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All Journal International Journal of Electrical and Computer Engineering Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Computer Science
Mardeni Roslee
Multimedia University
Computer Science & IT Electrical & Electronics Engineering

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Journal : International Journal of Electrical and Computer Engineering

 1 
An intelligent spectrum handoff scheme based on multiple attribute decision making for LTE-A network Abdulraqeb Alhammadi; Mardeni Roslee; Mohamad Yusoff Alias; Khalid Sheikhidris; Yong Jun Jack; Anas Bin Abas; Kesh. S. Randhava
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 6: December 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (918.92 KB) | DOI: 10.11591/ijece.v9i6.pp5330-5339

Abstract

Cognitive radio networks (CRNs) play an important role in wireless communications which have the ability to significantly utilize the spectrum that not in used and reduce the current spectrum scarcity. CR allows unlicensed users (secondary users) to occupy the licensed spectrums without causing interference with licensed users (primary users). This can be achieved smoothly through four main CR procedures: spectrum sensing, spectrum decision, spectrum sharing, and spectrum  mobility. In this paper, we propose an intelligent spectrum handoff (SH) scheme based on multiple attributes decision making. The handoff decision depends on three considered parameters: received power, traffic load and arrival rate of the primary users. The simulation results show the proposed scheme outperformed the conventional scheme by reducing the probability of SH which leads to improve system performance.
Efficient radio resource allocation scheme for 5G networks with device-to-device communication Fareha Nizam; Mardeni Roslee; Zubaida Yusoff; Prince Ugochukwu Nmenme; Keshvinder Singh; Hafizal Mohamad; Anwar Faizd Bin Osman; Ibraheem Abdullah Mohammed Shayea
International Journal of Electrical and Computer Engineering (IJECE) Vol 11, No 6: December 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v11i6.pp5588-5600

Abstract

A vital technology in the next-generation cellular network is device-to-device (D2D) communication. Cellular user enabled with D2D communication provides high spectral efficiency and further increases the coverage area of the cell, especially for the end-cell users and blind spot areas. However, the implementation of D2D communication increases interference among the cellular and D2D users. In this paper, we proposed a radio resource allocation (RRA) algorithm to manage the interference using fractional frequency reuse (FFR) scheme and Hungarian algorithm. The proposed algorithm is divided into three parts. First, the FFR scheme allocates different frequency bands among the cell (inner and outer region) for both the cellular and the D2D users to reduce the interference. Second, the Hungarian weighted bipartite matching algorithm is used to allocate the resources to D2D users with the minimum total system interference, while maintaining the total system sum rate. The cellular users share the resources with more than one D2D pair. Lastly, the local search technique of swapping is used for further allocation to minimize the interference. We implemented two types of assignments, fair multiple assignment, and restricted multiple assignment. We compared our results with existing algorithms which verified that our proposed algorithm provides outstanding results in aspects like interference reduction and system sum rate. For restricted multiple assignment, 60-70% of the D2D users are allocated in average cases.
Co-Authors Abdullah H. Alquhali Abdulraqeb Alhammadi Anas Bin Abas Anwar Faizd Bin Osman Azah Syafiah Mohd Marzuki Fareha Nizam Hafizal Mohamad Ibraheem Abdullah Mohammed Shayea Kesh. S. Randhava Keshvinder Singh Khaldon Kordi Khalid S. Mohamed Khalid Sheikhidris Md. Golam Sadeque Mohamad Y. Alias Mohamad Yusoff Alias Mohamed Babikir Abdelgadir Prince Ugochukwu Nmenme Shaiful Jahari Hashim Yong Jun Jack Zubaida Yusoff