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Abstract
Intentional jammers (IJs) can be used by attackers for the launching of distributed denial-of-service attacks in 5G cellular networks. These adversaries are assumed to have adequate information about the network specifications, such as duration, transmit power and positions. With these assumptions, the IJs gain the ability to disrupt the legitimate communication of the network. Heterogeneous cellular networks (HetNets) can be considered a vital enabler for 5G cellular networks. Small base stations (SBSs) are deployed inside macro base station (MBS) to improve spectral efficiency and capacity. Due to orthogonal frequency division multiplexing assumption, HetNets’ performance is mainly limited by inter-cell interference (ICI). Additionally, there exist IJs-interference (IJs-I), which significantly degrades the network coverage depending on the IJs’ transmit power levels and their proximity with the target. The proposed work explores the uplink (UL) coverage performance of HetNets in the presence of both IJs-I and ICI. Moreover, to reduce the effects of ICI and IJs-I, reverse frequency allocation (RFA) is employed which is a proactive interference abating scheme. In RFA, different sub-bands of the available spectrum are used by MBS and SBS in alternate regions. The proposed setup is evaluated both analytically as well as with the help of simulation. The results demonstrate considerable UL coverage performance improvement by effectively mitigating IJs-I and ICI.
Highlights
For Heterogeneous cellular networks (HetNets), coverage, bandwidth quality and performance is improved by implementation of ultra-dense Small base stations (SBSs) within the region served by Macro base station (MBS), as seen in Figure 1 [2,4]
The direction of radio transmissions of macro base station (MBS) are allotted to SBSs in reverse fashion, i.e., the UL frequencies of MBS are allotted as DL frequencies of SBS and DL frequencies of MBS are used as UL frequencies of SBSs [36]
The results indicate that an increase in the distribution area of the Intentional jammers (IJs) results in improved UL coverage due to a lower number of IJs per unit area, making the IJs less efficient as long as their transmission power is constant
Summary
Our reliance on wireless communication has increased many times [1,2]. It has made our lives easier due to its usefulness and effectiveness. Social networks and video streaming applications have increased our reliance on smart phones that leads to increased traffic load on cellular networks. Data usage has grown about 200% and, leverages Internet of Things (IoT) in Heterogeneous cellular networks (HetNets) [1,2,3]. The network operators are looking for more flexible and advanced network topologies, to satisfy user demands [2]
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