Browsing Engineering, Built Environment and Information Technology by UP Author "Alfa, Attahiru Sule"
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Browsing Engineering, Built Environment and Information Technology by UP Author "Alfa, Attahiru Sule"
Now showing items 1-20 of 36
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Liu, Renbin; Alfa, Attahiru Sule; Yu, Miaomiao (Springer, 2019-06)In this paper, we consider a discrete-time Geo/G/1 queue controlled by the combination of the N and D policies (called ND-policy). In this system, when there are N waiting customers or the service time backlog of all waiting ...
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Darchinimaragheh, Kamaloddin; Alfa, Attahiru Sule (Institute of Electrical and Electronics Engineers, 2015-05)Molecular communication is a nanoscale communication method in which information is encoded in molecules. Molecular communication using microtubules in free space is one of the realistic scenarios proposed for this type ...
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Farazmand, Yalda; Alfa, Attahiru Sule (Wiley, 2016-06)In this paper, a game theoretic relay load balancing and power allocationscheme is proposed for downlink transmission in a decode-and-forward orthogonal frequency division multiple access-based cellular relay network. A ...
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Mafuta, Armeline D.; Maharaj, Bodhaswar Tikanath Jugpershad; Alfa, Attahiru Sule (Institute of Electrical and Electronics Engineers, 2023-03)Resource allocation (RA) has a significant impact on vehicular network performance. With high mobility, RA is more challenging, as the number of vehicles in close proximity changes dynamically in the nonstationary environment. ...
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Grum, M.; Bender, B.; Alfa, Attahiru Sule; Gronau, N. (Elsevier, 2018-08)Faced with the increasing needs of companies, optimal dimensioning of IT hardware is becoming challenging for decision makers. In terms of analytical infrastructures, a highly evolutionary environment causes volatile, ...
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Osanaiye, Opeyemi; Alfa, Attahiru Sule; Hancke, Gerhard P. (Institute of Electrical and Electronics Engineers, 2018-01)Wireless sensor networks (WSN) over the years have become one of the most promising networking solutions with exciting new applications for the near future. Its deployment has been enhanced by its small, inexpensive and ...
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Alfa, Attahiru Sule; Pla, V.; Martinez-Bauset, J.; Casares-Giner, V. (Elsevier, 2016-04)Sensing is one of the most challenging issues in cognitive radio networks. Selection of sensing parameters raises several tradeoffs between spectral efficiency, energy efficiency and interference caused to primary users ...
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Pla, Vincent; Alfa, Attahiru Sule; Martinez-Bauset, Jorge; Casares-Giner, Vicente (Hindawi Publishing, 2019-01)Sensing is a fundamental aspect in cognitive radio networks and one of the most complex issues. In the design of sensing strategies, a number of tradeoffs arise between throughput, interference to primary users, and ...
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Okegbile, S.D. (Samuel); Maharaj, Bodhaswar Tikanath Jugpershad; Alfa, Attahiru Sule (Institute of Electrical and Electronics Engineers, 2020-11)Malicious users (MUs) have the tendency to disrupt the activities of honest users in the network if not properly controlled. In a massive cognitive radio network (CRN) with priority queues, malicious secondary users (SUs) ...
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Angwech, Otim Patricia; Alfa, Attahiru Sule; Maharaj, Bodhaswar Tikanath Jugpershad (Elsevier, 2022-11)Wireless sensor networks face many challenges, the major one being energy. Batteries are the main source of energy for the sensor nodes. When the battery is depleted, it must either be charged or replaced. This may be ...
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A maximum throughput channel allocation protocol in multi-channel multi-user cognitive radio network Wang, Shi; Maharaj, Bodhaswar Tikanath Jugpershad; Alfa, Attahiru Sule (Korean Institute of Communications and Information Sciences and IEEE Communications Society, 2018-04)Channel allocation protocol plays a crucial role in ensuring that cognitive radio technology achieves more efficient radio resource utilization. To evaluate and compare the performance of different channel allocation ...
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Alfa, Attahiru Sule; Maharaj, Bodhaswar Tikanath Jugpershad; Lall, Shruti; Pal, Sougata (Institute of Electrical and Electronics Engineers, 2016-10)For about the past decade and a half research efforts into cognitive radio networks (CRNs) have increased dramatically. This is because CRN is recognized as a technology that has the potential to squeeze the most out ...
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Awoyemi, Babatunde Seun; Alfa, Attahiru Sule; Maharaj, Bodhaswar Tikanath Jugpershad (Hindawi, 2018-04-03)Network failures are undesirable but inevitable occurrences for most modern communication and computing networks. A good network design must be robust enough to handle sudden failures, maintain traffic flow, and restore ...
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Awoyemi, Babatunde Seun; Alfa, Attahiru Sule; Maharaj, Bodhaswar Tikanath Jugpershad (Institute of Electrical and Electronics Engineers, 2019-09)This paper investigates highly efficient network restoration models for wireless sensor networks (WSNs) to be deployed for next-generation (xG) applications. The developed network restoration models are designed with two ...
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Kim, Tae Ok; Devanarayana, Chamara N.; Alfa, Attahiru Sule; Choi, Bong Dae (Institute of Electrical and Electronics Engineers, 2015-06)We investigate optimal call admission control (CAC) policy for multicast streaming services (MSS) in 3rd generation (3G) and beyond wireless mobile networks. Several MSS sessions are supported simultaneously in a ...
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Liu, Renbin; Alfa, Attahiru Sule; Yu, Miaomiao (EDP Sciences, 2019-07)In this paper, we consider two types of power consumption control policies for the long lifetime of wireless sensor node based on the discrete-time Geo/G/1 queue. One is the max(N, D)-policy, which triggers transmission ...
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Awoyemi, Babatunde Seun; Maharaj, Bodhaswar Tikanath Jugpershad; Alfa, Attahiru Sule (Elsevier, 2017-03)Cognitive Radio Networks (CRN) are currently gaining immense recognition as the most-likely next-generation wireless communication paradigm, because of their enticing promise of mitigating the spectrum scarcity ...
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Tsimba, Hilary Mutsawashe; Maharaj, Bodhaswar Tikanath Jugpershad; Alfa, Attahiru Sule (Wiley, 2020-03)Cognitive radio networks have achieved higher efficiency in terms of spectrum usage; however they do not readily solve any competition for access among secondary users. Optimisation is applied to an underlay network to ...
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Ibrahim, Ahmed; Alfa, Attahiru Sule (MDPI Publishing, 2017-08-01)This paper is intended to serve as an overview of, and mostly a tutorial to illustrate, the optimization techniques used in several different key design aspects that have been considered in the literature of wireless ...
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Ibrahim, Ahmed; Alfa, Attahiru Sule (Hindawi Publishing, 2019-08-29)High-altitude platforms (HAPs) are quasi-stationary aerial wireless communications platforms meant to be located in the stratosphere, to provide wireless communications and broadband services. They have the ability to fly ...
Now showing items 1-20 of 36