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Due to the bufferless nature of optical burst switched (OBS) networks, contention/congestion in the core network can quickly lead to degradation in overall network performance at moderate to high traffic levels due to heavy burst losses. Several approaches have been explored to address this problem, notably measures that would minimize burstification delays, congestion, blocking at the same time enhancing...
In cellular communication system, a user can communicate with another user only by using the services of base station (BS) as a relay for forwarding the data. D2D communication is a new paradigm in cellular communication system that enables users to directly exchange data with each other without passing data to the BS. However in D2D communication, when two users which are not in vicinity of each...
This paper evaluates the performance of the first-last-exact fit spectrum allocation policy for elastic optical networks. The first-last-exact fit spectrum allocation policy is intended to increase the number of aligned available slots and avoid small contiguous available slots, and hence suppresses the blocking probability. This policy separates the allocation of disjoint and non-disjoint connections...
This paper evaluates the performances of elastic optical networks (EONs) in terms of request blocking probability with and without incorporation of spectrum conversions at intermediate switches. In EONs, dynamically setting up and tearing down of lightpath connections generate spectrum fragmentation problems. The spectrum fragmentation problem occurs when the available spectrum slots are isolated...
In this paper we introduce the SDNRoute system which aims to support routing decisions in Software Defined Networks. Such a system is especially important in the context of the SDN as this concept makes it possible to perform routing in a dynamic and elastic manner. We focus on the SDNRoute architecture and research challenges that must be investigated to develop the system. Additionally, we provide...
The smartphone applications have taken place of the web browser and became the user's primary internet entrance. One application's popularity can be measured by its downloading times, and it is valuable for commercial advertising. Identifying app installation packages from network traffic is one of the most feasible approaches to collect these data. But asymmetric routing, incomplete capture and so...
Network operators need to assess the effects of routing policies and traffic engineering methods in order to guide planning and operational decisions related to peering. We propose a peering analysis framework based on the correlation of inferred AS paths and traffic flow information. We define the data sets needed and a four-step methodology designed to reduce network data dimensionality, determine...
In applications of Wireless Sensor Networks (WSNs), all data packets are directed towards a single base-station (BS) over multi-hop routes. The BS is usually responsible for processing the collected data and interfacing the WSN to remote users. The continuous flow of packets towards the BS enables the adversary to analyze the traffic and uncover the BS position. In this paper, we present a technique...
Optimized energy utilization in Underwater Wireless Sensor Networks (UWSNs) is a challenging task and an active research area. Non-uniform energy consumption in a sensor network creates coverage holes that mean nodes with no transmission energy. These holes degrade the performance and reduce lifetime of UWSNs. In this work, we propose an Optimized Depth Based Routing (ODBR) scheme which ensures uniform...
Power consumption is the most important factor for the consideration of next generation supercomputers. In addition, the requirement of power usages can be even scaled up to more than 300MW (which is nearly equal to the one nuclear power plant) with the conventional networks. On the other hand, hierarchical interconnection networks can be a possible solution to those issues. 3D-TTN is a hierarchical...
The mesh network-on-chip (MNoC) is the most popular inter-processor communication infrastructures used in modern on-chip systems. Although many routing algorithms have been developed for MNoCs but almost all of them give better performance in cost of more complexity (more virtual channels) and hence extra power consumption. In this paper, we propose a partially adaptive routing algorithm for meshes...
Poisson traffic model was usually used in existing investigations for evaluating the performance of routing and spectrum assignment (RSA) algorithms in elastic optical networks (EONs). However, many studies showed that the self-similar traffic could reflect the Internet traffic property more accurately than Poisson traffic. In addition, the performance of RSA could be improved by using the predicted...
Shared backup path protection in MCF networks is studied considering inter-core crosstalk and MIMO-based crosstalk suppression. Results show that inter-core crosstalk seriously affects network throughput and backup path sharing ratio under high traffic load.
In the electrical power system, there is a wide range of communication services and service needs, and the realization of differentiated services of different types is quite necessary. Thus, based on the combination of characters and requirements of electric power communication business, this paper makes an argument for a routing and wavelength assignment algorithm based on prediction and layered...
Wireless sensor network (WSN) consists of sensor nodes to sense environmental or physical data and that will be communicated to sink through one hop or multi hop communication. These sensors are small, with limited processing and computing resources. These sensors can sense, measure, and gather information from the environment and transmit that data to the sink. All nodes in network are trying to...
The recently developed Software-Defined Networking (SDN) provides flexibility, scalability and reduce the cost of hardware for operators and vendors. In this paper, we propose four routing algorithms in SDN to minimize network latency and balance the traffic load of each switch link in a network. The first routing algorithm is the shortest path first (SPF) algorithm. The SPF algorithm can find the...
The controller or the “control plane” is at the heart of software defined networks (SDN). As SDN migrates to wide area networks (WAN), scalability and performance are two important factors that differentiate one controller from another, and they are critical for success of SDN for end-to-end service management. We distinguish control flows from data flows, and introduce a novel dynamic control plane...
A system having an embedded processor which can operate at minimum power with a small memory, where sensor having low data rate, battery, a GPS system and transceiver that operates at low data rate, collectively constitute a wireless device system. The power source in a wireless device system has a fixed value electro motive force (EMF) which is nothing but a battery. The EMF placed to any wireless...
Detectable Opportunistic Forwarding (DOF) is a duplicate free opportunistic forwarding protocol for low duty cycled wireless sensor network. DOF enables senders to obtain the information of all potential forwarders through acknowledgement scheme deliver the data packets to the next hop forwarder. Based on admission control algorithm using link stability the duplicate packets can be removed. The experimental...
Previously, the distributed coding aware routing (DCAR) mechanism was proposed as a network coding aware routing protocol. However, DCAR is inefficient in handling realtime multimedia flows because it prefers nodes with longer queues in determining routes so that network coding opportunities can be increased. We propose a distributed coding-aware routing protocol that can maximize throughput and minimize...
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