Transcript Future Proofing of TETRA Networks Dr. M. Nouri New Technologies Senior Manager Chairman of EPT Working Group 4 (WG4) High Speed Data (HSD)

Future Proofing of
TETRA Networks
Dr. M. Nouri
New Technologies Senior Manager
Chairman of EPT Working Group 4
(WG4)
High Speed Data (HSD)
1
Summary
• Initial Planning for Expansion
• Feature / Software Release Plans
• Upgrade to Integrated TETRA1 Plus
TETRA2 TEDS (TETRA Enhanced Data
Services)
• Frequency Allocation Matters
• Conclusions
Initial Planning for Expansion
• Plan for additional switching
centres
• Plan for phased completion of
coverage
• Channel addition to base stations
as traffic grows with time
• Sizing of databases for the final
capacity
• Plan for external interfaces and
their introduction time-plan
• Subscriber differentiation via VPN
Feature Release Plans
• Identify currently available features
• Confirm the upcoming feature release
plans
• Commercial trade-off against future
functionality
• Secure a realistic timetable for feature
releases
• Take into account the need for the TIPS
process for certain features and the time
impact
What Services? What Data Speeds?
• Is single slot TETRA1 sufficient
• Do you require TETRA1 multislot operation
now or in the near future
• What are the likely speeds required for the
future
• Is low complexity low speed TEDS
sufficient
• Do you require medium or high speed TEDS
in the future
Current TETRA 1 Speeds: Multi-slot
Bandwidth on demand
Number of timeslots
1
2
3
4
No protection
7,2 14,4 21,6 28,8
Low protection
4,8
9,6 14,4 19,2
High protection
2,4
4,8
7,2
9,6
Two Technologies for TETRA2 HSD
TETRA RELEASE 2
TAPS
•
•
•
•
•
•
TETRA Advanced Packet Service
An Overlay network
Based on the E-GPRS technology
Standardisation drafting completed
Designed for PAMR market
Not deployed to date
TEDS
•
•
•
•
•
•
TETRA Enhanced Data Service
Full Compatibility with TETRA 1
Allows migration from TETRA 1
Standardisation in progress
5 technologies proposed initially
Designed for all TETRA market
sectors
Overlay TAPS plus TETRA1 Network
External IP packet data networks
IPI
TETRA1
Infrastructure
TETRA1
Infrastructure
TAPS
Infrastructure
EGPRS/
3G
networks
ISI
T2
T1
TETRA1
E-GPRS/EDGE
air interface
TETRA1
E-GPRS / 3G
air interface
Direct
Mode
T1
TETRA1 Transceiver
T2
EDGE Transceiver
E-GPRS Type Interfaces
TEDS Technology Parameters
• Multi-carrier platform with TDMA carriers.
• Adaptive selection of modulation and coding according
to propagation conditions.
• Agreed modulation schemes:
 /4 DQPSK for common control channel
 D8PSK for early migration requiring modest increase in speed
 4 QAM for efficient links at edge of coverage
 16 QAM for moderate speeds
 64 QAM for high speed
• Carrier bandwidths: 25, 50, 100 and 150 kHz.
• Expected user bit rates in the region of 30 to 400 kbit/s
• TETRA1 higher layer protocols to be adapted for TEDS.
How Do Gross Speeds Compare ?
0
150
300
kb/s
450
600
750
Note: No channel coding assumed.
64QAM / 150kHz
64QAM / 100kHz
16QAM / 100kHz
64QAM / 50kHz
16QAM / 50kHz
64QAM / 25kHz
4QAM / 50kHz
D8PSK / 25kHz
DQPSK/ 25kHz
TETRA1
691 kb/s
461 kb/s
307 kb/s
230 kb/s
154 kb/s
115 kb/s
77 kb/s
54 kb/s
36 kb/s
Integrated TEDS + TETRA1 Network
External IP packet data networks
Integrated TEDS plus
TETRA1 Infrastructure
IPI
TETRA1
Infrastructure
EGPRS/
3G
networks
ISI
T2
T1
TETRA1
T2
E-GPRS / 3G
air interface
TETRA1
TEDS+
TETRA1
Direct
Mode
T1
T1
TETRA1 Transceiver
T2
TEDS Transceiver
E-GPRS Type Interfaces
TEDS: Coverage Planning
TETRA1
TEDS
TEDS
TEDS
TEDS
TEDS
TEDS
Model 1
Four base stations with omnidirectional antennas
Model 2
One base station with TEDS
sectorized antennas
Emerging Services & Contents
Voice
Communication
Data
Communication
Hybrid
Communication
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Voice
Voice mail



E-mail
Advanced e-mail
(text, drawings,
images, video)
File transfer
Forums
Video-telephony
Screen sharing
Content Delivery
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 Services required in TETRA
networks in the near future
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
News, weather, sports
Local information
In-vehicle services
Intranet access
Information search
On-line
magazine/trade
publications
On-line banking
E-commerce/on-line
shopping
E-books download
On-line games
Music-on-demand
Video-on-demand
Travel services
advertising
Job scheduling
Multimedia Applications in TEDS
• Optional MEX layer defined for
TEDS
• Allows up to 8 multimedia
applications
• Allows QoS negotiation
–
–
–
–
Throughput
Delay
Priority
Reliability
• MEX layer can be by-passed
• QoS attributes can be adjusted
during session
Application
IP
MEX
SNDCP
MLE
LLC
MAC
TEDS RF
TEDS Terminal
Protocol Stack
Optional
Frequency Planning
• Frequency band allocation for TMO
(national)
• Frequency band allocation for DMO
• Subscriber density distribution to assist
channel allocation
• Cell re-use factor (cluster size)
• Cell sectorisation may provide benefits
• Channel allocation for the final network
• Availability of the spectrum for later TEDS
additions
Spectrum
TETRA Spectrum Assignments:
CEPT ERC Decisions 96 (01) and 96 (04)
Possible Civil Allocations
in some Countries and/or
PSS Expansion band
PAMR TETRA (Shared)
(Country Specific)
Spectrum Available Now
(in most European Countries)
Emergency Services
Early Private TETRA (PMR) Adopters
Spectrum Available Now
(Country Specific Allocations)
(in most European Countries)
Limited Spectrum available
380
390
400
410
420
430
440
PMR & PAMR (Civil TETRA)
(Country Specific Allocations)
Limited Spectrum Available
(Requires re-farming in most
Countries)
450
460
470 MHz
Spectrum (contd.)
(870-876/915-921MHz)
PMR & PAMR (Civil TETRA)
(876-880/921-925MHz)
GSM-R
870
880
890
900
910
(880-890/925-935MHz)
GSM Expansion Band
(890-915/935-960MHz)
GSM Current Band
920
930
940
950
960
MHz
Conclusions
• The TETRA standard provides a number of
provisions for future proofing TETRA
networks
• The level of these provisions is supplier
dependent
• Careful planning of TETRA networks with
due consideration for future growth and
services results in a wiser investment
• Such a network is expected to be
technologically competitive for the next 20
years
Thanks for your attention