Mediates between Application modules e.g Internet,IMS client and PDCP User plane for carrying traffic. Manages Bearers Packet filtering and IP Address configuration. Routes SMS Application to EMM,Supports AT functionality.
Handles SIM Database and interacts with application and EMM interfaces
Bearer Management,co-ordinates with application interface for IP configuration,updation of packet filtering, bearer mapping with PDCP and more...
Mobility Management,Security Management,Processing Paging Information,PLMN Selection
Acquires system information,Connection Management, Security Management, Configuration Management of PDCP, RLC, MAC, Physical layer, Performs neighbor cell measurements and cell selection/reselection, measurement reporting, Manages UE-assisted, network-controlled Mobility (Handover).
Control and User Plane Supported
For transfer of upper layer PDUs to lower layer performs sequence numbering,integrity protection,ciphering for Control plane and sequence numbering,header compression,ciphering,routing for user plane
For transfer of lower layer PDUs to upper layer performs deciphering,integrity verification for control plane and deciphering,re-ordering,header decompression, in order delivery,duplicate detection for user plane
Transparent Mode (TM),Acknowledged Mode (AM),Unacknowledged Mode (UM)supported.
For transfer of upper layer PDUs to lower layer performs Concatenation, segmentation for AM and UM and additionally re-segmentation, indication of successful delivery of upper layers PDUs for AM,updates resource requirement for transfer
For transfer of lower layer PDUs to upper layer performs duplicate detection, reordering, reassembly for AM and UM,error correction through ARQ for AM
For transfer of upper layer PDUs to lower layer performs radio resource allocation to RLC,Logical Channel prioritisation, Multiplexing, Mapping between logical channels and transport channels, Error correction through HARQ, Scheduling information reporting, Random access procedure, BSR, Radio Resource Selection and Transport Format Selection for sidelink
For transfer of lower layer PDUs to upper layer performs error correction through HARQ, De-Multiplexing, Mapping between logical channels and transport channels
Proprietary API to interact with RRC and MAC for intergration with third party components