Kademlia: A Peer-to-Peer Information System Based on the XOR Metric
IPTPS '01 Revised Papers from the First International Workshop on Peer-to-Peer Systems
The Essence of P2P: A Reference Architecture for Overlay Networks
P2P '05 Proceedings of the Fifth IEEE International Conference on Peer-to-Peer Computing
Using a distributed quadtree index in peer-to-peer networks
The VLDB Journal — The International Journal on Very Large Data Bases
DTN routing as a resource allocation problem
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
Globase.KOM - A P2P Overlay for Fully Retrievable Location-based Search
P2P '07 Proceedings of the Seventh IEEE International Conference on Peer-to-Peer Computing
DPTree: A Balanced Tree Based Indexing Framework for Peer-to-Peer Systems
ICNP '06 Proceedings of the Proceedings of the 2006 IEEE International Conference on Network Protocols
Hierarchical multidimensional search in peer-to-peer networks
Computer Communications
DEUS: a discrete event universal simulator
Proceedings of the 2nd International Conference on Simulation Tools and Techniques
DiST: fully decentralized indexing for querying distributed multidimensional datasets
IPDPS'06 Proceedings of the 20th international conference on Parallel and distributed processing
Simulating smart cities with DEUS
Proceedings of the 5th International ICST Conference on Simulation Tools and Techniques
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Real-time tracking of massive numbers of mobile devices, either carried by humans or embedded into vehicles, is a challenging problem whose solution may pave the way for a large set of valuable applications, ranging from social networking to ambient intelligence. A centralized approach, i.e. a server collects position data and provides it to interested consumers, is highly questionable, as performance can hardly scale up to the needs several million concurrent users. On other hand, a decentralized peer-to-peer approach, for which positioning data would flow directly among mobile devices may be very appealing, provided that messages to be routed are not too frequent and too expensive in terms of bandwidth usage. In this context we propose a peer-to-peer overlay scheme called Distributed Geographic Table (DGT), where each participant can efficiently retrieve node or resource information (data or services) located near any chosen geographic position. In particular, we describe a DGT-based localization protocol, that allows each peer for proactively discovering and tracking all the peers that are geographically near to itself. We provide a performance analysis of our protocol, referring to a simulated (although realistic) scenario where several hundred vehicles move on a real map. Our results show that the solution is efficient, scalable and highly adaptable to different application scenarios.