scholarly journals Cross-Layer Optimization for Efficient Delivery of Scalable Video over WiMAX

2016 ◽  
Vol 855 ◽  
pp. 171-177 ◽  
Author(s):  
Lung Jen Wang ◽  
Chiung Yun Chang ◽  
Jen Yi Huang
Keyword(s):  
Scalable Video ◽  
Cross Layer ◽  
Video Delivery ◽  
Application Layer ◽  
Mac Layer ◽  
Video Streams ◽  
Delivery Performance ◽  
Cross Layer Optimization ◽  
Efficient Delivery

Video delivery application over wireless network has become increasingly important in recent years. For achieving more flexible video streams transmission, the scalable extension of the H.264/AVC standard has been developed, as well as which is combined with temporal, spatial and quality scalabilities to adapt efficiently the wireless bandwidth resource. In this paper, a cross-layer optimization for robust H.264 scalable video delivery over WiMAX network is proposed. In order to obtain a better delivery performance, the proposed method is used the hierarchical B-picture approach to classify video packets into different priorities. In the cross-layer optimization, the scalable video and packet classifier are proposed at the application layer, and the packet priority and queue allocation are used at the MAC layer. Finally, it is shown by NS2 simulations that the proposed method provides more stable wireless bandwidth and also achieves a better quality of the video streaming delivery.

scholarly journals Efficient and Secure Multicast in WirelessMAN: A Cross-layer Design

2007 ◽  
Vol 3 (3) ◽  
pp. 199 ◽  
Author(s):  
Chin-Tser Huang ◽  
Manton Matthews ◽  
Matthew Ginley ◽  
Xinliang Zheng ◽  
Chuming Chen ◽  
...  
Keyword(s):  
Cross Layer ◽  
Cross Layer Design ◽  
Security Measures ◽  
Application Layer ◽  
Mac Layer ◽  
Forward Secrecy ◽  
Group Management ◽  
Multicast Service ◽  
Secure Protocol ◽  
Security Property

Effectively adding security measures to a multicast service is an intriguing problem, especially when the service isdeployed in a wireless setting. Next generation IEEE 802.16standard WirelessMAN networks are a perfect example of this problem, and the latest draft specification of the standard includes a secure protocol solution called Multicast and Broadcast Rekeying Algorithm (MBRA). In this paper, we expose the security problems of MBRA, including non-scalability and omission of backward and forward secrecy, and propose new approaches, ELAPSE and ELAPSE+, to address these problems. In particular, ELAPSE+ makes use of membership and mobility information gathered in the application layer to augment the adaptive group management in the MAC layer. We analyze the security property of ELAPSE and ELAPSE+, and compare their performances with MBRA by simulating group rekeying scenarios.

scholarly journals QoS Strategies for Wireless Multimedia Sensor Networks in the Context of IoT at the MAC Layer, Application Layer, and Cross-Layer Algorithms

2019 ◽  
Vol 2019 ◽  
pp. 1-33
Author(s):  
Muwonge Ssajjabbi Bernard ◽  
Tingrui Pei ◽  
Kimbugwe Nasser
Keyword(s):  
Energy Efficiency ◽  
Sensor Networks ◽  
System Optimization ◽  
Wireless Multimedia Sensor Networks ◽  
Sensor Data ◽  
Cross Layer ◽  
Wireless Multimedia ◽  
Application Layer ◽  
Mac Layer ◽  
Multimedia Sensor Networks

Wireless multimedia sensor networks (WMSNs) have got capacity to collect both scalar sensor data and multidimensional sensor data. It is the basis for the Internet of things (IoT). Quality of service (QoS) pointers like energy efficiency, reliability, bit error rate, and latency can be helpful in data collection estimation over a network. In this paper, we review a number of QoS strategies for WMSNs and wireless sensor networks (WSNs) in the IoT context from the perspective of the MAC and application layers as well as the cross-layer paradigm. Considering the MAC layer, since it is responsible for regulating the admittance to the shared medium and transmission reliability and efficiency through error correction in wireless transmissions, and for performance of framing, addressing, and flow control, the MAC protocol design greatly affects energy efficiency. We thus review a number of protocols here including contention-free and contention-based protocols as well as the hybrid of these. This paper also surveys a number of state-of-the-art machine-to-machine, publish/subscribe, and request/response protocols at the application layer. Cross-layer QoS strategies are very vital when it comes to system optimization. Many cross-layer strategies have been reviewed. For these QoS strategies, the challenges and opportunities are reviewed at each of the layers considered. Lastly, the future research directions for QoS strategies are discussed for research and application before concluding this paper.

scholarly journals Cross-Layer Optimization of Fast Video Delivery in Cache-Enabled Relaying Networks

2014 ◽  
Author(s):  
Lin Xiang ◽  
Derrick Wing Kwan Ng ◽  
Toufiqul Islam ◽  
Robert Schober ◽  
Vincent W. S. Wong
Keyword(s):  
Cross Layer ◽  
Video Delivery ◽  
Cross Layer Optimization ◽  
Relaying Networks

Cross-Layer Optimization for Video Transmission over WLAN

2012 ◽  
pp. 500-526
Author(s):  
Chih-Yu Wang ◽  
Yin-Cheng Huang ◽  
Cheng-Han Mai ◽  
Fu-Wang Chang ◽  
Hung-Yu Wei
Keyword(s):  
Video Coding ◽  
Video Quality ◽  
Cross Layer ◽  
Application Layer ◽  
Mac Layer ◽  
Medium Access ◽  
Access Delay ◽  
Video Frames ◽  
Wireless Medium ◽  
Advanced Video Coding

As IEEE 802.11 wireless devices have become increasingly widespread, providing Quality of Service in the context of H.264/AVC, the video coding standard for future multimedia networking, has become an important issue in the fields of communication and networking. Cross-Layer Adaptive Video Prioritization (CAVP) is a cross-layer framework that prioritizes video frame transmission according to the application-layer information and the MAC layer transmission condition. In this chapter, a Peak Signal-to-Noise Ratio (PSNR) estimation method is proposed to sort out different priorities of H.264/AVC (Advanced Video Coding) video frames at the application layer to provide user-centric media quality estimation. Compared to previous heuristic algorithms, the authors also investigate a theoretic access delay estimator to monitor the wireless medium access delay at the MAC layer. In addition, an admission control is employed to serve the delay-sensitive video application and to give higher priority to those critical video frames. Video packets are dynamically classified into different 802.11e access categories according to the level of wireless medium access delay and the priority of the video frames. The myths of naïvely prioritizing video packets based on I/P/B types as well as naïvely assign packets to high priority access categories in 802.11e are resolved. Rather than creating complex scheme that is unable to be implemented in practical scenarios, the authors design the proposed scheme with practical implementability in mind. The proposed scheme is implemented with Click kernel module and the MadWifi WLAN driver. The performance of proposed CAVP design is evaluated by both NS-2 simulations and real testbed experiments, and results show that it enhances receiving video quality in error-prone wireless networking environments.

scholarly journals QoE-Aware Cross-Layer Architecture for Video Traffic over Internet

2020 ◽  
Author(s):  
qahhar muhammad qadir ◽  
Alexander A. Kist ◽  
ZHONGWEI ZHANG
Keyword(s):  
Quality Of Experience ◽  
Rate Adaptation ◽  
Cross Layer ◽  
Foreseeable Future ◽  
Application Layer ◽  
Video Traffic ◽  
Transmission Rates ◽  
Active Video ◽  
Simulation Results

The emergence of video applications and video capable devices have contributed substantially to the increase of video traffic on Internet. New mechanisms recommending video rate adaptation towards delivering enhanced Quality of Experience (QoE) at the same time making room for more sessions. This paper introduces a cross-layer QoE-aware architecture for video traffic over the Internet. It proposes that video sources at the application layer adapt their rate to the network environment by controlling their transmitted bit rate dynamically; and the edge of network at the network layer protects the quality of the active video sessions by controlling the acceptance of new session through a video-aware admission control. In particular, it will seek the most efficient way of accepting new video session and adapting transmission rates to free up resources for more session while maintaining the QoE of active sessions. The proposed framework will contribute to the preparation for the extreme growth of video traffic in the foreseeable future. Simulation results show that the proposed cross-layer architecture guarantees the QoE for the admitted sessions and utilizes the link more efficiently comparing to the rate adaptation only architecture.

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