Patent ID: 9137747
Filing Date: 2015-09-15
Classification: H04L,H04W

Abstract:
1. A method of selecting nodes in a serving cell in a distributed multi-node system (DMNS), the method comprising: receiving, by a radio frequency (RF) unit, channel state information reference signals (CSI-RS) for nodes in the serving cell from a base station; measuring, by a controller, signal intensities or interference levels for the nodes through the received CSI-RSs; determining, by the controller, at least one valid node among the nodes based on the measurement results; feeding back valid node information on the determined valid nodes or the measurement results to the base station; wherein the signal intensities or the interference levels are expressed as one of channel state information reference signal received power (CSI-RSRP), channel state information reference signal received quality (CSI-RSRQ), and channel state information reference signal's signal intensity (CSI-RSSI), wherein determining the valid nodes comprises calculating a received reference signal to interference plus noise ratio (RxRSINR) based on the signal intensities or the interference levels measured for the nodes, and wherein the RxRSINR is defined as the sum of reference signal received powers of selected nodes in the serving cell and the sum of interference of non-selected nodes in the serving cell and stream noise.