We present a method to compute the delay constrained multicast routing tree by employing chaotic neural networks. Experimental result shows that the noisy chaotic neural network (NCNN) provides optimal solution more often compared to the transiently chaotic neural network (TCNN) and the Hopfield neural network (HNN). Furthermore, compared with the bounded shortest multicast algorithm (BSMA), the noisy chaotic neural network is able to find multicast trees with lower cost.

Delay-Constrained Multicast Routing Using the Noisy Chaotic Neural Networks

In this paper, an asynchronous transfer mode (ATM)-based network is applied as the communication backbone between a geographical information system (GIS) and supervisory control and data acquisition (SCADA). Because the ATM network is a true multiservice network that provides broadband services and meets the different quality of service requirements, this technique is increasingly important in a modem communication system. The paper begins with the event generator that brings different messages to the ATM network from various local area networks. A statistical evaluation is then employed to examine the amount of message flow and the quality of service, where the outcome is assessed based on traffic, capacity, and performance of the proposed method. Test results help solidify the effectiveness of the approach for power system communication applications.

Application of ATM-Based Network for an Integrated Distribution SCADA-GIS System

—Multicast routing in communication networks consists of transmitting data from one (or more) sources to multiple destinations, while minimizing the use of network resources and taking into account multiple QoS (quality of service) parameters. In an effort to understand the benefits and drawbacks of existing methods, this state-of-the-art paperaims to provide a tutorial that is easy to follow for readers who are not already familiar with the subject, and make a comprehensive survey and comparisons of different techniques employed in or proposed for routing problem.

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Multicast Routing Problem in Communication Networks: State of the Art

Converged networking is an emerging technology thrust that integrates voice, video, and data traffic on a single network. Converged networking encompasses several aspects, all of which are related to the aggregation of networking activity. Such aspects include, Payload convergence, Protocol convergence, Physical convergence, Device convergence, Application convergence, Technology convergence, etc. In recent years the Internet has developed into a global data network that is highly accepted as a multimedia information platform, which has the potential to develop into an alternative carrier network in the future. Several convergence scenarios have been recently proposed, ranging from integrating communication services and computer application into two separate networks, to building a seamless multimedia network, which converges the Central Office based network and the Internet in a single network, thereby enabling telecommunications operators and service provider's tremendous investment in existing network infrastructure to be fully utilized. This paper offers introduction and review of the networking technologies. The paper presents the existing multiple networks into two infrastructures: an ATM/Frame Relay (Ethernet)- based corporate network with integrated voice, video, and data traffic and an Internet-based network for secure intranet, extranet and remote access. This work is aimed at summarizing the internetworking basics and technologies which are essential for the emerging converged networking systems. The specific areas addressed here are networking basics, networking technologies, types of traffic, and convergence of computer and communication networks.

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Converged Networking: A Review of Concepts and Technologies

Transmission control protocol/Internet protocol (TCP/IP) is the de facto standard of the networking world. It dynamically adjusts routing of packets to accommodate failures in channels and allows construction of very large networks with little central management. But IP packets are based on the datagram model and are not really suited to real-time traffic. In order to overcome the drawbacks, a new network technology, ATM, is proposed. ATM provides quality of service (QOS) guarantees for various classes of applications and in-order delivery of packets via connection oriented virtual circuits. Unfortunately, when ATM is to be internetworked with the existing network infrastructure, some special signaling, addressing and routing protocols are needed. IP over ATM is one of the methods proposed by IETF. It allows existing TCP/IP applications to run on ATM end-stations and ATM networks to interconnect with legacy LAN/WAN technologies. But the performance of TCP/IP over ATM leaves something to be desired. Partial packet discard (PPD) and early packet discard (EPD) are two schemes to improve its performance. This paper proposes a "selective packet retransmission" scheme for improving HTTP/TCP performance when transmitting through ATM networks. In selective packet retransmission, we take advantage of the property of humans' perception tolerance for errors to determine whether to retransmit a corrupted TCP segment or not. For lossable data, such as images, when an error occurs because of cell losses, it will not be retransmitted. The simulations show that, for the same buffer size and traffic load, selective packet retransmission performs better than PPD, EPD, and plain TCP over ATM.

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Chin-Dong Wang

Papers

Improved WWW multimedia transmission performance in HTTP/TCP over ATM networks