A hidden node interference reduction method of an access point (100, 200) of a wireless communication network employing Carrier Sense Multiple Access - CSMA, wherein the access point is adapted to serve a plurality of mobile terminals (101, 102, 103, 104, 105, 201, 202, 203, 204), the method comprising: receiving a signal from at least two of the plurality of mobile terminals, wherein each signal is indicative of a position of the respective mobile terminal; partitioning the plurality of mobile terminals into one or more groups (110, 120, 210, 220) by: determining a metric for at least one pair of mobile terminals based on the indicated positions, wherein the pair of mobile terminals comprises a first mobile terminal and a second mobile terminal, and wherein the metric is associated with a distance between the first mobile terminal and the second mobile terminal of the pair of mobile terminals; and letting the first and second mobile terminals of the pair of mobile terminals belong to different groups if the metric fulfills a condition, wherein the condition is indicative of the first mobile terminal causing hidden node interference to the second mobile terminal; and allocating a separate respective frequency resource to each group of mobile terminals, wherein partitioning the plurality of mobile terminals into one or more groups comprises minimizing a maximum distance between any pair of mobile terminals belonging to the same group, wherein the access point applies beam forming and wherein the metric is determined based on a received signal strength of the position indicative signals from the first and second mobile terminals and on beam forming parameters of the first and second mobile terminals. receiving a signal from at least two of the plurality of mobile terminals, wherein each signal is indicative of a position of the respective mobile terminal; partitioning the plurality of mobile terminals into one or more groups (110, 120, 210, 220) by: determining a metric for at least one pair of mobile terminals based on the indicated positions, wherein the pair of mobile terminals comprises a first mobile terminal and a second mobile terminal, and wherein the metric is associated with a distance between the first mobile terminal and the second mobile terminal of the pair of mobile terminals; and letting the first and second mobile terminals of the pair of mobile terminals belong to different groups if the metric fulfills a condition, wherein the condition is indicative of the first mobile terminal causing hidden node interference to the second mobile terminal; and determining a metric for at least one pair of mobile terminals based on the indicated positions, wherein the pair of mobile terminals comprises a first mobile terminal and a second mobile terminal, and wherein the metric is associated with a distance between the first mobile terminal and the second mobile terminal of the pair of mobile terminals; and letting the first and second mobile terminals of the pair of mobile terminals belong to different groups if the metric fulfills a condition, wherein the condition is indicative of the first mobile terminal causing hidden node interference to the second mobile terminal; and allocating a separate respective frequency resource to each group of mobile terminals, wherein partitioning the plurality of mobile terminals into one or more groups comprises minimizing a maximum distance between any pair of mobile terminals belonging to the same group, wherein the access point applies beam forming and wherein the metric is determined based on a received signal strength of the position indicative signals from the first and second mobile terminals and on beam forming parameters of the first and second mobile terminals.