User Manual

90 Extreme CPE Product Manual
Chapter 9 - ATPC
9.3 ATPC Configuration
The Multi rate and ATPC Parameters page enables the user to view the
transmission (Tx) and reception (Rx) power levels, their optimum levels, radio
band, and allows enabling or disabling of the ATPC feature, as well as setting of
the the transmission power level.
Once enabled the ATPC feature implements a power control algorithm for the
WiMAX network. The result of applying ATPC is that every node knows the proper
transmission power level to use for each of its neighbours, and every node
maintains good link qualities with its neighbours by dynamically adjusting the
transmission power through on-demand feedback packets.
Uniquely, ATPC adopts a feedback-based and pairwise transmission power
control. By collecting the link quality history, ATPC builds a model for each
neighbor of the node. This model represents an in-situ correlation between
transmission power levels and link qualities. With such a model, ATPC tunes the
transmission power according to monitored link quality changes. The changes of
transmission power level reflect changes in the surrounding environment.
Figure 9-36: ATPC - Configuration
MULTI RATE / ATPC – The Multi rate and ATPC Parameters page displays
information on the transmitted and received signals, allows enabling of the ATPC
algorithm and setting of the transmission power level.
 Last Tx Rate – Describes the last transmission power rate.
 Optimal Rx Rate – Describes the optimal receive signal stregth.