US Patent 11102663 Radio access networks

Among other things, a communication system comprising at least one remote unit and at least one controller is described. The at least one remote unit exchanges radio frequency (RF) signals with mobile devices. Each RF signal comprises information destined for, or originating from, one of the mobile devices. The controller is communicatively coupled to the at least one remote unit and comprises a real-time scheduler for assigning airlink resources to the mobile devices for the information. The at least one controller and the at least one remote unit are configured so that the physical layer functions for an air interface are split between the controller and the at least one remote unit. The at least one controller and the at least one remote unit are configured so that the split of the physical layer functions for at least some of a first channel of the air interface differs from the split of the physical layer functions for a second channel of the air interface.