Multicluster, mobile, multimedia radio network
Wireless Networks
A scalable content-addressable network
Proceedings of the 2001 conference on Applications, technologies, architectures, and protocols for computer communications
Chord: a scalable peer-to-peer lookup protocol for internet applications
IEEE/ACM Transactions on Networking (TON)
Pastry: Scalable, Decentralized Object Location, and Routing for Large-Scale Peer-to-Peer Systems
Middleware '01 Proceedings of the IFIP/ACM International Conference on Distributed Systems Platforms Heidelberg
Incrementally improving lookup latency in distributed hash table systems
SIGMETRICS '03 Proceedings of the 2003 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Tapestry: An Infrastructure for Fault-tolerant Wide-area Location and
Tapestry: An Infrastructure for Fault-tolerant Wide-area Location and
Dynamic Layer Management in Super-Peer Architectures
ICPP '04 Proceedings of the 2004 International Conference on Parallel Processing
The performance impact of traffic patterns on routing protocols in mobile ad hoc networks
MSWiM '04 Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
A cross-layer optimization of gnutella for mobile ad hoc networks
Proceedings of the 6th ACM international symposium on Mobile ad hoc networking and computing
Large Scaling Unstructured Peer-to-Peer Networks with Heterogeneity-Aware Topology and Routing
IEEE Transactions on Parallel and Distributed Systems
An Enhanced Gnutella for Ad-Hoc Networks
ICSNC '06 Proceedings of the International Conference on Systems and Networks Communication
Analysing movement and world transitions in virtual reality tele-conferencing
ECSCW'97 Proceedings of the fifth conference on European Conference on Computer-Supported Cooperative Work
ANSS-41 '08 Proceedings of the 41st Annual Simulation Symposium (anss-41 2008)
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With the rapid developments in technology, Mobile Collaborative Virtual Environments (MCVEs) have become an unavoidable application in area such as military training, health, and education. Unfortunately, as 1the number of users grows, nodes may easily become overloaded as they process messages from other nodes. Most of the existing Ultrapeer systems are confined to wired network environments and thus preclude collaboration while users are mobile. In this paper, a Gnutella Ultrapeer system GUS to improve the performance of MCVEs is proposed. In MANETs, a reconfiguration process is frequently required in the Ultrapeer system due to node mobility. In addition, the number of Ultrapeers must be well dispersed throughout the overlay network. To address these problems, we adopt a novel selection approach in which we create a hierarchical overlay network based on the CVE profile in order to reflect the user's interest in the virtual environment. We then perform a dynamic Ultrapeer election based on a score measurement that combines the network behaviors and the user behaviors in the VE. Thus, not every change in the network topology will entail an immediate Ultrapeer system reconfiguration. Simulation results indicate that the proposed GUS is more efficient than popular Ultrapeer topologies in several important scenarios.