Signal Interference in WiFi and ZigBee Networks

Signal Interference in WiFi and ZigBee Networks
Author: Gaotao Shi
Publisher: Springer
Total Pages: 96
Release: 2016-10-24
Genre: Technology & Engineering
ISBN: 3319478060
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This book systematically summarizes the fundamentals of WiFi and ZigBee from different levels and provides the detailed theoretical and experimental results for signal interference between these two wireless data transmission technologies. The existing mechanisms and methods of interference mitigation, avoidance and co-existence are carefully explored. Both collaboration and cross-technology communication between WiFi and ZigBee are also introduced as key research trends. Due to the popularity of WiFi and ZigBee, which share the same ISM frequency band, interference is a common problem and addressed in a wide range of literature. This book condenses the newest research results into an approachable format. This is an essential resource for professionals and students in wireless networks as well as network engineers, designers, or planners seeking a backbone of knowledge in WiFi and ZigBee networks.

Experimental Analysis of the Interference Impact of Wi-Fi on ZigBee Using Cognitive Radio

Experimental Analysis of the Interference Impact of Wi-Fi on ZigBee Using Cognitive Radio
Author: Harvy Younan
Publisher:
Total Pages: 182
Release: 2011
Genre: Local area networks (Computer networks)
ISBN: 9781267309129
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Abstract: The increase of ZigBee popularity and usage in different Home Area Networks (HAN) exert a new challenge for operating ZigBee in an environment that is already using Wi-Fi. Sharing the spectrum between these two wireless technologies affect the functionality of ZigBee as it may cause a high packet error rate (PER) and major drop in the throughput. In this thesis we studied the effect of Wi-Fi interference on ZigBee channels by using the Cognitive Radio as Spectrum Analyzer and computed the packet error rate of each of the ZigBee channels. The results that we have obtained contradict the previous analytical and simulation results in which the effect of Wi-Fi on ZigBee has been studied. In the previous works, the authors assumed that the in-band interference signal of the Wi-Fi is a limited Adaptive White Gaussian Noise (AWGN). Therefore, their results were based only on the interference level on each of the ZigBee channels. In this work, we prove that the aforementioned assumption does not hold in all cases. Therefore, the obtained results are based on the interference level and distribution of the interference on each of the ZigBee channels.

ZigBee Wireless Networks and Transceivers

ZigBee Wireless Networks and Transceivers
Author: Shahin Farahani
Publisher: Newnes
Total Pages: 364
Release: 2011-04-08
Genre: Technology & Engineering
ISBN: 008055847X
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ZigBee is a short-range wireless networking standard backed by such industry leaders as Motorola, Texas Instruments, Philips, Samsung, Siemens, Freescale, etc. It supports mesh networking, each node can transmit and receive data, offers high security and robustness, and is being rapidly adopted in industrial, control/monitoring, and medical applications. This book will explain the ZigBee protocol, discuss the design of ZigBee hardware, and describe how to design and implement ZigBee networks. The book has a dedicated website for the latest technical updates, ZigBee networking calculators, and additional materials. Dr. Farahani is a ZigBee system engineer for Freescale semiconductors Inc. The book comes with a dedicated website that contains additional resources and calculators: http://www.learnZigBee.com Provides a comprehensive overview of ZigBee technology and networking, from RF/physical layer considerations to application layer development Discusses ZigBee security features such as encryption Describes how ZigBee can be used in location detection applications Explores techniques for ZigBee co-existence with other wireless technologies such as 802.11 and Bluetooth The book comes with a dedicated website that contains additional resources and calculators: http://www.learnZigBee.com

Embracing Interference in Wireless Systems

Embracing Interference in Wireless Systems
Author: Shyamnath Gollakota
Publisher: Morgan & Claypool Publishers
Total Pages: 246
Release: 2014-06-01
Genre: Computers
ISBN: 1627054766
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The wireless medium is a shared resource. If nearby devices transmit at the same time, their signals interfere, resulting in a collision. In traditional networks, collisions cause the loss of the transmitted information. For this reason, wireless networks have been designed with the assumption that interference is intrinsically harmful and must be avoided. This book, a revised version of the author's award-winning Ph.D. dissertation, takes an alternate approach: Instead of viewing interference as an inherently counterproductive phenomenon that should to be avoided, we design practical systems that transform interference into a harmless, and even a beneficial phenomenon. To achieve this goal, we consider how wireless signals interact when they interfere, and use this understanding in our system designs. Specifically, when interference occurs, the signals get mixed on the wireless medium. By understanding the parameters of this mixing, we can invert the mixing and decode the interfered packets; thus, making interference harmless. Furthermore, we can control this mixing process to create strategic interference that allow decodability at a particular receiver of interest, but prevent decodability at unintended receivers and adversaries. Hence, we can transform interference into a beneficial phenomenon that provides security. Building on this approach, we make four main contributions: We present the first WiFi receiver that can successfully reconstruct the transmitted information in the presence of packet collisions. Next, we introduce a WiFi receiver design that can decode in the presence of high-power cross-technology interference from devices like baby monitors, cordless phones, microwave ovens, or even unknown technologies. We then show how we can harness interference to improve security. In particular, we develop the first system that secures an insecure medical implant without any modification to the implant itself. Finally, we present a solution that establishes secure connections between any two WiFi devices, without having users enter passwords or use pre-shared secret keys.

Coexisting problems for wireless sensor networks working in 2.4 GHz frequency band

Coexisting problems for wireless sensor networks working in 2.4 GHz frequency band
Author: Vikram Kulkarni
Publisher: GRIN Verlag
Total Pages: 136
Release: 2019-12-03
Genre: Computers
ISBN: 3346075338
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Document from the year 2019 in the subject Computer Science - Internet, New Technologies, , course: Wireless Sensor Networks, Home Area Networks, language: English, abstract: The objectives of this research are: To propose a scheme to estimate the future interference and enable efficient channel switching mechanism to avoid interference for Wireless Sensor Network (WSN) as per the latency requirements specified by Smart Grid (SG). To propose an algorithm for efficient data recovery mechanism so that ZigBee devices can quickly familiarize with the encoding according to the highly dynamic WiFi traffic. To propose an efficient frequency shifting mechanism for different frame sizes of data under interference conditions to guarantee the reliable data transmission within the delay requirements of the SG. To propose an effective mechanism to guarantee the ZigBee communications within the maximum tolerable delay under the coexistence of WiFi for carrying out effective smart home solutions. To propose an algorithm based on effective transmission power control to increase WSN life time under coexistence scenarios for efficient monitoring and controlling purposes at smart homes. With the introduction of Information and Data-Communication Technology (ICT) to the present electrical power systems, the traditional electrical-grid system is becoming more intelligent and adaptive. The ICT successfully establishes bi-directional communication between Utility companies and the consumer for improving the generation and utilization of power. Wireless Sensor Network (WSN) is efficiently utilized by wide-ranging Smart Grid (SG) applications. Despite many advantages, WSN faces a challenge of avoiding interference experiencing from other coexisting wireless technologies working in the 2.4GHz unlicensed frequency band. Providing support for WSN in terms of avoiding interference is a very challenging issue due to the dynamic wireless communication environment and extremely limited resources. In the present thesis, the problem of interference experienced by WSN in 2.4GHz has been investigated. The challenges, limitations and requirements for avoiding the interference for WSN working in the vicinity of other technologies like WiFi and Bluetooth have been identified. As a result of the literature survey carried out, it was identified that proper channel se-lection and channel prioritization for WSNs working in the coexisting environment had not been adequately developed till then. Hence, there was a requirement for addressing these issues. The proposed schemes in this thesis are based on simulation results obtained.

ZigBee Network Protocols and Applications

ZigBee Network Protocols and Applications
Author: Chonggang Wang
Publisher: CRC Press
Total Pages: 378
Release: 2016-04-19
Genre: Computers
ISBN: 1439816026
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Compared with other wireless communication technologies, such as Bluetooth, WiFi, and UWB, ZigBee is a far more reliable, affordable, and energy-efficient option. It is also the only global wireless communication standard for easily deployed, low-power consumption products.ZigBee Network Protocols and Applications provides detailed descriptions of

Interference in Large Wireless Networks

Interference in Large Wireless Networks
Author: Martin Haenggi
Publisher: Now Publishers Inc
Total Pages: 136
Release: 2009
Genre: Wireless communication systems
ISBN: 1601982984
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Since interference is the main performance-limiting factor in most wireless networks, it is crucial to characterize the interference statistics. The main two determinants of the interference are the network geometry (spatial distribution of concurrently transmitting nodes) and the path loss law (signal attenuation with distance). For certain classes of node distributions, most notably Poisson point processes, and attenuation laws, closed-form results are available, for both the interference itself as well as the signal-to-interference ratios, which determine the network performance. This monograph presents an overview of these results and gives an introduction to the analytical techniques used in their derivation. The node distribution models range from lattices to homogeneous and clustered Poisson models to general motion-invariant ones. The analysis of the more general models requires the use of Palm theory, in particular conditional probability generating functionals, which are briefly introduced in the appendix.

Cross-Technology Coexistence Design for Wireless Networks

Cross-Technology Coexistence Design for Wireless Networks
Author: Junmei Yao
Publisher: Springer Nature
Total Pages: 77
Release: 2023-05-22
Genre: Computers
ISBN: 9819916704
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This book introduces readers to the fundamentals of the cross-technology coexistence problem in heterogeneous wireless networks. It also highlights a range of mechanisms designed to combat this problem and improve network performance, including protocol design, theoretical analysis, and experimental evaluation. In turn, the book proposes three mechanisms that can be combined to combat the cross-technology coexistence problem and improve network performance. First, the authors present a fast signal identification method. It provides the basis for the subsequent protocol design and allows heterogeneous devices to adopt proper transmission strategies. Second, the authors present two cross-technology interference management mechanisms in both the time domain and the frequency domain, which can mitigate interference and increase transmission opportunities for heterogeneous devices, thus improving network performance. Third, they present a cross-technology communication mechanism based on symbol-level energy modulation, which allows heterogeneous devices to transmit information directly without a gateway, improving transmission efficiency and paving the way for new applications in IoT scenarios. Lastly, they outline several potential research directions to further improve the efficiency of cross-technology coexistence. This book is intended for researchers, computer scientists, and engineers who are interested in the research areas of wireless networking, wireless communication, mobile computing, and Internet of Things. Advanced-level students studying these topics will benefit from the book as well.

Zigbee Wireless Networking

Zigbee Wireless Networking
Author: Drew Gislason
Publisher: Newnes
Total Pages: 442
Release: 2008-10-09
Genre: Technology & Engineering
ISBN: 0080558623
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ZigBee is a standard based on the IEEE 802.15.4 standard for wireless personal networks. This standard allows for the creation of very lost cost and low power networks - these applications run for years rather than months. These networks are created from sensors and actuators and can wireless control many electrical products such as remote controls, medical, industrial, and security sensors. Hundreds of companies are creating applications including Mitsubishi, Motorola, Freescale, and Siemens. This book is written for engineers who plan to develop ZigBee applications and networks, to understand how they work, and to evaluate this technology to see if it is appropriate to a particular project. This book does not simply state facts but explains what ZigBee can do through detailed code examples. Details how to plan and develop applications and networks Zigbee sensors have many applications including industrial automation, medical sensing, remote controls, and security Hot topic for today's electrical engineer because it is low cost and low power

Smart Grid Fundamentals

Smart Grid Fundamentals
Author: Radian Belu
Publisher: CRC Press
Total Pages: 635
Release: 2022-02-18
Genre: Technology & Engineering
ISBN: 1482256703
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The textbook provides a comprehensive overview of smart grids, their role in the development of electricity systems, as well as issues and problems related to smart grid evolution, operation, management, control, protection, entities, and components. The book is divided in eleven chapters, covering core topics such as energy, and environmental issues, basic of power systems, and introduction to renewable energy, distributed generation and energy storage, smart grid challenges, benefits, and divers, smart power transmission and distribution. It includes chapters focusing on smart grid communication, power flow analysis, smart grid design tools, energy management and microgrids. Each chapter ends with several practical and advanced problems that instilling critical thinking and applies to industrial applications. The book can be used as an introductory and basic textbook, reference and training resource by engineers, students, faculty, and interested readers to gain the essential knowledge of the power and energy systems, smart grid fundamentals, concepts and features, as well as the main energy technologies, including how they work and operate, characteristics, and they are evaluated and selected for specific applications.