US 2019/0158237 A1 · NETWORK NODE AND METHOD FOR MANAGING TRANSMISSION OF CELL REFERENCE SYMBOLS

Abstract

A method performed by a network node for managing transmission of Cell Reference Symbols, CRS, wherein the network node 110 operates one or more cells and the network node 110 is configured to transmit the CRS in a first bandwidth mode. When the network node 110 has identified a cell 130 which is not actively serving any UEs 120, also referred to as an empty cell, the network node 110 applies (302) a reduced CRS bandwidth mode in the first cell 130 in relation to the first bandwidth mode. By applying (302) a reduced CRS bandwidth mode in the empty cell 130, the overall interference of the CRS from the empty cell 130 is reduced, thereby enhancing the performance in cells actively serving UEs 120.

Claims13

Dependent claims

A method performed by a network node for managing transmission of Cell Reference Symbols (CRS), the method comprising:

applying a first CRS bandwidth mode with respect to a first subframe,
determining that a first cell is not actively serving any user equipments (UEs);
after determining that the first cell is not actively serving any UEs, applying a second CRS bandwidth mode on CRS which are transmitted in the first cell, wherein
in the second CRS bandwidth mode the bandwidth is reduced in relation to the first CRS bandwidth mode, and
the second CRS bandwidth mode is applied on CRS which are sent in any subframe, except in subframes in which the network node transmits system information, paging or random access response messages or assumes the UE to perform measurements.

2 more elements

Dependencies are inferred from the claim text.

Network node and method for managing transmission of cell reference symbols

Life of this patent

Network node and method for managing transmission of cell reference symbols

Life of this patent

Abstract

Claims13