Se encontraron 11 investigaciones
The Joint Tactical Radio System, Ground Mobile radios (JTRS GMR, formerly Cluster 1) is a multi-billion dollar joint-forces effort planned to be the next-generation voice-and-data radio used by the U.S. military. JTRS is a software-defined radio that will work with many existing military and civilian radios. It includes integrated encryption and Wideband Networking Software to create mobile ad hoc networks (MANETs). It must also include a new "waveform" (i.e., protocol suite): the Wideband Network Waveform (WNW), designed to satisfy the requirement of a battalion (1600 nodes) under stringent bandwidth constraints and mobility requirements. In this project,part of the greater JTRS cluster 1 effort, we extended HSLS (a highly scalable protocol I had previously developed) to match/exploit the characteristic of the JTRS radios (i.e., USAP MAC, multiple semi-static channels, and presence of frequency-defined overlapping regions or DOCk) to develop MALSR, WNW¿s subnet routing protocol, proved to scale to JTRS cluster. We also developed a HSLS-friendly scalable multicast mesh algorithm used for sparse mode multicast traffic.
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A $1.5M DARPA ATO research project. Developed and implemented novel technologies to support and exploit beamforming antennas in ad hoc networks, including the first MAC protocol for beamforming antennas. I designed the highly dynamic and scalable routing module, and co-designed the directional MAC. I then implemented both modules, analyzed their performance and refined the design. Other modules included directional neighbor discovery and link characterization/prediction. The complete system was ported to real hardware and demonstrated on a realistic military scenario including armored vehicles and a helicopter.
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A $1.4M DARPA ATO research project studying the behavior of large ad hoc networks under high density and in the presence of unidirectional links. The goal of the project was to understand the performance bottlenecks, and to develop algorithms that mitigate the performance degradation. This project pioneered the use of power control to transform the network topology to a more efficient operating point. That resulted, however, on a high-diameter network and excessive routing control overhead. In this project, I focused on studying the routing problem, developing the theory of ad hoc routing scalability. Based on that formulation, I invented, analyzed, and implemented HSLS, the first ad hoc routing protocol that scale with network size. HSLS is an easy-to-implement link state variant that does not require complex hierarchies.
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