Methods and apparatus for related to a transmission and reception point
A communication method and a system for converging a 5 th -Generation (5G) communication system for supporting higher data rates beyond a 4 th -Generation (4G) system with a technology for Internet of Things (IoT) are provided. The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure discloses a method and apparatus for supporting transmission and reception to a plurality of TRPs, and a method and apparatus for updating PDSCH beam information of several serving cells together in a CA situation.
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 configuration information for configuring a cell group including a plurality of serving cells, the configuration information including first information for configuring a plurality of transmission configuration indicator (TCI) states associated with physical downlink shared channel (PDSCH) for each serving cell, and second information on at least one serving cell for which a TCI state is updated simultaneously by a medium access control (MAC) control element (CE), and the second information including a list of at least one cell identity (ID) for the at least of serving cell;
receiving, from the base station, the MAC CE including information bits corresponding to the plurality of TCI states and information indicating an ID of a first serving cell among the plurality of serving cells, wherein one bit of the information bits indicates an activation or a deactivation for each of the plurality of TCI states, and wherein the MAC CE indicates the activation for at least one TCI state among the plurality of TCI states;
identifying whether the first serving cell is included in the at least one serving cell based on the second information; and
in case that the first serving cell is included in the at least one serving cell, activating the at least one TCI state among the plurality of TCI states for all the at least one serving cell, respectively.
2. The method of claim 1 , further comprising:
activating the at least one TCI state among the plurality of TCI states for the first serving cell. in case that the first serving cell is not included in the at least one serving cell.
3. The method of claim 1 , further comprising:
receiving, from the base station, first downlink control information (DCI) scheduling a first PDSCH on the first serving cell, the first DCI including TCI information indicating a first TCI state for the first PDSCH from the at least one TCI state; and
receiving, from the base station, second DCI scheduling a second PDSCH on a second serving cell of the at least one serving cell, the second DCI including TCI information indicating a second TCI state for the second PDSCH from the at least one TCI state,
wherein the first PDSCH is received on the first serving cell based on the first TCI state, and the second PDSCH is received on the second serving cell based on the second TCI state.
4. The method of claim 1 , further comprising:
receiving, from the base station, a user equipment (UE) capability enquiry message; and
transmitting, to the base station, a UE capability information message including information indicating that the terminal supports simultaneous TCI update across multiple carriers.
5. The method of claim 4 , wherein frequency bands for the at least one serving cell are indicated to be supported by the terminal in the UE capability information message.
6. 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 configuration information for configuring a cell group including a plurality of serving cells, the configuration information including first information for configuring a plurality of transmission configuration indicator (TCI) states associated with physical downlink shared channel (PDSCH) for each serving cell, and second information on a at least one serving cell for which a TCI state is updated simultaneously by a medium access control (MAC) control element (CE), and the second information including a list of at least one cell identity (ID) for the at least of serving cell; and
transmitting, to the terminal, the MAC CE including information bits corresponding to the plurality of TCI states and information indicating an ID of a first serving cell among the plurality of serving cells, wherein one bit of the information bits indicates an activation or a deactivation for each of the plurality of TCI states, and wherein the MAC CE indicates the activation for at least one TCI state among the plurality of TCI states,
wherein, in case the first serving cell is included in the at least one serving cell, the at least one TCI state among the plurality of TCI states is activated for all the at least one serving cell, respectively.
7. The method of claim 6 , wherein, in case the first serving cell is not included in the at least one serving cell, the at least one TCI state among the plurality of TCI states is activated for the first serving cell.
8. The method of claim 6 , further comprising:
transmitting, to the terminal, first downlink control information (DCI) scheduling a first PDSCH on the first serving cell, the first DCI including TCI information indicating a first TCI state for the first PDSCH from the at least one TCI state; and
transmitting, to the terminal, second DCI scheduling a second PDSCH on a second serving cell of the at least one serving cell, the second DCI including TCI information indicating a second TCI state for the second PDSCH from the at least one TCI state,
wherein the first PDSCH is transmitted on the first serving cell based on the first TCI state, and the second PDSCH is transmitted on the second serving cell based on the second TCI state.
9. The method of claim 6 , further comprising:
transmitting, to the terminal, a user equipment (UE) capability enquiry message; and
receiving, from the terminal, a UE capability information message including information indicating that the terminal supports the-simultaneous TCI update across multiple carriers.
10. The method of claim 9 , wherein frequency bands for the at least one serving cell are indicated to be supported by the terminal in the UE capability information message.
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
control the transceiver to receive, from a base station, a radio resource control (RRC) message including configuration information for configuring a cell group including a plurality of serving cells, the configuration information including first information for configuring a plurality of transmission configuration indicator (TCI) states associated with physical downlink shared channel (PDSCH) for each serving cell, and second information on a list of at least one serving cell for which a TCI state is updated simultaneously by a medium access control (MAC) control element (CE), and the second information including a list of at least one cell identity (ID) for the at least of serving cell,
control the transceiver to receive, from the base station, the MAC CE including information bits corresponding to the plurality of TCI states and information indicating an ID of a first serving cell among the plurality of serving cells,
wherein one bit of the information bits indicates an activation or a deactivation for each of the plurality of TCI states, and wherein the MAC CE indicates the activation for at least one TCI state among the plurality of TCI states,
identify whether the first serving cell is included in the at least one serving cell, based on the second information, and
in case that the first serving cell is included in the at least one serving cell, activate the at least one TCI state among the plurality of TCI states for all the at least one serving cell, respectively.
12. The terminal of claim 11 , wherein the controller is further configured to activate the at least one TCI state among the plurality of TCI states for of the first serving cell, in case that the first serving cell is not included in the at least one serving cell.
13. The terminal of claim 11 ,
wherein the controller is further configured to control the transceiver to receive, from the base station, first downlink control information (DCI) scheduling a first PDSCH on the first serving cell, the first DCI including TCI information indicating a first TCI state for the first PDSCH from the at least one TCI state, and control the transceiver to receive, from the base station, second DCI scheduling a second PDSCH on a second serving cell of the at least one serving cell, the second DCI including TCI information indicating a second TCI state for the second PDSCH from the at least one TCI state, and
wherein the first PDSCH is received on the first serving cell based on the first TCI state, and the second PDSCH is received on the second serving cell based on the second TCI state.
14. The terminal of claim 11 , wherein the controller is further configured to:
control the transceiver to receive, from the base station, a user equipment (UE) capability enquiry message; and
control the transceiver to transmit, to the base station, a UE capability information message including information indicating that the terminal supports the simultaneous TCI update across multiple carriers.
15. The terminal of claim 14 , wherein frequency bands for the at least one serving cell are indicated to be supported by the terminal in the UE capability information message.
16. A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
control the transceiver to transmit, to a terminal, a radio resource control (RRC) message including configuration information for configuring a cell group including a plurality of serving cells, the configuration information including first information for configuring a plurality of transmission configuration indicator (TCI) states associated with physical downlink shared channel (PDSCH) for each serving cell, and second information on a list of at least one serving cell for which a TCI state is updated simultaneously by a medium access control (MAC) control element (CE), and the second information including a list of at least one cell identity (ID) for the at least of serving cell, and
control the transceiver to transmit, to the terminal, the MAC CE including information bits corresponding to the plurality of TCI states and information indicating an ID of a first serving cell among the plurality of serving cells, wherein one bit of the information bits indicates an activation or a deactivation for each of the plurality of TCI states, and wherein the MAC CE indicates the activation for at least one TCI state among the plurality of TCI states,
wherein, in case the first serving cell is included in the at least one serving cell, the at least one TCI state among the plurality of TCI states is activated for all the at least one serving cell, respectively.
17. The base station of claim 16 , wherein, in case the first serving cell is not included in the at least one serving cell, the at least one TCI state among the plurality of TCI states is activated for the first serving cell.
18. The base station of claim 16 ,
wherein the controller is further configured to control the transceiver to transmit, to the terminal, first downlink control information (DCI) scheduling a first PDSCH on the first serving cell, the first DCI including TCI information indicating a first TCI state for the first PDSCH from the at least one TCI state, and control the transceiver to transmit, to the terminal, second DCI scheduling a second PDSCH on a second serving cell of the at least one serving cell, the second DCI including TCI information indicating a second TCI state for the second PDSCH from the at least one TCI state, and
wherein the first PDSCH is transmitted on the first serving cell based on the first TCI state, and the second PDSCH is transmitted on the second serving cell based on the second TCI state.
19. The base station of claim 16 , wherein the controller is further configured to:
control the transceiver to transmit, to the terminal, a user equipment (UE) capability enquiry message; and
control the transceiver to receive, from the terminal, UE capability information message including information indicating that the terminal supports simultaneous TCI update across multiple carriers.
20. The base station of claim 19 , wherein frequency bands for the at least one serving cell are indicated to be supported by the terminal in the UE capability information message.