Scheduling method in a cellular system, and computer program product and scheduling device for this method

摘要

The present invention relates to a method of scheduling. in the context of Multiuser MIMO techniques, in a cellular system comprising a plurality of antenna means transmitting a plurality of spatial streams for serving a plurality of users having respective capacities. The method comprises: - calculating an approximated scheduling metric for each possible combination of users among said plurality of users, and associated spatial streams among said plurality of spatial streams, the approximated scheduling metric being a function of user capacities without taking into account interference; - sorting the approximated scheduling metrics in descending order so as to obtain a classification of said possible combinations and calculating a local scheduling metric for the first combination in said classification, the local scheduling metric being a function of real user capacities taking into account interference, and calculated from the MIMO precoder; - then, for each following combination in the classification, comparing the approximated metric of the following combination to a preceding calculated local scheduling metric, and if the approximated metric of the following combination is higher than the preceding calculated local scheduling metric, then the local scheduling metric of said following combination is calculated and then replaces said preceding calculated local scheduling metric ; if the approximated metric of the following combination is lower than or equal to said preceding calculated local scheduling metric, defining the combination providing the highest calculated local scheduling metric as the best combination of users and associated spatial streams. The method is carried out for each of the radio resources on which a MU-MIMO transmission or reception may take place.