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GSM and GPRS for Mobile Devices
(2 days or 12 hours)

Following on from the Engineering the Mobile Network course, this course focuses on the 2G radio interface and in so doing discusses in detail the physical layer, frame formats, protocols etc required to support both GSM and GPRS operation. The mechanisms which are employed as a mobile enters the network and makes and receives calls, text messages and mobile web services are also explored. Finally, the course explains the cell selection and re-selection procedures in addition to describing the various types of handovers and interworking with UMTS.

Who Should Attend

Mobile Device Engineers and Software Developers requiring a detailed understanding of GSM / GPRS from the perspective of the mobile device.

Course Outline

Divided into 6 sections, the topics covered will include:

Section 1: The Air Interface (2 hours)

  • 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.
  • Multiframes - 51 Frame and 52 Frame.
  • Burst Formats - Frequency Correction, Synchronization, Access, Normal (GMSK / 8PSK) and Dummy.

Section 2: The GSM Protocols (1.5 hours)

  • 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: GSM Operation (2.5 hours)

  • 2G Mobility Management - State Models and Location / Routing Areas.
  • 2G Initial Procedures - Cell Selection, IMSI Attach.
  • 2G Mobile Originated and Terminated Call Setup, Roaming and Billing Implications.
  • Codecs - PCM, ACELP, VSELP and MR-ACELP (AMR).
  • Text Messaging - Mobile Originated and Terminated.

Section 4: The GPRS Protocols (2 hours)

  • The GPRS Air Interface Protocols - SNDCP and LLC, RLC and MAC.
  • Error Coding - CS1 to CS4.
  • The Modified GPRS Air Interface Protocols - RLC and MAC.
  • EGPRS Operation - Modifications and Capabilities.
  • Coding Puncturing and Interleaving - MCS1 to MCS9.

Section 5: GPRS Operation (1.5 hours)

  • GPRS Timing Advance Operation.
  • GPRS Power Control.
  • Session Management and 2G / 3G PDP Context Activation.
  • Secondary PDP Contexts - Traffic Flow Templates and Filter Attributes.
  • GPRS Packet Data Transfer - Uplink and Downlink Operation, DTM.

Section 6: Mobility (2.5 hours)

  • Mobility in Idle Mode - Cell Re-selection, GSM and GPRS parameters, 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.
  • GPRS Mobility Procedures.
  • Interworking with UMTS - Handovers and Relocations.

For more information: tel +44 (0) 1344 724666 or email enquiries@mpirical.com

 
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