|
For Full-Text PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
|
TCP-STAR: TCP Congestion Control Method for Satellite Internet
Hiroyasu OBATA Kenji ISHIDA Satoru TAKEUCHI Shouta HANASAKI
Publication
IEICE TRANSACTIONS on Communications
Vol.E89-B
No.6
pp.1766-1773 Publication Date: 2006/06/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.6.1766 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Network Keyword: TCP congestion control method, satellite Internet, throughput,
Full Text: PDF(404.4KB)>>
Summary:
Satellite Internet is one of the most important networks for emergency communications because of its tolerant of disasters such as earthquake. Therefore, satellite Internet has received considerable attention over recent years. However, most standard implementations of TCP congestion control method perform poorly in satellite Internet due to its high bit error rate and long propagation delay. This paper proposes a new TCP congestion control method called TCP-STAR to improve the throughput over satellite Internet. TCP-STAR has three new mechanisms, namely Congestion Window Setting (CWS) based on available bandwidth, Lift Window Control (LWC), and Acknowledgment Error Notification (AEN). CWS can resist the reduction of the transmission rate when data losses are caused by bit error. LWC is able to increase the congestion window quickly based on the estimated available bandwidth. AEN can avoid the reduction of the throughput by mis-retransmission of data. The mis-retransmission is caused by ack losses or delay. Simulations show that TCP-STAR can obtain the best throughput comparing with other TCP variants (TCP-J and TCP-WestwoodBR). Furthermore, we found that the fairness of TCP-STAR is a little lower than that of TCP-WestwoodBR. However, the fairness of TCP-STAR is equal to TCP-J.
|
|
|