Transcript TETRA Gateway and Repeater Applications for Voice and Data

TETRA Gateway and Repeater
Applications for Voice and Data
Steve Barber
Market Development Manager
Sepura Limited
Introduction
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What is Direct Mode?
Types of Direct Mode Equipment DM-REP
Types of Direct Mode Equipment DM-GATE
Typical applications of DMO Services?
What is Direct Mode ?
• Direct Mode is direct communication between
two or more TETRA terminals without the use of
a network infrastructure.
Types of Direct Mode equipment
• DM-MS
Terminal
Direct Mode capable TETRA
Back-to-back (standard DMO operation)
Types of Direct Mode equipment
• DM-REP
Direct Mode Repeater
Repeater
DMO
DMO
DMO
Extends coverage between DMO terminals
Types of Direct Mode equipment
• DM-GATE
Direct Mode Gateway
Gateway
TMO
TETRA
Network
DMO
Control Centre
Relays communication between DMO and TMO
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
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
Applications of Gateways and Repeaters
• Unpredictable Coverage
When users leave a vehicle, handportable coverage
may not be predictable:
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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.
Applications of Gateways and Repeaters
Using DMO in this way can be useful for:
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Police officers when operating on foot after leaving a
vehicle
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Fire crews using the appliance as a gateway or
repeater on the fire ground
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Ambulance Crews leaving the vehicle to attend to
patients
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Transportation users when parked in depots use
Gateway for communications to Trunked mode users
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
SD
S
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
No Network Coverage
Gateway
TETRA
Network
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
Gateway
PEI SDS
Position Report
Position Report
Applications of Gateways and Repeaters
• In Building Coverage
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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
Applications of Gateways and Repeaters
• Fallback operation
DMO User
Gateway
Mobile Coverage
Handportable Coverage
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
Summary
• Direct Mode provides a complementary service
to Trunked Mode operation
• Utilisation of DMO Gateways and Repeaters provides:
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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
Kamsa hamnida
Any Questions?