2026-09-24T23:13:21Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/81840 2023-07-11 col_2142_5131 col_2142_10761 com_2142_5130 com_2142_10755 com_2142_234

Lui Sha Wang, Qixin 2015-09-25T20:20:38Z 2015-09-25T20:20:38Z 10000-01-01 2008 2008 I also designed a hard real-time, fast, and lightweight acoustic event localization protocol, the Lightning Protocol, for wireless sensor networks. Basically, wireless sensors are deployed in a square grid pattern. Every sensor is colored i (i = 1, 2, 3, 4), so that for any point on the plane, the enclosing four sensors have distinct colors. A sensor is either in RF listening or broadcasting mode (never both). Whenever a free (i.e. its state is neither winner nor loser) sensor hears the acoustic event, it broadcasts a noise on the wireless carrier for i time units. After that, if it does not hear any other noise on the wireless carrier, it wins the election; otherwise it loses the election. Whenever a free sensor hears a noise on the wireless medium, it loses the election. I prove this protocol elects the closest sensor with only O(1) RF broadcast within O(1) time. Energy Efficient Lightning Protocol is also designed, which only turns on RF module during localization period. Experiments using U. C. Berkeley Mica Motes show the feasibility of the protocol in lab environments. Made available in DSpace on 2015-09-25T20:20:38Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3337977.pdf: 1760170 bytes, checksum: b44d47f377539304dfee8079a3afd2e2 (MD5) Previous issue date: 2008 Embargo set by: Seth Robbins for item 83121 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 90 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2008. http://hdl.handle.net/2142/81840 (MiAaPQ)AAI3337977 eng Computer Science Real-Time and Embedded Systems Building Blocks for Cyber-Physical Systems text Computer Science Computer Science University of Illinois at Urbana-Champaign Dissertation Ph.D.