Method and apparatus for reporting maximum transmission power in wireless communication

A method performed by a base station in a wireless communication system, the method comprising:

• determining which type of a power headroom (PH) report (PHR) format of a terminal from among a first type PHR format and a second type PHR format to be configured, the first type PHR format including a PH field and a maximum transmission power (PCMAX) field, and the second type PHR format including a PH field without a PCMAX field;
• transmitting, to the terminal, first control information for configuring the type of PHR to the first type PHR, in case that the first type PHR format is determined to be configured;
• receiving, from the terminal, a PHR based on the first type PHR format;
• and
• performing scheduling for the terminal based on the PHR,
• wherein the received PHR includes a first PH, a first PCMAX, a second PH, and a second PCMAX, in case that a simultaneous transmission of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) is configured,
• wherein the first PH is associated with a transmit power for the PUSCH and the second PH is associated with a transmit power for the simultaneous transmission of the PUCCH and the PUSCH, and
• wherein the first PH is based on the first PCMAX and the second PH is based on the second PCMAX.

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, first control information for configuring a type of a power headroom (PH) report (PHR) format from among a first type PHR format and a second type PHR format, the first type PHR format including a PH field and a maximum transmission power (PCMAX) field, and the second type PHR format including a PH field without a PCMAX field,
• detect a PHR triggering event,
• determine whether the configured type of the PHR format is the first type PHR format or the second type PHR format based on the first control information, and
• transmit, to the base station via the transceiver, a PHR based on the first type PHR format, in case that the configured type is determined to be the first type PHR format,
• wherein the transmitted PHR includes a first PH, a first PCMAX, a second PH, and a second PCMAX, in case that a simultaneous transmission of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) is configured,
• wherein the first PH is associated with a transmit power for the PUSCH and the second PH is associated with a transmit power for the simultaneous transmission of the PUCCH and the PUSCH, and
• wherein the first PH is based on the first PCMAX and the second PH is based on the second PCMAX.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• determine which type of a power headroom (PH) report (PHR) format of a terminal from among a first type PHR format and a second type PHR format to be configured, the first type PHR format including a PH field and a maximum transmission power (PCMAX) field, and the second type PHR format including a PH field without a PCMAX field,
• transmit, to the terminal via the transceiver, first control information for configuring the type of PHR to the first type PHR, in case that the first type PHR format is determined to be configured,
• receive, from the terminal via the transceiver, a PHR based on the first type PHR format, and
• performing scheduling for the terminal based on the PHR,
• wherein the received PHR includes a first PH, a first PCMAX, a second PH, and a second PCMAX, in case that a simultaneous transmission of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) is configured,
• wherein the first PH is associated with a transmit power for the PUSCH and the second PH is associated with a transmit power for the simultaneous transmission of the PUCCH and the PUSCH, and
• wherein the first PH is based on the first PCMAX and the second PH is based on the second PCMAX.