Upload
others
View
17
Download
0
Embed Size (px)
Citation preview
TETRA ARCHITECTURE AND INTERFACES
Dr. M. NouriNew Technologies Senior Manager
Marconi Mobile
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
.
Remote Line Station (Despatcher)
BSBS BSBS
BSBS BSBS BSBSBSBSAnother TETRA
Network
NMS
1a
1b3
5
6
4
2
CentralNetworkManagement
PSTN, ISDN PDN
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
Air Interface (AI) Variants
DMODMOAIR I/FAIR I/F
PEIPEI
TMOTMOAIR I/FAIR I/F
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 Services
• Speech• Data
– Circuit mode– Packet mode– Short data service
• Supplementary Services• Call Control• Mobility Management• Security Services
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
NETWORK
3. DUAL WATCH
NETWORK
AUTHORIZINGMOBILE STATION
4. MANAGED DIRECT MODE
4
Example: ISI Group Call Configuration
CONTROLLING ANDPARTICIPATINGNETWORK
PARTICIPATING NETWORK
ISI
ISI
REQUESTING ANDPARTICIPATING NETWORK
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
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
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
Peripheral Equipment Interface (PEI)
MT2
TE2
PEI
TETRAINFRASTRUCTURE
PEI Protocol Layers
V. 24/V. 28
PPP
IP TNP1
TCP
APPLICATIONS
TO MOBILE STATION
PEIDOMAIN
UDP
ISI : Protocol StackTETRA
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
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
Standard API and Applications
WAP
IP Packet Data
AVL Telemetry
CircuitMode Data
Internet Access
Proprietary
TETRA ADAPTATION LAYER
SDS
Applications
Standard API
Bearer Service
Network Management (1)(Internal)
AuthenticationCentreNMS Client
LAN
LAN
SCN
Server ServerDisks
21” 21” 21” 21”
15” 15”
NMC
ROUTERROUTER
ROUTERROUTER21” LAN
Client
Network Management (2) (external)
• Performance Management• Fault or Maintenance Management• Subscriber Management• Accounting Management• Security Management
TETRA 1
TETRA 3
TETRA 2
CNM
NMCNMC
NMC
ISIISI
ISIISI
ISIISI
PSTN Gateway
PSTNGW PSTN
ISDN Gateway
ISDNGW
2B+D30B+2D
ISDN
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) 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
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