Abdulrahman Alabbasi

Abdulrahman Alabbasi
KTH Royal Institute of Technology | KTH · Department of Communication Systems (CoS)

Doctor of Philosophy

About

26
Publications
4,177
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271
Citations
Introduction

Publications

Publications (26)
Conference Paper
Communication systems supporting cyber-physical production applications should satisfy stringent delay and reliability requirements. Violation of these requirements may result in faulty behavior of the system and cause significant economic losses. Although wireless communications enable mobility and easy maintenance to industrial networks, it intro...
Preprint
Full-text available
Electrification turned over a new leaf in aviation by introducing new types of aerial vehicles along with new means of transportation. Addressing a plethora of use cases, drones are gaining attention and increasingly appear in the sky. Emerging concepts of flying taxi enable passengers to be transported over several tens of kilometers. Therefore, u...
Article
Full-text available
Electrification turned over a new leaf in aviation by introducing new types of aerial vehicles along with new means of transportation. Addressing a plethora of use cases, drones are gaining attention in the industry and increasingly appear in the sky. Emerging concepts of flying taxi enable passengers to be transported over several tens of kilomete...
Patent
Embodiments include methods for a network node in a wireless network to manage network resources. Such methods include mapping one or more application-level performance requirements to one or more network performance requirements. The mapping can be based on a Markov chain model and the application-level performance requirements can be associated w...
Article
Full-text available
In this paper, we propose general service-oriented end-to-end energy and delay models. They facilitate the evaluation of new schemes, by enabling flexible allocation of processing functions at multilayer radio access network. These models describe the underlaying processing of communication function (PCF)’s complexity and the induced bandwidth. We...
Preprint
Full-text available
A hybrid cloud radio access network (H-CRAN) architecture has been proposed to alleviate the midhaul capacity limitation in C-RAN. In this architecture, functional splitting is utilized to distribute the processing functions between a central cloud and edge clouds. The flexibility of selecting specific split point enables the H-CRAN designer to red...
Article
Today's modern communication technologies such as cloud radio access and software defined networks are key candidate technologies for enabling 5G networks as they incorporate intelligence for data-driven networks. Traditional content caching in the last mile access point has shown a reduction in the core network traffic. However, the radio access n...
Article
Full-text available
Cloud radio access network (CRAN) architecture is proposed to save energy, facilitate coordination between radio units (RUs), and achieve scalable solutions to improve radio network’s performance. However, stringent delay and bandwidth constraints are incurred by fronthaul in CRAN (the network segment connecting RUs and digital units (DUs)). Theref...
Conference Paper
The inevitable deployment of 5G and the Internet-of-Things (IoT) sheds the light on the importance of the energy efficiency (EE) performance of Device-to-Device (DD) communication systems. In this work, we address a potential IoT application, where different prioritized DD system, i.e., Low-Priority (LP) and High-Priority (HP) systems, co-exist and...
Conference Paper
Full-text available
Cloud radio access network (CRAN) has been proposed as a potential energy saving architecture and a scalable solution to increase the capacity and performance of radio networks. The original CRAN decouples the digital unit (DU) from radio unit (RU) and centralizes the DUs. However, stringent delay and bandwidth constraints are incurred by fronthaul...
Article
In this work, we propose a cross-layer design, which optimizes the energy efficiency of a potential future 5G spectrumsharing environment, in two sharing scenarios. In the first scenario, underlying sharing is considered. We propose and minimize a modified energy per good bit (MEPG) metric, with respect to the spectrum sharing user’s transmission p...
Article
Full-text available
Traditional live television (TV) broadcasting systems are proven to be spectrum inefficient. Therefore, researchers propose to provide TV services on fourth-generation (4G) long-term evolution (LTE) networks. However, static broadcast, a typical broadcasting method over cellular network, is inefficient in terms of radio resource usage. To solve thi...
Article
Future wireless technologies, such as fifth-generation (5G), are expected to support real-time applications with high data throughput, e.g., holographic meetings. From a bandwidth perspective, cognitive radio (CR) is a promising technology to enhance the system's throughput via sharing the licensed spectrum. From a delay perspective, it is well kno...
Article
In this paper, an energy efficient cognitive radio system is proposed. The proposed design optimizes the secondary user transmission power and the sensing duration combined with soft-sensing information to minimize the energy per goodbit. Due to the non-convex nature of the problem we prove its pseudo-convexity to guarantee the optimal solution. Fu...
Article
Full-text available
In this paper, two resource allocation schemes for energy efficient cognitive radio systems are proposed. Our design considers resource allocation approaches that adopt spectrum sharing combined with soft-sensing information, adaptive sensing thresholds, and adaptive power to achieve an energy efficient system. An energy per good-bit metric is cons...
Article
Full-text available
In this paper, we consider a cognitive radio multi-input–multi-output environment, in which we adapt our beamformer to maximize both energy efficiency (EE) and signal-to-interference-plus-noise ratio (SINR) metrics. Our design considers an underlaying communication using adaptive beamforming schemes combined with sensing information to achieve opti...
Conference Paper
In this paper we consider a cognitive radio multi-input multi-output environment in which we adapt our beamformer to maximize both energy efficiency and signal to interference plus noise ratio (SINR) metrics. Our design considers an underlaying communication using adaptive beamforming schemes combined with the sensing information to achieve an opti...
Conference Paper
In this paper we propose an energy efficient cognitive radio system. Our design considers an underlaying resource allocation combined with soft sensing information to achieve a sub-optimum energy efficient system. The sub-optimality is achieved by optimizing over a channel inversion power policy instead of considering a water-filling power policy....

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Projects

Project (1)
Project
SooGreen is built around the need of reducing the energy consumption of services in light of the traffic evolutions and exploiting the new network architectures, while keeping in mind the development of smart grids. This includes: - modeling the energy consumption of services in different mobile network architectures and taking into account the end-to-end path; - definition of KPIs for energy efficiency of services and adequate measurement and reporting methods (for energy efficiency standard evolutions); - a joint dynamic optimization of the mobile access network and the content delivery solutions; - definition of service-specific offload solutions that reduce the energy consumption; - proposal of solutions for enabling the bi-directional interaction of the mobile network and the smart grid by exploiting the flexibility of some services and the energy storage capabilities in the network.