Download or read book Interference and Resource Management in Heterogeneous Wireless Networks written by Jiandong Li and published by Artech House. This book was released on 2017-11-30 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative resource offers a comprehensive overview of heterogeneous wireless networks, small cells, and device-to-device (D2D) communications. The book provides insight into network modeling and performance analysis of heterogeneous wireless networks. Interference management framework and design issues are covered as well as details about resource mobility, channel models, and typical and statistical interference modeling. This resource explains leveraging resource heterogeneity in interference mitigation and presents the challenges and feasible solutions for concurrent transmission. Moreover, complete coverage of interference alignment in MIMO heterogeneous networks for both downlink and uplink is presented. This book provides performance results for an ideal partially connected interference network as well as a practical heterogeneous network. Readers find practical guidance for LTE and LTE-Advanced as well as 5G in this resource. New techniques and designs for heterogeneous wireless networks are included.

Download or read book Cognitive Interference Management in Heterogeneous Networks written by Dania Marabissi and published by Springer. This book was released on 2015-06-24 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This brief investigates the role of interference management in Heterogeneous Networks (Het Nets), focusing on cognitive approaches and the use of beamforming. Key concepts of Het Nets are introduced and different deployment strategies are examined, such as sharing the same frequency band of the macro cells or using new high frequency bands. Particular attention is devoted to co-channel deployment and to the problem of interference management, addressing various strategies that can be adopted to handle the interference between the cells. In addition, the brief explores cognitive small cells which are able to avoid or limit interference by using suitable beamforming and resource allocation schemes. The suggested solutions are supported by numerical results in terms of performance evaluations and comparisons.

Download or read book Interference Management in Heterogeneous Networks written by Min Sung Kim and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cellular wireless data traffic is now growing at about 80% compound annual growth rate (CAGR), and hence creating a corresponding demand for additional capacity. This traffic growth in the developed world comes mainly from the increasing use of video file transfers or viewings. In the emerging countries, the increasing smart-phone penetration is an additional factor. The demand for capacity can be met by more spectrum, higher spectrum efficiency, and a greater number of cells. However, increasing spectrum and spectrum efficiency has proved to be slow because of both regulatory and technological barriers. Therefore, increasing the number of cells is an effective way to add capacity. Because of the diverse types of mobile data, the use of different tiers of cells has become necessary: high-power and high-capacity large macro cells to serve vehicle based users, medium-power and medium-capacity small pico cells for outdoor pedestrian users, and very low-power and low-capacity femto cells for indoor users. These cells often work together and are known as a heterogeneous network. The cells in a heterogeneous network often share the limited spectrum available to the operator. They reuse the spectrum across tiers as well as within the same tier. This inter-tier reuse creates interference, e.g., femto to macro interference. In addition, intra-tier interference arises from frequency reuse within a tier, e.g., femto to femto interference. Managing interference in heterogeneous networks is hence complex compared to the interference management of earlier single-tier macro cell networks, which is well understood. The research presented in this dissertation studied two interference management problems: inter-tier interference management between a macro cell and a femto cell, and intra-tier interference among femto cells. Chapter 2 presents the downlink femto-macro inter-tier interference management problem. This chapter proposes a cost criteria of maximizing the minimum (worst-case) rate of femto users while constraining the worst-case performance degradation of macro cell users caused by interference from the femto base station. Analysis shows that a combination of frequency (resource-block) allocation for femto users and power control of each resource block can lead to good results. Because the general joint resource block-allocation and power-control problem is very complex (NP-hard), a suboptimal method is developed using a decoupled resource allocation and power control. All these solutions were also verified by simulations. An analytical solution for the single femto user case also appears. Chapter 3 presents the management of downlink intra-tier interference in an enterprise femto network with multiple femto base stations. This chapter discusses admission of users to receive service, allocation of users to femto base stations, and the downlink power control to maximize the service rate while maintaining the QoS criteria, which specifies the worst-case 95th percentile download time of a file. The analysis demonstrates the effectiveness of the proposed algorithm by simulation and also discusses naive (baseline) scheduling, which does not manage intra-tier interference, that leads to poor throughput as the density of femto cells increase. Last, this chapter explores a flexible user-base station association approach wherein the base station associated with a given user can be dynamically changed during a download period at network events. Such flexibility adds a significant performance improvement. Chapter 4 concludes the thesis by summarizing the results, discussing the limitations of the work presented, and making suggestions for future research.

Download or read book Architectures of Small Cell Networks and Interference Management written by Duy Trong Ngo and published by Springer. This book was released on 2014-07-08 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Springer Brief presents the architectures of small-cell networks and recent advances in interference management. The key challenges and values of small cells are first introduced, followed by the reviews of various small-cell architectures and interference management techniques in both heterogeneous CDMA and heterogeneous OFDMA small-cell networks. New adaptive power control and dynamic spectrum access techniques are discussed to promote a harmonized coexistence of diverse network entities in both 3G and 4G small-cell networks. Analytically devised from optimization and game theories, autonomous solutions are shown to effectively manage the intra-tier and cross-tier interferences in small cells. Informative and practical, this Springer Brief is designed for researchers and professionals working in networking and resource management. The content is also valuable for advanced-level students interested in network communications and power allocation.

Download or read book Heterogeneous Cellular Networks written by Rose Qingyang Hu and published by John Wiley & Sons. This book was released on 2013-04-03 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely publication providing coverage of radio resourcemanagement, mobility management and standardization inheterogeneous cellular networks The topic of heterogeneous cellular networks has gained momentumin industry and the research community, attracting the attention ofstandardization bodies such as 3GPP LTE and IEEE 802.16j, whoseobjectives are looking into increasing the capacity and coverage ofthe cellular networks. This book focuses on recentprogresses, covering the related topics including scenariosof heterogeneous network deployment, interference management in theheterogeneous network deployment, carrier aggregation in aheterogeneous network, cognitive radio, cell selection/reselectionand load balancing, mobility and handover management, capacity andcoverage optimization for heterogeneous networks, trafficmanagement and congestion control. This book enables readers to better understand the technicaldetails and performance gains that are madepossible by this state-of-the-art technology. It contains theinformation necessary for researchers and engineers wishing tobuild and deploy highly efficient wireless networks themselves. Toenhance this practical understanding, the book is structured tosystematically lead the reader through a series of case-studies ofreal world scenarios. Key features: Presents this new paradigm in cellular network domain: aheterogeneous network containing network nodes with differentcharacteristics such as transmission power and RF coveragearea Provides a clear approach by containing tables, illustrations,industry case studies, tutorials and examples to cover the relatedtopics Includes new research results and state-of-the-arttechnological developments and implementation issues

Download or read book Interference Management in Heterogeneous Cellular Networks written by Ping Xia and published by . This book was released on 2012 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultra Dense Heterogeneous Networks written by Wen Sun and published by CRC Press. This book was released on 2022-09-14 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Driven by the ever-increasing amount of mobile data, cellular networks evolve from small cell network to ultra-dense heterogeneous networks, to provide high system capacity and spectrum efficiency. By bringing base stations (BSs) to the approximate spatial scale and number magnitude, ultra-dense heterogeneous networks would definitely bring unprecedented paradigm changes to the network design. Firstly, along with densification of small cells, inter-cell interference becomes severe and may deteriorate performance of mobile users. Assigning network resources including bandwidth and time slots, while avoiding interference, desires serious consideration. Secondly, the coverage area of BSs becomes small and irregular, resulting in much frequent and complicated handovers when mobile users move around. How to ensure continuous communication and implement effective mobility management, and inter-cell resource allocation and cooperation, remains a challenging issue. Thirdly, such dynamic change in spatial dimension enables us to re-investigate available and ongoing communications and networking techniques, such as massive MIMO, CoMP, millimeter waves (mmWaves), carrier aggregation, full duplex radio, and D2D communications. To address the aforementioned challenging research issues, this book will investigate the service and QoE provisioning in ultra-dense heterogeneous networks. In particular, firstly we introduce ultra-dense heterogeneous networks by careful definition regarding spatial deployment, generic characteristics, and requirements of ultra-dense heterogeneous networks in order to ensure QoE of mobile users. Secondly, we depict the resource management among small cells in close proximity, mobility management for mobile users (address the super-frequent handovers), and interference management (dealing with the interference due to frequency-reuse in the vicinity). Thirdly, we study the enabling factors, and the integration of ultra-dense heterogeneous networks with enabling technologies, such as massive-MIMO, cloud-RAN, mmWaves, D2D, IoT. Finally, we conclude the book and indicate future directions and challenges.

Download or read book Downlink Interference Management and Resource Sharing in Heterogeneous Networks written by Haining Wang and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To cope with the ever-increasing cellular traffic demand, the heterogeneous network is introduced to densify the cells for places where that is most needed. However, heterogeneous deployment with a mixture of base-stations of different capabilities also imposes great challenges for inter-cell interference management. In Long-Term Evolution (LTE) systems, for example, radio resources can be shared in time, frequency and spatial domain, providing us with the flexibility for interference avoidance or suppression. But finding a near-optimal solution in such a complex system can be extremely difficult, if not impossible, with reasonable computational complexity. In this dissertation, we tackle the interference management in heterogeneous cellular networks under different system constraints, application scenarios and/or with different kinds of quality-of-service (QoS) metrics. In this context, we investigate four major problems. In the first problem, we address the throughput optimization with shared resources of macro and femto cells. Since the femto base-stations can be operated in closed mode implying that only a specific group of users have access to its service, significant downlink interference can be incurred to a nearby macro user equipment (MUE) with poor resource management. We proposed a stochastic approximation based scheme by allowing feedback in the macro-tier to be overheard by the femto tier without explicitly estimating the cross-tier channel gains. In the second problem, we model the network as a queueing system with dynamically generated traffic. For less delay-sensitive traffic, we can control the power for each resource element to maximize the average throughput given the constraint that the backlog for the macro-cell queue is not unbounded. Using Lyapunov drift analysis, we provide both a centralized and a distributed solution for femtocell power control utilizing macrocell queue length information. In the third problem, we further incorporate fairness into our consideration. To achieve better fairness than that obtained by purely optimizing total throughput, we provide a joint power control and resource allocation scheme to minimize the maximal outage probability constrained on macrocell user equipments' outage requirements. This ensures better interference management by providing uniform user experience for all femtocell users. In the last topic, we treat different nodes as agents participating in a game either independently or in a coordinated way. In a pure non-cooperative game, each base station maximizes its own profit in the form of sum throughput towards all users associated with it. The spectrum efficiency can be much improved with careful design and signal passing across nodes. When each base station has private information, the optimization problem is essentially an auction game. When a centralized powerful entity exists as for the case of a cloud-based radio access network (C-RAN), radio resources can be managed in a semi-centralized way with each node bidding for the services. Using this model, we provide different schemes to achieve joint user association and resource management considering the trade-off between complexity and performance.

Download or read book Interference Mitigation and Energy Management in 5G Heterogeneous Cellular Networks written by Yang, Chungang and published by IGI Global. This book was released on 2016-11-22 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, wireless networks have become more ubiquitous and integrated into everyday life. As such, it is increasingly imperative to research new methods to boost cost-effectiveness for spectrum and energy efficiency. Interference Mitigation and Energy Management in 5G Heterogeneous Cellular Networks is a pivotal reference source for the latest research on emerging network architectures and mitigation technology to enhance cellular network performance and dependency. Featuring extensive coverage across a range of relevant perspectives and topics, such as interference alignment, resource allocation, and high-speed mobile environments, this book is ideally designed for engineers, professionals, practitioners, upper-level students, and academics seeking current research on interference and energy management for 5G heterogeneous cellular networks.

Download or read book Interference Management and Resource Allocation in Heterogeneous Wireless Networks written by Ahmed Ragab Elsherif and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies have shown that a large percentage of cellular voice and data traffic originate from indoor usage. The concept of heterogeneous networks (HetNets) consisting of traditional macrocells and newly envisioned small cells has been proposed to solve the indoor coverage problem and to offload some traffic from traditional macrocells. The heterogeneity in HetNets refers mainly tocoverage where, unlike macrocells, small cells are low power short range base stations that can be deployed by network operators or end users. The main challenge of the deployment of HetNets is theinter- and intra-tier interference when sharing the same spectrum. In this work, we study HetNet deployments in various scenarios and propose several algorithms for interference management and resource allocation in those scenarios. In the first part of the dissertation, we study HetNets operating in licensed cellular band. We study the two popular deployment scenarios of public/home femtocells and enterprise femtocells. For public/home femtocells, the main challenge we study is the inter-tier interference between femtocell base station (FBS) and macrocell user equipment (MUE) in downlink. We propose a spatial domain approach for interference management through MIMO precoding and develop three time-frequency domain approaches for interference management through resource allocation. The main theme of our work is to exploit the already-available feedback information in existing cellular systems for interference management and resource allocation in HetNets. On the other hand, in enterprise femtocell deployments such as shopping malls, stadiums, or corporate premises, the major challenge is intra-tier interference among femtocells. For enterprise environments, we present a partially centralized architecture for interference management among femtocells through graph coloring followed by local resource allocation for HUEs associated with each femtocell with consideration of fairness. Next, we present the concept of dual-access-technology small cells with both licensed and unlicensed band interfaces which represents another dimension of heterogeneity that can be thought of as vertical heterogeneity. The use of dual-access-technology small cells is motivated by the widespread WiFi hotspots and the common inclusion of WiFi interface in most cellular user terminals. For dual-access-technology small cells, we study public/home small cells as well as enterprise femtocells. We formulate an optimization problem that jointly allocates resources over both licensed and unlicensed bands with the goal of maximizing sum rate of small cell user equipments with fairness constraints together with controlling inter- or intra-tier interference to neighboring macrocell or femtocell users, respectively. An important feature that our proposed solution furtherconsiders is the Quality of Service (QoS) requirements of different users traffic types to be distributed over licensed and/or unlicensed bands.

Download or read book Robust Interference Management for Ultra Dense Heterogeneous Networks written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interference Management for Heterogeneous Wireless Networks written by 蔡昂勳 and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Signal and Information Processing Networking and Computers written by Songlin Sun and published by Springer. This book was released on 2017-12-16 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings book presents the latest research in the fields of information theory, communication system, computer science and signal processing, as well as other related technologies. Collecting selected papers from the 3rd Conference on Signal and Information Processing, Networking and Computers (ICSINC), held in Chongqing, China on September 13-15, 2017, it is of interest to professionals from academia and industry alike.

Download or read book Cognitive Radio and Interference Management Technology and Strategy written by Ku, Meng-Lin and published by IGI Global. This book was released on 2012-08-31 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadcast spectrum is scarce, both in terms of our ability to access existing spectrum and as a result of access rules created by governments. An emerging paradigm called cognitive radio, however, has the potential to allow different systems to dynamically access and opportunistically exploit the same frequency band in an efficient way, thereby allowing broadcasters to use spectrum more efficiently. Cognitive Radio and Interference Management: Technology and Strategy brings together state-of-the-art research results on cognitive radio and interference management from both theoretical and practical perspectives. It serves as a bridge between people who are working to develop theoretical and practical research in cognitive radio and interference management, and therefore facilitate the future development of cognitive radio and its applications.

Download or read book Interference Management in Wireless Networks written by Venugopal V. Veeravalli and published by Cambridge University Press. This book was released on 2018-02-22 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn about a new, information-theoretic approach to minimizing interference in 5G wireless networks.

Download or read book Enhanced Interference Management Techniques for Heterogeneous Cellular Networks written by Obinna Samuel Oguejiofor and published by . This book was released on 2017 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resource Management for Heterogeneous Networks in LTE Systems written by Rose Qingyang Hu and published by Springer Science & Business Media. This book was released on 2014-03-21 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SpringerBrief provides an in-depth look at the key issues that affect the performance of heterogeneous networks and presents schemes that can effectively tackle these issues. In particular, this book discusses unbalanced traffic load among the macro and micro Base Stations (BSs) caused by the transmit power disparity, and a load-balancing based mobile association scheme to balance the traffic load among the macro and micro BSs. This book also introduces a fractional frequency reuse (FFR) scheme with proper power control to help reduce interference at the UEs which are most vulnerable to such intra-cell interference. The last section investigates radio resource allocation issues for heterogeneous networks with cooperative relays, and proposes a resource allocation framework that could achieve proportional fairness among the UEs. Numerical results are provided to demonstrate the effectiveness of the proposed solutions in tackling the problem and improving network performance. Resource Management for Heterogeneous Networks in LTE-A Systems is designed for researchers and professionals working in networking and resource management. The content is also valuable for advanced-level students in computer science and electrical engineering.