Satellites are an attractive option for carrying Internet
and other IP traffic to many locations across the globe
where terrestrial options are limited .
The Sky X technology replaces TCP over satellite link
with a protocol optimized for the high loss and
bandwidth conditions of the typical satellite
Adding the Sky X system to a satellite network allows
users to take full advantage of the available bandwidth
The Sky X technology transparently enhances the
performance of all users on a satellite network . 4
Sky X Technology Overcome TCP Performance
Even though the TCP is very effective in the local network
connected by using cables or optical fibers by using its
Thus the advantages achieved by TCP in LAN's are no
longer effective in the satellite link.
So it is desirable to design a separate protocol for communication
through the satellite to eliminate the disadvantages of using TCP
over the sat 5
The Sky X gateway works by transparently replacing
TCP connections from the client and converting the
data to Xpress Transport protocol (XTP) for the hop
over the satellite link .
The sky X client/server system enhances the
performance of the internet and private network
access over satellite links.
XTP Protocol :
Xpress Transport Protocol (XTP) is a transport
layer protocol for high-speed networks promoted by
the XTP Forum developed to replace TCP.
XTP provides protocol options for error control, flow
control, and multicast mode.
Instead of separate protocols for each type of
communication, XTP controls packet exchange
patterns to produce different models.
Characteristics of XTP :
Sky X-Gateway :
The Sky X gateway works by intercepting the TCP
connection from the client and converting the data to the
XTP for transmission over the satellite.
The Sky X gateway on the opposite side of the satellite
link translates the data back to TCP for communication
with the server.
No changes are required to the client or server and all
applications continue to function without modification.
Used for Satellite communication.
Used for accessing web in fastest
Used For data transfer, File Transfer
Increases web performance 3 times
Does not require any modifications to
end client and servers.
Sky X Gateway provides fast, efficient,
fully reliable multicast file transfers.
Future Enhancement :
A product called XipLink which is under
developing will replace the sky X.
It is very much the same as the Sky X
with extra capabilities.
It optimize all TCP/IP traffic, basically
the link itself.
Thus Sky -x technology is best suited
for satellite communication using XTP
protocol and Sky x gateway.
The Sky X system of a satellite network
allows users to take full advantage of
the available bandwidth
It gives all features required for
successful data Transmission.