GSM Advanced Signalling

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GSM Advanced Signalling

ELP 0406  ★★★★

The course focuses on functional aspects of the most important GSM network nodes and the signalling exchanged among them. The GSM signalling model is introduced and explained step by step, following the main interfaces on the so-called “connection path” (Um, A-bis, A). The various signalling protocols are discussed, with stress on the specific traffic cases (location updating, call connection, handover).

The course is based on the GSM Technical Specifications and hence is vendor-independent.

Target audience – Who should attend and benefit

The course is addressed to network engineers, network planning and tuning personnel, as well as any technical stuff requiring deeper knowledge of the system signalling.

Prerequisites – What you are supposed to know prior to the course

An understanding of the principles of the GSM systems and basic knowledge on architecture of cellular network is essential.

Course content – What you will learn

  • GSM architecture overview
    • Nodes
    • Interfaces
    • Traffic and Signalling
    • Protocols
  • Network identity numbers
    • Mobile Station International ISDN Number (MSISDN)
    • International Mobile Subscriber Identity (IMSI)
    • Temporary Mobile Subscriber Identity (TMSI)
    • International Mobile Equipment Identity (IMEI)
    • Location Area Identity (LAI)
    • Cell Global Identity (CGI)
    • Base Station Identity Code (BSIC)
    • Mobile Station Roaming Number (MSRN)
  • Air interface characteristics
    • Frequency bands
    • Physical channels
    • Cell allocation
    • GSM logical channels
    • Frame structure
    • Burst formats
    • GSM channel combinations
    • Mapping of logical channels onto physical channels
  • Traffic cases
    • Location updating
    • Calls
    • Handovers
  • System Information
    • Idle mode System Information
    • Active mode System Information
  • Signaling on the MS-BTS (Um) interface
    • General description
    • Layer 3 protocols
    • Layer 3 message format
    • Network signalling vs. user signalling (SMS)
    • LAPDm signalling (Layer 2)
    • Layer 1 functions
  • Signalling on the BTS-BSC (A-bis) interface
    • Traffic
    • Transcoding and rate adaptation
    • DTX functions and in-band signalling
    • TRX signalling
    • Layer 1
    • Layer 2 (LAPD)
    • Layer 3
  • Signalling in SS7
    • Signalling methods
    • Signalling System No. 7
    • Signalling network
    • MTP signalling
    • SCCP signalling
  • Signalling on the BSC-MSC (A) interface
    • BSSAP signalling
    • Direct Transfer Application Part (DTAP)
    • BSS Management Application Part (BSSMAP)
    • Initial MS messages
    • MS Classmark information
    • Message format on the A interface
  • Switching System signalling
    • Mobile Application Part (MAP)
    • Transaction Capability Application Part (TCAP)
    • ISDN User Part (ISUP)
  • Signalling procedures between MS and MSC
    • Mobile terminating call
    • Call disconnection and release of resources
    • Location updating
    • Signalling diagrams
  • GPRS signalling overview
    • System architecture
    • Aire interface
    • System information
    • Mobility Management functionality

Duration – How long it takes

4 days (equivalent to 24 hours of lecture) for the Base Station System part plus 1 day (equivalent to 6 hours of lecture) for the Switching System part.