A method and apparatus is provided for improving bandwidth usage in a cellular communication network serving at least one mobile terminal, the network being arranged to use a predefined bandwidth range. The apparatus includes a base band unit for capable of supporting at least a first radio access technology and a second radio access technology, a counting means for determining the number of mobile terminals within a cell of the first radio access technology supporting the second radio access technology and a measuring means for determining the level of traffic carried by the first radio access technology cell. Bandwidth assignment means are also provided so that the bandwidth assigned to GSM and LTE can be configured to take account of changes in the traffic levels and device capabilities in either RAT.