Media Access Control (MAC)

Services

• Data Transfer
  - Unacknowledged, no data segmentation
• Reallocation of radio resources
  - On request of RRC, change of MAC parameters
• Reporting of measurements
  - Traffic volume, quality indication to RRC

Functions

• Mapping between logical channels and transport channels
• Selection of appropriate Transport Format for each Transport Channel depending on instantaneous source rate
• Priority handling between data flows of one UE
• Priority handling between UEs by means of dynamic scheduling
• Priority handling between data flows of several users on the DSCH and FACH
• Identification of UEs on common transport channels
• Multiplexing/demultiplexing of higher layer PDUs into/from transport blocks delivered to/from the physical layer on common transport channels
• Traffic volume monitoring
• Dynamic Transport Channel type switching
• Ciphering for transparent RLC
• Access Service Class selection for RACH transmission