Wuest, BjoernDrögehorn, OlafDavid, KlausDadam, PeterReichert, Manfred2019-10-112019-10-1120043-88579-380-6https://dl.gi.de/handle/20.500.12116/28774Recently mobile devices became powerful enough to support outstanding applications envisioned for ubiquitous and pervasive computing. In these environments applications are usually built on top of a middleware in order to enable service reuse on different levels. Existing middleware approaches, however, aim at either operation in the network infrastructure or are built for specific purposes. In this paper an approach for structuring services and their management into several well defined layers is introduced and their requirements are discussed in detail.enText/Conference Paper1617-5468