Department of Computer Science

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https://keffi.nsuk.edu.ng/handle/20.500.14448/3871

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Browsing Department of Computer Science by Subject "about four key words separated by commas"

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    Analysis of Packet Reordering Delay for Bandwidth Aggregation in Heterogeneous Wireless Networks
    (Department of Computer Science, Nasarawa State University Keffi, 2018-07-06) Anwar, Farhat; Masud, Mosharrof H.; Islam Khan, Burhan UI; Olanrewaju, Rashidah F.; Latif, Suhaimi A.
    Bandwidth aggregation in heterogeneous wireless networks (HWN) can be one of the effective solutions in providing quality data transmission for real-time applications. However, transmitting the data through multiple networks create packet reordering issues that result in transmission delay and degrades the overall quality of services. This paper addresses packet reordering issues both for single and multiple paths with a reordering delay in the transmission system. An algorithm has proposed to mitigate the associated delay that has been simulated in network simulator 3 (NS3). The simulation results have benchmarked with the well known Earliest Delivery Path First (EDPF) method and shown better performance over the EDPF results. Moreover, the simulation has been done to analyze the packet scheduling including to measuring packet reordering delay, and reordering entropy. CBR and VBR applications have been transmitted for 1800ms from sender to receiver in a heterogeneous wireless environment created in NS3. The results show the proposed method achieved to reduce the reordering delay and reordering entropy both for CBR and VBR applications.
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    Bandwidth Allocation Policy using the Game Theory Model in Heterogeneous Wireless Networks
    (Department of Computer Science, Nasarawa State University Keffi, 2018-07-06) Anwar, Farhat; Masud, Mosharrof H.; Islam Khan, Burhan UI; Olanrewaju, Rashidah F.; Latif, Suhaimi A.
    In Heterogeneous Wireless Network (WHN), a Mobile Device (MD) can be connected with multiple access technologies available in a particular geographical area. Selection of appropriate access technology is a challenge for the MD where game theory policy can be applied. Shapley Value is one of the game-theoretic models that can be applied to allocate appropriate bandwidth for i number of users for k number of services from N access technologies. It proposes the fairest allocation of the collectively gained profits among the collaborative players in the game. The primary focus is to find the relative contribution of every player in a cooperative game. This paper has drawn a numerical analysis of Shapley Value for three wireless access technologies, namely WiFi, Cellular and WiMAX. It has been shown how much bandwidth can be allocated from an access technology for a required bandwidth for a specific service. It can be noted from the results that 225Kbps, 141.67Kbps and 233.33Kbps can be allocated from WiFi, Cellular and WiMAX respectively to transmit the 600Kbps data in an HWN network.