An E2E Mobility Management and TCP Flow Control Scheme in Vertical Handover Environments 


Vol. 30,  No. 6, pp. 387-395, Jun.  2005


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  Abstract

In this paper, we propose an end-to-end mobility management and TCP flow control scheme which considers different link characteristics for vertical handover environments. The end-to-end mobility management is performed by using SIP protocol. When a mobile node moves to a new network, it informs its movement of the correspondent node by sending SIP INFO message containing a new IP address which will be used in the new network. And then the corresponding node encapsulates all packets with the new IP address and sends them to the mobile node. In general, RTT of WLAN is shorter than RTT of cdma2000. When the MN moves from WLAN network to cdma2000 network, TCP retransmission timeout will be occurred in spite of non congestion situations. Thus, TCP congestion window size will be decreased and TCP throughput will be also decreased. To prevent this phenomenon, we propose a method using probe packets after handover to estimate a link delay of the new network. We also propose a method using bandwidth ratio of each netw k to update RTT. It is shown through NS-2 simulations that the proposed schemes can have better performance than the previous works.

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  Cite this article

[IEEE Style]

K. Seo and J. Lim, "An E2E Mobility Management and TCP Flow Control Scheme in Vertical Handover Environments," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 6, pp. 387-395, 2005. DOI: .

[ACM Style]

Ki-nam Seo and Jae-Sung Lim. 2005. An E2E Mobility Management and TCP Flow Control Scheme in Vertical Handover Environments. The Journal of Korean Institute of Communications and Information Sciences, 30, 6, (2005), 387-395. DOI: .

[KICS Style]

Ki-nam Seo and Jae-Sung Lim, "An E2E Mobility Management and TCP Flow Control Scheme in Vertical Handover Environments," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 6, pp. 387-395, 6. 2005.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880