Theoretical Maximum Throughput of IEEE 802.11 and its Applications
NCA '03 Proceedings of the Second IEEE International Symposium on Network Computing and Applications
Robust rate adaptation for 802.11 wireless networks
Proceedings of the 12th annual international conference on Mobile computing and networking
Improving Scalable Video Transmission over IEEE 802.11e through a Cross-Layer Architecture
ICWMC '08 Proceedings of the 2008 The Fourth International Conference on Wireless and Mobile Communications
An H.264/SVC-based adaptation proxy on a WiFi router
Proceedings of the 18th International Workshop on Network and Operating Systems Support for Digital Audio and Video
System and Transport Interface of SVC
IEEE Transactions on Circuits and Systems for Video Technology
Adaptable system based on Scalable Video Coding for high-quality video service
Computers and Electrical Engineering
Subjective evaluation of critical success factors for a QoE aware adaptive system
Computer Communications
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In this paper, we present an approach for in-network adaptation of H.264/SVC in the context of 802.11 wireless networks. It builds upon our previous work on an adaptive RTSP/RTP proxy which allows to adapt video streams on Linux-based home router platforms. The proposed approach tackles the throughput variations that occur as a consequence of the physical rate adaptation in 802.11 equipment caused by the mobility of clients. By combining monitoring information available exclusively on the wireless router with the ability to adapt scalable video streams on-the-fly, the proposed in-network adaptation approach allows to quickly adjust the video bit rate to the current link conditions. Instead of reacting on packet loss, our approach uses an increase in queueing delay at the router to detect phases of throughput degradation. This allows a higher responsiveness compared to traditional end-to-end approaches that rely solely on RTCP feedback. The behavior of our novel approach was evaluated in several mobility scenarios in an experimental test bed. The results obtained by streaming and adapting high-definition content clearly demonstrate the feasibility and benefits of this approach.