eprintid: 10054646
rev_number: 31
eprint_status: archive
userid: 608
dir: disk0/10/05/46/46
datestamp: 2018-08-22 15:50:38
lastmod: 2021-09-26 22:48:42
status_changed: 2019-03-25 13:37:21
type: article
metadata_visibility: show
creators_name: Wang, L
creators_name: Wong, KK
creators_name: Lambotharan, S
creators_name: Nallanathan, A
creators_name: Elkashlan, M
title: Edge Caching in Dense Heterogeneous Cellular Networks with Massive MIMO Aided Self-backhaul
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F46
keywords: Edge caching, 
dense small cell, 
massive MIMO, 
self-backhaul
note: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/.
abstract: This paper focuses on edge caching in dense heterogeneous cellular networks (HetNets), in which small base stations (SBSs) with limited cache size store the popular contents, and massive multiple-input multiple-output (MIMO) aided macro base stations provide wireless self-backhaul when SBSs require the non-cached contents. Our aim is to address the effects of cell load and hit probability on the successful content delivery (SCD), and present the minimum required base station density for avoiding the access overload in an arbitrary small cell and backhaul overload in an arbitrary macrocell. The achievable rate of massive MIMO backhaul without any downlink channel estimation is derived to calculate the backhaul time, and the latency is also evaluated in such networks. The analytical results confirm that hit probability needs to be appropriately selected, in order to achieve SCD. The interplay between cache size and SCD is explicitly quantified. It is theoretically demonstrated that when non-cached contents are requested, the average delay of the non-cached content delivery could be comparable to the cached content delivery with the help of massive MIMO aided selfbackhaul, if the average access rate of cached content delivery is lower than that of self-backhauled content delivery. Simulation results are presented to validate our analysis.
date: 2018-09-01
date_type: published
official_url: https://doi.org/10.1109/TWC.2018.2859936
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
article_type_text: Article
verified: verified_manual
elements_id: 1576821
doi: 10.1109/TWC.2018.2859936
lyricists_name: Wang, Lifeng
lyricists_name: Wong, Kai-Kit
lyricists_id: LWANB40
lyricists_id: KWONG98
actors_name: Sharp, Catherine
actors_id: CLSHA04
actors_role: owner
full_text_status: public
publication: IEEE Transactions on Wireless Communications
volume: 17
number: 9
pagerange: 6360-6372
issn: 1536-1276
citation:        Wang, L;    Wong, KK;    Lambotharan, S;    Nallanathan, A;    Elkashlan, M;      (2018)    Edge Caching in Dense Heterogeneous Cellular Networks with Massive MIMO Aided Self-backhaul.                   IEEE Transactions on Wireless Communications , 17  (9)   pp. 6360-6372.    10.1109/TWC.2018.2859936 <https://doi.org/10.1109/TWC.2018.2859936>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10054646/7/Wong%2008424570.pdf