Sky X Technology

[seminar class]

PRESENTED By-:
Prakash Upadhyay

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INTRODUCTION
• SKY- X Technology
• A Technology that use for remote access of internet through satellite.
• We can over come internet protocols restrictions by using the Sky X protocols.
• Sky X products are the leading implementation of a class of products
• known variously as protocol gateway TCP Performance Enhancing Proxy
• (TCP/PEP) , or satellite spoofer.
• PROTOCOLS
• TYPES OF PROTOCOL
• PROTOCOL SERVICES
• Importance Of Protocol:
• Why SKY-X ...?
• Architecture
• Sky-x Client
Sky-x Client Architecture
• Sky-X Server
• SKY-X Client Server
• CLIENT SERVER
• Sky-X Gateway
• Gateway System
• XTP- Connection
• XTP- Connection
• SKY - X Characteristic
CHARACTERISTIC
 File Transfers
-The following file transfer tests illustrate the benefit of Sky X performance enhancement for different windows sizes, page link band-widths, round-trip times, and bit error rates. Users should expect similar results for any large, single connection data transfer. Each graph shows Sky X enhancement for three cases:
no compression, highly compressible text, and Corpus benchmark compressibility
 Window Size and Link Speed vs Throughput
A default window size of 8 KB limits TCP throughput to less than 100 Kbps over satellite. Even on server operating systems using a 32 KB window, TCP is only able to reach a through-put of 440 Kbps.
• Sky X gateway overcomes this limitation, taking full advantage of the available bandwidth .
• Regardless of the window size of the client or server. For compressible data, Sky X can provide throughput rates far greater than the page link bandwidth.
 Round-Trip Delay vs. Throughput
 The Sky X gateway system removes the dependency of TCP on the round-trip time of the link.
 These results illustrate that TCP throughput drops rapidly as the round-trip time increases.
 In contrast, Sky X is able to maintain full usage of the page link regardless of the round-trip time.
 For compressible text, Sky X consistently delivers throughput rates greater than the actual bandwidth.
 Bit Error Rate vs. Throughput
 The Sky X system overcomes the high sensitivity of TCP to the bit error rate of the link.
 The throughput as a function of the bit error rate for a 10 Mbps satellite page link using a 1 MB TCP window.
 Even at low error rates, TCP is able to deliver only 1.5 Mbps, while at an error rate of 110-5, TCP's throughput drops to less than 0.03 Mbps.
 Sky X fully saturates the page link at low error rates and even at an error rate of 110-5, achieves 5.1 Mbps without compression and up to 15.8 Mbps for compressible data.
 Web Performance
 Unlike file transfers which typically consist of a single, large download, Web traffic is characterized by large numbers of short connections.
 Fast Start feature specically optimizes Web performance by reducing time required to establish new connection.
 The average response time for a mixture of 50 simultaneous web connections using the sky X gateway is between 0.7 and 1.1 seconds depending on the compressibility of the data, compared to 3.0 seconds with TCP.
Future Scope
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.
 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.