Method for providing a context information to a context-aware application, context server, and context-aware system comprising at least one such context server

摘要

The invention relates to a context server (2), a context-aware system (1) and a method for providing a context information (C1) to a context-aware application (3). The method comprises the steps of: receiving at least one context information (C1,C2) together with a first QoC parameter (r1,r2), ie. an accuracy measure of the context information, from at least one available context source (CS1,CS2); determining a second QoC parameter (p1,p2), i.e. a probability of correctness of the context information; and the first and the second QoC parameters are correlated. In case that a quality level derived from the second QoC parameter of the context information is lower than a quality level (p*) which is requested by the context-aware application, the first QoC parameter (r1) is modified for adjusting the second QoC parameter in order to attain or exceed the requested quality level (p*); and the context information is provided together with the possibly modified first QoC parameter (x* r1) to the context-aware application.