On Cross-layer Adaptive Ieee 802.11e Edca Mac Design for Optimized H.264 Video Delivery over Wireless Mesh Networks

نویسندگان

  • Byung Joon Oh
  • Chang Wen Chen
  • Ivica Kostanic
  • Seung Ho Shin
  • Ki Young Lee
چکیده

We present in this paper a reliable optimized transmission of H.264 video streaming over IEEE 802.11e Wireless Mesh Networks (WMNs) based on a Cross-Layer Adaptive Enhanced Distributed Channel Access (CLA-EDCA) MAC architecture. The IEEE 802.11e EDCA offers a prioritized transmission to guarantee the minimum packets delay and drop rate needed for time bound applications, such as VoIP and Video. However, the standard EDCA scheme does not adapt to the network state to support time critical applications. In order to resolve the problems associated with standard EDCA, we highlight a novel adaptive architecture so as to change the Contention Window ( CW ) after each successful or unsuccessful transmission according to the current network conditions. We have integrated this cross-layer adaptive scheme leveraging smart forward error correction (FEC) schemes through channel state estimation (CSE) to achieve the optimal video transmission adapting to the network conditions. We have also explored several network level metrics, including bit rate, packets delay and drop rate, to evaluate the proposed scheme in comparison with IEEE 802.11e EDCA standard. Based on these extensive simulation results, we tested H.264 video transmission with both the proposed CLA-EDCA and the standard EDCA MAC. Simulation results have confirmed that the proposed CLA-EDCA outperforms the standard IEEE 802.11e EDCA by a significant margin with smart-FEC adapting to the network conditions over WMNs.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

QoS cross layer architecture with adaptive enhanced distributed channel access for efficient video transmission

Introduction Increased bandwidth of wireless technologies motivated delivery of video over wireless networks. H.264 compressed video source, applied to video coding layer (VCL) for high compression representation of video content, has a number of error resilience tools. Data partitioning (DP) creates partitions on highest data structure called slices. By enabling DP technique, VCL divides origi...

متن کامل

A novel cross-layer design using comb-shaped quadratic packet mapping for video delivery over 802.11e wireless ad hoc networks

Cross-layer design is a promising direction and challenging issue for quality delivery of multimedia over wireless networks. This article proposes a cross-layer design which can substantially enhance the transmission quality of video streaming over 802.11e ad hoc networks. The proposed design consists of two parts: a dispersive video frame importance (DVFI) scheme in the application layer that ...

متن کامل

An analytic study of a distributed EDCA-based QoS mapping for layered video delivery in WLAN

One of the key challenges in multimedia networks is video delivery over wireless channels. MRC (Multi-Resolution Coding) Layered video, divides video into a base layer and multiple enhancement layers. In this paper, we aim to improve video quality, impacted by high channel contention, through mapping individual video layers to EDCA (Enhanced Distributed Channel Access) access categories in orde...

متن کامل

QoS-Optimized Adaptive Multi-layer (OQAM) architecture of wireless network for high quality digital video transmission

Quality of Service (QoS) optimization is an important design goal in wireless video transmission. The application (APP) layer 802.11e medium access control (MAC) layer, and physical (PHY) layer of the wireless protocol stack can be jointly designed for the exchange of information. This will optimize the performance of wireless network for real-time digital video transmission. This paper propose...

متن کامل

A Cross-Layer Design for Video Streaming Over 802.11e HCCA Wireless Network

Video transmission over wireless networks has quality of service (QoS) requirements and the time-varying characteristics of wireless channels make it a challenging task. IEEE 802.11 Wireless LAN has been widely used for the last mile connection for multimedia transmission. In this paper, a cross-layer design is presented for video streaming over IEEE 802.11e HCF Controlled Channel Access (HCCA)...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2010