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A self-contained guide to the state-of-the-art in cooperative communications and networking techniques for next generation cellular wireless systems, this comprehensive book provides a succinct understanding of the theory, fundamentals and techniques involved in achieving efficient cooperative wireless communications in cellular wireless networks. It consolidates the essential information, addressing both theoretical and practical aspects of cooperative communications and networking in the context of cellular design. This one-stop resource covers the basics of cooperative communications techniques for cellular systems, advanced transceiver design, relay-based cellular networks, and game-theoretic and micro-economic models for protocol design in cooperative cellular wireless networks. Details of ongoing standardization activities are also included. With contributions from experts in the field divided into five distinct sections, this easy-to-follow book delivers the background needed to develop and implement cooperative mechanisms for cellular wireless networks.
This book presents a unified framework for the tractable analysis of large-scale, multi-antenna wireless networks using stochastic geometry. This mathematical analysis is essential for assessing and understanding the performance of complicated multi-antenna networks, which are one of the foundations of 5G and beyond networks to meet the ever-increasing demands for network capacity. Describing the salient properties of the framework, which makes the analysis of multi-antenna networks comparable to that of their single-antenna counterparts, the book discusses effective design approaches that do not require complex system-level simulations. It also includes various application examples with different multi-antenna network models to illustrate the framework’s effectiveness.
[ANGLÈS] The increasing popularity of connected devices and the augmentation of users' number are boosting the mobile broadband traffic, which has grown exponentially during the last years. Also costumers' expectations are on the rise, users have come to expect a consistent, high-quality and seamless mobile broadband experience everywhere. To meet these expectations, the capacity and the coverage of the current networks need to be improved to deliver high data throughput with very low latency. Since spectrum has become a scarce resource nowadays, new ways have to be found to improve the network performance. The key options to achieve this target include improving and densifying the existing macro layer and complementing the macro layer with low power nodes; that is to say, deploying heterogeneous networks. The concept of heterogeneous networks has recently attracted considerable interest as a way to optimize the performance of the network, particularly for unequal user or traffic distribution situations. A heterogeneous network is composed of multiple radio access technologies, architectures, transmission solutions, and base stations of varying transmission power that can interoperate, thus creating a multilayer structure. Due to the different operating modes of the nodes, some of them work in open access mode but others work in closed access mode, and the unbalanced transmission power of the different base stations of the network, select the appropriate server station can be challenging for the users' equipments. A wrong cell selection process can lead to the under-utilization of low power nodes; so that, range extension technique is proposed to allow more users to be attached to low power nodes. Manage the interferences caused by the macro station to the low power nodes and vice versa is one of the biggest challenges in the deployment of heterogeneous networks. Enhanced Inter Cell Interference Coordination (eICIC) schemes have been proposed to deal with this problem. These approaches can be divided into time domain techniques, such as Almost Blank Sub-frames (ABS), and frequency domain techniques. Their implementation relays in the use of some basic characteristics of the radio access technology used in the network. This project is structured as follows: in Section 1 the concept of heterogeneous networks is defined, deepening in to the factors that have led to their apparition. Different techniques to address the major technical challenges of heterogeneous deployments are described in Section 2. In Section 3, the main techniques to deal with intra-frequency interference are introduced. Finally, one of the methods described in the previous section, the time domain technique, is explained in detail in Section 4.
Diploma Thesis from the year 2012 in the subject Engineering - Communication Technology, grade: excellent, Technical University of Berlin (Intelligent Networks), language: English, abstract: With the increasing data throughput requirements, the cellular network needs to move from homogeneous to heterogeneous system. In fact, the coexistence of different types of base stations with different capabilities such as femto/pico base stations as well as relays and macro base stations in random placements should improve the coverage and the spectral efficiency of the cellular networks. However, the complexity of inter-cell interference management will grow drastically and traditional interference avoidance/mitigation approaches need to be revised. Approaching this problem at the user equipment (UE), is of great interest since it can rely on little coordination among base stations. The work presented in this thesis focuses on a downlink interference cancellation at the UE and shows that such an intelligent receiver can bring its promised benefit only if the base stations get involved in the interference cancellation, specifically in the channel estimation process. The limitations of this approach are evaluated and depending on the surrounding base stations two solutions are proposed and discussed.
This comprehensive resource explores state-of-the-art advances in the successful deployment and operation of small cell networks. A broad range of technical challenges, and possible solutions, are addressed, including practical deployment considerations and interference management techniques, all set within the context of the most recent cutting-edge advances. Key aspects covered include 3GPP standardisation, applications of stochastic geometry, PHY techniques, MIMO techniques, handover and radio resource management, including techniques designed to make the best possible use of the available spectrum. Detailed technical information is provided throughout, with a consistent emphasis on real-world applications. Bringing together world-renowned experts from industry and academia, this is an indispensable volume for researchers, engineers and systems designers in the wireless communication industry.
This SpringerBrief discusses the current research on coordinated multipoint transmission/reception (CoMP) in wireless multi-cell systems. This book analyzes the structure of the CoMP precoders and the message exchange mechanism in the CoMP system in order to reveal the advantage of CoMP. Topics include interference management in wireless cellular networks, joint signal processing, interference coordination, uplink and downlink precoding and system models. After an exploration of the motivations and concepts of CoMP, the authors present the architectures of a CoMP system. Practical implementation and operational challenges of CoMP are discussed in detail. Also included is a review of CoMP architectures and deployment scenarios in the LTE-Advanced standard. Readers are exposed to the latest multiuser precoding designs for the CoMP system under two operating modes, interference aware and interference coordination. Wireless Coordinated Multi cell Systems: Architectures and Precoding Designs is a concise and approachable tool for researchers, professionals and advanced-level students interested in wireless communications and networks.