Effect of vertical handovers on performance of TCP-friendly rate control

Gurtov, Andrei; Korhonen, Jouni

doi:10.1145/1031483.1031494

Cited by 74 publications

(34 citation statements)

References 42 publications

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“…However, TFRC will struggle when network conditions vary rapidly such as when vertical handovers occur, as seen in [35] and [36]. It has also been reported [37], [38] that TFRC may fail to mirror Reno's throughput if certain conditions are observed.…”

Section: Tcp-friendly Rate Control (Tfrc)mentioning

confidence: 98%

Explicit Congestion Control Algorithms for Time Varying Capacity Media

Abrantes

Araújo²,

Ricardo

2011

IEEE Trans. on Mobile Comput.

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One of the main drivers for Internet stability is the congestion control function embedded in the Transport Control Protocol (TCP) [1]. This function controls the bitrate of TCP connections and has been introduced by Van Jacobson in 1988 [2], after reports of congestion collapse emerged [3]. Since then it has helped the Internet through the years of its exponential growth with remarkable success. But this is coming to an end. The ever increasing bandwidth delay product of networks, and the latency and smoothness re-

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Section: Tcp-friendly Rate Control (Tfrc)mentioning

confidence: 98%

Explicit Congestion Control Algorithms for Time Varying Capacity Media

Abrantes

Araújo²,

Ricardo

2011

IEEE Trans. on Mobile Comput.

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“…However, current mobility management mechanisms make it impossible for the higher layer protocols to take timely corrective actions to cope with the abrupt change. This has led to the introduction of cross-layer enhanced versions, for instance, for TCP [85] and TFRC [86] to improve their performance under vertical handovers. Additionally, the handover decision-making of MIP remains unaware of the requirements of the applications as well as the capabilities of the available ANs without the support for cross-layer signaling.…”

Section: The Purpose Of Cross-layer Information In the Thesismentioning

confidence: 99%

Cross-layer optimized video streaming in heterogeneous wireless networks

Ojanperä¹

2013

SIGMultimedia Rec.

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This dissertation studies the impact of heterogeneous wireless networks on the design and implementation of mobile video streaming services. The aim is to enable Quality of Service (QoS) sensitive video streaming services to take full advantage of the access diversity of heterogeneous networks in order to optimize their operation in terms of quality and efficiency of network resource usage. This nevertheless requires support beyond the layered communication architecture of today's Internet.The thesis proposes an architecture for end-to-end cross-layer signaling and control for video streaming systems. The architecture supports extensive context information transfer in heterogeneous networks; thus, enabling the efficient management of video stream adaptation and user terminal mobility in a diverse and dynamic network environment. This thesis also studies and proposes cross-layer enhancements for adaptive video streaming and mobility management functions enabled by the cross-layer architecture. These include cross-layer video adaptation, congestion-triggered handovers, and concurrent utilization of multiple access networks in the video stream transport. For the video adaptation and multipath transmission, the flexible adaptation and transmission capabilities of the novel scalable video coding technology are used. Regarding the mobility management, the proposed solutions essentially enhance the handover decision-making of the Mobile IP protocol to better support QoS-sensitive video streaming. Finally, the thesis takes a holistic view on the application adaptation and mobility management, and proposes a solution for coordinated control of these two operations in order to achieve end-toend optimization.The resulting mobile video streaming system architecture and the cross-layer control algorithms are evaluated using network simulations and real prototypes. Based on the results, the proposed mechanisms can be seen to be viable solutions for improving video streaming performance in heterogeneous wireless networks. They require changes in the communication end-points and the access network but support gradual deployment. This allows service providers and operators to select only a subset of the proposed mechanisms for implementation. The results also support the need for cross-layer signaling and control in facilitating efficient management and utilization of heterogeneous wireless networks.

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“…One way is to extend TCP, similar to the explicit notification mechanism by setting an Explicit Mobility Notification (EMN) flag [10] and introducing an Explicit Handover Notification bit [11,13] in a specially marked TCP acknowledgement segment, or using a special option in TCP [30]. This mode simplifies some of the inter-layer issues at the CN.…”

Section: Enhancement Of Inter-layer Interaction Between Tcp and Mipv6mentioning

confidence: 99%

“…+T oAR−nAR + T oAR−nAR + T CN−oAR (10) HMIPv6 [27] is another extension to MIPv6 for optimizing the handover latency by introducing a new entity of Mobility Anchor Point (MAP) severing as a local home agent. When the MN moves within the MAP domain (called intra-domain mobility), mobility is handled by the MAP, and the MN only performs the BU procedures (i.e.…”

Section: T Fmipv6 = T Cn−oar + T Cn−oar + T Cn−oarmentioning

confidence: 99%

A Cross-Layer Approach for Improving TCP Performance in Mobile Environments

Hogrefe

2008

Wireless Pers Commun

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Network-layer mobility protocols have been developed to keep continuous connectivity for mobile hosts while transparent to the higher layers. However, Due to its distinct characteristics of different from traditional TCP/IP environment, mobility poses substantial impacts on TCP performance in mobile environments. This paper proposes a new cross-layer approach, by introducing a mobility detection element in the network layer which interacts with the transport layer to optimize TCP operations. As changes are only made to the endpoints, this approach preserves the end-to-end semantics of TCP. Different from most exiting works, which utilize either transport or network layer alone without much cross-layer cooperation, our approach allows the use of mobility information in TCP. We analytically compare this approach against existing approaches and show that our approach outperforms prior approaches in terms of effective data resumption time. Through performance simulations, our approach demonstrates that it can effectively improve TCP performance in Mobile IPv6-based mobile environments.

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Effect of vertical handovers on performance of TCP-friendly rate control

Cited by 74 publications

References 42 publications

Explicit Congestion Control Algorithms for Time Varying Capacity Media

Explicit Congestion Control Algorithms for Time Varying Capacity Media

Cross-layer optimized video streaming in heterogeneous wireless networks

A Cross-Layer Approach for Improving TCP Performance in Mobile Environments

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