Showing papers on "Cognitive network published in 1998"

Next-generation networks

Abstract: Dramatic changes in technology, network services, and regulation are driving the rapid definition and implementation of new network architectures and elements. This paper discusses the forces that are moving today's networks toward converged, next-generation networks. It also provides a multiservice, high-performance, and highly reliable next-generation network architecture. This architecture serves as a framework for placing the papers in this issue in context. Together, these papers provide a view of Lucent Technologies' Network Vision with a focus on packet networking, including network architecture and planning, intelligent packet switching, packet voice, quality of service, virtual private networks, and network and service management.

OSI systems and network management

Abstract: Data communications standards to allow exchange of information between two application processes in different heterogeneous computing environments have been developed by International Standards groups. With the development of these standards, the need for managing the communications protocols was realized as part of both the Internet and OSI standards suites. This article addresses the network management paradigm developed as part of OSI standards. The OSI network management application includes three different aspects: categories of network management, a protocol that specifies the structure for transferring network management information, and information models that define resource-specific management information for the specific management functions. These three aspects will be described in this article. Network management functions are grouped into five categories: configuration, fault, performance, security, and accounting. The resource is managed to accomplish these functions. These five categories have been used not only in OSI network management but also in specifying the management functions for telecommunications network. These five categories are briefly discussed in the paper. The protocol structure for OSI network management is defined as an application service element known as CMISE. Regardless of the resource being managed, the protocol defines a basic set of operations applicable to network management. The article discusses the semantics of the various operations and the parameters associated with each operation. Using the structure defined by the protocol, for the various management functions, information is modeled to represent the managed resource. Object-oriented principles are used in defining information models. An introduction to these principles is provided. The management information exchanged is a combination of the three aspects. As part of OSI network management, information models to represent communication entities have been developed. An example is shown to illustrate the exchanged message for a management function. The article reiterates the three aspects and points out the advantages offered by this network management paradigm.

A reference architecture and signalling protocols for access networks

Abstract: This paper discusses the reference architecture and the protocol structure of access networks. As an example of an access network, one could think of a bidirectional hybrid fibre coax (HFC) network. The network architecture of access networks is changing because of their evolution from distributive networks to switched networks. New functions are introduced in the network architecture and a reference model for access networks is defined, that was not available previously. The paper also describes the signalling protocol stacks in an access network and defines which new protocols are necessary.

A Study of Packet Routing in Mobile Radio Networks

Abstract: : This study is concerned with mobile packet radio networks. These networks are of importance in the context of tactical battlefield communications, where decentralized operation and antijam capability are desirable network attributes. The objective of this study is to conduct and document a survey of the known and available results on techniques for routing information through packet radio networks. We focus on issues that reside within the fust (lower) three layers of the seven-layer open system interconnection (OSI) network architecture modeL Consequently, a greater emphasis is placed on issues, such as network connectivity, media access, and routing. Where available, performance evaluation methods are detailed. Finally, we present examples of commercial, state of the art wireless data networks and discuss some open problems for further study.

Algorithms for locating resources in a communication network

Abstract: Both data communication and telecommunication networks consist of nodes, links and network resources Many studies deal with the design of optimal network topologies In current methodologies, every node presents the same constraints and behavior, while in reality, the network resources vary The research problem at stake is how to add central network resources (ie, servers, gateways, network managers, probes, mainframes, etc) in an optimal way, for example, such that the transmission delay will be minimized For small networks or for a small number of resources, it is feasible to find the optimal locations of the resources by checking all the possibilities This method cannot be applied to large networks, where a great many of resources are located In such cases the problem turns into a difficult optimization problem that can be classified as NP-complete We deal with both optimal and heuristics techniques to solve this problem