1) The document proposes a scientific framework that introduces mobile web services-based collector nodes to perform distributed in-network computations for wireless sensor networks (WSNs). 2) Network computations in wireless networks present a scientific challenge compared to fixed networks. The collaboration between collector nodes can produce higher-valued mobile web services. 3) The research aims to contribute to the state-of-the-art network computation theory of WSNs in the long run by focusing on real-world problems and developing solutions, with the potential to support the UMIC RA B1 project concerning wireless communications in infrastructure-less environments.