Ipb-frame adaptive mapping mechanism for video transmission over IEEE 802.11e WLANs

Yao, Xin-Wei; Wang, Wanliang; Yang, Shuang–Hua; Cen, Yue-Feng; Yao, Xiaomin; Pan, Tie-Qiang

doi:10.1145/2602204.2602206

Cited by 21 publications

(3 citation statements)

References 12 publications

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“…Another solution, proposed in 2014 by Yao et al [24], describes, specifically for an H.264 video stream, an IPBframe adaptive mapping-mechanism, using IEEE 802.11e standard. This standard implements the requirements of QoS classification on the entering video transmissions, by creating different access categorys (ACs) and then classifying different video frames to them, according to their priority.…”

Section: Related Workmentioning

confidence: 99%

Real-time video frame differentiation in multihomed VANETs

2021

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Providing high quality video transmission in VANETs is very challenging due to the highly dynamic, unpredictable topology, and low bandwidth characteristics. In this article, we design a system able to optimally transmit RTP video streams in an IP-based multihomed VANET. By splitting the video through its different frame types in the array of multihomed paths from the center node of the network to the clients, the system can then send critical frames, depending on the used coding standard, through a more reliable path, in order to improve the video performance even if the quality is degraded due to bad signal reception. Two different content-based multihomed video distribution schemes have been proposed: linear selection, where the system is able to select more reliable paths for higher prioritized segments; and adaptive selection, where the paths are sensed to assess their congestion level in a real-time approach. Through real deployment of these approaches in a real vehicular scenario, with mobility, handovers and multihoming, the proposed approaches achieved a strong decrease in the loss percentage, with a maximum of approximately 60.4%, greatly improving the video quality while on the move.

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Section: Related Workmentioning

confidence: 99%

Real-time video frame differentiation in multihomed VANETs

2021

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“…Another solution, proposed in 2014 by Yao et al in [35], proposes, specifically for an H.264 coded video stream, an IPB-frame adaptive mapping mechanism, using the IEEE 802.11e standard. Such standard [36], which implements the requirements of QoS classification on the entering video transmissions by creating different access categories (ACs), is used in this work to classify different video frames to different ACs, according to their priority.…”

Section: Background and Related Workmentioning

confidence: 99%

Real-time Video Transmission in Multihomed Vehicular Networks

Lopes

Luís

Sargento

2019

2019 IEEE Vehicular Networking Conference (VNC)

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agradecimentos / acknowledgementsGostaria de usar este espaço para, primeiramente, agradecer a quem me deu a oportunidade de tornar este meu avanço em formação numa realidade. Aos meus pais, Fatima Lopes e Rui Lopes, um grande obrigado pelo constante apoio e dedicação neste meu caminho, desde sempre estando presentes e esforçando-se por darem sempre o melhor e da melhor forma. Dando continuidade, agradeço também o apoio dado pela minha madrinha Grázia Almeida, padrinho Pedro Ratola e prima Helena Carvalhal, que sempre se mostraram disponíveis e preocupados com o estado não só do meu trabalho, mas do meu estado-de-espírito na sua realização. À minha segunda família, os meus amigos

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“…802.11 DCF (that provides a uniform channel contention access) is a special case of 802.11 EDCA (that provides a prioritized channel contention access). Compared with DCF, EDCA can support quality of service for real-time applications and therefore has received continuing attention [23,24]. In EDCA, nodes belonging to high-priority (HP) access categories (ACs) are configured with a maximum contention window (CW) as small as 16, while nodes belonging to low-priority (LP) ACs are configured with a maximum CW as large as 1024.…”

Section: Introductionmentioning

confidence: 99%

Maximizing the stable throughput of high-priority traffic for wireless cyber-physical systems

Zhao

Sakurai

et al. 2016

J Wireless Com Network

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In wireless cyber-physical systems (CPS), more and more traffic with different priorities is required to be timely transmitted over wireless networks such as 802.11. In order to make full use of 802.11 networks to provide quality of service for wireless CPS, we are concerned with the throughput stability issue (i.e., how much traffic load can be sustained in an 802.11 network). Recent studies on the stability in 802.11 networks have arrived at contradictory conclusions. In this paper, we first delve into the reasons behind these contradictions. Our study manifests that the maximum stable throughput is not simply larger than, less than, or equal to the saturation throughput as argued in previous works. Instead, there exist two intervals, over which the maximum stable throughput follows different rules: over one interval, it may be far larger than the saturated throughput; over the other, it is tightly bounded by the saturated throughput. Most existing related research fails to differentiate the two intervals, implying that the derived results are inaccurate or hold true partially. We then point out that for the parameter settings in the 802.11 enhanced distributed channel access (EDCA) standard, high-priority (HP) traffic can achieve a stable throughput far higher than the saturated throughput, according to the rules we find. This indicates that the prior recommendation by other authors, advocating operating a wireless LAN far below the saturation load to achieve stable throughput and avoid unbounded delay, might be too conservative for many settings. We next propose an idle-sense-based scheme to maximize the stable throughput that HP traffic can achieve, when they coexist with low-priority (LP) traffic. Finally, we ran extensive simulations to verify the effectiveness of the revealed rules and the proposed scheme. This study helps utilize the limited bandwidth of wireless networks fully.

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Ipb-frame adaptive mapping mechanism for video transmission over IEEE 802.11e WLANs

Cited by 21 publications

References 12 publications

Real-time video frame differentiation in multihomed VANETs

Real-time video frame differentiation in multihomed VANETs

Real-time Video Transmission in Multihomed Vehicular Networks

Maximizing the stable throughput of high-priority traffic for wireless cyber-physical systems

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