SSR Improvement in OFDMA Femtocell Networks

To enhance indoor coverage and capacity of fourth generation cellular networks femtocells are introduced. These are the small cellular base station installed in a home or buildings. Femtocells are deployed in the existing macrocell networks. Both uses same frequency band. Since both femtocell and macrocell uses same frequency band there is a problem of interference between the femtocell and macrocell, which reduces the performance of these networks. Therefore it is necessary to allocate resources to them in such a way that interference is mitigated. In order to improve the performance a distributed Resource allocation using link state propagation algorithm is proposed. Which allocate OFDMA resources to all femtocell in the network. This method gives better Spectral Spatial Reuse (SSR) than the existing methods. Key wordsFemtocells, orthogonal frequencydivision multiple access (OFDMA),Spectral Spatial Reuse(SSR), resource allocation.