Multi-Carrier and Spread Spectrum Systems: From OFDM and MC ...

WiMAX 245UNIAirinterfaceSNITerminal Station, TSNTIWFRTBSTBSCIWFCoreNetwork, IPIATM, PSTN,ISDN, ..NTIWFRTBSTBase Station, BSTSNTInterworkingFunctionRadioTerminationBSTransceiverBSControllerInterworkingFunctionNetworkFigure 5-22Simplified BWA reference model for standardizationIEEE 802.16 d/eIEEE 802.16 f/g/iSAP: Service Access PointMAC: Medium Access ControllerHigher layers(IP, Ethernet, ATM, ..)MACPhysicalTransport MediumIEEE 802.16MAC LayerIEEE 802.16PHY LayerCS SAPService SpecificConvergenceSub-layer (CS)MAC SAPMAC CommonPart Sub-layer(CPS)Security Sub-layerPHY SAPPhysical Layer(PHY)Data / Control PlaneManagement EntityService SpecificConvergence Sub-layerManagement EntityMAC CommonSub-layerSecurity Sub-layerManagement EntityPHY LayerManagement PlaneNetwork Management SystemFigure 5-23IEEE 802.16 layering model and specifications5.3.4.2 Specific Convergence Sub-LayerThe specific convergence sub-layer (CS) covers the following functionalities [23]:– reception of the packet data units (PDUs) from the higher layer, i.e. from the CSservice access point (CS-SAP);