The document discusses the Sky-X technology, which replaces TCP with the Xpress Transport Protocol (XTP) for satellite communication. The Sky-X gateway intercepts TCP connections and converts data to XTP for transmission over the satellite link, then back to TCP. This improves performance over satellite links by optimizing for high loss environments compared to TCP. The Sky-X system allows networks to take full advantage of satellite bandwidth and provides fast, reliable data transfer and multicast file transfers without requiring client/server modifications.

1. DEPARTMENT OF COMPUTER
ENGINEERING AND INFORMATION
TECHNOLOGY

2. 2
SEMIENAR
ON
SKY-X TECHNOLOGY
SUBMITTED BY:-
MISS.ALFIYA FATEMA
MR.TAPESH CHALISGAONKAR

3. Content:
Introduction
Working Details
Application
Merits
Future enhancement
Conclusion
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4. Introduction :
 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
communication.
 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

5. WORKING :
 Sky X Technology Overcome TCP Performance
Limitations.
 Even though the TCP is very effective in the local network
connected by using cables or optical fibers by using its
many features
 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

6.  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.
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7. 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.
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8. Characteristics of XTP :
 Error control
 flow Control
 Prioritization Issues
 Multicast mode
 Selective Retransmission
 Multi-packet handshaking
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9. 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.
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10. 10

11. Application :
 Used for Satellite communication.
 Used for accessing web in fastest
speed.
 Used For data transfer, File Transfer
efficiently.
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12. Merits :
 Increases web performance 3 times
faster.
 Does not require any modifications to
end client and servers.
 Sky X Gateway provides fast, efficient,
fully reliable multicast file transfers.
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13. 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.
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14. Conclusion :
 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.
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15. Thank you!
?
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