Title :
A flow control scheme for improving TCP throughput and fairness for wireless networks
Author :
Jang, Hee-Jin ; Suh, Young-Joo
Author_Institution :
Dept. of Comput. Sci. & Eng., Pohang Sci. & Technol. Univ., South Korea
Abstract :
Most of recent research results on TCP performance in wireless networks have a limitation that they assume a single TCP connection. When multiple TCP connections are concentrated in a base station (BS), it is liable to be a bottleneck and the difference of network bandwidth between wired and wireless links aggravates the situation. The BS experiences frequent congestions and eventually lead to performance degradation. Furthermore, it is difficult to guarantee fairness among multiple TCP connections. To meet both of the challenges, we propose a flow control scheme called feedback-based snoop (F-Snoop). F-Snoop provides the TCP sender with BS buffer state information via TCP ACKs explicitly in real time so that the TCP sender can increase its transmission window size to fill the network pipe, while regulating packet transmission rate to avoid buffer overflow at the BS. The performance is evaluated by simulation using ns-2 and the results show that the F-Snoop not only achieves improvement in throughput but also fairly allocates the available wireless bandwidth to all TCP connections.
Keywords :
mobile radio; packet radio networks; radio links; telecommunication congestion control; transport protocols; F-Snoop; TCP fairness improvement; TCP throughput improvement; base station; buffer overflow; buffer state information; feedback-based snoop; flow control scheme; multiple TCP connection; network bandwidth differences; network pipe; packet transmission rate; single TCP connection; transmission window size; transport control protocol; wireless network; Bandwidth; Base stations; Bit error rate; Buffer overflow; Computer science; Degradation; Mobile communication; TCPIP; Throughput; Wireless networks;
Conference_Titel :
Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-7700-1
DOI :
10.1109/WCNC.2003.1200508