TETRA Gateway and Repeater Applications for Voice and Data

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TETRA Gateway and Repeater Applications for Voice
and Data

• Steve Barber
• Market Development Manager
• Sepura Limited

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Introduction

• What is Direct Mode?
• Types of Direct Mode Equipment DM-REP
• Types of Direct Mode Equipment DM-GATE
• Typical applications of DMO Services?

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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

• DM-MS Direct Mode capable TETRA Terminal

• Back-to-back (standard DMO operation)

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Types of Direct Mode equipment

• DM-REP Direct Mode Repeater

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

• DM-GATE Direct Mode Gateway

Gateway
TETRA Network

Control Centre
Relays communication between DMO and TMO
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Infrastructure Limitations for Gateways

• To support individual call types DM-GATE must
  register DM-Gate users with the SwMI
• No network infrastructure supports this
  registration operation
• Hence SwMI sees DM-GATE as just another
  terminal on the system
• Cannot address individual calls (voice or SDS)
  to the intended user

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Benefits of DMO

• Operation outside of the coverage of a TETRA
  Infrastructure
• Predictable operation in poor signal strength
  areas
• Covert use, no monitoring from the network can
  take place
• Communications when there are capacity
  limitations on a network
• Communication when a network fails
• DMO Gateway extends the operational reach of a
  network
• DMO economic solution to coverage at edge of
  network or rural areas
• Enhanced coverage during network roll-out

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Applications of Gateways and Repeaters

• Unpredictable Coverage
• When users leave a vehicle, handportable coverage
  may not be predictable
• Operating in built up areas
• Roaming into public buildings (shopping centres
  etc.)
• Operating near large metallic structures
• Operating in a rural environment
• Switching into 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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Applications of Gateways and Repeaters

• Using DMO in this way can be useful for
• 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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Applications of Gateways and Repeaters

• Workflow Management

• Data messaging (SDS) can be received by a gateway
  and forwarded on to DMO users
• Mobile Data terminals can also be kept informed
  of data transactions

TETRA Network
TMO SDS
Gateway
PEI SDS
Mobile Data Terminal

DMO SDS
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Applications of Gateways and Repeaters

• Mobile data terminals can be used to Page
  Direct mode users, depending upon the
  circumstances it detects
• Receipt of message from TMO
• Vehicle battery flat warning
• Return to Vehicle

TETRA Network
Gateway
PEI SDS
No Network Coverage
DMO SDS
Mobile Data Terminal
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Applications of Gateways and Repeaters

• Location of Remote Users Manage Resource in DMO

• Users out of coverage of the network can report
  their current position to either their vehicle or
  to an operator via TMO and to their vehicle
• Alarm indications can report the position of the
  originator

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

Position Report
Mobile Data Terminal
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Applications of Gateways and Repeaters

• 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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Applications of Gateways and Repeaters

• Fallback operation

DMO User
Gateway
Mobile Coverage
Handportable Coverage
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Applications of Gateways and Repeaters

• 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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Summary

• Direct Mode provides 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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Kamsa hamnidaAny Questions?