Ever wonder how much longer until the next bus arrives? The UCSC Bus Tracking System (BTS) is a pilot program which provides real-time location services for the shuttles servicing the UCSC campus. The project is currently in-progress while we outfit the shuttles with hardware and install a network of basestations around the campus. See a demo here.

The Santa Cruz mObile Radio Platform for Indoor and Outdoor Networks (SCORPION) testbed is in the initial stages of development. The iNRG lab, in collaboration with the CCRG lab at UC Santa Cruz, is working on a testbed for the purpose of testing advanced networking protocols for Delay-Tolerant Networking (DTN) and Medium-Access control (MAC) protocols. More information such as links, publications, and pictures to follow...

Trajectory-Assisted Routing (TAROT) is a delay- and disruption-tolerant routing algorithm. Forwarding decisions are made based on extracted mobility structure. This is work in progress, more info to come!

This project aims to build a monitoring station to aid firefighters during a forest fire by providing real-time wind and humidity readings.

The Carnivore Adaptive Research Network in Varied Outdoor Remote Environments (CARNIVORE) project was born out of a need to look deeper into the biology of predators and their interaction with their environment. CARNIVORE is a Wireless Sensor Network (WSN) which utilizes collars placed onto mountain lions in the Santa Cruz area. The collars rely on battery power, forcing the optimization of processing, storage, sensing, and communication activities. The data collected is used to monitor the physiology and behavior of the animals, in particular the energetic costs of hunting, walking, running, sleeping, and feeding.

The Yellowstone project, in collaboration with the US Geological Survey (USGS), is a sensor network designed to monitor key locations around Yellowstone National Park. The system logs temperature readings, which are subsequently uploaded to a server. The custom sensor nodes are power-efficient, failure-tolerant, and built to withstand adverse environmental conditions.

SEA-LABS (Sensor Exploration Apparatus utilizing Low-power Aquatic Broadcasting System) is an ocean monitoring project in collaboration with the marine sciences here at UCSC. Using custom hardware and software, the system measures things such as temperature, pressure, salinity, and ambient light levels, and uploads the information to the Internet. These readings provide valuable clues to trends such as ocean warming and coral bleaching.

Hybrid systems are control-theoretic approach that combine both continuous time dynamics and discrete event logic. Hybrid systems enable complexity reduction through the continuous approximation of discrete variables and successfully have modeled physical systems, robots, vehicle control, etc. However, Hybrid systems are new to networking modeling, and we are the first researchers who applying these to model communication networks. To characterize network behavior, these models use averaging to continuously approximate discrete variables, such as congestion window and queue size. Because averaging occurs over short time intervals, one still models discrete events such as the occurrence of a drop and the consequent reaction (e.g., congestion control). The proposed hybrid systems modeling framework fills the gap between packet-level and fluid-based models: by averaging discrete variables over a very short time scale (on the order of a round-trip time). Thus, hybrid systems are able to capture the dynamics of transient phenomena fairly accurately. This provides significant flexibility in modeling various congestion control mechanisms, different queueing policies, multicast transmission, etc

http://cs.sookmyung.ac.kr/~jslee/hybrid/