Patent ID: 9402233
Filing Date: 2016-07-26
CPC Classification: H04B,H04L,H04W

Claim Text:
1. An enhanced Node-B (eNB) to operate as part of a distributed antenna system (DAS) comprising one or more nodes having a same cell identifier (ID) and operating within a same cell as the eNB, the eNB arranged to: transmit a user equipment (UE)-specific reference signal and a cell-specific reference signal; configure one or more of the other nodes of a cell to transmit UE-specific reference signals, each of the UE-specific reference signals transmitted by each of the one or more of the other nodes being distinguishable from each of the UE-specific reference signals transmitted by each other node of the one or more of the other nodes and from the UE-specific reference signal that is transmitted by the eNB, the nodes comprising remote radio heads (RRHs); and receive location estimate information from a UE that is determined at least in part from the UE-specific reference signals and the cell-specific reference signal, wherein each of the UE-specific reference signals comprises a channel state information reference signal (CSI-RS) and the cell-specific reference signal comprises a positioning reference signal (PRS), wherein the location estimate information comprises an initial location estimate obtained using the received PRS and a PRS received from one or more other cells, an update of the initial location estimate obtained using the received CSI-RS from the eNB and the CSI-RSs received from the RRHs of the cell, and feedback indicative of channel estimations, obtained using the CSI-RS from the eNB and the CSI-RSs from one or more of the RRHs, for use by the eNB and the RRHs for cooperative orthogonal frequency division multiple access (OFDMA) transmissions.