Employing cross-layer assisted TCP algorithms to improve TCP performance with vertical handoffs

Daniel, Laila; Kojo, Markku

doi:10.1504/ijcnds.2008.021078

Cited by 14 publications

(13 citation statements)

References 29 publications

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“…Nonetheless, the mentioned solutions do not target fast convergence to fairness, leading to conditions where short-lived flows become over-provisioned, since they cannot obtain their full allotted share in their short lifetime (Tan and Yang, 2009). Notice that fast convergence is also a strong requirement in wireless networks, where connection hand-off is frequently performed between different access networks (Daniel and Kojo, 2008).…”

Section: Related Workmentioning

confidence: 99%

Fast-fair handling of flows

Tsioliaridou

Zhang

Liaskos

et al. 2017

IJCNDS

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Allocating fairly the maximum available bandwidth among competing flows is an important problem as it allows maximising system throughput and fairness. Given the dynamic nature of traffic load in current internet and the short duration of most modern applications, fast convergence to fairness is necessitated. In this paper, we use fairness as the major criterion to adjust traffic and present a novel congestion control scheme which allows each flow independently to estimate efficiently: 1) its deviation from the fair-share; 2) adjust its window to its fair-share. In our model, no flow is aware of the number of competitors in the channel, no flow is aware of the bandwidth and buffer capacity; however, the system reaches to equilibrium state fast, based on throughput measurements. Simulation results confirm that the proposed congestion scheme promotes fast system fairness without damaging system efficiency and responsiveness.

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Section: Related Workmentioning

confidence: 99%

Fast-fair handling of flows

Tsioliaridou

Zhang

Liaskos

et al. 2017

IJCNDS

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“…In [3], [4] the authors have designed a cross-layer assisted TCP solution for handoff situations. It is shown that TCP can benefit greatly by adjusting parameters according to a network handoff.…”

Section: Related Workmentioning

confidence: 99%

Cross-layer assisted TCP for seamless handoff in heterogeneous mobile wireless systems

Sinky

Hamdaoui

2013

2013 IEEE Global Communications Conference (GLOBECOM)

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We propose cross-layer assisted TCP enhancements to improve service quality of mobile users during handoff. Specifically, we investigate and resolve TCP issues that pertain to handovers between wireless networks with varying data rates. New adjustments to TCP's round trip time, congestion window, and acknowledgment mechanism are proposed to ensure seamless handoff. The performances of the proposed cross-layer assisted handoff TCP (TCP-CLAH) are evaluated and compared to those of TCP NewReno (TCP-NR). Our results show that TCP-CLAH outperforms TCP-NR significantly in terms of jitter, round-trip time, and queue size, thereby reducing service disruptions and glitches of ongoing communications substantially during a handoff.

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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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Employing cross-layer assisted TCP algorithms to improve TCP performance with vertical handoffs

Cited by 14 publications

References 29 publications

Fast-fair handling of flows

Fast-fair handling of flows

Cross-layer assisted TCP for seamless handoff in heterogeneous mobile wireless systems

Cross-layer optimized video streaming in heterogeneous wireless networks

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