Signaling and Protocol Analysis in GSM |
Course Duration: 2 days (appr. 16 hours)
Content Description: |
First Day
|
The Basics
- Introduction to GSM / The Cellular Network Approach / Architecture of BSS and NSS /
The GSM Family
- The GSM Air-Interface
/ Logical Channels ó Physical
Channels / Frame Structure
- The GSM Terrestrial Interfaces
/ Abis-, A- / Ater-, B-, C-, D-, E-, F-, G-Interfaces
- The OSI Reference Model
/ General Concept / The 7 Layers / Protocol Stacks /
Primitives / Peer-to-Peer Communication / Embedding / HDLC
- Outband ó Inband Signaling / The Concept of
Dedicated Signaling Links
|
2 hours |
The Abis-Interface
- The Protocol Stack on the Abis-Interface
- Layer 2 è The LAPD-Protocol / Frame Structure /
Adaptations from ISDN / Parameters / Q.930 + Q.931
- Layer 3 è GSM 08.58 / GSM 08.59 /
OML ó RSL ó TCH / transparent vs.
Non-transparent / Signaling on the RSL
- TRAU-Frame
/ Inband Signaling
- Typical Error Indications / Error Messages
|
2.5
hours |
The SS7-Protocol Stack
- MTP 1 - 3 / FISU / LSSU / MSU / Message Structure and Format / Addressing (OPC +
DPC) Automatic Network Management / Error Recognition and Correction
- SCCP
/ Message Structure and Format / connection-oriented ó connection-less / SLR + DLR / Global Title
- TCAP + MAP
/ Message Structure and Format / GSM Specifics / ASN.1 / PDU
communication
- The ITU-T Specifications (Q.700 Q.704 / Q.711 Q.714 / Q.771
Q.773) / Where can I find
? / How to
?
|
3.5
hours |
Second Day
|
The Air-Interface
- The Protocol Stack on the Air-Interface
- Layer 2 è The LAPDm-Protocol / Message
Formats / LAPD ó LAPDm / A, B and Bbis-Format /
Channel Types (e.g. SACCH / FACCH)
- Layer 3 è GSM 04.08
/ PD / TI / SI / SSN / Message
Formats / Messages for RR, MM and CC / Manual Decoding Exercises (Sample Messages and
Parameters)
- Typical Error Indications / Error Messages
|
2.5 hours |
The A-Interface
- The Protocol Stack on the A-Interface
- BSSMAP and DTAP / Message Structure and Format
- Layer 3 è GSM 08.08 / Is it Layer 3 or 4 ? / Message
Formats / Manual Decoding Exercises (Sample Messages and Parameters)
- Typical Error Indications / Error Messages
|
2 hours |
Selected Scenarios (Theory)
- The Mobile Terminating Call Scenario (within the BSS / within the NSS)
- The Inter-MSC-Handover Scenario (within the BSS / within the NSS)
|
1 hour |
Selected Scenarios (Real Life Traces)
|
2 hours |
Comprehension Test
|
0.5
hours |