Introduction to TETRA Over IP TOIP

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Introduction to TETRA Over IP (TOIP)

• Ranko Pinter
• Simoco Digital Systems

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Topics

• TETRA Over IP Overview
• TOIP Communications and Distributed Intelligence
• NW Architecture options
• Network Management
• Gateways, NW Connections, Multi-media Integration
• Key Benefits

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Conventional NW - with Central Switch
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TETRA Over IP Network
NW Management Centre
Dispatcher
PABX Gateway
DATA Gateway
NW Manager
LAN
Main Router
X21 or G703
X21 or G703
TETRA Radio Site
Remote NMWS
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TETRA Over IP Key Features (1/2)

• TOIP is a PRIVATE Network comprising 3
  sub-networks prioritised as
• Voice and bulk Data traffic, PTT signalling
• Call Control, SDS and mobility signalling
• Network Management services
• Dimensioned to meet User performance needs
• Router capacity typically far exceeds TETRA
  requirements
• NW links matched to Base Site configuration

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TETRA Over IP Key Features (2/2)

• Comprehensive Network and Subscriber management
• Data is replicated across the network no
  requirement for central processing elements
• TETRA traffic carried as IP packets
• TOIP Network uses standard IP techniques such as
  IP Unicast (point-to-point) and IP Multicast
  (point-to-multipoint), with dynamic membership of
  multicast groups to manage call process

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Call Set-up and Routing 1/2
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Call Set-up and Routing 2/2

• IP Multicast improves bandwidth efficiency - a
  Group Call only involves sites where registered
  Group members are registered
• IP Multicast permits call traffic to be easily
  routed to a Dispatcher and/or Digital Recorder.

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Distributed Database

• The NW Management Centre ..
• Holds master copy of Subscriber database
• Holds Call Records, NW Configuration, Non-dynamic
  data
• Holds back-up of Radio Site database

• Each TETRA Radio Site has
• Subscriber profile database, and
• Mobility database that records which subscribers
  have entered and left the Cell
• Radio Sites exchange Mobility database updates
  via the NW

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Database Synchronisation

Radio Site 1
Radio Site 2
NW Management Centre
Radio Site 3
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IP Networks - Distributed Intelligence
Radio Site 1
Subscriber databaseMobility database
ReferenceData base

• Secure protocol carriesdatabase updates

Radio Site 2
Subscriber databaseMobility database
Radio Site 3
Subscriber databaseMobility database
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Database Features and Benefits

• Features
• Local database at each Radio Site holds
  registration and de-registration data
• Main database located at the management centre
• Constant updates using IP Multicast between
  reference database and local databases
• Time stamping of data for inconsistency resolving
• Benefits
• Multi site operation is still allowed even if
  part of the network fails or main database is
  unreachable.
• Main information is not lost (billing, rights,
  changes)

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Architecture Options 1/4
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Architecture Options 2/4
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Architecture Options 3/4
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Architecture Options 4/4
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IP Network Architecture Benefits

• IP Network is modular and very scalable
• Network flexibility gives best balance between
  transmission costs and required resilience
• Gateways, dispatchers can be located at any point
  on the network
• TETRA IP Network can share ATM or Frame Relay
  backbone with other communications services
• IP parts of the Network use off-the-shelf
  routers and Ethernet switches and benefit from
  Internet-driven performance improvements

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Network Management

• Network Management Centre
• subscriber management
• network configuration
• network monitoring
• network maintenance
• call data record collection
• Technology
• PC based, uses open industry standards
• Simple Network Management Protocol (SNMP) HP
  OpenView
• Supports multiple Manager workstations

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TETRA Subscriber Management

• Class of Service (100 max)
• call types allowed
• access to PBX, PSTN
• priority levels
• Group definitions
• Group identities
• class of service
• registration area

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Gateways and Network Connections
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Global Optimised Architecture
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TETRA Over IP Summary of Benefits

• Resilience
• Flexibility
• Convergent technology
• Multi-media technology, combining voice, data and
  images
• Continuous performance improvements driven by IP
  market

TETRA Over IP The future-proof Technology!