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the performance of an individual tcp flow with a vertical handoff has been studied in several...in this paper we study the behaviour of multiple competing tcp flows with a vertical handoff. as a part of this study we evaluate the...
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...vertical handoffs between different wireless technolo- gies usually lead to dramatic changes in the link capac- ity. a successful qos solution for vertical handoffs must be able to fast track the capacity changes and agilely adapt the delivery rates and qualities of the ongoing applica- tions. though traditional...
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...paper we propose and investigate the use of a vertical handoff support node (vhsn), which is attached locally to the wired lan hotspot infrastructure. unlike...end station. when abrupt loss of wlan coverage occurs, the vhsn quickly intercepts and redirects the media flow through the local cellular basestation using its...
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...unreliable networks.
in practice, most tcp deployments have been carefully designed in the context of wired networks. ignoring the properties of
wireless ad-hoc networks can...be applied. this work shows the performance of tcp with adaptive pacing (tcp-ap) and link
random early...
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...could be a challenge because of drastic changes among overlaid networks. in the paper, design considerations and vertical handoff schemes are suggested: network-node assisted vertical handoff and neighbor-node assisted vertical handoff. by adopting cross-layer approach...
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...with mathematical analysis, we compare the link utilization of newreno tcp, scalable tcp, and bic tcp. among
them, the performance of bic tcp shows best, and it gets...larger with longer rtt. bic tcp shows the best performance to the downward vertical handoff among the
three tcps. that is because bic tcp...
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...or even completely avoid upward vertical handoffs. we implement the safetynet protocol and compare its performance with
the fmipv6 protocol in our wireless...protocol can provide an improvement of up to 95% for tcp performance in vertical handoffs, when compared with fmipv6
and an improvement of...
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...restricted to a small number of geographical areas because of limited physical overage of wireless lan. on the other hand, despite their lower...mobile ip implementation. we discuss the design issues in the proposed vertical handoff system, including connection setup problems due to network address translation, and the disparity in link characteristics between...
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...vertical handoff enables the cross-domain mobility in wireless networks. algorithms are crucial to achieve an optimal handoff management in terms of performance and quality of service. this paper reviews the existing algorithms for vertical handoff management, and concentrates on the...
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...we study the problem of handoffs in heterogeneous (both wired and wireless) networks. we first present a testbed that integrates multiple network technologies (ethernet lan, wifi...propose a model to analyze the performance of vertical handoffs as well as experimental measures to validate the model. finally, we discuss the advantages of handoff detection and triggering through link...