A pervasive computing system (PCS) requires that devices be context aware in order to provide proactively adapted services\r\naccording to the current context. Because of the highly dynamic environment of a PCS, the service adaptation task must be\r\nperformed during device operation. Most of the proposed approaches do not deal with the problem in depth, because they are\r\neither not really context aware or the problem itself is not thought to be dynamic. Devices in a PCS are generally hand-held, that\r\nis, they have limited resources, and so, in the effort to make them more reliable, the service adaptation must take into account this\r\nconstraint. In this paper, we propose a dynamic service adaptation approach for a device operating in a PCS that is both context\r\naware and limited resources aware. The approach is then modeled using colored Petri Nets and simulated using the CPN Tools, an\r\nimportant step toward its validation.
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