A Dynamic QoS Management for Next Generation of Services

Heterogeneity, distribution, mobility, all these factors induce changes in the way of conceiving services. Dynamicity and service virtualization are key needs. Service composition was established to be a first promising answer. Henceforth, in previous work, we proposed to combine different service components to create a Virtual Private Service Network (VPSN) providing a personalized global service. In this paper, we address the self-maintenance of these overlay service networks by proposing the use of Virtual Service Communities (VSCs) constituted of functionally equivalent service elements with differentiated levels of QoS. These VSCs are self-organized by using a peer-to-peer (P2P) approach. Our purpose is to proactively maintain the end-to-end Quality of Service (QoS) to meet the service level agreement. automatic actions are started following QoS degradation in order to achieve autonomous management. A case study is described in order to illustrate our proposition and an implementation is presented to validate it.