Patent ID: 8285254

Claim:
A femtocell in electronic communication with different user equipments, the femtocell comprising: a setting unit that sets and establishes a corresponding monitoring area to monitor the user equipments; a subscriber identity module (SIM) that stores a whitelist, the whitelist comprising a plurality of identification (ID) codes corresponding to the user equipments; a signal processing unit that is electrically connected to the setting unit and the SIM; and a monitoring unit that is electrically connected to the signal processing unit, wherein when International mobile subscriber identification (IMSI) code of the user equipment is not in the whitelist of the SIM, the signal processing unit sends a control signal to the monitoring unit, causing the monitor unit to establish and monitor the position of the user equipment and determine whether the user equipment is within the predetermined monitoring area according to the position of the user equipment; wherein the femtocell communicates with a gateway though a wireless network or a wired connection to establish a communication connection, the femtocell is further in electronic communication with a mobile network through the gateway, the user equipments can access the mobile network through the femtocell and the gateway, the ID codes are IMSI codes; and wherein the user equipments are positioned at corresponding predetermined places to form a three-dimensional monitoring network and establish communication with mobile network through the femtocell, and the signal processing unit calculates and simulates positions, directions and distances of the user equipments using a radio resource control protocol and an assisted global positioning system protocol, to form the monitoring area.