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TETRA ARCHITECTURE AND INTERFACES. Dr. M. Nouri New Technologies Senior Manager OTE. Agenda. 1. TETRA Architecture and Standard Interfaces 2. Description of Individual Interface Network Aspects and Scenarios Services Protocols 3. TETRA Standard Gateways Features - PowerPoint PPT Presentation
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TETRA ARCHITECTURE AND INTERFACES
Dr. M. NouriNew Technologies Senior Manager
OTE
Agenda• 1. TETRA Architecture and Standard Interfaces• 2. Description of Individual Interface
– Network Aspects and Scenarios
– Services
– Protocols
• 3. TETRA Standard Gateways– Features
• 4. Network Management System• 5. Control Room Gateway• 6. Conclusions
TETRAInfrastructure
.
Line Station (Despatcher)
BSBS BSBS
BSBS BSBS BSBSBSBSAnother TETRA
Network
NMS
1a
1b3
6
5
4
2
ExternalNetworkManagement
PSTN, ISDN PDN
Control Room
Typical TETRA Network
DMODMOAIR I/FAIR I/F
PEIPEI
TMOTMOAIR I/FAIR I/F
Air Interface (AI) Variants
Air Interface
Uplink
DownlinkV
D
D
V
V
V
D
D
V
TDMAFRAME
TS 2
TS 3
TS 4
TS 1
TS = Time Slot
TETRAInfrastructure
TM V+D Air Interface
• Speech• Data
– Circuit mode– Packet mode– Short data service
• Supplementary Services• Call Control• Mobility Management• Security Services
TM V+D AI Services
Number ofTimeslots 1 2 3 4
NoProtection 7.2 14.4 21.6 28.8
LowProtection 4.8 9.6 14.4 19.2
HighProtection 2.4 4.8 7.2 9.6
BANDWIDTH ON DEMAND
TM V+D AI Data Rate Capacities (kbit/s)
Layer 3
Layer 1
Layer 2
• Packet Data
• Mobility Management
• Call Control• Short Data• Supplementary Services
• Speech• Circuit Mode Data
MM
Mobile/Base Link Control Entity
CMCE PD
USER PLANECONTROL PLANE
Logical Link Control
Medium Access Control
Physical Layer
TM V+D AI Protocol Stack
1. INDIVIDUAL CALL
3. DUAL WATCH
NETWORK
AUTHORIZINGMOBILE STATION
4. MANAGED DIRECT MODE
4
NETWORK
2. GROUP CALL
Direct Mode AI Scenarios
REPEATER
5. DIRECT MODE REPEATER
NETWORK
GATEWAY
6. DIRECT MODE GATEWAY
NETWORK
REP/GW
7. DIRECT MODE REPEATER/ GATEWAY
NETWORK
REP/GW/AUTHORIZING
MOBILE
8. MANAGED REPEATER/ GATEWAY
Direct Mode AI Scenarios (contd.)
Layer 1
Layer 2
Layer 3
Physical Layer
Data Link Layer
Direct Mode Call Control
Short Data
Intrinsic Services
Call Control
CONTROL PLANE USER PLANE
Speech
Circuit Mode Data
DM AI Protocol Stack
Legend
SCN: Switching Control Node
NMS: Network Management System
BS: Base Station
Regional To other Local SCN
ISIISI
To Other Regional SCNTo other TETRA
Networks
Services Supported by ISI
CONTROLLING ANDPARTICIPATINGNETWORK
PARTICIPATING NETWORK
ISI
ISI
REQUESTING ANDPARTICIPATING NETWORK
Example: ISI Group Call Configuration
TETRA INFRASTRUCTURE 2
TETRA INFRASTRUCTURE 1
ITU-T Rec. X.229
ISO/IEC 11582
ISO/IEC 11572
TETRA ANF
ton
c TETRA operation
ITU-T Rec. X.229
ISO/IEC 11582
ISO/IEC 11572
Layer 1
ETS 300 402-1 and 2
PRIVATE SIGNALLING SYSTEM 1 (PSS1) USED IN ISI STANDARD
Specific TETRA Operation
ETS 300 402-1 and 2
Layer 1
TETRA ANF
Specific TETRA Operation
ISI : Protocol Stack
BGBGGGSN GGSN
Internal BackboneInternal Backbone
Gi Gp Gi
Packet Data Network
Inter-Network Backbone
HDB VDB
TETRAInfrastructure 2
HDB VDB
Gn Gn
Host
ISI
TETRAInfrastructure 1
IP Inter-working Interface
MT2
TE2
PEI
TETRAINFRASTRUCTURE
Peripheral Equipment Interface (PEI)
PPP
IP
APPLICATIONS
TO MOBILE STATION
UDP/IP
AT TNP1Circuit
Mode DataPD
V. 24/V. 28
PEI Protocol Layers
WAP
IP Packet Data
AVL Telemetry
CircuitMode Data
Internet Access
Proprietary
TETRA ADAPTATION LAYER
SDS
Applications
Standard API
Bearer Service
Standard API and Applications
Internet
IP Switching/Routing Network
TETRA Infrastructure
CorporateIntranet
IP
IP
IP
Voice/IP
WAPTerminal
WAP GW
GPS
Bluetooth
IP
IP
IP
IP
Network Management System
ControlRoom
Server
Dispatcher
IP
LANServer
Database
ContentProvider
IP and TETRA Network
PSTNGW PSTN
PSTN Gateway
ISDNGW
2B+D30B+2D
ISDN
ISDN Gateway
AuthenticationCentreNMS Client
LAN
LAN
SCN
Server ServerDisks
21” 21” 21” 21”
15” 15”
NMS
ROUTERROUTER
ROUTERROUTER21” LAN
Client
Network Management (1)(Internal)
Types of NM Functions
• Performance Management
• Fault or Maintenance Management
• Subscriber Management
• Accounting Management
• Security Management
TETRA 1
TETRA 3
TETRA 2
ENMENM
NMSNMS
NMS
ISIISI
ISIISI
ISIISI
Network Management (2) (external)
ControlRoom
Gateway
GPS
Dispatchers
GSM
TETRA
ICCS
AVL Controller
Internet
CorporateIntranet
PSTN / ISDN
LegacyRadios
Databases
• IT System• Call Logging• CCTV• Paging• Fax / Email• Voice Recording•Others
InternetServer
Control Room Gateway (1)
• Not standardized because of different applications requirements from different user sectors • Current trend is to include Flexible Application Programming Interfaces (APIs) to facilitate communication with the API client
• Management of following functionalities through API using API libraries or through messages :
• Audio parameters• Individual and Group Users• Supplementary services• Alarms
Gateway
Engine Gateway
Engine
API ClientAPI Client
Application Server
Application Server
To TETRA Switch Interface
To control room application client
Control Room Gateway (2)
TETRA Architectures and Interfaces allow:• Spectrally-efficient feature rich communication• Choice of trunked or direct modes• Interoperability between different TETRA networks• Multimedia services and Internet access • Extensive data applications capability• Inter-working with public networks• Use of control room gateways in public safety and other
sectors
Conclusions