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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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Presentation Transcript
da tdma
DA TDMA

4 NODES

  • Temasek Polytechnic, Singapore
  • NTU, Singapore
  • USM, Malaysia
  • UPM, Malaysia
network characteristics
Network Characteristics
  • TDM/ DVB outbound
  • TDMA inbound
  • Overlay DAMA
  • Bandwidth on Demand
  • IP Encapsulation
slide11

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

slide12

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)

slide13

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)

slide16

SHOD IN OPERATION

D(F1)

M(F2)

D(F2)

M(F1)

D(F1)

M(F2)

slide17

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

slide18

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

possible applications
POSSIBLE APPLICATIONS
  • TELEMEDICINE
  • MCS VIDEO CONFERENCING
  • DISTANCE EDUCATION
association with participants
ASSOCIATION WITH PARTICIPANTS
  • NTU, Singapore
    • VARIOUS PROJECTS
    • TELEMEDICINE
    • Ku BAND TESTS
  • USM, Malaysia
    • PARTNERS IN ASIAN INTERNET INTERCHANGE INITIATIVE
    • DISTANCE EDUCATION
    • SEVERAL OTHER PROJECTS