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 A Cross Video-MAC Layer Approach for Generating Adaptive FMO Map

1970 ◽  
Vol 6 (1) ◽  
pp. 58-63
Author(s):  
Tien Huu Vu ◽  
Supavadee Aramvith
Keyword(s):  
Video Transmission ◽  
Video Quality ◽  
Arrival Rate ◽  
Ieee 802.11E ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Mac Layer ◽  
Medium Access ◽  
Error Resiliency ◽  
Map Generation

Recent researches in video transmission over heterogeneous networks move toward cross-layer design to realize the optimal video quality. In this work, we investigate the cross layer approach between H.264 video coding layer and IEEE 802.11e Medium Access Control (MAC) layer on the issues of how to improve error resiliency of H.264 video using Flexible Macroblock Ordering (FMO), and how to reduce packet dropping rate at MAC layer. We propose an adaptive FMO map generation to separate high and low important macroblocks to different priority queues based on the overflow state of MAC layer queues. The arrival rate of packets to queues is thus changed to reduce the queue overflow and to decrease of the packet droppingrates at queues. Experimental results show that using the proposed scheme can reduce the packet drop rate at the queues resulting in the reduction of packet loss rate and the improvement of the average PSNR.

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 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.

An Improved Cross-Layer Architecture for H.264/SVC Transmission over IEEE 802.11e Networks

2013 ◽  
Vol 303-306 ◽  
pp. 1933-1938
Author(s):  
Yun Feng Wang ◽  
Hong Bing Ma
Keyword(s):  
Video Transmission ◽  
Scalable Video Coding ◽  
Video Quality ◽  
Wireless Channel ◽  
Ieee 802.11E ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Application Layer ◽  
Mapping Mechanism

As an extension to H.264, Scalable Video Coding (SVC) provides three types of scalability, which makes it more suitable for the video transmission over wireless networks. IEEE 802.11e introduces EDCA mechanism to support Quality of Service (QoS). In this paper, a scheme, based on cross-layer design between application layer and MAC layer, is proposed to improve SVC transmission over 802.11e networks. With optimized mapping mechanism and queue management, the approach has taken the SVC video priority and network congestion status into consideration. Simulation demonstrates the effectiveness of the algorithm. The experimental results show that our approach can get full use of the limited wireless channel resources, by which SVC packets with high priority can obtain better protection, thus the decoding video quality can be significantly improved.

scholarly journals Cross-Layer Analysis of Multi-Static RFID Systems Exploiting Capture Diversity

2021 ◽  
Author(s):  
Roberto Valentini ◽  
Piergiuseppe Di Marco ◽  
Roberto Alesii ◽  
Fortunato Santucci
Keyword(s):  
Mac Protocol ◽  
Wireless Channel ◽  
Cross Layer ◽  
Mac Layer ◽  
Medium Access ◽  
Rfid Systems ◽  
Layer Analysis ◽  
Passive Rfid ◽  
The Impact ◽  
Collision Mechanism

In this paper, we propose a framework for cross-layer analysis of multi-static passive RFID systems. The model takes into account details of the shared wireless channel, including fading and capture effect, whereas, at the medium access control (MAC) layer, the anti-collision mechanism proposed in the EPC Generation 2 standard is taken as a reference.<br>To address the complexity of the system model, we rely on a semi-analytical approach, that combines a moment matching approximation method to abstract the physical layer and Monte-Carlo simulations to describe the MAC dynamics.<br>Furthermore, based on the space diversity feature offered by the multi-static settings, we introduce the concept of capture deiversity and propose a modification to the standard to fully support this form of diversity.<br>Numerical results show the impact of deployment conditions and the relative positions of interrogator, tags, and detection points on the performance of tags' identification. We show how the number of detection points impacts the system performance under various channel conditions and MAC parameters' settings. Finally, we validate the proposed update of the MAC protocol, showing substantial performance improvement with respect to the standard collision resolution policy.

scholarly journals Cross-Layer Analysis of Multi-Static RFID Systems Exploiting Capture Diversity

2021 ◽  
Author(s):  
Roberto Valentini ◽  
Piergiuseppe Di Marco ◽  
Roberto Alesii ◽  
Fortunato Santucci
Keyword(s):  
Mac Protocol ◽  
Wireless Channel ◽  
Cross Layer ◽  
Mac Layer ◽  
Medium Access ◽  
Rfid Systems ◽  
Layer Analysis ◽  
Passive Rfid ◽  
The Impact ◽  
Collision Mechanism

In this paper, we propose a framework for cross-layer analysis of multi-static passive RFID systems. The model takes into account details of the shared wireless channel, including fading and capture effect, whereas, at the medium access control (MAC) layer, the anti-collision mechanism proposed in the EPC Generation 2 standard is taken as a reference.<br>To address the complexity of the system model, we rely on a semi-analytical approach, that combines a moment matching approximation method to abstract the physical layer and Monte-Carlo simulations to describe the MAC dynamics.<br>Furthermore, based on the space diversity feature offered by the multi-static settings, we introduce the concept of capture deiversity and propose a modification to the standard to fully support this form of diversity.<br>Numerical results show the impact of deployment conditions and the relative positions of interrogator, tags, and detection points on the performance of tags' identification. We show how the number of detection points impacts the system performance under various channel conditions and MAC parameters' settings. Finally, we validate the proposed update of the MAC protocol, showing substantial performance improvement with respect to the standard collision resolution policy.

scholarly journals MAC Protocols for Wireless Body Sensor Network

2021 ◽  
Author(s):  
Harminder Kaur ◽  
Sharvan Kumar Pahuja
Keyword(s):  
Energy Consumption ◽  
Sensor Networks ◽  
Mac Protocols ◽  
The Body ◽  
Body Sensor Networks ◽  
Mac Layer ◽  
Medium Access ◽  
Wireless Medium ◽  
Network Quality ◽  
Wireless Body Sensor Networks

Wireless Body Area Networks, also known as the Wireless Body Sensor Networks, provides the monitoring of the health parameters in remote areas and where the medical facility is not available. Wireless Body Sensor Networks contains the body or placement of the sensors on body for measuring the medical and non-medical parameters. These networks share the wireless medium for the transmission of the data from one place to another. So the design of Medium Access Control is a challenging task for the WBSNs due to wireless media for less energy consumption and mobility. Various MAC protocols are designed to provide less energy consumption and improve the network lifetime. This paper presents the study of these existing MAC layer protocols based on different QoS parameters that define the network quality.

Hybrid MAC Layer Design for MPEG-4 Video Transmission in WSN

2014 ◽  
pp. 410-432
Author(s):  
Nor-Syahidatul N. Ismail ◽  
Sharifah H. S. Ariffin ◽  
N. M. Abdul Latiff ◽  
Farizah Yunus ◽  
Norshiela Fisal
Keyword(s):  
Low Power ◽  
Multiple Access ◽  
Video Transmission ◽  
Low Cost ◽  
Random Access ◽  
Protocol Design ◽  
Mac Layer ◽  
Medium Access ◽  
Wireless Medium ◽  
Time Division

Wireless Sensor Networks (WSNs) have been attracting increasing interest lately from the research community and industry. The main reason for such interest is the fact that WSNs are considered a promising means of low power and low cost communication that can be easily deployed. Nowadays, the advanced protocol design in WSNs has enhanced their capability to transfer video in the wireless medium. In this chapter, a comprehensive study of Medium Access Control (MAC) and MPEG-4 video transmission is presented. Various classifications of MAC protocols are explained such as random access, schedule access, and hybrid access. In addition, a hybrid MAC layer protocol design is proposed, which combines Carrier Sense Multiple Access (CSMA) and unsynchronized Time Division Multiple Access (TDMA) protocols using a token approach protocol. The main objective of this chapters is to present the design of a MAC layer that can support video transfer between nodes at low power consumption and achieve the level of quality of service (QoS) required by video applications.

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