With the exploration of the ocean, underwater acoustic communication has attracted more and more attention in recent years. The underwater acoustic channel is considered to be one of the most complicated channels because it suffers from more serious multipath effect, fewer available bandwidths and quite complex noise. Since the signals experience a serious distortion after being transmitted…
Tags: IEEE OMNeT++ Projects
Modulation rate study in spin torque oscillator based wireless communication system
Wireless transmission requires a circuitry to generate GHz range signal. Spin transfer torque devices are one of the promising candidates for generating stable signal in the GHz range through collective precession of the local spins in one of the ferromagnetic layer, known as free layer. Another ferromagnetic layer, fixed layer, acts as a medium to…
SBVLC: Secure Barcode-based Visible Light Communication for Smartphones
2D barcodes have enjoyed a significant penetration rate in mobile applications. This is largely due to the extremely low barrier to adoption – almost every camera-enabled smartphone can scan 2D barcodes. As an alternative to NFC technology, 2D barcodes have been increasingly used for security-sensitive mobile applications including mobile payments and personal identification. However, the…
Rain fade mitigation using linear prediction technique in wireless communication
Proposed work shows the rain fade mitigation technique in wireless communication using linear prediction. Two year signal data from IPSTAR satellite at 20.2 GHz is used in this work. Proposed work can be used on different frequencies by using frequency scaling. Experimental signal is used to analyze original variations of the atmosphere. Delhi earth station data provided…
EXR: Greening Data Center Network with Software Defined Exclusive Routing
The explosive expansion of data center sizes aggravates the power consumption and carbon footprint, which has restricted the sustainable growth of cloud services and seriously troubled data center operators. In recent years, plenty of advanced data center network architectures have been proposed. They usually employ richly-connected topologies and multi-path routing to provide high networkcapacity. Unfortunately, they also undergo…
Integrating Software Defined Networks within a Cloud Federation
Cloud computing has generally involved the use of specialist data centres to support computation and data storage at a central site (or a limited number of sites). The motivation for this has come from the need to provide economies of scale (and subsequent reduction in cost) for supporting large scale computation for multiple user applications…
An efficient flow classification algorithm in Software-Defined Networking
In Software-Defined Network environment, operator can see the global view of network. So it can be manage flows with network-wide view, but legacy flow classification method cannot satisfy the integrated tables of all switches because of out of memory and long compilation time. So I proposed the architecture that can control network-wide flow classification to satisfy one’s policy like Quality-of-Service. The…
Toward terabit autonomic optical networks based on a software defined adaptive/cognitive approach [invited]
Terabit elastic optical networking (EON) is foreseen as a viable solution to extend the lifetime of anetwork exploiting the available bandwidth in previously deployed optical fibers. EON is based on bandwidth-variable transponders capable of supporting multiple bit rates and/ or modulation formats according to traffic requirements and node architectures that route arbitrary channel band-widths. Thus, EON increases the…
Exploring the effects of monitoring and flow-rule timeout durations on load balancing in software defined networks
As more complex and distributed applications come into play in today’s Internet architecture, the need to have the adequate network architecture to support them with greater speed at lower costs has gained importance. Evolution in the nature of the applications have started to put significant stress on the networks and data centers which have to accommodate the demands of…
Performance Evaluation of Software Defined and Cognitive Wireless Network Based Disaster Resilient System
Through the information network recovery experience on the East Japan Great Earthquake on March 11, 2011, we learned that the combination of various existing wireless network technologies such as satellite IP network, 3G/LTE, Wi-Fi was useful in term of network connectivity. In this paper, by integrating those wireless networks into a cognitive wireless network, user can use this cognitivenetwork as an access network to Internet by selecting the…