Towards UAV Assisted 5G Public Safety Network

Ensuring ubiquitous mission-critical public safety communications (PSC) to all the first responders in the public safety network is crucial at an emergency site. The first responders heavily rely on mission-critical PSC to save lives, property, and national infrastructure during a natural or human-made emergency. The recent advancements in LTE/LTE-Advanced/5G mobile technologies supported by unmanned aerial vehicles (UAV) have great potential to revolutionize PSC. However, limited spectrum allocation for LTE-based PSC demands improved channel capacity and spectral efficiency. An additional challenge in designing an LTE-based PSC network is achieving at least 95% coverage of the geographical area and human population with broadband rates. The coverage requirement and efficient spectrum use in the PSC network can be realized through the dense deployment of small cells (both terrestrial and aerial). However, there are several challenges with the dense deployment of small cells in an air-ground heterogeneous network (AG-HetNet). The main challenges which are addressed in this research work are integrating UAVs as both aerial user and aerial base-stations, mitigating inter-cell interference, capacity and coverage enhancements, and optimizing deployment locations of aerial base-stations. First, LTE signals were investigated using NS-3 simulation and software-defined radio experiment to gain knowledge on the quality of service experienced by the user equipment (UE). Using this understanding, a two-tier LTE-Advanced AG-HetNet with macro base-stations and unmanned aerial base-stations (UABS) is designed, while considering time-domain inter-cell interference coordination techniques. We maximize the capacity of this AG-HetNet in case of a damaged PSC infrastructure by jointly optimizing the inter-cell interference parameters and UABS locations using a meta-heuristic genetic algorithm (GA) and the brute-force technique. Finally, considering the latest specifications in 3GPP, a more realistic three-tier LTE-Advanced AG-HetNet is proposed with macro base-stations, pico base-stations, and ground UEs as terrestrial nodes and UABS and aerial UEs as aerial nodes. Using meta-heuristic techniques such as GA and elitist harmony search algorithm based on the GA, the critical network elements such as energy efficiency, inter-cell interference parameters, and UABS locations are all jointly optimized to maximize the capacity and coverage of the AG-HetNet

Advance Fee Fraud on the Increase: The Shield of Support Over the Victims

This research study addresses the activities of Advance Fee Fraudsters whose activities sometimes impact the status and life of their victims. Research to date appears to have focused on crime, Advance Fee Fraud, and its techniques. The intent of this study is to take the reader through the various types of Advance Fee Fraud (AFF) with special attention to how the victims may get help, an aspect of AFF that has been greatly neglected by previous researchers who mainly focus on the techniques and modus operandi of the fraudsters. Until recently, the concept of AFF was limitedly known, but with the advancement in technology, the concept has become very popular and sophisticated in its techniques. Though a qualitative research model will guide my investigation, I will not be limited in scope by finding useful materials for the study. The reason is that, for a social ill that has so much ravaged the global financial institutions and the finances of governments, corporations, and individuals, no one system will be able to bring to bear what is sought in proffering solutions to the menace. This research will be guided by a theoretical framework consisting of the problem statement, the purpose, the significance, and the research questions. The goal is to determine which types of AFF are more popular and employed, and which of them victims easily fall prey to. This will enable the researcher to access ways of helping the vulnerable citizens, treat, and support those already exposed, prevent revictimization, find how to put in place the required preventive actions, and how justice can be secured for victims of fraud. The data for the study will be obtained through qualitative interviews, and the transcripts of the interview material will be analyzed for emerging themes. It is my hope that the study will be helpful in enabling this research to fill the gap that has been created by previous research, finding help and support for victims