Method and apparatus for controlling ue transmission power in wireless communication system
The disclosure relates to 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). 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.
1. A method performed by a first user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, a radio resource control (RRC) message including information related to sidelink transmission power;
determining sidelink transmission power, based on the information; and
transmitting a sidelink control channel and a sidelink data channel, based on the determined sidelink transmission power,
wherein the information includes at least one of downlink path loss-related information or sidelink path loss-related information, and
wherein the sidelink transmission power is determined based on P PSSCH (i)=min(P CMAX ,P MAX,CBR ,min(P PSSCH,D (i),P PSSCH,SL (i))) [dBm].
2. The method of claim 1 , wherein the determining of the sidelink transmission power comprises determining the sidelink transmission power, based on a minimum value between a first sidelink transmission power calculated based on the downlink path loss-related information and a second sidelink transmission power calculated based on the sidelink path loss-related information in case that the information includes both the downlink path loss-related information and the sidelink path loss-related information.
3. The method of claim 1 , further comprising:
transmitting a sidelink reference signal to a second UE; and
receiving, from the second UE, reference signals received power (RSRP) information which is measured based on the sidelink reference signal.
4. The method of claim 1 , wherein P MAX,CBR is set to be P CMAX in case that there is no setting related to the P MAX,CBR from the base station.
5. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a first user equipment (UE), a radio resource control (RRC) message including information related to sidelink transmission power; and
receiving, from the first UE, a sidelink control channel and a sidelink data channel, based on sidelink transmission power,
wherein the sidelink transmission power is determined based on the information, and
wherein the information includes at least one of downlink path loss-related information or sidelink path loss-related information, and
wherein the sidelink transmission power is determined based on P PSSCH (i)=min(P CMAX ,P MAX,CBR ,min(P PSSCH ,D(i),P PSSCH,SL (i))) [dBm].
6. The method of claim 5 , wherein, the sidelink transmission power is determined based on a minimum value between a first sidelink transmission power calculated based on the downlink path loss-related information and a second sidelink transmission power calculated based on the sidelink path loss-related information in case that the information includes both the downlink path loss-related information and the sidelink path loss-related information.
7. The method of claim 5 , wherein the first UE transmits a sidelink reference signal to a second UE, and receives reference signals received power (RSRP) information which is measured based on the sidelink reference signal.
8. The method of claim 5 , wherein P MAX,CBR is set to be P CMAX in case that there is no setting related to the P MAX,CBR from the base station.
9. A first user equipment (UE) comprising:
a transceiver configured to transmit or receive at least one signal; and
at least one processor coupled to the transceiver,
wherein the at least one processor is configured to:
receive, from a base station, a radio resource control (RRC) message including information related to sidelink transmission power,
determine sidelink transmission power, based on the information, and
transmit a sidelink control channel and a sidelink data channel, based on the determined sidelink transmission power, and
wherein the information includes at least one of downlink path loss-related information or sidelink path loss-related information, and
wherein the sidelink transmission power is determined based on P PSSCH (i)=min(P CMAX ,P MAX,CBR ,min(P PSSCH ,D(i),P PSSCH,SL (i))) [dBm].
10. The first UE of claim 9 , wherein the at least one processor is further configured to, determine the sidelink transmission power, based on a minimum value between a first sidelink transmission power calculated based on the downlink path loss-related information and a second sidelink transmission power calculated based on the sidelink path loss-related information in case that the information includes both the downlink path loss-related information and the sidelink path loss-related information.
11. The first UE of claim 9 , wherein the at least one processor is further configured to:
transmit a sidelink reference signal to a second UE, and
receive, from the second UE, reference signals received power (RSRP) information which is measured based on the sidelink reference signal.
12. The first UE of claim 9 , wherein P MAX,CBR is set to be P CMAX in case that there is no setting related to the P MAX,CBR from the base station.
13. A base station comprising:
a transceiver configured to transmit or receive at least one signal; and
at least one processor coupled to the transceiver,
wherein the at least one processor is configured to:
transmit, to a first user equipment (UE), a radio resource control (RRC) message including information related to sidelink transmission power, and
receive, from the first UE, a sidelink control channel and a sidelink data channel, based on sidelink transmission power,
wherein the sidelink transmission power is determined based on the information,
wherein the information includes at least one of downlink path loss-related information or sidelink path loss-related information, and
wherein the sidelink transmission power is determined based on P PSSCH (i)=min(P CMAX ,P MAX,CBR ,min(P PSSCH ,D(i),P PSSCH,SL (i))) [dBm].
14. The base station of claim 13 , wherein, the sidelink transmission power is determined based on a minimum value between a first sidelink transmission power calculated based on the downlink path loss-related information and a second sidelink transmission power calculated based on the sidelink path loss-related information in case that the information includes both the downlink path loss-related information and the sidelink path loss-related information.
15. The base station of claim 13 , wherein the first UE transmits a sidelink reference signal to a second UE, and receives reference signals received power (RSRP) information which is measured based on the sidelink reference signal.
16. The base station of claim 13 , wherein P MAX,CBR is set to be P CMAX in case that there is no setting related to the P MAX,CBR from the base station.