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The influence of load prediction methods on the quality of service of connections in the multiprocessor environment

Grzech A., Świątek P.

Systems Science

2009

Vol. 35, no 3

7-14

This paper is devoted to the performance analysis of the multiprocessor teletraffic processing environment under control of different resource allocation algorithms. It is assumed that the quality of service of incoming traffic is measured as the average delay of connections imposed by processing. In order to minimize the average delay each incoming connection is directed to be processed on the server, the average load of which during processing of this connection would be minimal. Applied allocation algorithms differ in the method of prediction of servers average future load. It is shown on representative numerical examples that the choice of appropriate load predictor has significant impact on the quality of service delivered by the traffic processing system considered.

Repair servers in unreliable packet-switched computer network with multicast traffic

Grzech A., Zelem J.

Systems Science

2002

Vol. 28, nr 4

85-108

The paper discusses localization of repair servers at the nodes of an unreliable packet-switched computer communication network, where the latter supports multicast traffic. It is assumed that the multicast traffic is carried in unreliable network, i.e., via unreliable communication channels characterized by failure probabilities. The problem of repair servers localization in a network with unreliable channels and multicast traffic may be considered as a problem of multicast efficiency in terms of network resource consumption and average packets delay introduced by the network. For the purpose of the paper it is assumed that the quality of multicast network in terms of network resource utilization is measured by average delay of transferred packets. The aim of repair servers localization at various nodes of the network considered is to decrease average packet delay delivered by the network.