Circus: Opportunistic Block Reordering for Scalable Content Servers
FAST '04 Proceedings of the 3rd USENIX Conference on File and Storage Technologies
An energy-conscious transport protocol for multi-hop wireless networks
CoNEXT '07 Proceedings of the 2007 ACM CoNEXT conference
Rethinking FTP: Aggressive block reordering for large file transfers
ACM Transactions on Storage (TOS)
Safe and effective fine-grained TCP retransmissions for datacenter communication
Proceedings of the ACM SIGCOMM 2009 conference on Data communication
A binary partitioning approach to image compression using weighted finite automata for large images
Computers & Mathematics with Applications
Circus: opportunistic block reordering for scalable content servers
FAST'04 Proceedings of the 3rd USENIX conference on File and storage technologies
Efficient and robust large medical image retrieval in mobile cloud computing environment
Information Sciences: an International Journal
Hi-index | 0.00 |
Images account for a significant and growing fraction of Web downloads. The traditional approach to transporting images uses TCP, which provides a generic reliable, in-order byte-stream abstraction, but which is overly, restrictive for image data. We analyze the progression of image quality at the receiver with time and show that the in-order delivery abstraction provided by a TCP-based approach prevents the receiver application from processing and rendering portions of an image when they, actually, arrive. The end result is that an image is rendered in bursts interspersed with long idle times rather than smoothly. This paper describes the design, implementation, and evaluation of the Image Transport Protocol (ITP) for image transmission over loss-prone congested or wireless networks. ITP improves user-perceived latency using application level framing (ALF) and out-of-order pplication data unit (ADU) delivery achieving significantly better interactive performance as measured by the evolution of peak signal-to-noise ratio (PSNR) with time at the receiver ITP runs over UDP, incorporates receiver-driven selective reliability uses the congestion manager (CM) to adapt to network congestion, and is customizable for specific image formats (e.g., JPEG and JPEG2000). ITP enables a variety of new receiver post-processing algorithms such as error concealment that further improve the interactivity and responsiveness of reconstructed images. Performance experiments using our implementation across a variety of loss conditions demonstrate the benefits of ITP in improving the interactivity of image downloads at the receiver.