scholarly journals Performance Analysis of Interference-Aware Multi-Packet Reception Networks

Electronics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 665
Author(s):  
Antonio Furtado ◽  
Rodolfo Oliveira ◽  
Luis Bernardo ◽  
Rui Dinis
Keyword(s):  
Wireless Networks ◽  
Wireless Network ◽  
Communication Systems ◽  
Network Performance ◽  
Network Control ◽  
Wireless Communication Systems ◽  
Single Radio ◽  
Research Initiatives ◽  
Decentralized Wireless Networks ◽  
The Impact

Decentralized wireless networks are gaining increasing popularity as they do not need a fixed infrastructure. Simultaneously, multiple research initiatives have led to different findings at the PHY layer of the wireless communication systems, which include Multi-Packet Reception (MPR) techniques that enable a receiver to decode multiple packets that are transmitted simultaneously. However, the distributed nature of decentralized wireless networks demands different network control policies that should take into account the MPR capabilities to increase the network performance. This work studies the performance of a wireless network composed of multiple transmitters that are willing to transmit to a single receiver. This receiver has MPR capability and adopts an Energy-based Sensing (EBS) technique to enable uplink users’ transmissions without interfering with the ongoing transmissions from other transmitters. The first remark to be made is that the MPR technique performance depends on the channel propagation conditions and on the amount of time the receiver needs to detect the spectrum’s occupancy state. However, it is shown that by increasing the number of samples needed to increase the sensing accuracy, the receiver may degrade its throughput, namely if the receiver is equipped with a single radio, that is sequentially used for sensing and transmitting (split-phase operation). The results presented in the paper show the impact of the channel propagation condition and EBS parameterization on wireless network throughput and the cases where the receiver MPR capture performance is greatly improved by the use of a spectrum sensing technique.

Admission Control Scheme for Reducing Signaling Storm in Wireless Network

2014 ◽  
Vol 556-562 ◽  
pp. 5427-5431
Author(s):  
Xiao Kui Chen ◽  
Zhao Ming Lu ◽  
Zhi Qun Hu ◽  
Xiang Ming Wen ◽  
Zhen Hai Zhang ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Wireless Communication ◽  
Wireless Network ◽  
Admission Control ◽  
Communication Systems ◽  
Wireless Communication Systems ◽  
Qos Negotiation ◽  
Control Scheme ◽  
The Impact ◽  
Admission Control Scheme

Reducing signaling storm in wireless networks has become a major goal in designing today’s wireless communication systems. In order to reduce signaling storm, this paper addresses the issues of scheduling the signaling resources in wireless networks subject to both quality of service (QoS) and priority constraints. The applications in wireless communication systems are divided into three types,namely always-on applications, voice applications and the other applications. For all the applications, an admission control scheme is proposed that incorporates the reconfiguration of idle resources and the QoS negotiation. The QoS negotiation usually contains the following parts, QoS reduction of the new application, QoS reduction of the applications which have accessed to the network and the resources compulsory possession. When the signaling resources are limited, the proposed admission control scheme can improve the successful access rate of voice applications and reduce the impact of signaling storm in wireless network.

Demand of Wireless Network and Security in Current Research

2015 ◽  
Vol 14 (6) ◽  
pp. 5809-5813
Author(s):  
Abhishek Prabhakar ◽  
Amod Tiwari ◽  
Vinay Kumar Pathak
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Wireless Network ◽  
Network Performance ◽  
Wireless Security ◽  
Human Intervention ◽  
Unauthorized Access ◽  
Quality Of Service Parameters ◽  
Wireless Infrastructure

Wireless security is the prevention of unauthorized access to computers using wireless networks .The trends in wireless networks over the last few years is same as growth of internet. Wireless networks have reduced the human intervention for accessing data at various sites .It is achieved by replacing wired infrastructure with wireless infrastructure. Some of the key challenges in wireless networks are Signal weakening, movement, increase data rate, minimizing size and cost, security of user and QoS (Quality of service) parameters... The goal of this paper is to minimize challenges that are in way of our understanding of wireless network and wireless network performance.

scholarly journals Spherical Dielectric Resonator Antenna for 5G Application

2021 ◽  
Author(s):  
Ashok kumar ◽  
Rajveer Singh Yaduvanshi
Keyword(s):  
Wireless Networks ◽  
Wireless Communication ◽  
Theoretical Analysis ◽  
Dielectric Resonator ◽  
Communication Systems ◽  
Return Loss ◽  
Wireless Communication Systems ◽  
Dielectric Resonator Antenna ◽  
Good Match ◽  
Good For

Abstract In this article Spherical DRA has been formulated , simulated and proto type developed. The detailed theoretical analysis along with simulations and measured results at 5.8 GHz have been presented in this article. The SDRA at 5.8 GHz covering 5G frewuenci band. The proposed design antenna provides the gain of 7.3 dB and return loss -25 dB. The measured results are in good match with simulated result. The proposed SDRA are good for 5G wireless networks, as well as other sub-6 band in wireless communication systems.

scholarly journals Fast computation of the iteration-based simulation method - case study of non-coherent ask with shadowing

2017 ◽  
Vol 14 (3) ◽  
pp. 415-431 ◽  
Author(s):  
Vladimir Mladenovic ◽  
Sergey Makov ◽  
Yigang Cen ◽  
Miroslav Lutovac
Keyword(s):  
Numerical Methods ◽  
Probability Density ◽  
Communication Systems ◽  
Data Transfer ◽  
Joint Probability ◽  
Simulation Method ◽  
Wireless Communication Systems ◽  
Closed Form Solutions ◽  
The Impact

This article presents a new method of fast symbolic computations of very complex calculations, which are necessary for the analysis, simulation, and design of wireless communication systems using CAS (Computer Algebra System). CAS is applied to formulate hypotheses and define joint probability density functions of certain modulation technique. This is used to prepare for the semi-symbolic calculation to complete specify wireless system by using CAS. We have developed an iteration-based simulation method that aids to solve semisymbolic expressions and gives closed form solutions (with some parameters specified as numbers and some as symbols). So far, they are solved by numerical methods. Students can perform performance analysis and understand the processes in the data transfer. Engineers and researchers may have a better insight into the impact of the important parameters necessary to properly transmit and detect information unlike traditional numerical methods. The main contribution is to obtain solutions for the probability density function, and outage probability where no solution can be obtained using numerical methods. A strong emphasis is placed on very fast calculations that significantly save the time of analysis, simulation, and design.

A Framework for High-Speed Passenger Train Wireless Network Radio Evaluations

2019 ◽  
Author(s):  
Subharthi Banerjee ◽  
Michael Hempel ◽  
Naji Albakay ◽  
Pejman Ghasemzadeh ◽  
Hamid Sharif
Keyword(s):  
Wireless Network ◽  
Network Architecture ◽  
Communication Systems ◽  
High Speed ◽  
Network Performance ◽  
The United States ◽  
Base Station ◽  
Simulation Framework ◽  
Passenger Train ◽  
Past Experiences

By 2030, the United States Federal Transit Administration (FTA) plans to have High Speed Train (HST) systems deployed that span over 12,000 miles across the US. Given the rapidly accelerating growth in consumers demand for fast on-board Internet services, there is a need for a robust and dedicated railroad wireless network architecture for their onboard and Train-to-Ground (T2G) communication systems. And while there are several potential candidates for radio access technologies (RAT), a full understanding of the benefits and drawbacks of each is still missing. We therefore have developed and studied a simulation framework that offers railroads the ability to perform an in-depth evaluation of capabilities for different RATs in terms of interoperability, throughput, handover and bit error rate for various user-driven scenarios. The framework is capable of studying and analyzing conditions such as network performance at different train velocities, base station spacing requirements, as well as analyzing US-specific geographical or track-related architectural scenarios. Our Past experiences in researching railroad wireless solutions have shown that wireless network performance varies widely in environments like tunnels, viaducts, bridges, stations, etc. The simulator offers the network designers significant flexibility in terms of defining parameters to create simulation scenarios and obtaining a detailed understanding of network performance. The work has created a novel, flexible and adaptable simulation framework for high-speed passenger train wireless network evaluation. The simulation tool supports 220MHz-100GHz systems for simulating LTE and 5G-New Radio (5G-NR), and it can support other technologies such as 220MHz PTC, in a time-variant channel. In this paper we present the architecture and the capabilities of the simulator with a sample scenario evaluation. The developed framework aims to support HST wireless communication designers to conduct more detailed analyses and to make more informed decisions in optimizing system deployments.

Multiuser Beam Index Modulation Wireless Transmission with Analogue Beamforming Networks

2020 ◽  
Vol 13 (3) ◽  
pp. 322-330
Author(s):  
Xu He ◽  
Yuan Ding ◽  
Xingwang Li
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Signal To Noise Ratio ◽  
Wireless Communication Systems ◽  
High Signal ◽  
Communication Scheme ◽  
Single Radio ◽  
Multiple Receiver ◽  
Rf Chain ◽  
Index Modulation

Background: The multiuser scenarios using the recently proposed wireless communication scheme, namely Beam Index Modulation (BIM), are investigated in this paper. Methods: Both transmitter node and multiple receiver nodes are equipped with analogue beamforming networks, transforming physical wireless propagation channels to virtue channels in beam domain. Results: Under the non-line-of-sight (nLoS) multi-scattered channel conditions, which are likely the cases for some future wireless communication systems operating at higher frequency bands. Conclusion: It has been proved, both through simulations and experiment, at 10 GHz in an indoor environment, that the proposed BIM is able to enhance the system performance at high Signal-to-Noise Ratio (SNR) scenarios, with regard to the sum spectral efficiency, with only a single Radio Frequency (RF) chain.

Adaptive Complex Filtering for Narrowband Jamming Mitigation in Resource-Constrained Wireless Networks

2020 ◽  
Vol 12 (2) ◽  
pp. 46-58
Author(s):  
Zlatka Valkova Valkova-Jarvis ◽  
Dimitriya Angelova Mihaylova ◽  
Albena Dimitrova Mihovska ◽  
Georgi Lubenov Iliev
Keyword(s):  
Wireless Networks ◽  
Physical Layer Security ◽  
Communication Systems ◽  
Notch Filter ◽  
Wireless Communication Systems ◽  
Resource Constrained ◽  
Central Frequency ◽  
Jamming Attacks ◽  
First Order ◽  
Low Power Wireless Networks

Jamming attacks present a major challenge for the physical layer security of wireless communication systems. Among the large number of existing methods for jamming mitigation, filtering is a simple but promisingly effective solution that can be applied in resource-constrained and low-power wireless networks. In this article, a first-order adaptive complex narrowband notch filter is proposed for use against high-power narrowband jamming attacks. The central frequency of the filter is adaptively adjustable to match the interfering frequency. This enables the proposed solution to perform effectively in the presence of a jammer whose frequency varies in fixed or random time periods. The simulation results demonstrate the filter's behavior and the efficiency of the proposed technique.

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