Hesham Elbadawy

Ministry of Communications and Information Technology | MCIT · Central Administrative for Research and Development

Intelligent Reflecting Surfaces (IRS) and Multiple-Input Single-Output (MISO) technologies are essential in the fifth generation (5G) networks and beyond. IRS optimizes the signal propagation and the coverage and is a viable approach to address the issues caused by fading channels that limits the spectral efficiency, while MIMO enhances data rates,...

For the deployment of Sixth Generation (6G) networks, integrating Massive Multiple-Input Multiple-Output (Massive MIMO) systems with Intelligent Reflecting Surfaces (IRS) is highly recommended due to its significant benefits in reducing communication losses for Non-Line-of-Sight (NLoS) conditions. However, the use of passive IRS presents challenges...

Intelligent reflecting surfaces (IRS) are an innovative technique that dramatically increases system efficiency. The integration of massive multiple-input multiple-output (massive MIMO) and IRS has been considered the most efficient route to 6G networks. An important challenge in IRS-aided massive MIMO wireless systems is channel estimation. With a...

Intelligent and sustainable vehicle networking (ISVN) is a promising new paradigm for transportation that leverages advances in vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication to enable vehicles to cooperate with each other and with the infrastructure to improve traffic safety and sustainability. Centralized V2V communica...

Smart cities are now embracing the new frontier of urban living, with advanced technology being used to enhance the quality of life for residents. Many of these cities have developed transportation systems that improve efficiency and sustainability, as well as quality. Integrating cutting-edge transportation technology and data-driven solutions imp...

Over the past decade, numerous articles have been published on Visible Light Communication (VLC) which indicates that VLC is a advanced form of wireless communication expected to be applied in 6G networks. Based on the recent surveys of indoor VLC technology, there are several challenges to address promptly to enhance the energy efficiency of the c...

The handover (HO) process is one of the essential processes in mobile network management and becomes an indispensable solution for quality of service (QoS) improvement during a user's mobility. In the B5G/6G network, the deployment of small cells increased to keep up with the growth of mobile traffic. This deployment will increase the number of han...

Network intrusion detection has an important role in providing security to networks and computer systems. It applies different artificial intelligence technologies in order to improve performance against various cyber-attacks. Applying Deep Learning (DL) techniques has a considerable impact compared to using traditional Machine Learning (ML) method...

Wireless and mobile communication systems are in continuous evolution every day. The fifth generation (5G) is the next major phase of the mobile telecommunication and wireless system which aims to improve Quality of Service (QoS) and integrate human-to-machine and machine-to-human communications. In 5G mobile networks, mobility and small coverage a...

The huge bandwidth and immunity to electromagnetic interference make visible light communication (VLC) systems the preferred technique for many applications. Unfortunately, the superposition of multiple subcarriers in VLC orthogonal frequency division multiplexing systems leads to a high peak-to-average power ratio (PAPR). So, in this study, we aim...

The work on perfecting the rapid proliferation of wireless technologies resulted in the development of wireless modeling standards, protocols, and control of wireless manipulators. Several mobile communication technology applications in different fields are dramatically revolutionized to deliver more value at less cost. Multiple-access Edge Computi...

The huge traffic demand envisioned in 5G requires radical changes in mobile network architecture. A Centralized Radio Access Network (C-RAN) was introduced as a novel mobile network architecture, designed to effectively support the challenging requirements of future 5G networks. Coordinated Multi-point (CoMP) is one of the technologies aiming to in...

Mobile Edge Computing (MEC) technology philosophy inspires the next generation mobile networks to provide cloud computing capabilities in addition to a diverse range of Information Technology (IT) services with ultra-low latency and higher bandwidth at the edge. One of the most common challenges of 5G-MEC is the management and orchestration across...

Visible Light Communications (VLC) are receiving increased attention in the wireless communications research community. VLC is secured, power efficient, and operates in the visible light range, thus RF communication bandwidth limitation is overcome. In this article, the authors enhance the data rate, system complexity, power efficiency, and spectru...

Indoor positioning has become a very promising research topic due to the growing demand for accurate node location information for indoor environments. Nonetheless, current positioning algorithms typically present the issue of inaccurate positioning due to communication noise and interferences. In addition, most of the indoor positioning techniques...

In this paper, we aim to investigate the delay-power tradeoff problem which is attracting widespread interest due to its importance in wireless technology. This research has two main objectives. First, to assess the effect of different system parameters on the performance metrics. Second, to provide a solution for this optimization problem. A two-s...

Nowadays, the Non-Orthogonal Multiple Access (NOMA) has become the most candidate as the multiple access technique for the Fifth Generation (5G). Although, the massive increase in traffic usage is necessary, but it must not come on the account of Energy Efficiency (EE). Therefore, Green Radio (GR) which one of its main points is energy efficiency (...

Nowadays, mobile communication systems are required to provide larger bandwidth and higher data rates to accommodate the increasing number of subscribers, and the vast amount of data handling. The fifth generation (5G) requires higher frequency bands as the sub-six and the millimeter bands. New designs for antennas are expected to fulfil these requ...

Nowadays, visible light communication (VLC) systems have become one of the candidate technologies for high data rate indoor communications. However, the main challenge to develop a high data rate VLC system is the narrow modulation bandwidth of light-emitting diodes (LEDs). Power domain non-orthogonal multiple access (PD-NOMA) is a promising scheme...

The demand for extensive data rates in dense-traffic wireless networks has expanded and needs proper controlling schemes. The fifth generation of mobile communications (5G) will accommodate these massive communications, such as massive Machine Type Communications (mMTC), which is considered to be one of its top services. To achieve optimal throughp...

Provisioning multimedia services via packet switched network is one of the most innovative trends in telecommunication world. IP Multimedia Subsystem (IMS) was a masterwork system that it can provide all services over an IP-based infrastructure. This paper aims to illustrate a new model called IP Multimedia Mediator System (IMM) which is a unified...

In the underlay spectrum sharing approach, cognitive radios have limited coverage area to keep interference protection for the licensed users. Multiple cooperative relays have shown benefit for allowing reliable communication with an increase in the radio coverage area. The performance of an underlay cognitive cooperative multiple relays network (C...

A hybrid overlay/underlay cognitive radio network (CRN) is demonstrated to provide high spectrum efficiency and channel capacity. Decision-making in joining CRNs is one of the major issues of secondary users (SUs). Each SU has the option of joining the spectrum or balking according to the trade-off between the service profit and the delay cost. In...

Dense communication networks have been investigated recently to enable communications of low power wireless devices such as Internet-of-things (IoT) applications in the fifth cellular generation (5G). The wireless sensor network (WSN) is one of the principal technologies of IoT as it plays a critical role in numerous industries such as agriculture,...

in this paper we discuss a dynamic centralized resources allocation algorithm called Doubly Stochastic Approximation Resources allocation (DSA-RA) algorithm, the algorithm used to allocate resources for MTC devices deployed in disaster area. The proposed algorithm aims to maximize sum rate and minimize the delay of delay sensitive MTC devices in cr...

Cognitive Radio (CR) is an emerging technology which enables efficient utilization of the spectrum. As such, it has created great interests in industrial and research fields. Since CR users are vulnerable to malicious attacks, security countermeasures are important for the successful deployment of CR networks in the future. This paper focuses on de...

In Broadband Communications (BBC), terms like “Green Communication (GC)”, “Energy Efficiency (EE)”, and “Opportunistic Cognitive Radio (OCR)” are pursuing methods for saving energy consumption while accomplishing communications. Good implementations of these terms/concepts contribute in reducing pollution and preserve nature resources. Forthcoming...

The LTE “Long Term Evolution” technology was introduced to reduces the DATA network latency, in addition to provide higher data throughput. But the nature of LTE prohibits the transmission of voice related services. VoLTE “Voice over LTE” is a solution to transfer voice packets with special treatment over the LTE network, and get benefits from its...

The different realistic propagation channels are faced frequently the multipath fading environments. The main goal of this system design (cognitive radio network) is to improve the efficiency of spectrum access on a non-interfering basis. This system achieves high utilization for the limited spectrum in order to fulfill needs for all users’ demands...

It is a great pleasure to welcome the participants of the 32 nd National Radio Science Conference in the premises of MSA University. It is also an honor for the university to organize this high profile event for the third time during the lifetime of this prestigious national conference.

Recently, several approaches were followed for the enhancement and better resource utilization in mobile networks; this is to achieve energy efficient consumption for production and delivery of an information bit. Using Cognitive Femto cells (as a member of the small base stations’ family) proves that, it is an efficient solution for achieving this...

Call admission control (CAC) is a key enabling technique to ensure quality of service (QoS) provisioning for mobile users. Limited fractional guard channel is one of most effective strategy in call admission control. Inter-cell interference coordination (ICIC) is considered as the most promising approach for LTE to mitigate inter-cell interference....

The call admission control (CAC) optimizes the use of allocated channels against offered traffic maintaining the required quality of service (QoS). Provisioning QoS to user at cell-edge is a challenge where there is limitation in cell resources due to inter-cell interference (ICI). Soft Frequency Reuse is ICI mitigation scheme that controls the dis...

In order to protect the user's privacy as well as the network used, security support is mandatory for any communication. Unilateral authentication between the subscriber and Base Station (BS) was one of IEEE 802.16 security leaks. According to IEEE 802.16e, some security flaws are resolved, while there is scarcities of research on Mesh topology sec...

This research paper examines the vulnerable security elements that MAC management messages in WiMAX initial network entry faces. The paper proposes an innovative hybrid approach to resolve such vulnerability problem and establish secret communication channels via insecure domains. The proposed protocol is based on Bio-crypto systems and to improve...

Dropping probability of handoff calls and blocking probability of new calls are two important Quality of Service (QoS) measures for LTE-Advanced networks. Applying QoS for Cell edge users in soft frequency reuse scheme in LTE system is a challenge as they already suffer from limited resources. Assigning some resources for handover calls may enhance...

Whereas cellular wireless communication systems are subject to short-and long-term fading. The effect of wireless channel has largely been ignored in most of the teletraffic assessment researches. In this paper, a mathematical teletraffic model is proposed to estimate blocking and forced termination probabilities of cellular wireless networks as a...

Cellular dwell time plays an important role in calculating teletraffic performance metrics such as call blocking and forced termination probabilities. However to our knowledge, cellular teletraffic performance had not been calculated under the assumption of heavy-tailed cellular dwell time distribution. In this paper, it will be shown that the heav...

The convergence of heterogeneous wireless networks combines existing wireless networks. An effective combination of different wireless networks should enable them to complement each other and provide high-speed data rate, wide area coverage, and quality of service (QoS) guarantee. In Next Generation Wireless Systems (NGWS), seamless handoff between...