GSM and GPRS Air Interface
- Duration: 2 days or 12 hours
- Level: Level 3
GSM and GPRS Air Interface
Course Outline
Divided into 10 sections, the topics covered will include:
Section 1: Introducing the GSM Air Interface (1 hour)
- Frequency Allocations around the World - GSM, E-GSM, GSM-R.
- Frequency Reuse and Cell Planning Issues.
- Modulation Techniques - GMSK and 8PSK.
- TDMA - Frames, Multiframes and Superframes.
- Burst Formats - Frequency Correction, Synchronization, Access, Normal (GMSK / 8PSK) and Dummy.
Section 2: The Air Interface Protocols (1 hour)
- Air Interface Signalling - Dedicated and Common Channel.
- Layer 2 Protocols - LAPDm, Type A, B, Bbis and C.
- Link Layer Procedures - Frame Formats, SAPIs and SMS support.
- Layer 3 Protocols - RR and DTAP.
- RR and DTAP - Operation and Messages.
- Analysis of real network traces using Mpirical’s drive test tool.
Section 3: The Mobile Station (1 hour)
- Multimode Handsets and Service Support.
- Handset Capabilities - Radio Access, Power Class, Multislot Class and HSCSD.
- Codecs - ACELP, VSELP and M-ACELP (AMR).
- Coding and Interleaving.
Section 4: Network Entry Procedures (1 hour)
- Power On - Frequency and Time Synchronization.
- GSM System Information Message Analysis.
- Cell Selection - C1 Parameters.
- IMSI Attach.
Section 5: Dedicated Mode Procedures (1 hour)
- Mobile Originated and Terminated Call Setup - detailed analysis of signalling over the air interface.
- Measurement Reports, Power Control and Timing Advance.
- Channel Optimization - Frequency Hopping and DTX
- Supplementary Services - Procedures for Call Related and Call Independent.
- SMS Transfer and SMS Protocols - SM-CP, SM-RP and SM-TP.
Section 6: Mobility (1 hour)
- Mobility in Idle Mode - Cell Re-selection, C2 parameters and Location Updates.
- Mobility in Dedicated Mode - Handovers, Handover Triggers and Thresholds.
- Handover Types - Non-synchronized, Pseudo-synchronized, Finely-synchronized and Pre-synchronized.
- GSM Handover Procedures.
- Interworking with UMTS - Handovers and Relocations.
Section 7: GPRS Logical and Physical Channels (1.5 hours)
- TDMA Operation and Radio, Physical and Logical Channels.
- Burst Structures, Modulation, Coding and Interleaving.
- Multiframes - 51 Frame and 52 Frame.
- GPRS Timing Advance Operation.
Section 8: GPRS Signalling Procedures and Protocols (1.5 hours)
- The GPRS Air Interface Protocols Part 1 - SNDCP and LLC.
- GPRS Signalling Procedures - GPRS Attach.
- Security Procedures.
- Dealing with QoS - Reliability, Delay, Throughput and Precedence
Section 9: GPRS Resource Allocation and Operation (1.5 hours)
- The GPRS Air Interface Protocols Part 2 - RLC and MAC.
- Uplink and Downlink Resource Allocation - Dynamic, Extended and Exclusive.
- Uplink and Downlink Packet Data Transfer - TBF and Packet Ack / Nack.
- Error Coding - CS1 to CS4.
Section 10: EGPRS Resource Allocation and Operation (1.5 hours)
- EDGE - Introducing 8PSK Modulation.
- The Modified GPRS Air Interface Protocols - RLC and MAC.
- EGPRS Operation - Modifications and Capabilities.
- Coding Puncturing and Interleaving - MCS1 to MCS9.
Who Should Attend
This course is designed for network engineers and radio planners requiring a detailed understanding of the GSM GPRS air interface or technical managers involved in the development and operation of the GSM GPRS radio network.