TETRA Congress Warsaw, 13.-14.6.2006
TETRA Data Services & Applications
Hannu Vilppunen
Warsaw June 2006
Presented by Risto Toikkanen
Contents
Basic data services in TETRA
The concern about data speed
TETRA data applications, examples
Wireless Application Protocol, WAP
Towards higher data speeds
Conclusions
Basic data services in TETRA
Status messages– efficient, real time
Short Data Service, SDS– text messaging +
application platform
IP packet data– advanced applications,
opens the world of Intranet and Internet connectivity
Circuit mode data– for specialized applications,
rarely used
36 kbits/sgross bit
rate
4 channels
1 2
3 4
Carrier
Status messages
• Data sent as 16 bit numeric values• 32768 values free for use, the rest
reserved for system use• Converted into text in the receiving
terminal or workstation• Fast and efficient• Easy to use• Sent over control channel, do not
load traffic channels
Short Data Service• Four SDS-types specified by TETRA
standard: SDS-1, SDS-2, SDS-3 and SDS-4 TL
• SDS-1, -2 and -3 are fixed length (16, 32, 64 bits)
• SDS-4 TL is variable length (max 1278 bits). Protocol identifier defines how SDS-4 is used, most typical use is text messaging (140/160 chars) and AVL
• Data sent over control channel or traffic channel (simultaneous voice and data)
• Text entry using the keypad of the phone, single device for voice and data
MM05 11:28 p12553: VIPs arriving in 5 minutes at gate 23, prepare security and transport.
OK
Hello, I will be back in the ioffice in 15 minutes. I will call you then. John
OK
IP-packet data
• Similar to the GPRS service in GSM networks
• Enables advanced data applications
• Enables Intranet and Internet connectivity
• Excellent application platform
• Uses traffic channel, single slot or multiple time slots
TETRA data services enable a wide range of applications
• Database access• Image communications• Intranet/internet access• Reporting• e-mail, calendar• Workforce management • CC&C system integration • File transmission• Information push, alarm
distribution• Information pull • Control and monitoring,
telemetry
TETRA fullfils 95% of daily data needs
TETRA GPRS EDGE 3G
Data speed < 28 kbps < 40kbps < 160kbps < 1Mbps
Multimedia services Text, images
Text, images
Text, images, video
Text, images, video
Internet/intranet access Yes Yes Yes Yes
Complementing non-criticalservices 5%
Fundamental daily services 95%
Complementary wireless data services can be used to complement non-critical data services, if necessary
The concern of data speed• Single slot IP packet data provides approximately 3 … 4 kbps
payload
• Multislot data increases performance but has side effects– Increased power consumption in handsets– Decreases voice capacity
• Robust basic data services more important than extreme speeds especially in public safety
• Majority of daily data services consist of low data volume database queries in the range of 0.5 … 10 kB per transaction
• Smart applications are more important than the raw data speed, bloated applications will eat available bandwidth, no matter how much bandwidth is available
The concern of data speed, example
• Original photo image taken with a digital camera. Original size is 1600x1200 and file size 1MByte
• Pixel size of a TETRA handheld terminal typically 100 x 130 pixels
• Compression and optimization for 100x130 pixel screen shrinks the 1MByte image into 7 kilobytes
100 x 130 x 16 (colour) = 26 kBytes
With further optimisation and compression from 26 kB to 7 kB
Optimized for handportable radio’s screen 7 kB
Example of an integrated, smart application
• Police field command application using AVL, on-board databases, status messaging, text messages and IP packet data
• Minimizes over-the-air data, yet very graphics intensive and informative
Touch-screen display for ease of use
Touch screen buttons, which can be activated by the user …
… or even to a on screen touch screen keyboard for easy messaging
Underlaying AVL application
On screen AVL map with touch screen action buttons …
813
812
Off-duty
Car chase
Not in car
At scene
Transport
On the way
Free
F9MOB
POKE/K1F1Show
F7Forms/En
F6Equipment
F3Status
F4Maps/AVL
F2Report/His
F8Setup
F5Messages
814
811
ZOOM--
ZOOM+
AVL-map changes into an aerial photo of the same area, when zoom-in button is pressed repeatedly …
C14
U12
F9MOB
F1Show
F7Forms/En
F6Equipment
F2Report/His
F8Setup
F5Messages
P15
A32
ZOOM--
ZOOM+
Act.AVL
Add Mark
Show all
Vector
Hide
F3Status
F4Maps/AVL
F1Show
F7Forms/En
F6Equipment
F3Status
F4Maps/AVL
F2Report/His
F8Setup
F5Messages
F9MOB
ZOOM--
ZOOM+
Act.AVL
Add Mark
Show all
Vector
Hide
Parking 1
Security
VIPHigh security area
U12
A32
C14
P15
Onboard static graphics information combined with dynamic location of GPS-equipped field units
Send only the necessary information over the air
• Keep high volume, ‘static’ data (maps, images, floorplans of buildings) in onboard databases
• Update static data at the station using fixed LAN or WLAN
• Over the air information is typically low volume:– Location information– Status of field units– Text messaging– Compressed images
More examples of applications using TETRA data services
Automatic Vehicle/Person Location, AVL / APL
• Integrated GPS in new terminals
• Position of every unit in real time
– Location shown on GIS at Command and control room
• TETRA SDS or TETRA IP can be used to deliver location information
• New ETSI LIP standard for compact SDS location information, 76 bits instead of about 200 bits
Image communication
• ”One picture paints thousand words”• TETRA IP one slot packet data is
sufficient for image transmission• Image compression technologies reduce
data volumes for fast transmission, e.g. JPEG2000
• Retrieve images from a database (pull)• Send images from command and control
centre (push)• Increases efficiency and officer safety
Wireless Application Protocol (WAP)
• Specified to create a global protocol to work across differing wireless network technologies
• WAP offers bearer independence• Allows applications developed to work across TETRA and GSM and
GPRS• Optimised for the constraints of handheld devices
Application Portal2. Locate
3. Mail
4. Report
5. Search
Link Menu
WAP Server
Benefits of WAP
• Single device for voice and data,no need for external devices to use data services
• Instant and easy access anywhere, short handshaking delay• User-friendly interface for applications• Applications reside in serves, easy to update, no modifications needed
in the handsets
Example of WAP user interface, vehicle check
POLICE WAPLogin
OK
LoginPolice ID
Password
Login
POLICE WAPPersonVehicleFineLogout
OK
p89925
••••••
Vehicle SearchPlate:
Vehicle Class:
Search
JEE-398Toyota 5d RAV4STW 1.8-ZCA26L-AWMNKW/249SILVER/METAL
More
Checked: 24.09.2004In use since:17.10.2000OwnerHolderTechnical
OK
JEE398
1
What about the future ?
TETRA High Speed Data
• TETRA high speed data is part of TETRA 2 standardization
• TETRA HSD will complement the current TETRA services with higher data speeds
• User experience comparable to GPRS/EDGE
• Very spectrum-efficient• Adapts its speed (modulation)
when necessary
Development continues
Evolution
TETRA High Speed Data
Time
Integrated GPS
Colours
Next …
Imagecommunication
Advanced locationapplications
Java
Situationawareness
Multi-slot packet data
Summary
• TETRA provides a rich set of basic and advanced data services
• Data applications complement TETRA voice services
• IP over TETRA is a solid and robust platform for data applications
• Accessing data from the field opens totally new opportunities for public safety and other user segments
• Data speed in TETRA IP cover the majority of current needs