Methods, devices, and computer program products concerning accommodating ultra-reliable low latency communications (URLLC) traffic by making a determination of which mobile broadband (MBB) user equipment (UE) to puncture, where in response to an indication that URLLC traffic needs to be scheduled in the midst of ongoing MBB transmissions in a wireless communications network, the determination is made from a plurality of MBB UEs with the ongoing MBB transmissions, of a set of the plurality scheduled for transmission in a slot required by the URLLC traffic. From that set of MBB UEs, a subset of MBB UEs for puncturing is chosen, where that choice is made at least in relation to accommodating a reliability constraint of the URLLC traffic, maximizing a sum proportional fairness metric of the plurality of MBB UEs, and minimizing a block error rate in a computation of a proportional fairness metric for each UE of the subset.