Power headroom report method and apparatus

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

• receiving, from a terminal, a first type power headroom report (PHR) or a second type PHR, wherein, in case that a scheduling information for a physical uplink shared channel (PUSCH) transmission is transmitted to the terminal, the first type PHR is received, and wherein, in case that the scheduling information for the PUSCH transmission is not transmitted to the terminal, the second type PHR is received;
• and
• if the terminal is configured with at least two serving cells including a first serving cell and a second serving cell that have different slot lengths, receiving on a timeslot of the first serving cell, a PHR for a timeslot of the second serving cell,
• wherein the first type PHR comprises a power headroom (PH) obtained based on the scheduling information for the PUSCH transmission,
• wherein the second type PHR comprises a PH obtained based on a default configuration, and
• wherein the timeslot of the second serving cell is a first of a plurality of time slots of the second serving cell that fully overlaps with one timeslot of the first serving cell.

A terminal in a wireless communication system comprising:

• a transceiver;
• and
• at least one processor operatively coupled with the transceiver,
• wherein the at least one processor is configured to:
• control the terminal to determine whether to report a first type power headroom report (PHR) or a second type PHR, based on a scheduling information for a physical uplink shared channel (PUSCH) transmission,
• control the transceiver to transmit, to a base station, the first type PHR, in case that the scheduling information for the PUSCH transmission is received by the terminal,
• control the transceiver to transmit, to the base station, the second type PHR, in case that the scheduling information for the PUSCH transmission is not received by the terminal, and
• if the terminal is configured with at least two serving cells including a first serving cell and a second serving cell that have different slot lengths, control the transceiver to transmit, on a timeslot of the first serving cell, a PHR for a timeslot of the second serving cell,
• wherein the first type PHR comprises a power headroom (PH) obtained based on the scheduling information for the PUSCH transmission, the second type PHR comprises a PH obtained based on a default configuration, and the timeslot of the second serving cell is a first of a plurality of time slots of the second serving cell that fully overlaps with one timeslot of the first serving cell.

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

• a transceiver;
• and
• at least one processor operatively coupled with the transceiver,
• wherein the at least one processor is configured to:
• control the transceiver to receive, from a terminal, a first type power headroom report (PHR) or a second type PHR, wherein, in case that a scheduling information for a physical uplink shared channel (PUSCH) transmission is transmitted to the terminal, the first type PHR is received, and wherein, in case that the scheduling information for the PUSCH transmission is not transmitted to the terminal, the second type PHR is received, and
• if the terminal is configured with at least two serving cells including a first serving cell and a second serving cell that have different slot lengths, control the transceiver to receive on a timeslot of the first serving cell, a PHR for a timeslot of the second serving cell,
• wherein the first type PHR comprises a power headroom (PH) obtained, based on the scheduling information for the PUSCH transmission, the second type PHR comprises a PH obtained, based on a default configuration, and
• wherein the timeslot of the second serving cell is a first of a plurality of time slots of the second serving cell that fully overlaps with one timeslot of the first serving cell.