Transport Channel type switching: performed based on decision taken by RRC. This is related to a change of radio resources.
If requested by RRC, MAC shall switch the mapping of one
designated logical channel between common and dedicated transport
channels.
C/T MUX: The C/T MUX is used when multiplexing of several dedicated logical channels onto one transport channel is used. An unambiguous identification of the logical channel is included.
Ciphering: Ciphering for transparent mode data to be ciphered is performed in MAC-d.
Deciphering: Deciphering for ciphered transparent mode data is performed in MAC-d.
UL TFC selection: Transport format and transport format combination selection according to the transport format combination set (or transport format combination subset) configured by RRC is performed.
DL Scheduling/Priority handling: in the downlink, scheduling and priority handling of transport channels is performed within the allowed transport format combinations of the TFCS assigned by the RRC.
Flow Control: a flow control function exists toward MAC-c/sh to limit buffering between MAC-d and MAC-c/sh entities. This function is intended to limit layer 2 signalling latency and reduce discarded and retransmitted data as a result of FACH or DSCH congestion.
