Patent ID: 9660775
Date: 2017-05-23
CPC Classifications: H04L,H04W

Claim:
1. A method of operating a base station configured to communicate with at least one user device, the method comprising: transmitting, by the base station in a first slot of a subframe, a first group of resource elements, each resource element comprising a time and a frequency, wherein at least one of the resource elements of the first group of resource elements comprises a reference element; determining, by the base station, if the at least one user device will decode a further resource element using the reference element of the at least one of the resource elements of the first group of resource elements, wherein the reference element comprises a dedicated reference symbol (DRS) for use in channel estimation and demodulation; and in accordance with determining the user device will decode the further resource element using the reference element of the at least one of the resource elements of the first group of resource elements, transmitting, by the base station in a second slot of the subframe, a second group of resource elements, wherein at least one of the resource elements of the second group of resource elements corresponding with the at least one of the resource elements of the first group of resource elements does not comprise the reference element, and wherein the second group of resource elements has a lower DRS density than the first group of resource elements.