Methods and apparatuses for transmission power control

摘要

The disclosure relates to methods and apparatuses that facilitate power and quality control of uplink MIMO transmissions. A method in a NodeB comprises controlling (50) transmission power of multiple pilot signals transmitted by a user equipment by using a single inner power control loop operating on at least one pilot signal of the multiple pilot signals. Some disclosed embodiments also relate to adjustment (60) of a quality target applied by the single inner power control loop and to updating (71, 72) of a power offset for computing the number of bits that the user equipment can transmit on a stream that is associated with a pilot signal that is not power controlled by the single inner power control loop.

主权项

1. A method in a NodeB configured for controlling transmission power of a user equipment configured for uplink Multiple-Input Multiple-Output (MIMO) transmissions, wherein the user equipment transmits a first pilot signal associated with a first MIMO stream and a second pilot signal associated with a second MIMO stream, the method comprising controlling transmission power of said first and second pilot signals by using a single inner power control loop operating on at least one pilot signal of said first and second pilot signals, wherein said single inner power control loop comprises:
generating transmit power control commands, wherein quality of said at least one pilot signal and a quality target are considered when generating the transmit power control commands; and transmitting, to the user equipment, said transmit power control commands to adjust the transmit power of said at least one pilot signal so that the quality of said at least one pilot signal meets the quality target.