PREAMBLE BASED UPLINK POWER CONTROL FOR LTE

摘要

Systems and methodologies are described that facilitate utilizing power control preambles with closed loop power control techniques in a wireless communication environment. An uplink grant can be transferred over a downlink (e.g., a first uplink grant after uplink inactivity), and a power control preamble can be sent over an uplink in response to the uplink grant. According to an example, transmission of the power control preamble can be explicitly scheduled and/or implicitly scheduled. The power control preamble can be transmitted at a power level determined by an access terminal utilizing an open loop power control mechanism. A base station can analyze the power control preamble and generate a power control command based thereupon to correct the power level employed by the access terminal. The access terminal can thereafter utilize the power control command to adjust the power level for uplink data transmission.

主权项

1. A method that facilitates evaluating power control preambles for employment with power control in a wireless communication environment, comprising:
transmitting an uplink grant to an access terminal; receiving a power control preamble sent from the access terminal at a power level set based upon open loop power control; generating a power control command based upon an analysis of the power control preamble, wherein the power control command corrects the power level of the access terminal, and wherein the power control preamble is based on a Sounding Reference Signal (SRS) transmission; transmitting the power control command to the access terminal; and receiving an uplink data transmission sent from the access terminal at the corrected power level.