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Nowadays Service Providers (ISP) are more interested in deploying new traffic engineering (TE) methods offered by Multiprotocol Label Switching Traffic Engineering (MPLS-TE) path-oriented forwarding technology. The attractiveness of this technology is encouraged by the possibility to deploy better forwarding performance, constrained based routing restricted by the network resources and Quality of...
Low Earth Orbit (LEO) satellite networks are expected to provide a variety of multimedia applications. In order to satisfy different QoS requirements and optimize utilization of network resources, a novel traffic classification routing algorithm (TCR) is proposed. The key technique of TCR is investigating the traffic classification link-cost metrics (TCM) for different traffic classes, which selects...
The Hierarchical Optimized Link State Routing (HOLSR) protocol was designed to improve scalability of heterogeneous Mobile Ad-Hoc Networks (MANETs). HOLSR is derived from the OLSR protocol and implements Multipoint Relay (MPR) nodes as a flooding mechanism for distributing control information. Unlike OLSR, nodes are organized in clusters and implement Hierarchical Topology Control (HTC) messages for...
ZigBee is the emerging industrial standard for wireless sensor networks. Preemptive Distributed Address Assignment (PDAA) Mechanism improves ZigBee address assignment algorithm, and PDAA Mechanism presents an autorouting protocol which does not require any routing tables to send the packets to the destination. It can be used in any device in ZigBee, such as router and end device. However, the autorouting...
Vehicular networks are highly mobile wireless networks that can provide wide variety of services and applications such as public safety communications, crash avoidance, multimedia and Internet access in highways. Designing routing algorithm in vehicular network is a challenging task due to rapidly changing topology and high speed mobility of vehicles. One of the critical issues of vehicular network...
A Mobile Ad Hoc Network (MANET) is a dynamic wireless network that can be formed without the need for any pre-existing infrastructure in which each node can act as a router. Due to bandwidth constraint and dynamic topology of mobile ad hoc networks, multipath supported routing is a very important research issue. This paper proposes a Ad hoc On-demand Distance Vector Multipath Routing Protocol with...
With new optical transport systems able to provide sub-wavelength granularity, the dynamic characteristics of the network are expected to strongly increase. Furthermore, such properties are highly related to the underlying physical network topology, which in turn require from the control plane important features such as scalability, dynamism and automatism. In this paper we analyze the properties...
The paper presents the comparative study and analysis of buffering in Goback2 network. The performance at the destination node by applying different buffering capacities at the routers is demonstrated. The results using NS2 simulator are produced. It can be concluded that the selection of appropriate type of buffering helps in controlling the congestion and the packet drops at the link node.
MANETs are unplanned, self-organizing networks composed of mobile nodes that utilize mesh networking principles for inter-connectivity. They do not have a fixed infra-structure which makes them easy to build over an area. Mobile Ad hoc networks (MANETs) have several advantages compared to traditional wireless networks. These include ease of deployment, speed of deployment and decreased dependency...
Combining LEO satellite's advantage on transmitting real-time information with GEO satellite's big computing ability, this paper proposes a Snap-based Autonomous Routing Algorithm for GEO_LEO satellite networks. The algorithm utilizes the connectivity rules of inter satellite link to partition network' topology and compute the routing table. GEO satellites can recount routing table for failure region...
In this paper, we study the performance of the Greedy Perimeter Stateless Routing (GPSR) [1] and the Greedy Routing for Maximum Lifetime (GRMax)[2] which is our proposal, in wireless sensor networks in random topology and grid topology wireless sensor network. We decide to compare the performance of GPSR and GRMax in different topology of networks using the same simulation environment. Evaluation...
In this paper, we study the problem of data acquisition in wireless sensor networks (WSNs). A recently revitalized technique called compressive sensing (CS) has presented a new method to capture sparse signals at a rate below Nyquist. There are drawbacks to directly applying the existing CS algorithm to WSNs, which are mainly due to the fact that CS requires a large number of inter-communications...
Recently many Wireless Sensor Network (WSN)-based agriculture monitoring systems have been implemented mostly for developed countries. WSN in these monitoring systems uses tree topology and multi-hop dynamic flooding routing protocol that are not energy efficient and has a single point of failure. Though some protocols use zone-based routing they consider that a large number of sensors are deployed...
Transparent optical networks based on wavelength division multiplexing (WDM) can exploit the huge capacity of optical fibers by dividing it among different wavelengths. Physical-layer attacks, such as high-powered jamming, can seriously degrade network performance and must be dealt with efficiently. Hence route lightpaths in such a way as to minimize the potential damage caused by various physical-layer...
Content sharing, dissemination and collaboration in open environments require the ability to send and combine data packets across network even in the absence of an end-to-end connected path [1]. User mobility plays a fundamental role in selection of intermediate relays for multi-hop communication [2]. Current schemes do not take into account the effect of power law distribution of inter-contact times,...
This paper addresses the problem of optimal gateways selection and route selection to Internet in backbone wireless mesh networks (WMNs) where each mesh router (MR) is equipped with multiple radio interfaces and a subset of nodes serve as gateways to Internet. Several schemes have been proposed to route packets in WMNs or to select appropriate gateways to connect clients to Internet. However, most...
Geographic routing is one of the most widely used routing strategies in large-scale wireless sensor networks (WSN). With location-based routing, small, cheap and resource constrained nodes can perform the routing function without the need of complex computations and large amount of memory space. In the traditional approach, nodes advertise their availability to update the routing table. We eliminate...
The adhoc network comprises of nodes with a wireless radio interface is multihop network environment in which messages are transmitted from one to another node via intermediate nodes within the range. To find an effective and an efficient routing protocol, which is used to transmit information from source to destination across whole network topology, is a major issue in networking research. The broadcasting...
With the popularization of Internet and formation of wireless technologies provide significant impact on Internet and Communication Technologies. These technologies have support of one of famous technique known as Adhoc Network. Adhoc Networks are assortment of mobile nodes connected by wireless links and also receiving attention in the scientific community. In adhoc networks, routes may be disconnected...
Mobile Ad hoc network consists of a collection of mobile nodes capable of forming instantaneous network with dynamic topology. Each node simultaneously acts as both router and host. Nodes can leave or join the network freely. Destination Sequence Distance Vector (DSDV) is a modification of the conventional Bellman-Ford routing algorithm for ad hoc networks. Dynamic topology of ad hoc networks makes...
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