Yu-Chieh Lin
ABSTRACT
A vertical handoff occurs when a multi-homed mobile host roams from a network to another heterogeneous network. Nevertheless, the network before and after a vertical handoff usually have drastic different characteristics. In this paper, we proposed an end-to-end based Vertical-handoff Aware TCP, called VA-TCP, which promptly adapts TCP behavior during a vertical handoff. When entering a new network, on the basis of packet-pair algorithm, VA-TCP dynamically estimates the new network bandwidth and round-trip time by using out-of-band ICMP messages. After that, by the estimated bandwidth and round-trip time, VA-TCP adjusts the TCP parameters including congestion window size, slow-start threshold, retransmission timer and RTTs to respond to the new network environment. From the experimental result, the TCP throughput by the proposed VA-TCP scheme is around 2 times that by the original TCP.
- Chen Kai, et. al. Understanding Bandwidth-Delay Product in Mobile Ad Hoc Networks. Computer Communications, 27, pp. 923--934, 2004. Google Scholar
Digital Library
- Guo, C. X., et. al. A seamless and proactive end-to-end mobility solution for roaming across heterogeneous wireless networks. IEEE Journal on Selected Areas in Communications, 22(5), pp. 834--848. June, 2004. Google ScholarDigital Library
- Katz, R. H. and Brewer, E. A. The Case for Wireless Overlay Networks, in Proceedings of the SPIE Multimedia and Networking Conference, pp. 77--88, January, 1996.Google ScholarCross Ref
- Keshav, S. A Control-Theoretic Approach to Flow Control. in Proceeding of the ACM SIGCOMM. pp. 3--15, Sept. 1991. Google ScholarDigital Library
- Tian Y., Xu Kai, and Ansari N. TCP in Wireless Environments: Problems and Solutions. IEEE Radio Communication, 43(3), March 2005. Google ScholarDigital Library
Index Terms
- VA-TCP: a vertical handoff-aware TCP
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