As an alternative technology to radio-frequency-based communication, visible light communication(VLC) has attracted tremendous interest from both academia and industry. For its medium access control (MAC) protocol, most existing design has focused on the half-duplex mode, which can be inefficient for two-way communications. In this paper, we propose a novel full-duplex MAC protocol for VLC networks. Different from half-duplex…
Tags: OMNeT++ SDN
Ergodic Capacity of SIM-Based DF Relayed Optical Wireless Communication Systems
In this letter, we consider a dual-hop, subcarrier intensity modulation-based relayed optical wirelesscommunication system under the combined influence of atmospheric turbulence and pointing error impairments. The turbulence-induced fading is modeled by independent but not necessarily identically distributed Gamma-Gamma fading statistics with misalignment fading. The relaying protocol followed by the relay is decode and forward. We first,…
Electric field of grounded horizontal line transmitter for through-the-earth communication
An electrode-based through-the-earth (TTE) communication system sends its signal directly through the earth overburden of a mine by driving an AC current into the earth. The resultant current density is detected and communication is established. Given the noise level and the attenuation characteristics of the earth, the receiver sensitivity and transmitter power required for communication can be estimated. In an effort…
Active probing assisted monitoring for software defined networks
Efficient and agile control-plane design is crucial for emerging flexible, on-demand optical networks. Active probing assisted monitoring is proposed and shown to reduce monitoring time by around 75% to achieve rapid monitoring in optical networks.
BaProbSDN: A probabilistic-based QoS routing mechanism for Software Defined Networks
Over the past decade there has been an exponential increase in the Internet traffic especially with the proliferation of cloud computing and other distributed data services. This explosion of data traffic with its dynamically changing traffic patterns and flows might result in degradation of the network performance. In this context, there is a need for an intelligent…
Toward control path high availability for software-defined networks
High Availability (HA) is one of the most critical requirements in real network operation. Provisioning redundancies, enabling failure detections and notifications, supporting a state synchronization, and invoking failure mitigation have been the essential steps to achieve the HA feature. Software-DefinedNetworking (SDN) is an emerging networking paradigm that centralizes the control plane by separating it from the data plane. In this paper,…
Customizable Autonomic Network Management: Integrating Autonomic Network Management and Software-Defined Networking
The increased complexity of emerging and future networks and services requires the use of sophisticated but simplified management and control that will minimize the burden of human presence and manual operation. Autonomic network management (ANM), on the one hand, and software definednetworking (SDN), on the other hand, have appeared with the promise to meet these requirements and enhance the efficiency of the…
Scalable application-aware resource management in software defined networking
SDN architecture based on separation of control and data plane in network devices enables realization of network programmability and application-aware networking. In this paper, we point out that the information of how applications are using network resources is ignored in modern SDN solution and should be recorded in application-aware SDN. We stress the importance of mapping applications tonetwork resources and maintaining such mapping…
Securing software defined networks: taxonomy, requirements, and open issues
The emergence of SDNs promises to dramatically simplify network management and enable innovation through network programmability. Despite all the hype surrounding SDNs, exploiting its full potential is demanding. Security is still the key concern and is an equally striking challenge that reduces the growth of SDNs. Moreover, the deployment of novel entities and the introduction of several architectural components…
Software defined network traffic measurement: Current trends and challenges
Next generation networks such as Software Defined Networks (SDN) must support the integration of new paradigms of service offerings such as virtual cloud computing, big data applications, data centers services, and rich multimedia content. Operators of next generation SDNs are responsible for configuring policies that employ traffic monitoring tools and measurement mechanisms to detect and react to a wide range of network events…