Presented By Manoj Datt

From IT 3rd Year

Content

Introduction.

Why Sky X Technology ?.

Performance of TCP over satellite.

Sky X Gateway.

Comparison B/W TCP and Sky X Advantage of XTP.

Application.

Merits.

Conclusion.

Introduction:

Satellite is an option for carrying Internet and other IP traffic to many location across the globe.

The Sky X technology has replaced TCP over satellite link with protocol optimized.

Adding Sky X system to the satellite network ,allows user to take full advantages of the available bandwidth.

Conti.To Introduction

The Sky X increases the web performance by 3 times or more and file transfer speeds by 10 to 100 times.

The Sky X solution is entirely transparent to end user.

The Sky X family consists of Sky X Gateway, Sky X Client and Sky X Server and the Sky X OEM products.

Why Sky X technology?

Satellites are ideal for providing Internet and

private network access over a long distance and

to remote location.

Performance of TCP over satellite

Communication over geosynchronous satellites, orbiting at an altitude of 22,300 miles has round trip times of approximately 540 m/s.

The journey through the atmosphere can introduce bit errors into the data stream.

These factors, combined with backchannel bandwidth typically much smaller than that available on the forward channel, reduce the effectiveness of TCP which is optimized for short hops over low-loss cables or fiber.

Continue.

TCP is designed for efficiency and high performance ,and optimized for maximum throughput and the highest transaction speeds in local networks.

The satellite conditions adversely interact with a number of elements of the TCP architecture.

Including:

window sizing,

congestion avoidance algorithms, and

data acknowledgment mechanisms.

Sky X Gateway

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 which is the protocol optimized for satellite conditions.

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.

Continue..

This architecture is also referred to as (TCP-PEP).

Continue..

XTP is transport layer protocol design to operate over

high speed network and provides high level performance

to the End-Users.

Comparison B/W TCP and Sky X

Factor TCP Sky X

Speed(for an 8 Mbps satellite

having 50 simultaneous

connections)

3.0 sec 0.7-1.1 sec

Bandwidth(for 10mbps satellite )

1.5 mbps 5.8 mbps at

uncompressed data

15.1mbps at

Compressed data

Advantage of XTP

XTP provides all the functionality of TCP and UDP.

XTP supports a reliable transport multicast capability.

XTP's design scales from LANs to MANs to WANs without alteration .

The XTP protocol also supports the TCP congestion avoidance algorithm to keep the terrestrial network stable and protected.

Application

Used for Satellite communication.

Used to access web in faster speed.

Used to enhanced the data transfer and file

transfer speed.

Provide better reliability.

Merits

Increase Web performance 3 time faster.

Does not requires any modification to end

client and server.

Sky X Gateway provides fast ,efficient, fully

reliable multicast file transfers.

Conclusion.

Sky X technology is best suited for Satellite

communication using XTP and Sky x Gateway.

Sky X system of satellite network allows user

to take full advantage of available bandwidth.

It gives all features required for successful data

transmission.