QoS Mapping between User’s Preference and Bandwidth Control for Video Transport

Abstract. The provision of network Quality-of-Service (network QoS) is a major challenge in the development of future communication systems. Before designing and implementing these systems, the network QoS requirements are to be specified. Existing approaches to the specification of network QoS requirements are mainly focused on specific domains or individual system layers. In this paper, we present a holistic, comprehensive formalization of network QoS requirements, across layers. QoS requirements are specified on each layer by defining QoS domain, consisting of QoS performance, reliability, and guarantee, and QoS scalability, with utility and cost functions. Furthermore, we derive preorders on multi-dimensional QoS domains, and present criteria to reduce these domains, leading to a manageable subset of QoS values that is sufficient for system design and implementation. The relationship between layers is formalized by two kinds of QoS mappings. QoS domain mappings associate QoS domains of two abstraction levels. QoS scalability mappings associate utility and cost functions of two abstraction levels. We illustrate our approach by examples from the case study Wireless Video Transmission.

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“…-Formal QoS mappings have not been studied thoroughly so far. Some partial results can be found in [9] and [10].…”

Section: Related Workmentioning

confidence: 99%

Formalization of Network Quality-of-Service Requirements

Webel

Gotzhein

2007

Lecture Notes in Computer Science

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“…Through experiments, it is shown that high-quality and TCP-friendly MPEG-2 video transfer can be performed with our proposed method. We take into account the relationship among quantizer scale, video rate and perceived video quality obtained in our research work on QoS mapping method for MPEG-2 video [14]. This is a good starting point of determining the control parameter appropriate for video rate adjustment with consideration of the perceived video quality.…”

Section: Fgs Video Coding Algorithmmentioning

confidence: 99%

MPEG-4 Video Transfer with TCP-Friendly Rate Control

Wakamiya

Miyabayashi

Murata

et al. 2001

Management of Multimedia on the Internet

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Abstract.It is widely known that network bandwidth is easily monopolized by distributed multimedia applications due to their greedy UDP traffic. In this paper, we propose TCP-friendly MPEG-4 video transfer methods which enable realtime video applications to fairly shares the bandwidth with conventional TCP data applications. We consider how video applications should regulate video quality to adjust video rate to the desired sending rate which is determined by TCP-friendly rate control algorithm. Carelessly applying TCP-friendly rate variation to the video application would seriously degrade the application-level QoS. For example, the control interval should be long enough to avoid the fluctuation of video quality caused by too frequent rate control. However, popular TCP-friendly rate control algorithms recommend that a non-TCP session regulates its sending rate more than once a RTT. Through simulation experiments, it is shown that high-quality and stable video transfer can be accomplished by our proposed methods.

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“…In Fig.4, we depict an example of the relationship among the quantizer scale, the average video rate and the video quality in terms of SNR (Signal to Noise Ratio) when a video sequence is coded by MPEG-2 VBR coding algorithm where a static quantizer scale is applied to all pictures in a sequence [11]. The video sequence consists of 150 pictures of 704 480 pixels and the frame rate is 29.97 fps.…”

Section: Video Rate Controlmentioning

confidence: 99%

“…The video sequence consists of 150 pictures of 704 480 pixels and the frame rate is 29.97 fps. By applying the method proposed in [11], we can easily determine the appropriate quantizer scale to adjust the video rate to the estimated TCP throughput.…”

Section: Video Rate Controlmentioning

confidence: 99%

On TCP-friendly video transfer with consideration on application-level QoS

Wakamiya

Murata²,

Miyahara³

2000 IEEE International Conference on Multimedia and Expo. ICME2000. Proceedings. Latest Advances in the Fast Changing World Of

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When both TCP and UDP sessions co-exist in the current Internet environment, the performance of TCP sessions easily deteriorate because of congestion incurred by UDP sessions of real-time multimedia applications.In this paper, we extend the TCP-friendly rate control protocol which originally pursuits the fair-share of link bandwidth among TCP and non-TCP sessions. With our proposed method, the achievable application-level QoS, such as perceived video quality and file transfer delay, becomes the same among TCP and non-TCP which traverse the same path. Through simulation experiments, we show that the high quality video transfer can be performed with our proposed method while satisfying the TCP-friendliness with regard to application-level QoS.

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QoS Mapping between User’s Preference and Bandwidth Control for Video Transport

Cited by 48 publications

References 9 publications

Formalization of Network Quality-of-Service Requirements

Formalization of Network Quality-of-Service Requirements

MPEG-4 Video Transfer with TCP-Friendly Rate Control

On TCP-friendly video transfer with consideration on application-level QoS

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