Abstract:
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 re...Show MoreMetadata
Abstract:
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.
Date of Conference: 22-26 June 2009
Date Added to IEEE Xplore: 07 July 2009
CD:978-0-7695-3659-0
Print ISSN: 1063-6927
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Sensor Networks ,
- Wireless Sensor Networks ,
- Empirical Model ,
- Disaster Management ,
- Wireless Networks ,
- Network Capacity ,
- Wireless Link ,
- Hardware Platform ,
- Speaker Recognition ,
- Satisfactory Quality ,
- Admission Control ,
- Voice Quality ,
- Rate Allocation ,
- Security Surveillance ,
- Data Rate ,
- Network Topology ,
- Data Loss ,
- Local Capacity ,
- Injection Rate ,
- Channel Capacity ,
- Number Of Streams ,
- Compression Ratio ,
- Multi-hop Networks ,
- Stream Quality ,
- Packet Loss ,
- Task Queue ,
- Mean Opinion Score ,
- Loss Ratio ,
- Dynamic Compression ,
- Automatic Evaluation
- Author Keywords
Contents Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Sensor Networks ,
- Wireless Sensor Networks ,
- Empirical Model ,
- Disaster Management ,
- Wireless Networks ,
- Network Capacity ,
- Wireless Link ,
- Hardware Platform ,
- Speaker Recognition ,
- Satisfactory Quality ,
- Admission Control ,
- Voice Quality ,
- Rate Allocation ,
- Security Surveillance ,
- Data Rate ,
- Network Topology ,
- Data Loss ,
- Local Capacity ,
- Injection Rate ,
- Channel Capacity ,
- Number Of Streams ,
- Compression Ratio ,
- Multi-hop Networks ,
- Stream Quality ,
- Packet Loss ,
- Task Queue ,
- Mean Opinion Score ,
- Loss Ratio ,
- Dynamic Compression ,
- Automatic Evaluation
- Author Keywords
