MT2 TE2 TETRA INFRASTRUCTURE
PEI
PEI Protocol Layers
APPLICATIONS
TCP IP
UDP TNP1
PPP
PEI DOMAIN
V. 24/V. 28
TO MOBILE STATION
ISI : Protocol Stack
TETRA INFRASTRUCTURE 1
TM V+D AI Protocol Stack
CONTROL PLANE USER PLANE • Speech • Circuit Mode Data
• Call Control • Short Data • Supplementary Services
• Mobility Management
Typical TETRA Network
1b
3 1a
BS BS
Central Network Management
TETRA Infrastructure
NMS
5
BS
BS
BS
BS
2
Remote Line Station (Despatcher)
.Another
6
PSTN, ISDN PDN
TETRA Network
TETRA as an IP Network
WAP Terminal Network Management Center
Content Provider
WAP GW
IP
Database
LAN Server
Internet
IP IP Corporate Intranet
IP
Bluetooth
IP Switching/ Routing Network
• Performance Management • Fault or Maintenance Management
• Subscriber Management
• Accounting Management • Security Management
CNM
PSTN Gateway
PSTN GW
PSTN
ITU-T Rec. X.229 ISO/IEC 11582 ISO/IEC 11572 ETS 300 402-1 and 2 Layer 1
PRIVATE SIGNALLING SYSTEM 1 (PSS1) USED IN ISI STANDARD
IP Inter-working Interface
IP IP
Control Room Server
GPS
IP
TETRA Infrastructure
Voice/IP
IP
Dispatcher
Standard API and Applications
Applications
Internet Access
AVL
Telemetry
Standard API
ISDN Gateway
2B+D 30B+2D ISDN GW
ISDN
Control Room Gateway (1)
GSM
GPS Databases ICCS
Internet
Control Room Gateway
Dispatchers
Corporate Intranet
AVL Controller Internet Server
To Other Regional SCN To other TETRA Networks
ISI
Regional
To other Local SCN
SCN: Switching Control Node NMS: Network Management System BS: Base Station
Peripheral Equipment Interface (PEI)
21.6
14.4
19.2 9.6
2.4
4.8
7.2
TM V+D AI Services
• Speech • Data
– Circuit mode – Packet mode – Short data service
• • • •
Supplementary Services Call Control Mobility Management Security Services
4
TM V+D Air Interface
Air Interface TDMA FRAME TETRA Infrastructure
V
D V
Uplink
V D
TS 1
TS 2
V
D
Downlink
TS 3
V
D
TS 4
TS = Time Slot
Air Interface (AI) Variants
ISI
CONTROLLING AND PARTICIPATING NETWORK
PARTICIPATING NETWORK
DM AI Protocol Stack
CONTROL PLANE USER PLANE
Call Control Intrinsic Services Short Data
Circuit Mode Data
• Audio parameters • Individual and Group Users • Supplementary services • Alarms
Gateway Engine
To TETRA Switch Interface
Conclusions
TETRA 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
Host
Packet Data Network
Inter-Network Backbone
Gi
Gp
Gi
GGSN
Gn
BG
BG
Gn
GGSN
Internal Backbone
Internal Backbone
ISI
HDB TETRA Infrastructure 1 VDB HDB VDB TETRA Infrastructure 2
DMO AIR I/F
TMO AIR I/F
PEI
TM V+D AI Data Rate Capacities (kbit/s)
BANDWIDTH ON DEMAND
Number of Timeslots No Protection Low Protection High Protection 1 7.2 4.8 2 14.4 9.6 3 4 28.8
NMS Client 21” 21” 21” 21”
Authentication Centre
ROUTER SCN
Client
21”
LAN
ROUTER
LAN
Network Management (2)
(external)
ISI
TETRA 1
NMC
TETRA 2
NMC
ISI
ISI
TETRA 3
NMC
6. DIRECT MODE GATEWAY REP/GW/ AUTHORIZING MO
7. DIRECT MODE REPEATER/ GATEWAY
8. MANAGED REPEATER/ GATEWAY
Services Supported by ISI
Speech
Direct Mode Call Control Layer 3
Data Link Layer Physical Layer
Layer 2 Layer 1
Direct Mode AI Scenarios (contd.)
REPEATER GATEWAY
NETWORK
5. DIRECT MODE REPEATER
WAP
Proprietary
IP Packet Data Circuit Mode Data
Bearer Service
TETRA ADAPTATION LAYER
SDS
Network Management (1)
(Internal)
Server 15” 15”
NMC
Server Disks
LAN
TO control room application client
API Client
Application Server
• Management of following functionalities through API using API libraries or through messages :
• Facilitate Programming at a higher abstraction level • Allow integration of radio functionality in different systems • Guarantee flexibility of control center configuration • Allow GUI’s customization