Power adaptation apparatus and power adaptation method for controlling uplink/downlink power

摘要

A power adaptation apparatus for a wireless communication channel includes a power ratio compensator. The power ratio compensator is capable of receiving a channel quality indicator and compensating a power ratio parameter according to the channel quality indicator, wherein the power ratio parameter defines a relation between power of the wireless communication channel and power of another wireless communication channel, and is referenced for setting the power of the wireless communication channel.

主权项

1. A power adaptation apparatus for a wireless communication channel, comprising:
a channel quality estimator, generating a channel quality indicator by estimating block error rate of an enhanced dedicated channel (E-DCH) according to a percentage of acknowledgement indicators (ACK) or negative acknowledgement indicators (NACK) during a specific number of transmission time intervals; and a power ratio compensator, receiving the channel quality indicator and compensating a power ratio parameter according to the channel quality indicator, wherein the power ratio parameter defines a ratio of gain factor of the wireless communication channel to gain factor of another wireless communication channel, and is referenced for setting the power of the wireless communication channel, wherein the power ratio compensator compensates the power ratio parameter by changing the gain factor of the wireless communication channel within a tolerance range, wherein the power ratio compensator includes a plurality of states and a plurality of adjustments to the power ratio parameter, each state from the plurality of states is associated with an adjustment from the plurality of adjustments to the power ratio parameter, and the particular state of the plurality of states is determined based upon the percentage of acknowledgement indicators (ACK) or negative acknowledgement indicators (NACK) exceeding a threshold plus an amount of hysteresis during the specific number of transmission time intervals.