OFDMA Uplink Interface Impact Recovery in LTE System
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsTorbjorn Wigren, Bo Goransson
Life of this patent
Estimating the term…
Abstract
The present invention relates to methods and arrangements to estimate neighbour cell interference for admission control purposes. Information on at least the total estimated neighbour cell interference power and the own cell power for frequency subsets of tones ft is signalled to neighbouring cells for calculating a vector of impact values describing the interference impact of transmissions in a first impacting cell on respective impacted neighbour cells. The neighbour cell interference impact caused by a resource allocation in a first cell is estimated by help of the pre-calculated impact values such that resources are allocated to cause a minimised interference impact on said neighbouring cells.
Claims12
1-11. (canceled)
A method in a unit connected to or integrated in a base transceiver station of a communication system, said base transceiver station serving a first cell being part of a cluster of neighbouring cells served by base transceiver stations, said method for determining impact values for transmissions in said first cell on the interference in neighbouring cells of said cluster, and said method comprising:
- signalling information on at least the total estimated neighbour cell interference power PfiNeighbour and the own cell power PfiOwn for frequency subsets of tones fi to neighbouring cells in said cluster;
- and
- calculating for each frequency subset of tones fi a vector of impact values kfi from at least a regression vector comprising received values of the own cell powers PfiOwn of neighbouring cells in said cluster and from received values of said estimated neighbour cell interference power PfiNeighbour, whereby each impact value describes the interference impact of transmissions in said first cell on a respective other cell in said cluster.
A method in a unit connected to or integrated in a base transceiver station of a communication system, said base transceiver station serving a first cell being part of a cluster of neighbouring cells served by base transceiver stations, said method for estimating the interference impact on the other cells of said cluster when performing a resource scheduling on one of a frequency subset of tones fi for a user equipment (UE) transmission, and said method comprising:
- estimating the neighbour cell interference impact of a resource allocation for each frequency subset of tones fi in said first cell from the sum of the reported total estimated own cell power of said neighbouring cells weighted with a pre-calculated impact value specific for the impacting cell and each corresponding impacted cell and the tentatively scheduled cell power due to said UE transmission;
- and
- allocating resources for the UE transmission to the frequency subset having a minimised interference impact on said neighbouring cells.
A unit connected to or integrated in a base transceiver station of a communication system, said base transceiver station serving a first cell being part of a cluster of neighbouring cells served by radio base stations, said unit adapted for determining impact values for transmissions in said first cell on the interference in neighbouring cells of said cluster, and said unit comprising:
- a first processor adapted to provide information on at least the total estimated neighbour cell interference power PfiNeighbour and the own cell power PfiOwn for frequency subsets of tones fi for signalling to neighbouring cells in said cluster;
- a second processor adapted to provide information on at least the total estimated neighbour cell interference power PfiNeighbour and the own cell power PfiOwn for frequency subsets of tones fi received from neighbouring cells in said cluster;
- and
- a third processor adapted to estimate for each frequency subset of tones fi a vector of impact values kfi from at least a regression vector comprising said received values of the own cell powers PfiOwn of neighbouring cells in said cluster and from said received values of said estimated neighbour cell interference power PfiNeighbour, whereby each impact value describes the interference impact of transmissions in said first cell on a respective other cell in said cluster.
A unit connected to or integrated in a base transceiver station of a communication system, said base transceiver station serving a first cell being part of a cluster of neighbouring cells served by base transceiver stations, said unit adapted for estimating the interference impact on the other cells of said cluster when performing a resource scheduling on frequency subsets of tones fi for a user equipment (UE) transmission, said unit comprising:
- an estimator adapted to estimate the neighbour cell interference impact of a resource allocation in one of the frequency subsets of tones fi in said first cell from the sum of the reported total estimated own cell power of said neighbouring cells weighted with a pre-calculated impact value specific for the impacting cell and each corresponding impacted cell and the tentatively scheduled cell power due to said UE transmission;
- and
- a scheduler for scheduling the UE transmission to the frequency subset having a minimised interference impact on said neighbouring cells.
Dependencies are inferred from the claim text.