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An Enhanced TCP Vegas Algorithm Based on Route
Surveillance and Bandwidth Estimation over GEO Satellite
Networks
Abstract
TCP Vegas is usually used in Space Communication Protocol Standard-Transport Protocol(SCPS-TP) and
satellite networks due to its larger performance gain such as throughput, network utilization, stability,
and packet-loss rate. However, the performance of TCP Vegas is inefficient in GEO satellite networks.
The burst during slow-start phase causes Vegas to change from slow-start phase to congestion
avoidance phase too early, and it also has disadvantage that can not distinguish link changing and
congestion. In this paper, TCP Vegas-W is presented based on route surveillance and bandwidth
estimation, and with surveillance of bandwidth and Round-Trip Time (RTT), congestion level is estimated
much more correctly and precisely. Simulation results show that Vegas-W algorithm can get much
better performance in GEO satellite networks.
Existing system
TCP Vegas is usually used in Space Communication Protocol Standard-Transport Protocol(SCPS-TP) and
satellite networks due to its larger performance gain such as throughput, network utilization, stability,
and packet-loss rate. However, the performance of TCP Vegas is inefficient in GEO satellite networks.
The burst during slow-start phase causes Vegas to change from slow-start phase to congestion
avoidance phase too early, and it also has disadvantage that can not distinguish link changing and
congestion.

2. Proposed system
TCP Vegas-W is presented based on route surveillance and bandwidth estimation, and with surveillance
of bandwidth and Round-Trip Time (RTT), congestion level is estimated much more correctly and
precisely. Simulation results show that Vegas-W algorithm can get much better performance in GEO
satellite networks.
SYSTEM CONFIGURATION:-
HARDWARE CONFIGURATION:-
 Processor - Pentium –IV
 Speed - 1.1 Ghz
 RAM - 256 MB(min)
 Hard Disk - 20 GB
 Key Board - Standard Windows Keyboard
 Mouse - Two or Three Button Mouse
 Monitor - SVGA
SOFTWARE CONFIGURATION:-
 Operating System : Windows XP
 Programming Language : JAVA
 Java Version : JDK 1.6 & above.