Method for managing reference signal transmissions in a wireless system

A method, performed by a base station (BS), for managing downlink reference signal transmission in a wireless system, the method comprising:

• transmitting, by the BS, a plurality of configuration parameters for a first reference signal transmitted using a plurality of active ports and a second reference signal transmitted on a subset of active ports, wherein the plurality of configuration parameters includes at least one of a performance metric, a criteria for performance monitoring, and configuration settings for the first reference signal and the second reference signal;
• transmitting, by the BS in a first transmission occasion, at least one of the first reference signal and the second reference signal;
• receiving, from the UE, a feedback message based on the criteria for the performance monitoring;
• selecting, for a subsequent transmission occasion, one of the first reference signal, the second reference signal, or no reference signal, based on the received feedback message;
• and
• transmitting, by the BS in the subsequent transmission occasion, the selected one of the first reference signal, the second reference signal, or no reference signal.

A method of uplink reference signal transmission in a wireless communication system, the method comprising:

• receiving, by the UE, a plurality of configuration parameters for transmitting a first reference signal using a plurality of active ports and transmitting a second reference signal on a subset of the plurality of active ports;
• transmitting, by the UE, a first uplink transmission comprising at least one of the first reference signal and the second reference signal in a first transmission occasion;
• receiving, by the UE, an indication from a base station for transmitting at least one of the first reference signal and the second reference signal for a subsequent transmission occasion;
• and
• transmitting, by the UE, a subsequent uplink transmission comprising at least one of the first reference signal and the second reference signal in the subsequent transmission occasion based on the indication.

A method of uplink reference signal reception at a base station (BS) in a wireless communication system, the method comprising:

• transmitting, by the BS, a plurality of configuration parameters for transmitting a first reference signal using a plurality of active ports and transmitting a second reference signal on a subset of the plurality of active ports;
• receiving, by the BS, a first uplink transmission comprising at least one of the first reference signal and the second reference signal in a first transmission occasion;
• evaluating, by the BS, a performance on the first uplink transmission;
• determining one or more of the first reference signal and the second reference signal based on the evaluation;
• and
• transmitting, by the BS, an indication of one or more of the first reference signal and the second reference signal for a subsequent transmission occasion.