Khalid Darabkh

University of Jordan | UJ · Department of Computer Engineering

Wireless communication demands rapidly increase due to the increase of Internet of Things applications, which leads researchers to build secondary networks that exploit the spectrum holes of primary networks. Cognitive radio (CR) technology is adopted in ad-hoc networks (AHNs) rather than infrastructure-based networks because AHNs have lower cost,...

In recent times, Cognitive Radio Networks (CRNS) have been broadly investigated in light of the unceasingly growing demands of the Internet of Things (IoT) applications, paving the path to equipping IoT objects with Cognitive Radio (CR) technology. Thus, the implementation of these two technologies in unison has been attracting research interests....

In the course of time, the Internet of Things (IoT) has attracted significant research interest. However, IoT devices have limited resources available in terms of battery power, processing capacity, memory, bandwidth, etc. In an attempt to provide connectivity and Internet Protocol version 6 (IPv6) support to IoT devices, the IPv6 routing protocol...

Remote Sensing (RS) is a vital technology used in several applications that enable remote measurements for sensors in a certain Area of Interest (AoI), which in turn will assist decision-making in taking the right decision. This technology, like many others, has witnessed a tremendous improvement due to the development of new technologies such as M...

In the fifth generation (5G) wireless communication system, the non‐orthogonal multiple access (NOMA) scheme has recently been proposed as a possible candidate for improving spectral efficiency. We look at power‐domain NOMA in this study, in which, multiple simultaneous transmissions are allowed at the same channel with different transmission power...

The indispensable part of IoT is the Low-power and Lossy Network (LLN), which is required to connect plenty of resource-constrained (e.g., power and memory) wireless devices. Interestingly, the IPv6 Routing Protocol for LLNs (i.e., RPL), which is the standard routing protocol for IoT, relies primarily on constructing a destination-oriented directed...

In this paper, the Half-Duplex Relay Channel (HDRC) is thoroughly investigated. Even though this channel model is widely studied, the capacity is not yet fully understood and particularly has not been tightly expressed. In this work, a new capacity expression of the discrete memoryless HDRC is explicitly established. In particular, a new expression...

Weather prediction is paramount for many applications and scenarios. Among them is agriculture. In order to efficiently irrigate the crops with the exact needed water amount, weather forecasting can be used to optimize the quantity of required irrigation water such that the crops are neither dried up nor over-irrigated. This paper proposes a Machin...

span>In recent years, wireless sensor networks (WSNs) have been considered one of the important topics for researchers due to their wide applications in our life. Several researches have been conducted to improve WSNs performance and solve their issues. One of these issues is the energy limitation in WSNs since the source of energy in most WSNs is...

Integrating the Full-Duplex (FD) communication technology in multi-hop Cognitive Radio Networks (CRNs) can significantly enhance routing decisions such that overall network performance is improved. Unfortunately, when employing the FD technology in multi-hop routing, the channel assignment becomes very challenging due to the possible simultaneous t...

There are differences between routing in traditional and in Cognitive Radio Networks (CRNs). The availability of channels, periodic spectrum sensing, jammers activity, are some of these differences, etc. CRNs may contain a large number of Internet of Things (IoT) devices, hence, modeling such networks with a flat graph model generates a huge graph...

Over time, wireless technology is evolving impulsively. For the most part, studies presently focused on the telecommunication field. Vehicular Ad-hoc Network (VANET) is one of the leading genuine and appealing areas for Intelligent Transportation Systems (ITS) originators and organizations. Essentially, VANET is an ad-hoc network consisting of seve...

The IEEE 802.11 MAC protocols have been implemented in many wireless ad hoc and infrastructure networks. Most of the IEEE 802.11-based networks adopt a one-hop transmission mechanism (the source and destination communicate using a direct link). While this strategy is simple, it degrades network performance as it limits the number of data transmissi...

This paper presents a separable Reversible Data Hiding Algorithm for Encrypted Images (RDHEI) that consists of three phases. The encryption phase in the algorithm circularly shifts the columns in the image by a random amount, blocks the image into equal and regular blocks and maps them to irregular blocks generated based on Hilbert filling curve, a...

In this paper, we consider the transmission over multiple access relay channel (MARC) in which the relay operates in half‐duplex mode. The main contribution of this paper is establishing the capacity of the multiple access half‐duplex relay channel (MAHRC). Toward achieving this goal, we first derive a new achievable rate region. While deriving the...

Wireless Sensor Networks (WSNs) have a wide range of applications in human life. Accordingly, WSNs have beenthoroughly considered in research community to improve their performance and address their challenges. Eventreporting in WSNs has always been a major challenge in terms of energy consumption. Event reporting requiressensing the event and send...

The possibility of Internet of Things (IoT) is that a large number of live items (e.g., apparatuses) in the network are available, detected, and interconnected. In any case, the performance of IoT networks may be limited due to several impairments, most importantly, the energy-constrained IoT nodes. In fact, this limitation opens the door to many r...

Nowadays, smartphone applications (apps) are literally used in all life aspects, improving the quality of different services in addition to saving time and effort. However, the majority of currently used apps in different universities around the world are limited in their features and not very popular among students who may suffer to get useful inf...

Wireless Charging (WC) is a promising technology that has recently attracted the research community and several companies. WC has a myriad of advantages and diverse applications especially in the emerging Internet of Things (IoT) and Wireless Sensor Networks (WSNs), where energy harvesting and conservation are very crucial to prolonging network lif...

The advent of various wireless technologies has paved the way for the realization of new infrastructures and applications for smart cities. Wireless Sensor Networks (WSNs) are one of the most important among these technologies. WSNs are widely used in various applications in our daily lives. Due to their cost effectiveness and rapid deployment, WSN...

Smart agriculture is gaining popularity because of its effectiveness in improving agriculture and conserving its scare resources. This paper demonstrates a work in progress framework which utilizes a Wireless Sensor Network (WSN) equipped with several agricultural sensors and connected internally via the ZigBee wireless protocol, while it is linked...

For the sake of fulfilling the ever-increasing demands on the Internet of Things (IoT) applications, researchers are implementing Cognitive Radio (CR) technology in Ad-Hoc Networks (AHNs). Moreover, In-Band Full-Duplex (IBFD) technology in CRAHNs is gaining scholars' interests recently. Hence, we are considering non-time-slotted IBFD-CRAHNs to clea...

Due to the development and evolution in Cognitive Radio Networks (CRNs), the performance of Transmission Control Protocol (TCP) over CRN has become a crucial factor. TCP ensures the reliable end-to-end delivery of data, which is very important for the quality of service (QoS) requirements. TCP performance is severely affected by channel switching a...

The proposed work analyzes the performance of dual-hop relaying systems by means of the differential amplify-and-forward relaying method. The post-detection selection combining reception scheme proposed in this paper allows receivers to approximate existing fading gain in a branch by using previously received samples to achieve a cooperative divers...

This study considers the Gaussian cognitive interference channel (IC), in which one of the two users operates in cognitive mode. In addition, to transmit its signal, the cognitive sender can cooperatively forward the primary signal to its destination, the primary receiver. Moreover, the transmission over this IC also experiences interference from a...

The deficiencies of regular cooperative relaying schemes were the main reason behind the development of Incremental Relaying (IR). Fixed relaying is one of the regular cooperative relaying schemes and it relies on using the relay node to help in transmitting the signal of the source towards the destination despite the channel’s condition. However,...

In this paper, we consider non-time slotted cognitive radio ad-hoc networks in order to propose a routing protocol without a common control channel, thereby adhering to practicality. This is performed using multicast and unicast transmission of the control packets. The performance of this protocol is studied and compared with a quite relevant and r...

Mobile Sensor Nodes (MSNs) have been recently proposed to leverage the performance of conventional static Wireless Sensor Network (WSN). In this paper, we propose to energize both the sink and Cluster Head nodes with mobility, such that wireless communication path loss is minimized thus preserving the sensor nodes energy and extending the network l...

As of late, the improvement of savvy sensors in certifiable applications has offered footing to the movement of Wireless Sensor Networks (WSNs). In WSNs, preserving sensors' energy is a challenging issue and certainly requires extreme attention as they are limited-powered nodes. Utilizing mobile sink based approaches has been proven to be effective...

Cognitive radio (CR) is a promising technology that allows devices to effectively utilize the underutilized or unutilized portions of the licensed spectrum. In literature, several channel assignment and spectrum sharing algorithms for CR Networks (CRNs) have been developed to improve spectrum efficiency without considering the problem of Adjacent C...

Multi-channel non-time-slotted cognitive radio ad hoc networks are attractive to researchers nowadays; because they utilize the spectrum efficiently and represent a useful network design for Internet of Things (IoT) applications. From this point, a simulator that mimics these networks is developed using Java language. Further, researchers have prov...

In this paper, we study an orthogonal frequency division multiplexing-based underlay cognitive two-way amplify-and-forward (AF) relay network. We assume a system model consists of a primary network that has two primary users (PUs) and a secondary network that has two secondary users (SUs) exchanging information in two-way through a half-duplex AF r...

Wireless sensor networks (WSNs) are increasingly gaining popularity, especially with the advent of many artificial intelligence (AI) driven applications and expert systems. Such applications require specific relevant sensors’ data to be stored, processed, analyzed, and input to the expert systems. Obviously, sensor nodes (SNs) have limited energy a...

Several works have studied relaying in cognitive radio networks in terms of outage probability. The main challenge in such works is finding a mathematical expression for this performance metric under different system models. This expression can be employed in studying and designing more related systems. In this paper, we consider an underlay cognit...

Recently, Wireless Sensor Networks (WSNs) have been extensively employed in several tactical applications out of which target detection, habit monitoring, and earthquake monitoring. The open characteristic nature of WSNs makes it vulnerable to be attacked by an eavesdropper who aims at disrupting the network operation or access confidential informa...

Physical layer security has gained an increasing attention due to its efficiency and simplicity as compared to other conventionalsecurity protocols.Thus, it has been recently nominatedfor Internet of Things(IoT)applications. Inthis paper, a novel key distribution mechanism is proposed for IoT networks. The proposed mechanism exploits the channel di...

The original version of this article unfortunately contained mistakes in the author group and affiliation sections.

Wireless sensor networks have recently been widely used in several applications and scenarios, especially because they have the ability and flexibility for establishing a scalable and reliable wireless network. Cooperative multi-robotic systems (CMRS) are one example of these applications where establishing a wireless network between robots is esse...

Incremental relaying was initially presented so as to adjust for the shortages or limitations related to the usual cooperative methods, specifically, the fixed relaying methods in which the relay node assists the source node in transmitting the signals belonging to the destination independent of the channel status. Matter of fact, the adaptive rela...