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Author: Subhasis Das
Publisher:
ISBN: 9783659908040
Category :
Languages : en
Pages : 84
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Book Description
Author: Subhasis Das
Publisher:
ISBN: 9783659908040
Category :
Languages : en
Pages : 84
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Book Description
Author: Sherin Abdel Hamid
Publisher: Springer Science & Business Media
ISBN: 1461463572
Category : Computers
Languages : en
Pages : 81
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Book Description
The focus of this brief is to identify what unifies and what distinguishes the routing functions in four wireless multi-hop network paradigms. The brief introduces a generic routing model that can be used as a foundation of wireless multi-hop routing protocol analysis and design. It demonstrates that such model can be adopted by any wireless multi-hop routing protocol. Also presented is a glimpse of the ideal wireless multi-hop routing protocol along with several open issues.
Author: Kai Zeng
Publisher: John Wiley & Sons
ISBN: 1119974291
Category : Technology & Engineering
Languages : en
Pages : 211
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Book Description
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.
Author: Fikret Sivrikaya
Publisher: ProQuest
ISBN: 9780549455080
Category : Computer science
Languages : en
Pages : 310
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Book Description
Author: Young-Jun Lee
Publisher:
ISBN:
Category : Computer network protocols
Languages : en
Pages :
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Book Description
In this dissertation, routing protocols, load-balancing protocols, and efficient evaluation techniques for multi-hop mobile wireless networks are explored. With the advancements made in wireless communication and computer technologies, a new type of mobile wireless network, known as a mobile ad hoc network (MANET), has drawn constant attention. In recent years, several routing protocols for MANETs have been proposed. However, there still remains the need for mechanisms for better scalability support with respect to network size, traffic volume, and mobility. To address this issue, a new method for multi-hop routing in MANETs called Dynamic NIx-Vector Routing (DNVR) is proposed. DNVR has several distinct features compared to other existing on-demand routing protocols, which lead to more stable routes and better scalability. Currently, ad hoc routing protocols lack load-balancing capabilities. Therefore they often fail to provide good service quality, especially in the presence of a large volume of network traffic since the network load concentrates on some nodes, resulting in a highly congested environment. To address this issue, a novel load-balancing technique for ad hoc on-demand routing protocols is proposed. The new method is simple but very effective in achieving load balance and congestion alleviation. In addition, it operates in a completely distributed fashion. To evaluate and verify wireless network protocols effectively, especially to test their scalability properties, scalable and efficient network simulation methods are required. Usually simulation of such large-scale wireless networks needs a long execution time and requires a large amount of computing resources such as powerful CPUs and memory. Traditionally, to cope with this problem, parallel network simulation techniques with parallel computing capabilities have been considered. This dissertation explores a different type of method, which is efficient and can be achieved with a sequential simulation, as well as a parallel and distributed technique for large-scale mobile wireless networks.
Author: Dr.D.Usha
Publisher: SK Research Group of Companies
ISBN: 9391077943
Category : Technology & Engineering
Languages : en
Pages : 106
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Book Description
Dr.D.Usha, Assistant Professor, Department of Computer Science, Mother Teresa Womens University, Kodaikanal, Tamil Nadu, India
Author: Arnab Das
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
In this thesis, we study multi-hop versions of two classes of wireless networks: (a) Mobile Ad HocNetworks (MANETs) and (b) Wireless Mesh Networks (WMNs). Our primary focus is to developreliable structures for MANETs and energy-efficient implementations for WMNs.We study a MANET setting where each node in the MANET engages in deliberate and discreetpacket-dropping at a certain rate, while relaying on behalf of other nodes. Assuming the nodesto be non-cooperative, we develop a scheme in which each source node would blame its nearestneighbor for any packet dropped along the multi-hop path vector. This is simple, but elegant, asit still reveals the true relative dropping rates of each packet-dropping node in the MANET.We then propose a novel scheme for improving the overall performance or robustness of such aMANET by adopting a routing strategy which considers the recent packet-dropping performance(reputation) of intermediate relaying nodes in determining the best route from a source to a destination.For deciding the best route, we propose the use of mechanisms based on the modification of theAd Hoc On-Demand Distance Vector (AODV) routing protocol. As opposed to the AODV scheme,which uses a broadcast mechanism for route discovery, the proposed scheme (called Robust AODVor RAODV) considers the reputation levels of neighboring nodes to determine the node(s) to whichthe route discovery packet should be sent.In connection with WMNs, we study a WMN structure deployed for residential broadband Internet access and WMN applications for Wireless Sensor Networks (WSNs).Our WMN model deployed for residential broadband Internet access has a specific topology ofthree tiers comprising WMN infrastructure nodes or Mesh Access Points (MAPs), fixed, in-rangeend-users or end-user Stations (STAs), and potentially mobile, out-of-range end-users or Mobile-STAs (M-STAs). Our interest is only at the edge as our primary focus is the range extension of the WMN to M-STAs via the relaying services of STAs. We develop an iterative game model in whichthe relaying STAs engage in deliberate packet-dropping of M-STA packets for their own throughputgain.We next extend the model to include the scenario in which the MAP and the STAs are networkservice providers in respectively a primary and a secondary market. The STAs do not engage indeliberate packet-dropping, since they are now wholly responsible for providing traffic to the M-STAs, and as a result will lose revenue. Obviously, the second model is better for mobile end-users(M-STAs) as they receive better service since STAs do not drop packets in this scenario for theirown selfish reasons.We then investigate WMNs used in Advanced Metering Infrastructure (AMI), which is a formof WSN. These WMNs usually consist of a collection of Neighborhood Area Networks (NANs),which include smart, wireless-enabled meters or sensor nodes.We present an elegant approach to reducing the cost of the AMIs by increasing the ratio of thenumber of sensors/meters in Neighborhood Area Networks (NANs) to the number of Access Points(APs) or gateways.Finally, we propose schemes for energy conservation in Industrial Wireless Sensor Networks(IWSNs), which are variants of WMNs. Our contribution integrates new approaches to partitioning an IWSN into energy-efficient clusters with a graph-theoretical framework for energy-efficient routing within a cluster. The concept of betweenness centrality is demonstrated to be a useful metric to optimize the placement of the cluster head within an IWSN cluster in our clustering approach.In addition, our strategy combines a novel scheme for duty cycling of the nodes in a cluster tofurther minimize energy expenditure in an IWSN. Betweenness centrality is also used as a metricfor developing a duty-cycling approach to further minimize the energy consumption in an IWSN.Most of the previous contributions have dealt with only one particular approach to minimizingenergy consumption in an IWSN. The emphasis in some of them has been on efficient partitioningof the IWSN into clusters, while others have dealt with energy-efficient routing or effective approachto duty cycling of sensor nodes.In contrast, this contribution integrates a new graph-theoretical framework for partitioning anIWSN into energy-efficient clusters, a minimum-cost (i.e., energy-efficient) routing scheme withina cluster, and a novel duty-cycling scheme to further minimize the cluster's energy consumption.
Author: Swades Kumar De
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
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Book Description
Author: Zhengguo Sheng
Publisher: CRC Press
ISBN: 1482238217
Category : Computers
Languages : en
Pages : 223
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Book Description
Compared with conventional communications, cooperative communication allows multiple users in a wireless network to coordinate their packet transmissions and share each other's resources, thus achieving high-performance gain and better service coverage and reliability. Energy Efficient Cooperative Wireless Communication and Networks provides a comprehensive look at energy efficiency and system design of cooperative wireless communication. Introducing effective cooperative wireless communication schemes, the book supplies the understanding and methods required to improve energy efficiency, reliability, and end-to-end protocol designs for wireless communication systems. It explains the practical benefits and limitations of cooperative transmissions along with the associated designs of upper-layer protocols, including MAC, routing, and transport protocol. The book considers power efficiency as a main objective in cooperative communication to ensure quality-of-service (QoS) requirements. It explains how to bring the performance gain at the physical layer up to the network layer and how to allocate network resources dynamically through MAC/scheduling and routing to trade off the performance benefits of given transmissions against network costs. Because the techniques detailed in each chapter can help readers achieve energy efficiency and reliability in wireless networks, they have the potential to impact a range of industry areas, including wireless communication, wireless sensor networks, and ad hoc networks. The book includes numerous examples, best practices, and models that capture key issues in real-world applications. Along with algorithms and tips for effective design, the book supplies the understanding you will need to achieve high-performing and energy efficient wireless networks with improved service coverage and reliability.
Author: Chai K Toh
Publisher: Pearson Education
ISBN: 0132442043
Category : Technology & Engineering
Languages : en
Pages : 502
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Book Description
The authoritative guide to the state of the art in ad hoc wireless networking. Reflects the field's latest breakthroughs Covers media access, routing, service discovery, multicasting, power conservation, transport protocol, and much more Includes a complete narration of prototype implementation with communication performance results from practical field trials Introduces key applications for home, business, auto, and defense "Ad hoc" wireless networks eliminate the complexities of infrastructure setup and administration, enabling devices to create and join networks "on the fly"-anywhere, anytime, for virtually any application. The field is rapidly coming of age, reflecting powerful advances in protocols, systems, and real-world implementation experience. In Ad Hoc Mobile Wireless Networks, one of the field's leading researchers brings together these advances in a single consolidated and comprehensive archive. C.K. Toh covers all this, and more: Key challenges: device heterogeneity, diverse traffic profiles, mobility, and power conservation Routing protocols for ad hoc networks, including Associativity Based Routing (ABR) and other IETF MANET protocols Real-world implementation issues-including a complete prototype implementation Ad hoc wireless network performance: results obtained from the latest field trials Leading approaches to service discovery Addressing TCP over an ad hoc wireless network environment Support for multicast communications The role of Bluetooth and WAP Ad Hoc Mobile Wireless Networks introduces detailed application scenarios ranging from home and car to office and battlefield. C.K. Toh also introduces several of the field's leading projects, from Motorola's PIANO platform to UC Berkeley's "Smart Dust." Whether you're a researcher, scientist, implementer, consultant, technical manager, CTO, or student, you won't find a more authoritative and comprehensive guide to the new state of the art in ad hoc networking.
