tetra architecture and interfaces dr. m. nouri new technologies senior manager marconi mobile
TRANSCRIPT
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TETRA ARCHITECTURE AND INTERFACES
Dr. M. NouriNew Technologies Senior Manager
Marconi Mobile
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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
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Typical TETRA Network
TETRAInfrastructure
.
Remote Line Station (Despatcher)
BSBS BSBS
BSBS BSBS BSBSBSBSAnother TETRA
Network
NMS
1a
1b3
5
6
4
2
CentralNetworkManagement
PSTN, ISDN PDN
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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
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Air Interface (AI) Variants
DMODMOAIR I/FAIR I/F
PEIPEI
TMOTMOAIR I/FAIR I/F
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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)
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TM V+D AI Services
• Speech• Data
– Circuit mode– Packet mode– Short data service
• Supplementary Services• Call Control• Mobility Management• Security Services
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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
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Direct Mode AI Scenarios
1. INDIVIDUAL CALL 2. GROUP CALL
NETWORK
3. DUAL WATCH
NETWORK
AUTHORIZINGMOBILE STATION
4. MANAGED DIRECT MODE
4
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Example: ISI Group Call Configuration
CONTROLLING ANDPARTICIPATINGNETWORK
PARTICIPATING NETWORK
ISI
ISI
REQUESTING ANDPARTICIPATING NETWORK
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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
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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
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SCN: Switching Control Node
NMS: Network Management System
BS: Base Station
Services Supported by ISI
Regional To other Local SCN
To otherTo otherTETRA NetworksTETRA Networks ISIISI
To Other Regional SCN
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Peripheral Equipment Interface (PEI)
MT2
TE2
PEI
TETRAINFRASTRUCTURE
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PEI Protocol Layers
V. 24/V. 28
PPP
IP TNP1
TCP
APPLICATIONS
TO MOBILE STATION
PEIDOMAIN
UDP
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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
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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
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TETRA as an IP 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 Center
ControlRoom
Server
Dispatcher
IP
LANServer
Database
ContentProvider
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Standard API and Applications
WAP
IP Packet Data
AVL Telemetry
CircuitMode Data
Internet Access
Proprietary
TETRA ADAPTATION LAYER
SDS
Applications
Standard API
Bearer Service
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Network Management (1)(Internal)
AuthenticationCentreNMS Client
LAN
LAN
SCN
Server ServerDisks
21” 21” 21” 21”
15” 15”
NMC
ROUTERROUTER
ROUTERROUTER21” LAN
Client
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Network Management (2) (external)
• Performance Management
• Fault or Maintenance Management
• Subscriber Management
• Accounting Management
• Security Management
TETRA 1
TETRA 3
TETRA 2
CNMCNM
NMCNMC
NMC
ISIISI
ISIISI
ISIISI
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PSTN Gateway
PSTNGW PSTN
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ISDN Gateway
ISDNGW
2B+D30B+2D
ISDN
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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
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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) which:
• 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
• 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
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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