The present disclosure relates to embodiments of a node entity and method for scheduling user data packets on a common channel of a base station node. The common channel being shared by a number of mobile telecommunications operators, OPi, i=1, 2, 3, . . . . The scheduling of the user data packets is performed in consecutive Transmission Time Intervals, TTIs, and in dependence of which operator OPi serving different user packets. During a TTI, the data packets are transmitted according to scheduling determined in the adjacent previous TTI. During the TTI, a scheduler controller calculates and determines the prioritized OPi for the next TTI, said calculation being performed by calculation based on the share of TTIs with competition per operator within a sliding window and a list keeping information based on a predetermined number of previous, consecutive TTIs within the sliding window.