We must admit that there information technology is the most vital part of most of the business operational environment where the companies performs immense information transaction from workstations to workstations, from servers to servers, and from LAN to WAN. So an optimized, planned and secure Information and communication system should be in place for an optimized business operation. Here we...

This paper proposes the Dynamic User-Oriented QoS Framework (DUQF), which provides the effective adaptation control schemes for dynamic QoS specification and mapping based on the combination of DiffServ and IntServ network architecture. A DUQF network consists of a DiffServ WAN and lots of attached IntServ LANs that connect to each other via a RSVP-aware router and a differentiation edge router...

This paper presents an H.323 standard compliant virtual video conferencing system. The proposed system not only serves as a multipoint control unit (MCU) for multipoint connection but also provides a gateway function between the H.323 LAN (localarea network) and the H.324 WAN (wide-area network) users. The proposed virtual video conferencing system provides userfriendly object compositing and m...

Unlike traditional data traffic, real time multimedia traffic requires synchronization. Temporal relationships among media must be maintained. Yet delay jitter and the absence of a global clock may disrupt these temporal relationships. This paper introduces new group synchronization protocols for real time, multimedia applications, including teleconference, teleorchstration and multimedia on de...

Quality of Services (QoS) is utilized as a mean to provide efficient bandwidth provisioning in enterprises communication networks. Resource allocation and prioritization need to be provided for different types of networking traffic especially for real-time. This measurable service-oriented provisioning can be implemented in many forms. However, the simplest and most scalable approach for Ethern...

In this paper we describe a control and management architecture for an ATM-based Multipoint Videoconferecning (AMV) system. The service specification of the AMV system defines control functions that emulate human interactions, management functions that manage the videoconference and improve the service availability, and a web-based interface for easy control and management of the videoconferenc...

Most clusters so far have used WAN or LAN-based network products for communication due to their market availability. However, they do not always match communication patterns in clusters, thus incurring extra overhead. Based on our investigation for such overhead, we have optimized cluster communication at link layer. Partitioning each message in 16-byte packets, our optimization uses two techni...

The development of many complex simulation applications requires collaborative effort from researchers with different domain knowledge and expertise, possibly at different locations. These simulation systems often require huge computing resources and data sets, which may be geographically distributed. In order to support collaborative model development and to cater for the increasing complexity...

Large amount of data that is often stored in many thousands of files is created as part of today’s geographically distributed scientific computation and collaboration environments. Managing and transferring large volumes of data sets present a significant challenge and are often a bottleneck in the scientific computing community. In this paper, we introduce an architecture to manage data distri...

Today there are new challenges facing network managers of heterogeneous networks. A heterogeneous network may be computing devices manufactured by various companies that are connected and potentially able to communicate with each other. Today, we have new intelligent devices mixed with old dumb devices making up vast communications networks. Network administrators need to communicate with all t...