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ResearchFrom ANRG
The following are some of the ongoing and recent research subjects (primarily in the area of wireless sensor networks) investigated by the Autonomous Networks Research Group at USC.
Cross-Layer Protocol Design in Wireless Sensor Networks Currently, this research focuses on the design and implementation of practical transport protocols based on theoretical cross-layer rate optimization techniques that have often have an economic market-interpretation where intermediate routers price the bandwidth from the perspective of sellers, and data sources determine appropriate rates based on these prices from the perspective of buyers. We have also previously explored ways to do joint routing and scheduling to provide good latency and throughput performance in wireless networks, while maintaining energy efficiency.
Mobile Social Networks We are broadly interested in the design and analysis of next-generation mobile social networking applications. These are applications involving mobile devices with both infrastructure and peer-to-peer communications in which each user shares their information with a group of others within some spatial/temporal/social scope. This has included research on new kinds of mobile interaction games, P2P content sharing in vehicular networks, and mobility models with a focus on social contacts.
Medium Access for Cognitive Radios, Underwater Networks, Sensor Networks, and Multichannel Wireless Networks Managing interference is one of the key problems in wireless networking. Our prior and ongoing research in this area includes enhancing existing CSMA MAC protocols for wireless sensor networks; developing sensing-based access approaches for cognitive radio networks; analyzing MAC protocols for long propagation delay environments; developing energy-efficient uplink scheduling mechanisms for multiuser multichannel systems. This research requires the application of a rich set of theoretical tools from optimization theory, stochastic decision processes, game theory, and artificial intelligence.
Cooperative Routing in Wireless Networks This incipient research is aimed at an important future direction in the design of wireless networks: taking advantage of physical layer diversity and cooperative communication in designing higher layer protocols.
Wireless Network Modeling Simple but realistic abstractions of wireless link quality, interference, and the network graph are essential for wireless network protocol design and analysis. We have worked on developing such models based on empirical observations and basic communication theoretic arguments, and on analyzing fundamental properties of random geometric graphs.
Data Centric Routing and Querying in Wireless Sensor Networks This research has focused on how wireleess sensor networks can be made more efficient by taking into account application-specific content information. It includes work on joint routing and compression mechanisms, and on the design and analysis of structured and unstructured querying mechanisms.
Localization and Time Synchronization in Wireless Networks In this research, we have developed some novel sequence-based algorithms for location estimation; and analyzed and designed time synchronization techniques that are best suited for long-propagation delay environments.
University of Southern California - School of Engineering - Electrical Engineering Department - Computer Science Department |