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This paper summarizes the evaluation of a totally-ordered, reliable multicast protocol over a cognitive radio (CR) network. Multicast enables a group of nodes to subscribe to broadcast messages. Reliability ensures that all nodes receive messages correctly, totally-ordered ensures that all nodes receive messages in sequential order. In the proposed architecture, CR nodes employ multicast to exchange...
Large distributed software systems are increasingly common in today geographically distributed IT infrastructures. A key challenge for the software engineering community is how to efficiently and effectively manage such complex systems. Extending software services with autonomic capabilities has been suggested as a possible way to address this challenge. Ideally, self-management capabilities should...
In today's web application paradigm, web services play a vital role as reusable application components. Web services act as bridges to connect different software applications, running on a variety of platforms and/or frameworks. We developed a web based system to integrate the reusable application components and to provide different applications a way to link their data: Automatic Integration of Web...
Group applications like the audioconference require a minimum level of quality of service for the adequate transmission of voice packets and the improvement of the signaling processes for joining, maintaining and leaving multicast groups. Traditionally, SIP servers have dealed with unicast signaling and have also been supported by IP multicast facilities described within the SDP payload information...
This paper analyzes the shortages of traditional Web/CORBA based network management architecture firstly, and then puts forward a new Web/CORBA based architecture for network management with TCP connection, which applies information push technology and notification service to traditional model. It changes the passive state of server and implements network management in an active state. It can push...
IEEE P1900.4 is an emerging standard for optimized radio resource utilization where cognitive radio technologies are used for efficient spectrum utilization. In this paper, we design and implement a cognitive wireless network system based on open documents of IEEE P1900.4, and evaluate its performance using UDP streaming and HTTP download. Our experiments show interesting results that total network...
This paper describes a methodology for building a reliable internet core router that considers the vulnerability of its electronic components to single event upset (SEU). It begins with a set of meaningful system level metrics that can be related to product reliability requirements. A specification is then defined that can be effectively used during the system architecture, silicon and software design...
The Department of Electronic Engineering of Beijing Institute of Technology is integrating emerging interconnect technologies with other high-performance technologies to meet the demanding requirement of future, real-time signal processing applications. For next-generation, scalable, modular and adaptable signal-processing system, a universal, flexible and high-performance signal processing module...
This is an introduction to the proceedings of the MWS 2007 workshop held at EDOC 2007. It first explains the motivation for and background of the workshop. Then, it contains a short description of the keynote, each long and short peer-reviewed paper, and the discussion session "impact of various execution environments on middleware for web services". After the closing statements, MWS 2007...
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