TETRA ARCHITECTURE AND INTERFACES

1
TETRA ARCHITECTURE AND INTERFACES

• Dr. M. Nouri
• Marconi Mobile

2
Agenda

• 1. TETRA 1 Architecture and Standard Interfaces
• 2. Description of Individual Interface
• Network Aspects and Scenarios
• Services
• Protocols
• 3. TETRA Standard Gateways
• Features
• 4. TETRA Release 2 Architecture and Interfaces
• 5. Conclusions

3
Typical TETRA Network
1b
Central Network Management
3
1a

BS
BS
TETRA Infrastructure
NMS
5
Another TETRA Network
2
.
BS
BS
BS
BS
6
Remote Line Station (Despatcher)
4
PSTN, ISDN PDN
4
Air Interface (AI) Variants
DMO AIR I/F
TMO AIR I/F
PEI
5
TM VD Air Interface
Air Interface
TETRA Infrastructure
TDMA FRAME
V
Uplink
TS 1
TS 2
V
TS 3
V
Downlink
TS 4
D
TS Time Slot
6
TM VD AI Services

• Speech
• Data
• Circuit mode
• Packet mode
• Short data service
• Supplementary Services
• Call Control
• Mobility Management
• Security Services

7
TM VD AI Data Rate Capacities
(kbit/s)
8
TM VD AI Protocol Stack
USER PLANE
CONTROL PLANE

• Speech
• Circuit Mode
• Data

• Mobility
• Management

• Packet
• Data

• Call Control
• Short Data
• Supplementary
• Services

MM
CMCE
PD
Layer 3
Mobile/Base Link Control Entity
Logical Link Control
Layer 2
Medium Access Control
Physical Layer
Layer 1
9
Direct Mode AI Scenarios
2. GROUP CALL
1. INDIVIDUAL CALL
NETWORK
NETWORK
AUTHORIZING MOBILE STATION
C
1
ABC
2
DE
GHI
4
6
MNO
PQR
9
V
XYZ
3. DUAL WATCH
4. MANAGED DIRECT MODE
10
Direct Mode AI Scenarios (contd.)
REPEATER
GATEWAY
NETWORK
6. DIRECT MODE GATEWAY
5. DIRECT MODE REPEATER
REP/GW/ AUTHORIZING MOBILE
REP/GW
NETWORK
NETWORK
7. DIRECT MODE REPEATER/ GATEWAY
8. MANAGED REPEATER/ GATEWAY
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DM AI Protocol Stack
CONTROL PLANE
USER PLANE
Circuit Mode Data
Call Control
Intrinsic Services
Speech
Short Data
Direct Mode Call Control
Layer 3
Data Link Layer
Layer 2
Physical Layer
Layer 1
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Services Supported by ISI
To Other Regional SCN
To other TETRA Networks
ISI

To other
Regional
SCN
Local
SCN Switching Control Node NMS Network
Management System BS Base Station
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Example ISI Group Call Configuration
CONTROLLING AND PARTICIPATING NETWORK
REQUESTING AND PARTICIPATING NETWORK
PARTICIPATING NETWORK
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ISI Protocol Stack
TETRA INFRASTRUCTURE 1
TETRA INFRASTRUCTURE 2
ton
TETRA ANF
TETRA ANF
Specific TETRA Operation
c TETRA operation
ISI
ITU-T Rec. X.229
ITU-T Rec. X.229
ISO/IEC 11582
ISO/IEC 11582
ISO/IEC 11572
ISO/IEC 11572
ETS 300 402-1 and 2
ETS 300 402-1 and 2
Layer 1
Layer 1
PRIVATE SIGNALLING SYSTEM 1 (PSS1) USED IN ISI
STANDARD
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IP Inter-working Interface
Host
Packet Data Network
IPI
Gp
Gi
Gi
BG
BG
GGSN
GGSN
Gn
Gn
Internal Backbone
Internal Backbone
HDB
HDB
VDB
VDB
TETRA Infrastructure 2
TETRA Infrastructure 1
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Peripheral Equipment Interface (PEI)
MT2
TE2
TETRA INFRASTRUCTURE
PEI
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PEI Protocol Layers
APPLICATIONS
TCP
UDP
IP
TNP1
PEI DOMAIN
PPP
V. 24/V. 28
TO MOBILE STATION
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Standard API and Applications
AVL
Telemetry
Internet Access
Applications
WAP
Standard API
Proprietary
IP Packet Data
Circuit Mode Data
Bearer Service
SDS
TETRA ADAPTATION LAYER
Network
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TETRA as an IP Network
Content Provider
Network Management Center
WAP Terminal
IP
WAP GW
Internet
LAN Server
Database
IP
IP
Corporate Intranet
IP Switching/ RoutingNetwork
IP
IP
GPS
IP
Bluetooth
Control Room Server
IP
IP
Voice/IP
Dispatcher
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Line Station Interface (LSI)
LINE STATION
TETRA INFRASTRUCTURE

BS
BS
ISDN
LSI
BS
BS
BS
BS
BS
Connectivity Options
LSI

• Basic Rate ISDN
• Primary Rate ISDN
• 64 kbit Leased Line

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Central Network Management Interface
TETRA 1

ISI
TETRA 2
LNM
LNM
ISI
ISI
TETRA 3
LNM

• Performance Management
• Fault or Maintenance Management
• Subscriber Management
• Accounting Management
• Security Management

CNM
22
PSTN Gateway
PSTNGW
PSTN
23
ISDN Gateway
2BD 30B2D
ISDNGW
ISDN
24
PDN Gateway
LAN Server
Database
X.25 X.75
PDNGW
PDN
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What next for TETRA?
TETRA RELEASE 2
TAPS
TEDS

• TETRA Enhanced Data Service
• Full Compatibility with TETRA 1
• Allows migration from TETRA 1
• Standardisation in progress
• 5 technologies proposed
• Designed for all TETRA market
• sectors

• TETRA Advanced Packet Service
• An Overlay network
• Based on the EDGE technology
• Standardisation drafting completed
• Designed for PAMR market

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TAPS Architecture Interfaces
External Packet Data Networks
Gi
Gi
Gi
IPI (Gp)
GSM/ E-GPRS
TAPS OVERLAY
Gp
ISI (Gr)
Gr
Gi, Gp Gr standard interfaces used in E-GPRS
networks
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TETRA in 3G Era
Network Management
Service Nodes
Customer Care Billing
UMTS Core Network Transit Layer
Network Management
TETRA1 Access
Gateway
TETRA Infrastructure
UMTS Access
GSM Access
TAPS Access
TETRA1 TEDS Access
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Conclusions

• TETRA 1 Architectures and Interfaces allow
• Spectrally-efficient feature rich communication
• Choice of trunked or direct modes
• Interoperability between different TETRA
  networks
• Multimedia services, Internet access and mobile
• office capability
• Extensive data applications capability
• Inter-working with public networks
• High level of security
• TETRA Release 2 provides the future upgradability
  and high
• speeds required in the 3G era.