Waldir Moreira, Ronedo Ferreira, Douglas Cirqueira, Paulo Mendes and Eduardo [email protected]
September 30th, 2013ACM MobiCom Workshop on Lowest Cost Denominator Networking for Universal Access (LCDNet 2013)
Miami, USA
SocialDTN: a DTN Implementation for Digital and Social Inclusion
Agenda• Introduction
•Goal
• Scenario
• Existing Implementations
• SocialDTN Architecture
• First Experiments
• Future Steps
Introduction• Nowadays, people still suffer with digital divide and social exclusion
• Delay/Disruption-Tolerant Networking can mitigate such effects by means of opportunistic and asynchronous communication
• SocialDTN, an Android implementation of the DTN architecture
Goal•Mitigate the effects of digital divide and social exclusion in the riverside communities
Scenario
• Characteristics– Mobile nodes– Disruptive and intermittent links– Low node density
• Requirements– Exploit social proximity and interactions
between users through Bluetooth– Be independent of any network infrastructure
Existing Implementations•DTN2, IBR-DTN, and Bytewalla
•Not suitable in our target scenario as they somewhat use infrastructure
SocialDTN Architecture• Base and Android Libraries
SocialDTN Architecture• Base Library
– Core functionalities• Bundle Protocol Agent• Convergence Layer• Bundle Router
– Routing functionalities• Direct delivery and social-based dLife
• Android Library– Bluetooth Convergence Layer– Discovery Manager
First Experiments• Deployment test with Android devices carried
by seven students
• A traffic generator (load of 6 messages/hour)
• Message size varied between 1 KB and 1 MB representing different applications and data types (e.g., asynchronous chats, email, video sharing)
• Objectives:
– Evaluate the BCL implementation
– Check the implementation of dLife
First Experiments• SocialDTN v1.0 used to disseminate educational
information through health agents in the riverside community of Combu Island
• Agent obtains information while visiting the Bettina Ferro hospital in the UFPA campus
• Received information increases the efficiency of the agent actions as the population is illiterate
Future Steps• Move towards the SocialDTN v2.0, which shall
include the social-based dLife as routing scheme
• Expand the experimentations to the target communities
• Release the collected social traces to the scientific community
Acknowledgements• Thanks are due to:– to Dórian Langbeck for his co-authorship on this paper and
implementation contributions, – to the National Council for Scientific and Technological
Development (CNPq), – to the Amazon Research Foundation (FAPESPA), and – to FCT for financial support of the User-Centric Routing project
(PTDC/EEA-TEL/103637/2008) and the PhD grant (SFRH/BD/62761/2009) of Waldir Moreira
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