Title :
Dynamic media streaming over wireless and mobile IP networks
Author :
Gorius, Manuel ; Shuai, Yongtao ; Herfet, Thorsten
Author_Institution :
Telecommun. Lab., Saarland Univ., Saarbrucken, Germany
Abstract :
Due to the increasing number of portable and mobile consumer electronic devices, today´s Internet paths include generally at least one wireless segment. Predominant architectures are IEEE 802.11 wireless as well as 3G/4G mobile networks. While the actual bandwidth provisioning on those networks is no longer the limiting factor for high definition media streaming, the quality of such services is severely affected by TCP´s shortcomings on wireless paths. The transport protocol suffers from significant underutilization of the available bandwidth in presence of physical packet loss and large propagation delay. For dynamic HTTP streaming this underutilization translates directly into unnecessary quality reduction. In order to improve the quality of dynamic streaming on wireless networks, we implement a novel transport protocol - Predictably Reliable Real-time Transport (PRRT), a protocol layer that efficiently supports the reliability required by multimedia services under their specific time constraint. PRRT is based on hybrid error coding that allows for both proactive and reactive reliability mechanisms. Specifically, it is designed to achieve the optimal trade-off between those mechanisms under strict delay constraints in order to minimize coding overhead. Based on this transport protocol we present a dynamic media streaming architecture with near-optimal bandwidth utilization under equation-based congestion control. We evaluate PRRT´s bandwidth allocation and compare our dynamic streaming approach to HTTP-DASH (Dynamic Adaptive Streaming over HTTP) on a mobile broadband network as well as a wireless home network.
Keywords :
3G mobile communication; 4G mobile communication; IP networks; encoding; media streaming; quality of service; transport protocols; wireless LAN; 3G-4G mobile networks; HTTP-DASH; IEEE 802.11 wireless; Internet; PRRT; TCP; delay constraints; dynamic HTTP streaming; dynamic adaptive streaming; dynamic media streaming architecture; hybrid error coding; mobile IP networks; mobile broadband network; mobile consumer electronic devices; multimedia services; physical packet loss; portable consumer electronic devices; predictably reliable real- time transport; proactive reliability mechanisms; propagation delay; quality of services; reactive reliability mechanisms; transport protocol; underutilization; wireless IP networks; wireless home network; Bandwidth; Mobile communication; Protocols; Reliability; Streaming media; Throughput; Wireless communication; Dynamic Streaming; Mobile Video; Predictable Reliability; Wireless Media Streaming;
Conference_Titel :
Consumer Electronics - Berlin (ICCE-Berlin), 2012 IEEE International Conference on
Conference_Location :
Berlin
Print_ISBN :
978-1-4673-1546-3
DOI :
10.1109/ICCE-Berlin.2012.6336461