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Author: Yamin Samir Al-Mousa Publisher: ISBN: Category : Ad hoc networks (Computer networks) Languages : en Pages : 400
Book Description
"MANETs are coping with major challenges such as the lack of infrastructure and mobility which causes networks topology to change dynamically. Due to limited resources, nodes have to collaborate and rely packets on the behalf of neighbors to reach their destinations forming multi-hop paths. The selection and maintenance of multi-hop paths is a challenging task as their stability and availability depend on the mobility of participating nodes, where paths used a few moments earlier would be rendered invalid due to ever changing topology. The purpose of a routing protocol is to establish and select valid paths between communicating nodes and repair or remove invalid ones. As mobility rate increases, routing protocols spend more time in path maintenance and less time in actual data communication, degrading network performance. This interaction among mobility, topology and routing performance is usually empirically studied through simulations. This dissertation will provide a novel deep analytical study of the root cause of performance degradation with mobility. This is accomplished by, firstly, studying how mobility impacts durations of topology paths called Topological modeling. Secondly, analyzing how routing protocols adapt to topology changes in Adaptability modeling which identifies AdaptationDelays representing the time taken by a routing protocol to translate a change in topology to logical information used in path selection. Combining the results from these two studies, performance models of routing protocols are obtained, which later is used to optimize its operation. This study is applied on two tree-based proactive routing protocols, the Optimized Link State Routing and the Multi-Meshed Tree."--Abstract.
Author: Yamin Samir Al-Mousa Publisher: ISBN: Category : Ad hoc networks (Computer networks) Languages : en Pages : 400
Book Description
"MANETs are coping with major challenges such as the lack of infrastructure and mobility which causes networks topology to change dynamically. Due to limited resources, nodes have to collaborate and rely packets on the behalf of neighbors to reach their destinations forming multi-hop paths. The selection and maintenance of multi-hop paths is a challenging task as their stability and availability depend on the mobility of participating nodes, where paths used a few moments earlier would be rendered invalid due to ever changing topology. The purpose of a routing protocol is to establish and select valid paths between communicating nodes and repair or remove invalid ones. As mobility rate increases, routing protocols spend more time in path maintenance and less time in actual data communication, degrading network performance. This interaction among mobility, topology and routing performance is usually empirically studied through simulations. This dissertation will provide a novel deep analytical study of the root cause of performance degradation with mobility. This is accomplished by, firstly, studying how mobility impacts durations of topology paths called Topological modeling. Secondly, analyzing how routing protocols adapt to topology changes in Adaptability modeling which identifies AdaptationDelays representing the time taken by a routing protocol to translate a change in topology to logical information used in path selection. Combining the results from these two studies, performance models of routing protocols are obtained, which later is used to optimize its operation. This study is applied on two tree-based proactive routing protocols, the Optimized Link State Routing and the Multi-Meshed Tree."--Abstract.
Author: G Ram Mohana Reddy Publisher: CRC Press ISBN: 1315351633 Category : Computers Languages : en Pages : 139
Book Description
In recent years, a lot of work has been done in an effort to incorporate Swarm Intelligence (SI) techniques in building an adaptive routing protocol for Mobile Ad Hoc Networks (MANETs). Since centralized approach for routing in MANETs generally lacks in scalability and fault-tolerance, SI techniques provide a natural solution through a distributed approach for the adaptive routing for MANETs. In SI techniques, the captivating features of insects or mammals are correlated with the real world problems to find solutions. Recently, several applications of bio-inspired and nature-inspired algorithms in telecommunications and computer networks have achieved remarkable success. The main aims/objectives of this book, "Mobile Ad Hoc Networks: Bio-Inspired Quality of Service Aware Routing Protocols", are twofold; firstly it clearly distinguishes between principles of traditional routing protocols and SI based routing protocols, while explaining in detail the analogy between MANETs and SI principles. Secondly, it presents the readers with important Quality of Service (QoS) parameters and explains how SI based routing protocols achieves QoS demands of the applications. This book also gives quantitative and qualitative analysis of some of the SI based routing protocols for MANETs.
Author: Azzedine Boukerche Publisher: John Wiley & Sons ISBN: 0470396377 Category : Technology & Engineering Languages : en Pages : 520
Book Description
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.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Recent advances in low-power technologies have resulted in the proliferation of inexpensive handheld mobile computing devices. Soon, just like the Internet empowered a whole new world of applications for personal computers, the development and deployment of robust ubiquitous wireless networks will enable many new and excitingfuturistic applications. Certain to be an important part of this future is a class of networks known as "mobile ad hoc networks." Mobile ad hoc networks (or simply"ad hoc networks") are local-area networks formed "on the spot" between collocated wireless devices. These devices self-organize by sharing information with their neigh-bors to establish communication pathways whenever and wherever they are. For adhoc networks to succeed, however, new protocols must be developed that are capable of adapting to their dynamic nature. Inthis dissertation, we present a number of adaptive protocols that are designed for this purpose. We investigate new link layer mechanisms that dynamically monitor and adapt to changes in link quality, including a protocol that uses common control messages to form a tight feedback control loop for adaptation of the link data rate to best match the channel conditions perceived by the receiver. We also investigate routing protocols that adapt route selection according to network characteristics. In particular, we present two on-demand routing protocols that are designed to take advantage of the presence of multirate links. We then investigate the performance of TCP, showing how communication outages caused by link failures and routing delays can be very detrimental to its performance. In response, we present a solution to this problem that uses explicit feedback messages from the link layer about link failures to adapt TCP's behavior. Finally, we show how link failures in heterogeneous networks containing links with widely varying bandwidth and delay can cause repeated "modal" changes in capacity that TCP is slow to detect. We then present a modifed version of TCP that is capable of more rapidly detecting and adapting to these changes.
Author: Anwar Ali Publisher: GRIN Verlag ISBN: 3656389152 Category : Computers Languages : en Pages : 8
Book Description
Research Paper (postgraduate) from the year 2012 in the subject Engineering - Computer Engineering, , language: English, abstract: Mobile Ad-hoc network popularly known as MANETs, consists of mobile nodes without any fixed infra-structure, where each node actively participates in routing a multi-rate network employs nodes with different data rates, radio range and bandwidth. A heterogeneous MANET has various kinds of mobile nodes. Thus to deliver message from source to destination or to have per-to-peer communication it not only requires a route establishment but also to ensure minimum delay. we attempt to analyze various delays involving in packet transmission with mathematical formulation and conditions subjected to certain assumption .This mathematical modeling proves to be sufficient to answer the QoS demands like finding the path with minimum delay among the available paths from source to destination, taking into consideration the route parameters like geographic distance and data rate. Another application is the packetizing (or) packet/cell framing to utilize other paths whose data rates may be degraded, this increase the utility and efficiency of overall network. Minimum delay routing protocol (MDRP) can also be used to determine the routes having same delay though they may differ in terms of geographical distances and data rates. Such approach will efficient in multimedia transmission over parallel links with minimum delay jitters. Various critical situations have been solved using proposed techniques as examples to validate the protocol.
Author: Anita Yadav Publisher: GRIN Verlag ISBN: 3346132161 Category : Computers Languages : en Pages : 142
Book Description
Doctoral Thesis / Dissertation from the year 2016 in the subject Computer Science - Miscellaneous, grade: 16, , language: English, abstract: In this thesis, we have modified AODV routing protocol by incorporating link prediction algorithm using a proposed link prediction model. This algorithm predicts the link availability time and even before the link breaks; either it repairs the route locally or sends information to the source nodes to enable them to initiate a new route search well in time. This algorithm improves the quality of service of the network. Simulation results show that AODV routing algorithm with link availability model performs better than the existing AODV. Advances in wireless technology and hand-held computing devices have brought revolution in the area of mobile communication. The increasing mobility of humans across the globe generated demand for infrastructure-less and quickly deployable mobile networks. Such networks are referred to as Mobile Adhoc Networks (MANET). Usually, nodes in a MANET also act as a router while being is free to roam while communicating each others. Adhoc networks are suited for use in situations where infrastructure is unavailable or to deploy one is not cost-effective. Frequent changes in network topology due to mobility and limited battery power of the mobile devices are the key challenges in the adhoc networks. The depletion of power source may cause early unavailability of nodes and thus links in the network. The mobility of nodes will also causes frequent routes breaks and adversely affects the required performance for the applications. Availability of a route in future mainly depends on the availability of links between the nodes forming the route. Therefore, it is important to predict the future availability of a link that is currently available. We have proposed an analytical model for link prediction using Newton divided difference method. This link availability algorithm is incorporated in AODV routing algorithm (AODVLP) to evaluate the performance of AODV routing protocol using the metrics viz. delivery rate, average end-to-end delay, average RTS collisions per node and route failure. In the existing AODV protocol, packets are routed until a link in the existing path fails. This results in degradation of quality of service of network in terms of end-to-end delay and delivery ratio.
Author: Dr.Prakash Kumar Publisher: BookRix ISBN: 3748776977 Category : Computers Languages : en Pages : 29
Book Description
The rapid evolution of wireless technology has made people's needs for communication and access to information grows even faster. The fact that anyone can be reached at any time and any place has become extremely convenient, for some it as even become mandatory. The advent of the Internet has made any information easily accessible and we now expect the same on-the-go. Wireless communications have been in constant evolution for the past few years, the best known example being cellular networks which provide people with communication services along with the freedom of movement. Unfortunately physical constraints that arise when working with wireless technology make it difficult to provide such services everywhere, especially indoors. This text book is written in simple and easily understandable language. I (Dr.Prakash Kumar)made sincere attempt to analyze every topic completely and put before the readers of this book in the best presentable form. The book covers all the syllabus of the subject 'Mobile Ad-Hoc Networks' for UG and PG students of Computer Science. from the basic to advance points
Author: Chai K Toh Publisher: Pearson Education ISBN: 0132442043 Category : Technology & Engineering Languages : en Pages : 502
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.
Author: Yamin Samir Al-Mousa
Author: Yamin Samir Al-Mousa
Author: G Ram Mohana Reddy
Author: Azzedine Boukerche
Author: Dusit Niyato
Author: 
Author: Anwar Ali
Author: Jeff Boleng
Author: Anita Yadav
Author: Dr.Prakash Kumar
Author: Chai K Toh