The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform

Maria Fernandez - One of the best experts on this subject based on the ideXlab platform.

  • ICNP - Geocast for wireless sensor networks
    2011 19th IEEE International Conference on Network Protocols, 2011
    Co-Authors: Rajesh Krishna Panta, Robert J. Hall, Josh Auzins, Maria Fernandez
    Abstract:

    An important but relatively less studied class of network layer protocol for sensor networks is geocast. It allows a sensor node to send messages to all nodes in a given geographical Area without the sender node having any knowledge about which nodes are present in that Area. Developing a robust geocast protocol for practical sensor networks poses several challenges. Geocast messages should be reliably delivered to the Destination Area in the presence of unreliable wireless links, a typical characteristic of practical sensor network deployments. The protocol should minimize the number of radio transmissions and avoid control traffic to save energy, which is a scarce resource in sensor networks. The protocol should be robust against a wide range of network densities. This paper presents the design, implementation, and evaluation of SGcast — a reliable, robust, and energy-efficient geocast protocol that achieves these goals. For a wide range of experiments conducted using networks of real sensor nodes and simulations, we show that compared to a recent geocast protocol, SGcast achieves up to 11.08x reduction in energy consumption and up to 2.17x improvement in successful delivery of geocast messages to the Destination Area, while being robust against a wide variability in network densities.

  • Geocast for wireless sensor networks
    2011 19th IEEE International Conference on Network Protocols, 2011
    Co-Authors: Rajesh Krishna Panta, Robert J. Hall, Josh Auzins, Maria Fernandez
    Abstract:

    An important but relatively less studied class of network layer protocol for sensor networks is geocast. It allows a sensor node to send messages to all nodes in a given geographical Area without the sender node having any knowledge about which nodes are present in that Area. Developing a robust geocast protocol for practical sensor networks poses several challenges. Geocast messages should be reliably delivered to the Destination Area in the presence of unreliable wireless links, a typical characteristic of practical sensor network deployments. The protocol should minimize the number of radio transmissions and avoid control traffic to save energy, which is a scarce resource in sensor networks. The protocol should be robust against a wide range of network densities. This paper presents the design, implementation, and evaluation of SGcast - a reliable, robust, and energy-efficient geocast protocol that achieves these goals. For a wide range of experiments conducted using networks of real sensor nodes and simulations, we show that compared to a recent geocast protocol, SGcast achieves up to 11.08x reduction in energy consumption and up to 2.17x improvement in successful delivery of geocast messages to the Destination Area, while being robust against a wide variability in network densities.

Bin Fu - One of the best experts on this subject based on the ideXlab platform.

  • RSU-Assisted Geocast in Vehicular Ad Hoc Networks
    IEEE Wireless Communications, 2017
    Co-Authors: Peng Li, Tao Zhang, Chuanhe Huang, Xi Chen, Bin Fu
    Abstract:

    Geocast, delivering a message to nodes within a geographical region, is an important issue in VANETs. In this article, we address the geocast problem in VANETs. Given a piece of a message, we must find the minimal cost to relay the message to a specific vehicle in a given geographical Area. To solve this problem, we propose an RSU RAG approach for VANETs. We use a quadtree model that represents a hierarchical decomposition of the global region. Then we propose a tree trimming approach to search the intersection between the Destination Area and the quadtree. Based on the quadtree model, we propose an election approach that selects an optimal RSU to forward the message to the Destination Area. Theoretical analysis is given about the complexity to search the quadtree. Extensive simulations show that the performance of our proposed method is superior to other approaches.

Martin Mauve - One of the best experts on this subject based on the ideXlab platform.

  • Predicting Parking Lot Occupancy in Vehicular Ad Hoc Networks
    2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring, 2007
    Co-Authors: Murat Caliskan, Andreas Barthels, Bjorn Scheuermann, Martin Mauve
    Abstract:

    The search for free parking places is a promising application for vehicular ad hoc networks (VANETs). In order to guide drivers to a free parking place at their Destination, it is necessary to estimate the occupancy state of the parking lots within the Destination Area at time of arrival. In this paper, we present a model to predict parking lot occupancy based on information exchanged among vehicles. In particular, our model takes the age of received parking lot information and the time needed to arrive at a certain parking lot into account and estimates the future parking situation at time of arrival. It is based on queueing theory and uses a continuous-time homogeneous Markov model. We have evaluated the model in a simulation study based on a detailed model of the city of Brunswick, Germany.

Rajesh Krishna Panta - One of the best experts on this subject based on the ideXlab platform.

  • ICNP - Geocast for wireless sensor networks
    2011 19th IEEE International Conference on Network Protocols, 2011
    Co-Authors: Rajesh Krishna Panta, Robert J. Hall, Josh Auzins, Maria Fernandez
    Abstract:

    An important but relatively less studied class of network layer protocol for sensor networks is geocast. It allows a sensor node to send messages to all nodes in a given geographical Area without the sender node having any knowledge about which nodes are present in that Area. Developing a robust geocast protocol for practical sensor networks poses several challenges. Geocast messages should be reliably delivered to the Destination Area in the presence of unreliable wireless links, a typical characteristic of practical sensor network deployments. The protocol should minimize the number of radio transmissions and avoid control traffic to save energy, which is a scarce resource in sensor networks. The protocol should be robust against a wide range of network densities. This paper presents the design, implementation, and evaluation of SGcast — a reliable, robust, and energy-efficient geocast protocol that achieves these goals. For a wide range of experiments conducted using networks of real sensor nodes and simulations, we show that compared to a recent geocast protocol, SGcast achieves up to 11.08x reduction in energy consumption and up to 2.17x improvement in successful delivery of geocast messages to the Destination Area, while being robust against a wide variability in network densities.

  • Geocast for wireless sensor networks
    2011 19th IEEE International Conference on Network Protocols, 2011
    Co-Authors: Rajesh Krishna Panta, Robert J. Hall, Josh Auzins, Maria Fernandez
    Abstract:

    An important but relatively less studied class of network layer protocol for sensor networks is geocast. It allows a sensor node to send messages to all nodes in a given geographical Area without the sender node having any knowledge about which nodes are present in that Area. Developing a robust geocast protocol for practical sensor networks poses several challenges. Geocast messages should be reliably delivered to the Destination Area in the presence of unreliable wireless links, a typical characteristic of practical sensor network deployments. The protocol should minimize the number of radio transmissions and avoid control traffic to save energy, which is a scarce resource in sensor networks. The protocol should be robust against a wide range of network densities. This paper presents the design, implementation, and evaluation of SGcast - a reliable, robust, and energy-efficient geocast protocol that achieves these goals. For a wide range of experiments conducted using networks of real sensor nodes and simulations, we show that compared to a recent geocast protocol, SGcast achieves up to 11.08x reduction in energy consumption and up to 2.17x improvement in successful delivery of geocast messages to the Destination Area, while being robust against a wide variability in network densities.

Wen Li - One of the best experts on this subject based on the ideXlab platform.

  • Efficient and Reliable Abiding Geocast Based on Carrier Sets for Vehicular Ad Hoc Networks
    IEEE Wireless Communications Letters, 2016
    Co-Authors: Xinming Zhang, Wen Li
    Abstract:

    In vehicular ad hoc networks, abiding geocast requires a persistent dissemination of information to an Area within a period of time. Conventional periodical broadcast schemes need broadcast to the whole Destination Area in a multi-hop manner for each cycle, which produces significant network overhead. Besides, the fixed broadcast cycle cannot match the change of network topology, which may induce inefficient transmissions. Moreover, they cannot guarantee the reliability when the link quality is poor. In this letter, we propose an abiding geocast protocol based on carrier sets. Carrier sets are backbones set-up and maintained based on stability estimation index in each street. Uncovered vehicles passing by a Destination Area can get abiding messages through one-hop delivery from vehicles in carrier sets when they need the messages, which not only avoids significant overhead produced by multi-hop broadcast but also enhances the receiving probability. Simulation results have shown that our protocol is efficient and reliable.