Browsing by Author "Ayeni, Olumuyiwa B."
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Item A Collaborative Authentication Scheme For Intrusion Detection in Wireless Sensor Networks(Faculty of Communication and Information Science, University of Ilorin, 2014) Onidare, Samuel O.; Ayeni, Adeseko A.; Ayeni, Olumuyiwa B.; Adeniran, Temitayo C.Virtually all applications of WSN are critical infrastructures, yet they are characterized by low resource, making them a good and attractive target for network attackers. This necessitate the need for having an energy and resource optimizing security technology or mechanism that will ensure that WSN deployed for such infrastructures are secured at least to a degree from intrusion by malicious entities. Intrusion detection scheme (IDS) in wireless sensor networks (WSN) follows two main approaches namely; single sensing and multiple sensing. This paper presents an algorithm for a collaborative multiple sensor schemes that use the authentication of neighbour nodes and high level sensory data to detect a possible intrusion in a WSN. Besides using a collaborative multiple sensor schemes, the mechanism of the algorithm also incorporates a second layer of authentication which serves to increase the reliability and ruggedness of the proposed IDS. A simple demonstration of how the algorithm works was done through MATLAB simulation. Furthermore, a discussion of the effectiveness of the algorithm for several typical security attacks/threats against WSN was presented.Item A Frequency Planning Model for Spatial White Space in GSM Cellular Network(African Journal of Computing and ICT, 2015) Onidare, Samuel O.; Ayeni, Adeseko A.; Ayeni, Olumuyiwa B.; Ajagbe, Ajibola OThis work proposes a new approach to better utilization of the radio spectrum in the GSM 900 and 1800 Band, taking advantage of the cellular concept of the GSM radio and the cognitive driven dynamic spectrum access of the next generation wireless technology. The unused channels of a system, within the coverage area, of a particular cell, were identified as spectrum holes, and otherwise referred to as channel holes, in this paper. A model for this system-created, GSM spatial whitespace was formulated. Using the coverage radius of a cell, antenna directivity and other engineering parameters together with frequency planning map of a GSM operator in Ilorin, the capital city of Kwara state in Nigeria, a computation of potential available bandwidth within the coverage area of some GSM cells was done to demonstrate the model. The quantity of white space that can be recovered per cell, shows that there exists higher potential for secondary cognitive usage of the GSM 900 and 1800 band than claimed in reports of several, previous spectrum occupancy measurements. A comparison of the utilization level by this approach with some other works revealed a considerable increase in recoverable spectrum holes in the two GSM bands combined.Item A Frequency Planning Model for Spatial White Space in GSM Cellular Network(African Journal of Computing and ICT, 2015) Onidare, Samuel O.; Ayeni, Adeseko A.; Ayeni, Olumuyiwa B.; Ajagbe, Ajibola OThis work proposes a new approach to better utilization of the radio spectrum in the GSM 900 and 1800 Band, taking advantage of the cellular concept of the GSM radio and the cognitive driven dynamic spectrum access of the next generation wireless technology. The unused channels of a system, within the coverage area, of a particular cell, were identified as spectrum holes, and otherwise referred to as channel holes, in this paper. A model for this system-created, GSM spatial whitespace was formulated. Using the coverage radius of a cell, antenna directivity and other engineering parameters together with frequency planning map of a GSM operator in Ilorin, the capital city of Kwara state in Nigeria, a computation of potential available bandwidth within the coverage area of some GSM cells was done to demonstrate the model. The quantity of white space that can be recovered per cell, shows that there exists higher potential for secondary cognitive usage of the GSM 900 and 1800 band than claimed in reports of several, previous spectrum occupancy measurements. A comparison of the utilization level by this approach with some other works revealed a considerable increase in recoverable spectrum holes in the two GSM bands combined.Item A Smart System For Monitoring Oil Pipeline Installations Using Fiber Optic Sensors(Faculty of Engineering and Technology, Ladoke Akintola University of Technology, Ogbomosho., 2015) Akande, Tajudeen A.; Onidare, Samuel O; Ayeni, Olumuyiwa B.; Ayeni, Adeseko A.Oil Pipeline installations are national infrastructures of high economic value. This makes monitoring and protection of such installations against the threat of economic saboteurs a national issue for any government. In this paper, a system for smart monitoring of oil pipeline using optical fiber cable is presented as a solution to the inadequacy of the traditional human and/or animal physical monitoring. The designed system employs fiber optic as sensor laid along the oil pipeline installation and a software that analyses the optical signal generated to determine the occurrence of threat to the installations. The smart system takes advantage of the effect of environmental phenomenon on optical signal traversing the optical fiber sensor in the automated monitoring of oil pipeline installations. On the basis of the mathematical relationship between light intensity and applied pressure, the system is able to determine (against a pre-set threshold), an attempt or the actual vandalization of oil pipeline installation.