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Evaluation Platform Key Benefits and Limitations Required significant effort to build Powerful, flexible environment can be readily replicated; scripts automate hard tasks supports ongoing DTN system development, test, and evaluation developers can have their own copy of a virtual testbed easier to manage than a multi-node setup short learning curve: Linux, ns-2 coarse-grained simulations possible within same framework can be used for other projects with minor additional effort Limitations needs a powerful machine with a lot of memory needs host kernel modification emulator is a single process, which limits total event throughput inherits ns-2 limitations for modeling wireless networks care must be exercised with expect scripting after emulation starts network is isolated, i.e., all cross traffic must be emulated |