gsm協(xié)議棧原理ppt課件-閱讀頁(yè)
2025-05-20 12:35本頁(yè)面
【正文】 urce file of CC Mcd_parser Generated header file Headers of mon local structure Headers of structures for primitives Headers of mon used enums ASNs of mon used and SS ACT Files Introduction: Directory Structure Layer 4 ? The interface between PS and MMI/AT L4 L4C (1/9) ? L4C ? Layer 4 controller ? Coordinate all L4 modules to perform the requests from AT or MMI ? Interfaces ? There are interfaces between all modules in L4 ? PPP_L4C_SAP PPP ? L4C_ABM_SAP ABM ? Source ? mcu/ps/l4/l4c L4 L4A amp。 SIM ? Transmitting and receiving SMS ? Cell Broadcast management ? Interfaces ? SMSAL_L4C_SAP – L4C ? SMSAL_SOC_SAP – SOC ? MNSMS_SAP – SMS ? SMSAL_AS_SAP RMPC ? Source ? mcu/ps/l4/smsal L4 – TCM/SMSAL in WAP/GPRS (6/9) ? TCM will relay IP packets to SNDCP, and vice versa. ? SMSAL forwards PUSH message to Socket T C MWAPTCP /IP/ UDPSOCL4CSNDCPABMLLCSMS MS A LSMSL4 – CSM (7/9) ? Call Service Management ? Bearer Capability Handling ? CODEC attachment management ? CSD/Fax activation/deactivation ? Call information maintaining ? Call related SS handling ? Interfaces ? CSM_L4C_SAP – L4C ? MNCC_SAP – CC ? CSM_TDT_SAP – TDT of Data ? CSM_L2R_SAP – L2R of Data ? MNSS_SAP CISS ? Source ? mcu/ps/l4/csm L4 – SMU (8/9) ? Security Management Unit ? Security Checking ? Phone lock ? CHV1/CHV2 ? Personalization (ETSI ) ? Autolock ? Interfaces ? SMU_L4C_SAP – L4C ? PS_SIM_SAP SIM ? Source ? mcu/ps/l4/smu L4 PHB amp。 PHB MO Call 2 MO call 3 TCH Assigned MO call 4 Attach User Speech GPRS Attach ? Condition ? MS is idle in a cell that supports GPRS ? MS is requested for GPRS Attach by AT mand ? Players ? L4C, RAC, MM, LLC, RR GPRS Attach – 1 Read SI13/PSI1 GPRS Attach 2 PDP Context Activation ? Condition ? GPRS Attached ? PDP Context activation is triggered by dialup from PC ? Players ? L4C, TCM, PPP, SM ? LLC, MM, RR PDP Context Activation – 1 Atd*99 (UART) LCP/PAP/IPCP PDP Context Activation – 2 (UART) IPCP ACK PDP Context Activation – 3 Read PPP frame from UART Write PPP frame from UART Uplink TBF Operation ? Condition ? Idle state, GPRS service is available ? One uplink LLPDU ? Onephase access ? Players ? RLC, MAC, RMC, MPAL, REASM ? LLC, L1 UL TBF – 1 UL TBF – 2 UL TBF – 3 ? Condition – Idle state. GPRS service is available. – One downlink LLPDU ? Players – RLC, MAC, RMC, MPAL, REASM, – LLC, L1 Downlink TBF Operation DL TBF – 1 DL TBF – 2 Q a
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