sil2.12043 (1).pdf (937.75 kB)
Download fileCooperative caching and coordinated beamforming technique for cognitive radio networks
journal contribution
posted on 2021-07-19, 10:17 authored by Ashraf Bsebsu, Gan Zheng, Sangarapillai LambotharanSangarapillai LambotharanScarcity of frequency spectrum is one of the main issues in wireless communications.
Cognitive radio networks (CRNs) have been considered as an effective way of improving
the spectrum efficiency by opportunistically using the spectrum resources through
appropriate cooperation between primary and secondary networks. Exploitation of
content caching in CRNs can enhance the system performance and reduce the backhaul
cost and delay. In this paper, we propose a combined caching strategy and base station
coordination in CRNs to achieve a proper balance between the signal cooperation gain
and the content diversity gain. Depending on the availability and placement of the
requested content, we propose a zero‐forcing coordinated beamforming technique to
simultaneously transmit the most popular contents that are cached in every secondary
base station and achieve the signal cooperation multiplexing gains, also we propose a
maximum ratio transmission technique to deliver the less popular contents which are
cached in different secondary base stations and achieve the caching diversity gain.
Enumeration of the solution space search is used to obtain the optimal cache solution.
Numerical results show that our proposed solution outperforms the cooperative caching
and transmission solution proposed where only a maximum ratio transmission technique
is used.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
IET SIGNAL PROCESSINGVolume
15Issue
7Pages
449-458Publisher
WILEYVersion
- VoR (Version of Record)
Rights holder
© The authorsPublisher statement
This is an Open Access Article. It is published by Wiley under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/Acceptance date
2021-04-07Publication date
2021-05-12Copyright date
2021eISSN
1751-9683Publisher version
Language
- en