Building Embedded IP Raffi Krikorian Physics and Media

Building Internet0 Traditional networking hardware research focuses on bigger and faster pipes (Internet2) We focus on bit-dribbling hardware

Bridging the bandwidth divide Bringing IP to the leaf node Revisiting hardware transports and redesigning logical transports Cheap, low bandwidth IP (a level below Ethernet)

Going really small Distributed scalable system – no central point of control/servers are “bad” Devices own their data and own their threads Self organizing Growing

Building the first embodiment of small things RS-485 communication mature industrial practice no active joints media access costs pennies PIC microcontrollers built in UARTs plenty of space for networking code just a few dollars

Building more small things Different physical transports DSSS over powerlines Wireless RF Ultrasonic Revisiting old transports – slowing them down makes them a lot more accessible

Cramming bits is nothing new “Delayered” software stacks ARP, IP, ICMP, UDP, TCP – IPv4 compliant in 2K code HTTPd 0.9 server – 1K code

Naming, Classifying, Communication IDs for each device – unified or multiple For today, use Zeroconf – sub-DHCP For tomorrow, possibly use IPv6 as the unique address through mini-routing? Schema for identifying devices Communication standards

Programming and Coordinating a mass of devices Programming arbitrary massively parallel distributed systems is hard, building simple ones is easier These systems exhibit Scale complexity Interaction complexity Minimal resources Spatial relations

Building higher level systems Make it easy to cause complex behavior to occur “Google-like” services Hive JXTA Make it simple for complex behavior to emerge

How do you test all of this? First test installation was in Barcelona, moving towards second … CBA’s new home is first permanent testbed