Evidence That Calls-Based and Mobility Networks Are Isomorphic

Area of Science:

• Social Network Analysis
• Human Mobility Studies
• Telecommunications Research

Background:

• Social interactions occur through face-to-face communication and telecommunications.
• Understanding the spatial dimensions of social networks is crucial for urban planning and communication studies.

Purpose of the Study:

• To compare the network structures derived from phone call data and cell phone mobility data.
• To investigate the relationship between communication patterns and physical movement in a large-scale dataset.

Main Methods:

• Utilized a dataset of billions of phone calls in Colombia over six months.
• Constructed and analyzed two distinct spatial networks: one based on call connections and another on cell phone mobility.
• Employed network analysis techniques to compare structural properties, including spatial decay coefficients.

Main Results:

• The phone call network was found to be a higher-order aggregation of the mobility network.
• Both networks exhibited isomorphic structures, indicating a strong underlying similarity.
• The mobility network displayed a higher spatial decay coefficient compared to the call network.

Conclusions:

• Telecommunication network structures are highly correlated with human mobility patterns.
• Adjusting for distance effects makes the call and mobility networks virtually indistinguishable, suggesting shared underlying spatial constraints.
• This research provides insights into the spatial organization of social interactions mediated by technology.