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Author: Ning Yang Publisher: ISBN: Category : Languages : en Pages :
Book Description
ABSTRACT: To improve the performance for wireless networks, we implemented a congestion-aware cross-layer design in NS-2. The MAC layer adaptively selects a transmission data rate based on the channel signal strength information from physical layer and congestion information from network layer. The MAC layer utilization gathered at MAC layer is sent to DSR as a congestion aware routing metric for optimal route discovery. We modified the source codes of 802.11 MAC layer and DSR protocol. The simulations show that rate adaptation in MAC layer improves the network performance in terms of throughput, delivery ratio, and end-to-end delay; using congestion information from MAC layer in routing discovery improves the performance of the network benefited from overall network load balance.
Author: Ning Yang Publisher: ISBN: Category : Languages : en Pages :
Book Description
ABSTRACT: To improve the performance for wireless networks, we implemented a congestion-aware cross-layer design in NS-2. The MAC layer adaptively selects a transmission data rate based on the channel signal strength information from physical layer and congestion information from network layer. The MAC layer utilization gathered at MAC layer is sent to DSR as a congestion aware routing metric for optimal route discovery. We modified the source codes of 802.11 MAC layer and DSR protocol. The simulations show that rate adaptation in MAC layer improves the network performance in terms of throughput, delivery ratio, and end-to-end delay; using congestion information from MAC layer in routing discovery improves the performance of the network benefited from overall network load balance.
Author: Radhakrishna Maringanti Publisher: Springer Science & Business ISBN: 813221823X Category : Technology & Engineering Languages : en Pages : 265
Book Description
Wireless communication and sensor networks would form the backbone to create pervasive and ubiquitous environments that would have profound influence on the society and thus are important to the society. The wireless communication technologies and wireless sensor networks would encompass a wide range of domains such as HW devices such as motes, sensors and associated instrumentation, actuators, transmitters, receivers, antennas, etc., sensor network aspects such as topologies, routing algorithms, integration of heterogeneous network elements and topologies, designing RF devices and systems for energy efficiency and reliability etc. These sensor networks would provide opportunity to continuously and in a distributed manner monitor the environment and generate the necessary warnings and actions. However most of the developments have been demonstrated only in controlled and laboratory environments. So we are yet to see those powerful, ubiquitous applications for the benefit of the society. The conference and consequentially the proceedings would provide opportunity to the researchers to interact with other researchers and share their researches covering all the above areas. The proceedings of the conference thus covers the research work of different authors in the area of wireless sensor networks, wireless communications, devices, tools and techniques for WSN, and applications of wireless sensor networks. This book is beneficial for those researchers who are working in the area of wireless sensor networks, wireless communication, and developing applications of Wireless sensor networks.
Author: Wei Liu Publisher: ISBN: Category : Computer networks Languages : en Pages :
Book Description
The basic idea of Courtesy Piggybacking is to let high priority traffic help the low priority traffic by sharing the unused residual bandwidth. As a result, the scheme improves the overall performance for different prioritized services. Finally, we propose an energy efficient, reliable and scalable data dissemination scheme for wireless sensor networks. Based on supply chain management methodology, for each sensing task, the sensor field is conceptually partitioned into several functional areas, and then different routing schemes are applied in different areas. This scheme addresses energy-efficiency, reliability, and scalability at the same time.
Author: Symeon Papavassiliou Publisher: Springer ISBN: 3319196626 Category : Computers Languages : en Pages : 422
Book Description
This book constitutes the proceedings of the 14th International Conference on Ad Hoc Networks and Wireless, ADHOC-NOW 2015, held in Athens, Greece in June/July 2015. The 25 full papers presented in this volume were carefully reviewed and selected from 52 submissions. The book also contains 3 full-paper invited talks. The contributions are organized in topical sections named: routing, connectivity, and resource allocation; localization, sensor deployment, and mobility management; distributed computing with mobile agents; efficient, reliable, and secure smart energy networks; and emerging communications, networking and computing technologies for VANETs 2.0.
Author: Rajamani Ganesh Publisher: Springer Science & Business Media ISBN: 0387230726 Category : Technology & Engineering Languages : en Pages : 327
Book Description
Emerging Location Aware Broadband Wireless Ad Hoc Networks is a compilation of new material on wireless networking and technology addressing several technical challenges in the field. The contributions are authored by distinguished experts who presented experimental results on their work at the recent International Symposium on Personal, Indoor, Mobile, Radio Communications (PIMRC) held in Barcelona, Spain, September 5-8, 2004. The authors present new results on issues involving wireless LANs and ad hoc networks; mobile wireless internet and satellite applications; encoding, algorithms and performance; and issues related to overlay networks, cross layer interactions and smart antennas. Whether you’re a telecommunications/networking specialist, systems engineer or a scientist, Emerging Location Aware Broadband Wireless Ad Hoc Networks provides valuable insight from experts in wireless networking for developing wireless systems and meeting future application requirements.
Author: Vivek Raghunathan Publisher: ProQuest ISBN: 9780549344728 Category : Languages : en Pages : 197
Book Description
Our candidate stack uses traffic adaptive multipath routing to guide packets probabilistically around network bottlenecks, and automatically create interference-aware routes. Recognizing that theoretical arguments require a cross layer re-design of TCP taking wireless interference into account, our work suggests the use of in-network congestion control to automatically adapt flow rates inside the network.
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: Ning Yang
Author: Ning Yang
Author: Bozidar Radunovic
Author: Stavros Toumpis
Author: Radhakrishna Maringanti
Author: Wei Liu
Author: Symeon Papavassiliou
Author: Rajamani Ganesh
Author: Vivek Raghunathan
Author: Yuan Xue
Author: Anita Yadav