast video streaming is experiencing a significant growth in wireless networks thanks to the resources provided by 4G/LTE and WiFi services. However, wireless communications are affected by attenuation, shadowing, fading, and unpredictable interference, that make multicast services extremely difficult (no ARQ). Nodes close to the streaming source (e.g., a node or an AP), however, always experience...
In cognitive radio systems, the primary user location and transmit power are valuable information in order to create an efficient secondary network that uses spatial spectrum holes without introducing interference to the primary users. Since primary users cannot be assumed to cooperate, their locations and transmit powers need to be estimated at the secondary users. Existing localization techniques,...
This paper describes a few aspects of the work that led to the first experiments ever carried out on the road with an accident warning system based on vehicle-to-vehicle (V2V) communications. The mentioned experiments were performed in Los Angeles as part of a collaboration project between two teams, one from the University of Bologna and one from UCLA. In essence, driving along a few of the most...
Vehicular networks offer service coverage for urban environments that would otherwise be too expensive for infrastructure-based networks to provide. While many services have already been proposed based on collaboration between moving cars, the inclusion of parked cars in these systems extends their reach, coverage and stability. However, despite the presence of a large car battery, cars still suffer...
This paper investigates a novel solution for efficiently broadcasting in vehicular networks. In high congested traffic scenarios, one of the most serious problems is the increase of packet collisions and medium contentions among vehicles which attempt to communicate. The effect results in a very high number of message copies and collisions within the vehicular network, which is sometimes called as...
A key task in Wireless Sensor Networks (WSNs) is to deliver specific information about a spatial phenomenon of interest. To this end, a few Sensor Nodes (SNs) sample the phenomenon and transmit the acquired samples, typically multihop, to the application through a gateway called sink. Many applications require the spatial sampling to be accurate and the delivery to be reliable. However, providing...
In this paper we explore the interplay of node density, mobility and cooperation in routing decisions for mobile networks. Specifically, routing is based on a novel metric that jointly accounts for all three aforementioned attributes and helps identify the most promising venue available for getting the message closer/faster to the destination, even in dynamically changing environments. The effectiveness...
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