View
240
Download
7
Category
Preview:
DESCRIPTION
TETRA ARCHITECTURE AND INTERFACES. Dr. M. Nouri New Technologies Senior Manager SELEX Communications & Chairman of TC TETRA WG4. Agenda. 1. TETRA Architecture and Standard Interfaces 2. Description of Individual Interface Network Aspects and Scenarios Services Protocols - PowerPoint PPT Presentation
Citation preview
TETRA ARCHITECTURE AND INTERFACES
Dr. M. NouriNew Technologies Senior Manager
SELEX Communications&
Chairman of TC TETRA WG4
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
Typical TETRA Network
TETRAInfrastructure
.
Line Station (Despatcher)
BSBS BSBS
BSBS BSBS BSBSBSBSAnother TETRA
Network
NMS
1a
1b3
6
5
4
2
ExternalNetworkManagement
PSTN, ISDN PDN
Control Room
Air Interface (AI) Variants
DMODMOAIR I/FAIR I/F
PEIPEI
TMOTMOAIR I/FAIR I/F
TM V+D Air Interface 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 AI Services
• Speech• Data
– Circuit mode– Packet mode– Short data service
• Supplementary Services• Call Control• Mobility Management• Security 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)
TM V+D AI Protocol Stack
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
Direct Mode AI Scenarios
1. INDIVIDUAL CALL 2. GROUP CALL
3. DUAL WATCH
NETWORK
AUTHORIZINGMOBILE STATION
4. MANAGED DIRECT MODE
4
NETWORK
Direct Mode AI Scenarios (contd.)
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
DM AI Protocol Stack
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
Legend
SCN: Switching Control Node
NMS: Network Management System
BS: Base Station
Services Supported by ISI
Regional To other Local SCN
ISIISI
To Other Regional SCNTo other TETRA
Networks
Example: ISI Group Call Configuration
CONTROLLING ANDPARTICIPATINGNETWORK
PARTICIPATING NETWORK
ISI
ISI
REQUESTING ANDPARTICIPATING NETWORK
ISI : Protocol Stack
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
IP Inter-working Interface
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
Peripheral Equipment Interface (PEI)
MT2
TE2
PEI
TETRAINFRASTRUCTURE
PEI Protocol Layers
PPP
IP
APPLICATIONS
TO MOBILE STATION
UDP/IP
AT TNP1Circuit
Mode DataPD
V. 24/V. 28
Standard API and Applications
WAP
IP Packet Data
AVL Telemetry
CircuitMode Data
Internet Access
Proprietary
TETRA ADAPTATION LAYER
SDS
Applications
Standard API
Bearer Service
IP and TETRA Network
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
PSTN Gateway
PSTNGW PSTN
ISDN Gateway
ISDNGW
2B+D30B+2D
ISDN
Network Management (1)(Internal)
AuthenticationCentreNMS Client
LAN
LAN
SCN
Server ServerDisks
21” 21” 21” 21”
15” 15”
NMS
ROUTERROUTER
ROUTERROUTER21” LAN
Client
Network Management (2) (external)
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
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
Control Room Gateway (1)
InternetServer
Control Room Gateway (2)
• 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
Conclusions 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
Recommended