Course benefits
This advanced course provide a focussed and in-depth coverage of the GSM air interface, procedures and functions.
Who should attend?
Engineers, technicians and other technical professionals involved with GSM mobile equipment or base stations, who require an in-depth understanding of the GSM air interface.
Pre-requisites
Delegates should have attended course 623: GSM System Overview, or have equivalent knowledge prior to attending this course.
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Course 626: Content
Air Interface Channel Characteristics
Frequency Spectrum
FDMA working
GSM TDMA details
Burst Characteristics
- Frequency Correction
- Synchronisation
- Random Access
- Normal Burst
- Dummy Burst
Channel Types
- Logical Channels
- Control
- Traffic
- Physical Channels
- Multi-Frame Structures
Channel Mapping
Signalling Structures
Air Interface Protocol Structure
Layer 2 Structures and Procedures
- LAPD
- LAPDm
Layer 1
- SACCH Format
- SACCH Transmission
BSSAP functionality
- BSSMAP
- DTAP
Radio Resource
Call Control
Mobility Management
Procedures and Messages
GSM Modes
System Information
Cell Selection and Re-Selection
Location Updates
Control Channel Structures and Usage
- Paging
- Access Grant
- SDCCH
Dedicated Mode Procedures
- General
- Measurements
- Power Control
- SAACH
Power Classes
Timing Advance
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Messages
- Paging
- Assignment
- Service Request
- Attach / Detach
- Authentication
- Ciphering
Handover Procedures
Measurement Reports
Handover Types
- Power Budget
- Interference
Synchronisation
Air Interface Sequences
Location Update
MO Call
MT Call
VGCS
Advanced Procedures and Considerations
Cell Splitting
Vertical Frequency re-use
Propagation Models
Common Propagation Models
DTX and DRX
Frequency Hopping
Cell Planning Issues
- General Considerations
- Reduction of Delay spread
- Concentric Cells
- Street Canyons
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