Exploitation of Social Behavior Patterns of Mobile Users

Social-Aware Data Dissemination in Opportunistic Mobile Networks

Wei Gao and Guohong Cao

Introduction & Motivation Opportunistic Mobile Networks

Mobile platforms: smartphone, vehicle, sensor Inter-connection based on opportunistic contact

Communication range of WiFi/Bluetooth radio Applications: mobile cyber-physical systems

Remote sensing Disaster/emergency recovery Military scenarios

Data dissemination: carry-and-forward Network uncertainty: probabilistic contact prediction Network quality: limited network information Network subjectivity: interests of mobile users

Sociological concepts Centrality: social importance of a user

to facilitate communication Community: user groups based on

their social links

Social links among users Online social network: explicit

personal acquaintances Mobile users: implicitly exhibited

by their contact process Similarity of social context:

time/location

Social Contact Patterns [TON’12, TMC’12, ICNP’10, MobiHoc’09]

Social Interest Patterns [ICDCS’12, INFOCOM’11]

Goal Infer social links from users’

contact process Problem

unicast, multicast Probabilistic contact prediction

Estimating pairwise contact probability

Model: pairwise contact patterns Cumulative patterns: Poisson process Transient patterns: On/off periods

Solution: centrality metricNumber of nodes

Pairwise contact probability

Goal Disseminating data only to users

being interested in the data Problem

data diffusion, cooperative caching Estimating users’ interests in data

Model Probabilistic user interest

Solution: interest-aware centrality metric