An information-aware QoE-centric mobile video cache

Abstract

Recent years have seen a tremendous growth in the volume of video traffic in mobile settings. In this paper, we present the design of a mobile video-centric proxy cache, named iProxy, that offers improved performance in terms of both hit rates and streaming quality. Our thesis in designing iProxy is that we need to elevate the traditional view of caching from "data" to "information" in order to optimally meet the stringent requirements of video streaming in mobile settings. iProxy relies on recent advances on informationbound references (IBRs) to collapse multiple related cache entries into a single one, improving hitrate while lowering storage costs. iProxy incorporates a novel dynamic linear rate adaptation scheme to ensure high stream quality in face of channel diversity and device heterogeneity. Our evaluation of iProxy using realistic traffic traces shows that it can improve hitrate, but we need to use novel information-aware replacement policies for optimal performance. We show that our linear encoder can adapt well to changes in bandwidth, and yield better bit rates, lower buffering and lower start up delays than state-of-the-art schemes.

Information-centric mobile caching network frameworks and caching optimization: a survey

“…Discrete event-driven simulator is used in [45,46,54,58], and trace-based simulation is performed in [30,43,106,107].…”

“…In [106], a mobile video-centric proxy cache named iProxy is designed in cellular network for mobile video providers, and an Info-aware Cache Replacement policy called LFU-based IBR-score is provided and evaluated. Information-bound references (IBRs) is used to map multiple URLs to one IBR value (associates with a single video file) in order to collapse multiple related cache entries into a single one.…”

Reliable multicast routing for software-defined networks

“…Nevertheless, it has been manifested that this simple sourcerecovery strategy is not scalable [11], [12] for multicast to support a large number of destinations, because the source node will be overwhelmed by the acknowledgement from the destinations and the required recovery traffic. To effectively address this issue, by exploiting the idea of local services via proxy servers [22], a hierarchical architecture [11], [12] with on-tree recovery nodes placed between the source and the destinations is proposed to facilitate local loss recovery, while the deployment of the recovery nodes has not been considered as an issue in the previous works since the recovery nodes only need to support temporary caching, and the literature thus mostly focused on the development of a low-overhead protocol with acknowledgement (ACK) or negative acknowledgement (NAK). Specifically, Reliable Multicast Transport Protocol II (RMTP-II) [11] properly designed the interval between subsequent ACKs to reduce the number of ACK messages from a destination to its recovery node, or from a child recovery node to its parent recovery node.…”

Effective content-based video caching with cache-friendly encoding and media-aware chunking

“…One way to get around this problem is to cache the video based on its information bound reference (IBR) [32]. IBR extracts intrinsic features from each video, and compare them to identify the same content.…”

“…A recent work deals with caching the "perceptually" same videos of different encoding [32]. That is, it attempts to identify the videos whose content is indistinguishable by human eyes but that have distinct binaries due to encoding difference.…”