Method for distributing a load in a multi radio access technology heterogeneous network
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsAntonio De Domenico, Gourab Ghatak
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Abstract
A method for distributing the traffic load in a multi radio access technology heterogeneous network, the network including macrocells operating in a first sub-6 GHz band, and minicells that can operate in the sub-6 GHz band and in a millimeter band. The distribution of the traffic is carried out with an association strategy that calls upon, on the first hand, a first bias (QT) in order to favour the association with the base stations of the minicells/macrocells and a second bias (QR) in order to favour the use of the millimeter/sub-6 GHz band when the terminal is associated with a base station SBS of a minicell.
Claims13
A method for distributing traffic load in a multi radio access technology heterogeneous network, the network comprising macrocells served by first base stations of a first tier of the network, each being referred to as a MBS, operating in a first frequency band, and minicells served by second base stations of a second tier of the network, each being referred to as a SBS, configured to operate in the first frequency band and in a second frequency band, separate from the first frequency band, wherein:
- coverage parameters of the network are acquired or measured,
- using the coverage parameters of the network, an optimum pair of bias values (QTopt, QRopt) is determined that maximises a coverage probability, Pc (γ), defined as a probability that a signal to noise and interference ratio on a terminal is on average greater than a predetermined threshold (γ) in a deployment zone of the network,
- a first base station MBS is associated with the terminal, if a strongest power received from the first base station MBS in the first frequency band is greater than a strongest power received from a second base station SBS in the same frequency band, corrected by a first bias value (QTopt) of the optimum pair of bias values (QTopt, QRopt), the association then being carried out in the first frequency band, and otherwise,
- the second base station SBS of the strongest power received by the terminal in the first frequency band is associated with the terminal, the association being carried out in the first frequency band if the strongest power is greater than a power received by the terminal in the second frequency band, corrected by a second bias value (QRopt) of the optimum pair of bias values (QTopt, QRopt), and the association being carried out in the second frequency band in the opposite case.
Dependencies are inferred from the claim text.