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SKY X TECHNOLOGY

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by

Kartik Sharma

on 15 March 2014

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Transcript of SKY X TECHNOLOGY

Sky X System
Sky X products increase the performance of IP over satellite by of protocol splitting the TCP connection.

The Sky X 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.


SKY X TECHNOLOGY

Sinhgad College of EngineeringDepartment of Information Technology

Contents
PERFORMANCE OF TCP OVER SATELLITE

Window size – Sliding window mechanism, Max up to 64KB

Data Acknowledgments - Latency problem , asymmetric bandwidth ,algorithm does not respond well over satellite N/W

Congestion Avoidance – misinterprets long round trip time and bit error as congestion ,use congestion avoidance mech
INTRODUCTION
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.

The Sky X systems replaces TCP over satellite link with a protocol optimized for the long latency, high loss and asymmetric 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 Client and the Sky X Server enhance the performance of data transmissions over satellites directly to end user PC’s, thereby  increasing Web performance by 3 times or more and file transfer speeds by  10 to 100 times.

SKY X TECHNOLOGY
Seminar Presentation
On

Roll No - 307108

Exam No - T80238545

Name - Dhokane Devendra B.

Guide
Prof. G.R. Pathak

Date – 19/3/2014


Introduction
Performance of TCP over satellite
Sky X system
Sky X protocol Design
Conclusion
References

The Sky X gateway splits the single TCP connection into three separate components.

A TCP connection on the remote side between the client and Sky X gateway, an XTP connection involving Sky X protocol over the satellite between the two Sky X gateways and a TCP connection between the opposite Sky X gateway and server.

XTP is a reliable, transport-layer protocol specifically designed to operate efficiently over high-speed networks and offers a level of performance not possible with TCP on long latency, high loss satellite links.

XTP
WORKING
The two Sky X gateways pass control data between each other, allowing the Sky X gateway on the opposite side of the satellite to appear to be the original source or destination device. This architecture maintains full TCP reliability and end-to-end flow control.

SKY X PROTOCOL DESIGN
Effective Acknowledgment Algorithm - Effective Selective retransmission algorithm , data loss due to corruption , infrequent acknowledgment , reduce back channel usage by 75%

Dynamic Window Sizing – link bandwidth, delay , no. of simultaneous connection

Rate Control

Web prefetch
SKY X PROTOCOL DESIGN
Data compression – up to 5:1

Sky X Multicast fan-Out – TCP unicast connection into multicast transfer

ADVANTAGES
1. Increased Performance

2. Usage maximum bandwidth

3.Easy Installation

4.High Performance



CONCLUSION
The sky X gateway is the leading solution for overcoming the limitations of TCP/IP over satellite. ISP’s, corporations, governments, and military organizations around the world rely on sky X gateway to enhance the performance of their satellite networks.
 
Testing by independent third parties including INTELSAT and NASA confirms that the sky X Gateway dramatically improves performance for the internet and private access over satellite networks.
 
The world is reducing to a global village by the use of satellite communication and so the improvement in the rate of information interchange through satellite is a must and thus sky X technology becomes unavoidable.
REFERENCES
BOOKS
 

- A Top Down Approach Featuring The Internet,
Addison Wesley by JF&Ross KW.
- TCP/IP Protocol Suite, by Forouzan B.
- Computer Networks A.Tanenbaum
 
WEBSITES
 
www.mentat.com
www.skyx.com


THANK YOU
Full transcript