Human-Mobility Enabled Networks in Urban Environments: Is There Any (mobile Wireless) Small World Out There?
In the last 10 years, new paradigms for wireless networks based on human mobility have gained the attention of the research community. These paradigms, usually referred to as Pocket Switched Networks or Delay Tolerant Networks, jointly exploit human mobility and store-and-forward communications to improve the connectivity in sparse or isolated networks. Clearly, understanding the human mobility patterns is a key challenge for the design of routing protocols based on such paradigms. To this aim, the authors anonymously collected the positions of almost two thousand mobile phone users, spread over a metropolitan area greater than 200 km2 for roughly one month.