Controllable CSI-RS density

A method of obtaining, in a wireless device, a configuration of a reference signal resource, the method comprising:

• receiving an indication, from a network node, of a combination of a plurality of components contained in a plurality of physical resource blocks of a slot;
• and
• using the indicated combination of the plurality of components for a reference signal resource,
• wherein the indication includes a bitmap, each bit in the bitmap indicating whether a component located at a corresponding subcarrier index of each of the plurality of physical resource blocks is part of the combination of the plurality of components used for the reference signal resource.

A user equipment (UE) for facilitating communications in a wireless communication network by obtaining an indication of a reference signal resource in the wireless communication network, the UE comprising:

• an antenna configured to send and receive wireless signals;
• a transceiver connected to the antenna and to processing circuitry, and configured to condition signals communicated between the antenna and the processing circuitry;
• the processing circuitry being configured to:
• receive an indication, from a network node, of a combination of a plurality of components contained in a plurality of physical resource blocks of a slot;
• and
• use the indicated combination of the plurality of components for a reference signal resource,
• wherein the indication includes a bitmap, each bit in the bitmap indicating whether a component located at a corresponding subcarrier index is part of the combination of the plurality of components used for the reference signal resource.

A network node configured for operation in a wireless communication network and for configuring a reference signal resource in the wireless communication network, the network node comprising:

• an antenna configured to send and receive wireless signals;
• a transceiver connected to the antenna and to processing circuitry, and configured to condition signals communicated between the antenna and the processing circuitry;
• the processing circuitry being configured to:
• obtain a combination of a plurality of components to be used for a reference signal resource, the plurality of components being contained in a plurality of physical resource blocks of a slot;
• and
• indicate, to one or more wireless devices, the combination of the plurality of components in the one or more physical resource blocks that are to be used for the reference signal resource,
• wherein the indication includes a bitmap, each bit in the bitmap indicating whether a component located at a corresponding subcarrier index of each of the plurality of physical resource blocks is part of the combination of the plurality of components used for the reference signal resource.