A number of different coordination models for dynamic resource allocation are proposed, The models are based on an asynchronous and distributed approach which makes use of mobile agents to distribute the resources of the providers between the consumers. Each provider has a broker, i.e., the mobile agent, that continually visits all or a subset of the consumers, offering the resources currently available at the corresponding provider. The models are increasingly complex, starting with a rather simple static mechanism, and ending with a sophisticated solution that balance the allocations both from the consumer and the provider perspective. Finally, an evaluation of the models in a realistic Intelligent Network domain is presented.