Analisis Pengaruh Penempatan Femtocell Terhadap Sel Makro Jaringan UMTS

Due to the enormous increase of cellular telecommunication systems, mobile data also needs faster access. The Femtocell is the right answer to fulfill the cellular telecommunication system requirements nowadays. The Femtocell is used to cover the areas with a low signal from the Macrocell and also the areas that need a bigger data rate. When using the Femtocell it can produces sometimes interference signals to the Macrocell in uplink as well as in downlink communication because not all of the users can be connected to the Femtocell in a Closed Subscriber Group Femtocell system. This thesis analyses and calculates how the Closed Subscriber Group Femtocell affects the Macrocell in both ways - in uplink to the Macrocell and also in downlink to the Macrocell User Equipment for the maximum power of the Femtocell with 21 dBm. Power Interferences are observed and compared with the real power received in the same coverage area. The current study was calculated with the help of the application ‘Matlab’. The result from the analysis of the Closed Subscriber Group Femtocell is that the Macrocell is affected in both ways - uplink and also downlink. The parameter for uplink interferences is shown by the Noise Rise. The coverage result for accepted Noise Rise point (6dB) for minimum threshold for the communication happens is 39 meters. The parameter for downlink interferences is shown by Ec/N0, the coverage result for accepted Ec/N0 point (18dB) for the minimum threshold for the communication happens is 267meters.