Papers by Yousef Al-Gumaei
Academic Journals, Apr 30, 2010
2018 International Conference on Smart Computing and Electronic Enterprise (ICSCEE), 2018
IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, 2020
Despite all the acknowledged advantages and recent developments in terms of reducing the environm... more Despite all the acknowledged advantages and recent developments in terms of reducing the environmental impact, noise reduction and energy efficiency, the electric mobility market is still below the expectations. Among the most important challenges that limit the market penetration of Electric Vehicles (EVs) as well as achieving a sustainable mobility system in cities is the efficient distribution of adequate EV charging stations (CSs). In this paper, we propose a novel approach to find the best locations for EVCSs that considers a combination of factors including displacement between the EV and CS, elevation difference between their locations and finite capacities of CSs. The problem is formulated as a Mixed Integer Linear problem (MILP) to minimize the total energy consumption of EVs to reach CSs. A combination of the Genetic Algorithm (GA) technique and the Branch and Bound (B&B) algorithm are used to solve the problem. The proposed EVCSs placement technique is experimentally tested considering different case studies. With real world datasets, the results demonstrate the energy centric benefits of the proposed EVCSs placement technique.
Optical Fiber Technology, 2021
Abstract Optical fiber tendencies are pushing for changes towards upgrading scalability, agility,... more Abstract Optical fiber tendencies are pushing for changes towards upgrading scalability, agility, and unwavering quality for multi-hungry bandwidth applications. In the quest for future proof of those multi-hungry bandwidth applications, is vital to take advantage of new multiplexing technologies as the surge of network traffic that soon will overwhelm the capacity of multimode fiber (MMF). Due to the issue of MMF modal dispersion and mode coupling that caused Intersymbol Interference (ISI) which result in bandwidth degradation and limited range of length. Thus, Mode division-multiplexing (MDM) is a significant and elegant emerging technology, which harnesses the symmetry of modes by transmitting in parallel data through different modes. This paper models and analysis novel four-mode group demultiplexing MDM-based Singular Value Decomposition (SVD) to isolate the signals and fairly distribute the power to the system sub-channels, each to their respective groups. The novel MDM based-SVD system achieved an aggregated data rate of 100 Gbit/s on wavelengths 1550.12 nm over an existed graded-index MMF length of 3000 m. The performance of the proposed system has been evaluated through channel impulse response, channel spectrum, eye diagram, and Bit-Error-Rate (BER) matrices.
In cognitive radio networks, each cognitive radio CR's signal represent a source of interfere... more In cognitive radio networks, each cognitive radio CR's signal represent a source of interference to other users that sharing the same spectrum. Amount of interference that should be below the interference temperature and battery power of cognitive devices are the critical issues that require an efficient power control algorithms. These algorithms aimed to attain two objectives: achieve the quality of service (QoS) and increase the system capacity. The power control problem in CRN is obviously suitable to formulation as a non-cooperative game in which CRs choose to the balance between signal-to interference ratio (SIR) error and power usage. We considered perversely the problem of power control by using the static Nash game formulation based on a sigmoid function. The solution obtained from proposed game led to a system of nonlinear algebraic sigmoid equations. In this paper, we present the distributed power control game using Newton iterations to solve the slow of convergence pr...
IEEE Internet of Things Journal, 2021
Long Range Wide Area Network (LoRaWAN) is one of the most promising IoT technologies that are wid... more Long Range Wide Area Network (LoRaWAN) is one of the most promising IoT technologies that are widely adopted in low-power wide-area networks (LPWAN). LoRaWAN faces scalability issues due to a large number of nodes connected to the same gateway and sharing the same channel. Therefore, LoRa networks seek to achieve two main objectives: successful delivery rate and efficient energy consumption. This paper proposes a novel game theoretic framework for LoRaWAN named Best Equal LoRa (BE-LoRa), to jointly optimize the packet delivery ratio and the energy efficiency (bit/Joule). The utility function of LoRa node is defined as the ratio of the throughput to the transmit power. LoRa nodes act as rational users (players) which seek to maximize their utility. The aim of the BE-LoRa algorithm is to maximize the utility of LoRa nodes while maintaining the same signal-to-interference-and-noise-ratio (SINR) for each SF. The power allocation algorithm is implemented at the network server, which leads to an optimum SINR, spreading factors (SFs) and transmission power settings of all nodes. Numerical and simulation results show that the proposed BE-LoRa power allocation algorithm has a significant improvement in packet delivery ratio and energy efficiency as compared to the Adaptive Data Rate (ADR) algorithm of legacy LoRaWAN. For instance, in very dense networks (624 nodes), BE-LoRa can improve the delivery ratio by 17.44% and reduce power consumed by 46% compared with LoRaWAN ADR.
Electronics, 2021
The millimeter-wave (mmWave) is expected to deliver a huge bandwidth to address the future demand... more The millimeter-wave (mmWave) is expected to deliver a huge bandwidth to address the future demands for higher data rate transmissions. However, one of the major challenges in the mmWave band is the increase in signal loss as the operating frequency increases. This has attracted several research interests both from academia and the industry for indoor and outdoor mmWave operations. This paper focuses on the works that have been carried out in the study of the mmWave channel measurement in indoor environments. A survey of the measurement techniques, prominent path loss models, analysis of path loss and delay spread for mmWave in different indoor environments is presented. This covers the mmWave frequencies from 28 GHz to 100 GHz that have been considered in the last two decades. In addition, the possible future trends for the mmWave indoor propagation studies and measurements have been discussed. These include the critical indoor environment, the roles of artificial intelligence, chan...
KSII Transactions on Internet and Information Systems, 2021
Device-to-Device (D2D) communication is one of the enabling technologies for 5G networks that sup... more Device-to-Device (D2D) communication is one of the enabling technologies for 5G networks that support proximity-based service (ProSe) for wireless network communications. This paper proposes a power control algorithm based on the Nash equilibrium and game theory to eliminate the interference between the cellular user device and D2D links. This leads to reliable connectivity with minimal power consumption in wireless communication. The power control in D2D is modeled as a non-cooperative game. Each device is allowed to independently select and transmit its power to maximize (or minimize) user utility. The aim is to guide user devices to converge with the Nash equilibrium by establishing connectivity with network resources. The proposed algorithm with pricing factors is used for power consumption and reduces overall interference of D2Ds communication. The proposed algorithm is evaluated in terms of the energy efficiency of the average power consumption, the number of D2D communication, and the number of iterations. Besides, the algorithm has a relatively fast convergence with the Nash Equilibrium rate. It guarantees that the user devices can achieve their required Quality of Service (QoS) by adjusting the residual cost coefficient and residual energy factor. Simulation results show that the power control shows a significant reduction in power consumption that has been achieved by approximately 20% compared with algorithms in [11].
Electronics, 2019
In this paper, the problem of power control using a game theoretic approach based on sigmoid cost... more In this paper, the problem of power control using a game theoretic approach based on sigmoid cost function is studied for device-to-device (D2D) communications underlying cellular networks. A non-cooperative game, where each D2D transmitter and a cellular user select their own transmit power level independently, is analyzed to minimize their user-serving cost function and achieve a target signal to interference-plus-noise-ratio (SINR) requirement. It is proved analytically that the Nash equilibrium point of the game exists and it is unique under certain constraints. Numerical results verify the analysis and demonstrate the effectiveness of the proposed game with variant system conditions, such as path loss exponents, target SINR, interference caused by the cellular user, pricing coefficients, and sigmoid control parameter.
2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications
This paper presents the measurements and the statistical results extracted by power profile measu... more This paper presents the measurements and the statistical results extracted by power profile measurements of an indoor 60 GHz radio channel, to assist in the development of wireless broadband systems as a part of 4G systems. The mean excess delay is in the range of 3.84 to 8.18 ns for hallways and 3.52 to 14.69 ns for offices. The rms delay spread varies from 12.34 to 15.04 ns in corridors and from 12.56 to 21.09 ns inside the offices. The coherence bandwidth varies between 13.88 and 30.49 MHz in corridors with a mean value of 22.8 MHz. Inside offices the mean coherence bandwidth is 22.80 MHz for LoS locations while drops to 7.05 MHz for NLoS. Timing jitter and standard deviation of the time delay values, remain low at all locations, and the channel does not vary significantly over 20lambda. Overall, the channel exhibits frequency selective characteristics, being extremely enhanced especially in NLoS locations
2015 1st International Conference on Telematics and Future Generation Networks (TAFGEN), 2015
KSII Transactions on Internet and Information Systems, 2015
PLOS ONE, 2015
Spectrum scarcity is a major challenge in wireless communications systems requiring efficient usa... more Spectrum scarcity is a major challenge in wireless communications systems requiring efficient usage and utilization. Cognitive radio network (CRN) is found as a promising technique to solve this problem of spectrum scarcity. It allows licensed and unlicensed users to share the same licensed spectrum band. Interference resulting from cognitive radios (CRs) has undesirable effects on quality of service (QoS) of both licensed and unlicensed systems where it causes degradation in received signal-to-noise ratio (SIR) of users. Power control is one of the most important techniques that can be used to mitigate interference and guarantee QoS in both systems. In this paper, we develop a new approach of a distributed power control for CRN based on utility and pricing. QoS of CR user is presented as a utility function via pricing and a distributed power control as a non-cooperative game in which users maximize their net utility (utility-price). We define the price as a real function of transmit power to increase pricing charge of the farthest CR users. We prove that the power control game proposed in this study has Nash Equilibrium as well as it is unique. The obtained results show that the proposed power control algorithm based on a new utility function has a significant reduction in transmit power consumption and high improvement in speed of convergence.
IEEE Internet of Things Journal, 2021
Long Range Wide Area Network (LoRaWAN) is one of the most promising IoT technologies that are wid... more Long Range Wide Area Network (LoRaWAN) is one of the most promising IoT technologies that are widely adopted in low-power wide-area networks (LPWAN). LoRaWAN faces scalability issues due to a large number of nodes connected to the same gateway and sharing the same channel. Therefore, LoRa networks seek to achieve two main objectives: successful delivery rate and efficient energy consumption. This paper proposes a novel game theoretic framework for LoRaWAN named Best Equal LoRa (BE-LoRa), to jointly optimize the packet delivery ratio and the energy efficiency (bit/Joule). The utility function of LoRa node is defined as the ratio of the throughput to the transmit power. LoRa nodes act as rational users (players) which seek to maximize their utility. The aim of the BE-LoRa algorithm is to maximize the utility of LoRa nodes while maintaining the same signal-to-interference-and-noise-ratio (SINR) for each SF. The power allocation algorithm is implemented at the network server, which leads to an optimum SINR, spreading factors (SFs) and transmission power settings of all nodes. Numerical and simulation results show that the proposed BE-LoRa power allocation algorithm has a significant improvement in packet delivery ratio and energy efficiency as compared to the Adaptive Data Rate (ADR) algorithm of legacy LoRaWAN. For instance, in very dense networks (624 nodes), BE-LoRa can improve the delivery ratio by 17.44% and reduce power consumed by 46% compared with LoRaWAN ADR.
Elseveir, 2021
Optical fiber tendencies are pushing for changes towards upgrading scalability, agility, and unwa... more Optical fiber tendencies are pushing for changes towards upgrading scalability, agility, and unwavering quality for multi-hungry bandwidth applications. In the quest for future proof of those multi-hungry bandwidth applications, is vital to take advantage of new multiplexing technologies as the surge of network traffic that soon will overwhelm the capacity of multimode fiber (MMF). Due to the issue of MMF modal dispersion and mode coupling that caused Intersymbol Interference (ISI) which result in bandwidth degradation and limited range of length. Thus, Mode division-multiplexing (MDM) is a significant and elegant emerging technology, which harnesses the symmetry of modes by transmitting in parallel data through different modes. This paper models and analysis novel four-mode group demultiplexing MDM-based Singular Value Decomposition (SVD) to isolate the signals and fairly distribute the power to the system sub-channels, each to their respective groups. The novel MDM based-SVD system achieved an aggregated data rate of 100 Gbit/s on wavelengths 1550.12 nm over an existed graded-index MMF length of 3000 m. The performance of the proposed system has been evaluated through channel impulse response, channel spectrum, eye diagram, and Bit-Error-Rate (BER) matrices.
MDPI, 2021
The millimeter-wave (mmWave) is expected to deliver a huge bandwidth to address the future demand... more The millimeter-wave (mmWave) is expected to deliver a huge bandwidth to address the future demands for higher data rate transmissions. However, one of the major challenges in the mmWave band is the increase in signal loss as the operating frequency increases. This has attracted several research interests both from academia and the industry for indoor and outdoor mmWave operations. This paper focuses on the works that have been carried out in the study of the mmWave channel measurement in indoor environments. A survey of the measurement techniques, prominent path loss models, analysis of path loss and delay spread for mmWave in different indoor environments is presented. This covers the mmWave frequencies from 28 GHz to 100 GHz that have been considered in the last two decades. In addition, the possible future trends for the mmWave indoor propagation studies and measurements have been discussed. These include the critical indoor environment, the roles of artificial intelligence, channel characterization for indoor devices, reconfigurable intelligent surfaces, and mmWave for 6G systems. This survey can help engineers and researchers to plan, design, and optimize reliable 5G wireless indoor networks. It will also motivate the researchers and engineering communities towards finding a better outcome in the future trends of the mmWave indoor wireless network for 6G systems and beyond.
In future 5G systems, the millimeter wave (mmWave) band will be used to support a large
capacity ... more In future 5G systems, the millimeter wave (mmWave) band will be used to support a large
capacity for current mobile broadband. Therefore, the radio access technology (RAT) should be made
available for 5G devices to help in distinct situations, for example device-to-device communications
(D2D) and multi-hops. This paper presents ultra-wideband channel measurements for millimeter
wave bands at 19, 28, and 38 GHz. We used an ultra-wideband channel sounder (1 GHz bandwidth)
in an indoor to outdoor (I2O) environment for non-line-of-sight (NLOS) scenarios. In an NLOS
environment, there is no direct path (line of sight), and all of the contributed paths are received from
different physical objects by refection propagation phenomena. Hence, in this work, a directional
horn antenna (high gain) was used at the transmitter, while an omnidirectional antenna was used at
the receiver to collect the radio signals from all directions. The path loss and temporal dispersion
were examined based on the acquired measurement data—the 5G propagation characteristics.
Two different path loss models were used, namely close-in (CI) free space reference distance and
alpha-beta-gamma (ABG) models. The time dispersion parameters were provided based on a mean
excess delay, a root mean square (RMS) delay spread, and a maximum excess delay. The path loss
exponent for this NLOS specific environment was found to be low for all of the proposed frequencies,
and the RMS delay spread values were less than 30 ns for all of the measured frequencies, and the
average RMS delay spread values were 19.2, 19.3, and 20.3 ns for 19, 28, and 38 GHz frequencies,
respectively. Moreover, the mean excess delay values were found also at 26.1, 25.8, and 27.3 ns for
19, 28, and 38 GHz frequencies, respectively. The propagation signal through the NLOS channel at
19, 28, and 38 GHz was strong with a low delay; it is concluded that these bands are reliable for 5G
systems in short-range applications.
MDPI, 2019
In this paper, the problem of power control using a game theoretic approach based on
sigmoid cost... more In this paper, the problem of power control using a game theoretic approach based on
sigmoid cost function is studied for device-to-device (D2D) communications underlying cellular
networks. A non-cooperative game, where each D2D transmitter and a cellular user select their own
transmit power level independently, is analyzed to minimize their user-serving cost function and
achieve a target signal to interference-plus-noise-ratio (SINR) requirement. It is proved analytically
that the Nash equilibrium point of the game exists and it is unique under certain constraints.
Numerical results verify the analysis and demonstrate the effectiveness of the proposed game
with variant system conditions, such as path loss exponents, target SINR, interference caused by the
cellular user, pricing coefficients, and sigmoid control parameter.
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Papers by Yousef Al-Gumaei
capacity for current mobile broadband. Therefore, the radio access technology (RAT) should be made
available for 5G devices to help in distinct situations, for example device-to-device communications
(D2D) and multi-hops. This paper presents ultra-wideband channel measurements for millimeter
wave bands at 19, 28, and 38 GHz. We used an ultra-wideband channel sounder (1 GHz bandwidth)
in an indoor to outdoor (I2O) environment for non-line-of-sight (NLOS) scenarios. In an NLOS
environment, there is no direct path (line of sight), and all of the contributed paths are received from
different physical objects by refection propagation phenomena. Hence, in this work, a directional
horn antenna (high gain) was used at the transmitter, while an omnidirectional antenna was used at
the receiver to collect the radio signals from all directions. The path loss and temporal dispersion
were examined based on the acquired measurement data—the 5G propagation characteristics.
Two different path loss models were used, namely close-in (CI) free space reference distance and
alpha-beta-gamma (ABG) models. The time dispersion parameters were provided based on a mean
excess delay, a root mean square (RMS) delay spread, and a maximum excess delay. The path loss
exponent for this NLOS specific environment was found to be low for all of the proposed frequencies,
and the RMS delay spread values were less than 30 ns for all of the measured frequencies, and the
average RMS delay spread values were 19.2, 19.3, and 20.3 ns for 19, 28, and 38 GHz frequencies,
respectively. Moreover, the mean excess delay values were found also at 26.1, 25.8, and 27.3 ns for
19, 28, and 38 GHz frequencies, respectively. The propagation signal through the NLOS channel at
19, 28, and 38 GHz was strong with a low delay; it is concluded that these bands are reliable for 5G
systems in short-range applications.
sigmoid cost function is studied for device-to-device (D2D) communications underlying cellular
networks. A non-cooperative game, where each D2D transmitter and a cellular user select their own
transmit power level independently, is analyzed to minimize their user-serving cost function and
achieve a target signal to interference-plus-noise-ratio (SINR) requirement. It is proved analytically
that the Nash equilibrium point of the game exists and it is unique under certain constraints.
Numerical results verify the analysis and demonstrate the effectiveness of the proposed game
with variant system conditions, such as path loss exponents, target SINR, interference caused by the
cellular user, pricing coefficients, and sigmoid control parameter.
capacity for current mobile broadband. Therefore, the radio access technology (RAT) should be made
available for 5G devices to help in distinct situations, for example device-to-device communications
(D2D) and multi-hops. This paper presents ultra-wideband channel measurements for millimeter
wave bands at 19, 28, and 38 GHz. We used an ultra-wideband channel sounder (1 GHz bandwidth)
in an indoor to outdoor (I2O) environment for non-line-of-sight (NLOS) scenarios. In an NLOS
environment, there is no direct path (line of sight), and all of the contributed paths are received from
different physical objects by refection propagation phenomena. Hence, in this work, a directional
horn antenna (high gain) was used at the transmitter, while an omnidirectional antenna was used at
the receiver to collect the radio signals from all directions. The path loss and temporal dispersion
were examined based on the acquired measurement data—the 5G propagation characteristics.
Two different path loss models were used, namely close-in (CI) free space reference distance and
alpha-beta-gamma (ABG) models. The time dispersion parameters were provided based on a mean
excess delay, a root mean square (RMS) delay spread, and a maximum excess delay. The path loss
exponent for this NLOS specific environment was found to be low for all of the proposed frequencies,
and the RMS delay spread values were less than 30 ns for all of the measured frequencies, and the
average RMS delay spread values were 19.2, 19.3, and 20.3 ns for 19, 28, and 38 GHz frequencies,
respectively. Moreover, the mean excess delay values were found also at 26.1, 25.8, and 27.3 ns for
19, 28, and 38 GHz frequencies, respectively. The propagation signal through the NLOS channel at
19, 28, and 38 GHz was strong with a low delay; it is concluded that these bands are reliable for 5G
systems in short-range applications.
sigmoid cost function is studied for device-to-device (D2D) communications underlying cellular
networks. A non-cooperative game, where each D2D transmitter and a cellular user select their own
transmit power level independently, is analyzed to minimize their user-serving cost function and
achieve a target signal to interference-plus-noise-ratio (SINR) requirement. It is proved analytically
that the Nash equilibrium point of the game exists and it is unique under certain constraints.
Numerical results verify the analysis and demonstrate the effectiveness of the proposed game
with variant system conditions, such as path loss exponents, target SINR, interference caused by the
cellular user, pricing coefficients, and sigmoid control parameter.