A method for providing tracking reference signal (TRS) availability information to idle mode or inactive mode user equipment (UE) is proposed to enhance the TRS-based power saving design. A UE operates in an idle mode or an inactive mode of communication with a wireless communication network, and receives a system information block (SIB) from the wireless communication network when the UE is operating in the idle mode or the inactive mode. The received SIB includes TRS configuration. The UE determines whether a TRS is present on a TRS occasion indicated by the TRS configuration based on TRS availability information signaled from the wireless communication network, and receives the TRS from the wireless communication network in response to determining that the TRS is present.