Telecom Italia: As part of the “Big Data Challenge”, consists of data about telecommunication activity in the city of Milan and in the province of Trentino. Data collectors divide Milan into 100×100 regions, and all traffic data statistics are based on regions. The total volume of SMS, call, and internet traffic sent and received by users in each area is collected every 10 minutes. We sample the internet traffic data during the period from 22:00 10/31/2013 to 22:50 12/19/2013 with a cell area size of 15×15.