Mesh Networks and DTN Break Out Group  Common research challenges  A representative experiment  Issues for a one page writeup  what incentive for the “a day in life” experiment? Perhaps, by maintaining a standard client without changes, the experiment can leverage all existing applications (e.g. skype, yahoo messenger).

Research Challenges  One Network: Exploiting (relationship to) wired network  different architectures will use connections to wired network in different way (short circuit)  wired network provides infrastructure: naming, CNF post-offices, geocast routing  End-to-end (optimization-based) requires common view of pricing  access architecture  Improving spectrum use via protocol engineering  cross layer, low-power  Routing:  Better routing w/o heavyweight signaling  Opportunistic routing  Intermittently connected endpoints  Scale & heterogeneity:  Mobile experiments  devices

Research Challenges 2  Multiple device modalities (wimax to wifi to 3g to DVB)  Exploiting context (location, connectivity….)  X-ilities: explainability, manageability  Autonomic, zero-conf  Resource use: policing (you are using more than your fair share), cooperative?  Investigate (different architectures for) tradeoff between infrastructure, multi-hop  … and Security (…and Privacy, and DRM )  What about layer 1 and 2 (some view as very important)  Tie in with layer 3: routing, cooperative approaches – this impact networking

Management and Infrastructure Challenges  Heterogeneity (do we need multiple smaller testbeds)  Can one testbed, or even a small # testbed solve all problems?  Facility requirement: slicing gives larger nets than physical # nodes, but also reservations to allow latency tests  Management  Benchmarks  Measurement, repeatability  More accurate simulation (also repeatable)  Measuring/characterizing RF “in the wild”  Design for flexibility/extensibility since at this stage of the field, researchers have no idea what they wants to do a year from now

A Good Scenario Must:  Accommodate mobility  Real people doing real things (uncontrolled, in the wild)  Controlled (programmable) mobility (for repeatability)  Accommodate disconnectedness  Multiple radios (cognitive), with ability to control PHY  Communication requirements: to Internet, as well as to within wireless network (e.g., P2P video sharing)

Scenario: A Day In Life  Home, cars (commuting) and bus, walking in urban environment, work, commute back home, home  Media rich  Real people doing real things means building a testbed in a (or multiple) real human environments (towns)  Both Internet connectivity and peer-to-peer usage  Run this scenario as a continuous reserved slice in GENI  … but also need controlled experimental environment