Method and communication system for selecting a transmission mode for transmitting user data

The invention relates to a method and communication system, a between the first communication device (EG1) and second communication device (EG2) is available data and method of transmission of grouping, transmit for communication device (EG1, EG2) and transmission is quality of service device (DGE). Service quality device (DGE) selects one or more mode of transmission from the tabulations with the aid of available transmission resources, so is fixed by selecting method of transmission's service quality of ensuring consistency between datum is available transmission resources. The mode of transmission device are is transmitted to the connection control device (VS2); the connecting control device (VS2) moulded to the communication device (EG1, EG2) filled with a selecting of further mode of transmission from the mode of transmission for transmitting. The aid of through the further selecting mode of the transmission device are to the communication device (EG1, EG2) is available data (NV).