Combined open loop/closed loop (CQI-based) uplink transmit power control with interference mitigation for E-UTRA

摘要

A combined open loop and closed loop (channel quality indicator (CQI)-based) transmit power control (TPC) scheme with interference mitigation for a long term evolution (LTE) wireless transmit/receive unit (WTRU) is disclosed. The transmit power of the WTRU is derived based on a target signal-to-interference noise ratio (SINR) and a pathloss value. The pathloss value pertains to the downlink signal from a serving evolved Node-B (eNodeB) and includes shadowing. An interference and noise value of the serving eNodeB is included in the transmit power derivation, along with an offset constant value to adjust for downlink (DL) reference signal power and actual transmit power. A weighting factor is also used based on the availability of CQI feedback.

主权项

1. A wireless transmit/receive unit (WTRU) comprising:
circuitry configured to receive a downlink control message, the downlink control message comprising uplink scheduling information, wherein the uplink scheduling information comprises modulation and coding set (MCS) information and transmit power control (TPC) information; the circuitry further configured to measure pathloss based on a received signal; the circuitry further configured to determine a transmit power level for a physical uplink channel based on at least the measured pathloss, the TPC information, the MCS information, and a predetermined weighting factor, wherein the predetermined weighting factor has a value from 0 to 1; and the circuitry further configured to output a signal based on the uplink scheduling information and the determined transmit power level for transmission on a physical uplink channel.