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Author: Huan Tang Publisher: ISBN: 9781369202588 Category : Languages : en Pages :
Book Description
The rapid growth of mobile wireless data service continues to stimulate the investment and expansion of high-rate and bandwidth-efficient wireless network systems. High volume data traffics in modern wireless system can lead to network overload, congestion, and process delay, severely straining the limited resource and capability of cellular networks. As a result, new connection modes such as device-to-device (D2D) has emerged as potential means to alleviate traffic load on radio network controllers (RNC) and eNodeBs (eNBs). We investigated several technical aspects critical to D2D communications as an underlay within existing cellular networks. · Neighbor Discovery: One of the first steps in setting up D2D links involves pairing UEs that are in close proximity. This is accomplished during neighbor discovery process, where UEs will identify their neighbors for potential direct-link setup. To facilitate the deployment of D2D functionality to standard LTE cellular systems, it is necessary to explore neighbor discovery opportunities in existing LTE infrastructure. We developed neighbor discovery methods that are compatible with current protocols in 4G LTE networks. · Cochannel Interference Management: D2D communications can improve spectral efficiency of the cellular system by allowing D2D links share the same spectrum with cellular link. However, it also leads to a critical problem of interference management. As more advanced multi-antenna user equipment becomes widespread, precoding serves as an effective technique to combat cochannel interference. We proposed practical precoder selection strategies that utilize existing LTE codebook. To overcome channel estimation error, robust precoding techniques are further developed to guarantee cellular outage requirements within D2D underlaid cellular systems. · Resource Allocation: Resource allocation is an important topic for effective interference management across the network. For example, the eNB can allocate cellular resources to direct links that are far apart so as to reduce cochannel interference. We developed an efficient algorithm that optimizes resource allocation of D2D links across multiple D2D modes and cellular channels. With practical consideration of statistical CSI, we provided a general framework for optimizing channel and power allocation of D2D underlay with applicability to various channel fading models. Neighbor discovery, cochannel interference management and resource allocation are three successive, vital steps in setting up D2D communications in the cellular system. We proposed technical solutions to each phase with an emphasis on their compatibility with existing system architecture. Our study discloses huge potential of D2D as a practical solution to boost performances of cellular networks.
Author: Huan Tang Publisher: ISBN: 9781369202588 Category : Languages : en Pages :
Book Description
The rapid growth of mobile wireless data service continues to stimulate the investment and expansion of high-rate and bandwidth-efficient wireless network systems. High volume data traffics in modern wireless system can lead to network overload, congestion, and process delay, severely straining the limited resource and capability of cellular networks. As a result, new connection modes such as device-to-device (D2D) has emerged as potential means to alleviate traffic load on radio network controllers (RNC) and eNodeBs (eNBs). We investigated several technical aspects critical to D2D communications as an underlay within existing cellular networks. · Neighbor Discovery: One of the first steps in setting up D2D links involves pairing UEs that are in close proximity. This is accomplished during neighbor discovery process, where UEs will identify their neighbors for potential direct-link setup. To facilitate the deployment of D2D functionality to standard LTE cellular systems, it is necessary to explore neighbor discovery opportunities in existing LTE infrastructure. We developed neighbor discovery methods that are compatible with current protocols in 4G LTE networks. · Cochannel Interference Management: D2D communications can improve spectral efficiency of the cellular system by allowing D2D links share the same spectrum with cellular link. However, it also leads to a critical problem of interference management. As more advanced multi-antenna user equipment becomes widespread, precoding serves as an effective technique to combat cochannel interference. We proposed practical precoder selection strategies that utilize existing LTE codebook. To overcome channel estimation error, robust precoding techniques are further developed to guarantee cellular outage requirements within D2D underlaid cellular systems. · Resource Allocation: Resource allocation is an important topic for effective interference management across the network. For example, the eNB can allocate cellular resources to direct links that are far apart so as to reduce cochannel interference. We developed an efficient algorithm that optimizes resource allocation of D2D links across multiple D2D modes and cellular channels. With practical consideration of statistical CSI, we provided a general framework for optimizing channel and power allocation of D2D underlay with applicability to various channel fading models. Neighbor discovery, cochannel interference management and resource allocation are three successive, vital steps in setting up D2D communications in the cellular system. We proposed technical solutions to each phase with an emphasis on their compatibility with existing system architecture. Our study discloses huge potential of D2D as a practical solution to boost performances of cellular networks.
Author: Lingyang Song Publisher: Springer Science & Business Media ISBN: 1461481937 Category : Computers Languages : en Pages : 85
Book Description
Device-to-Device (D2D) communication will become a key feature supported by next generation cellular networks, a topic of enormous importance to modern communication. Currently, D2D serves as an underlay to the cellular network as a means to increase spectral efficiency. Although D2D communication brings large benefits in terms of system capacity, it also causes interference as well as increased computation complexity to cellular networks as a result of spectrum sharing. Thus, efficient resource management must be performed to guarantee a target performance level of cellular communication. This brief presents the state-of-the-art research on resource management for D2D communication underlaying cellular networks. Those who work with D2D communication will use this book’s information to help ensure their work is as efficient as possible. Along with the survey of existing work, this book also includes the fundamental theories, key techniques, and applications.
Author: Li Wang Publisher: Springer ISBN: 3319306812 Category : Computers Languages : en Pages : 103
Book Description
This SpringerBrief focuses on crucial issues for device-to-device (D2D) communications within the rapidly expanding 4G LTE toward 5G system. Several critical technical challenges in D2D communications are discussed, and D2D standardization activities in 3GPP are provided. Topics range from proximity discovery and mode selection, to resource management. The authors investigate proximity detection solutions for enabling direct user equipment communication by listening to uplink transmission. The problem of mixed mode selection is demonstrated to meet multiple quality of service (QoS) requirements in D2D enabled cellular networks. Finally, the brief explores the problem of designing interference-constrained resource allocation to pair cellular user resources with potential D2D links in cellular D2D underlay, with the goal of improving spectrum efficiency. Device-to-Device Communications in Cellular Networks targets researchers and professionals working in wireless communications and networks. Advanced-level students in electrical engineering and computer science studying wireless communications and networks can also use this material as a study guide.
Author: Xingqin Lin Publisher: ISBN: Category : Languages : en Pages : 428
Book Description
Device-to-device (D2D) networking enables direct discovery and communication between cellular subscribers that are in proximity, thus bypassing the base stations (BSs). In principle, exploiting direct communication between nearby mobile devices will improve spectrum utilization, overall throughput, and energy consumption, while enabling new peer-to-peer and location-based applications and services. D2D-enabled broadband communication technology is also required by public safety networks that must function when cellular networks are not available. Integrating D2D into cellular networks, however, poses many challenges and risks to the long-standing cellular architecture, which is centered around the BSs. This dissertation identifies outstanding technical challenges in D2D-enabled cellular networks and addresses them with novel models and fundamental analysis. First, this dissertation develops a baseline hybrid network model consisting of both ad hoc nodes and cellular infrastructure. This model uses Poisson point processes to model the random and unpredictable locations of mobile users. It also captures key features of multicast D2D including multicast receiver heterogeneity and retransmissions while being tractable for analytical purpose. Several important multicast D2D metrics including coverage probability, mean number of covered receivers per multicast session, and multicast throughput are analytically characterized under the proposed model. Second, D2D mode selection which means that a potential D2D pair can switch between direct and cellular modes is incorporated into the hybrid network model. The extended model is applied to study spectrum sharing between cellular and D2D communications. Two spectrum sharing models, overlay and underlay, are investigated under a unified analytical framework. Analytical rate expressions are derived and applied to optimize the design of spectrum sharing. It is found that, from an overall mean-rate perspective, both overlay and underlay bring performance improvements (vs. pure cellular). Third, the single-antenna hybrid network model is extended to multi-antenna transmission to study the interplay between massive MIMO (multi-input multiple-output) and underlaid D2D networking. The spectral efficiency of such multi-antenna hybrid networks is investigated under both perfect and imperfect channel state information (CSI) assumptions. Compared to the case without D2D, there is a loss in cellular spectral efficiency due to D2D underlay. With perfect CSI, the loss can be completely overcome if the number of canceled D2D interfering signals is scaled appropriately. With imperfect CSI, in addition to pilot contamination, a new asymptotic underlay contamination effect arises. Finally, motivated by the fact that transmissions in D2D discovery are usually not or imperfectly synchronized, this dissertation studies the effect of asynchronous multicarrier transmission and proposes a tractable signal-to-interference-plus-noise ratio (SINR) model. The proposed model is used to analytically characterize system-level performance of asynchronous wireless networks. The loss from lack of synchronization is quantified, and several solutions are proposed and compared to mitigate the loss.
Author: Lingyang Song Publisher: Cambridge University Press ISBN: 1316240495 Category : Technology & Engineering Languages : en Pages : 437
Book Description
Covering the fundamental theory together with the state of the art in research and development, this practical guide provides the techniques needed to design, analyze, and optimize device-to-device (D2D) communications in wireless networking. With an ever-increasing demand for higher data rate wireless access, D2D communication is set to become a key feature supported by next generation cellular networks. This book introduces D2D-based wireless communications from the physical, MAC, network, and application layer perspectives, providing all the key background information before moving on to discuss real-world applications as well as potential future developments. Key topics are discussed in detail, such as dynamic resource sharing (for example of spectrum and power) between cellular and ad hoc D2D communications to accommodate larger volumes of traffic and provide better service to users. Readers will understand the practical challenges of resource management, optimization, security, standardization, and network topology, and learn how the design principles are applied in practice.
Author: Peng Li Publisher: Springer ISBN: 3319125958 Category : Computers Languages : en Pages : 82
Book Description
This brief examines current research on cooperative device-to-device (D2D) communication as an enhanced offloading technology to improve the performance of cognitive radio cellular networks. By providing an extensive review of recent advances in D2D communication, the authors demonstrate that the quality of D2D links significantly affects offloading performance in cellular networks, which motivates the design of cooperative D2D communication. After presenting the architecture of cooperative D2D communication, the challenges of capacity maximization and energy efficiency are addressed by optimizing relay assignment, power control and resource allocation. Furthermore, cooperative D2D communication is enhanced by network coding technology, and then is extended for broadcast sessions. Along with detailed problem formulation and hardness analysis, fast algorithms are developed by exploiting problem-specific characteristics such that they can be applied in practice.
Author: Xue Chen Publisher: ISBN: Category : Languages : en Pages :
Book Description
Device-to-Device communications have the great potential to bring significant performance boost to the conventional heterogeneous network by reusing cellular resources. In cellular networks, Device-to-Device communication is defined as two user equipments in a close range communicating directly with each other without going through the base station, thus offloading cellular traffic from cellular networks. In addition to improve network spectral efficiency, D2D communication can also improve energy efficiency and user experience. However, the co-existence of D2D communication on the same spectrum with cellular users can cause severe interference to the primary cellular users. Thus the performance of cellular users must be assured when supporting underlay D2D users. In this work, we have investigated cross-layer optimization, resource allocation and interference management schemes to improve user experience, system spectral efficiency and energy efficiency for D2D communication underlaying heterogeneous networks. By exploiting frequency reuse and multi-user diversity, this research work aims to design wireless system level algorithms to utilize the spectrum and energy resources efficiently in the next generation wireless heterogeneous network.
Author: Masood Ur Rehman Publisher: John Wiley & Sons ISBN: 111978879X Category : Technology & Engineering Languages : en Pages : 244
Book Description
Explore this insightful foundational resource for academics and industry professionals dealing with the move toward intelligent devices and networks Interference Mitigation in Device-to-Device Communications delivers a thorough discussion of device-to-device (D2D) and machine-to-machine (M2M) communications as solutions to the proliferation of ever more data hungry devices being attached to wireless networks. The book explores the use of D2D and M2M technologies as a key enabling component of 5G networks. It brings together a multidisciplinary team of contributors in fields like wireless communications, signal processing, and antenna design. The distinguished editors have compiled a collection of resources that practically and accessibly address issues in the development, integration, and enhancement of D2D systems to create an interference-free network. This book explores the complications posed by the restriction of device form-factors and the co-location of several electronic components in a small space, as well as the proximity of legacy systems operating in similar frequency bands. Readers will also benefit from the inclusion of: A thorough introduction to device-to-device communication, including its history and development over the last decade, network architecture, standardization issues, and regulatory and licensing hurdles An exploration of interference mitigation in device-to-device communication underlaying LTE-A networks A rethinking of device-to-device interference mitigation, including discussions of the challenges posed by the proliferation of devices An analysis of user pairing for energy efficient device-to-device content dissemination Perfect for researchers, academics, and industry professionals working on 5G networks, Interference Mitigation in Device-to-Device Communications will also earn a place in the libraries of undergraduate, graduate, and PhD students conducting research into wireless communications and applications, as well as policy makers and communications industry regulators.
Author: Panagopoulos, Athanasios D. Publisher: IGI Global ISBN: 1466687339 Category : Technology & Engineering Languages : en Pages : 635
Book Description
Anyone who has ever shopped for a new smart phone, laptop, or other tech gadget knows that staying connected is crucial. There is a lot of discussion over which service provider offers the best coverage—enabling devices to work anywhere and at any time—with 4G and LTE becoming a pervasive part of our everyday language. The Handbook of Research on Next Generation Mobile Communication Systems offers solutions for optimal connection of mobile devices. From satellite signals to cloud technologies, this handbook focuses on the ways communication is being revolutionized, providing a crucial reference source for consumers, researchers, and business professionals who want to be on the frontline of the next big development in wireless technologies. This publication features a wide variety of research-based articles that discuss the future of topics such as bandwidth, energy-efficient power, device-to-device communication, network security and privacy, predictions for 5G communication systems, spectrum sharing and connectivity, and many other relevant issues that will influence our everyday use of technology.
Author: Jude Hemanth Publisher: Springer ISBN: 3030031462 Category : Technology & Engineering Languages : en Pages : 1590
Book Description
This book discusses data communication and computer networking, communication technologies and the applications of IoT (Internet of Things), big data, cloud computing and healthcare informatics. It explores, examines and critiques intelligent data communications and presents inventive methodologies in communication technologies and IoT. Aimed at researchers and academicians who need to understand the importance of data communication and advanced technologies in IoT, it offers different perspectives to help readers increase their knowledge and motivates them to conduct research in the area, highlighting various innovative ideas for future research.
Author: Huan Tang
Author: Huan Tang
Author: Lingyang Song
Author: Li Wang
Author: Xingqin Lin
Author: Lingyang Song
Author: Peng Li
Author: Xue Chen
Author: Masood Ur Rehman
Author: Panagopoulos, Athanasios D.
Author: Jude Hemanth