Apparatus and method for reporting transmission power, and apparatus and method for determining transmission power

An apparatus for determining transmission power comprising:

• a reception unit receiving a transmission power normalized at a reference Modulation and Coding Scheme (MCS) level from a terminal;
• a headroom calculation unit calculating power headroom corresponding to respective MCS levels by using the normalized transmission power and a maximum transmission power of the terminal;
• and
• a scheduler determining at least one of a transmission power of the terminal, a size of uplink data to be allocated to the terminal, and an MCS level of the terminal, on the basis of the power headroom corresponding to the respective MCS levels,
• wherein the normalized transmission power is a result value which is obtained by summing the transmission power and a difference value between Carrier to Interference Noise Ratio (CINR) of a current MCS level and CINR of a reference MCS level, and the current MCS level is an MCS level of a burst which is intended to comprise a transmission power report of the terminal.

A method for reporting transmission power comprising:

• acquiring a transmission power at a current Modulation and Coding Scheme (MCS) level, which is an MCS level of a burst intended to comprise a transmission power report of a terminal;
• normalizing the transmission power at the current MCS level into a transmission power at a reference MCS level;
• and
• transmitting a transmission power report of the terminal with the normalized transmission power defined therein, to a base station,
• wherein the normalizing of the transmission power comprises:
• acquiring CINR of the current MCS level from a normalized C/N table;
• calculating a difference value between the CINR of the current MCS level and CINR of the reference MCS level;
• and
• summing the difference value and the transmission power.

A method for determining transmission power comprising:

• calculating a power headroom corresponding to respective MCS levels by using a maximum transmission power of a terminal and a transmission power normalized at a reference Modulation and Coding Scheme (MCS) level, when a transmission power report with the normalized transmission power defined therein is received;
• and
• determining at least one of a transmission power of the terminal, a size of uplink data to be allocated to the terminal, and an MCS level of the terminal, on the basis of the power headroom corresponding to the respective MCS levels,
• wherein the calculating of the power headroom comprises:
• acquiring the maximum transmission power;
• acquiring CINR corresponding to the respective MCS levels and CINR of the reference MCS level from a normalized C/N table;
• and
• calculating the power headroom corresponding to the respective MCS levels by summing the transmission power and a difference value between the CINR corresponding to the respective MCS levels and the CINR of the reference MCS level and subtracting the summed result value from the maximum transmission power.