Walter T. Penzhorn

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—Existing communication utilities, such as the ISO/OSI model and the associated automation pyramid, have limitations regarding the increased complexity of modern automation systems. The introduction of profiles for fieldbus systems, or field-area networks (FANs), was an important innovation. However, in the foreseeable future the number of FAN nodes in(More)
— In this paper we propose architecture and design methodology for the Inter-Domains Security Management (IDSM) Model for the IP Multimedia System (IMS) [1] which is standardized by Third Generation Partnership Project (3GPP) [2] and 3GPP2 [3] as Next Generation Mobile Networks. The IDSM Model is based on Trust Domain Relationship between different network(More)
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