TETRA Gateways and Repeaters

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TETRA Gateways and Repeaters

• Kenneth Hubner
• Regional Director Sepura
• kenneth.hubner_at_sepura.com

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Introduction

• What is Direct Mode?
• Types of Direct Mode Equipment
• Benefits of Direct Mode
• Gateway and Repeater Applications

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What is Direct Mode?

• Direct Mode is direct communication between two
  or more
• TETRA terminals without the use of a network
  infrastructure.

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Types of Direct Mode Equipment

• 1. DM-MS Direct Mode capable TETRA terminal

Back-to-back (standard DMO operation)
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Types of Direct Mode Equipment

• 1. DM-MS Direct Mode capable TETRA terminal
• 2. DM-REP Direct Mode Repeater

Repeater
DMO
DMO
DMO
DMO
Extends coverage between DMO terminals
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Types of Direct Mode Equipment

• 1. DM-MS Direct Mode capable TETRA terminal
• 2. DM-REP Direct Mode Repeater
• 3. DM-GATE Direct Mode Gateway

TETRA Network
TMO
DMO
TMO
DMO
Control Centre
Relays communication between DMO and TMO
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Benefits of DMO

• Allows communication when network is not
  available
• during network rollout
• outside network coverage
• during network capacity limitations
• when a network fails
• Allows communication on the boundary of network
  coverage
• Predictable operation in poor signal strenght
  areas
• Extending the network reach with the help of DMO
  Gateways
• Allows communication when no monitoring is wanted
• During covert use no monitoring from network
  might be wanted

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Gateway and Repeater applications

• Unpredictable coverage
• In building coverage
• Fallback operation
• Location of remote users
• Extending DMO coverage

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Gateway and Repeater applications

• 1. Unpredictable coverage
• When leaving a vehicle, handportable coverage may
  not be predictableOperating in built up
  areasRoaming into public buildings (shopping
  centres etc.)Operating near large metallic
  structuresOperating in a rural environment
• DMO provides some predictable guidelines to
  follow for coverage planning
• Using a Repeater will allow coverage area to be
  extended
• Using a Gateway will allow handportable operation
  in DMO,
• whilst still enabling communications with trunked
  mode users.

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Gateway and Repeater applications

• 1. Unpredictable coverage
• Police officers when operating on foot after
  leaving a vehicle
• Fire crews using the appliance as a gateway or
  repeater on the fire ground
• Ambulance Crews leaving the vehicle to attend to
  patients
• Transportation users when parked in depots use
  Gateway for
• communications to Trunked mode users

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Gateway and Repeater applications

• 2. In-building Coverage
• Large buildings such as power stations,
• storage buildings and metallic
• structured buildings may have
• no TMO coverage
• A Gateway can be used to allow
• DMO communications within the
• building, and a link to TMO users
• outside of the building

TMO
TETRA Infrastructure
Gateway
DMO
DMO User
Underground Bunker
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Gateway and Repeater applications

• 3. Fallback Operation

Mobile Coverage
Handportable Coverage
Gateway
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Gateway and Repeater applications

• 3. Fallback Operation

Mobile Coverage
Handportable Coverage
DMO User
Gateway
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Gateway and Repeater applications

• 4. Location of remote users
• Users out of coverage can report their position
  via built-in GPS receiver.
• The position report can be sent in DMO to the
  gateway which can relay it
• to TMO users or an operator.

TMO SDS
TETRA Network
PEI SDS
Gateway
Position Report
Position Report
TMO SDS
DMO SDS
Position Report

Position Report
Mobile Data Terminal
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Gateway and Repeater applications

• 5. Extending coverage
• Provide coverage between two geographically
  separated sites when there
• is no network coverage available.

Site B
Site A
DMO
DMO
Repeater
DMO User
DMO User
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Gateway and Repeater applications

• Summary
• Direct Mode is a complementary service to Trunked
  Mode operation
• Utilisation of DMO Gateways and Repeaters
  provides
• Network extension capabilities
• Predictability of coverage for working practices
• Workflow Management
• Location and management of DMO users from network
  Control Centres
• Fallback scenarios, when base station sites fail
• DMO must be classed as an essential service in
  Public Safety, Transportation and Utility
  networks

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• Any Questions?
• kenneth.hubner_at_sepura.com