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Presentation: Managed Services and Satellite: Applications ...

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  • 1. Managed Services and Satellite: Applications for TDMA and SCPC World-Class Communications Anywhere in the World TM Ver. 01.09.06 © 2007 CapRock Communications, Inc. – All Rights Reserved
  • 2. VSAT Access Technology World-Class Communications Anywhere in the World TM Ver. 06.10.05 © 2007 CapRock Communications, Inc. – – Rights Reserved © Copyright 2004 CapRock CommunicationsAllAll Rights Reserved
  • 3. VSAT Access Technology Examples • SCPC (Single Channel Per Carrier) • TDM/SCPC Return (Time Division Multiplex) – Asymmetrical SCPC • TDM/TDMA Return (Time Division Multiple Access) © 2007 CapRock Communications, Inc. – All Rights Reserved 3
  • 4. Technologies Fit Different Usage Profiles $$$ • Single user sites • Limited # phone lines • Basic broadband access SCPC • Infrequent use Dedicated Link Price of Service $$ SCPC Asymmetric Cloud • Call centers • Streaming content • Real-time video TDMA • Continuous use $ Shared Semi-Dedicated Dedicated Bandwidth Utilization © 2007 CapRock Communications, Inc. – All Rights Reserved 4
  • 5. Single Channel Per Carrier (SCPC) • Each Carrier Pair Dedicated to a Customer In traffic graph, carrier would need to match peak, • No Sharing of Bandwidth between Carriers which is around 150 kb/s, in both directions. Satellite Transponder RX TX RX TX RX TX RX TX D Cust. A C IPXpress Cust. B B Cust.C Advantages A Disadvantages •Simple •Hard to manage centrally •Easy to Troubleshoot •High Maintenance Cust.D •Minimal Equipment Required •Bandwidth Inefficient •Maximum Bandwidth Availability •Extremely Inflexible © 2007 CapRock Communications, Inc. – All Rights Reserved 5
  • 6. TDM/SCPC •Outbound TX from HUB is shared among all remotes. •Each remote has individual carrier to return data (SCPC) Satellite Transponder RX RX RX RX TX • Shared outbound corresponds to the highest D data rate direction C B 1 A • A Since shared, actual utilization tends to flatten D out… B C 1 D C B A C D A D B1 A Cust. A C A A B1 B B A B IPXpress C Cust. B C D C Advantages D Disadvantages Cust.C • Bandwidth efficient outbound • Inefficient return D • Flexible • More complex than SCPC Cust.D • Ability to burst • No reduction in eq. cost. • Dedicated return © 2007 CapRock Communications, Inc. – All Rights Reserved 6
  • 7. • Outbound and Inbound are shared. TDM/TDMA Return • Remotes are shared amongst assigned return carriers. • Since shared, actual utilization tends to flatten out for both Outbound and Satellite Transponder Inbound. RX RX TX D C B 1 A A A A C B D D B C 1 D C B A C D B A D B1 A Cust. A A C A A C B B1 B B D A C B IPXpress Linkstar Hub C Cust. B C D D Advantages Disadvantages C Cust.C • Bandwidth efficient D •Complexity • Flexible D • Bursting, QoS, VPNs w/ TCP Cust.D Acceleration, CIR/Burst Dedicated return • Centralized management © 2007 CapRock Communications, Inc. – All Rights Reserved 7
  • 8. TDM/TDMA Return Channel Frame Burst Slots (8.6 kb/s) TDMA Frame Approx. every 45 msec 1 5 7 12 14 21 24 A C B D TIME A B D C 43 kb/s 25.8 kb/s 34.4 kb/s TX Assigned Burst Time Slots 1 - 5 A Assigned Burst Time Slot 12-14 B Assigned Burst Time C Slot 7 A A Cust. A A B B D Assigned Burst Time Slot 21-24 B IPXpress C Cust. B C D C D Cust.C D Cust.D © 2007 CapRock Communications, Inc. – All Rights Reserved 8
  • 9. Summary Service Capacity Type Flexibility Platform Best Fit Traffic/Application - High throughput circuit services Fixed - Dedicated services Circuit SCPC (days/weeks/months) - Static capacity - Streaming video - Bursty IP traffic - Moderate real-time traffic (VoIP) Packet Variable TDM/TDMA - Content distribution - Keystroke interactive, point-of-sale, SCADA © 2007 CapRock Communications, Inc. – All Rights Reserved 9
  • 10. © 2007 CapRock Communications, Inc. All rights reserved. Product and service specifications are subject to change without notice. All information is believed to be accurate at the time of publication. CapRock Communications does not assume responsibility for errors that may appear in this document. This document is not an offer for sale of any product or service. Provision of services is conditioned upon execution of a service agreement. Other terms and conditions may apply. SeaAccess Communications, CapRock, CapRock Communications, IPxpress, Reliability to the Extreme, and World-Class Communications Anywhere in the WorldTM are trademarks of CapRock Communications, Inc. All other trademarks and service marks are the property of their respective owners. © 2007 CapRock Communications, Inc. – All Rights Reserved 10

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