Methods and apparatus for UE power saving using TRS and CSIRS configurations in wireless communication system
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system is provided. The method includes receiving, from a base station, a configuration information for at least one of a tracking reference signal (TRS) configuration or a channel state information-reference signal (CSI-RS) configuration, and receiving, from the base station, at least one of a TRS or a CSI-RS based on the configuration information. At least one of the TRS or the CSI-RS is received when the terminal is in an idle mode or an inactive mode.
1 . A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station system information including one or more configurations of reference signal (RS) for tracking to be used in idle or inactive mode; and
receiving, from the base station, a downlink control information (DCI) format for paging early indication including a bitmap indicating presence of at least one of the one or more configurations of RS for tracking;
receiving, from the base station, an RS for tracking based on the DCI format for paging early indication; and
performing time or frequency tracking based on the RS for tracking.
2 . The method of claim 1 , wherein the receiving of the system information comprises:
receiving, from the base station, a system information block 1 (SIB1) including scheduling information for the system information; and
receiving, from the base station, the system information based on the scheduling information.
3 . The method of claim 1 , further comprising receiving, from the base station, a short message including at least one bit to represent a change of the system information that includes the one or more configurations of RS for tracking.
4 . The method of claim 1 , wherein the one or more configurations of RS for tracking include at least one of:
information on a scrambling identity,
information on a first orthogonal frequency division multiplexing (OFDM) symbol in time domain,
information on a starting physical resource block,
information on a number of physical resource blocks,
information on a synchronization signal block (SSB) with quasi-collocation (QCL) information,
information on a periodicity and offset, or
information on a frequency domain allocation.
5 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, system information including one or more configurations of reference signal (RS) for tracking to be used in idle or inactive mode; and
transmitting, to the terminal, a downlink control information (DCI) format for paging early indication including a bitmap indicating presence of at least one of the one or more configurations of RS for tracking; and
transmitting, to the terminal, an RS for tracking according to the DCI format for paging early indication.
6 . The method of claim 5 , wherein the transmitting of the system information comprises:
transmitting, to the terminal, a system information block 1 (SIB1) including scheduling information for the system information; and
transmitting, to the terminal, the system information according to the scheduling information.
7 . The method of claim 5 , further comprising transmitting, to the terminal, a short message including at least one bit to represent a change of the system information that includes the one or more configurations of RS for tracking,
wherein the one or more configurations of RS for tracking include at least one of:
information on a scrambling identity,
information on a first orthogonal frequency division multiplexing (OFDM) symbol in time domain,
information on a starting physical resource block,
information on a number of physical resource blocks,
information on a synchronization signal block (SSB) with quasi-collocation (QCL) information,
information on a periodicity and offset, or
information on a frequency domain allocation.
8 . A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, from a base station via the transceiver, system information including one or more configurations of reference signal (RS) for tracking to be used in idle or inactive mode,
receive, from the base station via the transceiver, a downlink control information (DCI) format for paging early indication including a bitmap indicating presence of at least one of the one or more configurations of RS for tracking,
receive, from the base station via the transceiver, an RS for tracking based on the DCI format for paging early indication, and
perform time or frequency tracking based on the RS for tracking.
9 . The terminal of claim 8 , wherein the controller is further configured to:
receive, from the base station via the transceiver, a system information block 1 (SIB1) including scheduling information for the system information, and
receive, from the base station via the transceiver, the system information based on the scheduling information.
10 . The terminal of claim 8 , wherein the controller is further configured to receive, from the base station via the transceiver, a short message including at least one bit to represent a change of the system information that includes the one or more configurations of RS for tracking.
11 . The terminal of claim 8 , wherein the one or more configurations of RS for tracking include at least one of:
information on a scrambling identity,
information on a first orthogonal frequency division multiplexing (OFDM) symbol in time domain,
information on a starting physical resource block,
information on a number of physical resource blocks,
information on a synchronization signal block (SSB) with quasi-collocation (QCL) information,
information on a periodicity and offset, or
information on a frequency domain allocation.
12 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
transmit, to a terminal via the transceiver, system information including one or more configurations of reference signal (RS) for tracking to be used in idle or inactive mode,
transmit, to the terminal via the transceiver, a downlink control information (DCI) format for paging early indication including a bitmap indicating presence of at least one of the one or more configurations of RS for tracking, and
transmit, to the terminal via the transceiver, an RS for tracking according to the DCI format for paging early indication.
13 . The base station of claim 12 , wherein the controller is further configured to:
transmit, to the terminal, a system information block 1 (SIB1) including scheduling information for the system information, and
transmit, to the terminal, the system information according to the scheduling information.
14 . The base station of claim 12 , wherein the controller is further configured to transmit, to the terminal via the transceiver, a short message including at least one bit to represent a change of the system information that includes the one or more configurations of RS for tracking.
15 . The base station of claim 12 , wherein the one or more configurations of RS for tracking include at least one of:
information on a scrambling identity,
information on a first orthogonal frequency division multiplexing (OFDM) symbol in time domain,
information on a starting physical resource block,
information on a number of physical resource blocks,
information on a synchronization signal block (SSB) with quasi-collocation (QCL) information,
information on a periodicity and offset, or
information on a frequency domain allocation.