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| Authors: | Federico Ferrari, Marco Zimmerling, Lothar Thiele, Olga Saukh |
| Group: | Computer Engineering |
| Type: | Inproceedings |
| Title: | Efficient Network Flooding and Time Synchronization with Glossy |
| Year: | 2011 |
| Month: | April |
| Pub-Key: | FZTS2011 |
| Book Titel: | Proceedings of the 10th International Conference on Information Processing in Sensor Networks (IPSN 2011) |
| Keywords: | SN, Network Flooding, Time Synchronization, Concurrent Transmissions, Constructive Interference, Wireless Sensor Networks |
| Publisher: | ACM/IEEE |
| Abstract: | This paper presents Glossy, a novel flooding architecture for wireless sensor networks. Glossy exploits constructive interference of IEEE 802.15.4 symbols for fast network flooding and implicit time synchronization. We derive a timing requirement to make concurrent transmissions of the same packet interfere constructively, allowing a receiver to decode the packet even in the absence of capture effects. To satisfy this requirement, our design temporally decouples flooding from other network activities. We analyze Glossy using a mixture of statistical and worst-case models, and evaluate it through experiments under controlled settings and on three wireless sensor testbeds. Our results show that Glossy floods packets within a few milliseconds and achieves an average time synchronization error below one microsecond. In most cases, a node receives the flooding packet with a probability higher than 99.99 %, while having its radio turned on for only a few milliseconds during a flood. Moreover, unlike existing flooding schemes, Glossy’s performance exhibits no noticeable dependency on node density, which facilitates its application in diverse real-world settings. |
| Location: | Chicago, IL, USA |
| Resources: | [BibTeX] [ External LINK ] |
