Showing papers on "Wireless WAN published in 2021"

Wireless sensor networks architectures and protocols

Abstract: Introduction to Wireless Sensor Networks Applications and Motivation Network Performance Objectives Contributions of this Book Organization of this Book The Development of Wireless Sensor Networks Early Wireless Networks Wireless Data Networks Wireless Sensor and Related Networks Conclusion The Physical Layer Some Physical Layer Examples A Practical Physical Layer for Wireless Sensor Networks Simulations and Results Conclusion The Data Link Layer Medium Access Control Techniques The Mediation Device System Analysis and Simulation Conclusion The Network Layer Some Network Design Examples A Wireless Sensor Network Design Employing a Cluster Tree Architecture Simulations Results Conclusion Practical Implementation Issues The Partitioning Decision Transducer Interfaces Time Base Accuracy and Average Power Consumption Conclusion Power Management Power Sources Loads Voltage Converters and Regulators Power Management Strategy Conclusion Antennas and the Definition of RF Performance Antennas RF Performance Definition and Measurement Conclusion Electromagnetic Compatibility EMC: The Problem Examples of Self-Interference The Physics Associated with EMC Problems Principles of Proper Layout The Layout Process Detective/Corrective Techniques Conclusion Electrostatic Discharge The Problem Physical Properties of the Electrostatic Discharge The Effects of ESD on Integrated Circuits Modeling and Test Standards Product Design to Minimize ESD Problems Conclusion Wireless Sensor Network Standards The IEEE 802.15.4 Low-Rate WPAN Standard The ZigBee Alliance The IEEE 1451.5 Wireless Smart Transducer Interface Standard Summary and Opportunities for Future Development Summary Opportunities for Future Development Appendix A--Signal Processing Worksystem (SPW) Appendix B--WinneuRFon Motivation System Requirements Supported Features Current Status and Achievement Simulation Method and More Potential Functionalities Proposal for Future Work Summary Appendix C--The MC13192: An Example Wireless Sensor Network Transceiver Integrated Circuit (IC)

Emerging Wireless LANs Wireless PANs and Wireless MANs

Abstract: This book introduces and explains current and emerging IEEE 802 wireless standards/drafts to readers, including IEEE wireless standards (Wireless LANs; Wireless PANs; and Wireless MANs. It also provides information on MAC (medium Access control) and the Physical layer protocols for all these standards/drafts with an emphasis on channel access and power management.

Introduction to Wireless Local Loop Broadband and Narrowband Systems

Abstract: Preface. Acknowledgments. Part One - Setting the Scene. Introduction. The Converging World of Telephony, Television, and Computers. Access Technologies. Part Two - Why Wireless? Telecommunications Environments World-Wide. The Economics of Wireless Versus Fixed. Wireless Local Loop Markets. Part Three - Technical Information about Wireless. Radio Propagation. Radio Systems. TDMA or CDMA. Part Four - Wireless Radio Technologies. Overview of Technologies. The Cordless Technologies. The Cellular Technologies. The Proprietary Technologies. The Broadband Technologies. Choosing the Right Technology. Looking at a Technology in Detail: CDMAOne. Part Five - Deploying Wireless Local Loop Systems. Getting a License. Choosing a Service Offering. Developing the Business Case. Rolling Out the Network. Case Study. The Future. List of Acronyms and Abbreviations. About the Author. Index.

Planar Multi-broadband Antenna for LTE/5G/GPS/GSM/UMTS and WLAN/WiMAX Wireless Applications

Abstract: In this paper, a simple planar multiband antenna design for wireless handsets is introduced. The proposed antenna can support four broad frequency bands, covering LTE/WWAN/GNSS/WiMAX/WLAN and several bands that are suggested for 5G systems. The proposed antenna design consists of a folded driven monopole strip, and a parasitic ground connected to the main ground with several etched slots on the ground plane. The parasitic ground in conjunction with the driven monopole slot helps to cover the lower band, including LTE700 and GSM bands, while the slots at the parasitic ground help to fully cover and tune other desired bands. The antenna is printed on a low-cost ultra-thin FR-4 substrate with a compact size of 135 mm $$\times$$ 60 mm $$\times$$ 0.5 mm, suitable for the state-of-the-art wireless handsets, such as smart-phones. The design procedure and measurement results of the antenna have been presented and discussed.

Conditional wlan-wwan handover

Abstract: Methods, systems, and devices for wireless communications are described that support techniques for handover between WLANs and WWANs. The described techniques provide for using cross-layer information to enhance the handovers.