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projects:camrit [2009/01/20 15:44] gsmith28 Page moved from camrit to pastprojects:camrit |
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| ====== CAMRIT ====== | ====== CAMRIT ====== | ||
| ===== Control-based Adaptive Middleware for Real-Time Image Transmission ===== | ===== Control-based Adaptive Middleware for Real-Time Image Transmission ===== | ||
| + | {{:camrit.jpg |}} | ||
| Real-time image transmission is crucial to an emerging class of distributed embedded systems operating in open network environments. Examples include avionics mission re-planning over Link-16, security systems based on wireless camera networks, and online collaboration using camera phones. Meeting image transmission deadlines is a key challenge in such systems due to unpredictable network conditions. In this paper, we present CAMRIT, a Controlbased Adaptive Middleware framework for Real-time Image Transmission in distributed real-time embedded systems. CAMRIT features a distributed feedback control loop that meets image transmission deadlines by dynamically adjusting the quality of image tiles. We derive an analytic model that captures the dynamics of a distributed middleware architecture. A control theoretic methodology is applied to systematically design a control algorithm with analytic assurance of system stability and performance, despite uncertainties in network bandwidth. Experimental results demonstrate that CAMRIT can provide robust real-time guarantees for a representative application scenario. | Real-time image transmission is crucial to an emerging class of distributed embedded systems operating in open network environments. Examples include avionics mission re-planning over Link-16, security systems based on wireless camera networks, and online collaboration using camera phones. Meeting image transmission deadlines is a key challenge in such systems due to unpredictable network conditions. In this paper, we present CAMRIT, a Controlbased Adaptive Middleware framework for Real-time Image Transmission in distributed real-time embedded systems. CAMRIT features a distributed feedback control loop that meets image transmission deadlines by dynamically adjusting the quality of image tiles. We derive an analytic model that captures the dynamics of a distributed middleware architecture. A control theoretic methodology is applied to systematically design a control algorithm with analytic assurance of system stability and performance, despite uncertainties in network bandwidth. Experimental results demonstrate that CAMRIT can provide robust real-time guarantees for a representative application scenario. | ||
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| * [[http://www.ece.utk.edu/~xwang/RTES/CAMRIT/README.pdf|Install and build CAMRIT]] | * [[http://www.ece.utk.edu/~xwang/RTES/CAMRIT/README.pdf|Install and build CAMRIT]] | ||
| ==== Contact ==== | ==== Contact ==== | ||
| - | For more information, please email [[http://www.ece.utk.edu/~xwang|Prof. Xiaorui Wang]]. This project is a collaborated work with Prof. Chenyang Lu and Prof. Christopher Gill at Washington University in St. Louis. | + | For more information, please email [[people:#dr._wang|Prof. Xiaorui Wang]]. This project is a collaborated work with Prof. Chenyang Lu and Prof. Christopher Gill at Washington University in St. Louis. |
