DA TDMA 4 NODES 1.Temasek Polytechnic, Singapore 2.NTU, Singapore 3.USM, Malaysia 4.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

Network Topology-3

Load Switching

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

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

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

Application Switching (described in SHOD)

SINGLE HOP ON DEMAND

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

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

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

POSSIBLE APPLICATIONS TELEMEDICINE MCS VIDEO CONFERENCING DISTANCE EDUCATION

ASSOCIATION WITH PARTICIPANTS 1.NTU, Singapore VARIOUS PROJECTS TELEMEDICINE Ku BAND TESTS 2.USM, Malaysia –PARTNERS IN ASIAN INTERNET INTERCHANGE INITIATIVE –DISTANCE EDUCATION –SEVERAL OTHER PROJECTS

THANK YOU SICU