Hughes HX System, Обзор системы

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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