: This paper presents the networking architecture developed in the CASCOM research project. This architecture provides an efficient and reliable communication support and service discovery for pervasive intelligent P2P business applications. We give an overview how wireless environments and resource-poor devices are taken into account in our architecture. For that, we have designed and implemented a new agent platform for resource-poor devices, which is a modified version of JADE/LEAP. Agents are used to coordinate (semantic) web services in the health care domain. To support the discovery of such web services descriptions, we shortly describe a distributed directory system called WSDir. It is based on federation of repositories of web service descriptions that are managed with pre-defined policies. Our architecture is being evaluated using a sample ad-hoc emergency health care assistance application scenario.