A model for using and coordinating heterogeneous mobile service providers

Research activities in mobile computing environments have been focused, in recent years. To deal with the dynamic nature of mobile environments, middleware has been cited as an appropriate approach for the development of mobile applications. Several middleware models have been proposed so far. We have proposed a new model in middleware, based on tuple-spaces. Clustering technique is applied to tuple-spaces, in order to increase the performance, when a large number of tuples are involved. The proposed model is developed, and implemented as a coordination service in mobile computing environments. Tuple-space has a few partitions and a tuple space manager controls them. We conclude that, exploiting this model improves accessibility, security and fault toleration.