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A Survey on Multimedia-Based Cross-Layer Optimization in Visual Sensor Networks
DCA-CT-UFRN, Campus Universitário, Lagoa Nova, Universidade Federal do Rio Grande do Norte, 59072-970 Natal RN, Brazil
DTEC-UEFS, Av Transnordestina, S/N, Novo Horizonte, Universidade Estadual de Feira de Santana, 44036-900 Feira de Santana BA, Brazil
* Author to whom correspondence should be addressed.
Received: 21 March 2011; in revised form: 13 April 2011 / Accepted: 15 April 2011 / Published: 18 May 2011
Abstract: Visual sensor networks (VSNs) comprised of battery-operated electronic devices endowed with low-resolution cameras have expanded the applicability of a series of monitoring applications. Those types of sensors are interconnected by ad hoc error-prone wireless links, imposing stringent restrictions on available bandwidth, end-to-end delay and packet error rates. In such context, multimedia coding is required for data compression and error-resilience, also ensuring energy preservation over the path(s) toward the sink and improving the end-to-end perceptual quality of the received media. Cross-layer optimization may enhance the expected efficiency of VSNs applications, disrupting the conventional information flow of the protocol layers. When the inner characteristics of the multimedia coding techniques are exploited by cross-layer protocols and architectures, higher efficiency may be obtained in visual sensor networks. This paper surveys recent research on multimedia-based cross-layer optimization, presenting the proposed strategies and mechanisms for transmission rate adjustment, congestion control, multipath selection, energy preservation and error recovery. We note that many multimedia-based cross-layer optimization solutions have been proposed in recent years, each one bringing a wealth of contributions to visual sensor networks.
Keywords: cross-layer optimization; visual sensor networks; wireless multimedia sensor networks; congestion control; error recovery
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MDPI and ACS Style
Costa, D.G.; Guedes, L.A. A Survey on Multimedia-Based Cross-Layer Optimization in Visual Sensor Networks. Sensors 2011, 11, 5439-5468.
Costa DG, Guedes LA. A Survey on Multimedia-Based Cross-Layer Optimization in Visual Sensor Networks. Sensors. 2011; 11(5):5439-5468.
Costa, Daniel G.; Guedes, Luiz Affonso. 2011. "A Survey on Multimedia-Based Cross-Layer Optimization in Visual Sensor Networks." Sensors 11, no. 5: 5439-5468.