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As the Internet evolves towards the global multi-service network of the future, a key consideration is support for services with guaranteed Quality of Service (QoS). The proposed Differentiated Services (DiffServ) framework is seen as the key technology to achieve this. DiffServ currently concentrates on control/data plane mechanisms to support QoS but also recognises the need for management plane aspects through the Bandwidth Broker (BB). In this article we propose a model and architectural framework for supporting DiffServ-based end-to-end QoS in the Internet, assuming underlying MPLS-based explicit routed paths. The proposed integrated management and control architecture will allow providers to offer both quantitative and qualitative based services while optimising the use of underlying network resources.

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