Discovery reference signal design for coordinated multipoint operations in heterogeneous networks

摘要

Certain aspects of the present disclosure relate to techniques that may be used to discover transmission points in heterogeneous networks (HetNet) that involves coordinated multi-point (CoMP) transmission and reception. Certain aspects of the present disclosure provide a method for wireless communications by a user equipment (UE). The method generally includes receiving a configuration indicating distinct resources used by each of a plurality of different transmission points involved in coordinated multipoint (CoMP) operations with the UE for transmitting discovery reference signals (RSs), receiving distinct discovery RSs transmitted from the plurality of different transmission points, and calculating at least one of path loss or reference signal received power (RSRP) estimations for each of the transmission points based on the distinct discovery RSs.

主权项

1. A method for wireless communications by a user equipment (UE), comprising:
receiving a configuration indicating distinct resources used by each of a plurality of different transmission points involved in coordinated multipoint (CoMP) operations with the UE for transmitting distinct discovery reference signals (RSs), wherein:
the distinct discovery RS for each transmission point is transmitted on resources also used for channel state information reference signals (CSI-RS),CSI-RS resources used for transmitting distinct discovery RS from transmission points of different power classes are mapped to different frequency and time positions, andresources used for discovery RS have at least one of denser frequency tone allocation or denser time allocation than resources used for CSI-RS; receiving the distinct discovery RSs transmitted from the plurality of different transmission points on the distinct resources; and calculating at least one of path loss or reference signal received power (RSRP) estimations for each of the transmission points based on the distinct discovery RSs.