Securing Localization With Hidden and Mobile Base Stations

Abstract — Until recently, the problem of localization in wireless networks has been mainly studied in a non-adversarial setting. Only recently, a number of solutions have been proposed that aim to detect and prevent attacks on localization systems. In this work, we propose a new approach to secure localization based on hidden and mobile base stations. Our approach enables secure localization with a broad spectrum of localization techniques: ultrasonic or radio, based on received signal strength or signal time of flight. Through several examples we show how this approach can be used to secure node-centric and infrastructurecentric localization schemes. We further show how this approach can be applied to secure localization in sensor networks. I

Health Hazards Associated with Electric and Magnetic Field Intensities around Mobile Base Stations in Katsina State, Nigeria

This work was carried out to assess the health hazards associated with exposure to radiofrequency electromagnetic fields from mobile base stations (MBS) within Katsina, Nigeria. Seventy seven MBS were identified through reconnaissance survey. Received radiated power was measured at a distance of 0, 20, 40, 60 and 80m from the MBS using a handheld B and K precision spectrum analyser. Electric and magnetic field intensities (E and H) were calculated. E (mV/m) and H (μA/m) had average values of; 21.03 and 55.78 for MTN; 9.41 and 24.96 for GLO; 2.33 and 6.18, for Etisalat; 18.32 and 48.62 for Airtel. Our results indicated that the general public exposure from radiofrequency electromagnetic radiation from all the considered mobile base stations is within the acceptable threshold of 61 V/m for Electric field intensity and 0.16A/m for Magnetic field intensity. Keywords: Mobile base stations, Radiation, Katsina, Health hazard, Electric field, Magnetic fiel

Analysis of hierarchical cellular networks with mobile base stations

In this paper. we develop and evaluate a hierarchical cellular architecture for totally mobile wireless networks (TMWNs). Extensive performance tests were conducted to evaluate the performance of a two-tier system and compare its throughput, handoff blocking rate and new call success rate with those obtained by a one-tier model. Our tests have shown that when the total number of channels is kept the same, the two-tier system outperformed the one-tier counterpart under all load conditions. Under the constraint of equal power consumption, the two-tier system still achieved improvement over the one-tier system. especially at light and medium load levels. The improvement of the two-tier system over the one-tier system was observed to diminish as the degree of randomness in the mobility model is reduced scenarios where the one-tier system outperforms the two-tier system are given. Load balancing schemes based on the concept of reversible handoffs are introduced and their performance improvements are analyzed. Comparison results on the percentage of terminal coverage are presented. An analytical model to compute the new call and handoff blocking probabilities in TMWN is given and evaluated. The model extends the Markov chain approach previously used in hierarchical architectures with stationary base stations and uses a corrected derivation for the handoff blocking probability

Optimal deployment of UAV based Mobile Base Stations in emergency scenarios

In this traineeship, we will investigate the main challenges when a car is merging onto a lane of cars in a safe and efficient manner.In emergency scenarios where ground base stations are no longer available, Unmanned aerial vehicles (UAVs) based mobile base stations (MBS) can provide a good solution to provide coverage to the ground terminals in the affected area thanks to their versatility and affordability. The objective of this work is to study how these MBS can be deployed in the affected area minimizing the number of devices deployed at the same time than maximizing the coverage of every single user. We based our placement on an spiral algorithm path from the edge users towards the area center by minimizing the power consumption of each device and the interference in the MBS network. Once the MBS is already placed, we optimized the power consumption by making use of multi-antenna techniques to generate directional beams introducing the Non-Orthogonal Multiple Access (NOMA) technique, a promising technology in the upcoming fifth generation (5G). Finally, numerical results show how our algorithm improves the performance of the previous one in terms of quality of service (QoS) of the ground user

Surveying service at buliding mobile base stations

In this research we present surveying procedures which we have to do if we want to place the buildings of the mobile base station and to entry them into official records. In the first part we represent procedures which are equal for both, mobile base stations and also for other similar buildings of the public infrastructure. These are procedures of getting the ownership or getting the right to use the parcel on which the buildings of public infrastructure are build. These procedures also include getting the building permit, setting out the buildings, making surveying plans, getting operating permit and to evident the buildings into land cadastre and into cadastre of public infrastructure. We have also included the law backgrounds which are important for making those procedures. In second part of our research we present the practical procedures of building the mobile base station Voklo. First we show the procedures of getting the data about parcels, their owners and making easement contracts. Further on we introduced procedures and samples of surveying plans, report of setting out, the procedures of modifications and report of entrying the base station Voklo into official records