Browsing by Author "Ahmed, Muhammed Z."

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    Border Gateway Protocol to provide failover in multihoming environment
    (Springer Singapore, 2017-03-01) Ahmed, Muhammed Z.; AbdallahHashim, Aisha H.; Khalifa, Othman O.; Salami, Momoh-Jimoh E.
    Nowadays Internet access across the globe is very crucial because of the huge size of useful data that the Internet stores. This stimulates most ISPs to choose a reliable routing protocol in order to preserve the security and guarantee of customer’s data on the Internet. By multi-homing a network using BGP, a more control of balancing the traffic load and achieving redundancy becomes possible. This will enhance network performance, quality throughput and better routing policies on the Internet. Single-homed Internet communication link between networks’ Internet service provider does not inspire with confidence because of excessive traffic and device or human error that may arise. We use BGP because of its ability to choose the best path to a destination particularly in a Multihoming environment. Our simulation results are achieved using GNS3 emulator and Wireshark network analyser. We carried out two simulations to run BGP Multihoming to the same service provider and to different service provider. In both scenarios we run the simulations in failover mode and in load-shearing mode. Simulation results show that BGP Multihoming to different service providers provides failover to ISP networks. For a home and enterprise network to have a certain level of failover or redundancy there is a need to employ the use of BGP Multihoming to different service provider.
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    Performance of Turbo Code in CDMA under AWGN Channel
    (International Journal of Future Generation Communication and Networking, 2017-05-01) Babiker, Mohanad; Khalifa, Othman O.; Hashim, Aisha H. A.; Salami, Momoh-Jimoh E.; Ahmed, Muhammed Z.
    Carrier Division Multiple Access is considered as an efficient technique in wireless communication due to its high possibility to serve an unlimited number of users. CDMA uses the same frequency concurrently with wireless communication. In this paper, the performance and evaluation of turbo code are duly presented followed by the examination of CDMA under AWGN channel was highlighted. The simulation estimated to achieve bit error rate of less than 10-2 frame size. To this end, the results of the simulation show that the Bit Error Rate is inversely proportional to the size of the frame and directly proportional the number of iteration in the decoder.
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    Queuing Theory Approach for Evaluating Rate of Transmission in Wireless Network Using Network Coding
    (SCIENCE & ENGINEERING RESEARCH SUPPORT SOC, 2017-06-01) Ahmed, Muhammed Z.; Khalifa, Othman O.; Hassan, Aisha; Hashim, Abdallah; Salami, Momoh-Jimoh E.; Babikier, Muhanad
    Due to the rapid development in the transmission of Wireless Network technologies, the need for rate evaluation using network coding demands urgent attention. This is solely dependent on how to improve on high performance communication channels for user’s interest. In this paper, an approach of using queuing theory in a wireless network is presented. The idea of network coding in a wireless environment address the transmission of packets not only in unicast form but also address the conflict in packet movement across a channel. Network coding also contributes greatly in computer communication system and other computer based electronic appliances. This means that a source is transmitting packets to a particular destination according to the user’s needs in a communication system. Packet transmission is enhanced within the wireless network using queuing theory. In this approach, the first routers are set to be the user access router and another directly connected router is set to be the source router. The user access router is set to connect 11 number of other routers where mainly the network coding is conducted. The results show an improvement in transmission rate by applying network coding as compared to other scenarios where networks coding are not utilized or the conventional routing either.