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The User-Generated Contents (UGC) and User-Generated Services (UGS) concepts allow end-users to create their own contents and services as well as to share and to manage the lifecycle of these services. Web Services paradigm has been widely used for services composition in Internet to create Web applications that are flexible and rapidly deployable. In Telecom, on the other hand, the IMS (IP Multimedia...
The Web Services composition paradigm has been widely used in Information Technology (IT) and Internet environments to create Web applications that both flexible and rapidly deployable. Web Services are a key way to realize Service-Oriented Architectures (SOA). In Telecom, on the other hand, the IMS (IP Multimedia Subsystem) architecture enables valued-added services composition for IP-based networks...
The envisioned airborne networks (ANs) will be all IP-based to provide seamless connectivity and reachability among diverse aircrafts and unmanned air vehicles. Due to the dynamic nature and bandwidth/capacity limited channel condition of airborne networks, providing dynamic yet efficient network service always faces many challenges. In this paper, we summarize our efforts on design and implementation...
While there have been tremendous efforts to develop the architecture and protocols to support advanced Internet-based services over 3G and 4G networks, IMS is far from being deployed in a wide scale manner. Effort to create an operator controlled signaling infrastructure using IP-based protocols has resulted in a large number of functional components and interactions between those components. Thus,...
There have been many attempts to unify the control and management of circuit and packet switched networks, but none have taken hold. In this paper we propose a simple way to unify both types of network using OpenFlow. The basic idea is that a simple flow abstraction fits well with both types of network, provides a common paradigm for control, and makes it easy to insert new functionality into the...
Multi-media based applications have increased immensely in the last few years. The need to have better video quality, higher recording and playback time, more video channels and faster time to market (TTM) requires DFT solutions that use core-based testing to allow concurrent IP and SOC development, scalable to support multiple technologies and eases the development of timing constraints. This paper...
OpenFlow is proposed as an architectural platform and a unified control plane for packet and circuit networks, with the main goal of simplifying network control and management while fostering innovative change in them.
A Directory Harvest Attack or DHA is a technique used by spammers in an attempt to determine the valid e-mail addresses associated with an e-mail server so that they can be added to a spam database. Directory Harvest Attackers send the blank mail to the server to collect the valid user-id. They do this by observing the server's reply. Traditionally attackers use single IP address to send mails. Recently...
The key contribution of the work herein described is an integrated network service architecture for airborne networks (ANs), wherein a set of robust and auto-configurable network service mechanisms are designed to handle network dynamics and bandwidth constraints in AN environments. Instead of covering all possible network services, address configuration and name resolution are addressed in this paper...
Advances to IMS (A-IMS) architecture extends the existing IMS/MMD architecture currently being defined in 3GPP/3GPP2 respectively so that it can support both SIP and non-SIP-based services. We describe the key strength of A-IMS architecture, compare the benefits over MMD architecture, and then describe an enhanced MMD experimental testbed to demonstrate many of the A-IMS features. We highlight many...
The study of protocol behavior and traffic characteristics in a simulated environment is commonly supported by ad-hoc or general purpose simulators (e.g., Opnet, NS-2). But as the complexity of the network to be simulated grows, event-driven simulation could become the bottleneck of any performance analysis. Here, we propose an analytical technique for a real system performance evaluation of the proxy(P)-CSCF...
Seamless mobility support in a heterogeneous roaming environment poses several challenging issues in the choice of network architecture design and mobility protocol. Several standards organizations are designing next generation wireless network architectures with a suite of new network elements and protocols that provide service continuity for intra-and inter-provider roaming. However, each of these...
We present an integrated architecture for seamless soft handoff in mobile ad hoc networks, where various managers residing on multiple layers are proposed to tackle handoff issues in a cross-layer and cooperative manner. At the link adaptation layer, the virtual interface provides link transparency to the upper layers and session management is handled at the interface manager. At the network layer,...
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