Capacity increase in cellular radio networks using intelligent underlay overlay

Intelligent underlay overlay, a network feature which enables significant capacity increases in digital cellular TDMA radio networks, is described. The capacity increase is obtained from existing 'macro'-base station (BTS) sites since intelligent underlay overlay enables a more efficient utilisation of radio channels than currently possible. Theoretical principals and differences in functionality between intelligent underlay overlay and conventional underlay overlay are highlighted. In addition the aspect of dimensioning IUO cells is addressed.