Transcript Teltronic Conference 2005 - Beyond The TETRA Technology

Beyond the TETRA Technology
Presentation overview
INTRODUC
TION
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TERMINAL
NETWOR
K
SUMMAR
Y
Beyond the TETRA Technology
Introduction
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Introduction
What we will offer in the presentation
 The way to provide TETRA terminals with extra added value to
make easier the development of advanced applications.
 The main keys of flexibility, scalability and connectivity to
allow choosing the best option for your TETRA network topology.
 Case studies based on real situations where TETRA needs to
satisfy strong user requirements.
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Beyond the TETRA Technology
The Terminal
Driving your applications to the limit
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Beyond the TETRA Technology
The Terminal
Index of contents
• Improving the terminal capabilities
• Examples of customised scenarios
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TETRA + GPS (I)
 Some ways to improve the classical AVL (Automatic
Vehicle Location) solution

GPS information packed
in smaller messages: More
efficient in use of bandwidth.
GPS info
SDS
type 4
TETRA MS
GPS
TETRA SwMI
GPS info
CONTROL
UNIT
PEI
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USER
GPS receiver integration in
TETRA terminals: Single
TETRA + GPS devices.


LINE
DISPATCHER
STATIONS
Methods to decide about the way
and the timing to send the GPS
information: It also makes the
application more efficient in use of
system resources.
TETRA + GPS (II)
+
GPS
=
Single
terminal
message format
Standard NMEA 0183 v2.01 RMC message
SDS-T4  68 or 70 bytes (without/with TL)
Shortened GPS info (less
resolution)
SDS-T3  8 bytes
Confined area GPS
info
SDS-T2  4 bytes
GPS info (*)
• Latitude
• Longitude
• Position age
• Course
• Speed
• Time
• Position validity
• GPS receiver status
(*) some parameters can appear optionally according to
the message format
size
 GPS messages
management strategy
• by request from the
AVL control centre,
• by timeout, every
programmed time
intervals,
• by distance threshold
in a programmable value,
• automatic sending
during emergency calls.
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TETRA + GSM
 Some reasons to a dual TETRA+GSM terminal
 The possibility of communication for mobile users that often
need to leave the home coverage area increases their level of
service anywhere.
 A single MMI for TETRA and GSM operation makes easier
the user interaction.
 A compact solution reduces complexity in installations and
avoids the user managing two separate communication devices.
+
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=
Single
terminal
Interfacing the TETRA terminal
 Some ways to enhance the usability on the terminal
 Customising the MMI
• by including specific user interaction procedures adapted to certain
circumstances of use,
• by developing special user front-ends to better fit the different scenarios of
use and installation.
 Increasing the strength of the PEI
• by incorporating additional commands for complete interaction with
external control applications,
• by selecting which services are managed through the PEI and which ones
are controlled from the MMI.
 Expanding the external interaction mechanisms
• by the use of input/output control signals associated to certain events.
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Beyond the TETRA Technology
The Terminal
Index of contents
• Improving the terminal capabilities
• Examples of customised scenarios
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Advanced vehicular configuration
 Example: CONFIGURATION STRUCTURE
PC vehicular unit
Loudspeaker
MMI front-end
Hands-free mic
Foot
switch
Fist microspeaker
PTT
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Motorbike adapted equipment
 Example: CONFIGURATION STRUCTURE
Helmet audio
system
PEI & audio
PTT on handlebars
Battery
Outdoor speaker
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Bus on-board equipment
 Example: CONFIGURATION STRUCTURE
TETRA MS
Bus
driver’s
MMI
- PTT
- Emergency button
- Call request
Ambience
listening
microphone
Control unit
Telemetry
sensors
PEI
Bus driver’s
audio system
Hands-free
audio kit
Audio
interface
Passenger
information
system
engine,
speed,
doors...
control
Billing
system
data
DISPLAY
Other
peripherals
Handset
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Railways & underground train equipment (I)
 Example: CONFIGURATION STRUCTURE
MMI
console
Display
LED
indicators
Keypad
CONTROL
MODULE
Handset
Communications rack
Auxiliary
buttons
Hands free
audio system
CONTROL MODULE
VHF
analog
radio
TETRA
radio
unit
to TETRA antenna
to VHF antenna
AUDIO INTERFACE
to MMI console #n
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to train’s
control system
to passenger
audio system
Railways & underground train equipment (II)
 Example: INSTALLATION DETAILS
MMI
console
Communications rack
(TETRA + analog VHF)
Overview of
communication
devices
MMI
console
Train’s main
control system
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Beyond the TETRA Technology
The Network
A new world of flexibility and scalability
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Beyond the TETRA Technology
The Network
Index of contents
• Introduction
• Transport
• Redundancy
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Introduction to the network (I)
 A flexible topology provides the customer with different alternatives to
address the main topics of every system architecture design: transport,
redundancy, scalability and connectivity.
TRANSPORT:
Customers could already have an existing
transport network and they would like to reuse
it with the new TETRA system.
SBS
Link
SBS
SCN
IP
network
SBS
REDUNDANCY:
The only way to guarantee the lowest service
gap in case of faliure of any element in the
system.
SCALABILITY:
Early and low-cost mechanisms to upgrade
and expand the system are highly valuable.
Transport
Connectivity
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Scalability
Redundancy
CONNECTIVITY:
The system oftenly needs to be connected to
other external systems and/or applications.
Beyond the TETRA Technology
The Network
Index of contents
• Introduction
• Transport
• Redundancy
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Transport (I)
 Synchronous links:
V.35 link: Standard link in transport environments. Access
to PDH, SDH, microwaves.
Bandwidth: 64 Kbps up to 2 Mbps.
G.703/G.704: [E1 or T1]: Standard link in transport
environments. Access to PDH, SDH, microwaves. Circuit
connection to other standardised systems.
Bandwidth: 64 Kbps per slot, frame structure up to 2 Mbps.
BRI - PRI [ISDN]: Access through public networks.
Bandwidth BRI (Basic Rate Interface): 128 Kbps.
Bandwidth PRI (Primary Rate Interface): 2 Mbps.
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Transport (II)
 Asynchronous links - Layer 2:
LAN links (Layer 2 - Ethernet links):
LAN (Corporate local area networks) :
- Always through switches (instead HUB).
- Ethernet rings (Rapid Spanning tree, 802.1w).
Bandwidth: 10 Mbps, 100 Mbps, 1 Gbps.
WiFi / WiMAX:
- 2.4 GHz, 5.4 GHz (with or without license)
Bandwidth: From 1Mbps up to over 54Mbps.
Optical Fiber (using optical backbones):
- Solutions like HyperRing.
Bandwidth: 100 Mbps, 1Gbps...
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Transport (III)
 Asynchronous links - Layer 2:
SBS
SBS
SCN
WiFi
Connection
Standard Office Local Area
Network
Ethernet Switches
SBS
Optical Fiber
LAYER2 SYSTEM ACCESS:
: Ethernet connections
: Wireless connections
: Optical Fiber connections
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Fiber
Access
70 Km
Ethernet Switch
Fiber
Access
Transport (IV)
 Asynchronous Links - Layer 3:
IRB (Integrated Routing and Bridging): Point-to-point link between two
routers through WAN connection with FR (Frame Relay).
The use of DLCI (Data Link Connection Identifier) in FR allows dividing
the bandwidth for the TETRA system and corporate communications.
VPN/MPLS (Multi Protocol Labelling Switching): Using layer 2 labels it is
possible to manage the QoS of the layer 3 packets.
xDSL / NetLAN: Access points distributed around the world.
Depending of the bandwidth required is recommended to use NetLAN
connections. These are not introducing the payload packet through the
Internet world.
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Beyond the TETRA Technology
The Network
Index of contents
• Introduction
• Transport
• Redundancy
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Redundancy (I)
 Redundancy is a strong requirement for any professional
communication network:
A TETRA SYSTEM MUST BE REDUNDANT on:
BSR: Base Stations.
CNC: Switching Control Node Processor (redundant by two main units).
LINKS: Must be redundant in case of a fault in transport system.
PATHS: Different paths must be considered to connect the SCN from the SBS.
Physical Connections: Cables and hardware drivers can also fail, therefore
these must be duplicated.
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Redundancy (II)
 Redundancy strategies must be applied to any critical part
within the system:
Synchronous
World
SBS1
BSR
LAN
Asynchronous
World
SNI
G.703/G.704
E1 Link
Ethernet
Switch Redundant
Ethernet
Switch
Redundant
WAN
ISDN
E1 Link
SNI S/T
BRI Link
SNI
G.703/G.704
CNC
LAN
Ethernet
Switch
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Redundant
Physical Connections
Redundant
Ethernet
Switch
SNI S/T
SCN (Switching Control Node)
Beyond the TETRA Technology
Summary
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Maximising the user satisfaction
 In the road towards killer applications
 TETRA terminals can play a more relevant role on applications by
integrating them with complementary technologies and customising
the way to interact with the external elements.
 On the network side, flexibility+scalability+connectivity
mechanisms guarantee the feasibility almost in any solution
required.
 Suitable design strategies optimise the overall system efficiency.
Application providers should consider that.
 Manufacturers could adapt their products to better fit the users
needs for certain special scenarios, always within the
interoperability scope.
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…we will continue working to try to make your life easier.
Thank you very much for
your attention!
Further information on the
Web:
www.tetramou.com
www.teltronic.es
www.etsi.org