Patent ID: 9713086
Date: 2017-07-18
CPC Classifications: H04W,Y02D

Claim:
1. A method for controlling power of a Remote Radio Head (RRH) by a Base Band Unit (BBU) in a Cloud Radio Access Network (C-RAN) environment having the BBU and the RRH separated from each other, the method comprising: receiving, from a terminal, a measurement report message for reporting that a measured strength of a downlink (DL) signal of the RRH having a switched-off state is greater than or equal to a threshold, wherein the RRH is controlled by the BBU associated with the RRH, and wherein the BBU performs layer processing for the RRH; transmitting, to the terminal, Radio Access Technology (RAT) information indicating RATs supported by the RRH in response to the measurement report message; receiving, from the terminal, a wake-up request message containing information about a RAT preferred by the terminal among the RATs indicated by the RAT information; and setting a power status of the RRH to Switch On based on the wake-up request message.