The OSGi platform is a service-oriented architecture allowing the deployment of software components (called bundles). This report proposes an architecture allowing a bundle activity to be suspended and later resumed in the OSGi platform. This architecture consists primarily in an extension to the OSGi specification. In order to ease the development of bundles according to this extension to the specification, a centralized thread management is proposed. An implementation of these extensions is presented. It is based on Apache Felix, a particular implementation of the OSGi specification.