Raouf Abozariba

• Birmingham City University

Video conferencing and live streaming are being used in various industries, such as healthcare, gaming, telecommunication, manufacturing and others. As technology progresses, the need for real-time data transmission with minimal latency has increased. Web Real-Time Communication (WebRTC) addresses this need effectively. WebRTC is a technology desig...

Analyzing multilayer Non-Orthogonal Multiple Access (NOMA) under mobility is a complex task that is not sufficiently treated in the literature. This paper presents a link-level simulator compliant with 3GPP Fifth-Generation (5G) physical-layer technologies with NOMA downlink extension, capable of performing detailed mobility analysis. The simulator...

Private 5G networks for industrial users are emerging as one of the leading advanced 5G use cases. This timely work presents a comprehensive experimental analysis of a private 5G network conducted in sparse and dense industrial environments at sub-6 GHz. Measured results of the over-the-air error vector magnitude (EVM) are provided, considering sig...

This paper investigates the integration of multi-layer non-orthogonal multiple access (N-NOMA) into a 5G New Radio (NR) compliant transceiver model, aiming to reveal the full potential of the NOMA technology in practical scenarios. We propose an N-NOMA-aided 5G NR physical layer (PHY) design, where a simplified multi-layer NOMA multiplexer with a o...

Despite 5 revolutionary generations and 18 releases, automated measurement tools for cellular networks offer limited programmability and their integrated APIs remain difficult to reproduce. We demonstrate the challenges and solutions related to building web and mobile-based applications for continuous cellular networks data collection and analysis....

This paper presents FBA-SDN, a novel Stellar Consensus Protocol (SCP)-based Federated Byzantine Agreement System (FBAS) approach to trustworthy Collaborative Intrusion Detection (CIDS) in Software-Defined Network (SDN) environments. The proposed approach employs the robustness of Byzantine Fault Tolerance (BFT) consensus mechanisms and the decentra...

The future wireless network aims to accommodate new forms of services arising from the large-scale inclusion of the internet of things (IoT). This inclusion of IoT and ever-increasing users will require the future network to possess higher system capacity and manage heterogeneity in the service requirement. Layer division multiplexing (LDM) is a po...

Non-Orthogonal Multiple Access (NOMA) is a promising technology for future-generation wireless systems, with potential to contribute to the improvement of spectral efficiency. NOMA groups users into clusters, based on channel gain-difference. However, user mobility continuously changes the channel gain, which often requires re-clustering. In this p...

Due to the dramatic increase of spectrum demand, efficient usage of the limited spectrum resources has become a crucial issue for the next-generation wireless networks. Auction-based spectrum trading, utilization and pricing have many promising features and have proven to be a fair and consistent way of secondary spectrum trading and management. In...

Unlicensed spectrum offers opportunities for cellular mobile network operators, where traffic can be offloaded from licensed to unlicensed bands. Modern heterogeneous technologies such as 5G New Radio (NR) and WiFi can simultaneously operate on ISM and UNII bands under strict coexistence rules. While satisfying harmonious coexistence has largely be...

Detailed information on tree species constitutes an essential factor to support forest health monitoring and biodiversity conservation. Current deep learning-based mobile applications for tree and plant identification require excessive computation. They largely depend on a network connection to perform computing tasks on powerful remote servers in...

Providing connectivity to high-density traffic demand is one of the key promises of future wireless networks. The open radio access network (O-RAN) is one of the critical drivers ensuring such connectivity in heterogeneous networks. Despite intense interest from researchers in this domain, key challenges remain to ensure efficient network resource...

Wireless communication technology has made tremendous progress over the last two decades providing extensive coverage, high data-rate and low-latency. The current major upgrade, the fifth generation (5G) wireless technology promises substantial improvement over 4G broadband cellular technology. However, even in many developed countries, rural areas...

With the unprecedented technological advances witnessed in the last two decades, more devices are connected to the internet, forming what is called internet of things (IoT). IoT devices with heterogeneous characteristics and quality of experience (QoE) requirements may engage in dynamic spectrum market due to scarcity of radio resources. We propose...

This paper presents a mathematical approach to the future dynamic spectrum market, where multiple secondary operators compete to gain radio resources. The secondary network operators (SNOs) face various concurrent auctions. We discuss techniques, which can be used to select auctions to optimize their objectives and increase the winning probability....

Dynamic spectrum sharing aims to provide flexible spectrum usage and improve spectrum efficiency for cellular and non-cellular networks. We propose two optimization models using stochastic optimization algorithms in which the secondary operator (i) spends the minimal cost to achieve the target grade of service assuming unrestricted budget or (ii) g...

Spectrum sharing between operators with exclusive licensing have become a major concern for mobile network operators and regulators to respond to the growing spectrum demand of the multimedia applications. One of the important issues in spectrum sharing is to determine the potential benefit when multi-operators share the resources under certain mut...

Spectrum sensing is a key enabling technology for cognitive radio networks (CRNs). The main objective of spectrum sensing is to provide more spectrum access opportunities to cognitive radio users without interfering with the operations of the licensed network. Spectrum sensing decisions can lead to erroneous sensing with low performance due to fadi...

Due to the exponentially growing wireless applications and services, traffic demand is increasing rapidly. To cope with such growth wireless network operators seek for radio resource cooperation strategies for their users with the highest possible grade of service (GoS). In this paper we propose a set of analytical models for dynamic spectrum acces...

Spectrum sensing is the key enabling technology for cognitive radio networks. The main objective of spectrum sensing is to provide more spectrum access opportunities to cognitive radio users without interfering with the operations of the licensed network. Spectrum sensing decisions can lead to erroneous sensing due to fading, shadowing and other in...