Apparatus and method for reducing interference and saving energy in femto/pico cell of hierarchical cell structure

摘要

An apparatus and a method manage power of a small base station. Whether a notify message indicating that a subscribed terminal enters a macro base station that includes an off-small base station is received from the macro base station under a closed access mode is determined. When the notify message is received, whether a service is providable to the subscribed terminal is determined. When the service is providable to the subscribed terminal, the small base station is turned on. During the closed access mode or when a load of a macro cell is large during an open access mode, when a terminal that should be serviced does not exist in the neighborhood of a small base station, an interference and power consumption unnecessarily generated may be reduced by turning off the small base station.

主权项

1. A method for managing power of a small base station, the method comprising:
receiving from a macro base station, by a power manager, a notify message indicating that a subscribed terminal enters the macro base station that includes a small base station in an off state and including information of the subscribed terminal; receiving from the subscribed terminal, by the power manager, transmission power information of the subscribed terminal based on the information of the subscribed terminal; determining an uplink path loss of the subscribed terminal based on the transmission power information and the information of the subscribed terminal; determining, by the power manager, whether the uplink path loss of the subscribed terminal is supportable by the small base station; and when a service is supportable to the subscribed terminal, turning on, by the power manager, the small base station in the off state.