From scheduling point of view, is it possible to use grant-free transmission/access in the 5G system or link level simulator? If no, is it possible to define new type of scheduler in your simulator?
unfortunately, the Vienna 5G Simulators were never designed to simulate grant-free access. The Vienna 5G LLS inherits a fixed type of frame structure and supports a fixed scheduler. Therefore, the schedule for all base stations and users is a input parameter to the simulation that cannot be changed from frame to frame.