Control-Based Adaptive Middleware for Real-Time Image Transmission over Bandwidth-Constrained Networks

Real-time image transmission is crucial to an emerging class of distributed embedded systems operating in open network environments. Examples include avionics mission replanning 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 Control-based 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. Experi...

• Type: Journal
• Year: 2008
• Where: TPDS
• Authors: Xiaorui Wang, Ming Chen, Huang-Ming Huang, Venkita Subramonian, Chenyang Lu, Christopher D. Gill
• Keywords: Image Transmission, Image Transmission Deadlines, Real-time Image Transmission, TPDS 2008