Determining the Repeater Gain in Dependence of Interference
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJiansong Gan, Pål Frenger, Yin Liu, Zhang Zhang
Life of this patent
Estimating the term…
Abstract
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.
Claims24
1-21. (canceled)
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.
A method implemented by a repeater of a communications system for amplifying and retransmitting a signal received from a first node so that the amplified signal can be detected by a second node, the method comprising adjusting a repeater gain used for amplification of said signal in accordance with a desired repeater gain value that has been determined in dependence on an estimate of interference experienced by the repeater and an estimate of interference experienced by the second node, and under the 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.
A repeater in a communications system configured to amplify and retransmit a signal received from a first node so that the amplified signal can be detected by a second node, the repeater comprising a repeater gain adjustment circuit configured to adjust a repeater gain for amplification of the signal in accordance with a desired repeater gain value that has been determined in dependence on an estimate of interference experienced by the repeater and an estimate of interference experienced by the second node, and under the 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.
A radio base station in a radio communications system configured to receive a signal that has been amplified by a repeater, wherein the radio base station comprises:
- a repeater gain determination circuit configured to determine 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
- a set gain command transmit circuit configured to transmit, to the repeater, a set gain command that comprises an instruction on how to adjust a repeater gain of the repeater in accordance with the desired repeater gain value.
A radio communications system comprising a repeater configured to amplify and retransmit a signal received from a first node so that the amplified signal can be detected by a second node, the repeater comprising a repeater gain adjustment circuit configured to adjust a repeater gain used for amplification of the signal in accordance with a desired repeater gain value that has been determined in dependence on an estimate of interference experienced by the repeater and an estimate of interference experienced by the second node, and under the 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.
A computer program product stored on a computer readable medium and comprising computer program code that, when executed by a processor of a node in a radio communications system, cause the node to determine a desired value for a gain of a repeater in the system in dependence on an estimate of interference experienced by the repeater and an estimate of interference experienced by a node that is to receive a signal amplified by the repeater, 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
Dependencies are inferred from the claim text.