Tag Archive: 'opnet'

Multi-devices composition and maintenance mechanism in mobile social network

In mobile social network, it is a critical challenge to select an optimal set of devices to supply high quality service constantly under dynamic network topology and the limit of device capacity in mobile ad-hoc network (MANET). In this paper, a multi-devices composition and maintenance problem is proposed with ubiquitous service model and network model. […]

MD2-NFV: The case for multi-domain distributed network functions virtualization

Motivated by the vision of Network Functions Virtualisation (NFV) spanning different administrativedomains, this position paper makes the case for multi-domain, distributed NFV (MD2-NFV). To this end, we present MD2-NFV as a natural evolution of the NFV paradigm to deliver a distributed deployment of Virtualized Network Functions (VNFs) as a service. By means of three motivating use case […]

Designing a passive star optical network for the India-based Neutrino Observatory

The India-based Neutrino Observatory (INO) uses an iron calorimeter (ICAL) as the neutrino detector. The ICAL consist of 28, 800 resistive plate chambers (RPCs) that generate event data at ~ 650 kbps, for an aggregate of 18 Gbps at the backend. Implementation of a triggerless detection scheme will increase this by a factor of 20. We describe […]

On Availability-Performability Tradeoff in Wireless Mesh Networks

It is understood from past decade of research that a wireless multi-hop network can achieve maximum network throughput only when its nodes operate at a minimum common transmission power level that ensures network connectivity (availability). This point of optimality where maximum availability and throughput is guaranteed in an interference-optimal network has been the basis of numerous design […]

Social-Aware Stateless Routingin Pocket Switched Networks

Existing social-aware routing protocols for packet switched networks make use of the information about the social structure of the network deduced by state information of nodes (e.g., history of past encounters) to optimize routing. Although these approaches are shown to have superior performance to social-oblivious, stateless routing protocols (BinarySW, Epidemic), the improvement comes at the cost of […]

BRACER: A Distributed Broadcast Protocol in Multi-Hop Cognitive Radio Ad Hoc Networks with Collision Avoidance

Broadcast is an important operation in wireless ad hoc networks where control information is usually propagated as broadcasts for the realization of most networking protocols. In traditional ad hoc networks, since the spectrum availability is uniform, broadcasts are delivered via a common channel which can be heard by all users in a network. However, in […]

Cellular software defined networking: a framework

Today???s mobile customers desire to remain connected anywhere, at any time, and using any device. This phenomenon has encouraged mobile network operators to build complex network architectures by incorporating new features and extensions, which are harder to manage and operate. In this article we propose a novel and simplified architecture for mobile networks. The proposed […]

Overarching Control of Flexi Grid Optical Networks: Interworking of GMPLS and OpenFlow Domains

Optical transport networks provide transport, multiplexing, routing, management, supervision, and survivability of optical channels. Within a flexible dense wavelength division multiplexing grid, the optical spectrum can be allocated in multiples of a width granularity, depending on the client signal rate and modulation format. A control plane (CP) can be used for efficient and dynamic provisioning […]

Mobility-aware QoS assurance in software-defined radio access networks: An analytical study

Software-defined networking (SDN) has gained a tremendous attention in the recent years, both in academia and industry. This revolutionary networking paradigm is an attempt to bring the advances in computer science and software engineering into the information and communications technology (ICT) domain. The aim of these efforts is to pave the way for completely programmable […]

Analytical model of multihop IEEE 802.15.4 for lossy medium

Wireless sensor networks (WSN) are used in many fields such as industrial control, building automation, environmental monitoring, etc. IEEE 802.15.4 standard defines the features of MAC layer and physical layer for WSN. Many analytical models studied the performance of the multihop IEEE 802.15.4 networks under the assumption of ideal wireless channel, and they did not […]