Traffic Analysis and Video Quality Evaluation of Multiple Description Coded Video Services for Fourth Generation Wireless IP Networks

Fitzek, Frank H. P.; Can, Başak; Prasad, Ramjee; Katz, Marcos

doi:10.1007/s11277-005-8748-4

Cited by 14 publications

(4 citation statements)

References 8 publications

(9 reference statements)

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“…The PSNR with a type 2 service is set to 33 dB while it is set to 28 dB with a type 2* service [21]. We assume that the number of the type 2 services in cell 1 is "n2" while the number of the type 2* services in cell 1 are "n3".…”

Section: Effect Of Increasing the Threshold Of Adaptive Codingmentioning

confidence: 99%

Admission control policy for adaptive multirate multiservices in cellular systems

Wang

Pan

2012

J Wireless Com Network

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Forced termination of connections during handover and blocked connection initiation are annoying from the perspective of multiservice cellular system users. Previous studies have shown that an admission control policy reduces the dropping probability to a much lower level but at the cost of raising the blocking probability to a higher level. As an alternative for reducing both blocking and dropping probabilities, we make use of the Adaptive Multirate (AMR) scheme, which is a well-known real-time streaming coding technique. For an example of AMR technique, a video source is encoded into multiple independent descriptions. A cellular device, depending on its available computing and network resources, joins different descriptions to meet performance requirements. The base layer is received and the enhancement layer(s) are abandoned if the cellular capacity is insufficient for high-quality video. Mobile cellular devices currently obtain basic video quality at a lower frame rate. AMR services can substantially improve the degree of user satisfaction and guarantee the connection-level quality of service (QoS) for different multimedia. In cellular systems, the QoS requirements of different services require a connection admission control (CAC) that limits the number of connections in each access network. Therefore, we focus on the CAC and connection-level QoS of multiservice traffic using adaptive coding in mobile cellular systems. We initially analyzed our CAC policy in a multiservices cellular system by formulating the CAC policy functions, arrival rate, departure rate, blocking probability, and dropping probability of the multiservices, before we derived the connection-level QoS and verified it by simulation. The adaptive coding of multiservices traffic has a significant impact on the connection-level QoS in multiservice cellular systems. Our method decreased the blocking and dropping probabilities by adapting multirate services while users were roaming. Mobile cellular operators providing AMR services could apply our CAC to fulfill the quality requirements of the user experience and also improve the connection-level QoS.

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Section: Effect Of Increasing the Threshold Of Adaptive Codingmentioning

confidence: 99%

Admission control policy for adaptive multirate multiservices in cellular systems

Wang

Pan

2012

J Wireless Com Network

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“…This is similar to the work in [7], where a file can be split bytewise for cooperative video streaming leading to some overhead due to the splitting. Those overheads are reported in [12]. Furthermore, the way the users access the web service makes it suitable for cooperation.…”

Section: Related Work and Motivationmentioning

confidence: 99%

Cooperative Mobile Web Browsing

Perrucci

Fitzek

Zhang

et al. 2009

J Wireless Com Network

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This paper advocates a novel approach for mobile web browsing based on cooperation among wireless devices within close proximity operating in a cellular environment. In the actual state of the art, mobile phones can access the web using different cellular technologies. However, the supported data rates are not sufficient to cope with the ever increasing traffic requirements resulting from advanced and rich content services. Extending the state of the art, higher data rates can only be achieved by increasing complexity, cost, and energy consumption of mobile phones. In contrast to the linear extension of current technology, we propose a novel architecture where mobile phones are grouped together in clusters, using a short-range communication such as Bluetooth, sharing, and accumulating their cellular capacity. The accumulated data rate resulting from collaborative interactions over short-range links can then be used for cooperative mobile web browsing. By implementing the cooperative web browsing on commercial mobile phones, it will be shown that better performance is achieved in terms of increased data rate and therefore reduced access times, resulting in a significantly enhanced web browsing user experience on mobile phones.

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“…This multiplexing gain can be used to double the encoding bit rate and, as a result, offer higher encoding quality, or alternatively to support several (in the 2 Â 2 system in question, two) users. 7 Case 3 in turn has the potential for using the weaker channel, e.g. for best-endeavour data.…”

Section: Performance Evaluation Of MDC and Sdc For Mimo-svd Systemsmentioning

confidence: 99%

“…One particularly promising technique is multiple-description coding (MDC), proposed in recent years to increase the robustness of video transport over fixed [14], and subsequently wireless [6,7] networks. The purpose of MDC is to introduce redundancy at the encoder to combat errors introduced in the channel.…”

Section: Introductionmentioning

confidence: 99%