2016 11th International Conference on Computer Engineering & Systems (ICCES), 2016
Due to the multi-tier heterogeneous nature of the 5G cellular networks, where the small cells and... more Due to the multi-tier heterogeneous nature of the 5G cellular networks, where the small cells and the D2D pairs are underlaied in the macrocell, Centralized methods for resource allocation will be very complex. In this paper a distributed algorithm using auction technique is adopted to maximize the datarate of the underlay layer users, while maintaining the interference in the macro tier within the acceptable range. The convergence of the algorithm, and other parameters is investigated, also the effectiveness of the solution compared to the central solution is studied.
Multi-hop Relay networks are proposed to fulfill the demanding coverage and capacity requirements... more Multi-hop Relay networks are proposed to fulfill the demanding coverage and capacity requirements for current applications in a cost efficient way. It can be used in IMT-Advanced technologies such as 3GPP LTE-Advanced. In this paper, LTE-A Uplink performance will be improved using Synchronous direct and multi-hop transmission (SDMT) between user equipment and Base Station. Also the effect of adding RS to the network and its position will be discussed. The total LTE-A uplink Throughput, average throughput per user, and Mean File Transfer Time (MFTT) in the LTE-A network are considered as performance measures. This is done and measured as a function of different arrival rates of UEs assigned from random positions in the cell. Adaptive Modulation, and Coding (AMC) scheme with high order 2x4MIMO is used to maximize network throughput with low bit error rate (BER). Simulation results show LTE-A uplink performance improvement using 2x4MIMO-AMC and SDMT scheme with RS at 50% of cell radius...
VoIP applications are being widely used in today's networks challenging their capabilities to... more VoIP applications are being widely used in today's networks challenging their capabilities to provide a good quality of experience level to the users. In particular, new wireless broadband technologies, such as WiMAX, deployed and their performance needs to assess in order to check the performance levels of VoIP services. The QoS is the main issue of implementation VOIP over WiMAX networks. This paper makes an effort to study the performance evaluation of VoIP for fixed users, as well as, the variation of the QoS parameters. The experimental results had showed that using sector antenna for both BS and SS and reduce the distance between them, increase the average MOS and decrease the average packet end-to-end delay.
International journal of electrical and computer engineering systems
Nonorthogonal multiple access (NOMA) is a significant technology in radio resource sharing and it... more Nonorthogonal multiple access (NOMA) is a significant technology in radio resource sharing and it has been recognized as a favorable method in fifth-generation (5G) wireless networks to meet the requirements of system capacity, service latency, and user connectivity. Many schemes for NOMA have been proposed in the last few years. such as transmitter linear spreading-based NOMA as a code domain, as well as a linear minimum mean square error (LMMSE), parallel interference cancellation (PIC), and serial interference cancellation (SIC) with power allocation and grouping as a power domain at the receiver side for uplink NOMA. This work aims to evaluate the performance of multiple types of linear spreading-based NOMA schemes. Simulations are achieved for the error-rate performance evaluation of these NOMA schemes, received signal after detection, and received signal and effect of every user on the other. Evaluating the performance of these technologies with comparison is also achieved thr...
2019 7th International Japan-Africa Conference on Electronics, Communications, and Computations, (JAC-ECC)
In heterogeneous networks (HetNet), the handover is an important process that affects the quality... more In heterogeneous networks (HetNet), the handover is an important process that affects the quality of service (QoS) performance. The decision of handover is the objective rule in the handover process. The main objective of this paper is to propose a fuzzy logic model to calculate the QoS for LTE networks based on handover process. The fuzzy logic model is designed for macro or small cell construction and use Signal to Interference-Noise Ratio (SINR), data rate, load, distance between user and base station, and velocity of user equipment as parameters. To reduce the number of rules in the fuzzy model, the proposed design is arranged as a combination of multi stage fuzzy logic. This will simplify the design for large input parameters, i.e., reduce the design complexity. The new proposed model consists of three stages to calculate the QoS. The design will find its application in VOIP, HTTP, Videos, and Email services. Matlab simulation of the proposed design provided a 100% QoS under the constraints of high throughput, low network delay, low jitter, and low loss rate.
In recent years, SDN technology has been applied to several networks such as wide area network (W... more In recent years, SDN technology has been applied to several networks such as wide area network (WAN). IT provides many benefits, such as: enhancing data transfer, promoting Application performance and reducing deployment costs. Software Defined-WAN networks lack studies and references. This paper introduced a system for SD-WAN network using PH/PH/C queues. It concentrates on the study of algebraic estimates the probability distribution of the system states. The Matrix-Geometric solution procedure of a phase type distribution queue with first-come first-served discipline is used.
2020 37th National Radio Science Conference (NRSC), 2020
The wireless sensor network (WSN) is a network composed of spatially distributed sensors which co... more The wireless sensor network (WSN) is a network composed of spatially distributed sensors which communicate among themselves for detecting and recording the physical phenomenon (like temperature, sound, pollution levels, humidity, wind speed, pressure, and so on) and organizing the collected data at a central location. Due to the use of WSN in various applications, knowing the location of the object or event is one of the most important challenges in WSN, which is called the localization process. In this paper, received signal strength indicator (RSSI) and angle of arrival (AOA) algorithms are considered for the WSN localization process. Moreover, a new method based on AOA localization techniques with dynamic distance reference anchor has been presented and the problem of localization accuracy which is affected by environmental conditions is improved. The proposed algorithm is implemented into a near ground radio propagation channel of agriculture farm (short and tall grass). It is found that the new localization method provides the best results as compared with conventional methods.
2016 11th International Conference on Computer Engineering & Systems (ICCES), 2016
Due to the multi-tier heterogeneous nature of the 5G cellular networks, where the small cells and... more Due to the multi-tier heterogeneous nature of the 5G cellular networks, where the small cells and the D2D pairs are underlaied in the macrocell, Centralized methods for resource allocation will be very complex. In this paper a distributed algorithm using auction technique is adopted to maximize the datarate of the underlay layer users, while maintaining the interference in the macro tier within the acceptable range. The convergence of the algorithm, and other parameters is investigated, also the effectiveness of the solution compared to the central solution is studied.
Multi-hop Relay networks are proposed to fulfill the demanding coverage and capacity requirements... more Multi-hop Relay networks are proposed to fulfill the demanding coverage and capacity requirements for current applications in a cost efficient way. It can be used in IMT-Advanced technologies such as 3GPP LTE-Advanced. In this paper, LTE-A Uplink performance will be improved using Synchronous direct and multi-hop transmission (SDMT) between user equipment and Base Station. Also the effect of adding RS to the network and its position will be discussed. The total LTE-A uplink Throughput, average throughput per user, and Mean File Transfer Time (MFTT) in the LTE-A network are considered as performance measures. This is done and measured as a function of different arrival rates of UEs assigned from random positions in the cell. Adaptive Modulation, and Coding (AMC) scheme with high order 2x4MIMO is used to maximize network throughput with low bit error rate (BER). Simulation results show LTE-A uplink performance improvement using 2x4MIMO-AMC and SDMT scheme with RS at 50% of cell radius...
VoIP applications are being widely used in today's networks challenging their capabilities to... more VoIP applications are being widely used in today's networks challenging their capabilities to provide a good quality of experience level to the users. In particular, new wireless broadband technologies, such as WiMAX, deployed and their performance needs to assess in order to check the performance levels of VoIP services. The QoS is the main issue of implementation VOIP over WiMAX networks. This paper makes an effort to study the performance evaluation of VoIP for fixed users, as well as, the variation of the QoS parameters. The experimental results had showed that using sector antenna for both BS and SS and reduce the distance between them, increase the average MOS and decrease the average packet end-to-end delay.
International journal of electrical and computer engineering systems
Nonorthogonal multiple access (NOMA) is a significant technology in radio resource sharing and it... more Nonorthogonal multiple access (NOMA) is a significant technology in radio resource sharing and it has been recognized as a favorable method in fifth-generation (5G) wireless networks to meet the requirements of system capacity, service latency, and user connectivity. Many schemes for NOMA have been proposed in the last few years. such as transmitter linear spreading-based NOMA as a code domain, as well as a linear minimum mean square error (LMMSE), parallel interference cancellation (PIC), and serial interference cancellation (SIC) with power allocation and grouping as a power domain at the receiver side for uplink NOMA. This work aims to evaluate the performance of multiple types of linear spreading-based NOMA schemes. Simulations are achieved for the error-rate performance evaluation of these NOMA schemes, received signal after detection, and received signal and effect of every user on the other. Evaluating the performance of these technologies with comparison is also achieved thr...
2019 7th International Japan-Africa Conference on Electronics, Communications, and Computations, (JAC-ECC)
In heterogeneous networks (HetNet), the handover is an important process that affects the quality... more In heterogeneous networks (HetNet), the handover is an important process that affects the quality of service (QoS) performance. The decision of handover is the objective rule in the handover process. The main objective of this paper is to propose a fuzzy logic model to calculate the QoS for LTE networks based on handover process. The fuzzy logic model is designed for macro or small cell construction and use Signal to Interference-Noise Ratio (SINR), data rate, load, distance between user and base station, and velocity of user equipment as parameters. To reduce the number of rules in the fuzzy model, the proposed design is arranged as a combination of multi stage fuzzy logic. This will simplify the design for large input parameters, i.e., reduce the design complexity. The new proposed model consists of three stages to calculate the QoS. The design will find its application in VOIP, HTTP, Videos, and Email services. Matlab simulation of the proposed design provided a 100% QoS under the constraints of high throughput, low network delay, low jitter, and low loss rate.
In recent years, SDN technology has been applied to several networks such as wide area network (W... more In recent years, SDN technology has been applied to several networks such as wide area network (WAN). IT provides many benefits, such as: enhancing data transfer, promoting Application performance and reducing deployment costs. Software Defined-WAN networks lack studies and references. This paper introduced a system for SD-WAN network using PH/PH/C queues. It concentrates on the study of algebraic estimates the probability distribution of the system states. The Matrix-Geometric solution procedure of a phase type distribution queue with first-come first-served discipline is used.
2020 37th National Radio Science Conference (NRSC), 2020
The wireless sensor network (WSN) is a network composed of spatially distributed sensors which co... more The wireless sensor network (WSN) is a network composed of spatially distributed sensors which communicate among themselves for detecting and recording the physical phenomenon (like temperature, sound, pollution levels, humidity, wind speed, pressure, and so on) and organizing the collected data at a central location. Due to the use of WSN in various applications, knowing the location of the object or event is one of the most important challenges in WSN, which is called the localization process. In this paper, received signal strength indicator (RSSI) and angle of arrival (AOA) algorithms are considered for the WSN localization process. Moreover, a new method based on AOA localization techniques with dynamic distance reference anchor has been presented and the problem of localization accuracy which is affected by environmental conditions is improved. The proposed algorithm is implemented into a near ground radio propagation channel of agriculture farm (short and tall grass). It is found that the new localization method provides the best results as compared with conventional methods.
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