Audience-Retention-Rate-Aware Caching and Coded Video Delivery with Asynchronous Demands

08/14/2018
by   Qianqian Yang, et al.
0

Most results on coded caching focus on a static scenario, in which a fixed number of users synchronously place their requests from a content library, and the performance is measured in terms of the latency in satisfying all of these demands. In practice, however, users start watching an online video content asynchronously over time, and often abort watching a video before it is completed. The latter behaviour is captured by the notion of audience retention rate, which measures the portion of a video content watched on average. In order to bring coded caching one step closer to practice, asynchronous user demands are considered in this paper, by allowing user demands to arrive randomly over time, and both the popularity of video files, and the audience retention rates are taken into account. A decentralized partial coded caching (PCC) scheme is proposed, together with two cache allocation schemes; namely the optimal cache allocation (OCA) and the popularity-based cache allocation (PCA), which allocate users' caches among different chunks of the video files in the library. Numerical results validate that the proposed PCC scheme, either with OCA or PCA, outperforms conventional uncoded caching as well as the state-of-the-art decentralized caching schemes, which consider only the file popularities, and are designed for synchronous demand arrivals. An information-theoretical lower bound on the average delivery rate is also presented.

READ FULL TEXT

page 1

page 2

page 3

page 4

research
05/03/2020

On Secure Coded Caching via Combinatorial Method

Coded caching is an efficient way to reduce network traffic congestion d...
research
02/04/2018

Uncoded Caching and Cross-level Coded Delivery for Non-uniform File Popularity

Proactive content caching at user devices and coded delivery is studied ...
research
03/31/2022

Multi-access Coded Caching with Decentralized Prefetching

An extension of coded caching referred to as multi-access coded caching ...
research
12/09/2017

Caching and Coded Delivery over Gaussian Broadcast Channels for Energy Efficiency

A cache-aided K-user Gaussian broadcast channel (BC) is considered. The ...
research
04/20/2018

On the Effects of Subpacketization in Content-Centric Mobile Networks

A large-scale content-centric mobile ad hoc network employing subpacketi...
research
06/12/2018

On Coding for Cache-Aided Delivery of Dynamic Correlated Content

Cache-aided coded multicast leverages side information at wireless edge ...
research
05/23/2019

Rate-Distortion-Memory Trade-offs in Heterogeneous Caching Networks

Mobile network operators are considering caching as one of the strategie...

Please sign up or login with your details

Forgot password? Click here to reset