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This paper analyses the performance of a new routing protocol for vehicular delay-tolerant networks, called GeoSpray. This geographic routing protocol performs a store-carry-and-forward, combining replication and forwarding/ routing decisions based on location information, with explicit delivery acknowledgments to improve network resources utilization. The performance of the proposed routing protocol...
Vehicular Delay-Tolerant Network (VDTN) is a new disruptive network architecture where vehicles act as the communication infrastructure, furnishing low-cost asynchronous opportunistic communications, variable delays and bandwidth limitations defining a non-TCP/IP (Transmission Control Protocol/Internet Protocol) network. A VDTN assumes asynchronous, bundle-oriented communication, and a store-carry-and-forward...
Vehicular Delay-Tolerant Networks (VDTNs) use vehicles to carry data between network nodes, enabling network connectivity in sparse or partitioned opportunistic networks, where the node density is not high enough to establish end-to-end links. By implementing a store-carry-and-forward paradigm, VDTNs allow delay-tolerant data traffic from a variety of vehicular applications to be routed over time,...
Cross-layer design has been widely used in wireless sensor networks, especially to improve the network lifetime, as can be seen in the literature. In this paper, a cross-layer solution is combined to a transmission advertisement scheme to improve a slotted ALOHA-based wireless sensor network throughput and lifetime. This medium access method scheme has been chosen because it does not add protocol...
Vehicular Delay-Tolerant Networks (VDTNs) are a disruptive network architecture based on delay-tolerant network paradigm, gathering contributions from opportunistic and cooperative networks, and optical burst switching paradigm. VDTNs assume out-of-band signaling and handle non-real time applications with a low cost network infrastructure. In VDTNs, vehicles are opportunistically exploited to carry...
Vehicular Delay-Tolerant Networks (VDTNs) aim to provide non-real time services and applications, such as electronic mail or file transfer, in environments with sparse and intermittent connectivity, variable delays, or where an end-to-end connection may not exist. Gathering contributions from opportunistic and cooperative networks, VDTN tries to generalize the delay-tolerant networks concept and apply...
This paper proposes a probabilistic approach for planning a WLAN. A measurement technique was used to collect data from a real WLAN network. The data collected were power and quality of service (QoS) metrics like, delay, jitter, packet loss, throughput and PMOS. They were analyzed through deductive statistical method. Finally, to optimize the QoS parameters to find the best distance from the AP to...
The spread use of wireless sensor networks (WSNs) in a variety of fields, ranging from the military to environmental protection, has drawn the attention of researchers to this type of networks. Despite their use in interesting applications, such as healthcare and surveillance, many shortcomings derived from their small size and constrained batteries limit their use, calling for solutions to enhance...
Vehicular Delay-Tolerant Networking (VDTN) is a disruptive network architecture based on the concept of delay tolerant networks (DTNs). VDTNs handle non-real time applications using vehicles to carry bundles, relaying them only when a proper contact opportunity occurs. Therefore, the network performance is directly affected by the storage capacity and message retrieving of intermediate nodes. This...
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