Lisansüstü Eğitim Enstitüsü

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Browsing Lisansüstü Eğitim Enstitüsü by Institution Author "Aldemir, Sümeyra"

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    Master Thesis
    Noma-based Radio Resource Allocation For Machine Type Communications İn 5g And Beyond Cellular Networks 5g ve Ötesi Hücresel Ağlarda Makine Tipi İletişim için Noma Tabanlı Radyo Kaynak Atama
    (Kadir Has Üniversitesi, 2021) Aldemir, Sümeyra; Şadi, Yalçın
    The rapid increase of machine-to-machine (M2M) communications brings challenges in the design of cellular networks. The adversity of meeting the Quality-of-Service (QoS) requirements of a massive number of machine-type communications (MTC) devices with insufficient radio resources has emerged. The main goal of this thesis is to investigate the minimum bandwidth resource allocation problem for non-orthogonal multiple access (NOMA) based M2M communications in 5G and beyond cellular networks. A polynomial-time persistent resource allocation algorithm considering NOMA and the periodicity of the MTC traffic is proposed to solve the problem fast and efficiently. The proposed algorithm consists of two phases. In the first phase, M2M clusters are grouped into NOMA sub-clusters using a technique that minimizes the number of NOMA sub-clusters for a set of devices. NOMA sub-clusters are then allocated to resource blocks (RB) in the second phase, considering their QoS requirements while achieving minimum bandwidth reservation. Through simulations, the performance of the proposed algorithm is presented in comparison to the previously proposed access grant time interval (AGTI) based radio resource allocation algorithms. It is illustrated that the proposed algorithm improves the spectrum efficiency significantly addressing the spectrum-scarcity issue.