Chapter 5 • Bandwidth management
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An important element in the inbound allocation scheme is that
bandwidth need not be dedicated (that is, assigned to a specific
satellite router or group of satellite routers) but can instead be
guaranteed
. The advantage of guaranteeing bandwidth is that
when an IQoS plan does not fully utilize its assigned bandwidth,
the HX System is free to reallocate this bandwidth to other IQoS
plans (allowing over subscription of bandwidth), providing
flexibility to an operator.
Dynamic stream services
When a satellite router is configured for dynamic stream services,
the amount of bandwidth it receives is based on a combination of
the following factors:
•
Backlog amount – This is the satellite router’s estimation of
how much bandwidth it needs at any given amount.
•
Available IQoS capacity – This is the amount of available
network capacity the system is using to allocate the dynamic
stream capacity for this IQoS plan.
The IQoS plan defines the maximum amount of bandwidth
available to a group of satellite routers as they access the dynamic
stream bandwidth. The HX System supports multiple IQoS plans,
allowing operators to provide different levels of best-effort
services to different groups of customers.
Figure 6: Inbound pooling
Summary of Contents for HX System
Page 1: ...1037852 0001 Revision A September 4 2008 HX System System Overview Release 1 2 7 ...
Page 8: ... Contents viii 1037852 0001 Revision A ...
Page 10: ... Figures x 1037852 0001 Revision A ...
Page 12: ... Tables xii 1037852 0001 Revision A ...
Page 24: ...Chapter 1 Overview 12 1037852 0001 Revision A ...
Page 26: ...Chapter 2 Subsystems 14 1037852 0001 Revision A Figure 3 HX Subsystems and LAN Connections ...
Page 50: ...Chapter 4 Network security 38 1037852 0001 Revision A ...
Page 62: ...Chapter 5 Bandwidth management 50 1037852 0001 Revision A ...
Page 70: ...Chapter 6 IP features 58 1037852 0001 Revision A ...
Page 80: ...Chapter 8 Transmission features 68 1037852 0001 Revision A ...
Page 88: ...Chapter 10 HX options 76 1037852 0001 Revision A ...
Page 96: ...Appendix B Transportable Gateway TGW 84 1037852 0001 Revision A ...
Page 100: ... Acronyms and abbreviations 88 1037852 0001 Revision A ...
Page 106: ... Index 94 1037852 0001 Revision A ...