Method for determining uplink transmission power

A method for limiting uplink transmission power of a first user equipment (UE), the method performed by a base station (BS) and comprising:

• allocating, by a serving BS adjacent to a neighboring BS for serving a second UE using for an uplink transmission a frequency range of 2010 MHz through 2025 MHz, an uplink resource in a frequency range 1980 MHz through 2010 MHz or 1920 MHz through 2010 MHz to the first UE;
• and
• transmitting, from the BS to the first UE, a value of additional maximum power reduction (A-MPR) to protect the second UE,
• wherein the value of A-MPR is 11 dB or 15 dB.

A user equipment for transmitting uplink signals in a wireless communication system, the user equipment comprising:

• a radio frequency (RF) unit;
• and
• a processor operatively connected to the RF unit and configured to:
• configure the RF unit to use for uplink transmission a frequency range of 1980 MHz through 2010 MHz or 1920 MHz through 2010 MHz,
• receive a value of an additional maximum power reduction (A-MPR) from a serving base station (BS) adjacent to a neighboring BS for serving another UE using for an uplink transmission a frequency range of 2010 MHz through 2025 MHz;
• and
• transmit an uplink signal at an uplink transmission power calculated by using the value of A-MPR,
• wherein the value of the A-MPR is 11 dB or 15 dB.