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Advantech vsat day_2012
The document discusses advancements in the VSAT industry, emphasizing the importance of dynamic adaptation in satellite access technologies, specifically through the use of Adaptive Satellite Access Technology (A-SAT). A-SAT optimizes satellite efficiency and minimizes operational costs by adapting to varying traffic demands and enabling flexible access schemes. It highlights past experiences and developments in KA and V band technologies, underscoring Advantech Wireless's role in enhancing network performance and resource utilization.
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Advantech vsat day_2012
- 1. 111 SMALL STEPS TOWARDS RISKMITIGATION Claudio Frugis Head manager Advantech Wireless do Brasil VSAT Day 2012 – Rio de Janeiro
- 2. 2 Scope The VSAT industryis continually changing as new technologies, frequencies, applications and platforms are brought to market. DVB-S→ DVB-S2→ DVB-S3(?) Ka-Band →V Band Hardware costs drop 30% every 10 years Throughput increases x10 every 10 years 2 Small Steps Towards Risk Mitigation
- 3. 3 Scope To what extentdo costs have to be driven down further? Are there products in place that enable greater innovation by service providers? What are the market implications? 3 Small Steps Towards Risk Mitigation
- 4. 4 Ka & VBand Experience Canadian Space Agency (CSA) program started in early 1990s for communications for Canada in 2000 and beyond. Advantech Wireless (part of Spar Aerospace) led Ka Band study in the early 1990s with Telesat, Norsat, Comdev Study identified Ka Band as the next major new technology SES BBI (ARCS) Program Delivered DVB-RCS system based on Ka Band inbounds and Ku Band outbounds (2000) CSA V Band Program Advantech Wireless (with MDA, Telesat, Comdev) investigated use of V Band Delivered 2 DVB-RCS Ka Band hubs to Telesat for Vancouver and Winnipeg Delivered 3 DVB-RCS Ka Band hubs to DISA for WGS
- 5. DVB-RCS Experience DVB-RCS Open Standard Advantechinstrumental in creation of air interface Based on SES Astra BBI Program delivered by Advantech in 2000 Designed from top down as broadband network Original SES Astra BBI hub capable of supporting 200K subscribers 5
- 6. DVB-RCS Experience DVB-RCS Multi-Carrier Demodulator World’sMost Advanced Supports up to 96 carriers on a single card Throughput up to 24 Mbps Multiple carrier rates on a single card Flexible architecture to optimize MF-TDMA frame structures Encapsulation formats Signalling overhead And much more! 6 Advantech Wireless’ Industry-leading MCD2
- 7. 7 Introduction Main driver tolower OPEX Efficient use of satellite resources Critical for efficiency A satellite access technique well matched to the network traffic and applications Increasing demand for improved satellite efficiency Scarcity of bandwidth in certain markets How can this be achieved ? 7
- 8. 88888 Review of Satellite Network AccessTechnologies
- 9. 9 Network Access Review: DVB-RCSTDMA Star/SCPC PTP Architecture DVB-RCS Star Network with SCPC point-to-point (PTP) overlay DVB-RCS hub station for RCS signaling, synchronization, MF- TDMA access and SCPC PTP connection control/bandwidth allocation (SCPC DAMA) SCPC PTP overlay uses DVB-S2 coding and modulation Satellite terminal indoor unit (S6520) with second DVB-S2 demodulator 9
- 10. 1010 Comparison of SCPCvs TDMA SCPC Physical layer – SCPC is better than TDMA (bits/Hz) Bits/Hz→ Bits of information traffic per Hz of satellite bandwidth The higher the bits/Hz the more efficient the access scheme Less satellite resources required to carry the traffic: less OPEX TDMA Bandwidth utilization – MF-TDMA is better than SCPC or SCPC DAMA Allows sharing (statistical multiplexing) of a carrier by different sources of traffic All satellite resources are used, nothing is wasted: less OPEX Burst-like traffic (Internet browsing, SCADA, transactional, Banking Machines) Continuous streaming traffic (video, trunking data) SCPC TDMA
- 11. 11 Problem 11 Issue Define access schemeto be used at time of purchase Solution An access scheme that adapts dynamically to the requirements of the data to be transmitted from remote terminals to hub station
- 12. 12 What is A-SAT™? 12 AdaptiveSatellite Access Technology (A-SAT™) Adapts to the type of traffic to be transmitted Can dynamically switch its: Access SCPC (FDMA) DAMA or MF-TDMA DAMA Modulation QPSK, 8PSK, etc. Coding FEC strength (LDPC, TCC) and Coding Rate (1/2, 2/3, ¾, 5/6, etc.) Latency (64K, 16K, 4K LDPC block sizes vs. TCC) Encapsulation/Access Scheme in Forward and Return Link
- 13.
- 14. 1414 A-SAT™ Features Waveform &Network Topology Adaptability TDMA Best bandwidth assignment efficiency Flexibility for variable traffic Voice, VoIP Web access, etc. GSM Abis, A-Ter 3G/4G Backhaul SCPC Best physical performance Power-bandwidth efficiency For difficult and high capacity links Clear channel E1 Encapsulation Scheme MPE/MPEG TS; ATM-1, ATM-2; FR/HDLC; GSE
- 15. 15 A-SAT™ Features A-SAT™ NetworkBlock Diagram 15
- 16. 16 A-SAT™ Features High SpeedA-SAT™ Terminal DVB-RCS MF-TDMA Modem Ku-Band Transceiver Satellite Signal Canceller Option High Speed DVB-S2 Modulator IP Encapsulator Switch IP Ethernet ASI Interface L-Band L-Band S6720 High Speed A-SAT IDU L-Band Combiner/ Divider Tx Sample L-Band 16 135 Mbps DVB-S2 Inbounds (FL) 128 Kbps to 8000 Kbps TDMA (RL) 128 Kbps to 135000 Kbps SCPC (RL)
- 17. 17 A-SAT™ Features Network BlockDiagram Forward Link Subsystem FLS 100 Return Link Subsystem RLS 100 SCPC Demod Bank S6040/AMT 34/ SBD 75e Network Management System Router ForwardLink Forward LinkM F-TDM A Return Link SCPC Return Link MF-TDMAReturnLink SCPCReturnLink Forward Link SCPC Return Link MF-TDMA Return Link Forward Outbound from Gateway: up to 135 Mbps Return Inbound MF-TDMA from Terminal: up to 8 Mbps Return Inbound SCPC from Terminal: up to 45 Msps MF-TDMA/SCPC High Speed Terminal S6720 LAN/WAN Gateway MF-TDMA/SCPC Terminal S6520 Satellite Signal Canceller Option 17
- 18. 18 A-SAT™ Features Frequency planis made up of building blocks 18 Frequency Plan Management One DVB-S2 forward (outbound) TDM carrier shared by the terminals operating in either DVB-RCS MF-TDMA mode or DVB-S2 SCPC mode DVB-S2 SCPC inbound carriers (an array of carriers with defined frequency composition) DVB-RCS inbound carriers (an array of carriers with defined timeslot composition)
- 19. 19 A-SAT™ Features Operational States TDMATransmission State • No/minimal user traffic • Logged into TDMA network • Maintains network sync Request State • Traffic entering terminal reaches trigger level • Terminal transmits request to NMS for SCPC carrier assignment • NMS processes request and assigns SCPC carrier (frequency, symbol rate, etc.) SCPC Transmission State • Terminal switches from TDMA to DVB-S2 SCPC transmission • Terminal transmits data from user data queue until a threshold is met indicating minimal or no data to be transmitted • Terminal reverts back to TDMA Transmission State 19
- 20.
- 21. A-SAT™ Performance Carrier AccessEfficiency Expressed as bits/Hz, i.e., throughput achieved in available bandwidth. SCPC is very efficient if carrier is fully utilized. See figure. MF-TDMA is more efficient than SCPC at 50% utilization or less. 21
- 22. A-SAT™ Performance Carrier AccessEfficiency Expressed as bits/Hz, i.e., throughput achieved in available bandwidth. SCPC is very efficient if carrier is fully utilized. See figure. MF-TDMA is more efficient than SCPC at 50% utilization or less. 22
- 23. A-SAT™ Performance Carrier AccessEfficiency Expressed as bits/Hz, i.e., throughput achieved in available bandwidth. SCPC is very efficient if carrier is fully utilized. See figure. MF-TDMA is more efficient than SCPC at 50% utilization or less. 23
- 24. A-SAT™ Performance Carrier AccessEfficiency Expressed as bits/Hz, i.e., throughput achieved in available bandwidth. SCPC is very efficient if carrier is fully utilized. See figure. MF-TDMA is more efficient than SCPC at 50% utilization or less. 24
- 25. 25 A-SAT™ Performance Measures accessperformance (bits/Hz) in real networks with mixed traffic sources Compares network throughput to required overall bandwidth when statistical multiplexing of incoming traffic is considered 25 Statistical Gain
- 26. A-SAT™ Performance Statistical Gain:Ratio of inbound network throughput to the occupied bandwidth at various traffic densities. Traffic Density: Percentage of terminal population operating at peak data rate. Remainder of terminals operating at average data rate. Average Data Rate: Data rate assumed per terminal averaged over extended time. Here, average data rate is assumed to be 20% of peak data rate. 26
- 27. 27 A-SAT™ Performance Statistical Gain Conclusionsdrawn from chart Traditional SCPC Bits/Hz Calculation Assumes 100% Traffic Density Does not account for typical Traffic Densities less than 100% In varying traffic profiles equally important is the statistical multiplexing gain Considers traffic profile and ability to achieve statistical multiplexing gain of different waveform/access modes Achieves superior performance for both SCPC or TDMA Traffic Density profile is continually changing due to Applications Time of the day Geographical spread Packet sizes: data or VoIP (Encapsulation) 27
- 28. 28 A-SAT™ Performance Transponder LeaseCosts Assumes 20 MHz per month for SCPC as baseline Assumes $4,000 per MHz per month A-SAT always most cost effective in space segment lease. Annual savings could exceed $250K 28
- 29. 29 A-SAT™ Performance Percentage Improvementover SCPC-Only Solution TDMA-only solution not effective when traffic density exceeds 50% A-SAT™ solution always better than or equal to SCPC-only solution 29
- 30.
- 31. A-SAT™ Summary Technology dynamicallyadapts the satellite physical link to maximize efficiency based on application and traffic flow Statistical multiplexing provides huge gains by sharing bandwidth among many users Satellite efficiency is optimized using continuous carrier transmission (SCPC) waveforms, such as DVB-S2 or TCC for low speed, low latency 31 TDMA transmissionBurst-like traffic flow SCPC transmissionConstant traffic flow
- 32. A-SAT™ Summary 32 Minimizes operationcosts Maximizes satellite bandwidth efficiency A-SAT™ Enables dynamic switching between different access technologies Risk mitigated by adopting a single platform to efficiently support changing traffic patterns without equipment obsolescence
- 33. 33 Thank you! 33 For moreinformation please visit: www.advantechwireless.com