We further compare the difference between heavy users and normal users in terms of their daily and hourly activity. We can clearly see from Fig. 5(a) that most heavy users (83.84%) activate the data service more than six days in a week. As shown in Fig. 5(b), heavy users generate traffic in 14 hours averagely in a day, 70% and 31% of heavy users use applications for more than 10 and 20 hours respectively.
We can conclude from above analysis that different mobile users tend to have distinct data usage patterns. Top 1% heavy users contribute up to 88% of the total mobile data traffic, and use applications much more frequently.
B. Mobility Pattern
Human mobility pattern is essential for a deep understanding of network dynamics and evolution. User mobility pattern in Mobile Internet also impact the network resource allocation and social network [27]. Here we investigate the users’ mobility patterns when they are active in data service usage.
Due to the cell tower oscillation (a mobile device located at the boundary of two cells may access alternately one cell and then the other, even if the user location is not changed), we study the number of distinct cells that a user visit instead of the number of cells a user actually cross during a certain period of time, which represent the moving range of the user when he/she is connecting into Mobile Internet and how frequently the user moves across.
There are Formula cells in the area. In this paper, we define four groups of users according to their mobility to represent the user moving activities in the week. Define Formula the number of a cell user access in a week. Accordingly, we define user groups in terms of :
Non mobility users, if