International Journal of Wireless Communications and Mobile Computing

Volume 1, Issue 1, May 2013

  • Location Agent: A Study Using Different Wireless Protocols for Indoor Localization

    Ana Régia de M. Neves, Humphrey C. Fonseca, Célia G. Ralha

    Issue: Volume 1, Issue 1, May 2013
    Pages: 1-6
    Received: Mar. 15, 2013
    Accepted:
    Published: May 02, 2013
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    Abstract: Context-aware systems have received greater interest in the computing community. In order to provide relevant services at context-aware applications, the first task is to locate the user, what can be done preferably dynamically and intelligently. However, indoor mobile users localization is not a trivial problem, since it involves checking various ... Show More
  • The Details of Virtual Contention Window Concept for 802.11 IBSS Wireless Local Area Network Mathematic Modeling

    Anton V. Lazebnyy, Volodymyr S. Lazebnyy

    Issue: Volume 1, Issue 1, May 2013
    Pages: 7-13
    Received: Mar. 24, 2013
    Accepted:
    Published: May 02, 2013
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    Abstract: The concept of a virtual contention window for assessment of temporal and probabilistic characteristics of the processes occurring in the wireless LAN 802.11 is considered. The relations for determining the transmission time delay of the data package, the uneven of transmission time, throughput of wireless channel, the probability of packet loss fo... Show More
  • An Adaptive Energy-Aware Transmission Scheme for Wireless Sensor Networks

    Abdullahi Ibrahim Abdu, Muhammed Salamah

    Issue: Volume 1, Issue 1, May 2013
    Pages: 14-20
    Received: Apr. 17, 2013
    Accepted:
    Published: May 02, 2013
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    Abstract: In this paper, we proposed a scheme to extend the lifetime of a wireless sensor network, in which each sensor node decides whether to transmit a message or not and with what range to transmit the message, based on its own energy reserve level and the information contained in each message. The information content in each message is determined throug... Show More
  • Performance Evaluation of Cooperative Multi-Layer IDMA Communications with Amplify-and-Forward Protocol

    Basma A. Mahmoud, Esam A. A. Hagras, Mohamed A. Abo El-Dhab

    Issue: Volume 1, Issue 1, May 2013
    Pages: 21-25
    Received: Apr. 23, 2013
    Accepted:
    Published: May 30, 2013
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    Abstract: In this paper, we consider the Bit Error Rate (BER) performance analysis of a cooperative relay communication system for Multi-Layer IDMA (ML-IDMA) using Maximal-Ratio-Combining (MRC) technique. We examine the effect of layers number on the performance and derive the average bit error probability of the Amplify-and-Forward (AF) relay scheme by usin... Show More
  • Two Aspect Authentication System Using Secure Mobile Devices

    S. Uvaraj, S. Suresh, N. KannaiyaRaja

    Issue: Volume 1, Issue 1, May 2013
    Pages: 26-34
    Received: May 16, 2013
    Accepted:
    Published: Jun. 10, 2013
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    Abstract: Mobile devices are becoming more pervasive and more advanced with respect to their processing power and memory size. Relying on the personalized and trusted nature of such devices, security features can be deployed on them in order to uniquely identify a user to a service provider. In this paper, we present a strong authentication mechanism that ex... Show More
  • Effect of Temperature Variation on Microstrip Patch Antenna and Temperature Compensation Technique

    Sarita Maurya, R. L. Yadava, R. K. Yadav

    Issue: Volume 1, Issue 1, May 2013
    Pages: 35-40
    Received: May 30, 2013
    Accepted:
    Published: Jun. 20, 2013
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    Abstract: This paper describes the effect of temperature variation on microstrip patch antenna for different substrate materials. Eight materials are chosen as substrate and the effect of temperature variation is studied on each substrate material. A technique of temperature compensation has also been developed with substrate height variation. It is also see... Show More
  • Performance Analysis of MSE-OFDM System

    Poonam Singh, Saswat Chakrabarti

    Issue: Volume 1, Issue 1, May 2013
    Pages: 41-50
    Received: May 14, 2013
    Accepted:
    Published: Jun. 20, 2013
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    Abstract: In this paper we analyze the effects of interchannel interference (ICI) and intersymbol interference (ISI) on the performance of a Multi-Symbol Encapsulated Orthogonal Frequency Division Multiplexing (MSE-OFDM) system. MSE-OFDM is a bandwidth efficient OFDM scheme, where a number of OFDM symbols are grouped together as a frame and protected by one ... Show More
  • Internet Authentication and Billing (Hotspot) System Using MikroTik Router Operating System

    Adam Mohammed Saliu, Mohammed Idris Kolo, Mohammed Kudu Muhammad, Lukman Abiodun Nafiu

    Issue: Volume 1, Issue 1, May 2013
    Pages: 51-57
    Received: Jun. 05, 2013
    Accepted:
    Published: Jun. 30, 2013
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    Abstract: This paper is based on using MikroTik Router Operating System (OS) to build an authentication and billing System. This kind of system is always used to create security, billing and administration of users on a network connected to the Internet. It is used to restrict usage and bandwidth allocations to users. A case study of Federal University of Te... Show More