Method for noise floor and interference estimation
First Claim
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.
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Accused Products
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.
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Citations
18 Claims
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1. A method for neighbor cell interference estimation comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A node in a wireless communication system, comprising
one or more measurement circuits for measuring the total uplink power per subset of tones, and for measuring the own-channel power per the same subset of tones; -
a combining circuit for 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 and combining for all subsets of tones the auxiliary power quantities to obtain a total auxiliary wideband power for the entire uplink band; a calculation circuit for calculating a thermal noise floor measure based on said combined auxiliary power quantity; a processing circuit for obtaining a neighbor cell interference measure for each subset of tones from at least said noise floor measure for each subset of tones by dividing said calculated thermal noise floor measure into sub noise floor measures for each subset of tones; and a signaling circuit for signaling said measure to another function in said node or another node in said wireless communication system.
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Specification