Method and apparatus for channel measurement and reporting in wireless communication system
The disclosure relates to a communication technique that converges a 5th generation (5G) or pre-5G communication system to support a higher data rate after a 4th generation (4G) communication system such as long-term evolution (LTE) with IoT technology, and a system thereof. The disclosure may be applied to intelligent services (e.g., smart home, smart building, smart city, smart or connected car, healthcare, digital education, retail, security and safety related services, etc.) based on 5G communication technology and IoT-related technology. According to various embodiments of the disclosure, a method and apparatus for operating a dormant cell in a wireless communication system may be provided.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a radio resource control (RRC) message including spatial relation information between a plurality of reference signals (RSs) and a sounding reference signal (SRS), and configuration information for the SRS, wherein at least one SRS is transmitted in a different time resource;
based on the spatial relation information, identifying a first downlink RS for a first time resource and a second downlink RS for a second time resource;
transmitting, to the base station, a first SRS on the first time resource based on the first downlink RS;
transmitting, to the base station, a second SRS on the second time resource based on the second downlink RS;
receiving, from the base station, a channel state information-reference signal (CSI-RS) on a third time resource based on a first transmission configuration indicator (TCI) state; and
receiving, from the base station, a CSI-RS on a fourth time resource based on a second TCI state,
wherein the third time resource includes the first time resource and the second time resource,
wherein the third time resource is allocated for a cross division duplex (XDD),
wherein the plurality of RSs includes the first downlink RS and the second downlink RS,
wherein the configuration information includes information on the first time resource associated with the first downlink RS and information on the second time resource associated with the second downlink RS,
wherein the RRC message includes quasi-co location (QCL) information between the CSI-RS and a plurality of TCI states including the first TCI state and the second TCI state, and
wherein the fourth time resource is allocated for a downlink reception.
2. The method of claim 1 , wherein the first downlink RS is associated with one or more first antenna ports of the base station, and
wherein the second downlink RS is associated with one or more second antenna ports of the base station.
3. The method of claim 1 , wherein the first TCI state is associated with one or more third antenna ports of the base station,
wherein the second TCI state is associated with one or more fourth antenna ports of the base station, and
wherein the one or more fourth antenna ports include the one or more third antenna ports.
4. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive, from a base station, a radio resource control (RRC) message including spatial relation information between a plurality of reference signals (RSs) and a sounding reference signal (SRS), and configuration information for the SRS, wherein at least one SRS is transmitted in a different time resource,
based on the spatial relation information, identify a first downlink RS for a first time resource and a second downlink RS for a second time resource,
transmit, to the base station, a first SRS on the first time resource based on the first downlink RS,
transmit, to the base station, a second SRS on the second time resource based on the second downlink RS,
receive, from the base station, a channel state information-reference signal (CSI-RS) on a third time resource based on a first transmission configuration indicator (TCI) state, and
receive, from the base station, a CSI-RS on a fourth time resource based on a second TCI state,
wherein the third time resource includes the first time resource and the second time resource,
wherein the third time resource is allocated for a cross division duplex (XDD),
wherein the plurality of RSs includes the first downlink RS and the second downlink RS,
wherein the configuration information includes information on the first time resource associated with the first downlink RS and information on the second time resource associated with the second downlink RS,
wherein the RRC message includes quasi-co location (QCL) information between the CSI-RS and a plurality of TCI states including the first TCI state and the second TCI state, and
wherein the fourth time resource is allocated for a downlink reception.
5. The terminal of claim 4 , wherein the first downlink RS is associated with one or more first antenna ports of the base station, and
wherein the second downlink RS is associated with one or more second antenna ports of the base station.
6. The terminal of claim 4 , wherein the first TCI state is associated with one or more third antenna ports of the base station,
wherein the second TCI state is associated with one or more fourth antenna ports of the base station, and
wherein the one or more fourth antenna ports include the one or more third antenna ports.
7. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a radio resource control (RRC) message including spatial relation information between a plurality of reference signals (RSs) and a sounding reference signal (SRS), and configuration information for the SRS, wherein at least one SRS is transmitted in a different time resource;
receiving, from the base station, a first SRS on a first time resource based on a first downlink RS;
receiving, from the base station, a second SRS on a second time resource based on a second downlink RS;
transmitting, to the terminal, a channel state information-reference signal (CSI-RS) on a third time resource based on a first transmission configuration indicator (TCI) state; and
transmitting, to the terminal, a CSI-RS on a fourth time resource based on a second TCI state,
wherein the first downlink RS for the first time resource and the second downlink RS for the second time resource are identified based on the spatial relation information,
wherein the third time resource includes the first time resource and the second time resource,
wherein the third time resource is allocated for a cross division duplex (XDD),
wherein the plurality of RSs includes the first downlink RS and the second downlink RS,
wherein the configuration information includes information on the first time resource associated with the first downlink RS and information on the second time resource associated with the second downlink RS,
wherein the RRC message includes quasi-co location (QCL) information between the CSI-RS and a plurality of TCI states including the first TCI state and the second TCI state, and
wherein the fourth time resource is allocated for a downlink transmission.
8. The method of claim 7 , wherein the first downlink RS is associated with one or more first antenna ports of the base station, and
wherein the second downlink RS is associated with one or more second antenna ports of the base station.
9. The method of claim 7 ,
wherein the first TCI state is associated with one or more third antenna ports of the base station,
wherein the second TCI state is associated with one or more fourth antenna ports of the base station, and
wherein the one or more fourth antenna ports include the one or more third antenna ports.
10. A base station in a wireless communication system, the base station comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
transmit, to a terminal, a radio resource control (RRC) message including spatial relation information between a plurality of reference signals (RSs) and a sounding reference signal (SRS), and configuration information for the SRS, wherein at least one SRS is transmitted in a different time resource,
receive, from the base station, a first SRS on a first time resource based on a first downlink RS,
receive, from the base station, a second SRS on a second time resource based on a second downlink RS,
transmit, to the terminal, a channel state information-reference signal (CSI-RS) on a third time resource based on a first transmission configuration indicator (TCI) state, and
transmit, to the terminal, a CSI-RS on a fourth time resource based on a second TCI state,
wherein the first downlink RS for the first time resource and the second downlink RS for the second time resource are identified based on the spatial relation information,
wherein the third time resource includes the first time resource and the second time resource,
wherein the third time resource is allocated for a cross division duplex (XDD),
wherein the plurality of RSs includes the first downlink RS and the second downlink RS,
wherein the configuration information includes information on the first time resource associated with the first downlink RS and information on the second time resource associated with the second downlink RS,
wherein the RRC message includes quasi-co location (QCL) information between the CSI-RS and a plurality of TCI states including the first TCI state and the second TCI state, and
wherein the fourth time resource is allocated for a downlink transmission.
11. The base station of claim 10 , wherein the first downlink RS is associated with one or more first antenna ports of the base station, and
wherein the second downlink RS is associated with one or more second antenna ports of the base station.
12. The base station of claim 10 , wherein the first TCI state is associated with one or more third antenna ports of the base station,
wherein the second TCI state is associated with one or more fourth antenna ports of the base station, and
wherein the one or more fourth antenna ports include the one or more third antenna ports.