The partial overlay of intelligent frequency diversity spread spectrum (FDSS) system on a microwave point to point link is studied. The downlink capacity for the FDSS system is then calculated using a model of 24 cells, and the impact of the FDSS system on the microwave link is investigated. The performance of the microwave point to point link and FDSS users is studied. Results show that the ov...

In this paper we introduce a biobjective ant colony algorithm for constructing low cost overlay routing networks. The ant colony algorithm is distributed and adaptive in finding shortest paths from source to destination nodes while also constructing a low cost overlay routing network. Additionally, we define a cost model for overlay network construction that includes network traffic demands. Th...

In this paper, we discuss the “free-riding”traffic problem in routing overlay networks, which is mainly caused by policy mis-match between the overlay routing and the underlay IP routing. We first define the free-riding problem in routing overlay network, and construct mathematical models for the amount of the free-riding traffic. We next present the numerical examples on the effectiveness of t...

In this paper we report on the design and implementation of a Denial of Service protection overlay, and draw lessons for autonomous services. Our approach is novel in that each node is only aware of a subset of the other nodes within the overlay; the routing topology of the overlay is hidden from internal and external nodes and the overlay uses a distributed monitoring and trust system to detec...

In this paper, we first describe the concept of data overlay, which is a mechanism to implement arbitrary data structure on top of any structured P2P DHT. With this abstraction, we developed a highly scalable, efficient and robust infrastructure, called SOMO, to perform resource management for P2P DHT. It does so by gathering and disseminating system metadata in O(logN) time with a selforganizi...

Overlay networks present an interesting challenge for faulttolerant computing. Many overlay networks operate in dynamic environments (e.g. the Internet), where faults are frequent and widespread, and the number of processes in a system may be quite large. Recently, self-stabilizing overlay networks have been presented as a method for managing this complexity. Self-stabilizing overlay networks p...

Overlay networks have become an enabler for innovation in today’s Internet through cost-efficient and flexible deployment of novel services. The self-organization and scalability properties that peer-to-peer-based overlay networks provide have created real-world large-scale systems like Kad, or Amazon’s Dynamo. Building upon the OMNeT++ simulation environment, the OverSim framework provides wid...

The proliferation of connected electronic devices, along with their possible states, rises new challenges for data maintenance in terms of efficiency, scalability and security. In the context of data replication at large, weak consistency has been adopted as a standard in uniformly trusted systems. Recently, a distributed framework has been proposed to handle untrusted systems, by adding access...

Overlay multicast can effectively use the Internet as a lower level infrastructure to provide services to members. Overlay multicast is proposed as an alternative approach for providing multicast services in the Internet. In the overlay multicast protocols, each multicast member is responsible for forwarding the multicast packets. Thus, network failure can occur by leaving or joining of nodes. ...

Overlay networks, such as P2P, Grid, and CDN, have been widely deployed over physical IP networks. Since simultaneous overlay networks compete for network resources, their selfish behaviors to improve their application-oriented QoS disrupt each other. To enhance the collective performance and improve the QoS at the application level, we consider so-called the overlay network symbiosis where ove...