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TETRA ARCHITECTURE AND INTERFACES

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

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TETRA ARCHITECTURE AND INTERFACES

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  1. TETRA ARCHITECTURE AND INTERFACES Dr. M. Nouri New Technologies Senior Manager SELEX Communications & Chairman of TC TETRA WG4

  2. 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

  3. Typical TETRA Network 1b External Network Management 3 1a BS BS TETRA Infrastructure NMS 6 Another TETRA Network 2 . BS BS BS BS 5 Control Room Line Station (Despatcher) 4 PSTN, ISDN PDN

  4. Air Interface (AI) Variants DMO AIR I/F TMO AIR I/F PEI

  5. V D D D V TM V+D Air Interface Air Interface TETRA Infrastructure TDMA FRAME V Uplink TS 1 TS 2 V TS 3 V Downlink TS 4 D TS = Time Slot

  6. TM V+D AI Services • Speech • Data • Circuit mode • Packet mode • Short data service • Supplementary Services • Call Control • Mobility Management • Security Services

  7. BANDWIDTH ON DEMAND Numberof 1 2 3 4 Timeslots No 21.6 7.2 14.4 28.8 Protection Low 4.8 9.6 14.4 19.2 Protection High 2.4 4.8 7.2 9.6 Protection TM V+D AI Data Rate Capacities (kbit/s)

  8. TM V+D AI Protocol Stack CONTROL PLANE USER PLANE • Speech • Circuit Mode • Data • Mobility • Management • Packet • Data • Call Control • Short Data • Supplementary • Services MM CMCE PD Layer 3 Mobile/Base Link Control Entity Logical Link Control Layer 2 Medium Access Control Physical Layer Layer 1

  9. NETWORK 4 Direct Mode AI Scenarios 1. INDIVIDUAL CALL 2. GROUP CALL NETWORK AUTHORIZING MOBILE STATION 3. DUAL WATCH 4. MANAGED DIRECT MODE

  10. Direct Mode AI Scenarios (contd.) REPEATER GATEWAY NETWORK 6. DIRECT MODE GATEWAY 5. DIRECT MODE REPEATER REP/GW/ AUTHORIZING MOBILE REP/GW NETWORK NETWORK 7. DIRECT MODE REPEATER/ GATEWAY 8. MANAGED REPEATER/ GATEWAY

  11. DM AI Protocol Stack CONTROL PLANE USER PLANE Circuit Mode Data Call Control Intrinsic Services Speech Short Data Direct Mode Call Control Layer 3 Data Link Layer Layer 2 Physical Layer Layer 1

  12. Services Supported by ISI To Other Regional SCN To other TETRA Networks ISI To other Regional SCN Local Legend SCN: Switching Control Node NMS: Network Management System BS: Base Station

  13. ISI ISI Example: ISI Group Call Configuration CONTROLLING AND PARTICIPATING NETWORK REQUESTING AND PARTICIPATING NETWORK PARTICIPATING NETWORK

  14. Specific TETRA Operation ISI : Protocol Stack TETRA INFRASTRUCTURE 1 TETRA INFRASTRUCTURE 2 ton TETRA ANF TETRA ANF Specific TETRA Operation c TETRA operation ISI ITU-T Rec. X.229 ITU-T Rec. X.229 ISO/IEC 11582 ISO/IEC 11582 ISO/IEC 11572 ISO/IEC 11572 ETS 300 402-1 and 2 ETS 300 402-1 and 2 Layer 1 Layer 1 PRIVATE SIGNALLING SYSTEM 1 (PSS1) USED IN ISI STANDARD

  15. Inter-Network Backbone ISI IP Inter-working Interface Host Packet Data Network IPI Gp Gi Gi GGSN BG BG GGSN Gn Gn Internal Backbone Internal Backbone HDB HDB VDB VDB TETRA Infrastructure 1 TETRA Infrastructure 2

  16. Peripheral Equipment Interface (PEI) MT2 TE2 TETRA INFRASTRUCTURE PEI

  17. PEI Protocol Layers APPLICATIONS AT TNP1 PD Circuit Mode Data UDP/IP IP PPP V. 24/V. 28 TO MOBILE STATION

  18. Standard API and Applications Applications Internet Access AVL Telemetry WAP Standard API Proprietary IP Packet Data Circuit Mode Data Bearer Service SDS TETRA ADAPTATION LAYER Network

  19. TETRA Infrastructure IP and TETRA Network Content Provider Network Management System WAP Terminal IP WAP GW Internet LAN Server Database IP IP Corporate Intranet IP Switching/ Routing Network IP IP GPS IP Bluetooth Control Room Server IP IP Voice/IP Dispatcher

  20. PSTN Gateway PSTNGW PSTN

  21. ISDN Gateway 2B+D 30B+2D ISDNGW ISDN

  22. NMS Server Server Disks 15” 15” LAN Authentication Centre NMS Client 21” 21” 21” 21” ROUTER SCN Client 21” LAN ROUTER LAN Network Management (1)(Internal)

  23. Types of NM Functions • Performance Management • Fault or Maintenance Management • Subscriber Management • Accounting Management • Security Management Network Management (2) (external) TETRA 1 ISI TETRA 2 NMS NMS ISI ISI TETRA 3 NMS ENM

  24. Databases Internet Control Room Gateway (1) GSM GPS ICCS Corporate Intranet Control Room Gateway Internet Server AVL Controller Dispatchers TETRA PSTN / ISDN • IT System • Call Logging • CCTV • Paging • Fax / Email • Voice Recording • Others Legacy Radios

  25. 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 To control room application client API Client Application Server Gateway Engine To TETRA Switch Interface

  26. 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

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