by

DOI: 10.1023/A:1021160209525
Print publication date: 12/1/2002
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by Kim, Seong Beom; Suda, Koichi; Hong, Choong Seon; Kiriha, Yoshiaki

DOI: 10.1023/A:1021111723636
Print publication date: 12/1/2002
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by

DOI: 10.1023/A:1021112014762
Print publication date: 12/1/2002
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by

DOI: 10.1023/A:1021100330691
Print publication date: 12/1/2002
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by Abdu, Hasina; Lutfiyya, Hanan; Bauer, Michael A.

With the increased availability and complexity of distributed systems comes a greater need for solutions to assist in the management of distributed systems. Despite the significant contributions made towards the development of management tools that monitor and control distributed systems, little has been done to address issues such as optimizing the execution of management functions with respect to system and management requirements. This paper presents a management optimization model in which management agents and managed objects are efficiently configured on the basis of a set of system and management requirements. We illustrate our model and describe its implementation through a Branch- and Bound-based algorithm and a web-based interface. The latter enables users to specify the requirements used by the optimization algorithm to determine efficient management configurations. It also includes an XML-based interface through which management agents can be started independent of the underlying platforms. Performance characteristics of the proposed algorithm as well as experimental results to illustrate the validity of the model are also described.

DOI: 10.1023/A:1021116306389
Print publication date: 12/1/2002
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by Choudhury, Romit Roy; Paul, Krishna; Bandyopadhyay, Somprakash

Supporting high volume of data transmission in a highly dynamic architecture like Mobile Ad hoc Networks (MANET) still remains a major point of research. In this paper, we have attempted to address the issue of managing an uninterrupted connection between a source and a destination through multiple paths in a temporal domain. We have developed an agent-centric protocol that would accomplish uninterrupted communication over adaptively selected routes. The protocol ensures minimal consumption of network resources. We have organized this work in two logical steps. In the first part, we have described an agent-based framework with its associated protocols and mechanisms. The primary objective of this mobile multiagent framework is to make all nodes in the system topology-aware. We have used the GPS (Global Positioning System) support at each node for the extraction of geographical coordinates, velocity, and direction of movement of each node. The second part of the work attempts to make use of this topology awareness in the context of establishing and managing a connection between two nodes. The agent-enabled proactive replenishment of fresh topology information enables each node to constantly evaluate network conditions and to take decisions on adaptive route selection.

DOI: 10.1023/A:1021164222319
Print publication date: 12/1/2002
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by Morley, G. D.; Grover, W. D.

We address two questions related to the design and management of ring-based networks and the choice of add–drop multiplexer (ADM) technology. One issue is the benefit of a channel interchange capability in the ADMs of SONET or WDM rings. Although counterintuitive, we show that there is essentially no benefit from this potentially expensive capability if the selection of demands for ring loading is optimally planned for each case. This knowledge can help prioritize standards-making and equipment development efforts. A second question relates to provisioning demands over more than one route through a ring. Administration and provisioning is simplified by prescribing a single route per origin–destination pair, but in a ring-based network there is an as yet unquantified penalty to enforcing this operational policy rather than allowing “splitting” of routes within rings. To assess the benefits of channel interchange and route splitting, together and individually, we solve the respective integer programming formulation to find the optimal revenue or transport efficiency loading solutions. Conclusions are based on comparing efficiency and revenue metrics on a large number of randomized trials with different ring sizes, demand patterns, and line capacities. Results show that while channel interchange has negligible beneficial effect, route splitting can provide significant revenue or efficiency benefits.

DOI: 10.1023/A:1021112205481
Print publication date: 12/1/2002
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by Jia, Weijia; Xu, Gaochao; Zhao, Wei; Au, Pui-On

A novel efficient and dynamic multicast routing protocol based on anycast routing techniques is presented. The contributions of the protocol differ from well-known shared-tree systems in two aspects: (1) Off-tree anycast routing: The nodes in the shared tree are formed into a virtual anycast group and multicast sources use anycast routing to select a better path from the source to one router in the group to achieve short delay and fault-tolerance. (2) On-tree dynamic routing: The shared-tree approach is extended with capability of alternative path selections. If a node becomes absent from the shared tree, some predefined backup path(s) is (are) used to bypass the node and enable dynamic multicast routing to continue. The protocol requires only the routers near the faulty node to be reconfigured, thus reducing the runtime overhead as compared with global reconfiguration. The simulation data demonstrates the efficiency of our routing protocol.

DOI: 10.1023/A:1021108104572
Print publication date: 12/1/2002
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by Ferner, Clayton; Vetter, Ron

This paper presents an integrated framework for describing and implementing quality of network (QoN) concepts. It focuses on identifying a systems engineering framework for better understanding how to specify and implement QoN concepts. We demonstrate, by means of several examples, that the quality of service interfaces between the end user and the underlying network are very important. Finally, we provide insights as to future development efforts needed to realize the goal of high quality networks.

DOI: 10.1023/A:1021160121410
Print publication date: 12/1/2002
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by Wee, Chin Mun; Beg, M. Salim

DOI: 10.1023/A:1021158320502
Print publication date: 12/1/2002
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