Wireless System Research Group
List of Projects
Sponsors
Robust resource management in ISM bands
Explosion of wireless products and innovative use of the ISM bands lead to a very crowded spectrum space. When densely deployed, significant performance degradation may be experienced ranging from higher latency and lower data rate to starvation and service disruption. To tackle the co-existence problems, two key challenges need to be addressed. First, there exists innate uncertainty in channel quality, user location and population as well as coexisting devices and networks. Second, many emerging applications using radio technologies in the ISM bands require high availability and predictable services instead of large access bandwidth. The focus of this project is thus to develop theoretical models and algorithms for robust resource management that target at minimizing the outage and/or disruption of desired service level under varying resource availability in 802.11 like networks. This work will result in i) new methods and measurement procedures for inferring internal and external conditions of broadband wireless networks; ii) novel concept of effective margin as a quantifiable metrics for the robustness of resource management decisions; and iii) design of an optimization framework for robust resource management with both discrete and continuous constraints. The proposed activities serve as fundamental building blocks to address wireless co-existence issues in industry, commercial and medical domains, where severe interferences can possibly cause tremendous economic loss and claim human lives. The interdisciplinary nature of this research lends naturally to a combine engineering and science curriculum development at both undergraduate and graduate levels with a significant experimental component.Funded by NSF CNS-0832084
Wireless Structure Health Monitoring
Early-age monitoring, impact detection and structural health monitoring are important issues for concrete structures, especially concrete infrastructures such as bridges. We are collaborating with mechanical and civil engineering researchers to develop robust and scalable solution to civil structure monitoring.Funded by NSF CNS-0832089
Collaborative In-network Processing in Wireless Vision Sensor Networks
With the ever-decreasing cost of communication and sensing hardware, networked multi-camera systems have gained much interest for providing automated, wide-area surveillance solutions in both civilian, including commercial and public scenarios, and military applications. By embedding computation power on individual sensor nodes, collaborative in-network processing of video content can greatly reduce the bandwidth and computation requirements on the back-end server, providing better accuracy and robustness in presence of failure and target occlusion.Funded in part by ARO/Defense University Research Instrumentation Program (DURIP)
Data Dissemination in Multihop Wireless Networks: Theory and System Design
Data dissemination in multihop wireless networks is concerned with transporting application data and control messages from one to multiple end points in a geographic area. It is the cornerstone of many network management and data services such as resource discovery, time synchronization, software distribution, multimedia streaming in multihop wireless networks. Though widely used, the fundamental properties of data dissemination remain elusive. There are no satisfactory answers even to basic questions. In this project, we address the theoretical as well as system aspect of designing efficient data dissemination and aggregation protocols for multihop wireless networks.Funded by NSF CNS-0546391