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2. ⚫ INTRODUCTION
⚫ WHYSKY X- TECHNOLOGY?
⚫ WORKING DETAILS
⚫ CHARACTERISTICS OF XTP
⚫ SKY X GATEWAY
⚫ APPLICATION
⚫ MERITS
⚫ DEMERITS
⚫ CONCLUSION
⚫ REFERENCE

3.  Satellites are ideal for providing internet
and private network access over long
distance and to remote locations.
 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. However the internet protocols are not
optimized for satellite conditions and
consequently the throughput over the
satellite networks is restricted to only a
fraction of available bandwidth.
 Thus We need sky x technology to over
come these restrictions and to access
maximum bandwidth.
Sky X product increase the performance of
IP over satellite through a combination of
protocol connection splitting data
compression and web prefetching.

6.  Sky X products increase the performance of
IP over satellite through a combination of
protocol connection-splitting, data
compression.
 So it is desirable to design a separate
protocol for communication through the
satellite to eliminate the disadvantages of
using TCP.
 Thus the advantages achieved by TCP in
LAN's are no longer effective in the satellite
link.

7.  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.
 But the satellite conditions adversely interact with a number of
elements of the TCP architecture, including it’s window sizing,
congestion avoidance algorithms, and data acknowledgment
mechanisms, which contribute to severely constrict the data
throughput that can be achieved over satellite links.

8. ⚫ 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.

9. ⚫ 1> Error control
⚫ 2> flow Control
⚫ 3>Byte ordering
⚫ 5>Multicast mode
⚫ 6>Selective Retransmission
⚫ 7>Multi-packet handshaking

10. 🢝 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.
🢝 This architecture offers vastly improved performance while remaining
entirely transparent to the end user and fully compactable with the
internet infrastructure.
🢝 No changes are required to the client or server and all applications
continue to function without modification.

12.  The Sky-X Gateway XR10 is well suited to networks with high
latency, high bit error and asymmetric links.
 Designed as an remote device, it performs best at maximum
bandwidth with a single, very large FTP and supports an industry-
best number of simultaneous sessions and connection turnover
rate.

13.  The Sky X Client / Server increases the
throughput and efficiency of network
access over satellites by transparently
replacing TCP with the Xpress
Transport Protocol (XTP) for the
satellite segment of the connection.
 The sky X client/server system
enhances the performance of the
internet and private network access
over satellite links.

14.  The sky X client software installed on the PC’s of the end user, works in
conjunction with a sky X server hardware unit located at the network hub.
 The Sky X client/server system overcomes the deficiencies of TCP/IP in
satellite –based networks while remaining entirely transparent to end-user
applications. The sky X client is ideal for use with any satellite receiver card
or set –top box.

15.  Used for Satellite communication.
 Used for accessing web in fastest speed.
 Used For data transfer, File Transfer efficiently.

16.  1> Increases web performance 3 times faster.
 2> Does not require any modifications to end client and
servers.
 3>Sky X Gateway provides fast, efficient, fully reliable
multicast file transfers.

17.  Thus Sky -x technology is best suited for 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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