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2009 29th IEEE International Conference on Distributed Computing Systems (2009)
Montreal, Quebec, Canada
June 22, 2009 to June 26, 2009
ISSN: 1063-6927
ISBN: 978-0-7695-3659-0
pp: 450-457
Recent years have witnessed the pilot deployments of audio or low-rate video wireless sensor networks for a class of mission-critical applications including search and rescue, security surveillance, and disaster management. In this paper, we report the design and implementation of Quality-aware Voice Streaming (QVS) for wireless sensor networks. QVS is built upon SenEar, a new sensor hardware platform we developed for high-bandwidth wireless audio communication. QVS comprises several novel components, which include an empirical model for online voice quality evaluation and control, dynamic voice compression/duplication adaptation for lossy wireless links, and distributed stream admission control that exploits network capacity for rate allocation. We have extensively tested QVS on a 20-node network deployment. Our experimental results show that QVS delivers satisfactory voice quality under a range of realistic settings while achieving high network capacity utilization.
Voice Streaming, Admission Control, Sensor Networks

G. Xin, L. Li, L. Sun and Y. Liu, "QVS: Quality-Aware Voice Streaming for Wireless Sensor Networks," 2009 29th IEEE International Conference on Distributed Computing Systems(ICDCS), Montreal, Quebec, Canada, 2009, pp. 450-457.
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