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Delay/Disruption Tolerant Network (DTN) differs from the conventional networks in that it has no continuous or contemporaneous connections among wireless nodes. Its inherent characteristic of intermittent connections makes existing routing solutions hardly to be applied directly. Epidemic routing using random linear network coding has been studied and proved as an efficient way for light data delivery...
This paper presents a novel energy-efficient pulse switching protocol for ultra light-weight wireless network applications. The key idea is to abstract a single pulse, as opposed to multi-bit packets, as the information exchange mechanism. Pulse switching is shown to be sufficient for event sensing applications with binary sensing. Event sensing with conventional packet transport can be prohibitively...
Protocol Independent Multicast - sparse mode (PIM-SM) builds a shared distribution tree centred at a Rendezvous Point (RP) and then it builds source specific trees. The RP selection problem is very trivial in PIM-SM because it not only affects the structure of the multicast tree but also affects the performance of multicast. In this paper, we propose an Adaptive Tabu Search based algorithm for RP...
In this paper, we describe an improved model Kad-D based on Kademlia[1]. The networks based on Kademlia are not stabilized at all times, for all kinds of nodes in the networks connected to the networks can be cut out of networks frequently. And in mobile environments that are made of intermittent connections and unsettled networks bandwidths, the Kademlia has good performance but the hops, delay and...
The freedom and flexibility of wireless Mobile Adhoc Networks (MANETs) that make them extremely desirable for many military, emergency, and sensor network applications also present challenges for multiple layers in the network stack. Max-weight scheduling, also known as backpressure routing, is a cross-layer control algorithm that is well-known to be throughput optimal since it provides queue stability...
Wireless sensor networks (WSNs), now-a-days, are deployed in environmental data collection as well as in critical event monitoring. Successful data collection requires reliability while reliable event detection necessitates timeliness. Simultaneous data gathering and event monitoring is not well studied in literature. In this paper, we propose a system model that works on homogeneous data gathering...
Mobile ad hoc network especially follows multihopping mechanism for routing to make a path from source to destination. If we have a sound and solid routing path that would be efficient, reliable and adaptable to the different scenarios of network too by following the next hop mechanism and also should be the farthest node with in the cluster then we could achieve better performance by the network...
The technological advancement in the area of wireless networking is ultimately envisioned to reach complete and seamless ubiquity, where virtually every point on earth will need to be covered by Internet access. Low connectivity environments have emerged as a major challenge, and accordingly Opportunistic Networks arose as a promising solution. While these networks do not assume the existence of a...
In delay tolerant networks (DTNs), the lack of continuous connectivity, network partitioning, and long delays make design of network protocols very challenging. Previous DTN research mainly focuses on routing and information propagation. However, with large number of wireless devices' participation, how to maintain efficient and dynamic topology of the DTN becomes crucial. In this paper, we study...
In this paper, we propose a new metric that is applicable both to routing and rate adaptation in multi-rate wireless mesh networks. Unlike many previous efforts, our metric is comprehensive; it considers several factors that affect end-to-end performance such as the effect of the relative positions of the links on a path when choosing the rates of operation and the importance of avoiding congested...
In wireless sensor networks (WSNs), the energy and function of sensor nodes are limited. Congestion occurs frequently in many to one and multi-hop transferring nodes. It can cause packets dropout, low energy efficiency, and long delay. The network congestion control is a key to improve the QoS of network. Most studies were carried out at the transport layer in congestion detection and rate adjustment...
Vehicular ad hoc networks (VANETs) rely on multi-hop communication in order to disseminate information to locations beyond the transmission range. In this paper, the use of handshaking mechanism is evaluated against instant transmission for safety message routing in VANETs for the first time. It is argued that due to the small size of VANET safety message (mean payload size of 100 bytes), handshaking...
For sensor networks, the extension of operating time by controlling power consumption is an important research subject. In a receiver-driven communication protocol, a receiver node transmits its ID to the sender node periodically, and in response the sender node sends an acknowledgment. The average power consumption of the network can be controlled, but a part of the network shuts down when the battery...
Multicast is one of the key technologies for supporting the multimedia networks services. Based on the concept of the distributed algorithm theory, this paper discusses a multimedia communication model and its corresponding data structure, and also simulates RPM algorithm by using forwarding table, the time line and data packet cache to discuss the algorithm QoS solution.
This paper presents a novel energy-efficient pulse switching protocol for ultra light-weight wireless network applications. The key idea is to abstract a single pulse, as opposed to multi-bit packets, as the information exchange mechanism. Pulse switching is shown to be sufficient for event and target tracking applications with binary sensing. Target tracking with conventional packet transport can...
Ubiquitous communication networks is a keystone for New Generation Network (NWGN). Mobile Wireless Communication Networks (MWSN) is a viable solution to accomplish the requirements of NWGN. Due to mobility of sensor nodes, the data reliability and end-to-end delay with energy efficiency in the network is an enormous concern. Various real-time and delay sensitive applications enforced to use both environments...
A handful of proposals address the problem of bootstrapping a large DHT network from scratch, but they all forgo the standard DHT join protocols in favor of their own distributed algorithms that build routing tables directly. Motivating their algorithms, the proposals make a perfunctory claim that the standard join protocols are not designed to handle the huge number of concurrent join requests involved...
A tunnel-based solution is presented in this paper to provide a resilient Internet access in face of a malicious act of denial of Internet access by higher-tier Internet service providers (ISPs). The proposed solution describes the different types of tunneling protocols that can be used, and the needed configurations to establish the tunnels. The validity of the proposed solution is demonstrated by...
This paper presented a fast fasten control algorithm (2FCA) in wireless sensor networks for information processing and transmitting. Using anycast technology, 2FCA can fast fasten broken routing path, which will decrease failure delay and increase packets' success rate. In the algorithm, it restricts participant nodes to save scarce energy and bandwidth resource, and then prolongs network's lifetime...
The key problem in P2P network is effectively to locate resources. Chord has been widely used as a routing protocol in structured P2P networks, but there is a lot of redundant information in the node's finger table. By analyzing Chord protocol, an improved Chord algorithm is proposed in this paper. Analysis on theory and simulation results show that the improved finger tables reduce redundancy and...
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