Download or read book Power Scheduling for Multi hop Wireless Networks written by Yuan Yu and published by . This book was released on 2009 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-hop wireless networks remain an important research frontier of wireless communications. Multi-hop wireless networks are rapidly deployable to extend the coverage of the Internet, which can be an economical alternative to building new base stations. Multi-hop wireless networks are particularly useful for first responders for disaster relief, and military operations in battlefields. In this thesis, we study power scheduling issues for multi-hop wireless networks. Power scheduling, also known as medium access control consisting of link scheduling, power control and source beamforming, fundamentally governs the capacity of multi-hop wireless networks. In the first part of this thesis, the achievable network throughput of large-scale multi-hop wireless networks is evaluated under a power scheduling scheme called opportunistic synchronous array method (O-SAM). Under O-SAM, a large network is partitioned into many small subnets, and within each subnet, the link with best channel gain is scheduled for transmission. We examine the impact of traffic load, network topology and multiple antennas on the achievable network throughput. Compared with slotted ALOHA, the throughput of O-SAM is significantly higher. In addition to O-SAM, a distributed synchronous array method (D-SAM) is proposed, and its performance is also evaluated. In the second part of this thesis, we focus on the power scheduling problem for multi-input multi-output (MIMO) relay networks. A generalized water filling (GWF) theorem is established for link rate maximization with multiple power constraints. The corresponding GWF algorithm is a fast solution to an important class of convex optimization problems. The GWF algorithm is a useful building block for joint source and relay optimization for a multiuser MIMO relay network. We study the power scheduling problems for both uplink and downlink cases of the multiuser MIMO relay network. A number of computational strategies are proposed to maximize the sum rate subject to power constraints or to minimize the sum power subject to rate constraints.
Download or read book Scheduling for Energy Conservation and Quality Enhancement in Multi hop Wireless Networks written by Ashima Gupta and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless networks and devices are ubiquitous today. This is primarily due to the increased mobility, flexibility and connectivity as well as high speed and low cost deployment that they provide. However quality of service, capacity, spectral efficiency and battery lifetime are some major concerns of wireless devices and networks. The broadcast nature of wireless media makes them prone to losses and high bit error rates. These variabilities make it challenging to guarantee quality of service parameters like rate, latency and jitter. Wireless devices consume more power than corresponding wired devices. These devices function on limited battery capacity to facilitate portability and mobility. Hence, their operational lifecycle is governed by the efficiency of their battery usage. The objective of this thesis is to analyze and apply novel application aware cross-layer scheduling techniques for energy conservation and quality enhancement in multi-hop wireless networks. We focus on scheduling techniques as many of these can integrated with existing systems and incorporated in new designs. Application awareness helps to identify the constraints and requirements at lower network layers (network and MAC layer). This facilitates the lower layers to perform prioritized scheduling to optimize bandwidth utilization for class differentiated flows and devise adaptive sleep-awake scheduling while minimizing the impact on quality of service. Specifically, we identify three applications: OFDMA based multi-hop networks, Sensor networks and Voice over Internet Protocol (VoIP). We model QoS aware centralized slot allocation scheme for prioritized flows in OFDMA based networks as an ILP that maximizes the described Flow Admittance metric. Several computationally tractable heuristics are compared for efficiency using different topologies and workloads. We enhance this solution for IEEE 802.16j networks making it scalable and adaptive to rate changes and link demands. We illustrate how a multi-channel sensor network scheduling scheme results in considerable energy savings when used to model a moving phenomenon or to deploy a heterogeneous sensor network. This is achieved without significant degradation in data gathering: quality or latency. Finally, we show how an adaptive scanning technique utilizing the sleep-awake scheduling in Wi-Fi networks is used to conserve energy and increase battery lifetime in VoIP Wi-Fi devices.
Download or read book Radio Resource Allocation for Multi hop Wireless Networks Using Cross layer Optimization written by Jennifer Catherine Fang and published by . This book was released on 2005 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scheduling and Fairness in Multi hop Wireless Networks written by Ananthapadmanabha Rajagopala-Rao and published by . This book was released on 2007 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Packet Scheduling in Multihop Wireless Networks written by Haiyun Luo and published by . This book was released on 2000 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multihop Wireless Networks written by Kai Zeng and published by John Wiley & Sons. This book was released on 2011-07-13 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an introduction to opportunistic routing an emerging technology designed to improve the packet forwarding reliability, network capacity and energy efficiency of multihop wireless networks This book presents a comprehensive background to the technological challenges lying behind opportunistic routing. The authors cover many fundamental research issues for this new concept, including the basic principles, performance limit and performance improvement of opportunistic routing compared to traditional routing, energy efficiency and distributed opportunistic routing protocol design, geographic opportunistic routing, opportunistic broadcasting, and security issues associated with opportunistic routing, etc. Furthermore, the authors discuss technologies such as multi-rate, multi-channel, multi-radio wireless communications, energy detection, channel measurement, etc. The book brings together all the new results on this topic in a systematic, coherent and unified presentation and provides a much needed comprehensive introduction to this topic. Key Features: Addresses opportunistic routing, an emerging technology designed to improve the packet forwarding reliability, network capacity and energy efficiency of multihop wireless networks Discusses the technological challenges lying behind this new technology, and covers a wide range of practical implementation issues Explores many fundamental research issues for this new concept, including the basic principles of opportunistic routing, performance limits and performance improvement, and compares them to traditional routing (e.g. energy efficiency and distributed opportunistic routing protocol design, broadcasting, and security issues) Covers technologies such as multi-rate, multi-channel, multi-radio wireless communications, energy detection, channel measurement, etc. This book provides an invaluable reference for researchers working in the field of wireless networks and wireless communications, and Wireless professionals. Graduate students will also find this book of interest.
Download or read book Wireless Scheduling in Multi channel Multi radio Multihop Wireless Networks written by Zhu Wang and published by . This book was released on 2014 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Joint Routing Scheduling and Power Allocation in Generic Multihop Wireless Networks written by Rozita Rashtchi and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scheduling and Error Control in Cellular and Multi hop Wireless Networks written by Teerawat Issariyakul and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design and Evaluation of Network Power Scheduling for Sensor Networks written by Barbara Ann Hohlt and published by . This book was released on 2005 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transmission Scheduling in Single hop and Multi hop Wireless Networks written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Designing for Network and Service Continuity in Wireless Mesh Networks written by Parth H. Pathak and published by Springer Science & Business Media. This book was released on 2012-11-02 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Designing for Network and Service Continuity in Wireless Mesh Networks” describes performance predictability of the new wireless mesh network paradigm, and describes considerations in designing networks from the perspective of survivability and service continuity metrics. The work provides design insights for network design researchers and industry professionals. It includes designs for new mesh networks and extensions of existing networks with predictable performance.
Download or read book Distributed Scheduling in Multihop Ad Hoc Networks written by Yijiang Sun and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Distributed Scheduling in Multihop Ad Hoc Networks" by Yijiang, Sun, 孫一江, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled "Distributed Scheduling in Multihop Ad Hoc Networks" Submitted by Sun Yijiang for the degree of Master of Philosophy at The University of Hong Kong in February 2008 A multihop ad hoc network is a network formed by multiple nodes with- out the aid of any centralized administration, and data traffic is typically forwarded by multiple intermediate nodes before reaching its destination. In this thesis, we focus on improving QoS of end-to-end traffic flows in multihop ad hoc networks through packet transmission scheduling. Our approach was to design a framework in which existing schedul- ingalgorithmsoriginallydesigned forinfrastructure-basedwirelessnetworks could be adapted to multihop ad hoc networks. While infrastructure-based wireless scheduling has been studied extensively and most of the proposed algorithms handle the characteristics of wireless medium in an effective and fairway, ourapproach aimstogeneralizetheadaptationofthese algorithms to ad hoc networks and thus to make maximum use of the existing resource of wireless scheduling. iThe framework consists of two sets of mechanisms. The first one is an end-to-end service compensation mechanism. Each multihop flow is asso- ciated with some QoS requirement, which is requested and granted in the form of the desired service rate. The achieved rate is estimated at the des- tination and fed back to the source periodically. Both the desired rate and achieved rate of a multihop flow are propagated from the source node to all its downstream relaying nodes. With this information, a compensation- capable scheduling algorithm originally designed for infrastructure-based wireless networks can be adapted to each ad hoc node for error compensa- tion. The second part of the framework is a set of mechanisms for distributed opportunistic scheduling in multihop wireless ad hoc networks. The frame- work includes a wireless link state estimation mechanism, a requirement on medium access control protocol and two mechanisms to limit the access of the wireless medium. The link state estimation mechanism provides the necessary status of each wireless link and thus enables the adaptation of various opportunistic scheduling algorithms. The performance ofthe proposed framework was evaluated by computer simulations. Theresultsshowed thattheframeworkcaneffectivelycompen- sate flows that suffer sporadic burst channel errors in an end-to-end fashion and provides robust outcome fairness in the presence of channel errors. (Total number of words: 357) Signed Sun Yijiang ii DOI: 10.5353/th_b3955828 Subjects: Ad hoc networks (Computer networks) Computer algorithms
Download or read book Wireless Algorithms Systems and Applications written by Yingshu Li and published by Springer Science & Business Media. This book was released on 2008-10-07 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Third Annual International Conference on Wireless Algorithms, Systems, and Applications, WASA 2008, held in Dallas, TX, USA, in October 2008. The 35 revised full papers presented together with 3 keynote talks and 15 invited lectures were carefully reviewed and selected from numerous submissions. Providing a forum for researchers and practitioners, from the academic, industrial and governmental sectors, the papers address current research and development efforts of various issues in the area of algorithms, systems and applications for current and next generation infrastructure and infrastructureless wireless networks.
Download or read book Algorithms and Protocols for Wireless and Mobile Ad Hoc Networks written by Azzedine Boukerche and published by John Wiley & Sons. This book was released on 2008-11-03 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn the fundamental algorithms and protocols for wireless and mobile ad hoc networks Advances in wireless networking and mobile communication technologies, coupled with the proliferation of portable computers, have led to development efforts for wireless and mobile ad hoc networks. This book focuses on several aspects of wireless ad hoc networks, particularly algorithmic methods and distributed computing with mobility and computation capabilities. It covers everything readers need to build a foundation for the design of future mobile ad hoc networks: Establishing an efficient communication infrastructure Robustness control for network-wide broadcast The taxonomy of routing algorithms Adaptive backbone multicast routing The effect of inference on routing Routing protocols in intermittently connected mobile ad hoc networks and delay tolerant networks Transport layer protocols ACK-thinning techniques for TCP in MANETs Power control protocols Power saving in solar powered WLAN mesh networks Reputation and trust-based systems Vehicular ad hoc networks Cluster interconnection in 802.15.4 beacon enabled networks The book is complemented with a set of exercises that challenge readers to test their understanding of the material. Algorithms and Protocols for Wireless and Mobile Ad Hoc Networks is appropriate as a self-study guide for electrical engineers, computer engineers, network engineers, and computer science specialists. It also serves as a valuable supplemental textbook in computer science, electrical engineering, and network engineering courses at the advanced undergraduate and graduate levels.
Download or read book Energy Efficient Scheduling under Delay Constraints for Wireless Networks written by Randal Berry and published by Springer Nature. This book was released on 2022-05-31 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Packet delay and energy consumption are important considerations in wireless and sensor networks as these metrics directly affect the quality of service of the application and the resource consumption of the network; especially, for a rapidly growing class of real-time applications that impose strict restrictions on packet delays. Dynamic rate control is a novel technique for adapting the transmission rate of wireless devices, almost in real-time, to opportunistically exploit time-varying channel conditions as well as changing traffic patterns. Since power consumption is not a linear function of the rate and varies significantly with the channel conditions, adapting the rate has significant benefits in minimizing energy consumption. These benefits have prompted significant research in developing algorithms for achieving optimal rate adaptation while satisfying quality of service requirements. In this book, we provide a comprehensive study of dynamic rate control for energy minimization under packet delay constraints. We present several formulations and approaches adopted in the literature ranging from discrete-time formulations and dynamic programming based solutions to continuous-time approaches utilizing ideas from network calculus and stochastic optimal control theory. The goal of this book is to expose the reader to the important problem of wireless data transmission with delay constraints and to the rich set of tools developed in recent years to address it. Table of Contents: Introduction / Transmission Rate Adaptation under Deadline Constraints / Average Delay Constraints
Download or read book Applied Probability and Stochastic Processes written by V. C. Joshua and published by Springer Nature. This book was released on 2020-08-29 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers selected papers presented at the International Conference on Advances in Applied Probability and Stochastic Processes, held at CMS College, Kerala, India, on 7–10 January 2019. It showcases high-quality research conducted in the field of applied probability and stochastic processes by focusing on techniques for the modelling and analysis of systems evolving with time. Further, it discusses the applications of stochastic modelling in queuing theory, reliability, inventory, financial mathematics, operations research, and more. This book is intended for a broad audience, ranging from researchers interested in applied probability, stochastic modelling with reference to queuing theory, inventory, and reliability, to those working in industries such as communication and computer networks, distributed information systems, next-generation communication systems, intelligent transportation networks, and financial markets.
