A base station device dynamically adjusts the configuration of a special slot when operating in a time division duplexing (TDD) mode. The base station can initially communicate with a user equipment (UE) using a first frequency in a time division duplexing (TDD) mode. Using, for example, a timing advance procedure, the base station can determine when the UE requires an expanded cell range (e.g., if the UE is at the cell range edge). In response, the base station adjusts a configuration of a special slot for the UE. The adjustment to the special slot can comprise an addition of a gap symbol, a prioritizing of uplink transmissions over downlink transmissions, or a reserving of one or more downlink symbols during scheduling.