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Collaboration in software engineering projects is usually intensive and requires adequate support by wellintegrated tools. However, process-centered software engineering environments (PSEE) have traditionally been designed to exploit integration facilities in other tools, while offering themselves little to no such facilities. This is in line with the vision of the PSEE as the central orchestrator of project support tools. We argue that this view has hindered the widespread adoption of process-based collaboration support tools by incurring too much adoption and switching costs. We propose a new process-based collaboration support architecture, backed by a process metamodel, that can easily be integrated with existing tools. The proposed architecture revolves around the central concepts of 'deep links' and 'hooks'. Our approach is validated by analyzing a collection of opensource projects, and integration utilities based on the implemented process model server have been developed.

This paper deals with the design of a distributed architecture and of mechanisms that are able to guarantee Quality of Service (QoS) in a set of DiffServ domains. The design includes the proposal of a signaling protocol to accept or reject the transmission of flows in a set of adequately controlled domains. More particularly, it provides a proposal for (1) selecting the end-to-end QoS paths resulting from concatenations of the IP services provided by the domains involved in the data path and (2) ensuring that the chosen concatenations fulfil the requested user QoS requirements. With respect to other work, this paper first tries to minimise the use of network resources by discovering the real performance of each domain. Second, the signaling protocol is designed to bring as less constraints as possible on the architecture. It defines the end-to-end concatenations only as a set of transfer bridges, or inter-domain links, and leaves all internal domain paths fully open to any implementation by the domain providers.The architecture, based on the use of bandwidth brokers, provides an answer to the two main problems related to such approaches, i.e. how to identify and build the sequence of the needed bandwidth brokers and how to select the ingress and egress routers of each of these domains to construct the end-to-end paths.Acknowledgement: This work has been is partially realised within the framework of the European IST EuQoS project (http://www.euqos.org).

This paper deals with the problem of QoS signaling across multiples domains in a context of topological changes due to mobility. Data path changes caused by mobility can degrade severely the service continuity to mobile terminals considering the end-to-end QoS inter-domain path reestablishment. We propose an efficient NSIS-based scheme to allow end-to-end QoS path maintenance under mobility. The domains are controlled by central resource managers acting as bandwidth brokers. The scheme addresses two open issues in the area: (a) the integration of NSIS with Hierarchical Mobile IP including anchor points collaboration to QoS signaling, and (b) the use of NSIS in an hybrid on and off -path context, exploring the common off-path points to improve signaling. The signaling procedure aims to reduce the impact of mobility in the time to setup new QoS paths and the time to tear down unused resources.

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