Method for noise floor and interference estimation

Patent metadata

Field	Value
Publication number	US-9071359-B2
Application number	US-66697907-A
Country	US
Kind code	B2
Filing date	Jun 29, 2007
Priority date	Jun 29, 2007
Publication date	Jun 30, 2015
Grant date	Jun 30, 2015

Abstract

The present invention relates to a method and arrangement in a wireless communication system, e.g. an evolved UMTS Terrestrial Radio Access Network, for improved scheduling and admission control of the uplink by providing an improved determining of power-related quantities, e.g. neighbor cell interference levels, for specific tones and providing more accurate determination of noise-related quantities, e.g. noise floor power estimates, for specific tones. The method and arrangement obtains a neighbor cell interference measure for each subset of tones from at least a noise floor measure for each subset of tones based on combined power quantities from the total uplink power per subset of tones and dividing said noise floor measure into sub noise floor measures for each subset of tones, said dividing dependent on the bandwidth of each subset of tones.

First claim

The invention claimed is:

1. A method for neighbor cell interference estimation comprising:
measuring a total uplink power per subset of tones;
measuring a own-channel power per the same subset of tones;
calculating an auxiliary power quantity for each subset of tones as the total uplink power per subset of tones minus the own-channel power per subset of tones minus the leakage of power from other subsets of tones;
combining the auxiliary power quantities for all subsets of tones to obtain a total auxiliary wideband power for the entire uplink band;
calculating a thermal noise floor measure based on said total auxiliary wideband power quantity; and
dividing said calculated thermal noise floor measure into sub noise floor measures for each subset of tones, said dividing dependent on the bandwidth of each subset of tones, for obtaining a neighbor cell interference measure for each subset of tones from at least said sub noise floor measures.

2. The method of claim 1 , wherein
the step of combining comprises an addition of the auxiliary power quantities for all subsets of tones; and
the step of calculating the thermal noise floor measure comprises storing the auxiliary power samples in a sliding window and calculating the minimum j of power samples in said sliding window;
wherein the neighbor cell interference is calculated by scaling the noise floor measure for each of the subsets of tones and calculating the auxiliary power quantity minus the scaled noise floor measure for each subset.

3. The method of claim 2 , comprising the step of signaling one or more of the estimated parameters for each subset of tones for
the sum of all contributions of emitted radio frequency power of mobile terminals in neighboring cells,

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4. The method of claim 2 , whereby said leakage of power is calculated from all channel powers corresponding to other subsets of tones in the own cell.

5. The method of claim 4 , whereby said leakage power is calculated according to

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Assignees

• Wigren Torbjorn
• Ericsson Telefon Ab L M

Inventors

• Wigren Torbjorn

Classifications

• H04B17/345 Primary

  Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) · CPC title

• H04B17/382

  for resource allocation, admission control or handover · CPC title

• H04B17/354

  Adjacent channel leakage power · CPC title