Wireless Multimedia Sensor Networks: Applications and Testbeds

I.F. Akyildiz, T. Melodia, K.R. Chowdhury
2008 Proceedings of the IEEE  
| The availability of low-cost hardware is enabling the development of wireless multimedia sensor networks (WMSNs), i.e., networks of resource-constrained wireless devices that can retrieve multimedia content such as video and audio streams, still images, and scalar sensor data from the environment. In this paper, ongoing research on prototypes of multimedia sensors and their integration into testbeds for experimental evaluation of algorithms and protocols for WMSNs are described. Furthermore,
more » ... pen research issues and future research directions, both at the device level and at the testbed level, are discussed. This paper is intended to be a resource for researchers interested in advancing the state-of-the-art in experimental research on wireless multimedia sensor networks. KEYWORDS | Distributed smart cameras; experimental testbeds; multimedia sensor networks; video sensor networks; wireless sensor networks Manuscript at 21:27 from IEEE Xplore. Restrictions apply. design of simple encoders. Clearly, such algorithms are very promising for WMSNs. Multimedia In-Network Processing. Processing of multimedia content has mostly been approached as a problem isolated from the network-design problem. Similarly, research that addressed the content delivery aspects has typically not considered the characteristics of the source content and has primarily studied cross-layer interactions among lower layers of the protocol stack. However, processing and delivery of multimedia content are not independent, and their interaction has a major impact on the achievable QoS. The QoS required by the application will be provided by means of a combination of cross-layer optimization of the communication process and in-network processing of raw data streams that describe the phenomenon of interest from multiple views, with different media, and on multiple resolutions. While we refer the reader to [1] for a detailed treatment of the research challenges in WMSNs at all layers of the communication protocol stack, in this paper, we describe applications of WMSNs and discuss ongoing research on prototypes and testbeds for experimental evaluation of algorithms, protocols, and hardware for the development of wireless multimedia sensor networks. Furthermore, we discuss open research issues and outline future research directions. This Fig. 2. Internal organization of a multimedia sensor.
doi:10.1109/jproc.2008.928756 fatcat:scfgptc6gzcd7bk4xojhns72ly