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1st Ireland TETRA Conference - TETRA MoU AssociationDublin, 13th April 2005
Beyond the TETRA TechnologyBeyond the TETRA Technology
Introduction
Beyond the TETRA TechnologyTETRA MoU Association Conference
Teltronic, 2005
The contextThe context
The technology is just the way to provide the user with a certain service, not the end itself.
Users don’t normally speak the language of the technology, and so we need to be able to understand their needs and to look for the way to give them a solution.
For a complete solution, the degree of satisfaction experimented by the user depends on the quality of service they feel, independently of the technology that supports the application.
Teltronic, 2005
Introduction (I)
Introduction (II)
What we will offer in the presentationWhat 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.
Study cases based on real situations where TETRA needs to satisfy strong user requirements.
Teltronic, 2005
Introduction (III)
What we expect to achieveWhat we expect to achieve
To demonstrate -once again- that TETRA represents the best option for professional radio communications today.
To open your minds towards new ways to take benefit of such a powerful technology, also being aware of its limits and the way to overcome them.
To provide the keys to you for optimal decision making in your present and future investments in TETRA products.
Teltronic, 2005
If you still don’t believe in TETRA, If you still don’t believe in TETRA, you will starting today !you will starting today !
INTRODUCTION
TERMINAL
NETWORK
SUMMARY
Presentation overviewPresentation overview
Introduction (IV)
Teltronic, 2005
The TerminalDriving your applications to the limit
Teltronic, 2005
Beyond the TETRA TechnologyTETRA MoU Association Conference
Teltronic, 2005
Index of contents
• The role of the terminal in a system• Improving the terminal capabilities• Examples of customised scenarios
Beyond the TETRA TechnologyTETRA MoU Association Conference
The Terminal
?The role of the terminal in a system (I)
Which are the kind of elements normally requested to solve a complete application?
Multiple audio interfaces• Microspeaker• In-vehicle hands-free kit• 600Ω balanced interface• Audio recording output• Ambience listening mic input
Extended I/O capabilities• External PTT (foot-switched) input• Event-controlled outputs• Emergency signal input
Integration with other communication peripherals• GPS receiver• GSM transceiver• Analog radio transceiver
Data transmission & control• External access to data transmission services• Remote radio unit control protocol
MMI customised access• User logging• Shortcuts to user services• Software customisation at application level• Customised user front-ends
Teltronic, 2005
?The role of the terminal in a system (II)
Is there a way to optimise these kinds of extra requirements?
…by integrating into the TETRA terminal part of those elements that normally are required for such advanced scenarios.
YES !
TETRA radio unit
Audio interface
Peripheral #1
Customised MMI
USER
APPLICATION ELEMENTSAPPLICATION ELEMENTS
External I/O
Peripheral #n
External peripherals
TETRA terminalTETRA terminal
Teltronic, 2005
Teltronic, 2005
Index of contents
• The role of the terminal in a system• Improving the terminal capabilities• Examples of customised scenarios
Beyond the TETRA TechnologyTETRA MoU Association Conference
The Terminal
TETRA MS
CONTROLUNIT
GPS
PEI
GPS info SDStype 4
TETRA SwMI
LINE DISPATCHER
STATIONS
GPS info
Some ways to improve the classical AVL (Automatic Vehicle Location) solution
GPS receiver integration in TETRA terminals: Single TETRA + GPS devices.
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.
GPS information packed in smaller messages: More efficient in use of bandwidth.
USERUSER
Te
ltro
nic
, 2
00
5
TETRA + GPS (I)
TETRA + GPS (II)
Teltronic, 2005
++ == Single Single terminalterminalGPSGPS
size
Shortened GPS info (less resolution)
SDS-T3 SDS-T3 8 bytes 8 bytes
Confined area GPS info
SDS-T2 SDS-T2 4 bytes 4 bytes
GPS info (*)• Latitude• Longitude• Position age• Course• Speed• Time• Position validity• GPS receiver status
Standard NMEA 0183 v2.01 RMC message
SDS-T4 SDS-T4 68 or 70 bytes (without/with TL) 68 or 70 bytes (without/with TL)
(*) some parameters can appear optionally according to the message format
mes
sage
form
at
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.
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.
++ == Single Single terminalterminal
Teltronic, 2005
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.
Teltronic, 2005
Teltronic, 2005
Index of contents
• The role of the terminal in a system• Improving the terminal capabilities• Examples of customised scenarios
Beyond the TETRA TechnologyTETRA MoU Association Conference
The Terminal
Advanced vehicular configuration (I)
USUAL REQUIREMENTS
- Half-duplex and duplex voice calls.- Status and short data transmission.- Remote database and file access.- GPS-based vehicle location system.
Teltronic, 2005
Advanced vehicular configuration (II)
Example: CONFIGURATION STRUCTURE
PC vehicular unitPC vehicular unit
MMI front-endMMI front-end
PTTPTT
Foot Foot switchswitch
Hands-free micHands-free mic
LoudspeakerLoudspeaker
Fist microspeakerFist microspeaker
Teltronic, 2005
Motorbike adapted equipment (I)
USUAL REQUIREMENTS
- Half-duplex and duplex voice calls.- Status and short data transmission.- Outdoor operation (dust & water protection, high audio, noise cancellation).- Simplest user interaction.- GPS-based location system.
Teltronic, 2005
Motorbike adapted equipment (II)
Example: CONFIGURATION STRUCTURE
Battery
PEI & audio
Helmet audio system
Outdoor speaker
PTT on handlebars
Teltronic, 2005
Bus on-board equipment (I)
USUAL REQUIREMENTS
- Half-duplex and duplex voice calls.- Status and short data transmission.- Vehicle sensors transmission.- MMI integrated on driver’s dashboard.- Interaction with passenger information system.- GPS-based location system.
Teltronic, 2005
Bus on-board equipment (II)
Example: CONFIGURATION STRUCTURE
- PTT- PTT- Emergency button- Emergency button- Call request- Call request
Passenger information
system
Audio interface
Bus driver’s audio system
Bus driver’s
MMI
control
PEITelemetry sensors
Billing system
Other peripherals
engine, speed, doors...Control unitControl unit
DISPLAYDISPLAY
data
TETRA MSTETRA MS
Ambience listening
microphone
Hands-free audio kit
HandsetTeltronic, 2005
Railways & underground train equipment (I)
USUAL REQUIREMENTS
- Half-duplex and duplex voice calls.- Status and short data transmission.- Dual MMI console integrated on driver’s dashboards.- Interaction with passenger information system.- Interaction with on-board train computer.- Integration of multiple communication subsystems.
Teltronic, 2005
Railways & underground train equipment (II)
Example: CONFIGURATION STRUCTURE
CONTROL MODULE
VHF analog radio
TETRA radio
unit
AUDIO INTERFACE
to MMI console #n
to train’s control system
to TETRA antenna
to passenger audio system
to VHF antenna
Hands free audio systemHandset
LED indicators Auxiliary
buttons
KeypadDisplay
CONTROL MODULE
MMI MMI consoleconsole
Communications rackCommunications rack
Teltronic, 2005
Railways & underground train equipment (III)
Example: INSTALLATION DETAILS
MMI MMI consoleconsole
MMI MMI consoleconsole
Communications rack Communications rack (TETRA + analog VHF)(TETRA + analog VHF)
Overview of Overview of communication communication devicesdevices
Train’s main Train’s main control systemcontrol system
Teltronic, 2005
Teltronic, 2005
The NetworkA new world of flexibility and scalability
Beyond the TETRA TechnologyTETRA MoU Association Conference
Teltronic, 2005
Index of contents
• Introduction• Transport• Redundancy• Scalability• Connectivity
Beyond the TETRA TechnologyTETRA MoU Association Conference
The Network
Teltronic, 2005
Introduction to the network (I)
NEBULA ACRONYMS:SCN: Switching Control NodeSBS: Site Base Station
NEBULA is the TETRA infrastructure by Teltronic. It has been designed over a star configuration topology.
Teltronic, 2005
Introduction to the network (II)
TRANSPORT:Customers could already have an existing transport network and they would like to reuse it with the new TETRA system.
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.
CONNECTIVITY: The system oftenly needs to be connected to other external systems and/or applications.
A flexible topology provides the customer with different alternatives to address the main topics of every system architecture design: transport, redundancy, scalability and connectivity.
SBS
Link
SCN
SBS
SBS
IP network
Transport Redundancy
ScalabilityConnectivity
Teltronic, 2005
Index of contents
• Introduction• Transport• Redundancy• Scalability• Connectivity
Beyond the TETRA TechnologyTETRA MoU Association Conference
The Network
Teltronic, 2005
Transport (I)
Synchronous links:
BRI - PRI [ISDN]: Access through public networks.
Bandwidth BRI (Basic Rate Interface): 128 Kbps. Bandwidth PRI (Primary Rate Interface): 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.
V.35 link: Standard link in transport environments. Access to PDH, SDH, microwaves.
Bandwidth: 64 Kbps up to 2 Mbps.
Teltronic, 2005
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...
Teltronic, 2005
Transport (III)
WiFiConnection
SBS
Standard Office Local Area Network
Ethernet Switches
SBS
Optical Fiber
Fiber Access
Fiber Access
Ethernet Switch
70 KmLAYER2 SYSTEM ACCESS: : Ethernet connections : Wireless connections : Optical Fiber connections
SCN
SBS
Asynchronous links - Layer 2:
Teltronic, 2005
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.
Transport (IV)
Teltronic, 2005
Asynchronous Links - Layer 3:
• VPN / MPLS connections
• Dedicated Line (Frame Relay)
• NetLAN (not Internet access)
• xDSL (access through Internet)
System links must ensure:
Guaranteed bandwidth
• Control channel requires 16 Kbps
• Traffic channel requires 16 Kbps
Minimum transport delay
Delimited jitter
Quality of Service (QoS)
FR
ADSL
NetLAN
Transport (V)
Teltronic, 2005
Index of contents
• Introduction• Transport• Redundancy• Scalability• Connectivity
Beyond the TETRA TechnologyTETRA MoU Association Conference
The Network
Teltronic, 2005
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.
Teltronic, 2005
Redundancy strategies must be applied to any critical part within the system:
CNC
SCN (Switching Control Node)
LAN
SBS1
LAN
BSR
SNIG.703/G.704
Asynchronous
World
Ethernet Switch
Synchronous
World
SNIG.703/G.704
E1 Link
WAN RedundantE1 Link ISDN
SNI S/T
SNI S/T
BRI Link
Ethernet Switch
RedundantPhysical Connections
RedundantEthernet Switch
RedundantEthernet Switch
Redundancy (II)
Teltronic, 2005
Index of contents
• Introduction• Transport• Redundancy• Scalability• Connectivity
Beyond the TETRA TechnologyTETRA MoU Association Conference
The Network
Teltronic, 2005
Scalability
Systems must be designed to support upgrades with the minimum impact over the working network. Both software and hardware upgrades are expected to be supported.
Software upgrades (Increasing functionality):
• Background FTP to upgrade functionality.
• The system must be continuously working.
• Secondary memory bank is required.
Hardware upgrades (Expanding the network topology):
• Increasing network dimension or redundancies.
• Plug and Play.
• Hot swap connection.
Teltronic, 2005
Index of contents
• Introduction• Transport• Redundancy• Scalability• Connectivity
Beyond the TETRA TechnologyTeltronic Conference on Professional Mobile Communication
The Network
Teltronic, 2005
General connectivity concepts in NEBULA
N2A: (NIIA) NEBULA IP Interface Access
TDP: TETRA Dispatcher Protocol
Connectivity (I)
TETRADispatcherServices
Standard IP Services(PDP TETRA Services)
TCP
UDP
TCP
UDP
Telnet FTP http smtp
N2A REGISTER AND CALL
CONTROL
MONITORING
INCLUSION / LISTENING /TERMINATION
DGNA
(Simplex, Duplex, Groupcalls, Status, SDS)
TDP
VoIP (voz) RTP RTCP
Teltronic, 2005
Voice communication management (Dispatching)
SCN NEBULA
GATEWAYRDSIVoIP
VoIP (SCN RTP / RTCP)
TDP (SCN Monitoring, Calls, PTT)XML (NMS)
GATEWAYRDSI
VoIP
CNC
NMS ServerLine Dispatcher Server
FIREWALL
SNISNI
SWITCH
BackboneCorporate Network
Client SCN Line Dispatcher 1
Client SCN Line Dispatcher n
SBS NEBULA
SNI
SWITCH
FIREWALL
Client SBSLine Dispatcher 1
GATEWAYRDSIISDN
PHYSICAL CONNECTION between Line Dispatcher stations and NEBULA
Connectivity (II)
Teltronic, 2005
Summary
Beyond the TETRA TechnologyTETRA MoU Association Conference
Teltronic, 2005
TETRA is a mature technology
It is the time to start thinking more and more on the customer needs and their solutions than in the technology itself.
mature technology
Over 10 years with TETRA
standard
Demonstrated multi-vendor
scenarios
Hundreds of
references worldwide
Robustness and
performance already
demonstrated
Teltronic, 2005
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.
Teltronic, 2005
Thinking beyond TETRA
1 TETRA can now be considered as a mature and stable technology. There is
a lot of positive feedbacks from the real world. The TETRA toolbox is ready.
The user DOES NOT speak normally in TETRA language. We ALL (manufacturers, application developers, system integrators, network operators)
need to learn their language.
2
3toolboxtoolbox
Common Common languagelanguage
USER SATISFACTIONUSER SATISFACTION……thinkingthinking Beyond the TETRA TechnologyBeyond the TETRA Technology
www.tetramou.cwww.tetramou.comomwww.teltronic.eswww.teltronic.eswww.etsi.orgwww.etsi.org
Further information on the Web:
Thank you very much for Thank you very much for your attention!your attention!
……we will continue working to try to make your life easier.we will continue working to try to make your life easier.