Download or read book Network Selection and Optimisation of 4G Heterogeneous Multi hop Broadband Wireless Networks written by Alvin Ting Kee Ngoh and published by . This book was released on 2014 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless Heterogeneous Networking (HetNet) offers the potential to be one of the most promising approaches to meeting escalating network capacity demands cost-effectively. The main challenge facing the deployment of HetNets is provisioning backhaul connectivity for small cells and the selection is governed by availability and cost, not solely by capacity requirements. In practical deployments, the adoption of mixture of backhaul technologies is likely, creating a non-uniform capacity distribution of small cells. The challenge becomes even more demanding if the backhaul is in the form of a multi-hop network. The research therefore proposes two algorithms which ensure that users enjoy the best possible quality of experience represented in terms of connection throughput and fairness considering the issues owing to small cells backhauling. The performance of types of HetNet, the Hotspot Wireless HetNet (HWH) and Multi-hop Wireless HetNet (MWH) corresponding to direct and multi-hop backhauling of small cells is evaluated. For HWH, an algorithm - the Dynamic Backhaul Capacity Sensitive Network Selection Scheme (DyBaCS) - is developed to manage the non-uniform backhaul capacity distribution ensuring a consistently fair network bandwidth distribution whilst maintaining throughput. The performance of DyBaCS and two other commonly used network selection schemes (NSSs) is evaluated and compared. Results show that DyBaCS provides superior fairness and a user throughput performance comparable to other reported schemes. For the more complex MWH architecture, a joint Multi-hop Bandwidth Allocation (MBA) and DyBaCS algorithm is developed to manage network performance. The performance of the algorithm is compared to results obtained using the Cuckoo Search optimisation algorithm and the Fair Share bandwidth allocation scheme. Results show that the algorithm is resilient in improving cell throughput whilst maintaining high levels of fairness.
Download or read book Broadband Wireless Access Networks for 4G Theory Application and Experimentation written by Santos, Raul Aquino and published by IGI Global. This book was released on 2013-12-31 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increased functionality demand for mobile speed and access in our everyday lives, broadband wireless networks have emerged as the solution in providing high data rate communications systems to meet these growing needs. Broadband Wireless Access Networks for 4G: Theory, Application, and Experimentation presents the latest trends and research on mobile ad hoc networks, vehicular ad hoc networks, and routing algorithms which occur within various mobile networks. This publication smartly combines knowledge and experience from enthusiastic scholars and expert researchers in the area of wideband and broadband wireless networks. Students, professors, researchers, and other professionals in the field will benefit from this books practical applications and relevant studies.
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 Efficient Resource Allocation and Network Design in Heterogeneous Wireless Networks written by Haiping Liu and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless networks provide flexible and ubiquitous access to the telephone networks or the Internet. Multiple technologies have been developed to provide wireless access including cellular/3G/LTE, WiFi, and WiMAX. The cellular network is the most popular network, which provides the stable and constant service under most types of mobility. Its future version, LTE Advanced, is the most advanced wireless access technology, and supports the current or future bandwidth-sensitive and/or delay-sensitive applications, such as Voice over IP and real-time video streaming. The WiFi network has been aggressively deployed in many areas and provide access to laptops, PDAs and smartphones. These are referred to as WiFi hotspots. The basic WiFi infrastructure usually offers flexible and easy to deploy wireless access inside a small area at a low cost. The WiMAX network has its own advantages to provide higher transmission speed for a point-to-point communication over longer transmission distances. In many areas, these wireless networks co-exist, overlap and interlace with one another to create a heterogeneous wireless network. Instead of functioning independently, significant benefits can be accrued through cooperation and coordination among these networks by leveraging their unique advantages. This is possible as user devices come with multiple network interfaces to connect to each of these networks. In order to exploit the advantages of these heterogeneous networks, it is important to implement an efficient resource allocation algorithm to coordinate the resources of multiple wireless networks and also have a good design of the heterogeneous network. The dissertation makes contributions in both the above areas. In current WiFi networks, the overall spectrum is divided among multiple overlapping channels. The adjacent access points need to operate on orthogonal channels to avoid the interference. In Chapter II, we give a precise analysis of the interference among different channels and discuss the potential possibility of utilizing partially overlapping channels in the multi-hop mesh networks. It is possible to optimize different network performance metric, such as throughput, by balancing parallel transmissions and partially received transmission power offers the best system performance, such as throughput. In the multi-hop mesh networks, some mesh nodes are highly congested either due to the interferences from multiple neighbors, or when they are located at the intersection of multiple routing paths. These highly congested mesh nodes significantly degrade the network performance, since the throughput of a path is limited by the node with minimum capacity. In Chapter III, we discuss the efficient cooperation between a WiFi-based mesh network and a WiMAX network to mitigate the impact of congested nodes. The WiMAX network, with its longer transmission range, can be leveraged to bypass the traffic from some highly congested mesh nodes. The load balancing makes the throughput of the heterogeneous network higher than the sum of the throughput from the WiFi and WiMAX networks if they operate independently. In the widely deployed wireless networks, the infrastructure mode is used, where customer devices only communicate with the base stations. This mode is suitable for normal Internet access. However, some emerging applications, such as P2P file sharing, teleconferencing, network games, require frequent communications among terminals that may be in the coverage of the same base station. The exiting infrastructure mode of the network architecture results in high resource waste due to the unnecessary transmissions via the base station even when both the user could directly communicate. In Chapter IV, we propose a novel network architecture, Local-Interest-Group (LIG), in which all nodes can communicate in any ways according to the application requirements. The real-time algorithm and protocol minimize the interferences among co-existing LIGs and maximize the bandwidth utilization, which greatly improves the overall system performance under multiple performance metrics. In network planning, it is difficult to efficiently locate base stations due to the inaccuracies in the prediction of the traffic density. The movement of traffic to different parts in the city during different times of a day makes fixed base stations either operate at very low load or become highly congested at different time periods. Fortunately, the detailed analysis based on network measurement shows that the movement of traffic density is predicable. In Chapter V, we propose a new network component, Traffic-Tracing Gateway (TTG), which works as the base station but traces the traffic movement taking the advantage of the heterogeneous wireless networks. By following the optimal trajectories, TTGs cover the maximum traffic and provide much better system performance in both single-hop or multi-hop networks. This dissertation proposes efficient resource allocation methods in heterogenous wireless access network with partially overlapping channels and the cooperation between WiFi and WiMAX networks. In the dissertation, we also propose the novel network designs based on local-interest-groups and traffic-tracing gateways, to augment existing wireless access networks and making them more resource efficient while providing higher end-to-end performance.
Download or read book Cooperative Networking in a Heterogeneous Wireless Medium written by Muhammad Ismail and published by Springer Science & Business Media. This book was released on 2013-03-28 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This brief focuses on radio resource allocation in a heterogeneous wireless medium. It presents radio resource allocation algorithms with decentralized implementation, which support both single-network and multi-homing services. The brief provides a set of cooperative networking algorithms, which rely on the concepts of short-term call traffic load prediction, network cooperation, convex optimization, and decomposition theory. In the proposed solutions, mobile terminals play an active role in the resource allocation operation, instead of their traditional role as passive service recipients in the networking environment.
Download or read book Advanced Wireless Networks written by Savo G. Glisic and published by John Wiley & Sons. This book was released on 2016-07-22 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third edition of this popular reference covers enabling technologies for building up 5G wireless networks. Due to extensive research and complexity of the incoming solutions for the next generation of wireless networks it is anticipated that the industry will select a subset of these results and leave some advanced technologies to be implemented later,. This new edition presents a carefully chosen combination of the candidate network architectures and the required tools for their analysis. Due to the complexity of the technology, the discussion on 5G will be extensive and it will be difficult to reach consensus on the new global standard. The discussion will have to include the vendors, operators, regulators as well as the research and academic community in the field. Having a comprehensive book will help many participants to join actively the discussion and make meaningful contribution to shaping the new standard.
Download or read book Heterogeneous Networks in LTE Advanced written by Joydeep Acharya and published by John Wiley & Sons. This book was released on 2014-02-18 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive summary of theoretical and practical developments in LTE Heterogeneous Networks The last decade has witnessed the proliferation of mobile broadband data and the trend is likely to increase in the coming years. Current cellular networks are ill equipped to deal with this surge in demand. To satisfy user demand and maximize profits, a new paradigm to operate networks is needed. Heterogeneous networks, that deploy an overlay of small cells with limited coverage and transmit power, over a macro coverage area is the solution by providing capacity and coverage where it is needed. This book presents a comprehensive overview of small cell based heterogeneous networks within the framework of 3GPP LTE-Advanced which is the major enabler of current and future heterogeneous networks. The book first establishes the basics of LTE standards 8 -10. Wherever relevant, the underlying theory of wireless communications is explained and the signaling and protocol aspects of LTE Releases 8-10 are presented. Next the book presents a systematic study of the inter cell interference (eICIC and FeICIC) mechanisms that have been standardized in LTE releases 10 and 11 to mitigate the interference arising in heterogeneous networks. From simple blank subframe design and implementation, the book discusses more advanced transceiver signal processing and carrier aggregation (CA) based mechanisms to improve performance. Besides data, control channel enhancements such as enhanced PDCCH (ePDCCH) are also discussed. Subsequently the book discusses the possibility of base stations being allowed to coordinate to manage interference. This technique, called CoMP, has the potential of vastly improving network performance. However several practical challenges first have to be overcome before this potential can be realized. The book presents the different CoMP categories introduced in LTE release 11, the required signal processing and the changes that were introduced in Release-11 for supporting CoMP. The book then presents the state of the art developments in heterogeneous networks that are currently taking place in 3GPP with the initiation of Release 12. A whole array of new technologies have been introduced such as dynamic switching of small cells, new carrier types with reduced control signaling, dynamic reconfiguration of TDD-LTE, joint configuration of TDD and FDD via carrier aggregation and lastly advanced MIMO signal processing with three dimensional beamforming. All these technologies will work in unison leading to efficient operations of small cells. The authors thus comprehensively summarize the advances in heterogeneous networks over the last couple of years as reflected in various LTE releases and then look ahead at what to expect in the future. Fully illustrated throughout and with an accompanying website including Matlab code for simulating heterogeneous networks, LTE channel models, and References to 3GPP specifications, contributions, and updates on recent standardization activities. The authors, being involved in LTE standardization, are well placed to give an excellent view on this topic, including valuable background and design rationale. A comprehensive summary of wireless communications theory and practical developments in LTE heterogeneous networks. Authors are experts in this field and are active members in standardization proceedings, enabling up-to-date coverage of current developments Multiple case studies explain network design optimization of various heterogeneous network deployments. Accompanying website includes Matlab code for simulating heterogeneous networks, LTE channel models, and References to 3GPP specifications, contributions, and updates on recent standardization activities Essential reading for Engineers and practitioners in wireless industry.
Download or read book Comprehensive Guide to Heterogeneous Networks written by Kiran Ahuja and published by Elsevier. This book was released on 2022-09-15 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Guide to Heterogeneous Networks discusses the fundamental motivations behind this cutting-edge development, followed by a brief discussion about the diverse definitions of HNs. The future of the heterogeneous wireless networks (HWNs) is covered which includes test cases, cost configuration, economic benefits and basic challenges. In the second section, an exploitation and topology management method are presented in context of heterogeneous sensor nodes with diverse communication and sensing range. Heterogeneous wireless sensor network (HWSN) consists of sensor nodes with different capabilities viz. dissimilar computing power and sensing range. As compared to homogeneous WSN, deployment and topology management are more complicated in HWSN. An outline of the pros and cons of the clustering criteria in HWSNs and taxonomy are summarized and conclude the section with some futuristic research directions. The final section discusses the future evolution of HNs along with their implementations in diverse applications in current era. Evolving 5G and beyond communication networks are envisioned as an application of HNs. It facilities real-time networks with substantial connectivity, excessive high data rate, ultralow latency, improvised security, very low energy consumption, and exceptional quality of experience (QoE). In order to attain full convergence of the HNs, many technical issues need to be resolved, which are deeply considered in this section. This is an essential reference book for advanced students on courses in wireless communications, clinical engineering and networking. It will also be of interest to researchers, network planners, technical mangers and other professionals in these fields.
Download or read book Performance Analysis of Integrated Multihop Heterogeneous Networks written by Hao Luan and published by . This book was released on 2009 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Next-generation network (NGN) will see an integration of various types of wireless networks, which provides mobile users with seamless and pervasive network connectivity. One of the major challenges of the integration is the network selection strategy. In this thesis, we will propose a network selection strategy that employs the concept of multihop ad hoc network (MANET) based on multiple traffic types. Furthermore, we add channel reservation method to the scheme in order to further reduce voice call blocking probability. We also try to reduce the traffic burden of wireless local area network (WLAN) by requesting services from the cellular network before retransmissions in WLAN when the number of packet retransmissions has exceeded the threshold. System performances are evaluated through extensive simulations and the results show that our schemes not only achieve lower new/handoff voice call blocking probability, but also lead to increased average WLAN throughput compared to the single-hop connection scheme.
Download or read book Dynamic Network Selection for Optimized Use of Mobile Internet written by Sven Lahde and published by . This book was released on 2011 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Internet gained a high importance in people's daily life during the past years. With the advent of powerful mobile devices as, for instance, notebooks, netbooks, or even smartphones, the mobile use of Internet services grew drastically. One key aspect that is expected to boost the success of mobile Internet even further is the provision of ubiquitous access to Internet services and, in particular, a seamless integration of heterogeneous networks, which provides a transparent selection of the best option for Internet access in any situation. This work proposes a user-centric framework for dynamic network selection to make efficient use of the available capabilities of heterogeneous communications ecosystems and to increase the overall service quality that is experienced by the user. The main focus is on the design of a novel strategy for selecting the most suitable network for each individual application on a mobile device. It allows for bundling different network paths to achieve a higher performance and for deferring application requests, for instance, to wait for access networks that are expected to appear in the future. In addition, a path management concept for seamless handovers between different networks and an approach for concurrent multipath transfer in scenarios with heterogeneous network characteristics are presented.
Download or read book Optimizing Network Access Selection in Wireless Heterogeneous Networks Using Velocity Location Policy and Qos Details written by Xavier Francis and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the interest in 4G communication systems continues to grow, both academia and industry agree that a symbiotic relationship between various wireless systems is required to provide continuous broadband coverage to mobile users. It is generally accepted that a single wireless access technology alone will be incapable of meeting the various requirements of mobility, data rate and coverage in the future. Future wireless systems are envisioned as being heterogeneous in that they will include a combination of various wireless access technologies such as 3G, WLAN, and WiMAX and will have a common IP core. To fully utilize the various resources and maintain seamless connectivity in the future heterogeneous wireless environment, intelligent handoff schemes that are flexible, scalable and proactive are essential. Therefore, a new handoff decision method, one that works in a novel business model--Heterogeneous Wireless Service Provider (HWSP)--was developed with an aim to improve the mobile user's user experience. More effort was spent to achieve a good level of user satisfaction, by making the entire selection process automatic, and the user oblivious of the underlying network selection intricacies. The algorithm is able to make the final network decision, based on any particular user's speed, location, QoS demands and preference policies. This allows the algorithm to prevent unwanted handoffs and reduce the cost associated with connecting to suboptimal networks.
Download or read book Game Theory in Wireless and Communication Networks written by Zhu Han and published by Cambridge University Press. This book was released on 2012 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unified 2001 treatment of game theory focuses on finding state-of-the-art solutions to issues surrounding the next generation of wireless and communications networks. The key results and tools of game theory are covered, as are various real-world technologies and a wide range of techniques for modeling, design and analysis.
Download or read book Broadband Multi hop Communication in Homogeneous and Heterogeneous Wireless LAN Networks written by Harianto Wijaya and published by . This book was released on 2005 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Network Selection with Load Management in Heterogeneous Wireless Networks written by Syed Qutubuddin Ahmed and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wireless Network Traffic and Quality of Service Support Trends and Standards written by Lagkas, Thomas D. and published by IGI Global. This book was released on 2010-03-31 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book offers cutting edge approaches for the provision of quality of service in wireless local area networks"--Provided by publisher.
Download or read book Dynamic Spectrum Access and Management in Cognitive Radio Networks written by Ekram Hossain and published by Cambridge University Press. This book was released on 2009-06-18 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: An all-inclusive introduction to this revolutionary technology, presenting the key research issues and state-of-the-art design, analysis, and optimization techniques.
Download or read book Autonomous Control for a Reliable Internet of Services written by Ivan Ganchev and published by Springer. This book was released on 2018-05-30 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book was prepared as a Final Publication of the COST Action IC1304 “Autonomous Control for a Reliable Internet of Services (ACROSS)”. The book contains 14 chapters and constitutes a show-case of the main outcome of the Action in line with its scientific goals. It will serve as a valuable reference for undergraduate and post-graduate students, educators, faculty members, researchers, engineers, and research strategists working in this field. The explosive growth of the Internet has fundamentally changed the global society. The emergence of concepts like SOA, SaaS, PaaS, IaaS, NaaS, and Cloud Computing in general has catalyzed the migration from the information-oriented Internet into an Internet of Services (IoS). This has opened up virtually unbounded possibilities for the creation of new and innovative services that facilitate business processes and improve the quality of life. However, this also calls for new approaches to ensuring the quality and reliability of these services. The objective of this book is, by applying a systematic approach, to assess the state-of-the-art and consolidate the main research results achieved in this area.
