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Topologies
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Star |
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The star-shaped network
comprises of N VSATs and a hub. Every VSAT can
transmit up to K carriers, corresponding to
connections between terminals attached to the VSAT
and the corresponding applications at the host
computer connected to the hub station.
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Mesh |
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The meshed network
comprises N VSATs. Every VSAT should be able to
establish a link to any other one across the
satellite. A first approach is to have every VSAT
transmitting as many carriers as there are other
VSATs: the information conveyed on every carrier
represents the traffic on a one-way connection from
one user terminal attached to one of the VSATs to
another user terminal attached to another VSAT.
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Hybrid |
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Hybrid or Star/Mesh solution combines the
centralized hub benefits of the star network
topology with the direct single-hop remote-to-remote
connection of the mesh network. In a star network
all remote terminals have direct connectivity with
the hub which is ideal for applications that
terminate into a common point such as the internet,
public telephone network, or corporate data
centers. In a mesh network, the remote terminals
are able to send IP packets directly to other remote
terminals based on the destination IP address. The
star/mesh remote stations use the star return
channel and forward channel for mesh control
messages. |
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