In this letter, we propose a mathematical model for the controller placement problem in SoftwareDefined Networks (SDN). More precisely, given a set of switches that must be managed by the controller(s), the model simultaneously determines the optimal number, location, and type of controller(s) as well as the interconnections between all the network elements. The goal of the model is to…
Tags: OMNeT++ AD Hoc
Video streaming over software defined networks with server load balancing
Software Defined Networking is a promising Internet architecture to deliver multimedia with end-to-end quality of service (QoS) since it enables optimal dynamic management of network resources and on-demand QoS provisioning by a network operator. We propose a framework for server load-balancing over a single-operator OpenFlow network to improve the quality of service levels of video streaming services. We design a new OpenFlow controller application…
Distributed Blind Calibration in Lossy Sensor Networks via Output Synchronization
A novel distributed algorithm for blind macrocalibration of large sensor networks is introduced. The algorithm is in the form of a system of gradient-type recursions for estimating parameters of local sensor calibration functions. The method does not require any fusion center. The convergence analysis is based on diagonal dominance of the dynamical systems with block…
Dynamic Sequence Number Thresholding protocol for detection of blackhole attack in Wireless Sensor Network
The Wireless Sensor Network (WSN) is a distributed wireless micro-electronic-mechanical system which is deployed in hostile environment, has inherent insecure communication medium and resource constraints. This makes security of Wireless Sensor Network challenging. The blackhole attack is a security threat which manipulates sequence number to degrade the performance of the WSN by increasing packet loss.…
The Uplink of Distributed MIMO: Wireless Network Coding v.s. Coordinated Multipoint
In this paper, we propose an advanced transmission protocol for the next generation wireless access network using wireless network coding (WNC). As an alternative to conventional cooperative multipoint (CoMP) as described in LTE-A, WNC enables access point cooperation, combining the flows using network coding functions, instead of sending multiple separate information flows across the backhaul…
Robust Fluid Processing Networks
Fluid models provide a tractable and useful approach in approximating multiclass processing networks. However, they ignore the inherent stochasticity in arrival and service processes. To address this shortcoming, we develop a robust fluid approach to the control of processing networks. We provide insights into the mathematical structure, modeling power, tractability, and performance of the resulting…
Reliability and Survivability Analysis of Artificial Cobweb Network Model Used in Low-voltage Power-line Communication System
In order to verify the feasibility of the artificial cobweb model used in low-voltage power line communication (LVPLC) routing to improve the reliability of LVPLC, the all- terminal reliability of the artificial cobweb model has been calculated based on the factorization method in this paper. Specifically,Analysis shows that the proposed artificial cobweb shows much better…
VANET-cloud: a generic cloud computing model for vehicular Ad Hoc networks
Cloud computing is a network access model that aims to transparently and ubiquitously share a large number of computing resources. These are leased by a service provider to digital customers, usually through the Internet. Due to the increasing number of traffic accidents and dissatisfaction of road users in vehicular networks, the major focus of current…
A programmable and virtualized network & IT infrastructure for the internet of things: How can NFV & SDN help for facing the upcoming challenges
The Internet of Things (IoT) revolution has major impacts on the network & Information Technology (IT) infrastructure. As IT in the past decade, network virtualization is simultaneously on its way with for instance Network Functions Virtualization (NFV) and Software-Defined Networking (SDN). NFV and SDN are approaches enhancing the infrastructure agility thus facilitating the design, delivery…
SDN orchestration of OpenFlow and GMPLS flexi-grid networks with a stateful hierarchical PCE [invited]
New and emerging use cases, such as the interconnection of geographically remote data centers, are drawing attention to the need for provisioning end-to-end connectivity services spanning multiple and heterogeneous network domains. This heterogeneity is due not only to the data transmission and switching technology (the so-called data plane) but also to the deployed control plane,…