In 2000, he along with Kannan Varadhan and Deborah Estrin analyzed a way to prevent oscillations in topologies. During the study he have discovered that an inter-domainrouting protocol called hop-by-hop is responsible for the unconstrained route selection and therefore the route get oscillated. However, if "safe" mode is enabled, it can shorten route selection as well as the number of errors.[6] A year later, he peered up with Deborah Estrin and Deepak Ganesan of UCLA as well as Scott Shenker to develop braided multipath routing scheme which he claimed to be important alternative for energy-saving recovery after lone and patterned failures.[7] On August 14, 2001 he used simulation to evaluate Geographic and Energy Aware Routing protocol and discovered that it lives longer than its non-geographic energy aware routing counterpart.[8]
^Brad Karp; Fang Yu; Deborah Estrin; Scott Shenker (2002). "GHT: A geographic hash table for data-centric storage". Proceedings of the 1st ACM international workshop on Wireless sensor networks and applications. ACM. pp. 78–87. doi:10.1145/570738.570750. ISBN978-1-58113-589-3. S2CID565276.
^Jeongyeup Paek; Joongheon Kim; Ramesh Govindan (2010). "Energy-efficient rate-adaptive GPS-based positioning for smartphones". Proceedings of the 8th international conference on Mobile systems, applications, and services - Mobi Sys '10. ACM. pp. 299–314. CiteSeerX10.1.1.192.2391. doi:10.1145/1814433.1814463. ISBN978-1-60558-985-5. S2CID3341893.