Dynamic Sensor Networks DARPA Review User Platform. May 30, 2001 USC Information Sciences Institute Arlington, VA. Compaq iPAQ H3600. 206 MHz StrongARM processor 16 MB persistent flash 32/64 MB RAM Serial/USB ports Expansion BUS 1, 2-slot PCMCIA sleeves
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Dynamic Sensor NetworksDARPA ReviewUser Platform May 30, 2001USC Information Sciences InstituteArlington, VA
Compaq iPAQ H3600 • 206 MHz StrongARM processor • 16 MB persistent flash • 32/64 MB RAM • Serial/USB ports • Expansion BUS • 1, 2-slot PCMCIA sleeves • VGA out, microdrive, networking, etc. • CF sleeve • Custom sleeves • 320x240 display with 4096 colors • Rechargeable batteries (Li-ion) X
Compaq supports Linux through http://www.handhelds.org All iPAQ hardware now supported under Linux ISI-East contributed support for suspend/resume iPKG (Itsy Package Management System) Embedded Linux packaging and distribution system Developed at ISI-East Now an integrated part of standard handhelds.org Linux Distributions. Linux on iPAQ
BackPAQ Research Sleeve • Digital Camera • 32 MB Flash RAM • 2 PCMCIA Sleeves • Accelerometer • Programmable Logic, (FPGA) • Digital IO Port http://crl.research.compaq.com/projects/mercury/
IPAQ running Linux with 802.11 wireless Ethernet PC card. Cross-displayed VT GUI from Linux laptop to X on IPAQ. Displayed node locations, live vehicle ground truth, live seismic energy levels, etc. Live wireless video from laptop webcam to IPAQ using VIC tool. Achieved ~5 fps (now 30 fps). Exploring better integration of video into VT GUI for multi-camera display. Investigating low power video transmission codecs under PAC/C PADS project. Sensor Network Interface
Cross-displayed VT GUI from Linux laptop to X on IPAQ. Still waiting on a Java port for native execution Free Java implementations are immature (kaffe has Java 1.1.8) Port of Sun’s JDK 1.3 are help up in conformance validation, (status unchanged since February) Currently investigating heads-up display with PCMCIA VGA card State of VT GUI on iPAQ
Wireless Surveillance and Video Conferencing • Live video display demonstrated at 29 Palms using multicast MBONE video tools over wireless network. • We’re very interested in integrating some video capability into fielded sensor node for future experiments.
IPAQ + GPS + 802.11 Ethernet Logged vehicle locations once per second. Transmitted log to mySQL database in real time when in range of wireless LAN. Ran 8 hours on 4 D-cells. Worked great! GPS Ground Truth
Provided long-haul link from base camp to sensor field. (2) access points with directional antennas (~3 mile range). Provided an instrumentation backbone without wires. (2) access points with omni antennas (0.3 mile range). Worked very well in the field. 11 Mb/sec adequate for most purposes (including video). Convenient to be able to telnet to all devices – even in vehicles! Recommend full coverage at next exercise. Long Haul Ethernet
One instrumentation laptop per 3-node HYDRA cluster. Log radio events, seismic energy from HYDRA serial port. One UPS battery per cluster. Weighs 65 pounds! In practice, barely adequate. In future, plan to use more IPAQs instead! Linux Laptop powered by UPS. 802.11 Wireless Ethernet USB<->Serial(8) Hub Wireless access point + hub(in gateway laptop only) Instrumentation Laptop