Patent ID: 8792851
Filing Date: 2014-07-29
Classification: H04W,Y02D

Abstract:
1. A Femto base station which is arranged to connect to a wireless communication network and to generate a first cell for providing a wireless communication service to at least one user equipment existing in a coverage of the first cell, the Femto base station comprising: a transceiver comprising a transmitter and a receiver for the wireless communication with the user equipment; a controller; and a network interface for communicating with an energy-saving coordination node in the wireless communication network, wherein the controller determines whether the Femto base station enters an energy-saving mode or not, when the controller determines that the Femto base station enters the energy-saving mode, the controller disables the operation of the transmitter, when the receiver detects a data transmission of a physical random access channel (PRACH) preamble, from the user equipment to a macro base station after the controller has disabled the operation of the transmitter, the controller responds by enabling operation of the transmitter, wherein the macro base station is arranged to generate a second cell having a broader coverage than the first cell and including the first cell, for providing the wireless communication service to the user equipment, the network interface receives, from the energy-saving coordination node, configuration information of the PRACH preamble transmitted from the user equipment to the macro base station, in advance, the controller reconfigures the receiver based on the configuration information in response to the controller disabling the operation of the transmitter, and the reconfigured receiver detects the PRACH preamble.