The human dyanmics in short message communication

With the rapid developments of modern technologies in communications, short messages (SM) is becoming one of the most frequently used communication channels in the world. Based on the real SM communication records in Chinese mobile phone operator, we study the inter-event time distributions between two consecutive SMs, and find that the inter-event time distribution is heavy tailed and can be fitted by power-law distribution both in the group and individual levels. A monotonous relation between the activity and the power-law exponents is found in the individual level.