MDS-Coded Distributed Caching for Low Delay Wireless Content Delivery
Artikel i vetenskaplig tidskrift, 2019

We investigate the use of maximum distance separable (MDS) codes to cache popular content to reduce the download delay of wireless content delivery. In particular, we consider a cellular system, where popular files are cached in a distributed fashion in a limited number of the mobile devices using an MDS code and can be downloaded from them using device-to-device (D2D) communication. The base station controls the D2D communication and assists the requests that cannot be fully satisfied by the distributed caching (DC) network by providing the missing data. We consider a network model, where the cell is divided into clusters, where D2D links can be activated. We derive an analytical expression for the delay incurred in downloading content from the wireless network assuming that devices roam in and out of clusters according to a Poisson random process. Our analysis allows to identify the parameters of the wireless network that mostly affect the performance and to compare different caching strategies in terms of delay. We show that DC using MDS codes can dramatically reduce the download delay with respect to the scenario where content is always downloaded from the base station and to the case of uncoded DC.

device-to-device communication

coding

caching

maximum distance separable codes

content delivery

Författare

Amina Piemontese

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Alexandre Graell i Amat

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

IEEE Transactions on Communications

00906778 (ISSN)

Vol. 67 2 1600-1612

Distribuerad lagring för datalagring och trådlös leverans av data

Vetenskapsrådet (VR), 2016-01-01 -- 2019-12-31.

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Kommunikationssystem

DOI

10.1109/TCOMM.2018.2876921

Mer information

Senast uppdaterat

2019-07-19