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Bandwidth is one of the characteristics that is used to measure network performance. In this paper, we present a Unicast Bandwidth Efficiency Routing Algorithm (UBERA) for mobile devices that are streaming video contents from a video server. The algorithm can adapt to different number of mobile devices with different level of mobility and different location. Routing decisions are based on the availability...
The limited capacity of batteries of nodes imposes a constraint on ad hoc networks. Thus, energy efficiency is critical to prolong the network lifetime. Network traffic should be routed such that the energy consumption is minimized. In this paper, we discuss the energy-efficient multicast problem in ad hoc networks with the respect of delay. Multicast routing deals with finding a multicast tree, which...
A challenging issue in data collection in duty-cycled wireless sensor networks (DC-WSNs) is the trade-off between lifetime and latency. Indeed, duty-cycling has long been a critical mechanism for energy conservation in WSNs where the sensor nodes switch between active and dormant states. Moreover, this mechanism involves strong sleep latencies leading to severe end-to-end delay degradation. In this...
Wireless sensor network is a collection of a group of sensors connected to monitor an area of interest. Installation flexibility, mobility, reduced cost and scalability have given popularity to wireless sensor networks. Opportunistic routing is a routing protocol that takes the advantage of broadcasting nature of wireless sensor network for multi-hop communication. Considering the importance of communication...
Several localization techniques have been proposed to identify the exact location of sensor nodes. Localization is important for computation of many applications such as routing in wireless sensor network. Energy preservation is a challenge in wireless sensor network and many algorithms have already been proposed. The localized node lifetime is maximized by using energy-efficient routing, use of minimum...
Wireless sensor and actor networks require efficient coordination mechanisms to perform reliable actions in the physical world. In this paper, an energy and delay aware three-level coordination mechanism is proposed for wireless sensor and actor networks using twolevel hierarchical k-hop clustering algorithm. An optimal number of actors are calculated based on the network area and number of sensors...
This paper addresses the problem of search with local information in combined social and communication networks. Social networks are modeled with short-range and long-range connections representing small-world and scale-free network characteristics. By distinguishing the delay and success probability on different social links, the end-to-end delay distribution and success probability are derived as...
There have been several geographic routing protocols proposed for disseminating data in Wireless Sensor Networks. In these protocols, routing is based on the location of neighboring nodes and the selection of the next hop is done based on a direction based or a location based strategy. In this paper, a novel routing protocol that makes use of this direction based strategy to disseminate data in the...
Wimax is an broadband wireless technology based on IEEE 802.16. It is very helpful and cheaper than other possible solutions. It is purely based on the 4G technology for the upcoming generation. In wireless technology the major problem is speed, Quality of Service, data rates in order to overcome that they going for some valuable technology. In this paper we consider WIMAX and WLAN for controlling...
Service discovery is an integral part in establishing an independent and self-organizing mobile ad-hoc network(MANET). In this paper a new distributed semantic service discovery scheme is proposed for MANET consisting of various mobile terminals. The proposed scheme based on the proactive routing protocol, Destination-Sequenced Distance Vector (DSDV), maintains the information on the network in the...
Rapid technological advances and innovations in the area of autonomous systems push the researchers towards autonomous networked systems with emphasis on Wireless Sensor Networks (WSNs). In WSN event-driven applications, it is critical to report the detected events in the area, resulting in sudden bursts of traffic due to occurrence of spatially-correlated or multiple events, causing loss of data...
Routing Optimization in mobile ad hoc networks along with secured transmission is an ever-demanding task. Mobile ad hoc networks are highly dynamic topology natured and hence several routing protocols meet the challenge of link quality, delay and energy conscious routing. This paper proposes a secured link quality, delay and energy conscious routing approach based on ant colony optimization. Based...
Public sensing is an application in which sensory systems embedded in smart devices, vehicles, residential and public spaces form a collective cloud of data sources from which multi-owned access points realize end-users' service requests. This conception can be further extended under the umbrella of integrated RFID-Sensor Networks (RSNs) to include RFID systems. Such a configuration is heterogeneous...
Routing in Wireless Mesh Network (WMN) is challenging because of unpredictable variations of wireless environments. Traditional mechanisms have been proved that the routing performance would get deteriorated and ideal metrics must be explored. Cross-layer based approaches for routing optimization have been paid more attention in the recent. Based on information obtaining from wireless channel conditions...
Routing schemes in Delay Tolerant Networks depend on the intermediate nodes to carry messages till the forwarding of the messages to other nodes or delivery of the messages to their destinations. Thus, efficient and faster spreading of messages is essential to reduce the delay of sending a message from source to destination. In this work, we aim to design a new agent aided routing scheme in Delay...
Network coding (NC) has been shown to improve the throughput of multi-hop wireless networks (MWN). Prior work on performance modeling of NC mainly addresses the maximization of throughput. However, these works fail to capture the complete picture since there may be paths in the network for which end-to-end packet delay is prohibitively high. In this paper, we address the problem of delay minimization...
A proposal to use flow switching over a national network was studied in this paper to investigate its feasibility against the other solutions of switching. National Science Foundation Network (NSFNET) has been considered here and supposed to be optically switched in its core. This network has been analyzed against different types of traffics. All the switches are assumed to be OpenFlow switches to...
Nodes in Mobile Adhoc Network (MANET) are highly mobile. As a result, network topology and neighbouring nodes of each node vary abruptly which affects the communication. Communication also fails when a node intrude from one network to another. Communication goes well until every node is within its range, else transmission fails. Therefore it is necessary to build an efficient routing to solve this...
The support of delay-sensitive applications like VoIP, video conferencing, video streaming, etc. on scheduled mesh networks requires careful configuration of routing and scheduling. We formulate a delay-optimal joint routing and scheduling optimization problem that minimizes the maximum average delay perceived by any flow under the physical interference model. Due to the non-convex nature of this...
In this paper, we propose two adaptive algorithms to control Destination Advertisement Option (DAO) packet emissions in RPL non-storing mode: a centralized, or controlled by the DAG root, and a distributed. We propose new mechanisms to derive the most appropriate value for the DelayDAO Timer, a timer that determines how long a node should wait before transmitting its destination advertisement packet...
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