GSM - Signaling & Protocol Analysis
(RAN & Mobile Station)

The OSI Reference Model

Course Description

MTP 1 – 3
FISU / LSSU / MSU / Message Structure and Format / Addressing (OCP + DCP) / FSN & BSN / Automatic Network Management / Link Establishment (SLTM / SLTA) / Error Recognition and Correction
SCCP
Message Structure and Format / Connection-oriented ? Connection-less / SLR + DLR / End-to-End Routing ? Global Title / Virtual Connections
The ITU-T Specifications (Q.700 – Q.704 / Q.711 – Q.714 / Q.771 – Q.773)
Where can I find …? / How to …?

The Data Processing Chain
Transcoding => Channel Coding => Interleaving => Ciphering => Burst Generation => Modulation / DTX and DRX
Network Architecture in GSM
HLR / VLR / EIR / MSC / BSC / BTS / TRAU
Overview of the GSM Protocol Stack
Call Control (CC) / Mobility Management (MM) / Radio Resource Management (RR) / Link Access Protocol for the D-Channel, modified (LAPDm) / LAPD / GSM 08.58 / (Message Transfer Part) MTP 1, 2, 3 / Signaling Connection Control Part (SCCP), TCAP and MAP (Transfer Capabilities Application Part and Mobile Application Part)

Logical and Physical Channels (BCCH, SDCCH, TCH, SACH, FACCH, …)
Frame Hierarchy / 26-Multiframe / 51-Multiframe
Layer 2 => The LAPDm-Protocol
Message Formats / LAPD => LAPDm / A, B and Bbis-Format
Layer 3 => GSM 04.08
PD / TI / SSN / Message Formats / Messages for RR, MM and CC / Hex- => Dec. Conversions

Channel Configuration
The Protocol Stack on the A-Interface
BSSAP, BSSMAP and DTAP
Message Structure and Format
Layer 3 => GSM 08.08
Message Formats / Manual Decoding Exercises (Sample Messages and Parameters)
Failure Analysis and Information Interpretation

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