Prerequisites

  • Familiarity with the principles and techniques of designing a mobile radio system, or previous attendance on the Radio System Engineering course (RP1101).

Who Should Attend?

  • Engineers working or involved in radio system design who require a detailed understanding of the planning, optimisation and configuration aspects of TETRA systems.

Outline

  • Section 1 Introduction
  • Section 2 Channel Structure and Configuration
  • Section 3 Burst structure and Configuration
  • Section 4 Radio Performance
  • Section 5 UHF and VHF Propagation Principles
  • Section 6 Frequency Reuse and Planning Techniques
  • Section 7 Propagation Models and Link Budgets
  • Section 8 Cell Dimensioning and Positioning
  • Section 9 Capacity Planning
  • Section 10 Radio Procedures
  • Section 11 Security Aspects
  • Appendix A The Decibel

Section 1 INTRODUCTION

  • The following topics are covered in this section:
  • TETRA
  • Calculation of Carrier Frequencies
  • TETRA Air Interface Protocol Stack
  • TETRA Release 1 and Release 2
  • Channel Adaptation
  • Network Areas

Section 2 CHANNEL STRUCTURE AND CONFIGURATION

  • The following topics are covered in this section:
  • Time Division Multiplexing (TDM)
  • Physical Channels
  • Time Division Multiple Access (TDMA) Structure
  • Logical Channels
  • TETRA CCHs
  • Normal Control Mode
  • Extended Control Mode and Minimum Control Mode
  • MCCH Sharing
  • Carrier Sharing
  • Logical Channels and Packet Data
  • QAM Logical Channels
  • Traffic Physical (TP) Channels
  • Control Physical (CP) Channel
  • Unallocated Physical Channel
  • Frame 18 for CP Channel and TP Channel
  • Summary of Mapping
  • QAM Control Physical (CP) Channel
  • Summary of Mapping for QAM Channels
  • General Structure of a TEDS Cell

Section 3 BURST STRUCTURE AND CONFIGURATION

  • The following topics are covered in this section:
  • Uplink Burst Structure
  • Downlink (DL) Bursts
  • QAM Burst Types
  • Random Access QAM Bursts
  • Example Control Uplink QAM Bursts
  • Example Normal Uplink QAM Bursts
  • Example Normal Downlink QAM Bursts
  • Example Linearization Downlink QAM Bursts

Section 4 RADIO PERFORMANCE

  • The following topics are covered in this section:
  • TETRA Transmit Power levels
  • QAM Transmit Power Levels
  • TETRA Receiver Classes
  • Reference Sensitivity and Performance - TETRA Release 1 BS
  • Reference Sensitivity and Performance - TETRA Release 1 MS
  • Reference Sensitivity - TETRA Release 2 - MS and BS
  • Receiver Performance - TETRA Release 2 QAM Channels - MS and BS
  • Reference Interference Ratios - Co-Channel and Adjacent Channel
  • Receiver Performance at Reference Interference Ratios - BS π/4-D4PSK and π/8-D8PSK
  • Receiver Performance at Reference Interference Ratios - MS π/4-D4PSK and π/8-D8PSK
  • Static Reference Sensitivity and Adjacent Channel Interference Performance for QAM
  • Co-Channel Interference Performance - QAM Channels

Section 5 UHF AND VHF PROPAGATION PRINCIPLES

  • The following topics are covered in this section:
  • Propagation Characteristics
  • The Troposphere
  • Refractivity (n)
  • Super-Refraction and Ducting
  • Potential Maximum Range for UHF Links
  • Range Between Two Antennas
  • Isotropic Radiator
  • Free Space Path Loss
  • Exercise 1
  • Effects of Clutter in the Radio Path
  • First Fresnel Zone (F1)
  • Knife-Edge Diffraction
  • Multiple Obstructions
  • Slow Fading
  • Fast Fading
  • Time Dispersion and Inter-Symbol Interference
  • TETRA Channel Models

Section 6 FREQUENCY REUSE AND PLANNING TECHNIQUES

  • The following topics are covered in this section:
  • Introduction to Frequency Planning
  • Carrier to Interference (C/I) Ratio
  • Carrier to Adjacent Channel (C/A) Ratio
  • Frequency Reuse
  • Cluster Size
  • Cell Sectorization and Cell Splitting
  • Base Station Colour Code and Scrambling Code
  • Equalization

Section 7 PROPAGATION MODELS AND LINK BUDGETS

  • The following topics are covered in this section:
  • Propagation Prediction and Modelling
  • Okumura's Field Measurements
  • The Okumura-Hata Models
  • COST (Collaborative Studies in Science and Technology) 231
  • COST 231 Walfish-Ikegami Model
  • COST 231 Microcell Model
  • Coverage Prediction by Software Tool
  • ETSI Guidelines
  • ETSI Examples
  • Slow Fading - ETSI values
  • Body Loss
  • Example Downlink Power Budget
  • Shadow Fade Margin and Coverage Probability
  • Fade Margin Exercises
  • Coverage Probability - ETSI guidelines
  • DL and UL Budgets
  • System (Cell) Balance
  • Analysis of Cell Balance

Section 8 CELL DIMENSIONING AND POSITIONING

  • The following topics are covered in this section:
  • Cell Dimensions
  • Antenna Height and Height Gain
  • Cell Repeaters
  • Propagation Delay and Antenna isolation
  • Frequency Translating Repeaters
  • Cell Positioning
  • Cell and Location Area Borders
  • In-Building Coverage

Section 9 CAPACITY PLANNING

  • The following topics are covered in this section:
  • The Erlang
  • Offered, Carried and Blocked Traffic
  • Erlang's Traffic Models
  • Packet Switched Service Characteristics
  • Packet Data Modelling
  • CCH (Control Channel) Dimensioning
  • Traffic Loading on the CCH
  • Allocating CCH to a Cell

Section 10 RADIO PROCEDURES

  • The following topics are covered in this section:
  • Radio Procedures
  • The MLE/MAC Relationship
  • Signal Strength Measurements
  • Initial Cell Selection at Power Up
  • Procedure at Power Up
  • Cell Reselection
  • The C1 and C2 Calculation
  • Using C1 and C2
  • C1/C2 Modifications for QAM Channels
  • Assigned channel types and classes
  • Non-conforming Concentric Channels
  • Sectored Channels
  • Sectored Cells
  • Radio Improvable State
  • Radio Relinquishable State
  • Radio Useable State
  • Cell Reselection Procedure
  • Reselection Types
  • Cell Reselection Type
  • Random Access
  • Random Access
  • QAM Random Access Subslots
  • Mobile Adaptive Power Control
  • Mobile Closed Loop Power Control
  • Principles of Link Adaptation
  • Support for Extended Range
  • Air-Ground-Air Service Concept

Section 11 SECURITY ASPECTS

  • The following topics are covered in this section:
  • Security Classes
  • Authentication and Ciphering
  • Authentication Key (K)
  • MS Authentication
  • Network and Mutual Authentication
  • Encryption
  • Group Encryption
  • Distribution of GCK to the MS
  • Distribution of CCK
  • Distribution of SCK

Appendix THE DECIBEL

  • The following topics are covered in this section:
  • Base, Index and Power
  • Multiplication Laws of Indices
  • Division
  • Logarithms
  • The Decibel
  • Power Levels
  • System Calculations
  • Example System Calculation
  • Exercise

2 Days

Duration

This is a QA approved partner course

Delivery Method

Delivery method

Classroom

Face-to-face learning in the comfort of our quality nationwide centres, with free refreshments and Wi-Fi.

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