1. A method, comprising: establishing a radio resource control (RRC) connection by a user equipment (UE) with a base station in a mobile communication network; collecting traffic statistics, wherein the traffic statistics comprises a cumulative distribution function (CDF) or a probability density function (PDF) of packet inter-arrival time, wherein the traffic statistics comprises a first packet inter-arrival time of a plurality of packet intra-bursts and a second packet inter-arrival time of a plurality of packet inter-bursts; and reporting a representation of the traffic statistics to the base station.