Dispersed beamforming approach for secure communication in UDN
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Dispersed beamforming approach for secure communication in UDN Garima Chopra1 • Rakesh Kumar Jha1 • Sanjeev Jain2
Springer Science+Business Media, LLC, part of Springer Nature 2019
Abstract Wireless communication systems are prone to many security breaches due to open nature of the medium and exponential a rise in subscribers. Hence, physical layer security (PLS) has emerged as one of the dominant low complexity alternatives to overcome the impact of eavesdropping by managing the physical characteristics of the medium. In this paper, we ensure PLS to moving users which tends to experience rise in handover, as a result of proximity between users and base station. This study is based on ultra-dense network (UDN). To tackle this challenge, novel secure beamforming named as beam broadening and beam merging have been proposed. Besides, we propose a synchronization approach called synchronized mobility clustering for UDN to reduce the overheads generated due to the exchange of information about moving users. More specifically, we derive an analytical expression for secrecy outage probability—an important security metric. The effect of proposed approaches have been validated through numerical results and the results show the effectiveness of the proposed approaches against eavesdropping. Finally, the performance of the proposed scheme is evaluated and compared with the conventional beamforming approach. However, this proposed approach works well for a varied density of users and location to be targeted. Keywords Beamforming Security UDN SNR Beam merging Beam broadening Secrecy outage probability
1 Introduction Recently, there has been a significant progress and magnificent increase in demand for multi-media services in the domain of wireless communications. According to CISCO white paper, 5G PPP will support 1000 times wireless capacity, connects 7 billion people, and 7 trillion ‘‘things’’ saving up to 90% energy [1]. Hence, the future generation networks are expected to support such massive connections and exponential rising users conjointly, which makes security a captious issue [2, 3].
& Rakesh Kumar Jha [email protected] Garima Chopra [email protected] Sanjeev Jain [email protected] 1
School of Electronics and Communication Engineering, Shri Mata Vaishno Devi University, Katra, J&K, India
2
IIITDM Jabalpur, Katra, J&K, India
Many prevailing techniques are presented until now to gratify the skyrocketed traffic demand suitably due to increased connection demands and crowded services. These techniques are categorized on the basis of following aspects: spectrum expansion (millimeter-wave), spectrum efficiency (massive Multiple-input multiple output, MIMO), Device-to-device (D2D) [4] and network densification [5]. Among these, the densification emerges as one of the dominant approaches to satisfy the ever-increasing data hunger of users, with the assimilation of D2D users, Massive MIMO, etc. Such crowded places like malls, Residential a
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