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A Comprehensive Optimization Model for Multi-hop Wireless Networks with Multicast Traffic

2022
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Release : 2022
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Book Synopsis A Comprehensive Optimization Model for Multi-hop Wireless Networks with Multicast Traffic by : Bartłomiej Ostrowski

Download or read book A Comprehensive Optimization Model for Multi-hop Wireless Networks with Multicast Traffic written by Bartłomiej Ostrowski. This book was released on 2022. Available in PDF, EPUB and Kindle. Book excerpt: Dotyczy: multi-hop wireless networks, TDMA, multicast traffic, optimization, integer programming, Internet of Things, kratowe sieci radiowe, TDMA, ruch multicastowy, optymalizacja, programowanie całkowitoliczbowe, Internet Rzeczy.

Model-driven Optimization of Multihop Wireless Networks

2008 Electric interference
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Release : 2008
Genre : Electric interference
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Book Synopsis Model-driven Optimization of Multihop Wireless Networks by : Yi Li (doctor of computer science.)

Download or read book Model-driven Optimization of Multihop Wireless Networks written by Yi Li (doctor of computer science.). This book was released on 2008. Available in PDF, EPUB and Kindle. Book excerpt: Interference is fundamental to wireless networks. It is hard to achieve good performance when design routing metrics or algorithms without taking it into account. We study interference in wireless networks through empirical experiments and simulations. We find out that current routing protocols face difficulties in effectively managing it, which can lead to severe problems. For instance, a simple network of two links with one flow is vulnerable to severe performance degradation if interference is not properly accounted for. Motivated by these observations, we develop a simple and effective model to capture effects of interference in a wireless network. Different from the existing interference models, our model captures IEEE 802.11 DCF under both homogeneous and heterogeneous traffic and link characteristics, and is simple enough to be directly used as a basic building block for wireless performance optimization. Based on thismodel, we develop optimization algorithms for several objectives, such as network throughput and fairness. Given traffic demands as input, these algorithms compute rates at which individual flows must send to achieve these objectives. We implement these algorithms in Qualnet simulations and 19-node testbed. Our experiment and simulation results show that our methods can systematically account for and control interference to achieve good performance. More specifically, when optimizing fairness, our methods can achieve almost perfect fairness; when optimizing network throughput, they can lead to 100-200% improvement for UDP traffic and 10-50% for TCP traffic.

Optimisation Models and Algorithms for Multicast Message Routing and Power Control in Wireless Multihop Networks

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Book Synopsis Optimisation Models and Algorithms for Multicast Message Routing and Power Control in Wireless Multihop Networks by :

Download or read book Optimisation Models and Algorithms for Multicast Message Routing and Power Control in Wireless Multihop Networks written by . This book was released on . Available in PDF, EPUB and Kindle. Book excerpt: The data capacity of a link within a wireless network depends in a nonlinear way on the communication resources allocated to it. Finding the optimal way to transmit data through a network consisting of many wireless devices can therefore be represented as a nonlinear optimization problem over network flow variables and communication resource variables. In this thesis we develop a nonconvex optimization problem for transmitting unicast and multicast messages through a time-slotted multi-hop wireless network. Multicast messages are handled in an optimal way through the use of network coding to allow data packets to be combined ensuring they are useful for multiple destinations. The benefits of network coding over other routing strategies are tested numerically. We look at simple networks to gain insight into the way various parameters affect the nonconvex behaviour before going on to develop algorithms which can be applied in a distributed manner, and make use of the coupled structure of the problem. We implement a subgradient method for solving the dual problem, and then look at ways to accelerate its convergence. We also investigate the behaviour and convergence of a simple but effective primal co-ordinate descent method before numerically investigating its performance.

Optimization and Algorithms for Protocol Design in Wireless Networks

2008
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Release : 2008
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Book Rating : 361/5 ( reviews)

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Book Synopsis Optimization and Algorithms for Protocol Design in Wireless Networks by : Loc Xuan Bui

Download or read book Optimization and Algorithms for Protocol Design in Wireless Networks written by Loc Xuan Bui. This book was released on 2008. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation addresses certain key problems in the design of an efficient protocol stack for multihop wireless networks. We focus on the following issues: how to extend the network utility maximization (NUM) framework for resource allocation to handle both unicast and multicast traffic, and how to deal with practical issues which arise from the optimal back-pressure algorithm suggested by the NUM framework. Those practical issues consist of decentralization and complexity, as well as scalability and delay performance.

Multihop Wireless Networks

2011-07-13 Technology & Engineering
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Release : 2011-07-13
Genre : Technology & Engineering
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Book Rating : 291/5 ( reviews)

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Book Synopsis Multihop Wireless Networks by : Kai Zeng

Download or read book Multihop Wireless Networks written by Kai Zeng. This book was released on 2011-07-13. 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.

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