EAI Endorsed Transactions on Mobile Communications and Applications

EAI Endorsed Transactions on Mobile Communications and Applications is an open access, peer-reviewed scholarly journal focused on all aspects of mobile communications theories, technologies, systems, and applications. The journal publishes research articles, review articles, commentaries, editorials, technical articles, and short communications with a triannual frequency. Authors are not charged for article submission and processing.

Editor(s)-in-Chief: Lin Yun, Vanlin Sathya, Vincent A. Cicirello and Arianna D'Ulizia

Aims & Scope
Indexing
Editorial Board
Special Issues

EAI Endorsed Transactions on Mobile Communications and Applications is an open-access, a peer-reviewed scholarly journal focused on all aspects of mobile communications theories, technologies, systems, and applications. The journal publishes research articles, review articles, commentaries, editorials, technical articles, and short communications with a triannual frequency. Authors are not charged for article submission and processing.

Mobile cellular networks
Mobile ad hoc networks
Mobile Internet
WiMAX networks
Vehicular networks
Wireless sensor networks
Satellite communications systems
Mobile system and network architectures
Network control and management
Self-organizing, self-aware, and self-adaptive networks
Mobility management
Modulation and coding techniques
Quality of service
Reliability and fault tolerance
Trust, security and privacy
Mobile applications and services
Performance modelling and analysis
Spectrum sensing algorithm and white space modeling
Spectrum sharing architecture and mechanism
Spectrum-efficient design
Dynamic spectrum management
Spectrum pricing, auction, and trading a
Game theory for dynamic spectrum access
Spectrum mobility control
Reconfigurable wireless platforms
Medium access control design for cognitive radio networks
Spectrum agile and adaptive routing
Security of wireless systems in the context of spectrum sharing
Interference analysis, measurements, and statistical models of spectrum usage
Information-theoretic aspects of next-generation mobile systems
Coexistence with legacy wireless systems
Novel radio architectures and antennas
Simulation tools, testbeds, hardware, and software prototypes
Regulation and standardization
Artificial intelligence and machine learning for mobile communications
Energy-efficiency design in mobile communication systems
Mobile big data analytics
Mobile communications for the Internet of Things (IoT)
Applications enabled by mobile communication systems

Call for Papers: Special issue on: Improving the Security and Privacy Policies through Artificial Intelligence for NextGen (6G) Mobile Networks (Manuscript submission deadline: 2021-09-30; Notification of acceptance: 2021-11-18; Submission of final revised paper: 2022-01-10; Publication of special issue (tentative): 2021-07-30)

Guest Editor: Dr Basim Alhadidi, PhD. Khalaf (Al-Balqa Applied University, Jordan) Guest Editor: Dr Hong Jer Lang (Taylor's University, Malaysia) Guest Editor: Dr A M Viswa Bharathy, M.E., Ph.D. (JNTUH University, India)

Dr. Nirwan Ansari (Department of Electrical and Computer Engineering, New Jersey Institute of Technology, USA)
Dr. Raj Jain (Department of Computer Science and Engineering, Washington University in St. Louis, USA)
Dr. Tigang Jiang (UESTC)
Dr. Nei Kato (Graduate School of Information Sciences, Tohoku University, Japan)
Dr. Tiffany Jing Li (Department of Electrical and Computer Engineering, Lehigh University, USA)
Dr. Tommaso Melodia (Department of Electrical Engineering, State University of New York at Buffalo, USA)
Dr. Claude Oestges (Microwave Laboratory, Université catholique de Louvain (UCL), Belgium)
Dr. Kostas Pentikousis (European Research Centre, Huawei Technologies, Germany)
Dr. Charles E. Perkins (WiChorus Inc., USA)
Dr. Martin Reisslein (Department of Electrical Engineering, Arizona State University, USA)
Dr. David Simplot-Ryl (Fundamental Computer Science Laboratory, Centre de recherche INRIA Lille,
Dr. Wenye Wang (Department of Electrical and Computer Engineering, North Carolina State University, USA)
Dr. Baoxian Zhang (Graduate University, Chinese Academy of Sciences, China)
Dr. Cristian Borcea (NJIT)
Dr. Paolo Bellavista (University of Bologna)
Dr. Jian Ren (Michigan State University)
Dr. Lei Chen (Georgia Southern University)
Dr. Houbing Song (Embry-Riddle Aeronautical University)
Dr. Dalei Wu (The University of Tennessee at Chattanoog, USA)
Dr. Jianjun Yang, Department of Computer Science, University of North Georgia, USA
Dr. Qing Yang (University of North Texas)
Dr. Shaoen Wu (Ball State University, USA)
Dr. Dapeng Wu (Chongqing University of Posts and Telecommunications)
Dr. Ruoling Zhou, Department of Electrical and Computer Engineering, University of Massachusetts Dartmouth, USA
Dr. Ashutosh Kumar Dubey, Chitkara University, India
Brij Bhooshan Gupta, National Institute of Technology Kurukshetra, India
Dr. Anand Nayyar, Duy Tan University, Vietnam
Prof. Wen-Cheng Lai, National Penghu University of Science and Technology, Vietnam
Dr A M ViswaBharathy, Malla Reddy College of Engineering and Technology, India
Bo Li, Harbin Institute of Technology at Weihai, China
Klaus Moessner, University of Surrey, UK
Murat Kuscu, Koc University, Turkey
Xuanheng Li, Dalian University of Technology, China

Recently Published
Most Popular

Millimeter Wave Cellular Communication Performances and Challenges: A Survey
Appears in:
mca 22(21): e5

Authors:
Arebu Dejen, Murad Ridwan, Jaume Anguera, Jeevani Jayasinghe

Published:
8th Aug 2022

Abstract:
The demand for high data rates, combined with the exponential growth of mobile data trafficking, and has prompted the use of millimeter-wave (mm-wave) spectrum for 5G mobile communication. So, for constructive assessment, this study employed various research publications, institutional reports, and…The demand for high data rates, combined with the exponential growth of mobile data trafficking, and has prompted the use of millimeter-wave (mm-wave) spectrum for 5G mobile communication. So, for constructive assessment, this study employed various research publications, institutional reports, and other materials given at the conference. This survey article investigates the features of the mm-wave propagation channel and highlights the main challenges, solutions, and benefits associated with their utilization, as well as an analysis of their performance. The researchers observed that by reducing the difficulties and significant losses with various strategies, mm-wave cellular communication may extend up to 200m in a single cell and densification is essential for vast area coverage. The article also examines the right technical implementation approach, as well as the economic benefits and existing and predicted market situation of mm-wave cellular communication from the operator’s perspective. The outcome will be useful information for any operator or stakeholder in mm-wave communication.
more »
A Churn Prediction System for Telecommunication Company Using Random Forest and Convolution Neural Network Algorithms
Appears in:
mca 22(21): e4

Authors:
Sulaiman Olaniyi Abdulsalam, Jumoke Falilat Ajao, Bukola Fatimah Balogun, Micheal Olaolu Arowolo

Published:
27th Jul 2022

Abstract:
INTRODUCTION: Customer churn is a severe problem of migrating from one service provider to another. Due to the direct influence on the company's sales, companies are attempting to promote strategies to identify the churn of prospective consumers. Hence it is necessary to examine issues that influen…INTRODUCTION: Customer churn is a severe problem of migrating from one service provider to another. Due to the direct influence on the company's sales, companies are attempting to promote strategies to identify the churn of prospective consumers. Hence it is necessary to examine issues that influence customer churn to yield effective solutions to minimize churn.

OBJECTIVES: The major purpose of this work is to create a model of churn prediction that assists telecom operatives to envisage clients that are more probably to be prone to churn.

METHODS: The experimental strategy for this study leverages the machine learning techniques on the telecom churn dataset, employing an improved Relief-F feature selection algorithm to extract related features from the enormous dataset.

RESULTS: The result demonstrates that CNN has a high prediction capability of 94 percent compared to the 91 percent Random Forest classifier.

CONCLUSION: The results are of enormous relevance to the telecommunication business in improving churners and loyal clients.
more »
BER Performance of NOMA Downlink for AWGN and Rayleigh Fading Channels in (SIC)
Appears in:
mca 22(21): e3

Authors:
Mohamed Hassan, Manwinder Singh, Khalid Hamid

Published:
20th Jun 2022

Abstract:
Non-orthogonal multiple access (NOMA) is a great option for an upcoming radio access network due to its ability to provide enormous connections and high spectral efficiency. However, NOMA's primary issue is the error with successive interference cancellation (SIC). This paper aims to examine bit er…Non-orthogonal multiple access (NOMA) is a great option for an upcoming radio access network due to its ability to provide enormous connections and high spectral efficiency. However, NOMA's primary issue is the error with successive interference cancellation (SIC). This paper aims to examine bit error rate (BER) downlink (DL) NOMA power domain (PD) for various SNR levels in additive white Gaussian noise (AWGN) as well as in Rayleigh fading channels utilizing Quadrature Phase Shift Keying (QPSK) for three different scenarios, to clearly differentiate the more effect of distance, bandwidth (BW), and power location coefficients factors using the MATLAB simulation software program. The BER versus SNR results were obtained in terms of charts for different BWs, distances, and power location coefficients. According to the findings, the BW parameter has the strongest effect on BER DL NOMA PD when compared to the distance, and power location coefficient parameters.
more »
Performance Analysis of RACODSR Protocol in Smart Grayhole Attacks on VANets
Appears in:
mca 22(21): e2

Authors:
Kaoutar Ourouss, Najib Naja, Abdellah Jamali

Published:
1st Jun 2022

Abstract:
As a subclass of Mobile Adhoc Networks (MANets), Vehicular Ad Hoc Network (VANET) is a set of interconnecting vehicles that aim to provide a wide spectrum of encouraging road services, such as safety and traffic management. This key component of Intelligent Transportation Systems (ITS), is impacted…As a subclass of Mobile Adhoc Networks (MANets), Vehicular Ad Hoc Network (VANET) is a set of interconnecting vehicles that aim to provide a wide spectrum of encouraging road services, such as safety and traffic management. This key component of Intelligent Transportation Systems (ITS), is impacted by the vehicle’s mobility and suffers from frequent link disruptions caused voluntarily or intentionally by malicious attackers, which make the security issue more challenging and even life-threatening when critical attacks occurred. This work focuses on analyzing the smart grayhole attacks within VANets environments and evaluating the Reputation-based Ant Colony Optimization Dynamic Source Routing (RACODSR) and Dynamic Source Routing (DSR) protocols performances under two different scenarios. For this purpose, VANets mobility models with and without collisions are generated using OpenStreetMap and Simulation of Urban Mobility (SUMO) tools and simulated in Network Simulator NS2 to assess the effectiveness of the compared protocols using the Drop rate, Packet Delivery Ratio, Throughput, Jitter, End-to-End delay, and consumed energy metrics.
more »
Survey on D2D Resource Scheduling and Power Control Techniques: State-of-art and Challenges
Appears in:
mca 22(21): e1

Authors:
Abi A. Dejen, Yihenew Wondie, Anna Förster

Published:
4th May 2022

Abstract:
Device to Device (D2D) communication has emerged as the most promising paradigm for optimizing spectral and energy efficiency, reliability as well as increasing network throughput in the emerging cellular generation. D2D resource optimization scheme has been thoroughly investigated in the literatur…Device to Device (D2D) communication has emerged as the most promising paradigm for optimizing spectral and energy efficiency, reliability as well as increasing network throughput in the emerging cellular generation. D2D resource optimization scheme has been thoroughly investigated in the literature to manage interference and enable its smooth integration into the future cellular network in recent years as an increasing number of papers are published each year. We believe systematic categorization of literature in the area will help readers to comprehend the strengths, weaknesses, and trends of the solution approach. However, a survey that discusses all aspects, requirements, and challenges of D2D resource optimization is largely missing. Hence, in this paper, we aim to develop a comprehensive survey that fills the gaps found in the previous literature. Based on the surveyed papers, it will figure out ideas that have been thoroughly explored and those that assume the potential for further research.
more »
Realistic Human Mobility Model for Opportunistic Networks
Appears in:
mca 22(20): e5

Author:
Abdolbast Greede

Published:
2nd May 2022

Abstract:
Within the opportunistic wireless network research community, the evaluation of a new network protocol depends almost entirely on simulation. Using simulation enables a researcher to test a wide variety of scenarios at a low cost compared to using a real system. In opportunistic networks, the mobi…Within the opportunistic wireless network research community, the evaluation of a new network protocol
depends almost entirely on simulation. Using simulation enables a researcher to test a wide variety of scenarios at a low cost compared to using a real system. In opportunistic networks, the mobility of users plays a key role in data delivery; therefore, the value of the validation of a data forwarding protocol is highly dependent on the mobility models used in the simulation. In this paper, popular mobility models are assessed. Based on this analysis, a novel mobility model “Realistic Human Mobility Model” (RHMM) is proposed. The performance of the RHMM is evaluated and compared with real traces. The results show that RHMM generates mobility patterns that present characteristics similar to real ones and it has the same statistical properties identified in the real human mobility patterns.
more »
Marker-based Tangible Interfaces for Smartphone-based Virtual Reality
Appears in:
mca 22(20): e4

Authors:
Jorge C. S. Cardoso, Jorge M. Ribeiro

Published:
11th Apr 2022

Abstract:
In this work, we describe an approach for tangible interaction for smartphone-based VR using visual markers. Smartphone-based VR represents a low barrier to entry given that many people nowadays own a smartphone device and that VR headsets for these devices are affordable and quick to set up when c…In this work, we describe an approach for tangible interaction for smartphone-based VR using visual markers. Smartphone-based VR represents a low barrier to entry given that many people nowadays own a smartphone device and that VR headsets for these devices are affordable and quick to set up when compared to desktop-based VR. Tangible interaction in smartphone-based VR has not been much explored, despite the fact that it can result in easy to use and engaging experiences. We explore a marker-based solution to object tracking that allows tangibles to be created in an easy and cheap way, maintaining the overall system accessible. We describe several types of interactions that can be created with visual markers and we present three prototypes of the
Tangible VR Book: a tangible with a book form-factor that we designed for architectural heritage exploration. We also present user feedback on their expectations regarding the interaction with the Tangible VR Book.
more »
Topology characterizing using packet forwarding distance dissimilarity in multi-greedy geographic routing
Appears in:
mca 22(20): e3

Authors:
G. Oladeji-Atanda, D. Mpoeleng

Published:
11th Jan 2022

Abstract:
Characterizing the topology of MANETs provides the means for packet routing protocols to perform adaptively and efficiently in the particular environments. We show that the geographic routing’s greedy packet forwarding distance dissimilarity distributions in relation to node size characterizes MA…Characterizing the topology of MANETs provides the means for packet routing protocols to perform adaptively and
efficiently in the particular environments. We show that the geographic routing’s greedy packet forwarding distance
dissimilarity distributions in relation to node size characterizes MANET topologies and supports efficient multi-greedy
forwarding. The models we described, based on the average greedy packet forwarding distance measures, showed distinct
distribution patterns of the dissimilarity indices when applied to the example multi-greedy routing environment consisting
of the ELLIPSOID and the GREEDY forwarding metrics. The scheme demonstrates the potential for adaptive forwarding
performance to improve successful packets delivery in environments of high node-size variations such as VANETs.
more »
Outage Performance of Underlay Multihop Cognitive Relay Networks with the use of the highest Power Beacon among Power Beacons
Appears in:
mca 22(20): e2

Author:
Nguyen Cong Danh

Published:
5th Nov 2021

Abstract:
This paper studies the outage performance of multihop cognitive relay networks with energy harvesting in underlay paradigms, wherein the secondary users are powered by a dedicated power beacon (PB) have the highest energy level among their power beacons and the interference constrain from the …This paper studies the outage performance of multihop cognitive relay networks with energy harvesting in underlay paradigms, wherein the secondary users are powered by a dedicated power beacon (PB) have the highest energy level among their power beacons and the interference constrain from the primary user. The author derived the exact outage probability for Rayleigh block fading and prove that the outage probability is monotonically decreasing with respect to the transmit power of PB. Furthermore, the author drew conclusions when the author compared the outage performance of the system in 3 cases: the system without using the beacon, the system using a power beacon, using a beacon with the highest energy level among power beacons. Simulation results validate the theoretical results.
more »
E-HMAC: An Efficient Secure Homomorphic MAC Scheme for NC-Enabled WSNs
Appears in:
mca 22(20): e1

Author:
Haythem Hayouni

Published:
29th Sep 2021

Abstract:
The main goal of Network Coding (NC) is to find an optimal transmission of data in a network. NC presents an advantage for wireless sensor networks (WSNs) in term of network lifetime. However, the Network Coding-enabled WSNs are affected by various attacks, such as pollution attacks. Many HMAC sc…The main goal of Network Coding (NC) is to find an optimal transmission of data in a network. NC presents an advantage for wireless sensor networks (WSNs) in term of network lifetime. However, the Network Coding-enabled WSNs are affected by
various attacks, such as pollution attacks. Many HMAC schemes have been proposed in the literature to secure packets against pollution attacks. In 2015, Esfahani et al. proposed a dual-homomorphic MAC scheme based to the construction of two different MACs to ensure the integrity of coded packets. Their solution has many weaknesses in terms of security against tag
pollution attacks. In this paper, we improve their scheme by proposing a novel HMAC scheme for NC enabled WSNs, called E-HMAC, based on multi-linear space to check the integrity of coded packets. The simulation results demonstrate the ability of our proposed scheme to secure the coded packets with a low key storage overhead and communication overhead, compared to Esfahani et al.’s scheme.
more »

Introducing a Distance Vector Routing Protocol for ns-3 Simulator
Appears in:
mca 16(8): e4

Authors:
Janaka Wijekoon, Rajitha Tennekoon, Erwin Harahap, Hiroaki Nishi

Downloads:
3180

Abstract:
In network research, network simulators have been shown to be useful for testing and changing network protocols by means of a controlled manner. As an Internet systems simulator, ns-3 simulator provides an ideal simulation environment for network research. However, ns-3 is lack of table-driven IPv4…In network research, network simulators have been shown to be useful for testing and changing network protocols by means of a controlled manner. As an Internet systems simulator, ns-3 simulator provides an ideal simulation environment for network research. However, ns-3 is lack of table-driven IPv4 routing modules. Despite the fact that a routing protocol is a mandatory component of a network, it is necessary to introduce a table-driven routing protocol for the ns-3 which is able to maintain the network connectivity and consistency. To this end, we introduce a distance vector IPv4 wired routing protocol for the ns-3 simulator (DVRP). The proposing protocol is developed as a table-driven wired routing protocol. In this study, we describe the proposing routing protocol, including its design, implementation, behavior on networks, and limitations.
more »
GNSSim: An Open Source GNSS/GPS Framework for Unmanned Aerial Vehicular Network Simulation
Appears in:
mca 15(6): e2

Authors:
Farha Jahan, Ahmad Y. Javaid, Weiqing Sun, Mansoor Alam

Downloads:
2682

Abstract:
Unmanned systems are of great importance in accomplishing tasks where human lives are at risk. These systems are being deployed in tasks that are time-consuming, expensive or inconclusive if accomplished by human intervention. Design, development and testing of such vehicles using actual hardware c…Unmanned systems are of great importance in accomplishing tasks where human lives are at risk. These systems are being deployed in tasks that are time-consuming, expensive or inconclusive if accomplished by human intervention. Design, development and testing of such vehicles using actual hardware could
be quite costly and dangerous. Another issue is the limited outdoor usage permitted by Federal Aviation Administration regulations, which makes outdoor testing difficult. An optimal solution to this problem is to have a simulation environment where different operational scenarios, newly developed models, etc., can
be studied. In this paper, we propose GNSSim, a Global Navigation Satellite System (GNSS) simulation framework. We demonstrate its effectiveness by integrating it with UAVSim. This allows users to experiment easily by adjusting different satellite as well as UAV parameters. Related tests and evidence of the correctness
of the implementation are presented.
more »
Route-Over Forwarding Techniques in a 6LoWPAN
Appears in:
mca 14(5): e5

Authors:
Andreas Weigel, Martin Ringwelski, Volker Turau, Andreas Timm-Giel

Downloads:
2038

Abstract:
6LoWPAN plays a major role within the protocol stack for the future Internet of Things. Its fragmentation mechanism enables transport of IPv6 datagrams with the required minimum MTU of 1280 bytes over 802.15.4-based networks. With the goal of a fully standardized WSN protocol stack currently nece…6LoWPAN plays a major role within the protocol stack for the future Internet of Things. Its fragmentation
mechanism enables transport of IPv6 datagrams with the required minimum MTU of 1280 bytes over
802.15.4-based networks. With the goal of a fully standardized WSN protocol stack currently necessitating a route-over approach, i.e., routing at the IP-layer, there are two main choices for any 6LoWPAN implementation with regard to datagram fragmentation: Hop-by-hop assembly or a cross-layered direct mode, which forwards individual 6LoWPAN fragments before the whole datagram has arrived. In addition to these two straightforward approaches, we propose enhancements based on adaptive rate-restriction for the direct forwarding and a retry control for both modes to reduce the number of losses of larger datagrams. An evaluation of these modes in a simulation environment and a hardware testbed indicate that the proposed enhancements can considerably improve PRR and latency within 6LoWPAN networks.
more »
Implementation of Cognitive Radio Network Testbed for Multimedia Communications
Appears in:
mca 18(15): e2

Authors:
Patrick DaSilva, Anuja Ghising, Siddharth Patil, Honggang Wang

Downloads:
1768

Abstract:
A cognitive radio is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not, and instantly move into vacant channels while avoiding occupied ones. This intelligently avoids interference amongst users and provides th…A cognitive radio is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not, and instantly move into vacant channels while avoiding occupied ones. This intelligently avoids interference amongst users and provides the ability to use up all available bandwidth on the RF spectrum. There are many ways in which the communication can be demonstrated. This paper examines how we have implemented a cognitive radio network testbed using software defined radios (SDRs) for multimedia communications, where components that have been traditionally implemented in hardware are instead implemented by means of software on a personal computer or embedded system to communicate and transfer a file between each other. We attempt to demonstrate potential use of SDRs for future multimedia applications.
more »
Automated control signal reception acknowledgement system using nRF24L01P wireless transceiver module and Arduino
Appears in:
mca 19(16): e3

Author:
Mobasshir Mahbub

Downloads:
1670

Abstract:
In this era of modern technology wireless control system is a most used method to control electrical or electronic devices and/or monitoring from a distant part. It is very easier and cost effective to implement a wireless system. Because there are barriers in implementing wired system. That is w…In this era of modern technology wireless control system is a most used method to control electrical or electronic
devices and/or monitoring from a distant part. It is very easier and cost effective to implement a wireless system.
Because there are barriers in implementing wired system. That is why wireless system is much effective than wired.
But the wireless system has also some problems or deficits. One of them is signal loss during the transmission due to
various causes like surrounding environmental reason and others. If transmitted signal is lost the receiver will remain
completely blind as it is not receiving the signal. Another one can be the receiver is unable to receive signal due to the
technical fault of receiver end whether the transmitted signal is stable. That is why an acknowledgement system is
necessary to determine whether the receiver is receiving the transmitted signal or not. The developed system is an
effective and low cost system with nRF24L01P transceiver module and Arduino Uno to determine that the receiver is
working accordingly or not or is there any technical fault.
more »
Simulating LTE Mobility Management in presence of coverage holes with ns-3
Appears in:
mca 16(8): e2

Authors:
Zoraze Ali, Nicola Baldo, Josep Mangues-Bafalluy, Lorenza Giupponi

Downloads:
1615

Abstract:
In this paper, we present our approach to simulate mobility management scenarios for LTE heterogeneous network deployments defined by challenging radio propagation scenarios, such as the presence of coverage holes. We focus on the LTE module of ns-3, which is also known as LENA. Our contribution i…In this paper, we present our approach to simulate mobility management scenarios for LTE heterogeneous network deployments defined by challenging radio propagation scenarios, such as the presence of coverage holes. We focus
on the LTE module of ns-3, which is also known as LENA. Our contribution is twofold. On one hand, we propose a set of new features for the LTE module, including a new model for simulating obstacles blocking the propagation of radio signals, and a handover model suitable for the offline
evaluation of mobility management solutions. On the other hand, we describe in detail the setup of the simulation scenario, highlighting the challenges that we faced during the implementation and discussing the chosen configuration parameters. Finally, we present some simulation results that
we obtained with the proposed approach.
more »
Optimal ZF Precoder for MU massive MIMO Systems over Ricean Channel with per Antenna Power Allocation
Appears in:
mca 18(15): e3

Authors:
James Kweku Nkrumah Nyarko, Christian Ango Mbom

Downloads:
1558

Abstract:
Multiuser massive multiple-input multiple-output systems have the potential to increase the data rate. However, with a large base station (BS) antenna, the non-square channel matrix restricts the zero-forcing (ZF) precoder rotations to obtain the best optimal solution with the per-antenna power all…Multiuser massive multiple-input multiple-output systems have the potential to increase the data rate. However, with a large base station (BS) antenna, the non-square channel matrix restricts the zero-forcing (ZF) precoder rotations to obtain the best optimal solution with the per-antenna power allocation. In this paper, we propose the beamforming and lattice reduction (LR) approach to restrain the channel matrix and transform the lattice of the channel vectors to be near orthogonal. Numerical results show that the LR-based ZF precoder outperforms other ZF precoder schemes, such as, the norm approximation of the beamforming matrix. In particular, the sum rate of the proposed optimal ZF precoder requires a small number of BS antenna. Subsequently, with the strong line of sight (LoS) channel, the optimal power allocations in the subchannels depend on the dominance of the users in order to achieve substantial multiplexing and diversity gains. Speciﬁcally, the Ricean channel gain with the water-ﬁlling allocation at high SNR is non-negligible.
more »
Towards autonomous vehicular clouds
Appears in:
mca 11(1): e2

Authors:
Stephan Olariu, Mohamed Eltoweissy, Mohamed Younis

Downloads:
1327

Abstract:
The dawn of the 21st century has seen a growing interest in vehicular networking and its myriad potential applications. The initial view of practitioners and researchers was that radio-equipped vehicles could keep the drivers informed about potential safety risks and increase their awareness of roa…The dawn of the 21st century has seen a growing interest in vehicular networking and its myriad potential applications. The initial view of practitioners and researchers was that radio-equipped vehicles could keep the drivers informed about potential safety risks and increase their awareness of road conditions. The view then expanded to include access to the Internet and associated services. This position paper proposes and promotes a novel and more comprehensive vision namely, that advances in vehicular networks, embedded devices and cloud computing will enable the formation of autonomous clouds of vehicular computing, communication, sensing, power and physical resources. Hence, we coin the term, autonomous vehicular clouds (AVCs). A key feature distinguishing AVCs from conventional cloud computing is that mobile AVC resources can be pooled dynamically to serve authorized users and to enable autonomy in real-time service sharing and management on terrestrial, aerial, or aquatic pathways or theaters of operations. In addition to general-purpose AVCs, we also envision the emergence of specialized AVCs such as mobile analytics laboratories. Furthermore, we envision that the integration of AVCs with ubiquitous smart infrastructures including intelligent transportation systems, smart cities and smart electric power grids will have an enormous societal impact enabling ubiquitous utility cyber-physical services at the right place, right time and with right-sized resources.
more »
Hybrid Satellite - Wireless Sensor Networks Architecture for Telemedicine Applications in the Context of Emergency Satellite Communications in Ku/Ka/Q/V Bands
Appears in:
mca 14(5): e1

Authors:
Rahim Kacimi, Ponia Pech

Downloads:
1313

Abstract:
Thanks to the facilities offered by telecommunications, telemedicine today allows physicians and clinicians to access, monitor and diagnose patients remotely. Telemedicine includes several applications such as remote monitoring of chronically ill patients, monitoring people in their everyday lives …Thanks to the facilities offered by telecommunications, telemedicine today allows physicians and clinicians to access, monitor and diagnose patients remotely. Telemedicine includes several applications such as remote monitoring of chronically ill patients, monitoring people in their everyday lives to provide early detection and intervention for various types of diseases, computer-assisted physical rehabilitation in ambulatory settings, and assisted living for the elderly at home, as well as remote monitoring of injured people in a post-disaster situation. These new applications require a reliable, wireless communication link between the devices implanted in the patient’s skin and a clinician. In this article, this issue is discussed and a list of performance criteria for the different communication links used are addressed, especially focusing on the satellite link. Then an adaptive air interface which is designed to meet the performance constraints of bidirectional satellite communication links in an emergency situation in Ku/Ka/Q/V bands where when strong channel impairments occur is described and analysed.
more »
A Privacy-Preserving NFC Mobile Pass for Transport Systems
Appears in:
mca 14(5): e4

Authors:
Ghada Arfaoui, Guillaume Dabosville, Sébastien Gambs, Patrick Lacharme, Jean-François Lalande

Downloads:
1298

Abstract:
The emergence of the NFC (Near Field Communication) technology brings new capacities to the next generation of smartphones, but also new security and privacy challenges. Indeed through its contactless interactions with external entities, the smartphone of an individual will become an essential auth…The emergence of the NFC (Near Field Communication) technology brings new capacities to the next generation of smartphones, but also new security and privacy challenges. Indeed through its contactless interactions with external entities, the smartphone of an individual will become an essential authentication tool for service providers such as transport operators. However, from the point of view of the user, carrying a part of the service through his smartphone could be a threat for his privacy. Indeed, an external attacker or the service provider himself could be tempted to track the actions of the user. In this paper, we propose a privacy-preserving contactless mobile service, in which a user’s identity cannot be linked to his actions when using the transport system. The security of our proposition relies on the combination of a secure element in
the smartphone and on a privacy-enhancing cryptographic protocol based on a variant of group signatures. In addition, although a user should remain anonymous and his actions unlinkable in his daily journeys, we designed a technique for lifting his anonymity in extreme circumstances. In order to guarantee the usability of our solution, we implemented a prototype demonstrating that our solution meets the major functional requirements for real transport systems: namely that the mobile pass can be validated at a gate in less than 300 ms, and this even if the battery of the smartphone is exhausted.
more »

Publisher: EAI
ISSN: 2032-9504
Number of Volumes: 7

Last Published: 2022-08-08