Cross-layer architecture for scalable video transmission in 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) WLAN. The goal of the cross-layer design is to improve the quality of the video received in a wireless network under the constraint of network bandwidth. The approach is composed of two algorithms. First, an allocation of optimal TXOP is calculated which aims at maintaining a short queuing delay at the wireless station at the cost of a small TXOP allocation. Second, the transmission of the packets is scheduled according to the importance of the packets in order to maximize the visual quality of video. The approach is compared with the standard HCCA on NS2 simulation tools using H.264 video codec. The proposed cross-layer design outperforms the standard approach in terms of the PSNRs of the received video. This approach reduces the packet loss to allow the graceful video degradation, especially under heavy network traffic.

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Scalable video transmission with quality layers over IEEE 802.11e WLAN through a cross-layer design

2011 International Conference on Computational Problem-Solving (ICCP) ◽

10.1109/iccps.2011.6089771 ◽

2011 ◽

Cited By ~ 2

Author(s):

Yang Shi ◽

Ning Zhou ◽

Huiping Du ◽

Jin Xu

Keyword(s):

Video Transmission ◽

Ieee 802.11E ◽

Scalable Video ◽

Cross Layer ◽

Cross Layer Design

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A Cross-Layer Framework for Efficient Streaming of H.264 Video over IEEE 802.11 Networks

Journal of Computer Systems Networks and Communications ◽

10.1155/2009/682813 ◽

2009 ◽

Vol 2009 ◽

pp. 1-13 ◽

Cited By ~ 6

Author(s):

Azfar Moid ◽

Abraham O. Fapojuwo

Keyword(s):

Wireless Network ◽

Ieee 802.11 ◽

Video Transmission ◽

Processing Time ◽

Video Quality ◽

Cross Layer ◽

Packet Processing ◽

Network Parameter ◽

Transmission Parameters ◽

Buffer Length

This paper presents a framework for reliable and efficient streaming of H.264 video over an IEEE 802.11-based wireless network. The framework relies on a cross-layer mechanism that jointly adapts the video transcoding parameters at the application layer and the video transmission parameters at the data-link layer to the network conditions defined by buffer length and wireless propagation channel. The effectiveness of the proposed framework is demonstrated through the transmission of three test video sequences (Akiyo, Container, andForeman) having different degrees of motion over an IEEE802.11 wireless network. Simulation results show that the proposed cross-layer-based framework provides an enhancement of up to 3 dB in the video quality with a negligible increase (<5%) in the packet processing time. Hence, the proposed framework achieves a good balance in the tradeoff between video quality and packet processing time. The proposed framework, along with its performance results, provides valuable insights on the selection of network parameter values for efficient and reliable transmission of video applications in wireless networks.

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