Determining the repeater gain in dependence of interference

摘要

A method of operating a repeater in a communications system is disclosed, wherein a repeater gain to be used for the amplification of a signal is adjusted in dependence on an estimate of an interference by the repeater and by the receiver. The interference at the receiver is feed back to the relay node.

主权项

1. A method of performing transmission power control in a communications system that comprises a first node, a second node, and a repeater configured to receive a signal from the first node, amplify the signal, and retransmit the amplified signal so that the amplified signal can be detected by the second node, the method comprising:
determining a desired repeater gain value for amplification of the signal, in dependence on an estimate of interference experienced by the repeater and an estimate of interference experienced by the second node, and under constraints that the desired repeater gain value be below or equal to a maximum gain of the repeater and that a power of the repeater be below or equal to a maximum power of the repeater; and transmitting, from the second node to the repeater, a set gain command signal that includes information on how a repeater gain of the repeater is to be adjusted in accordance with the determined desired repeater gain value.