The invention relates to a network with a first plurality of logic channels with which is associated a second plurality of transport channels,which transport channels are provided for transmitting transport blocks formed from packet units of the logic channels,wherein a plurality of valid transport format combinations is allocated to the transport channels, which combinations indicate the transport blocks provided for transmission on each transport channel,wherein a selection algorithm is provided for selecting the transport format combinations, andwherein it is provided that the selection of the transport format combinations is carried out while maintaining a minimum bit rate applicable to the respective logic channel.