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wireless sensor network 2010
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详细说明： Wireless sensor networks (WSNs) have attracted a wide range of disciplines where close interactions with the physical world are essential. The distributed sensing capabilities and the ease of deployment provided by a wireless communication paradigm make WSNs an important component of our daily lives. By providing distributed, real-time information from the physical world, WSNs extend the reach of current cyber infrastructures to the physical world. WSNs consist of tiny sensor nodes, which act as both data generators and network relays. Each node consists of sensor(s), a microprocessor, and a transceiver. Through the wide range of sensors available for tight integration, capturing data from a physical phenomenon becomes standard. Through on-board microprocessors, sensor nodes can be programmed to accomplish complex tasks rather than transmit only what they observe. The transceiver provides wireless connectivity to communicate the observed phenomena of interest. Sensor nodes are generally stationary and are powered by limited capacity batteries. Therefore, although the locations of the nodes do not change, the network topology dynamically changes due to the power management activities of the sensor nodes. To save energy, nodes aggressively switch their transceivers off and essentially become disconnected from the network. In this dynamic environment, it is a major challenge to provide connectivity of the network while minimizing the energy consumption. The energy-efficient operation of WSNs, however, provides significantly long lifetimes that surpass any system that relies on batteries. In March 2002, our survey paper “Wireless sensor networks: A survey” appeared in the Elsevier jour- nal Computer Networks, with a much shorter and concise version appearing in IEEE Communications Magazine in August 2002. Over the years, both of these papers were among the top 10 downloaded papers from Elsevier and IEEE Communication Society (ComSoc) journals with over 8000 citations in total. 1 Since then, the research on the unique challenges of WSNs has accelerated significantly. In the last decade, promising results have been obtained through these research activities, which have enabled the development and manufacture of sophisticated products. This, as a result, eventually created a brand- new market powered by the WSN phenomenon. Throughout these years, the deployment of WSNs has become a reality. Consequently, the research community has gained significant experience through these deployments. Furthermore, many researchers are currently engaged in developing solutions that address the unique challenges of the present WSNs and envision new WSNs such as wireless underwater and underground sensor networks. We have contributed to this research over the years through numerous articles and four additional survey/roadmap papers on wireless sensor actor networks, underwater acoustic networks, wireless underground sensor networks, and wireless multimedia sensor networks which were published in different years within the last decade. In summer 2003, we started to work on our second survey paper on WSNs to revisit the state-of-the- art solutions since the dawn of this phenomenon. The large volume of work and the interest in both academia and industry have motivated us to significantly enhance this survey to create this book, which is targeted at teaching graduate students, stimulating them for new research ideas, as well as providing academic and industry professionals with a thorough overview and in-depth understanding of the state- of-the-art in wireless sensor networking and how they can develop new ideas to advance this technology as well as support emerging applications and services. The book provides a comprehensive coverage of 1 According to Google Scholar as of October 2009.xx Preface the present research on WSNs as well as their applications and their improvements in numerous fields. This book covers several major research results including the authors’ own contributions as well as all standardization committee decisions in a cohesive and unified form. Due to the sheer amount of work that has been published over the last decade, obviously it is not possible to cover every single solution and any lack thereof is unintentional. The contents of the book mainly follow the TCP/IP stack starting from the physical layer and covering each protocol layer in detail. Moreover, cross-layer solutions as well as services such as synchronization, localization, and topology control are discussed in detail. Special cases of WSNs are also introduced. Functionalities and existing protocols and algorithms are covered in depth. The aim is to teach the readers what already exists and how these networks can further be improved and advanced by pointing out grand research challenges in the final chapter of the book. Chapter 1 is a comprehensive introduction to WSNs, including sensor platforms and network architectures. Chapter 2 summarizes the existing applications of WSNs ranging from military solutions to home applications. Chapter 3 provides a comprehensive coverage of the characteristics, critical design factors, and constraints of WSNs. Chapter 4 studies the physical layer of WSNs, including physical layer technologies, wireless communication characteristics, and existing standards at the WSN physical layer. Chapter 5 presents various medium access control (MAC) protocols for WSNs, with a special focus on the basic carrier sense multiple access with collision avoidance (CSMA/CA) techniques used extensively at this layer, as well as distinct solutions ranging from CSMA/CA variants, time division multiple access (TDMA)-based MAC, and their hybrid counterparts. Chapter 6 focuses on error control techniques in WSNs as well as their impact on energy-efficient communication. Along with Chapter 5, these two chapters provide a comprehensive evaluation of the link layer in WSNs. Chapter 7 is dedicated to routing protocols for WSNs. The extensive number of solutions at this layer are studied in four main classes: data-centric, hierarchical, geographical, and quality of service (QoS)- based routing protocols. Chapter 8 firstly introduces the challenges of transport layer solutions and then describes the protocols. Chapter 9 introduces the cross-layer interactions between each layer and their impacts on communication performance. Moreover, cross-layer communication approaches are explained in detail. Chapter 10 discusses time synchronization challenges and several approaches that have been designed to address these challenges. Chapter 11 presents the challenges for localization and studies them in three classes: ranging techniques, range-based localization protocols, and range- free localization protocols. Chapter 12 is organized to capture the topology management solutions in WSNs. More specifically, deployment, power control, activity, scheduling, and clustering solutions are explained. Chapter 13 introduces the concept of wireless sensor–actor networks (WSANs) and their characteristics. In particular, the coordination issues between sensors and actors as well as between different actors are highlighted along with suitable solutions. Moreover, the communication issues in WSANs are discussed. Chapter 14 presents wireless multimedia sensor networks (WMSNs) along with their challenges and various architectures. In addition, the existing multimedia sensor network platforms are introduced, and the protocols are described in the various layers following the general structure of the book. Chapter 15 is dedicated to underwater wireless sensor networks (UWSNs) with a major focus on the impacts of the underwater environment. The basics of underwater acoustic propagation are studied and the corresponding solutions at each layer of the protocol stack are summarized. Chapter 16 introduces wireless underground sensor networks (WUSNs) and various applications for these networks. In particular, WUSNs in soil and WUSNs in mines and tunnels are described. The channel properties in both these cases are studied. Furthermore, the existing challenges in the communication layers are described. Finally, Chapter 17 discusses the grand challenges that still exist for the proliferation of WSNs. It is a major task and challenge to produce a textbook. Although usually the authors carry the major burden, there are several other key people involved in publishing the book. Our foremost thanks go to Birgit Gruber from John Wiley & Sons who initiated the entire idea of producing this book. Tiina Ruonamaa, Sarah Tilley, and Anna Smart at John Wiley & Sons have been incredibly helpful, persistent,Preface xxi and patient. Their assistance, ideas, dedication, and support for the creation of this book will always be greatly appreciated. We also thank several individuals who indirectly or directly contributed to our book. In particular, our sincere thanks go to Özgur B. Akan, Tommaso Melodia, Dario Pompili, Weilian Su, Eylem Ekici, Cagri Gungor, Kaushik R. Chowdhury, Xin Dong, and Agnelo R. Silva for their help. I (MCV) would like to specifically thank the numerous professors who have inspired me throughout my education in both Bilkent University, Ankara, Turkey and Georgia Institute of Technology, Atlanta, GA. I would like to thank my colleagues and friends at the University of Nebraska–Lincoln and the Department of Computer Science and Engineering for the environment they created during the development of this book. I am especially thankful to my PhD advisor, Professor Ian F. Akyildiz, who introduced me to the challenges of WSNs. I wholeheartedly thank him for his strong guidance, friendship, and trust during my PhD as well as my career thereafter. I would also like to express my deep appreciation to my wife, Demet, for her love, exceptional support, constructive critiques, and her sacrifices that made the creation of this book possible. I am thankful to my mom, Ayla, for the love, support, and encouragement that only a mother can provide. Finally, this book is dedicated to the loving memory of my dad, Mehmet Vuran (or Hem¸serim as we used to call each other). He was the greatest driving force for the realization of this book as well as many other accomplishments in my life. I (IFA) would like to specifically thank my wife and children for their support throughout all these years. Without their continuous love, understanding, and tolerance, none of these could have been achieved. Also my past and present PhD students, who became part of my family over the last 25 years, deserve the highest and sincerest thanks for being in my life and letting me enjoy the research to the fullest with them. The feeling of seeing how they developed in their careers over the years is indescribable and one of the best satisfactions in my life. Their research results contributed a great deal to the contents of this book as well. Ian F. Akyildiz and Mehmet Can Vuran ...展开收缩
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