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DA TDMA

DA TDMA. 4 NODES Temasek Polytechnic, Singapore NTU, Singapore USM, Malaysia UPM, Malaysia. diagram 1.doc. Network Characteristics. TDM/ DVB outbound TDMA inbound Overlay DAMA Bandwidth on Demand IP Encapsulation. TDM/SCPC. TDM/TDMA. Network Topology. Network Topology-2.

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DA TDMA

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  1. DA TDMA 4 NODES • Temasek Polytechnic, Singapore • NTU, Singapore • USM, Malaysia • UPM, Malaysia

  2. diagram 1.doc

  3. Network Characteristics • TDM/ DVB outbound • TDMA inbound • Overlay DAMA • Bandwidth on Demand • IP Encapsulation

  4. TDM/SCPC

  5. TDM/TDMA

  6. Network Topology

  7. Network Topology-2

  8. Network Topology-3

  9. Load Switching

  10. Network is operating in STDMA mode with no load present at the remote D(F1) M(F2) D(F2) M(F1) SCPC Demodulator is parked

  11. 1 Satnet port buffer status is captured and sent to the STDMA Hub Controller 3 VMS receives request, and if a free demod and space segment are available, sends switch command 2 STDMA Controller detects pre-selected buffer limits and sends Automatic Switch Request (ASR) to the VMS D(F1) M(F2) D(F2) M(F1)

  12. 1 Satnet port buffer status is captured and sent to the STDMA Hub Controller 3 VMS receives request, and if a free demod and space segment are available, sends switch command 2 Modulator is tuned to send SCPC inbound to the hub STDMA Controller detects pre-selected buffer limits and sends Automatic Switch Request (ASR) to the VMS 4 Demodulator is tuned to receive SCPC Inbound from remote SCPC demod monitors buffer utilization and sends request to VMS to switch up or down based on traffic conditions 4 5 D(F1) M(F3) D(F2) M(F1) D(F3)

  13. Application Switching(described in SHOD)

  14. SINGLE HOP ON DEMAND

  15. SHOD IN OPERATION D(F1) M(F2) D(F2) M(F1) D(F1) M(F2)

  16. SHOD IN OPERATION 3 1 Remote 1 Sends Automatic Switch Request (ASR) to VMS User Calls Remote 2 D(F1) M(F2) D(F2) M(F1) 2 Remote 2 Answers Call D(F1) M(F2) Remote 2 Sends Automatic Switch Request (ASR) to VMS 3

  17. SHOD IN OPERATION VMS RX’s ASRs and Sends out a Multicast Which Tunes Mods & Demods Simultaneously 4 3 1 Remote 1 Sends Automatic Switch Request (ASR) to VMS User Calls Remote 2 D(F1) M(F3) D(F4) D(F2) M(F1) 2 D(F3) Remote 2 Answers Call D(F4) Firewalls are dynamically added to prevent non-management traffic from looping back to the remote networks D(F1) M(F4) 4 D(F3) Remote 2 Sends Automatic Switch Request (ASR) to VMS 3

  18. POSSIBLE APPLICATIONS • TELEMEDICINE • MCS VIDEO CONFERENCING • DISTANCE EDUCATION

  19. ASSOCIATION WITH PARTICIPANTS • NTU, Singapore • VARIOUS PROJECTS • TELEMEDICINE • Ku BAND TESTS • USM, Malaysia • PARTNERS IN ASIAN INTERNET INTERCHANGE INITIATIVE • DISTANCE EDUCATION • SEVERAL OTHER PROJECTS

  20. THANK YOU SICU

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