Apparatus and method for controlling uplink transmission power in a multiple element carrier wave system

A communication apparatus comprising:

• a memory;
• and
• a processor operably coupled to the memory,
• wherein the processor, when executing program instructions stored in the memory, is configured to:
• generate an uplink signal to be transmitted on a first serving cell;
• generate a random access preamble to be transmitted on a second serving cell;
• calculate a summation of a first power for transmitting the uplink signal and a second power for transmitting the random access preamble;
• determine an adjusted power to transmit the uplink signal based on the summation of the first power and the second power;
• cause the communication apparatus to transmit, to an evolved-NodeB (eNB), the uplink signal on the first serving cell using the adjusted power;
• and
• cause the communication apparatus to transmit, to the eNB, the random access preamble on the second serving cell using the second power,
• wherein the adjusted power is determined by comparing the summation of the first power and the second power with a threshold value.

A device for a user equipment (UE) comprising:

• a memory;
• and
• a processor operably coupled to the memory,
• wherein the processor, when executing program instructions stored in the memory, is configured to:
• generate an uplink signal to be transmitted on a first serving cell;
• generate a random access preamble to be transmitted on a second serving cell;
• calculate a summation of a first power for transmitting the uplink signal and a second power for transmitting the random access preamble;
• determine an adjusted power to transmit the uplink signal based on the summation of the first power and the second power;
• cause the UE to transmit, to an evolved-NodeB (eNB), the uplink signal on the first serving cell using the adjusted power;
• and
• cause the UE to transmit, to the eNB, the random access preamble on the second serving cell using the second power,
• wherein the adjusted power is determined by comparing the summation of the first power and the second power with a threshold value.