presentation: managed services and satellite: applications
TRANSCRIPT
© 2007 CapRock Communications, Inc. – All Rights ReservedVer. 01.09.06
World-Class Communications Anywhere in the WorldTM
Managed Services and Satellite: Applications for TDMA and SCPC
© Copyright 2004 CapRock Communications – All Rights ReservedVer. 06.10.05 © 2007 CapRock Communications, Inc. – All Rights Reserved
VSAT Access TechnologyVSAT Access Technology
World-Class Communications Anywhere in the World TM
3© 2007 CapRock Communications, Inc. – All Rights Reserved
VSAT Access Technology ExamplesVSAT Access Technology Examples
• SCPC (Single Channel Per Carrier)
• TDM/SCPC Return (Time Division Multiplex) – Asymmetrical SCPC
• TDM/TDMA Return (Time Division Multiple Access)
4© 2007 CapRock Communications, Inc. – All Rights Reserved
Shared DedicatedSemi-Dedicated
Technologies Fit Different Usage ProfilesTechnologies Fit Different Usage ProfilesP
rice
of
Ser
vice
Bandwidth Utilization
TDMA
SCPC Asymmetric Cloud
SCPC Dedicated Link
$$$
$
$$
• Single user sites
• Limited # phone lines
• Basic broadband access
• Infrequent use
• Call centers
• Streaming content
• Real-time video
• Continuous use
5© 2007 CapRock Communications, Inc. – All Rights Reserved
Single Channel Per Carrier (SCPC)Single Channel Per Carrier (SCPC)
Cust. A
Cust. B
TX
Cust.D
D
C
B
A
Satellite Transponder
IPXpress
RXTXRXRX TXRX TX
Cust.CAdvantages
•Simple•Easy to Troubleshoot •Minimal Equipment Required•Maximum Bandwidth Availability
Advantages•Simple•Easy to Troubleshoot •Minimal Equipment Required•Maximum Bandwidth Availability
Disadvantages•Hard to manage centrally•High Maintenance•Bandwidth Inefficient•Extremely Inflexible
Disadvantages•Hard to manage centrally•High Maintenance•Bandwidth Inefficient•Extremely Inflexible
• Each Carrier Pair Dedicated to a Customer• No Sharing of Bandwidth between Carriers• Each Carrier Pair Dedicated to a Customer• No Sharing of Bandwidth between Carriers
In traffic graph, carrier would need to match peak, which is around 150 kb/s, in both directions.In traffic graph, carrier would need to match peak, which is around 150 kb/s, in both directions.
6© 2007 CapRock Communications, Inc. – All Rights Reserved
TDM/SCPCTDM/SCPC
C
Cust. A
Cust. B
Cust.D
A
B
D
Satellite Transponder
IPXpress
RXRXRXRX
Cust.C
TX
A
B
C
D
A
BC
D
A
BC
D
1
A
B
C
D
1
A
B
C
D
1
AB
CD
1
A
B
C
D
• Shared outbound corresponds to the highest data rate direction
• Since shared, actual utilization tends to flatten out…
• Shared outbound corresponds to the highest data rate direction
• Since shared, actual utilization tends to flatten out…
•Outbound TX from HUB is shared among all remotes.•Each remote has individual carrier to return data (SCPC)•Outbound TX from HUB is shared among all remotes.•Each remote has individual carrier to return data (SCPC)
Advantages• Bandwidth efficient outbound• Flexible• Ability to burst• Dedicated return
Advantages• Bandwidth efficient outbound• Flexible• Ability to burst• Dedicated return
Disadvantages• Inefficient return• More complex than SCPC• No reduction in eq. cost.
Disadvantages• Inefficient return• More complex than SCPC• No reduction in eq. cost.
7© 2007 CapRock Communications, Inc. – All Rights Reserved
TDM/TDMA ReturnTDM/TDMA Return
C
Cust. A
Cust. B
Cust.D
A
B
D
Satellite Transponder
Linkstar HubIPXpress
RXRX
Cust.C
TX
A
B
C
D
A
BC
D
A
BC
D
1
A
B
C
D
1
A
B
C
D
1
AB
CD
1
A
B
C
D
A
B
A
B
C
D
C
D
B
C
D
A
• Outbound and Inbound are shared.• Remotes are shared amongst assigned return carriers.• Since shared, actual utilization tends to flatten out for both Outbound and Inbound.
• Outbound and Inbound are shared.• Remotes are shared amongst assigned return carriers.• Since shared, actual utilization tends to flatten out for both Outbound and Inbound.
Advantages• Bandwidth efficient• Flexible• Bursting, QoS, VPNs w/ TCP Acceleration, CIR/Burst Dedicated return• Centralized management
Advantages• Bandwidth efficient• Flexible• Bursting, QoS, VPNs w/ TCP Acceleration, CIR/Burst Dedicated return• Centralized management
Disadvantages•ComplexityDisadvantages•Complexity
8© 2007 CapRock Communications, Inc. – All Rights Reserved
TDM/TDMA Return Channel FrameTDM/TDMA Return Channel Frame
C
Cust. A
Cust. B
Cust.D
A
B
D
TDMA FrameApprox. every 45 msec
IPXpress
Cust.C
TX
A
B
C
D
D B
C
D
A
A43 kb/s
CD
34.4 kb/sB
25.8 kb/sTIME
Burst Slots (8.6 kb/s)
A BC D
A
B
CAssigned Burst Time
Slots 1 - 5
Assigned Burst Time Slot 7
Assigned Burst Time Slot 12-14
Assigned Burst Time Slot 21-24
1 5 7 12 14 21 24
9© 2007 CapRock Communications, Inc. – All Rights Reserved
SummarySummary
Service Type
CapacityFlexibility Platform Best Fit Traffic/Application
CircuitFixed
(days/weeks/months)SCPC
- High throughput circuit services - Dedicated services - Static capacity - Streaming video
Packet Variable TDM/TDMA
- Bursty IP traffic - Moderate real-time traffic (VoIP) - Content distribution - Keystroke interactive, point-of-sale, SCADA
10© 2007 CapRock Communications, Inc. – All Rights Reserved
© 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.