Hybrid journal (It can contain Open Access articles) ISSN (Print) 1744-2869 - ISSN (Online) 1744-2850 Published by Inderscience Publishers[451 journals]
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Authors:Siddharth Goutam, Srija Unnikrishnan Pages: 55 - 62 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 (VHO). 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 (RSS), 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: VHO; vertical handover; VHDA; vertical handover decision algorithm; heterogeneous wireless networks; RSS; received signal strength; channel capacity; fuzzy logic; universe of discourse Citation: International Journal of Mobile Network Design and Innovation, Vol. 10, No. 2 (2021) pp. 55 - 62 PubDate: 2021-11-16T23:20:50-05:00 DOI: 10.1504/IJMNDI.2021.118978 Issue No:Vol. 10, No. 2 (2021)
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Authors:Mohand Moktefi, Mohand Yazid, Louiza Bouallouche-Medjkoune, Chafik Akmouche Pages: 63 - 73 Abstract: Wireless local area networks (WLANs) based on the IEEE 802.11 standard have been very popular in recent years because of their ability to offer mobility, flexibility and ease of use, with very low installation and maintenance costs. In this paper, we focus on 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 spectrum. We are particularly interested in one of the key solutions in this new amendment, namely full duplex (FD) radio communications. The proposed full duplex protocol is designed for next-generation wireless LANs based on orthogonal frequency division multiple access (OFDMA), which extends the simultaneous transmission capabilities as much as possible and resolves contention with minimal overhead. The simulation results obtained show that the proposed protocol outperforms existing protocols in a dense IEEE 802.11ax network environment. Keywords: HEWs; high efficiency WLANs; IEEE 802.11ax Standard; full duplex radio communications; asymmetric DL and UL traffic; simulation and assessment Citation: International Journal of Mobile Network Design and Innovation, Vol. 10, No. 2 (2021) pp. 63 - 73 PubDate: 2021-11-16T23:20:50-05:00 DOI: 10.1504/IJMNDI.2021.118979 Issue No:Vol. 10, No. 2 (2021)
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Authors:Vincent Savaux, Patrick Savelli Pages: 74 - 81 Abstract: This paper deals with multipath channel estimation and equalisation in low range (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) equaliser is used, and an original phase equaliser is introduced, taking advantage of the constant modulus property of LoRa symbols in the frequency domain. The performance of the investigated estimators and equalisers is shown through simulations, and applications to the presented results are further discussed. Keywords: LoRa; low range; channel estimation; equalisation; least square; minimum mean square error; MMSE; zero forcing Citation: International Journal of Mobile Network Design and Innovation, Vol. 10, No. 2 (2021) pp. 74 - 81 PubDate: 2021-11-16T23:20:50-05:00 DOI: 10.1504/IJMNDI.2021.118986 Issue No:Vol. 10, No. 2 (2021)
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Authors:Edward J. Glantz, Mahdi Nasereddin, Joanne C. Peca, David J. Fusco, Devin Kachmar Pages: 82 - 89 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 master's 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 master's 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 Citation: International Journal of Mobile Network Design and Innovation, Vol. 10, No. 2 (2021) pp. 82 - 89 PubDate: 2021-11-16T23:20:50-05:00 DOI: 10.1504/IJMNDI.2021.118987 Issue No:Vol. 10, No. 2 (2021)
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Authors:Edward J. Glantz, Mahdi Nasereddin, Joanne C. Peca, David J. Fusco, Devin Kachmar Pages: 90 - 94 Abstract: A low complexity code synchronisation algorithm is proposed which accurately establishes the code synchronisation state for a polar code decoder using the belief value on a single frozen bit. The algorithm complexity is independent of the size of the polar code. To illustrate the performance of this algorithm, the theoretical and simulation results are presented for a (8, 4) and (16, 10) polar codes using binary phase shift keying (BPSK) over an additive white gaussian noise (AWGN) channel. The theoretical analysis overlays the simulation results accurately. For the (16, 10) polar code, the probability of a false-alarm can be controlled to range from 10<SUP align="right">-11</SUP> at 0 dB to 10<SUP align="right">-48</SUP> at 6 dB with the time to announce a loss of synchronisation that is independent of the channel SNR. This time can be limited to a near pre-selected number of frames if there is an early loss of synchronisation. Keywords: polar codes; code synchronisation; frame synchronisation; BPSK; binary phase shift keying; AWGN; additive white gaussian noise Citation: International Journal of Mobile Network Design and Innovation, Vol. 10, No. 2 (2021) pp. 90 - 94 PubDate: 2021-11-16T23:20:50-05:00 DOI: 10.1504/IJMNDI.2021.118988 Issue No:Vol. 10, No. 2 (2021)
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Authors:N. Santhana Krishna, K. Pradeepa Pages: 95 - 103 Abstract: Deploying mobile entities in wireless sensor network increases their lifespan manifolds as it is very efficient in handling the energy hole problem. Many methodologies and techniques have been adopted by various past research works to minimise the hotspot formation around the base station. Reducing the formation of hotspot has a direct impact on the longevity of sensor network, so more efforts and focus is laid on this particular research area. In this paper we propose a greedy heuristic protocol for data collection termed as GHPDC which greedily selects the energy rich spots for the mobile base station to sojourn. Apart from this the paper has also proposed a linear programming formulation (LPP) which optimises the base station stopping time which will have a direct impact on increasing the network lifetime. The linear programming formulation considers the residual energy of the sensor nodes to decide on the quantity of time for the base station to sojourn. Keywords: wireless sensor network; network lifetime; greedy heuristic protocol; mobile base station; optimised time; LPP; linear programming formulation; mobile sink; mobile cluster head Citation: International Journal of Mobile Network Design and Innovation, Vol. 10, No. 2 (2021) pp. 95 - 103 PubDate: 2021-11-16T23:20:50-05:00 DOI: 10.1504/IJMNDI.2021.118993 Issue No:Vol. 10, No. 2 (2021)
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Authors:K. Jisha, K. Pradeepa Pages: 104 - 112 Abstract: Utilising mobile entities in wireless sensor network is the recent research attraction because of its numerous benefits. The paper suggests on quadrant division of network and deployment of mobile data collectors in each quadrant. Each quadrant is assigned with multiple data collection points (DCPs) with an energy rich node designated as sink node. We propose a clustering algorithm for the sink node to form clustering trees for data collection from sensor nodes. We also optimise the trajectory path of the mobile data collector by using a linear programming formulation. The data collector travels along the optimised trajectory route to visit sink nodes at each DCP to aggregate the data. Simulations are done to measure the performance of the proposed algorithm in terms of network lifetime, average energy consumption, number of live and dead nodes. The proposed algorithm showcase a good performance in comparison with the existing schemes. Keywords: wireless sensor network; mobile data collector; sink; clustering; DCPs; data collection points; predetermined trajectory Citation: International Journal of Mobile Network Design and Innovation, Vol. 10, No. 2 (2021) pp. 104 - 112 PubDate: 2021-11-16T23:20:50-05:00 DOI: 10.1504/IJMNDI.2021.118989 Issue No:Vol. 10, No. 2 (2021)
Hybrid journal (It can contain Open Access articles)
[451 journals]
