Abstract: The invention relates to a method which makes decisions, which can be applied an various WAP protocol, based on calculations which determine the future quality of a link. Short-term forecasting involving fundamental decisions such as the structure of a link or the transmission or reception of data occurs. Short-term forecasting is used to modify certain parameters which are linked to the transmission of packets.

Abstract: An application unit and a modem unit for mobile communication are provided. The application unit comprises at least one application that exchanges data traffic with at least one protocol stack, wherein said at least one protocol stack transfers data between at least one of the applications and at least one physical interface. The modem unit comprises a broadcast facility for setting up a wireless connection, and at least one transmission protocol stack for transferring data traffic between the at least one physical interface and the broadcast facility. The modem unit collects flow control information about the status of the wireless connection. The flow control information are packed into an IP packet which is sent via the physical interface to the application unit. The application unit uses the received flow control information to optimize the quality of service.

Abstract: The quality of radio links, such as UMTS radio links, is predicted by measuring at least one quality-related parameter of the radio link and analyzing commands for controlling the radio link that pertain to the quality-related parameters. Preferably, the quality-related parameter measures or determines the quality of the uplink or downlink. The determined parameters are transmitted to an algorithm which can make predictions about the future. Preferably, the algorithm represents a multidimensional stochastic algorithm which utilizes covariance matrices. Other algorithms can use neural networks, genetic algorithms, and/or simulated annealing.