TCP Performance for Vehicular Users Through Satellite Links

In this paper the reference system is given by wireless users aboard of fast moving vehicles, such as trains, connected to the Internet by means of satellite links. Performance of several TCP flavors are investigated in this scenario using a Performance Enhancing Proxy architecture. TCP performance are reported also in presence of UDP flows and some enhancements, such as large initial window and window scale, and are evaluated in terms of throughput and fairness. Results show that TCP Vegas is the best performing when large initial window and window scale options are implemented.