Smart interference reduction dynamic MAIO allocation strategy for GERAN networks

A novel smart interference reduction dynamic MAIO allocation (SIR-DMA) strategy for boosting voice capacity in synchronized GERAN networks with limited bandwidth is proposed. Global interference reduction is achieved by introducing into a standard DMA algorithm the new concept of concentric MAIO, associating an inner/outer MAIO with a mobile exposed to a low/high inter-site interference. Utilizing the inner/outer MAIO classification SIR-DMA tries to allocate calls in mutually interfering cells on orthogonal timeslots (TS) the degree of orthogonalization, however, depending on the combination of the associated MAIO types, thus minimizing the inter-site interference. Finally SIR-DMA selects the best TS/MAIO combination by taking additionally into account the intra-site interference. The initial evaluation shows a capacity gain of about 20% compared to conventional DMA. The interaction of SIR-DMA with the upcoming SAIC capable MS as well as state-of-the-art switched beam technology has been studied, achieving capacity figures close to the hard blocking limit of a real one by one reuse.