International Journal of Mobile Network Design and Innovation
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International Journal of Mobile Network Design and Innovation (4 papers in press)
Algorithm for decision of vertical handover in femto environment by Siddharth Goutam, Srija Unnikrishnan Abstract: Next Generation Networks are heterogeneous in nature due to presence of various Radio Access Technologies (RATs). Hence seamless mobility of users can be achieved by Vertical Handover. The main aim of this research paper is to design and implement an algorithm for making decision for handover in femto environment. The algorithm is designed using fuzzy logic, considering Received Signal Strength, Channel Capacity, Velocity of User, Number of users latched, Latency and Jitter. The decision to perform handover between femto cell and macro cell is presented. We have considered two scenarios i.e. handover from femto cell to femto cell and handover from macro cell to femto cell. Keywords: Vertical Handover (VHO); Vertical Handover Decision Algorithm (VHDA); Heterogeneous Wireless Networks; Received Signal Strength (RSS); Channel Capacity; Fuzzy Logic; Universe of Discourse.
Designing and Assessment of a Full Duplex MAC Protocol for HEW Networks with Asymmetric Traffic by Mohand MOKTEFI, Mohand YAZID, Louiza Bouallouche-Medjkoune, Chafik Akmouche Abstract: Wireless Local Area Networks (WLANs) based on IEEE 802.11rnstandard have been very popular in recent years due to their ability to offer mobility, flexibility and ease of use, with very low installation and maintenance costs. This has resulted in massive deployment of WLANs in geographically limited environments that encompass multiple overlapping BSS (Basic Service Set). In this paper, we are interesting to IEEE 802.11ax, a new standard developed by the IEEE 802.11 working group, which will enable very high data rates and efficient use of the spectrum. We particularly focus on one of the key solutions of this new amendment allowing to take full advantage of the space resources, namely, the Full Duplex (FD) radio communications. The main goal of this paper is proposing a new Full Duplex MAC protocol aiming at efficiently managing the Opportunity Window (OW) resulting from the asymmetry of the Down-Link (DL) and Up-Link (UL) traffics, since the DL traffic is usually much bigger than the UL traffic. The proposed Full Duplex protocol is designed for next-generation OFDMA-based (Orthogonal Frequency-Division Multiple Access) WLANs, which extends simultaneous transmission capabilities as much as possible and resolves conflicts with the minimum over-cost. The simulation results obtained show that the proposed protocol offers superior performance over existing protocols in a dense IEEE 802.11ax network environment. Keywords: High Efficiency WLANs; IEEE 802.11ax Standard; Full Duplex Radio Communications; Asymmetric DL and UL Traffic; Simulation and Assessment.
Frequency Domain Preamble-Based Channel Estimation and Equalization in LoRa by Vincent Savaux, Patrick Savelli Abstract: This paper deals with multipath channel estimation and equalization in LoRa. It is suggested to take advantage of the cyclic property of the symbols in the LoRa frame preamble to obtain an interference-free version of the symbols in the frequency domain. Then, estimation methods used in multicarrier systems can be applied, such as the least square (LS), and the minimum mean square error (MMSE) estimators. It is shown that the cyclic property in LoRa is inherently independent of the length of the channel, making these estimation techniques robust to any frequency-selective channel. In addition the frequency domain zero-forcing (ZF) equalizer is used, and an original phase equalizer is introduced, taking advantage of the constant modulus property of LoRa symbols in the frequency domain. The performance of the investigated estimators and equalizers is shown through simulations, and applications to the presented results are further discussed. Keywords: LoRa; Channel Estimation; Equalization; Least Square; Minimum mean square error; Zero forcing.
Improving Wireless and Networking Cybersecurity Curriculum by Edward Glantz, Mahdi Nasereddin, Joanne Peca, David Fusco, Devin Kachmar Abstract: This investigation expands previous work responding to the growing need to educate and train cyber professionals of wireless and networking devices by guiding cyber education curricular development in undergraduate and masters degree programs. In the haste to expand cyber curriculum, important considerations to improve student learning may be overlooked, resulting in less effective and satisfying experiences. Enhancing effectiveness of the learner experience may leverage not just what, but also how, content is delivered. The result integrates minds-on with hands-on learning. This paper is authored by cyber faculty at a university that recently expanded undergraduate and masters cybersecurity programs to cover wired and wireless cyber curriculum. This initiative supplemented theoretical education with development of hands-on experiential learner experiences across the curriculum Keywords: cybersecurity; wireless networking education; student learning; reflection; Kolb’s experiential learning cycle.