Methods and apparatus for a user equipment (UE) of a communication system involve receiving a signal transmitted by a base station of the communication system; determining, based on the received signal, a timing advance, and a transport block size for a signal to be transmitted by the UE; and adjusting, based on the determined timing advance and the transport block size, at least one of the start of processing information for the signal to be transmitted by the UE and a size of a memory for storing processed information for the signal to be transmitted.