Browsing by Author "Adeniran, Temitayo C."
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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 Enhancing WCDMA Power Control Mechanism with Channel Prediction(ABACUS, The Journal of the Mathematical Association of Nigeria, 2016) Ayeni, Adeseko A.; Onidare, Samuel O; Babatola, Adekunle; Adeniran, Temitayo C.A good power control algorithm is very essential in a Wideband Code Division Multiple Access (WCDMA) system. This is to prevent Near - Far effect or Multi - Access Interference (MAI) and its associated effects, which include degradation of channel capacity and signal quality, as well as significant drain of the user equipment (UE) battery power. To solve these problems, there is the need for an effective and efficient power control mechanism to compensate for the fading fluctuations in the transmit power level of the mobile stations (MS) such that the signal power from multiple UE's (Near or far) is made equal at the Base Station. The conventional power control algorithm, based on SIR, may lead to positive feedback or power escalation when the far away MS increases its transmit power to compensate for the interference from the near MS. This paper proposes a method, based on predicting the state of the transmission channels to develop an improved power control mechanism in WCDMA systems. The proposed method uses Kalman filtering and Linear Quadratic Gaussian (LQG) control for channel prediction. Some conventional methods of power control in WCDMA such as Fixed Step size method, Quantized Step size method and Ideal Method are examined. The proposed method is then compared with the conventional methods using MATLAB. Analysis of the simulations show that the proposed method recovers faster from deep fades and provides a more steady performance than the conventional methods.Item Experimental Determination of Path Loss Exponent for GSM 900 and 1800 Bands, in Ilorin Metropolis.(ABACUS, The Journal of the Mathematical Association of Nigeria, 2016) Ayeni, Adeseko A.; Onidare, Samuel O; Adebowale, Quadri R.; Adeniran, Temitayo C.The path loss exponent of an environment describes the propagation behaviour of the environment. This paper determines the path loss exponent of the GSM 900 MHz and 1800 MHz bands in Ilorin, Kwara state of Nigeria. A comprehensive signal strength measurement campaign, using an Agilent spectrum analyzer, was carried out in 12 different routes representing, virtually, the entire metropolis of Ilorin. In computing the path loss exponent, a different approach from the more frequently used linear regression approach, was used. The experimental data reveal a lot of findings, chief amongst which is the strong influence of the terrain profile on the path loss of the environment. Consequently, the path loss exponent obtained, especially for the GSM 900, is lower than the expected value as reported in the literatures.