Adapting TCP for Vertical Handoffs in Wireless Networks

Daniel, Laila; Kojo, Markku

doi:10.1109/lcn.2006.322084

Cited by 12 publications

(12 citation statements)

References 8 publications

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“…One of the ideas is to perform a makebefore-break hand-off [13], in which the connection to the old AP breaks after the connection to the new AP has been established to avoid losses. Another proposal is to make TCP aware of the path change due to a vertical hand-off.…”

Section: Mobility and Hand-offsmentioning

confidence: 99%

Transport over Heterogeneous Networks Using the RINA Architecture

Trouva

Grasa

Day

et al. 2011

Lecture Notes in Computer Science

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Abstract. The evolution of various wireless technologies has greatly increased the interest in heterogeneous networks, in which the mobile users can enjoy services while roaming between different networks. The current Internet architecture does not seem to cope with the modern networking trends and the growing application demands for performance, stability and efficiency, as the integration of different technologies faces many problems. In this paper, we focus on the issues raised when attempting to provide seamless mobility over a hybrid environment. We highlight the shortcomings of the current architecture, discuss some of the proposed solutions and try to identify the key choices that lead to failure. Finally, we introduce RINA (Recursive Inter-Network Architecture), a newly-proposed network architecture that achieves to integrate networks of different characteristics inherently and show a simple example that demonstrates this feature.

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Section: Mobility and Hand-offsmentioning

confidence: 99%

Transport over Heterogeneous Networks Using the RINA Architecture

Trouva

Grasa

Day

et al. 2011

Lecture Notes in Computer Science

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“…However can be unnecessary retransmissions with this scheme in the case of a makebefore-break handoff. Our proposal rxmt-immediate [7] is more conservative than retransmission trigger as it retransmits only if TCP sender is in RTO recovery. In a subsequent Internet-Draft [9] the authors propose to retransmit the first unacknowledged packet when a connectivity change indication arrives and TCP is already in timeout state.…”

Section: Related Workmentioning

confidence: 99%

“…The incRTO algorithm [7] keeps the RTO value at 3 seconds till all packets sent before handoff are ACKed. Even though this simple approach is very effective in avoiding spurious RTOs, the high RTO value can delay the RTO recovery in some break-before-make scenarios where TCP will not be in RTO recovery when handoff notification arrives.…”

Section: B Tcp Enhancements To Avoid Spurious Rtosmentioning

confidence: 99%

“…The senderbased algorithms [4], [7]- [9] assume that the sender gets an explicit notification that the handoff has occurred and enhancements to the TCP sender algorithm are proposed. The receiver-based algorithms modify the TCP receiver algorithm when the notification regarding the handoff arrives.…”

Section: Introductionmentioning

confidence: 99%

“…Earlier we proposed enhancements to the TCP sender algorithm to mitigate the problems of vertical handoff between WLAN and GPRS accesses [7]. In this paper we make the following contributions: (i) we deliver explicit link delay and bandwidth information to the TCP sender and by taking advantage of this information we develop further our crosslayer enhanced TCP algorithms to cover a wider set of changes in the access link characteristics, and (ii) we present a thorough study of TCP performance with vertical handoff between access networks having a wide range of link bandwidth and delay and compare the performance of TCP enhanced by our algorithms with the regular TCP performance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Using cross-layer information to improve TCP performance with vertical handoffs

Daniel

Kojo

2007

2007 Second International Conference on Access Networks &Amp; Workshops

Self Cite

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In this paper we study the performance of TCP with a vertical handoff between access networks with widely varying link characteristics. TCP being an end-to-end protocol has performance problems as its behaviour depends on the endto-end path characteristics which are likely to be affected by a vertical handoff. We propose a set of enhancements to the TCP sender algorithm that leverage on explicit cross-layer information regarding the change in the access link delay and bandwidth. We apply our enhanced algorithms and carry out a systematic study comparing the performance of the regular TCP to the performance of the enhanced TCP algorithms in various handoff scenarios between access networks having widely different bandwidth and delay characteristics. Our experiments show that with cross-layer notifications TCP performance can be improved significantly in most vertical handoff scenarios.

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A handover-aware seamless video streaming scheme in heterogeneous wireless networks

Chung

2013

Ann. Telecommun.

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Adapting TCP for Vertical Handoffs in Wireless Networks

Cited by 12 publications

References 8 publications

Transport over Heterogeneous Networks Using the RINA Architecture

Transport over Heterogeneous Networks Using the RINA Architecture

Using cross-layer information to improve TCP performance with vertical handoffs

A handover-aware seamless video streaming scheme in heterogeneous wireless networks

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