Uplink interference mitigation in heterogeneous mobile networks

Abstract

A method for controlling a heterogeneous wireless network () is proposed. The heterogeneous wireless network comprises at least one first base station () which manages communication of a plurality of first user equipments (M) positioned in at least one first cell () and at least one second base station () which manages communication of a plurality of second user equipments () positioned in at least one second cell (). Moreover, in the heterogeneous network (), for each first user equipment (M) the at least one first base station () provides a respective first allocation information set over a respective first allocation time interval. Similarly, the at least one second base station () provides for each second user equipment () a respective second allocation information set over a respective second allocation time interval. Furthermore, each first allocation information set and each second allocation information set define transmission resources for communications of each first user equipment (M) and of each second user equipment (M), respectively. In the heterogeneous wireless network (), the at least one second cell () is at least partially comprised in the first cell (). The method comprises the following steps. Said at least one first base station determines () a set of probably interfering first user equipments () with at least one of the plurality of second user equipments (). Said step of determining the set of probably interfering first user equipments () comprises the following steps. Comparing each second allocation information set with each first allocation information set having the first allocation time interval at least partially overlapped with the respective second allocation time interval, and identifying as a probably interfering first user equipment () each first user equipment () for which a correspondence is verified in said comparing allocation information sets. The method further comprises the following steps. Said at least one second base station () defines a detection time window in order to analyze univocal identifiers transmitted by probably interfering first user equipments () in said set. The method comprises identifying () a subset of effectively interfering first user equipments () with the plurality of second user equipments (). Said at least one first base station () modifies () said transmission resources for at least one first user equipment () comprised in the subset of effectively interfering first user equipments () in order to mitigate interferences.