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In this paper, we propose a new methodology based on economic models to provide Quality 0.f Service (QoS) guarantees to competing traffic classes (classes of sessions) in packet networks. We consider an economic model of a packet network where resources are priced. Traffic classes compete for network resources and they purchase them to satisfy their QoS needs. Our contributions are the following: 1) We provide a new definition for QoS provisioning based on economic models (Pareto efficiency). 2) We obtain the set of optimal resource allocations (Pareto optimal) which provide QoS guarantees to competing traffic classes. 9) We show the impact #on equilibrium prices and optimal allocations due to traffic load and variability, and QoS requirements. 4 ) We propose packet scheduling and admission policies to provide QoS guarantees to traffic classes based on available QoS and prices in the network.

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IBM products increasingly implement a service-oriented architecture (SOA), in which programmers build services, use services, and develop solutions that aggregate services. IBM Software Group middleware products and tools support the development and deployment of SOA solutions, and increasingly make functional interfaces between components and products visible through a service model. Software Group components will increasingly use SOA standards for intracomponent communications. Our move to SOA encompasses both the programming model and lower-level infrastructure software, for example, systems-management and storage-management application programming interfaces and functions. This paper concisely defines the IBM SOA programming model and the product architecture that supports it. We provide the motivation for our programming-model and design decisions. This paper also focuses on the architectural concepts that underlie our programming model and product architecture.