slots the amount of base to base interference produced would hamper or make any communications unsustainable for these slots the present invention may however be most advantageously applied to situations which fall between these two extremes where a limited number of crossed slots would be allowable by employing novel radio resource management rrm techniques the wireless transmit receive units wtrus which are close to their serving node b are preferentially assigned to the crossed slots thus minimizing the probability of mobile to mobile interference the maximum number of crossed slots which can be tolerated is a function of many factors including but not limited to the geography of the users surrounding the node b the mobility of wtrus and rrm performance the maximum number of crossed slots between two cells c1 and c2 is represented by x c1 c2 the present invention assumes that the maximum number of crossed slots between any pair of cells is known in practice an operator would decide an appropriate value for x c1 c2 by considering the extent to which the cells c1 and c2 are isolated this invention will also explain a possible systematic method to determine the x c1 c2 the actual cost of a slot assignment fc for a cell may be defined according to the amount of offered traffic that cannot be served because.