R
Richard Han
Researcher at University of Colorado Boulder
Publications - 181
Citations - 12788
Richard Han is an academic researcher from University of Colorado Boulder. The author has contributed to research in topics: Wireless sensor network & Key distribution in wireless sensor networks. The author has an hindex of 49, co-authored 178 publications receiving 12257 citations. Previous affiliations of Richard Han include IBM & University of California, Berkeley.
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X-MAC: A Short Preamble MAC Protocol for Duty-Cycled Wireless Sensor Networks ; CU-CS-1008-06
TL;DR: It is demonstrated through implementation and evaluation in a wireless sensor testbed that X-MAC's shortened preamble approach significantly reduces energy usage at both the transmitter and receiver, reduces per-hop latency, and offers additional advantages such as flexible adaptation to both bursty and periodic sensor data sources.
Proceedings ArticleDOI
X-MAC: a short preamble MAC protocol for duty-cycled wireless sensor networks
TL;DR: X-MAC as mentioned in this paper employs a shortened preamble approach that retains the advantages of low power listening, namely low power communication, simplicity and a decoupling of transmitter and receiver sleep schedules.
Journal ArticleDOI
MANTIS OS: an embedded multithreaded operating system for wireless micro sensor platforms
Shahzad H. Bhatti,James Carlson,Hui Dai,Jing Deng,Jeff Rose,Anmol Sheth,Brian Shucker,Charles Gruenwald,Adam Torgerson,Richard Han +9 more
TL;DR: The MANTIS MultimodAl system for NeTworks of In-situ wireless Sensors provides a new multithreaded cross-platform embedded operating system for wireless sensor networks that enables micro sensor nodes to natively interleave complex tasks with time-sensitive tasks, thereby mitigating the bounded buffer producer-consumer problem.
Journal ArticleDOI
INSENS: Intrusion-tolerant routing for wireless sensor networks
TL;DR: INSENS as discussed by the authors is a tree-structured routing protocol for WSNs that is designed to tolerate damage caused by an intruder who has compromised deployed sensor nodes and is intent on injecting, modifying, or blocking packets.
Journal ArticleDOI
Dynamic adaptation in an image transcoding proxy for mobile Web browsing
TL;DR: This work presents an analytical framework for determining whether to transcode and how much to trans code an image for the two cases of store-and-forward transcoding as well as streamed transcoding, and discusses methods of adaptation based on fixed quality aswell as fixed delay (automated/dynamic transcoding).