Patent ID: 9402256
Filing Date: 2016-07-26
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method for receiving reference signals at a user equipment from a network element, the method comprising: determining, based on signaling by the network element, a reference signal mapping at the user equipment; and detecting the reference signals at the user equipment using the reference signal mapping; wherein the signaling indicates whether the reference signal mapping is fixed or flexible and further indicates a density, the density being one of a high density and a low density, and wherein the low density indicates fewer reference signals than the high density; and wherein for a fixed mapping, a low density mapping is a reduced subset of reference signals from a high density mapping of set of reference signals, and for a flexible mapping, the low density mapping is a set of reference signals that is independent of the high density mapping of the set of reference signals.