6533b834fe1ef96bd129df57

RESEARCH PRODUCT

You’ve Got Photos! The design and evaluation of a location-based media-sharing application

subject

description

PhotoJournal is a novel location-based media sharing appli- cation that enables users to build interactive journals that associate multimedia files with locations on maps and share this information with other users. Its underlying informa- tion discovery and sharing mechanism is 7DS that runs in either pure peer-to-peer or centralized server-to-client mode, depending on the availability of a server and/or an infras- tructure. 7DS-enabled devices act as miniature caches, shar- ing information with each other. When access to an informa- tion server (e.g., web server) is not available, the local 7DS instance running on the device enables the device to search and access information from other peers in proximity. We have implemented the prototype and evaluated the delay to access the data using three testbeds. Two of these testbeds employ a centralized (server-to-client) architecture, while the third one applies the peer-to-peer paradigm. Depend- ing on the underlying network technology and device capa- bilities, this delay varies. The results encourage us to per- form additional empirical-based studies under increased traf- fic load conditions and initiate a user-study in the premises of a museum and a research park.