Abstract
In heterogeneous cellular networks (HetNets), small base stations (SBSs) are overlaid in the coverage region of a macro base station (MBS) to improve coverage and spectral efficiency. However, the performance of HetNets is significantly degraded by inter-cell interference (ICI) due to aggressive frequency reuse and multi-tier deployment. Besides ICI, the uplink (UL) communications of MBS edge-users (M-EUs) are prone to jammers’ interference (JI) due to wide-band jammers (WBJs). With sufficient knowledge of network parameters, such as frequency bands and transmit powers, WBJs inject JI in the UL communications band to affect legitimate communications by degrading UL signal-to-interference ratio (SIR). Such distributed denial-of-service (DDoS) attacks normally target organizations, shopping malls, or public gatherings by clustering around them. As a countermeasure, we use decoupled association (DeCA) for the M-EUs, as opposed to the coupled association (CA), to improve UL SIR. Additionally, we use proactive interference management scheme, known as reverse frequency allocation (RFA), along with DeCA to resist both ICI and JI. The results show that WBJs cluster effectively degrades the legitimate UL communications of the target. The results also demonstrate that the network performance degrades significantly by increasing jammers’ density and transmit power. Furthermore, DeCA with RFA leads to improved network performance due to effective ICI and JI mitigation.
Highlights
MOTIVATION In heterogeneous cellular networks (HetNets), coverage probability, throughput and spectrum efficiency are significantly improved by ultra-dense small base station (SBS) deployment in the macro base station (MBS) coverage area [1], [2]
We investigate clustered wide-band jammers (WBJs) attacks, where the WBJs are placed around the target in close proximity
The results are generated by investigating different network parameters, such as SINR threshold, jammers’ transmit power and density, SBS density, typical user UL transmit power, and radius of jammers’ cluster
Summary
They consider both uniform and nonuniform SBS distributions in the premises of MBS and analyze the effect of SFR scheme on the proposed model Their results demonstrate that joint NUH along with SFR improves the network performance gain due to effective interference mitigation. 3) To reduce the effect of ICI and JI, we consider DeCA along with RFA to improve UL SIR of the targets located in the MBS edge area. 4) Coverage probability expressions are derived for the following network scenarios, given that ν is located in AgM ∀ g ∈ (c, o): (i) UL coverage probability with RFA, CA, and WBJs, and (ii) UL coverage probability with RFA, DeCA, and WBJs. 5) The results are generated for various parameters, such as MBS SIR threshold, βM, power transmitted by WBJs, Pt,J , jammers’ density in the cluster, c, SBS density, λS, UL transmitted power by ν, PUt,νL, and cluster radius, R.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call