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Towards the Mobility Issues of 5G-NOMA Through User Dissociation and Re-association Control

NAEEM, Muhammad, ABOZARIBA, Raouf, ASADUZZAMAN, Md and PATWARY, Mohammad (2020) Towards the Mobility Issues of 5G-NOMA Through User Dissociation and Re-association Control. In: IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks, August 31 - September 03, 2020, Cork, Ireland. (In Press)

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Abstract or description

Non-Orthogonal Multiple Access (NOMA) system is considered as core enabler for the Fifth-Generation (5G) of the wireless cellular networks, contributing to the improvement of spectral efficiency. NOMA groups users into clusters, based on the maximum channel gain-difference. However, user mobility continuously changes the channel gain and requires re-clustering, depending on the percentage of mobile users and the environment in which they operate. In this paper, we propose a set of re-clustering methods: arbitrary, one-by-one and simultaneous, that expedite link re-establishment and keep the clusters interference-free, taking into account the mobility of users. The methods are applied to dissociate identified users within clusters, when the gain-difference is lower than a given threshold, followed by re-association procedure, which integrates users into different clusters, maintaining an appropriate gain-difference. The proposed methods are based on mathematical formulation and algorithms and address many technical and computational challenges associated with the clustering techniques. Numerical and experimental investigation has been carried out to test their performance and the results show that the simultaneous method can provide lower number of clusters, making it more suitable in dense and highly mobile scenarios. Our findings also demonstrate that this method has the potential to minimize the number of reclustering, improving resource utilization and lowering signaling loads.

Item Type: Conference or Workshop Item (Paper)
Additional Information: “© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
Faculty: School of Creative Arts and Engineering > Engineering
Event Title: IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks
Event Location: Cork, Ireland
Event Dates: August 31 - September 03, 2020
Depositing User: Md ASADUZZAMAN
Date Deposited: 14 Jul 2020 14:03
Last Modified: 24 Feb 2023 13:59

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