Threshold based admission policies for multi-rate services in the DECT system

We address the problem of efficiently using the resources in the digital European cordless telephone (DECT) system in multi-rate situations. We consider two type of users: high rate data traffic which needs more that one time slot per time frame and low rate voice traffic needing one time slot per time frame. The physical layer of the DECT system is reviewed as well as the threshold based policies for call admission. The threshold policies were implemented and the performance determined based on a cost function. The results were obtained for heavy, medium and light traffic loads. It was shown that an optimum threshold to minimize the loss function can be found. With the implementation of threshold policies, the system has also became more fair for the users