The University of Southampton
University of Southampton Institutional Repository

Secrecy transmit beamforming for heterogeneous networks

Secrecy transmit beamforming for heterogeneous networks
Secrecy transmit beamforming for heterogeneous networks
In this paper, we pioneer the study of physical-layer security in heterogeneous networks (HetNets). We investigate secure communications in a two-tier downlink HetNet, which comprises one macrocell and several femtocells. Each cell has multiple users and an eavesdropper attempts to wiretap the intended macrocell user. First, we consider an orthogonal spectrum allocation strategy to eliminate co-channel interference, and propose the secrecy transmit beamforming only operating in the macrocell (STB-OM) as a partial solution for secure communication in HetNet. Next, we consider a secrecy-oriented non-orthogonal spectrum allocation strategy and propose two cooperative STBs which rely on the collaboration amongst the macrocell base station (MBS) and the adjacent femtocell base stations (FBSs). Our first cooperative STB is the STB sequentially operating in the macrocell and femtocells (STB-SMF), where the cooperative FBSs individually design their STB matrices and then feed their performance metrics to the MBS for guiding the STB in the macrocell. Aiming to improve the performance of STB-SMF, we further propose the STB jointly designed in the macrocell and femtocells (STB-JMF), where all cooperative FBSs feed channel state information to the MBS for designing the joint STB. Unlike conventional STBs conceived for broadcasting or interference channels, the three proposed STB schemes all entail relatively sophisticated optimizations due to QoS constraints of the legitimate users. To efficiently use these STB schemes, the original optimization problems are reformulated and convex optimization techniques, such as second-order cone programming and semidefinite programming, are invoked to obtain the optimal solutions. Numerical results demonstrate that the proposed STB schemes are highly effective in improving the secrecy rate performance of HetNet.
Beamforming, femtocell, nonconvex optimization, heterogeneous network, physical-layer security, semidefinite programming (SDP).
1154-1170
Lv, Tiejun
fb465673-1068-4cae-bb94-93ab1dd63f4d
Gao, Hui
d1b095e6-df29-4eb6-b7fb-efa6baf8e162
Yang, Shaoshi
df1e6c38-ff3b-473e-b36b-4820db908e60
Lv, Tiejun
fb465673-1068-4cae-bb94-93ab1dd63f4d
Gao, Hui
d1b095e6-df29-4eb6-b7fb-efa6baf8e162
Yang, Shaoshi
df1e6c38-ff3b-473e-b36b-4820db908e60

Lv, Tiejun, Gao, Hui and Yang, Shaoshi (2015) Secrecy transmit beamforming for heterogeneous networks. [in special issue: on Recent Advances in Heterogeneous Cellular Networks] IEEE Journal on Selected Areas in Communications, 33 (6), 1154-1170. (doi:10.1109/JSAC.2015.2416984).

Record type: Article

Abstract

In this paper, we pioneer the study of physical-layer security in heterogeneous networks (HetNets). We investigate secure communications in a two-tier downlink HetNet, which comprises one macrocell and several femtocells. Each cell has multiple users and an eavesdropper attempts to wiretap the intended macrocell user. First, we consider an orthogonal spectrum allocation strategy to eliminate co-channel interference, and propose the secrecy transmit beamforming only operating in the macrocell (STB-OM) as a partial solution for secure communication in HetNet. Next, we consider a secrecy-oriented non-orthogonal spectrum allocation strategy and propose two cooperative STBs which rely on the collaboration amongst the macrocell base station (MBS) and the adjacent femtocell base stations (FBSs). Our first cooperative STB is the STB sequentially operating in the macrocell and femtocells (STB-SMF), where the cooperative FBSs individually design their STB matrices and then feed their performance metrics to the MBS for guiding the STB in the macrocell. Aiming to improve the performance of STB-SMF, we further propose the STB jointly designed in the macrocell and femtocells (STB-JMF), where all cooperative FBSs feed channel state information to the MBS for designing the joint STB. Unlike conventional STBs conceived for broadcasting or interference channels, the three proposed STB schemes all entail relatively sophisticated optimizations due to QoS constraints of the legitimate users. To efficiently use these STB schemes, the original optimization problems are reformulated and convex optimization techniques, such as second-order cone programming and semidefinite programming, are invoked to obtain the optimal solutions. Numerical results demonstrate that the proposed STB schemes are highly effective in improving the secrecy rate performance of HetNet.

PDF
JSAC2416984_Part1.pdf - Accepted Manuscript
Download (1MB)

More information

Published date: 27 March 2015
Keywords: Beamforming, femtocell, nonconvex optimization, heterogeneous network, physical-layer security, semidefinite programming (SDP).
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 374550
URI: https://eprints.soton.ac.uk/id/eprint/374550
PURE UUID: d2f638fd-8e2c-4c1c-a774-df2aa6ce5117

Catalogue record

Date deposited: 20 Feb 2015 14:14
Last modified: 17 Jul 2017 21:26

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×